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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4/* ethtool support for iavf */
5#include "iavf.h"
6
7#include <linux/uaccess.h>
8
9/* ethtool statistics helpers */
10
11/**
12 * struct iavf_stats - definition for an ethtool statistic
13 * @stat_string: statistic name to display in ethtool -S output
14 * @sizeof_stat: the sizeof() the stat, must be no greater than sizeof(u64)
15 * @stat_offset: offsetof() the stat from a base pointer
16 *
17 * This structure defines a statistic to be added to the ethtool stats buffer.
18 * It defines a statistic as offset from a common base pointer. Stats should
19 * be defined in constant arrays using the IAVF_STAT macro, with every element
20 * of the array using the same _type for calculating the sizeof_stat and
21 * stat_offset.
22 *
23 * The @sizeof_stat is expected to be sizeof(u8), sizeof(u16), sizeof(u32) or
24 * sizeof(u64). Other sizes are not expected and will produce a WARN_ONCE from
25 * the iavf_add_ethtool_stat() helper function.
26 *
27 * The @stat_string is interpreted as a format string, allowing formatted
28 * values to be inserted while looping over multiple structures for a given
29 * statistics array. Thus, every statistic string in an array should have the
30 * same type and number of format specifiers, to be formatted by variadic
31 * arguments to the iavf_add_stat_string() helper function.
32 **/
33struct iavf_stats {
34 char stat_string[ETH_GSTRING_LEN];
35 int sizeof_stat;
36 int stat_offset;
37};
38
39/* Helper macro to define an iavf_stat structure with proper size and type.
40 * Use this when defining constant statistics arrays. Note that @_type expects
41 * only a type name and is used multiple times.
42 */
43#define IAVF_STAT(_type, _name, _stat) { \
44 .stat_string = _name, \
45 .sizeof_stat = sizeof_field(_type, _stat), \
46 .stat_offset = offsetof(_type, _stat) \
47}
48
49/* Helper macro for defining some statistics related to queues */
50#define IAVF_QUEUE_STAT(_name, _stat) \
51 IAVF_STAT(struct iavf_ring, _name, _stat)
52
53/* Stats associated with a Tx or Rx ring */
54static const struct iavf_stats iavf_gstrings_queue_stats[] = {
55 IAVF_QUEUE_STAT("%s-%u.packets", stats.packets),
56 IAVF_QUEUE_STAT("%s-%u.bytes", stats.bytes),
57};
58
59/**
60 * iavf_add_one_ethtool_stat - copy the stat into the supplied buffer
61 * @data: location to store the stat value
62 * @pointer: basis for where to copy from
63 * @stat: the stat definition
64 *
65 * Copies the stat data defined by the pointer and stat structure pair into
66 * the memory supplied as data. Used to implement iavf_add_ethtool_stats and
67 * iavf_add_queue_stats. If the pointer is null, data will be zero'd.
68 */
69static void
70iavf_add_one_ethtool_stat(u64 *data, void *pointer,
71 const struct iavf_stats *stat)
72{
73 char *p;
74
75 if (!pointer) {
76 /* ensure that the ethtool data buffer is zero'd for any stats
77 * which don't have a valid pointer.
78 */
79 *data = 0;
80 return;
81 }
82
83 p = (char *)pointer + stat->stat_offset;
84 switch (stat->sizeof_stat) {
85 case sizeof(u64):
86 *data = *((u64 *)p);
87 break;
88 case sizeof(u32):
89 *data = *((u32 *)p);
90 break;
91 case sizeof(u16):
92 *data = *((u16 *)p);
93 break;
94 case sizeof(u8):
95 *data = *((u8 *)p);
96 break;
97 default:
98 WARN_ONCE(1, "unexpected stat size for %s",
99 stat->stat_string);
100 *data = 0;
101 }
102}
103
104/**
105 * __iavf_add_ethtool_stats - copy stats into the ethtool supplied buffer
106 * @data: ethtool stats buffer
107 * @pointer: location to copy stats from
108 * @stats: array of stats to copy
109 * @size: the size of the stats definition
110 *
111 * Copy the stats defined by the stats array using the pointer as a base into
112 * the data buffer supplied by ethtool. Updates the data pointer to point to
113 * the next empty location for successive calls to __iavf_add_ethtool_stats.
114 * If pointer is null, set the data values to zero and update the pointer to
115 * skip these stats.
116 **/
117static void
118__iavf_add_ethtool_stats(u64 **data, void *pointer,
119 const struct iavf_stats stats[],
120 const unsigned int size)
121{
122 unsigned int i;
123
124 for (i = 0; i < size; i++)
125 iavf_add_one_ethtool_stat((*data)++, pointer, &stats[i]);
126}
127
128/**
129 * iavf_add_ethtool_stats - copy stats into ethtool supplied buffer
130 * @data: ethtool stats buffer
131 * @pointer: location where stats are stored
132 * @stats: static const array of stat definitions
133 *
134 * Macro to ease the use of __iavf_add_ethtool_stats by taking a static
135 * constant stats array and passing the ARRAY_SIZE(). This avoids typos by
136 * ensuring that we pass the size associated with the given stats array.
137 *
138 * The parameter @stats is evaluated twice, so parameters with side effects
139 * should be avoided.
140 **/
141#define iavf_add_ethtool_stats(data, pointer, stats) \
142 __iavf_add_ethtool_stats(data, pointer, stats, ARRAY_SIZE(stats))
143
144/**
145 * iavf_add_queue_stats - copy queue statistics into supplied buffer
146 * @data: ethtool stats buffer
147 * @ring: the ring to copy
148 *
149 * Queue statistics must be copied while protected by
150 * u64_stats_fetch_begin_irq, so we can't directly use iavf_add_ethtool_stats.
151 * Assumes that queue stats are defined in iavf_gstrings_queue_stats. If the
152 * ring pointer is null, zero out the queue stat values and update the data
153 * pointer. Otherwise safely copy the stats from the ring into the supplied
154 * buffer and update the data pointer when finished.
155 *
156 * This function expects to be called while under rcu_read_lock().
157 **/
158static void
159iavf_add_queue_stats(u64 **data, struct iavf_ring *ring)
160{
161 const unsigned int size = ARRAY_SIZE(iavf_gstrings_queue_stats);
162 const struct iavf_stats *stats = iavf_gstrings_queue_stats;
163 unsigned int start;
164 unsigned int i;
165
166 /* To avoid invalid statistics values, ensure that we keep retrying
167 * the copy until we get a consistent value according to
168 * u64_stats_fetch_retry_irq. But first, make sure our ring is
169 * non-null before attempting to access its syncp.
170 */
171 do {
172 start = !ring ? 0 : u64_stats_fetch_begin_irq(&ring->syncp);
173 for (i = 0; i < size; i++)
174 iavf_add_one_ethtool_stat(&(*data)[i], ring, &stats[i]);
175 } while (ring && u64_stats_fetch_retry_irq(&ring->syncp, start));
176
177 /* Once we successfully copy the stats in, update the data pointer */
178 *data += size;
179}
180
181/**
182 * __iavf_add_stat_strings - copy stat strings into ethtool buffer
183 * @p: ethtool supplied buffer
184 * @stats: stat definitions array
185 * @size: size of the stats array
186 *
187 * Format and copy the strings described by stats into the buffer pointed at
188 * by p.
189 **/
190static void __iavf_add_stat_strings(u8 **p, const struct iavf_stats stats[],
191 const unsigned int size, ...)
192{
193 unsigned int i;
194
195 for (i = 0; i < size; i++) {
196 va_list args;
197
198 va_start(args, size);
199 vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
200 *p += ETH_GSTRING_LEN;
201 va_end(args);
202 }
203}
204
205/**
206 * iavf_add_stat_strings - copy stat strings into ethtool buffer
207 * @p: ethtool supplied buffer
208 * @stats: stat definitions array
209 *
210 * Format and copy the strings described by the const static stats value into
211 * the buffer pointed at by p.
212 *
213 * The parameter @stats is evaluated twice, so parameters with side effects
214 * should be avoided. Additionally, stats must be an array such that
215 * ARRAY_SIZE can be called on it.
216 **/
217#define iavf_add_stat_strings(p, stats, ...) \
218 __iavf_add_stat_strings(p, stats, ARRAY_SIZE(stats), ## __VA_ARGS__)
219
220#define VF_STAT(_name, _stat) \
221 IAVF_STAT(struct iavf_adapter, _name, _stat)
222
223static const struct iavf_stats iavf_gstrings_stats[] = {
224 VF_STAT("rx_bytes", current_stats.rx_bytes),
225 VF_STAT("rx_unicast", current_stats.rx_unicast),
226 VF_STAT("rx_multicast", current_stats.rx_multicast),
227 VF_STAT("rx_broadcast", current_stats.rx_broadcast),
228 VF_STAT("rx_discards", current_stats.rx_discards),
229 VF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
230 VF_STAT("tx_bytes", current_stats.tx_bytes),
231 VF_STAT("tx_unicast", current_stats.tx_unicast),
232 VF_STAT("tx_multicast", current_stats.tx_multicast),
233 VF_STAT("tx_broadcast", current_stats.tx_broadcast),
234 VF_STAT("tx_discards", current_stats.tx_discards),
235 VF_STAT("tx_errors", current_stats.tx_errors),
236};
237
238#define IAVF_STATS_LEN ARRAY_SIZE(iavf_gstrings_stats)
239
240#define IAVF_QUEUE_STATS_LEN ARRAY_SIZE(iavf_gstrings_queue_stats)
241
242/* For now we have one and only one private flag and it is only defined
243 * when we have support for the SKIP_CPU_SYNC DMA attribute. Instead
244 * of leaving all this code sitting around empty we will strip it unless
245 * our one private flag is actually available.
246 */
247struct iavf_priv_flags {
248 char flag_string[ETH_GSTRING_LEN];
249 u32 flag;
250 bool read_only;
251};
252
253#define IAVF_PRIV_FLAG(_name, _flag, _read_only) { \
254 .flag_string = _name, \
255 .flag = _flag, \
256 .read_only = _read_only, \
257}
258
259static const struct iavf_priv_flags iavf_gstrings_priv_flags[] = {
260 IAVF_PRIV_FLAG("legacy-rx", IAVF_FLAG_LEGACY_RX, 0),
261};
262
263#define IAVF_PRIV_FLAGS_STR_LEN ARRAY_SIZE(iavf_gstrings_priv_flags)
264
265/**
266 * iavf_get_link_ksettings - Get Link Speed and Duplex settings
267 * @netdev: network interface device structure
268 * @cmd: ethtool command
269 *
270 * Reports speed/duplex settings. Because this is a VF, we don't know what
271 * kind of link we really have, so we fake it.
272 **/
273static int iavf_get_link_ksettings(struct net_device *netdev,
274 struct ethtool_link_ksettings *cmd)
275{
276 struct iavf_adapter *adapter = netdev_priv(netdev);
277
278 ethtool_link_ksettings_zero_link_mode(cmd, supported);
279 cmd->base.autoneg = AUTONEG_DISABLE;
280 cmd->base.port = PORT_NONE;
281 cmd->base.duplex = DUPLEX_FULL;
282
283 if (ADV_LINK_SUPPORT(adapter)) {
284 if (adapter->link_speed_mbps &&
285 adapter->link_speed_mbps < U32_MAX)
286 cmd->base.speed = adapter->link_speed_mbps;
287 else
288 cmd->base.speed = SPEED_UNKNOWN;
289
290 return 0;
291 }
292
293 switch (adapter->link_speed) {
294 case VIRTCHNL_LINK_SPEED_40GB:
295 cmd->base.speed = SPEED_40000;
296 break;
297 case VIRTCHNL_LINK_SPEED_25GB:
298 cmd->base.speed = SPEED_25000;
299 break;
300 case VIRTCHNL_LINK_SPEED_20GB:
301 cmd->base.speed = SPEED_20000;
302 break;
303 case VIRTCHNL_LINK_SPEED_10GB:
304 cmd->base.speed = SPEED_10000;
305 break;
306 case VIRTCHNL_LINK_SPEED_5GB:
307 cmd->base.speed = SPEED_5000;
308 break;
309 case VIRTCHNL_LINK_SPEED_2_5GB:
310 cmd->base.speed = SPEED_2500;
311 break;
312 case VIRTCHNL_LINK_SPEED_1GB:
313 cmd->base.speed = SPEED_1000;
314 break;
315 case VIRTCHNL_LINK_SPEED_100MB:
316 cmd->base.speed = SPEED_100;
317 break;
318 default:
319 break;
320 }
321
322 return 0;
323}
324
325/**
326 * iavf_get_sset_count - Get length of string set
327 * @netdev: network interface device structure
328 * @sset: id of string set
329 *
330 * Reports size of various string tables.
331 **/
332static int iavf_get_sset_count(struct net_device *netdev, int sset)
333{
334 if (sset == ETH_SS_STATS)
335 return IAVF_STATS_LEN +
336 (IAVF_QUEUE_STATS_LEN * 2 * IAVF_MAX_REQ_QUEUES);
337 else if (sset == ETH_SS_PRIV_FLAGS)
338 return IAVF_PRIV_FLAGS_STR_LEN;
339 else
340 return -EINVAL;
341}
342
343/**
344 * iavf_get_ethtool_stats - report device statistics
345 * @netdev: network interface device structure
346 * @stats: ethtool statistics structure
347 * @data: pointer to data buffer
348 *
349 * All statistics are added to the data buffer as an array of u64.
350 **/
351static void iavf_get_ethtool_stats(struct net_device *netdev,
352 struct ethtool_stats *stats, u64 *data)
353{
354 struct iavf_adapter *adapter = netdev_priv(netdev);
355 unsigned int i;
356
357 iavf_add_ethtool_stats(&data, adapter, iavf_gstrings_stats);
358
359 rcu_read_lock();
360 for (i = 0; i < IAVF_MAX_REQ_QUEUES; i++) {
361 struct iavf_ring *ring;
362
363 /* Avoid accessing un-allocated queues */
364 ring = (i < adapter->num_active_queues ?
365 &adapter->tx_rings[i] : NULL);
366 iavf_add_queue_stats(&data, ring);
367
368 /* Avoid accessing un-allocated queues */
369 ring = (i < adapter->num_active_queues ?
370 &adapter->rx_rings[i] : NULL);
371 iavf_add_queue_stats(&data, ring);
372 }
373 rcu_read_unlock();
374}
375
376/**
377 * iavf_get_priv_flag_strings - Get private flag strings
378 * @netdev: network interface device structure
379 * @data: buffer for string data
380 *
381 * Builds the private flags string table
382 **/
383static void iavf_get_priv_flag_strings(struct net_device *netdev, u8 *data)
384{
385 unsigned int i;
386
387 for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
388 snprintf(data, ETH_GSTRING_LEN, "%s",
389 iavf_gstrings_priv_flags[i].flag_string);
390 data += ETH_GSTRING_LEN;
391 }
392}
393
394/**
395 * iavf_get_stat_strings - Get stat strings
396 * @netdev: network interface device structure
397 * @data: buffer for string data
398 *
399 * Builds the statistics string table
400 **/
401static void iavf_get_stat_strings(struct net_device *netdev, u8 *data)
402{
403 unsigned int i;
404
405 iavf_add_stat_strings(&data, iavf_gstrings_stats);
406
407 /* Queues are always allocated in pairs, so we just use num_tx_queues
408 * for both Tx and Rx queues.
409 */
410 for (i = 0; i < netdev->num_tx_queues; i++) {
411 iavf_add_stat_strings(&data, iavf_gstrings_queue_stats,
412 "tx", i);
413 iavf_add_stat_strings(&data, iavf_gstrings_queue_stats,
414 "rx", i);
415 }
416}
417
418/**
419 * iavf_get_strings - Get string set
420 * @netdev: network interface device structure
421 * @sset: id of string set
422 * @data: buffer for string data
423 *
424 * Builds string tables for various string sets
425 **/
426static void iavf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
427{
428 switch (sset) {
429 case ETH_SS_STATS:
430 iavf_get_stat_strings(netdev, data);
431 break;
432 case ETH_SS_PRIV_FLAGS:
433 iavf_get_priv_flag_strings(netdev, data);
434 break;
435 default:
436 break;
437 }
438}
439
440/**
441 * iavf_get_priv_flags - report device private flags
442 * @netdev: network interface device structure
443 *
444 * The get string set count and the string set should be matched for each
445 * flag returned. Add new strings for each flag to the iavf_gstrings_priv_flags
446 * array.
447 *
448 * Returns a u32 bitmap of flags.
449 **/
450static u32 iavf_get_priv_flags(struct net_device *netdev)
451{
452 struct iavf_adapter *adapter = netdev_priv(netdev);
453 u32 i, ret_flags = 0;
454
455 for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
456 const struct iavf_priv_flags *priv_flags;
457
458 priv_flags = &iavf_gstrings_priv_flags[i];
459
460 if (priv_flags->flag & adapter->flags)
461 ret_flags |= BIT(i);
462 }
463
464 return ret_flags;
465}
466
467/**
468 * iavf_set_priv_flags - set private flags
469 * @netdev: network interface device structure
470 * @flags: bit flags to be set
471 **/
472static int iavf_set_priv_flags(struct net_device *netdev, u32 flags)
473{
474 struct iavf_adapter *adapter = netdev_priv(netdev);
475 u32 orig_flags, new_flags, changed_flags;
476 u32 i;
477
478 orig_flags = READ_ONCE(adapter->flags);
479 new_flags = orig_flags;
480
481 for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
482 const struct iavf_priv_flags *priv_flags;
483
484 priv_flags = &iavf_gstrings_priv_flags[i];
485
486 if (flags & BIT(i))
487 new_flags |= priv_flags->flag;
488 else
489 new_flags &= ~(priv_flags->flag);
490
491 if (priv_flags->read_only &&
492 ((orig_flags ^ new_flags) & ~BIT(i)))
493 return -EOPNOTSUPP;
494 }
495
496 /* Before we finalize any flag changes, any checks which we need to
497 * perform to determine if the new flags will be supported should go
498 * here...
499 */
500
501 /* Compare and exchange the new flags into place. If we failed, that
502 * is if cmpxchg returns anything but the old value, this means
503 * something else must have modified the flags variable since we
504 * copied it. We'll just punt with an error and log something in the
505 * message buffer.
506 */
507 if (cmpxchg(&adapter->flags, orig_flags, new_flags) != orig_flags) {
508 dev_warn(&adapter->pdev->dev,
509 "Unable to update adapter->flags as it was modified by another thread...\n");
510 return -EAGAIN;
511 }
512
513 changed_flags = orig_flags ^ new_flags;
514
515 /* Process any additional changes needed as a result of flag changes.
516 * The changed_flags value reflects the list of bits that were changed
517 * in the code above.
518 */
519
520 /* issue a reset to force legacy-rx change to take effect */
521 if (changed_flags & IAVF_FLAG_LEGACY_RX) {
522 if (netif_running(netdev)) {
523 adapter->flags |= IAVF_FLAG_RESET_NEEDED;
524 queue_work(iavf_wq, &adapter->reset_task);
525 }
526 }
527
528 return 0;
529}
530
531/**
532 * iavf_get_msglevel - Get debug message level
533 * @netdev: network interface device structure
534 *
535 * Returns current debug message level.
536 **/
537static u32 iavf_get_msglevel(struct net_device *netdev)
538{
539 struct iavf_adapter *adapter = netdev_priv(netdev);
540
541 return adapter->msg_enable;
542}
543
544/**
545 * iavf_set_msglevel - Set debug message level
546 * @netdev: network interface device structure
547 * @data: message level
548 *
549 * Set current debug message level. Higher values cause the driver to
550 * be noisier.
551 **/
552static void iavf_set_msglevel(struct net_device *netdev, u32 data)
553{
554 struct iavf_adapter *adapter = netdev_priv(netdev);
555
556 if (IAVF_DEBUG_USER & data)
557 adapter->hw.debug_mask = data;
558 adapter->msg_enable = data;
559}
560
561/**
562 * iavf_get_drvinfo - Get driver info
563 * @netdev: network interface device structure
564 * @drvinfo: ethool driver info structure
565 *
566 * Returns information about the driver and device for display to the user.
567 **/
568static void iavf_get_drvinfo(struct net_device *netdev,
569 struct ethtool_drvinfo *drvinfo)
570{
571 struct iavf_adapter *adapter = netdev_priv(netdev);
572
573 strlcpy(drvinfo->driver, iavf_driver_name, 32);
574 strlcpy(drvinfo->fw_version, "N/A", 4);
575 strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
576 drvinfo->n_priv_flags = IAVF_PRIV_FLAGS_STR_LEN;
577}
578
579/**
580 * iavf_get_ringparam - Get ring parameters
581 * @netdev: network interface device structure
582 * @ring: ethtool ringparam structure
583 *
584 * Returns current ring parameters. TX and RX rings are reported separately,
585 * but the number of rings is not reported.
586 **/
587static void iavf_get_ringparam(struct net_device *netdev,
588 struct ethtool_ringparam *ring)
589{
590 struct iavf_adapter *adapter = netdev_priv(netdev);
591
592 ring->rx_max_pending = IAVF_MAX_RXD;
593 ring->tx_max_pending = IAVF_MAX_TXD;
594 ring->rx_pending = adapter->rx_desc_count;
595 ring->tx_pending = adapter->tx_desc_count;
596}
597
598/**
599 * iavf_set_ringparam - Set ring parameters
600 * @netdev: network interface device structure
601 * @ring: ethtool ringparam structure
602 *
603 * Sets ring parameters. TX and RX rings are controlled separately, but the
604 * number of rings is not specified, so all rings get the same settings.
605 **/
606static int iavf_set_ringparam(struct net_device *netdev,
607 struct ethtool_ringparam *ring)
608{
609 struct iavf_adapter *adapter = netdev_priv(netdev);
610 u32 new_rx_count, new_tx_count;
611
612 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
613 return -EINVAL;
614
615 new_tx_count = clamp_t(u32, ring->tx_pending,
616 IAVF_MIN_TXD,
617 IAVF_MAX_TXD);
618 new_tx_count = ALIGN(new_tx_count, IAVF_REQ_DESCRIPTOR_MULTIPLE);
619
620 new_rx_count = clamp_t(u32, ring->rx_pending,
621 IAVF_MIN_RXD,
622 IAVF_MAX_RXD);
623 new_rx_count = ALIGN(new_rx_count, IAVF_REQ_DESCRIPTOR_MULTIPLE);
624
625 /* if nothing to do return success */
626 if ((new_tx_count == adapter->tx_desc_count) &&
627 (new_rx_count == adapter->rx_desc_count))
628 return 0;
629
630 adapter->tx_desc_count = new_tx_count;
631 adapter->rx_desc_count = new_rx_count;
632
633 if (netif_running(netdev)) {
634 adapter->flags |= IAVF_FLAG_RESET_NEEDED;
635 queue_work(iavf_wq, &adapter->reset_task);
636 }
637
638 return 0;
639}
640
641/**
642 * __iavf_get_coalesce - get per-queue coalesce settings
643 * @netdev: the netdev to check
644 * @ec: ethtool coalesce data structure
645 * @queue: which queue to pick
646 *
647 * Gets the per-queue settings for coalescence. Specifically Rx and Tx usecs
648 * are per queue. If queue is <0 then we default to queue 0 as the
649 * representative value.
650 **/
651static int __iavf_get_coalesce(struct net_device *netdev,
652 struct ethtool_coalesce *ec, int queue)
653{
654 struct iavf_adapter *adapter = netdev_priv(netdev);
655 struct iavf_vsi *vsi = &adapter->vsi;
656 struct iavf_ring *rx_ring, *tx_ring;
657
658 ec->tx_max_coalesced_frames = vsi->work_limit;
659 ec->rx_max_coalesced_frames = vsi->work_limit;
660
661 /* Rx and Tx usecs per queue value. If user doesn't specify the
662 * queue, return queue 0's value to represent.
663 */
664 if (queue < 0)
665 queue = 0;
666 else if (queue >= adapter->num_active_queues)
667 return -EINVAL;
668
669 rx_ring = &adapter->rx_rings[queue];
670 tx_ring = &adapter->tx_rings[queue];
671
672 if (ITR_IS_DYNAMIC(rx_ring->itr_setting))
673 ec->use_adaptive_rx_coalesce = 1;
674
675 if (ITR_IS_DYNAMIC(tx_ring->itr_setting))
676 ec->use_adaptive_tx_coalesce = 1;
677
678 ec->rx_coalesce_usecs = rx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
679 ec->tx_coalesce_usecs = tx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
680
681 return 0;
682}
683
684/**
685 * iavf_get_coalesce - Get interrupt coalescing settings
686 * @netdev: network interface device structure
687 * @ec: ethtool coalesce structure
688 *
689 * Returns current coalescing settings. This is referred to elsewhere in the
690 * driver as Interrupt Throttle Rate, as this is how the hardware describes
691 * this functionality. Note that if per-queue settings have been modified this
692 * only represents the settings of queue 0.
693 **/
694static int iavf_get_coalesce(struct net_device *netdev,
695 struct ethtool_coalesce *ec)
696{
697 return __iavf_get_coalesce(netdev, ec, -1);
698}
699
700/**
701 * iavf_get_per_queue_coalesce - get coalesce values for specific queue
702 * @netdev: netdev to read
703 * @ec: coalesce settings from ethtool
704 * @queue: the queue to read
705 *
706 * Read specific queue's coalesce settings.
707 **/
708static int iavf_get_per_queue_coalesce(struct net_device *netdev, u32 queue,
709 struct ethtool_coalesce *ec)
710{
711 return __iavf_get_coalesce(netdev, ec, queue);
712}
713
714/**
715 * iavf_set_itr_per_queue - set ITR values for specific queue
716 * @adapter: the VF adapter struct to set values for
717 * @ec: coalesce settings from ethtool
718 * @queue: the queue to modify
719 *
720 * Change the ITR settings for a specific queue.
721 **/
722static void iavf_set_itr_per_queue(struct iavf_adapter *adapter,
723 struct ethtool_coalesce *ec, int queue)
724{
725 struct iavf_ring *rx_ring = &adapter->rx_rings[queue];
726 struct iavf_ring *tx_ring = &adapter->tx_rings[queue];
727 struct iavf_q_vector *q_vector;
728
729 rx_ring->itr_setting = ITR_REG_ALIGN(ec->rx_coalesce_usecs);
730 tx_ring->itr_setting = ITR_REG_ALIGN(ec->tx_coalesce_usecs);
731
732 rx_ring->itr_setting |= IAVF_ITR_DYNAMIC;
733 if (!ec->use_adaptive_rx_coalesce)
734 rx_ring->itr_setting ^= IAVF_ITR_DYNAMIC;
735
736 tx_ring->itr_setting |= IAVF_ITR_DYNAMIC;
737 if (!ec->use_adaptive_tx_coalesce)
738 tx_ring->itr_setting ^= IAVF_ITR_DYNAMIC;
739
740 q_vector = rx_ring->q_vector;
741 q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
742
743 q_vector = tx_ring->q_vector;
744 q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
745
746 /* The interrupt handler itself will take care of programming
747 * the Tx and Rx ITR values based on the values we have entered
748 * into the q_vector, no need to write the values now.
749 */
750}
751
752/**
753 * __iavf_set_coalesce - set coalesce settings for particular queue
754 * @netdev: the netdev to change
755 * @ec: ethtool coalesce settings
756 * @queue: the queue to change
757 *
758 * Sets the coalesce settings for a particular queue.
759 **/
760static int __iavf_set_coalesce(struct net_device *netdev,
761 struct ethtool_coalesce *ec, int queue)
762{
763 struct iavf_adapter *adapter = netdev_priv(netdev);
764 struct iavf_vsi *vsi = &adapter->vsi;
765 int i;
766
767 if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
768 vsi->work_limit = ec->tx_max_coalesced_frames_irq;
769
770 if (ec->rx_coalesce_usecs == 0) {
771 if (ec->use_adaptive_rx_coalesce)
772 netif_info(adapter, drv, netdev, "rx-usecs=0, need to disable adaptive-rx for a complete disable\n");
773 } else if ((ec->rx_coalesce_usecs < IAVF_MIN_ITR) ||
774 (ec->rx_coalesce_usecs > IAVF_MAX_ITR)) {
775 netif_info(adapter, drv, netdev, "Invalid value, rx-usecs range is 0-8160\n");
776 return -EINVAL;
777 } else if (ec->tx_coalesce_usecs == 0) {
778 if (ec->use_adaptive_tx_coalesce)
779 netif_info(adapter, drv, netdev, "tx-usecs=0, need to disable adaptive-tx for a complete disable\n");
780 } else if ((ec->tx_coalesce_usecs < IAVF_MIN_ITR) ||
781 (ec->tx_coalesce_usecs > IAVF_MAX_ITR)) {
782 netif_info(adapter, drv, netdev, "Invalid value, tx-usecs range is 0-8160\n");
783 return -EINVAL;
784 }
785
786 /* Rx and Tx usecs has per queue value. If user doesn't specify the
787 * queue, apply to all queues.
788 */
789 if (queue < 0) {
790 for (i = 0; i < adapter->num_active_queues; i++)
791 iavf_set_itr_per_queue(adapter, ec, i);
792 } else if (queue < adapter->num_active_queues) {
793 iavf_set_itr_per_queue(adapter, ec, queue);
794 } else {
795 netif_info(adapter, drv, netdev, "Invalid queue value, queue range is 0 - %d\n",
796 adapter->num_active_queues - 1);
797 return -EINVAL;
798 }
799
800 return 0;
801}
802
803/**
804 * iavf_set_coalesce - Set interrupt coalescing settings
805 * @netdev: network interface device structure
806 * @ec: ethtool coalesce structure
807 *
808 * Change current coalescing settings for every queue.
809 **/
810static int iavf_set_coalesce(struct net_device *netdev,
811 struct ethtool_coalesce *ec)
812{
813 return __iavf_set_coalesce(netdev, ec, -1);
814}
815
816/**
817 * iavf_set_per_queue_coalesce - set specific queue's coalesce settings
818 * @netdev: the netdev to change
819 * @ec: ethtool's coalesce settings
820 * @queue: the queue to modify
821 *
822 * Modifies a specific queue's coalesce settings.
823 */
824static int iavf_set_per_queue_coalesce(struct net_device *netdev, u32 queue,
825 struct ethtool_coalesce *ec)
826{
827 return __iavf_set_coalesce(netdev, ec, queue);
828}
829
830/**
831 * iavf_get_rxnfc - command to get RX flow classification rules
832 * @netdev: network interface device structure
833 * @cmd: ethtool rxnfc command
834 * @rule_locs: pointer to store rule locations
835 *
836 * Returns Success if the command is supported.
837 **/
838static int iavf_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
839 u32 *rule_locs)
840{
841 struct iavf_adapter *adapter = netdev_priv(netdev);
842 int ret = -EOPNOTSUPP;
843
844 switch (cmd->cmd) {
845 case ETHTOOL_GRXRINGS:
846 cmd->data = adapter->num_active_queues;
847 ret = 0;
848 break;
849 case ETHTOOL_GRXFH:
850 netdev_info(netdev,
851 "RSS hash info is not available to vf, use pf.\n");
852 break;
853 default:
854 break;
855 }
856
857 return ret;
858}
859/**
860 * iavf_get_channels: get the number of channels supported by the device
861 * @netdev: network interface device structure
862 * @ch: channel information structure
863 *
864 * For the purposes of our device, we only use combined channels, i.e. a tx/rx
865 * queue pair. Report one extra channel to match our "other" MSI-X vector.
866 **/
867static void iavf_get_channels(struct net_device *netdev,
868 struct ethtool_channels *ch)
869{
870 struct iavf_adapter *adapter = netdev_priv(netdev);
871
872 /* Report maximum channels */
873 ch->max_combined = adapter->vsi_res->num_queue_pairs;
874
875 ch->max_other = NONQ_VECS;
876 ch->other_count = NONQ_VECS;
877
878 ch->combined_count = adapter->num_active_queues;
879}
880
881/**
882 * iavf_set_channels: set the new channel count
883 * @netdev: network interface device structure
884 * @ch: channel information structure
885 *
886 * Negotiate a new number of channels with the PF then do a reset. During
887 * reset we'll realloc queues and fix the RSS table. Returns 0 on success,
888 * negative on failure.
889 **/
890static int iavf_set_channels(struct net_device *netdev,
891 struct ethtool_channels *ch)
892{
893 struct iavf_adapter *adapter = netdev_priv(netdev);
894 u32 num_req = ch->combined_count;
895
896 if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
897 adapter->num_tc) {
898 dev_info(&adapter->pdev->dev, "Cannot set channels since ADq is enabled.\n");
899 return -EINVAL;
900 }
901
902 /* All of these should have already been checked by ethtool before this
903 * even gets to us, but just to be sure.
904 */
905 if (num_req > adapter->vsi_res->num_queue_pairs)
906 return -EINVAL;
907
908 if (num_req == adapter->num_active_queues)
909 return 0;
910
911 if (ch->rx_count || ch->tx_count || ch->other_count != NONQ_VECS)
912 return -EINVAL;
913
914 adapter->num_req_queues = num_req;
915 adapter->flags |= IAVF_FLAG_REINIT_ITR_NEEDED;
916 iavf_schedule_reset(adapter);
917 return 0;
918}
919
920/**
921 * iavf_get_rxfh_key_size - get the RSS hash key size
922 * @netdev: network interface device structure
923 *
924 * Returns the table size.
925 **/
926static u32 iavf_get_rxfh_key_size(struct net_device *netdev)
927{
928 struct iavf_adapter *adapter = netdev_priv(netdev);
929
930 return adapter->rss_key_size;
931}
932
933/**
934 * iavf_get_rxfh_indir_size - get the rx flow hash indirection table size
935 * @netdev: network interface device structure
936 *
937 * Returns the table size.
938 **/
939static u32 iavf_get_rxfh_indir_size(struct net_device *netdev)
940{
941 struct iavf_adapter *adapter = netdev_priv(netdev);
942
943 return adapter->rss_lut_size;
944}
945
946/**
947 * iavf_get_rxfh - get the rx flow hash indirection table
948 * @netdev: network interface device structure
949 * @indir: indirection table
950 * @key: hash key
951 * @hfunc: hash function in use
952 *
953 * Reads the indirection table directly from the hardware. Always returns 0.
954 **/
955static int iavf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
956 u8 *hfunc)
957{
958 struct iavf_adapter *adapter = netdev_priv(netdev);
959 u16 i;
960
961 if (hfunc)
962 *hfunc = ETH_RSS_HASH_TOP;
963 if (!indir)
964 return 0;
965
966 memcpy(key, adapter->rss_key, adapter->rss_key_size);
967
968 /* Each 32 bits pointed by 'indir' is stored with a lut entry */
969 for (i = 0; i < adapter->rss_lut_size; i++)
970 indir[i] = (u32)adapter->rss_lut[i];
971
972 return 0;
973}
974
975/**
976 * iavf_set_rxfh - set the rx flow hash indirection table
977 * @netdev: network interface device structure
978 * @indir: indirection table
979 * @key: hash key
980 * @hfunc: hash function to use
981 *
982 * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
983 * returns 0 after programming the table.
984 **/
985static int iavf_set_rxfh(struct net_device *netdev, const u32 *indir,
986 const u8 *key, const u8 hfunc)
987{
988 struct iavf_adapter *adapter = netdev_priv(netdev);
989 u16 i;
990
991 /* We do not allow change in unsupported parameters */
992 if (key ||
993 (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
994 return -EOPNOTSUPP;
995 if (!indir)
996 return 0;
997
998 if (key)
999 memcpy(adapter->rss_key, key, adapter->rss_key_size);
1000
1001 /* Each 32 bits pointed by 'indir' is stored with a lut entry */
1002 for (i = 0; i < adapter->rss_lut_size; i++)
1003 adapter->rss_lut[i] = (u8)(indir[i]);
1004
1005 return iavf_config_rss(adapter);
1006}
1007
1008static const struct ethtool_ops iavf_ethtool_ops = {
1009 .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
1010 ETHTOOL_COALESCE_MAX_FRAMES |
1011 ETHTOOL_COALESCE_MAX_FRAMES_IRQ |
1012 ETHTOOL_COALESCE_USE_ADAPTIVE,
1013 .get_drvinfo = iavf_get_drvinfo,
1014 .get_link = ethtool_op_get_link,
1015 .get_ringparam = iavf_get_ringparam,
1016 .set_ringparam = iavf_set_ringparam,
1017 .get_strings = iavf_get_strings,
1018 .get_ethtool_stats = iavf_get_ethtool_stats,
1019 .get_sset_count = iavf_get_sset_count,
1020 .get_priv_flags = iavf_get_priv_flags,
1021 .set_priv_flags = iavf_set_priv_flags,
1022 .get_msglevel = iavf_get_msglevel,
1023 .set_msglevel = iavf_set_msglevel,
1024 .get_coalesce = iavf_get_coalesce,
1025 .set_coalesce = iavf_set_coalesce,
1026 .get_per_queue_coalesce = iavf_get_per_queue_coalesce,
1027 .set_per_queue_coalesce = iavf_set_per_queue_coalesce,
1028 .get_rxnfc = iavf_get_rxnfc,
1029 .get_rxfh_indir_size = iavf_get_rxfh_indir_size,
1030 .get_rxfh = iavf_get_rxfh,
1031 .set_rxfh = iavf_set_rxfh,
1032 .get_channels = iavf_get_channels,
1033 .set_channels = iavf_set_channels,
1034 .get_rxfh_key_size = iavf_get_rxfh_key_size,
1035 .get_link_ksettings = iavf_get_link_ksettings,
1036};
1037
1038/**
1039 * iavf_set_ethtool_ops - Initialize ethtool ops struct
1040 * @netdev: network interface device structure
1041 *
1042 * Sets ethtool ops struct in our netdev so that ethtool can call
1043 * our functions.
1044 **/
1045void iavf_set_ethtool_ops(struct net_device *netdev)
1046{
1047 netdev->ethtool_ops = &iavf_ethtool_ops;
1048}