diff options
Diffstat (limited to 'kernel/drivers/acpi/acpica/dsinit.c')
| -rw-r--r-- | kernel/drivers/acpi/acpica/dsinit.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/kernel/drivers/acpi/acpica/dsinit.c b/kernel/drivers/acpi/acpica/dsinit.c new file mode 100644 index 000000000..bbe74bceb --- /dev/null +++ b/kernel/drivers/acpi/acpica/dsinit.c @@ -0,0 +1,253 @@ +/****************************************************************************** + * + * Module Name: dsinit - Object initialization namespace walk + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2015, 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 "acdispat.h" +#include "acnamesp.h" +#include "actables.h" + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsinit") + +/* Local prototypes */ +static acpi_status +acpi_ds_init_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value); + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_one_object + * + * PARAMETERS: obj_handle - Node for the object + * level - Current nesting level + * context - Points to a init info struct + * return_value - Not used + * + * RETURN: Status + * + * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object + * within the namespace. + * + * Currently, the only objects that require initialization are: + * 1) Methods + * 2) Operation Regions + * + ******************************************************************************/ + +static acpi_status +acpi_ds_init_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value) +{ + struct acpi_init_walk_info *info = + (struct acpi_init_walk_info *)context; + struct acpi_namespace_node *node = + (struct acpi_namespace_node *)obj_handle; + acpi_status status; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_ENTRY(); + + /* + * We are only interested in NS nodes owned by the table that + * was just loaded + */ + if (node->owner_id != info->owner_id) { + return (AE_OK); + } + + info->object_count++; + + /* And even then, we are only interested in a few object types */ + + switch (acpi_ns_get_type(obj_handle)) { + case ACPI_TYPE_REGION: + + status = acpi_ds_initialize_region(obj_handle); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "During Region initialization %p [%4.4s]", + obj_handle, + acpi_ut_get_node_name(obj_handle))); + } + + info->op_region_count++; + break; + + case ACPI_TYPE_METHOD: + /* + * Auto-serialization support. We will examine each method that is + * not_serialized to determine if it creates any Named objects. If + * it does, it will be marked serialized to prevent problems if + * the method is entered by two or more threads and an attempt is + * made to create the same named object twice -- which results in + * an AE_ALREADY_EXISTS exception and method abort. + */ + info->method_count++; + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + break; + } + + /* Ignore if already serialized */ + + if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) { + info->serial_method_count++; + break; + } + + if (acpi_gbl_auto_serialize_methods) { + + /* Parse/scan method and serialize it if necessary */ + + acpi_ds_auto_serialize_method(node, obj_desc); + if (obj_desc->method. + info_flags & ACPI_METHOD_SERIALIZED) { + + /* Method was just converted to Serialized */ + + info->serial_method_count++; + info->serialized_method_count++; + break; + } + } + + info->non_serial_method_count++; + break; + + case ACPI_TYPE_DEVICE: + + info->device_count++; + break; + + default: + + break; + } + + /* + * We ignore errors from above, and always return OK, since + * we don't want to abort the walk on a single error. + */ + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_initialize_objects + * + * PARAMETERS: table_desc - Descriptor for parent ACPI table + * start_node - Root of subtree to be initialized. + * + * RETURN: Status + * + * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any + * necessary initialization on the objects found therein + * + ******************************************************************************/ + +acpi_status +acpi_ds_initialize_objects(u32 table_index, + struct acpi_namespace_node * start_node) +{ + acpi_status status; + struct acpi_init_walk_info info; + struct acpi_table_header *table; + acpi_owner_id owner_id; + + ACPI_FUNCTION_TRACE(ds_initialize_objects); + + status = acpi_tb_get_owner_id(table_index, &owner_id); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "**** Starting initialization of namespace objects ****\n")); + + /* Set all init info to zero */ + + ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); + + info.owner_id = owner_id; + info.table_index = table_index; + + /* Walk entire namespace from the supplied root */ + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * We don't use acpi_walk_namespace since we do not want to acquire + * the namespace reader lock. + */ + status = + acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, + ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object, + NULL, &info, NULL); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); + } + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + status = acpi_get_table_by_index(table_index, &table); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "Table [%4.4s] (id %4.4X) - %4u Objects with %3u Devices, " + "%3u Regions, %3u Methods (%u/%u/%u Serial/Non/Cvt)\n", + table->signature, owner_id, info.object_count, + info.device_count, info.op_region_count, + info.method_count, info.serial_method_count, + info.non_serial_method_count, + info.serialized_method_count)); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n", + info.method_count, info.op_region_count)); + + return_ACPI_STATUS(AE_OK); +} |