20  * struct sfp_bus - internal representation of a sfp bus
124  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
136 int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,  in sfp_parse_port()  argument
175 		dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n",  in sfp_parse_port()
199  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
205 bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id)  in sfp_may_have_phy()  argument
226  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
233 void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,  in sfp_parse_support()  argument
335 		dev_warn(bus->sfp_dev,  in sfp_parse_support()
362 	if (bus->sfp_quirk)  in sfp_parse_support()
363 		bus->sfp_quirk->modes(id, modes);  in sfp_parse_support()
375  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
381 phy_interface_t sfp_select_interface(struct sfp_bus *bus,  in sfp_select_interface()  argument
402 	dev_warn(bus->sfp_dev, "Unable to ascertain link mode\n");  in sfp_select_interface()
411 static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)  in sfp_get_upstream_ops()  argument
413 	return bus->registered ? bus->upstream_ops : NULL;  in sfp_get_upstream_ops()
449 	struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);  in sfp_bus_release()  local
451 	list_del(&bus->node);  in sfp_bus_release()
453 	kfree(bus);  in sfp_bus_release()
458  * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
463 void sfp_bus_put(struct sfp_bus *bus)  in sfp_bus_put()  argument
465 	if (bus)  in sfp_bus_put()
466 		kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);  in sfp_bus_put()
470 static int sfp_register_bus(struct sfp_bus *bus)  in sfp_register_bus()  argument
472 	const struct sfp_upstream_ops *ops = bus->upstream_ops;  in sfp_register_bus()
477 			ops->link_down(bus->upstream);  in sfp_register_bus()
478 		if (ops->connect_phy && bus->phydev) {  in sfp_register_bus()
479 			ret = ops->connect_phy(bus->upstream, bus->phydev);  in sfp_register_bus()
484 	bus->registered = true;  in sfp_register_bus()
485 	bus->socket_ops->attach(bus->sfp);  in sfp_register_bus()
486 	if (bus->started)  in sfp_register_bus()
487 		bus->socket_ops->start(bus->sfp);  in sfp_register_bus()
488 	bus->upstream_ops->attach(bus->upstream, bus);  in sfp_register_bus()
492 static void sfp_unregister_bus(struct sfp_bus *bus)  in sfp_unregister_bus()  argument
494 	const struct sfp_upstream_ops *ops = bus->upstream_ops;  in sfp_unregister_bus()
496 	if (bus->registered) {  in sfp_unregister_bus()
497 		bus->upstream_ops->detach(bus->upstream, bus);  in sfp_unregister_bus()
498 		if (bus->started)  in sfp_unregister_bus()
499 			bus->socket_ops->stop(bus->sfp);  in sfp_unregister_bus()
500 		bus->socket_ops->detach(bus->sfp);  in sfp_unregister_bus()
501 		if (bus->phydev && ops && ops->disconnect_phy)  in sfp_unregister_bus()
502 			ops->disconnect_phy(bus->upstream);  in sfp_unregister_bus()
504 	bus->registered = false;  in sfp_unregister_bus()
509  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
513  * the sfp bus specified by @bus.
517 int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)  in sfp_get_module_info()  argument
519 	return bus->socket_ops->module_info(bus->sfp, modinfo);  in sfp_get_module_info()
525  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
534 int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,  in sfp_get_module_eeprom()  argument
537 	return bus->socket_ops->module_eeprom(bus->sfp, ee, data);  in sfp_get_module_eeprom()
543  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
550 void sfp_upstream_start(struct sfp_bus *bus)  in sfp_upstream_start()  argument
552 	if (bus->registered)  in sfp_upstream_start()
553 		bus->socket_ops->start(bus->sfp);  in sfp_upstream_start()
554 	bus->started = true;  in sfp_upstream_start()
560  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
567 void sfp_upstream_stop(struct sfp_bus *bus)  in sfp_upstream_stop()  argument
569 	if (bus->registered)  in sfp_upstream_stop()
570 		bus->socket_ops->stop(bus->sfp);  in sfp_upstream_stop()
571 	bus->started = false;  in sfp_upstream_stop()
575 static void sfp_upstream_clear(struct sfp_bus *bus)  in sfp_upstream_clear()  argument
577 	bus->upstream_ops = NULL;  in sfp_upstream_clear()
578 	bus->upstream = NULL;  in sfp_upstream_clear()
582  * sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode
585  * Parse the parent device's firmware node for a SFP bus, and locate
596  * 	      - %-ENOMEM if we failed to allocate the bus.
602 	struct sfp_bus *bus;  in sfp_bus_find_fwnode()  local
617 	bus = sfp_bus_get(ref.fwnode);  in sfp_bus_find_fwnode()
619 	if (!bus)  in sfp_bus_find_fwnode()
622 	return bus;  in sfp_bus_find_fwnode()
628  * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
632  * Add upstream driver for the SFP bus, and if the bus is complete, register
633  * the SFP bus using sfp_register_upstream().  This takes a reference on the
634  * bus, so it is safe to put the bus after this call.
643  * 	      - %-ENOMEM if we failed to allocate the bus.
646 int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,  in sfp_bus_add_upstream()  argument
651 	/* If no bus, return success */  in sfp_bus_add_upstream()
652 	if (!bus)  in sfp_bus_add_upstream()
656 	kref_get(&bus->kref);  in sfp_bus_add_upstream()
657 	bus->upstream_ops = ops;  in sfp_bus_add_upstream()
658 	bus->upstream = upstream;  in sfp_bus_add_upstream()
660 	if (bus->sfp) {  in sfp_bus_add_upstream()
661 		ret = sfp_register_bus(bus);  in sfp_bus_add_upstream()
663 			sfp_upstream_clear(bus);  in sfp_bus_add_upstream()
670 		sfp_bus_put(bus);  in sfp_bus_add_upstream()
677  * sfp_bus_del_upstream() - Delete a sfp bus
678  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
681  * module. @bus should have been added by sfp_bus_add_upstream().
683 void sfp_bus_del_upstream(struct sfp_bus *bus)  in sfp_bus_del_upstream()  argument
685 	if (bus) {  in sfp_bus_del_upstream()
687 		if (bus->sfp)  in sfp_bus_del_upstream()
688 			sfp_unregister_bus(bus);  in sfp_bus_del_upstream()
689 		sfp_upstream_clear(bus);  in sfp_bus_del_upstream()
692 		sfp_bus_put(bus);  in sfp_bus_del_upstream()
698 int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)  in sfp_add_phy()  argument
700 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_add_phy()
704 		ret = ops->connect_phy(bus->upstream, phydev);  in sfp_add_phy()
707 		bus->phydev = phydev;  in sfp_add_phy()
713 void sfp_remove_phy(struct sfp_bus *bus)  in sfp_remove_phy()  argument
715 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_remove_phy()
718 		ops->disconnect_phy(bus->upstream);  in sfp_remove_phy()
719 	bus->phydev = NULL;  in sfp_remove_phy()
723 void sfp_link_up(struct sfp_bus *bus)  in sfp_link_up()  argument
725 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_link_up()
728 		ops->link_up(bus->upstream);  in sfp_link_up()
732 void sfp_link_down(struct sfp_bus *bus)  in sfp_link_down()  argument
734 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_link_down()
737 		ops->link_down(bus->upstream);  in sfp_link_down()
741 int sfp_module_insert(struct sfp_bus *bus, const struct sfp_eeprom_id *id)  in sfp_module_insert()  argument
743 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_insert()
746 	bus->sfp_quirk = sfp_lookup_quirk(id);  in sfp_module_insert()
749 		ret = ops->module_insert(bus->upstream, id);  in sfp_module_insert()
755 void sfp_module_remove(struct sfp_bus *bus)  in sfp_module_remove()  argument
757 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_remove()
760 		ops->module_remove(bus->upstream);  in sfp_module_remove()
762 	bus->sfp_quirk = NULL;  in sfp_module_remove()
766 int sfp_module_start(struct sfp_bus *bus)  in sfp_module_start()  argument
768 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_start()
772 		ret = ops->module_start(bus->upstream);  in sfp_module_start()
778 void sfp_module_stop(struct sfp_bus *bus)  in sfp_module_stop()  argument
780 	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);  in sfp_module_stop()
783 		ops->module_stop(bus->upstream);  in sfp_module_stop()
787 static void sfp_socket_clear(struct sfp_bus *bus)  in sfp_socket_clear()  argument
789 	bus->sfp_dev = NULL;  in sfp_socket_clear()
790 	bus->sfp = NULL;  in sfp_socket_clear()
791 	bus->socket_ops = NULL;  in sfp_socket_clear()
797 	struct sfp_bus *bus = sfp_bus_get(dev->fwnode);  in sfp_register_socket()  local
800 	if (bus) {  in sfp_register_socket()
802 		bus->sfp_dev = dev;  in sfp_register_socket()
803 		bus->sfp = sfp;  in sfp_register_socket()
804 		bus->socket_ops = ops;  in sfp_register_socket()
806 		if (bus->upstream_ops) {  in sfp_register_socket()
807 			ret = sfp_register_bus(bus);  in sfp_register_socket()
809 				sfp_socket_clear(bus);  in sfp_register_socket()
815 		sfp_bus_put(bus);  in sfp_register_socket()
816 		bus = NULL;  in sfp_register_socket()
819 	return bus;  in sfp_register_socket()
823 void sfp_unregister_socket(struct sfp_bus *bus)  in sfp_unregister_socket()  argument
826 	if (bus->upstream_ops)  in sfp_unregister_socket()
827 		sfp_unregister_bus(bus);  in sfp_unregister_socket()
828 	sfp_socket_clear(bus);  in sfp_unregister_socket()
831 	sfp_bus_put(bus);  in sfp_unregister_socket()