v4.19.13 snapshot.
diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
new file mode 100644
index 0000000..d77257d
--- /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);
+}