mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-23 11:04:44 +08:00
ee387409ca
ACPICA commit 80e60d72959bb51c5d08c8500d978607a42ed81d BIOS developers may accidently put the quotes around the name strings, which converts the object references in the packages indicated by the name strings into the data objects (strings). Such kind of error has been seen in _DEP control methods on some platforms. This patch implements a workaround to correct it. Reported by Bastien Nocera. Fixed by Lv Zheng. Link: https://github.com/acpica/acpica/commit/80e60d72 Reference: https://bugzilla.kernel.org/show_bug.cgi?id=106231 Reported-and-tested-by: Bastien Nocera <bugzilla@hadess.net> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
524 lines
15 KiB
C
524 lines
15 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: nsconvert - Object conversions for objects returned by
|
|
* predefined methods
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* 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 <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acnamesp.h"
|
|
#include "acinterp.h"
|
|
#include "acpredef.h"
|
|
#include "amlresrc.h"
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME("nsconvert")
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_to_integer
|
|
*
|
|
* PARAMETERS: original_object - Object to be converted
|
|
* return_object - Where the new converted object is returned
|
|
*
|
|
* RETURN: Status. AE_OK if conversion was successful.
|
|
*
|
|
* DESCRIPTION: Attempt to convert a String/Buffer object to an Integer.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_ns_convert_to_integer(union acpi_operand_object *original_object,
|
|
union acpi_operand_object **return_object)
|
|
{
|
|
union acpi_operand_object *new_object;
|
|
acpi_status status;
|
|
u64 value = 0;
|
|
u32 i;
|
|
|
|
switch (original_object->common.type) {
|
|
case ACPI_TYPE_STRING:
|
|
|
|
/* String-to-Integer conversion */
|
|
|
|
status = acpi_ut_strtoul64(original_object->string.pointer,
|
|
ACPI_ANY_BASE, &value);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
/* Buffer-to-Integer conversion. Max buffer size is 64 bits. */
|
|
|
|
if (original_object->buffer.length > 8) {
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
/* Extract each buffer byte to create the integer */
|
|
|
|
for (i = 0; i < original_object->buffer.length; i++) {
|
|
value |= ((u64)
|
|
original_object->buffer.pointer[i] << (i *
|
|
8));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
new_object = acpi_ut_create_integer_object(value);
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
*return_object = new_object;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_to_string
|
|
*
|
|
* PARAMETERS: original_object - Object to be converted
|
|
* return_object - Where the new converted object is returned
|
|
*
|
|
* RETURN: Status. AE_OK if conversion was successful.
|
|
*
|
|
* DESCRIPTION: Attempt to convert a Integer/Buffer object to a String.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_convert_to_string(union acpi_operand_object *original_object,
|
|
union acpi_operand_object **return_object)
|
|
{
|
|
union acpi_operand_object *new_object;
|
|
acpi_size length;
|
|
acpi_status status;
|
|
|
|
switch (original_object->common.type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
/*
|
|
* Integer-to-String conversion. Commonly, convert
|
|
* an integer of value 0 to a NULL string. The last element of
|
|
* _BIF and _BIX packages occasionally need this fix.
|
|
*/
|
|
if (original_object->integer.value == 0) {
|
|
|
|
/* Allocate a new NULL string object */
|
|
|
|
new_object = acpi_ut_create_string_object(0);
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
} else {
|
|
status = acpi_ex_convert_to_string(original_object,
|
|
&new_object,
|
|
ACPI_IMPLICIT_CONVERT_HEX);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
/*
|
|
* Buffer-to-String conversion. Use a to_string
|
|
* conversion, no transform performed on the buffer data. The best
|
|
* example of this is the _BIF method, where the string data from
|
|
* the battery is often (incorrectly) returned as buffer object(s).
|
|
*/
|
|
length = 0;
|
|
while ((length < original_object->buffer.length) &&
|
|
(original_object->buffer.pointer[length])) {
|
|
length++;
|
|
}
|
|
|
|
/* Allocate a new string object */
|
|
|
|
new_object = acpi_ut_create_string_object(length);
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
/*
|
|
* Copy the raw buffer data with no transform. String is already NULL
|
|
* terminated at Length+1.
|
|
*/
|
|
memcpy(new_object->string.pointer,
|
|
original_object->buffer.pointer, length);
|
|
break;
|
|
|
|
default:
|
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
*return_object = new_object;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_to_buffer
|
|
*
|
|
* PARAMETERS: original_object - Object to be converted
|
|
* return_object - Where the new converted object is returned
|
|
*
|
|
* RETURN: Status. AE_OK if conversion was successful.
|
|
*
|
|
* DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
|
|
union acpi_operand_object **return_object)
|
|
{
|
|
union acpi_operand_object *new_object;
|
|
acpi_status status;
|
|
union acpi_operand_object **elements;
|
|
u32 *dword_buffer;
|
|
u32 count;
|
|
u32 i;
|
|
|
|
switch (original_object->common.type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
/*
|
|
* Integer-to-Buffer conversion.
|
|
* Convert the Integer to a packed-byte buffer. _MAT and other
|
|
* objects need this sometimes, if a read has been performed on a
|
|
* Field object that is less than or equal to the global integer
|
|
* size (32 or 64 bits).
|
|
*/
|
|
status =
|
|
acpi_ex_convert_to_buffer(original_object, &new_object);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
|
|
/* String-to-Buffer conversion. Simple data copy */
|
|
|
|
new_object = acpi_ut_create_buffer_object
|
|
(original_object->string.length);
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
memcpy(new_object->buffer.pointer,
|
|
original_object->string.pointer,
|
|
original_object->string.length);
|
|
break;
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
/*
|
|
* This case is often seen for predefined names that must return a
|
|
* Buffer object with multiple DWORD integers within. For example,
|
|
* _FDE and _GTM. The Package can be converted to a Buffer.
|
|
*/
|
|
|
|
/* All elements of the Package must be integers */
|
|
|
|
elements = original_object->package.elements;
|
|
count = original_object->package.count;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if ((!*elements) ||
|
|
((*elements)->common.type != ACPI_TYPE_INTEGER)) {
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
elements++;
|
|
}
|
|
|
|
/* Create the new buffer object to replace the Package */
|
|
|
|
new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count));
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Copy the package elements (integers) to the buffer as DWORDs */
|
|
|
|
elements = original_object->package.elements;
|
|
dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
*dword_buffer = (u32)(*elements)->integer.value;
|
|
dword_buffer++;
|
|
elements++;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
*return_object = new_object;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_to_unicode
|
|
*
|
|
* PARAMETERS: scope - Namespace node for the method/object
|
|
* original_object - ASCII String Object to be converted
|
|
* return_object - Where the new converted object is returned
|
|
*
|
|
* RETURN: Status. AE_OK if conversion was successful.
|
|
*
|
|
* DESCRIPTION: Attempt to convert a String object to a Unicode string Buffer.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_convert_to_unicode(struct acpi_namespace_node * scope,
|
|
union acpi_operand_object *original_object,
|
|
union acpi_operand_object **return_object)
|
|
{
|
|
union acpi_operand_object *new_object;
|
|
char *ascii_string;
|
|
u16 *unicode_buffer;
|
|
u32 unicode_length;
|
|
u32 i;
|
|
|
|
if (!original_object) {
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* If a Buffer was returned, it must be at least two bytes long */
|
|
|
|
if (original_object->common.type == ACPI_TYPE_BUFFER) {
|
|
if (original_object->buffer.length < 2) {
|
|
return (AE_AML_OPERAND_VALUE);
|
|
}
|
|
|
|
*return_object = NULL;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* The original object is an ASCII string. Convert this string to
|
|
* a unicode buffer.
|
|
*/
|
|
ascii_string = original_object->string.pointer;
|
|
unicode_length = (original_object->string.length * 2) + 2;
|
|
|
|
/* Create a new buffer object for the Unicode data */
|
|
|
|
new_object = acpi_ut_create_buffer_object(unicode_length);
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
unicode_buffer = ACPI_CAST_PTR(u16, new_object->buffer.pointer);
|
|
|
|
/* Convert ASCII to Unicode */
|
|
|
|
for (i = 0; i < original_object->string.length; i++) {
|
|
unicode_buffer[i] = (u16)ascii_string[i];
|
|
}
|
|
|
|
*return_object = new_object;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_to_resource
|
|
*
|
|
* PARAMETERS: scope - Namespace node for the method/object
|
|
* original_object - Object to be converted
|
|
* return_object - Where the new converted object is returned
|
|
*
|
|
* RETURN: Status. AE_OK if conversion was successful
|
|
*
|
|
* DESCRIPTION: Attempt to convert a Integer object to a resource_template
|
|
* Buffer.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_convert_to_resource(struct acpi_namespace_node * scope,
|
|
union acpi_operand_object *original_object,
|
|
union acpi_operand_object **return_object)
|
|
{
|
|
union acpi_operand_object *new_object;
|
|
u8 *buffer;
|
|
|
|
/*
|
|
* We can fix the following cases for an expected resource template:
|
|
* 1. No return value (interpreter slack mode is disabled)
|
|
* 2. A "Return (Zero)" statement
|
|
* 3. A "Return empty buffer" statement
|
|
*
|
|
* We will return a buffer containing a single end_tag
|
|
* resource descriptor.
|
|
*/
|
|
if (original_object) {
|
|
switch (original_object->common.type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
|
|
/* We can only repair an Integer==0 */
|
|
|
|
if (original_object->integer.value) {
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
if (original_object->buffer.length) {
|
|
|
|
/* Additional checks can be added in the future */
|
|
|
|
*return_object = NULL;
|
|
return (AE_OK);
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
default:
|
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
}
|
|
}
|
|
|
|
/* Create the new buffer object for the resource descriptor */
|
|
|
|
new_object = acpi_ut_create_buffer_object(2);
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
buffer = ACPI_CAST_PTR(u8, new_object->buffer.pointer);
|
|
|
|
/* Initialize the Buffer with a single end_tag descriptor */
|
|
|
|
buffer[0] = (ACPI_RESOURCE_NAME_END_TAG | ASL_RDESC_END_TAG_SIZE);
|
|
buffer[1] = 0x00;
|
|
|
|
*return_object = new_object;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_to_reference
|
|
*
|
|
* PARAMETERS: scope - Namespace node for the method/object
|
|
* original_object - Object to be converted
|
|
* return_object - Where the new converted object is returned
|
|
*
|
|
* RETURN: Status. AE_OK if conversion was successful
|
|
*
|
|
* DESCRIPTION: Attempt to convert a Integer object to a object_reference.
|
|
* Buffer.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_convert_to_reference(struct acpi_namespace_node * scope,
|
|
union acpi_operand_object *original_object,
|
|
union acpi_operand_object **return_object)
|
|
{
|
|
union acpi_operand_object *new_object = NULL;
|
|
acpi_status status;
|
|
struct acpi_namespace_node *node;
|
|
union acpi_generic_state scope_info;
|
|
char *name;
|
|
|
|
ACPI_FUNCTION_NAME(ns_convert_to_reference);
|
|
|
|
/* Convert path into internal presentation */
|
|
|
|
status =
|
|
acpi_ns_internalize_name(original_object->string.pointer, &name);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Find the namespace node */
|
|
|
|
scope_info.scope.node =
|
|
ACPI_CAST_PTR(struct acpi_namespace_node, scope);
|
|
status =
|
|
acpi_ns_lookup(&scope_info, name, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
|
|
NULL, &node);
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
/* Check if we are resolving a named reference within a package */
|
|
|
|
ACPI_ERROR_NAMESPACE(original_object->string.pointer, status);
|
|
goto error_exit;
|
|
}
|
|
|
|
/* Create and init a new internal ACPI object */
|
|
|
|
new_object = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
|
|
if (!new_object) {
|
|
status = AE_NO_MEMORY;
|
|
goto error_exit;
|
|
}
|
|
new_object->reference.node = node;
|
|
new_object->reference.object = node->object;
|
|
new_object->reference.class = ACPI_REFCLASS_NAME;
|
|
|
|
/*
|
|
* Increase reference of the object if needed (the object is likely a
|
|
* null for device nodes).
|
|
*/
|
|
acpi_ut_add_reference(node->object);
|
|
|
|
error_exit:
|
|
ACPI_FREE(name);
|
|
*return_object = new_object;
|
|
return (AE_OK);
|
|
}
|