1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright IBM Corp. 2018
4 */
5
6#define pr_fmt(fmt) "qeth: " fmt
7
8#include <linux/ethtool.h>
9#include "qeth_core.h"
10
11
12#define QETH_TXQ_STAT(_name, _stat) { \
13 .name = _name, \
14 .offset = offsetof(struct qeth_out_q_stats, _stat) \
15}
16
17#define QETH_CARD_STAT(_name, _stat) { \
18 .name = _name, \
19 .offset = offsetof(struct qeth_card_stats, _stat) \
20}
21
22struct qeth_stats {
23 char name[ETH_GSTRING_LEN];
24 unsigned int offset;
25};
26
27static const struct qeth_stats txq_stats[] = {
28 QETH_TXQ_STAT("IO buffers", bufs),
29 QETH_TXQ_STAT("IO buffer elements", buf_elements),
30 QETH_TXQ_STAT("packed IO buffers", bufs_pack),
31 QETH_TXQ_STAT("skbs", tx_packets),
32 QETH_TXQ_STAT("packed skbs", skbs_pack),
33 QETH_TXQ_STAT("SG skbs", skbs_sg),
34 QETH_TXQ_STAT("HW csum skbs", skbs_csum),
35 QETH_TXQ_STAT("TSO skbs", skbs_tso),
36 QETH_TXQ_STAT("linearized skbs", skbs_linearized),
37 QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail),
38 QETH_TXQ_STAT("TSO bytes", tso_bytes),
39 QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
40 QETH_TXQ_STAT("Queue stopped", stopped),
41 QETH_TXQ_STAT("Doorbell", doorbell),
42 QETH_TXQ_STAT("IRQ for frames", coal_frames),
43 QETH_TXQ_STAT("Completion IRQ", completion_irq),
44 QETH_TXQ_STAT("Completion yield", completion_yield),
45 QETH_TXQ_STAT("Completion timer", completion_timer),
46};
47
48static 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
62static 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
76static 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 ethtool_sprintf(data, fmt: "%s%s", prefix, stats[i].name);
84}
85
86static int qeth_get_sset_count(struct net_device *dev, int stringset)
87{
88 struct qeth_card *card = dev->ml_priv;
89
90 switch (stringset) {
91 case ETH_SS_STATS:
92 return CARD_STATS_LEN +
93 card->qdio.no_out_queues * TXQ_STATS_LEN;
94 default:
95 return -EINVAL;
96 }
97}
98
99static void qeth_get_ethtool_stats(struct net_device *dev,
100 struct ethtool_stats *stats, u64 *data)
101{
102 struct qeth_card *card = dev->ml_priv;
103 unsigned int i;
104
105 qeth_add_stat_data(dst: &data, src: &card->stats, stats: card_stats, CARD_STATS_LEN);
106 for (i = 0; i < card->qdio.no_out_queues; i++)
107 qeth_add_stat_data(dst: &data, src: &card->qdio.out_qs[i]->stats,
108 stats: txq_stats, TXQ_STATS_LEN);
109}
110
111static void __qeth_set_coalesce(struct net_device *dev,
112 struct qeth_qdio_out_q *queue,
113 struct ethtool_coalesce *coal)
114{
115 WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
116 WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
117
118 if (coal->tx_coalesce_usecs &&
119 netif_running(dev) &&
120 !qeth_out_queue_is_empty(queue))
121 qeth_tx_arm_timer(queue, usecs: coal->tx_coalesce_usecs);
122}
123
124static int qeth_set_coalesce(struct net_device *dev,
125 struct ethtool_coalesce *coal,
126 struct kernel_ethtool_coalesce *kernel_coal,
127 struct netlink_ext_ack *extack)
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
145static void qeth_get_ringparam(struct net_device *dev,
146 struct ethtool_ringparam *param,
147 struct kernel_ethtool_ringparam *kernel_param,
148 struct netlink_ext_ack *extack)
149{
150 struct qeth_card *card = dev->ml_priv;
151
152 param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
153 param->rx_mini_max_pending = 0;
154 param->rx_jumbo_max_pending = 0;
155 param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
156
157 param->rx_pending = card->qdio.in_buf_pool.buf_count;
158 param->rx_mini_pending = 0;
159 param->rx_jumbo_pending = 0;
160 param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
161}
162
163static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
164{
165 struct qeth_card *card = dev->ml_priv;
166 char prefix[ETH_GSTRING_LEN] = "";
167 unsigned int i;
168
169 switch (stringset) {
170 case ETH_SS_STATS:
171 qeth_add_stat_strings(data: &data, prefix, stats: card_stats,
172 CARD_STATS_LEN);
173 for (i = 0; i < card->qdio.no_out_queues; i++) {
174 scnprintf(buf: prefix, ETH_GSTRING_LEN, fmt: "tx%u ", i);
175 qeth_add_stat_strings(data: &data, prefix, stats: txq_stats,
176 TXQ_STATS_LEN);
177 }
178 break;
179 default:
180 WARN_ON(1);
181 break;
182 }
183}
184
185static void qeth_get_drvinfo(struct net_device *dev,
186 struct ethtool_drvinfo *info)
187{
188 struct qeth_card *card = dev->ml_priv;
189
190 strscpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
191 sizeof(info->driver));
192 strscpy(info->fw_version, card->info.mcl_level,
193 sizeof(info->fw_version));
194 scnprintf(buf: info->bus_info, size: sizeof(info->bus_info), fmt: "%s/%s/%s",
195 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
196}
197
198static void qeth_get_channels(struct net_device *dev,
199 struct ethtool_channels *channels)
200{
201 struct qeth_card *card = dev->ml_priv;
202
203 channels->max_rx = dev->num_rx_queues;
204 channels->max_tx = card->qdio.no_out_queues;
205 channels->max_other = 0;
206 channels->max_combined = 0;
207 channels->rx_count = dev->real_num_rx_queues;
208 channels->tx_count = dev->real_num_tx_queues;
209 channels->other_count = 0;
210 channels->combined_count = 0;
211}
212
213static int qeth_set_channels(struct net_device *dev,
214 struct ethtool_channels *channels)
215{
216 struct qeth_priv *priv = netdev_priv(dev);
217 struct qeth_card *card = dev->ml_priv;
218 int rc;
219
220 if (channels->rx_count == 0 || channels->tx_count == 0)
221 return -EINVAL;
222 if (channels->tx_count > card->qdio.no_out_queues)
223 return -EINVAL;
224
225 /* Prio-queueing needs all TX queues: */
226 if (qeth_uses_tx_prio_queueing(card))
227 return -EPERM;
228
229 if (IS_IQD(card)) {
230 if (channels->tx_count < QETH_IQD_MIN_TXQ)
231 return -EINVAL;
232
233 /* Reject downgrade while running. It could push displaced
234 * ucast flows onto txq0, which is reserved for mcast.
235 */
236 if (netif_running(dev) &&
237 channels->tx_count < dev->real_num_tx_queues)
238 return -EPERM;
239 }
240
241 rc = qeth_set_real_num_tx_queues(card, count: channels->tx_count);
242 if (!rc)
243 priv->tx_wanted_queues = channels->tx_count;
244
245 return rc;
246}
247
248static int qeth_get_ts_info(struct net_device *dev,
249 struct kernel_ethtool_ts_info *info)
250{
251 struct qeth_card *card = dev->ml_priv;
252
253 if (!IS_IQD(card))
254 return -EOPNOTSUPP;
255
256 return ethtool_op_get_ts_info(dev, eti: info);
257}
258
259static int qeth_get_tunable(struct net_device *dev,
260 const struct ethtool_tunable *tuna, void *data)
261{
262 struct qeth_priv *priv = netdev_priv(dev);
263
264 switch (tuna->id) {
265 case ETHTOOL_RX_COPYBREAK:
266 *(u32 *)data = priv->rx_copybreak;
267 return 0;
268 default:
269 return -EOPNOTSUPP;
270 }
271}
272
273static int qeth_set_tunable(struct net_device *dev,
274 const struct ethtool_tunable *tuna,
275 const void *data)
276{
277 struct qeth_priv *priv = netdev_priv(dev);
278
279 switch (tuna->id) {
280 case ETHTOOL_RX_COPYBREAK:
281 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
282 return 0;
283 default:
284 return -EOPNOTSUPP;
285 }
286}
287
288static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
289 struct ethtool_coalesce *coal)
290{
291 struct qeth_card *card = dev->ml_priv;
292 struct qeth_qdio_out_q *queue;
293
294 if (!IS_IQD(card))
295 return -EOPNOTSUPP;
296
297 if (__queue >= card->qdio.no_out_queues)
298 return -EINVAL;
299
300 queue = card->qdio.out_qs[__queue];
301
302 coal->tx_coalesce_usecs = queue->coalesce_usecs;
303 coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
304 return 0;
305}
306
307static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
308 struct ethtool_coalesce *coal)
309{
310 struct qeth_card *card = dev->ml_priv;
311
312 if (!IS_IQD(card))
313 return -EOPNOTSUPP;
314
315 if (queue >= card->qdio.no_out_queues)
316 return -EINVAL;
317
318 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
319 return -EINVAL;
320
321 __qeth_set_coalesce(dev, queue: card->qdio.out_qs[queue], coal);
322 return 0;
323}
324
325/* Helper function to fill 'advertising' and 'supported' which are the same. */
326/* Autoneg and full-duplex are supported and advertised unconditionally. */
327/* Always advertise and support all speeds up to specified, and only one */
328/* specified port type. */
329static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
330 enum qeth_link_mode link_mode)
331{
332 ethtool_link_ksettings_zero_link_mode(cmd, supported);
333 ethtool_link_ksettings_zero_link_mode(cmd, advertising);
334 ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
335
336 ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
337 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
338
339 switch (cmd->base.port) {
340 case PORT_TP:
341 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
342 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
343
344 switch (cmd->base.speed) {
345 case SPEED_10000:
346 ethtool_link_ksettings_add_link_mode(cmd, supported,
347 10000baseT_Full);
348 ethtool_link_ksettings_add_link_mode(cmd, advertising,
349 10000baseT_Full);
350 fallthrough;
351 case SPEED_1000:
352 ethtool_link_ksettings_add_link_mode(cmd, supported,
353 1000baseT_Full);
354 ethtool_link_ksettings_add_link_mode(cmd, advertising,
355 1000baseT_Full);
356 ethtool_link_ksettings_add_link_mode(cmd, supported,
357 1000baseT_Half);
358 ethtool_link_ksettings_add_link_mode(cmd, advertising,
359 1000baseT_Half);
360 fallthrough;
361 case SPEED_100:
362 ethtool_link_ksettings_add_link_mode(cmd, supported,
363 100baseT_Full);
364 ethtool_link_ksettings_add_link_mode(cmd, advertising,
365 100baseT_Full);
366 ethtool_link_ksettings_add_link_mode(cmd, supported,
367 100baseT_Half);
368 ethtool_link_ksettings_add_link_mode(cmd, advertising,
369 100baseT_Half);
370 fallthrough;
371 case SPEED_10:
372 ethtool_link_ksettings_add_link_mode(cmd, supported,
373 10baseT_Full);
374 ethtool_link_ksettings_add_link_mode(cmd, advertising,
375 10baseT_Full);
376 ethtool_link_ksettings_add_link_mode(cmd, supported,
377 10baseT_Half);
378 ethtool_link_ksettings_add_link_mode(cmd, advertising,
379 10baseT_Half);
380 break;
381 default:
382 break;
383 }
384
385 break;
386 case PORT_FIBRE:
387 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
388 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
389
390 switch (cmd->base.speed) {
391 case SPEED_25000:
392 ethtool_link_ksettings_add_link_mode(cmd, supported,
393 25000baseSR_Full);
394 ethtool_link_ksettings_add_link_mode(cmd, advertising,
395 25000baseSR_Full);
396 break;
397 case SPEED_10000:
398 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
399 ethtool_link_ksettings_add_link_mode(cmd, supported,
400 10000baseLR_Full);
401 ethtool_link_ksettings_add_link_mode(cmd, advertising,
402 10000baseLR_Full);
403 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
404 ethtool_link_ksettings_add_link_mode(cmd, supported,
405 10000baseSR_Full);
406 ethtool_link_ksettings_add_link_mode(cmd, advertising,
407 10000baseSR_Full);
408 }
409 break;
410 case SPEED_1000:
411 ethtool_link_ksettings_add_link_mode(cmd, supported,
412 1000baseX_Full);
413 ethtool_link_ksettings_add_link_mode(cmd, advertising,
414 1000baseX_Full);
415 break;
416 default:
417 break;
418 }
419
420 break;
421 default:
422 break;
423 }
424}
425
426static int qeth_get_link_ksettings(struct net_device *netdev,
427 struct ethtool_link_ksettings *cmd)
428{
429 struct qeth_card *card = netdev->ml_priv;
430
431 QETH_CARD_TEXT(card, 4, "ethtglks");
432 cmd->base.speed = card->info.link_info.speed;
433 cmd->base.duplex = card->info.link_info.duplex;
434 cmd->base.port = card->info.link_info.port;
435 cmd->base.autoneg = AUTONEG_ENABLE;
436 cmd->base.phy_address = 0;
437 cmd->base.mdio_support = 0;
438 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
439 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
440
441 qeth_set_ethtool_link_modes(cmd, link_mode: card->info.link_info.link_mode);
442
443 return 0;
444}
445
446const struct ethtool_ops qeth_ethtool_ops = {
447 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
448 ETHTOOL_COALESCE_TX_MAX_FRAMES,
449 .get_link = ethtool_op_get_link,
450 .set_coalesce = qeth_set_coalesce,
451 .get_ringparam = qeth_get_ringparam,
452 .get_strings = qeth_get_strings,
453 .get_ethtool_stats = qeth_get_ethtool_stats,
454 .get_sset_count = qeth_get_sset_count,
455 .get_drvinfo = qeth_get_drvinfo,
456 .get_channels = qeth_get_channels,
457 .set_channels = qeth_set_channels,
458 .get_ts_info = qeth_get_ts_info,
459 .get_tunable = qeth_get_tunable,
460 .set_tunable = qeth_set_tunable,
461 .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
462 .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
463 .get_link_ksettings = qeth_get_link_ksettings,
464};
465

source code of linux/drivers/s390/net/qeth_ethtool.c