0,0 → 1,295 |
/****************************************************************************** |
* |
* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and |
* Address Spaces. |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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 "acnamesp.h" |
#include "acevents.h" |
|
#define _COMPONENT ACPI_EVENTS |
ACPI_MODULE_NAME("evxfregn") |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_install_address_space_handler |
* |
* PARAMETERS: device - Handle for the device |
* space_id - The address space ID |
* handler - Address of the handler |
* setup - Address of the setup function |
* context - Value passed to the handler on each access |
* |
* RETURN: Status |
* |
* DESCRIPTION: Install a handler for all op_regions of a given space_id. |
* |
* NOTE: This function should only be called after acpi_enable_subsystem has |
* been called. This is because any _REG methods associated with the Space ID |
* are executed here, and these methods can only be safely executed after |
* the default handlers have been installed and the hardware has been |
* initialized (via acpi_enable_subsystem.) |
* |
******************************************************************************/ |
acpi_status |
acpi_install_address_space_handler(acpi_handle device, |
acpi_adr_space_type space_id, |
acpi_adr_space_handler handler, |
acpi_adr_space_setup setup, void *context) |
{ |
struct acpi_namespace_node *node; |
acpi_status status; |
|
ACPI_FUNCTION_TRACE(acpi_install_address_space_handler); |
|
/* Parameter validation */ |
|
if (!device) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Convert and validate the device handle */ |
|
node = acpi_ns_validate_handle(device); |
if (!node) { |
status = AE_BAD_PARAMETER; |
goto unlock_and_exit; |
} |
|
/* Install the handler for all Regions for this Space ID */ |
|
status = |
acpi_ev_install_space_handler(node, space_id, handler, setup, |
context); |
if (ACPI_FAILURE(status)) { |
goto unlock_and_exit; |
} |
|
/* |
* For the default space_IDs, (the IDs for which there are default region handlers |
* installed) Only execute the _REG methods if the global initialization _REG |
* methods have already been run (via acpi_initialize_objects). In other words, |
* we will defer the execution of the _REG methods for these space_IDs until |
* execution of acpi_initialize_objects. This is done because we need the handlers |
* for the default spaces (mem/io/pci/table) to be installed before we can run |
* any control methods (or _REG methods). There is known BIOS code that depends |
* on this. |
* |
* For all other space_IDs, we can safely execute the _REG methods immediately. |
* This means that for IDs like embedded_controller, this function should be called |
* only after acpi_enable_subsystem has been called. |
*/ |
switch (space_id) { |
case ACPI_ADR_SPACE_SYSTEM_MEMORY: |
case ACPI_ADR_SPACE_SYSTEM_IO: |
case ACPI_ADR_SPACE_PCI_CONFIG: |
case ACPI_ADR_SPACE_DATA_TABLE: |
|
if (!acpi_gbl_reg_methods_executed) { |
|
/* We will defer execution of the _REG methods for this space */ |
goto unlock_and_exit; |
} |
break; |
|
default: |
|
break; |
} |
|
/* Run all _REG methods for this address space */ |
|
status = acpi_ev_execute_reg_methods(node, space_id); |
|
unlock_and_exit: |
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_remove_address_space_handler |
* |
* PARAMETERS: device - Handle for the device |
* space_id - The address space ID |
* handler - Address of the handler |
* |
* RETURN: Status |
* |
* DESCRIPTION: Remove a previously installed handler. |
* |
******************************************************************************/ |
acpi_status |
acpi_remove_address_space_handler(acpi_handle device, |
acpi_adr_space_type space_id, |
acpi_adr_space_handler handler) |
{ |
union acpi_operand_object *obj_desc; |
union acpi_operand_object *handler_obj; |
union acpi_operand_object *region_obj; |
union acpi_operand_object **last_obj_ptr; |
struct acpi_namespace_node *node; |
acpi_status status; |
|
ACPI_FUNCTION_TRACE(acpi_remove_address_space_handler); |
|
/* Parameter validation */ |
|
if (!device) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Convert and validate the device handle */ |
|
node = acpi_ns_validate_handle(device); |
if (!node || |
((node->type != ACPI_TYPE_DEVICE) && |
(node->type != ACPI_TYPE_PROCESSOR) && |
(node->type != ACPI_TYPE_THERMAL) && |
(node != acpi_gbl_root_node))) { |
status = AE_BAD_PARAMETER; |
goto unlock_and_exit; |
} |
|
/* Make sure the internal object exists */ |
|
obj_desc = acpi_ns_get_attached_object(node); |
if (!obj_desc) { |
status = AE_NOT_EXIST; |
goto unlock_and_exit; |
} |
|
/* Find the address handler the user requested */ |
|
handler_obj = obj_desc->device.handler; |
last_obj_ptr = &obj_desc->device.handler; |
while (handler_obj) { |
|
/* We have a handler, see if user requested this one */ |
|
if (handler_obj->address_space.space_id == space_id) { |
|
/* Handler must be the same as the installed handler */ |
|
if (handler_obj->address_space.handler != handler) { |
status = AE_BAD_PARAMETER; |
goto unlock_and_exit; |
} |
|
/* Matched space_id, first dereference this in the Regions */ |
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
"Removing address handler %p(%p) for region %s " |
"on Device %p(%p)\n", |
handler_obj, handler, |
acpi_ut_get_region_name(space_id), |
node, obj_desc)); |
|
region_obj = handler_obj->address_space.region_list; |
|
/* Walk the handler's region list */ |
|
while (region_obj) { |
/* |
* First disassociate the handler from the region. |
* |
* NOTE: this doesn't mean that the region goes away |
* The region is just inaccessible as indicated to |
* the _REG method |
*/ |
acpi_ev_detach_region(region_obj, TRUE); |
|
/* |
* Walk the list: Just grab the head because the |
* detach_region removed the previous head. |
*/ |
region_obj = |
handler_obj->address_space.region_list; |
|
} |
|
/* Remove this Handler object from the list */ |
|
*last_obj_ptr = handler_obj->address_space.next; |
|
/* Now we can delete the handler object */ |
|
acpi_ut_remove_reference(handler_obj); |
goto unlock_and_exit; |
} |
|
/* Walk the linked list of handlers */ |
|
last_obj_ptr = &handler_obj->address_space.next; |
handler_obj = handler_obj->address_space.next; |
} |
|
/* The handler does not exist */ |
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
"Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", |
handler, acpi_ut_get_region_name(space_id), space_id, |
node, obj_desc)); |
|
status = AE_NOT_EXIST; |
|
unlock_and_exit: |
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler) |