/******************************************************************************* * * Module Name: rslist - Linked list utilities * ******************************************************************************/ /* * Copyright (C) 2000 - 2015, 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 #include "accommon.h" #include "acresrc.h" #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME("rslist") /******************************************************************************* * * FUNCTION: acpi_rs_convert_aml_to_resources * * PARAMETERS: acpi_walk_aml_callback * resource_ptr - Pointer to the buffer that will * contain the output structures * * RETURN: Status * * DESCRIPTION: Convert an AML resource to an internal representation of the * resource that is aligned and easier to access. * ******************************************************************************/ acpi_status acpi_rs_convert_aml_to_resources(u8 * aml, u32 length, u32 offset, u8 resource_index, void **context) { struct acpi_resource **resource_ptr = ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context); struct acpi_resource *resource; union aml_resource *aml_resource; struct acpi_rsconvert_info *conversion_table; acpi_status status; ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources); /* * Check that the input buffer and all subsequent pointers into it * are aligned on a native word boundary. Most important on IA64 */ resource = *resource_ptr; if (ACPI_IS_MISALIGNED(resource)) { ACPI_WARNING((AE_INFO, "Misaligned resource pointer %p", resource)); } /* Get the appropriate conversion info table */ aml_resource = ACPI_CAST_PTR(union aml_resource, aml); if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) { if (aml_resource->common_serial_bus.type > AML_RESOURCE_MAX_SERIALBUSTYPE) { conversion_table = NULL; } else { /* This is an I2C, SPI, or UART serial_bus descriptor */ conversion_table = acpi_gbl_convert_resource_serial_bus_dispatch [aml_resource->common_serial_bus.type]; } } else { conversion_table = acpi_gbl_get_resource_dispatch[resource_index]; } if (!conversion_table) { ACPI_ERROR((AE_INFO, "Invalid/unsupported resource descriptor: Type 0x%2.2X", resource_index)); return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); } /* Convert the AML byte stream resource to a local resource struct */ status = acpi_rs_convert_aml_to_resource(resource, aml_resource, conversion_table); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Could not convert AML resource (Type 0x%X)", *aml)); return_ACPI_STATUS(status); } ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Type %.2X, AmlLength %.2X InternalLength %.2X\n", acpi_ut_get_resource_type(aml), length, resource->length)); /* Point to the next structure in the output buffer */ *resource_ptr = ACPI_NEXT_RESOURCE(resource); return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_convert_resources_to_aml * * PARAMETERS: resource - Pointer to the resource linked list * aml_size_needed - Calculated size of the byte stream * needed from calling acpi_rs_get_aml_length() * The size of the output_buffer is * guaranteed to be >= aml_size_needed * output_buffer - Pointer to the buffer that will * contain the byte stream * * RETURN: Status * * DESCRIPTION: Takes the resource linked list and parses it, creating a * byte stream of resources in the caller's output buffer * ******************************************************************************/ acpi_status acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, acpi_size aml_size_needed, u8 * output_buffer) { u8 *aml = output_buffer; u8 *end_aml = output_buffer + aml_size_needed; struct acpi_rsconvert_info *conversion_table; acpi_status status; ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); /* Walk the resource descriptor list, convert each descriptor */ while (aml < end_aml) { /* Validate the (internal) Resource Type */ if (resource->type > ACPI_RESOURCE_TYPE_MAX) { ACPI_ERROR((AE_INFO, "Invalid descriptor type (0x%X) in resource list", resource->type)); return_ACPI_STATUS(AE_BAD_DATA); } /* Sanity check the length. It must not be zero, or we loop forever */ if (!resource->length) { ACPI_ERROR((AE_INFO, "Invalid zero length descriptor in resource list\n")); return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); } /* Perform the conversion */ if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { if (resource->data.common_serial_bus.type > AML_RESOURCE_MAX_SERIALBUSTYPE) { conversion_table = NULL; } else { /* This is an I2C, SPI, or UART serial_bus descriptor */ conversion_table = acpi_gbl_convert_resource_serial_bus_dispatch [resource->data.common_serial_bus.type]; } } else { conversion_table = acpi_gbl_set_resource_dispatch[resource->type]; } if (!conversion_table) { ACPI_ERROR((AE_INFO, "Invalid/unsupported resource descriptor: Type 0x%2.2X", resource->type)); return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); } status = acpi_rs_convert_resource_to_aml(resource, ACPI_CAST_PTR(union aml_resource, aml), conversion_table); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Could not convert resource (type 0x%X) to AML", resource->type)); return_ACPI_STATUS(status); } /* Perform final sanity check on the new AML resource descriptor */ status = acpi_ut_validate_resource(NULL, ACPI_CAST_PTR(union aml_resource, aml), NULL); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Check for end-of-list, normal exit */ if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { /* An End Tag indicates the end of the input Resource Template */ return_ACPI_STATUS(AE_OK); } /* * Extract the total length of the new descriptor and set the * Aml to point to the next (output) resource descriptor */ aml += acpi_ut_get_descriptor_length(aml); /* Point to the next input resource descriptor */ resource = ACPI_NEXT_RESOURCE(resource); } /* Completed buffer, but did not find an end_tag resource descriptor */ return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); }