1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/export.h>
3 #include <linux/kref.h>
4 #include <linux/list.h>
5 #include <linux/mutex.h>
6 #include <linux/phylink.h>
7 #include <linux/property.h>
8 #include <linux/rtnetlink.h>
9 #include <linux/slab.h>
16 void (*modes)(const struct sfp_eeprom_id *id, unsigned long *modes);
20 * struct sfp_bus - internal representation of a sfp bus
25 struct list_head node;
26 struct fwnode_handle *fwnode;
28 const struct sfp_socket_ops *socket_ops;
29 struct device *sfp_dev;
31 const struct sfp_quirk *sfp_quirk;
33 const struct sfp_upstream_ops *upstream_ops;
35 struct phy_device *phydev;
41 static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id,
44 phylink_set(modes, 2500baseX_Full);
47 static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id,
50 /* Ubiquiti U-Fiber Instant module claims that support all transceiver
51 * types including 10G Ethernet which is not truth. So clear all claimed
52 * modes and set only one mode which module supports: 1000baseX_Full.
55 phylink_set(modes, 1000baseX_Full);
58 static const struct sfp_quirk sfp_quirks[] = {
60 // Alcatel Lucent G-010S-P can operate at 2500base-X, but
61 // incorrectly report 2500MBd NRZ in their EEPROM
62 .vendor = "ALCATELLUCENT",
64 .modes = sfp_quirk_2500basex,
66 // Alcatel Lucent G-010S-A can operate at 2500base-X, but
67 // report 3.2GBd NRZ in their EEPROM
68 .vendor = "ALCATELLUCENT",
70 .modes = sfp_quirk_2500basex,
72 // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd
73 // NRZ in their EEPROM
76 .modes = sfp_quirk_2500basex,
80 .modes = sfp_quirk_ubnt_uf_instant,
84 static size_t sfp_strlen(const char *str, size_t maxlen)
88 /* Trailing characters should be filled with space chars */
89 for (i = 0, size = 0; i < maxlen; i++)
96 static bool sfp_match(const char *qs, const char *str, size_t len)
100 if (strlen(qs) != len)
102 return !strncmp(qs, str, len);
105 static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id)
107 const struct sfp_quirk *q;
111 vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name));
112 ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn));
114 for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++)
115 if (sfp_match(q->vendor, id->base.vendor_name, vs) &&
116 sfp_match(q->part, id->base.vendor_pn, ps))
123 * sfp_parse_port() - Parse the EEPROM base ID, setting the port type
124 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
125 * @id: a pointer to the module's &struct sfp_eeprom_id
126 * @support: optional pointer to an array of unsigned long for the
127 * ethtool support mask
129 * Parse the EEPROM identification given in @id, and return one of
130 * %PORT_TP, %PORT_FIBRE or %PORT_OTHER. If @support is non-%NULL,
131 * also set the ethtool %ETHTOOL_LINK_MODE_xxx_BIT corresponding with
132 * the connector type.
134 * If the port type is not known, returns %PORT_OTHER.
136 int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
137 unsigned long *support)
141 /* port is the physical connector, set this from the connector field. */
142 switch (id->base.connector) {
143 case SFF8024_CONNECTOR_SC:
144 case SFF8024_CONNECTOR_FIBERJACK:
145 case SFF8024_CONNECTOR_LC:
146 case SFF8024_CONNECTOR_MT_RJ:
147 case SFF8024_CONNECTOR_MU:
148 case SFF8024_CONNECTOR_OPTICAL_PIGTAIL:
149 case SFF8024_CONNECTOR_MPO_1X12:
150 case SFF8024_CONNECTOR_MPO_2X16:
154 case SFF8024_CONNECTOR_RJ45:
158 case SFF8024_CONNECTOR_COPPER_PIGTAIL:
162 case SFF8024_CONNECTOR_UNSPEC:
163 if (id->base.e1000_base_t) {
168 case SFF8024_CONNECTOR_SG: /* guess */
169 case SFF8024_CONNECTOR_HSSDC_II:
170 case SFF8024_CONNECTOR_NOSEPARATE:
171 case SFF8024_CONNECTOR_MXC_2X16:
175 dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n",
184 phylink_set(support, FIBRE);
188 phylink_set(support, TP);
195 EXPORT_SYMBOL_GPL(sfp_parse_port);
198 * sfp_may_have_phy() - indicate whether the module may have a PHY
199 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
200 * @id: a pointer to the module's &struct sfp_eeprom_id
202 * Parse the EEPROM identification given in @id, and return whether
203 * this module may have a PHY.
205 bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
207 if (id->base.e1000_base_t)
210 if (id->base.phys_id != SFF8024_ID_DWDM_SFP) {
211 switch (id->base.extended_cc) {
212 case SFF8024_ECC_10GBASE_T_SFI:
213 case SFF8024_ECC_10GBASE_T_SR:
214 case SFF8024_ECC_5GBASE_T:
215 case SFF8024_ECC_2_5GBASE_T:
222 EXPORT_SYMBOL_GPL(sfp_may_have_phy);
225 * sfp_parse_support() - Parse the eeprom id for supported link modes
226 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
227 * @id: a pointer to the module's &struct sfp_eeprom_id
228 * @support: pointer to an array of unsigned long for the ethtool support mask
230 * Parse the EEPROM identification information and derive the supported
231 * ethtool link modes for the module.
233 void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
234 unsigned long *support)
236 unsigned int br_min, br_nom, br_max;
237 __ETHTOOL_DECLARE_LINK_MODE_MASK(modes) = { 0, };
239 /* Decode the bitrate information to MBd */
240 br_min = br_nom = br_max = 0;
241 if (id->base.br_nominal) {
242 if (id->base.br_nominal != 255) {
243 br_nom = id->base.br_nominal * 100;
244 br_min = br_nom - id->base.br_nominal * id->ext.br_min;
245 br_max = br_nom + id->base.br_nominal * id->ext.br_max;
246 } else if (id->ext.br_max) {
247 br_nom = 250 * id->ext.br_max;
248 br_max = br_nom + br_nom * id->ext.br_min / 100;
249 br_min = br_nom - br_nom * id->ext.br_min / 100;
252 /* When using passive cables, in case neither BR,min nor BR,max
253 * are specified, set br_min to 0 as the nominal value is then
254 * used as the maximum.
256 if (br_min == br_max && id->base.sfp_ct_passive)
260 /* Set ethtool support from the compliance fields. */
261 if (id->base.e10g_base_sr)
262 phylink_set(modes, 10000baseSR_Full);
263 if (id->base.e10g_base_lr)
264 phylink_set(modes, 10000baseLR_Full);
265 if (id->base.e10g_base_lrm)
266 phylink_set(modes, 10000baseLRM_Full);
267 if (id->base.e10g_base_er)
268 phylink_set(modes, 10000baseER_Full);
269 if (id->base.e1000_base_sx ||
270 id->base.e1000_base_lx ||
271 id->base.e1000_base_cx)
272 phylink_set(modes, 1000baseX_Full);
273 if (id->base.e1000_base_t) {
274 phylink_set(modes, 1000baseT_Half);
275 phylink_set(modes, 1000baseT_Full);
278 /* 1000Base-PX or 1000Base-BX10 */
279 if ((id->base.e_base_px || id->base.e_base_bx10) &&
280 br_min <= 1300 && br_max >= 1200)
281 phylink_set(modes, 1000baseX_Full);
283 /* 100Base-FX, 100Base-LX, 100Base-PX, 100Base-BX10 */
284 if (id->base.e100_base_fx || id->base.e100_base_lx)
285 phylink_set(modes, 100baseFX_Full);
286 if ((id->base.e_base_px || id->base.e_base_bx10) && br_nom == 100)
287 phylink_set(modes, 100baseFX_Full);
289 /* For active or passive cables, select the link modes
290 * based on the bit rates and the cable compliance bytes.
292 if ((id->base.sfp_ct_passive || id->base.sfp_ct_active) && br_nom) {
293 /* This may look odd, but some manufacturers use 12000MBd */
294 if (br_min <= 12000 && br_max >= 10300)
295 phylink_set(modes, 10000baseCR_Full);
296 if (br_min <= 3200 && br_max >= 3100)
297 phylink_set(modes, 2500baseX_Full);
298 if (br_min <= 1300 && br_max >= 1200)
299 phylink_set(modes, 1000baseX_Full);
301 if (id->base.sfp_ct_passive) {
302 if (id->base.passive.sff8431_app_e)
303 phylink_set(modes, 10000baseCR_Full);
305 if (id->base.sfp_ct_active) {
306 if (id->base.active.sff8431_app_e ||
307 id->base.active.sff8431_lim) {
308 phylink_set(modes, 10000baseCR_Full);
312 switch (id->base.extended_cc) {
313 case SFF8024_ECC_UNSPEC:
315 case SFF8024_ECC_100GBASE_SR4_25GBASE_SR:
316 phylink_set(modes, 100000baseSR4_Full);
317 phylink_set(modes, 25000baseSR_Full);
319 case SFF8024_ECC_100GBASE_LR4_25GBASE_LR:
320 case SFF8024_ECC_100GBASE_ER4_25GBASE_ER:
321 phylink_set(modes, 100000baseLR4_ER4_Full);
323 case SFF8024_ECC_100GBASE_CR4:
324 phylink_set(modes, 100000baseCR4_Full);
326 case SFF8024_ECC_25GBASE_CR_S:
327 case SFF8024_ECC_25GBASE_CR_N:
328 phylink_set(modes, 25000baseCR_Full);
330 case SFF8024_ECC_10GBASE_T_SFI:
331 case SFF8024_ECC_10GBASE_T_SR:
332 phylink_set(modes, 10000baseT_Full);
334 case SFF8024_ECC_5GBASE_T:
335 phylink_set(modes, 5000baseT_Full);
337 case SFF8024_ECC_2_5GBASE_T:
338 phylink_set(modes, 2500baseT_Full);
341 dev_warn(bus->sfp_dev,
342 "Unknown/unsupported extended compliance code: 0x%02x\n",
343 id->base.extended_cc);
347 /* For fibre channel SFP, derive possible BaseX modes */
348 if (id->base.fc_speed_100 ||
349 id->base.fc_speed_200 ||
350 id->base.fc_speed_400) {
351 if (id->base.br_nominal >= 31)
352 phylink_set(modes, 2500baseX_Full);
353 if (id->base.br_nominal >= 12)
354 phylink_set(modes, 1000baseX_Full);
357 /* If we haven't discovered any modes that this module supports, try
358 * the bitrate to determine supported modes. Some BiDi modules (eg,
359 * 1310nm/1550nm) are not 1000BASE-BX compliant due to the differing
360 * wavelengths, so do not set any transceiver bits.
362 * Do the same for modules supporting 2500BASE-X. Note that some
363 * modules use 2500Mbaud rather than 3100 or 3200Mbaud for
364 * 2500BASE-X, so we allow some slack here.
366 if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS) && br_nom) {
367 if (br_min <= 1300 && br_max >= 1200)
368 phylink_set(modes, 1000baseX_Full);
369 if (br_min <= 3200 && br_max >= 2500)
370 phylink_set(modes, 2500baseX_Full);
374 bus->sfp_quirk->modes(id, modes);
376 bitmap_or(support, support, modes, __ETHTOOL_LINK_MODE_MASK_NBITS);
378 phylink_set(support, Autoneg);
379 phylink_set(support, Pause);
380 phylink_set(support, Asym_Pause);
382 EXPORT_SYMBOL_GPL(sfp_parse_support);
385 * sfp_select_interface() - Select appropriate phy_interface_t mode
386 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
387 * @link_modes: ethtool link modes mask
389 * Derive the phy_interface_t mode for the SFP module from the link
392 phy_interface_t sfp_select_interface(struct sfp_bus *bus,
393 unsigned long *link_modes)
395 if (phylink_test(link_modes, 10000baseCR_Full) ||
396 phylink_test(link_modes, 10000baseSR_Full) ||
397 phylink_test(link_modes, 10000baseLR_Full) ||
398 phylink_test(link_modes, 10000baseLRM_Full) ||
399 phylink_test(link_modes, 10000baseER_Full) ||
400 phylink_test(link_modes, 10000baseT_Full))
401 return PHY_INTERFACE_MODE_10GBASER;
403 if (phylink_test(link_modes, 2500baseX_Full))
404 return PHY_INTERFACE_MODE_2500BASEX;
406 if (phylink_test(link_modes, 1000baseT_Half) ||
407 phylink_test(link_modes, 1000baseT_Full))
408 return PHY_INTERFACE_MODE_SGMII;
410 if (phylink_test(link_modes, 1000baseX_Full))
411 return PHY_INTERFACE_MODE_1000BASEX;
413 if (phylink_test(link_modes, 100baseFX_Full))
414 return PHY_INTERFACE_MODE_100BASEX;
416 dev_warn(bus->sfp_dev, "Unable to ascertain link mode\n");
418 return PHY_INTERFACE_MODE_NA;
420 EXPORT_SYMBOL_GPL(sfp_select_interface);
422 static LIST_HEAD(sfp_buses);
423 static DEFINE_MUTEX(sfp_mutex);
425 static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)
427 return bus->registered ? bus->upstream_ops : NULL;
430 static struct sfp_bus *sfp_bus_get(struct fwnode_handle *fwnode)
432 struct sfp_bus *sfp, *new, *found = NULL;
434 new = kzalloc(sizeof(*new), GFP_KERNEL);
436 mutex_lock(&sfp_mutex);
438 list_for_each_entry(sfp, &sfp_buses, node) {
439 if (sfp->fwnode == fwnode) {
440 kref_get(&sfp->kref);
447 kref_init(&new->kref);
448 new->fwnode = fwnode;
449 list_add(&new->node, &sfp_buses);
454 mutex_unlock(&sfp_mutex);
461 static void sfp_bus_release(struct kref *kref)
463 struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);
465 list_del(&bus->node);
466 mutex_unlock(&sfp_mutex);
471 * sfp_bus_put() - put a reference on the &struct sfp_bus
472 * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
474 * Put a reference on the &struct sfp_bus and free the underlying structure
475 * if this was the last reference.
477 void sfp_bus_put(struct sfp_bus *bus)
480 kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
482 EXPORT_SYMBOL_GPL(sfp_bus_put);
484 static int sfp_register_bus(struct sfp_bus *bus)
486 const struct sfp_upstream_ops *ops = bus->upstream_ops;
491 ops->link_down(bus->upstream);
492 if (ops->connect_phy && bus->phydev) {
493 ret = ops->connect_phy(bus->upstream, bus->phydev);
498 bus->registered = true;
499 bus->socket_ops->attach(bus->sfp);
501 bus->socket_ops->start(bus->sfp);
502 bus->upstream_ops->attach(bus->upstream, bus);
506 static void sfp_unregister_bus(struct sfp_bus *bus)
508 const struct sfp_upstream_ops *ops = bus->upstream_ops;
510 if (bus->registered) {
511 bus->upstream_ops->detach(bus->upstream, bus);
513 bus->socket_ops->stop(bus->sfp);
514 bus->socket_ops->detach(bus->sfp);
515 if (bus->phydev && ops && ops->disconnect_phy)
516 ops->disconnect_phy(bus->upstream);
518 bus->registered = false;
522 * sfp_get_module_info() - Get the ethtool_modinfo for a SFP module
523 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
524 * @modinfo: a &struct ethtool_modinfo
526 * Fill in the type and eeprom_len parameters in @modinfo for a module on
527 * the sfp bus specified by @bus.
529 * Returns 0 on success or a negative errno number.
531 int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)
533 return bus->socket_ops->module_info(bus->sfp, modinfo);
535 EXPORT_SYMBOL_GPL(sfp_get_module_info);
538 * sfp_get_module_eeprom() - Read the SFP module EEPROM
539 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
540 * @ee: a &struct ethtool_eeprom
541 * @data: buffer to contain the EEPROM data (must be at least @ee->len bytes)
543 * Read the EEPROM as specified by the supplied @ee. See the documentation
544 * for &struct ethtool_eeprom for the region to be read.
546 * Returns 0 on success or a negative errno number.
548 int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,
551 return bus->socket_ops->module_eeprom(bus->sfp, ee, data);
553 EXPORT_SYMBOL_GPL(sfp_get_module_eeprom);
556 * sfp_upstream_start() - Inform the SFP that the network device is up
557 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
559 * Inform the SFP socket that the network device is now up, so that the
560 * module can be enabled by allowing TX_DISABLE to be deasserted. This
561 * should be called from the network device driver's &struct net_device_ops
564 void sfp_upstream_start(struct sfp_bus *bus)
567 bus->socket_ops->start(bus->sfp);
570 EXPORT_SYMBOL_GPL(sfp_upstream_start);
573 * sfp_upstream_stop() - Inform the SFP that the network device is down
574 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
576 * Inform the SFP socket that the network device is now up, so that the
577 * module can be disabled by asserting TX_DISABLE, disabling the laser
578 * in optical modules. This should be called from the network device
579 * driver's &struct net_device_ops ndo_stop() method.
581 void sfp_upstream_stop(struct sfp_bus *bus)
584 bus->socket_ops->stop(bus->sfp);
585 bus->started = false;
587 EXPORT_SYMBOL_GPL(sfp_upstream_stop);
589 static void sfp_upstream_clear(struct sfp_bus *bus)
591 bus->upstream_ops = NULL;
592 bus->upstream = NULL;
596 * sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode
597 * @fwnode: firmware node for the parent device (MAC or PHY)
599 * Parse the parent device's firmware node for a SFP bus, and locate
600 * the sfp_bus structure, incrementing its reference count. This must
601 * be put via sfp_bus_put() when done.
604 * - on success, a pointer to the sfp_bus structure,
605 * - %NULL if no SFP is specified,
606 * - on failure, an error pointer value:
608 * - corresponding to the errors detailed for
609 * fwnode_property_get_reference_args().
610 * - %-ENOMEM if we failed to allocate the bus.
611 * - an error from the upstream's connect_phy() method.
613 struct sfp_bus *sfp_bus_find_fwnode(struct fwnode_handle *fwnode)
615 struct fwnode_reference_args ref;
619 ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL,
626 bus = sfp_bus_get(ref.fwnode);
627 fwnode_handle_put(ref.fwnode);
629 return ERR_PTR(-ENOMEM);
633 EXPORT_SYMBOL_GPL(sfp_bus_find_fwnode);
636 * sfp_bus_add_upstream() - parse and register the neighbouring device
637 * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
638 * @upstream: the upstream private data
639 * @ops: the upstream's &struct sfp_upstream_ops
641 * Add upstream driver for the SFP bus, and if the bus is complete, register
642 * the SFP bus using sfp_register_upstream(). This takes a reference on the
643 * bus, so it is safe to put the bus after this call.
646 * - on success, a pointer to the sfp_bus structure,
647 * - %NULL if no SFP is specified,
648 * - on failure, an error pointer value:
650 * - corresponding to the errors detailed for
651 * fwnode_property_get_reference_args().
652 * - %-ENOMEM if we failed to allocate the bus.
653 * - an error from the upstream's connect_phy() method.
655 int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
656 const struct sfp_upstream_ops *ops)
660 /* If no bus, return success */
665 kref_get(&bus->kref);
666 bus->upstream_ops = ops;
667 bus->upstream = upstream;
670 ret = sfp_register_bus(bus);
672 sfp_upstream_clear(bus);
683 EXPORT_SYMBOL_GPL(sfp_bus_add_upstream);
686 * sfp_bus_del_upstream() - Delete a sfp bus
687 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
689 * Delete a previously registered upstream connection for the SFP
690 * module. @bus should have been added by sfp_bus_add_upstream().
692 void sfp_bus_del_upstream(struct sfp_bus *bus)
697 sfp_unregister_bus(bus);
698 sfp_upstream_clear(bus);
704 EXPORT_SYMBOL_GPL(sfp_bus_del_upstream);
706 /* Socket driver entry points */
707 int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)
709 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
712 if (ops && ops->connect_phy)
713 ret = ops->connect_phy(bus->upstream, phydev);
716 bus->phydev = phydev;
720 EXPORT_SYMBOL_GPL(sfp_add_phy);
722 void sfp_remove_phy(struct sfp_bus *bus)
724 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
726 if (ops && ops->disconnect_phy)
727 ops->disconnect_phy(bus->upstream);
730 EXPORT_SYMBOL_GPL(sfp_remove_phy);
732 void sfp_link_up(struct sfp_bus *bus)
734 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
736 if (ops && ops->link_up)
737 ops->link_up(bus->upstream);
739 EXPORT_SYMBOL_GPL(sfp_link_up);
741 void sfp_link_down(struct sfp_bus *bus)
743 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
745 if (ops && ops->link_down)
746 ops->link_down(bus->upstream);
748 EXPORT_SYMBOL_GPL(sfp_link_down);
750 int sfp_module_insert(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
752 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
755 bus->sfp_quirk = sfp_lookup_quirk(id);
757 if (ops && ops->module_insert)
758 ret = ops->module_insert(bus->upstream, id);
762 EXPORT_SYMBOL_GPL(sfp_module_insert);
764 void sfp_module_remove(struct sfp_bus *bus)
766 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
768 if (ops && ops->module_remove)
769 ops->module_remove(bus->upstream);
771 bus->sfp_quirk = NULL;
773 EXPORT_SYMBOL_GPL(sfp_module_remove);
775 int sfp_module_start(struct sfp_bus *bus)
777 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
780 if (ops && ops->module_start)
781 ret = ops->module_start(bus->upstream);
785 EXPORT_SYMBOL_GPL(sfp_module_start);
787 void sfp_module_stop(struct sfp_bus *bus)
789 const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
791 if (ops && ops->module_stop)
792 ops->module_stop(bus->upstream);
794 EXPORT_SYMBOL_GPL(sfp_module_stop);
796 static void sfp_socket_clear(struct sfp_bus *bus)
800 bus->socket_ops = NULL;
803 struct sfp_bus *sfp_register_socket(struct device *dev, struct sfp *sfp,
804 const struct sfp_socket_ops *ops)
806 struct sfp_bus *bus = sfp_bus_get(dev->fwnode);
813 bus->socket_ops = ops;
815 if (bus->upstream_ops) {
816 ret = sfp_register_bus(bus);
818 sfp_socket_clear(bus);
830 EXPORT_SYMBOL_GPL(sfp_register_socket);
832 void sfp_unregister_socket(struct sfp_bus *bus)
835 if (bus->upstream_ops)
836 sfp_unregister_bus(bus);
837 sfp_socket_clear(bus);
842 EXPORT_SYMBOL_GPL(sfp_unregister_socket);