summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/pensando/ionic/ionic_main.c
blob: fbc57de6683efe5888c14b8818d55e3bae0c5b8a (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
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */

#include <linux/printk.h>
#include <linux/dynamic_debug.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/utsname.h>
#include <generated/utsrelease.h>

#include "ionic.h"
#include "ionic_bus.h"
#include "ionic_lif.h"
#include "ionic_debugfs.h"

MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
MODULE_AUTHOR("Pensando Systems, Inc");
MODULE_LICENSE("GPL");

static const char *ionic_error_to_str(enum ionic_status_code code)
{
	switch (code) {
	case IONIC_RC_SUCCESS:
		return "IONIC_RC_SUCCESS";
	case IONIC_RC_EVERSION:
		return "IONIC_RC_EVERSION";
	case IONIC_RC_EOPCODE:
		return "IONIC_RC_EOPCODE";
	case IONIC_RC_EIO:
		return "IONIC_RC_EIO";
	case IONIC_RC_EPERM:
		return "IONIC_RC_EPERM";
	case IONIC_RC_EQID:
		return "IONIC_RC_EQID";
	case IONIC_RC_EQTYPE:
		return "IONIC_RC_EQTYPE";
	case IONIC_RC_ENOENT:
		return "IONIC_RC_ENOENT";
	case IONIC_RC_EINTR:
		return "IONIC_RC_EINTR";
	case IONIC_RC_EAGAIN:
		return "IONIC_RC_EAGAIN";
	case IONIC_RC_ENOMEM:
		return "IONIC_RC_ENOMEM";
	case IONIC_RC_EFAULT:
		return "IONIC_RC_EFAULT";
	case IONIC_RC_EBUSY:
		return "IONIC_RC_EBUSY";
	case IONIC_RC_EEXIST:
		return "IONIC_RC_EEXIST";
	case IONIC_RC_EINVAL:
		return "IONIC_RC_EINVAL";
	case IONIC_RC_ENOSPC:
		return "IONIC_RC_ENOSPC";
	case IONIC_RC_ERANGE:
		return "IONIC_RC_ERANGE";
	case IONIC_RC_BAD_ADDR:
		return "IONIC_RC_BAD_ADDR";
	case IONIC_RC_DEV_CMD:
		return "IONIC_RC_DEV_CMD";
	case IONIC_RC_ENOSUPP:
		return "IONIC_RC_ENOSUPP";
	case IONIC_RC_ERROR:
		return "IONIC_RC_ERROR";
	case IONIC_RC_ERDMA:
		return "IONIC_RC_ERDMA";
	case IONIC_RC_EBAD_FW:
		return "IONIC_RC_EBAD_FW";
	default:
		return "IONIC_RC_UNKNOWN";
	}
}

static int ionic_error_to_errno(enum ionic_status_code code)
{
	switch (code) {
	case IONIC_RC_SUCCESS:
		return 0;
	case IONIC_RC_EVERSION:
	case IONIC_RC_EQTYPE:
	case IONIC_RC_EQID:
	case IONIC_RC_EINVAL:
	case IONIC_RC_ENOSUPP:
		return -EINVAL;
	case IONIC_RC_EPERM:
		return -EPERM;
	case IONIC_RC_ENOENT:
		return -ENOENT;
	case IONIC_RC_EAGAIN:
		return -EAGAIN;
	case IONIC_RC_ENOMEM:
		return -ENOMEM;
	case IONIC_RC_EFAULT:
		return -EFAULT;
	case IONIC_RC_EBUSY:
		return -EBUSY;
	case IONIC_RC_EEXIST:
		return -EEXIST;
	case IONIC_RC_ENOSPC:
		return -ENOSPC;
	case IONIC_RC_ERANGE:
		return -ERANGE;
	case IONIC_RC_BAD_ADDR:
		return -EFAULT;
	case IONIC_RC_EOPCODE:
	case IONIC_RC_EINTR:
	case IONIC_RC_DEV_CMD:
	case IONIC_RC_ERROR:
	case IONIC_RC_ERDMA:
	case IONIC_RC_EIO:
	default:
		return -EIO;
	}
}

static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
{
	switch (opcode) {
	case IONIC_CMD_NOP:
		return "IONIC_CMD_NOP";
	case IONIC_CMD_INIT:
		return "IONIC_CMD_INIT";
	case IONIC_CMD_RESET:
		return "IONIC_CMD_RESET";
	case IONIC_CMD_IDENTIFY:
		return "IONIC_CMD_IDENTIFY";
	case IONIC_CMD_GETATTR:
		return "IONIC_CMD_GETATTR";
	case IONIC_CMD_SETATTR:
		return "IONIC_CMD_SETATTR";
	case IONIC_CMD_PORT_IDENTIFY:
		return "IONIC_CMD_PORT_IDENTIFY";
	case IONIC_CMD_PORT_INIT:
		return "IONIC_CMD_PORT_INIT";
	case IONIC_CMD_PORT_RESET:
		return "IONIC_CMD_PORT_RESET";
	case IONIC_CMD_PORT_GETATTR:
		return "IONIC_CMD_PORT_GETATTR";
	case IONIC_CMD_PORT_SETATTR:
		return "IONIC_CMD_PORT_SETATTR";
	case IONIC_CMD_LIF_INIT:
		return "IONIC_CMD_LIF_INIT";
	case IONIC_CMD_LIF_RESET:
		return "IONIC_CMD_LIF_RESET";
	case IONIC_CMD_LIF_IDENTIFY:
		return "IONIC_CMD_LIF_IDENTIFY";
	case IONIC_CMD_LIF_SETATTR:
		return "IONIC_CMD_LIF_SETATTR";
	case IONIC_CMD_LIF_GETATTR:
		return "IONIC_CMD_LIF_GETATTR";
	case IONIC_CMD_RX_MODE_SET:
		return "IONIC_CMD_RX_MODE_SET";
	case IONIC_CMD_RX_FILTER_ADD:
		return "IONIC_CMD_RX_FILTER_ADD";
	case IONIC_CMD_RX_FILTER_DEL:
		return "IONIC_CMD_RX_FILTER_DEL";
	case IONIC_CMD_Q_IDENTIFY:
		return "IONIC_CMD_Q_IDENTIFY";
	case IONIC_CMD_Q_INIT:
		return "IONIC_CMD_Q_INIT";
	case IONIC_CMD_Q_CONTROL:
		return "IONIC_CMD_Q_CONTROL";
	case IONIC_CMD_RDMA_RESET_LIF:
		return "IONIC_CMD_RDMA_RESET_LIF";
	case IONIC_CMD_RDMA_CREATE_EQ:
		return "IONIC_CMD_RDMA_CREATE_EQ";
	case IONIC_CMD_RDMA_CREATE_CQ:
		return "IONIC_CMD_RDMA_CREATE_CQ";
	case IONIC_CMD_RDMA_CREATE_ADMINQ:
		return "IONIC_CMD_RDMA_CREATE_ADMINQ";
	case IONIC_CMD_FW_DOWNLOAD:
		return "IONIC_CMD_FW_DOWNLOAD";
	case IONIC_CMD_FW_CONTROL:
		return "IONIC_CMD_FW_CONTROL";
	case IONIC_CMD_FW_DOWNLOAD_V1:
		return "IONIC_CMD_FW_DOWNLOAD_V1";
	case IONIC_CMD_FW_CONTROL_V1:
		return "IONIC_CMD_FW_CONTROL_V1";
	case IONIC_CMD_VF_GETATTR:
		return "IONIC_CMD_VF_GETATTR";
	case IONIC_CMD_VF_SETATTR:
		return "IONIC_CMD_VF_SETATTR";
	default:
		return "DEVCMD_UNKNOWN";
	}
}

static void ionic_adminq_flush(struct ionic_lif *lif)
{
	struct ionic_queue *q = &lif->adminqcq->q;
	struct ionic_desc_info *desc_info;

	spin_lock(&lif->adminq_lock);

	while (q->tail_idx != q->head_idx) {
		desc_info = &q->info[q->tail_idx];
		memset(desc_info->desc, 0, sizeof(union ionic_adminq_cmd));
		desc_info->cb = NULL;
		desc_info->cb_arg = NULL;
		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
	}
	spin_unlock(&lif->adminq_lock);
}

static int ionic_adminq_check_err(struct ionic_lif *lif,
				  struct ionic_admin_ctx *ctx,
				  bool timeout)
{
	struct net_device *netdev = lif->netdev;
	const char *opcode_str;
	const char *status_str;
	int err = 0;

	if (ctx->comp.comp.status || timeout) {
		opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
		status_str = ionic_error_to_str(ctx->comp.comp.status);
		err = timeout ? -ETIMEDOUT :
				ionic_error_to_errno(ctx->comp.comp.status);

		netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
			   opcode_str, ctx->cmd.cmd.opcode,
			   timeout ? "TIMEOUT" : status_str, err);

		if (timeout)
			ionic_adminq_flush(lif);
	}

	return err;
}

static void ionic_adminq_cb(struct ionic_queue *q,
			    struct ionic_desc_info *desc_info,
			    struct ionic_cq_info *cq_info, void *cb_arg)
{
	struct ionic_admin_ctx *ctx = cb_arg;
	struct ionic_admin_comp *comp;
	struct device *dev;

	if (!ctx)
		return;

	comp = cq_info->cq_desc;
	dev = &q->lif->netdev->dev;

	memcpy(&ctx->comp, comp, sizeof(*comp));

	dev_dbg(dev, "comp admin queue command:\n");
	dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
			 &ctx->comp, sizeof(ctx->comp), true);

	complete_all(&ctx->work);
}

static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
{
	struct ionic_desc_info *desc_info;
	struct ionic_queue *q;
	int err = 0;

	if (!lif->adminqcq)
		return -EIO;

	q = &lif->adminqcq->q;

	spin_lock(&lif->adminq_lock);
	if (!ionic_q_has_space(q, 1)) {
		err = -ENOSPC;
		goto err_out;
	}

	err = ionic_heartbeat_check(lif->ionic);
	if (err)
		goto err_out;

	desc_info = &q->info[q->head_idx];
	memcpy(desc_info->desc, &ctx->cmd, sizeof(ctx->cmd));

	dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
	dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
			 &ctx->cmd, sizeof(ctx->cmd), true);

	ionic_q_post(q, true, ionic_adminq_cb, ctx);

err_out:
	spin_unlock(&lif->adminq_lock);

	return err;
}

int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
{
	struct net_device *netdev = lif->netdev;
	unsigned long remaining;
	const char *name;
	int err;

	err = ionic_adminq_post(lif, ctx);
	if (err) {
		if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
			name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
			netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
				   name, ctx->cmd.cmd.opcode, err);
		}
		return err;
	}

	remaining = wait_for_completion_timeout(&ctx->work,
						HZ * (ulong)DEVCMD_TIMEOUT);
	return ionic_adminq_check_err(lif, ctx, (remaining == 0));
}

static void ionic_dev_cmd_clean(struct ionic *ionic)
{
	union __iomem ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;

	iowrite32(0, &regs->doorbell);
	memset_io(&regs->cmd, 0, sizeof(regs->cmd));
}

int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
{
	struct ionic_dev *idev = &ionic->idev;
	unsigned long start_time;
	unsigned long max_wait;
	unsigned long duration;
	int opcode;
	int hb = 0;
	int done;
	int err;

	/* Wait for dev cmd to complete, retrying if we get EAGAIN,
	 * but don't wait any longer than max_seconds.
	 */
	max_wait = jiffies + (max_seconds * HZ);
try_again:
	opcode = readb(&idev->dev_cmd_regs->cmd.cmd.opcode);
	start_time = jiffies;
	do {
		done = ionic_dev_cmd_done(idev);
		if (done)
			break;
		usleep_range(100, 200);

		/* Don't check the heartbeat on FW_CONTROL commands as they are
		 * notorious for interrupting the firmware's heartbeat update.
		 */
		if (opcode != IONIC_CMD_FW_CONTROL)
			hb = ionic_heartbeat_check(ionic);
	} while (!done && !hb && time_before(jiffies, max_wait));
	duration = jiffies - start_time;

	dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
		ionic_opcode_to_str(opcode), opcode,
		done, duration / HZ, duration);

	if (!done && hb) {
		/* It is possible (but unlikely) that FW was busy and missed a
		 * heartbeat check but is still alive and will process this
		 * request, so don't clean the dev_cmd in this case.
		 */
		dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
			 ionic_opcode_to_str(opcode), opcode);
		return -ENXIO;
	}

	if (!done && !time_before(jiffies, max_wait)) {
		ionic_dev_cmd_clean(ionic);
		dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
			 ionic_opcode_to_str(opcode), opcode, max_seconds);
		return -ETIMEDOUT;
	}

	err = ionic_dev_cmd_status(&ionic->idev);
	if (err) {
		if (err == IONIC_RC_EAGAIN &&
		    time_before(jiffies, (max_wait - HZ))) {
			dev_dbg(ionic->dev, "DEV_CMD %s (%d), %s (%d) retrying...\n",
				ionic_opcode_to_str(opcode), opcode,
				ionic_error_to_str(err), err);

			msleep(1000);
			iowrite32(0, &idev->dev_cmd_regs->done);
			iowrite32(1, &idev->dev_cmd_regs->doorbell);
			goto try_again;
		}

		if (!(opcode == IONIC_CMD_FW_CONTROL && err == IONIC_RC_EAGAIN))
			dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
				ionic_opcode_to_str(opcode), opcode,
				ionic_error_to_str(err), err);

		return ionic_error_to_errno(err);
	}

	return 0;
}

int ionic_setup(struct ionic *ionic)
{
	int err;

	err = ionic_dev_setup(ionic);
	if (err)
		return err;
	ionic_reset(ionic);

	return 0;
}

int ionic_identify(struct ionic *ionic)
{
	struct ionic_identity *ident = &ionic->ident;
	struct ionic_dev *idev = &ionic->idev;
	size_t sz;
	int err;

	memset(ident, 0, sizeof(*ident));

	ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
	strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
		sizeof(ident->drv.driver_ver_str) - 1);

	mutex_lock(&ionic->dev_cmd_lock);

	sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
	memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);

	ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	if (!err) {
		sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
		memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
	}
	mutex_unlock(&ionic->dev_cmd_lock);

	if (err) {
		dev_err(ionic->dev, "Cannot identify ionic: %dn", err);
		goto err_out;
	}

	err = ionic_lif_identify(ionic, IONIC_LIF_TYPE_CLASSIC,
				 &ionic->ident.lif);
	if (err) {
		dev_err(ionic->dev, "Cannot identify LIFs: %d\n", err);
		goto err_out;
	}

	return 0;

err_out:
	return err;
}

int ionic_init(struct ionic *ionic)
{
	struct ionic_dev *idev = &ionic->idev;
	int err;

	mutex_lock(&ionic->dev_cmd_lock);
	ionic_dev_cmd_init(idev);
	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	mutex_unlock(&ionic->dev_cmd_lock);

	return err;
}

int ionic_reset(struct ionic *ionic)
{
	struct ionic_dev *idev = &ionic->idev;
	int err;

	mutex_lock(&ionic->dev_cmd_lock);
	ionic_dev_cmd_reset(idev);
	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	mutex_unlock(&ionic->dev_cmd_lock);

	return err;
}

int ionic_port_identify(struct ionic *ionic)
{
	struct ionic_identity *ident = &ionic->ident;
	struct ionic_dev *idev = &ionic->idev;
	size_t sz;
	int err;

	mutex_lock(&ionic->dev_cmd_lock);

	ionic_dev_cmd_port_identify(idev);
	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	if (!err) {
		sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
		memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
	}

	mutex_unlock(&ionic->dev_cmd_lock);

	return err;
}

int ionic_port_init(struct ionic *ionic)
{
	struct ionic_identity *ident = &ionic->ident;
	struct ionic_dev *idev = &ionic->idev;
	size_t sz;
	int err;

	if (!idev->port_info) {
		idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
		idev->port_info = dma_alloc_coherent(ionic->dev,
						     idev->port_info_sz,
						     &idev->port_info_pa,
						     GFP_KERNEL);
		if (!idev->port_info)
			return -ENOMEM;
	}

	sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));

	mutex_lock(&ionic->dev_cmd_lock);

	memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
	ionic_dev_cmd_port_init(idev);
	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);

	ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
	(void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);

	mutex_unlock(&ionic->dev_cmd_lock);
	if (err) {
		dev_err(ionic->dev, "Failed to init port\n");
		dma_free_coherent(ionic->dev, idev->port_info_sz,
				  idev->port_info, idev->port_info_pa);
		idev->port_info = NULL;
		idev->port_info_pa = 0;
	}

	return err;
}

int ionic_port_reset(struct ionic *ionic)
{
	struct ionic_dev *idev = &ionic->idev;
	int err;

	if (!idev->port_info)
		return 0;

	mutex_lock(&ionic->dev_cmd_lock);
	ionic_dev_cmd_port_reset(idev);
	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	mutex_unlock(&ionic->dev_cmd_lock);

	dma_free_coherent(ionic->dev, idev->port_info_sz,
			  idev->port_info, idev->port_info_pa);

	idev->port_info = NULL;
	idev->port_info_pa = 0;

	if (err)
		dev_err(ionic->dev, "Failed to reset port\n");

	return err;
}

static int __init ionic_init_module(void)
{
	ionic_debugfs_create();
	return ionic_bus_register_driver();
}

static void __exit ionic_cleanup_module(void)
{
	ionic_bus_unregister_driver();
	ionic_debugfs_destroy();

	pr_info("%s removed\n", IONIC_DRV_NAME);
}

module_init(ionic_init_module);
module_exit(ionic_cleanup_module);