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755 lines
22 KiB
755 lines
22 KiB
// 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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|
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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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|
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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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* |
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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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* |
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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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|
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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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* |
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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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|
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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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|
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/* Parameters guaranteed valid by caller */ |
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|
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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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/* |
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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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* |
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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 |
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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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|
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acpi_status |
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acpi_rs_get_aei_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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|
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ACPI_FUNCTION_TRACE(rs_get_aei_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 */ |
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status = |
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acpi_ut_evaluate_object(node, METHOD_NAME__AEI, 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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/* |
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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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|
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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_method_data |
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* |
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* PARAMETERS: handle - Handle to the containing object |
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* path - Path to method, relative to Handle |
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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 or _PRS value of an |
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* object 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_method_data(acpi_handle handle, |
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const char *path, 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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|
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ACPI_FUNCTION_TRACE(rs_get_method_data); |
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|
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/* 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); |
|
}
|
|
|