summaryrefslogtreecommitdiff
path: root/drivers/net/phy/phy.c
blob: 8eeb26d8aeb7ddac1f81a73b3af02e25d8c909c7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
// SPDX-License-Identifier: GPL-2.0+
/* Framework for configuring and reading PHY devices
 * Based on code in sungem_phy.c and gianfar_phy.c
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 * Copyright (c) 2006, 2007  Maciej W. Rozycki
 */

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/ethtool_netlink.h>
#include <linux/phy.h>
#include <linux/phy_led_triggers.h>
#include <linux/sfp.h>
#include <linux/workqueue.h>
#include <linux/mdio.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/sock.h>

#define PHY_STATE_TIME	HZ

#define PHY_STATE_STR(_state)			\
	case PHY_##_state:			\
		return __stringify(_state);	\

static const char *phy_state_to_str(enum phy_state st)
{
	switch (st) {
	PHY_STATE_STR(DOWN)
	PHY_STATE_STR(READY)
	PHY_STATE_STR(UP)
	PHY_STATE_STR(RUNNING)
	PHY_STATE_STR(NOLINK)
	PHY_STATE_STR(CABLETEST)
	PHY_STATE_STR(HALTED)
	}

	return NULL;
}

static void phy_link_up(struct phy_device *phydev)
{
	phydev->phy_link_change(phydev, true);
	phy_led_trigger_change_speed(phydev);
}

static void phy_link_down(struct phy_device *phydev)
{
	phydev->phy_link_change(phydev, false);
	phy_led_trigger_change_speed(phydev);
}

static const char *phy_pause_str(struct phy_device *phydev)
{
	bool local_pause, local_asym_pause;

	if (phydev->autoneg == AUTONEG_DISABLE)
		goto no_pause;

	local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
					phydev->advertising);
	local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
					     phydev->advertising);

	if (local_pause && phydev->pause)
		return "rx/tx";

	if (local_asym_pause && phydev->asym_pause) {
		if (local_pause)
			return "rx";
		if (phydev->pause)
			return "tx";
	}

no_pause:
	return "off";
}

/**
 * phy_print_status - Convenience function to print out the current phy status
 * @phydev: the phy_device struct
 */
void phy_print_status(struct phy_device *phydev)
{
	if (phydev->link) {
		netdev_info(phydev->attached_dev,
			"Link is Up - %s/%s %s- flow control %s\n",
			phy_speed_to_str(phydev->speed),
			phy_duplex_to_str(phydev->duplex),
			phydev->downshifted_rate ? "(downshifted) " : "",
			phy_pause_str(phydev));
	} else	{
		netdev_info(phydev->attached_dev, "Link is Down\n");
	}
}
EXPORT_SYMBOL(phy_print_status);

/**
 * phy_config_interrupt - configure the PHY device for the requested interrupts
 * @phydev: the phy_device struct
 * @interrupts: interrupt flags to configure for this @phydev
 *
 * Returns 0 on success or < 0 on error.
 */
static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
{
	phydev->interrupts = interrupts ? 1 : 0;
	if (phydev->drv->config_intr)
		return phydev->drv->config_intr(phydev);

	return 0;
}

/**
 * phy_restart_aneg - restart auto-negotiation
 * @phydev: target phy_device struct
 *
 * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
 * negative errno on error.
 */
int phy_restart_aneg(struct phy_device *phydev)
{
	int ret;

	if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
		ret = genphy_c45_restart_aneg(phydev);
	else
		ret = genphy_restart_aneg(phydev);

	return ret;
}
EXPORT_SYMBOL_GPL(phy_restart_aneg);

/**
 * phy_aneg_done - return auto-negotiation status
 * @phydev: target phy_device struct
 *
 * Description: Return the auto-negotiation status from this @phydev
 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 * is still pending.
 */
int phy_aneg_done(struct phy_device *phydev)
{
	if (phydev->drv && phydev->drv->aneg_done)
		return phydev->drv->aneg_done(phydev);
	else if (phydev->is_c45)
		return genphy_c45_aneg_done(phydev);
	else
		return genphy_aneg_done(phydev);
}
EXPORT_SYMBOL(phy_aneg_done);

/**
 * phy_find_valid - find a PHY setting that matches the requested parameters
 * @speed: desired speed
 * @duplex: desired duplex
 * @supported: mask of supported link modes
 *
 * Locate a supported phy setting that is, in priority order:
 * - an exact match for the specified speed and duplex mode
 * - a match for the specified speed, or slower speed
 * - the slowest supported speed
 * Returns the matched phy_setting entry, or %NULL if no supported phy
 * settings were found.
 */
static const struct phy_setting *
phy_find_valid(int speed, int duplex, unsigned long *supported)
{
	return phy_lookup_setting(speed, duplex, supported, false);
}

/**
 * phy_supported_speeds - return all speeds currently supported by a phy device
 * @phy: The phy device to return supported speeds of.
 * @speeds: buffer to store supported speeds in.
 * @size:   size of speeds buffer.
 *
 * Description: Returns the number of supported speeds, and fills the speeds
 * buffer with the supported speeds. If speeds buffer is too small to contain
 * all currently supported speeds, will return as many speeds as can fit.
 */
unsigned int phy_supported_speeds(struct phy_device *phy,
				  unsigned int *speeds,
				  unsigned int size)
{
	return phy_speeds(speeds, size, phy->supported);
}

/**
 * phy_check_valid - check if there is a valid PHY setting which matches
 *		     speed, duplex, and feature mask
 * @speed: speed to match
 * @duplex: duplex to match
 * @features: A mask of the valid settings
 *
 * Description: Returns true if there is a valid setting, false otherwise.
 */
static inline bool phy_check_valid(int speed, int duplex,
				   unsigned long *features)
{
	return !!phy_lookup_setting(speed, duplex, features, true);
}

/**
 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 * @phydev: the target phy_device struct
 *
 * Description: Make sure the PHY is set to supported speeds and
 *   duplexes.  Drop down by one in this order:  1000/FULL,
 *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 */
static void phy_sanitize_settings(struct phy_device *phydev)
{
	const struct phy_setting *setting;

	setting = phy_find_valid(phydev->speed, phydev->duplex,
				 phydev->supported);
	if (setting) {
		phydev->speed = setting->speed;
		phydev->duplex = setting->duplex;
	} else {
		/* We failed to find anything (no supported speeds?) */
		phydev->speed = SPEED_UNKNOWN;
		phydev->duplex = DUPLEX_UNKNOWN;
	}
}

int phy_ethtool_ksettings_set(struct phy_device *phydev,
			      const struct ethtool_link_ksettings *cmd)
{
	__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
	u8 autoneg = cmd->base.autoneg;
	u8 duplex = cmd->base.duplex;
	u32 speed = cmd->base.speed;

	if (cmd->base.phy_address != phydev->mdio.addr)
		return -EINVAL;

	linkmode_copy(advertising, cmd->link_modes.advertising);

	/* We make sure that we don't pass unsupported values in to the PHY */
	linkmode_and(advertising, advertising, phydev->supported);

	/* Verify the settings we care about. */
	if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
		return -EINVAL;

	if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
		return -EINVAL;

	if (autoneg == AUTONEG_DISABLE &&
	    ((speed != SPEED_1000 &&
	      speed != SPEED_100 &&
	      speed != SPEED_10) ||
	     (duplex != DUPLEX_HALF &&
	      duplex != DUPLEX_FULL)))
		return -EINVAL;

	phydev->autoneg = autoneg;

	if (autoneg == AUTONEG_DISABLE) {
		phydev->speed = speed;
		phydev->duplex = duplex;
	}

	linkmode_copy(phydev->advertising, advertising);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
			 phydev->advertising, autoneg == AUTONEG_ENABLE);

	phydev->master_slave_set = cmd->base.master_slave_cfg;
	phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;

	/* Restart the PHY */
	phy_start_aneg(phydev);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_ksettings_set);

void phy_ethtool_ksettings_get(struct phy_device *phydev,
			       struct ethtool_link_ksettings *cmd)
{
	linkmode_copy(cmd->link_modes.supported, phydev->supported);
	linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
	linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);

	cmd->base.speed = phydev->speed;
	cmd->base.duplex = phydev->duplex;
	cmd->base.master_slave_cfg = phydev->master_slave_get;
	cmd->base.master_slave_state = phydev->master_slave_state;
	if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
		cmd->base.port = PORT_BNC;
	else
		cmd->base.port = phydev->port;
	cmd->base.transceiver = phy_is_internal(phydev) ?
				XCVR_INTERNAL : XCVR_EXTERNAL;
	cmd->base.phy_address = phydev->mdio.addr;
	cmd->base.autoneg = phydev->autoneg;
	cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
	cmd->base.eth_tp_mdix = phydev->mdix;
}
EXPORT_SYMBOL(phy_ethtool_ksettings_get);

/**
 * phy_mii_ioctl - generic PHY MII ioctl interface
 * @phydev: the phy_device struct
 * @ifr: &struct ifreq for socket ioctl's
 * @cmd: ioctl cmd to execute
 *
 * Note that this function is currently incompatible with the
 * PHYCONTROL layer.  It changes registers without regard to
 * current state.  Use at own risk.
 */
int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
{
	struct mii_ioctl_data *mii_data = if_mii(ifr);
	u16 val = mii_data->val_in;
	bool change_autoneg = false;
	int prtad, devad;

	switch (cmd) {
	case SIOCGMIIPHY:
		mii_data->phy_id = phydev->mdio.addr;
		fallthrough;

	case SIOCGMIIREG:
		if (mdio_phy_id_is_c45(mii_data->phy_id)) {
			prtad = mdio_phy_id_prtad(mii_data->phy_id);
			devad = mdio_phy_id_devad(mii_data->phy_id);
			devad = mdiobus_c45_addr(devad, mii_data->reg_num);
		} else {
			prtad = mii_data->phy_id;
			devad = mii_data->reg_num;
		}
		mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
						 devad);
		return 0;

	case SIOCSMIIREG:
		if (mdio_phy_id_is_c45(mii_data->phy_id)) {
			prtad = mdio_phy_id_prtad(mii_data->phy_id);
			devad = mdio_phy_id_devad(mii_data->phy_id);
			devad = mdiobus_c45_addr(devad, mii_data->reg_num);
		} else {
			prtad = mii_data->phy_id;
			devad = mii_data->reg_num;
		}
		if (prtad == phydev->mdio.addr) {
			switch (devad) {
			case MII_BMCR:
				if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
					if (phydev->autoneg == AUTONEG_ENABLE)
						change_autoneg = true;
					phydev->autoneg = AUTONEG_DISABLE;
					if (val & BMCR_FULLDPLX)
						phydev->duplex = DUPLEX_FULL;
					else
						phydev->duplex = DUPLEX_HALF;
					if (val & BMCR_SPEED1000)
						phydev->speed = SPEED_1000;
					else if (val & BMCR_SPEED100)
						phydev->speed = SPEED_100;
					else phydev->speed = SPEED_10;
				} else {
					if (phydev->autoneg == AUTONEG_DISABLE)
						change_autoneg = true;
					phydev->autoneg = AUTONEG_ENABLE;
				}
				break;
			case MII_ADVERTISE:
				mii_adv_mod_linkmode_adv_t(phydev->advertising,
							   val);
				change_autoneg = true;
				break;
			case MII_CTRL1000:
				mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
							        val);
				change_autoneg = true;
				break;
			default:
				/* do nothing */
				break;
			}
		}

		mdiobus_write(phydev->mdio.bus, prtad, devad, val);

		if (prtad == phydev->mdio.addr &&
		    devad == MII_BMCR &&
		    val & BMCR_RESET)
			return phy_init_hw(phydev);

		if (change_autoneg)
			return phy_start_aneg(phydev);

		return 0;

	case SIOCSHWTSTAMP:
		if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
			return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
		fallthrough;

	default:
		return -EOPNOTSUPP;
	}
}
EXPORT_SYMBOL(phy_mii_ioctl);

/**
 * phy_do_ioctl - generic ndo_do_ioctl implementation
 * @dev: the net_device struct
 * @ifr: &struct ifreq for socket ioctl's
 * @cmd: ioctl cmd to execute
 */
int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	if (!dev->phydev)
		return -ENODEV;

	return phy_mii_ioctl(dev->phydev, ifr, cmd);
}
EXPORT_SYMBOL(phy_do_ioctl);

/**
 * phy_do_ioctl_running - generic ndo_do_ioctl implementation but test first
 *
 * @dev: the net_device struct
 * @ifr: &struct ifreq for socket ioctl's
 * @cmd: ioctl cmd to execute
 *
 * Same as phy_do_ioctl, but ensures that net_device is running before
 * handling the ioctl.
 */
int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	if (!netif_running(dev))
		return -ENODEV;

	return phy_do_ioctl(dev, ifr, cmd);
}
EXPORT_SYMBOL(phy_do_ioctl_running);

/**
 * phy_queue_state_machine - Trigger the state machine to run soon
 *
 * @phydev: the phy_device struct
 * @jiffies: Run the state machine after these jiffies
 */
void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
{
	mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
			 jiffies);
}
EXPORT_SYMBOL(phy_queue_state_machine);

/**
 * phy_trigger_machine - Trigger the state machine to run now
 *
 * @phydev: the phy_device struct
 */
void phy_trigger_machine(struct phy_device *phydev)
{
	phy_queue_state_machine(phydev, 0);
}
EXPORT_SYMBOL(phy_trigger_machine);

static void phy_abort_cable_test(struct phy_device *phydev)
{
	int err;

	ethnl_cable_test_finished(phydev);

	err = phy_init_hw(phydev);
	if (err)
		phydev_err(phydev, "Error while aborting cable test");
}

/**
 * phy_ethtool_get_strings - Get the statistic counter names
 *
 * @phydev: the phy_device struct
 * @data: Where to put the strings
 */
int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
{
	if (!phydev->drv)
		return -EIO;

	mutex_lock(&phydev->lock);
	phydev->drv->get_strings(phydev, data);
	mutex_unlock(&phydev->lock);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_strings);

/**
 * phy_ethtool_get_sset_count - Get the number of statistic counters
 *
 * @phydev: the phy_device struct
 */
int phy_ethtool_get_sset_count(struct phy_device *phydev)
{
	int ret;

	if (!phydev->drv)
		return -EIO;

	if (phydev->drv->get_sset_count &&
	    phydev->drv->get_strings &&
	    phydev->drv->get_stats) {
		mutex_lock(&phydev->lock);
		ret = phydev->drv->get_sset_count(phydev);
		mutex_unlock(&phydev->lock);

		return ret;
	}

	return -EOPNOTSUPP;
}
EXPORT_SYMBOL(phy_ethtool_get_sset_count);

/**
 * phy_ethtool_get_stats - Get the statistic counters
 *
 * @phydev: the phy_device struct
 * @stats: What counters to get
 * @data: Where to store the counters
 */
int phy_ethtool_get_stats(struct phy_device *phydev,
			  struct ethtool_stats *stats, u64 *data)
{
	if (!phydev->drv)
		return -EIO;

	mutex_lock(&phydev->lock);
	phydev->drv->get_stats(phydev, stats, data);
	mutex_unlock(&phydev->lock);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_stats);

/**
 * phy_start_cable_test - Start a cable test
 *
 * @phydev: the phy_device struct
 * @extack: extack for reporting useful error messages
 */
int phy_start_cable_test(struct phy_device *phydev,
			 struct netlink_ext_ack *extack)
{
	struct net_device *dev = phydev->attached_dev;
	int err = -ENOMEM;

	if (!(phydev->drv &&
	      phydev->drv->cable_test_start &&
	      phydev->drv->cable_test_get_status)) {
		NL_SET_ERR_MSG(extack,
			       "PHY driver does not support cable testing");
		return -EOPNOTSUPP;
	}

	mutex_lock(&phydev->lock);
	if (phydev->state == PHY_CABLETEST) {
		NL_SET_ERR_MSG(extack,
			       "PHY already performing a test");
		err = -EBUSY;
		goto out;
	}

	if (phydev->state < PHY_UP ||
	    phydev->state > PHY_CABLETEST) {
		NL_SET_ERR_MSG(extack,
			       "PHY not configured. Try setting interface up");
		err = -EBUSY;
		goto out;
	}

	err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
	if (err)
		goto out;

	/* Mark the carrier down until the test is complete */
	phy_link_down(phydev);

	netif_testing_on(dev);
	err = phydev->drv->cable_test_start(phydev);
	if (err) {
		netif_testing_off(dev);
		phy_link_up(phydev);
		goto out_free;
	}

	phydev->state = PHY_CABLETEST;

	if (phy_polling_mode(phydev))
		phy_trigger_machine(phydev);

	mutex_unlock(&phydev->lock);

	return 0;

out_free:
	ethnl_cable_test_free(phydev);
out:
	mutex_unlock(&phydev->lock);

	return err;
}
EXPORT_SYMBOL(phy_start_cable_test);

/**
 * phy_start_cable_test_tdr - Start a raw TDR cable test
 *
 * @phydev: the phy_device struct
 * @extack: extack for reporting useful error messages
 * @config: Configuration of the test to run
 */
int phy_start_cable_test_tdr(struct phy_device *phydev,
			     struct netlink_ext_ack *extack,
			     const struct phy_tdr_config *config)
{
	struct net_device *dev = phydev->attached_dev;
	int err = -ENOMEM;

	if (!(phydev->drv &&
	      phydev->drv->cable_test_tdr_start &&
	      phydev->drv->cable_test_get_status)) {
		NL_SET_ERR_MSG(extack,
			       "PHY driver does not support cable test TDR");
		return -EOPNOTSUPP;
	}

	mutex_lock(&phydev->lock);
	if (phydev->state == PHY_CABLETEST) {
		NL_SET_ERR_MSG(extack,
			       "PHY already performing a test");
		err = -EBUSY;
		goto out;
	}

	if (phydev->state < PHY_UP ||
	    phydev->state > PHY_CABLETEST) {
		NL_SET_ERR_MSG(extack,
			       "PHY not configured. Try setting interface up");
		err = -EBUSY;
		goto out;
	}

	err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
	if (err)
		goto out;

	/* Mark the carrier down until the test is complete */
	phy_link_down(phydev);

	netif_testing_on(dev);
	err = phydev->drv->cable_test_tdr_start(phydev, config);
	if (err) {
		netif_testing_off(dev);
		phy_link_up(phydev);
		goto out_free;
	}

	phydev->state = PHY_CABLETEST;

	if (phy_polling_mode(phydev))
		phy_trigger_machine(phydev);

	mutex_unlock(&phydev->lock);

	return 0;

out_free:
	ethnl_cable_test_free(phydev);
out:
	mutex_unlock(&phydev->lock);

	return err;
}
EXPORT_SYMBOL(phy_start_cable_test_tdr);

int phy_config_aneg(struct phy_device *phydev)
{
	if (phydev->drv->config_aneg)
		return phydev->drv->config_aneg(phydev);

	/* Clause 45 PHYs that don't implement Clause 22 registers are not
	 * allowed to call genphy_config_aneg()
	 */
	if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
		return genphy_c45_config_aneg(phydev);

	return genphy_config_aneg(phydev);
}
EXPORT_SYMBOL(phy_config_aneg);

/**
 * phy_check_link_status - check link status and set state accordingly
 * @phydev: the phy_device struct
 *
 * Description: Check for link and whether autoneg was triggered / is running
 * and set state accordingly
 */
static int phy_check_link_status(struct phy_device *phydev)
{
	int err;

	lockdep_assert_held(&phydev->lock);

	/* Keep previous state if loopback is enabled because some PHYs
	 * report that Link is Down when loopback is enabled.
	 */
	if (phydev->loopback_enabled)
		return 0;

	err = phy_read_status(phydev);
	if (err)
		return err;

	if (phydev->link && phydev->state != PHY_RUNNING) {
		phy_check_downshift(phydev);
		phydev->state = PHY_RUNNING;
		phy_link_up(phydev);
	} else if (!phydev->link && phydev->state != PHY_NOLINK) {
		phydev->state = PHY_NOLINK;
		phy_link_down(phydev);
	}

	return 0;
}

/**
 * phy_start_aneg - start auto-negotiation for this PHY device
 * @phydev: the phy_device struct
 *
 * Description: Sanitizes the settings (if we're not autonegotiating
 *   them), and then calls the driver's config_aneg function.
 *   If the PHYCONTROL Layer is operating, we change the state to
 *   reflect the beginning of Auto-negotiation or forcing.
 */
int phy_start_aneg(struct phy_device *phydev)
{
	int err;

	if (!phydev->drv)
		return -EIO;

	mutex_lock(&phydev->lock);

	if (AUTONEG_DISABLE == phydev->autoneg)
		phy_sanitize_settings(phydev);

	err = phy_config_aneg(phydev);
	if (err < 0)
		goto out_unlock;

	if (phy_is_started(phydev))
		err = phy_check_link_status(phydev);
out_unlock:
	mutex_unlock(&phydev->lock);

	return err;
}
EXPORT_SYMBOL(phy_start_aneg);

static int phy_poll_aneg_done(struct phy_device *phydev)
{
	unsigned int retries = 100;
	int ret;

	do {
		msleep(100);
		ret = phy_aneg_done(phydev);
	} while (!ret && --retries);

	if (!ret)
		return -ETIMEDOUT;

	return ret < 0 ? ret : 0;
}

/**
 * phy_speed_down - set speed to lowest speed supported by both link partners
 * @phydev: the phy_device struct
 * @sync: perform action synchronously
 *
 * Description: Typically used to save energy when waiting for a WoL packet
 *
 * WARNING: Setting sync to false may cause the system being unable to suspend
 * in case the PHY generates an interrupt when finishing the autonegotiation.
 * This interrupt may wake up the system immediately after suspend.
 * Therefore use sync = false only if you're sure it's safe with the respective
 * network chip.
 */
int phy_speed_down(struct phy_device *phydev, bool sync)
{
	__ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
	int ret;

	if (phydev->autoneg != AUTONEG_ENABLE)
		return 0;

	linkmode_copy(adv_tmp, phydev->advertising);

	ret = phy_speed_down_core(phydev);
	if (ret)
		return ret;

	linkmode_copy(phydev->adv_old, adv_tmp);

	if (linkmode_equal(phydev->advertising, adv_tmp))
		return 0;

	ret = phy_config_aneg(phydev);
	if (ret)
		return ret;

	return sync ? phy_poll_aneg_done(phydev) : 0;
}
EXPORT_SYMBOL_GPL(phy_speed_down);

/**
 * phy_speed_up - (re)set advertised speeds to all supported speeds
 * @phydev: the phy_device struct
 *
 * Description: Used to revert the effect of phy_speed_down
 */
int phy_speed_up(struct phy_device *phydev)
{
	__ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);

	if (phydev->autoneg != AUTONEG_ENABLE)
		return 0;

	if (linkmode_empty(phydev->adv_old))
		return 0;

	linkmode_copy(adv_tmp, phydev->advertising);
	linkmode_copy(phydev->advertising, phydev->adv_old);
	linkmode_zero(phydev->adv_old);

	if (linkmode_equal(phydev->advertising, adv_tmp))
		return 0;

	return phy_config_aneg(phydev);
}
EXPORT_SYMBOL_GPL(phy_speed_up);

/**
 * phy_start_machine - start PHY state machine tracking
 * @phydev: the phy_device struct
 *
 * Description: The PHY infrastructure can run a state machine
 *   which tracks whether the PHY is starting up, negotiating,
 *   etc.  This function starts the delayed workqueue which tracks
 *   the state of the PHY. If you want to maintain your own state machine,
 *   do not call this function.
 */
void phy_start_machine(struct phy_device *phydev)
{
	phy_trigger_machine(phydev);
}
EXPORT_SYMBOL_GPL(phy_start_machine);

/**
 * phy_stop_machine - stop the PHY state machine tracking
 * @phydev: target phy_device struct
 *
 * Description: Stops the state machine delayed workqueue, sets the
 *   state to UP (unless it wasn't up yet). This function must be
 *   called BEFORE phy_detach.
 */
void phy_stop_machine(struct phy_device *phydev)
{
	cancel_delayed_work_sync(&phydev->state_queue);

	mutex_lock(&phydev->lock);
	if (phy_is_started(phydev))
		phydev->state = PHY_UP;
	mutex_unlock(&phydev->lock);
}

/**
 * phy_error - enter HALTED state for this PHY device
 * @phydev: target phy_device struct
 *
 * Moves the PHY to the HALTED state in response to a read
 * or write error, and tells the controller the link is down.
 * Must not be called from interrupt context, or while the
 * phydev->lock is held.
 */
void phy_error(struct phy_device *phydev)
{
	WARN_ON(1);

	mutex_lock(&phydev->lock);
	phydev->state = PHY_HALTED;
	mutex_unlock(&phydev->lock);

	phy_trigger_machine(phydev);
}
EXPORT_SYMBOL(phy_error);

/**
 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 * @phydev: target phy_device struct
 */
int phy_disable_interrupts(struct phy_device *phydev)
{
	/* Disable PHY interrupts */
	return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
}

/**
 * phy_interrupt - PHY interrupt handler
 * @irq: interrupt line
 * @phy_dat: phy_device pointer
 *
 * Description: Handle PHY interrupt
 */
static irqreturn_t phy_interrupt(int irq, void *phy_dat)
{
	struct phy_device *phydev = phy_dat;
	struct phy_driver *drv = phydev->drv;

	return drv->handle_interrupt(phydev);
}

/**
 * phy_enable_interrupts - Enable the interrupts from the PHY side
 * @phydev: target phy_device struct
 */
static int phy_enable_interrupts(struct phy_device *phydev)
{
	return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
}

/**
 * phy_request_interrupt - request and enable interrupt for a PHY device
 * @phydev: target phy_device struct
 *
 * Description: Request and enable the interrupt for the given PHY.
 *   If this fails, then we set irq to PHY_POLL.
 *   This should only be called with a valid IRQ number.
 */
void phy_request_interrupt(struct phy_device *phydev)
{
	int err;

	err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
				   IRQF_ONESHOT | IRQF_SHARED,
				   phydev_name(phydev), phydev);
	if (err) {
		phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
			    err, phydev->irq);
		phydev->irq = PHY_POLL;
	} else {
		if (phy_enable_interrupts(phydev)) {
			phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
			phy_free_interrupt(phydev);
			phydev->irq = PHY_POLL;
		}
	}
}
EXPORT_SYMBOL(phy_request_interrupt);

/**
 * phy_free_interrupt - disable and free interrupt for a PHY device
 * @phydev: target phy_device struct
 *
 * Description: Disable and free the interrupt for the given PHY.
 *   This should only be called with a valid IRQ number.
 */
void phy_free_interrupt(struct phy_device *phydev)
{
	phy_disable_interrupts(phydev);
	free_irq(phydev->irq, phydev);
}
EXPORT_SYMBOL(phy_free_interrupt);

/**
 * phy_stop - Bring down the PHY link, and stop checking the status
 * @phydev: target phy_device struct
 */
void phy_stop(struct phy_device *phydev)
{
	struct net_device *dev = phydev->attached_dev;

	if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
		WARN(1, "called from state %s\n",
		     phy_state_to_str(phydev->state));
		return;
	}

	mutex_lock(&phydev->lock);

	if (phydev->state == PHY_CABLETEST) {
		phy_abort_cable_test(phydev);
		netif_testing_off(dev);
	}

	if (phydev->sfp_bus)
		sfp_upstream_stop(phydev->sfp_bus);

	phydev->state = PHY_HALTED;

	mutex_unlock(&phydev->lock);

	phy_state_machine(&phydev->state_queue.work);
	phy_stop_machine(phydev);

	/* Cannot call flush_scheduled_work() here as desired because
	 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
	 * will not reenable interrupts.
	 */
}
EXPORT_SYMBOL(phy_stop);

/**
 * phy_start - start or restart a PHY device
 * @phydev: target phy_device struct
 *
 * Description: Indicates the attached device's readiness to
 *   handle PHY-related work.  Used during startup to start the
 *   PHY, and after a call to phy_stop() to resume operation.
 *   Also used to indicate the MDIO bus has cleared an error
 *   condition.
 */
void phy_start(struct phy_device *phydev)
{
	mutex_lock(&phydev->lock);

	if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
		WARN(1, "called from state %s\n",
		     phy_state_to_str(phydev->state));
		goto out;
	}

	if (phydev->sfp_bus)
		sfp_upstream_start(phydev->sfp_bus);

	/* if phy was suspended, bring the physical link up again */
	__phy_resume(phydev);

	phydev->state = PHY_UP;

	phy_start_machine(phydev);
out:
	mutex_unlock(&phydev->lock);
}
EXPORT_SYMBOL(phy_start);

/**
 * phy_state_machine - Handle the state machine
 * @work: work_struct that describes the work to be done
 */
void phy_state_machine(struct work_struct *work)
{
	struct delayed_work *dwork = to_delayed_work(work);
	struct phy_device *phydev =
			container_of(dwork, struct phy_device, state_queue);
	struct net_device *dev = phydev->attached_dev;
	bool needs_aneg = false, do_suspend = false;
	enum phy_state old_state;
	bool finished = false;
	int err = 0;

	mutex_lock(&phydev->lock);

	old_state = phydev->state;

	switch (phydev->state) {
	case PHY_DOWN:
	case PHY_READY:
		break;
	case PHY_UP:
		needs_aneg = true;

		break;
	case PHY_NOLINK:
	case PHY_RUNNING:
		err = phy_check_link_status(phydev);
		break;
	case PHY_CABLETEST:
		err = phydev->drv->cable_test_get_status(phydev, &finished);
		if (err) {
			phy_abort_cable_test(phydev);
			netif_testing_off(dev);
			needs_aneg = true;
			phydev->state = PHY_UP;
			break;
		}

		if (finished) {
			ethnl_cable_test_finished(phydev);
			netif_testing_off(dev);
			needs_aneg = true;
			phydev->state = PHY_UP;
		}
		break;
	case PHY_HALTED:
		if (phydev->link) {
			phydev->link = 0;
			phy_link_down(phydev);
		}
		do_suspend = true;
		break;
	}

	mutex_unlock(&phydev->lock);

	if (needs_aneg)
		err = phy_start_aneg(phydev);
	else if (do_suspend)
		phy_suspend(phydev);

	if (err == -ENODEV)
		return;

	if (err < 0)
		phy_error(phydev);

	if (old_state != phydev->state) {
		phydev_dbg(phydev, "PHY state change %s -> %s\n",
			   phy_state_to_str(old_state),
			   phy_state_to_str(phydev->state));
		if (phydev->drv && phydev->drv->link_change_notify)
			phydev->drv->link_change_notify(phydev);
	}

	/* Only re-schedule a PHY state machine change if we are polling the
	 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
	 * between states from phy_mac_interrupt().
	 *
	 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
	 * state machine would be pointless and possibly error prone when
	 * called from phy_disconnect() synchronously.
	 */
	mutex_lock(&phydev->lock);
	if (phy_polling_mode(phydev) && phy_is_started(phydev))
		phy_queue_state_machine(phydev, PHY_STATE_TIME);
	mutex_unlock(&phydev->lock);
}

/**
 * phy_mac_interrupt - MAC says the link has changed
 * @phydev: phy_device struct with changed link
 *
 * The MAC layer is able to indicate there has been a change in the PHY link
 * status. Trigger the state machine and work a work queue.
 */
void phy_mac_interrupt(struct phy_device *phydev)
{
	/* Trigger a state machine change */
	phy_trigger_machine(phydev);
}
EXPORT_SYMBOL(phy_mac_interrupt);

static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
{
	linkmode_zero(advertising);

	if (eee_adv & MDIO_EEE_100TX)
		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
				 advertising);
	if (eee_adv & MDIO_EEE_1000T)
		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
				 advertising);
	if (eee_adv & MDIO_EEE_10GT)
		linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
				 advertising);
	if (eee_adv & MDIO_EEE_1000KX)
		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
				 advertising);
	if (eee_adv & MDIO_EEE_10GKX4)
		linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
				 advertising);
	if (eee_adv & MDIO_EEE_10GKR)
		linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
				 advertising);
}

/**
 * phy_init_eee - init and check the EEE feature
 * @phydev: target phy_device struct
 * @clk_stop_enable: PHY may stop the clock during LPI
 *
 * Description: it checks if the Energy-Efficient Ethernet (EEE)
 * is supported by looking at the MMD registers 3.20 and 7.60/61
 * and it programs the MMD register 3.0 setting the "Clock stop enable"
 * bit if required.
 */
int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
{
	if (!phydev->drv)
		return -EIO;

	/* According to 802.3az,the EEE is supported only in full duplex-mode.
	 */
	if (phydev->duplex == DUPLEX_FULL) {
		__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
		__ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
		__ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
		int eee_lp, eee_cap, eee_adv;
		int status;
		u32 cap;

		/* Read phy status to properly get the right settings */
		status = phy_read_status(phydev);
		if (status)
			return status;

		/* First check if the EEE ability is supported */
		eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
		if (eee_cap <= 0)
			goto eee_exit_err;

		cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
		if (!cap)
			goto eee_exit_err;

		/* Check which link settings negotiated and verify it in
		 * the EEE advertising registers.
		 */
		eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
		if (eee_lp <= 0)
			goto eee_exit_err;

		eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
		if (eee_adv <= 0)
			goto eee_exit_err;

		mmd_eee_adv_to_linkmode(adv, eee_adv);
		mmd_eee_adv_to_linkmode(lp, eee_lp);
		linkmode_and(common, adv, lp);

		if (!phy_check_valid(phydev->speed, phydev->duplex, common))
			goto eee_exit_err;

		if (clk_stop_enable)
			/* Configure the PHY to stop receiving xMII
			 * clock while it is signaling LPI.
			 */
			phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
					 MDIO_PCS_CTRL1_CLKSTOP_EN);

		return 0; /* EEE supported */
	}
eee_exit_err:
	return -EPROTONOSUPPORT;
}
EXPORT_SYMBOL(phy_init_eee);

/**
 * phy_get_eee_err - report the EEE wake error count
 * @phydev: target phy_device struct
 *
 * Description: it is to report the number of time where the PHY
 * failed to complete its normal wake sequence.
 */
int phy_get_eee_err(struct phy_device *phydev)
{
	if (!phydev->drv)
		return -EIO;

	return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
}
EXPORT_SYMBOL(phy_get_eee_err);

/**
 * phy_ethtool_get_eee - get EEE supported and status
 * @phydev: target phy_device struct
 * @data: ethtool_eee data
 *
 * Description: it reportes the Supported/Advertisement/LP Advertisement
 * capabilities.
 */
int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
	int val;

	if (!phydev->drv)
		return -EIO;

	/* Get Supported EEE */
	val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
	if (val < 0)
		return val;
	data->supported = mmd_eee_cap_to_ethtool_sup_t(val);

	/* Get advertisement EEE */
	val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
	if (val < 0)
		return val;
	data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
	data->eee_enabled = !!data->advertised;

	/* Get LP advertisement EEE */
	val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
	if (val < 0)
		return val;
	data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);

	data->eee_active = !!(data->advertised & data->lp_advertised);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_eee);

/**
 * phy_ethtool_set_eee - set EEE supported and status
 * @phydev: target phy_device struct
 * @data: ethtool_eee data
 *
 * Description: it is to program the Advertisement EEE register.
 */
int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
	int cap, old_adv, adv = 0, ret;

	if (!phydev->drv)
		return -EIO;

	/* Get Supported EEE */
	cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
	if (cap < 0)
		return cap;

	old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
	if (old_adv < 0)
		return old_adv;

	if (data->eee_enabled) {
		adv = !data->advertised ? cap :
		      ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
		/* Mask prohibited EEE modes */
		adv &= ~phydev->eee_broken_modes;
	}

	if (old_adv != adv) {
		ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
		if (ret < 0)
			return ret;

		/* Restart autonegotiation so the new modes get sent to the
		 * link partner.
		 */
		if (phydev->autoneg == AUTONEG_ENABLE) {
			ret = phy_restart_aneg(phydev);
			if (ret < 0)
				return ret;
		}
	}

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_set_eee);

/**
 * phy_ethtool_set_wol - Configure Wake On LAN
 *
 * @phydev: target phy_device struct
 * @wol: Configuration requested
 */
int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
{
	if (phydev->drv && phydev->drv->set_wol)
		return phydev->drv->set_wol(phydev, wol);

	return -EOPNOTSUPP;
}
EXPORT_SYMBOL(phy_ethtool_set_wol);

/**
 * phy_ethtool_get_wol - Get the current Wake On LAN configuration
 *
 * @phydev: target phy_device struct
 * @wol: Store the current configuration here
 */
void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
{
	if (phydev->drv && phydev->drv->get_wol)
		phydev->drv->get_wol(phydev, wol);
}
EXPORT_SYMBOL(phy_ethtool_get_wol);

int phy_ethtool_get_link_ksettings(struct net_device *ndev,
				   struct ethtool_link_ksettings *cmd)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	phy_ethtool_ksettings_get(phydev, cmd);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);

int phy_ethtool_set_link_ksettings(struct net_device *ndev,
				   const struct ethtool_link_ksettings *cmd)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	return phy_ethtool_ksettings_set(phydev, cmd);
}
EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);

/**
 * phy_ethtool_nway_reset - Restart auto negotiation
 * @ndev: Network device to restart autoneg for
 */
int phy_ethtool_nway_reset(struct net_device *ndev)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	if (!phydev->drv)
		return -EIO;

	return phy_restart_aneg(phydev);
}
EXPORT_SYMBOL(phy_ethtool_nway_reset);