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 000000000000..b8633947391b
--- /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)