Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 335 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
new file mode 100644
index 000000000..f26bcbbc2
--- /dev/null
+++ b/drivers/acpi/acpica/psxface.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: psxface - Parser external interfaces
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "actables.h"
+#include "acnamesp.h"
+
+#define _COMPONENT          ACPI_PARSER
+ACPI_MODULE_NAME("psxface")
+
+/* Local Prototypes */
+static void
+acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_debug_trace
+ *
+ * PARAMETERS:  method_name     - Valid ACPI name string
+ *              debug_level     - Optional level mask. 0 to use default
+ *              debug_layer     - Optional layer mask. 0 to use default
+ *              flags           - bit 1: one shot(1) or persistent(0)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: External interface to enable debug tracing during control
+ *              method execution
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags)
+{
+	acpi_status status;
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	acpi_gbl_trace_method_name = name;
+	acpi_gbl_trace_flags = flags;
+	acpi_gbl_trace_dbg_level = debug_level;
+	acpi_gbl_trace_dbg_layer = debug_layer;
+	status = AE_OK;
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_execute_method
+ *
+ * PARAMETERS:  info            - Method info block, contains:
+ *                  node            - Method Node to execute
+ *                  obj_desc        - Method object
+ *                  parameters      - List of parameters to pass to the method,
+ *                                    terminated by NULL. Params itself may be
+ *                                    NULL if no parameters are being passed.
+ *                  return_object   - Where to put method's return value (if
+ *                                    any). If NULL, no value is returned.
+ *                  parameter_type  - Type of Parameter list
+ *                  return_object   - Where to put method's return value (if
+ *                                    any). If NULL, no value is returned.
+ *                  pass_number     - Parse or execute pass
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute a control method
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
+{
+	acpi_status status;
+	union acpi_parse_object *op;
+	struct acpi_walk_state *walk_state;
+
+	ACPI_FUNCTION_TRACE(ps_execute_method);
+
+	/* Quick validation of DSDT header */
+
+	acpi_tb_check_dsdt_header();
+
+	/* Validate the Info and method Node */
+
+	if (!info || !info->node) {
+		return_ACPI_STATUS(AE_NULL_ENTRY);
+	}
+
+	/* Init for new method, wait on concurrency semaphore */
+
+	status =
+	    acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * The caller "owns" the parameters, so give each one an extra reference
+	 */
+	acpi_ps_update_parameter_list(info, REF_INCREMENT);
+
+	/*
+	 * Execute the method. Performs parse simultaneously
+	 */
+	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+			  "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
+			  info->node->name.ascii, info->node, info->obj_desc));
+
+	/* Create and init a Root Node */
+
+	op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start);
+	if (!op) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/* Create and initialize a new walk state */
+
+	info->pass_number = ACPI_IMODE_EXECUTE;
+	walk_state =
+	    acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
+				      NULL, NULL);
+	if (!walk_state) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	status = acpi_ds_init_aml_walk(walk_state, op, info->node,
+				       info->obj_desc->method.aml_start,
+				       info->obj_desc->method.aml_length, info,
+				       info->pass_number);
+	if (ACPI_FAILURE(status)) {
+		acpi_ds_delete_walk_state(walk_state);
+		goto cleanup;
+	}
+
+	if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
+		walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
+	}
+
+	/* Invoke an internal method if necessary */
+
+	if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
+		status =
+		    info->obj_desc->method.dispatch.implementation(walk_state);
+		info->return_object = walk_state->return_desc;
+
+		/* Cleanup states */
+
+		acpi_ds_scope_stack_clear(walk_state);
+		acpi_ps_cleanup_scope(&walk_state->parser_state);
+		acpi_ds_terminate_control_method(walk_state->method_desc,
+						 walk_state);
+		acpi_ds_delete_walk_state(walk_state);
+		goto cleanup;
+	}
+
+	/*
+	 * Start method evaluation with an implicit return of zero.
+	 * This is done for Windows compatibility.
+	 */
+	if (acpi_gbl_enable_interpreter_slack) {
+		walk_state->implicit_return_obj =
+		    acpi_ut_create_integer_object((u64) 0);
+		if (!walk_state->implicit_return_obj) {
+			status = AE_NO_MEMORY;
+			acpi_ds_delete_walk_state(walk_state);
+			goto cleanup;
+		}
+	}
+
+	/* Parse the AML */
+
+	status = acpi_ps_parse_aml(walk_state);
+
+	/* walk_state was deleted by parse_aml */
+
+cleanup:
+	acpi_ps_delete_parse_tree(op);
+
+	/* Take away the extra reference that we gave the parameters above */
+
+	acpi_ps_update_parameter_list(info, REF_DECREMENT);
+
+	/* Exit now if error above */
+
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * If the method has returned an object, signal this to the caller with
+	 * a control exception code
+	 */
+	if (info->return_object) {
+		ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
+				  info->return_object));
+		ACPI_DUMP_STACK_ENTRY(info->return_object);
+
+		status = AE_CTRL_RETURN_VALUE;
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_execute_table
+ *
+ * PARAMETERS:  info            - Method info block, contains:
+ *              node            - Node to where the is entered into the
+ *                                namespace
+ *              obj_desc        - Pseudo method object describing the AML
+ *                                code of the entire table
+ *              pass_number     - Parse or execute pass
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute a table
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ps_execute_table(struct acpi_evaluate_info *info)
+{
+	acpi_status status;
+	union acpi_parse_object *op = NULL;
+	struct acpi_walk_state *walk_state = NULL;
+
+	ACPI_FUNCTION_TRACE(ps_execute_table);
+
+	/* Create and init a Root Node */
+
+	op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start);
+	if (!op) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/* Create and initialize a new walk state */
+
+	walk_state =
+	    acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
+				      NULL, NULL);
+	if (!walk_state) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	status = acpi_ds_init_aml_walk(walk_state, op, info->node,
+				       info->obj_desc->method.aml_start,
+				       info->obj_desc->method.aml_length, info,
+				       info->pass_number);
+	if (ACPI_FAILURE(status)) {
+		goto cleanup;
+	}
+
+	if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
+		walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
+	}
+
+	/* Info->Node is the default location to load the table  */
+
+	if (info->node && info->node != acpi_gbl_root_node) {
+		status =
+		    acpi_ds_scope_stack_push(info->node, ACPI_TYPE_METHOD,
+					     walk_state);
+		if (ACPI_FAILURE(status)) {
+			goto cleanup;
+		}
+	}
+
+	/*
+	 * Parse the AML, walk_state will be deleted by parse_aml
+	 */
+	acpi_ex_enter_interpreter();
+	status = acpi_ps_parse_aml(walk_state);
+	acpi_ex_exit_interpreter();
+	walk_state = NULL;
+
+cleanup:
+	if (walk_state) {
+		acpi_ds_delete_walk_state(walk_state);
+	}
+	if (op) {
+		acpi_ps_delete_parse_tree(op);
+	}
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_update_parameter_list
+ *
+ * PARAMETERS:  info            - See struct acpi_evaluate_info
+ *                                (Used: parameter_type and Parameters)
+ *              action          - Add or Remove reference
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Update reference count on all method parameter objects
+ *
+ ******************************************************************************/
+
+static void
+acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
+{
+	u32 i;
+
+	if (info->parameters) {
+
+		/* Update reference count for each parameter */
+
+		for (i = 0; info->parameters[i]; i++) {
+
+			/* Ignore errors, just do them all */
+
+			(void)acpi_ut_update_object_reference(info->
+							      parameters[i],
+							      action);
+		}
+	}
+}