Merge branch 'linus' into core/softlockup
[linux-2.6] / drivers / infiniband / ulp / ipoib / ipoib_fs.c
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 }