1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Google virtual Ethernet (gve) driver
3 *
4 * Copyright (C) 2015-2024 Google LLC
5 */
6
7 #include <linux/rtnetlink.h>
8 #include "gve.h"
9 #include "gve_adminq.h"
10 #include "gve_dqo.h"
11 #include "gve_utils.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", "rx_hsplit_pkt", "tx_packets", "rx_bytes",
44 "tx_bytes", "rx_dropped", "tx_dropped", "tx_timeouts",
45 "rx_skb_alloc_fail", "rx_buf_alloc_fail", "rx_desc_err_dropped_pkt",
46 "rx_hsplit_unsplit_pkt",
47 "interface_up_cnt", "interface_down_cnt", "reset_cnt",
48 "page_alloc_fail", "dma_mapping_error", "stats_report_trigger_cnt",
49 };
50
51 static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = {
52 "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_consumed_desc[%u]",
53 "rx_bytes[%u]", "rx_hsplit_bytes[%u]", "rx_cont_packet_cnt[%u]",
54 "rx_frag_flip_cnt[%u]", "rx_frag_copy_cnt[%u]", "rx_frag_alloc_cnt[%u]",
55 "rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]",
56 "rx_queue_drop_cnt[%u]", "rx_no_buffers_posted[%u]",
57 "rx_drops_packet_over_mru[%u]", "rx_drops_invalid_checksum[%u]",
58 "rx_xdp_aborted[%u]", "rx_xdp_drop[%u]", "rx_xdp_pass[%u]",
59 "rx_xdp_tx[%u]", "rx_xdp_redirect[%u]",
60 "rx_xdp_tx_errors[%u]", "rx_xdp_redirect_errors[%u]", "rx_xdp_alloc_fails[%u]",
61 };
62
63 static const char gve_gstrings_tx_stats[][ETH_GSTRING_LEN] = {
64 "tx_posted_desc[%u]", "tx_completed_desc[%u]", "tx_consumed_desc[%u]", "tx_bytes[%u]",
65 "tx_wake[%u]", "tx_stop[%u]", "tx_event_counter[%u]",
66 "tx_dma_mapping_error[%u]",
67 "tx_xsk_sent[%u]", "tx_xdp_xmit[%u]", "tx_xdp_xmit_errors[%u]"
68 };
69
70 static const char gve_gstrings_adminq_stats[][ETH_GSTRING_LEN] __nonstring_array = {
71 "adminq_prod_cnt", "adminq_cmd_fail", "adminq_timeouts",
72 "adminq_describe_device_cnt", "adminq_cfg_device_resources_cnt",
73 "adminq_register_page_list_cnt", "adminq_unregister_page_list_cnt",
74 "adminq_create_tx_queue_cnt", "adminq_create_rx_queue_cnt",
75 "adminq_destroy_tx_queue_cnt", "adminq_destroy_rx_queue_cnt",
76 "adminq_dcfg_device_resources_cnt", "adminq_set_driver_parameter_cnt",
77 "adminq_report_stats_cnt", "adminq_report_link_speed_cnt", "adminq_get_ptype_map_cnt",
78 "adminq_query_flow_rules", "adminq_cfg_flow_rule", "adminq_cfg_rss_cnt",
79 "adminq_query_rss_cnt", "adminq_report_nic_timestamp_cnt",
80 };
81
82 static const char gve_gstrings_priv_flags[][ETH_GSTRING_LEN] = {
83 "report-stats",
84 };
85
86 #define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats)
87 #define GVE_ADMINQ_STATS_LEN ARRAY_SIZE(gve_gstrings_adminq_stats)
88 #define NUM_GVE_TX_CNTS ARRAY_SIZE(gve_gstrings_tx_stats)
89 #define NUM_GVE_RX_CNTS ARRAY_SIZE(gve_gstrings_rx_stats)
90 #define GVE_PRIV_FLAGS_STR_LEN ARRAY_SIZE(gve_gstrings_priv_flags)
91
gve_get_strings(struct net_device * netdev,u32 stringset,u8 * data)92 static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
93 {
94 struct gve_priv *priv = netdev_priv(netdev);
95 u8 *s = (char *)data;
96 int num_tx_queues;
97 int i, j;
98
99 num_tx_queues = gve_num_tx_queues(priv);
100 switch (stringset) {
101 case ETH_SS_STATS:
102 for (i = 0; i < ARRAY_SIZE(gve_gstrings_main_stats); i++)
103 ethtool_puts(&s, gve_gstrings_main_stats[i]);
104
105 for (i = 0; i < priv->rx_cfg.num_queues; i++)
106 for (j = 0; j < NUM_GVE_RX_CNTS; j++)
107 ethtool_sprintf(&s, gve_gstrings_rx_stats[j],
108 i);
109
110 for (i = 0; i < num_tx_queues; i++)
111 for (j = 0; j < NUM_GVE_TX_CNTS; j++)
112 ethtool_sprintf(&s, gve_gstrings_tx_stats[j],
113 i);
114
115 for (i = 0; i < ARRAY_SIZE(gve_gstrings_adminq_stats); i++)
116 ethtool_cpy(&s, gve_gstrings_adminq_stats[i]);
117
118 break;
119
120 case ETH_SS_PRIV_FLAGS:
121 for (i = 0; i < ARRAY_SIZE(gve_gstrings_priv_flags); i++)
122 ethtool_puts(&s, gve_gstrings_priv_flags[i]);
123 break;
124
125 default:
126 break;
127 }
128 }
129
gve_get_sset_count(struct net_device * netdev,int sset)130 static int gve_get_sset_count(struct net_device *netdev, int sset)
131 {
132 struct gve_priv *priv = netdev_priv(netdev);
133 int num_tx_queues;
134
135 num_tx_queues = gve_num_tx_queues(priv);
136 switch (sset) {
137 case ETH_SS_STATS:
138 return GVE_MAIN_STATS_LEN + GVE_ADMINQ_STATS_LEN +
139 (priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) +
140 (num_tx_queues * NUM_GVE_TX_CNTS);
141 case ETH_SS_PRIV_FLAGS:
142 return GVE_PRIV_FLAGS_STR_LEN;
143 default:
144 return -EOPNOTSUPP;
145 }
146 }
147
148 static void
gve_get_ethtool_stats(struct net_device * netdev,struct ethtool_stats * stats,u64 * data)149 gve_get_ethtool_stats(struct net_device *netdev,
150 struct ethtool_stats *stats, u64 *data)
151 {
152 u64 tmp_rx_pkts, tmp_rx_hsplit_pkt, tmp_rx_bytes, tmp_rx_hsplit_bytes,
153 tmp_rx_skb_alloc_fail, tmp_rx_buf_alloc_fail,
154 tmp_rx_desc_err_dropped_pkt, tmp_rx_hsplit_unsplit_pkt,
155 tmp_tx_pkts, tmp_tx_bytes;
156 u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_hsplit_unsplit_pkt,
157 rx_pkts, rx_hsplit_pkt, rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes,
158 tx_dropped;
159 int stats_idx, base_stats_idx, max_stats_idx;
160 struct stats *report_stats;
161 int *rx_qid_to_stats_idx;
162 int *tx_qid_to_stats_idx;
163 int num_stopped_rxqs = 0;
164 int num_stopped_txqs = 0;
165 struct gve_priv *priv;
166 bool skip_nic_stats;
167 unsigned int start;
168 int num_tx_queues;
169 int ring;
170 int i, j;
171
172 ASSERT_RTNL();
173
174 priv = netdev_priv(netdev);
175 num_tx_queues = gve_num_tx_queues(priv);
176 report_stats = priv->stats_report->stats;
177 rx_qid_to_stats_idx = kmalloc_array(priv->rx_cfg.num_queues,
178 sizeof(int), GFP_KERNEL);
179 if (!rx_qid_to_stats_idx)
180 return;
181 for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) {
182 rx_qid_to_stats_idx[ring] = -1;
183 if (!gve_rx_was_added_to_block(priv, ring))
184 num_stopped_rxqs++;
185 }
186 tx_qid_to_stats_idx = kmalloc_array(num_tx_queues,
187 sizeof(int), GFP_KERNEL);
188 if (!tx_qid_to_stats_idx) {
189 kfree(rx_qid_to_stats_idx);
190 return;
191 }
192 for (ring = 0; ring < num_tx_queues; ring++) {
193 tx_qid_to_stats_idx[ring] = -1;
194 if (!gve_tx_was_added_to_block(priv, ring))
195 num_stopped_txqs++;
196 }
197
198 for (rx_pkts = 0, rx_bytes = 0, rx_hsplit_pkt = 0,
199 rx_skb_alloc_fail = 0, rx_buf_alloc_fail = 0,
200 rx_desc_err_dropped_pkt = 0, rx_hsplit_unsplit_pkt = 0,
201 ring = 0;
202 ring < priv->rx_cfg.num_queues; ring++) {
203 if (priv->rx) {
204 do {
205 struct gve_rx_ring *rx = &priv->rx[ring];
206
207 start =
208 u64_stats_fetch_begin(&priv->rx[ring].statss);
209 tmp_rx_pkts = rx->rpackets;
210 tmp_rx_hsplit_pkt = rx->rx_hsplit_pkt;
211 tmp_rx_bytes = rx->rbytes;
212 tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail;
213 tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail;
214 tmp_rx_desc_err_dropped_pkt =
215 rx->rx_desc_err_dropped_pkt;
216 tmp_rx_hsplit_unsplit_pkt =
217 rx->rx_hsplit_unsplit_pkt;
218 } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
219 start));
220 rx_pkts += tmp_rx_pkts;
221 rx_hsplit_pkt += tmp_rx_hsplit_pkt;
222 rx_bytes += tmp_rx_bytes;
223 rx_skb_alloc_fail += tmp_rx_skb_alloc_fail;
224 rx_buf_alloc_fail += tmp_rx_buf_alloc_fail;
225 rx_desc_err_dropped_pkt += tmp_rx_desc_err_dropped_pkt;
226 rx_hsplit_unsplit_pkt += tmp_rx_hsplit_unsplit_pkt;
227 }
228 }
229 for (tx_pkts = 0, tx_bytes = 0, tx_dropped = 0, ring = 0;
230 ring < num_tx_queues; ring++) {
231 if (priv->tx) {
232 do {
233 start =
234 u64_stats_fetch_begin(&priv->tx[ring].statss);
235 tmp_tx_pkts = priv->tx[ring].pkt_done;
236 tmp_tx_bytes = priv->tx[ring].bytes_done;
237 } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
238 start));
239 tx_pkts += tmp_tx_pkts;
240 tx_bytes += tmp_tx_bytes;
241 tx_dropped += priv->tx[ring].dropped_pkt;
242 }
243 }
244
245 i = 0;
246 data[i++] = rx_pkts;
247 data[i++] = rx_hsplit_pkt;
248 data[i++] = tx_pkts;
249 data[i++] = rx_bytes;
250 data[i++] = tx_bytes;
251 /* total rx dropped packets */
252 data[i++] = rx_skb_alloc_fail + rx_buf_alloc_fail +
253 rx_desc_err_dropped_pkt;
254 data[i++] = tx_dropped;
255 data[i++] = priv->tx_timeo_cnt;
256 data[i++] = rx_skb_alloc_fail;
257 data[i++] = rx_buf_alloc_fail;
258 data[i++] = rx_desc_err_dropped_pkt;
259 data[i++] = rx_hsplit_unsplit_pkt;
260 data[i++] = priv->interface_up_cnt;
261 data[i++] = priv->interface_down_cnt;
262 data[i++] = priv->reset_cnt;
263 data[i++] = priv->page_alloc_fail;
264 data[i++] = priv->dma_mapping_error;
265 data[i++] = priv->stats_report_trigger_cnt;
266 i = GVE_MAIN_STATS_LEN;
267
268 /* For rx cross-reporting stats, start from nic rx stats in report */
269 base_stats_idx = GVE_TX_STATS_REPORT_NUM * num_tx_queues +
270 GVE_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues;
271 /* The boundary between driver stats and NIC stats shifts if there are
272 * stopped queues.
273 */
274 base_stats_idx += NIC_RX_STATS_REPORT_NUM * num_stopped_rxqs +
275 NIC_TX_STATS_REPORT_NUM * num_stopped_txqs;
276 max_stats_idx = NIC_RX_STATS_REPORT_NUM *
277 (priv->rx_cfg.num_queues - num_stopped_rxqs) +
278 base_stats_idx;
279 /* Preprocess the stats report for rx, map queue id to start index */
280 skip_nic_stats = false;
281 for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
282 stats_idx += NIC_RX_STATS_REPORT_NUM) {
283 u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
284 u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
285
286 if (stat_name == 0) {
287 /* no stats written by NIC yet */
288 skip_nic_stats = true;
289 break;
290 }
291 if (queue_id < 0 || queue_id >= priv->rx_cfg.num_queues) {
292 net_err_ratelimited("Invalid rxq id in NIC stats\n");
293 continue;
294 }
295 rx_qid_to_stats_idx[queue_id] = stats_idx;
296 }
297 /* walk RX rings */
298 if (priv->rx) {
299 for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) {
300 struct gve_rx_ring *rx = &priv->rx[ring];
301
302 data[i++] = rx->fill_cnt;
303 data[i++] = rx->cnt;
304 data[i++] = rx->fill_cnt - rx->cnt;
305 do {
306 start =
307 u64_stats_fetch_begin(&priv->rx[ring].statss);
308 tmp_rx_bytes = rx->rbytes;
309 tmp_rx_hsplit_bytes = rx->rx_hsplit_bytes;
310 tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail;
311 tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail;
312 tmp_rx_desc_err_dropped_pkt =
313 rx->rx_desc_err_dropped_pkt;
314 } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
315 start));
316 data[i++] = tmp_rx_bytes;
317 data[i++] = tmp_rx_hsplit_bytes;
318 data[i++] = rx->rx_cont_packet_cnt;
319 data[i++] = rx->rx_frag_flip_cnt;
320 data[i++] = rx->rx_frag_copy_cnt;
321 data[i++] = rx->rx_frag_alloc_cnt;
322 /* rx dropped packets */
323 data[i++] = tmp_rx_skb_alloc_fail +
324 tmp_rx_buf_alloc_fail +
325 tmp_rx_desc_err_dropped_pkt;
326 data[i++] = rx->rx_copybreak_pkt;
327 data[i++] = rx->rx_copied_pkt;
328 /* stats from NIC */
329 stats_idx = rx_qid_to_stats_idx[ring];
330 if (skip_nic_stats || stats_idx < 0) {
331 /* skip NIC rx stats */
332 i += NIC_RX_STATS_REPORT_NUM;
333 } else {
334 for (j = 0; j < NIC_RX_STATS_REPORT_NUM; j++) {
335 u64 value =
336 be64_to_cpu(report_stats[stats_idx + j].value);
337
338 data[i++] = value;
339 }
340 }
341 /* XDP rx counters */
342 do {
343 start = u64_stats_fetch_begin(&priv->rx[ring].statss);
344 for (j = 0; j < GVE_XDP_ACTIONS; j++)
345 data[i + j] = rx->xdp_actions[j];
346 data[i + j++] = rx->xdp_tx_errors;
347 data[i + j++] = rx->xdp_redirect_errors;
348 data[i + j++] = rx->xdp_alloc_fails;
349 } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
350 start));
351 i += GVE_XDP_ACTIONS + 3; /* XDP rx counters */
352 }
353 } else {
354 i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS;
355 }
356
357 /* For tx cross-reporting stats, start from nic tx stats in report */
358 base_stats_idx = max_stats_idx;
359 max_stats_idx = NIC_TX_STATS_REPORT_NUM *
360 (num_tx_queues - num_stopped_txqs) +
361 max_stats_idx;
362 /* Preprocess the stats report for tx, map queue id to start index */
363 skip_nic_stats = false;
364 for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
365 stats_idx += NIC_TX_STATS_REPORT_NUM) {
366 u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
367 u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
368
369 if (stat_name == 0) {
370 /* no stats written by NIC yet */
371 skip_nic_stats = true;
372 break;
373 }
374 if (queue_id < 0 || queue_id >= num_tx_queues) {
375 net_err_ratelimited("Invalid txq id in NIC stats\n");
376 continue;
377 }
378 tx_qid_to_stats_idx[queue_id] = stats_idx;
379 }
380 /* walk TX rings */
381 if (priv->tx) {
382 for (ring = 0; ring < num_tx_queues; ring++) {
383 struct gve_tx_ring *tx = &priv->tx[ring];
384
385 if (gve_is_gqi(priv)) {
386 data[i++] = tx->req;
387 data[i++] = tx->done;
388 data[i++] = tx->req - tx->done;
389 } else {
390 /* DQO doesn't currently support
391 * posted/completed descriptor counts;
392 */
393 data[i++] = 0;
394 data[i++] = 0;
395 data[i++] =
396 (tx->dqo_tx.tail - tx->dqo_tx.head) &
397 tx->mask;
398 }
399 do {
400 start =
401 u64_stats_fetch_begin(&priv->tx[ring].statss);
402 tmp_tx_bytes = tx->bytes_done;
403 } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
404 start));
405 data[i++] = tmp_tx_bytes;
406 data[i++] = tx->wake_queue;
407 data[i++] = tx->stop_queue;
408 data[i++] = gve_tx_load_event_counter(priv, tx);
409 data[i++] = tx->dma_mapping_error;
410 /* stats from NIC */
411 stats_idx = tx_qid_to_stats_idx[ring];
412 if (skip_nic_stats || stats_idx < 0) {
413 /* skip NIC tx stats */
414 i += NIC_TX_STATS_REPORT_NUM;
415 } else {
416 for (j = 0; j < NIC_TX_STATS_REPORT_NUM; j++) {
417 u64 value =
418 be64_to_cpu(report_stats[stats_idx + j].value);
419 data[i++] = value;
420 }
421 }
422 /* XDP counters */
423 do {
424 start = u64_stats_fetch_begin(&priv->tx[ring].statss);
425 data[i] = tx->xdp_xsk_sent;
426 data[i + 1] = tx->xdp_xmit;
427 data[i + 2] = tx->xdp_xmit_errors;
428 } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
429 start));
430 i += 3; /* XDP tx counters */
431 }
432 } else {
433 i += num_tx_queues * NUM_GVE_TX_CNTS;
434 }
435
436 kfree(rx_qid_to_stats_idx);
437 kfree(tx_qid_to_stats_idx);
438 /* AQ Stats */
439 data[i++] = priv->adminq_prod_cnt;
440 data[i++] = priv->adminq_cmd_fail;
441 data[i++] = priv->adminq_timeouts;
442 data[i++] = priv->adminq_describe_device_cnt;
443 data[i++] = priv->adminq_cfg_device_resources_cnt;
444 data[i++] = priv->adminq_register_page_list_cnt;
445 data[i++] = priv->adminq_unregister_page_list_cnt;
446 data[i++] = priv->adminq_create_tx_queue_cnt;
447 data[i++] = priv->adminq_create_rx_queue_cnt;
448 data[i++] = priv->adminq_destroy_tx_queue_cnt;
449 data[i++] = priv->adminq_destroy_rx_queue_cnt;
450 data[i++] = priv->adminq_dcfg_device_resources_cnt;
451 data[i++] = priv->adminq_set_driver_parameter_cnt;
452 data[i++] = priv->adminq_report_stats_cnt;
453 data[i++] = priv->adminq_report_link_speed_cnt;
454 data[i++] = priv->adminq_get_ptype_map_cnt;
455 data[i++] = priv->adminq_query_flow_rules_cnt;
456 data[i++] = priv->adminq_cfg_flow_rule_cnt;
457 data[i++] = priv->adminq_cfg_rss_cnt;
458 data[i++] = priv->adminq_query_rss_cnt;
459 data[i++] = priv->adminq_report_nic_timestamp_cnt;
460 }
461
gve_get_channels(struct net_device * netdev,struct ethtool_channels * cmd)462 static void gve_get_channels(struct net_device *netdev,
463 struct ethtool_channels *cmd)
464 {
465 struct gve_priv *priv = netdev_priv(netdev);
466
467 cmd->max_rx = priv->rx_cfg.max_queues;
468 cmd->max_tx = priv->tx_cfg.max_queues;
469 cmd->max_other = 0;
470 cmd->max_combined = 0;
471 cmd->rx_count = priv->rx_cfg.num_queues;
472 cmd->tx_count = priv->tx_cfg.num_queues;
473 cmd->other_count = 0;
474 cmd->combined_count = 0;
475 }
476
gve_set_channels(struct net_device * netdev,struct ethtool_channels * cmd)477 static int gve_set_channels(struct net_device *netdev,
478 struct ethtool_channels *cmd)
479 {
480 struct gve_priv *priv = netdev_priv(netdev);
481 struct gve_tx_queue_config new_tx_cfg = priv->tx_cfg;
482 struct gve_rx_queue_config new_rx_cfg = priv->rx_cfg;
483 struct ethtool_channels old_settings;
484 int new_tx = cmd->tx_count;
485 int new_rx = cmd->rx_count;
486 bool reset_rss = false;
487
488 gve_get_channels(netdev, &old_settings);
489
490 /* Changing combined is not allowed */
491 if (cmd->combined_count != old_settings.combined_count)
492 return -EINVAL;
493
494 if (!new_rx || !new_tx)
495 return -EINVAL;
496
497 if (priv->xdp_prog) {
498 if (new_tx != new_rx ||
499 (2 * new_tx > priv->tx_cfg.max_queues)) {
500 dev_err(&priv->pdev->dev, "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 when XDP program is installed");
501 return -EINVAL;
502 }
503
504 /* One XDP TX queue per RX queue. */
505 new_tx_cfg.num_xdp_queues = new_rx;
506 } else {
507 new_tx_cfg.num_xdp_queues = 0;
508 }
509
510 if (new_rx != priv->rx_cfg.num_queues &&
511 priv->cache_rss_config && !netif_is_rxfh_configured(netdev))
512 reset_rss = true;
513
514 new_tx_cfg.num_queues = new_tx;
515 new_rx_cfg.num_queues = new_rx;
516
517 return gve_adjust_queues(priv, new_rx_cfg, new_tx_cfg, reset_rss);
518 }
519
gve_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * cmd,struct kernel_ethtool_ringparam * kernel_cmd,struct netlink_ext_ack * extack)520 static void gve_get_ringparam(struct net_device *netdev,
521 struct ethtool_ringparam *cmd,
522 struct kernel_ethtool_ringparam *kernel_cmd,
523 struct netlink_ext_ack *extack)
524 {
525 struct gve_priv *priv = netdev_priv(netdev);
526
527 cmd->rx_max_pending = priv->max_rx_desc_cnt;
528 cmd->tx_max_pending = priv->max_tx_desc_cnt;
529 cmd->rx_pending = priv->rx_desc_cnt;
530 cmd->tx_pending = priv->tx_desc_cnt;
531
532 if (!gve_header_split_supported(priv))
533 kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_UNKNOWN;
534 else if (priv->header_split_enabled)
535 kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED;
536 else
537 kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_DISABLED;
538 }
539
gve_adjust_ring_sizes(struct gve_priv * priv,u16 new_tx_desc_cnt,u16 new_rx_desc_cnt)540 static int gve_adjust_ring_sizes(struct gve_priv *priv,
541 u16 new_tx_desc_cnt,
542 u16 new_rx_desc_cnt)
543 {
544 struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0};
545 struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0};
546 int err;
547
548 /* get current queue configuration */
549 gve_get_curr_alloc_cfgs(priv, &tx_alloc_cfg, &rx_alloc_cfg);
550
551 /* copy over the new ring_size from ethtool */
552 tx_alloc_cfg.ring_size = new_tx_desc_cnt;
553 rx_alloc_cfg.ring_size = new_rx_desc_cnt;
554
555 if (netif_running(priv->dev)) {
556 err = gve_adjust_config(priv, &tx_alloc_cfg, &rx_alloc_cfg);
557 if (err)
558 return err;
559 }
560
561 /* Set new ring_size for the next up */
562 priv->tx_desc_cnt = new_tx_desc_cnt;
563 priv->rx_desc_cnt = new_rx_desc_cnt;
564
565 return 0;
566 }
567
gve_validate_req_ring_size(struct gve_priv * priv,u16 new_tx_desc_cnt,u16 new_rx_desc_cnt)568 static int gve_validate_req_ring_size(struct gve_priv *priv, u16 new_tx_desc_cnt,
569 u16 new_rx_desc_cnt)
570 {
571 /* check for valid range */
572 if (new_tx_desc_cnt < priv->min_tx_desc_cnt ||
573 new_tx_desc_cnt > priv->max_tx_desc_cnt ||
574 new_rx_desc_cnt < priv->min_rx_desc_cnt ||
575 new_rx_desc_cnt > priv->max_rx_desc_cnt) {
576 dev_err(&priv->pdev->dev, "Requested descriptor count out of range\n");
577 return -EINVAL;
578 }
579
580 if (!is_power_of_2(new_tx_desc_cnt) || !is_power_of_2(new_rx_desc_cnt)) {
581 dev_err(&priv->pdev->dev, "Requested descriptor count has to be a power of 2\n");
582 return -EINVAL;
583 }
584 return 0;
585 }
586
gve_set_ringparam(struct net_device * netdev,struct ethtool_ringparam * cmd,struct kernel_ethtool_ringparam * kernel_cmd,struct netlink_ext_ack * extack)587 static int gve_set_ringparam(struct net_device *netdev,
588 struct ethtool_ringparam *cmd,
589 struct kernel_ethtool_ringparam *kernel_cmd,
590 struct netlink_ext_ack *extack)
591 {
592 struct gve_priv *priv = netdev_priv(netdev);
593 u16 new_tx_cnt, new_rx_cnt;
594 int err;
595
596 err = gve_set_hsplit_config(priv, kernel_cmd->tcp_data_split);
597 if (err)
598 return err;
599
600 if (cmd->tx_pending == priv->tx_desc_cnt && cmd->rx_pending == priv->rx_desc_cnt)
601 return 0;
602
603 if (!priv->modify_ring_size_enabled) {
604 dev_err(&priv->pdev->dev, "Modify ring size is not supported.\n");
605 return -EOPNOTSUPP;
606 }
607
608 new_tx_cnt = cmd->tx_pending;
609 new_rx_cnt = cmd->rx_pending;
610
611 if (gve_validate_req_ring_size(priv, new_tx_cnt, new_rx_cnt))
612 return -EINVAL;
613
614 return gve_adjust_ring_sizes(priv, new_tx_cnt, new_rx_cnt);
615 }
616
gve_user_reset(struct net_device * netdev,u32 * flags)617 static int gve_user_reset(struct net_device *netdev, u32 *flags)
618 {
619 struct gve_priv *priv = netdev_priv(netdev);
620
621 if (*flags == ETH_RESET_ALL) {
622 *flags = 0;
623 return gve_reset(priv, true);
624 }
625
626 return -EOPNOTSUPP;
627 }
628
gve_get_tunable(struct net_device * netdev,const struct ethtool_tunable * etuna,void * value)629 static int gve_get_tunable(struct net_device *netdev,
630 const struct ethtool_tunable *etuna, void *value)
631 {
632 struct gve_priv *priv = netdev_priv(netdev);
633
634 switch (etuna->id) {
635 case ETHTOOL_RX_COPYBREAK:
636 *(u32 *)value = priv->rx_copybreak;
637 return 0;
638 default:
639 return -EOPNOTSUPP;
640 }
641 }
642
gve_set_tunable(struct net_device * netdev,const struct ethtool_tunable * etuna,const void * value)643 static int gve_set_tunable(struct net_device *netdev,
644 const struct ethtool_tunable *etuna,
645 const void *value)
646 {
647 struct gve_priv *priv = netdev_priv(netdev);
648 u32 len;
649
650 switch (etuna->id) {
651 case ETHTOOL_RX_COPYBREAK:
652 {
653 u32 max_copybreak = priv->rx_cfg.packet_buffer_size;
654
655 len = *(u32 *)value;
656 if (len > max_copybreak)
657 return -EINVAL;
658 priv->rx_copybreak = len;
659 return 0;
660 }
661 default:
662 return -EOPNOTSUPP;
663 }
664 }
665
gve_get_priv_flags(struct net_device * netdev)666 static u32 gve_get_priv_flags(struct net_device *netdev)
667 {
668 struct gve_priv *priv = netdev_priv(netdev);
669 u32 ret_flags = 0;
670
671 /* Only 1 flag exists currently: report-stats (BIT(0)), so set that flag. */
672 if (priv->ethtool_flags & BIT(0))
673 ret_flags |= BIT(0);
674 return ret_flags;
675 }
676
gve_set_priv_flags(struct net_device * netdev,u32 flags)677 static int gve_set_priv_flags(struct net_device *netdev, u32 flags)
678 {
679 struct gve_priv *priv = netdev_priv(netdev);
680 u64 ori_flags, new_flags;
681 int num_tx_queues;
682
683 num_tx_queues = gve_num_tx_queues(priv);
684 ori_flags = READ_ONCE(priv->ethtool_flags);
685 new_flags = ori_flags;
686
687 /* Only one priv flag exists: report-stats (BIT(0))*/
688 if (flags & BIT(0))
689 new_flags |= BIT(0);
690 else
691 new_flags &= ~(BIT(0));
692 priv->ethtool_flags = new_flags;
693 /* start report-stats timer when user turns report stats on. */
694 if (flags & BIT(0)) {
695 mod_timer(&priv->stats_report_timer,
696 round_jiffies(jiffies +
697 msecs_to_jiffies(priv->stats_report_timer_period)));
698 }
699 /* Zero off gve stats when report-stats turned off and */
700 /* delete report stats timer. */
701 if (!(flags & BIT(0)) && (ori_flags & BIT(0))) {
702 int tx_stats_num = GVE_TX_STATS_REPORT_NUM *
703 num_tx_queues;
704 int rx_stats_num = GVE_RX_STATS_REPORT_NUM *
705 priv->rx_cfg.num_queues;
706
707 memset(priv->stats_report->stats, 0, (tx_stats_num + rx_stats_num) *
708 sizeof(struct stats));
709 timer_delete_sync(&priv->stats_report_timer);
710 }
711 return 0;
712 }
713
gve_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)714 static int gve_get_link_ksettings(struct net_device *netdev,
715 struct ethtool_link_ksettings *cmd)
716 {
717 struct gve_priv *priv = netdev_priv(netdev);
718 int err = 0;
719
720 if (priv->link_speed == 0)
721 err = gve_adminq_report_link_speed(priv);
722
723 cmd->base.speed = priv->link_speed;
724
725 cmd->base.duplex = DUPLEX_FULL;
726
727 return err;
728 }
729
gve_get_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_ec,struct netlink_ext_ack * extack)730 static int gve_get_coalesce(struct net_device *netdev,
731 struct ethtool_coalesce *ec,
732 struct kernel_ethtool_coalesce *kernel_ec,
733 struct netlink_ext_ack *extack)
734 {
735 struct gve_priv *priv = netdev_priv(netdev);
736
737 if (gve_is_gqi(priv))
738 return -EOPNOTSUPP;
739 ec->tx_coalesce_usecs = priv->tx_coalesce_usecs;
740 ec->rx_coalesce_usecs = priv->rx_coalesce_usecs;
741
742 return 0;
743 }
744
gve_set_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_ec,struct netlink_ext_ack * extack)745 static int gve_set_coalesce(struct net_device *netdev,
746 struct ethtool_coalesce *ec,
747 struct kernel_ethtool_coalesce *kernel_ec,
748 struct netlink_ext_ack *extack)
749 {
750 struct gve_priv *priv = netdev_priv(netdev);
751 u32 tx_usecs_orig = priv->tx_coalesce_usecs;
752 u32 rx_usecs_orig = priv->rx_coalesce_usecs;
753 int idx;
754
755 if (gve_is_gqi(priv))
756 return -EOPNOTSUPP;
757
758 if (ec->tx_coalesce_usecs > GVE_MAX_ITR_INTERVAL_DQO ||
759 ec->rx_coalesce_usecs > GVE_MAX_ITR_INTERVAL_DQO)
760 return -EINVAL;
761 priv->tx_coalesce_usecs = ec->tx_coalesce_usecs;
762 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
763
764 if (tx_usecs_orig != priv->tx_coalesce_usecs) {
765 for (idx = 0; idx < priv->tx_cfg.num_queues; idx++) {
766 int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx);
767 struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
768
769 gve_set_itr_coalesce_usecs_dqo(priv, block,
770 priv->tx_coalesce_usecs);
771 }
772 }
773
774 if (rx_usecs_orig != priv->rx_coalesce_usecs) {
775 for (idx = 0; idx < priv->rx_cfg.num_queues; idx++) {
776 int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx);
777 struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
778
779 gve_set_itr_coalesce_usecs_dqo(priv, block,
780 priv->rx_coalesce_usecs);
781 }
782 }
783
784 return 0;
785 }
786
gve_set_rxnfc(struct net_device * netdev,struct ethtool_rxnfc * cmd)787 static int gve_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
788 {
789 struct gve_priv *priv = netdev_priv(netdev);
790 int err = 0;
791
792 if (!(netdev->features & NETIF_F_NTUPLE))
793 return -EOPNOTSUPP;
794
795 switch (cmd->cmd) {
796 case ETHTOOL_SRXCLSRLINS:
797 err = gve_add_flow_rule(priv, cmd);
798 break;
799 case ETHTOOL_SRXCLSRLDEL:
800 err = gve_del_flow_rule(priv, cmd);
801 break;
802 default:
803 err = -EOPNOTSUPP;
804 break;
805 }
806
807 return err;
808 }
809
gve_get_rxnfc(struct net_device * netdev,struct ethtool_rxnfc * cmd,u32 * rule_locs)810 static int gve_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd, u32 *rule_locs)
811 {
812 struct gve_priv *priv = netdev_priv(netdev);
813 int err = 0;
814
815 switch (cmd->cmd) {
816 case ETHTOOL_GRXRINGS:
817 cmd->data = priv->rx_cfg.num_queues;
818 break;
819 case ETHTOOL_GRXCLSRLCNT:
820 if (!priv->max_flow_rules)
821 return -EOPNOTSUPP;
822
823 err = gve_adminq_query_flow_rules(priv, GVE_FLOW_RULE_QUERY_STATS, 0);
824 if (err)
825 return err;
826
827 cmd->rule_cnt = priv->num_flow_rules;
828 cmd->data = priv->max_flow_rules;
829 break;
830 case ETHTOOL_GRXCLSRULE:
831 err = gve_get_flow_rule_entry(priv, cmd);
832 break;
833 case ETHTOOL_GRXCLSRLALL:
834 err = gve_get_flow_rule_ids(priv, cmd, (u32 *)rule_locs);
835 break;
836 default:
837 err = -EOPNOTSUPP;
838 break;
839 }
840
841 return err;
842 }
843
gve_get_rxfh_key_size(struct net_device * netdev)844 static u32 gve_get_rxfh_key_size(struct net_device *netdev)
845 {
846 struct gve_priv *priv = netdev_priv(netdev);
847
848 return priv->rss_key_size;
849 }
850
gve_get_rxfh_indir_size(struct net_device * netdev)851 static u32 gve_get_rxfh_indir_size(struct net_device *netdev)
852 {
853 struct gve_priv *priv = netdev_priv(netdev);
854
855 return priv->rss_lut_size;
856 }
857
gve_get_rss_config_cache(struct gve_priv * priv,struct ethtool_rxfh_param * rxfh)858 static void gve_get_rss_config_cache(struct gve_priv *priv,
859 struct ethtool_rxfh_param *rxfh)
860 {
861 struct gve_rss_config *rss_config = &priv->rss_config;
862
863 rxfh->hfunc = ETH_RSS_HASH_TOP;
864
865 if (rxfh->key) {
866 rxfh->key_size = priv->rss_key_size;
867 memcpy(rxfh->key, rss_config->hash_key, priv->rss_key_size);
868 }
869
870 if (rxfh->indir) {
871 rxfh->indir_size = priv->rss_lut_size;
872 memcpy(rxfh->indir, rss_config->hash_lut,
873 priv->rss_lut_size * sizeof(*rxfh->indir));
874 }
875 }
876
gve_get_rxfh(struct net_device * netdev,struct ethtool_rxfh_param * rxfh)877 static int gve_get_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rxfh)
878 {
879 struct gve_priv *priv = netdev_priv(netdev);
880
881 if (!priv->rss_key_size || !priv->rss_lut_size)
882 return -EOPNOTSUPP;
883
884 if (priv->cache_rss_config) {
885 gve_get_rss_config_cache(priv, rxfh);
886 return 0;
887 }
888
889 return gve_adminq_query_rss_config(priv, rxfh);
890 }
891
gve_set_rss_config_cache(struct gve_priv * priv,struct ethtool_rxfh_param * rxfh)892 static void gve_set_rss_config_cache(struct gve_priv *priv,
893 struct ethtool_rxfh_param *rxfh)
894 {
895 struct gve_rss_config *rss_config = &priv->rss_config;
896
897 if (rxfh->key)
898 memcpy(rss_config->hash_key, rxfh->key, priv->rss_key_size);
899
900 if (rxfh->indir)
901 memcpy(rss_config->hash_lut, rxfh->indir,
902 priv->rss_lut_size * sizeof(*rxfh->indir));
903 }
904
gve_set_rxfh(struct net_device * netdev,struct ethtool_rxfh_param * rxfh,struct netlink_ext_ack * extack)905 static int gve_set_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rxfh,
906 struct netlink_ext_ack *extack)
907 {
908 struct gve_priv *priv = netdev_priv(netdev);
909 int err;
910
911 if (!priv->rss_key_size || !priv->rss_lut_size)
912 return -EOPNOTSUPP;
913
914 err = gve_adminq_configure_rss(priv, rxfh);
915 if (err) {
916 NL_SET_ERR_MSG_MOD(extack, "Fail to configure RSS config");
917 return err;
918 }
919
920 if (priv->cache_rss_config)
921 gve_set_rss_config_cache(priv, rxfh);
922
923 return 0;
924 }
925
gve_get_ts_info(struct net_device * netdev,struct kernel_ethtool_ts_info * info)926 static int gve_get_ts_info(struct net_device *netdev,
927 struct kernel_ethtool_ts_info *info)
928 {
929 struct gve_priv *priv = netdev_priv(netdev);
930
931 ethtool_op_get_ts_info(netdev, info);
932
933 if (priv->nic_timestamp_supported) {
934 info->so_timestamping |= SOF_TIMESTAMPING_RX_HARDWARE |
935 SOF_TIMESTAMPING_RAW_HARDWARE;
936
937 info->rx_filters |= BIT(HWTSTAMP_FILTER_NONE) |
938 BIT(HWTSTAMP_FILTER_ALL);
939
940 if (priv->ptp)
941 info->phc_index = ptp_clock_index(priv->ptp->clock);
942 }
943
944 return 0;
945 }
946
947 const struct ethtool_ops gve_ethtool_ops = {
948 .supported_coalesce_params = ETHTOOL_COALESCE_USECS,
949 .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT,
950 .get_drvinfo = gve_get_drvinfo,
951 .get_strings = gve_get_strings,
952 .get_sset_count = gve_get_sset_count,
953 .get_ethtool_stats = gve_get_ethtool_stats,
954 .set_msglevel = gve_set_msglevel,
955 .get_msglevel = gve_get_msglevel,
956 .set_channels = gve_set_channels,
957 .get_channels = gve_get_channels,
958 .set_rxnfc = gve_set_rxnfc,
959 .get_rxnfc = gve_get_rxnfc,
960 .get_rxfh_indir_size = gve_get_rxfh_indir_size,
961 .get_rxfh_key_size = gve_get_rxfh_key_size,
962 .get_rxfh = gve_get_rxfh,
963 .set_rxfh = gve_set_rxfh,
964 .get_link = ethtool_op_get_link,
965 .get_coalesce = gve_get_coalesce,
966 .set_coalesce = gve_set_coalesce,
967 .get_ringparam = gve_get_ringparam,
968 .set_ringparam = gve_set_ringparam,
969 .reset = gve_user_reset,
970 .get_tunable = gve_get_tunable,
971 .set_tunable = gve_set_tunable,
972 .get_priv_flags = gve_get_priv_flags,
973 .set_priv_flags = gve_set_priv_flags,
974 .get_link_ksettings = gve_get_link_ksettings,
975 .get_ts_info = gve_get_ts_info,
976 };
977