1 /*
2 * Copyright (c) 2004 Topspin Communications. 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
33 #include <linux/err.h>
34 #include <linux/seq_file.h>
35
36 struct file_operations;
37
38 #include <linux/debugfs.h>
39
40 #include "ipoib.h"
41
42 static struct dentry *ipoib_root;
43
44 static void format_gid(union ib_gid *gid, char *buf)
45 {
46 int i, n;
47
48 for (n = 0, i = 0; i < 8; ++i) {
49 n += sprintf(buf + n, "%x",
50 be16_to_cpu(((__be16 *) gid->raw)[i]));
51 if (i < 7)
52 buf[n++] = ':';
53 }
54 }
55
56 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
57 {
58 struct ipoib_mcast_iter *iter;
59 loff_t n = *pos;
60
61 iter = ipoib_mcast_iter_init(file->private);
62 if (!iter)
63 return NULL;
64
65 while (n--) {
66 if (ipoib_mcast_iter_next(iter)) {
67 kfree(iter);
68 return NULL;
69 }
70 }
71
72 return iter;
73 }
74
75 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
76 loff_t *pos)
77 {
78 struct ipoib_mcast_iter *iter = iter_ptr;
79
80 (*pos)++;
81
82 if (ipoib_mcast_iter_next(iter)) {
83 kfree(iter);
84 return NULL;
85 }
86
87 return iter;
88 }
89
90 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
91 {
92 /* nothing for now */
93 }
94
95 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
96 {
97 struct ipoib_mcast_iter *iter = iter_ptr;
98 char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
99 union ib_gid mgid;
100 unsigned long created;
101 unsigned int queuelen, complete, send_only;
102
103 if (!iter)
104 return 0;
105
106 ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
107 &complete, &send_only);
108
109 format_gid(&mgid, gid_buf);
110
111 seq_printf(file,
112 "GID: %s\n"
113 " created: %10ld\n"
114 " queuelen: %9d\n"
115 " complete: %9s\n"
116 " send_only: %8s\n"
117 "\n",
118 gid_buf, created, queuelen,
119 complete ? "yes" : "no",
120 send_only ? "yes" : "no");
121
122 return 0;
123 }
124
125 static const struct seq_operations ipoib_mcg_seq_ops = {
126 .start = ipoib_mcg_seq_start,
127 .next = ipoib_mcg_seq_next,
128 .stop = ipoib_mcg_seq_stop,
129 .show = ipoib_mcg_seq_show,
130 };
131
132 static int ipoib_mcg_open(struct inode *inode, struct file *file)
133 {
134 struct seq_file *seq;
135 int ret;
136
137 ret = seq_open(file, &ipoib_mcg_seq_ops);
138 if (ret)
139 return ret;
140
141 seq = file->private_data;
142 seq->private = inode->i_private;
143
144 return 0;
145 }
146
147 static const struct file_operations ipoib_mcg_fops = {
148 .owner = THIS_MODULE,
149 .open = ipoib_mcg_open,
150 .read = seq_read,
151 .llseek = seq_lseek,
152 .release = seq_release
153 };
154
155 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
156 {
157 struct ipoib_path_iter *iter;
158 loff_t n = *pos;
159
160 iter = ipoib_path_iter_init(file->private);
161 if (!iter)
162 return NULL;
163
164 while (n--) {
165 if (ipoib_path_iter_next(iter)) {
166 kfree(iter);
167 return NULL;
168 }
169 }
170
171 return iter;
172 }
173
174 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
175 loff_t *pos)
176 {
177 struct ipoib_path_iter *iter = iter_ptr;
178
179 (*pos)++;
180
181 if (ipoib_path_iter_next(iter)) {
182 kfree(iter);
183 return NULL;
184 }
185
186 return iter;
187 }
188
189 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
190 {
191 /* nothing for now */
192 }
193
194 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
195 {
196 struct ipoib_path_iter *iter = iter_ptr;
197 char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
198 struct ipoib_path path;
199 int rate;
200
201 if (!iter)
202 return 0;
203
204 ipoib_path_iter_read(iter, &path);
205
206 format_gid(&path.pathrec.dgid, gid_buf);
207
208 seq_printf(file,
209 "GID: %s\n"
210 " complete: %6s\n",
211 gid_buf, path.pathrec.dlid ? "yes" : "no");
212
213 if (path.pathrec.dlid) {
214 rate = ib_rate_to_mult(path.pathrec.rate) * 25;
215
216 seq_printf(file,
217 " DLID: 0x%04x\n"
218 " SL: %12d\n"
219 " rate: %*d%s Gb/sec\n",
220 be16_to_cpu(path.pathrec.dlid),
221 path.pathrec.sl,
222 10 - ((rate % 10) ? 2 : 0),
223 rate / 10, rate % 10 ? ".5" : "");
224 }
225
226 seq_putc(file, '\n');
227
228 return 0;
229 }
230
231 static const struct seq_operations ipoib_path_seq_ops = {
232 .start = ipoib_path_seq_start,
233 .next = ipoib_path_seq_next,
234 .stop = ipoib_path_seq_stop,
235 .show = ipoib_path_seq_show,
236 };
237
238 static int ipoib_path_open(struct inode *inode, struct file *file)
239 {
240 struct seq_file *seq;
241 int ret;
242
243 ret = seq_open(file, &ipoib_path_seq_ops);
244 if (ret)
245 return ret;
246
247 seq = file->private_data;
248 seq->private = inode->i_private;
249
250 return 0;
251 }
252
253 static const struct file_operations ipoib_path_fops = {
254 .owner = THIS_MODULE,
255 .open = ipoib_path_open,
256 .read = seq_read,
257 .llseek = seq_lseek,
258 .release = seq_release
259 };
260
261 void ipoib_create_debug_files(struct net_device *dev)
262 {
263 struct ipoib_dev_priv *priv = netdev_priv(dev);
264 char name[IFNAMSIZ + sizeof "_path"];
265
266 snprintf(name, sizeof name, "%s_mcg", dev->name);
267 priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
268 ipoib_root, dev, &ipoib_mcg_fops);
269 if (!priv->mcg_dentry)
270 ipoib_warn(priv, "failed to create mcg debug file\n");
271
272 snprintf(name, sizeof name, "%s_path", dev->name);
273 priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
274 ipoib_root, dev, &ipoib_path_fops);
275 if (!priv->path_dentry)
276 ipoib_warn(priv, "failed to create path debug file\n");
277 }
278
279 void ipoib_delete_debug_files(struct net_device *dev)
280 {
281 struct ipoib_dev_priv *priv = netdev_priv(dev);
282
283 if (priv->mcg_dentry)
284 debugfs_remove(priv->mcg_dentry);
285 if (priv->path_dentry)
286 debugfs_remove(priv->path_dentry);
287 }
288
289 int ipoib_register_debugfs(void)
290 {
291 ipoib_root = debugfs_create_dir("ipoib", NULL);
292 return ipoib_root ? 0 : -ENOMEM;
293 }
294
295 void ipoib_unregister_debugfs(void)
296 {
297 debugfs_remove(ipoib_root);
298 }
299
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