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,struct kernel_ethtool_ringparam * kernel_param,struct netlink_ext_ack * extack)146 static void qeth_get_ringparam(struct net_device *dev,
147 struct ethtool_ringparam *param,
148 struct kernel_ethtool_ringparam *kernel_param,
149 struct netlink_ext_ack *extack)
150 {
151 struct qeth_card *card = dev->ml_priv;
152
153 param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
154 param->rx_mini_max_pending = 0;
155 param->rx_jumbo_max_pending = 0;
156 param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
157
158 param->rx_pending = card->qdio.in_buf_pool.buf_count;
159 param->rx_mini_pending = 0;
160 param->rx_jumbo_pending = 0;
161 param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
162 }
163
qeth_get_strings(struct net_device * dev,u32 stringset,u8 * data)164 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
165 {
166 struct qeth_card *card = dev->ml_priv;
167 char prefix[ETH_GSTRING_LEN] = "";
168 unsigned int i;
169
170 switch (stringset) {
171 case ETH_SS_STATS:
172 qeth_add_stat_strings(&data, prefix, card_stats,
173 CARD_STATS_LEN);
174 for (i = 0; i < card->qdio.no_out_queues; i++) {
175 scnprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
176 qeth_add_stat_strings(&data, prefix, txq_stats,
177 TXQ_STATS_LEN);
178 }
179 break;
180 default:
181 WARN_ON(1);
182 break;
183 }
184 }
185
qeth_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)186 static void qeth_get_drvinfo(struct net_device *dev,
187 struct ethtool_drvinfo *info)
188 {
189 struct qeth_card *card = dev->ml_priv;
190
191 strscpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
192 sizeof(info->driver));
193 strscpy(info->fw_version, card->info.mcl_level,
194 sizeof(info->fw_version));
195 scnprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
196 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
197 }
198
qeth_get_channels(struct net_device * dev,struct ethtool_channels * channels)199 static void qeth_get_channels(struct net_device *dev,
200 struct ethtool_channels *channels)
201 {
202 struct qeth_card *card = dev->ml_priv;
203
204 channels->max_rx = dev->num_rx_queues;
205 channels->max_tx = card->qdio.no_out_queues;
206 channels->max_other = 0;
207 channels->max_combined = 0;
208 channels->rx_count = dev->real_num_rx_queues;
209 channels->tx_count = dev->real_num_tx_queues;
210 channels->other_count = 0;
211 channels->combined_count = 0;
212 }
213
qeth_set_channels(struct net_device * dev,struct ethtool_channels * channels)214 static int qeth_set_channels(struct net_device *dev,
215 struct ethtool_channels *channels)
216 {
217 struct qeth_priv *priv = netdev_priv(dev);
218 struct qeth_card *card = dev->ml_priv;
219 int rc;
220
221 if (channels->rx_count == 0 || channels->tx_count == 0)
222 return -EINVAL;
223 if (channels->tx_count > card->qdio.no_out_queues)
224 return -EINVAL;
225
226 /* Prio-queueing needs all TX queues: */
227 if (qeth_uses_tx_prio_queueing(card))
228 return -EPERM;
229
230 if (IS_IQD(card)) {
231 if (channels->tx_count < QETH_IQD_MIN_TXQ)
232 return -EINVAL;
233
234 /* Reject downgrade while running. It could push displaced
235 * ucast flows onto txq0, which is reserved for mcast.
236 */
237 if (netif_running(dev) &&
238 channels->tx_count < dev->real_num_tx_queues)
239 return -EPERM;
240 }
241
242 rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
243 if (!rc)
244 priv->tx_wanted_queues = channels->tx_count;
245
246 return rc;
247 }
248
qeth_get_ts_info(struct net_device * dev,struct ethtool_ts_info * info)249 static int qeth_get_ts_info(struct net_device *dev,
250 struct ethtool_ts_info *info)
251 {
252 struct qeth_card *card = dev->ml_priv;
253
254 if (!IS_IQD(card))
255 return -EOPNOTSUPP;
256
257 return ethtool_op_get_ts_info(dev, info);
258 }
259
qeth_get_tunable(struct net_device * dev,const struct ethtool_tunable * tuna,void * data)260 static int qeth_get_tunable(struct net_device *dev,
261 const struct ethtool_tunable *tuna, void *data)
262 {
263 struct qeth_priv *priv = netdev_priv(dev);
264
265 switch (tuna->id) {
266 case ETHTOOL_RX_COPYBREAK:
267 *(u32 *)data = priv->rx_copybreak;
268 return 0;
269 default:
270 return -EOPNOTSUPP;
271 }
272 }
273
qeth_set_tunable(struct net_device * dev,const struct ethtool_tunable * tuna,const void * data)274 static int qeth_set_tunable(struct net_device *dev,
275 const struct ethtool_tunable *tuna,
276 const void *data)
277 {
278 struct qeth_priv *priv = netdev_priv(dev);
279
280 switch (tuna->id) {
281 case ETHTOOL_RX_COPYBREAK:
282 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
283 return 0;
284 default:
285 return -EOPNOTSUPP;
286 }
287 }
288
qeth_get_per_queue_coalesce(struct net_device * dev,u32 __queue,struct ethtool_coalesce * coal)289 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
290 struct ethtool_coalesce *coal)
291 {
292 struct qeth_card *card = dev->ml_priv;
293 struct qeth_qdio_out_q *queue;
294
295 if (!IS_IQD(card))
296 return -EOPNOTSUPP;
297
298 if (__queue >= card->qdio.no_out_queues)
299 return -EINVAL;
300
301 queue = card->qdio.out_qs[__queue];
302
303 coal->tx_coalesce_usecs = queue->coalesce_usecs;
304 coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
305 return 0;
306 }
307
qeth_set_per_queue_coalesce(struct net_device * dev,u32 queue,struct ethtool_coalesce * coal)308 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
309 struct ethtool_coalesce *coal)
310 {
311 struct qeth_card *card = dev->ml_priv;
312
313 if (!IS_IQD(card))
314 return -EOPNOTSUPP;
315
316 if (queue >= card->qdio.no_out_queues)
317 return -EINVAL;
318
319 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
320 return -EINVAL;
321
322 __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
323 return 0;
324 }
325
326 /* Helper function to fill 'advertising' and 'supported' which are the same. */
327 /* Autoneg and full-duplex are supported and advertised unconditionally. */
328 /* Always advertise and support all speeds up to specified, and only one */
329 /* specified port type. */
qeth_set_ethtool_link_modes(struct ethtool_link_ksettings * cmd,enum qeth_link_mode link_mode)330 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
331 enum qeth_link_mode link_mode)
332 {
333 ethtool_link_ksettings_zero_link_mode(cmd, supported);
334 ethtool_link_ksettings_zero_link_mode(cmd, advertising);
335 ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
336
337 ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
338 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
339
340 switch (cmd->base.port) {
341 case PORT_TP:
342 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
343 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
344
345 switch (cmd->base.speed) {
346 case SPEED_10000:
347 ethtool_link_ksettings_add_link_mode(cmd, supported,
348 10000baseT_Full);
349 ethtool_link_ksettings_add_link_mode(cmd, advertising,
350 10000baseT_Full);
351 fallthrough;
352 case SPEED_1000:
353 ethtool_link_ksettings_add_link_mode(cmd, supported,
354 1000baseT_Full);
355 ethtool_link_ksettings_add_link_mode(cmd, advertising,
356 1000baseT_Full);
357 ethtool_link_ksettings_add_link_mode(cmd, supported,
358 1000baseT_Half);
359 ethtool_link_ksettings_add_link_mode(cmd, advertising,
360 1000baseT_Half);
361 fallthrough;
362 case SPEED_100:
363 ethtool_link_ksettings_add_link_mode(cmd, supported,
364 100baseT_Full);
365 ethtool_link_ksettings_add_link_mode(cmd, advertising,
366 100baseT_Full);
367 ethtool_link_ksettings_add_link_mode(cmd, supported,
368 100baseT_Half);
369 ethtool_link_ksettings_add_link_mode(cmd, advertising,
370 100baseT_Half);
371 fallthrough;
372 case SPEED_10:
373 ethtool_link_ksettings_add_link_mode(cmd, supported,
374 10baseT_Full);
375 ethtool_link_ksettings_add_link_mode(cmd, advertising,
376 10baseT_Full);
377 ethtool_link_ksettings_add_link_mode(cmd, supported,
378 10baseT_Half);
379 ethtool_link_ksettings_add_link_mode(cmd, advertising,
380 10baseT_Half);
381 break;
382 default:
383 break;
384 }
385
386 break;
387 case PORT_FIBRE:
388 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
389 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
390
391 switch (cmd->base.speed) {
392 case SPEED_25000:
393 ethtool_link_ksettings_add_link_mode(cmd, supported,
394 25000baseSR_Full);
395 ethtool_link_ksettings_add_link_mode(cmd, advertising,
396 25000baseSR_Full);
397 break;
398 case SPEED_10000:
399 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
400 ethtool_link_ksettings_add_link_mode(cmd, supported,
401 10000baseLR_Full);
402 ethtool_link_ksettings_add_link_mode(cmd, advertising,
403 10000baseLR_Full);
404 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
405 ethtool_link_ksettings_add_link_mode(cmd, supported,
406 10000baseSR_Full);
407 ethtool_link_ksettings_add_link_mode(cmd, advertising,
408 10000baseSR_Full);
409 }
410 break;
411 case SPEED_1000:
412 ethtool_link_ksettings_add_link_mode(cmd, supported,
413 1000baseX_Full);
414 ethtool_link_ksettings_add_link_mode(cmd, advertising,
415 1000baseX_Full);
416 break;
417 default:
418 break;
419 }
420
421 break;
422 default:
423 break;
424 }
425 }
426
qeth_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)427 static int qeth_get_link_ksettings(struct net_device *netdev,
428 struct ethtool_link_ksettings *cmd)
429 {
430 struct qeth_card *card = netdev->ml_priv;
431
432 QETH_CARD_TEXT(card, 4, "ethtglks");
433 cmd->base.speed = card->info.link_info.speed;
434 cmd->base.duplex = card->info.link_info.duplex;
435 cmd->base.port = card->info.link_info.port;
436 cmd->base.autoneg = AUTONEG_ENABLE;
437 cmd->base.phy_address = 0;
438 cmd->base.mdio_support = 0;
439 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
440 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
441
442 qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
443
444 return 0;
445 }
446
447 const struct ethtool_ops qeth_ethtool_ops = {
448 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
449 ETHTOOL_COALESCE_TX_MAX_FRAMES,
450 .get_link = ethtool_op_get_link,
451 .set_coalesce = qeth_set_coalesce,
452 .get_ringparam = qeth_get_ringparam,
453 .get_strings = qeth_get_strings,
454 .get_ethtool_stats = qeth_get_ethtool_stats,
455 .get_sset_count = qeth_get_sset_count,
456 .get_drvinfo = qeth_get_drvinfo,
457 .get_channels = qeth_get_channels,
458 .set_channels = qeth_set_channels,
459 .get_ts_info = qeth_get_ts_info,
460 .get_tunable = qeth_get_tunable,
461 .set_tunable = qeth_set_tunable,
462 .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
463 .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
464 .get_link_ksettings = qeth_get_link_ksettings,
465 };
466