1 /*
2 * Copyright (c) 2013 - 2017 Intel Corporation. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include <linux/debugfs.h>
33 #include <linux/seq_file.h>
34 #include <linux/kernel.h>
35 #include <linux/export.h>
36
37 #include "qib.h"
38 #include "qib_verbs.h"
39 #include "qib_debugfs.h"
40
41 static struct dentry *qib_dbg_root;
42
43 #define DEBUGFS_FILE(name) \
44 static const struct seq_operations _##name##_seq_ops = { \
45 .start = _##name##_seq_start, \
46 .next = _##name##_seq_next, \
47 .stop = _##name##_seq_stop, \
48 .show = _##name##_seq_show \
49 }; \
50 static int _##name##_open(struct inode *inode, struct file *s) \
51 { \
52 struct seq_file *seq; \
53 int ret; \
54 ret = seq_open(s, &_##name##_seq_ops); \
55 if (ret) \
56 return ret; \
57 seq = s->private_data; \
58 seq->private = inode->i_private; \
59 return 0; \
60 } \
61 static const struct file_operations _##name##_file_ops = { \
62 .owner = THIS_MODULE, \
63 .open = _##name##_open, \
64 .read = seq_read, \
65 .llseek = seq_lseek, \
66 .release = seq_release \
67 };
68
_opcode_stats_seq_start(struct seq_file * s,loff_t * pos)69 static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
70 {
71 struct qib_opcode_stats_perctx *opstats;
72
73 if (*pos >= ARRAY_SIZE(opstats->stats))
74 return NULL;
75 return pos;
76 }
77
_opcode_stats_seq_next(struct seq_file * s,void * v,loff_t * pos)78 static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
79 {
80 struct qib_opcode_stats_perctx *opstats;
81
82 ++*pos;
83 if (*pos >= ARRAY_SIZE(opstats->stats))
84 return NULL;
85 return pos;
86 }
87
88
_opcode_stats_seq_stop(struct seq_file * s,void * v)89 static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
90 {
91 /* nothing allocated */
92 }
93
_opcode_stats_seq_show(struct seq_file * s,void * v)94 static int _opcode_stats_seq_show(struct seq_file *s, void *v)
95 {
96 loff_t *spos = v;
97 loff_t i = *spos, j;
98 u64 n_packets = 0, n_bytes = 0;
99 struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
100 struct qib_devdata *dd = dd_from_dev(ibd);
101
102 for (j = 0; j < dd->first_user_ctxt; j++) {
103 if (!dd->rcd[j])
104 continue;
105 n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
106 n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
107 }
108 if (!n_packets && !n_bytes)
109 return SEQ_SKIP;
110 seq_printf(s, "%02llx %llu/%llu\n", i,
111 (unsigned long long) n_packets,
112 (unsigned long long) n_bytes);
113
114 return 0;
115 }
116
DEBUGFS_FILE(opcode_stats)117 DEBUGFS_FILE(opcode_stats)
118
119 static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
120 {
121 struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
122 struct qib_devdata *dd = dd_from_dev(ibd);
123
124 if (!*pos)
125 return SEQ_START_TOKEN;
126 if (*pos >= dd->first_user_ctxt)
127 return NULL;
128 return pos;
129 }
130
_ctx_stats_seq_next(struct seq_file * s,void * v,loff_t * pos)131 static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
132 {
133 struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
134 struct qib_devdata *dd = dd_from_dev(ibd);
135
136 if (v == SEQ_START_TOKEN)
137 return pos;
138
139 ++*pos;
140 if (*pos >= dd->first_user_ctxt)
141 return NULL;
142 return pos;
143 }
144
_ctx_stats_seq_stop(struct seq_file * s,void * v)145 static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
146 {
147 /* nothing allocated */
148 }
149
_ctx_stats_seq_show(struct seq_file * s,void * v)150 static int _ctx_stats_seq_show(struct seq_file *s, void *v)
151 {
152 loff_t *spos;
153 loff_t i, j;
154 u64 n_packets = 0;
155 struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
156 struct qib_devdata *dd = dd_from_dev(ibd);
157
158 if (v == SEQ_START_TOKEN) {
159 seq_puts(s, "Ctx:npkts\n");
160 return 0;
161 }
162
163 spos = v;
164 i = *spos;
165
166 if (!dd->rcd[i])
167 return SEQ_SKIP;
168
169 for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
170 n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
171
172 if (!n_packets)
173 return SEQ_SKIP;
174
175 seq_printf(s, " %llu:%llu\n", i, n_packets);
176 return 0;
177 }
178
DEBUGFS_FILE(ctx_stats)179 DEBUGFS_FILE(ctx_stats)
180
181 static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
182 __acquires(RCU)
183 {
184 struct rvt_qp_iter *iter;
185 loff_t n = *pos;
186
187 iter = rvt_qp_iter_init(s->private, 0, NULL);
188
189 /* stop calls rcu_read_unlock */
190 rcu_read_lock();
191
192 if (!iter)
193 return NULL;
194
195 do {
196 if (rvt_qp_iter_next(iter)) {
197 kfree(iter);
198 return NULL;
199 }
200 } while (n--);
201
202 return iter;
203 }
204
_qp_stats_seq_next(struct seq_file * s,void * iter_ptr,loff_t * pos)205 static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
206 loff_t *pos)
207 __must_hold(RCU)
208 {
209 struct rvt_qp_iter *iter = iter_ptr;
210
211 (*pos)++;
212
213 if (rvt_qp_iter_next(iter)) {
214 kfree(iter);
215 return NULL;
216 }
217
218 return iter;
219 }
220
_qp_stats_seq_stop(struct seq_file * s,void * iter_ptr)221 static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
222 __releases(RCU)
223 {
224 rcu_read_unlock();
225 }
226
_qp_stats_seq_show(struct seq_file * s,void * iter_ptr)227 static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
228 {
229 struct rvt_qp_iter *iter = iter_ptr;
230
231 if (!iter)
232 return 0;
233
234 qib_qp_iter_print(s, iter);
235
236 return 0;
237 }
238
DEBUGFS_FILE(qp_stats)239 DEBUGFS_FILE(qp_stats)
240
241 void qib_dbg_ibdev_init(struct qib_ibdev *ibd)
242 {
243 struct dentry *root;
244 char name[10];
245
246 snprintf(name, sizeof(name), "qib%d", dd_from_dev(ibd)->unit);
247 root = debugfs_create_dir(name, qib_dbg_root);
248 ibd->qib_ibdev_dbg = root;
249
250 debugfs_create_file("opcode_stats", 0400, root, ibd,
251 &_opcode_stats_file_ops);
252 debugfs_create_file("ctx_stats", 0400, root, ibd, &_ctx_stats_file_ops);
253 debugfs_create_file("qp_stats", 0400, root, ibd, &_qp_stats_file_ops);
254 }
255
qib_dbg_ibdev_exit(struct qib_ibdev * ibd)256 void qib_dbg_ibdev_exit(struct qib_ibdev *ibd)
257 {
258 if (!qib_dbg_root)
259 goto out;
260 debugfs_remove_recursive(ibd->qib_ibdev_dbg);
261 out:
262 ibd->qib_ibdev_dbg = NULL;
263 }
264
qib_dbg_init(void)265 void qib_dbg_init(void)
266 {
267 qib_dbg_root = debugfs_create_dir(QIB_DRV_NAME, NULL);
268 }
269
qib_dbg_exit(void)270 void qib_dbg_exit(void)
271 {
272 debugfs_remove_recursive(qib_dbg_root);
273 qib_dbg_root = NULL;
274 }
275