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Designed and implemented new external interfaces to install and remove handlers for ACPI table-related events. Current events that are defined are LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as they are dynamically loaded and unloaded. See AcpiInstallTableHandler and AcpiRemoveTableHandler. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
737 lines
21 KiB
C
737 lines
21 KiB
C
/******************************************************************************
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*
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* Module Name: tbxface - Public interfaces to the ACPI subsystem
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* ACPI table oriented interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2007, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/actables.h>
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbxface")
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/* Local prototypes */
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static acpi_status acpi_tb_load_namespace(void);
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static int no_auto_ssdt;
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/*******************************************************************************
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*
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* FUNCTION: acpi_allocate_root_table
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*
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* PARAMETERS: initial_table_count - Size of initial_table_array, in number of
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* struct acpi_table_desc structures
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*
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* RETURN: Status
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*
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* DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and
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* acpi_initialize_tables.
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*
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******************************************************************************/
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acpi_status acpi_allocate_root_table(u32 initial_table_count)
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{
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acpi_gbl_root_table_list.size = initial_table_count;
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acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE;
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return (acpi_tb_resize_root_table_list());
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_initialize_tables
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*
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* PARAMETERS: initial_table_array - Pointer to an array of pre-allocated
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* struct acpi_table_desc structures. If NULL, the
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* array is dynamically allocated.
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* initial_table_count - Size of initial_table_array, in number of
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* struct acpi_table_desc structures
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* allow_realloc - Flag to tell Table Manager if resize of
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* pre-allocated array is allowed. Ignored
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* if initial_table_array is NULL.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
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*
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* NOTE: Allows static allocation of the initial table array in order
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* to avoid the use of dynamic memory in confined environments
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* such as the kernel boot sequence where it may not be available.
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*
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* If the host OS memory managers are initialized, use NULL for
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* initial_table_array, and the table will be dynamically allocated.
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*
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******************************************************************************/
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acpi_status __init
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acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
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u32 initial_table_count, u8 allow_resize)
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{
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acpi_physical_address rsdp_address;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_initialize_tables);
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/*
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* Set up the Root Table Array
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* Allocate the table array if requested
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*/
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if (!initial_table_array) {
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status = acpi_allocate_root_table(initial_table_count);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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} else {
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/* Root Table Array has been statically allocated by the host */
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ACPI_MEMSET(initial_table_array, 0,
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initial_table_count *
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sizeof(struct acpi_table_desc));
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acpi_gbl_root_table_list.tables = initial_table_array;
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acpi_gbl_root_table_list.size = initial_table_count;
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acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
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if (allow_resize) {
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acpi_gbl_root_table_list.flags |=
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ACPI_ROOT_ALLOW_RESIZE;
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}
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}
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/* Get the address of the RSDP */
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rsdp_address = acpi_os_get_root_pointer();
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if (!rsdp_address) {
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return_ACPI_STATUS(AE_NOT_FOUND);
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}
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/*
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* Get the root table (RSDT or XSDT) and extract all entries to the local
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* Root Table Array. This array contains the information of the RSDT/XSDT
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* in a common, more useable format.
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*/
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status =
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acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_reallocate_root_table
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
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* root list from the previously provided scratch area. Should
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* be called once dynamic memory allocation is available in the
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* kernel
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*
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******************************************************************************/
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acpi_status acpi_reallocate_root_table(void)
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{
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struct acpi_table_desc *tables;
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acpi_size new_size;
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ACPI_FUNCTION_TRACE(acpi_reallocate_root_table);
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/*
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* Only reallocate the root table if the host provided a static buffer
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* for the table array in the call to acpi_initialize_tables.
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*/
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if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
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return_ACPI_STATUS(AE_SUPPORT);
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}
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new_size =
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(acpi_gbl_root_table_list.count +
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ACPI_ROOT_TABLE_SIZE_INCREMENT) * sizeof(struct acpi_table_desc);
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/* Create new array and copy the old array */
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tables = ACPI_ALLOCATE_ZEROED(new_size);
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if (!tables) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size);
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acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count;
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acpi_gbl_root_table_list.tables = tables;
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acpi_gbl_root_table_list.flags =
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ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_load_table
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*
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* PARAMETERS: table_ptr - pointer to a buffer containing the entire
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* table to be loaded
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to load a table from the caller's
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* buffer. The buffer must contain an entire ACPI Table including
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* a valid header. The header fields will be verified, and if it
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* is determined that the table is invalid, the call will fail.
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*
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******************************************************************************/
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acpi_status acpi_load_table(struct acpi_table_header *table_ptr)
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{
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acpi_status status;
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acpi_native_uint table_index;
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struct acpi_table_desc table_desc;
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if (!table_ptr)
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return AE_BAD_PARAMETER;
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ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
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table_desc.pointer = table_ptr;
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table_desc.length = table_ptr->length;
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table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN;
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/*
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* Install the new table into the local data structures
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*/
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status = acpi_tb_add_table(&table_desc, &table_index);
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if (ACPI_FAILURE(status)) {
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return status;
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}
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status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
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return status;
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}
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ACPI_EXPORT_SYMBOL(acpi_load_table)
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/******************************************************************************
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*
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* FUNCTION: acpi_get_table_header
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*
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* PARAMETERS: Signature - ACPI signature of needed table
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* Instance - Which instance (for SSDTs)
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* out_table_header - The pointer to the table header to fill
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*
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* RETURN: Status and pointer to mapped table header
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*
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* DESCRIPTION: Finds an ACPI table header.
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*
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* NOTE: Caller is responsible in unmapping the header with
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* acpi_os_unmap_memory
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*
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*****************************************************************************/
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acpi_status
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acpi_get_table_header(char *signature,
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acpi_native_uint instance,
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struct acpi_table_header * out_table_header)
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{
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acpi_native_uint i;
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acpi_native_uint j;
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struct acpi_table_header *header;
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/* Parameter validation */
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if (!signature || !out_table_header) {
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return (AE_BAD_PARAMETER);
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}
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/*
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* Walk the root table list
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*/
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for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
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if (!ACPI_COMPARE_NAME
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(&(acpi_gbl_root_table_list.tables[i].signature),
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signature)) {
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continue;
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}
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if (++j < instance) {
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continue;
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}
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if (!acpi_gbl_root_table_list.tables[i].pointer) {
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if ((acpi_gbl_root_table_list.tables[i].
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flags & ACPI_TABLE_ORIGIN_MASK) ==
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ACPI_TABLE_ORIGIN_MAPPED) {
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header =
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acpi_os_map_memory(acpi_gbl_root_table_list.
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tables[i].address,
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sizeof(struct
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acpi_table_header));
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if (!header) {
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return AE_NO_MEMORY;
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}
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ACPI_MEMCPY(out_table_header, header,
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sizeof(struct acpi_table_header));
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acpi_os_unmap_memory(header,
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sizeof(struct
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acpi_table_header));
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} else {
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return AE_NOT_FOUND;
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}
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} else {
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ACPI_MEMCPY(out_table_header,
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acpi_gbl_root_table_list.tables[i].pointer,
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sizeof(struct acpi_table_header));
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}
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return (AE_OK);
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}
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return (AE_NOT_FOUND);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_table_header)
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/******************************************************************************
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*
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* FUNCTION: acpi_unload_table_id
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*
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* PARAMETERS: id - Owner ID of the table to be removed.
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine is used to force the unload of a table (by id)
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*
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******************************************************************************/
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acpi_status acpi_unload_table_id(acpi_owner_id id)
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{
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int i;
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acpi_status status = AE_NOT_EXIST;
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ACPI_FUNCTION_TRACE(acpi_unload_table_id);
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/* Find table in the global table list */
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for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
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if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
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continue;
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}
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/*
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* Delete all namespace objects owned by this table. Note that these
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* objects can appear anywhere in the namespace by virtue of the AML
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* "Scope" operator. Thus, we need to track ownership by an ID, not
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* simply a position within the hierarchy
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*/
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acpi_tb_delete_namespace_by_owner(i);
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status = acpi_tb_release_owner_id(i);
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acpi_tb_set_table_loaded_flag(i, FALSE);
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break;
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}
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_table
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*
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* PARAMETERS: Signature - ACPI signature of needed table
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* Instance - Which instance (for SSDTs)
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* out_table - Where the pointer to the table is returned
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*
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* RETURN: Status and pointer to table
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*
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* DESCRIPTION: Finds and verifies an ACPI table.
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*
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*****************************************************************************/
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acpi_status
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acpi_get_table(char *signature,
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acpi_native_uint instance, struct acpi_table_header **out_table)
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{
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acpi_native_uint i;
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acpi_native_uint j;
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acpi_status status;
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/* Parameter validation */
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if (!signature || !out_table) {
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return (AE_BAD_PARAMETER);
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}
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/*
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* Walk the root table list
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*/
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for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
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if (!ACPI_COMPARE_NAME
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(&(acpi_gbl_root_table_list.tables[i].signature),
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signature)) {
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continue;
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}
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if (++j < instance) {
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continue;
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}
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status =
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acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]);
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if (ACPI_SUCCESS(status)) {
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*out_table = acpi_gbl_root_table_list.tables[i].pointer;
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}
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if (!acpi_gbl_permanent_mmap) {
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acpi_gbl_root_table_list.tables[i].pointer = NULL;
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}
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return (status);
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}
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return (AE_NOT_FOUND);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_table)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_table_by_index
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*
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* PARAMETERS: table_index - Table index
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* Table - Where the pointer to the table is returned
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*
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* RETURN: Status and pointer to the table
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*
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* DESCRIPTION: Obtain a table by an index into the global table list.
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*
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******************************************************************************/
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acpi_status
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acpi_get_table_by_index(acpi_native_uint table_index,
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struct acpi_table_header ** table)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_get_table_by_index);
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/* Parameter validation */
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if (!table) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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/* Validate index */
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if (table_index >= acpi_gbl_root_table_list.count) {
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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if (!acpi_gbl_root_table_list.tables[table_index].pointer) {
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/* Table is not mapped, map it */
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status =
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acpi_tb_verify_table(&acpi_gbl_root_table_list.
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tables[table_index]);
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if (ACPI_FAILURE(status)) {
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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return_ACPI_STATUS(status);
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}
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}
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*table = acpi_gbl_root_table_list.tables[table_index].pointer;
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_table_by_index)
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_load_namespace
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
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* the RSDT/XSDT.
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*
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******************************************************************************/
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static acpi_status acpi_tb_load_namespace(void)
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{
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acpi_status status;
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struct acpi_table_header *table;
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acpi_native_uint i;
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ACPI_FUNCTION_TRACE(tb_load_namespace);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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/*
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* Load the namespace. The DSDT is required, but any SSDT and PSDT tables
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* are optional.
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*/
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if (!acpi_gbl_root_table_list.count ||
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!ACPI_COMPARE_NAME(&
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(acpi_gbl_root_table_list.
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tables[ACPI_TABLE_INDEX_DSDT].signature),
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ACPI_SIG_DSDT)
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||
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ACPI_FAILURE(acpi_tb_verify_table
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(&acpi_gbl_root_table_list.
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tables[ACPI_TABLE_INDEX_DSDT]))) {
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status = AE_NO_ACPI_TABLES;
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goto unlock_and_exit;
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}
|
|
|
|
/*
|
|
* Find DSDT table
|
|
*/
|
|
status =
|
|
acpi_os_table_override(acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT].pointer,
|
|
&table);
|
|
if (ACPI_SUCCESS(status) && table) {
|
|
/*
|
|
* DSDT table has been found
|
|
*/
|
|
acpi_tb_delete_table(&acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT]);
|
|
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer =
|
|
table;
|
|
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length =
|
|
table->length;
|
|
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags =
|
|
ACPI_TABLE_ORIGIN_UNKNOWN;
|
|
|
|
ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS"));
|
|
acpi_tb_print_table_header(0, table);
|
|
|
|
if (no_auto_ssdt == 0) {
|
|
printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"");
|
|
}
|
|
}
|
|
|
|
status =
|
|
acpi_tb_verify_table(&acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT]);
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
/* A valid DSDT is required */
|
|
|
|
status = AE_NO_ACPI_TABLES;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
|
|
/*
|
|
* Load and parse tables.
|
|
*/
|
|
status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Load any SSDT or PSDT tables. Note: Loop leaves tables locked
|
|
*/
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
|
|
if ((!ACPI_COMPARE_NAME
|
|
(&(acpi_gbl_root_table_list.tables[i].signature),
|
|
ACPI_SIG_SSDT)
|
|
&&
|
|
!ACPI_COMPARE_NAME(&
|
|
(acpi_gbl_root_table_list.tables[i].
|
|
signature), ACPI_SIG_PSDT))
|
|
||
|
|
ACPI_FAILURE(acpi_tb_verify_table
|
|
(&acpi_gbl_root_table_list.tables[i]))) {
|
|
continue;
|
|
}
|
|
|
|
if (no_auto_ssdt) {
|
|
printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");
|
|
continue;
|
|
}
|
|
|
|
/* Ignore errors while loading tables, get as many as possible */
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
(void)acpi_ns_load_table(i, acpi_gbl_root_node);
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_load_tables
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_load_tables(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_load_tables);
|
|
|
|
/*
|
|
* Load the namespace from the tables
|
|
*/
|
|
status = acpi_tb_load_namespace();
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"While loading namespace from ACPI tables"));
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_load_tables)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_table_handler
|
|
*
|
|
* PARAMETERS: Handler - Table event handler
|
|
* Context - Value passed to the handler on each event
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install table event handler
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_install_table_handler(acpi_tbl_handler handler, void *context)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_table_handler);
|
|
|
|
if (!handler) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Don't allow more than one handler */
|
|
|
|
if (acpi_gbl_table_handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
acpi_gbl_table_handler = handler;
|
|
acpi_gbl_table_handler_context = context;
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_table_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_table_handler
|
|
*
|
|
* PARAMETERS: Handler - Table event handler that was installed
|
|
* previously.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove table event handler
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_remove_table_handler(acpi_tbl_handler handler)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_remove_table_handler);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Make sure that the installed handler is the same */
|
|
|
|
if (!handler || handler != acpi_gbl_table_handler) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
acpi_gbl_table_handler = NULL;
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_table_handler)
|
|
|
|
|
|
static int __init acpi_no_auto_ssdt_setup(char *s) {
|
|
|
|
printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");
|
|
|
|
no_auto_ssdt = 1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);
|