X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Facpi%2Fevents%2Fevregion.c;h=b7ff3b1629444ff0ed8b6cee8b5111da50a4b829;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=ec81e587f6d797e19de6336f446c48bedfcbc424;hpb=a2c21200f1c81b08cb55e417b68150bba439b646;p=linux-2.6.git diff --git a/drivers/acpi/events/evregion.c b/drivers/acpi/events/evregion.c index ec81e587f..b7ff3b162 100644 --- a/drivers/acpi/events/evregion.c +++ b/drivers/acpi/events/evregion.c @@ -61,7 +61,7 @@ static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPA /******************************************************************************* * - * FUNCTION: acpi_ev_init_address_spaces + * FUNCTION: acpi_ev_install_region_handlers * * PARAMETERS: None * @@ -72,15 +72,20 @@ static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPA ******************************************************************************/ acpi_status -acpi_ev_init_address_spaces ( +acpi_ev_install_region_handlers ( void) { acpi_status status; acpi_native_uint i; - ACPI_FUNCTION_TRACE ("ev_init_address_spaces"); + ACPI_FUNCTION_TRACE ("ev_install_region_handlers"); + status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + /* * All address spaces (PCI Config, EC, SMBus) are scope dependent * and registration must occur for a specific device. @@ -99,9 +104,8 @@ acpi_ev_init_address_spaces ( * has already been installed (via acpi_install_address_space_handler). * Similar for AE_SAME_HANDLER. */ - for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { - status = acpi_install_address_space_handler ((acpi_handle) acpi_gbl_root_node, + status = acpi_ev_install_space_handler (acpi_gbl_root_node, acpi_gbl_default_address_spaces[i], ACPI_DEFAULT_HANDLER, NULL, NULL); switch (status) { @@ -111,15 +115,63 @@ acpi_ev_init_address_spaces ( /* These exceptions are all OK */ + status = AE_OK; break; default: - return_ACPI_STATUS (status); + goto unlock_and_exit; } } - return_ACPI_STATUS (AE_OK); +unlock_and_exit: + (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ev_initialize_op_regions + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Execute _REG methods for all Operation Regions that have + * an installed default region handler. + * + ******************************************************************************/ + +acpi_status +acpi_ev_initialize_op_regions ( + void) +{ + acpi_status status; + acpi_native_uint i; + + + ACPI_FUNCTION_TRACE ("ev_initialize_op_regions"); + + + status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Run the _REG methods for op_regions in each default address space + */ + for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { + /* TBD: Make sure handler is the DEFAULT handler, otherwise + * _REG will have already been run. + */ + status = acpi_ev_execute_reg_methods (acpi_gbl_root_node, + acpi_gbl_default_address_spaces[i]); + } + + (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + return_ACPI_STATUS (status); } @@ -128,7 +180,7 @@ acpi_ev_init_address_spaces ( * FUNCTION: acpi_ev_execute_reg_method * * PARAMETERS: region_obj - Object structure - * Function - On (1) or Off (0) + * Function - Passed to _REG: On (1) or Off (0) * * RETURN: Status * @@ -138,11 +190,12 @@ acpi_ev_init_address_spaces ( acpi_status acpi_ev_execute_reg_method ( - union acpi_operand_object *region_obj, + union acpi_operand_object *region_obj, u32 function) { - union acpi_operand_object *params[3]; - union acpi_operand_object *region_obj2; + struct acpi_parameter_info info; + union acpi_operand_object *params[3]; + union acpi_operand_object *region_obj2; acpi_status status; @@ -159,10 +212,11 @@ acpi_ev_execute_reg_method ( } /* - * _REG method has two arguments - * Arg0: Integer: Operation region space ID + * The _REG method has two arguments: + * + * Arg0, Integer: Operation region space ID * Same value as region_obj->Region.space_id - * Arg1: Integer: connection status + * Arg1, Integer: connection status * 1 for connecting the handler, * 0 for disconnecting the handler * Passed as a parameter @@ -178,16 +232,21 @@ acpi_ev_execute_reg_method ( goto cleanup; } - /* Set up the parameter objects */ + /* Setup the parameter objects */ params[0]->integer.value = region_obj->region.space_id; params[1]->integer.value = function; params[2] = NULL; + info.node = region_obj2->extra.method_REG; + info.parameters = params; + info.parameter_type = ACPI_PARAM_ARGS; + /* Execute the method, no return value */ - ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname (ACPI_TYPE_METHOD, region_obj2->extra.method_REG, NULL)); - status = acpi_ns_evaluate_by_handle (region_obj2->extra.method_REG, params, NULL); + ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname ( + ACPI_TYPE_METHOD, info.node, NULL)); + status = acpi_ns_evaluate_by_handle (&info); acpi_ut_remove_reference (params[1]); @@ -203,7 +262,6 @@ cleanup: * FUNCTION: acpi_ev_address_space_dispatch * * PARAMETERS: region_obj - Internal region object - * space_id - ID of the address space (0-255) * Function - Read or Write operation * Address - Where in the space to read or write * bit_width - Field width in bits (8, 16, 32, or 64) @@ -326,7 +384,7 @@ acpi_ev_address_space_dispatch ( ACPI_FORMAT_UINT64 (address), acpi_ut_get_region_name (region_obj->region.space_id))); - if (!(handler_desc->address_space.flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { + if (!(handler_desc->address_space.hflags & 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 @@ -347,7 +405,7 @@ acpi_ev_address_space_dispatch ( acpi_format_exception (status))); } - if (!(handler_desc->address_space.flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { + if (!(handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * We just returned from a non-default handler, we must re-enter the * interpreter @@ -366,8 +424,8 @@ acpi_ev_address_space_dispatch ( * * FUNCTION: acpi_ev_detach_region * - * PARAMETERS: region_obj - Region Object - * acpi_ns_is_locked - Namespace Region Already Locked? + * PARAMETERS: region_obj - Region Object + * acpi_ns_is_locked - Namespace Region Already Locked? * * RETURN: None * @@ -501,9 +559,9 @@ acpi_ev_detach_region( * * FUNCTION: acpi_ev_attach_region * - * PARAMETERS: handler_obj - Handler Object - * region_obj - Region Object - * acpi_ns_is_locked - Namespace Region Already Locked? + * PARAMETERS: handler_obj - Handler Object + * region_obj - Region Object + * acpi_ns_is_locked - Namespace Region Already Locked? * * RETURN: None * @@ -676,6 +734,273 @@ acpi_ev_install_handler ( return (status); } + +/******************************************************************************* + * + * FUNCTION: acpi_ev_install_space_handler + * + * PARAMETERS: Node - Namespace node for the device + * space_id - The address space ID + * Handler - Address of the handler + * Setup - Address of the setup function + * Context - Value passed to the handler on each access + * + * RETURN: Status + * + * DESCRIPTION: Install a handler for all op_regions of a given space_id. + * Assumes namespace is locked + * + ******************************************************************************/ + +acpi_status +acpi_ev_install_space_handler ( + struct acpi_namespace_node *node, + acpi_adr_space_type space_id, + acpi_adr_space_handler handler, + acpi_adr_space_setup setup, + void *context) +{ + union acpi_operand_object *obj_desc; + union acpi_operand_object *handler_obj; + acpi_status status; + acpi_object_type type; + u16 flags = 0; + + + ACPI_FUNCTION_TRACE ("ev_install_space_handler"); + + + /* + * This registration is valid for only the types below + * and the root. This is where the default handlers + * get placed. + */ + if ((node->type != ACPI_TYPE_DEVICE) && + (node->type != ACPI_TYPE_PROCESSOR) && + (node->type != ACPI_TYPE_THERMAL) && + (node != acpi_gbl_root_node)) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + if (handler == ACPI_DEFAULT_HANDLER) { + flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; + + switch (space_id) { + case ACPI_ADR_SPACE_SYSTEM_MEMORY: + handler = acpi_ex_system_memory_space_handler; + setup = acpi_ev_system_memory_region_setup; + break; + + case ACPI_ADR_SPACE_SYSTEM_IO: + handler = acpi_ex_system_io_space_handler; + setup = acpi_ev_io_space_region_setup; + break; + + case ACPI_ADR_SPACE_PCI_CONFIG: + handler = acpi_ex_pci_config_space_handler; + setup = acpi_ev_pci_config_region_setup; + break; + + case ACPI_ADR_SPACE_CMOS: + handler = acpi_ex_cmos_space_handler; + setup = acpi_ev_cmos_region_setup; + break; + + case ACPI_ADR_SPACE_PCI_BAR_TARGET: + handler = acpi_ex_pci_bar_space_handler; + setup = acpi_ev_pci_bar_region_setup; + break; + + case ACPI_ADR_SPACE_DATA_TABLE: + handler = acpi_ex_data_table_space_handler; + setup = NULL; + break; + + default: + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + } + + /* If the caller hasn't specified a setup routine, use the default */ + + if (!setup) { + setup = acpi_ev_default_region_setup; + } + + /* Check for an existing internal object */ + + obj_desc = acpi_ns_get_attached_object (node); + if (obj_desc) { + /* + * The attached device object already exists. + * Make sure the handler is not already installed. + */ + handler_obj = obj_desc->device.handler; + + /* Walk the handler list for this device */ + + while (handler_obj) { + /* Same space_id indicates a handler already installed */ + + if (handler_obj->address_space.space_id == space_id) { + if (handler_obj->address_space.handler == handler) { + /* + * It is (relatively) OK to attempt to install the SAME + * handler twice. This can easily happen with PCI_Config space. + */ + status = AE_SAME_HANDLER; + goto unlock_and_exit; + } + else { + /* A handler is already installed */ + + status = AE_ALREADY_EXISTS; + } + goto unlock_and_exit; + } + + /* Walk the linked list of handlers */ + + handler_obj = handler_obj->address_space.next; + } + } + else { + ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, + "Creating object on Device %p while installing handler\n", node)); + + /* obj_desc does not exist, create one */ + + if (node->type == ACPI_TYPE_ANY) { + type = ACPI_TYPE_DEVICE; + } + else { + type = node->type; + } + + obj_desc = acpi_ut_create_internal_object (type); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto unlock_and_exit; + } + + /* Init new descriptor */ + + obj_desc->common.type = (u8) type; + + /* Attach the new object to the Node */ + + status = acpi_ns_attach_object (node, obj_desc, type); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference (obj_desc); + + if (ACPI_FAILURE (status)) { + goto unlock_and_exit; + } + } + + ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, + "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", + acpi_ut_get_region_name (space_id), space_id, + acpi_ut_get_node_name (node), node, obj_desc)); + + /* + * Install the handler + * + * At this point there is no existing handler. + * Just allocate the object for the handler and link it + * into the list. + */ + handler_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_ADDRESS_HANDLER); + if (!handler_obj) { + status = AE_NO_MEMORY; + goto unlock_and_exit; + } + + /* Init handler obj */ + + handler_obj->address_space.space_id = (u8) space_id; + handler_obj->address_space.hflags = flags; + handler_obj->address_space.region_list = NULL; + handler_obj->address_space.node = node; + handler_obj->address_space.handler = handler; + handler_obj->address_space.context = context; + handler_obj->address_space.setup = setup; + + /* Install at head of Device.address_space list */ + + handler_obj->address_space.next = obj_desc->device.handler; + + /* + * The Device object is the first reference on the handler_obj. + * Each region that uses the handler adds a reference. + */ + obj_desc->device.handler = handler_obj; + + /* + * Walk the namespace finding all of the regions this + * handler will manage. + * + * Start at the device and search the branch toward + * the leaf nodes until either the leaf is encountered or + * a device is detected that has an address handler of the + * same type. + * + * In either case, back up and search down the remainder + * of the branch + */ + status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, + ACPI_NS_WALK_UNLOCK, acpi_ev_install_handler, + handler_obj, NULL); + +unlock_and_exit: + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ev_execute_reg_methods + * + * PARAMETERS: Node - Namespace node for the device + * space_id - The address space ID + * + * RETURN: Status + * + * DESCRIPTION: Run all _REG methods for the input Space ID; + * Note: assumes namespace is locked, or system init time. + * + ******************************************************************************/ + +acpi_status +acpi_ev_execute_reg_methods ( + struct acpi_namespace_node *node, + acpi_adr_space_type space_id) +{ + acpi_status status; + + + ACPI_FUNCTION_TRACE ("ev_execute_reg_methods"); + + + /* + * Run all _REG methods for all Operation Regions for this + * space ID. This is a separate walk in order to handle any + * interdependencies between regions and _REG methods. (i.e. handlers + * must be installed for all regions of this Space ID before we + * can run any _REG methods) + */ + status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, + ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, + &space_id, NULL); + + return_ACPI_STATUS (status); +} + + /******************************************************************************* * * FUNCTION: acpi_ev_reg_run @@ -693,19 +1018,13 @@ acpi_ev_reg_run ( void *context, void **return_value) { - union acpi_operand_object *handler_obj; union acpi_operand_object *obj_desc; struct acpi_namespace_node *node; + acpi_adr_space_type space_id; acpi_status status; - handler_obj = (union acpi_operand_object *) context; - - /* Parameter validation */ - - if (!handler_obj) { - return (AE_OK); - } + space_id = *ACPI_CAST_PTR (acpi_adr_space_type, context); /* Convert and validate the device handle */ @@ -732,10 +1051,9 @@ acpi_ev_reg_run ( return (AE_OK); } - /* Object is a Region */ - if (obj_desc->region.space_id != handler_obj->address_space.space_id) { + if (obj_desc->region.space_id != space_id) { /* * This region is for a different address space * -- just ignore it