![Bob Moore](/assets/img/avatar_default.png)
Implemented support in the Resource Manager to allow unresolved namestring references within resource package objects for the _PRT method. This support is in addition to the previously implemented unresolved reference support within the AML parser. If the interpreter slack mode is enabled (true on Linux unless acpi=strict), these unresolved references will be passed through to the caller as a NULL package entry. http://bugzilla.kernel.org/show_bug.cgi?id=5741 Implemented and deployed new macros and functions for error and warning messages across the subsystem. These macros are simpler and generate less code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION, ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. Implemented the acpi_cpu_flags type to simplify host OS integration of the Acquire/Release Lock OSL interfaces. Suggested by Steven Rostedt and Andrew Morton. Fixed a problem where Alias ASL operators are sometimes not correctly resolved. causing AE_AML_INTERNAL http://bugzilla.kernel.org/show_bug.cgi?id=5189 http://bugzilla.kernel.org/show_bug.cgi?id=5674 Fixed several problems with the implementation of the ConcatenateResTemplate ASL operator. As per the ACPI specification, zero length buffers are now treated as a single EndTag. One-length buffers always cause a fatal exception. Non-zero length buffers that do not end with a full 2-byte EndTag cause a fatal exception. Fixed a possible structure overwrite in the AcpiGetObjectInfo external interface. (With assistance from Thomas Renninger) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
446 lines
12 KiB
C
446 lines
12 KiB
C
/******************************************************************************
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*
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* Module Name: nsinit - namespace initialization
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acdispat.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsinit")
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/* Local prototypes */
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static acpi_status
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acpi_ns_init_one_object(acpi_handle obj_handle,
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u32 level, void *context, void **return_value);
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static acpi_status
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acpi_ns_init_one_device(acpi_handle obj_handle,
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u32 nesting_level, void *context, void **return_value);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_initialize_objects
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the entire namespace and perform any necessary
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* initialization on the objects found therein
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*
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******************************************************************************/
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acpi_status acpi_ns_initialize_objects(void)
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{
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acpi_status status;
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struct acpi_init_walk_info info;
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ACPI_FUNCTION_TRACE("ns_initialize_objects");
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"**** Starting initialization of namespace objects ****\n"));
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"Completing Region/Field/Buffer/Package initialization:"));
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/* Set all init info to zero */
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ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
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/* Walk entire namespace from the supplied root */
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status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, acpi_ns_init_one_object,
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&info, NULL);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace"));
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n",
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info.op_region_init, info.op_region_count,
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info.field_init, info.field_count,
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info.buffer_init, info.buffer_count,
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info.package_init, info.package_count,
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info.object_count));
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"%hd Control Methods found\n", info.method_count));
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"%hd Op Regions found\n", info.op_region_count));
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_initialize_devices
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*
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* PARAMETERS: None
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*
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* RETURN: acpi_status
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*
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* DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
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* This means running _INI on all present devices.
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*
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* Note: We install PCI config space handler on region access,
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* not here.
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*
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******************************************************************************/
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acpi_status acpi_ns_initialize_devices(void)
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{
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acpi_status status;
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struct acpi_device_walk_info info;
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ACPI_FUNCTION_TRACE("ns_initialize_devices");
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/* Init counters */
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info.device_count = 0;
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info.num_STA = 0;
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info.num_INI = 0;
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"Executing all Device _STA and_INI methods:"));
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Walk namespace for all objects */
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, TRUE,
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acpi_ns_init_one_device, &info, NULL);
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace"));
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"\n%hd Devices found - executed %hd _STA, %hd _INI methods\n",
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info.device_count, info.num_STA, info.num_INI));
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_init_one_object
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*
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* PARAMETERS: obj_handle - Node
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* Level - Current nesting level
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* Context - Points to a init info struct
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* return_value - Not used
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*
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* RETURN: Status
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*
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* DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
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* within the namespace.
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*
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* Currently, the only objects that require initialization are:
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* 1) Methods
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* 2) Op Regions
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_init_one_object(acpi_handle obj_handle,
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u32 level, void *context, void **return_value)
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{
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acpi_object_type type;
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acpi_status status;
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struct acpi_init_walk_info *info =
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(struct acpi_init_walk_info *)context;
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struct acpi_namespace_node *node =
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(struct acpi_namespace_node *)obj_handle;
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union acpi_operand_object *obj_desc;
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ACPI_FUNCTION_NAME("ns_init_one_object");
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info->object_count++;
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/* And even then, we are only interested in a few object types */
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type = acpi_ns_get_type(obj_handle);
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obj_desc = acpi_ns_get_attached_object(node);
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if (!obj_desc) {
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return (AE_OK);
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}
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/* Increment counters for object types we are looking for */
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switch (type) {
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case ACPI_TYPE_REGION:
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info->op_region_count++;
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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info->field_count++;
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break;
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case ACPI_TYPE_BUFFER:
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info->buffer_count++;
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break;
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case ACPI_TYPE_PACKAGE:
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info->package_count++;
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break;
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default:
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/* No init required, just exit now */
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return (AE_OK);
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}
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/*
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* If the object is already initialized, nothing else to do
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*/
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if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
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return (AE_OK);
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}
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/*
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* Must lock the interpreter before executing AML code
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*/
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status = acpi_ex_enter_interpreter();
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/*
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* Each of these types can contain executable AML code within the
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* declaration.
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*/
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switch (type) {
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case ACPI_TYPE_REGION:
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info->op_region_init++;
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status = acpi_ds_get_region_arguments(obj_desc);
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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info->field_init++;
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status = acpi_ds_get_buffer_field_arguments(obj_desc);
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break;
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case ACPI_TYPE_BUFFER:
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info->buffer_init++;
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status = acpi_ds_get_buffer_arguments(obj_desc);
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break;
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case ACPI_TYPE_PACKAGE:
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info->package_init++;
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status = acpi_ds_get_package_arguments(obj_desc);
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break;
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default:
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/* No other types can get here */
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break;
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}
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Could not execute arguments for [%4.4s] (%s)",
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acpi_ut_get_node_name(node),
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acpi_ut_get_type_name(type)));
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}
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/*
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* Print a dot for each object unless we are going to print the entire
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* pathname
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*/
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if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
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}
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/*
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* We ignore errors from above, and always return OK, since we don't want
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* to abort the walk on any single error.
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*/
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acpi_ex_exit_interpreter();
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_init_one_device
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*
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* PARAMETERS: acpi_walk_callback
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*
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* RETURN: acpi_status
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*
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* DESCRIPTION: This is called once per device soon after ACPI is enabled
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* to initialize each device. It determines if the device is
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* present, and if so, calls _INI.
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_init_one_device(acpi_handle obj_handle,
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u32 nesting_level, void *context, void **return_value)
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{
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struct acpi_device_walk_info *info =
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(struct acpi_device_walk_info *)context;
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struct acpi_parameter_info pinfo;
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u32 flags;
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acpi_status status;
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struct acpi_namespace_node *ini_node;
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struct acpi_namespace_node *device_node;
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ACPI_FUNCTION_TRACE("ns_init_one_device");
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device_node = acpi_ns_map_handle_to_node(obj_handle);
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if (!device_node) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/*
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* We will run _STA/_INI on Devices, Processors and thermal_zones only
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*/
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if ((device_node->type != ACPI_TYPE_DEVICE) &&
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(device_node->type != ACPI_TYPE_PROCESSOR) &&
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(device_node->type != ACPI_TYPE_THERMAL)) {
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return_ACPI_STATUS(AE_OK);
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}
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if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) &&
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(!(acpi_dbg_level & ACPI_LV_INFO))) {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
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}
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info->device_count++;
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/*
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* Check if the _INI method exists for this device -
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* if _INI does not exist, there is no need to run _STA
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* No _INI means device requires no initialization
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*/
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status = acpi_ns_search_node(*ACPI_CAST_PTR(u32, METHOD_NAME__INI),
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device_node, ACPI_TYPE_METHOD, &ini_node);
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if (ACPI_FAILURE(status)) {
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/* No _INI method found - move on to next device */
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return_ACPI_STATUS(AE_OK);
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}
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/*
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* Run _STA to determine if we can run _INI on the device -
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* the device must be present before _INI can be run.
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* However, _STA is not required - assume device present if no _STA
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*/
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ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD,
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device_node,
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METHOD_NAME__STA));
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pinfo.node = device_node;
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pinfo.parameters = NULL;
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pinfo.parameter_type = ACPI_PARAM_ARGS;
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status = acpi_ut_execute_STA(pinfo.node, &flags);
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if (ACPI_FAILURE(status)) {
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/* Ignore error and move on to next device */
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return_ACPI_STATUS(AE_OK);
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}
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if (flags != ACPI_UINT32_MAX) {
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info->num_STA++;
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}
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if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
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/* Don't look at children of a not present device */
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return_ACPI_STATUS(AE_CTRL_DEPTH);
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}
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/*
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* The device is present and _INI exists. Run the _INI method.
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* (We already have the _INI node from above)
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*/
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ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD,
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pinfo.node,
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METHOD_NAME__INI));
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pinfo.node = ini_node;
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status = acpi_ns_evaluate_by_handle(&pinfo);
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if (ACPI_FAILURE(status)) {
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/* Ignore error and move on to next device */
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#ifdef ACPI_DEBUG_OUTPUT
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char *scope_name = acpi_ns_get_external_pathname(ini_node);
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ACPI_WARNING((AE_INFO, "%s._INI failed: %s",
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scope_name, acpi_format_exception(status)));
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ACPI_MEM_FREE(scope_name);
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#endif
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} else {
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/* Delete any return object (especially if implicit_return is enabled) */
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if (pinfo.return_object) {
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acpi_ut_remove_reference(pinfo.return_object);
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}
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/* Count of successful INIs */
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info->num_INI++;
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}
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if (acpi_gbl_init_handler) {
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/* External initialization handler is present, call it */
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status =
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acpi_gbl_init_handler(pinfo.node, ACPI_INIT_DEVICE_INI);
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}
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return_ACPI_STATUS(AE_OK);
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}
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