1 files changed, 607 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
new file mode 100644
index 000000000..b2cfdfef3
--- /dev/null
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -0,0 +1,607 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: nsxfname - Public interfaces to the ACPI subsystem
+ *                         ACPI Namespace oriented interfaces
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "acparser.h"
+#include "amlcode.h"
+
+#define _COMPONENT          ACPI_NAMESPACE
+ACPI_MODULE_NAME("nsxfname")
+
+/* Local prototypes */
+static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest,
+				    struct acpi_pnp_device_id *source,
+				    char *string_area);
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_handle
+ *
+ * PARAMETERS:  parent          - Object to search under (search scope).
+ *              pathname        - Pointer to an asciiz string containing the
+ *                                name
+ *              ret_handle      - Where the return handle is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This routine will search for a caller specified name in the
+ *              name space. The caller can restrict the search region by
+ *              specifying a non NULL parent. The parent value is itself a
+ *              namespace handle.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_handle(acpi_handle parent,
+		acpi_string pathname, acpi_handle *ret_handle)
+{
+	acpi_status status;
+	struct acpi_namespace_node *node = NULL;
+	struct acpi_namespace_node *prefix_node = NULL;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Parameter Validation */
+
+	if (!ret_handle || !pathname) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Convert a parent handle to a prefix node */
+
+	if (parent) {
+		prefix_node = acpi_ns_validate_handle(parent);
+		if (!prefix_node) {
+			return (AE_BAD_PARAMETER);
+		}
+	}
+
+	/*
+	 * Valid cases are:
+	 * 1) Fully qualified pathname
+	 * 2) Parent + Relative pathname
+	 *
+	 * Error for <null Parent + relative path>
+	 */
+	if (ACPI_IS_ROOT_PREFIX(pathname[0])) {
+
+		/* Pathname is fully qualified (starts with '\') */
+
+		/* Special case for root-only, since we can't search for it */
+
+		if (!strcmp(pathname, ACPI_NS_ROOT_PATH)) {
+			*ret_handle =
+			    ACPI_CAST_PTR(acpi_handle, acpi_gbl_root_node);
+			return (AE_OK);
+		}
+	} else if (!prefix_node) {
+
+		/* Relative path with null prefix is disallowed */
+
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Find the Node and convert to a handle */
+
+	status =
+	    acpi_ns_get_node(prefix_node, pathname, ACPI_NS_NO_UPSEARCH, &node);
+	if (ACPI_SUCCESS(status)) {
+		*ret_handle = ACPI_CAST_PTR(acpi_handle, node);
+	}
+
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_handle)
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_name
+ *
+ * PARAMETERS:  handle          - Handle to be converted to a pathname
+ *              name_type       - Full pathname or single segment
+ *              buffer          - Buffer for returned path
+ *
+ * RETURN:      Pointer to a string containing the fully qualified Name.
+ *
+ * DESCRIPTION: This routine returns the fully qualified name associated with
+ *              the Handle parameter. This and the acpi_pathname_to_handle are
+ *              complementary functions.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_get_name(acpi_handle handle, u32 name_type, struct acpi_buffer *buffer)
+{
+	acpi_status status;
+
+	/* Parameter validation */
+
+	if (name_type > ACPI_NAME_TYPE_MAX) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_validate_buffer(buffer);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/*
+	 * Wants the single segment ACPI name.
+	 * Validate handle and convert to a namespace Node
+	 */
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	if (name_type == ACPI_FULL_PATHNAME ||
+	    name_type == ACPI_FULL_PATHNAME_NO_TRAILING) {
+
+		/* Get the full pathname (From the namespace root) */
+
+		status = acpi_ns_handle_to_pathname(handle, buffer,
+						    name_type ==
+						    ACPI_FULL_PATHNAME ? FALSE :
+						    TRUE);
+	} else {
+		/* Get the single name */
+
+		status = acpi_ns_handle_to_name(handle, buffer);
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_name)
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_copy_device_id
+ *
+ * PARAMETERS:  dest                - Pointer to the destination PNP_DEVICE_ID
+ *              source              - Pointer to the source PNP_DEVICE_ID
+ *              string_area         - Pointer to where to copy the dest string
+ *
+ * RETURN:      Pointer to the next string area
+ *
+ * DESCRIPTION: Copy a single PNP_DEVICE_ID, including the string data.
+ *
+ ******************************************************************************/
+static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest,
+				    struct acpi_pnp_device_id *source,
+				    char *string_area)
+{
+	/* Create the destination PNP_DEVICE_ID */
+
+	dest->string = string_area;
+	dest->length = source->length;
+
+	/* Copy actual string and return a pointer to the next string area */
+
+	memcpy(string_area, source->string, source->length);
+	return (string_area + source->length);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_object_info
+ *
+ * PARAMETERS:  handle              - Object Handle
+ *              return_buffer       - Where the info is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Returns information about an object as gleaned from the
+ *              namespace node and possibly by running several standard
+ *              control methods (Such as in the case of a device.)
+ *
+ * For Device and Processor objects, run the Device _HID, _UID, _CID,
+ * _CLS, _ADR, _sx_w, and _sx_d methods.
+ *
+ * Note: Allocates the return buffer, must be freed by the caller.
+ *
+ * Note: This interface is intended to be used during the initial device
+ * discovery namespace traversal. Therefore, no complex methods can be
+ * executed, especially those that access operation regions. Therefore, do
+ * not add any additional methods that could cause problems in this area.
+ * Because of this reason support for the following methods has been removed:
+ * 1) _SUB method was removed (11/2015)
+ * 2) _STA method was removed (02/2018)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_object_info(acpi_handle handle,
+		     struct acpi_device_info **return_buffer)
+{
+	struct acpi_namespace_node *node;
+	struct acpi_device_info *info;
+	struct acpi_pnp_device_id_list *cid_list = NULL;
+	struct acpi_pnp_device_id *hid = NULL;
+	struct acpi_pnp_device_id *uid = NULL;
+	struct acpi_pnp_device_id *cls = NULL;
+	char *next_id_string;
+	acpi_object_type type;
+	acpi_name name;
+	u8 param_count = 0;
+	u16 valid = 0;
+	u32 info_size;
+	u32 i;
+	acpi_status status;
+
+	/* Parameter validation */
+
+	if (!handle || !return_buffer) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	node = acpi_ns_validate_handle(handle);
+	if (!node) {
+		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Get the namespace node data while the namespace is locked */
+
+	info_size = sizeof(struct acpi_device_info);
+	type = node->type;
+	name = node->name.integer;
+
+	if (node->type == ACPI_TYPE_METHOD) {
+		param_count = node->object->method.param_count;
+	}
+
+	status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
+		/*
+		 * Get extra info for ACPI Device/Processor objects only:
+		 * Run the Device _HID, _UID, _CLS, and _CID methods.
+		 *
+		 * Note: none of these methods are required, so they may or may
+		 * not be present for this device. The Info->Valid bitfield is used
+		 * to indicate which methods were found and run successfully.
+		 */
+
+		/* Execute the Device._HID method */
+
+		status = acpi_ut_execute_HID(node, &hid);
+		if (ACPI_SUCCESS(status)) {
+			info_size += hid->length;
+			valid |= ACPI_VALID_HID;
+		}
+
+		/* Execute the Device._UID method */
+
+		status = acpi_ut_execute_UID(node, &uid);
+		if (ACPI_SUCCESS(status)) {
+			info_size += uid->length;
+			valid |= ACPI_VALID_UID;
+		}
+
+		/* Execute the Device._CID method */
+
+		status = acpi_ut_execute_CID(node, &cid_list);
+		if (ACPI_SUCCESS(status)) {
+
+			/* Add size of CID strings and CID pointer array */
+
+			info_size +=
+			    (cid_list->list_size -
+			     sizeof(struct acpi_pnp_device_id_list));
+			valid |= ACPI_VALID_CID;
+		}
+
+		/* Execute the Device._CLS method */
+
+		status = acpi_ut_execute_CLS(node, &cls);
+		if (ACPI_SUCCESS(status)) {
+			info_size += cls->length;
+			valid |= ACPI_VALID_CLS;
+		}
+	}
+
+	/*
+	 * Now that we have the variable-length data, we can allocate the
+	 * return buffer
+	 */
+	info = ACPI_ALLOCATE_ZEROED(info_size);
+	if (!info) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/* Get the fixed-length data */
+
+	if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
+		/*
+		 * Get extra info for ACPI Device/Processor objects only:
+		 * Run the _ADR and, sx_w, and _sx_d methods.
+		 *
+		 * Notes: none of these methods are required, so they may or may
+		 * not be present for this device. The Info->Valid bitfield is used
+		 * to indicate which methods were found and run successfully.
+		 */
+
+		/* Execute the Device._ADR method */
+
+		status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, node,
+							 &info->address);
+		if (ACPI_SUCCESS(status)) {
+			valid |= ACPI_VALID_ADR;
+		}
+
+		/* Execute the Device._sx_w methods */
+
+		status = acpi_ut_execute_power_methods(node,
+						       acpi_gbl_lowest_dstate_names,
+						       ACPI_NUM_sx_w_METHODS,
+						       info->lowest_dstates);
+		if (ACPI_SUCCESS(status)) {
+			valid |= ACPI_VALID_SXWS;
+		}
+
+		/* Execute the Device._sx_d methods */
+
+		status = acpi_ut_execute_power_methods(node,
+						       acpi_gbl_highest_dstate_names,
+						       ACPI_NUM_sx_d_METHODS,
+						       info->highest_dstates);
+		if (ACPI_SUCCESS(status)) {
+			valid |= ACPI_VALID_SXDS;
+		}
+	}
+
+	/*
+	 * Create a pointer to the string area of the return buffer.
+	 * Point to the end of the base struct acpi_device_info structure.
+	 */
+	next_id_string = ACPI_CAST_PTR(char, info->compatible_id_list.ids);
+	if (cid_list) {
+
+		/* Point past the CID PNP_DEVICE_ID array */
+
+		next_id_string +=
+		    ((acpi_size)cid_list->count *
+		     sizeof(struct acpi_pnp_device_id));
+	}
+
+	/*
+	 * Copy the HID, UID, and CIDs to the return buffer. The variable-length
+	 * strings are copied to the reserved area at the end of the buffer.
+	 *
+	 * For HID and CID, check if the ID is a PCI Root Bridge.
+	 */
+	if (hid) {
+		next_id_string = acpi_ns_copy_device_id(&info->hardware_id,
+							hid, next_id_string);
+
+		if (acpi_ut_is_pci_root_bridge(hid->string)) {
+			info->flags |= ACPI_PCI_ROOT_BRIDGE;
+		}
+	}
+
+	if (uid) {
+		next_id_string = acpi_ns_copy_device_id(&info->unique_id,
+							uid, next_id_string);
+	}
+
+	if (cid_list) {
+		info->compatible_id_list.count = cid_list->count;
+		info->compatible_id_list.list_size = cid_list->list_size;
+
+		/* Copy each CID */
+
+		for (i = 0; i < cid_list->count; i++) {
+			next_id_string =
+			    acpi_ns_copy_device_id(&info->compatible_id_list.
+						   ids[i], &cid_list->ids[i],
+						   next_id_string);
+
+			if (acpi_ut_is_pci_root_bridge(cid_list->ids[i].string)) {
+				info->flags |= ACPI_PCI_ROOT_BRIDGE;
+			}
+		}
+	}
+
+	if (cls) {
+		(void)acpi_ns_copy_device_id(&info->class_code,
+					     cls, next_id_string);
+	}
+
+	/* Copy the fixed-length data */
+
+	info->info_size = info_size;
+	info->type = type;
+	info->name = name;
+	info->param_count = param_count;
+	info->valid = valid;
+
+	*return_buffer = info;
+	status = AE_OK;
+
+cleanup:
+	if (hid) {
+		ACPI_FREE(hid);
+	}
+	if (uid) {
+		ACPI_FREE(uid);
+	}
+	if (cid_list) {
+		ACPI_FREE(cid_list);
+	}
+	if (cls) {
+		ACPI_FREE(cls);
+	}
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_object_info)
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_install_method
+ *
+ * PARAMETERS:  buffer         - An ACPI table containing one control method
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a control method into the namespace. If the method
+ *              name already exists in the namespace, it is overwritten. The
+ *              input buffer must contain a valid DSDT or SSDT containing a
+ *              single control method.
+ *
+ ******************************************************************************/
+acpi_status acpi_install_method(u8 *buffer)
+{
+	struct acpi_table_header *table =
+	    ACPI_CAST_PTR(struct acpi_table_header, buffer);
+	u8 *aml_buffer;
+	u8 *aml_start;
+	char *path;
+	struct acpi_namespace_node *node;
+	union acpi_operand_object *method_obj;
+	struct acpi_parse_state parser_state;
+	u32 aml_length;
+	u16 opcode;
+	u8 method_flags;
+	acpi_status status;
+
+	/* Parameter validation */
+
+	if (!buffer) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Table must be a DSDT or SSDT */
+
+	if (!ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_DSDT) &&
+	    !ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_SSDT)) {
+		return (AE_BAD_HEADER);
+	}
+
+	/* First AML opcode in the table must be a control method */
+
+	parser_state.aml = buffer + sizeof(struct acpi_table_header);
+	opcode = acpi_ps_peek_opcode(&parser_state);
+	if (opcode != AML_METHOD_OP) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Extract method information from the raw AML */
+
+	parser_state.aml += acpi_ps_get_opcode_size(opcode);
+	parser_state.pkg_end = acpi_ps_get_next_package_end(&parser_state);
+	path = acpi_ps_get_next_namestring(&parser_state);
+
+	method_flags = *parser_state.aml++;
+	aml_start = parser_state.aml;
+	aml_length = (u32)ACPI_PTR_DIFF(parser_state.pkg_end, aml_start);
+
+	/*
+	 * Allocate resources up-front. We don't want to have to delete a new
+	 * node from the namespace if we cannot allocate memory.
+	 */
+	aml_buffer = ACPI_ALLOCATE(aml_length);
+	if (!aml_buffer) {
+		return (AE_NO_MEMORY);
+	}
+
+	method_obj = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
+	if (!method_obj) {
+		ACPI_FREE(aml_buffer);
+		return (AE_NO_MEMORY);
+	}
+
+	/* Lock namespace for acpi_ns_lookup, we may be creating a new node */
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		goto error_exit;
+	}
+
+	/* The lookup either returns an existing node or creates a new one */
+
+	status =
+	    acpi_ns_lookup(NULL, path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1,
+			   ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND,
+			   NULL, &node);
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+	if (ACPI_FAILURE(status)) {	/* ns_lookup */
+		if (status != AE_ALREADY_EXISTS) {
+			goto error_exit;
+		}
+
+		/* Node existed previously, make sure it is a method node */
+
+		if (node->type != ACPI_TYPE_METHOD) {
+			status = AE_TYPE;
+			goto error_exit;
+		}
+	}
+
+	/* Copy the method AML to the local buffer */
+
+	memcpy(aml_buffer, aml_start, aml_length);
+
+	/* Initialize the method object with the new method's information */
+
+	method_obj->method.aml_start = aml_buffer;
+	method_obj->method.aml_length = aml_length;
+
+	method_obj->method.param_count = (u8)
+	    (method_flags & AML_METHOD_ARG_COUNT);
+
+	if (method_flags & AML_METHOD_SERIALIZED) {
+		method_obj->method.info_flags = ACPI_METHOD_SERIALIZED;
+
+		method_obj->method.sync_level = (u8)
+		    ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
+	}
+
+	/*
+	 * Now that it is complete, we can attach the new method object to
+	 * the method Node (detaches/deletes any existing object)
+	 */
+	status = acpi_ns_attach_object(node, method_obj, ACPI_TYPE_METHOD);
+
+	/*
+	 * Flag indicates AML buffer is dynamic, must be deleted later.
+	 * Must be set only after attach above.
+	 */
+	node->flags |= ANOBJ_ALLOCATED_BUFFER;
+
+	/* Remove local reference to the method object */
+
+	acpi_ut_remove_reference(method_obj);
+	return (status);
+
+error_exit:
+
+	ACPI_FREE(aml_buffer);
+	ACPI_FREE(method_obj);
+	return (status);
+}
+ACPI_EXPORT_SYMBOL(acpi_install_method)