1 /*******************************************************************************
2 *
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2015 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
20 *
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 ******************************************************************************/
26
27 /* ethtool support for i40evf */
28 #include "i40evf.h"
29
30 #include <linux/uaccess.h>
31
32 struct i40evf_stats {
33 char stat_string[ETH_GSTRING_LEN];
34 int stat_offset;
35 };
36
37 #define I40EVF_STAT(_name, _stat) { \
38 .stat_string = _name, \
39 .stat_offset = offsetof(struct i40evf_adapter, _stat) \
40 }
41
42 /* All stats are u64, so we don't need to track the size of the field. */
43 static const struct i40evf_stats i40evf_gstrings_stats[] = {
44 I40EVF_STAT("rx_bytes", current_stats.rx_bytes),
45 I40EVF_STAT("rx_unicast", current_stats.rx_unicast),
46 I40EVF_STAT("rx_multicast", current_stats.rx_multicast),
47 I40EVF_STAT("rx_broadcast", current_stats.rx_broadcast),
48 I40EVF_STAT("rx_discards", current_stats.rx_discards),
49 I40EVF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
50 I40EVF_STAT("tx_bytes", current_stats.tx_bytes),
51 I40EVF_STAT("tx_unicast", current_stats.tx_unicast),
52 I40EVF_STAT("tx_multicast", current_stats.tx_multicast),
53 I40EVF_STAT("tx_broadcast", current_stats.tx_broadcast),
54 I40EVF_STAT("tx_discards", current_stats.tx_discards),
55 I40EVF_STAT("tx_errors", current_stats.tx_errors),
56 };
57
58 #define I40EVF_GLOBAL_STATS_LEN ARRAY_SIZE(i40evf_gstrings_stats)
59 #define I40EVF_QUEUE_STATS_LEN(_dev) \
60 (((struct i40evf_adapter *)\
61 netdev_priv(_dev))->num_active_queues \
62 * 2 * (sizeof(struct i40e_queue_stats) / sizeof(u64)))
63 #define I40EVF_STATS_LEN(_dev) \
64 (I40EVF_GLOBAL_STATS_LEN + I40EVF_QUEUE_STATS_LEN(_dev))
65
66 /**
67 * i40evf_get_settings - Get Link Speed and Duplex settings
68 * @netdev: network interface device structure
69 * @ecmd: 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_settings(struct net_device * netdev,struct ethtool_cmd * ecmd)74 static int i40evf_get_settings(struct net_device *netdev,
75 struct ethtool_cmd *ecmd)
76 {
77 /* In the future the VF will be able to query the PF for
78 * some information - for now use a dummy value
79 */
80 ecmd->supported = 0;
81 ecmd->autoneg = AUTONEG_DISABLE;
82 ecmd->transceiver = XCVR_DUMMY1;
83 ecmd->port = PORT_NONE;
84
85 return 0;
86 }
87
88 /**
89 * i40evf_get_sset_count - Get length of string set
90 * @netdev: network interface device structure
91 * @sset: id of string set
92 *
93 * Reports size of string table. This driver only supports
94 * strings for statistics.
95 **/
i40evf_get_sset_count(struct net_device * netdev,int sset)96 static int i40evf_get_sset_count(struct net_device *netdev, int sset)
97 {
98 if (sset == ETH_SS_STATS)
99 return I40EVF_STATS_LEN(netdev);
100 else
101 return -EINVAL;
102 }
103
104 /**
105 * i40evf_get_ethtool_stats - report device statistics
106 * @netdev: network interface device structure
107 * @stats: ethtool statistics structure
108 * @data: pointer to data buffer
109 *
110 * All statistics are added to the data buffer as an array of u64.
111 **/
i40evf_get_ethtool_stats(struct net_device * netdev,struct ethtool_stats * stats,u64 * data)112 static void i40evf_get_ethtool_stats(struct net_device *netdev,
113 struct ethtool_stats *stats, u64 *data)
114 {
115 struct i40evf_adapter *adapter = netdev_priv(netdev);
116 int i, j;
117 char *p;
118
119 for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
120 p = (char *)adapter + i40evf_gstrings_stats[i].stat_offset;
121 data[i] = *(u64 *)p;
122 }
123 for (j = 0; j < adapter->num_active_queues; j++) {
124 data[i++] = adapter->tx_rings[j]->stats.packets;
125 data[i++] = adapter->tx_rings[j]->stats.bytes;
126 }
127 for (j = 0; j < adapter->num_active_queues; j++) {
128 data[i++] = adapter->rx_rings[j]->stats.packets;
129 data[i++] = adapter->rx_rings[j]->stats.bytes;
130 }
131 }
132
133 /**
134 * i40evf_get_strings - Get string set
135 * @netdev: network interface device structure
136 * @sset: id of string set
137 * @data: buffer for string data
138 *
139 * Builds stats string table.
140 **/
i40evf_get_strings(struct net_device * netdev,u32 sset,u8 * data)141 static void i40evf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
142 {
143 struct i40evf_adapter *adapter = netdev_priv(netdev);
144 u8 *p = data;
145 int i;
146
147 if (sset == ETH_SS_STATS) {
148 for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
149 memcpy(p, i40evf_gstrings_stats[i].stat_string,
150 ETH_GSTRING_LEN);
151 p += ETH_GSTRING_LEN;
152 }
153 for (i = 0; i < adapter->num_active_queues; i++) {
154 snprintf(p, ETH_GSTRING_LEN, "tx-%u.packets", i);
155 p += ETH_GSTRING_LEN;
156 snprintf(p, ETH_GSTRING_LEN, "tx-%u.bytes", i);
157 p += ETH_GSTRING_LEN;
158 }
159 for (i = 0; i < adapter->num_active_queues; i++) {
160 snprintf(p, ETH_GSTRING_LEN, "rx-%u.packets", i);
161 p += ETH_GSTRING_LEN;
162 snprintf(p, ETH_GSTRING_LEN, "rx-%u.bytes", i);
163 p += ETH_GSTRING_LEN;
164 }
165 }
166 }
167
168 /**
169 * i40evf_get_msglevel - Get debug message level
170 * @netdev: network interface device structure
171 *
172 * Returns current debug message level.
173 **/
i40evf_get_msglevel(struct net_device * netdev)174 static u32 i40evf_get_msglevel(struct net_device *netdev)
175 {
176 struct i40evf_adapter *adapter = netdev_priv(netdev);
177
178 return adapter->msg_enable;
179 }
180
181 /**
182 * i40evf_set_msglevel - Set debug message level
183 * @netdev: network interface device structure
184 * @data: message level
185 *
186 * Set current debug message level. Higher values cause the driver to
187 * be noisier.
188 **/
i40evf_set_msglevel(struct net_device * netdev,u32 data)189 static void i40evf_set_msglevel(struct net_device *netdev, u32 data)
190 {
191 struct i40evf_adapter *adapter = netdev_priv(netdev);
192
193 if (I40E_DEBUG_USER & data)
194 adapter->hw.debug_mask = data;
195 adapter->msg_enable = data;
196 }
197
198 /**
199 * i40evf_get_drvinfo - Get driver info
200 * @netdev: network interface device structure
201 * @drvinfo: ethool driver info structure
202 *
203 * Returns information about the driver and device for display to the user.
204 **/
i40evf_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * drvinfo)205 static void i40evf_get_drvinfo(struct net_device *netdev,
206 struct ethtool_drvinfo *drvinfo)
207 {
208 struct i40evf_adapter *adapter = netdev_priv(netdev);
209
210 strlcpy(drvinfo->driver, i40evf_driver_name, 32);
211 strlcpy(drvinfo->version, i40evf_driver_version, 32);
212 strlcpy(drvinfo->fw_version, "N/A", 4);
213 strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
214 }
215
216 /**
217 * i40evf_get_ringparam - Get ring parameters
218 * @netdev: network interface device structure
219 * @ring: ethtool ringparam structure
220 *
221 * Returns current ring parameters. TX and RX rings are reported separately,
222 * but the number of rings is not reported.
223 **/
i40evf_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)224 static void i40evf_get_ringparam(struct net_device *netdev,
225 struct ethtool_ringparam *ring)
226 {
227 struct i40evf_adapter *adapter = netdev_priv(netdev);
228
229 ring->rx_max_pending = I40EVF_MAX_RXD;
230 ring->tx_max_pending = I40EVF_MAX_TXD;
231 ring->rx_pending = adapter->rx_desc_count;
232 ring->tx_pending = adapter->tx_desc_count;
233 }
234
235 /**
236 * i40evf_set_ringparam - Set ring parameters
237 * @netdev: network interface device structure
238 * @ring: ethtool ringparam structure
239 *
240 * Sets ring parameters. TX and RX rings are controlled separately, but the
241 * number of rings is not specified, so all rings get the same settings.
242 **/
i40evf_set_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)243 static int i40evf_set_ringparam(struct net_device *netdev,
244 struct ethtool_ringparam *ring)
245 {
246 struct i40evf_adapter *adapter = netdev_priv(netdev);
247 u32 new_rx_count, new_tx_count;
248
249 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
250 return -EINVAL;
251
252 new_tx_count = clamp_t(u32, ring->tx_pending,
253 I40EVF_MIN_TXD,
254 I40EVF_MAX_TXD);
255 new_tx_count = ALIGN(new_tx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
256
257 new_rx_count = clamp_t(u32, ring->rx_pending,
258 I40EVF_MIN_RXD,
259 I40EVF_MAX_RXD);
260 new_rx_count = ALIGN(new_rx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
261
262 /* if nothing to do return success */
263 if ((new_tx_count == adapter->tx_desc_count) &&
264 (new_rx_count == adapter->rx_desc_count))
265 return 0;
266
267 adapter->tx_desc_count = new_tx_count;
268 adapter->rx_desc_count = new_rx_count;
269
270 if (netif_running(netdev)) {
271 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
272 schedule_work(&adapter->reset_task);
273 }
274
275 return 0;
276 }
277
278 /**
279 * i40evf_get_coalesce - Get interrupt coalescing settings
280 * @netdev: network interface device structure
281 * @ec: ethtool coalesce structure
282 *
283 * Returns current coalescing settings. This is referred to elsewhere in the
284 * driver as Interrupt Throttle Rate, as this is how the hardware describes
285 * this functionality.
286 **/
i40evf_get_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec)287 static int i40evf_get_coalesce(struct net_device *netdev,
288 struct ethtool_coalesce *ec)
289 {
290 struct i40evf_adapter *adapter = netdev_priv(netdev);
291 struct i40e_vsi *vsi = &adapter->vsi;
292
293 ec->tx_max_coalesced_frames = vsi->work_limit;
294 ec->rx_max_coalesced_frames = vsi->work_limit;
295
296 if (ITR_IS_DYNAMIC(vsi->rx_itr_setting))
297 ec->use_adaptive_rx_coalesce = 1;
298
299 if (ITR_IS_DYNAMIC(vsi->tx_itr_setting))
300 ec->use_adaptive_tx_coalesce = 1;
301
302 ec->rx_coalesce_usecs = vsi->rx_itr_setting & ~I40E_ITR_DYNAMIC;
303 ec->tx_coalesce_usecs = vsi->tx_itr_setting & ~I40E_ITR_DYNAMIC;
304
305 return 0;
306 }
307
308 /**
309 * i40evf_set_coalesce - Set interrupt coalescing settings
310 * @netdev: network interface device structure
311 * @ec: ethtool coalesce structure
312 *
313 * Change current coalescing settings.
314 **/
i40evf_set_coalesce(struct net_device * netdev,struct ethtool_coalesce * ec)315 static int i40evf_set_coalesce(struct net_device *netdev,
316 struct ethtool_coalesce *ec)
317 {
318 struct i40evf_adapter *adapter = netdev_priv(netdev);
319 struct i40e_hw *hw = &adapter->hw;
320 struct i40e_vsi *vsi = &adapter->vsi;
321 struct i40e_q_vector *q_vector;
322 int i;
323
324 if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
325 vsi->work_limit = ec->tx_max_coalesced_frames_irq;
326
327 if ((ec->rx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
328 (ec->rx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
329 vsi->rx_itr_setting = ec->rx_coalesce_usecs;
330
331 else
332 return -EINVAL;
333
334 if ((ec->tx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
335 (ec->tx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
336 vsi->tx_itr_setting = ec->tx_coalesce_usecs;
337 else if (ec->use_adaptive_tx_coalesce)
338 vsi->tx_itr_setting = (I40E_ITR_DYNAMIC |
339 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
340 else
341 return -EINVAL;
342
343 if (ec->use_adaptive_rx_coalesce)
344 vsi->rx_itr_setting |= I40E_ITR_DYNAMIC;
345 else
346 vsi->rx_itr_setting &= ~I40E_ITR_DYNAMIC;
347
348 if (ec->use_adaptive_tx_coalesce)
349 vsi->tx_itr_setting |= I40E_ITR_DYNAMIC;
350 else
351 vsi->tx_itr_setting &= ~I40E_ITR_DYNAMIC;
352
353 for (i = 0; i < adapter->num_msix_vectors - NONQ_VECS; i++) {
354 q_vector = adapter->q_vector[i];
355 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
356 wr32(hw, I40E_VFINT_ITRN1(0, i), q_vector->rx.itr);
357 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
358 wr32(hw, I40E_VFINT_ITRN1(1, i), q_vector->tx.itr);
359 i40e_flush(hw);
360 }
361
362 return 0;
363 }
364
365 /**
366 * i40e_get_rss_hash_opts - Get RSS hash Input Set for each flow type
367 * @adapter: board private structure
368 * @cmd: ethtool rxnfc command
369 *
370 * Returns Success if the flow is supported, else Invalid Input.
371 **/
i40evf_get_rss_hash_opts(struct i40evf_adapter * adapter,struct ethtool_rxnfc * cmd)372 static int i40evf_get_rss_hash_opts(struct i40evf_adapter *adapter,
373 struct ethtool_rxnfc *cmd)
374 {
375 struct i40e_hw *hw = &adapter->hw;
376 u64 hena = (u64)rd32(hw, I40E_VFQF_HENA(0)) |
377 ((u64)rd32(hw, I40E_VFQF_HENA(1)) << 32);
378
379 /* We always hash on IP src and dest addresses */
380 cmd->data = RXH_IP_SRC | RXH_IP_DST;
381
382 switch (cmd->flow_type) {
383 case TCP_V4_FLOW:
384 if (hena & BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP))
385 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
386 break;
387 case UDP_V4_FLOW:
388 if (hena & BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_UDP))
389 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
390 break;
391
392 case SCTP_V4_FLOW:
393 case AH_ESP_V4_FLOW:
394 case AH_V4_FLOW:
395 case ESP_V4_FLOW:
396 case IPV4_FLOW:
397 break;
398
399 case TCP_V6_FLOW:
400 if (hena & BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP))
401 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
402 break;
403 case UDP_V6_FLOW:
404 if (hena & BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_UDP))
405 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
406 break;
407
408 case SCTP_V6_FLOW:
409 case AH_ESP_V6_FLOW:
410 case AH_V6_FLOW:
411 case ESP_V6_FLOW:
412 case IPV6_FLOW:
413 break;
414 default:
415 cmd->data = 0;
416 return -EINVAL;
417 }
418
419 return 0;
420 }
421
422 /**
423 * i40evf_get_rxnfc - command to get RX flow classification rules
424 * @netdev: network interface device structure
425 * @cmd: ethtool rxnfc command
426 *
427 * Returns Success if the command is supported.
428 **/
i40evf_get_rxnfc(struct net_device * netdev,struct ethtool_rxnfc * cmd,u32 * rule_locs)429 static int i40evf_get_rxnfc(struct net_device *netdev,
430 struct ethtool_rxnfc *cmd,
431 u32 *rule_locs)
432 {
433 struct i40evf_adapter *adapter = netdev_priv(netdev);
434 int ret = -EOPNOTSUPP;
435
436 switch (cmd->cmd) {
437 case ETHTOOL_GRXRINGS:
438 cmd->data = adapter->num_active_queues;
439 ret = 0;
440 break;
441 case ETHTOOL_GRXFH:
442 ret = i40evf_get_rss_hash_opts(adapter, cmd);
443 break;
444 default:
445 break;
446 }
447
448 return ret;
449 }
450
451 /**
452 * i40evf_set_rss_hash_opt - Enable/Disable flow types for RSS hash
453 * @adapter: board private structure
454 * @cmd: ethtool rxnfc command
455 *
456 * Returns Success if the flow input set is supported.
457 **/
i40evf_set_rss_hash_opt(struct i40evf_adapter * adapter,struct ethtool_rxnfc * nfc)458 static int i40evf_set_rss_hash_opt(struct i40evf_adapter *adapter,
459 struct ethtool_rxnfc *nfc)
460 {
461 struct i40e_hw *hw = &adapter->hw;
462
463 u64 hena = (u64)rd32(hw, I40E_VFQF_HENA(0)) |
464 ((u64)rd32(hw, I40E_VFQF_HENA(1)) << 32);
465
466 /* RSS does not support anything other than hashing
467 * to queues on src and dst IPs and ports
468 */
469 if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
470 RXH_L4_B_0_1 | RXH_L4_B_2_3))
471 return -EINVAL;
472
473 /* We need at least the IP SRC and DEST fields for hashing */
474 if (!(nfc->data & RXH_IP_SRC) ||
475 !(nfc->data & RXH_IP_DST))
476 return -EINVAL;
477
478 switch (nfc->flow_type) {
479 case TCP_V4_FLOW:
480 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
481 case 0:
482 hena &= ~BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP);
483 break;
484 case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
485 hena |= BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP);
486 break;
487 default:
488 return -EINVAL;
489 }
490 break;
491 case TCP_V6_FLOW:
492 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
493 case 0:
494 hena &= ~BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP);
495 break;
496 case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
497 hena |= BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP);
498 break;
499 default:
500 return -EINVAL;
501 }
502 break;
503 case UDP_V4_FLOW:
504 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
505 case 0:
506 hena &= ~(BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_UDP) |
507 BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV4));
508 break;
509 case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
510 hena |= (BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_UDP) |
511 BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV4));
512 break;
513 default:
514 return -EINVAL;
515 }
516 break;
517 case UDP_V6_FLOW:
518 switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
519 case 0:
520 hena &= ~(BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_UDP) |
521 BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV6));
522 break;
523 case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
524 hena |= (BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_UDP) |
525 BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV6));
526 break;
527 default:
528 return -EINVAL;
529 }
530 break;
531 case AH_ESP_V4_FLOW:
532 case AH_V4_FLOW:
533 case ESP_V4_FLOW:
534 case SCTP_V4_FLOW:
535 if ((nfc->data & RXH_L4_B_0_1) ||
536 (nfc->data & RXH_L4_B_2_3))
537 return -EINVAL;
538 hena |= BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_OTHER);
539 break;
540 case AH_ESP_V6_FLOW:
541 case AH_V6_FLOW:
542 case ESP_V6_FLOW:
543 case SCTP_V6_FLOW:
544 if ((nfc->data & RXH_L4_B_0_1) ||
545 (nfc->data & RXH_L4_B_2_3))
546 return -EINVAL;
547 hena |= BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_OTHER);
548 break;
549 case IPV4_FLOW:
550 hena |= (BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_OTHER) |
551 BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV4));
552 break;
553 case IPV6_FLOW:
554 hena |= (BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_OTHER) |
555 BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV6));
556 break;
557 default:
558 return -EINVAL;
559 }
560
561 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
562 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
563 i40e_flush(hw);
564
565 return 0;
566 }
567
568 /**
569 * i40evf_set_rxnfc - command to set RX flow classification rules
570 * @netdev: network interface device structure
571 * @cmd: ethtool rxnfc command
572 *
573 * Returns Success if the command is supported.
574 **/
i40evf_set_rxnfc(struct net_device * netdev,struct ethtool_rxnfc * cmd)575 static int i40evf_set_rxnfc(struct net_device *netdev,
576 struct ethtool_rxnfc *cmd)
577 {
578 struct i40evf_adapter *adapter = netdev_priv(netdev);
579 int ret = -EOPNOTSUPP;
580
581 switch (cmd->cmd) {
582 case ETHTOOL_SRXFH:
583 ret = i40evf_set_rss_hash_opt(adapter, cmd);
584 break;
585 default:
586 break;
587 }
588
589 return ret;
590 }
591
592 /**
593 * i40evf_get_channels: get the number of channels supported by the device
594 * @netdev: network interface device structure
595 * @ch: channel information structure
596 *
597 * For the purposes of our device, we only use combined channels, i.e. a tx/rx
598 * queue pair. Report one extra channel to match our "other" MSI-X vector.
599 **/
i40evf_get_channels(struct net_device * netdev,struct ethtool_channels * ch)600 static void i40evf_get_channels(struct net_device *netdev,
601 struct ethtool_channels *ch)
602 {
603 struct i40evf_adapter *adapter = netdev_priv(netdev);
604
605 /* Report maximum channels */
606 ch->max_combined = adapter->num_active_queues;
607
608 ch->max_other = NONQ_VECS;
609 ch->other_count = NONQ_VECS;
610
611 ch->combined_count = adapter->num_active_queues;
612 }
613
614 /**
615 * i40evf_get_rxfh_indir_size - get the rx flow hash indirection table size
616 * @netdev: network interface device structure
617 *
618 * Returns the table size.
619 **/
i40evf_get_rxfh_indir_size(struct net_device * netdev)620 static u32 i40evf_get_rxfh_indir_size(struct net_device *netdev)
621 {
622 return (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4;
623 }
624
625 /**
626 * i40evf_get_rxfh - get the rx flow hash indirection table
627 * @netdev: network interface device structure
628 * @indir: indirection table
629 * @key: hash key
630 *
631 * Reads the indirection table directly from the hardware. Always returns 0.
632 **/
i40evf_get_rxfh(struct net_device * netdev,u32 * indir,u8 * key,u8 * hfunc)633 static int i40evf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
634 u8 *hfunc)
635 {
636 struct i40evf_adapter *adapter = netdev_priv(netdev);
637 struct i40e_hw *hw = &adapter->hw;
638 u32 hlut_val;
639 int i, j;
640
641 if (hfunc)
642 *hfunc = ETH_RSS_HASH_TOP;
643 if (!indir)
644 return 0;
645
646 if (indir) {
647 for (i = 0, j = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
648 hlut_val = rd32(hw, I40E_VFQF_HLUT(i));
649 indir[j++] = hlut_val & 0xff;
650 indir[j++] = (hlut_val >> 8) & 0xff;
651 indir[j++] = (hlut_val >> 16) & 0xff;
652 indir[j++] = (hlut_val >> 24) & 0xff;
653 }
654 }
655 return 0;
656 }
657
658 /**
659 * i40evf_set_rxfh - set the rx flow hash indirection table
660 * @netdev: network interface device structure
661 * @indir: indirection table
662 * @key: hash key
663 *
664 * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
665 * returns 0 after programming the table.
666 **/
i40evf_set_rxfh(struct net_device * netdev,const u32 * indir,const u8 * key,const u8 hfunc)667 static int i40evf_set_rxfh(struct net_device *netdev, const u32 *indir,
668 const u8 *key, const u8 hfunc)
669 {
670 struct i40evf_adapter *adapter = netdev_priv(netdev);
671 struct i40e_hw *hw = &adapter->hw;
672 u32 hlut_val;
673 int i, j;
674
675 /* We do not allow change in unsupported parameters */
676 if (key ||
677 (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
678 return -EOPNOTSUPP;
679 if (!indir)
680 return 0;
681
682 for (i = 0, j = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
683 hlut_val = indir[j++];
684 hlut_val |= indir[j++] << 8;
685 hlut_val |= indir[j++] << 16;
686 hlut_val |= indir[j++] << 24;
687 wr32(hw, I40E_VFQF_HLUT(i), hlut_val);
688 }
689
690 return 0;
691 }
692
693 static const struct ethtool_ops i40evf_ethtool_ops = {
694 .get_settings = i40evf_get_settings,
695 .get_drvinfo = i40evf_get_drvinfo,
696 .get_link = ethtool_op_get_link,
697 .get_ringparam = i40evf_get_ringparam,
698 .set_ringparam = i40evf_set_ringparam,
699 .get_strings = i40evf_get_strings,
700 .get_ethtool_stats = i40evf_get_ethtool_stats,
701 .get_sset_count = i40evf_get_sset_count,
702 .get_msglevel = i40evf_get_msglevel,
703 .set_msglevel = i40evf_set_msglevel,
704 .get_coalesce = i40evf_get_coalesce,
705 .set_coalesce = i40evf_set_coalesce,
706 .get_rxnfc = i40evf_get_rxnfc,
707 .set_rxnfc = i40evf_set_rxnfc,
708 .get_rxfh_indir_size = i40evf_get_rxfh_indir_size,
709 .get_rxfh = i40evf_get_rxfh,
710 .set_rxfh = i40evf_set_rxfh,
711 .get_channels = i40evf_get_channels,
712 };
713
714 /**
715 * i40evf_set_ethtool_ops - Initialize ethtool ops struct
716 * @netdev: network interface device structure
717 *
718 * Sets ethtool ops struct in our netdev so that ethtool can call
719 * our functions.
720 **/
i40evf_set_ethtool_ops(struct net_device * netdev)721 void i40evf_set_ethtool_ops(struct net_device *netdev)
722 {
723 netdev->ethtool_ops = &i40evf_ethtool_ops;
724 }
725