On Wed, 2010-07-28 at 14:27 +0800, Lin Ming wrote: > Hi, all > > http://www.acpica.org/bugzilla/show_bug.cgi?id=836 > > This patch series is to implement new OSI interfaces to dynamically > install/remove _OSI entries. > > Thanks for any comment. > Lin Ming Below is the updated version. The ACPICA part change has been merged into ACPICA git repository. Please have a look at the Linux OSL _OSI code change, say drivers/acpi/osl.c. Thanks. Subject: [PATCH] ACPICA/ACPI: Add new host interfaces for _OSI support Adds install/remove interfaces so that the host can dynamically alter the global _OSI table. Also adds support for _OSI handlers. Additional support: new debugger command (osi), and test support in the acpiexec utility. Adds new file, utilities/utosi.c. ACPICA bugzilla 836. The Linux OSL _OSI code is also changed. acpi_osi_setup can't call acpi_install/remove_interface because ACPICA is not initialized yet at this early time. So we just save the osi string in acpi_osi_setup and will handle it later in a new function acpi_osi_setup_late. http://www.acpica.org/bugzilla/show_bug.cgi?id=836 Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx> Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx --- drivers/acpi/acpica/Makefile | 3 +- drivers/acpi/acpica/acdebug.h | 2 + drivers/acpi/acpica/acglobal.h | 6 + drivers/acpi/acpica/aclocal.h | 5 + drivers/acpi/acpica/acutils.h | 17 ++- drivers/acpi/acpica/uteval.c | 147 ---------------- drivers/acpi/acpica/utglobal.c | 2 + drivers/acpi/acpica/utinit.c | 4 + drivers/acpi/acpica/utmutex.c | 8 + drivers/acpi/acpica/utosi.c | 379 ++++++++++++++++++++++++++++++++++++++++ drivers/acpi/acpica/utxface.c | 125 +++++++++++++- drivers/acpi/osl.c | 88 +++++----- include/acpi/acpiosxf.h | 3 - include/acpi/acpixf.h | 6 + include/acpi/actypes.h | 3 + 15 files changed, 602 insertions(+), 196 deletions(-) diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile index d93cc06..262903e 100644 --- a/drivers/acpi/acpica/Makefile +++ b/drivers/acpi/acpica/Makefile @@ -44,4 +44,5 @@ acpi-y += tbxface.o tbinstal.o tbutils.o tbfind.o tbfadt.o tbxfroot.o acpi-y += utalloc.o utdebug.o uteval.o utinit.o utmisc.o utxface.o \ utcopy.o utdelete.o utglobal.o utmath.o utobject.o \ - utstate.o utmutex.o utobject.o utresrc.o utlock.o utids.o + utstate.o utmutex.o utobject.o utresrc.o utlock.o utids.o \ + utosi.o diff --git a/drivers/acpi/acpica/acdebug.h b/drivers/acpi/acpica/acdebug.h index 48faf3e..72e9d5e 100644 --- a/drivers/acpi/acpica/acdebug.h +++ b/drivers/acpi/acpica/acdebug.h @@ -105,6 +105,8 @@ void acpi_db_set_method_data(char *type_arg, char *index_arg, char *value_arg); acpi_status acpi_db_display_objects(char *obj_type_arg, char *display_count_arg); +void acpi_db_display_interfaces(char *action_arg, char *interface_name_arg); + acpi_status acpi_db_find_name_in_namespace(char *name_arg); void acpi_db_set_scope(char *name); diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 18e796f..ea2316d 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -187,6 +187,10 @@ ACPI_EXTERN u8 acpi_gbl_integer_bit_width; ACPI_EXTERN u8 acpi_gbl_integer_byte_width; ACPI_EXTERN u8 acpi_gbl_integer_nybble_width; +/* Mutex for _OSI support */ + +ACPI_EXTERN acpi_mutex acpi_gbl_osi_mutex; + /* Reader/Writer lock is used for namespace walk and dynamic table unload */ ACPI_EXTERN struct acpi_rw_lock acpi_gbl_namespace_rw_lock; @@ -255,6 +259,7 @@ ACPI_EXTERN acpi_init_handler acpi_gbl_init_handler; ACPI_EXTERN acpi_tbl_handler acpi_gbl_table_handler; ACPI_EXTERN void *acpi_gbl_table_handler_context; ACPI_EXTERN struct acpi_walk_state *acpi_gbl_breakpoint_walk; +ACPI_EXTERN acpi_interface_handler acpi_gbl_interface_handler; /* Owner ID support */ @@ -275,6 +280,7 @@ ACPI_EXTERN u8 acpi_gbl_acpi_hardware_present; ACPI_EXTERN u8 acpi_gbl_events_initialized; ACPI_EXTERN u8 acpi_gbl_system_awake_and_running; ACPI_EXTERN u8 acpi_gbl_osi_data; +ACPI_EXTERN struct acpi_interface_info *acpi_gbl_supported_interfaces; #ifndef DEFINE_ACPI_GLOBALS diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h index 1ee0bcf..e9cedae 100644 --- a/drivers/acpi/acpica/aclocal.h +++ b/drivers/acpi/acpica/aclocal.h @@ -913,9 +913,14 @@ struct acpi_bit_register_info { struct acpi_interface_info { char *name; + struct acpi_interface_info *next; + u8 flags; u8 value; }; +#define ACPI_OSI_INVALID 0x01 +#define ACPI_OSI_DYNAMIC 0x02 + struct acpi_port_info { char *name; u16 start; diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h index 35df755..78e0121 100644 --- a/drivers/acpi/acpica/acutils.h +++ b/drivers/acpi/acpica/acutils.h @@ -312,8 +312,6 @@ void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list); /* * uteval - object evaluation */ -acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state); - acpi_status acpi_ut_evaluate_object(struct acpi_namespace_node *prefix_node, char *path, @@ -395,6 +393,21 @@ acpi_status acpi_ut_get_object_size(union acpi_operand_object *obj, acpi_size * obj_length); /* + * utosi - Support for the _OSI predefined control method + */ +acpi_status acpi_ut_initialize_interfaces(void); + +void acpi_ut_interface_terminate(void); + +acpi_status acpi_ut_install_interface(acpi_string interface_name); + +acpi_status acpi_ut_remove_interface(acpi_string interface_name); + +struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name); + +acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state); + +/* * utstate - Generic state creation/cache routines */ void diff --git a/drivers/acpi/acpica/uteval.c b/drivers/acpi/acpica/uteval.c index 6dfdeb6..22f59ef 100644 --- a/drivers/acpi/acpica/uteval.c +++ b/drivers/acpi/acpica/uteval.c @@ -48,153 +48,6 @@ #define _COMPONENT ACPI_UTILITIES ACPI_MODULE_NAME("uteval") -/* - * Strings supported by the _OSI predefined (internal) method. - * - * March 2009: Removed "Linux" as this host no longer wants to respond true - * for this string. Basically, the only safe OS strings are windows-related - * and in many or most cases represent the only test path within the - * BIOS-provided ASL code. - * - * The second element of each entry is used to track the newest version of - * Windows that the BIOS has requested. - */ -static struct acpi_interface_info acpi_interfaces_supported[] = { - /* Operating System Vendor Strings */ - - {"Windows 2000", ACPI_OSI_WIN_2000}, /* Windows 2000 */ - {"Windows 2001", ACPI_OSI_WIN_XP}, /* Windows XP */ - {"Windows 2001 SP1", ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ - {"Windows 2001.1", ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ - {"Windows 2001 SP2", ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ - {"Windows 2001.1 SP1", ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ - {"Windows 2006", ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ - {"Windows 2006.1", ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ - {"Windows 2006 SP1", ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ - {"Windows 2009", ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ - - /* Feature Group Strings */ - - {"Extended Address Space Descriptor", 0} - - /* - * All "optional" feature group strings (features that are implemented - * by the host) should be implemented in the host version of - * acpi_os_validate_interface and should not be added here. - */ -}; - -/******************************************************************************* - * - * FUNCTION: acpi_ut_osi_implementation - * - * PARAMETERS: walk_state - Current walk state - * - * RETURN: Status - * - * DESCRIPTION: Implementation of the _OSI predefined control method - * - ******************************************************************************/ - -acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) -{ - acpi_status status; - union acpi_operand_object *string_desc; - union acpi_operand_object *return_desc; - u32 return_value; - u32 i; - - ACPI_FUNCTION_TRACE(ut_osi_implementation); - - /* Validate the string input argument */ - - string_desc = walk_state->arguments[0].object; - if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { - return_ACPI_STATUS(AE_TYPE); - } - - /* Create a return object */ - - return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); - if (!return_desc) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* Default return value is 0, NOT SUPPORTED */ - - return_value = 0; - - /* Compare input string to static table of supported interfaces */ - - for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) { - if (!ACPI_STRCMP(string_desc->string.pointer, - acpi_interfaces_supported[i].name)) { - /* - * The interface is supported. - * Update the osi_data if necessary. We keep track of the latest - * version of Windows that has been requested by the BIOS. - */ - if (acpi_interfaces_supported[i].value > - acpi_gbl_osi_data) { - acpi_gbl_osi_data = - acpi_interfaces_supported[i].value; - } - - return_value = ACPI_UINT32_MAX; - goto exit; - } - } - - /* - * Did not match the string in the static table, call the host OSL to - * check for a match with one of the optional strings (such as - * "Module Device", "3.0 Thermal Model", etc.) - */ - status = acpi_os_validate_interface(string_desc->string.pointer); - if (ACPI_SUCCESS(status)) { - - /* The interface is supported */ - - return_value = ACPI_UINT32_MAX; - } - -exit: - ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, - "ACPI: BIOS _OSI(%s) is %ssupported\n", - string_desc->string.pointer, return_value == 0 ? "not " : "")); - - /* Complete the return value */ - - return_desc->integer.value = return_value; - walk_state->return_desc = return_desc; - return_ACPI_STATUS (AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_osi_invalidate - * - * PARAMETERS: interface_string - * - * RETURN: Status - * - * DESCRIPTION: invalidate string in pre-defiend _OSI string list - * - ******************************************************************************/ - -acpi_status acpi_osi_invalidate(char *interface) -{ - int i; - - for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) { - if (!ACPI_STRCMP(interface, acpi_interfaces_supported[i].name)) { - *acpi_interfaces_supported[i].name = '\0'; - return AE_OK; - } - } - return AE_NOT_FOUND; -} - /******************************************************************************* * * FUNCTION: acpi_ut_evaluate_object diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c index 0558747..45f6334 100644 --- a/drivers/acpi/acpica/utglobal.c +++ b/drivers/acpi/acpica/utglobal.c @@ -774,6 +774,7 @@ acpi_status acpi_ut_init_globals(void) acpi_gbl_exception_handler = NULL; acpi_gbl_init_handler = NULL; acpi_gbl_table_handler = NULL; + acpi_gbl_interface_handler = NULL; /* Global Lock support */ @@ -800,6 +801,7 @@ acpi_status acpi_ut_init_globals(void) acpi_gbl_debugger_configuration = DEBUGGER_THREADING; acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT; acpi_gbl_osi_data = 0; + acpi_gbl_osi_mutex = NULL; /* Hardware oriented */ diff --git a/drivers/acpi/acpica/utinit.c b/drivers/acpi/acpica/utinit.c index a39c93d..c1b1c80 100644 --- a/drivers/acpi/acpica/utinit.c +++ b/drivers/acpi/acpica/utinit.c @@ -117,6 +117,10 @@ void acpi_ut_subsystem_shutdown(void) /* Close the acpi_event Handling */ acpi_ev_terminate(); + + /* Delete any dynamic _OSI interfaces */ + + acpi_ut_interface_terminate(); #endif /* Close the Namespace */ diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c index 058b3df..ac7efa7 100644 --- a/drivers/acpi/acpica/utmutex.c +++ b/drivers/acpi/acpica/utmutex.c @@ -86,6 +86,12 @@ acpi_status acpi_ut_mutex_initialize(void) spin_lock_init(acpi_gbl_gpe_lock); spin_lock_init(acpi_gbl_hardware_lock); + /* Mutex for _OSI support */ + status = acpi_os_create_mutex(&acpi_gbl_osi_mutex); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + /* Create the reader/writer lock for namespace access */ status = acpi_ut_create_rw_lock(&acpi_gbl_namespace_rw_lock); @@ -117,6 +123,8 @@ void acpi_ut_mutex_terminate(void) acpi_ut_delete_mutex(i); } + acpi_os_delete_mutex(acpi_gbl_osi_mutex); + /* Delete the spinlocks */ acpi_os_delete_lock(acpi_gbl_gpe_lock); diff --git a/drivers/acpi/acpica/utosi.c b/drivers/acpi/acpica/utosi.c new file mode 100644 index 0000000..0a37950 --- /dev/null +++ b/drivers/acpi/acpica/utosi.c @@ -0,0 +1,379 @@ +/****************************************************************************** + * + * Module Name: utosi - Support for the _OSI predefined control method + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2010, 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" + +#define _COMPONENT ACPI_UTILITIES +ACPI_MODULE_NAME("utosi") + +/* + * Strings supported by the _OSI predefined control method (which is + * implemented internally within this module.) + * + * March 2009: Removed "Linux" as this host no longer wants to respond true + * for this string. Basically, the only safe OS strings are windows-related + * and in many or most cases represent the only test path within the + * BIOS-provided ASL code. + * + * The last element of each entry is used to track the newest version of + * Windows that the BIOS has requested. + */ +static struct acpi_interface_info acpi_default_supported_interfaces[] = { + /* Operating System Vendor Strings */ + + {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ + {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ + {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ + {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ + {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ + {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ + {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ + {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ + {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ + {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ + + /* Feature Group Strings */ + + {"Extended Address Space Descriptor", NULL, 0, 0} + + /* + * All "optional" feature group strings (features that are implemented + * by the host) should be dynamically added by the host via + * acpi_install_interface and should not be manually added here. + * + * Examples of optional feature group strings: + * + * "Module Device" + * "Processor Device" + * "3.0 Thermal Model" + * "3.0 _SCP Extensions" + * "Processor Aggregator Device" + */ +}; + +/******************************************************************************* + * + * FUNCTION: acpi_ut_initialize_interfaces + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Initialize the global _OSI supported interfaces list + * + ******************************************************************************/ + +acpi_status acpi_ut_initialize_interfaces(void) +{ + u32 i; + + (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); + acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; + + /* Link the static list of supported interfaces */ + + for (i = 0; + i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); + i++) { + acpi_default_supported_interfaces[i].next = + &acpi_default_supported_interfaces[(acpi_size) i + 1]; + } + + acpi_os_release_mutex(acpi_gbl_osi_mutex); + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_interface_terminate + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Delete all interfaces in the global list. Sets + * acpi_gbl_supported_interfaces to NULL. + * + ******************************************************************************/ + +void acpi_ut_interface_terminate(void) +{ + struct acpi_interface_info *next_interface; + + (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); + next_interface = acpi_gbl_supported_interfaces; + + while (next_interface) { + acpi_gbl_supported_interfaces = next_interface->next; + + /* Only interfaces added at runtime can be freed */ + + if (next_interface->flags & ACPI_OSI_DYNAMIC) { + ACPI_FREE(next_interface->name); + ACPI_FREE(next_interface); + } + + next_interface = acpi_gbl_supported_interfaces; + } + + acpi_os_release_mutex(acpi_gbl_osi_mutex); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_install_interface + * + * PARAMETERS: interface_name - The interface to install + * + * RETURN: Status + * + * DESCRIPTION: Install the interface into the global interface list. + * Caller MUST hold acpi_gbl_osi_mutex + * + ******************************************************************************/ + +acpi_status acpi_ut_install_interface(acpi_string interface_name) +{ + struct acpi_interface_info *interface_info; + + /* Allocate info block and space for the name string */ + + interface_info = + ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); + if (!interface_info) { + return (AE_NO_MEMORY); + } + + interface_info->name = + ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1); + if (!interface_info->name) { + ACPI_FREE(interface_info); + return (AE_NO_MEMORY); + } + + /* Initialize new info and insert at the head of the global list */ + + ACPI_STRCPY(interface_info->name, interface_name); + interface_info->flags = ACPI_OSI_DYNAMIC; + interface_info->next = acpi_gbl_supported_interfaces; + + acpi_gbl_supported_interfaces = interface_info; + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_remove_interface + * + * PARAMETERS: interface_name - The interface to remove + * + * RETURN: Status + * + * DESCRIPTION: Remove the interface from the global interface list. + * Caller MUST hold acpi_gbl_osi_mutex + * + ******************************************************************************/ + +acpi_status acpi_ut_remove_interface(acpi_string interface_name) +{ + struct acpi_interface_info *previous_interface; + struct acpi_interface_info *next_interface; + + previous_interface = next_interface = acpi_gbl_supported_interfaces; + while (next_interface) { + if (!ACPI_STRCMP(interface_name, next_interface->name)) { + + /* Found: name is in either the static list or was added at runtime */ + + if (next_interface->flags & ACPI_OSI_DYNAMIC) { + + /* Interface was added dynamically, remove and free it */ + + if (previous_interface == next_interface) { + acpi_gbl_supported_interfaces = + next_interface->next; + } else { + previous_interface->next = + next_interface->next; + } + + ACPI_FREE(next_interface->name); + ACPI_FREE(next_interface); + } else { + /* + * Interface is in static list. If marked invalid, then it + * does not actually exist. Else, mark it invalid. + */ + if (next_interface->flags & ACPI_OSI_INVALID) { + return (AE_NOT_EXIST); + } + + next_interface->flags |= ACPI_OSI_INVALID; + } + + return (AE_OK); + } + + previous_interface = next_interface; + next_interface = next_interface->next; + } + + /* Interface was not found */ + + return (AE_NOT_EXIST); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_get_interface + * + * PARAMETERS: interface_name - The interface to find + * + * RETURN: struct acpi_interface_info if found. NULL if not found. + * + * DESCRIPTION: Search for the specified interface name in the global list. + * Caller MUST hold acpi_gbl_osi_mutex + * + ******************************************************************************/ + +struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) +{ + struct acpi_interface_info *next_interface; + + next_interface = acpi_gbl_supported_interfaces; + while (next_interface) { + if (!ACPI_STRCMP(interface_name, next_interface->name)) { + return (next_interface); + } + + next_interface = next_interface->next; + } + + return (NULL); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_osi_implementation + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Implementation of the _OSI predefined control method. When + * an invocation of _OSI is encountered in the system AML, + * control is transferred to this function. + * + ******************************************************************************/ + +acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state) +{ + union acpi_operand_object *string_desc; + union acpi_operand_object *return_desc; + struct acpi_interface_info *interface_info; + acpi_interface_handler interface_handler; + u32 return_value; + + ACPI_FUNCTION_TRACE(ut_osi_implementation); + + /* Validate the string input argument (from the AML caller) */ + + string_desc = walk_state->arguments[0].object; + if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { + return_ACPI_STATUS(AE_TYPE); + } + + /* Create a return object */ + + return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!return_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Default return value is 0, NOT SUPPORTED */ + + return_value = 0; + (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); + + /* Lookup the interface in the global _OSI list */ + + interface_info = acpi_ut_get_interface(string_desc->string.pointer); + if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { + /* + * The interface is supported. + * Update the osi_data if necessary. We keep track of the latest + * version of Windows that has been requested by the BIOS. + */ + if (interface_info->value > acpi_gbl_osi_data) { + acpi_gbl_osi_data = interface_info->value; + } + + return_value = ACPI_UINT32_MAX; + } + + acpi_os_release_mutex(acpi_gbl_osi_mutex); + + /* + * Invoke an optional _OSI interface handler. The host OS may wish + * to do some interface-specific handling. For example, warn about + * certain interfaces or override the true/false support value. + */ + interface_handler = acpi_gbl_interface_handler; + if (interface_handler) { + return_value = + interface_handler(string_desc->string.pointer, + return_value); + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, + "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", + string_desc->string.pointer, + return_value == 0 ? "not " : "")); + + /* Complete the return object */ + + return_desc->integer.value = return_value; + walk_state->return_desc = return_desc; + return_ACPI_STATUS(AE_OK); +} diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c index 7f8cefc..c2da90f 100644 --- a/drivers/acpi/acpica/utxface.c +++ b/drivers/acpi/acpica/utxface.c @@ -110,6 +110,15 @@ acpi_status __init acpi_initialize_subsystem(void) return_ACPI_STATUS(status); } + /* Initialize the global OSI interfaces list with the static names */ + + status = acpi_ut_initialize_interfaces(); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "During OSI interfaces initialization")); + return_ACPI_STATUS(status); + } + /* If configured, initialize the AML debugger */ ACPI_DEBUGGER_EXEC(status = acpi_db_initialize()); @@ -506,6 +515,7 @@ acpi_install_initialization_handler(acpi_init_handler handler, u32 function) ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler) #endif /* ACPI_FUTURE_USAGE */ + /***************************************************************************** * * FUNCTION: acpi_purge_cached_objects @@ -529,4 +539,117 @@ acpi_status acpi_purge_cached_objects(void) } ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects) -#endif + +/***************************************************************************** + * + * FUNCTION: acpi_install_interface + * + * PARAMETERS: interface_name - The interface to install + * + * RETURN: Status + * + * DESCRIPTION: Install an _OSI interface to the global list + * + ****************************************************************************/ +acpi_status acpi_install_interface(acpi_string interface_name) +{ + acpi_status status; + struct acpi_interface_info *interface_info; + + /* Parameter validation */ + + if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) { + return (AE_BAD_PARAMETER); + } + + (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); + + /* Check if the interface name is already in the global list */ + + interface_info = acpi_ut_get_interface(interface_name); + if (interface_info) { + /* + * The interface already exists in the list. This is OK if the + * interface has been marked invalid -- just clear the bit. + */ + if (interface_info->flags & ACPI_OSI_INVALID) { + interface_info->flags &= ~ACPI_OSI_INVALID; + status = AE_OK; + } else { + status = AE_ALREADY_EXISTS; + } + } else { + /* New interface name, install into the global list */ + + status = acpi_ut_install_interface(interface_name); + } + + acpi_os_release_mutex(acpi_gbl_osi_mutex); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_install_interface) + +/***************************************************************************** + * + * FUNCTION: acpi_remove_interface + * + * PARAMETERS: interface_name - The interface to remove + * + * RETURN: Status + * + * DESCRIPTION: Remove an _OSI interface from the global list + * + ****************************************************************************/ +acpi_status acpi_remove_interface(acpi_string interface_name) +{ + acpi_status status; + + /* Parameter validation */ + + if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) { + return (AE_BAD_PARAMETER); + } + + (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); + + status = acpi_ut_remove_interface(interface_name); + + acpi_os_release_mutex(acpi_gbl_osi_mutex); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_remove_interface) + +/***************************************************************************** + * + * FUNCTION: acpi_install_interface_handler + * + * PARAMETERS: Handler - The _OSI interface handler to install + * NULL means "remove existing handler" + * + * RETURN: Status + * + * DESCRIPTION: Install a handler for the predefined _OSI ACPI method. + * invoked during execution of the internal implementation of + * _OSI. A NULL handler simply removes any existing handler. + * + ****************************************************************************/ +acpi_status acpi_install_interface_handler(acpi_interface_handler handler) +{ + acpi_status status = AE_OK; + + (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); + + if (handler && acpi_gbl_interface_handler) { + status = AE_ALREADY_EXISTS; + } else { + acpi_gbl_interface_handler = handler; + } + + acpi_os_release_mutex(acpi_gbl_osi_mutex); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_install_interface_handler) +#endif /* !ACPI_ASL_COMPILER */ diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 3fd6747..af109c7 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -96,7 +96,9 @@ static LIST_HEAD(resource_list_head); static DEFINE_SPINLOCK(acpi_res_lock); #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ -static char osi_additional_string[OSI_STRING_LENGTH_MAX]; +static char osi_setup_string[OSI_STRING_LENGTH_MAX]; + +static void __init acpi_osi_setup_late(void); /* * The story of _OSI(Linux) @@ -138,6 +140,20 @@ static struct osi_linux { unsigned int known:1; } osi_linux = { 0, 0, 0, 0}; +static u32 acpi_osi_handler(acpi_string interface, u32 supported) +{ + if (!strcmp("Linux", interface)) { + + printk(KERN_NOTICE PREFIX + "BIOS _OSI(Linux) query %s%s\n", + osi_linux.enable ? "honored" : "ignored", + osi_linux.cmdline ? " via cmdline" : + osi_linux.dmi ? " via DMI" : ""); + } + + return supported; +} + static void __init acpi_request_region (struct acpi_generic_address *addr, unsigned int length, char *desc) { @@ -199,6 +215,8 @@ acpi_status acpi_os_initialize1(void) BUG_ON(!kacpid_wq); BUG_ON(!kacpi_notify_wq); BUG_ON(!kacpi_hotplug_wq); + acpi_install_interface_handler(acpi_osi_handler); + acpi_osi_setup_late(); return AE_OK; } @@ -980,6 +998,12 @@ static void __init set_osi_linux(unsigned int enable) printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", enable ? "Add": "Delet"); } + + if (osi_linux.enable) + acpi_install_interface("Linux"); + else + acpi_remove_interface("Linux"); + return; } @@ -1014,21 +1038,33 @@ void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) * string starting with '!' disables that string * otherwise string is added to list, augmenting built-in strings */ -int __init acpi_osi_setup(char *str) +static void __init acpi_osi_setup_late(void) { - if (str == NULL || *str == '\0') { - printk(KERN_INFO PREFIX "_OSI method disabled\n"); - acpi_gbl_create_osi_method = FALSE; - } else if (!strcmp("!Linux", str)) { + char *str = osi_setup_string; + + if (*str == '\0') + return; + + if (!strcmp("!Linux", str)) { acpi_cmdline_osi_linux(0); /* !enable */ } else if (*str == '!') { - if (acpi_osi_invalidate(++str) == AE_OK) + if (acpi_remove_interface(++str) == AE_OK) printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); } else if (!strcmp("Linux", str)) { acpi_cmdline_osi_linux(1); /* enable */ - } else if (*osi_additional_string == '\0') { - strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); - printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); + } else { + if (acpi_install_interface(str) == AE_OK) + printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); + } +} + +int __init acpi_osi_setup(char *str) +{ + if (str == NULL || *str == '\0') { + printk(KERN_INFO PREFIX "_OSI method disabled\n"); + acpi_gbl_create_osi_method = FALSE; + } else { + strncpy(osi_setup_string, str, OSI_STRING_LENGTH_MAX); } return 1; @@ -1285,38 +1321,6 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) return (AE_OK); } -/****************************************************************************** - * - * FUNCTION: acpi_os_validate_interface - * - * PARAMETERS: interface - Requested interface to be validated - * - * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise - * - * DESCRIPTION: Match an interface string to the interfaces supported by the - * host. Strings originate from an AML call to the _OSI method. - * - *****************************************************************************/ - -acpi_status -acpi_os_validate_interface (char *interface) -{ - if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) - return AE_OK; - if (!strcmp("Linux", interface)) { - - printk(KERN_NOTICE PREFIX - "BIOS _OSI(Linux) query %s%s\n", - osi_linux.enable ? "honored" : "ignored", - osi_linux.cmdline ? " via cmdline" : - osi_linux.dmi ? " via DMI" : ""); - - if (osi_linux.enable) - return AE_OK; - } - return AE_SUPPORT; -} - static inline int acpi_res_list_add(struct acpi_res_list *res) { struct acpi_res_list *res_list_elem; diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h index 5e22577..c29b0af 100644 --- a/include/acpi/acpiosxf.h +++ b/include/acpi/acpiosxf.h @@ -239,9 +239,6 @@ acpi_os_derive_pci_id(acpi_handle device, /* * Miscellaneous */ -acpi_status acpi_os_validate_interface(char *interface); -acpi_status acpi_osi_invalidate(char* interface); - acpi_status acpi_os_validate_address(u8 space_id, acpi_physical_address address, acpi_size length, char *name); diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 81d4f3d..55164c7 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -105,6 +105,10 @@ const char *acpi_format_exception(acpi_status exception); acpi_status acpi_purge_cached_objects(void); +acpi_status acpi_install_interface(acpi_string interface_name); + +acpi_status acpi_remove_interface(acpi_string interface_name); + /* * ACPI Memory management */ @@ -263,6 +267,8 @@ acpi_remove_gpe_handler(acpi_handle gpe_device, acpi_status acpi_install_exception_handler(acpi_exception_handler handler); #endif +acpi_status acpi_install_interface_handler(acpi_interface_handler handler); + /* * Event interfaces */ diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 5db8f47..332d076 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -950,6 +950,9 @@ acpi_status(*acpi_walk_callback) (acpi_handle object, u32 nesting_level, void *context, void **return_value); +typedef +u32 (*acpi_interface_handler) (acpi_string interface_name, u32 supported); + /* Interrupt handler return values */ #define ACPI_INTERRUPT_NOT_HANDLED 0x00 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
