Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 690 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
new file mode 100644
index 000000000..d77257d1c
--- /dev/null
+++ b/drivers/acpi/acpica/nsinit.c
@@ -0,0 +1,690 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: nsinit - namespace initialization
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_NAMESPACE
+ACPI_MODULE_NAME("nsinit")
+
+/* Local prototypes */
+static acpi_status
+acpi_ns_init_one_object(acpi_handle obj_handle,
+			u32 level, void *context, void **return_value);
+
+static acpi_status
+acpi_ns_init_one_device(acpi_handle obj_handle,
+			u32 nesting_level, void *context, void **return_value);
+
+static acpi_status
+acpi_ns_find_ini_methods(acpi_handle obj_handle,
+			 u32 nesting_level, void *context, void **return_value);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_initialize_objects
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk the entire namespace and perform any necessary
+ *              initialization on the objects found therein
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ns_initialize_objects(void)
+{
+	acpi_status status;
+	struct acpi_init_walk_info info;
+
+	ACPI_FUNCTION_TRACE(ns_initialize_objects);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+			  "[Init] Completing Initialization of ACPI Objects\n"));
+	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+			  "**** Starting initialization of namespace objects ****\n"));
+	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+			      "Completing Region/Field/Buffer/Package initialization:\n"));
+
+	/* Set all init info to zero */
+
+	memset(&info, 0, sizeof(struct acpi_init_walk_info));
+
+	/* Walk entire namespace from the supplied root */
+
+	status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+				     ACPI_UINT32_MAX, acpi_ns_init_one_object,
+				     NULL, &info, NULL);
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
+	}
+
+	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+			      "    Initialized %u/%u Regions %u/%u Fields %u/%u "
+			      "Buffers %u/%u Packages (%u nodes)\n",
+			      info.op_region_init, info.op_region_count,
+			      info.field_init, info.field_count,
+			      info.buffer_init, info.buffer_count,
+			      info.package_init, info.package_count,
+			      info.object_count));
+
+	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+			  "%u Control Methods found\n%u Op Regions found\n",
+			  info.method_count, info.op_region_count));
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_initialize_devices
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      acpi_status
+ *
+ * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
+ *              This means running _INI on all present devices.
+ *
+ *              Note: We install PCI config space handler on region access,
+ *              not here.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ns_initialize_devices(u32 flags)
+{
+	acpi_status status = AE_OK;
+	struct acpi_device_walk_info info;
+	acpi_handle handle;
+
+	ACPI_FUNCTION_TRACE(ns_initialize_devices);
+
+	if (!(flags & ACPI_NO_DEVICE_INIT)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "[Init] Initializing ACPI Devices\n"));
+
+		/* Init counters */
+
+		info.device_count = 0;
+		info.num_STA = 0;
+		info.num_INI = 0;
+
+		ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+				      "Initializing Device/Processor/Thermal objects "
+				      "and executing _INI/_STA methods:\n"));
+
+		/* Tree analysis: find all subtrees that contain _INI methods */
+
+		status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+						ACPI_UINT32_MAX, FALSE,
+						acpi_ns_find_ini_methods, NULL,
+						&info, NULL);
+		if (ACPI_FAILURE(status)) {
+			goto error_exit;
+		}
+
+		/* Allocate the evaluation information block */
+
+		info.evaluate_info =
+		    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
+		if (!info.evaluate_info) {
+			status = AE_NO_MEMORY;
+			goto error_exit;
+		}
+
+		/*
+		 * Execute the "global" _INI method that may appear at the root.
+		 * This support is provided for Windows compatibility (Vista+) and
+		 * is not part of the ACPI specification.
+		 */
+		info.evaluate_info->prefix_node = acpi_gbl_root_node;
+		info.evaluate_info->relative_pathname = METHOD_NAME__INI;
+		info.evaluate_info->parameters = NULL;
+		info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+		status = acpi_ns_evaluate(info.evaluate_info);
+		if (ACPI_SUCCESS(status)) {
+			info.num_INI++;
+		}
+
+		/*
+		 * Execute \_SB._INI.
+		 * There appears to be a strict order requirement for \_SB._INI,
+		 * which should be evaluated before any _REG evaluations.
+		 */
+		status = acpi_get_handle(NULL, "\\_SB", &handle);
+		if (ACPI_SUCCESS(status)) {
+			memset(info.evaluate_info, 0,
+			       sizeof(struct acpi_evaluate_info));
+			info.evaluate_info->prefix_node = handle;
+			info.evaluate_info->relative_pathname =
+			    METHOD_NAME__INI;
+			info.evaluate_info->parameters = NULL;
+			info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+			status = acpi_ns_evaluate(info.evaluate_info);
+			if (ACPI_SUCCESS(status)) {
+				info.num_INI++;
+			}
+		}
+	}
+
+	/*
+	 * Run all _REG methods
+	 *
+	 * Note: Any objects accessed by the _REG methods will be automatically
+	 * initialized, even if they contain executable AML (see the call to
+	 * acpi_ns_initialize_objects below).
+	 *
+	 * Note: According to the ACPI specification, we actually needn't execute
+	 * _REG for system_memory/system_io operation regions, but for PCI_Config
+	 * operation regions, it is required to evaluate _REG for those on a PCI
+	 * root bus that doesn't contain _BBN object. So this code is kept here
+	 * in order not to break things.
+	 */
+	if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "[Init] Executing _REG OpRegion methods\n"));
+
+		status = acpi_ev_initialize_op_regions();
+		if (ACPI_FAILURE(status)) {
+			goto error_exit;
+		}
+	}
+
+	if (!(flags & ACPI_NO_DEVICE_INIT)) {
+
+		/* Walk namespace to execute all _INIs on present devices */
+
+		status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+						ACPI_UINT32_MAX, FALSE,
+						acpi_ns_init_one_device, NULL,
+						&info, NULL);
+
+		/*
+		 * Any _OSI requests should be completed by now. If the BIOS has
+		 * requested any Windows OSI strings, we will always truncate
+		 * I/O addresses to 16 bits -- for Windows compatibility.
+		 */
+		if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
+			acpi_gbl_truncate_io_addresses = TRUE;
+		}
+
+		ACPI_FREE(info.evaluate_info);
+		if (ACPI_FAILURE(status)) {
+			goto error_exit;
+		}
+
+		ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+				      "    Executed %u _INI methods requiring %u _STA executions "
+				      "(examined %u objects)\n",
+				      info.num_INI, info.num_STA,
+				      info.device_count));
+	}
+
+	return_ACPI_STATUS(status);
+
+error_exit:
+	ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_init_one_package
+ *
+ * PARAMETERS:  obj_handle      - Node
+ *              level           - Current nesting level
+ *              context         - Not used
+ *              return_value    - Not used
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every package
+ *              within the namespace. Used during dynamic load of an SSDT.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_init_one_package(acpi_handle obj_handle,
+			 u32 level, void *context, void **return_value)
+{
+	acpi_status status;
+	union acpi_operand_object *obj_desc;
+	struct acpi_namespace_node *node =
+	    (struct acpi_namespace_node *)obj_handle;
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+		return (AE_OK);
+	}
+
+	/* Exit if package is already initialized */
+
+	if (obj_desc->package.flags & AOPOBJ_DATA_VALID) {
+		return (AE_OK);
+	}
+
+	status = acpi_ds_get_package_arguments(obj_desc);
+	if (ACPI_FAILURE(status)) {
+		return (AE_OK);
+	}
+
+	status =
+	    acpi_ut_walk_package_tree(obj_desc, NULL,
+				      acpi_ds_init_package_element, NULL);
+	if (ACPI_FAILURE(status)) {
+		return (AE_OK);
+	}
+
+	obj_desc->package.flags |= AOPOBJ_DATA_VALID;
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_init_one_object
+ *
+ * PARAMETERS:  obj_handle      - Node
+ *              level           - Current nesting level
+ *              context         - Points to a init info struct
+ *              return_value    - Not used
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
+ *              within the namespace.
+ *
+ *              Currently, the only objects that require initialization are:
+ *              1) Methods
+ *              2) Op Regions
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_init_one_object(acpi_handle obj_handle,
+			u32 level, void *context, void **return_value)
+{
+	acpi_object_type type;
+	acpi_status status = AE_OK;
+	struct acpi_init_walk_info *info =
+	    (struct acpi_init_walk_info *)context;
+	struct acpi_namespace_node *node =
+	    (struct acpi_namespace_node *)obj_handle;
+	union acpi_operand_object *obj_desc;
+
+	ACPI_FUNCTION_NAME(ns_init_one_object);
+
+	info->object_count++;
+
+	/* And even then, we are only interested in a few object types */
+
+	type = acpi_ns_get_type(obj_handle);
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+		return (AE_OK);
+	}
+
+	/* Increment counters for object types we are looking for */
+
+	switch (type) {
+	case ACPI_TYPE_REGION:
+
+		info->op_region_count++;
+		break;
+
+	case ACPI_TYPE_BUFFER_FIELD:
+
+		info->field_count++;
+		break;
+
+	case ACPI_TYPE_LOCAL_BANK_FIELD:
+
+		info->field_count++;
+		break;
+
+	case ACPI_TYPE_BUFFER:
+
+		info->buffer_count++;
+		break;
+
+	case ACPI_TYPE_PACKAGE:
+
+		info->package_count++;
+		break;
+
+	default:
+
+		/* No init required, just exit now */
+
+		return (AE_OK);
+	}
+
+	/* If the object is already initialized, nothing else to do */
+
+	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
+		return (AE_OK);
+	}
+
+	/* Must lock the interpreter before executing AML code */
+
+	acpi_ex_enter_interpreter();
+
+	/*
+	 * Each of these types can contain executable AML code within the
+	 * declaration.
+	 */
+	switch (type) {
+	case ACPI_TYPE_REGION:
+
+		info->op_region_init++;
+		status = acpi_ds_get_region_arguments(obj_desc);
+		break;
+
+	case ACPI_TYPE_BUFFER_FIELD:
+
+		info->field_init++;
+		status = acpi_ds_get_buffer_field_arguments(obj_desc);
+		break;
+
+	case ACPI_TYPE_LOCAL_BANK_FIELD:
+
+		info->field_init++;
+		status = acpi_ds_get_bank_field_arguments(obj_desc);
+		break;
+
+	case ACPI_TYPE_BUFFER:
+
+		info->buffer_init++;
+		status = acpi_ds_get_buffer_arguments(obj_desc);
+		break;
+
+	case ACPI_TYPE_PACKAGE:
+
+		/* Complete the initialization/resolution of the package object */
+
+		info->package_init++;
+		status =
+		    acpi_ns_init_one_package(obj_handle, level, NULL, NULL);
+		break;
+
+	default:
+
+		/* No other types can get here */
+
+		break;
+	}
+
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Could not execute arguments for [%4.4s] (%s)",
+				acpi_ut_get_node_name(node),
+				acpi_ut_get_type_name(type)));
+	}
+
+	/*
+	 * We ignore errors from above, and always return OK, since we don't want
+	 * to abort the walk on any single error.
+	 */
+	acpi_ex_exit_interpreter();
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_find_ini_methods
+ *
+ * PARAMETERS:  acpi_walk_callback
+ *
+ * RETURN:      acpi_status
+ *
+ * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
+ *              device/processor/thermal objects, and marks the entire subtree
+ *              with a SUBTREE_HAS_INI flag. This flag is used during the
+ *              subsequent device initialization walk to avoid entire subtrees
+ *              that do not contain an _INI.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_find_ini_methods(acpi_handle obj_handle,
+			 u32 nesting_level, void *context, void **return_value)
+{
+	struct acpi_device_walk_info *info =
+	    ACPI_CAST_PTR(struct acpi_device_walk_info, context);
+	struct acpi_namespace_node *node;
+	struct acpi_namespace_node *parent_node;
+
+	/* Keep count of device/processor/thermal objects */
+
+	node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+	if ((node->type == ACPI_TYPE_DEVICE) ||
+	    (node->type == ACPI_TYPE_PROCESSOR) ||
+	    (node->type == ACPI_TYPE_THERMAL)) {
+		info->device_count++;
+		return (AE_OK);
+	}
+
+	/* We are only looking for methods named _INI */
+
+	if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) {
+		return (AE_OK);
+	}
+
+	/*
+	 * The only _INI methods that we care about are those that are
+	 * present under Device, Processor, and Thermal objects.
+	 */
+	parent_node = node->parent;
+	switch (parent_node->type) {
+	case ACPI_TYPE_DEVICE:
+	case ACPI_TYPE_PROCESSOR:
+	case ACPI_TYPE_THERMAL:
+
+		/* Mark parent and bubble up the INI present flag to the root */
+
+		while (parent_node) {
+			parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
+			parent_node = parent_node->parent;
+		}
+		break;
+
+	default:
+
+		break;
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_init_one_device
+ *
+ * PARAMETERS:  acpi_walk_callback
+ *
+ * RETURN:      acpi_status
+ *
+ * DESCRIPTION: This is called once per device soon after ACPI is enabled
+ *              to initialize each device. It determines if the device is
+ *              present, and if so, calls _INI.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_init_one_device(acpi_handle obj_handle,
+			u32 nesting_level, void *context, void **return_value)
+{
+	struct acpi_device_walk_info *walk_info =
+	    ACPI_CAST_PTR(struct acpi_device_walk_info, context);
+	struct acpi_evaluate_info *info = walk_info->evaluate_info;
+	u32 flags;
+	acpi_status status;
+	struct acpi_namespace_node *device_node;
+
+	ACPI_FUNCTION_TRACE(ns_init_one_device);
+
+	/* We are interested in Devices, Processors and thermal_zones only */
+
+	device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+	if ((device_node->type != ACPI_TYPE_DEVICE) &&
+	    (device_node->type != ACPI_TYPE_PROCESSOR) &&
+	    (device_node->type != ACPI_TYPE_THERMAL)) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Because of an earlier namespace analysis, all subtrees that contain an
+	 * _INI method are tagged.
+	 *
+	 * If this device subtree does not contain any _INI methods, we
+	 * can exit now and stop traversing this entire subtree.
+	 */
+	if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
+		return_ACPI_STATUS(AE_CTRL_DEPTH);
+	}
+
+	/*
+	 * Run _STA to determine if this device is present and functioning. We
+	 * must know this information for two important reasons (from ACPI spec):
+	 *
+	 * 1) We can only run _INI if the device is present.
+	 * 2) We must abort the device tree walk on this subtree if the device is
+	 *    not present and is not functional (we will not examine the children)
+	 *
+	 * The _STA method is not required to be present under the device, we
+	 * assume the device is present if _STA does not exist.
+	 */
+	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
+			(ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
+
+	status = acpi_ut_execute_STA(device_node, &flags);
+	if (ACPI_FAILURE(status)) {
+
+		/* Ignore error and move on to next device */
+
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Flags == -1 means that _STA was not found. In this case, we assume that
+	 * the device is both present and functional.
+	 *
+	 * From the ACPI spec, description of _STA:
+	 *
+	 * "If a device object (including the processor object) does not have an
+	 * _STA object, then OSPM assumes that all of the above bits are set (in
+	 * other words, the device is present, ..., and functioning)"
+	 */
+	if (flags != ACPI_UINT32_MAX) {
+		walk_info->num_STA++;
+	}
+
+	/*
+	 * Examine the PRESENT and FUNCTIONING status bits
+	 *
+	 * Note: ACPI spec does not seem to specify behavior for the present but
+	 * not functioning case, so we assume functioning if present.
+	 */
+	if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
+
+		/* Device is not present, we must examine the Functioning bit */
+
+		if (flags & ACPI_STA_DEVICE_FUNCTIONING) {
+			/*
+			 * Device is not present but is "functioning". In this case,
+			 * we will not run _INI, but we continue to examine the children
+			 * of this device.
+			 *
+			 * From the ACPI spec, description of _STA: (note - no mention
+			 * of whether to run _INI or not on the device in question)
+			 *
+			 * "_STA may return bit 0 clear (not present) with bit 3 set
+			 * (device is functional). This case is used to indicate a valid
+			 * device for which no device driver should be loaded (for example,
+			 * a bridge device.) Children of this device may be present and
+			 * valid. OSPM should continue enumeration below a device whose
+			 * _STA returns this bit combination"
+			 */
+			return_ACPI_STATUS(AE_OK);
+		} else {
+			/*
+			 * Device is not present and is not functioning. We must abort the
+			 * walk of this subtree immediately -- don't look at the children
+			 * of such a device.
+			 *
+			 * From the ACPI spec, description of _INI:
+			 *
+			 * "If the _STA method indicates that the device is not present,
+			 * OSPM will not run the _INI and will not examine the children
+			 * of the device for _INI methods"
+			 */
+			return_ACPI_STATUS(AE_CTRL_DEPTH);
+		}
+	}
+
+	/*
+	 * The device is present or is assumed present if no _STA exists.
+	 * Run the _INI if it exists (not required to exist)
+	 *
+	 * Note: We know there is an _INI within this subtree, but it may not be
+	 * under this particular device, it may be lower in the branch.
+	 */
+	if (!ACPI_COMPARE_NAME(device_node->name.ascii, "_SB_") ||
+	    device_node->parent != acpi_gbl_root_node) {
+		ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
+				(ACPI_TYPE_METHOD, device_node,
+				 METHOD_NAME__INI));
+
+		memset(info, 0, sizeof(struct acpi_evaluate_info));
+		info->prefix_node = device_node;
+		info->relative_pathname = METHOD_NAME__INI;
+		info->parameters = NULL;
+		info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+		status = acpi_ns_evaluate(info);
+		if (ACPI_SUCCESS(status)) {
+			walk_info->num_INI++;
+		}
+#ifdef ACPI_DEBUG_OUTPUT
+		else if (status != AE_NOT_FOUND) {
+
+			/* Ignore error and move on to next device */
+
+			char *scope_name =
+			    acpi_ns_get_normalized_pathname(device_node, TRUE);
+
+			ACPI_EXCEPTION((AE_INFO, status,
+					"during %s._INI execution",
+					scope_name));
+			ACPI_FREE(scope_name);
+		}
+#endif
+	}
+
+	/* Ignore errors from above */
+
+	status = AE_OK;
+
+	/*
+	 * The _INI method has been run if present; call the Global Initialization
+	 * Handler for this device.
+	 */
+	if (acpi_gbl_init_handler) {
+		status =
+		    acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI);
+	}
+
+	return_ACPI_STATUS(status);
+}