Release 4.11 drivers/acpi/acpica/tbxface.c
/******************************************************************************
*
* Module Name: tbxface - ACPI table-oriented external interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, 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.
*/
#define EXPORT_ACPI_INTERFACES
#include <acpi/acpi.h>
#include "accommon.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbxface")
/*******************************************************************************
*
* FUNCTION: acpi_allocate_root_table
*
* PARAMETERS: initial_table_count - Size of initial_table_array, in number of
* struct acpi_table_desc structures
*
* RETURN: Status
*
* DESCRIPTION: Allocate a root table array. Used by iASL compiler and
* acpi_initialize_tables.
*
******************************************************************************/
acpi_status acpi_allocate_root_table(u32 initial_table_count)
{
acpi_gbl_root_table_list.max_table_count = initial_table_count;
acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE;
return (acpi_tb_resize_root_table_list());
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 26 | 100.00% | 2 | 100.00% |
| Total | 26 | 100.00% | 2 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_initialize_tables
*
* PARAMETERS: initial_table_array - Pointer to an array of pre-allocated
* struct acpi_table_desc structures. If NULL, the
* array is dynamically allocated.
* initial_table_count - Size of initial_table_array, in number of
* struct acpi_table_desc structures
* allow_resize - Flag to tell Table Manager if resize of
* pre-allocated array is allowed. Ignored
* if initial_table_array is NULL.
*
* RETURN: Status
*
* DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
*
* NOTE: Allows static allocation of the initial table array in order
* to avoid the use of dynamic memory in confined environments
* such as the kernel boot sequence where it may not be available.
*
* If the host OS memory managers are initialized, use NULL for
* initial_table_array, and the table will be dynamically allocated.
*
******************************************************************************/
acpi_status ACPI_INIT_FUNCTION
acpi_initialize_tables(struct acpi_table_desc *initial_table_array,
u32 initial_table_count, u8 allow_resize)
{
acpi_physical_address rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_initialize_tables);
/*
* Setup the Root Table Array and allocate the table array
* if requested
*/
if (!initial_table_array) {
status = acpi_allocate_root_table(initial_table_count);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
/* Root Table Array has been statically allocated by the host */
memset(initial_table_array, 0,
(acpi_size)initial_table_count *
sizeof(struct acpi_table_desc));
acpi_gbl_root_table_list.tables = initial_table_array;
acpi_gbl_root_table_list.max_table_count = initial_table_count;
acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
if (allow_resize) {
acpi_gbl_root_table_list.flags |=
ACPI_ROOT_ALLOW_RESIZE;
}
}
/* Get the address of the RSDP */
rsdp_address = acpi_os_get_root_pointer();
if (!rsdp_address) {
return_ACPI_STATUS(AE_NOT_FOUND);
}
/*
* Get the root table (RSDT or XSDT) and extract all entries to the local
* Root Table Array. This array contains the information of the RSDT/XSDT
* in a common, more useable format.
*/
status = acpi_tb_parse_root_table(rsdp_address);
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 81 | 57.86% | 7 | 46.67% |
| Linus Torvalds (pre-git) | 38 | 27.14% | 2 | 13.33% |
| Linus Torvalds | 16 | 11.43% | 1 | 6.67% |
| Andy Grover | 3 | 2.14% | 3 | 20.00% |
| Tang Chen | 1 | 0.71% | 1 | 6.67% |
| Lv Zheng | 1 | 0.71% | 1 | 6.67% |
| Total | 140 | 100.00% | 15 | 100.00% |
ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_tables)
/*******************************************************************************
*
* FUNCTION: acpi_reallocate_root_table
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
* root list from the previously provided scratch area. Should
* be called once dynamic memory allocation is available in the
* kernel.
*
******************************************************************************/
acpi_status ACPI_INIT_FUNCTION acpi_reallocate_root_table(void)
{
acpi_status status;
u32 i;
ACPI_FUNCTION_TRACE(acpi_reallocate_root_table);
/*
* Only reallocate the root table if the host provided a static buffer
* for the table array in the call to acpi_initialize_tables.
*/
if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
return_ACPI_STATUS(AE_SUPPORT);
}
/*
* Ensure OS early boot logic, which is required by some hosts. If the
* table state is reported to be wrong, developers should fix the
* issue by invoking acpi_put_table() for the reported table during the
* early stage.
*/
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (acpi_gbl_root_table_list.tables[i].pointer) {
ACPI_ERROR((AE_INFO,
"Table [%4.4s] is not invalidated during early boot stage",
acpi_gbl_root_table_list.tables[i].
signature.ascii));
}
}
acpi_gbl_root_table_list.flags |= ACPI_ROOT_ALLOW_RESIZE;
status = acpi_tb_resize_root_table_list();
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lv Zheng | 64 | 62.75% | 3 | 27.27% |
| Robert Moore | 20 | 19.61% | 3 | 27.27% |
| Linus Torvalds (pre-git) | 8 | 7.84% | 1 | 9.09% |
| Linus Torvalds | 7 | 6.86% | 1 | 9.09% |
| Alexey Y. Starikovskiy | 1 | 0.98% | 1 | 9.09% |
| Len Brown | 1 | 0.98% | 1 | 9.09% |
| Andy Grover | 1 | 0.98% | 1 | 9.09% |
| Total | 102 | 100.00% | 11 | 100.00% |
ACPI_EXPORT_SYMBOL_INIT(acpi_reallocate_root_table)
/*******************************************************************************
*
* FUNCTION: acpi_get_table_header
*
* PARAMETERS: signature - ACPI signature of needed table
* instance - Which instance (for SSDTs)
* out_table_header - The pointer to the table header to fill
*
* RETURN: Status and pointer to mapped table header
*
* DESCRIPTION: Finds an ACPI table header.
*
* NOTE: Caller is responsible in unmapping the header with
* acpi_os_unmap_memory
*
******************************************************************************/
acpi_status
acpi_get_table_header(char *signature,
u32 instance, struct acpi_table_header *out_table_header)
{
u32 i;
u32 j;
struct acpi_table_header *header;
/* Parameter validation */
if (!signature || !out_table_header) {
return (AE_BAD_PARAMETER);
}
/* Walk the root table list */
for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
i++) {
if (!ACPI_COMPARE_NAME
(&(acpi_gbl_root_table_list.tables[i].signature),
signature)) {
continue;
}
if (++j < instance) {
continue;
}
if (!acpi_gbl_root_table_list.tables[i].pointer) {
if ((acpi_gbl_root_table_list.tables[i].flags &
ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL) {
header =
acpi_os_map_memory(acpi_gbl_root_table_list.
tables[i].address,
sizeof(struct
acpi_table_header));
if (!header) {
return (AE_NO_MEMORY);
}
memcpy(out_table_header, header,
sizeof(struct acpi_table_header));
acpi_os_unmap_memory(header,
sizeof(struct
acpi_table_header));
} else {
return (AE_NOT_FOUND);
}
} else {
memcpy(out_table_header,
acpi_gbl_root_table_list.tables[i].pointer,
sizeof(struct acpi_table_header));
}
return (AE_OK);
}
return (AE_NOT_FOUND);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 115 | 50.22% | 8 | 80.00% |
| Alexey Y. Starikovskiy | 89 | 38.86% | 1 | 10.00% |
| John Keller | 25 | 10.92% | 1 | 10.00% |
| Total | 229 | 100.00% | 10 | 100.00% |
ACPI_EXPORT_SYMBOL(acpi_get_table_header)
/*******************************************************************************
*
* FUNCTION: acpi_get_table
*
* PARAMETERS: signature - ACPI signature of needed table
* instance - Which instance (for SSDTs)
* out_table - Where the pointer to the table is returned
*
* RETURN: Status and pointer to the requested table
*
* DESCRIPTION: Finds and verifies an ACPI table. Table must be in the
* RSDT/XSDT.
* Note that an early stage acpi_get_table() call must be paired
* with an early stage acpi_put_table() call. otherwise the table
* pointer mapped by the early stage mapping implementation may be
* erroneously unmapped by the late stage unmapping implementation
* in an acpi_put_table() invoked during the late stage.
*
******************************************************************************/
acpi_status
acpi_get_table(char *signature,
u32 instance, struct acpi_table_header ** out_table)
{
u32 i;
u32 j;
acpi_status status = AE_NOT_FOUND;
struct acpi_table_desc *table_desc;
/* Parameter validation */
if (!signature || !out_table) {
return (AE_BAD_PARAMETER);
}
/*
* Note that the following line is required by some OSPMs, they only
* check if the returned table is NULL instead of the returned status
* to determined if this function is succeeded.
*/
*out_table = NULL;
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Walk the root table list */
for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
i++) {
table_desc = &acpi_gbl_root_table_list.tables[i];
if (!ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
continue;
}
if (++j < instance) {
continue;
}
status = acpi_tb_get_table(table_desc, out_table);
break;
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return (status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 81 | 55.86% | 5 | 50.00% |
| Lv Zheng | 44 | 30.34% | 1 | 10.00% |
| Linus Torvalds (pre-git) | 13 | 8.97% | 2 | 20.00% |
| Linus Torvalds | 6 | 4.14% | 1 | 10.00% |
| Andy Grover | 1 | 0.69% | 1 | 10.00% |
| Total | 145 | 100.00% | 10 | 100.00% |
ACPI_EXPORT_SYMBOL(acpi_get_table)
/*******************************************************************************
*
* FUNCTION: acpi_put_table
*
* PARAMETERS: table - The pointer to the table
*
* RETURN: None
*
* DESCRIPTION: Release a table returned by acpi_get_table() and its clones.
* Note that it is not safe if this function was invoked after an
* uninstallation happened to the original table descriptor.
* Currently there is no OSPMs' requirement to handle such
* situations.
*
******************************************************************************/
void acpi_put_table(struct acpi_table_header *table)
{
u32 i;
struct acpi_table_desc *table_desc;
ACPI_FUNCTION_TRACE(acpi_put_table);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Walk the root table list */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
table_desc = &acpi_gbl_root_table_list.tables[i];
if (table_desc->pointer != table) {
continue;
}
acpi_tb_put_table(table_desc);
break;
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_VOID;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lv Zheng | 75 | 87.21% | 1 | 50.00% |
| Yinghai Lu | 11 | 12.79% | 1 | 50.00% |
| Total | 86 | 100.00% | 2 | 100.00% |
ACPI_EXPORT_SYMBOL(acpi_put_table)
/*******************************************************************************
*
* FUNCTION: acpi_get_table_by_index
*
* PARAMETERS: table_index - Table index
* out_table - Where the pointer to the table is returned
*
* RETURN: Status and pointer to the requested table
*
* DESCRIPTION: Obtain a table by an index into the global table list. Used
* internally also.
*
******************************************************************************/
acpi_status
acpi_get_table_by_index(u32 table_index, struct acpi_table_header **out_table)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_get_table_by_index);
/* Parameter validation */
if (!out_table) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Note that the following line is required by some OSPMs, they only
* check if the returned table is NULL instead of the returned status
* to determined if this function is succeeded.
*/
*out_table = NULL;
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Validate index */
if (table_index >= acpi_gbl_root_table_list.current_table_count) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
status =
acpi_tb_get_table(&acpi_gbl_root_table_list.tables[table_index],
out_table);
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 59 | 60.82% | 4 | 57.14% |
| Lv Zheng | 18 | 18.56% | 1 | 14.29% |
| Linus Torvalds (pre-git) | 12 | 12.37% | 1 | 14.29% |
| Linus Torvalds | 8 | 8.25% | 1 | 14.29% |
| Total | 97 | 100.00% | 7 | 100.00% |
ACPI_EXPORT_SYMBOL(acpi_get_table_by_index)
/*******************************************************************************
*
* FUNCTION: acpi_install_table_handler
*
* PARAMETERS: handler - Table event handler
* context - Value passed to the handler on each event
*
* RETURN: Status
*
* DESCRIPTION: Install a global table event handler.
*
******************************************************************************/
acpi_status
acpi_install_table_handler(acpi_table_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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lin Ming | 90 | 98.90% | 1 | 50.00% |
| Lv Zheng | 1 | 1.10% | 1 | 50.00% |
| Total | 91 | 100.00% | 2 | 100.00% |
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 a table event handler
*
******************************************************************************/
acpi_status acpi_remove_table_handler(acpi_table_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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lin Ming | 75 | 98.68% | 1 | 50.00% |
| Lv Zheng | 1 | 1.32% | 1 | 50.00% |
| Total | 76 | 100.00% | 2 | 100.00% |
ACPI_EXPORT_SYMBOL(acpi_remove_table_handler)
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 392 | 37.16% | 16 | 37.21% |
| Lv Zheng | 221 | 20.95% | 7 | 16.28% |
| Lin Ming | 173 | 16.40% | 1 | 2.33% |
| Alexey Y. Starikovskiy | 90 | 8.53% | 2 | 4.65% |
| Linus Torvalds (pre-git) | 80 | 7.58% | 3 | 6.98% |
| Linus Torvalds | 38 | 3.60% | 2 | 4.65% |
| John Keller | 28 | 2.65% | 1 | 2.33% |
| Yinghai Lu | 11 | 1.04% | 1 | 2.33% |
| Andy Grover | 6 | 0.57% | 3 | 6.98% |
| Tang Chen | 5 | 0.47% | 1 | 2.33% |
| Len Brown | 5 | 0.47% | 3 | 6.98% |
| Alex Deucher | 3 | 0.28% | 1 | 2.33% |
| Paul Gortmaker | 2 | 0.19% | 1 | 2.33% |
| Patrick Mochel | 1 | 0.09% | 1 | 2.33% |
| Total | 1055 | 100.00% | 43 | 100.00% |
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