linux/drivers/acpi/tables/tbinstal.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

551 lines
15 KiB
C

/******************************************************************************
*
* Module Name: tbinstal - ACPI table installation and removal
*
*****************************************************************************/
/*
* 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/actables.h>
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbinstal")
/* Local prototypes */
static acpi_status
acpi_tb_match_signature(char *signature,
struct acpi_table_desc *table_info, u8 search_type);
/*******************************************************************************
*
* FUNCTION: acpi_tb_match_signature
*
* PARAMETERS: Signature - Table signature to match
* table_info - Return data
* search_type - Table type to match (primary/secondary)
*
* RETURN: Status
*
* DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned"
* tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match.
*
******************************************************************************/
static acpi_status
acpi_tb_match_signature(char *signature,
struct acpi_table_desc *table_info, u8 search_type)
{
acpi_native_uint i;
ACPI_FUNCTION_TRACE(tb_match_signature);
/* Search for a signature match among the known table types */
for (i = 0; i < (ACPI_TABLE_ID_MAX + 1); i++) {
if (!(acpi_gbl_table_data[i].flags & search_type)) {
continue;
}
if (!ACPI_STRNCMP(signature, acpi_gbl_table_data[i].signature,
acpi_gbl_table_data[i].sig_length)) {
/* Found a signature match, return index if requested */
if (table_info) {
table_info->type = (u8) i;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Table [%4.4s] is an ACPI table consumed by the core subsystem\n",
(char *)acpi_gbl_table_data[i].
signature));
return_ACPI_STATUS(AE_OK);
}
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n",
(char *)signature));
return_ACPI_STATUS(AE_TABLE_NOT_SUPPORTED);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_table
*
* PARAMETERS: table_info - Return value from acpi_tb_get_table_body
*
* RETURN: Status
*
* DESCRIPTION: Install the table into the global data structures.
*
******************************************************************************/
acpi_status acpi_tb_install_table(struct acpi_table_desc *table_info)
{
acpi_status status;
ACPI_FUNCTION_TRACE(tb_install_table);
/* Lock tables while installing */
status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not acquire table mutex"));
return_ACPI_STATUS(status);
}
/*
* Ignore a table that is already installed. For example, some BIOS
* ASL code will repeatedly attempt to load the same SSDT.
*/
status = acpi_tb_is_table_installed(table_info);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/* Install the table into the global data structure */
status = acpi_tb_init_table_descriptor(table_info->type, table_info);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not install table [%4.4s]",
table_info->pointer->signature));
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s located at %p\n",
acpi_gbl_table_data[table_info->type].name,
table_info->pointer));
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_recognize_table
*
* PARAMETERS: table_info - Return value from acpi_tb_get_table_body
* search_type - Table type to match (primary/secondary)
*
* RETURN: Status
*
* DESCRIPTION: Check a table signature for a match against known table types
*
* NOTE: All table pointers are validated as follows:
* 1) Table pointer must point to valid physical memory
* 2) Signature must be 4 ASCII chars, even if we don't recognize the
* name
* 3) Table must be readable for length specified in the header
* 4) Table checksum must be valid (with the exception of the FACS
* which has no checksum for some odd reason)
*
******************************************************************************/
acpi_status
acpi_tb_recognize_table(struct acpi_table_desc *table_info, u8 search_type)
{
struct acpi_table_header *table_header;
acpi_status status;
ACPI_FUNCTION_TRACE(tb_recognize_table);
/* Ensure that we have a valid table pointer */
table_header = (struct acpi_table_header *)table_info->pointer;
if (!table_header) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* We only "recognize" a limited number of ACPI tables -- namely, the
* ones that are used by the subsystem (DSDT, FADT, etc.)
*
* An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
* This can be any one of many valid ACPI tables, it just isn't one of
* the tables that is consumed by the core subsystem
*/
status = acpi_tb_match_signature(table_header->signature,
table_info, search_type);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_tb_validate_table_header(table_header);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Return the table type and length via the info struct */
table_info->length = (acpi_size) table_header->length;
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_init_table_descriptor
*
* PARAMETERS: table_type - The type of the table
* table_info - A table info struct
*
* RETURN: None.
*
* DESCRIPTION: Install a table into the global data structs.
*
******************************************************************************/
acpi_status
acpi_tb_init_table_descriptor(acpi_table_type table_type,
struct acpi_table_desc *table_info)
{
struct acpi_table_list *list_head;
struct acpi_table_desc *table_desc;
acpi_status status;
ACPI_FUNCTION_TRACE_U32(tb_init_table_descriptor, table_type);
/* Allocate a descriptor for this table */
table_desc = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_table_desc));
if (!table_desc) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Get a new owner ID for the table */
status = acpi_ut_allocate_owner_id(&table_desc->owner_id);
if (ACPI_FAILURE(status)) {
goto error_exit1;
}
/* Install the table into the global data structure */
list_head = &acpi_gbl_table_lists[table_type];
/*
* Two major types of tables: 1) Only one instance is allowed. This
* includes most ACPI tables such as the DSDT. 2) Multiple instances of
* the table are allowed. This includes SSDT and PSDTs.
*/
if (ACPI_IS_SINGLE_TABLE(acpi_gbl_table_data[table_type].flags)) {
/*
* Only one table allowed, and a table has alread been installed
* at this location, so return an error.
*/
if (list_head->next) {
status = AE_ALREADY_EXISTS;
goto error_exit2;
}
table_desc->next = list_head->next;
list_head->next = table_desc;
if (table_desc->next) {
table_desc->next->prev = table_desc;
}
list_head->count++;
} else {
/*
* Link the new table in to the list of tables of this type.
* Insert at the end of the list, order IS IMPORTANT.
*
* table_desc->Prev & Next are already NULL from calloc()
*/
list_head->count++;
if (!list_head->next) {
list_head->next = table_desc;
} else {
table_desc->next = list_head->next;
while (table_desc->next->next) {
table_desc->next = table_desc->next->next;
}
table_desc->next->next = table_desc;
table_desc->prev = table_desc->next;
table_desc->next = NULL;
}
}
/* Finish initialization of the table descriptor */
table_desc->loaded_into_namespace = FALSE;
table_desc->type = (u8) table_type;
table_desc->pointer = table_info->pointer;
table_desc->length = table_info->length;
table_desc->allocation = table_info->allocation;
table_desc->aml_start = (u8 *) (table_desc->pointer + 1),
table_desc->aml_length = (u32)
(table_desc->length - (u32) sizeof(struct acpi_table_header));
/*
* Set the appropriate global pointer (if there is one) to point to the
* newly installed table
*/
if (acpi_gbl_table_data[table_type].global_ptr) {
*(acpi_gbl_table_data[table_type].global_ptr) =
table_info->pointer;
}
/* Return Data */
table_info->owner_id = table_desc->owner_id;
table_info->installed_desc = table_desc;
return_ACPI_STATUS(AE_OK);
/* Error exit with cleanup */
error_exit2:
acpi_ut_release_owner_id(&table_desc->owner_id);
error_exit1:
ACPI_FREE(table_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_all_tables
*
* PARAMETERS: None.
*
* RETURN: None.
*
* DESCRIPTION: Delete all internal ACPI tables
*
******************************************************************************/
void acpi_tb_delete_all_tables(void)
{
acpi_table_type type;
/*
* Free memory allocated for ACPI tables
* Memory can either be mapped or allocated
*/
for (type = 0; type < (ACPI_TABLE_ID_MAX + 1); type++) {
acpi_tb_delete_tables_by_type(type);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_tables_by_type
*
* PARAMETERS: Type - The table type to be deleted
*
* RETURN: None.
*
* DESCRIPTION: Delete an internal ACPI table
* Locks the ACPI table mutex
*
******************************************************************************/
void acpi_tb_delete_tables_by_type(acpi_table_type type)
{
struct acpi_table_desc *table_desc;
u32 count;
u32 i;
ACPI_FUNCTION_TRACE_U32(tb_delete_tables_by_type, type);
if (type > ACPI_TABLE_ID_MAX) {
return_VOID;
}
if (ACPI_FAILURE(acpi_ut_acquire_mutex(ACPI_MTX_TABLES))) {
return;
}
/* Clear the appropriate "typed" global table pointer */
switch (type) {
case ACPI_TABLE_ID_RSDP:
acpi_gbl_RSDP = NULL;
break;
case ACPI_TABLE_ID_DSDT:
acpi_gbl_DSDT = NULL;
break;
case ACPI_TABLE_ID_FADT:
acpi_gbl_FADT = NULL;
break;
case ACPI_TABLE_ID_FACS:
acpi_gbl_FACS = NULL;
break;
case ACPI_TABLE_ID_XSDT:
acpi_gbl_XSDT = NULL;
break;
case ACPI_TABLE_ID_SSDT:
case ACPI_TABLE_ID_PSDT:
default:
break;
}
/*
* Free the table
* 1) Get the head of the list
*/
table_desc = acpi_gbl_table_lists[type].next;
count = acpi_gbl_table_lists[type].count;
/*
* 2) Walk the entire list, deleting both the allocated tables
* and the table descriptors
*/
for (i = 0; i < count; i++) {
table_desc = acpi_tb_uninstall_table(table_desc);
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_single_table
*
* PARAMETERS: table_info - A table info struct
*
* RETURN: None.
*
* DESCRIPTION: Low-level free for a single ACPI table. Handles cases where
* the table was allocated a buffer or was mapped.
*
******************************************************************************/
void acpi_tb_delete_single_table(struct acpi_table_desc *table_desc)
{
/* Must have a valid table descriptor and pointer */
if ((!table_desc) || (!table_desc->pointer)) {
return;
}
/* Valid table, determine type of memory allocation */
switch (table_desc->allocation) {
case ACPI_MEM_NOT_ALLOCATED:
break;
case ACPI_MEM_ALLOCATED:
ACPI_FREE(table_desc->pointer);
break;
case ACPI_MEM_MAPPED:
acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
break;
default:
break;
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_uninstall_table
*
* PARAMETERS: table_info - A table info struct
*
* RETURN: Pointer to the next table in the list (of same type)
*
* DESCRIPTION: Free the memory associated with an internal ACPI table that
* is either installed or has never been installed.
* Table mutex should be locked.
*
******************************************************************************/
struct acpi_table_desc *acpi_tb_uninstall_table(struct acpi_table_desc
*table_desc)
{
struct acpi_table_desc *next_desc;
ACPI_FUNCTION_TRACE_PTR(tb_uninstall_table, table_desc);
if (!table_desc) {
return_PTR(NULL);
}
/* Unlink the descriptor from the doubly linked list */
if (table_desc->prev) {
table_desc->prev->next = table_desc->next;
} else {
/* Is first on list, update list head */
acpi_gbl_table_lists[table_desc->type].next = table_desc->next;
}
if (table_desc->next) {
table_desc->next->prev = table_desc->prev;
}
/* Free the memory allocated for the table itself */
acpi_tb_delete_single_table(table_desc);
/* Free the owner ID associated with this table */
acpi_ut_release_owner_id(&table_desc->owner_id);
/* Free the table descriptor */
next_desc = table_desc->next;
ACPI_FREE(table_desc);
/* Return pointer to the next descriptor */
return_PTR(next_desc);
}