/****************************************************************************** * * Module Name: uteval - Object evaluation * *****************************************************************************/ /* * 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 #include "accommon.h" #include "acnamesp.h" #include "acinterp.h" #define _COMPONENT ACPI_UTILITIES ACPI_MODULE_NAME("uteval") /* Local prototypes */ static void acpi_ut_copy_id_string(char *destination, char *source, acpi_size max_length); static acpi_status acpi_ut_translate_one_cid(union acpi_operand_object *obj_desc, struct acpi_compatible_id *one_cid); /* * Strings supported by the _OSI predefined (internal) method. */ static char *acpi_interfaces_supported[] = { /* Operating System Vendor Strings */ "Windows 2000", /* Windows 2000 */ "Windows 2001", /* Windows XP */ "Windows 2001 SP1", /* Windows XP SP1 */ "Windows 2001 SP2", /* Windows XP SP2 */ "Windows 2001.1", /* Windows Server 2003 */ "Windows 2001.1 SP1", /* Windows Server 2003 SP1 - Added 03/2006 */ "Windows 2006", /* Windows Vista - Added 03/2006 */ /* Feature Group Strings */ "Extended Address Space Descriptor" /* * All "optional" feature group strings (features that are implemented * by the host) should be implemented in the host version of * acpi_os_validate_interface and should not be added here. */ }; /******************************************************************************* * * FUNCTION: acpi_ut_osi_implementation * * PARAMETERS: walk_state - Current walk state * * RETURN: Status * * DESCRIPTION: Implementation of the _OSI predefined control method * ******************************************************************************/ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) { acpi_status status; union acpi_operand_object *string_desc; union acpi_operand_object *return_desc; u32 return_value; u32 i; ACPI_FUNCTION_TRACE(ut_osi_implementation); /* Validate the string input argument */ string_desc = walk_state->arguments[0].object; if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { return_ACPI_STATUS(AE_TYPE); } /* Create a return object */ return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); if (!return_desc) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Default return value is 0, NOT SUPPORTED */ return_value = 0; /* Compare input string to static table of supported interfaces */ for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) { if (!ACPI_STRCMP (string_desc->string.pointer, acpi_interfaces_supported[i])) { /* The interface is supported */ return_value = ACPI_UINT32_MAX; goto exit; } } /* * Did not match the string in the static table, call the host OSL to * check for a match with one of the optional strings (such as * "Module Device", "3.0 Thermal Model", etc.) */ status = acpi_os_validate_interface(string_desc->string.pointer); if (ACPI_SUCCESS(status)) { /* The interface is supported */ return_value = ACPI_UINT32_MAX; } exit: ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "ACPI: BIOS _OSI(%s) is %ssupported\n", string_desc->string.pointer, return_value == 0 ? "not " : "")); /* Complete the return value */ return_desc->integer.value = return_value; walk_state->return_desc = return_desc; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_osi_invalidate * * PARAMETERS: interface_string * * RETURN: Status * * DESCRIPTION: invalidate string in pre-defiend _OSI string list * ******************************************************************************/ acpi_status acpi_osi_invalidate(char *interface) { int i; for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) { if (!ACPI_STRCMP(interface, acpi_interfaces_supported[i])) { *acpi_interfaces_supported[i] = '\0'; return AE_OK; } } return AE_NOT_FOUND; } /******************************************************************************* * * FUNCTION: acpi_ut_evaluate_object * * PARAMETERS: prefix_node - Starting node * Path - Path to object from starting node * expected_return_types - Bitmap of allowed return types * return_desc - Where a return value is stored * * RETURN: Status * * DESCRIPTION: Evaluates a namespace object and verifies the type of the * return object. Common code that simplifies accessing objects * that have required return objects of fixed types. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_evaluate_object(struct acpi_namespace_node *prefix_node, char *path, u32 expected_return_btypes, union acpi_operand_object **return_desc) { struct acpi_evaluate_info *info; acpi_status status; u32 return_btype; ACPI_FUNCTION_TRACE(ut_evaluate_object); /* Allocate the evaluation information block */ info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); if (!info) { return_ACPI_STATUS(AE_NO_MEMORY); } info->prefix_node = prefix_node; info->pathname = path; /* Evaluate the object/method */ status = acpi_ns_evaluate(info); if (ACPI_FAILURE(status)) { if (status == AE_NOT_FOUND) { ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n", acpi_ut_get_node_name(prefix_node), path)); } else { ACPI_ERROR_METHOD("Method execution failed", prefix_node, path, status); } goto cleanup; } /* Did we get a return object? */ if (!info->return_object) { if (expected_return_btypes) { ACPI_ERROR_METHOD("No object was returned from", prefix_node, path, AE_NOT_EXIST); status = AE_NOT_EXIST; } goto cleanup; } /* Map the return object type to the bitmapped type */ switch ((info->return_object)->common.type) { case ACPI_TYPE_INTEGER: return_btype = ACPI_BTYPE_INTEGER; break; case ACPI_TYPE_BUFFER: return_btype = ACPI_BTYPE_BUFFER; break; case ACPI_TYPE_STRING: return_btype = ACPI_BTYPE_STRING; break; case ACPI_TYPE_PACKAGE: return_btype = ACPI_BTYPE_PACKAGE; break; default: return_btype = 0; break; } if ((acpi_gbl_enable_interpreter_slack) && (!expected_return_btypes)) { /* * We received a return object, but one was not expected. This can * happen frequently if the "implicit return" feature is enabled. * Just delete the return object and return AE_OK. */ acpi_ut_remove_reference(info->return_object); goto cleanup; } /* Is the return object one of the expected types? */ if (!(expected_return_btypes & return_btype)) { ACPI_ERROR_METHOD("Return object type is incorrect", prefix_node, path, AE_TYPE); ACPI_ERROR((AE_INFO, "Type returned from %s was incorrect: %s, expected Btypes: %X", path, acpi_ut_get_object_type_name(info->return_object), expected_return_btypes)); /* On error exit, we must delete the return object */ acpi_ut_remove_reference(info->return_object); status = AE_TYPE; goto cleanup; } /* Object type is OK, return it */ *return_desc = info->return_object; cleanup: ACPI_FREE(info); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ut_evaluate_numeric_object * * PARAMETERS: object_name - Object name to be evaluated * device_node - Node for the device * Address - Where the value is returned * * RETURN: Status * * DESCRIPTION: Evaluates a numeric namespace object for a selected device * and stores result in *Address. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_evaluate_numeric_object(char *object_name, struct acpi_namespace_node *device_node, acpi_integer * address) { union acpi_operand_object *obj_desc; acpi_status status; ACPI_FUNCTION_TRACE(ut_evaluate_numeric_object); status = acpi_ut_evaluate_object(device_node, object_name, ACPI_BTYPE_INTEGER, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Get the returned Integer */ *address = obj_desc->integer.value; /* On exit, we must delete the return object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ut_copy_id_string * * PARAMETERS: Destination - Where to copy the string * Source - Source string * max_length - Length of the destination buffer * * RETURN: None * * DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods. * Performs removal of a leading asterisk if present -- workaround * for a known issue on a bunch of machines. * ******************************************************************************/ static void acpi_ut_copy_id_string(char *destination, char *source, acpi_size max_length) { /* * Workaround for ID strings that have a leading asterisk. This construct * is not allowed by the ACPI specification (ID strings must be * alphanumeric), but enough existing machines have this embedded in their * ID strings that the following code is useful. */ if (*source == '*') { source++; } /* Do the actual copy */ ACPI_STRNCPY(destination, source, max_length); } /******************************************************************************* * * FUNCTION: acpi_ut_execute_HID * * PARAMETERS: device_node - Node for the device * Hid - Where the HID is returned * * RETURN: Status * * DESCRIPTION: Executes the _HID control method that returns the hardware * ID of the device. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_execute_HID(struct acpi_namespace_node *device_node, struct acpica_device_id *hid) { union acpi_operand_object *obj_desc; acpi_status status; ACPI_FUNCTION_TRACE(ut_execute_HID); status = acpi_ut_evaluate_object(device_node, METHOD_NAME__HID, ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } if (obj_desc->common.type == ACPI_TYPE_INTEGER) { /* Convert the Numeric HID to string */ acpi_ex_eisa_id_to_string((u32) obj_desc->integer.value, hid->value); } else { /* Copy the String HID from the returned object */ acpi_ut_copy_id_string(hid->value, obj_desc->string.pointer, sizeof(hid->value)); } /* On exit, we must delete the return object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ut_translate_one_cid * * PARAMETERS: obj_desc - _CID object, must be integer or string * one_cid - Where the CID string is returned * * RETURN: Status * * DESCRIPTION: Return a numeric or string _CID value as a string. * (Compatible ID) * * NOTE: Assumes a maximum _CID string length of * ACPI_MAX_CID_LENGTH. * ******************************************************************************/ static acpi_status acpi_ut_translate_one_cid(union acpi_operand_object *obj_desc, struct acpi_compatible_id *one_cid) { switch (obj_desc->common.type) { case ACPI_TYPE_INTEGER: /* Convert the Numeric CID to string */ acpi_ex_eisa_id_to_string((u32) obj_desc->integer.value, one_cid->value); return (AE_OK); case ACPI_TYPE_STRING: if (obj_desc->string.length > ACPI_MAX_CID_LENGTH) { return (AE_AML_STRING_LIMIT); } /* Copy the String CID from the returned object */ acpi_ut_copy_id_string(one_cid->value, obj_desc->string.pointer, ACPI_MAX_CID_LENGTH); return (AE_OK); default: return (AE_TYPE); } } /******************************************************************************* * * FUNCTION: acpi_ut_execute_CID * * PARAMETERS: device_node - Node for the device * return_cid_list - Where the CID list is returned * * RETURN: Status * * DESCRIPTION: Executes the _CID control method that returns one or more * compatible hardware IDs for the device. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_execute_CID(struct acpi_namespace_node * device_node, struct acpi_compatible_id_list ** return_cid_list) { union acpi_operand_object *obj_desc; acpi_status status; u32 count; u32 size; struct acpi_compatible_id_list *cid_list; u32 i; ACPI_FUNCTION_TRACE(ut_execute_CID); /* Evaluate the _CID method for this device */ status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CID, ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Get the number of _CIDs returned */ count = 1; if (obj_desc->common.type == ACPI_TYPE_PACKAGE) { count = obj_desc->package.count; } /* Allocate a worst-case buffer for the _CIDs */ size = (((count - 1) * sizeof(struct acpi_compatible_id)) + sizeof(struct acpi_compatible_id_list)); cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); if (!cid_list) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Init CID list */ cid_list->count = count; cid_list->size = size; /* * A _CID can return either a single compatible ID or a package of * compatible IDs. Each compatible ID can be one of the following: * 1) Integer (32 bit compressed EISA ID) or * 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss") */ /* The _CID object can be either a single CID or a package (list) of CIDs */ if (obj_desc->common.type == ACPI_TYPE_PACKAGE) { /* Translate each package element */ for (i = 0; i < count; i++) { status = acpi_ut_translate_one_cid(obj_desc->package. elements[i], &cid_list->id[i]); if (ACPI_FAILURE(status)) { break; } } } else { /* Only one CID, translate to a string */ status = acpi_ut_translate_one_cid(obj_desc, cid_list->id); } /* Cleanup on error */ if (ACPI_FAILURE(status)) { ACPI_FREE(cid_list); } else { *return_cid_list = cid_list; } /* On exit, we must delete the _CID return object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ut_execute_UID * * PARAMETERS: device_node - Node for the device * Uid - Where the UID is returned * * RETURN: Status * * DESCRIPTION: Executes the _UID control method that returns the hardware * ID of the device. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_execute_UID(struct acpi_namespace_node *device_node, struct acpica_device_id *uid) { union acpi_operand_object *obj_desc; acpi_status status; ACPI_FUNCTION_TRACE(ut_execute_UID); status = acpi_ut_evaluate_object(device_node, METHOD_NAME__UID, ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } if (obj_desc->common.type == ACPI_TYPE_INTEGER) { /* Convert the Numeric UID to string */ acpi_ex_unsigned_integer_to_string(obj_desc->integer.value, uid->value); } else { /* Copy the String UID from the returned object */ acpi_ut_copy_id_string(uid->value, obj_desc->string.pointer, sizeof(uid->value)); } /* On exit, we must delete the return object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ut_execute_STA * * PARAMETERS: device_node - Node for the device * Flags - Where the status flags are returned * * RETURN: Status * * DESCRIPTION: Executes _STA for selected device and stores results in * *Flags. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_execute_STA(struct acpi_namespace_node *device_node, u32 * flags) { union acpi_operand_object *obj_desc; acpi_status status; ACPI_FUNCTION_TRACE(ut_execute_STA); status = acpi_ut_evaluate_object(device_node, METHOD_NAME__STA, ACPI_BTYPE_INTEGER, &obj_desc); if (ACPI_FAILURE(status)) { if (AE_NOT_FOUND == status) { ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "_STA on %4.4s was not found, assuming device is present\n", acpi_ut_get_node_name(device_node))); *flags = ACPI_UINT32_MAX; status = AE_OK; } return_ACPI_STATUS(status); } /* Extract the status flags */ *flags = (u32) obj_desc->integer.value; /* On exit, we must delete the return object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ut_execute_Sxds * * PARAMETERS: device_node - Node for the device * Flags - Where the status flags are returned * * RETURN: Status * * DESCRIPTION: Executes _STA for selected device and stores results in * *Flags. * * NOTE: Internal function, no parameter validation * ******************************************************************************/ acpi_status acpi_ut_execute_sxds(struct acpi_namespace_node *device_node, u8 * highest) { union acpi_operand_object *obj_desc; acpi_status status; u32 i; ACPI_FUNCTION_TRACE(ut_execute_sxds); for (i = 0; i < 4; i++) { highest[i] = 0xFF; status = acpi_ut_evaluate_object(device_node, ACPI_CAST_PTR(char, acpi_gbl_highest_dstate_names [i]), ACPI_BTYPE_INTEGER, &obj_desc); if (ACPI_FAILURE(status)) { if (status != AE_NOT_FOUND) { ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s on Device %4.4s, %s\n", ACPI_CAST_PTR(char, acpi_gbl_highest_dstate_names [i]), acpi_ut_get_node_name (device_node), acpi_format_exception (status))); return_ACPI_STATUS(status); } } else { /* Extract the Dstate value */ highest[i] = (u8) obj_desc->integer.value; /* Delete the return object */ acpi_ut_remove_reference(obj_desc); } } return_ACPI_STATUS(AE_OK); }