linux/drivers/acpi/tables/tbxface.c
Robert Moore 0c9938cc75 [ACPI] ACPICA 20050729 from Bob Moore
Implemented support to ignore an attempt to install/load
a particular ACPI table more than once. Apparently there
exists BIOS code that repeatedly attempts to load the same
SSDT upon certain events. Thanks to Venkatesh Pallipadi.

Restructured the main interface to the AML parser in
order to correctly handle all exceptional conditions. This
will prevent leakage of the OwnerId resource and should
eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
machines. Thanks to Alexey Starikovskiy.

Support for "module level code" has been disabled in this
version due to a number of issues that have appeared
on various machines. The support can be enabled by
defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
compilation. When the issues are fully resolved, the code
will be enabled by default again.

Modified the internal functions for debug print support
to define the FunctionName parameter as a (const char *)
for compatibility with compiler built-in macros such as
__FUNCTION__, etc.

Linted the entire ACPICA source tree for both 32-bit
and 64-bit.

Signed-off-by: Robert Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-30 00:51:39 -04:00

454 lines
13 KiB
C

/******************************************************************************
*
* Module Name: tbxface - Public interfaces to the ACPI subsystem
* ACPI table oriented interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, 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 <linux/module.h>
#include <acpi/acpi.h>
#include <acpi/acnamesp.h>
#include <acpi/actables.h>
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbxface")
/*******************************************************************************
*
* FUNCTION: acpi_load_tables
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: This function is called to load the ACPI tables from the
* provided RSDT
*
******************************************************************************/
acpi_status
acpi_load_tables (
void)
{
struct acpi_pointer rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_load_tables");
/* Get the RSDP */
status = acpi_os_get_root_pointer (ACPI_LOGICAL_ADDRESSING,
&rsdp_address);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Could not get RSDP, %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Map and validate the RSDP */
acpi_gbl_table_flags = rsdp_address.pointer_type;
status = acpi_tb_verify_rsdp (&rsdp_address);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: RSDP Failed validation: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Get the RSDT via the RSDP */
status = acpi_tb_get_table_rsdt ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Could not load RSDT: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
/* Now get the tables needed by this subsystem (FADT, DSDT, etc.) */
status = acpi_tb_get_required_tables ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR ((
"acpi_load_tables: Error getting required tables (DSDT/FADT/FACS): %s\n",
acpi_format_exception (status)));
goto error_exit;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
/* Load the namespace from the tables */
status = acpi_ns_load_namespace ();
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("acpi_load_tables: Could not load namespace: %s\n",
acpi_format_exception (status)));
goto error_exit;
}
return_ACPI_STATUS (AE_OK);
error_exit:
ACPI_REPORT_ERROR (("acpi_load_tables: Could not load tables: %s\n",
acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_load_table
*
* PARAMETERS: table_ptr - pointer to a buffer containing the entire
* table to be loaded
*
* RETURN: Status
*
* DESCRIPTION: This function is called to load a table from the caller's
* buffer. The buffer must contain an entire ACPI Table including
* a valid header. The header fields will be verified, and if it
* is determined that the table is invalid, the call will fail.
*
******************************************************************************/
acpi_status
acpi_load_table (
struct acpi_table_header *table_ptr)
{
acpi_status status;
struct acpi_table_desc table_info;
struct acpi_pointer address;
ACPI_FUNCTION_TRACE ("acpi_load_table");
if (!table_ptr) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Copy the table to a local buffer */
address.pointer_type = ACPI_LOGICAL_POINTER | ACPI_LOGICAL_ADDRESSING;
address.pointer.logical = table_ptr;
status = acpi_tb_get_table_body (&address, table_ptr, &table_info);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Check signature for a valid table type */
status = acpi_tb_recognize_table (&table_info, ACPI_TABLE_ALL);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Install the new table into the local data structures */
status = acpi_tb_install_table (&table_info);
if (ACPI_FAILURE (status)) {
if (status == AE_ALREADY_EXISTS) {
/* Table already exists, no error */
status = AE_OK;
}
/* Free table allocated by acpi_tb_get_table_body */
acpi_tb_delete_single_table (&table_info);
return_ACPI_STATUS (status);
}
/* Convert the table to common format if necessary */
switch (table_info.type) {
case ACPI_TABLE_FADT:
status = acpi_tb_convert_table_fadt ();
break;
case ACPI_TABLE_FACS:
status = acpi_tb_build_common_facs (&table_info);
break;
default:
/* Load table into namespace if it contains executable AML */
status = acpi_ns_load_table (table_info.installed_desc, acpi_gbl_root_node);
break;
}
if (ACPI_FAILURE (status)) {
/* Uninstall table and free the buffer */
(void) acpi_tb_uninstall_table (table_info.installed_desc);
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_unload_table
*
* PARAMETERS: table_type - Type of table to be unloaded
*
* RETURN: Status
*
* DESCRIPTION: This routine is used to force the unload of a table
*
******************************************************************************/
acpi_status
acpi_unload_table (
acpi_table_type table_type)
{
struct acpi_table_desc *table_desc;
ACPI_FUNCTION_TRACE ("acpi_unload_table");
/* Parameter validation */
if (table_type > ACPI_TABLE_MAX) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Find all tables of the requested type */
table_desc = acpi_gbl_table_lists[table_type].next;
while (table_desc) {
/*
* Delete all namespace entries owned by this table. Note that these
* entries can appear anywhere in the namespace by virtue of the AML
* "Scope" operator. Thus, we need to track ownership by an ID, not
* simply a position within the hierarchy
*/
acpi_ns_delete_namespace_by_owner (table_desc->owner_id);
acpi_ut_release_owner_id (&table_desc->owner_id);
table_desc = table_desc->next;
}
/* Delete (or unmap) all tables of this type */
acpi_tb_delete_tables_by_type (table_type);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_get_table_header
*
* PARAMETERS: table_type - one of the defined table types
* Instance - the non zero instance of the table, allows
* support for multiple tables of the same type
* see acpi_gbl_acpi_table_flag
* out_table_header - pointer to the struct acpi_table_header if successful
*
* DESCRIPTION: This function is called to get an ACPI table header. The caller
* supplies an pointer to a data area sufficient to contain an ACPI
* struct acpi_table_header structure.
*
* The header contains a length field that can be used to determine
* the size of the buffer needed to contain the entire table. This
* function is not valid for the RSD PTR table since it does not
* have a standard header and is fixed length.
*
******************************************************************************/
acpi_status
acpi_get_table_header (
acpi_table_type table_type,
u32 instance,
struct acpi_table_header *out_table_header)
{
struct acpi_table_header *tbl_ptr;
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_get_table_header");
if ((instance == 0) ||
(table_type == ACPI_TABLE_RSDP) ||
(!out_table_header)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Check the table type and instance */
if ((table_type > ACPI_TABLE_MAX) ||
(ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags) &&
instance > 1)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get a pointer to the entire table */
status = acpi_tb_get_table_ptr (table_type, instance, &tbl_ptr);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* The function will return a NULL pointer if the table is not loaded */
if (tbl_ptr == NULL) {
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Copy the header to the caller's buffer */
ACPI_MEMCPY ((void *) out_table_header, (void *) tbl_ptr,
sizeof (struct acpi_table_header));
return_ACPI_STATUS (status);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_get_table
*
* PARAMETERS: table_type - one of the defined table types
* Instance - the non zero instance of the table, allows
* support for multiple tables of the same type
* see acpi_gbl_acpi_table_flag
* ret_buffer - pointer to a structure containing a buffer to
* receive the table
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get an ACPI table. The caller
* supplies an out_buffer large enough to contain the entire ACPI
* table. The caller should call the acpi_get_table_header function
* first to determine the buffer size needed. Upon completion
* the out_buffer->Length field will indicate the number of bytes
* copied into the out_buffer->buf_ptr buffer. This table will be
* a complete table including the header.
*
******************************************************************************/
acpi_status
acpi_get_table (
acpi_table_type table_type,
u32 instance,
struct acpi_buffer *ret_buffer)
{
struct acpi_table_header *tbl_ptr;
acpi_status status;
acpi_size table_length;
ACPI_FUNCTION_TRACE ("acpi_get_table");
/* Parameter validation */
if (instance == 0) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_ut_validate_buffer (ret_buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Check the table type and instance */
if ((table_type > ACPI_TABLE_MAX) ||
(ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags) &&
instance > 1)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get a pointer to the entire table */
status = acpi_tb_get_table_ptr (table_type, instance, &tbl_ptr);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* acpi_tb_get_table_ptr will return a NULL pointer if the
* table is not loaded.
*/
if (tbl_ptr == NULL) {
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Get the table length */
if (table_type == ACPI_TABLE_RSDP) {
/* RSD PTR is the only "table" without a header */
table_length = sizeof (struct rsdp_descriptor);
}
else {
table_length = (acpi_size) tbl_ptr->length;
}
/* Validate/Allocate/Clear caller buffer */
status = acpi_ut_initialize_buffer (ret_buffer, table_length);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Copy the table to the buffer */
ACPI_MEMCPY ((void *) ret_buffer->pointer, (void *) tbl_ptr, table_length);
return_ACPI_STATUS (AE_OK);
}
EXPORT_SYMBOL(acpi_get_table);