+++ /dev/null
-/*******************************************************************************
- *
- * Module Name: rsutils - Utilities for the resource manager
- *
- ******************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2008, Intel Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- */
-
-#include <acpi/acpi.h>
-#include <acpi/accommon.h>
-#include <acpi/acnamesp.h>
-#include <acpi/acresrc.h>
-
-#define _COMPONENT ACPI_RESOURCES
-ACPI_MODULE_NAME("rsutils")
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_decode_bitmask
- *
- * PARAMETERS: Mask - Bitmask to decode
- * List - Where the converted list is returned
- *
- * RETURN: Count of bits set (length of list)
- *
- * DESCRIPTION: Convert a bit mask into a list of values
- *
- ******************************************************************************/
-u8 acpi_rs_decode_bitmask(u16 mask, u8 * list)
-{
- u8 i;
- u8 bit_count;
-
- ACPI_FUNCTION_ENTRY();
-
- /* Decode the mask bits */
-
- for (i = 0, bit_count = 0; mask; i++) {
- if (mask & 0x0001) {
- list[bit_count] = i;
- bit_count++;
- }
-
- mask >>= 1;
- }
-
- return (bit_count);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_encode_bitmask
- *
- * PARAMETERS: List - List of values to encode
- * Count - Length of list
- *
- * RETURN: Encoded bitmask
- *
- * DESCRIPTION: Convert a list of values to an encoded bitmask
- *
- ******************************************************************************/
-
-u16 acpi_rs_encode_bitmask(u8 * list, u8 count)
-{
- u32 i;
- u16 mask;
-
- ACPI_FUNCTION_ENTRY();
-
- /* Encode the list into a single bitmask */
-
- for (i = 0, mask = 0; i < count; i++) {
- mask |= (0x1 << list[i]);
- }
-
- return mask;
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_move_data
- *
- * PARAMETERS: Destination - Pointer to the destination descriptor
- * Source - Pointer to the source descriptor
- * item_count - How many items to move
- * move_type - Byte width
- *
- * RETURN: None
- *
- * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
- * alignment issues and endian issues if necessary, as configured
- * via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
- *
- ******************************************************************************/
-
-void
-acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
-{
- u32 i;
-
- ACPI_FUNCTION_ENTRY();
-
- /* One move per item */
-
- for (i = 0; i < item_count; i++) {
- switch (move_type) {
- /*
- * For the 8-bit case, we can perform the move all at once
- * since there are no alignment or endian issues
- */
- case ACPI_RSC_MOVE8:
- ACPI_MEMCPY(destination, source, item_count);
- return;
-
- /*
- * 16-, 32-, and 64-bit cases must use the move macros that perform
- * endian conversion and/or accomodate hardware that cannot perform
- * misaligned memory transfers
- */
- case ACPI_RSC_MOVE16:
- ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
- &ACPI_CAST_PTR(u16, source)[i]);
- break;
-
- case ACPI_RSC_MOVE32:
- ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
- &ACPI_CAST_PTR(u32, source)[i]);
- break;
-
- case ACPI_RSC_MOVE64:
- ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
- &ACPI_CAST_PTR(u64, source)[i]);
- break;
-
- default:
- return;
- }
- }
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_set_resource_length
- *
- * PARAMETERS: total_length - Length of the AML descriptor, including
- * the header and length fields.
- * Aml - Pointer to the raw AML descriptor
- *
- * RETURN: None
- *
- * DESCRIPTION: Set the resource_length field of an AML
- * resource descriptor, both Large and Small descriptors are
- * supported automatically. Note: Descriptor Type field must
- * be valid.
- *
- ******************************************************************************/
-
-void
-acpi_rs_set_resource_length(acpi_rsdesc_size total_length,
- union aml_resource *aml)
-{
- acpi_rs_length resource_length;
-
- ACPI_FUNCTION_ENTRY();
-
- /* Length is the total descriptor length minus the header length */
-
- resource_length = (acpi_rs_length)
- (total_length - acpi_ut_get_resource_header_length(aml));
-
- /* Length is stored differently for large and small descriptors */
-
- if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
-
- /* Large descriptor -- bytes 1-2 contain the 16-bit length */
-
- ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
- &resource_length);
- } else {
- /* Small descriptor -- bits 2:0 of byte 0 contain the length */
-
- aml->small_header.descriptor_type = (u8)
-
- /* Clear any existing length, preserving descriptor type bits */
- ((aml->small_header.
- descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
-
- | resource_length);
- }
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_set_resource_header
- *
- * PARAMETERS: descriptor_type - Byte to be inserted as the type
- * total_length - Length of the AML descriptor, including
- * the header and length fields.
- * Aml - Pointer to the raw AML descriptor
- *
- * RETURN: None
- *
- * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
- * resource descriptor, both Large and Small descriptors are
- * supported automatically
- *
- ******************************************************************************/
-
-void
-acpi_rs_set_resource_header(u8 descriptor_type,
- acpi_rsdesc_size total_length,
- union aml_resource *aml)
-{
- ACPI_FUNCTION_ENTRY();
-
- /* Set the Resource Type */
-
- aml->small_header.descriptor_type = descriptor_type;
-
- /* Set the Resource Length */
-
- acpi_rs_set_resource_length(total_length, aml);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_strcpy
- *
- * PARAMETERS: Destination - Pointer to the destination string
- * Source - Pointer to the source string
- *
- * RETURN: String length, including NULL terminator
- *
- * DESCRIPTION: Local string copy that returns the string length, saving a
- * strcpy followed by a strlen.
- *
- ******************************************************************************/
-
-static u16 acpi_rs_strcpy(char *destination, char *source)
-{
- u16 i;
-
- ACPI_FUNCTION_ENTRY();
-
- for (i = 0; source[i]; i++) {
- destination[i] = source[i];
- }
-
- destination[i] = 0;
-
- /* Return string length including the NULL terminator */
-
- return ((u16) (i + 1));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_get_resource_source
- *
- * PARAMETERS: resource_length - Length field of the descriptor
- * minimum_length - Minimum length of the descriptor (minus
- * any optional fields)
- * resource_source - Where the resource_source is returned
- * Aml - Pointer to the raw AML descriptor
- * string_ptr - (optional) where to store the actual
- * resource_source string
- *
- * RETURN: Length of the string plus NULL terminator, rounded up to native
- * word boundary
- *
- * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
- * to an internal resource descriptor
- *
- ******************************************************************************/
-
-acpi_rs_length
-acpi_rs_get_resource_source(acpi_rs_length resource_length,
- acpi_rs_length minimum_length,
- struct acpi_resource_source * resource_source,
- union aml_resource * aml, char *string_ptr)
-{
- acpi_rsdesc_size total_length;
- u8 *aml_resource_source;
-
- ACPI_FUNCTION_ENTRY();
-
- total_length =
- resource_length + sizeof(struct aml_resource_large_header);
- aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
-
- /*
- * resource_source is present if the length of the descriptor is longer than
- * the minimum length.
- *
- * Note: Some resource descriptors will have an additional null, so
- * we add 1 to the minimum length.
- */
- if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) {
-
- /* Get the resource_source_index */
-
- resource_source->index = aml_resource_source[0];
-
- resource_source->string_ptr = string_ptr;
- if (!string_ptr) {
- /*
- * String destination pointer is not specified; Set the String
- * pointer to the end of the current resource_source structure.
- */
- resource_source->string_ptr =
- ACPI_ADD_PTR(char, resource_source,
- sizeof(struct acpi_resource_source));
- }
-
- /*
- * In order for the Resource length to be a multiple of the native
- * word, calculate the length of the string (+1 for NULL terminator)
- * and expand to the next word multiple.
- *
- * Zero the entire area of the buffer.
- */
- total_length = (u32)
- ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + 1;
- total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
-
- ACPI_MEMSET(resource_source->string_ptr, 0, total_length);
-
- /* Copy the resource_source string to the destination */
-
- resource_source->string_length =
- acpi_rs_strcpy(resource_source->string_ptr,
- ACPI_CAST_PTR(char,
- &aml_resource_source[1]));
-
- return ((acpi_rs_length) total_length);
- }
-
- /* resource_source is not present */
-
- resource_source->index = 0;
- resource_source->string_length = 0;
- resource_source->string_ptr = NULL;
- return (0);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_set_resource_source
- *
- * PARAMETERS: Aml - Pointer to the raw AML descriptor
- * minimum_length - Minimum length of the descriptor (minus
- * any optional fields)
- * resource_source - Internal resource_source
-
- *
- * RETURN: Total length of the AML descriptor
- *
- * DESCRIPTION: Convert an optional resource_source from internal format to a
- * raw AML resource descriptor
- *
- ******************************************************************************/
-
-acpi_rsdesc_size
-acpi_rs_set_resource_source(union aml_resource * aml,
- acpi_rs_length minimum_length,
- struct acpi_resource_source * resource_source)
-{
- u8 *aml_resource_source;
- acpi_rsdesc_size descriptor_length;
-
- ACPI_FUNCTION_ENTRY();
-
- descriptor_length = minimum_length;
-
- /* Non-zero string length indicates presence of a resource_source */
-
- if (resource_source->string_length) {
-
- /* Point to the end of the AML descriptor */
-
- aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
-
- /* Copy the resource_source_index */
-
- aml_resource_source[0] = (u8) resource_source->index;
-
- /* Copy the resource_source string */
-
- ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]),
- resource_source->string_ptr);
-
- /*
- * Add the length of the string (+ 1 for null terminator) to the
- * final descriptor length
- */
- descriptor_length +=
- ((acpi_rsdesc_size) resource_source->string_length + 1);
- }
-
- /* Return the new total length of the AML descriptor */
-
- return (descriptor_length);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_get_prt_method_data
- *
- * PARAMETERS: Node - Device node
- * ret_buffer - Pointer to a buffer structure for the
- * results
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to get the _PRT 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_prt_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_prt_method_data);
-
- /* Parameters guaranteed valid by caller */
-
- /* Execute the method, no parameters */
-
- status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT,
- ACPI_BTYPE_PACKAGE, &obj_desc);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /*
- * Create a resource linked list from the byte stream buffer that comes
- * back from the _CRS method execution.
- */
- status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
-
- /* On exit, we must delete the object returned by evaluate_object */
-
- acpi_ut_remove_reference(obj_desc);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_get_crs_method_data
- *
- * PARAMETERS: Node - Device node
- * ret_buffer - Pointer to a buffer structure for the
- * results
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to get the _CRS 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_crs_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_crs_method_data);
-
- /* Parameters guaranteed valid by caller */
-
- /* Execute the method, no parameters */
-
- status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS,
- ACPI_BTYPE_BUFFER, &obj_desc);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /*
- * Make the call to create a resource linked list from the
- * byte stream buffer that comes back from the _CRS method
- * execution.
- */
- status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
-
- /* On exit, we must delete the object returned by evaluate_object */
-
- acpi_ut_remove_reference(obj_desc);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_get_prs_method_data
- *
- * PARAMETERS: Node - Device node
- * ret_buffer - Pointer to a buffer structure for the
- * results
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to get the _PRS value of an object
- * contained in an object specified by the handle passed in
- *
- * If the function fails an appropriate status will be returned
- * and the contents of the callers buffer is undefined.
- *
- ******************************************************************************/
-
-#ifdef ACPI_FUTURE_USAGE
-acpi_status
-acpi_rs_get_prs_method_data(struct acpi_namespace_node *node,
- struct acpi_buffer *ret_buffer)
-{
- union acpi_operand_object *obj_desc;
- acpi_status status;
-
- ACPI_FUNCTION_TRACE(rs_get_prs_method_data);
-
- /* Parameters guaranteed valid by caller */
-
- /* Execute the method, no parameters */
-
- status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS,
- ACPI_BTYPE_BUFFER, &obj_desc);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /*
- * Make the call to create a resource linked list from the
- * byte stream buffer that comes back from the _CRS method
- * execution.
- */
- status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
-
- /* On exit, we must delete the object returned by evaluate_object */
-
- acpi_ut_remove_reference(obj_desc);
- return_ACPI_STATUS(status);
-}
-#endif /* ACPI_FUTURE_USAGE */
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_get_method_data
- *
- * PARAMETERS: Handle - 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,
- char *path, struct acpi_buffer *ret_buffer)
-{
- union acpi_operand_object *obj_desc;
- acpi_status status;
-
- ACPI_FUNCTION_TRACE(rs_get_method_data);
-
- /* Parameters guaranteed valid by caller */
-
- /* Execute the method, no parameters */
-
- status =
- acpi_ut_evaluate_object(handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /*
- * Make the call to create a resource linked list from the
- * byte stream buffer that comes back from the method
- * execution.
- */
- status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
-
- /* On exit, we must delete the object returned by evaluate_object */
-
- acpi_ut_remove_reference(obj_desc);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_set_srs_method_data
- *
- * PARAMETERS: 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->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->pointer, &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);
-}
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