summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/evxfregn.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/acpica/evxfregn.c')
-rw-r--r--drivers/acpi/acpica/evxfregn.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxfregn.c b/drivers/acpi/acpica/evxfregn.c
new file mode 100644
index 00000000000..b8633947391
--- /dev/null
+++ b/drivers/acpi/acpica/evxfregn.c
@@ -0,0 +1,254 @@
+/******************************************************************************
+ *
+ * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
+ * Address Spaces.
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h>
+#include <acpi/acnamesp.h>
+#include <acpi/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.
+ *
+ ******************************************************************************/
+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_map_handle_to_node(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;
+ }
+
+ /* 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_map_handle_to_node(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)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 00:14:21 +0000