linux/drivers/acpi/executer/exconfig.c
Bob Moore f6dd9221dd ACPI: ACPICA 20060707
Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to
support C compilers that do not allow the initialization
of address pointers within packed structures - even though
the hardware itself may support misaligned transfers. Some
of the debug data structures are packed by default to
minimize size.

Added an error message for the case where
acpi_os_get_thread_id() returns zero. A non-zero value is
required by the core ACPICA code to ensure the proper
operation of AML mutexes and recursive control methods.

The DSDT is now the only ACPI table that determines whether
the AML interpreter is in 32-bit or 64-bit mode. Not really
a functional change, but the hooks for per-table 32/64
switching have been removed from the code. A clarification
to the ACPI specification is forthcoming in ACPI 3.0B.

Fixed a possible leak of an Owner ID in the error
path of tbinstal.c acpi_tb_init_table_descriptor() and
migrated all table OwnerID deletion to a single place in
acpi_tb_uninstall_table() to correct possible leaks when using
the acpi_tb_delete_tables_by_type() interface (with assistance
from Lance Ortiz.)

Fixed a problem with Serialized control methods where the
semaphore associated with the method could be over-signaled
after multiple method invocations.

Fixed two issues with the locking of the internal
namespace data structure. Both the Unload() operator and
acpi_unload_table() interface now lock the namespace during
the namespace deletion associated with the table unload
(with assistance from Linn Crosetto.)

Fixed problem reports (Valery Podrezov) integrated: -
Eliminate unnecessary memory allocation for CreateXxxxField
http://bugzilla.kernel.org/show_bug.cgi?id=5426

Fixed problem reports (Fiodor Suietov) integrated: -
Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
- On Address Space handler deletion, needless deactivation
call (BZ 374) - AcpiRemoveAddressSpaceHandler: validate
Device handle parameter (BZ 375) - Possible memory leak,
Notify sub-objects of Processor, Power, ThermalZone (BZ
376) - AcpiRemoveAddressSpaceHandler: validate Handler
parameter (BZ 378) - Minimum Length of RSDT should be
validated (BZ 379) - AcpiRemoveNotifyHandler: return
AE_NOT_EXIST if Processor Obj has no Handler (BZ (380)
- AcpiUnloadTable: return AE_NOT_EXIST if no table of
specified type loaded (BZ 381)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-07-09 15:15:40 -04:00

515 lines
14 KiB
C

/******************************************************************************
*
* Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2006, R. Byron Moore
* 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/acinterp.h>
#include <acpi/amlcode.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>
#include <acpi/actables.h>
#include <acpi/acdispat.h>
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exconfig")
/* Local prototypes */
static acpi_status
acpi_ex_add_table(struct acpi_table_header *table,
struct acpi_namespace_node *parent_node,
union acpi_operand_object **ddb_handle);
/*******************************************************************************
*
* FUNCTION: acpi_ex_add_table
*
* PARAMETERS: Table - Pointer to raw table
* parent_node - Where to load the table (scope)
* ddb_handle - Where to return the table handle.
*
* RETURN: Status
*
* DESCRIPTION: Common function to Install and Load an ACPI table with a
* returned table handle.
*
******************************************************************************/
static acpi_status
acpi_ex_add_table(struct acpi_table_header *table,
struct acpi_namespace_node *parent_node,
union acpi_operand_object **ddb_handle)
{
acpi_status status;
struct acpi_table_desc table_info;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_TRACE(ex_add_table);
/* Create an object to be the table handle */
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
if (!obj_desc) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Init the table handle */
obj_desc->reference.opcode = AML_LOAD_OP;
*ddb_handle = obj_desc;
/* Install the new table into the local data structures */
ACPI_MEMSET(&table_info, 0, sizeof(struct acpi_table_desc));
table_info.type = ACPI_TABLE_ID_SSDT;
table_info.pointer = table;
table_info.length = (acpi_size) table->length;
table_info.allocation = ACPI_MEM_ALLOCATED;
status = acpi_tb_install_table(&table_info);
obj_desc->reference.object = table_info.installed_desc;
if (ACPI_FAILURE(status)) {
if (status == AE_ALREADY_EXISTS) {
/* Table already exists, just return the handle */
return_ACPI_STATUS(AE_OK);
}
goto cleanup;
}
/* Add the table to the namespace */
status = acpi_ns_load_table(table_info.installed_desc, parent_node);
if (ACPI_FAILURE(status)) {
/* Uninstall table on error */
(void)acpi_tb_uninstall_table(table_info.installed_desc);
goto cleanup;
}
return_ACPI_STATUS(AE_OK);
cleanup:
acpi_ut_remove_reference(obj_desc);
*ddb_handle = NULL;
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_load_table_op
*
* PARAMETERS: walk_state - Current state with operands
* return_desc - Where to store the return object
*
* RETURN: Status
*
* DESCRIPTION: Load an ACPI table
*
******************************************************************************/
acpi_status
acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
union acpi_operand_object **return_desc)
{
acpi_status status;
union acpi_operand_object **operand = &walk_state->operands[0];
struct acpi_table_header *table;
struct acpi_namespace_node *parent_node;
struct acpi_namespace_node *start_node;
struct acpi_namespace_node *parameter_node = NULL;
union acpi_operand_object *ddb_handle;
ACPI_FUNCTION_TRACE(ex_load_table_op);
#if 0
/*
* Make sure that the signature does not match one of the tables that
* is already loaded.
*/
status = acpi_tb_match_signature(operand[0]->string.pointer, NULL);
if (status == AE_OK) {
/* Signature matched -- don't allow override */
return_ACPI_STATUS(AE_ALREADY_EXISTS);
}
#endif
/* Find the ACPI table */
status = acpi_tb_find_table(operand[0]->string.pointer,
operand[1]->string.pointer,
operand[2]->string.pointer, &table);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
/* Table not found, return an Integer=0 and AE_OK */
ddb_handle = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
if (!ddb_handle) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
ddb_handle->integer.value = 0;
*return_desc = ddb_handle;
return_ACPI_STATUS(AE_OK);
}
/* Default nodes */
start_node = walk_state->scope_info->scope.node;
parent_node = acpi_gbl_root_node;
/* root_path (optional parameter) */
if (operand[3]->string.length > 0) {
/*
* Find the node referenced by the root_path_string. This is the
* location within the namespace where the table will be loaded.
*/
status =
acpi_ns_get_node(start_node, operand[3]->string.pointer,
ACPI_NS_SEARCH_PARENT, &parent_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* parameter_path (optional parameter) */
if (operand[4]->string.length > 0) {
if ((operand[4]->string.pointer[0] != '\\') &&
(operand[4]->string.pointer[0] != '^')) {
/*
* Path is not absolute, so it will be relative to the node
* referenced by the root_path_string (or the NS root if omitted)
*/
start_node = parent_node;
}
/* Find the node referenced by the parameter_path_string */
status =
acpi_ns_get_node(start_node, operand[4]->string.pointer,
ACPI_NS_SEARCH_PARENT, &parameter_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* Load the table into the namespace */
status = acpi_ex_add_table(table, parent_node, &ddb_handle);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Parameter Data (optional) */
if (parameter_node) {
/* Store the parameter data into the optional parameter object */
status = acpi_ex_store(operand[5],
ACPI_CAST_PTR(union acpi_operand_object,
parameter_node),
walk_state);
if (ACPI_FAILURE(status)) {
(void)acpi_ex_unload_table(ddb_handle);
return_ACPI_STATUS(status);
}
}
ACPI_INFO((AE_INFO,
"Dynamic OEM Table Load - [%4.4s] OemId [%6.6s] OemTableId [%8.8s]",
table->signature, table->oem_id, table->oem_table_id));
*return_desc = ddb_handle;
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_load_op
*
* PARAMETERS: obj_desc - Region or Field where the table will be
* obtained
* Target - Where a handle to the table will be stored
* walk_state - Current state
*
* RETURN: Status
*
* DESCRIPTION: Load an ACPI table from a field or operation region
*
******************************************************************************/
acpi_status
acpi_ex_load_op(union acpi_operand_object *obj_desc,
union acpi_operand_object *target,
struct acpi_walk_state *walk_state)
{
acpi_status status;
union acpi_operand_object *ddb_handle;
union acpi_operand_object *buffer_desc = NULL;
struct acpi_table_header *table_ptr = NULL;
acpi_physical_address address;
struct acpi_table_header table_header;
acpi_integer temp;
u32 i;
ACPI_FUNCTION_TRACE(ex_load_op);
/* Object can be either an op_region or a Field */
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
case ACPI_TYPE_REGION:
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Region %p %s\n",
obj_desc,
acpi_ut_get_object_type_name(obj_desc)));
/*
* If the Region Address and Length have not been previously evaluated,
* evaluate them now and save the results.
*/
if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
status = acpi_ds_get_region_arguments(obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* Get the base physical address of the region */
address = obj_desc->region.address;
/* Get part of the table header to get the table length */
table_header.length = 0;
for (i = 0; i < 8; i++) {
status =
acpi_ev_address_space_dispatch(obj_desc, ACPI_READ,
(acpi_physical_address)
(i + address), 8,
&temp);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Get the one valid byte of the returned 64-bit value */
ACPI_CAST_PTR(u8, &table_header)[i] = (u8) temp;
}
/* Sanity check the table length */
if (table_header.length < sizeof(struct acpi_table_header)) {
return_ACPI_STATUS(AE_BAD_HEADER);
}
/* Allocate a buffer for the entire table */
table_ptr = ACPI_ALLOCATE(table_header.length);
if (!table_ptr) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Get the entire table from the op region */
for (i = 0; i < table_header.length; i++) {
status =
acpi_ev_address_space_dispatch(obj_desc, ACPI_READ,
(acpi_physical_address)
(i + address), 8,
&temp);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/* Get the one valid byte of the returned 64-bit value */
ACPI_CAST_PTR(u8, table_ptr)[i] = (u8) temp;
}
break;
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Field %p %s\n",
obj_desc,
acpi_ut_get_object_type_name(obj_desc)));
/*
* The length of the field must be at least as large as the table.
* Read the entire field and thus the entire table. Buffer is
* allocated during the read.
*/
status =
acpi_ex_read_data_from_field(walk_state, obj_desc,
&buffer_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
table_ptr = ACPI_CAST_PTR(struct acpi_table_header,
buffer_desc->buffer.pointer);
/* All done with the buffer_desc, delete it */
buffer_desc->buffer.pointer = NULL;
acpi_ut_remove_reference(buffer_desc);
/* Sanity check the table length */
if (table_ptr->length < sizeof(struct acpi_table_header)) {
status = AE_BAD_HEADER;
goto cleanup;
}
break;
default:
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/* The table must be either an SSDT or a PSDT */
if ((!ACPI_COMPARE_NAME(table_ptr->signature, PSDT_SIG)) &&
(!ACPI_COMPARE_NAME(table_ptr->signature, SSDT_SIG))) {
ACPI_ERROR((AE_INFO,
"Table has invalid signature [%4.4s], must be SSDT or PSDT",
table_ptr->signature));
status = AE_BAD_SIGNATURE;
goto cleanup;
}
/* Install the new table into the local data structures */
status = acpi_ex_add_table(table_ptr, acpi_gbl_root_node, &ddb_handle);
if (ACPI_FAILURE(status)) {
/* On error, table_ptr was deallocated above */
return_ACPI_STATUS(status);
}
/* Store the ddb_handle into the Target operand */
status = acpi_ex_store(ddb_handle, target, walk_state);
if (ACPI_FAILURE(status)) {
(void)acpi_ex_unload_table(ddb_handle);
/* table_ptr was deallocated above */
return_ACPI_STATUS(status);
}
ACPI_INFO((AE_INFO,
"Dynamic SSDT Load - OemId [%6.6s] OemTableId [%8.8s]",
table_ptr->oem_id, table_ptr->oem_table_id));
cleanup:
if (ACPI_FAILURE(status)) {
ACPI_FREE(table_ptr);
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_unload_table
*
* PARAMETERS: ddb_handle - Handle to a previously loaded table
*
* RETURN: Status
*
* DESCRIPTION: Unload an ACPI table
*
******************************************************************************/
acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
{
acpi_status status = AE_OK;
union acpi_operand_object *table_desc = ddb_handle;
struct acpi_table_desc *table_info;
ACPI_FUNCTION_TRACE(ex_unload_table);
/*
* Validate the handle
* Although the handle is partially validated in acpi_ex_reconfiguration(),
* when it calls acpi_ex_resolve_operands(), the handle is more completely
* validated here.
*/
if ((!ddb_handle) ||
(ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
(ACPI_GET_OBJECT_TYPE(ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get the actual table descriptor from the ddb_handle */
table_info = (struct acpi_table_desc *)table_desc->reference.object;
/*
* Delete the entire namespace under this table Node
* (Offset contains the table_id)
*/
acpi_ns_delete_namespace_by_owner(table_info->owner_id);
/* Delete the table itself */
(void)acpi_tb_uninstall_table(table_info->installed_desc);
/* Delete the table descriptor (ddb_handle) */
acpi_ut_remove_reference(table_desc);
return_ACPI_STATUS(status);
}