diff options
Diffstat (limited to 'drivers/acpi/namespace/nsinit.c')
| -rw-r--r-- | drivers/acpi/namespace/nsinit.c | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/drivers/acpi/namespace/nsinit.c b/drivers/acpi/namespace/nsinit.c deleted file mode 100644 index e4c57510d798..000000000000 --- a/drivers/acpi/namespace/nsinit.c +++ /dev/null @@ -1,592 +0,0 @@ -/****************************************************************************** - * - * Module Name: nsinit - namespace initialization - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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 <acpi/acnamesp.h> -#include <acpi/acdispat.h> -#include <acpi/acinterp.h> -#include <linux/nmi.h> - -#define _COMPONENT ACPI_NAMESPACE -ACPI_MODULE_NAME("nsinit") - -/* Local prototypes */ -static acpi_status -acpi_ns_init_one_object(acpi_handle obj_handle, - u32 level, void *context, void **return_value); - -static acpi_status -acpi_ns_init_one_device(acpi_handle obj_handle, - u32 nesting_level, void *context, void **return_value); - -static acpi_status -acpi_ns_find_ini_methods(acpi_handle obj_handle, - u32 nesting_level, void *context, void **return_value); - -/******************************************************************************* - * - * FUNCTION: acpi_ns_initialize_objects - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Walk the entire namespace and perform any necessary - * initialization on the objects found therein - * - ******************************************************************************/ - -acpi_status acpi_ns_initialize_objects(void) -{ - acpi_status status; - struct acpi_init_walk_info info; - - ACPI_FUNCTION_TRACE(ns_initialize_objects); - - ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, - "**** Starting initialization of namespace objects ****\n")); - ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, - "Completing Region/Field/Buffer/Package initialization:")); - - /* Set all init info to zero */ - - ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); - - /* Walk entire namespace from the supplied root */ - - status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, acpi_ns_init_one_object, - &info, NULL); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); - } - - ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, - "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n", - info.op_region_init, info.op_region_count, - info.field_init, info.field_count, - info.buffer_init, info.buffer_count, - info.package_init, info.package_count, - info.object_count)); - - ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, - "%hd Control Methods found\n", info.method_count)); - ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, - "%hd Op Regions found\n", info.op_region_count)); - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_initialize_devices - * - * PARAMETERS: None - * - * RETURN: acpi_status - * - * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. - * This means running _INI on all present devices. - * - * Note: We install PCI config space handler on region access, - * not here. - * - ******************************************************************************/ - -acpi_status acpi_ns_initialize_devices(void) -{ - acpi_status status; - struct acpi_device_walk_info info; - - ACPI_FUNCTION_TRACE(ns_initialize_devices); - - /* Init counters */ - - info.device_count = 0; - info.num_STA = 0; - info.num_INI = 0; - - ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, - "Initializing Device/Processor/Thermal objects by executing _INI methods:")); - - /* Tree analysis: find all subtrees that contain _INI methods */ - - status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, FALSE, - acpi_ns_find_ini_methods, &info, NULL); - if (ACPI_FAILURE(status)) { - goto error_exit; - } - - /* Allocate the evaluation information block */ - - info.evaluate_info = - ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); - if (!info.evaluate_info) { - status = AE_NO_MEMORY; - goto error_exit; - } - - /* Walk namespace to execute all _INIs on present devices */ - - status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, FALSE, - acpi_ns_init_one_device, &info, NULL); - - ACPI_FREE(info.evaluate_info); - if (ACPI_FAILURE(status)) { - goto error_exit; - } - - ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, - "\nExecuted %hd _INI methods requiring %hd _STA executions (examined %hd objects)\n", - info.num_INI, info.num_STA, info.device_count)); - - return_ACPI_STATUS(status); - - error_exit: - ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_init_one_object - * - * PARAMETERS: obj_handle - Node - * 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) Op Regions - * - ******************************************************************************/ - -static acpi_status -acpi_ns_init_one_object(acpi_handle obj_handle, - u32 level, void *context, void **return_value) -{ - acpi_object_type type; - acpi_status status = AE_OK; - struct acpi_init_walk_info *info = - (struct acpi_init_walk_info *)context; - struct acpi_namespace_node *node = - (struct acpi_namespace_node *)obj_handle; - union acpi_operand_object *obj_desc; - - ACPI_FUNCTION_NAME(ns_init_one_object); - - info->object_count++; - - /* And even then, we are only interested in a few object types */ - - type = acpi_ns_get_type(obj_handle); - obj_desc = acpi_ns_get_attached_object(node); - if (!obj_desc) { - return (AE_OK); - } - - /* Increment counters for object types we are looking for */ - - switch (type) { - case ACPI_TYPE_REGION: - info->op_region_count++; - break; - - case ACPI_TYPE_BUFFER_FIELD: - info->field_count++; - break; - - case ACPI_TYPE_LOCAL_BANK_FIELD: - info->field_count++; - break; - - case ACPI_TYPE_BUFFER: - info->buffer_count++; - break; - - case ACPI_TYPE_PACKAGE: - info->package_count++; - break; - - default: - - /* No init required, just exit now */ - return (AE_OK); - } - - /* - * If the object is already initialized, nothing else to do - */ - if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { - return (AE_OK); - } - - /* - * Must lock the interpreter before executing AML code - */ - acpi_ex_enter_interpreter(); - - /* - * Each of these types can contain executable AML code within the - * declaration. - */ - switch (type) { - case ACPI_TYPE_REGION: - - info->op_region_init++; - status = acpi_ds_get_region_arguments(obj_desc); - break; - - case ACPI_TYPE_BUFFER_FIELD: - - info->field_init++; - status = acpi_ds_get_buffer_field_arguments(obj_desc); - break; - - case ACPI_TYPE_LOCAL_BANK_FIELD: - - info->field_init++; - status = acpi_ds_get_bank_field_arguments(obj_desc); - break; - - case ACPI_TYPE_BUFFER: - - info->buffer_init++; - status = acpi_ds_get_buffer_arguments(obj_desc); - break; - - case ACPI_TYPE_PACKAGE: - - info->package_init++; - status = acpi_ds_get_package_arguments(obj_desc); - break; - - default: - /* No other types can get here */ - break; - } - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Could not execute arguments for [%4.4s] (%s)", - acpi_ut_get_node_name(node), - acpi_ut_get_type_name(type))); - } - - /* - * Print a dot for each object unless we are going to print the entire - * pathname - */ - if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { - ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); - } - - /* - * We ignore errors from above, and always return OK, since we don't want - * to abort the walk on any single error. - */ - acpi_ex_exit_interpreter(); - return (AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_find_ini_methods - * - * PARAMETERS: acpi_walk_callback - * - * RETURN: acpi_status - * - * DESCRIPTION: Called during namespace walk. Finds objects named _INI under - * device/processor/thermal objects, and marks the entire subtree - * with a SUBTREE_HAS_INI flag. This flag is used during the - * subsequent device initialization walk to avoid entire subtrees - * that do not contain an _INI. - * - ******************************************************************************/ - -static acpi_status -acpi_ns_find_ini_methods(acpi_handle obj_handle, - u32 nesting_level, void *context, void **return_value) -{ - struct acpi_device_walk_info *info = - ACPI_CAST_PTR(struct acpi_device_walk_info, context); - struct acpi_namespace_node *node; - struct acpi_namespace_node *parent_node; - - /* Keep count of device/processor/thermal objects */ - - node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); - if ((node->type == ACPI_TYPE_DEVICE) || - (node->type == ACPI_TYPE_PROCESSOR) || - (node->type == ACPI_TYPE_THERMAL)) { - info->device_count++; - return (AE_OK); - } - - /* We are only looking for methods named _INI */ - - if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) { - return (AE_OK); - } - - /* - * The only _INI methods that we care about are those that are - * present under Device, Processor, and Thermal objects. - */ - parent_node = acpi_ns_get_parent_node(node); - switch (parent_node->type) { - case ACPI_TYPE_DEVICE: - case ACPI_TYPE_PROCESSOR: - case ACPI_TYPE_THERMAL: - - /* Mark parent and bubble up the INI present flag to the root */ - - while (parent_node) { - parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; - parent_node = acpi_ns_get_parent_node(parent_node); - } - break; - - default: - break; - } - - return (AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_init_one_device - * - * PARAMETERS: acpi_walk_callback - * - * RETURN: acpi_status - * - * DESCRIPTION: This is called once per device soon after ACPI is enabled - * to initialize each device. It determines if the device is - * present, and if so, calls _INI. - * - ******************************************************************************/ - -static acpi_status -acpi_ns_init_one_device(acpi_handle obj_handle, - u32 nesting_level, void *context, void **return_value) -{ - struct acpi_device_walk_info *walk_info = - ACPI_CAST_PTR(struct acpi_device_walk_info, context); - struct acpi_evaluate_info *info = walk_info->evaluate_info; - u32 flags; - acpi_status status; - struct acpi_namespace_node *device_node; - - ACPI_FUNCTION_TRACE(ns_init_one_device); - - /* We are interested in Devices, Processors and thermal_zones only */ - - device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); - if ((device_node->type != ACPI_TYPE_DEVICE) && - (device_node->type != ACPI_TYPE_PROCESSOR) && - (device_node->type != ACPI_TYPE_THERMAL)) { - return_ACPI_STATUS(AE_OK); - } - - /* - * Because of an earlier namespace analysis, all subtrees that contain an - * _INI method are tagged. - * - * If this device subtree does not contain any _INI methods, we - * can exit now and stop traversing this entire subtree. - */ - if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { - return_ACPI_STATUS(AE_CTRL_DEPTH); - } - - /* - * Run _STA to determine if this device is present and functioning. We - * must know this information for two important reasons (from ACPI spec): - * - * 1) We can only run _INI if the device is present. - * 2) We must abort the device tree walk on this subtree if the device is - * not present and is not functional (we will not examine the children) - * - * The _STA method is not required to be present under the device, we - * assume the device is present if _STA does not exist. - */ - ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname - (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); - - status = acpi_ut_execute_STA(device_node, &flags); - if (ACPI_FAILURE(status)) { - - /* Ignore error and move on to next device */ - - return_ACPI_STATUS(AE_OK); - } - - /* - * Flags == -1 means that _STA was not found. In this case, we assume that - * the device is both present and functional. - * - * From the ACPI spec, description of _STA: - * - * "If a device object (including the processor object) does not have an - * _STA object, then OSPM assumes that all of the above bits are set (in - * other words, the device is present, ..., and functioning)" - */ - if (flags != ACPI_UINT32_MAX) { - walk_info->num_STA++; - } - - /* - * Examine the PRESENT and FUNCTIONING status bits - * - * Note: ACPI spec does not seem to specify behavior for the present but - * not functioning case, so we assume functioning if present. - */ - if (!(flags & ACPI_STA_DEVICE_PRESENT)) { - - /* Device is not present, we must examine the Functioning bit */ - - if (flags & ACPI_STA_DEVICE_FUNCTIONING) { - /* - * Device is not present but is "functioning". In this case, - * we will not run _INI, but we continue to examine the children - * of this device. - * - * From the ACPI spec, description of _STA: (Note - no mention - * of whether to run _INI or not on the device in question) - * - * "_STA may return bit 0 clear (not present) with bit 3 set - * (device is functional). This case is used to indicate a valid - * device for which no device driver should be loaded (for example, - * a bridge device.) Children of this device may be present and - * valid. OSPM should continue enumeration below a device whose - * _STA returns this bit combination" - */ - return_ACPI_STATUS(AE_OK); - } else { - /* - * Device is not present and is not functioning. We must abort the - * walk of this subtree immediately -- don't look at the children - * of such a device. - * - * From the ACPI spec, description of _INI: - * - * "If the _STA method indicates that the device is not present, - * OSPM will not run the _INI and will not examine the children - * of the device for _INI methods" - */ - return_ACPI_STATUS(AE_CTRL_DEPTH); - } - } - - /* - * The device is present or is assumed present if no _STA exists. - * Run the _INI if it exists (not required to exist) - * - * Note: We know there is an _INI within this subtree, but it may not be - * under this particular device, it may be lower in the branch. - */ - ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname - (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI)); - - info->prefix_node = device_node; - info->pathname = METHOD_NAME__INI; - info->parameters = NULL; - info->flags = ACPI_IGNORE_RETURN_VALUE; - - /* - * Some hardware relies on this being executed as atomically - * as possible (without an NMI being received in the middle of - * this) - so disable NMIs and initialize the device: - */ - acpi_nmi_disable(); - status = acpi_ns_evaluate(info); - acpi_nmi_enable(); - - if (ACPI_SUCCESS(status)) { - walk_info->num_INI++; - - if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && - (!(acpi_dbg_level & ACPI_LV_INFO))) { - ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); - } - } -#ifdef ACPI_DEBUG_OUTPUT - else if (status != AE_NOT_FOUND) { - - /* Ignore error and move on to next device */ - - char *scope_name = - acpi_ns_get_external_pathname(info->resolved_node); - - ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution", - scope_name)); - ACPI_FREE(scope_name); - } -#endif - - /* Ignore errors from above */ - - status = AE_OK; - - /* - * The _INI method has been run if present; call the Global Initialization - * Handler for this device. - */ - if (acpi_gbl_init_handler) { - status = - acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); - } - - return_ACPI_STATUS(status); -} |