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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/acpi/acpica/dswload.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/acpi/acpica/dswload.c')
-rw-r--r--drivers/acpi/acpica/dswload.c596
1 files changed, 596 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c
new file mode 100644
index 0000000000..f7b8496c8b
--- /dev/null
+++ b/drivers/acpi/acpica/dswload.c
@@ -0,0 +1,596 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: dswload - Dispatcher first pass namespace load callbacks
+ *
+ * Copyright (C) 2000 - 2023, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "amlcode.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+#ifdef ACPI_ASL_COMPILER
+#include "acdisasm.h"
+#endif
+
+#define _COMPONENT ACPI_DISPATCHER
+ACPI_MODULE_NAME("dswload")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_init_callbacks
+ *
+ * PARAMETERS: walk_state - Current state of the parse tree walk
+ * pass_number - 1, 2, or 3
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Init walk state callbacks
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
+{
+
+ switch (pass_number) {
+ case 0:
+
+ /* Parse only - caller will setup callbacks */
+
+ walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
+ ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE;
+ walk_state->descending_callback = NULL;
+ walk_state->ascending_callback = NULL;
+ break;
+
+ case 1:
+
+ /* Load pass 1 */
+
+ walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
+ ACPI_PARSE_DELETE_TREE;
+ walk_state->descending_callback = acpi_ds_load1_begin_op;
+ walk_state->ascending_callback = acpi_ds_load1_end_op;
+ break;
+
+ case 2:
+
+ /* Load pass 2 */
+
+ walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
+ ACPI_PARSE_DELETE_TREE;
+ walk_state->descending_callback = acpi_ds_load2_begin_op;
+ walk_state->ascending_callback = acpi_ds_load2_end_op;
+ break;
+
+ case 3:
+
+ /* Execution pass */
+
+ walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
+ ACPI_PARSE_DELETE_TREE;
+ walk_state->descending_callback = acpi_ds_exec_begin_op;
+ walk_state->ascending_callback = acpi_ds_exec_end_op;
+ break;
+
+ default:
+
+ return (AE_BAD_PARAMETER);
+ }
+
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_load1_begin_op
+ *
+ * PARAMETERS: walk_state - Current state of the parse tree walk
+ * out_op - Where to return op if a new one is created
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Descending callback used during the loading of ACPI tables.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
+ union acpi_parse_object **out_op)
+{
+ union acpi_parse_object *op;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+ acpi_object_type object_type;
+ char *path;
+ u32 flags;
+
+ ACPI_FUNCTION_TRACE_PTR(ds_load1_begin_op, walk_state->op);
+
+ op = walk_state->op;
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
+ walk_state));
+
+ /* We are only interested in opcodes that have an associated name */
+
+ if (op) {
+ if (!(walk_state->op_info->flags & AML_NAMED)) {
+ *out_op = op;
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Check if this object has already been installed in the namespace */
+
+ if (op->common.node) {
+ *out_op = op;
+ return_ACPI_STATUS(AE_OK);
+ }
+ }
+
+ path = acpi_ps_get_next_namestring(&walk_state->parser_state);
+
+ /* Map the raw opcode into an internal object type */
+
+ object_type = walk_state->op_info->object_type;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "State=%p Op=%p [%s]\n", walk_state, op,
+ acpi_ut_get_type_name(object_type)));
+
+ switch (walk_state->opcode) {
+ case AML_SCOPE_OP:
+ /*
+ * The target name of the Scope() operator must exist at this point so
+ * that we can actually open the scope to enter new names underneath it.
+ * Allow search-to-root for single namesegs.
+ */
+ status =
+ acpi_ns_lookup(walk_state->scope_info, path, object_type,
+ ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
+ walk_state, &(node));
+#ifdef ACPI_ASL_COMPILER
+ if (status == AE_NOT_FOUND) {
+ /*
+ * Table disassembly:
+ * Target of Scope() not found. Generate an External for it, and
+ * insert the name into the namespace.
+ */
+ acpi_dm_add_op_to_external_list(op, path,
+ ACPI_TYPE_DEVICE, 0, 0);
+ status =
+ acpi_ns_lookup(walk_state->scope_info, path,
+ object_type, ACPI_IMODE_LOAD_PASS1,
+ ACPI_NS_SEARCH_PARENT, walk_state,
+ &node);
+ }
+#endif
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR_NAMESPACE(walk_state->scope_info, path,
+ status);
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Check to make sure that the target is
+ * one of the opcodes that actually opens a scope
+ */
+ switch (node->type) {
+ case ACPI_TYPE_ANY:
+ case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
+ case ACPI_TYPE_DEVICE:
+ case ACPI_TYPE_POWER:
+ case ACPI_TYPE_PROCESSOR:
+ case ACPI_TYPE_THERMAL:
+
+ /* These are acceptable types */
+ break;
+
+ case ACPI_TYPE_INTEGER:
+ case ACPI_TYPE_STRING:
+ case ACPI_TYPE_BUFFER:
+ /*
+ * These types we will allow, but we will change the type.
+ * This enables some existing code of the form:
+ *
+ * Name (DEB, 0)
+ * Scope (DEB) { ... }
+ *
+ * Note: silently change the type here. On the second pass,
+ * we will report a warning
+ */
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Type override - [%4.4s] had invalid type (%s) "
+ "for Scope operator, changed to type ANY\n",
+ acpi_ut_get_node_name(node),
+ acpi_ut_get_type_name(node->type)));
+
+ node->type = ACPI_TYPE_ANY;
+ walk_state->scope_info->common.value = ACPI_TYPE_ANY;
+ break;
+
+ case ACPI_TYPE_METHOD:
+ /*
+ * Allow scope change to root during execution of module-level
+ * code. Root is typed METHOD during this time.
+ */
+ if ((node == acpi_gbl_root_node) &&
+ (walk_state->
+ parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
+ break;
+ }
+
+ ACPI_FALLTHROUGH;
+
+ default:
+
+ /* All other types are an error */
+
+ ACPI_ERROR((AE_INFO,
+ "Invalid type (%s) for target of "
+ "Scope operator [%4.4s] (Cannot override)",
+ acpi_ut_get_type_name(node->type),
+ acpi_ut_get_node_name(node)));
+
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+ break;
+
+ default:
+ /*
+ * For all other named opcodes, we will enter the name into
+ * the namespace.
+ *
+ * Setup the search flags.
+ * Since we are entering a name into the namespace, we do not want to
+ * enable the search-to-root upsearch.
+ *
+ * There are only two conditions where it is acceptable that the name
+ * already exists:
+ * 1) the Scope() operator can reopen a scoping object that was
+ * previously defined (Scope, Method, Device, etc.)
+ * 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
+ * buffer_field, or Package), the name of the object is already
+ * in the namespace.
+ */
+ if (walk_state->deferred_node) {
+
+ /* This name is already in the namespace, get the node */
+
+ node = walk_state->deferred_node;
+ status = AE_OK;
+ break;
+ }
+
+ /*
+ * If we are executing a method, do not create any namespace objects
+ * during the load phase, only during execution.
+ */
+ if (walk_state->method_node) {
+ node = NULL;
+ status = AE_OK;
+ break;
+ }
+
+ flags = ACPI_NS_NO_UPSEARCH;
+ if ((walk_state->opcode != AML_SCOPE_OP) &&
+ (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
+ if (walk_state->namespace_override) {
+ flags |= ACPI_NS_OVERRIDE_IF_FOUND;
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "[%s] Override allowed\n",
+ acpi_ut_get_type_name
+ (object_type)));
+ } else {
+ flags |= ACPI_NS_ERROR_IF_FOUND;
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "[%s] Cannot already exist\n",
+ acpi_ut_get_type_name
+ (object_type)));
+ }
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "[%s] Both Find or Create allowed\n",
+ acpi_ut_get_type_name(object_type)));
+ }
+
+ /*
+ * Enter the named type into the internal namespace. We enter the name
+ * as we go downward in the parse tree. Any necessary subobjects that
+ * involve arguments to the opcode must be created as we go back up the
+ * parse tree later.
+ */
+ status =
+ acpi_ns_lookup(walk_state->scope_info, path, object_type,
+ ACPI_IMODE_LOAD_PASS1, flags, walk_state,
+ &node);
+ if (ACPI_FAILURE(status)) {
+ if (status == AE_ALREADY_EXISTS) {
+
+ /* The name already exists in this scope */
+
+ if (node->flags & ANOBJ_IS_EXTERNAL) {
+ /*
+ * Allow one create on an object or segment that was
+ * previously declared External
+ */
+ node->flags &= ~ANOBJ_IS_EXTERNAL;
+ node->type = (u8) object_type;
+
+ /* Just retyped a node, probably will need to open a scope */
+
+ if (acpi_ns_opens_scope(object_type)) {
+ status =
+ acpi_ds_scope_stack_push
+ (node, object_type,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS
+ (status);
+ }
+ }
+
+ status = AE_OK;
+ }
+ }
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR_NAMESPACE(walk_state->scope_info,
+ path, status);
+ return_ACPI_STATUS(status);
+ }
+ }
+ break;
+ }
+
+ /* Common exit */
+
+ if (!op) {
+
+ /* Create a new op */
+
+ op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
+ if (!op) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+ }
+
+ /* Initialize the op */
+
+#ifdef ACPI_CONSTANT_EVAL_ONLY
+ op->named.path = path;
+#endif
+
+ if (node) {
+ /*
+ * Put the Node in the "op" object that the parser uses, so we
+ * can get it again quickly when this scope is closed
+ */
+ op->common.node = node;
+ op->named.name = node->name.integer;
+ }
+
+ acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
+ op);
+ *out_op = op;
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_load1_end_op
+ *
+ * PARAMETERS: walk_state - Current state of the parse tree walk
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Ascending callback used during the loading of the namespace,
+ * both control methods and everything else.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
+{
+ union acpi_parse_object *op;
+ acpi_object_type object_type;
+ acpi_status status = AE_OK;
+#ifdef ACPI_ASL_COMPILER
+ u8 param_count;
+#endif
+
+ ACPI_FUNCTION_TRACE(ds_load1_end_op);
+
+ op = walk_state->op;
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
+ walk_state));
+
+ /*
+ * Disassembler: handle create field operators here.
+ *
+ * create_buffer_field is a deferred op that is typically processed in load
+ * pass 2. However, disassembly of control method contents walk the parse
+ * tree with ACPI_PARSE_LOAD_PASS1 and AML_CREATE operators are processed
+ * in a later walk. This is a problem when there is a control method that
+ * has the same name as the AML_CREATE object. In this case, any use of the
+ * name segment will be detected as a method call rather than a reference
+ * to a buffer field.
+ *
+ * This earlier creation during disassembly solves this issue by inserting
+ * the named object in the ACPI namespace so that references to this name
+ * would be a name string rather than a method call.
+ */
+ if ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) &&
+ (walk_state->op_info->flags & AML_CREATE)) {
+ status = acpi_ds_create_buffer_field(op, walk_state);
+ return_ACPI_STATUS(status);
+ }
+
+ /* We are only interested in opcodes that have an associated name */
+
+ if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Get the object type to determine if we should pop the scope */
+
+ object_type = walk_state->op_info->object_type;
+
+ if (walk_state->op_info->flags & AML_FIELD) {
+ /*
+ * If we are executing a method, do not create any namespace objects
+ * during the load phase, only during execution.
+ */
+ if (!walk_state->method_node) {
+ if (walk_state->opcode == AML_FIELD_OP ||
+ walk_state->opcode == AML_BANK_FIELD_OP ||
+ walk_state->opcode == AML_INDEX_FIELD_OP) {
+ status =
+ acpi_ds_init_field_objects(op, walk_state);
+ }
+ }
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * If we are executing a method, do not create any namespace objects
+ * during the load phase, only during execution.
+ */
+ if (!walk_state->method_node) {
+ if (op->common.aml_opcode == AML_REGION_OP) {
+ status =
+ acpi_ex_create_region(op->named.data,
+ op->named.length,
+ (acpi_adr_space_type)
+ ((op->common.value.arg)->
+ common.value.integer),
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
+ status =
+ acpi_ex_create_region(op->named.data,
+ op->named.length,
+ ACPI_ADR_SPACE_DATA_TABLE,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ }
+ }
+
+ if (op->common.aml_opcode == AML_NAME_OP) {
+
+ /* For Name opcode, get the object type from the argument */
+
+ if (op->common.value.arg) {
+ object_type = (acpi_ps_get_opcode_info((op->common.
+ value.arg)->
+ common.
+ aml_opcode))->
+ object_type;
+
+ /* Set node type if we have a namespace node */
+
+ if (op->common.node) {
+ op->common.node->type = (u8) object_type;
+ }
+ }
+ }
+#ifdef ACPI_ASL_COMPILER
+ /*
+ * For external opcode, get the object type from the argument and
+ * get the parameter count from the argument's next.
+ */
+ if (acpi_gbl_disasm_flag &&
+ op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) {
+ /*
+ * Note, if this external is not a method
+ * Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
+ * Therefore, param_count will be 0.
+ */
+ param_count =
+ (u8)op->common.value.arg->common.next->common.value.integer;
+ object_type = (u8)op->common.value.arg->common.value.integer;
+ op->common.node->flags |= ANOBJ_IS_EXTERNAL;
+ op->common.node->type = (u8)object_type;
+
+ acpi_dm_create_subobject_for_external((u8)object_type,
+ &op->common.node,
+ param_count);
+
+ /*
+ * Add the external to the external list because we may be
+ * emitting code based off of the items within the external list.
+ */
+ acpi_dm_add_op_to_external_list(op, op->named.path,
+ (u8)object_type, param_count,
+ ACPI_EXT_ORIGIN_FROM_OPCODE |
+ ACPI_EXT_RESOLVED_REFERENCE);
+ }
+#endif
+
+ /*
+ * If we are executing a method, do not create any namespace objects
+ * during the load phase, only during execution.
+ */
+ if (!walk_state->method_node) {
+ if (op->common.aml_opcode == AML_METHOD_OP) {
+ /*
+ * method_op pkg_length name_string method_flags term_list
+ *
+ * Note: We must create the method node/object pair as soon as we
+ * see the method declaration. This allows later pass1 parsing
+ * of invocations of the method (need to know the number of
+ * arguments.)
+ */
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
+ walk_state, op, op->named.node));
+
+ if (!acpi_ns_get_attached_object(op->named.node)) {
+ walk_state->operands[0] =
+ ACPI_CAST_PTR(void, op->named.node);
+ walk_state->num_operands = 1;
+
+ status =
+ acpi_ds_create_operands(walk_state,
+ op->common.value.
+ arg);
+ if (ACPI_SUCCESS(status)) {
+ status =
+ acpi_ex_create_method(op->named.
+ data,
+ op->named.
+ length,
+ walk_state);
+ }
+
+ walk_state->operands[0] = NULL;
+ walk_state->num_operands = 0;
+
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ }
+ }
+ }
+
+ /* Pop the scope stack (only if loading a table) */
+
+ if (!walk_state->method_node &&
+ op->common.aml_opcode != AML_EXTERNAL_OP &&
+ acpi_ns_opens_scope(object_type)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "(%s): Popping scope for Op %p\n",
+ acpi_ut_get_type_name(object_type), op));
+
+ status = acpi_ds_scope_stack_pop(walk_state);
+ }
+
+ return_ACPI_STATUS(status);
+}