summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/qib/qib_debugfs.c
blob: 799a0c3bffc4a0e3bc10570e456630d1bea43f4f (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
#ifdef CONFIG_DEBUG_FS
/*
 * Copyright (c) 2013 Intel Corporation.  All rights reserved.
 *
 * 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 <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/kernel.h>
#include <linux/export.h>

#include "qib.h"
#include "qib_verbs.h"
#include "qib_debugfs.h"

static struct dentry *qib_dbg_root;

#define DEBUGFS_FILE(name) \
static const struct seq_operations _##name##_seq_ops = { \
	.start = _##name##_seq_start, \
	.next  = _##name##_seq_next, \
	.stop  = _##name##_seq_stop, \
	.show  = _##name##_seq_show \
}; \
static int _##name##_open(struct inode *inode, struct file *s) \
{ \
	struct seq_file *seq; \
	int ret; \
	ret =  seq_open(s, &_##name##_seq_ops); \
	if (ret) \
		return ret; \
	seq = s->private_data; \
	seq->private = inode->i_private; \
	return 0; \
} \
static const struct file_operations _##name##_file_ops = { \
	.owner   = THIS_MODULE, \
	.open    = _##name##_open, \
	.read    = seq_read, \
	.llseek  = seq_lseek, \
	.release = seq_release \
};

#define DEBUGFS_FILE_CREATE(name) \
do { \
	struct dentry *ent; \
	ent = debugfs_create_file(#name , 0400, ibd->qib_ibdev_dbg, \
		ibd, &_##name##_file_ops); \
	if (!ent) \
		pr_warn("create of " #name " failed\n"); \
} while (0)

static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
{
	struct qib_opcode_stats_perctx *opstats;

	if (*pos >= ARRAY_SIZE(opstats->stats))
		return NULL;
	return pos;
}

static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
	struct qib_opcode_stats_perctx *opstats;

	++*pos;
	if (*pos >= ARRAY_SIZE(opstats->stats))
		return NULL;
	return pos;
}


static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
{
	/* nothing allocated */
}

static int _opcode_stats_seq_show(struct seq_file *s, void *v)
{
	loff_t *spos = v;
	loff_t i = *spos, j;
	u64 n_packets = 0, n_bytes = 0;
	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
	struct qib_devdata *dd = dd_from_dev(ibd);

	for (j = 0; j < dd->first_user_ctxt; j++) {
		if (!dd->rcd[j])
			continue;
		n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
		n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
	}
	if (!n_packets && !n_bytes)
		return SEQ_SKIP;
	seq_printf(s, "%02llx %llu/%llu\n", i,
		(unsigned long long) n_packets,
		(unsigned long long) n_bytes);

	return 0;
}

DEBUGFS_FILE(opcode_stats)

static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
{
	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
	struct qib_devdata *dd = dd_from_dev(ibd);

	if (!*pos)
		return SEQ_START_TOKEN;
	if (*pos >= dd->first_user_ctxt)
		return NULL;
	return pos;
}

static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
	struct qib_devdata *dd = dd_from_dev(ibd);

	if (v == SEQ_START_TOKEN)
		return pos;

	++*pos;
	if (*pos >= dd->first_user_ctxt)
		return NULL;
	return pos;
}

static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
{
	/* nothing allocated */
}

static int _ctx_stats_seq_show(struct seq_file *s, void *v)
{
	loff_t *spos;
	loff_t i, j;
	u64 n_packets = 0;
	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
	struct qib_devdata *dd = dd_from_dev(ibd);

	if (v == SEQ_START_TOKEN) {
		seq_puts(s, "Ctx:npkts\n");
		return 0;
	}

	spos = v;
	i = *spos;

	if (!dd->rcd[i])
		return SEQ_SKIP;

	for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
		n_packets += dd->rcd[i]->opstats->stats[j].n_packets;

	if (!n_packets)
		return SEQ_SKIP;

	seq_printf(s, "  %llu:%llu\n", i, n_packets);
	return 0;
}

DEBUGFS_FILE(ctx_stats)

static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
{
	struct qib_qp_iter *iter;
	loff_t n = *pos;

	iter = qib_qp_iter_init(s->private);
	if (!iter)
		return NULL;

	while (n--) {
		if (qib_qp_iter_next(iter)) {
			kfree(iter);
			return NULL;
		}
	}

	return iter;
}

static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
				   loff_t *pos)
{
	struct qib_qp_iter *iter = iter_ptr;

	(*pos)++;

	if (qib_qp_iter_next(iter)) {
		kfree(iter);
		return NULL;
	}

	return iter;
}

static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
{
	/* nothing for now */
}

static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
{
	struct qib_qp_iter *iter = iter_ptr;

	if (!iter)
		return 0;

	qib_qp_iter_print(s, iter);

	return 0;
}

DEBUGFS_FILE(qp_stats)

void qib_dbg_ibdev_init(struct qib_ibdev *ibd)
{
	char name[10];

	snprintf(name, sizeof(name), "qib%d", dd_from_dev(ibd)->unit);
	ibd->qib_ibdev_dbg = debugfs_create_dir(name, qib_dbg_root);
	if (!ibd->qib_ibdev_dbg) {
		pr_warn("create of %s failed\n", name);
		return;
	}
	DEBUGFS_FILE_CREATE(opcode_stats);
	DEBUGFS_FILE_CREATE(ctx_stats);
	DEBUGFS_FILE_CREATE(qp_stats);
	return;
}

void qib_dbg_ibdev_exit(struct qib_ibdev *ibd)
{
	if (!qib_dbg_root)
		goto out;
	debugfs_remove_recursive(ibd->qib_ibdev_dbg);
out:
	ibd->qib_ibdev_dbg = NULL;
}

void qib_dbg_init(void)
{
	qib_dbg_root = debugfs_create_dir(QIB_DRV_NAME, NULL);
	if (!qib_dbg_root)
		pr_warn("init of debugfs failed\n");
}

void qib_dbg_exit(void)
{
	debugfs_remove_recursive(qib_dbg_root);
	qib_dbg_root = NULL;
}

#endif