0,0 → 1,607 |
/****************************************************************************** |
* |
* Module Name: nsinit - namespace initialization |
* |
*****************************************************************************/ |
|
/* |
* 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 "acnamesp.h" |
#include "acdispat.h" |
#include "acinterp.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:\n")); |
|
/* Set all init info to zero */ |
|
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, |
NULL, &info, NULL); |
if (ACPI_FAILURE(status)) { |
ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); |
} |
|
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
" Initialized %u/%u Regions %u/%u Fields %u/%u " |
"Buffers %u/%u Packages (%u 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, |
"%u Control Methods found\n%u Op Regions found\n", |
info.method_count, 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 " |
"and executing _INI/_STA methods:\n")); |
|
/* 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, NULL, &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; |
} |
|
/* |
* Execute the "global" _INI method that may appear at the root. This |
* support is provided for Windows compatibility (Vista+) and is not |
* part of the ACPI specification. |
*/ |
info.evaluate_info->prefix_node = acpi_gbl_root_node; |
info.evaluate_info->relative_pathname = METHOD_NAME__INI; |
info.evaluate_info->parameters = NULL; |
info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; |
|
status = acpi_ns_evaluate(info.evaluate_info); |
if (ACPI_SUCCESS(status)) { |
info.num_INI++; |
} |
|
/* 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, NULL, &info, |
NULL); |
|
/* |
* Any _OSI requests should be completed by now. If the BIOS has |
* requested any Windows OSI strings, we will always truncate |
* I/O addresses to 16 bits -- for Windows compatibility. |
*/ |
if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) { |
acpi_gbl_truncate_io_addresses = TRUE; |
} |
|
ACPI_FREE(info.evaluate_info); |
if (ACPI_FAILURE(status)) { |
goto error_exit; |
} |
|
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
" Executed %u _INI methods requiring %u _STA executions " |
"(examined %u 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))); |
} |
|
/* |
* 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 = node->parent; |
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 = parent_node->parent; |
} |
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)); |
|
memset(info, 0, sizeof(struct acpi_evaluate_info)); |
info->prefix_node = device_node; |
info->relative_pathname = METHOD_NAME__INI; |
info->parameters = NULL; |
info->flags = ACPI_IGNORE_RETURN_VALUE; |
|
status = acpi_ns_evaluate(info); |
|
if (ACPI_SUCCESS(status)) { |
walk_info->num_INI++; |
} |
#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->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); |
} |