summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
blob: 7d7933d00b8f15107868dea795de73a6f61d0a07 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
/*
 * Copyright (C) 2015 Netronome Systems, Inc.
 *
 * This software is dual licensed under the GNU General License Version 2,
 * June 1991 as shown in the file COPYING in the top-level directory of this
 * source tree or the BSD 2-Clause License provided below.  You have the
 * option to license this software under the complete terms of either license.
 *
 * The BSD 2-Clause License:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      1. Redistributions of source code must retain the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer.
 *
 *      2. Redistributions in binary form must reproduce the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer in the documentation and/or other materials
 *         provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/*
 * nfp_net_ethtool.c
 * Netronome network device driver: ethtool support
 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
 *          Jason McMullan <jason.mcmullan@netronome.com>
 *          Rolf Neugebauer <rolf.neugebauer@netronome.com>
 *          Brad Petrus <brad.petrus@netronome.com>
 */

#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/ethtool.h>

#include "nfp_net_ctrl.h"
#include "nfp_net.h"

/* Support for stats. Returns netdev, driver, and device stats */
enum { NETDEV_ET_STATS, NFP_NET_DRV_ET_STATS, NFP_NET_DEV_ET_STATS };
struct _nfp_net_et_stats {
	char name[ETH_GSTRING_LEN];
	int type;
	int sz;
	int off;
};

#define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS,			\
		FIELD_SIZEOF(struct net_device_stats, m),	\
		offsetof(struct net_device_stats, m)
/* For stats in the control BAR (other than Q stats) */
#define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS,			\
		sizeof(u64),					\
		(m)
static const struct _nfp_net_et_stats nfp_net_et_stats[] = {
	/* netdev stats */
	{"rx_packets", NN_ET_NETDEV_STAT(rx_packets)},
	{"tx_packets", NN_ET_NETDEV_STAT(tx_packets)},
	{"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes)},
	{"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes)},
	{"rx_errors", NN_ET_NETDEV_STAT(rx_errors)},
	{"tx_errors", NN_ET_NETDEV_STAT(tx_errors)},
	{"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped)},
	{"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped)},
	{"multicast", NN_ET_NETDEV_STAT(multicast)},
	{"collisions", NN_ET_NETDEV_STAT(collisions)},
	{"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors)},
	{"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors)},
	{"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors)},
	{"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors)},
	{"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors)},
	{"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors)},
	{"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors)},
	{"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors)},
	/* Stats from the device */
	{"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS)},
	{"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS)},
	{"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS)},
	{"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS)},
	{"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS)},
	{"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS)},
	{"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES)},
	{"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES)},
	{"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES)},

	{"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS)},
	{"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS)},
	{"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS)},
	{"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS)},
	{"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS)},
	{"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS)},
	{"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES)},
	{"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES)},
	{"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES)},
};

#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats)
#define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3)
#define NN_ET_RVEC_GATHER_STATS 7
#define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2)
#define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \
			 NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN)

static void nfp_net_get_drvinfo(struct net_device *netdev,
				struct ethtool_drvinfo *drvinfo)
{
	struct nfp_net *nn = netdev_priv(netdev);

	strlcpy(drvinfo->driver, nfp_net_driver_name, sizeof(drvinfo->driver));
	strlcpy(drvinfo->version, nfp_net_driver_version,
		sizeof(drvinfo->version));

	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
		 "%d.%d.%d.%d",
		 nn->fw_ver.resv, nn->fw_ver.class,
		 nn->fw_ver.major, nn->fw_ver.minor);
	strlcpy(drvinfo->bus_info, pci_name(nn->pdev),
		sizeof(drvinfo->bus_info));

	drvinfo->n_stats = NN_ET_STATS_LEN;
	drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ;
}

static void nfp_net_get_ringparam(struct net_device *netdev,
				  struct ethtool_ringparam *ring)
{
	struct nfp_net *nn = netdev_priv(netdev);

	ring->rx_max_pending = NFP_NET_MAX_RX_DESCS;
	ring->tx_max_pending = NFP_NET_MAX_TX_DESCS;
	ring->rx_pending = nn->rxd_cnt;
	ring->tx_pending = nn->txd_cnt;
}

static int nfp_net_set_ringparam(struct net_device *netdev,
				 struct ethtool_ringparam *ring)
{
	struct nfp_net *nn = netdev_priv(netdev);
	u32 rxd_cnt, txd_cnt;

	/* We don't have separate queues/rings for small/large frames. */
	if (ring->rx_mini_pending || ring->rx_jumbo_pending)
		return -EINVAL;

	/* Round up to supported values */
	rxd_cnt = roundup_pow_of_two(ring->rx_pending);
	txd_cnt = roundup_pow_of_two(ring->tx_pending);

	if (rxd_cnt < NFP_NET_MIN_RX_DESCS || rxd_cnt > NFP_NET_MAX_RX_DESCS ||
	    txd_cnt < NFP_NET_MIN_TX_DESCS || txd_cnt > NFP_NET_MAX_TX_DESCS)
		return -EINVAL;

	if (nn->rxd_cnt == rxd_cnt && nn->txd_cnt == txd_cnt)
		return 0;

	nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n",
	       nn->rxd_cnt, rxd_cnt, nn->txd_cnt, txd_cnt);

	return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt);
}

static void nfp_net_get_strings(struct net_device *netdev,
				u32 stringset, u8 *data)
{
	struct nfp_net *nn = netdev_priv(netdev);
	u8 *p = data;
	int i;

	switch (stringset) {
	case ETH_SS_STATS:
		for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) {
			memcpy(p, nfp_net_et_stats[i].name, ETH_GSTRING_LEN);
			p += ETH_GSTRING_LEN;
		}
		for (i = 0; i < nn->num_r_vecs; i++) {
			sprintf(p, "rvec_%u_rx_pkts", i);
			p += ETH_GSTRING_LEN;
			sprintf(p, "rvec_%u_tx_pkts", i);
			p += ETH_GSTRING_LEN;
			sprintf(p, "rvec_%u_tx_busy", i);
			p += ETH_GSTRING_LEN;
		}
		strncpy(p, "hw_rx_csum_ok", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		strncpy(p, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		strncpy(p, "hw_rx_csum_err", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		strncpy(p, "hw_tx_csum", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		strncpy(p, "hw_tx_inner_csum", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		strncpy(p, "tx_gather", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		strncpy(p, "tx_lso", ETH_GSTRING_LEN);
		p += ETH_GSTRING_LEN;
		for (i = 0; i < nn->num_tx_rings; i++) {
			sprintf(p, "txq_%u_pkts", i);
			p += ETH_GSTRING_LEN;
			sprintf(p, "txq_%u_bytes", i);
			p += ETH_GSTRING_LEN;
		}
		for (i = 0; i < nn->num_rx_rings; i++) {
			sprintf(p, "rxq_%u_pkts", i);
			p += ETH_GSTRING_LEN;
			sprintf(p, "rxq_%u_bytes", i);
			p += ETH_GSTRING_LEN;
		}
		break;
	}
}

static void nfp_net_get_stats(struct net_device *netdev,
			      struct ethtool_stats *stats, u64 *data)
{
	u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {};
	struct nfp_net *nn = netdev_priv(netdev);
	struct rtnl_link_stats64 *netdev_stats;
	struct rtnl_link_stats64 temp = {};
	u64 tmp[NN_ET_RVEC_GATHER_STATS];
	u8 __iomem *io_p;
	int i, j, k;
	u8 *p;

	netdev_stats = dev_get_stats(netdev, &temp);

	for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++) {
		switch (nfp_net_et_stats[i].type) {
		case NETDEV_ET_STATS:
			p = (char *)netdev_stats + nfp_net_et_stats[i].off;
			data[i] = nfp_net_et_stats[i].sz == sizeof(u64) ?
				*(u64 *)p : *(u32 *)p;
			break;

		case NFP_NET_DEV_ET_STATS:
			io_p = nn->ctrl_bar + nfp_net_et_stats[i].off;
			data[i] = readq(io_p);
			break;
		}
	}
	for (j = 0; j < nn->num_r_vecs; j++) {
		unsigned int start;

		do {
			start = u64_stats_fetch_begin(&nn->r_vecs[j].rx_sync);
			data[i++] = nn->r_vecs[j].rx_pkts;
			tmp[0] = nn->r_vecs[j].hw_csum_rx_ok;
			tmp[1] = nn->r_vecs[j].hw_csum_rx_inner_ok;
			tmp[2] = nn->r_vecs[j].hw_csum_rx_error;
		} while (u64_stats_fetch_retry(&nn->r_vecs[j].rx_sync, start));

		do {
			start = u64_stats_fetch_begin(&nn->r_vecs[j].tx_sync);
			data[i++] = nn->r_vecs[j].tx_pkts;
			data[i++] = nn->r_vecs[j].tx_busy;
			tmp[3] = nn->r_vecs[j].hw_csum_tx;
			tmp[4] = nn->r_vecs[j].hw_csum_tx_inner;
			tmp[5] = nn->r_vecs[j].tx_gather;
			tmp[6] = nn->r_vecs[j].tx_lso;
		} while (u64_stats_fetch_retry(&nn->r_vecs[j].tx_sync, start));

		for (k = 0; k < NN_ET_RVEC_GATHER_STATS; k++)
			gathered_stats[k] += tmp[k];
	}
	for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++)
		data[i++] = gathered_stats[j];
	for (j = 0; j < nn->num_tx_rings; j++) {
		io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j);
		data[i++] = readq(io_p);
		io_p = nn->ctrl_bar + NFP_NET_CFG_TXR_STATS(j) + 8;
		data[i++] = readq(io_p);
	}
	for (j = 0; j < nn->num_rx_rings; j++) {
		io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j);
		data[i++] = readq(io_p);
		io_p = nn->ctrl_bar + NFP_NET_CFG_RXR_STATS(j) + 8;
		data[i++] = readq(io_p);
	}
}

static int nfp_net_get_sset_count(struct net_device *netdev, int sset)
{
	struct nfp_net *nn = netdev_priv(netdev);

	switch (sset) {
	case ETH_SS_STATS:
		return NN_ET_STATS_LEN;
	default:
		return -EOPNOTSUPP;
	}
}

/* RX network flow classification (RSS, filters, etc)
 */
static u32 ethtool_flow_to_nfp_flag(u32 flow_type)
{
	static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = {
		[TCP_V4_FLOW]	= NFP_NET_CFG_RSS_IPV4_TCP,
		[TCP_V6_FLOW]	= NFP_NET_CFG_RSS_IPV6_TCP,
		[UDP_V4_FLOW]	= NFP_NET_CFG_RSS_IPV4_UDP,
		[UDP_V6_FLOW]	= NFP_NET_CFG_RSS_IPV6_UDP,
		[IPV4_FLOW]	= NFP_NET_CFG_RSS_IPV4,
		[IPV6_FLOW]	= NFP_NET_CFG_RSS_IPV6,
	};

	if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp))
		return 0;

	return xlate_ethtool_to_nfp[flow_type];
}

static int nfp_net_get_rss_hash_opts(struct nfp_net *nn,
				     struct ethtool_rxnfc *cmd)
{
	u32 nfp_rss_flag;

	cmd->data = 0;

	if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
		return -EOPNOTSUPP;

	nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type);
	if (!nfp_rss_flag)
		return -EINVAL;

	cmd->data |= RXH_IP_SRC | RXH_IP_DST;
	if (nn->rss_cfg & nfp_rss_flag)
		cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;

	return 0;
}

static int nfp_net_get_rxnfc(struct net_device *netdev,
			     struct ethtool_rxnfc *cmd, u32 *rule_locs)
{
	struct nfp_net *nn = netdev_priv(netdev);

	switch (cmd->cmd) {
	case ETHTOOL_GRXRINGS:
		cmd->data = nn->num_rx_rings;
		return 0;
	case ETHTOOL_GRXFH:
		return nfp_net_get_rss_hash_opts(nn, cmd);
	default:
		return -EOPNOTSUPP;
	}
}

static int nfp_net_set_rss_hash_opt(struct nfp_net *nn,
				    struct ethtool_rxnfc *nfc)
{
	u32 new_rss_cfg = nn->rss_cfg;
	u32 nfp_rss_flag;
	int err;

	if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
		return -EOPNOTSUPP;

	/* RSS only supports IP SA/DA and L4 src/dst ports  */
	if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
			  RXH_L4_B_0_1 | RXH_L4_B_2_3))
		return -EINVAL;

	/* We need at least the IP SA/DA fields for hashing */
	if (!(nfc->data & RXH_IP_SRC) ||
	    !(nfc->data & RXH_IP_DST))
		return -EINVAL;

	nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type);
	if (!nfp_rss_flag)
		return -EINVAL;

	switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
	case 0:
		new_rss_cfg &= ~nfp_rss_flag;
		break;
	case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
		new_rss_cfg |= nfp_rss_flag;
		break;
	default:
		return -EINVAL;
	}

	new_rss_cfg |= NFP_NET_CFG_RSS_TOEPLITZ;
	new_rss_cfg |= NFP_NET_CFG_RSS_MASK;

	if (new_rss_cfg == nn->rss_cfg)
		return 0;

	writel(new_rss_cfg, nn->ctrl_bar + NFP_NET_CFG_RSS_CTRL);
	err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS);
	if (err)
		return err;

	nn->rss_cfg = new_rss_cfg;

	nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg);
	return 0;
}

static int nfp_net_set_rxnfc(struct net_device *netdev,
			     struct ethtool_rxnfc *cmd)
{
	struct nfp_net *nn = netdev_priv(netdev);

	switch (cmd->cmd) {
	case ETHTOOL_SRXFH:
		return nfp_net_set_rss_hash_opt(nn, cmd);
	default:
		return -EOPNOTSUPP;
	}
}

static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev)
{
	struct nfp_net *nn = netdev_priv(netdev);

	if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
		return 0;

	return ARRAY_SIZE(nn->rss_itbl);
}

static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev)
{
	return NFP_NET_CFG_RSS_KEY_SZ;
}

static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
			    u8 *hfunc)
{
	struct nfp_net *nn = netdev_priv(netdev);
	int i;

	if (!(nn->cap & NFP_NET_CFG_CTRL_RSS))
		return -EOPNOTSUPP;

	if (indir)
		for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++)
			indir[i] = nn->rss_itbl[i];
	if (key)
		memcpy(key, nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ);
	if (hfunc)
		*hfunc = ETH_RSS_HASH_TOP;

	return 0;
}

static int nfp_net_set_rxfh(struct net_device *netdev,
			    const u32 *indir, const u8 *key,
			    const u8 hfunc)
{
	struct nfp_net *nn = netdev_priv(netdev);
	int i;

	if (!(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
	    !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == ETH_RSS_HASH_TOP))
		return -EOPNOTSUPP;

	if (!key && !indir)
		return 0;

	if (key) {
		memcpy(nn->rss_key, key, NFP_NET_CFG_RSS_KEY_SZ);
		nfp_net_rss_write_key(nn);
	}
	if (indir) {
		for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++)
			nn->rss_itbl[i] = indir[i];

		nfp_net_rss_write_itbl(nn);
	}

	return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS);
}

/* Dump BAR registers
 */
static int nfp_net_get_regs_len(struct net_device *netdev)
{
	return NFP_NET_CFG_BAR_SZ;
}

static void nfp_net_get_regs(struct net_device *netdev,
			     struct ethtool_regs *regs, void *p)
{
	struct nfp_net *nn = netdev_priv(netdev);
	u32 *regs_buf = p;
	int i;

	regs->version = nn_readl(nn, NFP_NET_CFG_VERSION);

	for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++)
		regs_buf[i] = readl(nn->ctrl_bar + (i * sizeof(u32)));
}

static int nfp_net_get_coalesce(struct net_device *netdev,
				struct ethtool_coalesce *ec)
{
	struct nfp_net *nn = netdev_priv(netdev);

	if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD))
		return -EINVAL;

	ec->rx_coalesce_usecs       = nn->rx_coalesce_usecs;
	ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames;
	ec->tx_coalesce_usecs       = nn->tx_coalesce_usecs;
	ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames;

	return 0;
}

static int nfp_net_set_coalesce(struct net_device *netdev,
				struct ethtool_coalesce *ec)
{
	struct nfp_net *nn = netdev_priv(netdev);
	unsigned int factor;

	if (ec->rx_coalesce_usecs_irq ||
	    ec->rx_max_coalesced_frames_irq ||
	    ec->tx_coalesce_usecs_irq ||
	    ec->tx_max_coalesced_frames_irq ||
	    ec->stats_block_coalesce_usecs ||
	    ec->use_adaptive_rx_coalesce ||
	    ec->use_adaptive_tx_coalesce ||
	    ec->pkt_rate_low ||
	    ec->rx_coalesce_usecs_low ||
	    ec->rx_max_coalesced_frames_low ||
	    ec->tx_coalesce_usecs_low ||
	    ec->tx_max_coalesced_frames_low ||
	    ec->pkt_rate_high ||
	    ec->rx_coalesce_usecs_high ||
	    ec->rx_max_coalesced_frames_high ||
	    ec->tx_coalesce_usecs_high ||
	    ec->tx_max_coalesced_frames_high ||
	    ec->rate_sample_interval)
		return -ENOTSUPP;

	/* Compute factor used to convert coalesce '_usecs' parameters to
	 * ME timestamp ticks.  There are 16 ME clock cycles for each timestamp
	 * count.
	 */
	factor = nn->me_freq_mhz / 16;

	/* Each pair of (usecs, max_frames) fields specifies that interrupts
	 * should be coalesced until
	 *      (usecs > 0 && time_since_first_completion >= usecs) ||
	 *      (max_frames > 0 && completed_frames >= max_frames)
	 *
	 * It is illegal to set both usecs and max_frames to zero as this would
	 * cause interrupts to never be generated.  To disable coalescing, set
	 * usecs = 0 and max_frames = 1.
	 *
	 * Some implementations ignore the value of max_frames and use the
	 * condition time_since_first_completion >= usecs
	 */

	if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD))
		return -EINVAL;

	/* ensure valid configuration */
	if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames)
		return -EINVAL;

	if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames)
		return -EINVAL;

	if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1))
		return -EINVAL;

	if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1))
		return -EINVAL;

	if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1))
		return -EINVAL;

	if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1))
		return -EINVAL;

	/* configuration is valid */
	nn->rx_coalesce_usecs      = ec->rx_coalesce_usecs;
	nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames;
	nn->tx_coalesce_usecs      = ec->tx_coalesce_usecs;
	nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames;

	/* write configuration to device */
	nfp_net_coalesce_write_cfg(nn);
	return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
}

static const struct ethtool_ops nfp_net_ethtool_ops = {
	.get_drvinfo		= nfp_net_get_drvinfo,
	.get_link		= ethtool_op_get_link,
	.get_ringparam		= nfp_net_get_ringparam,
	.set_ringparam		= nfp_net_set_ringparam,
	.get_strings		= nfp_net_get_strings,
	.get_ethtool_stats	= nfp_net_get_stats,
	.get_sset_count		= nfp_net_get_sset_count,
	.get_rxnfc		= nfp_net_get_rxnfc,
	.set_rxnfc		= nfp_net_set_rxnfc,
	.get_rxfh_indir_size	= nfp_net_get_rxfh_indir_size,
	.get_rxfh_key_size	= nfp_net_get_rxfh_key_size,
	.get_rxfh		= nfp_net_get_rxfh,
	.set_rxfh		= nfp_net_set_rxfh,
	.get_regs_len		= nfp_net_get_regs_len,
	.get_regs		= nfp_net_get_regs,
	.get_coalesce           = nfp_net_get_coalesce,
	.set_coalesce           = nfp_net_set_coalesce,
};

void nfp_net_set_ethtool_ops(struct net_device *netdev)
{
	netdev->ethtool_ops = &nfp_net_ethtool_ops;
}
OpenPOWER on IntegriCloud