Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 230 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evxfregn.c b/drivers/acpi/acpica/evxfregn.c
new file mode 100644
index 000000000..3bb06f17a
--- /dev/null
+++ b/drivers/acpi/acpica/evxfregn.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
+ *                         Address Spaces.
+ *
+ * Copyright (C) 2000 - 2020, Intel Corp.
+ *
+ *****************************************************************************/
+
+#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;
+	}
+
+	/* Run all _REG methods for this address space */
+
+	acpi_ev_execute_reg_methods(node, space_id, ACPI_REG_CONNECT);
+
+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->common_notify.handler;
+	last_obj_ptr = &obj_desc->common_notify.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_os_release_mutex(handler_obj->address_space.
+					      context_mutex);
+			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)