20  * struct sfp_bus - internal representation of a sfp bus
109  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
121 int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,  in sfp_parse_port()  argument
160 		dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n",  in sfp_parse_port()
184  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
190 bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id)  in sfp_may_have_phy()  argument
211  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
218 void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,  in sfp_parse_support()  argument
320 		dev_warn(bus->sfp_dev,  in sfp_parse_support()
348 	if (bus->sfp_quirk)  in sfp_parse_support()
349 		bus->sfp_quirk->modes(id, modes);  in sfp_parse_support()
361  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
367 phy_interface_t sfp_select_interface(struct sfp_bus *bus,  in sfp_select_interface()  argument
388 	dev_warn(bus->sfp_dev, "Unable to ascertain link mode\n");  in sfp_select_interface()
397 static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)  in sfp_get_upstream_ops()  argument
399 	return bus->registered ? bus->upstream_ops : NULL;  in sfp_get_upstream_ops()
435 	struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);  in sfp_bus_release()  local
437 	list_del(&bus->node);  in sfp_bus_release()
439 	kfree(bus);  in sfp_bus_release()
444  * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
449 void sfp_bus_put(struct sfp_bus *bus)  in sfp_bus_put()  argument
451 	if (bus)  in sfp_bus_put()
452 		kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);  in sfp_bus_put()
456 static int sfp_register_bus(struct sfp_bus *bus)  in sfp_register_bus()  argument
458 	const struct sfp_upstream_ops *ops = bus->upstream_ops;  in sfp_register_bus()
463 			ops->link_down(bus->upstream);  in sfp_register_bus()
464 		if (ops->connect_phy && bus->phydev) {  in sfp_register_bus()
465 			ret = ops->connect_phy(bus->upstream, bus->phydev);  in sfp_register_bus()
470 	bus->registered = true;  in sfp_register_bus()
471 	bus->socket_ops->attach(bus->sfp);  in sfp_register_bus()
472 	if (bus->started)  in sfp_register_bus()
473 		bus->socket_ops->start(bus->sfp);  in sfp_register_bus()
474 	bus->upstream_ops->attach(bus->upstream, bus);  in sfp_register_bus()
478 static void sfp_unregister_bus(struct sfp_bus *bus)  in sfp_unregister_bus()  argument
480 	const struct sfp_upstream_ops *ops = bus->upstream_ops;  in sfp_unregister_bus()
482 	if (bus->registered) {  in sfp_unregister_bus()
483 		bus->upstream_ops->detach(bus->upstream, bus);  in sfp_unregister_bus()
484 		if (bus->started)  in sfp_unregister_bus()
485 			bus->socket_ops->stop(bus->sfp);  in sfp_unregister_bus()
486 		bus->socket_ops->detach(bus->sfp);  in sfp_unregister_bus()
487 		if (bus->phydev && ops && ops->disconnect_phy)  in sfp_unregister_bus()
488 			ops->disconnect_phy(bus->upstream);  in sfp_unregister_bus()
490 	bus->registered = false;  in sfp_unregister_bus()
495  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
499  * the sfp bus specified by @bus.
503 int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)  in sfp_get_module_info()  argument
505 	return bus->socket_ops->module_info(bus->sfp, modinfo);  in sfp_get_module_info()
511  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
520 int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,  in sfp_get_module_eeprom()  argument
523 	return bus->socket_ops->module_eeprom(bus->sfp, ee, data);  in sfp_get_module_eeprom()
529  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
536 void sfp_upstream_start(struct sfp_bus *bus)  in sfp_upstream_start()  argument
538 	if (bus->registered)  in sfp_upstream_start()
539 		bus->socket_ops->start(bus->sfp);  in sfp_upstream_start()
540 	bus->started = true;  in sfp_upstream_start()
546  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
553 void sfp_upstream_stop(struct sfp_bus *bus)  in sfp_upstream_stop()  argument
555 	if (bus->registered)  in sfp_upstream_stop()
556 		bus->socket_ops->stop(bus->sfp);  in sfp_upstream_stop()
557 	bus->started = false;  in sfp_upstream_stop()
561 static void sfp_upstream_clear(struct sfp_bus *bus)  in sfp_upstream_clear()  argument
563 	bus->upstream_ops = NULL;  in sfp_upstream_clear()
564 	bus->upstream = NULL;  in sfp_upstream_clear()
568  * sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode
571  * Parse the parent device's firmware node for a SFP bus, and locate
582  * 	      - %-ENOMEM if we failed to allocate the bus.
588 	struct sfp_bus *bus;  in sfp_bus_find_fwnode()  local
598 	bus = sfp_bus_get(ref.fwnode);  in sfp_bus_find_fwnode()
600 	if (!bus)  in sfp_bus_find_fwnode()
603 	return bus;  in sfp_bus_find_fwnode()
609  * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
613  * Add upstream driver for the SFP bus, and if the bus is complete, register
614  * the SFP bus using sfp_register_upstream().  This takes a reference on the
615  * bus, so it is safe to put the bus after this call.
624  * 	      - %-ENOMEM if we failed to allocate the bus.
627 int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,  in sfp_bus_add_upstream()  argument
632 	/* If no bus, return success */  in sfp_bus_add_upstream()
633 	if (!bus)  in sfp_bus_add_upstream()
637 	kref_get(&bus->kref);  in sfp_bus_add_upstream()
638 	bus->upstream_ops = ops;  in sfp_bus_add_upstream()
639 	bus->upstream = upstream;  in sfp_bus_add_upstream()
641 	if (bus->sfp) {  in sfp_bus_add_upstream()
642 		ret = sfp_register_bus(bus);  in sfp_bus_add_upstream()
644 			sfp_upstream_clear(bus);  in sfp_bus_add_upstream()
651 		sfp_bus_put(bus);  in sfp_bus_add_upstream()
658  * sfp_bus_del_upstream() - Delete a sfp bus
659  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
662  * module. @bus should have been added by sfp_bus_add_upstream().
664 void sfp_bus_del_upstream(struct sfp_bus *bus)  in sfp_bus_del_upstream()  argument
666 	if (bus) {  in sfp_bus_del_upstream()
668 		if (bus->sfp)  in sfp_bus_del_upstream()
669 			sfp_unregister_bus(bus);  in sfp_bus_del_upstream()
670 		sfp_upstream_clear(bus);  in sfp_bus_del_upstream()
673 		sfp_bus_put(bus);  in sfp_bus_del_upstream()
679 int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)  in sfp_add_phy()  argument
681 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_add_phy()
685 		ret = ops->connect_phy(bus->upstream, phydev);  in sfp_add_phy()
688 		bus->phydev = phydev;  in sfp_add_phy()
694 void sfp_remove_phy(struct sfp_bus *bus)  in sfp_remove_phy()  argument
696 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_remove_phy()
699 		ops->disconnect_phy(bus->upstream);  in sfp_remove_phy()
700 	bus->phydev = NULL;  in sfp_remove_phy()
704 void sfp_link_up(struct sfp_bus *bus)  in sfp_link_up()  argument
706 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_link_up()
709 		ops->link_up(bus->upstream);  in sfp_link_up()
713 void sfp_link_down(struct sfp_bus *bus)  in sfp_link_down()  argument
715 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_link_down()
718 		ops->link_down(bus->upstream);  in sfp_link_down()
722 int sfp_module_insert(struct sfp_bus *bus, const struct sfp_eeprom_id *id)  in sfp_module_insert()  argument
724 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_insert()
727 	bus->sfp_quirk = sfp_lookup_quirk(id);  in sfp_module_insert()
730 		ret = ops->module_insert(bus->upstream, id);  in sfp_module_insert()
736 void sfp_module_remove(struct sfp_bus *bus)  in sfp_module_remove()  argument
738 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_remove()
741 		ops->module_remove(bus->upstream);  in sfp_module_remove()
743 	bus->sfp_quirk = NULL;  in sfp_module_remove()
747 int sfp_module_start(struct sfp_bus *bus)  in sfp_module_start()  argument
749 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_start()
753 		ret = ops->module_start(bus->upstream);  in sfp_module_start()
759 void sfp_module_stop(struct sfp_bus *bus)  in sfp_module_stop()  argument
761 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_stop()
764 		ops->module_stop(bus->upstream);  in sfp_module_stop()
768 static void sfp_socket_clear(struct sfp_bus *bus)  in sfp_socket_clear()  argument
770 	bus->sfp_dev = NULL;  in sfp_socket_clear()
771 	bus->sfp = NULL;  in sfp_socket_clear()
772 	bus->socket_ops = NULL;  in sfp_socket_clear()
778 	struct sfp_bus *bus = sfp_bus_get(dev->fwnode);  in sfp_register_socket()  local
781 	if (bus) {  in sfp_register_socket()
783 		bus->sfp_dev = dev;  in sfp_register_socket()
784 		bus->sfp = sfp;  in sfp_register_socket()
785 		bus->socket_ops = ops;  in sfp_register_socket()
787 		if (bus->upstream_ops) {  in sfp_register_socket()
788 			ret = sfp_register_bus(bus);  in sfp_register_socket()
790 				sfp_socket_clear(bus);  in sfp_register_socket()
796 		sfp_bus_put(bus);  in sfp_register_socket()
797 		bus = NULL;  in sfp_register_socket()
800 	return bus;  in sfp_register_socket()
804 void sfp_unregister_socket(struct sfp_bus *bus)  in sfp_unregister_socket()  argument
807 	if (bus->upstream_ops)  in sfp_unregister_socket()
808 		sfp_unregister_bus(bus);  in sfp_unregister_socket()
809 	sfp_socket_clear(bus);  in sfp_unregister_socket()
812 	sfp_bus_put(bus);  in sfp_unregister_socket()