forked from ~ljy/RK356X_SDK_RELEASE
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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/net/phy/sfp-bus.c
....@@ -1,8 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/export.h>
23 #include <linux/kref.h>
34 #include <linux/list.h>
45 #include <linux/mutex.h>
56 #include <linux/phylink.h>
7
+#include <linux/property.h>
68 #include <linux/rtnetlink.h>
79 #include <linux/slab.h>
810 
....@@ -30,7 +32,6 @@
3032 
3133 	const struct sfp_upstream_ops *upstream_ops;
3234 	void *upstream;
33
-	struct net_device *netdev;
3435 	struct phy_device *phydev;
3536 
3637 	bool registered;
....@@ -41,6 +42,17 @@
4142 				unsigned long *modes)
4243 {
4344 	phylink_set(modes, 2500baseX_Full);
45
+}
46
+
47
+static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id,
48
+				      unsigned long *modes)
49
+{
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.
53
+	 */
54
+	phylink_zero(modes);
55
+	phylink_set(modes, 1000baseX_Full);
4456 }
4557 
4658 static const struct sfp_quirk sfp_quirks[] = {
....@@ -62,6 +74,16 @@
6274 		.vendor = "HUAWEI",
6375 		.part = "MA5671A",
6476 		.modes = sfp_quirk_2500basex,
77
+	}, {
78
+		// Lantech 8330-262D-E can operate at 2500base-X, but
79
+		// incorrectly report 2500MBd NRZ in their EEPROM
80
+		.vendor = "Lantech",
81
+		.part = "8330-262D-E",
82
+		.modes = sfp_quirk_2500basex,
83
+	}, {
84
+		.vendor = "UBNT",
85
+		.part = "UF-INSTANT",
86
+		.modes = sfp_quirk_ubnt_uf_instant,
6587 	},
6688 };
6789 
....@@ -102,6 +124,7 @@
102124 
103125 	return NULL;
104126 }
127
+
105128 /**
106129  * sfp_parse_port() - Parse the EEPROM base ID, setting the port type
107130  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
....@@ -123,35 +146,35 @@
123146 
124147 	/* port is the physical connector, set this from the connector field. */
125148 	switch (id->base.connector) {
126
-	case SFP_CONNECTOR_SC:
127
-	case SFP_CONNECTOR_FIBERJACK:
128
-	case SFP_CONNECTOR_LC:
129
-	case SFP_CONNECTOR_MT_RJ:
130
-	case SFP_CONNECTOR_MU:
131
-	case SFP_CONNECTOR_OPTICAL_PIGTAIL:
149
+	case SFF8024_CONNECTOR_SC:
150
+	case SFF8024_CONNECTOR_FIBERJACK:
151
+	case SFF8024_CONNECTOR_LC:
152
+	case SFF8024_CONNECTOR_MT_RJ:
153
+	case SFF8024_CONNECTOR_MU:
154
+	case SFF8024_CONNECTOR_OPTICAL_PIGTAIL:
155
+	case SFF8024_CONNECTOR_MPO_1X12:
156
+	case SFF8024_CONNECTOR_MPO_2X16:
132157 		port = PORT_FIBRE;
133158 		break;
134159 
135
-	case SFP_CONNECTOR_RJ45:
160
+	case SFF8024_CONNECTOR_RJ45:
136161 		port = PORT_TP;
137162 		break;
138163 
139
-	case SFP_CONNECTOR_COPPER_PIGTAIL:
164
+	case SFF8024_CONNECTOR_COPPER_PIGTAIL:
140165 		port = PORT_DA;
141166 		break;
142167 
143
-	case SFP_CONNECTOR_UNSPEC:
168
+	case SFF8024_CONNECTOR_UNSPEC:
144169 		if (id->base.e1000_base_t) {
145170 			port = PORT_TP;
146171 			break;
147172 		}
148
-		/* fallthrough */
149
-	case SFP_CONNECTOR_SG: /* guess */
150
-	case SFP_CONNECTOR_MPO_1X12:
151
-	case SFP_CONNECTOR_MPO_2X16:
152
-	case SFP_CONNECTOR_HSSDC_II:
153
-	case SFP_CONNECTOR_NOSEPARATE:
154
-	case SFP_CONNECTOR_MXC_2X16:
173
+		fallthrough;
174
+	case SFF8024_CONNECTOR_SG: /* guess */
175
+	case SFF8024_CONNECTOR_HSSDC_II:
176
+	case SFF8024_CONNECTOR_NOSEPARATE:
177
+	case SFF8024_CONNECTOR_MXC_2X16:
155178 		port = PORT_OTHER;
156179 		break;
157180 	default:
....@@ -176,6 +199,33 @@
176199 	return port;
177200 }
178201 EXPORT_SYMBOL_GPL(sfp_parse_port);
202
+
203
+/**
204
+ * sfp_may_have_phy() - indicate whether the module may have a PHY
205
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
206
+ * @id: a pointer to the module's &struct sfp_eeprom_id
207
+ *
208
+ * Parse the EEPROM identification given in @id, and return whether
209
+ * this module may have a PHY.
210
+ */
211
+bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
212
+{
213
+	if (id->base.e1000_base_t)
214
+		return true;
215
+
216
+	if (id->base.phys_id != SFF8024_ID_DWDM_SFP) {
217
+		switch (id->base.extended_cc) {
218
+		case SFF8024_ECC_10GBASE_T_SFI:
219
+		case SFF8024_ECC_10GBASE_T_SR:
220
+		case SFF8024_ECC_5GBASE_T:
221
+		case SFF8024_ECC_2_5GBASE_T:
222
+			return true;
223
+		}
224
+	}
225
+
226
+	return false;
227
+}
228
+EXPORT_SYMBOL_GPL(sfp_may_have_phy);
179229 
180230 /**
181231  * sfp_parse_support() - Parse the eeprom id for supported link modes
....@@ -260,21 +310,32 @@
260310 	}
261311 
262312 	switch (id->base.extended_cc) {
263
-	case 0x00: /* Unspecified */
313
+	case SFF8024_ECC_UNSPEC:
264314 		break;
265
-	case 0x02: /* 100Gbase-SR4 or 25Gbase-SR */
315
+	case SFF8024_ECC_100GBASE_SR4_25GBASE_SR:
266316 		phylink_set(modes, 100000baseSR4_Full);
267317 		phylink_set(modes, 25000baseSR_Full);
268318 		break;
269
-	case 0x03: /* 100Gbase-LR4 or 25Gbase-LR */
270
-	case 0x04: /* 100Gbase-ER4 or 25Gbase-ER */
319
+	case SFF8024_ECC_100GBASE_LR4_25GBASE_LR:
320
+	case SFF8024_ECC_100GBASE_ER4_25GBASE_ER:
271321 		phylink_set(modes, 100000baseLR4_ER4_Full);
272322 		break;
273
-	case 0x0b: /* 100Gbase-CR4 or 25Gbase-CR CA-L */
274
-	case 0x0c: /* 25Gbase-CR CA-S */
275
-	case 0x0d: /* 25Gbase-CR CA-N */
323
+	case SFF8024_ECC_100GBASE_CR4:
276324 		phylink_set(modes, 100000baseCR4_Full);
325
+		fallthrough;
326
+	case SFF8024_ECC_25GBASE_CR_S:
327
+	case SFF8024_ECC_25GBASE_CR_N:
277328 		phylink_set(modes, 25000baseCR_Full);
329
+		break;
330
+	case SFF8024_ECC_10GBASE_T_SFI:
331
+	case SFF8024_ECC_10GBASE_T_SR:
332
+		phylink_set(modes, 10000baseT_Full);
333
+		break;
334
+	case SFF8024_ECC_5GBASE_T:
335
+		phylink_set(modes, 5000baseT_Full);
336
+		break;
337
+	case SFF8024_ECC_2_5GBASE_T:
338
+		phylink_set(modes, 2500baseT_Full);
278339 		break;
279340 	default:
280341 		dev_warn(bus->sfp_dev,
....@@ -294,14 +355,13 @@
294355 	}
295356 
296357 	/* If we haven't discovered any modes that this module supports, try
297
-	 * the encoding and bitrate to determine supported modes. Some BiDi
298
-	 * modules (eg, 1310nm/1550nm) are not 1000BASE-BX compliant due to
299
-	 * the differing wavelengths, so do not set any transceiver bits.
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.
300361 	 */
301362 	if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS)) {
302
-		/* If the encoding and bit rate allows 1000baseX */
303
-		if (id->base.encoding == SFP_ENCODING_8B10B && br_nom &&
304
-		    br_min <= 1300 && br_max >= 1200)
363
+		/* If the bit rate allows 1000baseX */
364
+		if (br_nom && br_min <= 1300 && br_max >= 1200)
305365 			phylink_set(modes, 1000baseX_Full);
306366 	}
307367 
....@@ -319,31 +379,27 @@
319379 /**
320380  * sfp_select_interface() - Select appropriate phy_interface_t mode
321381  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
322
- * @id: a pointer to the module's &struct sfp_eeprom_id
323382  * @link_modes: ethtool link modes mask
324383  *
325
- * Derive the phy_interface_t mode for the information found in the
326
- * module's identifying EEPROM and the link modes mask. There is no
327
- * standard or defined way to derive this information, so we decide
328
- * based upon the link mode mask.
384
+ * Derive the phy_interface_t mode for the SFP module from the link
385
+ * modes mask.
329386  */
330387 phy_interface_t sfp_select_interface(struct sfp_bus *bus,
331
-				     const struct sfp_eeprom_id *id,
332388 				     unsigned long *link_modes)
333389 {
334390 	if (phylink_test(link_modes, 10000baseCR_Full) ||
335391 	    phylink_test(link_modes, 10000baseSR_Full) ||
336392 	    phylink_test(link_modes, 10000baseLR_Full) ||
337393 	    phylink_test(link_modes, 10000baseLRM_Full) ||
338
-	    phylink_test(link_modes, 10000baseER_Full))
339
-		return PHY_INTERFACE_MODE_10GKR;
394
+	    phylink_test(link_modes, 10000baseER_Full) ||
395
+	    phylink_test(link_modes, 10000baseT_Full))
396
+		return PHY_INTERFACE_MODE_10GBASER;
340397 
341398 	if (phylink_test(link_modes, 2500baseX_Full))
342399 		return PHY_INTERFACE_MODE_2500BASEX;
343400 
344
-	if (id->base.e1000_base_t ||
345
-	    id->base.e100_base_lx ||
346
-	    id->base.e100_base_fx)
401
+	if (phylink_test(link_modes, 1000baseT_Half) ||
402
+	    phylink_test(link_modes, 1000baseT_Full))
347403 		return PHY_INTERFACE_MODE_SGMII;
348404 
349405 	if (phylink_test(link_modes, 1000baseX_Full))
....@@ -403,10 +459,19 @@
403459 	kfree(bus);
404460 }
405461 
406
-static void sfp_bus_put(struct sfp_bus *bus)
462
+/**
463
+ * sfp_bus_put() - put a reference on the &struct sfp_bus
464
+ * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
465
+ *
466
+ * Put a reference on the &struct sfp_bus and free the underlying structure
467
+ * if this was the last reference.
468
+ */
469
+void sfp_bus_put(struct sfp_bus *bus)
407470 {
408
-	kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
471
+	if (bus)
472
+		kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
409473 }
474
+EXPORT_SYMBOL_GPL(sfp_bus_put);
410475 
411476 static int sfp_register_bus(struct sfp_bus *bus)
412477 {
....@@ -422,11 +487,11 @@
422487 				return ret;
423488 		}
424489 	}
490
+	bus->registered = true;
425491 	bus->socket_ops->attach(bus->sfp);
426492 	if (bus->started)
427493 		bus->socket_ops->start(bus->sfp);
428
-	bus->netdev->sfp_bus = bus;
429
-	bus->registered = true;
494
+	bus->upstream_ops->attach(bus->upstream, bus);
430495 	return 0;
431496 }
432497 
....@@ -434,8 +499,8 @@
434499 {
435500 	const struct sfp_upstream_ops *ops = bus->upstream_ops;
436501 
437
-	bus->netdev->sfp_bus = NULL;
438502 	if (bus->registered) {
503
+		bus->upstream_ops->detach(bus->upstream, bus);
439504 		if (bus->started)
440505 			bus->socket_ops->stop(bus->sfp);
441506 		bus->socket_ops->detach(bus->sfp);
....@@ -517,70 +582,123 @@
517582 {
518583 	bus->upstream_ops = NULL;
519584 	bus->upstream = NULL;
520
-	bus->netdev = NULL;
521585 }
522586 
523587 /**
524
- * sfp_register_upstream() - Register the neighbouring device
525
- * @fwnode: firmware node for the SFP bus
526
- * @ndev: network device associated with the interface
527
- * @upstream: the upstream private data
528
- * @ops: the upstream's &struct sfp_upstream_ops
588
+ * sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode
589
+ * @fwnode: firmware node for the parent device (MAC or PHY)
529590  *
530
- * Register the upstream device (eg, PHY) with the SFP bus. MAC drivers
531
- * should use phylink, which will call this function for them. Returns
532
- * a pointer to the allocated &struct sfp_bus.
591
+ * Parse the parent device's firmware node for a SFP bus, and locate
592
+ * the sfp_bus structure, incrementing its reference count.  This must
593
+ * be put via sfp_bus_put() when done.
533594  *
534
- * On error, returns %NULL.
595
+ * Returns:
596
+ * 	    - on success, a pointer to the sfp_bus structure,
597
+ *	    - %NULL if no SFP is specified,
598
+ * 	    - on failure, an error pointer value:
599
+ *
600
+ * 	      - corresponding to the errors detailed for
601
+ * 	        fwnode_property_get_reference_args().
602
+ * 	      - %-ENOMEM if we failed to allocate the bus.
603
+ *	      - an error from the upstream's connect_phy() method.
535604  */
536
-struct sfp_bus *sfp_register_upstream(struct fwnode_handle *fwnode,
537
-				      struct net_device *ndev, void *upstream,
538
-				      const struct sfp_upstream_ops *ops)
605
+struct sfp_bus *sfp_bus_find_fwnode(struct fwnode_handle *fwnode)
539606 {
540
-	struct sfp_bus *bus = sfp_bus_get(fwnode);
541
-	int ret = 0;
607
+	struct fwnode_reference_args ref;
608
+	struct sfp_bus *bus;
609
+	int ret;
542610 
543
-	if (bus) {
544
-		rtnl_lock();
545
-		bus->upstream_ops = ops;
546
-		bus->upstream = upstream;
547
-		bus->netdev = ndev;
611
+	ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL,
612
+						 0, 0, &ref);
613
+	if (ret == -ENOENT)
614
+		return NULL;
615
+	else if (ret < 0)
616
+		return ERR_PTR(ret);
548617 
549
-		if (bus->sfp) {
550
-			ret = sfp_register_bus(bus);
551
-			if (ret)
552
-				sfp_upstream_clear(bus);
553
-		}
554
-		rtnl_unlock();
618
+	if (!fwnode_device_is_available(ref.fwnode)) {
619
+		fwnode_handle_put(ref.fwnode);
620
+		return NULL;
555621 	}
556622 
557
-	if (ret) {
558
-		sfp_bus_put(bus);
559
-		bus = NULL;
560
-	}
623
+	bus = sfp_bus_get(ref.fwnode);
624
+	fwnode_handle_put(ref.fwnode);
625
+	if (!bus)
626
+		return ERR_PTR(-ENOMEM);
561627 
562628 	return bus;
563629 }
564
-EXPORT_SYMBOL_GPL(sfp_register_upstream);
630
+EXPORT_SYMBOL_GPL(sfp_bus_find_fwnode);
565631 
566632 /**
567
- * sfp_unregister_upstream() - Unregister sfp bus
568
- * @bus: a pointer to the &struct sfp_bus structure for the sfp module
633
+ * sfp_bus_add_upstream() - parse and register the neighbouring device
634
+ * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode()
635
+ * @upstream: the upstream private data
636
+ * @ops: the upstream's &struct sfp_upstream_ops
569637  *
570
- * Unregister a previously registered upstream connection for the SFP
571
- * module. @bus is returned from sfp_register_upstream().
638
+ * Add upstream driver for the SFP bus, and if the bus is complete, register
639
+ * the SFP bus using sfp_register_upstream().  This takes a reference on the
640
+ * bus, so it is safe to put the bus after this call.
641
+ *
642
+ * Returns:
643
+ * 	    - on success, a pointer to the sfp_bus structure,
644
+ *	    - %NULL if no SFP is specified,
645
+ * 	    - on failure, an error pointer value:
646
+ *
647
+ * 	      - corresponding to the errors detailed for
648
+ * 	        fwnode_property_get_reference_args().
649
+ * 	      - %-ENOMEM if we failed to allocate the bus.
650
+ *	      - an error from the upstream's connect_phy() method.
572651  */
573
-void sfp_unregister_upstream(struct sfp_bus *bus)
652
+int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
653
+			 const struct sfp_upstream_ops *ops)
574654 {
655
+	int ret;
656
+
657
+	/* If no bus, return success */
658
+	if (!bus)
659
+		return 0;
660
+
575661 	rtnl_lock();
576
-	if (bus->sfp)
577
-		sfp_unregister_bus(bus);
578
-	sfp_upstream_clear(bus);
662
+	kref_get(&bus->kref);
663
+	bus->upstream_ops = ops;
664
+	bus->upstream = upstream;
665
+
666
+	if (bus->sfp) {
667
+		ret = sfp_register_bus(bus);
668
+		if (ret)
669
+			sfp_upstream_clear(bus);
670
+	} else {
671
+		ret = 0;
672
+	}
579673 	rtnl_unlock();
580674 
581
-	sfp_bus_put(bus);
675
+	if (ret)
676
+		sfp_bus_put(bus);
677
+
678
+	return ret;
582679 }
583
-EXPORT_SYMBOL_GPL(sfp_unregister_upstream);
680
+EXPORT_SYMBOL_GPL(sfp_bus_add_upstream);
681
+
682
+/**
683
+ * sfp_bus_del_upstream() - Delete a sfp bus
684
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
685
+ *
686
+ * Delete a previously registered upstream connection for the SFP
687
+ * module. @bus should have been added by sfp_bus_add_upstream().
688
+ */
689
+void sfp_bus_del_upstream(struct sfp_bus *bus)
690
+{
691
+	if (bus) {
692
+		rtnl_lock();
693
+		if (bus->sfp)
694
+			sfp_unregister_bus(bus);
695
+		sfp_upstream_clear(bus);
696
+		rtnl_unlock();
697
+
698
+		sfp_bus_put(bus);
699
+	}
700
+}
701
+EXPORT_SYMBOL_GPL(sfp_bus_del_upstream);
584702 
585703 /* Socket driver entry points */
586704 int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)
....@@ -651,6 +769,27 @@
651769 }
652770 EXPORT_SYMBOL_GPL(sfp_module_remove);
653771 
772
+int sfp_module_start(struct sfp_bus *bus)
773
+{
774
+	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
775
+	int ret = 0;
776
+
777
+	if (ops && ops->module_start)
778
+		ret = ops->module_start(bus->upstream);
779
+
780
+	return ret;
781
+}
782
+EXPORT_SYMBOL_GPL(sfp_module_start);
783
+
784
+void sfp_module_stop(struct sfp_bus *bus)
785
+{
786
+	const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
787
+
788
+	if (ops && ops->module_stop)
789
+		ops->module_stop(bus->upstream);
790
+}
791
+EXPORT_SYMBOL_GPL(sfp_module_stop);
792
+
654793 static void sfp_socket_clear(struct sfp_bus *bus)
655794 {
656795 	bus->sfp_dev = NULL;
....@@ -670,7 +809,7 @@
670809 		bus->sfp = sfp;
671810 		bus->socket_ops = ops;
672811 
673
-		if (bus->netdev) {
812
+		if (bus->upstream_ops) {
674813 			ret = sfp_register_bus(bus);
675814 			if (ret)
676815 				sfp_socket_clear(bus);
....@@ -690,7 +829,7 @@
690829 void sfp_unregister_socket(struct sfp_bus *bus)
691830 {
692831 	rtnl_lock();
693
-	if (bus->netdev)
832
+	if (bus->upstream_ops)
694833 		sfp_unregister_bus(bus);
695834 	sfp_socket_clear(bus);
696835 	rtnl_unlock();