summaryrefslogtreecommitdiffstats
path: root/drivers/s390/net/qeth_ethtool.c
blob: b5caa723326ea4d5caa1783a5060e79b46b3c7f0 (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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright IBM Corp. 2018
 */

#define KMSG_COMPONENT "qeth"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/ethtool.h>
#include "qeth_core.h"


#define QETH_TXQ_STAT(_name, _stat) { \
	.name = _name, \
	.offset = offsetof(struct qeth_out_q_stats, _stat) \
}

#define QETH_CARD_STAT(_name, _stat) { \
	.name = _name, \
	.offset = offsetof(struct qeth_card_stats, _stat) \
}

struct qeth_stats {
	char name[ETH_GSTRING_LEN];
	unsigned int offset;
};

static const struct qeth_stats txq_stats[] = {
	QETH_TXQ_STAT("IO buffers", bufs),
	QETH_TXQ_STAT("IO buffer elements", buf_elements),
	QETH_TXQ_STAT("packed IO buffers", bufs_pack),
	QETH_TXQ_STAT("skbs", tx_packets),
	QETH_TXQ_STAT("packed skbs", skbs_pack),
	QETH_TXQ_STAT("SG skbs", skbs_sg),
	QETH_TXQ_STAT("HW csum skbs", skbs_csum),
	QETH_TXQ_STAT("TSO skbs", skbs_tso),
	QETH_TXQ_STAT("linearized skbs", skbs_linearized),
	QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail),
	QETH_TXQ_STAT("TSO bytes", tso_bytes),
	QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
	QETH_TXQ_STAT("Queue stopped", stopped),
	QETH_TXQ_STAT("Doorbell", doorbell),
	QETH_TXQ_STAT("IRQ for frames", coal_frames),
	QETH_TXQ_STAT("Completion yield", completion_yield),
	QETH_TXQ_STAT("Completion timer", completion_timer),
};

static const struct qeth_stats card_stats[] = {
	QETH_CARD_STAT("rx0 IO buffers", rx_bufs),
	QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum),
	QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
	QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
	QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
	QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
	QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
	QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt),
};

#define TXQ_STATS_LEN	ARRAY_SIZE(txq_stats)
#define CARD_STATS_LEN	ARRAY_SIZE(card_stats)

static void qeth_add_stat_data(u64 **dst, void *src,
			       const struct qeth_stats stats[],
			       unsigned int size)
{
	unsigned int i;
	char *stat;

	for (i = 0; i < size; i++) {
		stat = (char *)src + stats[i].offset;
		**dst = *(u64 *)stat;
		(*dst)++;
	}
}

static void qeth_add_stat_strings(u8 **data, const char *prefix,
				  const struct qeth_stats stats[],
				  unsigned int size)
{
	unsigned int i;

	for (i = 0; i < size; i++) {
		snprintf(*data, ETH_GSTRING_LEN, "%s%s", prefix, stats[i].name);
		*data += ETH_GSTRING_LEN;
	}
}

static int qeth_get_sset_count(struct net_device *dev, int stringset)
{
	struct qeth_card *card = dev->ml_priv;

	switch (stringset) {
	case ETH_SS_STATS:
		return CARD_STATS_LEN +
		       card->qdio.no_out_queues * TXQ_STATS_LEN;
	default:
		return -EINVAL;
	}
}

static void qeth_get_ethtool_stats(struct net_device *dev,
				   struct ethtool_stats *stats, u64 *data)
{
	struct qeth_card *card = dev->ml_priv;
	unsigned int i;

	qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN);
	for (i = 0; i < card->qdio.no_out_queues; i++)
		qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats,
				   txq_stats, TXQ_STATS_LEN);
}

static void __qeth_set_coalesce(struct net_device *dev,
				struct qeth_qdio_out_q *queue,
				struct ethtool_coalesce *coal)
{
	WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
	WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);

	if (coal->tx_coalesce_usecs &&
	    netif_running(dev) &&
	    !qeth_out_queue_is_empty(queue))
		qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
}

static int qeth_set_coalesce(struct net_device *dev,
			     struct ethtool_coalesce *coal)
{
	struct qeth_card *card = dev->ml_priv;
	struct qeth_qdio_out_q *queue;
	unsigned int i;

	if (!IS_IQD(card))
		return -EOPNOTSUPP;

	if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
		return -EINVAL;

	qeth_for_each_output_queue(card, queue, i)
		__qeth_set_coalesce(dev, queue, coal);

	return 0;
}

static void qeth_get_ringparam(struct net_device *dev,
			       struct ethtool_ringparam *param)
{
	struct qeth_card *card = dev->ml_priv;

	param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
	param->rx_mini_max_pending = 0;
	param->rx_jumbo_max_pending = 0;
	param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;

	param->rx_pending = card->qdio.in_buf_pool.buf_count;
	param->rx_mini_pending = 0;
	param->rx_jumbo_pending = 0;
	param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
}

static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
	struct qeth_card *card = dev->ml_priv;
	char prefix[ETH_GSTRING_LEN] = "";
	unsigned int i;

	switch (stringset) {
	case ETH_SS_STATS:
		qeth_add_stat_strings(&data, prefix, card_stats,
				      CARD_STATS_LEN);
		for (i = 0; i < card->qdio.no_out_queues; i++) {
			snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
			qeth_add_stat_strings(&data, prefix, txq_stats,
					      TXQ_STATS_LEN);
		}
		break;
	default:
		WARN_ON(1);
		break;
	}
}

static void qeth_get_drvinfo(struct net_device *dev,
			     struct ethtool_drvinfo *info)
{
	struct qeth_card *card = dev->ml_priv;

	strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
		sizeof(info->driver));
	strlcpy(info->fw_version, card->info.mcl_level,
		sizeof(info->fw_version));
	snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
		 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
}

static void qeth_get_channels(struct net_device *dev,
			      struct ethtool_channels *channels)
{
	struct qeth_card *card = dev->ml_priv;

	channels->max_rx = dev->num_rx_queues;
	channels->max_tx = card->qdio.no_out_queues;
	channels->max_other = 0;
	channels->max_combined = 0;
	channels->rx_count = dev->real_num_rx_queues;
	channels->tx_count = dev->real_num_tx_queues;
	channels->other_count = 0;
	channels->combined_count = 0;
}

static int qeth_set_channels(struct net_device *dev,
			     struct ethtool_channels *channels)
{
	struct qeth_priv *priv = netdev_priv(dev);
	struct qeth_card *card = dev->ml_priv;
	int rc;

	if (channels->rx_count == 0 || channels->tx_count == 0)
		return -EINVAL;
	if (channels->tx_count > card->qdio.no_out_queues)
		return -EINVAL;

	/* Prio-queueing needs all TX queues: */
	if (qeth_uses_tx_prio_queueing(card))
		return -EPERM;

	if (IS_IQD(card)) {
		if (channels->tx_count < QETH_IQD_MIN_TXQ)
			return -EINVAL;

		/* Reject downgrade while running. It could push displaced
		 * ucast flows onto txq0, which is reserved for mcast.
		 */
		if (netif_running(dev) &&
		    channels->tx_count < dev->real_num_tx_queues)
			return -EPERM;
	}

	rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
	if (!rc)
		priv->tx_wanted_queues = channels->tx_count;

	return rc;
}

static int qeth_get_ts_info(struct net_device *dev,
			    struct ethtool_ts_info *info)
{
	struct qeth_card *card = dev->ml_priv;

	if (!IS_IQD(card))
		return -EOPNOTSUPP;

	return ethtool_op_get_ts_info(dev, info);
}

static int qeth_get_tunable(struct net_device *dev,
			    const struct ethtool_tunable *tuna, void *data)
{
	struct qeth_priv *priv = netdev_priv(dev);

	switch (tuna->id) {
	case ETHTOOL_RX_COPYBREAK:
		*(u32 *)data = priv->rx_copybreak;
		return 0;
	default:
		return -EOPNOTSUPP;
	}
}

static int qeth_set_tunable(struct net_device *dev,
			    const struct ethtool_tunable *tuna,
			    const void *data)
{
	struct qeth_priv *priv = netdev_priv(dev);

	switch (tuna->id) {
	case ETHTOOL_RX_COPYBREAK:
		WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
		return 0;
	default:
		return -EOPNOTSUPP;
	}
}

static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
				       struct ethtool_coalesce *coal)
{
	struct qeth_card *card = dev->ml_priv;
	struct qeth_qdio_out_q *queue;

	if (!IS_IQD(card))
		return -EOPNOTSUPP;

	if (__queue >= card->qdio.no_out_queues)
		return -EINVAL;

	queue = card->qdio.out_qs[__queue];

	coal->tx_coalesce_usecs = queue->coalesce_usecs;
	coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
	return 0;
}

static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
				       struct ethtool_coalesce *coal)
{
	struct qeth_card *card = dev->ml_priv;

	if (!IS_IQD(card))
		return -EOPNOTSUPP;

	if (queue >= card->qdio.no_out_queues)
		return -EINVAL;

	if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
		return -EINVAL;

	__qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
	return 0;
}

/* Helper function to fill 'advertising' and 'supported' which are the same. */
/* Autoneg and full-duplex are supported and advertised unconditionally.     */
/* Always advertise and support all speeds up to specified, and only one     */
/* specified port type.							     */
static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
				int maxspeed, int porttype)
{
	ethtool_link_ksettings_zero_link_mode(cmd, supported);
	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
	ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);

	ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
	ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);

	switch (porttype) {
	case PORT_TP:
		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
		break;
	case PORT_FIBRE:
		ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
		break;
	default:
		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
		WARN_ON_ONCE(1);
	}

	/* partially does fall through, to also select lower speeds */
	switch (maxspeed) {
	case SPEED_25000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     25000baseSR_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     25000baseSR_Full);
		break;
	case SPEED_10000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10000baseT_Full);
		fallthrough;
	case SPEED_1000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     1000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     1000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     1000baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     1000baseT_Half);
		fallthrough;
	case SPEED_100:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     100baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     100baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     100baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     100baseT_Half);
		fallthrough;
	case SPEED_10:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Half);
		break;
	default:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Half);
		WARN_ON_ONCE(1);
	}
}


static int qeth_get_link_ksettings(struct net_device *netdev,
				   struct ethtool_link_ksettings *cmd)
{
	struct qeth_card *card = netdev->ml_priv;
	enum qeth_link_types link_type;
	struct carrier_info carrier_info;
	int rc;

	if (IS_IQD(card) || IS_VM_NIC(card))
		link_type = QETH_LINK_TYPE_10GBIT_ETH;
	else
		link_type = card->info.link_type;

	cmd->base.duplex = DUPLEX_FULL;
	cmd->base.autoneg = AUTONEG_ENABLE;
	cmd->base.phy_address = 0;
	cmd->base.mdio_support = 0;
	cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
	cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;

	switch (link_type) {
	case QETH_LINK_TYPE_FAST_ETH:
	case QETH_LINK_TYPE_LANE_ETH100:
		cmd->base.speed = SPEED_100;
		cmd->base.port = PORT_TP;
		break;
	case QETH_LINK_TYPE_GBIT_ETH:
	case QETH_LINK_TYPE_LANE_ETH1000:
		cmd->base.speed = SPEED_1000;
		cmd->base.port = PORT_FIBRE;
		break;
	case QETH_LINK_TYPE_10GBIT_ETH:
		cmd->base.speed = SPEED_10000;
		cmd->base.port = PORT_FIBRE;
		break;
	case QETH_LINK_TYPE_25GBIT_ETH:
		cmd->base.speed = SPEED_25000;
		cmd->base.port = PORT_FIBRE;
		break;
	default:
		cmd->base.speed = SPEED_10;
		cmd->base.port = PORT_TP;
	}
	qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);

	/* Check if we can obtain more accurate information.	 */
	/* If QUERY_CARD_INFO command is not supported or fails, */
	/* just return the heuristics that was filled above.	 */
	rc = qeth_query_card_info(card, &carrier_info);
	if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
		return 0;
	if (rc) /* report error from the hardware operation */
		return rc;
	/* on success, fill in the information got from the hardware */

	netdev_dbg(netdev,
	"card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
			carrier_info.card_type,
			carrier_info.port_mode,
			carrier_info.port_speed);

	/* Update attributes for which we've obtained more authoritative */
	/* information, leave the rest the way they where filled above.  */
	switch (carrier_info.card_type) {
	case CARD_INFO_TYPE_1G_COPPER_A:
	case CARD_INFO_TYPE_1G_COPPER_B:
		cmd->base.port = PORT_TP;
		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
		break;
	case CARD_INFO_TYPE_1G_FIBRE_A:
	case CARD_INFO_TYPE_1G_FIBRE_B:
		cmd->base.port = PORT_FIBRE;
		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
		break;
	case CARD_INFO_TYPE_10G_FIBRE_A:
	case CARD_INFO_TYPE_10G_FIBRE_B:
		cmd->base.port = PORT_FIBRE;
		qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
		break;
	}

	switch (carrier_info.port_mode) {
	case CARD_INFO_PORTM_FULLDUPLEX:
		cmd->base.duplex = DUPLEX_FULL;
		break;
	case CARD_INFO_PORTM_HALFDUPLEX:
		cmd->base.duplex = DUPLEX_HALF;
		break;
	}

	switch (carrier_info.port_speed) {
	case CARD_INFO_PORTS_10M:
		cmd->base.speed = SPEED_10;
		break;
	case CARD_INFO_PORTS_100M:
		cmd->base.speed = SPEED_100;
		break;
	case CARD_INFO_PORTS_1G:
		cmd->base.speed = SPEED_1000;
		break;
	case CARD_INFO_PORTS_10G:
		cmd->base.speed = SPEED_10000;
		break;
	case CARD_INFO_PORTS_25G:
		cmd->base.speed = SPEED_25000;
		break;
	}

	return 0;
}

const struct ethtool_ops qeth_ethtool_ops = {
	.supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
				     ETHTOOL_COALESCE_TX_MAX_FRAMES,
	.get_link = ethtool_op_get_link,
	.set_coalesce = qeth_set_coalesce,
	.get_ringparam = qeth_get_ringparam,
	.get_strings = qeth_get_strings,
	.get_ethtool_stats = qeth_get_ethtool_stats,
	.get_sset_count = qeth_get_sset_count,
	.get_drvinfo = qeth_get_drvinfo,
	.get_channels = qeth_get_channels,
	.set_channels = qeth_set_channels,
	.get_ts_info = qeth_get_ts_info,
	.get_tunable = qeth_get_tunable,
	.set_tunable = qeth_set_tunable,
	.get_per_queue_coalesce = qeth_get_per_queue_coalesce,
	.set_per_queue_coalesce = qeth_set_per_queue_coalesce,
	.get_link_ksettings = qeth_get_link_ksettings,
};

const struct ethtool_ops qeth_osn_ethtool_ops = {
	.get_strings = qeth_get_strings,
	.get_ethtool_stats = qeth_get_ethtool_stats,
	.get_sset_count = qeth_get_sset_count,
	.get_drvinfo = qeth_get_drvinfo,
};