1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4 /* ethtool support for i40evf */
5 #include "i40evf.h"
6
7 #include <linux/uaccess.h>
8
9 struct i40evf_stats {
10 char stat_string[ETH_GSTRING_LEN];
11 int stat_offset;
12 };
13
14 #define I40EVF_STAT(_name, _stat) { \
15 .stat_string = _name, \
16 .stat_offset = offsetof(struct i40evf_adapter, _stat) \
17 }
18
19 /* All stats are u64, so we don't need to track the size of the field. */
20 static const struct i40evf_stats i40evf_gstrings_stats[] = {
21 I40EVF_STAT("rx_bytes", current_stats.rx_bytes),
22 I40EVF_STAT("rx_unicast", current_stats.rx_unicast),
23 I40EVF_STAT("rx_multicast", current_stats.rx_multicast),
24 I40EVF_STAT("rx_broadcast", current_stats.rx_broadcast),
25 I40EVF_STAT("rx_discards", current_stats.rx_discards),
26 I40EVF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
27 I40EVF_STAT("tx_bytes", current_stats.tx_bytes),
28 I40EVF_STAT("tx_unicast", current_stats.tx_unicast),
29 I40EVF_STAT("tx_multicast", current_stats.tx_multicast),
30 I40EVF_STAT("tx_broadcast", current_stats.tx_broadcast),
31 I40EVF_STAT("tx_discards", current_stats.tx_discards),
32 I40EVF_STAT("tx_errors", current_stats.tx_errors),
33 };
34
35 #define I40EVF_GLOBAL_STATS_LEN ARRAY_SIZE(i40evf_gstrings_stats)
36 #define I40EVF_QUEUE_STATS_LEN(_dev) \
37 (((struct i40evf_adapter *)\
38 netdev_priv(_dev))->num_active_queues \
39 * 2 * (sizeof(struct i40e_queue_stats) / sizeof(u64)))
40 #define I40EVF_STATS_LEN(_dev) \
41 (I40EVF_GLOBAL_STATS_LEN + I40EVF_QUEUE_STATS_LEN(_dev))
42
43 /* For now we have one and only one private flag and it is only defined
44 * when we have support for the SKIP_CPU_SYNC DMA attribute. Instead
45 * of leaving all this code sitting around empty we will strip it unless
46 * our one private flag is actually available.
47 */
48 struct i40evf_priv_flags {
49 char flag_string[ETH_GSTRING_LEN];
50 u32 flag;
51 bool read_only;
52 };
53
54 #define I40EVF_PRIV_FLAG(_name, _flag, _read_only) { \
55 .flag_string = _name, \
56 .flag = _flag, \
57 .read_only = _read_only, \
58 }
59
60 static const struct i40evf_priv_flags i40evf_gstrings_priv_flags[] = {
61 I40EVF_PRIV_FLAG("legacy-rx", I40EVF_FLAG_LEGACY_RX, 0),
62 };
63
64 #define I40EVF_PRIV_FLAGS_STR_LEN ARRAY_SIZE(i40evf_gstrings_priv_flags)
65
66 /**
67 * i40evf_get_link_ksettings - Get Link Speed and Duplex settings
68 * @netdev: network interface device structure
69 * @cmd: ethtool command
70 *
71 * Reports speed/duplex settings. Because this is a VF, we don't know what
72 * kind of link we really have, so we fake it.
73 **/
i40evf_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)74 static int i40evf_get_link_ksettings(struct net_device *netdev,
75 struct ethtool_link_ksettings *cmd)
76 {
77 struct i40evf_adapter *adapter = netdev_priv(netdev);
78
79 ethtool_link_ksettings_zero_link_mode(cmd, supported);
80 cmd->base.autoneg = AUTONEG_DISABLE;
81 cmd->base.port = PORT_NONE;
82 /* Set speed and duplex */
83 switch (adapter->link_speed) {
84 case I40E_LINK_SPEED_40GB:
85 cmd->base.speed = SPEED_40000;
86 break;
87 case I40E_LINK_SPEED_25GB:
88 #ifdef SPEED_25000
89 cmd->base.speed = SPEED_25000;
90 #else
91 netdev_info(netdev,
92 "Speed is 25G, display not supported by this version of ethtool.\n");
93 #endif
94 break;
95 case I40E_LINK_SPEED_20GB:
96 cmd->base.speed = SPEED_20000;
97 break;
98 case I40E_LINK_SPEED_10GB:
99 cmd->base.speed = SPEED_10000;
100 break;
101 case I40E_LINK_SPEED_1GB:
102 cmd->base.speed = SPEED_1000;
103 break;
104 case I40E_LINK_SPEED_100MB:
105 cmd->base.speed = SPEED_100;
106 break;
107 default:
108 break;
109 }
110 cmd->base.duplex = DUPLEX_FULL;
111
112 return 0;
113 }
114
115 /**
116 * i40evf_get_sset_count - Get length of string set
117 * @netdev: network interface device structure
118 * @sset: id of string set
119 *
120 * Reports size of string table. This driver only supports
121 * strings for statistics.
122 **/
i40evf_get_sset_count(struct net_device * netdev,int sset)123 static int i40evf_get_sset_count(struct net_device *netdev, int sset)
124 {
125 if (sset == ETH_SS_STATS)
126 return I40EVF_STATS_LEN(netdev);
127 else if (sset == ETH_SS_PRIV_FLAGS)
128 return I40EVF_PRIV_FLAGS_STR_LEN;
129 else
130 return -EINVAL;
131 }
132
133 /**
134 * i40evf_get_ethtool_stats - report device statistics
135 * @netdev: network interface device structure
136 * @stats: ethtool statistics structure
137 * @data: pointer to data buffer
138 *
139 * All statistics are added to the data buffer as an array of u64.
140 **/
i40evf_get_ethtool_stats(struct net_device * netdev,struct ethtool_stats * stats,u64 * data)141 static void i40evf_get_ethtool_stats(struct net_device *netdev,
142 struct ethtool_stats *stats, u64 *data)
143 {
144 struct i40evf_adapter *adapter = netdev_priv(netdev);
145 unsigned int i, j;
146 char *p;
147
148 for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
149 p = (char *)adapter + i40evf_gstrings_stats[i].stat_offset;
150 data[i] = *(u64 *)p;
151 }
152 for (j = 0; j < adapter->num_active_queues; j++) {
153 data[i++] = adapter->tx_rings[j].stats.packets;
154 data[i++] = adapter->tx_rings[j].stats.bytes;
155 }
156 for (j = 0; j < adapter->num_active_queues; j++) {
157 data[i++] = adapter->rx_rings[j].stats.packets;
158 data[i++] = adapter->rx_rings[j].stats.bytes;
159 }
160 }
161
162 /**
163 * i40evf_get_strings - Get string set
164 * @netdev: network interface device structure
165 * @sset: id of string set
166 * @data: buffer for string data
167 *
168 * Builds stats string table.
169 **/
i40evf_get_strings(struct net_device * netdev,u32 sset,u8 * data)170 static void i40evf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
171 {
172 struct i40evf_adapter *adapter = netdev_priv(netdev);
173 u8 *p = data;
174 int i;
175
176 if (sset == ETH_SS_STATS) {
177 for (i = 0; i < (int)I40EVF_GLOBAL_STATS_LEN; i++) {
178 memcpy(p, i40evf_gstrings_stats[i].stat_string,
179 ETH_GSTRING_LEN);
180 p += ETH_GSTRING_LEN;
181 }
182 for (i = 0; i < adapter->num_active_queues; i++) {
183 snprintf(p, ETH_GSTRING_LEN, "tx-%u.packets", i);
184 p += ETH_GSTRING_LEN;
185 snprintf(p, ETH_GSTRING_LEN, "tx-%u.bytes", i);
186 p += ETH_GSTRING_LEN;
187 }
188 for (i = 0; i < adapter->num_active_queues; i++) {
189 snprintf(p, ETH_GSTRING_LEN, "rx-%u.packets", i);
190 p += ETH_GSTRING_LEN;
191 snprintf(p, ETH_GSTRING_LEN, "rx-%u.bytes", i);
192 p += ETH_GSTRING_LEN;
193 }
194 } else if (sset == ETH_SS_PRIV_FLAGS) {
195 for (i = 0; i < I40EVF_PRIV_FLAGS_STR_LEN; i++) {
196 snprintf(p, ETH_GSTRING_LEN, "%s",
197 i40evf_gstrings_priv_flags[i].flag_string);
198 p += ETH_GSTRING_LEN;
199 }
200 }
201 }
202
203 /**
204 * i40evf_get_priv_flags - report device private flags
205 * @netdev: network interface device structure
206 *
207 * The get string set count and the string set should be matched for each
208 * flag returned. Add new strings for each flag to the i40e_gstrings_priv_flags
209 * array.
210 *
211 * Returns a u32 bitmap of flags.
212 **/
i40evf_get_priv_flags(struct net_device * netdev)213 static u32 i40evf_get_priv_flags(struct net_device *netdev)
214 {
215 struct i40evf_adapter *adapter = netdev_priv(netdev);
216 u32 i, ret_flags = 0;
217
218 for (i = 0; i < I40EVF_PRIV_FLAGS_STR_LEN; i++) {
219 const struct i40evf_priv_flags *priv_flags;
220
221 priv_flags = &i40evf_gstrings_priv_flags[i];
222
223 if (priv_flags->flag & adapter->flags)
224 ret_flags |= BIT(i);
225 }
226
227 return ret_flags;
228 }
229
230 /**
231 * i40evf_set_priv_flags - set private flags
232 * @netdev: network interface device structure
233 * @flags: bit flags to be set
234 **/
i40evf_set_priv_flags(struct net_device * netdev,u32 flags)235 static int i40evf_set_priv_flags(struct net_device *netdev, u32 flags)
236 {
237 struct i40evf_adapter *adapter = netdev_priv(netdev);
238 u32 orig_flags, new_flags, changed_flags;
239 u32 i;
240
241 orig_flags = READ_ONCE(adapter->flags);
242 new_flags = orig_flags;
243
244 for (i = 0; i < I40EVF_PRIV_FLAGS_STR_LEN; i++) {
245 const struct i40evf_priv_flags *priv_flags;
246
247 priv_flags = &i40evf_gstrings_priv_flags[i];
248
249 if (flags & BIT(i))
250 new_flags |= priv_flags->flag;
251 else
252 new_flags &= ~(priv_flags->flag);
253
254 if (priv_flags->read_only &&
255 ((orig_flags ^ new_flags) & ~BIT(i)))
256 return -EOPNOTSUPP;
257 }
258
259 /* Before we finalize any flag changes, any checks which we need to
260 * perform to determine if the new flags will be supported should go
261 * here...
262 */
263
264 /* Compare and exchange the new flags into place. If we failed, that
265 * is if cmpxchg returns anything but the old value, this means
266 * something else must have modified the flags variable since we
267 * copied it. We'll just punt with an error and log something in the
268 * message buffer.
269 */
270 if (cmpxchg(&adapter->flags, orig_flags, new_flags) != orig_flags) {
271 dev_warn(&adapter->pdev->dev,
272 "Unable to update adapter->flags as it was modified by another thread...\n");
273 return -EAGAIN;
274 }
275
276 changed_flags = orig_flags ^ new_flags;
277
278 /* Process any additional changes needed as a result of flag changes.
279 * The changed_flags value reflects the list of bits that were changed
280 * in the code above.
281 */
282
283 /* issue a reset to force legacy-rx change to take effect */
284 if (changed_flags & I40EVF_FLAG_LEGACY_RX) {
285 if (netif_running(netdev)) {
286 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
287 schedule_work(&adapter->reset_task);
288 }
289 }
290
291 return 0;
292 }
293
294 /**
295 * i40evf_get_msglevel - Get debug message level
296 * @netdev: network interface device structure
297 *
298 * Returns current debug message level.
299 **/
i40evf_get_msglevel(struct net_device * netdev)300 static u32 i40evf_get_msglevel(struct net_device *netdev)
301 {
302 struct i40evf_adapter *adapter = netdev_priv(netdev);
303
304 return adapter->msg_enable;
305 }
306
307 /**
308 * i40evf_set_msglevel - Set debug message level
309 * @netdev: network interface device structure
310 * @data: message level
311 *
312 * Set current debug message level. Higher values cause the driver to
313 * be noisier.
314 **/
i40evf_set_msglevel(struct net_device * netdev,u32 data)315 static void i40evf_set_msglevel(struct net_device *netdev, u32 data)
316 {
317 struct i40evf_adapter *adapter = netdev_priv(netdev);
318
319 if (I40E_DEBUG_USER & data)
320 adapter->hw.debug_mask = data;
321 adapter->msg_enable = data;
322 }
323
324 /**
325 * i40evf_get_drvinfo - Get driver info
326 * @netdev: network interface device structure
327 * @drvinfo: ethool driver info structure
328 *
329 * Returns information about the driver and device for display to the user.
330 **/
i40evf_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * drvinfo)331 static void i40evf_get_drvinfo(struct net_device *netdev,
332 struct ethtool_drvinfo *drvinfo)
333 {
334 struct i40evf_adapter *adapter = netdev_priv(netdev);
335
336 strlcpy(drvinfo->driver, i40evf_driver_name, 32);
337 strlcpy(drvinfo->version, i40evf_driver_version, 32);
338 strlcpy(drvinfo->fw_version, "N/A", 4);
339 strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
340 drvinfo->n_priv_flags = I40EVF_PRIV_FLAGS_STR_LEN;
341 }
342
343 /**
344 * i40evf_get_ringparam - Get ring parameters
345 * @netdev: network interface device structure
346 * @ring: ethtool ringparam structure
347 *
348 * Returns current ring parameters. TX and RX rings are reported separately,
349 * but the number of rings is not reported.
350 **/
i40evf_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)351 static void i40evf_get_ringparam(struct net_device *netdev,
352 struct ethtool_ringparam *ring)
353 {
354 struct i40evf_adapter *adapter = netdev_priv(netdev);
355
356 ring->rx_max_pending = I40EVF_MAX_RXD;
357 ring->tx_max_pending = I40EVF_MAX_TXD;
358 ring->rx_pending = adapter->rx_desc_count;
359 ring->tx_pending = adapter->tx_desc_count;
360 }
361
362 /**
363 * i40evf_set_ringparam - Set ring parameters
364 * @netdev: network interface device structure
365 * @ring: ethtool ringparam structure
366 *
367 * Sets ring parameters. TX and RX rings are controlled separately, but the
368 * number of rings is not specified, so all rings get the same settings.
369 **/
i40evf_set_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)370 static int i40evf_set_ringparam(struct net_device *netdev,
371 struct ethtool_ringparam *ring)
372 {
373 struct i40evf_adapter *adapter = netdev_priv(netdev);
374 u32 new_rx_count, new_tx_count;
375
376 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
377 return -EINVAL;
378
379 new_tx_count = clamp_t(u32, ring->tx_pending,
380 I40EVF_MIN_TXD,
381 I40EVF_MAX_TXD);
382 new_tx_count = ALIGN(new_tx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
383
384 new_rx_count = clamp_t(u32, ring->rx_pending,
385 I40EVF_MIN_RXD,
386 I40EVF_MAX_RXD);
387 new_rx_count = ALIGN(new_rx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
388
389 /* if nothing to do return success */
390 if ((new_tx_count == adapter->tx_desc_count) &&
391 (new_rx_count == adapter->rx_desc_count))
392 return 0;
393
394 adapter->tx_desc_count = new_tx_count;
395 adapter->rx_desc_count = new_rx_count;
396
397 if (netif_running(netdev)) {
398 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
399 schedule_work(&adapter->reset_task);
400 }
401
402 return 0;
403 }
404
405 /**
406 * __i40evf_get_coalesce - get per-queue coalesce settings
407 * @netdev: the netdev to check
408 * @ec: ethtool coalesce data structure
409 * @queue: which queue to pick
410 *
411 * Gets the per-queue settings for coalescence. Specifically Rx and Tx usecs
412 * are per queue. If queue is <0 then we default to queue 0 as the
413 * representative value.
414 **/
__i40evf_get_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec,int queue)415 static int __i40evf_get_coalesce(struct net_device *netdev,
416 struct ethtool_coalesce *ec,
417 int queue)
418 {
419 struct i40evf_adapter *adapter = netdev_priv(netdev);
420 struct i40e_vsi *vsi = &adapter->vsi;
421 struct i40e_ring *rx_ring, *tx_ring;
422
423 ec->tx_max_coalesced_frames = vsi->work_limit;
424 ec->rx_max_coalesced_frames = vsi->work_limit;
425
426 /* Rx and Tx usecs per queue value. If user doesn't specify the
427 * queue, return queue 0's value to represent.
428 */
429 if (queue < 0)
430 queue = 0;
431 else if (queue >= adapter->num_active_queues)
432 return -EINVAL;
433
434 rx_ring = &adapter->rx_rings[queue];
435 tx_ring = &adapter->tx_rings[queue];
436
437 if (ITR_IS_DYNAMIC(rx_ring->itr_setting))
438 ec->use_adaptive_rx_coalesce = 1;
439
440 if (ITR_IS_DYNAMIC(tx_ring->itr_setting))
441 ec->use_adaptive_tx_coalesce = 1;
442
443 ec->rx_coalesce_usecs = rx_ring->itr_setting & ~I40E_ITR_DYNAMIC;
444 ec->tx_coalesce_usecs = tx_ring->itr_setting & ~I40E_ITR_DYNAMIC;
445
446 return 0;
447 }
448
449 /**
450 * i40evf_get_coalesce - Get interrupt coalescing settings
451 * @netdev: network interface device structure
452 * @ec: ethtool coalesce structure
453 *
454 * Returns current coalescing settings. This is referred to elsewhere in the
455 * driver as Interrupt Throttle Rate, as this is how the hardware describes
456 * this functionality. Note that if per-queue settings have been modified this
457 * only represents the settings of queue 0.
458 **/
i40evf_get_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec)459 static int i40evf_get_coalesce(struct net_device *netdev,
460 struct ethtool_coalesce *ec)
461 {
462 return __i40evf_get_coalesce(netdev, ec, -1);
463 }
464
465 /**
466 * i40evf_get_per_queue_coalesce - get coalesce values for specific queue
467 * @netdev: netdev to read
468 * @ec: coalesce settings from ethtool
469 * @queue: the queue to read
470 *
471 * Read specific queue's coalesce settings.
472 **/
i40evf_get_per_queue_coalesce(struct net_device * netdev,u32 queue,struct ethtool_coalesce * ec)473 static int i40evf_get_per_queue_coalesce(struct net_device *netdev,
474 u32 queue,
475 struct ethtool_coalesce *ec)
476 {
477 return __i40evf_get_coalesce(netdev, ec, queue);
478 }
479
480 /**
481 * i40evf_set_itr_per_queue - set ITR values for specific queue
482 * @adapter: the VF adapter struct to set values for
483 * @ec: coalesce settings from ethtool
484 * @queue: the queue to modify
485 *
486 * Change the ITR settings for a specific queue.
487 **/
i40evf_set_itr_per_queue(struct i40evf_adapter * adapter,struct ethtool_coalesce * ec,int queue)488 static void i40evf_set_itr_per_queue(struct i40evf_adapter *adapter,
489 struct ethtool_coalesce *ec,
490 int queue)
491 {
492 struct i40e_ring *rx_ring = &adapter->rx_rings[queue];
493 struct i40e_ring *tx_ring = &adapter->tx_rings[queue];
494 struct i40e_q_vector *q_vector;
495
496 rx_ring->itr_setting = ITR_REG_ALIGN(ec->rx_coalesce_usecs);
497 tx_ring->itr_setting = ITR_REG_ALIGN(ec->tx_coalesce_usecs);
498
499 rx_ring->itr_setting |= I40E_ITR_DYNAMIC;
500 if (!ec->use_adaptive_rx_coalesce)
501 rx_ring->itr_setting ^= I40E_ITR_DYNAMIC;
502
503 tx_ring->itr_setting |= I40E_ITR_DYNAMIC;
504 if (!ec->use_adaptive_tx_coalesce)
505 tx_ring->itr_setting ^= I40E_ITR_DYNAMIC;
506
507 q_vector = rx_ring->q_vector;
508 q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
509
510 q_vector = tx_ring->q_vector;
511 q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
512
513 /* The interrupt handler itself will take care of programming
514 * the Tx and Rx ITR values based on the values we have entered
515 * into the q_vector, no need to write the values now.
516 */
517 }
518
519 /**
520 * __i40evf_set_coalesce - set coalesce settings for particular queue
521 * @netdev: the netdev to change
522 * @ec: ethtool coalesce settings
523 * @queue: the queue to change
524 *
525 * Sets the coalesce settings for a particular queue.
526 **/
__i40evf_set_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec,int queue)527 static int __i40evf_set_coalesce(struct net_device *netdev,
528 struct ethtool_coalesce *ec,
529 int queue)
530 {
531 struct i40evf_adapter *adapter = netdev_priv(netdev);
532 struct i40e_vsi *vsi = &adapter->vsi;
533 int i;
534
535 if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
536 vsi->work_limit = ec->tx_max_coalesced_frames_irq;
537
538 if (ec->rx_coalesce_usecs == 0) {
539 if (ec->use_adaptive_rx_coalesce)
540 netif_info(adapter, drv, netdev, "rx-usecs=0, need to disable adaptive-rx for a complete disable\n");
541 } else if ((ec->rx_coalesce_usecs < I40E_MIN_ITR) ||
542 (ec->rx_coalesce_usecs > I40E_MAX_ITR)) {
543 netif_info(adapter, drv, netdev, "Invalid value, rx-usecs range is 0-8160\n");
544 return -EINVAL;
545 }
546
547 else
548 if (ec->tx_coalesce_usecs == 0) {
549 if (ec->use_adaptive_tx_coalesce)
550 netif_info(adapter, drv, netdev, "tx-usecs=0, need to disable adaptive-tx for a complete disable\n");
551 } else if ((ec->tx_coalesce_usecs < I40E_MIN_ITR) ||
552 (ec->tx_coalesce_usecs > I40E_MAX_ITR)) {
553 netif_info(adapter, drv, netdev, "Invalid value, tx-usecs range is 0-8160\n");
554 return -EINVAL;
555 }
556
557 /* Rx and Tx usecs has per queue value. If user doesn't specify the
558 * queue, apply to all queues.
559 */
560 if (queue < 0) {
561 for (i = 0; i < adapter->num_active_queues; i++)
562 i40evf_set_itr_per_queue(adapter, ec, i);
563 } else if (queue < adapter->num_active_queues) {
564 i40evf_set_itr_per_queue(adapter, ec, queue);
565 } else {
566 netif_info(adapter, drv, netdev, "Invalid queue value, queue range is 0 - %d\n",
567 adapter->num_active_queues - 1);
568 return -EINVAL;
569 }
570
571 return 0;
572 }
573
574 /**
575 * i40evf_set_coalesce - Set interrupt coalescing settings
576 * @netdev: network interface device structure
577 * @ec: ethtool coalesce structure
578 *
579 * Change current coalescing settings for every queue.
580 **/
i40evf_set_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec)581 static int i40evf_set_coalesce(struct net_device *netdev,
582 struct ethtool_coalesce *ec)
583 {
584 return __i40evf_set_coalesce(netdev, ec, -1);
585 }
586
587 /**
588 * i40evf_set_per_queue_coalesce - set specific queue's coalesce settings
589 * @netdev: the netdev to change
590 * @ec: ethtool's coalesce settings
591 * @queue: the queue to modify
592 *
593 * Modifies a specific queue's coalesce settings.
594 */
i40evf_set_per_queue_coalesce(struct net_device * netdev,u32 queue,struct ethtool_coalesce * ec)595 static int i40evf_set_per_queue_coalesce(struct net_device *netdev,
596 u32 queue,
597 struct ethtool_coalesce *ec)
598 {
599 return __i40evf_set_coalesce(netdev, ec, queue);
600 }
601
602 /**
603 * i40evf_get_rxnfc - command to get RX flow classification rules
604 * @netdev: network interface device structure
605 * @cmd: ethtool rxnfc command
606 * @rule_locs: pointer to store rule locations
607 *
608 * Returns Success if the command is supported.
609 **/
i40evf_get_rxnfc(struct net_device * netdev,struct ethtool_rxnfc * cmd,u32 * rule_locs)610 static int i40evf_get_rxnfc(struct net_device *netdev,
611 struct ethtool_rxnfc *cmd,
612 u32 *rule_locs)
613 {
614 struct i40evf_adapter *adapter = netdev_priv(netdev);
615 int ret = -EOPNOTSUPP;
616
617 switch (cmd->cmd) {
618 case ETHTOOL_GRXRINGS:
619 cmd->data = adapter->num_active_queues;
620 ret = 0;
621 break;
622 case ETHTOOL_GRXFH:
623 netdev_info(netdev,
624 "RSS hash info is not available to vf, use pf.\n");
625 break;
626 default:
627 break;
628 }
629
630 return ret;
631 }
632 /**
633 * i40evf_get_channels: get the number of channels supported by the device
634 * @netdev: network interface device structure
635 * @ch: channel information structure
636 *
637 * For the purposes of our device, we only use combined channels, i.e. a tx/rx
638 * queue pair. Report one extra channel to match our "other" MSI-X vector.
639 **/
i40evf_get_channels(struct net_device * netdev,struct ethtool_channels * ch)640 static void i40evf_get_channels(struct net_device *netdev,
641 struct ethtool_channels *ch)
642 {
643 struct i40evf_adapter *adapter = netdev_priv(netdev);
644
645 /* Report maximum channels */
646 ch->max_combined = I40EVF_MAX_REQ_QUEUES;
647
648 ch->max_other = NONQ_VECS;
649 ch->other_count = NONQ_VECS;
650
651 ch->combined_count = adapter->num_active_queues;
652 }
653
654 /**
655 * i40evf_set_channels: set the new channel count
656 * @netdev: network interface device structure
657 * @ch: channel information structure
658 *
659 * Negotiate a new number of channels with the PF then do a reset. During
660 * reset we'll realloc queues and fix the RSS table. Returns 0 on success,
661 * negative on failure.
662 **/
i40evf_set_channels(struct net_device * netdev,struct ethtool_channels * ch)663 static int i40evf_set_channels(struct net_device *netdev,
664 struct ethtool_channels *ch)
665 {
666 struct i40evf_adapter *adapter = netdev_priv(netdev);
667 int num_req = ch->combined_count;
668
669 if (num_req != adapter->num_active_queues &&
670 !(adapter->vf_res->vf_cap_flags &
671 VIRTCHNL_VF_OFFLOAD_REQ_QUEUES)) {
672 dev_info(&adapter->pdev->dev, "PF is not capable of queue negotiation.\n");
673 return -EINVAL;
674 }
675
676 if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
677 adapter->num_tc) {
678 dev_info(&adapter->pdev->dev, "Cannot set channels since ADq is enabled.\n");
679 return -EINVAL;
680 }
681
682 /* All of these should have already been checked by ethtool before this
683 * even gets to us, but just to be sure.
684 */
685 if (num_req <= 0 || num_req > I40EVF_MAX_REQ_QUEUES)
686 return -EINVAL;
687
688 if (ch->rx_count || ch->tx_count || ch->other_count != NONQ_VECS)
689 return -EINVAL;
690
691 adapter->num_req_queues = num_req;
692 return i40evf_request_queues(adapter, num_req);
693 }
694
695 /**
696 * i40evf_get_rxfh_key_size - get the RSS hash key size
697 * @netdev: network interface device structure
698 *
699 * Returns the table size.
700 **/
i40evf_get_rxfh_key_size(struct net_device * netdev)701 static u32 i40evf_get_rxfh_key_size(struct net_device *netdev)
702 {
703 struct i40evf_adapter *adapter = netdev_priv(netdev);
704
705 return adapter->rss_key_size;
706 }
707
708 /**
709 * i40evf_get_rxfh_indir_size - get the rx flow hash indirection table size
710 * @netdev: network interface device structure
711 *
712 * Returns the table size.
713 **/
i40evf_get_rxfh_indir_size(struct net_device * netdev)714 static u32 i40evf_get_rxfh_indir_size(struct net_device *netdev)
715 {
716 struct i40evf_adapter *adapter = netdev_priv(netdev);
717
718 return adapter->rss_lut_size;
719 }
720
721 /**
722 * i40evf_get_rxfh - get the rx flow hash indirection table
723 * @netdev: network interface device structure
724 * @indir: indirection table
725 * @key: hash key
726 * @hfunc: hash function in use
727 *
728 * Reads the indirection table directly from the hardware. Always returns 0.
729 **/
i40evf_get_rxfh(struct net_device * netdev,u32 * indir,u8 * key,u8 * hfunc)730 static int i40evf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
731 u8 *hfunc)
732 {
733 struct i40evf_adapter *adapter = netdev_priv(netdev);
734 u16 i;
735
736 if (hfunc)
737 *hfunc = ETH_RSS_HASH_TOP;
738 if (!indir)
739 return 0;
740
741 memcpy(key, adapter->rss_key, adapter->rss_key_size);
742
743 /* Each 32 bits pointed by 'indir' is stored with a lut entry */
744 for (i = 0; i < adapter->rss_lut_size; i++)
745 indir[i] = (u32)adapter->rss_lut[i];
746
747 return 0;
748 }
749
750 /**
751 * i40evf_set_rxfh - set the rx flow hash indirection table
752 * @netdev: network interface device structure
753 * @indir: indirection table
754 * @key: hash key
755 * @hfunc: hash function to use
756 *
757 * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
758 * returns 0 after programming the table.
759 **/
i40evf_set_rxfh(struct net_device * netdev,const u32 * indir,const u8 * key,const u8 hfunc)760 static int i40evf_set_rxfh(struct net_device *netdev, const u32 *indir,
761 const u8 *key, const u8 hfunc)
762 {
763 struct i40evf_adapter *adapter = netdev_priv(netdev);
764 u16 i;
765
766 /* We do not allow change in unsupported parameters */
767 if (key ||
768 (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
769 return -EOPNOTSUPP;
770 if (!indir)
771 return 0;
772
773 if (key) {
774 memcpy(adapter->rss_key, key, adapter->rss_key_size);
775 }
776
777 /* Each 32 bits pointed by 'indir' is stored with a lut entry */
778 for (i = 0; i < adapter->rss_lut_size; i++)
779 adapter->rss_lut[i] = (u8)(indir[i]);
780
781 return i40evf_config_rss(adapter);
782 }
783
784 static const struct ethtool_ops i40evf_ethtool_ops = {
785 .get_drvinfo = i40evf_get_drvinfo,
786 .get_link = ethtool_op_get_link,
787 .get_ringparam = i40evf_get_ringparam,
788 .set_ringparam = i40evf_set_ringparam,
789 .get_strings = i40evf_get_strings,
790 .get_ethtool_stats = i40evf_get_ethtool_stats,
791 .get_sset_count = i40evf_get_sset_count,
792 .get_priv_flags = i40evf_get_priv_flags,
793 .set_priv_flags = i40evf_set_priv_flags,
794 .get_msglevel = i40evf_get_msglevel,
795 .set_msglevel = i40evf_set_msglevel,
796 .get_coalesce = i40evf_get_coalesce,
797 .set_coalesce = i40evf_set_coalesce,
798 .get_per_queue_coalesce = i40evf_get_per_queue_coalesce,
799 .set_per_queue_coalesce = i40evf_set_per_queue_coalesce,
800 .get_rxnfc = i40evf_get_rxnfc,
801 .get_rxfh_indir_size = i40evf_get_rxfh_indir_size,
802 .get_rxfh = i40evf_get_rxfh,
803 .set_rxfh = i40evf_set_rxfh,
804 .get_channels = i40evf_get_channels,
805 .set_channels = i40evf_set_channels,
806 .get_rxfh_key_size = i40evf_get_rxfh_key_size,
807 .get_link_ksettings = i40evf_get_link_ksettings,
808 };
809
810 /**
811 * i40evf_set_ethtool_ops - Initialize ethtool ops struct
812 * @netdev: network interface device structure
813 *
814 * Sets ethtool ops struct in our netdev so that ethtool can call
815 * our functions.
816 **/
i40evf_set_ethtool_ops(struct net_device * netdev)817 void i40evf_set_ethtool_ops(struct net_device *netdev)
818 {
819 netdev->ethtool_ops = &i40evf_ethtool_ops;
820 }
821
