summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/intel/ice/ice_debugfs.c
blob: 9fc0fd95a13d8f2c40475a94f38d3a2c088ab6f4 (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
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2022, Intel Corporation. */

#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/random.h>
#include <linux/vmalloc.h>
#include "ice.h"

static struct dentry *ice_debugfs_root;

/* create a define that has an extra module that doesn't really exist. this
 * is so we can add a module 'all' to easily enable/disable all the modules
 */
#define ICE_NR_FW_LOG_MODULES (ICE_AQC_FW_LOG_ID_MAX + 1)

/* the ordering in this array is important. it matches the ordering of the
 * values in the FW so the index is the same value as in ice_aqc_fw_logging_mod
 */
static const char * const ice_fwlog_module_string[] = {
	"general",
	"ctrl",
	"link",
	"link_topo",
	"dnl",
	"i2c",
	"sdp",
	"mdio",
	"adminq",
	"hdma",
	"lldp",
	"dcbx",
	"dcb",
	"xlr",
	"nvm",
	"auth",
	"vpd",
	"iosf",
	"parser",
	"sw",
	"scheduler",
	"txq",
	"rsvd",
	"post",
	"watchdog",
	"task_dispatch",
	"mng",
	"synce",
	"health",
	"tsdrv",
	"pfreg",
	"mdlver",
	"all",
};

/* the ordering in this array is important. it matches the ordering of the
 * values in the FW so the index is the same value as in ice_fwlog_level
 */
static const char * const ice_fwlog_level_string[] = {
	"none",
	"error",
	"warning",
	"normal",
	"verbose",
};

static const char * const ice_fwlog_log_size[] = {
	"128K",
	"256K",
	"512K",
	"1M",
	"2M",
};

/**
 * ice_fwlog_print_module_cfg - print current FW logging module configuration
 * @hw: pointer to the HW structure
 * @module: module to print
 * @s: the seq file to put data into
 */
static void
ice_fwlog_print_module_cfg(struct ice_hw *hw, int module, struct seq_file *s)
{
	struct ice_fwlog_cfg *cfg = &hw->fwlog_cfg;
	struct ice_fwlog_module_entry *entry;

	if (module != ICE_AQC_FW_LOG_ID_MAX) {
		entry =	&cfg->module_entries[module];

		seq_printf(s, "\tModule: %s, Log Level: %s\n",
			   ice_fwlog_module_string[entry->module_id],
			   ice_fwlog_level_string[entry->log_level]);
	} else {
		int i;

		for (i = 0; i < ICE_AQC_FW_LOG_ID_MAX; i++) {
			entry =	&cfg->module_entries[i];

			seq_printf(s, "\tModule: %s, Log Level: %s\n",
				   ice_fwlog_module_string[entry->module_id],
				   ice_fwlog_level_string[entry->log_level]);
		}
	}
}

static int ice_find_module_by_dentry(struct ice_pf *pf, struct dentry *d)
{
	int i, module;

	module = -1;
	/* find the module based on the dentry */
	for (i = 0; i < ICE_NR_FW_LOG_MODULES; i++) {
		if (d == pf->ice_debugfs_pf_fwlog_modules[i]) {
			module = i;
			break;
		}
	}

	return module;
}

/**
 * ice_debugfs_module_show - read from 'module' file
 * @s: the opened file
 * @v: pointer to the offset
 */
static int ice_debugfs_module_show(struct seq_file *s, void *v)
{
	const struct file *filp = s->file;
	struct dentry *dentry;
	struct ice_pf *pf;
	int module;

	dentry = file_dentry(filp);
	pf = s->private;

	module = ice_find_module_by_dentry(pf, dentry);
	if (module < 0) {
		dev_info(ice_pf_to_dev(pf), "unknown module\n");
		return -EINVAL;
	}

	ice_fwlog_print_module_cfg(&pf->hw, module, s);

	return 0;
}

static int ice_debugfs_module_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, ice_debugfs_module_show, inode->i_private);
}

/**
 * ice_debugfs_module_write - write into 'module' file
 * @filp: the opened file
 * @buf: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 */
static ssize_t
ice_debugfs_module_write(struct file *filp, const char __user *buf,
			 size_t count, loff_t *ppos)
{
	struct ice_pf *pf = file_inode(filp)->i_private;
	struct dentry *dentry = file_dentry(filp);
	struct device *dev = ice_pf_to_dev(pf);
	char user_val[16], *cmd_buf;
	int module, log_level, cnt;

	/* don't allow partial writes or invalid input */
	if (*ppos != 0 || count > 8)
		return -EINVAL;

	cmd_buf = memdup_user_nul(buf, count);
	if (IS_ERR(cmd_buf))
		return PTR_ERR(cmd_buf);

	module = ice_find_module_by_dentry(pf, dentry);
	if (module < 0) {
		dev_info(dev, "unknown module\n");
		return -EINVAL;
	}

	cnt = sscanf(cmd_buf, "%s", user_val);
	if (cnt != 1)
		return -EINVAL;

	log_level = sysfs_match_string(ice_fwlog_level_string, user_val);
	if (log_level < 0) {
		dev_info(dev, "unknown log level '%s'\n", user_val);
		return -EINVAL;
	}

	if (module != ICE_AQC_FW_LOG_ID_MAX) {
		ice_pf_fwlog_update_module(pf, log_level, module);
	} else {
		/* the module 'all' is a shortcut so that we can set
		 * all of the modules to the same level quickly
		 */
		int i;

		for (i = 0; i < ICE_AQC_FW_LOG_ID_MAX; i++)
			ice_pf_fwlog_update_module(pf, log_level, i);
	}

	return count;
}

static const struct file_operations ice_debugfs_module_fops = {
	.owner = THIS_MODULE,
	.open  = ice_debugfs_module_open,
	.read = seq_read,
	.release = single_release,
	.write = ice_debugfs_module_write,
};

/**
 * ice_debugfs_nr_messages_read - read from 'nr_messages' file
 * @filp: the opened file
 * @buffer: where to write the data for the user to read
 * @count: the size of the user's buffer
 * @ppos: file position offset
 */
static ssize_t ice_debugfs_nr_messages_read(struct file *filp,
					    char __user *buffer, size_t count,
					    loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct ice_hw *hw = &pf->hw;
	char buff[32] = {};

	snprintf(buff, sizeof(buff), "%d\n",
		 hw->fwlog_cfg.log_resolution);

	return simple_read_from_buffer(buffer, count, ppos, buff, strlen(buff));
}

/**
 * ice_debugfs_nr_messages_write - write into 'nr_messages' file
 * @filp: the opened file
 * @buf: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 */
static ssize_t
ice_debugfs_nr_messages_write(struct file *filp, const char __user *buf,
			      size_t count, loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct device *dev = ice_pf_to_dev(pf);
	struct ice_hw *hw = &pf->hw;
	char user_val[8], *cmd_buf;
	s16 nr_messages;
	ssize_t ret;

	/* don't allow partial writes or invalid input */
	if (*ppos != 0 || count > 4)
		return -EINVAL;

	cmd_buf = memdup_user_nul(buf, count);
	if (IS_ERR(cmd_buf))
		return PTR_ERR(cmd_buf);

	ret = sscanf(cmd_buf, "%s", user_val);
	if (ret != 1)
		return -EINVAL;

	ret = kstrtos16(user_val, 0, &nr_messages);
	if (ret)
		return ret;

	if (nr_messages < ICE_AQC_FW_LOG_MIN_RESOLUTION ||
	    nr_messages > ICE_AQC_FW_LOG_MAX_RESOLUTION) {
		dev_err(dev, "Invalid FW log number of messages %d, value must be between %d - %d\n",
			nr_messages, ICE_AQC_FW_LOG_MIN_RESOLUTION,
			ICE_AQC_FW_LOG_MAX_RESOLUTION);
		return -EINVAL;
	}

	hw->fwlog_cfg.log_resolution = nr_messages;

	return count;
}

static const struct file_operations ice_debugfs_nr_messages_fops = {
	.owner = THIS_MODULE,
	.open  = simple_open,
	.read = ice_debugfs_nr_messages_read,
	.write = ice_debugfs_nr_messages_write,
};

/**
 * ice_debugfs_enable_read - read from 'enable' file
 * @filp: the opened file
 * @buffer: where to write the data for the user to read
 * @count: the size of the user's buffer
 * @ppos: file position offset
 */
static ssize_t ice_debugfs_enable_read(struct file *filp,
				       char __user *buffer, size_t count,
				       loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct ice_hw *hw = &pf->hw;
	char buff[32] = {};

	snprintf(buff, sizeof(buff), "%u\n",
		 (u16)(hw->fwlog_cfg.options &
		 ICE_FWLOG_OPTION_IS_REGISTERED) >> 3);

	return simple_read_from_buffer(buffer, count, ppos, buff, strlen(buff));
}

/**
 * ice_debugfs_enable_write - write into 'enable' file
 * @filp: the opened file
 * @buf: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 */
static ssize_t
ice_debugfs_enable_write(struct file *filp, const char __user *buf,
			 size_t count, loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct ice_hw *hw = &pf->hw;
	char user_val[8], *cmd_buf;
	bool enable;
	ssize_t ret;

	/* don't allow partial writes or invalid input */
	if (*ppos != 0 || count > 2)
		return -EINVAL;

	cmd_buf = memdup_user_nul(buf, count);
	if (IS_ERR(cmd_buf))
		return PTR_ERR(cmd_buf);

	ret = sscanf(cmd_buf, "%s", user_val);
	if (ret != 1)
		return -EINVAL;

	ret = kstrtobool(user_val, &enable);
	if (ret)
		goto enable_write_error;

	if (enable)
		hw->fwlog_cfg.options |= ICE_FWLOG_OPTION_ARQ_ENA;
	else
		hw->fwlog_cfg.options &= ~ICE_FWLOG_OPTION_ARQ_ENA;

	ret = ice_fwlog_set(hw, &hw->fwlog_cfg);
	if (ret)
		goto enable_write_error;

	if (enable)
		ret = ice_fwlog_register(hw);
	else
		ret = ice_fwlog_unregister(hw);

	if (ret)
		goto enable_write_error;

	/* if we get here, nothing went wrong; return count since we didn't
	 * really write anything
	 */
	ret = (ssize_t)count;

enable_write_error:
	/* This function always consumes all of the written input, or produces
	 * an error. Check and enforce this. Otherwise, the write operation
	 * won't complete properly.
	 */
	if (WARN_ON(ret != (ssize_t)count && ret >= 0))
		ret = -EIO;

	return ret;
}

static const struct file_operations ice_debugfs_enable_fops = {
	.owner = THIS_MODULE,
	.open  = simple_open,
	.read = ice_debugfs_enable_read,
	.write = ice_debugfs_enable_write,
};

/**
 * ice_debugfs_log_size_read - read from 'log_size' file
 * @filp: the opened file
 * @buffer: where to write the data for the user to read
 * @count: the size of the user's buffer
 * @ppos: file position offset
 */
static ssize_t ice_debugfs_log_size_read(struct file *filp,
					 char __user *buffer, size_t count,
					 loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct ice_hw *hw = &pf->hw;
	char buff[32] = {};
	int index;

	index = hw->fwlog_ring.index;
	snprintf(buff, sizeof(buff), "%s\n", ice_fwlog_log_size[index]);

	return simple_read_from_buffer(buffer, count, ppos, buff, strlen(buff));
}

/**
 * ice_debugfs_log_size_write - write into 'log_size' file
 * @filp: the opened file
 * @buf: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 */
static ssize_t
ice_debugfs_log_size_write(struct file *filp, const char __user *buf,
			   size_t count, loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct device *dev = ice_pf_to_dev(pf);
	struct ice_hw *hw = &pf->hw;
	char user_val[8], *cmd_buf;
	ssize_t ret;
	int index;

	/* don't allow partial writes or invalid input */
	if (*ppos != 0 || count > 5)
		return -EINVAL;

	cmd_buf = memdup_user_nul(buf, count);
	if (IS_ERR(cmd_buf))
		return PTR_ERR(cmd_buf);

	ret = sscanf(cmd_buf, "%s", user_val);
	if (ret != 1)
		return -EINVAL;

	index = sysfs_match_string(ice_fwlog_log_size, user_val);
	if (index < 0) {
		dev_info(dev, "Invalid log size '%s'. The value must be one of 128K, 256K, 512K, 1M, 2M\n",
			 user_val);
		ret = -EINVAL;
		goto log_size_write_error;
	} else if (hw->fwlog_cfg.options & ICE_FWLOG_OPTION_IS_REGISTERED) {
		dev_info(dev, "FW logging is currently running. Please disable FW logging to change log_size\n");
		ret = -EINVAL;
		goto log_size_write_error;
	}

	/* free all the buffers and the tracking info and resize */
	ice_fwlog_realloc_rings(hw, index);

	/* if we get here, nothing went wrong; return count since we didn't
	 * really write anything
	 */
	ret = (ssize_t)count;

log_size_write_error:
	/* This function always consumes all of the written input, or produces
	 * an error. Check and enforce this. Otherwise, the write operation
	 * won't complete properly.
	 */
	if (WARN_ON(ret != (ssize_t)count && ret >= 0))
		ret = -EIO;

	return ret;
}

static const struct file_operations ice_debugfs_log_size_fops = {
	.owner = THIS_MODULE,
	.open  = simple_open,
	.read = ice_debugfs_log_size_read,
	.write = ice_debugfs_log_size_write,
};

/**
 * ice_debugfs_data_read - read from 'data' file
 * @filp: the opened file
 * @buffer: where to write the data for the user to read
 * @count: the size of the user's buffer
 * @ppos: file position offset
 */
static ssize_t ice_debugfs_data_read(struct file *filp, char __user *buffer,
				     size_t count, loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct ice_hw *hw = &pf->hw;
	int data_copied = 0;
	bool done = false;

	if (ice_fwlog_ring_empty(&hw->fwlog_ring))
		return 0;

	while (!ice_fwlog_ring_empty(&hw->fwlog_ring) && !done) {
		struct ice_fwlog_data *log;
		u16 cur_buf_len;

		log = &hw->fwlog_ring.rings[hw->fwlog_ring.head];
		cur_buf_len = log->data_size;
		if (cur_buf_len >= count) {
			done = true;
			continue;
		}

		if (copy_to_user(buffer, log->data, cur_buf_len)) {
			/* if there is an error then bail and return whatever
			 * the driver has copied so far
			 */
			done = true;
			continue;
		}

		data_copied += cur_buf_len;
		buffer += cur_buf_len;
		count -= cur_buf_len;
		*ppos += cur_buf_len;
		ice_fwlog_ring_increment(&hw->fwlog_ring.head,
					 hw->fwlog_ring.size);
	}

	return data_copied;
}

/**
 * ice_debugfs_data_write - write into 'data' file
 * @filp: the opened file
 * @buf: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 */
static ssize_t
ice_debugfs_data_write(struct file *filp, const char __user *buf, size_t count,
		       loff_t *ppos)
{
	struct ice_pf *pf = filp->private_data;
	struct device *dev = ice_pf_to_dev(pf);
	struct ice_hw *hw = &pf->hw;
	ssize_t ret;

	/* don't allow partial writes */
	if (*ppos != 0)
		return 0;

	/* any value is allowed to clear the buffer so no need to even look at
	 * what the value is
	 */
	if (!(hw->fwlog_cfg.options & ICE_FWLOG_OPTION_IS_REGISTERED)) {
		hw->fwlog_ring.head = 0;
		hw->fwlog_ring.tail = 0;
	} else {
		dev_info(dev, "Can't clear FW log data while FW log running\n");
		ret = -EINVAL;
		goto nr_buffs_write_error;
	}

	/* if we get here, nothing went wrong; return count since we didn't
	 * really write anything
	 */
	ret = (ssize_t)count;

nr_buffs_write_error:
	/* This function always consumes all of the written input, or produces
	 * an error. Check and enforce this. Otherwise, the write operation
	 * won't complete properly.
	 */
	if (WARN_ON(ret != (ssize_t)count && ret >= 0))
		ret = -EIO;

	return ret;
}

static const struct file_operations ice_debugfs_data_fops = {
	.owner = THIS_MODULE,
	.open  = simple_open,
	.read = ice_debugfs_data_read,
	.write = ice_debugfs_data_write,
};

/**
 * ice_debugfs_fwlog_init - setup the debugfs directory
 * @pf: the ice that is starting up
 */
void ice_debugfs_fwlog_init(struct ice_pf *pf)
{
	const char *name = pci_name(pf->pdev);
	struct dentry *fw_modules_dir;
	struct dentry **fw_modules;
	int i;

	/* only support fw log commands on PF 0 */
	if (pf->hw.bus.func)
		return;

	/* allocate space for this first because if it fails then we don't
	 * need to unwind
	 */
	fw_modules = kcalloc(ICE_NR_FW_LOG_MODULES, sizeof(*fw_modules),
			     GFP_KERNEL);
	if (!fw_modules)
		return;

	pf->ice_debugfs_pf = debugfs_create_dir(name, ice_debugfs_root);
	if (IS_ERR(pf->ice_debugfs_pf))
		goto err_create_module_files;

	pf->ice_debugfs_pf_fwlog = debugfs_create_dir("fwlog",
						      pf->ice_debugfs_pf);
	if (IS_ERR(pf->ice_debugfs_pf))
		goto err_create_module_files;

	fw_modules_dir = debugfs_create_dir("modules",
					    pf->ice_debugfs_pf_fwlog);
	if (IS_ERR(fw_modules_dir))
		goto err_create_module_files;

	for (i = 0; i < ICE_NR_FW_LOG_MODULES; i++) {
		fw_modules[i] = debugfs_create_file(ice_fwlog_module_string[i],
						    0600, fw_modules_dir, pf,
						    &ice_debugfs_module_fops);
		if (IS_ERR(fw_modules[i]))
			goto err_create_module_files;
	}

	debugfs_create_file("nr_messages", 0600,
			    pf->ice_debugfs_pf_fwlog, pf,
			    &ice_debugfs_nr_messages_fops);

	pf->ice_debugfs_pf_fwlog_modules = fw_modules;

	debugfs_create_file("enable", 0600, pf->ice_debugfs_pf_fwlog,
			    pf, &ice_debugfs_enable_fops);

	debugfs_create_file("log_size", 0600, pf->ice_debugfs_pf_fwlog,
			    pf, &ice_debugfs_log_size_fops);

	debugfs_create_file("data", 0600, pf->ice_debugfs_pf_fwlog,
			    pf, &ice_debugfs_data_fops);

	return;

err_create_module_files:
	debugfs_remove_recursive(pf->ice_debugfs_pf_fwlog);
	kfree(fw_modules);
}

/**
 * ice_debugfs_pf_deinit - cleanup PF's debugfs
 * @pf: pointer to the PF struct
 */
void ice_debugfs_pf_deinit(struct ice_pf *pf)
{
	debugfs_remove_recursive(pf->ice_debugfs_pf);
	pf->ice_debugfs_pf = NULL;
}

/**
 * ice_debugfs_init - create root directory for debugfs entries
 */
void ice_debugfs_init(void)
{
	ice_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
	if (IS_ERR(ice_debugfs_root))
		pr_info("init of debugfs failed\n");
}

/**
 * ice_debugfs_exit - remove debugfs entries
 */
void ice_debugfs_exit(void)
{
	debugfs_remove_recursive(ice_debugfs_root);
	ice_debugfs_root = NULL;
}