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
qeth_add_stat_data(u64 ** dst,void * src,const struct qeth_stats stats[],unsigned int size)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
qeth_add_stat_strings(u8 ** data,const char * prefix,const struct qeth_stats stats[],unsigned int size)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
qeth_get_sset_count(struct net_device * dev,int stringset)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
qeth_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)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
__qeth_set_coalesce(struct net_device * dev,struct qeth_qdio_out_q * queue,struct ethtool_coalesce * coal)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
qeth_set_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)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
qeth_get_ringparam(struct net_device * dev,struct ethtool_ringparam * param)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
qeth_get_strings(struct net_device * dev,u32 stringset,u8 * data)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
qeth_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)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
qeth_get_channels(struct net_device * dev,struct ethtool_channels * channels)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
qeth_set_channels(struct net_device * dev,struct ethtool_channels * channels)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
qeth_get_ts_info(struct net_device * dev,struct ethtool_ts_info * info)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
qeth_get_tunable(struct net_device * dev,const struct ethtool_tunable * tuna,void * data)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
qeth_set_tunable(struct net_device * dev,const struct ethtool_tunable * tuna,const void * data)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
qeth_get_per_queue_coalesce(struct net_device * dev,u32 __queue,struct ethtool_coalesce * coal)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
qeth_set_per_queue_coalesce(struct net_device * dev,u32 queue,struct ethtool_coalesce * coal)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. */
qeth_set_ethtool_link_modes(struct ethtool_link_ksettings * cmd,enum qeth_link_mode link_mode)327 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
328 enum qeth_link_mode link_mode)
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 (cmd->base.port) {
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
342 switch (cmd->base.speed) {
343 case SPEED_10000:
344 ethtool_link_ksettings_add_link_mode(cmd, supported,
345 10000baseT_Full);
346 ethtool_link_ksettings_add_link_mode(cmd, advertising,
347 10000baseT_Full);
348 fallthrough;
349 case SPEED_1000:
350 ethtool_link_ksettings_add_link_mode(cmd, supported,
351 1000baseT_Full);
352 ethtool_link_ksettings_add_link_mode(cmd, advertising,
353 1000baseT_Full);
354 ethtool_link_ksettings_add_link_mode(cmd, supported,
355 1000baseT_Half);
356 ethtool_link_ksettings_add_link_mode(cmd, advertising,
357 1000baseT_Half);
358 fallthrough;
359 case SPEED_100:
360 ethtool_link_ksettings_add_link_mode(cmd, supported,
361 100baseT_Full);
362 ethtool_link_ksettings_add_link_mode(cmd, advertising,
363 100baseT_Full);
364 ethtool_link_ksettings_add_link_mode(cmd, supported,
365 100baseT_Half);
366 ethtool_link_ksettings_add_link_mode(cmd, advertising,
367 100baseT_Half);
368 fallthrough;
369 case SPEED_10:
370 ethtool_link_ksettings_add_link_mode(cmd, supported,
371 10baseT_Full);
372 ethtool_link_ksettings_add_link_mode(cmd, advertising,
373 10baseT_Full);
374 ethtool_link_ksettings_add_link_mode(cmd, supported,
375 10baseT_Half);
376 ethtool_link_ksettings_add_link_mode(cmd, advertising,
377 10baseT_Half);
378 break;
379 default:
380 break;
381 }
382
383 break;
384 case PORT_FIBRE:
385 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
386 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
387
388 switch (cmd->base.speed) {
389 case SPEED_25000:
390 ethtool_link_ksettings_add_link_mode(cmd, supported,
391 25000baseSR_Full);
392 ethtool_link_ksettings_add_link_mode(cmd, advertising,
393 25000baseSR_Full);
394 break;
395 case SPEED_10000:
396 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
397 ethtool_link_ksettings_add_link_mode(cmd, supported,
398 10000baseLR_Full);
399 ethtool_link_ksettings_add_link_mode(cmd, advertising,
400 10000baseLR_Full);
401 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
402 ethtool_link_ksettings_add_link_mode(cmd, supported,
403 10000baseSR_Full);
404 ethtool_link_ksettings_add_link_mode(cmd, advertising,
405 10000baseSR_Full);
406 }
407 break;
408 case SPEED_1000:
409 ethtool_link_ksettings_add_link_mode(cmd, supported,
410 1000baseX_Full);
411 ethtool_link_ksettings_add_link_mode(cmd, advertising,
412 1000baseX_Full);
413 break;
414 default:
415 break;
416 }
417
418 break;
419 default:
420 break;
421 }
422 }
423
qeth_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)424 static int qeth_get_link_ksettings(struct net_device *netdev,
425 struct ethtool_link_ksettings *cmd)
426 {
427 struct qeth_card *card = netdev->ml_priv;
428 struct qeth_link_info link_info;
429
430 cmd->base.speed = card->info.link_info.speed;
431 cmd->base.duplex = card->info.link_info.duplex;
432 cmd->base.port = card->info.link_info.port;
433 cmd->base.autoneg = AUTONEG_ENABLE;
434 cmd->base.phy_address = 0;
435 cmd->base.mdio_support = 0;
436 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
437 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
438
439 /* Check if we can obtain more accurate information. */
440 if (!qeth_query_card_info(card, &link_info)) {
441 if (link_info.speed != SPEED_UNKNOWN)
442 cmd->base.speed = link_info.speed;
443 if (link_info.duplex != DUPLEX_UNKNOWN)
444 cmd->base.duplex = link_info.duplex;
445 if (link_info.port != PORT_OTHER)
446 cmd->base.port = link_info.port;
447 }
448
449 qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
450
451 return 0;
452 }
453
454 const struct ethtool_ops qeth_ethtool_ops = {
455 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
456 ETHTOOL_COALESCE_TX_MAX_FRAMES,
457 .get_link = ethtool_op_get_link,
458 .set_coalesce = qeth_set_coalesce,
459 .get_ringparam = qeth_get_ringparam,
460 .get_strings = qeth_get_strings,
461 .get_ethtool_stats = qeth_get_ethtool_stats,
462 .get_sset_count = qeth_get_sset_count,
463 .get_drvinfo = qeth_get_drvinfo,
464 .get_channels = qeth_get_channels,
465 .set_channels = qeth_set_channels,
466 .get_ts_info = qeth_get_ts_info,
467 .get_tunable = qeth_get_tunable,
468 .set_tunable = qeth_set_tunable,
469 .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
470 .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
471 .get_link_ksettings = qeth_get_link_ksettings,
472 };
473
474 const struct ethtool_ops qeth_osn_ethtool_ops = {
475 .get_strings = qeth_get_strings,
476 .get_ethtool_stats = qeth_get_ethtool_stats,
477 .get_sset_count = qeth_get_sset_count,
478 .get_drvinfo = qeth_get_drvinfo,
479 };
480