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linux/drivers/acpi/acpica/tbinstal.c
Lv Zheng a94e88cdd8 ACPICA: Tables: Avoid SSDT installation with acpi_gbl_disable_ssdt_table_load. 
It is reported that when acpi_gbl_disable_ssdt_table_load is specified, user
still can see it installed into /sys/firmware/acpi/tables on Linux boxes.
This is because the option only stops table "loading", but doesn't stop
table "installing", thus it is still in the acpi_gbl_root_table_list. With
previous cleanups, it is possible to prevent SSDT installations to make
it not such confusing.  The global variable is also renamed.  Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
[rjw: Subject]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-04-20 22:59:39 +02:00

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/******************************************************************************
*
* Module Name: tbinstal - ACPI table installation and removal
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2014, 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 "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbinstal")
/* Local prototypes */
static acpi_status
acpi_tb_acquire_temporal_table(struct acpi_table_desc *table_desc,
acpi_physical_address address, u8 flags);
static void acpi_tb_release_temporal_table(struct acpi_table_desc *table_desc);
static acpi_status acpi_tb_acquire_root_table_entry(u32 *table_index);
static u8
acpi_tb_is_equivalent_table(struct acpi_table_desc *table_desc,
u32 table_index);
/*******************************************************************************
*
* FUNCTION: acpi_tb_acquire_table
*
* PARAMETERS: table_desc - Table descriptor
* table_ptr - Where table is returned
* table_length - Where table length is returned
* table_flags - Where table allocation flags are returned
*
* RETURN: Status
*
* DESCRIPTION: Acquire a table. It can be used for tables not maintained in
* acpi_gbl_root_table_list.
*
******************************************************************************/
acpi_status
acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
struct acpi_table_header **table_ptr,
u32 *table_length, u8 *table_flags)
{
struct acpi_table_header *table = NULL;
switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
case ACPI_TABLE_ORIGIN_INTERN_PHYSICAL:
table =
acpi_os_map_memory(table_desc->address, table_desc->length);
break;
case ACPI_TABLE_ORIGIN_INTERN_VIRTUAL:
case ACPI_TABLE_ORIGIN_EXTERN_VIRTUAL:
table =
ACPI_CAST_PTR(struct acpi_table_header,
table_desc->address);
break;
default:
break;
}
/* Table is not valid yet */
if (!table) {
return (AE_NO_MEMORY);
}
/* Fill the return values */
*table_ptr = table;
*table_length = table_desc->length;
*table_flags = table_desc->flags;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_release_table
*
* PARAMETERS: table - Pointer for the table
* table_length - Length for the table
* table_flags - Allocation flags for the table
*
* RETURN: None
*
* DESCRIPTION: Release a table. The reversal of acpi_tb_acquire_table().
*
******************************************************************************/
void
acpi_tb_release_table(struct acpi_table_header *table,
u32 table_length, u8 table_flags)
{
switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
case ACPI_TABLE_ORIGIN_INTERN_PHYSICAL:
acpi_os_unmap_memory(table, table_length);
break;
case ACPI_TABLE_ORIGIN_INTERN_VIRTUAL:
case ACPI_TABLE_ORIGIN_EXTERN_VIRTUAL:
default:
break;
}
}
/******************************************************************************
*
* FUNCTION: acpi_tb_validate_table
*
* PARAMETERS: table_desc - Table descriptor
*
* RETURN: Status
*
* DESCRIPTION: This function is called to validate the table, the returned
* table descriptor is in "VALIDATED" state.
*
*****************************************************************************/
acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_validate_table);
/* Validate the table if necessary */
if (!table_desc->pointer) {
status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
&table_desc->length,
&table_desc->flags);
if (!table_desc->pointer) {
status = AE_NO_MEMORY;
}
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_invalidate_table
*
* PARAMETERS: table_desc - Table descriptor
*
* RETURN: None
*
* DESCRIPTION: Invalidate one internal ACPI table, this is reversal of
* acpi_tb_validate_table().
*
******************************************************************************/
void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
{
ACPI_FUNCTION_TRACE(tb_invalidate_table);
/* Table must be validated */
if (!table_desc->pointer) {
return_VOID;
}
acpi_tb_release_table(table_desc->pointer, table_desc->length,
table_desc->flags);
table_desc->pointer = NULL;
return_VOID;
}
/******************************************************************************
*
* FUNCTION: acpi_tb_verify_table
*
* PARAMETERS: table_desc - Table descriptor
* signature - Table signature to verify
*
* RETURN: Status
*
* DESCRIPTION: This function is called to validate and verify the table, the
* returned table descriptor is in "VALIDATED" state.
*
*****************************************************************************/
acpi_status
acpi_tb_verify_table(struct acpi_table_desc *table_desc, char *signature)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(tb_verify_table);
/* Validate the table */
status = acpi_tb_validate_table(table_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* If a particular signature is expected (DSDT/FACS), it must match */
if (signature && !ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
ACPI_BIOS_ERROR((AE_INFO,
"Invalid signature 0x%X for ACPI table, expected [%s]",
table_desc->signature.integer, signature));
status = AE_BAD_SIGNATURE;
goto invalidate_and_exit;
}
/* Verify the checksum */
status =
acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
"%4.4s " ACPI_PRINTF_UINT
" Attempted table install failed",
acpi_ut_valid_acpi_name(table_desc->signature.
ascii) ? table_desc->
signature.ascii : "????",
ACPI_FORMAT_TO_UINT(table_desc->address)));
goto invalidate_and_exit;
}
return_ACPI_STATUS(AE_OK);
invalidate_and_exit:
acpi_tb_invalidate_table(table_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_table
*
* PARAMETERS: table_desc - Table descriptor
* address - Physical address of the table
* flags - Allocation flags of the table
* table - Pointer to the table
*
* RETURN: None
*
* DESCRIPTION: Install an ACPI table into the global data structure.
*
******************************************************************************/
void
acpi_tb_install_table(struct acpi_table_desc *table_desc,
acpi_physical_address address,
u8 flags, struct acpi_table_header *table)
{
/*
* Initialize the table entry. Set the pointer to NULL, since the
* table is not fully mapped at this time.
*/
ACPI_MEMSET(table_desc, 0, sizeof(struct acpi_table_desc));
table_desc->address = address;
table_desc->length = table->length;
table_desc->flags = flags;
ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_acquire_temporal_table
*
* PARAMETERS: table_desc - Table descriptor to be acquired
* address - Address of the table
* flags - Allocation flags of the table
*
* RETURN: Status
*
* DESCRIPTION: This function validates the table header to obtain the length
* of a table and fills the table descriptor to make its state as
* "INSTALLED". Such table descriptor is only used for verified
* installation.
*
******************************************************************************/
static acpi_status
acpi_tb_acquire_temporal_table(struct acpi_table_desc *table_desc,
acpi_physical_address address, u8 flags)
{
struct acpi_table_header *table_header;
switch (flags & ACPI_TABLE_ORIGIN_MASK) {
case ACPI_TABLE_ORIGIN_INTERN_PHYSICAL:
/* Try to obtain the length of the table */
table_header =
acpi_os_map_memory(address,
sizeof(struct acpi_table_header));
if (!table_header) {
return (AE_NO_MEMORY);
}
acpi_tb_install_table(table_desc, address, flags, table_header);
acpi_os_unmap_memory(table_header,
sizeof(struct acpi_table_header));
return (AE_OK);
case ACPI_TABLE_ORIGIN_INTERN_VIRTUAL:
case ACPI_TABLE_ORIGIN_EXTERN_VIRTUAL:
table_header = ACPI_CAST_PTR(struct acpi_table_header, address);
if (!table_header) {
return (AE_NO_MEMORY);
}
acpi_tb_install_table(table_desc, address, flags, table_header);
return (AE_OK);
default:
break;
}
/* Table is not valid yet */
return (AE_NO_MEMORY);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_release_temporal_table
*
* PARAMETERS: table_desc - Table descriptor to be released
*
* RETURN: Status
*
* DESCRIPTION: The reversal of acpi_tb_acquire_temporal_table().
*
******************************************************************************/
static void acpi_tb_release_temporal_table(struct acpi_table_desc *table_desc)
{
/*
* Note that the .Address is maintained by the callers of
* acpi_tb_acquire_temporal_table(), thus do not invoke acpi_tb_uninstall_table()
* where .Address will be freed.
*/
acpi_tb_invalidate_table(table_desc);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_and_override_table
*
* PARAMETERS: table_index - Index into root table array
* new_table_desc - New table descriptor to install
*
* RETURN: None
*
* DESCRIPTION: Install an ACPI table into the global data structure. The
* table override mechanism is called to allow the host
* OS to replace any table before it is installed in the root
* table array.
*
******************************************************************************/
void
acpi_tb_install_and_override_table(u32 table_index,
struct acpi_table_desc *new_table_desc)
{
if (table_index >= acpi_gbl_root_table_list.current_table_count) {
return;
}
/*
* ACPI Table Override:
*
* Before we install the table, let the host OS override it with a new
* one if desired. Any table within the RSDT/XSDT can be replaced,
* including the DSDT which is pointed to by the FADT.
*/
acpi_tb_override_table(new_table_desc);
acpi_tb_install_table(&acpi_gbl_root_table_list.tables[table_index],
new_table_desc->address, new_table_desc->flags,
new_table_desc->pointer);
acpi_tb_print_table_header(new_table_desc->address,
new_table_desc->pointer);
/* Set the global integer width (based upon revision of the DSDT) */
if (table_index == ACPI_TABLE_INDEX_DSDT) {
acpi_ut_set_integer_width(new_table_desc->pointer->revision);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_fixed_table
*
* PARAMETERS: address - Physical address of DSDT or FACS
* signature - Table signature, NULL if no need to
* match
* table_index - Index into root table array
*
* RETURN: Status
*
* DESCRIPTION: Install a fixed ACPI table (DSDT/FACS) into the global data
* structure.
*
******************************************************************************/
acpi_status
acpi_tb_install_fixed_table(acpi_physical_address address,
char *signature, u32 table_index)
{
struct acpi_table_desc new_table_desc;
acpi_status status;
ACPI_FUNCTION_TRACE(tb_install_fixed_table);
if (!address) {
ACPI_ERROR((AE_INFO,
"Null physical address for ACPI table [%s]",
signature));
return (AE_NO_MEMORY);
}
/* Fill a table descriptor for validation */
status = acpi_tb_acquire_temporal_table(&new_table_desc, address,
ACPI_TABLE_ORIGIN_INTERN_PHYSICAL);
if (ACPI_FAILURE(status)) {
ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
ACPI_CAST_PTR(void, address)));
return_ACPI_STATUS(status);
}
/* Validate and verify a table before installation */
status = acpi_tb_verify_table(&new_table_desc, signature);
if (ACPI_FAILURE(status)) {
goto release_and_exit;
}
acpi_tb_install_and_override_table(table_index, &new_table_desc);
release_and_exit:
/* Release the temporal table descriptor */
acpi_tb_release_temporal_table(&new_table_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_is_equivalent_table
*
* PARAMETERS: table_desc - Table 1 descriptor to be compared
* table_index - Index of table 2 to be compared
*
* RETURN: TRUE if 2 tables are equivalent
*
* DESCRIPTION: This function is called to compare a table with what have
* already been installed in the root table list.
*
******************************************************************************/
static u8
acpi_tb_is_equivalent_table(struct acpi_table_desc *table_desc, u32 table_index)
{
acpi_status status = AE_OK;
u8 is_equivalent;
struct acpi_table_header *table;
u32 table_length;
u8 table_flags;
status =
acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
&table, &table_length, &table_flags);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
is_equivalent = (u8)((table_desc->length != table_length ||
ACPI_MEMCMP(table_desc->pointer, table,
table_length)) ? FALSE : TRUE);
/* Release the acquired table */
acpi_tb_release_table(table, table_length, table_flags);
return (is_equivalent);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_non_fixed_table
*
* PARAMETERS: address - Address of the table (might be a virtual
* address depending on the table_flags)
* flags - Flags for the table
* reload - Whether reload should be performed
* table_index - Where the table index is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to install an ACPI table that is
* neither DSDT nor FACS.
* When this function is called by "Load" or "LoadTable" opcodes,
* or by acpi_load_table() API, the "Reload" parameter is set.
* After sucessfully returning from this function, table is
* "INSTALLED" but not "VALIDATED".
*
******************************************************************************/
acpi_status
acpi_tb_install_non_fixed_table(acpi_physical_address address,
u8 flags, u8 reload, u32 *table_index)
{
u32 i;
acpi_status status = AE_OK;
struct acpi_table_desc new_table_desc;
ACPI_FUNCTION_TRACE(tb_install_non_fixed_table);
/* Acquire a temporal table descriptor for validation */
status =
acpi_tb_acquire_temporal_table(&new_table_desc, address, flags);
if (ACPI_FAILURE(status)) {
ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
ACPI_CAST_PTR(void, address)));
return_ACPI_STATUS(status);
}
/*
* Optionally do not load any SSDTs from the RSDT/XSDT. This can
* be useful for debugging ACPI problems on some machines.
*/
if (!reload && acpi_gbl_disable_ssdt_table_install &&
ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) {
ACPI_INFO((AE_INFO, "Ignoring installation of %4.4s at %p",
new_table_desc.signature.ascii, ACPI_CAST_PTR(void,
address)));
goto release_and_exit;
}
/* Validate and verify a table before installation */
status = acpi_tb_verify_table(&new_table_desc, NULL);
if (ACPI_FAILURE(status)) {
goto release_and_exit;
}
if (reload) {
/*
* Validate the incoming table signature.
*
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
* 2) We added support for OEMx tables, signature "OEM".
* 3) Valid tables were encountered with a null signature, so we just
* gave up on validating the signature, (05/2008).
* 4) We encountered non-AML tables such as the MADT, which caused
* interpreter errors and kernel faults. So now, we once again allow
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
if ((new_table_desc.signature.ascii[0] != 0x00) &&
(!ACPI_COMPARE_NAME
(&new_table_desc.signature, ACPI_SIG_SSDT))
&& (ACPI_STRNCMP(new_table_desc.signature.ascii, "OEM", 3)))
{
ACPI_BIOS_ERROR((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), "
"must be SSDT or OEMx",
acpi_ut_valid_acpi_name(new_table_desc.
signature.
ascii) ?
new_table_desc.signature.
ascii : "????",
new_table_desc.signature.integer));
status = AE_BAD_SIGNATURE;
goto release_and_exit;
}
/* Check if table is already registered */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count;
++i) {
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (!acpi_tb_is_equivalent_table(&new_table_desc, i)) {
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
if (acpi_gbl_root_table_list.tables[i].
flags & ACPI_TABLE_IS_LOADED) {
/* Table is still loaded, this is an error */
status = AE_ALREADY_EXISTS;
goto release_and_exit;
} else {
/*
* Table was unloaded, allow it to be reloaded.
* As we are going to return AE_OK to the caller, we should
* take the responsibility of freeing the input descriptor.
* Refill the input descriptor to ensure
* acpi_tb_install_and_override_table() can be called again to
* indicate the re-installation.
*/
acpi_tb_uninstall_table(&new_table_desc);
*table_index = i;
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(AE_OK);
}
}
}
/* Add the table to the global root table list */
status = acpi_tb_acquire_root_table_entry(&i);
if (ACPI_FAILURE(status)) {
goto release_and_exit;
}
*table_index = i;
acpi_tb_install_and_override_table(i, &new_table_desc);
release_and_exit:
/* Release the temporal table descriptor */
acpi_tb_release_temporal_table(&new_table_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_override_table
*
* PARAMETERS: old_table_desc - Validated table descriptor to be
* overridden
*
* RETURN: None
*
* DESCRIPTION: Attempt table override by calling the OSL override functions.
* Note: If the table is overridden, then the entire new table
* is acquired and returned by this function.
* Before/after invocation, the table descriptor is in a state
* that is "VALIDATED".
*
******************************************************************************/
void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
{
acpi_status status;
char *override_type;
struct acpi_table_desc new_table_desc;
struct acpi_table_header *table;
acpi_physical_address address;
u32 length;
/* (1) Attempt logical override (returns a logical address) */
status = acpi_os_table_override(old_table_desc->pointer, &table);
if (ACPI_SUCCESS(status) && table) {
acpi_tb_acquire_temporal_table(&new_table_desc,
ACPI_PTR_TO_PHYSADDR(table),
ACPI_TABLE_ORIGIN_EXTERN_VIRTUAL);
override_type = "Logical";
goto finish_override;
}
/* (2) Attempt physical override (returns a physical address) */
status = acpi_os_physical_table_override(old_table_desc->pointer,
&address, &length);
if (ACPI_SUCCESS(status) && address && length) {
acpi_tb_acquire_temporal_table(&new_table_desc, address,
ACPI_TABLE_ORIGIN_INTERN_PHYSICAL);
override_type = "Physical";
goto finish_override;
}
return; /* There was no override */
finish_override:
/* Validate and verify a table before overriding */
status = acpi_tb_verify_table(&new_table_desc, NULL);
if (ACPI_FAILURE(status)) {
return;
}
ACPI_INFO((AE_INFO, "%4.4s " ACPI_PRINTF_UINT
" %s table override, new table: " ACPI_PRINTF_UINT,
old_table_desc->signature.ascii,
ACPI_FORMAT_TO_UINT(old_table_desc->address),
override_type, ACPI_FORMAT_TO_UINT(new_table_desc.address)));
/* We can now uninstall the original table */
acpi_tb_uninstall_table(old_table_desc);
/*
* Replace the original table descriptor and keep its state as
* "VALIDATED".
*/
acpi_tb_install_table(old_table_desc, new_table_desc.address,
new_table_desc.flags, new_table_desc.pointer);
acpi_tb_validate_table(old_table_desc);
/* Release the temporal table descriptor */
acpi_tb_release_temporal_table(&new_table_desc);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_resize_root_table_list
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Expand the size of global table array
*
******************************************************************************/
acpi_status acpi_tb_resize_root_table_list(void)
{
struct acpi_table_desc *tables;
u32 table_count;
ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
/* allow_resize flag is a parameter to acpi_initialize_tables */
if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
ACPI_ERROR((AE_INFO,
"Resize of Root Table Array is not allowed"));
return_ACPI_STATUS(AE_SUPPORT);
}
/* Increase the Table Array size */
if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
table_count = acpi_gbl_root_table_list.max_table_count;
} else {
table_count = acpi_gbl_root_table_list.current_table_count;
}
tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
ACPI_ROOT_TABLE_SIZE_INCREMENT) *
sizeof(struct acpi_table_desc));
if (!tables) {
ACPI_ERROR((AE_INFO,
"Could not allocate new root table array"));
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Copy and free the previous table array */
if (acpi_gbl_root_table_list.tables) {
ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
(acpi_size) table_count *
sizeof(struct acpi_table_desc));
if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
ACPI_FREE(acpi_gbl_root_table_list.tables);
}
}
acpi_gbl_root_table_list.tables = tables;
acpi_gbl_root_table_list.max_table_count =
table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_acquire_root_table_entry
*
* PARAMETERS: table_index - Where table index is returned
*
* RETURN: Status and table index.
*
* DESCRIPTION: Allocate a new ACPI table entry to the global table list
*
******************************************************************************/
static acpi_status acpi_tb_acquire_root_table_entry(u32 *table_index)
{
acpi_status status;
/* Ensure that there is room for the table in the Root Table List */
if (acpi_gbl_root_table_list.current_table_count >=
acpi_gbl_root_table_list.max_table_count) {
status = acpi_tb_resize_root_table_list();
if (ACPI_FAILURE(status)) {
return (status);
}
}
*table_index = acpi_gbl_root_table_list.current_table_count;
acpi_gbl_root_table_list.current_table_count++;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_store_table
*
* PARAMETERS: address - Table address
* table - Table header
* length - Table length
* flags - flags
*
* RETURN: Status and table index.
*
* DESCRIPTION: Add an ACPI table to the global table list
*
******************************************************************************/
acpi_status
acpi_tb_store_table(acpi_physical_address address,
struct acpi_table_header * table,
u32 length, u8 flags, u32 *table_index)
{
acpi_status status;
struct acpi_table_desc *table_desc;
status = acpi_tb_acquire_root_table_entry(table_index);
if (ACPI_FAILURE(status)) {
return (status);
}
/* Initialize added table */
table_desc = &acpi_gbl_root_table_list.tables[*table_index];
acpi_tb_install_table(table_desc, address, flags, table);
table_desc->pointer = table;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_uninstall_table
*
* PARAMETERS: table_desc - Table descriptor
*
* RETURN: None
*
* DESCRIPTION: Delete one internal ACPI table
*
******************************************************************************/
void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
{
ACPI_FUNCTION_TRACE(tb_uninstall_table);
/* Table must be installed */
if (!table_desc->address) {
return_VOID;
}
acpi_tb_invalidate_table(table_desc);
if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_INTERN_VIRTUAL) {
ACPI_FREE(ACPI_CAST_PTR(void, table_desc->address));
}
table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_terminate
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Delete all internal ACPI tables
*
******************************************************************************/
void acpi_tb_terminate(void)
{
u32 i;
ACPI_FUNCTION_TRACE(tb_terminate);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Delete the individual tables */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
}
/*
* Delete the root table array if allocated locally. Array cannot be
* mapped, so we don't need to check for that flag.
*/
if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
ACPI_FREE(acpi_gbl_root_table_list.tables);
}
acpi_gbl_root_table_list.tables = NULL;
acpi_gbl_root_table_list.flags = 0;
acpi_gbl_root_table_list.current_table_count = 0;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_namespace_by_owner
*
* PARAMETERS: table_index - Table index
*
* RETURN: Status
*
* DESCRIPTION: Delete all namespace objects created when this table was loaded.
*
******************************************************************************/
acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
{
acpi_owner_id owner_id;
acpi_status status;
ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
if (table_index >= acpi_gbl_root_table_list.current_table_count) {
/* The table index does not exist */
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Get the owner ID for this table, used to delete namespace nodes */
owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
/*
* Need to acquire the namespace writer lock to prevent interference
* with any concurrent namespace walks. The interpreter must be
* released during the deletion since the acquisition of the deletion
* lock may block, and also since the execution of a namespace walk
* must be allowed to use the interpreter.
*/
(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
acpi_ns_delete_namespace_by_owner(owner_id);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_allocate_owner_id
*
* PARAMETERS: table_index - Table index
*
* RETURN: Status
*
* DESCRIPTION: Allocates owner_id in table_desc
*
******************************************************************************/
acpi_status acpi_tb_allocate_owner_id(u32 table_index)
{
acpi_status status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (table_index < acpi_gbl_root_table_list.current_table_count) {
status = acpi_ut_allocate_owner_id
(&(acpi_gbl_root_table_list.tables[table_index].owner_id));
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_release_owner_id
*
* PARAMETERS: table_index - Table index
*
* RETURN: Status
*
* DESCRIPTION: Releases owner_id in table_desc
*
******************************************************************************/
acpi_status acpi_tb_release_owner_id(u32 table_index)
{
acpi_status status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE(tb_release_owner_id);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (table_index < acpi_gbl_root_table_list.current_table_count) {
acpi_ut_release_owner_id(&
(acpi_gbl_root_table_list.
tables[table_index].owner_id));
status = AE_OK;
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_get_owner_id
*
* PARAMETERS: table_index - Table index
* owner_id - Where the table owner_id is returned
*
* RETURN: Status
*
* DESCRIPTION: returns owner_id for the ACPI table
*
******************************************************************************/
acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id * owner_id)
{
acpi_status status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE(tb_get_owner_id);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (table_index < acpi_gbl_root_table_list.current_table_count) {
*owner_id =
acpi_gbl_root_table_list.tables[table_index].owner_id;
status = AE_OK;
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_is_table_loaded
*
* PARAMETERS: table_index - Table index
*
* RETURN: Table Loaded Flag
*
******************************************************************************/
u8 acpi_tb_is_table_loaded(u32 table_index)
{
u8 is_loaded = FALSE;
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (table_index < acpi_gbl_root_table_list.current_table_count) {
is_loaded = (u8)
(acpi_gbl_root_table_list.tables[table_index].flags &
ACPI_TABLE_IS_LOADED);
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return (is_loaded);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_set_table_loaded_flag
*
* PARAMETERS: table_index - Table index
* is_loaded - TRUE if table is loaded, FALSE otherwise
*
* RETURN: None
*
* DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
*
******************************************************************************/
void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
{
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
if (table_index < acpi_gbl_root_table_list.current_table_count) {
if (is_loaded) {
acpi_gbl_root_table_list.tables[table_index].flags |=
ACPI_TABLE_IS_LOADED;
} else {
acpi_gbl_root_table_list.tables[table_index].flags &=
~ACPI_TABLE_IS_LOADED;
}
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
}
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