summaryrefslogtreecommitdiffstats
path: root/drivers/net/sfc/ethtool.c
blob: 3aaece6b12cc99723254c4cc9d73e8c5ed2ac9b0 (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
/****************************************************************************
 * Driver for Solarflare Solarstorm network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006-2008 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include "net_driver.h"
#include "workarounds.h"
#include "selftest.h"
#include "efx.h"
#include "ethtool.h"
#include "falcon.h"
#include "spi.h"
#include "mdio_10g.h"

const char *efx_loopback_mode_names[] = {
	[LOOPBACK_NONE]		= "NONE",
	[LOOPBACK_GMAC]		= "GMAC",
	[LOOPBACK_XGMII]	= "XGMII",
	[LOOPBACK_XGXS]		= "XGXS",
	[LOOPBACK_XAUI] 	= "XAUI",
	[LOOPBACK_GPHY]		= "GPHY",
	[LOOPBACK_PHYXS]	= "PHYXS",
	[LOOPBACK_PCS]	 	= "PCS",
	[LOOPBACK_PMAPMD]	= "PMA/PMD",
	[LOOPBACK_NETWORK]	= "NETWORK",
};

struct ethtool_string {
	char name[ETH_GSTRING_LEN];
};

struct efx_ethtool_stat {
	const char *name;
	enum {
		EFX_ETHTOOL_STAT_SOURCE_mac_stats,
		EFX_ETHTOOL_STAT_SOURCE_nic,
		EFX_ETHTOOL_STAT_SOURCE_channel
	} source;
	unsigned offset;
	u64(*get_stat) (void *field); /* Reader function */
};

/* Initialiser for a struct #efx_ethtool_stat with type-checking */
#define EFX_ETHTOOL_STAT(stat_name, source_name, field, field_type, \
				get_stat_function) {			\
	.name = #stat_name,						\
	.source = EFX_ETHTOOL_STAT_SOURCE_##source_name,		\
	.offset = ((((field_type *) 0) ==				\
		      &((struct efx_##source_name *)0)->field) ?	\
		    offsetof(struct efx_##source_name, field) :		\
		    offsetof(struct efx_##source_name, field)),		\
	.get_stat = get_stat_function,					\
}

static u64 efx_get_uint_stat(void *field)
{
	return *(unsigned int *)field;
}

static u64 efx_get_ulong_stat(void *field)
{
	return *(unsigned long *)field;
}

static u64 efx_get_u64_stat(void *field)
{
	return *(u64 *) field;
}

static u64 efx_get_atomic_stat(void *field)
{
	return atomic_read((atomic_t *) field);
}

#define EFX_ETHTOOL_ULONG_MAC_STAT(field)			\
	EFX_ETHTOOL_STAT(field, mac_stats, field, 		\
			  unsigned long, efx_get_ulong_stat)

#define EFX_ETHTOOL_U64_MAC_STAT(field)				\
	EFX_ETHTOOL_STAT(field, mac_stats, field, 		\
			  u64, efx_get_u64_stat)

#define EFX_ETHTOOL_UINT_NIC_STAT(name)				\
	EFX_ETHTOOL_STAT(name, nic, n_##name,			\
			 unsigned int, efx_get_uint_stat)

#define EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(field)		\
	EFX_ETHTOOL_STAT(field, nic, field,			\
			 atomic_t, efx_get_atomic_stat)

#define EFX_ETHTOOL_UINT_CHANNEL_STAT(field)			\
	EFX_ETHTOOL_STAT(field, channel, n_##field,		\
			 unsigned int, efx_get_uint_stat)

static struct efx_ethtool_stat efx_ethtool_stats[] = {
	EFX_ETHTOOL_U64_MAC_STAT(tx_bytes),
	EFX_ETHTOOL_U64_MAC_STAT(tx_good_bytes),
	EFX_ETHTOOL_U64_MAC_STAT(tx_bad_bytes),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_packets),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_bad),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_pause),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_control),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_unicast),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_multicast),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_broadcast),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_lt64),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_64),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_65_to_127),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_128_to_255),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_256_to_511),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_512_to_1023),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_1024_to_15xx),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_15xx_to_jumbo),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_gtjumbo),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_collision),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_single_collision),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_multiple_collision),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_excessive_collision),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_deferred),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_late_collision),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_excessive_deferred),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_non_tcpudp),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_mac_src_error),
	EFX_ETHTOOL_ULONG_MAC_STAT(tx_ip_src_error),
	EFX_ETHTOOL_U64_MAC_STAT(rx_bytes),
	EFX_ETHTOOL_U64_MAC_STAT(rx_good_bytes),
	EFX_ETHTOOL_U64_MAC_STAT(rx_bad_bytes),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_packets),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_good),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_pause),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_control),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_unicast),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_multicast),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_broadcast),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_lt64),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_64),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_65_to_127),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_128_to_255),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_256_to_511),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_512_to_1023),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_1024_to_15xx),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_15xx_to_jumbo),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_gtjumbo),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_lt64),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_64_to_15xx),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_15xx_to_jumbo),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_gtjumbo),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_overflow),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_missed),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_false_carrier),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_symbol_error),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_align_error),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_length_error),
	EFX_ETHTOOL_ULONG_MAC_STAT(rx_internal_error),
	EFX_ETHTOOL_UINT_NIC_STAT(rx_nodesc_drop_cnt),
	EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(rx_reset),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tobe_disc),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_ip_hdr_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tcp_udp_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_frm_trunc),
};

/* Number of ethtool statistics */
#define EFX_ETHTOOL_NUM_STATS ARRAY_SIZE(efx_ethtool_stats)

#define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB

/**************************************************************************
 *
 * Ethtool operations
 *
 **************************************************************************
 */

/* Identify device by flashing LEDs */
static int efx_ethtool_phys_id(struct net_device *net_dev, u32 count)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	efx->board_info.blink(efx, 1);
	set_current_state(TASK_INTERRUPTIBLE);
	if (count)
		schedule_timeout(count * HZ);
	else
		schedule();
	efx->board_info.blink(efx, 0);
	return 0;
}

/* This must be called with rtnl_lock held. */
int efx_ethtool_get_settings(struct net_device *net_dev,
			     struct ethtool_cmd *ecmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	mutex_lock(&efx->mac_lock);
	efx->phy_op->get_settings(efx, ecmd);
	mutex_unlock(&efx->mac_lock);

	/* Falcon GMAC does not support 1000Mbps HD */
	ecmd->supported &= ~SUPPORTED_1000baseT_Half;

	return 0;
}

/* This must be called with rtnl_lock held. */
int efx_ethtool_set_settings(struct net_device *net_dev,
			     struct ethtool_cmd *ecmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	if (EFX_WORKAROUND_13963(efx) && !ecmd->autoneg)
		return -EINVAL;

	/* Falcon GMAC does not support 1000Mbps HD */
	if (ecmd->speed == SPEED_1000 && ecmd->duplex != DUPLEX_FULL) {
		EFX_LOG(efx, "rejecting unsupported 1000Mbps HD"
			" setting\n");
		return -EINVAL;
	}

	mutex_lock(&efx->mac_lock);
	rc = efx->phy_op->set_settings(efx, ecmd);
	mutex_unlock(&efx->mac_lock);
	if (!rc)
		efx_reconfigure_port(efx);

	return rc;
}

static void efx_ethtool_get_drvinfo(struct net_device *net_dev,
				    struct ethtool_drvinfo *info)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	strlcpy(info->driver, EFX_DRIVER_NAME, sizeof(info->driver));
	strlcpy(info->version, EFX_DRIVER_VERSION, sizeof(info->version));
	strlcpy(info->bus_info, pci_name(efx->pci_dev), sizeof(info->bus_info));
}

/**
 * efx_fill_test - fill in an individual self-test entry
 * @test_index:		Index of the test
 * @strings:		Ethtool strings, or %NULL
 * @data:		Ethtool test results, or %NULL
 * @test:		Pointer to test result (used only if data != %NULL)
 * @unit_format:	Unit name format (e.g. "chan\%d")
 * @unit_id:		Unit id (e.g. 0 for "chan0")
 * @test_format:	Test name format (e.g. "loopback.\%s.tx.sent")
 * @test_id:		Test id (e.g. "PHYXS" for "loopback.PHYXS.tx_sent")
 *
 * Fill in an individual self-test entry.
 */
static void efx_fill_test(unsigned int test_index,
			  struct ethtool_string *strings, u64 *data,
			  int *test, const char *unit_format, int unit_id,
			  const char *test_format, const char *test_id)
{
	struct ethtool_string unit_str, test_str;

	/* Fill data value, if applicable */
	if (data)
		data[test_index] = *test;

	/* Fill string, if applicable */
	if (strings) {
		if (strchr(unit_format, '%'))
			snprintf(unit_str.name, sizeof(unit_str.name),
				 unit_format, unit_id);
		else
			strcpy(unit_str.name, unit_format);
		snprintf(test_str.name, sizeof(test_str.name),
			 test_format, test_id);
		snprintf(strings[test_index].name,
			 sizeof(strings[test_index].name),
			 "%-6s %-24s", unit_str.name, test_str.name);
	}
}

#define EFX_CHANNEL_NAME(_channel) "chan%d", _channel->channel
#define EFX_TX_QUEUE_NAME(_tx_queue) "txq%d", _tx_queue->queue
#define EFX_RX_QUEUE_NAME(_rx_queue) "rxq%d", _rx_queue->queue
#define EFX_LOOPBACK_NAME(_mode, _counter)			\
	"loopback.%s." _counter, LOOPBACK_MODE_NAME(mode)

/**
 * efx_fill_loopback_test - fill in a block of loopback self-test entries
 * @efx:		Efx NIC
 * @lb_tests:		Efx loopback self-test results structure
 * @mode:		Loopback test mode
 * @test_index:		Starting index of the test
 * @strings:		Ethtool strings, or %NULL
 * @data:		Ethtool test results, or %NULL
 */
static int efx_fill_loopback_test(struct efx_nic *efx,
				  struct efx_loopback_self_tests *lb_tests,
				  enum efx_loopback_mode mode,
				  unsigned int test_index,
				  struct ethtool_string *strings, u64 *data)
{
	struct efx_tx_queue *tx_queue;

	efx_for_each_tx_queue(tx_queue, efx) {
		efx_fill_test(test_index++, strings, data,
			      &lb_tests->tx_sent[tx_queue->queue],
			      EFX_TX_QUEUE_NAME(tx_queue),
			      EFX_LOOPBACK_NAME(mode, "tx_sent"));
		efx_fill_test(test_index++, strings, data,
			      &lb_tests->tx_done[tx_queue->queue],
			      EFX_TX_QUEUE_NAME(tx_queue),
			      EFX_LOOPBACK_NAME(mode, "tx_done"));
	}
	efx_fill_test(test_index++, strings, data,
		      &lb_tests->rx_good,
		      "rx", 0,
		      EFX_LOOPBACK_NAME(mode, "rx_good"));
	efx_fill_test(test_index++, strings, data,
		      &lb_tests->rx_bad,
		      "rx", 0,
		      EFX_LOOPBACK_NAME(mode, "rx_bad"));

	return test_index;
}

/**
 * efx_ethtool_fill_self_tests - get self-test details
 * @efx:		Efx NIC
 * @tests:		Efx self-test results structure, or %NULL
 * @strings:		Ethtool strings, or %NULL
 * @data:		Ethtool test results, or %NULL
 */
static int efx_ethtool_fill_self_tests(struct efx_nic *efx,
				       struct efx_self_tests *tests,
				       struct ethtool_string *strings,
				       u64 *data)
{
	struct efx_channel *channel;
	unsigned int n = 0;
	enum efx_loopback_mode mode;

	efx_fill_test(n++, strings, data, &tests->mii,
		      "core", 0, "mii", NULL);
	efx_fill_test(n++, strings, data, &tests->nvram,
		      "core", 0, "nvram", NULL);
	efx_fill_test(n++, strings, data, &tests->interrupt,
		      "core", 0, "interrupt", NULL);

	/* Event queues */
	efx_for_each_channel(channel, efx) {
		efx_fill_test(n++, strings, data,
			      &tests->eventq_dma[channel->channel],
			      EFX_CHANNEL_NAME(channel),
			      "eventq.dma", NULL);
		efx_fill_test(n++, strings, data,
			      &tests->eventq_int[channel->channel],
			      EFX_CHANNEL_NAME(channel),
			      "eventq.int", NULL);
		efx_fill_test(n++, strings, data,
			      &tests->eventq_poll[channel->channel],
			      EFX_CHANNEL_NAME(channel),
			      "eventq.poll", NULL);
	}

	efx_fill_test(n++, strings, data, &tests->registers,
		      "core", 0, "registers", NULL);
	efx_fill_test(n++, strings, data, &tests->phy,
		      "phy", 0, "bist", NULL);

	/* Loopback tests */
	for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) {
		if (!(efx->loopback_modes & (1 << mode)))
			continue;
		n = efx_fill_loopback_test(efx,
					   &tests->loopback[mode], mode, n,
					   strings, data);
	}

	return n;
}

static int efx_ethtool_get_sset_count(struct net_device *net_dev,
				      int string_set)
{
	switch (string_set) {
	case ETH_SS_STATS:
		return EFX_ETHTOOL_NUM_STATS;
	case ETH_SS_TEST:
		return efx_ethtool_fill_self_tests(netdev_priv(net_dev),
						   NULL, NULL, NULL);
	default:
		return -EINVAL;
	}
}

static void efx_ethtool_get_strings(struct net_device *net_dev,
				    u32 string_set, u8 *strings)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct ethtool_string *ethtool_strings =
		(struct ethtool_string *)strings;
	int i;

	switch (string_set) {
	case ETH_SS_STATS:
		for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++)
			strncpy(ethtool_strings[i].name,
				efx_ethtool_stats[i].name,
				sizeof(ethtool_strings[i].name));
		break;
	case ETH_SS_TEST:
		efx_ethtool_fill_self_tests(efx, NULL,
					    ethtool_strings, NULL);
		break;
	default:
		/* No other string sets */
		break;
	}
}

static void efx_ethtool_get_stats(struct net_device *net_dev,
				  struct ethtool_stats *stats,
				  u64 *data)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_mac_stats *mac_stats = &efx->mac_stats;
	struct efx_ethtool_stat *stat;
	struct efx_channel *channel;
	int i;

	EFX_BUG_ON_PARANOID(stats->n_stats != EFX_ETHTOOL_NUM_STATS);

	/* Update MAC and NIC statistics */
	dev_get_stats(net_dev);

	/* Fill detailed statistics buffer */
	for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++) {
		stat = &efx_ethtool_stats[i];
		switch (stat->source) {
		case EFX_ETHTOOL_STAT_SOURCE_mac_stats:
			data[i] = stat->get_stat((void *)mac_stats +
						 stat->offset);
			break;
		case EFX_ETHTOOL_STAT_SOURCE_nic:
			data[i] = stat->get_stat((void *)efx + stat->offset);
			break;
		case EFX_ETHTOOL_STAT_SOURCE_channel:
			data[i] = 0;
			efx_for_each_channel(channel, efx)
				data[i] += stat->get_stat((void *)channel +
							  stat->offset);
			break;
		}
	}
}

static int efx_ethtool_set_rx_csum(struct net_device *net_dev, u32 enable)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	/* No way to stop the hardware doing the checks; we just
	 * ignore the result.
	 */
	efx->rx_checksum_enabled = !!enable;

	return 0;
}

static u32 efx_ethtool_get_rx_csum(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	return efx->rx_checksum_enabled;
}

static void efx_ethtool_self_test(struct net_device *net_dev,
				  struct ethtool_test *test, u64 *data)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_self_tests efx_tests;
	int offline, already_up;
	int rc;

	ASSERT_RTNL();
	if (efx->state != STATE_RUNNING) {
		rc = -EIO;
		goto fail1;
	}

	/* We need rx buffers and interrupts. */
	already_up = (efx->net_dev->flags & IFF_UP);
	if (!already_up) {
		rc = dev_open(efx->net_dev);
		if (rc) {
			EFX_ERR(efx, "failed opening device.\n");
			goto fail2;
		}
	}

	memset(&efx_tests, 0, sizeof(efx_tests));
	offline = (test->flags & ETH_TEST_FL_OFFLINE);

	/* Perform online self tests first */
	rc = efx_online_test(efx, &efx_tests);
	if (rc)
		goto out;

	/* Perform offline tests only if online tests passed */
	if (offline)
		rc = efx_offline_test(efx, &efx_tests,
				      efx->loopback_modes);

 out:
	if (!already_up)
		dev_close(efx->net_dev);

	EFX_LOG(efx, "%s all %sline self-tests\n",
		rc == 0 ? "passed" : "failed", offline ? "off" : "on");

 fail2:
 fail1:
	/* Fill ethtool results structures */
	efx_ethtool_fill_self_tests(efx, &efx_tests, NULL, data);
	if (rc)
		test->flags |= ETH_TEST_FL_FAILED;
}

/* Restart autonegotiation */
static int efx_ethtool_nway_reset(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	return mii_nway_restart(&efx->mii);
}

static u32 efx_ethtool_get_link(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	return efx->link_up;
}

static int efx_ethtool_get_eeprom_len(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_spi_device *spi = efx->spi_eeprom;

	if (!spi)
		return 0;
	return min(spi->size, EFX_EEPROM_BOOTCONFIG_END) -
		min(spi->size, EFX_EEPROM_BOOTCONFIG_START);
}

static int efx_ethtool_get_eeprom(struct net_device *net_dev,
				  struct ethtool_eeprom *eeprom, u8 *buf)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_spi_device *spi = efx->spi_eeprom;
	size_t len;
	int rc;

	rc = mutex_lock_interruptible(&efx->spi_lock);
	if (rc)
		return rc;
	rc = falcon_spi_read(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
			     eeprom->len, &len, buf);
	mutex_unlock(&efx->spi_lock);

	eeprom->magic = EFX_ETHTOOL_EEPROM_MAGIC;
	eeprom->len = len;
	return rc;
}

static int efx_ethtool_set_eeprom(struct net_device *net_dev,
				  struct ethtool_eeprom *eeprom, u8 *buf)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_spi_device *spi = efx->spi_eeprom;
	size_t len;
	int rc;

	if (eeprom->magic != EFX_ETHTOOL_EEPROM_MAGIC)
		return -EINVAL;

	rc = mutex_lock_interruptible(&efx->spi_lock);
	if (rc)
		return rc;
	rc = falcon_spi_write(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
			      eeprom->len, &len, buf);
	mutex_unlock(&efx->spi_lock);

	eeprom->len = len;
	return rc;
}

static int efx_ethtool_get_coalesce(struct net_device *net_dev,
				    struct ethtool_coalesce *coalesce)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_tx_queue *tx_queue;
	struct efx_rx_queue *rx_queue;
	struct efx_channel *channel;

	memset(coalesce, 0, sizeof(*coalesce));

	/* Find lowest IRQ moderation across all used TX queues */
	coalesce->tx_coalesce_usecs_irq = ~((u32) 0);
	efx_for_each_tx_queue(tx_queue, efx) {
		channel = tx_queue->channel;
		if (channel->irq_moderation < coalesce->tx_coalesce_usecs_irq) {
			if (channel->used_flags != EFX_USED_BY_RX_TX)
				coalesce->tx_coalesce_usecs_irq =
					channel->irq_moderation;
			else
				coalesce->tx_coalesce_usecs_irq = 0;
		}
	}

	/* Find lowest IRQ moderation across all used RX queues */
	coalesce->rx_coalesce_usecs_irq = ~((u32) 0);
	efx_for_each_rx_queue(rx_queue, efx) {
		channel = rx_queue->channel;
		if (channel->irq_moderation < coalesce->rx_coalesce_usecs_irq)
			coalesce->rx_coalesce_usecs_irq =
				channel->irq_moderation;
	}

	return 0;
}

/* Set coalescing parameters
 * The difficulties occur for shared channels
 */
static int efx_ethtool_set_coalesce(struct net_device *net_dev,
				    struct ethtool_coalesce *coalesce)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_channel *channel;
	struct efx_tx_queue *tx_queue;
	unsigned tx_usecs, rx_usecs;

	if (coalesce->use_adaptive_rx_coalesce ||
	    coalesce->use_adaptive_tx_coalesce)
		return -EOPNOTSUPP;

	if (coalesce->rx_coalesce_usecs || coalesce->tx_coalesce_usecs) {
		EFX_ERR(efx, "invalid coalescing setting. "
			"Only rx/tx_coalesce_usecs_irq are supported\n");
		return -EOPNOTSUPP;
	}

	rx_usecs = coalesce->rx_coalesce_usecs_irq;
	tx_usecs = coalesce->tx_coalesce_usecs_irq;

	/* If the channel is shared only allow RX parameters to be set */
	efx_for_each_tx_queue(tx_queue, efx) {
		if ((tx_queue->channel->used_flags == EFX_USED_BY_RX_TX) &&
		    tx_usecs) {
			EFX_ERR(efx, "Channel is shared. "
				"Only RX coalescing may be set\n");
			return -EOPNOTSUPP;
		}
	}

	efx_init_irq_moderation(efx, tx_usecs, rx_usecs);

	/* Reset channel to pick up new moderation value.  Note that
	 * this may change the value of the irq_moderation field
	 * (e.g. to allow for hardware timer granularity).
	 */
	efx_for_each_channel(channel, efx)
		falcon_set_int_moderation(channel);

	return 0;
}

static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
				      struct ethtool_pauseparam *pause)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	enum efx_fc_type wanted_fc;
	bool reset;

	wanted_fc = ((pause->rx_pause ? EFX_FC_RX : 0) |
		     (pause->tx_pause ? EFX_FC_TX : 0) |
		     (pause->autoneg ? EFX_FC_AUTO : 0));

	if ((wanted_fc & EFX_FC_TX) && !(wanted_fc & EFX_FC_RX)) {
		EFX_LOG(efx, "Flow control unsupported: tx ON rx OFF\n");
		return -EINVAL;
	}

	if (!(efx->phy_op->mmds & DEV_PRESENT_BIT(MDIO_MMD_AN)) &&
	    (wanted_fc & EFX_FC_AUTO)) {
		EFX_LOG(efx, "PHY does not support flow control "
			"autonegotiation\n");
		return -EINVAL;
	}

	/* TX flow control may automatically turn itself off if the
	 * link partner (intermittently) stops responding to pause
	 * frames. There isn't any indication that this has happened,
	 * so the best we do is leave it up to the user to spot this
	 * and fix it be cycling transmit flow control on this end. */
	reset = (wanted_fc & EFX_FC_TX) && !(efx->wanted_fc & EFX_FC_TX);
	if (EFX_WORKAROUND_11482(efx) && reset) {
		if (falcon_rev(efx) >= FALCON_REV_B0) {
			/* Recover by resetting the EM block */
			if (efx->link_up)
				falcon_drain_tx_fifo(efx);
		} else {
			/* Schedule a reset to recover */
			efx_schedule_reset(efx, RESET_TYPE_INVISIBLE);
		}
	}

	/* Try to push the pause parameters */
	mutex_lock(&efx->mac_lock);

	efx->wanted_fc = wanted_fc;
	mdio_clause45_set_pause(efx);
	__efx_reconfigure_port(efx);

	mutex_unlock(&efx->mac_lock);

	return 0;
}

static void efx_ethtool_get_pauseparam(struct net_device *net_dev,
				       struct ethtool_pauseparam *pause)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	pause->rx_pause = !!(efx->wanted_fc & EFX_FC_RX);
	pause->tx_pause = !!(efx->wanted_fc & EFX_FC_TX);
	pause->autoneg = !!(efx->wanted_fc & EFX_FC_AUTO);
}


struct ethtool_ops efx_ethtool_ops = {
	.get_settings		= efx_ethtool_get_settings,
	.set_settings		= efx_ethtool_set_settings,
	.get_drvinfo		= efx_ethtool_get_drvinfo,
	.nway_reset		= efx_ethtool_nway_reset,
	.get_link		= efx_ethtool_get_link,
	.get_eeprom_len		= efx_ethtool_get_eeprom_len,
	.get_eeprom		= efx_ethtool_get_eeprom,
	.set_eeprom		= efx_ethtool_set_eeprom,
	.get_coalesce		= efx_ethtool_get_coalesce,
	.set_coalesce		= efx_ethtool_set_coalesce,
	.get_pauseparam         = efx_ethtool_get_pauseparam,
	.set_pauseparam         = efx_ethtool_set_pauseparam,
	.get_rx_csum		= efx_ethtool_get_rx_csum,
	.set_rx_csum		= efx_ethtool_set_rx_csum,
	.get_tx_csum		= ethtool_op_get_tx_csum,
	.set_tx_csum		= ethtool_op_set_tx_csum,
	.get_sg			= ethtool_op_get_sg,
	.set_sg			= ethtool_op_set_sg,
	.get_tso		= ethtool_op_get_tso,
	.set_tso		= ethtool_op_set_tso,
	.get_flags		= ethtool_op_get_flags,
	.set_flags		= ethtool_op_set_flags,
	.get_sset_count		= efx_ethtool_get_sset_count,
	.self_test		= efx_ethtool_self_test,
	.get_strings		= efx_ethtool_get_strings,
	.phys_id		= efx_ethtool_phys_id,
	.get_ethtool_stats	= efx_ethtool_get_stats,
};
OpenPOWER on IntegriCloud