xref: /openbmc/linux/drivers/s390/net/qeth_ethtool.c (revision abe9af53)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright IBM Corp. 2018
4  */
5 
6 #define KMSG_COMPONENT "qeth"
7 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
8 
9 #include <linux/ethtool.h>
10 #include "qeth_core.h"
11 
12 
13 #define QETH_TXQ_STAT(_name, _stat) { \
14 	.name = _name, \
15 	.offset = offsetof(struct qeth_out_q_stats, _stat) \
16 }
17 
18 #define QETH_CARD_STAT(_name, _stat) { \
19 	.name = _name, \
20 	.offset = offsetof(struct qeth_card_stats, _stat) \
21 }
22 
23 struct qeth_stats {
24 	char name[ETH_GSTRING_LEN];
25 	unsigned int offset;
26 };
27 
28 static const struct qeth_stats txq_stats[] = {
29 	QETH_TXQ_STAT("IO buffers", bufs),
30 	QETH_TXQ_STAT("IO buffer elements", buf_elements),
31 	QETH_TXQ_STAT("packed IO buffers", bufs_pack),
32 	QETH_TXQ_STAT("skbs", tx_packets),
33 	QETH_TXQ_STAT("packed skbs", skbs_pack),
34 	QETH_TXQ_STAT("SG skbs", skbs_sg),
35 	QETH_TXQ_STAT("HW csum skbs", skbs_csum),
36 	QETH_TXQ_STAT("TSO skbs", skbs_tso),
37 	QETH_TXQ_STAT("linearized skbs", skbs_linearized),
38 	QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail),
39 	QETH_TXQ_STAT("TSO bytes", tso_bytes),
40 	QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
41 	QETH_TXQ_STAT("Queue stopped", stopped),
42 	QETH_TXQ_STAT("Doorbell", doorbell),
43 	QETH_TXQ_STAT("IRQ for frames", coal_frames),
44 	QETH_TXQ_STAT("Completion yield", completion_yield),
45 	QETH_TXQ_STAT("Completion timer", completion_timer),
46 };
47 
48 static const struct qeth_stats card_stats[] = {
49 	QETH_CARD_STAT("rx0 IO buffers", rx_bufs),
50 	QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum),
51 	QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
52 	QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
53 	QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
54 	QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
55 	QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
56 	QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt),
57 };
58 
59 #define TXQ_STATS_LEN	ARRAY_SIZE(txq_stats)
60 #define CARD_STATS_LEN	ARRAY_SIZE(card_stats)
61 
62 static void qeth_add_stat_data(u64 **dst, void *src,
63 			       const struct qeth_stats stats[],
64 			       unsigned int size)
65 {
66 	unsigned int i;
67 	char *stat;
68 
69 	for (i = 0; i < size; i++) {
70 		stat = (char *)src + stats[i].offset;
71 		**dst = *(u64 *)stat;
72 		(*dst)++;
73 	}
74 }
75 
76 static void qeth_add_stat_strings(u8 **data, const char *prefix,
77 				  const struct qeth_stats stats[],
78 				  unsigned int size)
79 {
80 	unsigned int i;
81 
82 	for (i = 0; i < size; i++) {
83 		snprintf(*data, ETH_GSTRING_LEN, "%s%s", prefix, stats[i].name);
84 		*data += ETH_GSTRING_LEN;
85 	}
86 }
87 
88 static int qeth_get_sset_count(struct net_device *dev, int stringset)
89 {
90 	struct qeth_card *card = dev->ml_priv;
91 
92 	switch (stringset) {
93 	case ETH_SS_STATS:
94 		return CARD_STATS_LEN +
95 		       card->qdio.no_out_queues * TXQ_STATS_LEN;
96 	default:
97 		return -EINVAL;
98 	}
99 }
100 
101 static void qeth_get_ethtool_stats(struct net_device *dev,
102 				   struct ethtool_stats *stats, u64 *data)
103 {
104 	struct qeth_card *card = dev->ml_priv;
105 	unsigned int i;
106 
107 	qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN);
108 	for (i = 0; i < card->qdio.no_out_queues; i++)
109 		qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats,
110 				   txq_stats, TXQ_STATS_LEN);
111 }
112 
113 static void __qeth_set_coalesce(struct net_device *dev,
114 				struct qeth_qdio_out_q *queue,
115 				struct ethtool_coalesce *coal)
116 {
117 	WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
118 	WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
119 
120 	if (coal->tx_coalesce_usecs &&
121 	    netif_running(dev) &&
122 	    !qeth_out_queue_is_empty(queue))
123 		qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
124 }
125 
126 static int qeth_set_coalesce(struct net_device *dev,
127 			     struct ethtool_coalesce *coal)
128 {
129 	struct qeth_card *card = dev->ml_priv;
130 	struct qeth_qdio_out_q *queue;
131 	unsigned int i;
132 
133 	if (!IS_IQD(card))
134 		return -EOPNOTSUPP;
135 
136 	if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
137 		return -EINVAL;
138 
139 	qeth_for_each_output_queue(card, queue, i)
140 		__qeth_set_coalesce(dev, queue, coal);
141 
142 	return 0;
143 }
144 
145 static void qeth_get_ringparam(struct net_device *dev,
146 			       struct ethtool_ringparam *param)
147 {
148 	struct qeth_card *card = dev->ml_priv;
149 
150 	param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
151 	param->rx_mini_max_pending = 0;
152 	param->rx_jumbo_max_pending = 0;
153 	param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
154 
155 	param->rx_pending = card->qdio.in_buf_pool.buf_count;
156 	param->rx_mini_pending = 0;
157 	param->rx_jumbo_pending = 0;
158 	param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
159 }
160 
161 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
162 {
163 	struct qeth_card *card = dev->ml_priv;
164 	char prefix[ETH_GSTRING_LEN] = "";
165 	unsigned int i;
166 
167 	switch (stringset) {
168 	case ETH_SS_STATS:
169 		qeth_add_stat_strings(&data, prefix, card_stats,
170 				      CARD_STATS_LEN);
171 		for (i = 0; i < card->qdio.no_out_queues; i++) {
172 			snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
173 			qeth_add_stat_strings(&data, prefix, txq_stats,
174 					      TXQ_STATS_LEN);
175 		}
176 		break;
177 	default:
178 		WARN_ON(1);
179 		break;
180 	}
181 }
182 
183 static void qeth_get_drvinfo(struct net_device *dev,
184 			     struct ethtool_drvinfo *info)
185 {
186 	struct qeth_card *card = dev->ml_priv;
187 
188 	strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
189 		sizeof(info->driver));
190 	strlcpy(info->fw_version, card->info.mcl_level,
191 		sizeof(info->fw_version));
192 	snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
193 		 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
194 }
195 
196 static void qeth_get_channels(struct net_device *dev,
197 			      struct ethtool_channels *channels)
198 {
199 	struct qeth_card *card = dev->ml_priv;
200 
201 	channels->max_rx = dev->num_rx_queues;
202 	channels->max_tx = card->qdio.no_out_queues;
203 	channels->max_other = 0;
204 	channels->max_combined = 0;
205 	channels->rx_count = dev->real_num_rx_queues;
206 	channels->tx_count = dev->real_num_tx_queues;
207 	channels->other_count = 0;
208 	channels->combined_count = 0;
209 }
210 
211 static int qeth_set_channels(struct net_device *dev,
212 			     struct ethtool_channels *channels)
213 {
214 	struct qeth_priv *priv = netdev_priv(dev);
215 	struct qeth_card *card = dev->ml_priv;
216 	int rc;
217 
218 	if (channels->rx_count == 0 || channels->tx_count == 0)
219 		return -EINVAL;
220 	if (channels->tx_count > card->qdio.no_out_queues)
221 		return -EINVAL;
222 
223 	/* Prio-queueing needs all TX queues: */
224 	if (qeth_uses_tx_prio_queueing(card))
225 		return -EPERM;
226 
227 	if (IS_IQD(card)) {
228 		if (channels->tx_count < QETH_IQD_MIN_TXQ)
229 			return -EINVAL;
230 
231 		/* Reject downgrade while running. It could push displaced
232 		 * ucast flows onto txq0, which is reserved for mcast.
233 		 */
234 		if (netif_running(dev) &&
235 		    channels->tx_count < dev->real_num_tx_queues)
236 			return -EPERM;
237 	}
238 
239 	rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
240 	if (!rc)
241 		priv->tx_wanted_queues = channels->tx_count;
242 
243 	return rc;
244 }
245 
246 static int qeth_get_ts_info(struct net_device *dev,
247 			    struct ethtool_ts_info *info)
248 {
249 	struct qeth_card *card = dev->ml_priv;
250 
251 	if (!IS_IQD(card))
252 		return -EOPNOTSUPP;
253 
254 	return ethtool_op_get_ts_info(dev, info);
255 }
256 
257 static int qeth_get_tunable(struct net_device *dev,
258 			    const struct ethtool_tunable *tuna, void *data)
259 {
260 	struct qeth_priv *priv = netdev_priv(dev);
261 
262 	switch (tuna->id) {
263 	case ETHTOOL_RX_COPYBREAK:
264 		*(u32 *)data = priv->rx_copybreak;
265 		return 0;
266 	default:
267 		return -EOPNOTSUPP;
268 	}
269 }
270 
271 static int qeth_set_tunable(struct net_device *dev,
272 			    const struct ethtool_tunable *tuna,
273 			    const void *data)
274 {
275 	struct qeth_priv *priv = netdev_priv(dev);
276 
277 	switch (tuna->id) {
278 	case ETHTOOL_RX_COPYBREAK:
279 		WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
280 		return 0;
281 	default:
282 		return -EOPNOTSUPP;
283 	}
284 }
285 
286 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
287 				       struct ethtool_coalesce *coal)
288 {
289 	struct qeth_card *card = dev->ml_priv;
290 	struct qeth_qdio_out_q *queue;
291 
292 	if (!IS_IQD(card))
293 		return -EOPNOTSUPP;
294 
295 	if (__queue >= card->qdio.no_out_queues)
296 		return -EINVAL;
297 
298 	queue = card->qdio.out_qs[__queue];
299 
300 	coal->tx_coalesce_usecs = queue->coalesce_usecs;
301 	coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
302 	return 0;
303 }
304 
305 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
306 				       struct ethtool_coalesce *coal)
307 {
308 	struct qeth_card *card = dev->ml_priv;
309 
310 	if (!IS_IQD(card))
311 		return -EOPNOTSUPP;
312 
313 	if (queue >= card->qdio.no_out_queues)
314 		return -EINVAL;
315 
316 	if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
317 		return -EINVAL;
318 
319 	__qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
320 	return 0;
321 }
322 
323 /* Helper function to fill 'advertising' and 'supported' which are the same. */
324 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
325 /* Always advertise and support all speeds up to specified, and only one     */
326 /* specified port type.							     */
327 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
328 				int maxspeed, int porttype)
329 {
330 	ethtool_link_ksettings_zero_link_mode(cmd, supported);
331 	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
332 	ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
333 
334 	ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
335 	ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
336 
337 	switch (porttype) {
338 	case PORT_TP:
339 		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
340 		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
341 		break;
342 	case PORT_FIBRE:
343 		ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
344 		ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
345 		break;
346 	default:
347 		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
348 		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
349 		WARN_ON_ONCE(1);
350 	}
351 
352 	/* partially does fall through, to also select lower speeds */
353 	switch (maxspeed) {
354 	case SPEED_25000:
355 		ethtool_link_ksettings_add_link_mode(cmd, supported,
356 						     25000baseSR_Full);
357 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
358 						     25000baseSR_Full);
359 		break;
360 	case SPEED_10000:
361 		ethtool_link_ksettings_add_link_mode(cmd, supported,
362 						     10000baseT_Full);
363 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
364 						     10000baseT_Full);
365 		fallthrough;
366 	case SPEED_1000:
367 		ethtool_link_ksettings_add_link_mode(cmd, supported,
368 						     1000baseT_Full);
369 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
370 						     1000baseT_Full);
371 		ethtool_link_ksettings_add_link_mode(cmd, supported,
372 						     1000baseT_Half);
373 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
374 						     1000baseT_Half);
375 		fallthrough;
376 	case SPEED_100:
377 		ethtool_link_ksettings_add_link_mode(cmd, supported,
378 						     100baseT_Full);
379 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
380 						     100baseT_Full);
381 		ethtool_link_ksettings_add_link_mode(cmd, supported,
382 						     100baseT_Half);
383 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
384 						     100baseT_Half);
385 		fallthrough;
386 	case SPEED_10:
387 		ethtool_link_ksettings_add_link_mode(cmd, supported,
388 						     10baseT_Full);
389 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
390 						     10baseT_Full);
391 		ethtool_link_ksettings_add_link_mode(cmd, supported,
392 						     10baseT_Half);
393 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
394 						     10baseT_Half);
395 		break;
396 	default:
397 		ethtool_link_ksettings_add_link_mode(cmd, supported,
398 						     10baseT_Full);
399 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
400 						     10baseT_Full);
401 		ethtool_link_ksettings_add_link_mode(cmd, supported,
402 						     10baseT_Half);
403 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
404 						     10baseT_Half);
405 		WARN_ON_ONCE(1);
406 	}
407 }
408 
409 
410 static int qeth_get_link_ksettings(struct net_device *netdev,
411 				   struct ethtool_link_ksettings *cmd)
412 {
413 	struct qeth_card *card = netdev->ml_priv;
414 	enum qeth_link_types link_type;
415 	struct carrier_info carrier_info;
416 	int rc;
417 
418 	if (IS_IQD(card) || IS_VM_NIC(card))
419 		link_type = QETH_LINK_TYPE_10GBIT_ETH;
420 	else
421 		link_type = card->info.link_type;
422 
423 	cmd->base.duplex = DUPLEX_FULL;
424 	cmd->base.autoneg = AUTONEG_ENABLE;
425 	cmd->base.phy_address = 0;
426 	cmd->base.mdio_support = 0;
427 	cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
428 	cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
429 
430 	switch (link_type) {
431 	case QETH_LINK_TYPE_FAST_ETH:
432 	case QETH_LINK_TYPE_LANE_ETH100:
433 		cmd->base.speed = SPEED_100;
434 		cmd->base.port = PORT_TP;
435 		break;
436 	case QETH_LINK_TYPE_GBIT_ETH:
437 	case QETH_LINK_TYPE_LANE_ETH1000:
438 		cmd->base.speed = SPEED_1000;
439 		cmd->base.port = PORT_FIBRE;
440 		break;
441 	case QETH_LINK_TYPE_10GBIT_ETH:
442 		cmd->base.speed = SPEED_10000;
443 		cmd->base.port = PORT_FIBRE;
444 		break;
445 	case QETH_LINK_TYPE_25GBIT_ETH:
446 		cmd->base.speed = SPEED_25000;
447 		cmd->base.port = PORT_FIBRE;
448 		break;
449 	default:
450 		cmd->base.speed = SPEED_10;
451 		cmd->base.port = PORT_TP;
452 	}
453 	qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
454 
455 	/* Check if we can obtain more accurate information.	 */
456 	/* If QUERY_CARD_INFO command is not supported or fails, */
457 	/* just return the heuristics that was filled above.	 */
458 	rc = qeth_query_card_info(card, &carrier_info);
459 	if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
460 		return 0;
461 	if (rc) /* report error from the hardware operation */
462 		return rc;
463 	/* on success, fill in the information got from the hardware */
464 
465 	netdev_dbg(netdev,
466 	"card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
467 			carrier_info.card_type,
468 			carrier_info.port_mode,
469 			carrier_info.port_speed);
470 
471 	/* Update attributes for which we've obtained more authoritative */
472 	/* information, leave the rest the way they where filled above.  */
473 	switch (carrier_info.card_type) {
474 	case CARD_INFO_TYPE_1G_COPPER_A:
475 	case CARD_INFO_TYPE_1G_COPPER_B:
476 		cmd->base.port = PORT_TP;
477 		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
478 		break;
479 	case CARD_INFO_TYPE_1G_FIBRE_A:
480 	case CARD_INFO_TYPE_1G_FIBRE_B:
481 		cmd->base.port = PORT_FIBRE;
482 		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
483 		break;
484 	case CARD_INFO_TYPE_10G_FIBRE_A:
485 	case CARD_INFO_TYPE_10G_FIBRE_B:
486 		cmd->base.port = PORT_FIBRE;
487 		qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
488 		break;
489 	}
490 
491 	switch (carrier_info.port_mode) {
492 	case CARD_INFO_PORTM_FULLDUPLEX:
493 		cmd->base.duplex = DUPLEX_FULL;
494 		break;
495 	case CARD_INFO_PORTM_HALFDUPLEX:
496 		cmd->base.duplex = DUPLEX_HALF;
497 		break;
498 	}
499 
500 	switch (carrier_info.port_speed) {
501 	case CARD_INFO_PORTS_10M:
502 		cmd->base.speed = SPEED_10;
503 		break;
504 	case CARD_INFO_PORTS_100M:
505 		cmd->base.speed = SPEED_100;
506 		break;
507 	case CARD_INFO_PORTS_1G:
508 		cmd->base.speed = SPEED_1000;
509 		break;
510 	case CARD_INFO_PORTS_10G:
511 		cmd->base.speed = SPEED_10000;
512 		break;
513 	case CARD_INFO_PORTS_25G:
514 		cmd->base.speed = SPEED_25000;
515 		break;
516 	}
517 
518 	return 0;
519 }
520 
521 const struct ethtool_ops qeth_ethtool_ops = {
522 	.supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
523 				     ETHTOOL_COALESCE_TX_MAX_FRAMES,
524 	.get_link = ethtool_op_get_link,
525 	.set_coalesce = qeth_set_coalesce,
526 	.get_ringparam = qeth_get_ringparam,
527 	.get_strings = qeth_get_strings,
528 	.get_ethtool_stats = qeth_get_ethtool_stats,
529 	.get_sset_count = qeth_get_sset_count,
530 	.get_drvinfo = qeth_get_drvinfo,
531 	.get_channels = qeth_get_channels,
532 	.set_channels = qeth_set_channels,
533 	.get_ts_info = qeth_get_ts_info,
534 	.get_tunable = qeth_get_tunable,
535 	.set_tunable = qeth_set_tunable,
536 	.get_per_queue_coalesce = qeth_get_per_queue_coalesce,
537 	.set_per_queue_coalesce = qeth_set_per_queue_coalesce,
538 	.get_link_ksettings = qeth_get_link_ksettings,
539 };
540 
541 const struct ethtool_ops qeth_osn_ethtool_ops = {
542 	.get_strings = qeth_get_strings,
543 	.get_ethtool_stats = qeth_get_ethtool_stats,
544 	.get_sset_count = qeth_get_sset_count,
545 	.get_drvinfo = qeth_get_drvinfo,
546 };
547