acpi_status acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, u32 function, u32 region_offset, u32 bit_width, acpi_integer * value) { acpi_status status; acpi_adr_space_handler handler; acpi_adr_space_setup region_setup; union acpi_operand_object *handler_desc; union acpi_operand_object *region_obj2; void *region_context = NULL; ACPI_FUNCTION_TRACE(ev_address_space_dispatch); region_obj2 = acpi_ns_get_secondary_object(region_obj); if (!region_obj2) { return_ACPI_STATUS(AE_NOT_EXIST); } /* Ensure that there is a handler associated with this region */ handler_desc = region_obj->region.handler; if (!handler_desc) { ACPI_ERROR((AE_INFO, "No handler for Region [%4.4s] (%p) [%s]", acpi_ut_get_node_name(region_obj->region.node), region_obj, acpi_ut_get_region_name(region_obj->region. space_id))); return_ACPI_STATUS(AE_NOT_EXIST); } /* * It may be the case that the region has never been initialized. * Some types of regions require special init code */ if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { /* This region has not been initialized yet, do it */ region_setup = handler_desc->address_space.setup; if (!region_setup) { /* No initialization routine, exit with error */ ACPI_ERROR((AE_INFO, "No init routine for region(%p) [%s]", region_obj, acpi_ut_get_region_name(region_obj->region. space_id))); return_ACPI_STATUS(AE_NOT_EXIST); } /* * We must exit the interpreter because the region setup will * potentially execute control methods (for example, the _REG method * for this region) */ acpi_ex_exit_interpreter(); status = region_setup(region_obj, ACPI_REGION_ACTIVATE, handler_desc->address_space.context, ®ion_context); /* Re-enter the interpreter */ acpi_ex_enter_interpreter(); /* Check for failure of the Region Setup */ if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "During region initialization: [%s]", acpi_ut_get_region_name(region_obj-> region. space_id))); return_ACPI_STATUS(status); } /* Region initialization may have been completed by region_setup */ if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; if (region_obj2->extra.region_context) { /* The handler for this region was already installed */ ACPI_FREE(region_context); } else { /* * Save the returned context for use in all accesses to * this particular region */ region_obj2->extra.region_context = region_context; } } } /* We have everything we need, we can invoke the address space handler */ handler = handler_desc->address_space.handler; ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", ®ion_obj->region.handler->address_space, handler, ACPI_FORMAT_NATIVE_UINT(region_obj->region.address + region_offset), acpi_ut_get_region_name(region_obj->region. space_id))); if (!(handler_desc->address_space.handler_flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * For handlers other than the default (supplied) handlers, we must * exit the interpreter because the handler *might* block -- we don't * know what it will do, so we can't hold the lock on the intepreter. */ acpi_ex_exit_interpreter(); } /* Call the handler */ status = handler(function, (region_obj->region.address + region_offset), bit_width, value, handler_desc->address_space.context, region_obj2->extra.region_context); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", acpi_ut_get_region_name(region_obj->region. space_id))); } if (!(handler_desc->address_space.handler_flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * We just returned from a non-default handler, we must re-enter the * interpreter */ acpi_ex_enter_interpreter(); } return_ACPI_STATUS(status); }
acpi_status acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) { struct acpi_evaluate_info *info; union acpi_operand_object *args[3]; union acpi_operand_object *region_obj2; acpi_status status; ACPI_FUNCTION_TRACE(ev_execute_reg_method); region_obj2 = acpi_ns_get_secondary_object(region_obj); if (!region_obj2) { return_ACPI_STATUS(AE_NOT_EXIST); } if (region_obj2->extra.method_REG == NULL) { return_ACPI_STATUS(AE_OK); } /* Allocate and initialize the evaluation information block */ info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); if (!info) { return_ACPI_STATUS(AE_NO_MEMORY); } info->prefix_node = region_obj2->extra.method_REG; info->pathname = NULL; info->parameters = args; info->flags = ACPI_IGNORE_RETURN_VALUE; /* * The _REG method has two arguments: * * Arg0 - Integer: * Operation region space ID Same value as region_obj->Region.space_id * * Arg1 - Integer: * connection status 1 for connecting the handler, 0 for disconnecting * the handler (Passed as a parameter) */ args[0] = acpi_ut_create_integer_object((u64) region_obj->region.space_id); if (!args[0]) { status = AE_NO_MEMORY; goto cleanup1; } args[1] = acpi_ut_create_integer_object((u64) function); if (!args[1]) { status = AE_NO_MEMORY; goto cleanup2; } args[2] = NULL; /* Terminate list */ /* Execute the method, no return value */ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname (ACPI_TYPE_METHOD, info->prefix_node, NULL)); status = acpi_ns_evaluate(info); acpi_ut_remove_reference(args[1]); cleanup2: acpi_ut_remove_reference(args[0]); cleanup1: ACPI_FREE(info); return_ACPI_STATUS(status); }
acpi_status acpi_ev_initialize_region ( union acpi_operand_object *region_obj, u8 acpi_ns_locked) { union acpi_operand_object *handler_obj; union acpi_operand_object *obj_desc; acpi_adr_space_type space_id; struct acpi_namespace_node *node; acpi_status status; struct acpi_namespace_node *method_node; acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG; union acpi_operand_object *region_obj2; ACPI_FUNCTION_TRACE_U32 ("ev_initialize_region", acpi_ns_locked); if (!region_obj) { return_ACPI_STATUS (AE_BAD_PARAMETER); } if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) { return_ACPI_STATUS (AE_OK); } region_obj2 = acpi_ns_get_secondary_object (region_obj); if (!region_obj2) { return_ACPI_STATUS (AE_NOT_EXIST); } node = acpi_ns_get_parent_node (region_obj->region.node); space_id = region_obj->region.space_id; /* Setup defaults */ region_obj->region.handler = NULL; region_obj2->extra.method_REG = NULL; region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE); region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED; /* Find any "_REG" method associated with this region definition */ status = acpi_ns_search_node (*reg_name_ptr, node, ACPI_TYPE_METHOD, &method_node); if (ACPI_SUCCESS (status)) { /* * The _REG method is optional and there can be only one per region * definition. This will be executed when the handler is attached * or removed */ region_obj2->extra.method_REG = method_node; } /* * The following loop depends upon the root Node having no parent * ie: acpi_gbl_root_node->parent_entry being set to NULL */ while (node) { /* Check to see if a handler exists */ handler_obj = NULL; obj_desc = acpi_ns_get_attached_object (node); if (obj_desc) { /* Can only be a handler if the object exists */ switch (node->type) { case ACPI_TYPE_DEVICE: handler_obj = obj_desc->device.handler; break; case ACPI_TYPE_PROCESSOR: handler_obj = obj_desc->processor.handler; break; case ACPI_TYPE_THERMAL: handler_obj = obj_desc->thermal_zone.handler; break; default: /* Ignore other objects */ break; } while (handler_obj) { /* Is this handler of the correct type? */ if (handler_obj->address_space.space_id == space_id) { /* Found correct handler */ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Found handler %p for region %p in obj %p\n", handler_obj, region_obj, obj_desc)); status = acpi_ev_attach_region (handler_obj, region_obj, acpi_ns_locked); /* * Tell all users that this region is usable by running the _REG * method */ if (acpi_ns_locked) { status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } } status = acpi_ev_execute_reg_method (region_obj, 1); if (acpi_ns_locked) { status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } } return_ACPI_STATUS (AE_OK); } /* Try next handler in the list */ handler_obj = handler_obj->address_space.next; } } /* * This node does not have the handler we need; * Pop up one level */ node = acpi_ns_get_parent_node (node); } /* If we get here, there is no handler for this region */ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "No handler for region_type %s(%X) (region_obj %p)\n", acpi_ut_get_region_name (space_id), space_id, region_obj)); return_ACPI_STATUS (AE_NOT_EXIST); }
static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) { void *obj_pointer = NULL; union acpi_operand_object *handler_desc; union acpi_operand_object *second_desc; union acpi_operand_object *next_desc; ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); if (!object) { return_VOID; } /* * Must delete or free any pointers within the object that are not * actual ACPI objects (for example, a raw buffer pointer). */ switch (ACPI_GET_OBJECT_TYPE(object)) { case ACPI_TYPE_STRING: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n", object, object->string.pointer)); /* Free the actual string buffer */ if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { /* But only if it is NOT a pointer into an ACPI table */ obj_pointer = object->string.pointer; } break; case ACPI_TYPE_BUFFER: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n", object, object->buffer.pointer)); /* Free the actual buffer */ if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { /* But only if it is NOT a pointer into an ACPI table */ obj_pointer = object->buffer.pointer; } break; case ACPI_TYPE_PACKAGE: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n", object->package.count)); /* * Elements of the package are not handled here, they are deleted * separately */ /* Free the (variable length) element pointer array */ obj_pointer = object->package.elements; break; case ACPI_TYPE_DEVICE: if (object->device.gpe_block) { (void)acpi_ev_delete_gpe_block(object->device. gpe_block); } /* Walk the handler list for this device */ handler_desc = object->device.handler; while (handler_desc) { next_desc = handler_desc->address_space.next; acpi_ut_remove_reference(handler_desc); handler_desc = next_desc; } break; case ACPI_TYPE_MUTEX: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "***** Mutex %p, OS Mutex %p\n", object, object->mutex.os_mutex)); if (object == acpi_gbl_global_lock_mutex) { /* Global Lock has extra semaphore */ (void) acpi_os_delete_semaphore (acpi_gbl_global_lock_semaphore); acpi_gbl_global_lock_semaphore = NULL; acpi_os_delete_mutex(object->mutex.os_mutex); acpi_gbl_global_lock_mutex = NULL; } else { acpi_ex_unlink_mutex(object); acpi_os_delete_mutex(object->mutex.os_mutex); } break; case ACPI_TYPE_EVENT: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "***** Event %p, OS Semaphore %p\n", object, object->event.os_semaphore)); (void)acpi_os_delete_semaphore(object->event.os_semaphore); object->event.os_semaphore = NULL; break; case ACPI_TYPE_METHOD: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "***** Method %p\n", object)); /* Delete the method mutex if it exists */ if (object->method.mutex) { acpi_os_delete_mutex(object->method.mutex->mutex. os_mutex); acpi_ut_delete_object_desc(object->method.mutex); object->method.mutex = NULL; } break; case ACPI_TYPE_REGION: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "***** Region %p\n", object)); second_desc = acpi_ns_get_secondary_object(object); if (second_desc) { /* * Free the region_context if and only if the handler is one of the * default handlers -- and therefore, we created the context object * locally, it was not created by an external caller. */ handler_desc = object->region.handler; if (handler_desc) { if (handler_desc->address_space.handler_flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { /* Deactivate region and free region context */ if (handler_desc->address_space.setup) { (void)handler_desc-> address_space.setup(object, ACPI_REGION_DEACTIVATE, handler_desc-> address_space. context, &second_desc-> extra. region_context); } } acpi_ut_remove_reference(handler_desc); } /* Now we can free the Extra object */ acpi_ut_delete_object_desc(second_desc); } break; case ACPI_TYPE_BUFFER_FIELD: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "***** Buffer Field %p\n", object)); second_desc = acpi_ns_get_secondary_object(object); if (second_desc) { acpi_ut_delete_object_desc(second_desc); } break; case ACPI_TYPE_LOCAL_BANK_FIELD: ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "***** Bank Field %p\n", object)); second_desc = acpi_ns_get_secondary_object(object); if (second_desc) { acpi_ut_delete_object_desc(second_desc); } break; default: break; } /* Free any allocated memory (pointer within the object) found above */ if (obj_pointer) { ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n", obj_pointer)); ACPI_FREE(obj_pointer); } /* Now the object can be safely deleted */ ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", object, acpi_ut_get_object_type_name(object))); acpi_ut_delete_object_desc(object); return_VOID; }
void acpi_ev_detach_region(union acpi_operand_object *region_obj, u8 acpi_ns_is_locked) { union acpi_operand_object *handler_obj; union acpi_operand_object *obj_desc; union acpi_operand_object **last_obj_ptr; acpi_adr_space_setup region_setup; void **region_context; union acpi_operand_object *region_obj2; acpi_status status; ACPI_FUNCTION_TRACE(ev_detach_region); region_obj2 = acpi_ns_get_secondary_object(region_obj); if (!region_obj2) { return_VOID; } region_context = ®ion_obj2->extra.region_context; /* Get the address handler from the region object */ handler_obj = region_obj->region.handler; if (!handler_obj) { /* This region has no handler, all done */ return_VOID; } /* Find this region in the handler's list */ obj_desc = handler_obj->address_space.region_list; last_obj_ptr = &handler_obj->address_space.region_list; while (obj_desc) { /* Is this the correct Region? */ if (obj_desc == region_obj) { ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "Removing Region %p from address handler %p\n", region_obj, handler_obj)); /* This is it, remove it from the handler's list */ *last_obj_ptr = obj_desc->region.next; obj_desc->region.next = NULL; /* Must clear field */ if (acpi_ns_is_locked) { status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return_VOID; } } /* Now stop region accesses by executing the _REG method */ status = acpi_ev_execute_reg_method(region_obj, 0); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "from region _REG, [%s]", acpi_ut_get_region_name (region_obj->region.space_id))); } if (acpi_ns_is_locked) { status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return_VOID; } } /* * If the region has been activated, call the setup handler with * the deactivate notification */ if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { region_setup = handler_obj->address_space.setup; status = region_setup(region_obj, ACPI_REGION_DEACTIVATE, handler_obj->address_space. context, region_context); /* Init routine may fail, Just ignore errors */ if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "from region handler - deactivate, [%s]", acpi_ut_get_region_name (region_obj->region. space_id))); } region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE); } /* * Remove handler reference in the region * * NOTE: this doesn't mean that the region goes away, the region * is just inaccessible as indicated to the _REG method * * If the region is on the handler's list, this must be the * region's handler */ region_obj->region.handler = NULL; acpi_ut_remove_reference(handler_obj); return_VOID; } /* Walk the linked list of handlers */ last_obj_ptr = &obj_desc->region.next; obj_desc = obj_desc->region.next; } /* If we get here, the region was not in the handler's region list */ ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "Cannot remove region %p from address handler %p\n", region_obj, handler_obj)); return_VOID; }
acpi_status acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, union acpi_operand_object *field_obj, u32 function, u32 region_offset, u32 bit_width, u64 *value) { acpi_status status; acpi_adr_space_handler handler; acpi_adr_space_setup region_setup; union acpi_operand_object *handler_desc; union acpi_operand_object *region_obj2; void *region_context = NULL; struct acpi_connection_info *context; acpi_physical_address address; ACPI_FUNCTION_TRACE(ev_address_space_dispatch); region_obj2 = acpi_ns_get_secondary_object(region_obj); if (!region_obj2) { return_ACPI_STATUS(AE_NOT_EXIST); } /* Ensure that there is a handler associated with this region */ handler_desc = region_obj->region.handler; if (!handler_desc) { ACPI_ERROR((AE_INFO, "No handler for Region [%4.4s] (%p) [%s]", acpi_ut_get_node_name(region_obj->region.node), region_obj, acpi_ut_get_region_name(region_obj->region. space_id))); return_ACPI_STATUS(AE_NOT_EXIST); } context = handler_desc->address_space.context; /* * It may be the case that the region has never been initialized. * Some types of regions require special init code */ if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { /* This region has not been initialized yet, do it */ region_setup = handler_desc->address_space.setup; if (!region_setup) { /* No initialization routine, exit with error */ ACPI_ERROR((AE_INFO, "No init routine for region(%p) [%s]", region_obj, acpi_ut_get_region_name(region_obj->region. space_id))); return_ACPI_STATUS(AE_NOT_EXIST); } /* * We must exit the interpreter because the region setup will * potentially execute control methods (for example, the _REG method * for this region) */ acpi_ex_exit_interpreter(); status = region_setup(region_obj, ACPI_REGION_ACTIVATE, context, ®ion_context); /* Re-enter the interpreter */ acpi_ex_enter_interpreter(); /* Check for failure of the Region Setup */ if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "During region initialization: [%s]", acpi_ut_get_region_name(region_obj-> region. space_id))); return_ACPI_STATUS(status); } /* Region initialization may have been completed by region_setup */ if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; /* * Save the returned context for use in all accesses to * the handler for this particular region */ if (!(region_obj2->extra.region_context)) { region_obj2->extra.region_context = region_context; } } } /* We have everything we need, we can invoke the address space handler */ handler = handler_desc->address_space.handler; address = (region_obj->region.address + region_offset); /* * Special handling for generic_serial_bus and general_purpose_io: * There are three extra parameters that must be passed to the * handler via the context: * 1) Connection buffer, a resource template from Connection() op * 2) Length of the above buffer * 3) Actual access length from the access_as() op * * In addition, for general_purpose_io, the Address and bit_width fields * are defined as follows: * 1) Address is the pin number index of the field (bit offset from * the previous Connection) * 2) bit_width is the actual bit length of the field (number of pins) */ if ((region_obj->region.space_id == ACPI_ADR_SPACE_GSBUS) && context && field_obj) { /* Get the Connection (resource_template) buffer */ context->connection = field_obj->field.resource_buffer; context->length = field_obj->field.resource_length; context->access_length = field_obj->field.access_length; } if ((region_obj->region.space_id == ACPI_ADR_SPACE_GPIO) && context && field_obj) { /* Get the Connection (resource_template) buffer */ context->connection = field_obj->field.resource_buffer; context->length = field_obj->field.resource_length; context->access_length = field_obj->field.access_length; address = field_obj->field.pin_number_index; bit_width = field_obj->field.bit_length; } ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", ®ion_obj->region.handler->address_space, handler, ACPI_FORMAT_UINT64(address), acpi_ut_get_region_name(region_obj->region. space_id))); if (!(handler_desc->address_space.handler_flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * For handlers other than the default (supplied) handlers, we must * exit the interpreter because the handler *might* block -- we don't * know what it will do, so we can't hold the lock on the intepreter. */ acpi_ex_exit_interpreter(); } /* Call the handler */ status = handler(function, address, bit_width, value, context, region_obj2->extra.region_context); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", acpi_ut_get_region_name(region_obj->region. space_id))); } if (!(handler_desc->address_space.handler_flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * We just returned from a non-default handler, we must re-enter the * interpreter */ acpi_ex_enter_interpreter(); } return_ACPI_STATUS(status); }