summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/qlogic/qede/qede_ptp.c
blob: 02adb513f4756cb58c423936213bdcb4158d1dfa (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
/* QLogic qede NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - 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.
 */
#include "qede_ptp.h"

struct qede_ptp {
	const struct qed_eth_ptp_ops	*ops;
	struct ptp_clock_info		clock_info;
	struct cyclecounter		cc;
	struct timecounter		tc;
	struct ptp_clock		*clock;
	struct work_struct		work;
	struct qede_dev			*edev;
	struct sk_buff			*tx_skb;

	/* ptp spinlock is used for protecting the cycle/time counter fields
	 * and, also for serializing the qed PTP API invocations.
	 */
	spinlock_t			lock;
	bool				hw_ts_ioctl_called;
	u16				tx_type;
	u16				rx_filter;
};

/**
 * qede_ptp_adjfreq
 * @ptp: the ptp clock structure
 * @ppb: parts per billion adjustment from base
 *
 * Adjust the frequency of the ptp cycle counter by the
 * indicated ppb from the base frequency.
 */
static int qede_ptp_adjfreq(struct ptp_clock_info *info, s32 ppb)
{
	struct qede_ptp *ptp = container_of(info, struct qede_ptp, clock_info);
	struct qede_dev *edev = ptp->edev;
	int rc;

	__qede_lock(edev);
	if (edev->state == QEDE_STATE_OPEN) {
		spin_lock_bh(&ptp->lock);
		rc = ptp->ops->adjfreq(edev->cdev, ppb);
		spin_unlock_bh(&ptp->lock);
	} else {
		DP_ERR(edev, "PTP adjfreq called while interface is down\n");
		rc = -EFAULT;
	}
	__qede_unlock(edev);

	return rc;
}

static int qede_ptp_adjtime(struct ptp_clock_info *info, s64 delta)
{
	struct qede_dev *edev;
	struct qede_ptp *ptp;

	ptp = container_of(info, struct qede_ptp, clock_info);
	edev = ptp->edev;

	DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP adjtime called, delta = %llx\n",
		   delta);

	spin_lock_bh(&ptp->lock);
	timecounter_adjtime(&ptp->tc, delta);
	spin_unlock_bh(&ptp->lock);

	return 0;
}

static int qede_ptp_gettime(struct ptp_clock_info *info, struct timespec64 *ts)
{
	struct qede_dev *edev;
	struct qede_ptp *ptp;
	u64 ns;

	ptp = container_of(info, struct qede_ptp, clock_info);
	edev = ptp->edev;

	spin_lock_bh(&ptp->lock);
	ns = timecounter_read(&ptp->tc);
	spin_unlock_bh(&ptp->lock);

	DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP gettime called, ns = %llu\n", ns);

	*ts = ns_to_timespec64(ns);

	return 0;
}

static int qede_ptp_settime(struct ptp_clock_info *info,
			    const struct timespec64 *ts)
{
	struct qede_dev *edev;
	struct qede_ptp *ptp;
	u64 ns;

	ptp = container_of(info, struct qede_ptp, clock_info);
	edev = ptp->edev;

	ns = timespec64_to_ns(ts);

	DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP settime called, ns = %llu\n", ns);

	/* Re-init the timecounter */
	spin_lock_bh(&ptp->lock);
	timecounter_init(&ptp->tc, &ptp->cc, ns);
	spin_unlock_bh(&ptp->lock);

	return 0;
}

/* Enable (or disable) ancillary features of the phc subsystem */
static int qede_ptp_ancillary_feature_enable(struct ptp_clock_info *info,
					     struct ptp_clock_request *rq,
					     int on)
{
	struct qede_dev *edev;
	struct qede_ptp *ptp;

	ptp = container_of(info, struct qede_ptp, clock_info);
	edev = ptp->edev;

	DP_ERR(edev, "PHC ancillary features are not supported\n");

	return -ENOTSUPP;
}

static void qede_ptp_task(struct work_struct *work)
{
	struct skb_shared_hwtstamps shhwtstamps;
	struct qede_dev *edev;
	struct qede_ptp *ptp;
	u64 timestamp, ns;
	int rc;

	ptp = container_of(work, struct qede_ptp, work);
	edev = ptp->edev;

	/* Read Tx timestamp registers */
	spin_lock_bh(&ptp->lock);
	rc = ptp->ops->read_tx_ts(edev->cdev, &timestamp);
	spin_unlock_bh(&ptp->lock);
	if (rc) {
		/* Reschedule to keep checking for a valid timestamp value */
		schedule_work(&ptp->work);
		return;
	}

	ns = timecounter_cyc2time(&ptp->tc, timestamp);
	memset(&shhwtstamps, 0, sizeof(shhwtstamps));
	shhwtstamps.hwtstamp = ns_to_ktime(ns);
	skb_tstamp_tx(ptp->tx_skb, &shhwtstamps);
	dev_kfree_skb_any(ptp->tx_skb);
	ptp->tx_skb = NULL;
	clear_bit_unlock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags);

	DP_VERBOSE(edev, QED_MSG_DEBUG,
		   "Tx timestamp, timestamp cycles = %llu, ns = %llu\n",
		   timestamp, ns);
}

/* Read the PHC. This API is invoked with ptp_lock held. */
static u64 qede_ptp_read_cc(const struct cyclecounter *cc)
{
	struct qede_dev *edev;
	struct qede_ptp *ptp;
	u64 phc_cycles;
	int rc;

	ptp = container_of(cc, struct qede_ptp, cc);
	edev = ptp->edev;
	rc = ptp->ops->read_cc(edev->cdev, &phc_cycles);
	if (rc)
		WARN_ONCE(1, "PHC read err %d\n", rc);

	DP_VERBOSE(edev, QED_MSG_DEBUG, "PHC read cycles = %llu\n", phc_cycles);

	return phc_cycles;
}

static int qede_ptp_cfg_filters(struct qede_dev *edev)
{
	enum qed_ptp_hwtstamp_tx_type tx_type = QED_PTP_HWTSTAMP_TX_ON;
	enum qed_ptp_filter_type rx_filter = QED_PTP_FILTER_NONE;
	struct qede_ptp *ptp = edev->ptp;

	if (!ptp)
		return -EIO;

	if (!ptp->hw_ts_ioctl_called) {
		DP_INFO(edev, "TS IOCTL not called\n");
		return 0;
	}

	switch (ptp->tx_type) {
	case HWTSTAMP_TX_ON:
		edev->flags |= QEDE_TX_TIMESTAMPING_EN;
		tx_type = QED_PTP_HWTSTAMP_TX_ON;
		break;

	case HWTSTAMP_TX_OFF:
		edev->flags &= ~QEDE_TX_TIMESTAMPING_EN;
		tx_type = QED_PTP_HWTSTAMP_TX_OFF;
		break;

	case HWTSTAMP_TX_ONESTEP_SYNC:
		DP_ERR(edev, "One-step timestamping is not supported\n");
		return -ERANGE;
	}

	spin_lock_bh(&ptp->lock);
	switch (ptp->rx_filter) {
	case HWTSTAMP_FILTER_NONE:
		rx_filter = QED_PTP_FILTER_NONE;
		break;
	case HWTSTAMP_FILTER_ALL:
	case HWTSTAMP_FILTER_SOME:
	case HWTSTAMP_FILTER_NTP_ALL:
		ptp->rx_filter = HWTSTAMP_FILTER_NONE;
		rx_filter = QED_PTP_FILTER_ALL;
		break;
	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
		rx_filter = QED_PTP_FILTER_V1_L4_EVENT;
		break;
	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
		/* Initialize PTP detection for UDP/IPv4 events */
		rx_filter = QED_PTP_FILTER_V1_L4_GEN;
		break;
	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
		rx_filter = QED_PTP_FILTER_V2_L4_EVENT;
		break;
	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
		/* Initialize PTP detection for UDP/IPv4 or UDP/IPv6 events */
		rx_filter = QED_PTP_FILTER_V2_L4_GEN;
		break;
	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
		rx_filter = QED_PTP_FILTER_V2_L2_EVENT;
		break;
	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
		/* Initialize PTP detection L2 events */
		rx_filter = QED_PTP_FILTER_V2_L2_GEN;
		break;
	case HWTSTAMP_FILTER_PTP_V2_EVENT:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
		rx_filter = QED_PTP_FILTER_V2_EVENT;
		break;
	case HWTSTAMP_FILTER_PTP_V2_SYNC:
	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
		/* Initialize PTP detection L2, UDP/IPv4 or UDP/IPv6 events */
		rx_filter = QED_PTP_FILTER_V2_GEN;
		break;
	}

	ptp->ops->cfg_filters(edev->cdev, rx_filter, tx_type);

	spin_unlock_bh(&ptp->lock);

	return 0;
}

int qede_ptp_hw_ts(struct qede_dev *edev, struct ifreq *ifr)
{
	struct hwtstamp_config config;
	struct qede_ptp *ptp;
	int rc;

	ptp = edev->ptp;
	if (!ptp)
		return -EIO;

	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
		return -EFAULT;

	DP_VERBOSE(edev, QED_MSG_DEBUG,
		   "HWTSTAMP IOCTL: Requested tx_type = %d, requested rx_filters = %d\n",
		   config.tx_type, config.rx_filter);

	if (config.flags) {
		DP_ERR(edev, "config.flags is reserved for future use\n");
		return -EINVAL;
	}

	ptp->hw_ts_ioctl_called = 1;
	ptp->tx_type = config.tx_type;
	ptp->rx_filter = config.rx_filter;

	rc = qede_ptp_cfg_filters(edev);
	if (rc)
		return rc;

	config.rx_filter = ptp->rx_filter;

	return copy_to_user(ifr->ifr_data, &config,
			    sizeof(config)) ? -EFAULT : 0;
}

int qede_ptp_get_ts_info(struct qede_dev *edev, struct ethtool_ts_info *info)
{
	struct qede_ptp *ptp = edev->ptp;

	if (!ptp)
		return -EIO;

	info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
				SOF_TIMESTAMPING_RX_SOFTWARE |
				SOF_TIMESTAMPING_SOFTWARE |
				SOF_TIMESTAMPING_TX_HARDWARE |
				SOF_TIMESTAMPING_RX_HARDWARE |
				SOF_TIMESTAMPING_RAW_HARDWARE;

	if (ptp->clock)
		info->phc_index = ptp_clock_index(ptp->clock);
	else
		info->phc_index = -1;

	info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
			   BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
			   BIT(HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
			   BIT(HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_SYNC) |
			   BIT(HWTSTAMP_FILTER_PTP_V2_DELAY_REQ);

	info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON);

	return 0;
}

void qede_ptp_disable(struct qede_dev *edev)
{
	struct qede_ptp *ptp;

	ptp = edev->ptp;
	if (!ptp)
		return;

	if (ptp->clock) {
		ptp_clock_unregister(ptp->clock);
		ptp->clock = NULL;
	}

	/* Cancel PTP work queue. Should be done after the Tx queues are
	 * drained to prevent additional scheduling.
	 */
	cancel_work_sync(&ptp->work);
	if (ptp->tx_skb) {
		dev_kfree_skb_any(ptp->tx_skb);
		ptp->tx_skb = NULL;
	}

	/* Disable PTP in HW */
	spin_lock_bh(&ptp->lock);
	ptp->ops->disable(edev->cdev);
	spin_unlock_bh(&ptp->lock);

	kfree(ptp);
	edev->ptp = NULL;
}

static int qede_ptp_init(struct qede_dev *edev, bool init_tc)
{
	struct qede_ptp *ptp;
	int rc;

	ptp = edev->ptp;
	if (!ptp)
		return -EINVAL;

	spin_lock_init(&ptp->lock);

	/* Configure PTP in HW */
	rc = ptp->ops->enable(edev->cdev);
	if (rc) {
		DP_INFO(edev, "PTP HW enable failed\n");
		return rc;
	}

	/* Init work queue for Tx timestamping */
	INIT_WORK(&ptp->work, qede_ptp_task);

	/* Init cyclecounter and timecounter. This is done only in the first
	 * load. If done in every load, PTP application will fail when doing
	 * unload / load (e.g. MTU change) while it is running.
	 */
	if (init_tc) {
		memset(&ptp->cc, 0, sizeof(ptp->cc));
		ptp->cc.read = qede_ptp_read_cc;
		ptp->cc.mask = CYCLECOUNTER_MASK(64);
		ptp->cc.shift = 0;
		ptp->cc.mult = 1;

		timecounter_init(&ptp->tc, &ptp->cc,
				 ktime_to_ns(ktime_get_real()));
	}

	return rc;
}

int qede_ptp_enable(struct qede_dev *edev, bool init_tc)
{
	struct qede_ptp *ptp;
	int rc;

	ptp = kzalloc(sizeof(*ptp), GFP_KERNEL);
	if (!ptp) {
		DP_INFO(edev, "Failed to allocate struct for PTP\n");
		return -ENOMEM;
	}

	ptp->edev = edev;
	ptp->ops = edev->ops->ptp;
	if (!ptp->ops) {
		DP_INFO(edev, "PTP enable failed\n");
		rc = -EIO;
		goto err1;
	}

	edev->ptp = ptp;

	rc = qede_ptp_init(edev, init_tc);
	if (rc)
		goto err1;

	qede_ptp_cfg_filters(edev);

	/* Fill the ptp_clock_info struct and register PTP clock */
	ptp->clock_info.owner = THIS_MODULE;
	snprintf(ptp->clock_info.name, 16, "%s", edev->ndev->name);
	ptp->clock_info.max_adj = QED_MAX_PHC_DRIFT_PPB;
	ptp->clock_info.n_alarm = 0;
	ptp->clock_info.n_ext_ts = 0;
	ptp->clock_info.n_per_out = 0;
	ptp->clock_info.pps = 0;
	ptp->clock_info.adjfreq = qede_ptp_adjfreq;
	ptp->clock_info.adjtime = qede_ptp_adjtime;
	ptp->clock_info.gettime64 = qede_ptp_gettime;
	ptp->clock_info.settime64 = qede_ptp_settime;
	ptp->clock_info.enable = qede_ptp_ancillary_feature_enable;

	ptp->clock = ptp_clock_register(&ptp->clock_info, &edev->pdev->dev);
	if (IS_ERR(ptp->clock)) {
		rc = -EINVAL;
		DP_ERR(edev, "PTP clock registration failed\n");
		goto err2;
	}

	return 0;

err2:
	qede_ptp_disable(edev);
	ptp->clock = NULL;
err1:
	kfree(ptp);
	edev->ptp = NULL;

	return rc;
}

void qede_ptp_tx_ts(struct qede_dev *edev, struct sk_buff *skb)
{
	struct qede_ptp *ptp;

	ptp = edev->ptp;
	if (!ptp)
		return;

	if (test_and_set_bit_lock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags))
		return;

	if (unlikely(!(edev->flags & QEDE_TX_TIMESTAMPING_EN))) {
		DP_NOTICE(edev,
			  "Tx timestamping was not enabled, this packet will not be timestamped\n");
	} else if (unlikely(ptp->tx_skb)) {
		DP_NOTICE(edev,
			  "The device supports only a single outstanding packet to timestamp, this packet will not be timestamped\n");
	} else {
		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
		/* schedule check for Tx timestamp */
		ptp->tx_skb = skb_get(skb);
		schedule_work(&ptp->work);
	}
}

void qede_ptp_rx_ts(struct qede_dev *edev, struct sk_buff *skb)
{
	struct qede_ptp *ptp;
	u64 timestamp, ns;
	int rc;

	ptp = edev->ptp;
	if (!ptp)
		return;

	spin_lock_bh(&ptp->lock);
	rc = ptp->ops->read_rx_ts(edev->cdev, &timestamp);
	if (rc) {
		spin_unlock_bh(&ptp->lock);
		DP_INFO(edev, "Invalid Rx timestamp\n");
		return;
	}

	ns = timecounter_cyc2time(&ptp->tc, timestamp);
	spin_unlock_bh(&ptp->lock);
	skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(ns);
	DP_VERBOSE(edev, QED_MSG_DEBUG,
		   "Rx timestamp, timestamp cycles = %llu, ns = %llu\n",
		   timestamp, ns);
}