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759 lines
23 KiB
759 lines
23 KiB
/*******************************************************************************
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*
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* Module Name: rsutils - Utilities for the resource manager
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acresrc.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME("rsutils")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_move_data
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*
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* PARAMETERS: Destination - Pointer to the destination descriptor
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* Source - Pointer to the source descriptor
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* item_count - How many items to move
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* move_type - Byte width
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*
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* RETURN: None
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*
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* DESCRIPTION: Move multiple data items from one descriptor to another. Handles
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* alignment issues and endian issues if necessary, as configured
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* via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
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*
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******************************************************************************/
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void
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acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
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{
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acpi_native_uint i;
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/* One move per item */
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for (i = 0; i < item_count; i++) {
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switch (move_type) {
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case ACPI_MOVE_TYPE_16_TO_32:
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ACPI_MOVE_16_TO_32(&((u32 *) destination)[i],
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&((u16 *) source)[i]);
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break;
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case ACPI_MOVE_TYPE_32_TO_16:
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ACPI_MOVE_32_TO_16(&((u16 *) destination)[i],
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&((u32 *) source)[i]);
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break;
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case ACPI_MOVE_TYPE_32_TO_32:
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ACPI_MOVE_32_TO_32(&((u32 *) destination)[i],
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&((u32 *) source)[i]);
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break;
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case ACPI_MOVE_TYPE_64_TO_64:
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ACPI_MOVE_64_TO_64(&((u64 *) destination)[i],
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&((u64 *) source)[i]);
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break;
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default:
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return;
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_resource_info
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*
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* PARAMETERS: resource_type - Byte 0 of a resource descriptor
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*
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* RETURN: Pointer to the resource conversion handler
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*
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* DESCRIPTION: Extract the Resource Type/Name from the first byte of
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* a resource descriptor.
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*
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******************************************************************************/
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struct acpi_resource_info *acpi_rs_get_resource_info(u8 resource_type)
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{
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struct acpi_resource_info *size_info;
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ACPI_FUNCTION_ENTRY();
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/* Determine if this is a small or large resource */
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if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
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/* Large Resource Type -- bits 6:0 contain the name */
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if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
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return (NULL);
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}
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size_info = &acpi_gbl_lg_resource_info[(resource_type &
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ACPI_RESOURCE_NAME_LARGE_MASK)];
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} else {
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/* Small Resource Type -- bits 6:3 contain the name */
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size_info = &acpi_gbl_sm_resource_info[((resource_type &
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ACPI_RESOURCE_NAME_SMALL_MASK)
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>> 3)];
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}
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/* Zero entry indicates an invalid resource type */
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if (!size_info->minimum_internal_struct_length) {
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return (NULL);
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}
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return (size_info);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_resource_length
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*
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* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
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*
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* RETURN: Byte Length
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*
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* DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
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* definition, this does not include the size of the descriptor
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* header or the length field itself.
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*
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******************************************************************************/
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u16 acpi_rs_get_resource_length(union aml_resource * aml)
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{
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u16 resource_length;
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ACPI_FUNCTION_ENTRY();
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/* Determine if this is a small or large resource */
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if (aml->large_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
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/* Large Resource type -- bytes 1-2 contain the 16-bit length */
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ACPI_MOVE_16_TO_16(&resource_length,
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&aml->large_header.resource_length);
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} else {
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/* Small Resource type -- bits 2:0 of byte 0 contain the length */
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resource_length = (u16) (aml->small_header.descriptor_type &
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ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
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}
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return (resource_length);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_descriptor_length
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*
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* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
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*
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* RETURN: Byte length
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*
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* DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
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* length of the descriptor header and the length field itself.
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* Used to walk descriptor lists.
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*
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******************************************************************************/
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u32 acpi_rs_get_descriptor_length(union aml_resource * aml)
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{
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u32 descriptor_length;
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ACPI_FUNCTION_ENTRY();
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/* Determine if this is a small or large resource */
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if (aml->large_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
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/* Large Resource type -- bytes 1-2 contain the 16-bit length */
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ACPI_MOVE_16_TO_32(&descriptor_length,
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&aml->large_header.resource_length);
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descriptor_length += sizeof(struct aml_resource_large_header);
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} else {
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/* Small Resource type -- bits 2:0 of byte 0 contain the length */
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descriptor_length = (u32) (aml->small_header.descriptor_type &
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ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
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descriptor_length += sizeof(struct aml_resource_small_header);
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}
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return (descriptor_length);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_set_resource_header
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*
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* PARAMETERS: descriptor_type - Byte to be inserted as the type
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* total_length - Length of the AML descriptor, including
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* the header and length fields.
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* Aml - Pointer to the raw AML descriptor
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*
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* RETURN: None
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*
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* DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
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* resource descriptor, both Large and Small descriptors are
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* supported automatically
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*
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******************************************************************************/
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void
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acpi_rs_set_resource_header(u8 descriptor_type,
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acpi_size total_length, union aml_resource *aml)
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{
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u16 resource_length;
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ACPI_FUNCTION_ENTRY();
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/* Set the descriptor type */
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aml->small_header.descriptor_type = descriptor_type;
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/* Determine if this is a small or large resource */
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if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
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/* Large Resource type -- bytes 1-2 contain the 16-bit length */
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resource_length =
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(u16) (total_length -
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sizeof(struct aml_resource_large_header));
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/* Insert length into the Large descriptor length field */
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ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
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&resource_length);
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} else {
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/* Small Resource type -- bits 2:0 of byte 0 contain the length */
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resource_length =
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(u16) (total_length -
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sizeof(struct aml_resource_small_header));
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/* Insert length into the descriptor type byte */
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aml->small_header.descriptor_type |= (u8) resource_length;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_resource_type
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*
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* PARAMETERS: resource_type - Byte 0 of a resource descriptor
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*
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* RETURN: The Resource Type with no extraneous bits (except the
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* Large/Small descriptor bit -- this is left alone)
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*
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* DESCRIPTION: Extract the Resource Type/Name from the first byte of
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* a resource descriptor.
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*
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******************************************************************************/
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u8 acpi_rs_get_resource_type(u8 resource_type)
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{
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ACPI_FUNCTION_ENTRY();
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/* Determine if this is a small or large resource */
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if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
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/* Large Resource Type -- bits 6:0 contain the name */
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return (resource_type);
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} else {
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/* Small Resource Type -- bits 6:3 contain the name */
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return ((u8) (resource_type & ACPI_RESOURCE_NAME_SMALL_MASK));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_strcpy
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*
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* PARAMETERS: Destination - Pointer to the destination string
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* Source - Pointer to the source string
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*
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* RETURN: String length, including NULL terminator
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*
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* DESCRIPTION: Local string copy that returns the string length, saving a
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* strcpy followed by a strlen.
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*
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******************************************************************************/
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static u16 acpi_rs_strcpy(char *destination, char *source)
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{
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u16 i;
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ACPI_FUNCTION_ENTRY();
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for (i = 0; source[i]; i++) {
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destination[i] = source[i];
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}
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destination[i] = 0;
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/* Return string length including the NULL terminator */
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return ((u16) (i + 1));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_resource_source
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*
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* PARAMETERS: resource_length - Length field of the descriptor
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* minimum_length - Minimum length of the descriptor (minus
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* any optional fields)
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* resource_source - Where the resource_source is returned
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* Aml - Pointer to the raw AML descriptor
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* string_ptr - (optional) where to store the actual
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* resource_source string
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*
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* RETURN: Length of the string plus NULL terminator, rounded up to 32 bit
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*
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* DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
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* to an internal resource descriptor
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*
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******************************************************************************/
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u16
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acpi_rs_get_resource_source(u16 resource_length,
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acpi_size minimum_length,
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struct acpi_resource_source * resource_source,
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union aml_resource * aml, char *string_ptr)
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{
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acpi_size total_length;
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u8 *aml_resource_source;
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ACPI_FUNCTION_ENTRY();
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total_length =
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resource_length + sizeof(struct aml_resource_large_header);
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aml_resource_source = ((u8 *) aml) + minimum_length;
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/*
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* resource_source is present if the length of the descriptor is longer than
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* the minimum length.
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*
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* Note: Some resource descriptors will have an additional null, so
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* we add 1 to the minimum length.
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*/
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if (total_length > (minimum_length + 1)) {
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/* Get the resource_source_index */
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resource_source->index = aml_resource_source[0];
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resource_source->string_ptr = string_ptr;
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if (!string_ptr) {
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/*
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* String destination pointer is not specified; Set the String
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* pointer to the end of the current resource_source structure.
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*/
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resource_source->string_ptr = (char *)
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((u8 *) resource_source) +
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sizeof(struct acpi_resource_source);
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}
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/* Copy the resource_source string to the destination */
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resource_source->string_length =
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acpi_rs_strcpy(resource_source->string_ptr,
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(char *)&aml_resource_source[1]);
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/*
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* In order for the struct_size to fall on a 32-bit boundary,
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* calculate the length of the string and expand the
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* struct_size to the next 32-bit boundary.
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*/
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return ((u16)
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ACPI_ROUND_UP_to_32_bITS(resource_source->
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string_length));
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} else {
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/* resource_source is not present */
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resource_source->index = 0;
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resource_source->string_length = 0;
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resource_source->string_ptr = NULL;
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return (0);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_set_resource_source
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*
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* PARAMETERS: Aml - Pointer to the raw AML descriptor
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* minimum_length - Minimum length of the descriptor (minus
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* any optional fields)
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* resource_source - Internal resource_source
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*
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* RETURN: Total length of the AML descriptor
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*
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* DESCRIPTION: Convert an optoinal resource_source from internal format to a
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* raw AML resource descriptor
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*
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******************************************************************************/
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acpi_size
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acpi_rs_set_resource_source(union aml_resource * aml,
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acpi_size minimum_length,
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struct acpi_resource_source * resource_source)
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{
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u8 *aml_resource_source;
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acpi_size descriptor_length;
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ACPI_FUNCTION_ENTRY();
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descriptor_length = minimum_length;
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/* Non-zero string length indicates presence of a resource_source */
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if (resource_source->string_length) {
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/* Point to the end of the AML descriptor */
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aml_resource_source = ((u8 *) aml) + minimum_length;
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/* Copy the resource_source_index */
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aml_resource_source[0] = (u8) resource_source->index;
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/* Copy the resource_source string */
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ACPI_STRCPY((char *)&aml_resource_source[1],
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resource_source->string_ptr);
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/*
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* Add the length of the string (+ 1 for null terminator) to the
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* final descriptor length
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*/
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descriptor_length +=
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((acpi_size) resource_source->string_length + 1);
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}
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/* Return the new total length of the AML descriptor */
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return (descriptor_length);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_prt_method_data
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*
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* PARAMETERS: Handle - a handle to the containing object
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* ret_buffer - a pointer to a buffer structure for the
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* results
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to get the _PRT value of an object
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* contained in an object specified by the handle passed in
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*
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* If the function fails an appropriate status will be returned
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* and the contents of the callers buffer is undefined.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_prt_method_data(acpi_handle handle, struct acpi_buffer * ret_buffer)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE("rs_get_prt_method_data");
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/* Parameters guaranteed valid by caller */
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/* Execute the method, no parameters */
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status = acpi_ut_evaluate_object(handle, METHOD_NAME__PRT,
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ACPI_BTYPE_PACKAGE, &obj_desc);
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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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* Create a resource linked list from the byte stream buffer that comes
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* back from the _CRS method execution.
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*/
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status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
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/* On exit, we must delete the object returned by evaluate_object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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|
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_crs_method_data
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*
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* PARAMETERS: Handle - a handle to the containing object
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* ret_buffer - a pointer to a buffer structure for the
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* results
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to get the _CRS value of an object
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* contained in an object specified by the handle passed in
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*
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* If the function fails an appropriate status will be returned
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* and the contents of the callers buffer is undefined.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_crs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE("rs_get_crs_method_data");
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|
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/* Parameters guaranteed valid by caller */
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|
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/* Execute the method, no parameters */
|
|
|
|
status = acpi_ut_evaluate_object(handle, METHOD_NAME__CRS,
|
|
ACPI_BTYPE_BUFFER, &obj_desc);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Make the call to create a resource linked list from the
|
|
* byte stream buffer that comes back from the _CRS method
|
|
* execution.
|
|
*/
|
|
status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
|
|
|
|
/* on exit, we must delete the object returned by evaluate_object */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_rs_get_prs_method_data
|
|
*
|
|
* PARAMETERS: Handle - a handle to the containing object
|
|
* ret_buffer - a pointer to a buffer structure for the
|
|
* results
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to get the _PRS value of an object
|
|
* contained in an object specified by the handle passed in
|
|
*
|
|
* If the function fails an appropriate status will be returned
|
|
* and the contents of the callers buffer is undefined.
|
|
*
|
|
******************************************************************************/
|
|
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
acpi_status
|
|
acpi_rs_get_prs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE("rs_get_prs_method_data");
|
|
|
|
/* Parameters guaranteed valid by caller */
|
|
|
|
/* Execute the method, no parameters */
|
|
|
|
status = acpi_ut_evaluate_object(handle, METHOD_NAME__PRS,
|
|
ACPI_BTYPE_BUFFER, &obj_desc);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Make the call to create a resource linked list from the
|
|
* byte stream buffer that comes back from the _CRS method
|
|
* execution.
|
|
*/
|
|
status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
|
|
|
|
/* on exit, we must delete the object returned by evaluate_object */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
#endif /* ACPI_FUTURE_USAGE */
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_rs_get_method_data
|
|
*
|
|
* PARAMETERS: Handle - a handle to the containing object
|
|
* Path - Path to method, relative to Handle
|
|
* ret_buffer - a pointer to a buffer structure for the
|
|
* results
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to get the _CRS or _PRS value of an
|
|
* object contained in an object specified by the handle passed in
|
|
*
|
|
* If the function fails an appropriate status will be returned
|
|
* and the contents of the callers buffer is undefined.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_rs_get_method_data(acpi_handle handle,
|
|
char *path, struct acpi_buffer *ret_buffer)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE("rs_get_method_data");
|
|
|
|
/* Parameters guaranteed valid by caller */
|
|
|
|
/* Execute the method, no parameters */
|
|
|
|
status =
|
|
acpi_ut_evaluate_object(handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Make the call to create a resource linked list from the
|
|
* byte stream buffer that comes back from the method
|
|
* execution.
|
|
*/
|
|
status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
|
|
|
|
/* On exit, we must delete the object returned by evaluate_object */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_rs_set_srs_method_data
|
|
*
|
|
* PARAMETERS: Handle - a handle to the containing object
|
|
* in_buffer - a pointer to a buffer structure of the
|
|
* parameter
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to set the _SRS of an object contained
|
|
* in an object specified by the handle passed in
|
|
*
|
|
* If the function fails an appropriate status will be returned
|
|
* and the contents of the callers buffer is undefined.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_rs_set_srs_method_data(acpi_handle handle, struct acpi_buffer *in_buffer)
|
|
{
|
|
struct acpi_parameter_info info;
|
|
union acpi_operand_object *params[2];
|
|
acpi_status status;
|
|
struct acpi_buffer buffer;
|
|
|
|
ACPI_FUNCTION_TRACE("rs_set_srs_method_data");
|
|
|
|
/* Parameters guaranteed valid by caller */
|
|
|
|
/*
|
|
* The in_buffer parameter will point to a linked list of
|
|
* resource parameters. It needs to be formatted into a
|
|
* byte stream to be sent in as an input parameter to _SRS
|
|
*
|
|
* Convert the linked list into a byte stream
|
|
*/
|
|
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
|
|
status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Init the param object */
|
|
|
|
params[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
|
|
if (!params[0]) {
|
|
acpi_os_free(buffer.pointer);
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Set up the parameter object */
|
|
|
|
params[0]->buffer.length = (u32) buffer.length;
|
|
params[0]->buffer.pointer = buffer.pointer;
|
|
params[0]->common.flags = AOPOBJ_DATA_VALID;
|
|
params[1] = NULL;
|
|
|
|
info.node = handle;
|
|
info.parameters = params;
|
|
info.parameter_type = ACPI_PARAM_ARGS;
|
|
|
|
/* Execute the method, no return value */
|
|
|
|
status = acpi_ns_evaluate_relative(METHOD_NAME__SRS, &info);
|
|
if (ACPI_SUCCESS(status)) {
|
|
/* Delete any return object (especially if implicit_return is enabled) */
|
|
|
|
if (info.return_object) {
|
|
acpi_ut_remove_reference(info.return_object);
|
|
}
|
|
}
|
|
|
|
/* Clean up and return the status from acpi_ns_evaluate_relative */
|
|
|
|
acpi_ut_remove_reference(params[0]);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|