680 lines
19 KiB
C
680 lines
19 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: nsinit - namespace initialization
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*
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* Copyright (C) 2000 - 2019, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acevents.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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static acpi_status
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acpi_ns_find_ini_methods(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_EXEC,
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"[Init] Completing Initialization of ACPI Objects\n"));
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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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"Final data object initialization: "));
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/* Clear the info block */
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memset(&info, 0, sizeof(struct acpi_init_walk_info));
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/* Walk entire namespace from the supplied root */
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/*
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* TBD: will become ACPI_TYPE_PACKAGE as this type object
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* is now the only one that supports deferred initialization
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* (forward references).
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*/
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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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NULL, &info, NULL);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"Namespace contains %u (0x%X) objects\n",
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info.object_count, info.object_count));
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"%u Control Methods found\n%u Op Regions found\n",
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info.method_count, 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(u32 flags)
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{
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acpi_status status = AE_OK;
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struct acpi_device_walk_info info;
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acpi_handle handle;
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ACPI_FUNCTION_TRACE(ns_initialize_devices);
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if (!(flags & ACPI_NO_DEVICE_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Initializing ACPI Devices\n"));
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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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"Initializing Device/Processor/Thermal objects "
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"and executing _INI/_STA methods:\n"));
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/* Tree analysis: find all subtrees that contain _INI methods */
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, FALSE,
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acpi_ns_find_ini_methods, NULL,
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&info, NULL);
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if (ACPI_FAILURE(status)) {
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goto error_exit;
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}
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/* Allocate the evaluation information block */
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info.evaluate_info =
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ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
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if (!info.evaluate_info) {
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status = AE_NO_MEMORY;
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goto error_exit;
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}
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/*
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* Execute the "global" _INI method that may appear at the root.
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* This support is provided for Windows compatibility (Vista+) and
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* is not part of the ACPI specification.
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*/
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info.evaluate_info->prefix_node = acpi_gbl_root_node;
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info.evaluate_info->relative_pathname = METHOD_NAME__INI;
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info.evaluate_info->parameters = NULL;
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info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
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status = acpi_ns_evaluate(info.evaluate_info);
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if (ACPI_SUCCESS(status)) {
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info.num_INI++;
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}
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/*
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* Execute \_SB._INI.
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* There appears to be a strict order requirement for \_SB._INI,
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* which should be evaluated before any _REG evaluations.
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*/
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status = acpi_get_handle(NULL, "\\_SB", &handle);
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if (ACPI_SUCCESS(status)) {
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memset(info.evaluate_info, 0,
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sizeof(struct acpi_evaluate_info));
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info.evaluate_info->prefix_node = handle;
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info.evaluate_info->relative_pathname =
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METHOD_NAME__INI;
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info.evaluate_info->parameters = NULL;
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info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
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status = acpi_ns_evaluate(info.evaluate_info);
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if (ACPI_SUCCESS(status)) {
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info.num_INI++;
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}
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}
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}
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/*
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* Run all _REG methods
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*
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* Note: Any objects accessed by the _REG methods will be automatically
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* initialized, even if they contain executable AML (see the call to
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* acpi_ns_initialize_objects below).
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*
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* Note: According to the ACPI specification, we actually needn't execute
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* _REG for system_memory/system_io operation regions, but for PCI_Config
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* operation regions, it is required to evaluate _REG for those on a PCI
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* root bus that doesn't contain _BBN object. So this code is kept here
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* in order not to break things.
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*/
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if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"[Init] Executing _REG OpRegion methods\n"));
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status = acpi_ev_initialize_op_regions();
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if (ACPI_FAILURE(status)) {
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goto error_exit;
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}
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}
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if (!(flags & ACPI_NO_DEVICE_INIT)) {
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/* Walk namespace to execute all _INIs on present devices */
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, FALSE,
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acpi_ns_init_one_device, NULL,
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&info, NULL);
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/*
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* Any _OSI requests should be completed by now. If the BIOS has
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* requested any Windows OSI strings, we will always truncate
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* I/O addresses to 16 bits -- for Windows compatibility.
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*/
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if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
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acpi_gbl_truncate_io_addresses = TRUE;
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}
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ACPI_FREE(info.evaluate_info);
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if (ACPI_FAILURE(status)) {
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goto error_exit;
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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" Executed %u _INI methods requiring %u _STA executions "
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"(examined %u objects)\n",
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info.num_INI, info.num_STA,
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info.device_count));
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}
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return_ACPI_STATUS(status);
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error_exit:
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ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
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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_package
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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 - Not used
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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 package
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* within the namespace. Used during dynamic load of an SSDT.
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*
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******************************************************************************/
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acpi_status
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acpi_ns_init_one_package(acpi_handle obj_handle,
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u32 level, void *context, void **return_value)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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struct acpi_namespace_node *node =
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(struct acpi_namespace_node *)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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/* Exit if package is already initialized */
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if (obj_desc->package.flags & AOPOBJ_DATA_VALID) {
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return (AE_OK);
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}
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status = acpi_ds_get_package_arguments(obj_desc);
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if (ACPI_FAILURE(status)) {
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return (AE_OK);
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}
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status =
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acpi_ut_walk_package_tree(obj_desc, NULL,
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acpi_ds_init_package_element, NULL);
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if (ACPI_FAILURE(status)) {
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return (AE_OK);
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}
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obj_desc->package.flags |= AOPOBJ_DATA_VALID;
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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_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 = AE_OK;
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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_LOCAL_BANK_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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/* If the object is already initialized, nothing else to do */
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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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/* Must lock the interpreter before executing AML code */
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acpi_ex_enter_interpreter();
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/*
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* Only initialization of Package objects can be deferred, in order
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* to support forward references.
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*/
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switch (type) {
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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/* TBD: bank_fields do not require deferred init, remove this code */
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info->field_init++;
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status = acpi_ds_get_bank_field_arguments(obj_desc);
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break;
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case ACPI_TYPE_PACKAGE:
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/* Complete the initialization/resolution of the package object */
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info->package_init++;
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status =
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acpi_ns_init_one_package(obj_handle, level, NULL, NULL);
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break;
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default:
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/* No other types should get here */
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status = AE_TYPE;
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ACPI_EXCEPTION((AE_INFO, status,
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"Opcode is not deferred [%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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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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* 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_find_ini_methods
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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: Called during namespace walk. Finds objects named _INI under
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* device/processor/thermal objects, and marks the entire subtree
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* with a SUBTREE_HAS_INI flag. This flag is used during the
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* subsequent device initialization walk to avoid entire subtrees
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* that do not contain an _INI.
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_find_ini_methods(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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ACPI_CAST_PTR(struct acpi_device_walk_info, context);
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struct acpi_namespace_node *node;
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struct acpi_namespace_node *parent_node;
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/* Keep count of device/processor/thermal objects */
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node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
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if ((node->type == ACPI_TYPE_DEVICE) ||
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(node->type == ACPI_TYPE_PROCESSOR) ||
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(node->type == ACPI_TYPE_THERMAL)) {
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info->device_count++;
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return (AE_OK);
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}
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/* We are only looking for methods named _INI */
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if (!ACPI_COMPARE_NAMESEG(node->name.ascii, METHOD_NAME__INI)) {
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return (AE_OK);
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}
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/*
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* The only _INI methods that we care about are those that are
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* present under Device, Processor, and Thermal objects.
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*/
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parent_node = node->parent;
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switch (parent_node->type) {
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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/* Mark parent and bubble up the INI present flag to the root */
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while (parent_node) {
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parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
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parent_node = parent_node->parent;
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}
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break;
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default:
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break;
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}
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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 *walk_info =
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ACPI_CAST_PTR(struct acpi_device_walk_info, context);
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struct acpi_evaluate_info *info = walk_info->evaluate_info;
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u32 flags;
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acpi_status status;
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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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/* We are interested in Devices, Processors and thermal_zones only */
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device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
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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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/*
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* Because of an earlier namespace analysis, all subtrees that contain an
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* _INI method are tagged.
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*
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* If this device subtree does not contain any _INI methods, we
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* can exit now and stop traversing this entire subtree.
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*/
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if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
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return_ACPI_STATUS(AE_CTRL_DEPTH);
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}
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/*
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* Run _STA to determine if this device is present and functioning. We
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* must know this information for two important reasons (from ACPI spec):
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*
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* 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.
|
|
*/
|
|
if (!ACPI_COMPARE_NAMESEG(device_node->name.ascii, "_SB_") ||
|
|
device_node->parent != acpi_gbl_root_node) {
|
|
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_normalized_pathname(device_node, TRUE);
|
|
|
|
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);
|
|
}
|