f9f4601f33
The use of the CPU stack in the debug version of the subsystem has been considerably reduced. Previously, a debug structure was declared in every function that used the debug macros. This structure has been removed in favor of declaring the individual elements as parameters to the debug functions. This reduces the cumulative stack use during nested execution of ACPI function calls at the cost of a small increase in the code size of the debug version of the subsystem. With assistance from Alexey Starikovskiy and Len Brown. Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent headers to define a macro that will return the current function name at runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent header, the function name is saved on the CPU stack (one pointer per function.) This mechanism is used because apparently there exists no standard ANSI-C defined macro that that returns the function name. Alexey Starikovskiy redesigned and reimplemented the "Owner ID" mechanism used to track namespace objects created/deleted by ACPI tables and control method execution. A bitmap is now used to allocate and free the IDs, thus solving the wraparound problem present in the previous implementation. The size of the namespace node descriptor was reduced by 2 bytes as a result. Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield flag definitions within the headers for the predefined ACPI tables. These have been replaced by UINT8_BIT in order to increase the code portability of the subsystem. If the use of UINT8 remains a problem, we may be forced to eliminate bitfields entirely because of a lack of portability. Alexey Starikovksiy enhanced the performance of acpi_ut_update_object_reference. This is a frequently used function and this improvement increases the performance of the entire subsystem. Alexey Starikovskiy fixed several possible memory leaks and the inverse - premature object deletion. Signed-off-by: Len Brown <len.brown@intel.com>
441 lines
13 KiB
C
441 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);
|
|
}
|
|
|
|
/* Install the new table into the local data structures */
|
|
|
|
status = acpi_tb_install_table (&table_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
/* 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);
|
|
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);
|
|
|