296 lines
9.1 KiB
C
296 lines
9.1 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
|
|
* Address Spaces.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2014, 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)
|