1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Google virtual Ethernet (gve) driver
3 *
4 * Copyright (C) 2015-2021 Google, Inc.
5 */
6
7 #include <linux/ethtool.h>
8 #include <linux/rtnetlink.h>
9 #include "gve.h"
10 #include "gve_adminq.h"
11 #include "gve_dqo.h"
12
gve_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)13 static void gve_get_drvinfo(struct net_device *netdev,
14 struct ethtool_drvinfo *info)
15 {
16 struct gve_priv *priv = netdev_priv(netdev);
17
18 strscpy(info->driver, gve_driver_name, sizeof(info->driver));
19 strscpy(info->version, gve_version_str, sizeof(info->version));
20 strscpy(info->bus_info, pci_name(priv->pdev), sizeof(info->bus_info));
21 }
22
gve_set_msglevel(struct net_device * netdev,u32 value)23 static void gve_set_msglevel(struct net_device *netdev, u32 value)
24 {
25 struct gve_priv *priv = netdev_priv(netdev);
26
27 priv->msg_enable = value;
28 }
29
gve_get_msglevel(struct net_device * netdev)30 static u32 gve_get_msglevel(struct net_device *netdev)
31 {
32 struct gve_priv *priv = netdev_priv(netdev);
33
34 return priv->msg_enable;
35 }
36
37 /* For the following stats column string names, make sure the order
38 * matches how it is filled in the code. For xdp_aborted, xdp_drop,
39 * xdp_pass, xdp_tx, xdp_redirect, make sure it also matches the order
40 * as declared in enum xdp_action inside file uapi/linux/bpf.h .
41 */
42 static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = {
43 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes",
44 "rx_dropped", "tx_dropped", "tx_timeouts",
45 "rx_skb_alloc_fail", "rx_buf_alloc_fail", "rx_desc_err_dropped_pkt",
46 "interface_up_cnt", "interface_down_cnt", "reset_cnt",
47 "page_alloc_fail", "dma_mapping_error", "stats_report_trigger_cnt",
48 };
49
50 static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = {
51 "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_consumed_desc[%u]", "rx_bytes[%u]",
52 "rx_cont_packet_cnt[%u]", "rx_frag_flip_cnt[%u]", "rx_frag_copy_cnt[%u]",
53 "rx_frag_alloc_cnt[%u]",
54 "rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]",
55 "rx_queue_drop_cnt[%u]", "rx_no_buffers_posted[%u]",
56 "rx_drops_packet_over_mru[%u]", "rx_drops_invalid_checksum[%u]",
57 "rx_xdp_aborted[%u]", "rx_xdp_drop[%u]", "rx_xdp_pass[%u]",
58 "rx_xdp_tx[%u]", "rx_xdp_redirect[%u]",
59 "rx_xdp_tx_errors[%u]", "rx_xdp_redirect_errors[%u]", "rx_xdp_alloc_fails[%u]",
60 };
61
62 static const char gve_gstrings_tx_stats[][ETH_GSTRING_LEN] = {
63 "tx_posted_desc[%u]", "tx_completed_desc[%u]", "tx_consumed_desc[%u]", "tx_bytes[%u]",
64 "tx_wake[%u]", "tx_stop[%u]", "tx_event_counter[%u]",
65 "tx_dma_mapping_error[%u]", "tx_xsk_wakeup[%u]",
66 "tx_xsk_done[%u]", "tx_xsk_sent[%u]", "tx_xdp_xmit[%u]", "tx_xdp_xmit_errors[%u]"
67 };
68
69 static const char gve_gstrings_adminq_stats[][ETH_GSTRING_LEN] = {
70 "adminq_prod_cnt", "adminq_cmd_fail", "adminq_timeouts",
71 "adminq_describe_device_cnt", "adminq_cfg_device_resources_cnt",
72 "adminq_register_page_list_cnt", "adminq_unregister_page_list_cnt",
73 "adminq_create_tx_queue_cnt", "adminq_create_rx_queue_cnt",
74 "adminq_destroy_tx_queue_cnt", "adminq_destroy_rx_queue_cnt",
75 "adminq_dcfg_device_resources_cnt", "adminq_set_driver_parameter_cnt",
76 "adminq_report_stats_cnt", "adminq_report_link_speed_cnt"
77 };
78
79 static const char gve_gstrings_priv_flags[][ETH_GSTRING_LEN] = {
80 "report-stats",
81 };
82
83 #define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats)
84 #define GVE_ADMINQ_STATS_LEN ARRAY_SIZE(gve_gstrings_adminq_stats)
85 #define NUM_GVE_TX_CNTS ARRAY_SIZE(gve_gstrings_tx_stats)
86 #define NUM_GVE_RX_CNTS ARRAY_SIZE(gve_gstrings_rx_stats)
87 #define GVE_PRIV_FLAGS_STR_LEN ARRAY_SIZE(gve_gstrings_priv_flags)
88
gve_get_strings(struct net_device * netdev,u32 stringset,u8 * data)89 static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
90 {
91 struct gve_priv *priv = netdev_priv(netdev);
92 char *s = (char *)data;
93 int num_tx_queues;
94 int i, j;
95
96 num_tx_queues = gve_num_tx_queues(priv);
97 switch (stringset) {
98 case ETH_SS_STATS:
99 memcpy(s, *gve_gstrings_main_stats,
100 sizeof(gve_gstrings_main_stats));
101 s += sizeof(gve_gstrings_main_stats);
102
103 for (i = 0; i < priv->rx_cfg.num_queues; i++) {
104 for (j = 0; j < NUM_GVE_RX_CNTS; j++) {
105 snprintf(s, ETH_GSTRING_LEN,
106 gve_gstrings_rx_stats[j], i);
107 s += ETH_GSTRING_LEN;
108 }
109 }
110
111 for (i = 0; i < num_tx_queues; i++) {
112 for (j = 0; j < NUM_GVE_TX_CNTS; j++) {
113 snprintf(s, ETH_GSTRING_LEN,
114 gve_gstrings_tx_stats[j], i);
115 s += ETH_GSTRING_LEN;
116 }
117 }
118
119 memcpy(s, *gve_gstrings_adminq_stats,
120 sizeof(gve_gstrings_adminq_stats));
121 s += sizeof(gve_gstrings_adminq_stats);
122 break;
123
124 case ETH_SS_PRIV_FLAGS:
125 memcpy(s, *gve_gstrings_priv_flags,
126 sizeof(gve_gstrings_priv_flags));
127 s += sizeof(gve_gstrings_priv_flags);
128 break;
129
130 default:
131 break;
132 }
133 }
134
gve_get_sset_count(struct net_device * netdev,int sset)135 static int gve_get_sset_count(struct net_device *netdev, int sset)
136 {
137 struct gve_priv *priv = netdev_priv(netdev);
138 int num_tx_queues;
139
140 num_tx_queues = gve_num_tx_queues(priv);
141 switch (sset) {
142 case ETH_SS_STATS:
143 return GVE_MAIN_STATS_LEN + GVE_ADMINQ_STATS_LEN +
144 (priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) +
145 (num_tx_queues * NUM_GVE_TX_CNTS);
146 case ETH_SS_PRIV_FLAGS:
147 return GVE_PRIV_FLAGS_STR_LEN;
148 default:
149 return -EOPNOTSUPP;
150 }
151 }
152
153 static void
gve_get_ethtool_stats(struct net_device * netdev,struct ethtool_stats * stats,u64 * data)154 gve_get_ethtool_stats(struct net_device *netdev,
155 struct ethtool_stats *stats, u64 *data)
156 {
157 u64 tmp_rx_pkts, tmp_rx_bytes, tmp_rx_skb_alloc_fail,
158 tmp_rx_buf_alloc_fail, tmp_rx_desc_err_dropped_pkt,
159 tmp_tx_pkts, tmp_tx_bytes;
160 u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_pkts,
161 rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes, tx_dropped;
162 int stats_idx, base_stats_idx, max_stats_idx;
163 struct stats *report_stats;
164 int *rx_qid_to_stats_idx;
165 int *tx_qid_to_stats_idx;
166 struct gve_priv *priv;
167 bool skip_nic_stats;
168 unsigned int start;
169 int num_tx_queues;
170 int ring;
171 int i, j;
172
173 ASSERT_RTNL();
174
175 priv = netdev_priv(netdev);
176 num_tx_queues = gve_num_tx_queues(priv);
177 report_stats = priv->stats_report->stats;
178 rx_qid_to_stats_idx = kmalloc_array(priv->rx_cfg.num_queues,
179 sizeof(int), GFP_KERNEL);
180 if (!rx_qid_to_stats_idx)
181 return;
182 tx_qid_to_stats_idx = kmalloc_array(num_tx_queues,
183 sizeof(int), GFP_KERNEL);
184 if (!tx_qid_to_stats_idx) {
185 kfree(rx_qid_to_stats_idx);
186 return;
187 }
188 for (rx_pkts = 0, rx_bytes = 0, rx_skb_alloc_fail = 0,
189 rx_buf_alloc_fail = 0, rx_desc_err_dropped_pkt = 0, ring = 0;
190 ring < priv->rx_cfg.num_queues; ring++) {
191 if (priv->rx) {
192 do {
193 struct gve_rx_ring *rx = &priv->rx[ring];
194
195 start =
196 u64_stats_fetch_begin(&priv->rx[ring].statss);
197 tmp_rx_pkts = rx->rpackets;
198 tmp_rx_bytes = rx->rbytes;
199 tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail;
200 tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail;
201 tmp_rx_desc_err_dropped_pkt =
202 rx->rx_desc_err_dropped_pkt;
203 } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
204 start));
205 rx_pkts += tmp_rx_pkts;
206 rx_bytes += tmp_rx_bytes;
207 rx_skb_alloc_fail += tmp_rx_skb_alloc_fail;
208 rx_buf_alloc_fail += tmp_rx_buf_alloc_fail;
209 rx_desc_err_dropped_pkt += tmp_rx_desc_err_dropped_pkt;
210 }
211 }
212 for (tx_pkts = 0, tx_bytes = 0, tx_dropped = 0, ring = 0;
213 ring < num_tx_queues; ring++) {
214 if (priv->tx) {
215 do {
216 start =
217 u64_stats_fetch_begin(&priv->tx[ring].statss);
218 tmp_tx_pkts = priv->tx[ring].pkt_done;
219 tmp_tx_bytes = priv->tx[ring].bytes_done;
220 } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
221 start));
222 tx_pkts += tmp_tx_pkts;
223 tx_bytes += tmp_tx_bytes;
224 tx_dropped += priv->tx[ring].dropped_pkt;
225 }
226 }
227
228 i = 0;
229 data[i++] = rx_pkts;
230 data[i++] = tx_pkts;
231 data[i++] = rx_bytes;
232 data[i++] = tx_bytes;
233 /* total rx dropped packets */
234 data[i++] = rx_skb_alloc_fail + rx_buf_alloc_fail +
235 rx_desc_err_dropped_pkt;
236 data[i++] = tx_dropped;
237 data[i++] = priv->tx_timeo_cnt;
238 data[i++] = rx_skb_alloc_fail;
239 data[i++] = rx_buf_alloc_fail;
240 data[i++] = rx_desc_err_dropped_pkt;
241 data[i++] = priv->interface_up_cnt;
242 data[i++] = priv->interface_down_cnt;
243 data[i++] = priv->reset_cnt;
244 data[i++] = priv->page_alloc_fail;
245 data[i++] = priv->dma_mapping_error;
246 data[i++] = priv->stats_report_trigger_cnt;
247 i = GVE_MAIN_STATS_LEN;
248
249 /* For rx cross-reporting stats, start from nic rx stats in report */
250 base_stats_idx = GVE_TX_STATS_REPORT_NUM * num_tx_queues +
251 GVE_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues;
252 max_stats_idx = NIC_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues +
253 base_stats_idx;
254 /* Preprocess the stats report for rx, map queue id to start index */
255 skip_nic_stats = false;
256 for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
257 stats_idx += NIC_RX_STATS_REPORT_NUM) {
258 u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
259 u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
260
261 if (stat_name == 0) {
262 /* no stats written by NIC yet */
263 skip_nic_stats = true;
264 break;
265 }
266 rx_qid_to_stats_idx[queue_id] = stats_idx;
267 }
268 /* walk RX rings */
269 if (priv->rx) {
270 for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) {
271 struct gve_rx_ring *rx = &priv->rx[ring];
272
273 data[i++] = rx->fill_cnt;
274 data[i++] = rx->cnt;
275 data[i++] = rx->fill_cnt - rx->cnt;
276 do {
277 start =
278 u64_stats_fetch_begin(&priv->rx[ring].statss);
279 tmp_rx_bytes = rx->rbytes;
280 tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail;
281 tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail;
282 tmp_rx_desc_err_dropped_pkt =
283 rx->rx_desc_err_dropped_pkt;
284 } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
285 start));
286 data[i++] = tmp_rx_bytes;
287 data[i++] = rx->rx_cont_packet_cnt;
288 data[i++] = rx->rx_frag_flip_cnt;
289 data[i++] = rx->rx_frag_copy_cnt;
290 data[i++] = rx->rx_frag_alloc_cnt;
291 /* rx dropped packets */
292 data[i++] = tmp_rx_skb_alloc_fail +
293 tmp_rx_buf_alloc_fail +
294 tmp_rx_desc_err_dropped_pkt;
295 data[i++] = rx->rx_copybreak_pkt;
296 data[i++] = rx->rx_copied_pkt;
297 /* stats from NIC */
298 if (skip_nic_stats) {
299 /* skip NIC rx stats */
300 i += NIC_RX_STATS_REPORT_NUM;
301 } else {
302 stats_idx = rx_qid_to_stats_idx[ring];
303 for (j = 0; j < NIC_RX_STATS_REPORT_NUM; j++) {
304 u64 value =
305 be64_to_cpu(report_stats[stats_idx + j].value);
306
307 data[i++] = value;
308 }
309 }
310 /* XDP rx counters */
311 do {
312 start = u64_stats_fetch_begin(&priv->rx[ring].statss);
313 for (j = 0; j < GVE_XDP_ACTIONS; j++)
314 data[i + j] = rx->xdp_actions[j];
315 data[i + j++] = rx->xdp_tx_errors;
316 data[i + j++] = rx->xdp_redirect_errors;
317 data[i + j++] = rx->xdp_alloc_fails;
318 } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
319 start));
320 i += GVE_XDP_ACTIONS + 3; /* XDP rx counters */
321 }
322 } else {
323 i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS;
324 }
325
326 /* For tx cross-reporting stats, start from nic tx stats in report */
327 base_stats_idx = max_stats_idx;
328 max_stats_idx = NIC_TX_STATS_REPORT_NUM * num_tx_queues +
329 max_stats_idx;
330 /* Preprocess the stats report for tx, map queue id to start index */
331 skip_nic_stats = false;
332 for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
333 stats_idx += NIC_TX_STATS_REPORT_NUM) {
334 u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
335 u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
336
337 if (stat_name == 0) {
338 /* no stats written by NIC yet */
339 skip_nic_stats = true;
340 break;
341 }
342 tx_qid_to_stats_idx[queue_id] = stats_idx;
343 }
344 /* walk TX rings */
345 if (priv->tx) {
346 for (ring = 0; ring < num_tx_queues; ring++) {
347 struct gve_tx_ring *tx = &priv->tx[ring];
348
349 if (gve_is_gqi(priv)) {
350 data[i++] = tx->req;
351 data[i++] = tx->done;
352 data[i++] = tx->req - tx->done;
353 } else {
354 /* DQO doesn't currently support
355 * posted/completed descriptor counts;
356 */
357 data[i++] = 0;
358 data[i++] = 0;
359 data[i++] = tx->dqo_tx.tail - tx->dqo_tx.head;
360 }
361 do {
362 start =
363 u64_stats_fetch_begin(&priv->tx[ring].statss);
364 tmp_tx_bytes = tx->bytes_done;
365 } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
366 start));
367 data[i++] = tmp_tx_bytes;
368 data[i++] = tx->wake_queue;
369 data[i++] = tx->stop_queue;
370 data[i++] = gve_tx_load_event_counter(priv, tx);
371 data[i++] = tx->dma_mapping_error;
372 /* stats from NIC */
373 if (skip_nic_stats) {
374 /* skip NIC tx stats */
375 i += NIC_TX_STATS_REPORT_NUM;
376 } else {
377 stats_idx = tx_qid_to_stats_idx[ring];
378 for (j = 0; j < NIC_TX_STATS_REPORT_NUM; j++) {
379 u64 value =
380 be64_to_cpu(report_stats[stats_idx + j].value);
381 data[i++] = value;
382 }
383 }
384 /* XDP xsk counters */
385 data[i++] = tx->xdp_xsk_wakeup;
386 data[i++] = tx->xdp_xsk_done;
387 do {
388 start = u64_stats_fetch_begin(&priv->tx[ring].statss);
389 data[i] = tx->xdp_xsk_sent;
390 data[i + 1] = tx->xdp_xmit;
391 data[i + 2] = tx->xdp_xmit_errors;
392 } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
393 start));
394 i += 3; /* XDP tx counters */
395 }
396 } else {
397 i += num_tx_queues * NUM_GVE_TX_CNTS;
398 }
399
400 kfree(rx_qid_to_stats_idx);
401 kfree(tx_qid_to_stats_idx);
402 /* AQ Stats */
403 data[i++] = priv->adminq_prod_cnt;
404 data[i++] = priv->adminq_cmd_fail;
405 data[i++] = priv->adminq_timeouts;
406 data[i++] = priv->adminq_describe_device_cnt;
407 data[i++] = priv->adminq_cfg_device_resources_cnt;
408 data[i++] = priv->adminq_register_page_list_cnt;
409 data[i++] = priv->adminq_unregister_page_list_cnt;
410 data[i++] = priv->adminq_create_tx_queue_cnt;
411 data[i++] = priv->adminq_create_rx_queue_cnt;
412 data[i++] = priv->adminq_destroy_tx_queue_cnt;
413 data[i++] = priv->adminq_destroy_rx_queue_cnt;
414 data[i++] = priv->adminq_dcfg_device_resources_cnt;
415 data[i++] = priv->adminq_set_driver_parameter_cnt;
416 data[i++] = priv->adminq_report_stats_cnt;
417 data[i++] = priv->adminq_report_link_speed_cnt;
418 }
419
gve_get_channels(struct net_device * netdev,struct ethtool_channels * cmd)420 static void gve_get_channels(struct net_device *netdev,
421 struct ethtool_channels *cmd)
422 {
423 struct gve_priv *priv = netdev_priv(netdev);
424
425 cmd->max_rx = priv->rx_cfg.max_queues;
426 cmd->max_tx = priv->tx_cfg.max_queues;
427 cmd->max_other = 0;
428 cmd->max_combined = 0;
429 cmd->rx_count = priv->rx_cfg.num_queues;
430 cmd->tx_count = priv->tx_cfg.num_queues;
431 cmd->other_count = 0;
432 cmd->combined_count = 0;
433 }
434
gve_set_channels(struct net_device * netdev,struct ethtool_channels * cmd)435 static int gve_set_channels(struct net_device *netdev,
436 struct ethtool_channels *cmd)
437 {
438 struct gve_priv *priv = netdev_priv(netdev);
439 struct gve_queue_config new_tx_cfg = priv->tx_cfg;
440 struct gve_queue_config new_rx_cfg = priv->rx_cfg;
441 struct ethtool_channels old_settings;
442 int new_tx = cmd->tx_count;
443 int new_rx = cmd->rx_count;
444
445 gve_get_channels(netdev, &old_settings);
446
447 /* Changing combined is not allowed */
448 if (cmd->combined_count != old_settings.combined_count)
449 return -EINVAL;
450
451 if (!new_rx || !new_tx)
452 return -EINVAL;
453
454 if (priv->num_xdp_queues &&
455 (new_tx != new_rx || (2 * new_tx > priv->tx_cfg.max_queues))) {
456 dev_err(&priv->pdev->dev, "XDP load failed: The number of configured RX queues should be equal to the number of configured TX queues and the number of configured RX/TX queues should be less than or equal to half the maximum number of RX/TX queues");
457 return -EINVAL;
458 }
459
460 if (!netif_carrier_ok(netdev)) {
461 priv->tx_cfg.num_queues = new_tx;
462 priv->rx_cfg.num_queues = new_rx;
463 return 0;
464 }
465
466 new_tx_cfg.num_queues = new_tx;
467 new_rx_cfg.num_queues = new_rx;
468
469 return gve_adjust_queues(priv, new_rx_cfg, new_tx_cfg);
470 }
471
gve_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * cmd,struct kernel_ethtool_ringparam * kernel_cmd,struct netlink_ext_ack * extack)472 static void gve_get_ringparam(struct net_device *netdev,
473 struct ethtool_ringparam *cmd,
474 struct kernel_ethtool_ringparam *kernel_cmd,
475 struct netlink_ext_ack *extack)
476 {
477 struct gve_priv *priv = netdev_priv(netdev);
478
479 cmd->rx_max_pending = priv->rx_desc_cnt;
480 cmd->tx_max_pending = priv->tx_desc_cnt;
481 cmd->rx_pending = priv->rx_desc_cnt;
482 cmd->tx_pending = priv->tx_desc_cnt;
483 }
484
gve_user_reset(struct net_device * netdev,u32 * flags)485 static int gve_user_reset(struct net_device *netdev, u32 *flags)
486 {
487 struct gve_priv *priv = netdev_priv(netdev);
488
489 if (*flags == ETH_RESET_ALL) {
490 *flags = 0;
491 return gve_reset(priv, true);
492 }
493
494 return -EOPNOTSUPP;
495 }
496
gve_get_tunable(struct net_device * netdev,const struct ethtool_tunable * etuna,void * value)497 static int gve_get_tunable(struct net_device *netdev,
498 const struct ethtool_tunable *etuna, void *value)
499 {
500 struct gve_priv *priv = netdev_priv(netdev);
501
502 switch (etuna->id) {
503 case ETHTOOL_RX_COPYBREAK:
504 *(u32 *)value = priv->rx_copybreak;
505 return 0;
506 default:
507 return -EOPNOTSUPP;
508 }
509 }
510
gve_set_tunable(struct net_device * netdev,const struct ethtool_tunable * etuna,const void * value)511 static int gve_set_tunable(struct net_device *netdev,
512 const struct ethtool_tunable *etuna,
513 const void *value)
514 {
515 struct gve_priv *priv = netdev_priv(netdev);
516 u32 len;
517
518 switch (etuna->id) {
519 case ETHTOOL_RX_COPYBREAK:
520 {
521 u32 max_copybreak = gve_is_gqi(priv) ?
522 (PAGE_SIZE / 2) : priv->data_buffer_size_dqo;
523
524 len = *(u32 *)value;
525 if (len > max_copybreak)
526 return -EINVAL;
527 priv->rx_copybreak = len;
528 return 0;
529 }
530 default:
531 return -EOPNOTSUPP;
532 }
533 }
534
gve_get_priv_flags(struct net_device * netdev)535 static u32 gve_get_priv_flags(struct net_device *netdev)
536 {
537 struct gve_priv *priv = netdev_priv(netdev);
538 u32 ret_flags = 0;
539
540 /* Only 1 flag exists currently: report-stats (BIT(O)), so set that flag. */
541 if (priv->ethtool_flags & BIT(0))
542 ret_flags |= BIT(0);
543 return ret_flags;
544 }
545
gve_set_priv_flags(struct net_device * netdev,u32 flags)546 static int gve_set_priv_flags(struct net_device *netdev, u32 flags)
547 {
548 struct gve_priv *priv = netdev_priv(netdev);
549 u64 ori_flags, new_flags;
550 int num_tx_queues;
551
552 num_tx_queues = gve_num_tx_queues(priv);
553 ori_flags = READ_ONCE(priv->ethtool_flags);
554 new_flags = ori_flags;
555
556 /* Only one priv flag exists: report-stats (BIT(0))*/
557 if (flags & BIT(0))
558 new_flags |= BIT(0);
559 else
560 new_flags &= ~(BIT(0));
561 priv->ethtool_flags = new_flags;
562 /* start report-stats timer when user turns report stats on. */
563 if (flags & BIT(0)) {
564 mod_timer(&priv->stats_report_timer,
565 round_jiffies(jiffies +
566 msecs_to_jiffies(priv->stats_report_timer_period)));
567 }
568 /* Zero off gve stats when report-stats turned off and */
569 /* delete report stats timer. */
570 if (!(flags & BIT(0)) && (ori_flags & BIT(0))) {
571 int tx_stats_num = GVE_TX_STATS_REPORT_NUM *
572 num_tx_queues;
573 int rx_stats_num = GVE_RX_STATS_REPORT_NUM *
574 priv->rx_cfg.num_queues;
575
576 memset(priv->stats_report->stats, 0, (tx_stats_num + rx_stats_num) *
577 sizeof(struct stats));
578 del_timer_sync(&priv->stats_report_timer);
579 }
580 return 0;
581 }
582
gve_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)583 static int gve_get_link_ksettings(struct net_device *netdev,
584 struct ethtool_link_ksettings *cmd)
585 {
586 struct gve_priv *priv = netdev_priv(netdev);
587 int err = 0;
588
589 if (priv->link_speed == 0)
590 err = gve_adminq_report_link_speed(priv);
591
592 cmd->base.speed = priv->link_speed;
593
594 cmd->base.duplex = DUPLEX_FULL;
595
596 return err;
597 }
598
gve_get_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_ec,struct netlink_ext_ack * extack)599 static int gve_get_coalesce(struct net_device *netdev,
600 struct ethtool_coalesce *ec,
601 struct kernel_ethtool_coalesce *kernel_ec,
602 struct netlink_ext_ack *extack)
603 {
604 struct gve_priv *priv = netdev_priv(netdev);
605
606 if (gve_is_gqi(priv))
607 return -EOPNOTSUPP;
608 ec->tx_coalesce_usecs = priv->tx_coalesce_usecs;
609 ec->rx_coalesce_usecs = priv->rx_coalesce_usecs;
610
611 return 0;
612 }
613
gve_set_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_ec,struct netlink_ext_ack * extack)614 static int gve_set_coalesce(struct net_device *netdev,
615 struct ethtool_coalesce *ec,
616 struct kernel_ethtool_coalesce *kernel_ec,
617 struct netlink_ext_ack *extack)
618 {
619 struct gve_priv *priv = netdev_priv(netdev);
620 u32 tx_usecs_orig = priv->tx_coalesce_usecs;
621 u32 rx_usecs_orig = priv->rx_coalesce_usecs;
622 int idx;
623
624 if (gve_is_gqi(priv))
625 return -EOPNOTSUPP;
626
627 if (ec->tx_coalesce_usecs > GVE_MAX_ITR_INTERVAL_DQO ||
628 ec->rx_coalesce_usecs > GVE_MAX_ITR_INTERVAL_DQO)
629 return -EINVAL;
630 priv->tx_coalesce_usecs = ec->tx_coalesce_usecs;
631 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
632
633 if (tx_usecs_orig != priv->tx_coalesce_usecs) {
634 for (idx = 0; idx < priv->tx_cfg.num_queues; idx++) {
635 int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx);
636 struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
637
638 gve_set_itr_coalesce_usecs_dqo(priv, block,
639 priv->tx_coalesce_usecs);
640 }
641 }
642
643 if (rx_usecs_orig != priv->rx_coalesce_usecs) {
644 for (idx = 0; idx < priv->rx_cfg.num_queues; idx++) {
645 int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx);
646 struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
647
648 gve_set_itr_coalesce_usecs_dqo(priv, block,
649 priv->rx_coalesce_usecs);
650 }
651 }
652
653 return 0;
654 }
655
656 const struct ethtool_ops gve_ethtool_ops = {
657 .supported_coalesce_params = ETHTOOL_COALESCE_USECS,
658 .get_drvinfo = gve_get_drvinfo,
659 .get_strings = gve_get_strings,
660 .get_sset_count = gve_get_sset_count,
661 .get_ethtool_stats = gve_get_ethtool_stats,
662 .set_msglevel = gve_set_msglevel,
663 .get_msglevel = gve_get_msglevel,
664 .set_channels = gve_set_channels,
665 .get_channels = gve_get_channels,
666 .get_link = ethtool_op_get_link,
667 .get_coalesce = gve_get_coalesce,
668 .set_coalesce = gve_set_coalesce,
669 .get_ringparam = gve_get_ringparam,
670 .reset = gve_user_reset,
671 .get_tunable = gve_get_tunable,
672 .set_tunable = gve_set_tunable,
673 .get_priv_flags = gve_get_priv_flags,
674 .set_priv_flags = gve_set_priv_flags,
675 .get_link_ksettings = gve_get_link_ksettings
676 };
677