756 lines
22 KiB
C
756 lines
22 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/*******************************************************************************
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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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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#include "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_decode_bitmask
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*
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* PARAMETERS: mask - Bitmask to decode
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* list - Where the converted list is returned
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*
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* RETURN: Count of bits set (length of list)
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*
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* DESCRIPTION: Convert a bit mask into a list of values
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*
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******************************************************************************/
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u8 acpi_rs_decode_bitmask(u16 mask, u8 * list)
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{
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u8 i;
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u8 bit_count;
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ACPI_FUNCTION_ENTRY();
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/* Decode the mask bits */
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for (i = 0, bit_count = 0; mask; i++) {
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if (mask & 0x0001) {
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list[bit_count] = i;
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bit_count++;
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}
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mask >>= 1;
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}
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return (bit_count);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_encode_bitmask
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*
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* PARAMETERS: list - List of values to encode
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* count - Length of list
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*
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* RETURN: Encoded bitmask
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*
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* DESCRIPTION: Convert a list of values to an encoded bitmask
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*
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******************************************************************************/
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u16 acpi_rs_encode_bitmask(u8 * list, u8 count)
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{
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u32 i;
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u16 mask;
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ACPI_FUNCTION_ENTRY();
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/* Encode the list into a single bitmask */
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for (i = 0, mask = 0; i < count; i++) {
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mask |= (0x1 << list[i]);
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}
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return (mask);
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}
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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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u32 i;
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ACPI_FUNCTION_ENTRY();
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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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/*
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* For the 8-bit case, we can perform the move all at once
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* since there are no alignment or endian issues
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*/
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case ACPI_RSC_MOVE8:
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case ACPI_RSC_MOVE_GPIO_RES:
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case ACPI_RSC_MOVE_SERIAL_VEN:
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case ACPI_RSC_MOVE_SERIAL_RES:
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memcpy(destination, source, item_count);
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return;
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/*
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* 16-, 32-, and 64-bit cases must use the move macros that perform
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* endian conversion and/or accommodate hardware that cannot perform
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* misaligned memory transfers
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*/
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case ACPI_RSC_MOVE16:
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case ACPI_RSC_MOVE_GPIO_PIN:
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ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
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&ACPI_CAST_PTR(u16, source)[i]);
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break;
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case ACPI_RSC_MOVE32:
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ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
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&ACPI_CAST_PTR(u32, source)[i]);
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break;
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case ACPI_RSC_MOVE64:
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ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
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&ACPI_CAST_PTR(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_set_resource_length
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*
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* PARAMETERS: 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 resource_length field of an AML
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* resource descriptor, both Large and Small descriptors are
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* supported automatically. Note: Descriptor Type field must
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* be valid.
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*
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******************************************************************************/
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void
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acpi_rs_set_resource_length(acpi_rsdesc_size total_length,
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union aml_resource *aml)
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{
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acpi_rs_length resource_length;
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ACPI_FUNCTION_ENTRY();
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/* Length is the total descriptor length minus the header length */
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resource_length = (acpi_rs_length)
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(total_length - acpi_ut_get_resource_header_length(aml));
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/* Length is stored differently for large and small descriptors */
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if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
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/* Large descriptor -- bytes 1-2 contain the 16-bit length */
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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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/*
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* Small descriptor -- bits 2:0 of byte 0 contain the length
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* Clear any existing length, preserving descriptor type bits
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*/
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aml->small_header.descriptor_type = (u8)
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((aml->small_header.descriptor_type &
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~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
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| 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_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_rsdesc_size total_length,
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union aml_resource *aml)
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{
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ACPI_FUNCTION_ENTRY();
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/* Set the Resource Type */
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aml->small_header.descriptor_type = descriptor_type;
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/* Set the Resource Length */
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acpi_rs_set_resource_length(total_length, aml);
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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 native
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* word boundary
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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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acpi_rs_length
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acpi_rs_get_resource_source(acpi_rs_length resource_length,
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acpi_rs_length 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_rsdesc_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 = ACPI_ADD_PTR(u8, aml, minimum_length);
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/*
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* resource_source is present if the length of the descriptor is longer
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* than 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 > (acpi_rsdesc_size)(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 =
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ACPI_ADD_PTR(char, resource_source,
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sizeof(struct acpi_resource_source));
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}
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/*
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* In order for the Resource length to be a multiple of the native
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* word, calculate the length of the string (+1 for NULL terminator)
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* and expand to the next word multiple.
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*
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* Zero the entire area of the buffer.
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*/
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total_length =
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(u32)strlen(ACPI_CAST_PTR(char, &aml_resource_source[1])) +
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1;
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total_length = (u32)ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
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memset(resource_source->string_ptr, 0, total_length);
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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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ACPI_CAST_PTR(char,
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&aml_resource_source[1]));
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return ((acpi_rs_length)total_length);
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}
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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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* 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 optional 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_rsdesc_size
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acpi_rs_set_resource_source(union aml_resource *aml,
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acpi_rs_length 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_rsdesc_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 = ACPI_ADD_PTR(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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strcpy(ACPI_CAST_PTR(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 += ((acpi_rsdesc_size)
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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: node - Device node
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* ret_buffer - 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(struct acpi_namespace_node *node,
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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 =
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acpi_ut_evaluate_object(node, METHOD_NAME__PRT, ACPI_BTYPE_PACKAGE,
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&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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* FUNCTION: acpi_rs_get_crs_method_data
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*
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* PARAMETERS: node - Device node
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* ret_buffer - 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(struct acpi_namespace_node *node,
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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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/* Parameters guaranteed valid by caller */
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/* Execute the method, no parameters */
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status =
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acpi_ut_evaluate_object(node, METHOD_NAME__CRS, ACPI_BTYPE_BUFFER,
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&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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* Make the call to create a resource linked list from the
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* byte stream buffer that comes back from the _CRS method
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* execution.
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*/
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status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
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/* On exit, we must delete the object returned by evaluateObject */
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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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* FUNCTION: acpi_rs_get_prs_method_data
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*
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* PARAMETERS: node - Device node
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* ret_buffer - 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 _PRS 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_prs_method_data(struct acpi_namespace_node *node,
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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_prs_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 =
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acpi_ut_evaluate_object(node, METHOD_NAME__PRS, ACPI_BTYPE_BUFFER,
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&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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* Make the call to create a resource linked list from the
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* byte stream buffer that comes back from the _CRS method
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* execution.
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*/
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status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
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/* On exit, we must delete the object returned by evaluateObject */
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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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* FUNCTION: acpi_rs_get_aei_method_data
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*
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* PARAMETERS: node - Device node
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* ret_buffer - 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 _AEI value of an object
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* 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_aei_method_data(struct acpi_namespace_node *node,
|
|
struct acpi_buffer *ret_buffer)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(rs_get_aei_method_data);
|
|
|
|
/* Parameters guaranteed valid by caller */
|
|
|
|
/* Execute the method, no parameters */
|
|
|
|
status =
|
|
acpi_ut_evaluate_object(node, METHOD_NAME__AEI, 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 evaluateObject */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_rs_get_method_data
|
|
*
|
|
* PARAMETERS: handle - Handle to the containing object
|
|
* path - Path to method, relative to Handle
|
|
* ret_buffer - 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,
|
|
const 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(ACPI_CAST_PTR
|
|
(struct acpi_namespace_node, 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: node - Device node
|
|
* in_buffer - 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.
|
|
*
|
|
* Note: Parameters guaranteed valid by caller
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_rs_set_srs_method_data(struct acpi_namespace_node *node,
|
|
struct acpi_buffer *in_buffer)
|
|
{
|
|
struct acpi_evaluate_info *info;
|
|
union acpi_operand_object *args[2];
|
|
acpi_status status;
|
|
struct acpi_buffer buffer;
|
|
|
|
ACPI_FUNCTION_TRACE(rs_set_srs_method_data);
|
|
|
|
/* Allocate and initialize the evaluation information block */
|
|
|
|
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
|
|
if (!info) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
info->prefix_node = node;
|
|
info->relative_pathname = METHOD_NAME__SRS;
|
|
info->parameters = args;
|
|
info->flags = ACPI_IGNORE_RETURN_VALUE;
|
|
|
|
/*
|
|
* 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, &buffer);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Create and initialize the method parameter object */
|
|
|
|
args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
|
|
if (!args[0]) {
|
|
/*
|
|
* Must free the buffer allocated above (otherwise it is freed
|
|
* later)
|
|
*/
|
|
ACPI_FREE(buffer.pointer);
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
args[0]->buffer.length = (u32) buffer.length;
|
|
args[0]->buffer.pointer = buffer.pointer;
|
|
args[0]->common.flags = AOPOBJ_DATA_VALID;
|
|
args[1] = NULL;
|
|
|
|
/* Execute the method, no return value is expected */
|
|
|
|
status = acpi_ns_evaluate(info);
|
|
|
|
/* Clean up and return the status from acpi_ns_evaluate */
|
|
|
|
acpi_ut_remove_reference(args[0]);
|
|
|
|
cleanup:
|
|
ACPI_FREE(info);
|
|
return_ACPI_STATUS(status);
|
|
}
|