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 IRQ", completion_irq),
45 QETH_TXQ_STAT("Completion yield", completion_yield),
46 QETH_TXQ_STAT("Completion timer", completion_timer),
47 };
48
49 static const struct qeth_stats card_stats[] = {
50 QETH_CARD_STAT("rx0 IO buffers", rx_bufs),
51 QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum),
52 QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
53 QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
54 QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
55 QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
56 QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
57 QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt),
58 };
59
60 #define TXQ_STATS_LEN ARRAY_SIZE(txq_stats)
61 #define CARD_STATS_LEN ARRAY_SIZE(card_stats)
62
qeth_add_stat_data(u64 ** dst,void * src,const struct qeth_stats stats[],unsigned int size)63 static void qeth_add_stat_data(u64 **dst, void *src,
64 const struct qeth_stats stats[],
65 unsigned int size)
66 {
67 unsigned int i;
68 char *stat;
69
70 for (i = 0; i < size; i++) {
71 stat = (char *)src + stats[i].offset;
72 **dst = *(u64 *)stat;
73 (*dst)++;
74 }
75 }
76
qeth_add_stat_strings(u8 ** data,const char * prefix,const struct qeth_stats stats[],unsigned int size)77 static void qeth_add_stat_strings(u8 **data, const char *prefix,
78 const struct qeth_stats stats[],
79 unsigned int size)
80 {
81 unsigned int i;
82
83 for (i = 0; i < size; i++)
84 ethtool_sprintf(data, "%s%s", prefix, stats[i].name);
85 }
86
qeth_get_sset_count(struct net_device * dev,int stringset)87 static int qeth_get_sset_count(struct net_device *dev, int stringset)
88 {
89 struct qeth_card *card = dev->ml_priv;
90
91 switch (stringset) {
92 case ETH_SS_STATS:
93 return CARD_STATS_LEN +
94 card->qdio.no_out_queues * TXQ_STATS_LEN;
95 default:
96 return -EINVAL;
97 }
98 }
99
qeth_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)100 static void qeth_get_ethtool_stats(struct net_device *dev,
101 struct ethtool_stats *stats, u64 *data)
102 {
103 struct qeth_card *card = dev->ml_priv;
104 unsigned int i;
105
106 qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN);
107 for (i = 0; i < card->qdio.no_out_queues; i++)
108 qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats,
109 txq_stats, TXQ_STATS_LEN);
110 }
111
__qeth_set_coalesce(struct net_device * dev,struct qeth_qdio_out_q * queue,struct ethtool_coalesce * coal)112 static void __qeth_set_coalesce(struct net_device *dev,
113 struct qeth_qdio_out_q *queue,
114 struct ethtool_coalesce *coal)
115 {
116 WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
117 WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
118
119 if (coal->tx_coalesce_usecs &&
120 netif_running(dev) &&
121 !qeth_out_queue_is_empty(queue))
122 qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
123 }
124
qeth_set_coalesce(struct net_device * dev,struct ethtool_coalesce * coal,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)125 static int qeth_set_coalesce(struct net_device *dev,
126 struct ethtool_coalesce *coal,
127 struct kernel_ethtool_coalesce *kernel_coal,
128 struct netlink_ext_ack *extack)
129 {
130 struct qeth_card *card = dev->ml_priv;
131 struct qeth_qdio_out_q *queue;
132 unsigned int i;
133
134 if (!IS_IQD(card))
135 return -EOPNOTSUPP;
136
137 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
138 return -EINVAL;
139
140 qeth_for_each_output_queue(card, queue, i)
141 __qeth_set_coalesce(dev, queue, coal);
142
143 return 0;
144 }
145
qeth_get_ringparam(struct net_device * dev,struct ethtool_ringparam * param)146 static void qeth_get_ringparam(struct net_device *dev,
147 struct ethtool_ringparam *param)
148 {
149 struct qeth_card *card = dev->ml_priv;
150
151 param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
152 param->rx_mini_max_pending = 0;
153 param->rx_jumbo_max_pending = 0;
154 param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
155
156 param->rx_pending = card->qdio.in_buf_pool.buf_count;
157 param->rx_mini_pending = 0;
158 param->rx_jumbo_pending = 0;
159 param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
160 }
161
qeth_get_strings(struct net_device * dev,u32 stringset,u8 * data)162 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
163 {
164 struct qeth_card *card = dev->ml_priv;
165 char prefix[ETH_GSTRING_LEN] = "";
166 unsigned int i;
167
168 switch (stringset) {
169 case ETH_SS_STATS:
170 qeth_add_stat_strings(&data, prefix, card_stats,
171 CARD_STATS_LEN);
172 for (i = 0; i < card->qdio.no_out_queues; i++) {
173 snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
174 qeth_add_stat_strings(&data, prefix, txq_stats,
175 TXQ_STATS_LEN);
176 }
177 break;
178 default:
179 WARN_ON(1);
180 break;
181 }
182 }
183
qeth_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)184 static void qeth_get_drvinfo(struct net_device *dev,
185 struct ethtool_drvinfo *info)
186 {
187 struct qeth_card *card = dev->ml_priv;
188
189 strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
190 sizeof(info->driver));
191 strlcpy(info->fw_version, card->info.mcl_level,
192 sizeof(info->fw_version));
193 snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
194 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
195 }
196
qeth_get_channels(struct net_device * dev,struct ethtool_channels * channels)197 static void qeth_get_channels(struct net_device *dev,
198 struct ethtool_channels *channels)
199 {
200 struct qeth_card *card = dev->ml_priv;
201
202 channels->max_rx = dev->num_rx_queues;
203 channels->max_tx = card->qdio.no_out_queues;
204 channels->max_other = 0;
205 channels->max_combined = 0;
206 channels->rx_count = dev->real_num_rx_queues;
207 channels->tx_count = dev->real_num_tx_queues;
208 channels->other_count = 0;
209 channels->combined_count = 0;
210 }
211
qeth_set_channels(struct net_device * dev,struct ethtool_channels * channels)212 static int qeth_set_channels(struct net_device *dev,
213 struct ethtool_channels *channels)
214 {
215 struct qeth_priv *priv = netdev_priv(dev);
216 struct qeth_card *card = dev->ml_priv;
217 int rc;
218
219 if (channels->rx_count == 0 || channels->tx_count == 0)
220 return -EINVAL;
221 if (channels->tx_count > card->qdio.no_out_queues)
222 return -EINVAL;
223
224 /* Prio-queueing needs all TX queues: */
225 if (qeth_uses_tx_prio_queueing(card))
226 return -EPERM;
227
228 if (IS_IQD(card)) {
229 if (channels->tx_count < QETH_IQD_MIN_TXQ)
230 return -EINVAL;
231
232 /* Reject downgrade while running. It could push displaced
233 * ucast flows onto txq0, which is reserved for mcast.
234 */
235 if (netif_running(dev) &&
236 channels->tx_count < dev->real_num_tx_queues)
237 return -EPERM;
238 }
239
240 rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
241 if (!rc)
242 priv->tx_wanted_queues = channels->tx_count;
243
244 return rc;
245 }
246
qeth_get_ts_info(struct net_device * dev,struct ethtool_ts_info * info)247 static int qeth_get_ts_info(struct net_device *dev,
248 struct ethtool_ts_info *info)
249 {
250 struct qeth_card *card = dev->ml_priv;
251
252 if (!IS_IQD(card))
253 return -EOPNOTSUPP;
254
255 return ethtool_op_get_ts_info(dev, info);
256 }
257
qeth_get_tunable(struct net_device * dev,const struct ethtool_tunable * tuna,void * data)258 static int qeth_get_tunable(struct net_device *dev,
259 const struct ethtool_tunable *tuna, void *data)
260 {
261 struct qeth_priv *priv = netdev_priv(dev);
262
263 switch (tuna->id) {
264 case ETHTOOL_RX_COPYBREAK:
265 *(u32 *)data = priv->rx_copybreak;
266 return 0;
267 default:
268 return -EOPNOTSUPP;
269 }
270 }
271
qeth_set_tunable(struct net_device * dev,const struct ethtool_tunable * tuna,const void * data)272 static int qeth_set_tunable(struct net_device *dev,
273 const struct ethtool_tunable *tuna,
274 const void *data)
275 {
276 struct qeth_priv *priv = netdev_priv(dev);
277
278 switch (tuna->id) {
279 case ETHTOOL_RX_COPYBREAK:
280 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
281 return 0;
282 default:
283 return -EOPNOTSUPP;
284 }
285 }
286
qeth_get_per_queue_coalesce(struct net_device * dev,u32 __queue,struct ethtool_coalesce * coal)287 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
288 struct ethtool_coalesce *coal)
289 {
290 struct qeth_card *card = dev->ml_priv;
291 struct qeth_qdio_out_q *queue;
292
293 if (!IS_IQD(card))
294 return -EOPNOTSUPP;
295
296 if (__queue >= card->qdio.no_out_queues)
297 return -EINVAL;
298
299 queue = card->qdio.out_qs[__queue];
300
301 coal->tx_coalesce_usecs = queue->coalesce_usecs;
302 coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
303 return 0;
304 }
305
qeth_set_per_queue_coalesce(struct net_device * dev,u32 queue,struct ethtool_coalesce * coal)306 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
307 struct ethtool_coalesce *coal)
308 {
309 struct qeth_card *card = dev->ml_priv;
310
311 if (!IS_IQD(card))
312 return -EOPNOTSUPP;
313
314 if (queue >= card->qdio.no_out_queues)
315 return -EINVAL;
316
317 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
318 return -EINVAL;
319
320 __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
321 return 0;
322 }
323
324 /* Helper function to fill 'advertising' and 'supported' which are the same. */
325 /* Autoneg and full-duplex are supported and advertised unconditionally. */
326 /* Always advertise and support all speeds up to specified, and only one */
327 /* specified port type. */
qeth_set_ethtool_link_modes(struct ethtool_link_ksettings * cmd,enum qeth_link_mode link_mode)328 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
329 enum qeth_link_mode link_mode)
330 {
331 ethtool_link_ksettings_zero_link_mode(cmd, supported);
332 ethtool_link_ksettings_zero_link_mode(cmd, advertising);
333 ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
334
335 ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
336 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
337
338 switch (cmd->base.port) {
339 case PORT_TP:
340 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
341 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
342
343 switch (cmd->base.speed) {
344 case SPEED_10000:
345 ethtool_link_ksettings_add_link_mode(cmd, supported,
346 10000baseT_Full);
347 ethtool_link_ksettings_add_link_mode(cmd, advertising,
348 10000baseT_Full);
349 fallthrough;
350 case SPEED_1000:
351 ethtool_link_ksettings_add_link_mode(cmd, supported,
352 1000baseT_Full);
353 ethtool_link_ksettings_add_link_mode(cmd, advertising,
354 1000baseT_Full);
355 ethtool_link_ksettings_add_link_mode(cmd, supported,
356 1000baseT_Half);
357 ethtool_link_ksettings_add_link_mode(cmd, advertising,
358 1000baseT_Half);
359 fallthrough;
360 case SPEED_100:
361 ethtool_link_ksettings_add_link_mode(cmd, supported,
362 100baseT_Full);
363 ethtool_link_ksettings_add_link_mode(cmd, advertising,
364 100baseT_Full);
365 ethtool_link_ksettings_add_link_mode(cmd, supported,
366 100baseT_Half);
367 ethtool_link_ksettings_add_link_mode(cmd, advertising,
368 100baseT_Half);
369 fallthrough;
370 case SPEED_10:
371 ethtool_link_ksettings_add_link_mode(cmd, supported,
372 10baseT_Full);
373 ethtool_link_ksettings_add_link_mode(cmd, advertising,
374 10baseT_Full);
375 ethtool_link_ksettings_add_link_mode(cmd, supported,
376 10baseT_Half);
377 ethtool_link_ksettings_add_link_mode(cmd, advertising,
378 10baseT_Half);
379 break;
380 default:
381 break;
382 }
383
384 break;
385 case PORT_FIBRE:
386 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
387 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
388
389 switch (cmd->base.speed) {
390 case SPEED_25000:
391 ethtool_link_ksettings_add_link_mode(cmd, supported,
392 25000baseSR_Full);
393 ethtool_link_ksettings_add_link_mode(cmd, advertising,
394 25000baseSR_Full);
395 break;
396 case SPEED_10000:
397 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
398 ethtool_link_ksettings_add_link_mode(cmd, supported,
399 10000baseLR_Full);
400 ethtool_link_ksettings_add_link_mode(cmd, advertising,
401 10000baseLR_Full);
402 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
403 ethtool_link_ksettings_add_link_mode(cmd, supported,
404 10000baseSR_Full);
405 ethtool_link_ksettings_add_link_mode(cmd, advertising,
406 10000baseSR_Full);
407 }
408 break;
409 case SPEED_1000:
410 ethtool_link_ksettings_add_link_mode(cmd, supported,
411 1000baseX_Full);
412 ethtool_link_ksettings_add_link_mode(cmd, advertising,
413 1000baseX_Full);
414 break;
415 default:
416 break;
417 }
418
419 break;
420 default:
421 break;
422 }
423 }
424
qeth_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)425 static int qeth_get_link_ksettings(struct net_device *netdev,
426 struct ethtool_link_ksettings *cmd)
427 {
428 struct qeth_card *card = netdev->ml_priv;
429 struct qeth_link_info link_info;
430
431 cmd->base.speed = card->info.link_info.speed;
432 cmd->base.duplex = card->info.link_info.duplex;
433 cmd->base.port = card->info.link_info.port;
434 cmd->base.autoneg = AUTONEG_ENABLE;
435 cmd->base.phy_address = 0;
436 cmd->base.mdio_support = 0;
437 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
438 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
439
440 /* Check if we can obtain more accurate information. */
441 if (!qeth_query_card_info(card, &link_info)) {
442 if (link_info.speed != SPEED_UNKNOWN)
443 cmd->base.speed = link_info.speed;
444 if (link_info.duplex != DUPLEX_UNKNOWN)
445 cmd->base.duplex = link_info.duplex;
446 if (link_info.port != PORT_OTHER)
447 cmd->base.port = link_info.port;
448 }
449
450 qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
451
452 return 0;
453 }
454
455 const struct ethtool_ops qeth_ethtool_ops = {
456 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
457 ETHTOOL_COALESCE_TX_MAX_FRAMES,
458 .get_link = ethtool_op_get_link,
459 .set_coalesce = qeth_set_coalesce,
460 .get_ringparam = qeth_get_ringparam,
461 .get_strings = qeth_get_strings,
462 .get_ethtool_stats = qeth_get_ethtool_stats,
463 .get_sset_count = qeth_get_sset_count,
464 .get_drvinfo = qeth_get_drvinfo,
465 .get_channels = qeth_get_channels,
466 .set_channels = qeth_set_channels,
467 .get_ts_info = qeth_get_ts_info,
468 .get_tunable = qeth_get_tunable,
469 .set_tunable = qeth_set_tunable,
470 .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
471 .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
472 .get_link_ksettings = qeth_get_link_ksettings,
473 };
474