summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
blob: 9f87304109fe805a8356a3962d0f72626ba0077a (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
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */

/* ethtool support for iavf */
#include "iavf.h"

#include <linux/uaccess.h>

/* ethtool statistics helpers */

/**
 * struct iavf_stats - definition for an ethtool statistic
 * @stat_string: statistic name to display in ethtool -S output
 * @sizeof_stat: the sizeof() the stat, must be no greater than sizeof(u64)
 * @stat_offset: offsetof() the stat from a base pointer
 *
 * This structure defines a statistic to be added to the ethtool stats buffer.
 * It defines a statistic as offset from a common base pointer. Stats should
 * be defined in constant arrays using the IAVF_STAT macro, with every element
 * of the array using the same _type for calculating the sizeof_stat and
 * stat_offset.
 *
 * The @sizeof_stat is expected to be sizeof(u8), sizeof(u16), sizeof(u32) or
 * sizeof(u64). Other sizes are not expected and will produce a WARN_ONCE from
 * the iavf_add_ethtool_stat() helper function.
 *
 * The @stat_string is interpreted as a format string, allowing formatted
 * values to be inserted while looping over multiple structures for a given
 * statistics array. Thus, every statistic string in an array should have the
 * same type and number of format specifiers, to be formatted by variadic
 * arguments to the iavf_add_stat_string() helper function.
 **/
struct iavf_stats {
	char stat_string[ETH_GSTRING_LEN];
	int sizeof_stat;
	int stat_offset;
};

/* Helper macro to define an iavf_stat structure with proper size and type.
 * Use this when defining constant statistics arrays. Note that @_type expects
 * only a type name and is used multiple times.
 */
#define IAVF_STAT(_type, _name, _stat) { \
	.stat_string = _name, \
	.sizeof_stat = FIELD_SIZEOF(_type, _stat), \
	.stat_offset = offsetof(_type, _stat) \
}

/* Helper macro for defining some statistics related to queues */
#define IAVF_QUEUE_STAT(_name, _stat) \
	IAVF_STAT(struct iavf_ring, _name, _stat)

/* Stats associated with a Tx or Rx ring */
static const struct iavf_stats iavf_gstrings_queue_stats[] = {
	IAVF_QUEUE_STAT("%s-%u.packets", stats.packets),
	IAVF_QUEUE_STAT("%s-%u.bytes", stats.bytes),
};

/**
 * iavf_add_one_ethtool_stat - copy the stat into the supplied buffer
 * @data: location to store the stat value
 * @pointer: basis for where to copy from
 * @stat: the stat definition
 *
 * Copies the stat data defined by the pointer and stat structure pair into
 * the memory supplied as data. Used to implement iavf_add_ethtool_stats and
 * iavf_add_queue_stats. If the pointer is null, data will be zero'd.
 */
static void
iavf_add_one_ethtool_stat(u64 *data, void *pointer,
			  const struct iavf_stats *stat)
{
	char *p;

	if (!pointer) {
		/* ensure that the ethtool data buffer is zero'd for any stats
		 * which don't have a valid pointer.
		 */
		*data = 0;
		return;
	}

	p = (char *)pointer + stat->stat_offset;
	switch (stat->sizeof_stat) {
	case sizeof(u64):
		*data = *((u64 *)p);
		break;
	case sizeof(u32):
		*data = *((u32 *)p);
		break;
	case sizeof(u16):
		*data = *((u16 *)p);
		break;
	case sizeof(u8):
		*data = *((u8 *)p);
		break;
	default:
		WARN_ONCE(1, "unexpected stat size for %s",
			  stat->stat_string);
		*data = 0;
	}
}

/**
 * __iavf_add_ethtool_stats - copy stats into the ethtool supplied buffer
 * @data: ethtool stats buffer
 * @pointer: location to copy stats from
 * @stats: array of stats to copy
 * @size: the size of the stats definition
 *
 * Copy the stats defined by the stats array using the pointer as a base into
 * the data buffer supplied by ethtool. Updates the data pointer to point to
 * the next empty location for successive calls to __iavf_add_ethtool_stats.
 * If pointer is null, set the data values to zero and update the pointer to
 * skip these stats.
 **/
static void
__iavf_add_ethtool_stats(u64 **data, void *pointer,
			 const struct iavf_stats stats[],
			 const unsigned int size)
{
	unsigned int i;

	for (i = 0; i < size; i++)
		iavf_add_one_ethtool_stat((*data)++, pointer, &stats[i]);
}

/**
 * iavf_add_ethtool_stats - copy stats into ethtool supplied buffer
 * @data: ethtool stats buffer
 * @pointer: location where stats are stored
 * @stats: static const array of stat definitions
 *
 * Macro to ease the use of __iavf_add_ethtool_stats by taking a static
 * constant stats array and passing the ARRAY_SIZE(). This avoids typos by
 * ensuring that we pass the size associated with the given stats array.
 *
 * The parameter @stats is evaluated twice, so parameters with side effects
 * should be avoided.
 **/
#define iavf_add_ethtool_stats(data, pointer, stats) \
	__iavf_add_ethtool_stats(data, pointer, stats, ARRAY_SIZE(stats))

/**
 * iavf_add_queue_stats - copy queue statistics into supplied buffer
 * @data: ethtool stats buffer
 * @ring: the ring to copy
 *
 * Queue statistics must be copied while protected by
 * u64_stats_fetch_begin_irq, so we can't directly use iavf_add_ethtool_stats.
 * Assumes that queue stats are defined in iavf_gstrings_queue_stats. If the
 * ring pointer is null, zero out the queue stat values and update the data
 * pointer. Otherwise safely copy the stats from the ring into the supplied
 * buffer and update the data pointer when finished.
 *
 * This function expects to be called while under rcu_read_lock().
 **/
static void
iavf_add_queue_stats(u64 **data, struct iavf_ring *ring)
{
	const unsigned int size = ARRAY_SIZE(iavf_gstrings_queue_stats);
	const struct iavf_stats *stats = iavf_gstrings_queue_stats;
	unsigned int start;
	unsigned int i;

	/* To avoid invalid statistics values, ensure that we keep retrying
	 * the copy until we get a consistent value according to
	 * u64_stats_fetch_retry_irq. But first, make sure our ring is
	 * non-null before attempting to access its syncp.
	 */
	do {
		start = !ring ? 0 : u64_stats_fetch_begin_irq(&ring->syncp);
		for (i = 0; i < size; i++)
			iavf_add_one_ethtool_stat(&(*data)[i], ring, &stats[i]);
	} while (ring && u64_stats_fetch_retry_irq(&ring->syncp, start));

	/* Once we successfully copy the stats in, update the data pointer */
	*data += size;
}

/**
 * __iavf_add_stat_strings - copy stat strings into ethtool buffer
 * @p: ethtool supplied buffer
 * @stats: stat definitions array
 * @size: size of the stats array
 *
 * Format and copy the strings described by stats into the buffer pointed at
 * by p.
 **/
static void __iavf_add_stat_strings(u8 **p, const struct iavf_stats stats[],
				    const unsigned int size, ...)
{
	unsigned int i;

	for (i = 0; i < size; i++) {
		va_list args;

		va_start(args, size);
		vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
		*p += ETH_GSTRING_LEN;
		va_end(args);
	}
}

/**
 * iavf_add_stat_strings - copy stat strings into ethtool buffer
 * @p: ethtool supplied buffer
 * @stats: stat definitions array
 *
 * Format and copy the strings described by the const static stats value into
 * the buffer pointed at by p.
 *
 * The parameter @stats is evaluated twice, so parameters with side effects
 * should be avoided. Additionally, stats must be an array such that
 * ARRAY_SIZE can be called on it.
 **/
#define iavf_add_stat_strings(p, stats, ...) \
	__iavf_add_stat_strings(p, stats, ARRAY_SIZE(stats), ## __VA_ARGS__)

#define VF_STAT(_name, _stat) \
	IAVF_STAT(struct iavf_adapter, _name, _stat)

static const struct iavf_stats iavf_gstrings_stats[] = {
	VF_STAT("rx_bytes", current_stats.rx_bytes),
	VF_STAT("rx_unicast", current_stats.rx_unicast),
	VF_STAT("rx_multicast", current_stats.rx_multicast),
	VF_STAT("rx_broadcast", current_stats.rx_broadcast),
	VF_STAT("rx_discards", current_stats.rx_discards),
	VF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
	VF_STAT("tx_bytes", current_stats.tx_bytes),
	VF_STAT("tx_unicast", current_stats.tx_unicast),
	VF_STAT("tx_multicast", current_stats.tx_multicast),
	VF_STAT("tx_broadcast", current_stats.tx_broadcast),
	VF_STAT("tx_discards", current_stats.tx_discards),
	VF_STAT("tx_errors", current_stats.tx_errors),
};

#define IAVF_STATS_LEN	ARRAY_SIZE(iavf_gstrings_stats)

#define IAVF_QUEUE_STATS_LEN	ARRAY_SIZE(iavf_gstrings_queue_stats)

/* For now we have one and only one private flag and it is only defined
 * when we have support for the SKIP_CPU_SYNC DMA attribute.  Instead
 * of leaving all this code sitting around empty we will strip it unless
 * our one private flag is actually available.
 */
struct iavf_priv_flags {
	char flag_string[ETH_GSTRING_LEN];
	u32 flag;
	bool read_only;
};

#define IAVF_PRIV_FLAG(_name, _flag, _read_only) { \
	.flag_string = _name, \
	.flag = _flag, \
	.read_only = _read_only, \
}

static const struct iavf_priv_flags iavf_gstrings_priv_flags[] = {
	IAVF_PRIV_FLAG("legacy-rx", IAVF_FLAG_LEGACY_RX, 0),
};

#define IAVF_PRIV_FLAGS_STR_LEN ARRAY_SIZE(iavf_gstrings_priv_flags)

/**
 * iavf_get_link_ksettings - Get Link Speed and Duplex settings
 * @netdev: network interface device structure
 * @cmd: ethtool command
 *
 * Reports speed/duplex settings. Because this is a VF, we don't know what
 * kind of link we really have, so we fake it.
 **/
static int iavf_get_link_ksettings(struct net_device *netdev,
				   struct ethtool_link_ksettings *cmd)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	ethtool_link_ksettings_zero_link_mode(cmd, supported);
	cmd->base.autoneg = AUTONEG_DISABLE;
	cmd->base.port = PORT_NONE;
	/* Set speed and duplex */
	switch (adapter->link_speed) {
	case I40E_LINK_SPEED_40GB:
		cmd->base.speed = SPEED_40000;
		break;
	case I40E_LINK_SPEED_25GB:
#ifdef SPEED_25000
		cmd->base.speed = SPEED_25000;
#else
		netdev_info(netdev,
			    "Speed is 25G, display not supported by this version of ethtool.\n");
#endif
		break;
	case I40E_LINK_SPEED_20GB:
		cmd->base.speed = SPEED_20000;
		break;
	case I40E_LINK_SPEED_10GB:
		cmd->base.speed = SPEED_10000;
		break;
	case I40E_LINK_SPEED_1GB:
		cmd->base.speed = SPEED_1000;
		break;
	case I40E_LINK_SPEED_100MB:
		cmd->base.speed = SPEED_100;
		break;
	default:
		break;
	}
	cmd->base.duplex = DUPLEX_FULL;

	return 0;
}

/**
 * iavf_get_sset_count - Get length of string set
 * @netdev: network interface device structure
 * @sset: id of string set
 *
 * Reports size of various string tables.
 **/
static int iavf_get_sset_count(struct net_device *netdev, int sset)
{
	if (sset == ETH_SS_STATS)
		return IAVF_STATS_LEN +
			(IAVF_QUEUE_STATS_LEN * 2 * IAVF_MAX_REQ_QUEUES);
	else if (sset == ETH_SS_PRIV_FLAGS)
		return IAVF_PRIV_FLAGS_STR_LEN;
	else
		return -EINVAL;
}

/**
 * iavf_get_ethtool_stats - report device statistics
 * @netdev: network interface device structure
 * @stats: ethtool statistics structure
 * @data: pointer to data buffer
 *
 * All statistics are added to the data buffer as an array of u64.
 **/
static void iavf_get_ethtool_stats(struct net_device *netdev,
				   struct ethtool_stats *stats, u64 *data)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	unsigned int i;

	iavf_add_ethtool_stats(&data, adapter, iavf_gstrings_stats);

	rcu_read_lock();
	for (i = 0; i < IAVF_MAX_REQ_QUEUES; i++) {
		struct iavf_ring *ring;

		/* Avoid accessing un-allocated queues */
		ring = (i < adapter->num_active_queues ?
			&adapter->tx_rings[i] : NULL);
		iavf_add_queue_stats(&data, ring);

		/* Avoid accessing un-allocated queues */
		ring = (i < adapter->num_active_queues ?
			&adapter->rx_rings[i] : NULL);
		iavf_add_queue_stats(&data, ring);
	}
	rcu_read_unlock();
}

/**
 * iavf_get_priv_flag_strings - Get private flag strings
 * @netdev: network interface device structure
 * @data: buffer for string data
 *
 * Builds the private flags string table
 **/
static void iavf_get_priv_flag_strings(struct net_device *netdev, u8 *data)
{
	unsigned int i;

	for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
		snprintf(data, ETH_GSTRING_LEN, "%s",
			 iavf_gstrings_priv_flags[i].flag_string);
		data += ETH_GSTRING_LEN;
	}
}

/**
 * iavf_get_stat_strings - Get stat strings
 * @netdev: network interface device structure
 * @data: buffer for string data
 *
 * Builds the statistics string table
 **/
static void iavf_get_stat_strings(struct net_device *netdev, u8 *data)
{
	unsigned int i;

	iavf_add_stat_strings(&data, iavf_gstrings_stats);

	/* Queues are always allocated in pairs, so we just use num_tx_queues
	 * for both Tx and Rx queues.
	 */
	for (i = 0; i < netdev->num_tx_queues; i++) {
		iavf_add_stat_strings(&data, iavf_gstrings_queue_stats,
				      "tx", i);
		iavf_add_stat_strings(&data, iavf_gstrings_queue_stats,
				      "rx", i);
	}
}

/**
 * iavf_get_strings - Get string set
 * @netdev: network interface device structure
 * @sset: id of string set
 * @data: buffer for string data
 *
 * Builds string tables for various string sets
 **/
static void iavf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
{
	switch (sset) {
	case ETH_SS_STATS:
		iavf_get_stat_strings(netdev, data);
		break;
	case ETH_SS_PRIV_FLAGS:
		iavf_get_priv_flag_strings(netdev, data);
		break;
	default:
		break;
	}
}

/**
 * iavf_get_priv_flags - report device private flags
 * @netdev: network interface device structure
 *
 * The get string set count and the string set should be matched for each
 * flag returned.  Add new strings for each flag to the iavf_gstrings_priv_flags
 * array.
 *
 * Returns a u32 bitmap of flags.
 **/
static u32 iavf_get_priv_flags(struct net_device *netdev)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	u32 i, ret_flags = 0;

	for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
		const struct iavf_priv_flags *priv_flags;

		priv_flags = &iavf_gstrings_priv_flags[i];

		if (priv_flags->flag & adapter->flags)
			ret_flags |= BIT(i);
	}

	return ret_flags;
}

/**
 * iavf_set_priv_flags - set private flags
 * @netdev: network interface device structure
 * @flags: bit flags to be set
 **/
static int iavf_set_priv_flags(struct net_device *netdev, u32 flags)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	u32 orig_flags, new_flags, changed_flags;
	u32 i;

	orig_flags = READ_ONCE(adapter->flags);
	new_flags = orig_flags;

	for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
		const struct iavf_priv_flags *priv_flags;

		priv_flags = &iavf_gstrings_priv_flags[i];

		if (flags & BIT(i))
			new_flags |= priv_flags->flag;
		else
			new_flags &= ~(priv_flags->flag);

		if (priv_flags->read_only &&
		    ((orig_flags ^ new_flags) & ~BIT(i)))
			return -EOPNOTSUPP;
	}

	/* Before we finalize any flag changes, any checks which we need to
	 * perform to determine if the new flags will be supported should go
	 * here...
	 */

	/* Compare and exchange the new flags into place. If we failed, that
	 * is if cmpxchg returns anything but the old value, this means
	 * something else must have modified the flags variable since we
	 * copied it. We'll just punt with an error and log something in the
	 * message buffer.
	 */
	if (cmpxchg(&adapter->flags, orig_flags, new_flags) != orig_flags) {
		dev_warn(&adapter->pdev->dev,
			 "Unable to update adapter->flags as it was modified by another thread...\n");
		return -EAGAIN;
	}

	changed_flags = orig_flags ^ new_flags;

	/* Process any additional changes needed as a result of flag changes.
	 * The changed_flags value reflects the list of bits that were changed
	 * in the code above.
	 */

	/* issue a reset to force legacy-rx change to take effect */
	if (changed_flags & IAVF_FLAG_LEGACY_RX) {
		if (netif_running(netdev)) {
			adapter->flags |= IAVF_FLAG_RESET_NEEDED;
			schedule_work(&adapter->reset_task);
		}
	}

	return 0;
}

/**
 * iavf_get_msglevel - Get debug message level
 * @netdev: network interface device structure
 *
 * Returns current debug message level.
 **/
static u32 iavf_get_msglevel(struct net_device *netdev)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	return adapter->msg_enable;
}

/**
 * iavf_set_msglevel - Set debug message level
 * @netdev: network interface device structure
 * @data: message level
 *
 * Set current debug message level. Higher values cause the driver to
 * be noisier.
 **/
static void iavf_set_msglevel(struct net_device *netdev, u32 data)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	if (IAVF_DEBUG_USER & data)
		adapter->hw.debug_mask = data;
	adapter->msg_enable = data;
}

/**
 * iavf_get_drvinfo - Get driver info
 * @netdev: network interface device structure
 * @drvinfo: ethool driver info structure
 *
 * Returns information about the driver and device for display to the user.
 **/
static void iavf_get_drvinfo(struct net_device *netdev,
			     struct ethtool_drvinfo *drvinfo)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	strlcpy(drvinfo->driver, iavf_driver_name, 32);
	strlcpy(drvinfo->version, iavf_driver_version, 32);
	strlcpy(drvinfo->fw_version, "N/A", 4);
	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
	drvinfo->n_priv_flags = IAVF_PRIV_FLAGS_STR_LEN;
}

/**
 * iavf_get_ringparam - Get ring parameters
 * @netdev: network interface device structure
 * @ring: ethtool ringparam structure
 *
 * Returns current ring parameters. TX and RX rings are reported separately,
 * but the number of rings is not reported.
 **/
static void iavf_get_ringparam(struct net_device *netdev,
			       struct ethtool_ringparam *ring)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	ring->rx_max_pending = IAVF_MAX_RXD;
	ring->tx_max_pending = IAVF_MAX_TXD;
	ring->rx_pending = adapter->rx_desc_count;
	ring->tx_pending = adapter->tx_desc_count;
}

/**
 * iavf_set_ringparam - Set ring parameters
 * @netdev: network interface device structure
 * @ring: ethtool ringparam structure
 *
 * Sets ring parameters. TX and RX rings are controlled separately, but the
 * number of rings is not specified, so all rings get the same settings.
 **/
static int iavf_set_ringparam(struct net_device *netdev,
			      struct ethtool_ringparam *ring)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	u32 new_rx_count, new_tx_count;

	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
		return -EINVAL;

	new_tx_count = clamp_t(u32, ring->tx_pending,
			       IAVF_MIN_TXD,
			       IAVF_MAX_TXD);
	new_tx_count = ALIGN(new_tx_count, IAVF_REQ_DESCRIPTOR_MULTIPLE);

	new_rx_count = clamp_t(u32, ring->rx_pending,
			       IAVF_MIN_RXD,
			       IAVF_MAX_RXD);
	new_rx_count = ALIGN(new_rx_count, IAVF_REQ_DESCRIPTOR_MULTIPLE);

	/* if nothing to do return success */
	if ((new_tx_count == adapter->tx_desc_count) &&
	    (new_rx_count == adapter->rx_desc_count))
		return 0;

	adapter->tx_desc_count = new_tx_count;
	adapter->rx_desc_count = new_rx_count;

	if (netif_running(netdev)) {
		adapter->flags |= IAVF_FLAG_RESET_NEEDED;
		schedule_work(&adapter->reset_task);
	}

	return 0;
}

/**
 * __iavf_get_coalesce - get per-queue coalesce settings
 * @netdev: the netdev to check
 * @ec: ethtool coalesce data structure
 * @queue: which queue to pick
 *
 * Gets the per-queue settings for coalescence. Specifically Rx and Tx usecs
 * are per queue. If queue is <0 then we default to queue 0 as the
 * representative value.
 **/
static int __iavf_get_coalesce(struct net_device *netdev,
			       struct ethtool_coalesce *ec, int queue)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	struct iavf_vsi *vsi = &adapter->vsi;
	struct iavf_ring *rx_ring, *tx_ring;

	ec->tx_max_coalesced_frames = vsi->work_limit;
	ec->rx_max_coalesced_frames = vsi->work_limit;

	/* Rx and Tx usecs per queue value. If user doesn't specify the
	 * queue, return queue 0's value to represent.
	 */
	if (queue < 0)
		queue = 0;
	else if (queue >= adapter->num_active_queues)
		return -EINVAL;

	rx_ring = &adapter->rx_rings[queue];
	tx_ring = &adapter->tx_rings[queue];

	if (ITR_IS_DYNAMIC(rx_ring->itr_setting))
		ec->use_adaptive_rx_coalesce = 1;

	if (ITR_IS_DYNAMIC(tx_ring->itr_setting))
		ec->use_adaptive_tx_coalesce = 1;

	ec->rx_coalesce_usecs = rx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
	ec->tx_coalesce_usecs = tx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;

	return 0;
}

/**
 * iavf_get_coalesce - Get interrupt coalescing settings
 * @netdev: network interface device structure
 * @ec: ethtool coalesce structure
 *
 * Returns current coalescing settings. This is referred to elsewhere in the
 * driver as Interrupt Throttle Rate, as this is how the hardware describes
 * this functionality. Note that if per-queue settings have been modified this
 * only represents the settings of queue 0.
 **/
static int iavf_get_coalesce(struct net_device *netdev,
			     struct ethtool_coalesce *ec)
{
	return __iavf_get_coalesce(netdev, ec, -1);
}

/**
 * iavf_get_per_queue_coalesce - get coalesce values for specific queue
 * @netdev: netdev to read
 * @ec: coalesce settings from ethtool
 * @queue: the queue to read
 *
 * Read specific queue's coalesce settings.
 **/
static int iavf_get_per_queue_coalesce(struct net_device *netdev, u32 queue,
				       struct ethtool_coalesce *ec)
{
	return __iavf_get_coalesce(netdev, ec, queue);
}

/**
 * iavf_set_itr_per_queue - set ITR values for specific queue
 * @adapter: the VF adapter struct to set values for
 * @ec: coalesce settings from ethtool
 * @queue: the queue to modify
 *
 * Change the ITR settings for a specific queue.
 **/
static void iavf_set_itr_per_queue(struct iavf_adapter *adapter,
				   struct ethtool_coalesce *ec, int queue)
{
	struct iavf_ring *rx_ring = &adapter->rx_rings[queue];
	struct iavf_ring *tx_ring = &adapter->tx_rings[queue];
	struct iavf_q_vector *q_vector;

	rx_ring->itr_setting = ITR_REG_ALIGN(ec->rx_coalesce_usecs);
	tx_ring->itr_setting = ITR_REG_ALIGN(ec->tx_coalesce_usecs);

	rx_ring->itr_setting |= IAVF_ITR_DYNAMIC;
	if (!ec->use_adaptive_rx_coalesce)
		rx_ring->itr_setting ^= IAVF_ITR_DYNAMIC;

	tx_ring->itr_setting |= IAVF_ITR_DYNAMIC;
	if (!ec->use_adaptive_tx_coalesce)
		tx_ring->itr_setting ^= IAVF_ITR_DYNAMIC;

	q_vector = rx_ring->q_vector;
	q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);

	q_vector = tx_ring->q_vector;
	q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);

	/* The interrupt handler itself will take care of programming
	 * the Tx and Rx ITR values based on the values we have entered
	 * into the q_vector, no need to write the values now.
	 */
}

/**
 * __iavf_set_coalesce - set coalesce settings for particular queue
 * @netdev: the netdev to change
 * @ec: ethtool coalesce settings
 * @queue: the queue to change
 *
 * Sets the coalesce settings for a particular queue.
 **/
static int __iavf_set_coalesce(struct net_device *netdev,
			       struct ethtool_coalesce *ec, int queue)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	struct iavf_vsi *vsi = &adapter->vsi;
	int i;

	if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
		vsi->work_limit = ec->tx_max_coalesced_frames_irq;

	if (ec->rx_coalesce_usecs == 0) {
		if (ec->use_adaptive_rx_coalesce)
			netif_info(adapter, drv, netdev, "rx-usecs=0, need to disable adaptive-rx for a complete disable\n");
	} else if ((ec->rx_coalesce_usecs < IAVF_MIN_ITR) ||
		   (ec->rx_coalesce_usecs > IAVF_MAX_ITR)) {
		netif_info(adapter, drv, netdev, "Invalid value, rx-usecs range is 0-8160\n");
		return -EINVAL;
	} else if (ec->tx_coalesce_usecs == 0) {
		if (ec->use_adaptive_tx_coalesce)
			netif_info(adapter, drv, netdev, "tx-usecs=0, need to disable adaptive-tx for a complete disable\n");
	} else if ((ec->tx_coalesce_usecs < IAVF_MIN_ITR) ||
		   (ec->tx_coalesce_usecs > IAVF_MAX_ITR)) {
		netif_info(adapter, drv, netdev, "Invalid value, tx-usecs range is 0-8160\n");
		return -EINVAL;
	}

	/* Rx and Tx usecs has per queue value. If user doesn't specify the
	 * queue, apply to all queues.
	 */
	if (queue < 0) {
		for (i = 0; i < adapter->num_active_queues; i++)
			iavf_set_itr_per_queue(adapter, ec, i);
	} else if (queue < adapter->num_active_queues) {
		iavf_set_itr_per_queue(adapter, ec, queue);
	} else {
		netif_info(adapter, drv, netdev, "Invalid queue value, queue range is 0 - %d\n",
			   adapter->num_active_queues - 1);
		return -EINVAL;
	}

	return 0;
}

/**
 * iavf_set_coalesce - Set interrupt coalescing settings
 * @netdev: network interface device structure
 * @ec: ethtool coalesce structure
 *
 * Change current coalescing settings for every queue.
 **/
static int iavf_set_coalesce(struct net_device *netdev,
			     struct ethtool_coalesce *ec)
{
	return __iavf_set_coalesce(netdev, ec, -1);
}

/**
 * iavf_set_per_queue_coalesce - set specific queue's coalesce settings
 * @netdev: the netdev to change
 * @ec: ethtool's coalesce settings
 * @queue: the queue to modify
 *
 * Modifies a specific queue's coalesce settings.
 */
static int iavf_set_per_queue_coalesce(struct net_device *netdev, u32 queue,
				       struct ethtool_coalesce *ec)
{
	return __iavf_set_coalesce(netdev, ec, queue);
}

/**
 * iavf_get_rxnfc - command to get RX flow classification rules
 * @netdev: network interface device structure
 * @cmd: ethtool rxnfc command
 * @rule_locs: pointer to store rule locations
 *
 * Returns Success if the command is supported.
 **/
static int iavf_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
			  u32 *rule_locs)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	int ret = -EOPNOTSUPP;

	switch (cmd->cmd) {
	case ETHTOOL_GRXRINGS:
		cmd->data = adapter->num_active_queues;
		ret = 0;
		break;
	case ETHTOOL_GRXFH:
		netdev_info(netdev,
			    "RSS hash info is not available to vf, use pf.\n");
		break;
	default:
		break;
	}

	return ret;
}
/**
 * iavf_get_channels: get the number of channels supported by the device
 * @netdev: network interface device structure
 * @ch: channel information structure
 *
 * For the purposes of our device, we only use combined channels, i.e. a tx/rx
 * queue pair. Report one extra channel to match our "other" MSI-X vector.
 **/
static void iavf_get_channels(struct net_device *netdev,
			      struct ethtool_channels *ch)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	/* Report maximum channels */
	ch->max_combined = IAVF_MAX_REQ_QUEUES;

	ch->max_other = NONQ_VECS;
	ch->other_count = NONQ_VECS;

	ch->combined_count = adapter->num_active_queues;
}

/**
 * iavf_set_channels: set the new channel count
 * @netdev: network interface device structure
 * @ch: channel information structure
 *
 * Negotiate a new number of channels with the PF then do a reset.  During
 * reset we'll realloc queues and fix the RSS table.  Returns 0 on success,
 * negative on failure.
 **/
static int iavf_set_channels(struct net_device *netdev,
			     struct ethtool_channels *ch)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	int num_req = ch->combined_count;

	if (num_req != adapter->num_active_queues &&
	    !(adapter->vf_res->vf_cap_flags &
	      VIRTCHNL_VF_OFFLOAD_REQ_QUEUES)) {
		dev_info(&adapter->pdev->dev, "PF is not capable of queue negotiation.\n");
		return -EINVAL;
	}

	if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
	    adapter->num_tc) {
		dev_info(&adapter->pdev->dev, "Cannot set channels since ADq is enabled.\n");
		return -EINVAL;
	}

	/* All of these should have already been checked by ethtool before this
	 * even gets to us, but just to be sure.
	 */
	if (num_req <= 0 || num_req > IAVF_MAX_REQ_QUEUES)
		return -EINVAL;

	if (ch->rx_count || ch->tx_count || ch->other_count != NONQ_VECS)
		return -EINVAL;

	adapter->num_req_queues = num_req;
	return iavf_request_queues(adapter, num_req);
}

/**
 * iavf_get_rxfh_key_size - get the RSS hash key size
 * @netdev: network interface device structure
 *
 * Returns the table size.
 **/
static u32 iavf_get_rxfh_key_size(struct net_device *netdev)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	return adapter->rss_key_size;
}

/**
 * iavf_get_rxfh_indir_size - get the rx flow hash indirection table size
 * @netdev: network interface device structure
 *
 * Returns the table size.
 **/
static u32 iavf_get_rxfh_indir_size(struct net_device *netdev)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);

	return adapter->rss_lut_size;
}

/**
 * iavf_get_rxfh - get the rx flow hash indirection table
 * @netdev: network interface device structure
 * @indir: indirection table
 * @key: hash key
 * @hfunc: hash function in use
 *
 * Reads the indirection table directly from the hardware. Always returns 0.
 **/
static int iavf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
			 u8 *hfunc)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	u16 i;

	if (hfunc)
		*hfunc = ETH_RSS_HASH_TOP;
	if (!indir)
		return 0;

	memcpy(key, adapter->rss_key, adapter->rss_key_size);

	/* Each 32 bits pointed by 'indir' is stored with a lut entry */
	for (i = 0; i < adapter->rss_lut_size; i++)
		indir[i] = (u32)adapter->rss_lut[i];

	return 0;
}

/**
 * iavf_set_rxfh - set the rx flow hash indirection table
 * @netdev: network interface device structure
 * @indir: indirection table
 * @key: hash key
 * @hfunc: hash function to use
 *
 * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
 * returns 0 after programming the table.
 **/
static int iavf_set_rxfh(struct net_device *netdev, const u32 *indir,
			 const u8 *key, const u8 hfunc)
{
	struct iavf_adapter *adapter = netdev_priv(netdev);
	u16 i;

	/* We do not allow change in unsupported parameters */
	if (key ||
	    (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
		return -EOPNOTSUPP;
	if (!indir)
		return 0;

	if (key)
		memcpy(adapter->rss_key, key, adapter->rss_key_size);

	/* Each 32 bits pointed by 'indir' is stored with a lut entry */
	for (i = 0; i < adapter->rss_lut_size; i++)
		adapter->rss_lut[i] = (u8)(indir[i]);

	return iavf_config_rss(adapter);
}

static const struct ethtool_ops iavf_ethtool_ops = {
	.get_drvinfo		= iavf_get_drvinfo,
	.get_link		= ethtool_op_get_link,
	.get_ringparam		= iavf_get_ringparam,
	.set_ringparam		= iavf_set_ringparam,
	.get_strings		= iavf_get_strings,
	.get_ethtool_stats	= iavf_get_ethtool_stats,
	.get_sset_count		= iavf_get_sset_count,
	.get_priv_flags		= iavf_get_priv_flags,
	.set_priv_flags		= iavf_set_priv_flags,
	.get_msglevel		= iavf_get_msglevel,
	.set_msglevel		= iavf_set_msglevel,
	.get_coalesce		= iavf_get_coalesce,
	.set_coalesce		= iavf_set_coalesce,
	.get_per_queue_coalesce = iavf_get_per_queue_coalesce,
	.set_per_queue_coalesce = iavf_set_per_queue_coalesce,
	.get_rxnfc		= iavf_get_rxnfc,
	.get_rxfh_indir_size	= iavf_get_rxfh_indir_size,
	.get_rxfh		= iavf_get_rxfh,
	.set_rxfh		= iavf_set_rxfh,
	.get_channels		= iavf_get_channels,
	.set_channels		= iavf_set_channels,
	.get_rxfh_key_size	= iavf_get_rxfh_key_size,
	.get_link_ksettings	= iavf_get_link_ksettings,
};

/**
 * iavf_set_ethtool_ops - Initialize ethtool ops struct
 * @netdev: network interface device structure
 *
 * Sets ethtool ops struct in our netdev so that ethtool can call
 * our functions.
 **/
void iavf_set_ethtool_ops(struct net_device *netdev)
{
	netdev->ethtool_ops = &iavf_ethtool_ops;
}