diff options
Diffstat (limited to 'drivers/acpi/acpica/psxface.c')
-rw-r--r-- | drivers/acpi/acpica/psxface.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c new file mode 100644 index 000000000..a6509aeb2 --- /dev/null +++ b/drivers/acpi/acpica/psxface.c @@ -0,0 +1,341 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/****************************************************************************** + * + * Module Name: psxface - Parser external interfaces + * + * Copyright (C) 2000 - 2022, Intel Corp. + * + *****************************************************************************/ + +#include <acpi/acpi.h> +#include "accommon.h" +#include "acparser.h" +#include "acdispat.h" +#include "acinterp.h" +#include "actables.h" +#include "acnamesp.h" + +#define _COMPONENT ACPI_PARSER +ACPI_MODULE_NAME("psxface") + +/* Local Prototypes */ +static void +acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action); + +/******************************************************************************* + * + * FUNCTION: acpi_debug_trace + * + * PARAMETERS: method_name - Valid ACPI name string + * debug_level - Optional level mask. 0 to use default + * debug_layer - Optional layer mask. 0 to use default + * flags - bit 1: one shot(1) or persistent(0) + * + * RETURN: Status + * + * DESCRIPTION: External interface to enable debug tracing during control + * method execution + * + ******************************************************************************/ + +acpi_status +acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags) +{ + acpi_status status; + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return (status); + } + + acpi_gbl_trace_method_name = name; + acpi_gbl_trace_flags = flags; + acpi_gbl_trace_dbg_level = debug_level; + acpi_gbl_trace_dbg_layer = debug_layer; + status = AE_OK; + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ps_execute_method + * + * PARAMETERS: info - Method info block, contains: + * node - Method Node to execute + * obj_desc - Method object + * parameters - List of parameters to pass to the method, + * terminated by NULL. Params itself may be + * NULL if no parameters are being passed. + * return_object - Where to put method's return value (if + * any). If NULL, no value is returned. + * parameter_type - Type of Parameter list + * return_object - Where to put method's return value (if + * any). If NULL, no value is returned. + * pass_number - Parse or execute pass + * + * RETURN: Status + * + * DESCRIPTION: Execute a control method + * + ******************************************************************************/ + +acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) +{ + acpi_status status; + union acpi_parse_object *op; + struct acpi_walk_state *walk_state; + + ACPI_FUNCTION_TRACE(ps_execute_method); + + /* Quick validation of DSDT header */ + + acpi_tb_check_dsdt_header(); + + /* Validate the Info and method Node */ + + if (!info || !info->node) { + return_ACPI_STATUS(AE_NULL_ENTRY); + } + + /* Init for new method, wait on concurrency semaphore */ + + status = + acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * The caller "owns" the parameters, so give each one an extra reference + */ + acpi_ps_update_parameter_list(info, REF_INCREMENT); + + /* + * Execute the method. Performs parse simultaneously + */ + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n", + info->node->name.ascii, info->node, info->obj_desc)); + + /* Create and init a Root Node */ + + op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start); + if (!op) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Create and initialize a new walk state */ + + info->pass_number = ACPI_IMODE_EXECUTE; + walk_state = + acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL, + NULL, NULL); + if (!walk_state) { + status = AE_NO_MEMORY; + goto cleanup; + } + + status = acpi_ds_init_aml_walk(walk_state, op, info->node, + info->obj_desc->method.aml_start, + info->obj_desc->method.aml_length, info, + info->pass_number); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + walk_state->method_pathname = info->full_pathname; + walk_state->method_is_nested = FALSE; + + if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) { + walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL; + } + + /* Invoke an internal method if necessary */ + + if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) { + status = + info->obj_desc->method.dispatch.implementation(walk_state); + info->return_object = walk_state->return_desc; + + /* Cleanup states */ + + acpi_ds_scope_stack_clear(walk_state); + acpi_ps_cleanup_scope(&walk_state->parser_state); + acpi_ds_terminate_control_method(walk_state->method_desc, + walk_state); + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + /* + * Start method evaluation with an implicit return of zero. + * This is done for Windows compatibility. + */ + if (acpi_gbl_enable_interpreter_slack) { + walk_state->implicit_return_obj = + acpi_ut_create_integer_object((u64) 0); + if (!walk_state->implicit_return_obj) { + status = AE_NO_MEMORY; + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + } + + /* Parse the AML */ + + status = acpi_ps_parse_aml(walk_state); + + /* walk_state was deleted by parse_aml */ + +cleanup: + acpi_ps_delete_parse_tree(op); + + /* Take away the extra reference that we gave the parameters above */ + + acpi_ps_update_parameter_list(info, REF_DECREMENT); + + /* Exit now if error above */ + + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * If the method has returned an object, signal this to the caller with + * a control exception code + */ + if (info->return_object) { + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n", + info->return_object)); + ACPI_DUMP_STACK_ENTRY(info->return_object); + + status = AE_CTRL_RETURN_VALUE; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ps_execute_table + * + * PARAMETERS: info - Method info block, contains: + * node - Node to where the is entered into the + * namespace + * obj_desc - Pseudo method object describing the AML + * code of the entire table + * pass_number - Parse or execute pass + * + * RETURN: Status + * + * DESCRIPTION: Execute a table + * + ******************************************************************************/ + +acpi_status acpi_ps_execute_table(struct acpi_evaluate_info *info) +{ + acpi_status status; + union acpi_parse_object *op = NULL; + struct acpi_walk_state *walk_state = NULL; + + ACPI_FUNCTION_TRACE(ps_execute_table); + + /* Create and init a Root Node */ + + op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start); + if (!op) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Create and initialize a new walk state */ + + walk_state = + acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL, + NULL, NULL); + if (!walk_state) { + status = AE_NO_MEMORY; + goto cleanup; + } + + status = acpi_ds_init_aml_walk(walk_state, op, info->node, + info->obj_desc->method.aml_start, + info->obj_desc->method.aml_length, info, + info->pass_number); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + walk_state->method_pathname = info->full_pathname; + walk_state->method_is_nested = FALSE; + + if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) { + walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL; + } + + /* Info->Node is the default location to load the table */ + + if (info->node && info->node != acpi_gbl_root_node) { + status = + acpi_ds_scope_stack_push(info->node, ACPI_TYPE_METHOD, + walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + } + + /* + * Parse the AML, walk_state will be deleted by parse_aml + */ + acpi_ex_enter_interpreter(); + status = acpi_ps_parse_aml(walk_state); + acpi_ex_exit_interpreter(); + walk_state = NULL; + +cleanup: + if (walk_state) { + acpi_ds_delete_walk_state(walk_state); + } + if (op) { + acpi_ps_delete_parse_tree(op); + } + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ps_update_parameter_list + * + * PARAMETERS: info - See struct acpi_evaluate_info + * (Used: parameter_type and Parameters) + * action - Add or Remove reference + * + * RETURN: Status + * + * DESCRIPTION: Update reference count on all method parameter objects + * + ******************************************************************************/ + +static void +acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action) +{ + u32 i; + + if (info->parameters) { + + /* Update reference count for each parameter */ + + for (i = 0; info->parameters[i]; i++) { + + /* Ignore errors, just do them all */ + + (void)acpi_ut_update_object_reference(info-> + parameters[i], + action); + } + } +} |