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linux-next/drivers/acpi/acpica/dswload2.c
Erik Schmauss bdcf4cdbdc ACPICA: Disassembler: add external op to namespace on first pass 
ACPICA commit 117be4819588df3b7146f6f01723639b1d61e775

By doing so, external control method resolutions can be resolved like
normal control methods. This eliminates the need to reparse the aml
all over again for external control methods that were encoded within
the aml with the 0x15 bytecode.

Link: https://github.com/acpica/acpica/commit/117be481
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-06-27 22:25:25 +02:00

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/******************************************************************************
*
* Module Name: dswload2 - Dispatcher second pass namespace load callbacks
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acevents.h"
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME("dswload2")
/*******************************************************************************
*
* FUNCTION: acpi_ds_load2_begin_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
* out_op - Wher 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_load2_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 *buffer_ptr;
u32 flags;
ACPI_FUNCTION_TRACE(ds_load2_begin_op);
op = walk_state->op;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
walk_state));
if (op) {
if ((walk_state->control_state) &&
(walk_state->control_state->common.state ==
ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
/* We are executing a while loop outside of a method */
status = acpi_ds_exec_begin_op(walk_state, out_op);
return_ACPI_STATUS(status);
}
/* We only care about Namespace opcodes here */
if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
(walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
(!(walk_state->op_info->flags & AML_NAMED))) {
return_ACPI_STATUS(AE_OK);
}
/* Get the name we are going to enter or lookup in the namespace */
if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
/* For Namepath op, get the path string */
buffer_ptr = op->common.value.string;
if (!buffer_ptr) {
/* No name, just exit */
return_ACPI_STATUS(AE_OK);
}
} else {
/* Get name from the op */
buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
}
} else {
/* Get the namestring from the raw AML */
buffer_ptr =
acpi_ps_get_next_namestring(&walk_state->parser_state);
}
/* Map the opcode into an internal object type */
object_type = walk_state->op_info->object_type;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"State=%p Op=%p Type=%X\n", walk_state, op,
object_type));
switch (walk_state->opcode) {
case AML_FIELD_OP:
case AML_BANK_FIELD_OP:
case AML_INDEX_FIELD_OP:
node = NULL;
status = AE_OK;
break;
case AML_INT_NAMEPATH_OP:
/*
* The name_path is an object reference to an existing object.
* Don't enter the name into the namespace, but look it up
* for use later.
*/
status =
acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
object_type, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT, walk_state, &(node));
break;
case AML_SCOPE_OP:
/* Special case for Scope(\) -> refers to the Root node */
if (op && (op->named.node == acpi_gbl_root_node)) {
node = op->named.node;
status =
acpi_ds_scope_stack_push(node, object_type,
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
/*
* The Path is an object reference to an existing object.
* Don't enter the name into the namespace, but look it up
* for use later.
*/
status =
acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
object_type, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT, walk_state,
&(node));
if (ACPI_FAILURE(status)) {
#ifdef ACPI_ASL_COMPILER
if (status == AE_NOT_FOUND) {
status = AE_OK;
} else {
ACPI_ERROR_NAMESPACE(buffer_ptr,
status);
}
#else
ACPI_ERROR_NAMESPACE(buffer_ptr, status);
#endif
return_ACPI_STATUS(status);
}
}
/*
* We must 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) { ... }
*/
ACPI_WARNING((AE_INFO,
"Type override - [%4.4s] had invalid type (%s) "
"for Scope operator, changed to type ANY",
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;
}
/*lint -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:
/* All other opcodes */
if (op && op->common.node) {
/* This op/node was previously entered into the namespace */
node = op->common.node;
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);
}
}
return_ACPI_STATUS(AE_OK);
}
/*
* 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.
*
* Note: Name may already exist if we are executing a deferred opcode.
*/
if (walk_state->deferred_node) {
/* This name is already in the namespace, get the node */
node = walk_state->deferred_node;
status = AE_OK;
break;
}
flags = ACPI_NS_NO_UPSEARCH;
if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
/* Execution mode, node cannot already exist, node is temporary */
flags |= ACPI_NS_ERROR_IF_FOUND;
if (!
(walk_state->
parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
flags |= ACPI_NS_TEMPORARY;
}
}
#ifdef ACPI_ASL_COMPILER
/*
* Do not open a scope for AML_EXTERNAL_OP
* acpi_ns_lookup can open a new scope based on the object type
* of this op. AML_EXTERNAL_OP is a declaration rather than a
* definition. In the case that this external is a method object,
* acpi_ns_lookup will open a new scope. However, an AML_EXTERNAL_OP
* associated with the ACPI_TYPE_METHOD is a declaration, rather than
* a definition. Flags is set to avoid opening a scope for any
* AML_EXTERNAL_OP.
*/
if (walk_state->opcode == AML_EXTERNAL_OP) {
flags |= ACPI_NS_DONT_OPEN_SCOPE;
}
#endif
/* Add new entry or lookup existing entry */
status =
acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
object_type, ACPI_IMODE_LOAD_PASS2, flags,
walk_state, &node);
if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"***New Node [%4.4s] %p is temporary\n",
acpi_ut_get_node_name(node), node));
}
break;
}
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE(buffer_ptr, status);
return_ACPI_STATUS(status);
}
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 new op */
if (node) {
op->named.name = node->name.integer;
}
*out_op = op;
}
/*
* 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;
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_load2_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_load2_end_op(struct acpi_walk_state *walk_state)
{
union acpi_parse_object *op;
acpi_status status = AE_OK;
acpi_object_type object_type;
struct acpi_namespace_node *node;
union acpi_parse_object *arg;
struct acpi_namespace_node *new_node;
#ifndef ACPI_NO_METHOD_EXECUTION
u32 i;
u8 region_space;
#endif
ACPI_FUNCTION_TRACE(ds_load2_end_op);
op = walk_state->op;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
walk_state->op_info->name, op, walk_state));
/* Check if opcode had an associated namespace object */
if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
return_ACPI_STATUS(AE_OK);
}
if (op->common.aml_opcode == AML_SCOPE_OP) {
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Ending scope Op=%p State=%p\n", op,
walk_state));
}
object_type = walk_state->op_info->object_type;
/*
* Get the Node/name from the earlier lookup
* (It was saved in the *op structure)
*/
node = op->common.node;
/*
* Put the Node on the object stack (Contains the ACPI Name of
* this object)
*/
walk_state->operands[0] = (void *)node;
walk_state->num_operands = 1;
/* Pop the scope stack */
if (acpi_ns_opens_scope(object_type) &&
(op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
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);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
}
/*
* Named operations are as follows:
*
* AML_ALIAS
* AML_BANKFIELD
* AML_CREATEBITFIELD
* AML_CREATEBYTEFIELD
* AML_CREATEDWORDFIELD
* AML_CREATEFIELD
* AML_CREATEQWORDFIELD
* AML_CREATEWORDFIELD
* AML_DATA_REGION
* AML_DEVICE
* AML_EVENT
* AML_FIELD
* AML_INDEXFIELD
* AML_METHOD
* AML_METHODCALL
* AML_MUTEX
* AML_NAME
* AML_NAMEDFIELD
* AML_OPREGION
* AML_POWERRES
* AML_PROCESSOR
* AML_SCOPE
* AML_THERMALZONE
*/
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
acpi_ps_get_opcode_name(op->common.aml_opcode),
walk_state, op, node));
/* Decode the opcode */
arg = op->common.value.arg;
switch (walk_state->op_info->type) {
#ifndef ACPI_NO_METHOD_EXECUTION
case AML_TYPE_CREATE_FIELD:
/*
* Create the field object, but the field buffer and index must
* be evaluated later during the execution phase
*/
status = acpi_ds_create_buffer_field(op, walk_state);
break;
case AML_TYPE_NAMED_FIELD:
/*
* If we are executing a method, initialize the field
*/
if (walk_state->method_node) {
status = acpi_ds_init_field_objects(op, walk_state);
}
switch (op->common.aml_opcode) {
case AML_INDEX_FIELD_OP:
status =
acpi_ds_create_index_field(op,
(acpi_handle)arg->common.
node, walk_state);
break;
case AML_BANK_FIELD_OP:
status =
acpi_ds_create_bank_field(op, arg->common.node,
walk_state);
break;
case AML_FIELD_OP:
status =
acpi_ds_create_field(op, arg->common.node,
walk_state);
break;
default:
/* All NAMED_FIELD opcodes must be handled above */
break;
}
break;
case AML_TYPE_NAMED_SIMPLE:
status = acpi_ds_create_operands(walk_state, arg);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
switch (op->common.aml_opcode) {
case AML_PROCESSOR_OP:
status = acpi_ex_create_processor(walk_state);
break;
case AML_POWER_RESOURCE_OP:
status = acpi_ex_create_power_resource(walk_state);
break;
case AML_MUTEX_OP:
status = acpi_ex_create_mutex(walk_state);
break;
case AML_EVENT_OP:
status = acpi_ex_create_event(walk_state);
break;
case AML_ALIAS_OP:
status = acpi_ex_create_alias(walk_state);
break;
default:
/* Unknown opcode */
status = AE_OK;
goto cleanup;
}
/* Delete operands */
for (i = 1; i < walk_state->num_operands; i++) {
acpi_ut_remove_reference(walk_state->operands[i]);
walk_state->operands[i] = NULL;
}
break;
#endif /* ACPI_NO_METHOD_EXECUTION */
case AML_TYPE_NAMED_COMPLEX:
switch (op->common.aml_opcode) {
#ifndef ACPI_NO_METHOD_EXECUTION
case AML_REGION_OP:
case AML_DATA_REGION_OP:
if (op->common.aml_opcode == AML_REGION_OP) {
region_space = (acpi_adr_space_type)
((op->common.value.arg)->common.value.
integer);
} else {
region_space = ACPI_ADR_SPACE_DATA_TABLE;
}
/*
* The op_region is not fully parsed at this time. The only valid
* argument is the space_id. (We must save the address of the
* AML of the address and length operands)
*
* If we have a valid region, initialize it. The namespace is
* unlocked at this point.
*
* Need to unlock interpreter if it is locked (if we are running
* a control method), in order to allow _REG methods to be run
* during acpi_ev_initialize_region.
*/
if (walk_state->method_node) {
/*
* Executing a method: initialize the region and unlock
* the interpreter
*/
status = acpi_ex_create_region(op->named.data,
op->named.length,
region_space,
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
status =
acpi_ev_initialize_region
(acpi_ns_get_attached_object(node));
break;
case AML_NAME_OP:
status = acpi_ds_create_node(walk_state, node, op);
break;
case 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);
}
}
break;
#endif /* ACPI_NO_METHOD_EXECUTION */
default:
/* All NAMED_COMPLEX opcodes must be handled above */
break;
}
break;
case AML_CLASS_INTERNAL:
/* case AML_INT_NAMEPATH_OP: */
break;
case AML_CLASS_METHOD_CALL:
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
walk_state, op, node));
/*
* Lookup the method name and save the Node
*/
status =
acpi_ns_lookup(walk_state->scope_info,
arg->common.value.string, ACPI_TYPE_ANY,
ACPI_IMODE_LOAD_PASS2,
ACPI_NS_SEARCH_PARENT |
ACPI_NS_DONT_OPEN_SCOPE, walk_state,
&(new_node));
if (ACPI_SUCCESS(status)) {
/*
* Make sure that what we found is indeed a method
* We didn't search for a method on purpose, to see if the name
* would resolve
*/
if (new_node->type != ACPI_TYPE_METHOD) {
status = AE_AML_OPERAND_TYPE;
}
/* We could put the returned object (Node) on the object stack for
* later, but for now, we will put it in the "op" object that the
* parser uses, so we can get it again at the end of this scope
*/
op->common.node = new_node;
} else {
ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
}
break;
default:
break;
}
cleanup:
/* Remove the Node pushed at the very beginning */
walk_state->operands[0] = NULL;
walk_state->num_operands = 0;
return_ACPI_STATUS(status);
}
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