| /******************************************************************************* |
| * |
| * Module Name: rsutils - Utilities for the resource manager |
| * |
| ******************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2012, 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 "accommon.h" |
| #include "acnamesp.h" |
| #include "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: |
| case ACPI_RSC_MOVE_GPIO_RES: |
| case ACPI_RSC_MOVE_SERIAL_VEN: |
| case ACPI_RSC_MOVE_SERIAL_RES: |
| ACPI_MEMCPY(destination, source, item_count); |
| return; |
| |
| /* |
| * 16-, 32-, and 64-bit cases must use the move macros that perform |
| * endian conversion and/or accommodate hardware that cannot perform |
| * misaligned memory transfers |
| */ |
| case ACPI_RSC_MOVE16: |
| case ACPI_RSC_MOVE_GPIO_PIN: |
| 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 evaluateObject */ |
| |
| 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 evaluateObject */ |
| |
| acpi_ut_remove_reference(obj_desc); |
| return_ACPI_STATUS(status); |
| } |
| #endif /* ACPI_FUTURE_USAGE */ |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_rs_get_aei_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 _AEI 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_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, |
| 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); |
| } |