Merge branch 'master'
[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  * $Id: ipoib_fs.c 1389 2004-12-27 22:56:47Z roland $
33  */
34
35 #include <linux/err.h>
36 #include <linux/seq_file.h>
37
38 struct file_operations;
39
40 #include <linux/debugfs.h>
41
42 #include "ipoib.h"
43
44 static struct dentry *ipoib_root;
45
46 static void format_gid(union ib_gid *gid, char *buf)
47 {
48         int i, n;
49
50         for (n = 0, i = 0; i < 8; ++i) {
51                 n += sprintf(buf + n, "%x",
52                              be16_to_cpu(((__be16 *) gid->raw)[i]));
53                 if (i < 7)
54                         buf[n++] = ':';
55         }
56 }
57
58 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
59 {
60         struct ipoib_mcast_iter *iter;
61         loff_t n = *pos;
62
63         iter = ipoib_mcast_iter_init(file->private);
64         if (!iter)
65                 return NULL;
66
67         while (n--) {
68                 if (ipoib_mcast_iter_next(iter)) {
69                         kfree(iter);
70                         return NULL;
71                 }
72         }
73
74         return iter;
75 }
76
77 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
78                                    loff_t *pos)
79 {
80         struct ipoib_mcast_iter *iter = iter_ptr;
81
82         (*pos)++;
83
84         if (ipoib_mcast_iter_next(iter)) {
85                 kfree(iter);
86                 return NULL;
87         }
88
89         return iter;
90 }
91
92 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
93 {
94         /* nothing for now */
95 }
96
97 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
98 {
99         struct ipoib_mcast_iter *iter = iter_ptr;
100         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
101         union ib_gid mgid;
102         unsigned long created;
103         unsigned int queuelen, complete, send_only;
104
105         if (!iter)
106                 return 0;
107
108         ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
109                               &complete, &send_only);
110
111         format_gid(&mgid, gid_buf);
112
113         seq_printf(file,
114                    "GID: %s\n"
115                    "  created: %10ld\n"
116                    "  queuelen: %9d\n"
117                    "  complete: %9s\n"
118                    "  send_only: %8s\n"
119                    "\n",
120                    gid_buf, created, queuelen,
121                    complete ? "yes" : "no",
122                    send_only ? "yes" : "no");
123
124         return 0;
125 }
126
127 static struct seq_operations ipoib_mcg_seq_ops = {
128         .start = ipoib_mcg_seq_start,
129         .next  = ipoib_mcg_seq_next,
130         .stop  = ipoib_mcg_seq_stop,
131         .show  = ipoib_mcg_seq_show,
132 };
133
134 static int ipoib_mcg_open(struct inode *inode, struct file *file)
135 {
136         struct seq_file *seq;
137         int ret;
138
139         ret = seq_open(file, &ipoib_mcg_seq_ops);
140         if (ret)
141                 return ret;
142
143         seq = file->private_data;
144         seq->private = inode->u.generic_ip;
145
146         return 0;
147 }
148
149 static struct file_operations ipoib_mcg_fops = {
150         .owner   = THIS_MODULE,
151         .open    = ipoib_mcg_open,
152         .read    = seq_read,
153         .llseek  = seq_lseek,
154         .release = seq_release
155 };
156
157 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
158 {
159         struct ipoib_path_iter *iter;
160         loff_t n = *pos;
161
162         iter = ipoib_path_iter_init(file->private);
163         if (!iter)
164                 return NULL;
165
166         while (n--) {
167                 if (ipoib_path_iter_next(iter)) {
168                         kfree(iter);
169                         return NULL;
170                 }
171         }
172
173         return iter;
174 }
175
176 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
177                                    loff_t *pos)
178 {
179         struct ipoib_path_iter *iter = iter_ptr;
180
181         (*pos)++;
182
183         if (ipoib_path_iter_next(iter)) {
184                 kfree(iter);
185                 return NULL;
186         }
187
188         return iter;
189 }
190
191 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
192 {
193         /* nothing for now */
194 }
195
196 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
197 {
198         struct ipoib_path_iter *iter = iter_ptr;
199         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
200         struct ipoib_path path;
201         int rate;
202
203         if (!iter)
204                 return 0;
205
206         ipoib_path_iter_read(iter, &path);
207
208         format_gid(&path.pathrec.dgid, gid_buf);
209
210         seq_printf(file,
211                    "GID: %s\n"
212                    "  complete: %6s\n",
213                    gid_buf, path.pathrec.dlid ? "yes" : "no");
214
215         if (path.pathrec.dlid) {
216                 rate = ib_rate_to_mult(path.pathrec.rate) * 25;
217
218                 seq_printf(file,
219                            "  DLID:     0x%04x\n"
220                            "  SL: %12d\n"
221                            "  rate: %*d%s Gb/sec\n",
222                            be16_to_cpu(path.pathrec.dlid),
223                            path.pathrec.sl,
224                            10 - ((rate % 10) ? 2 : 0),
225                            rate / 10, rate % 10 ? ".5" : "");
226         }
227
228         seq_putc(file, '\n');
229
230         return 0;
231 }
232
233 static struct seq_operations ipoib_path_seq_ops = {
234         .start = ipoib_path_seq_start,
235         .next  = ipoib_path_seq_next,
236         .stop  = ipoib_path_seq_stop,
237         .show  = ipoib_path_seq_show,
238 };
239
240 static int ipoib_path_open(struct inode *inode, struct file *file)
241 {
242         struct seq_file *seq;
243         int ret;
244
245         ret = seq_open(file, &ipoib_path_seq_ops);
246         if (ret)
247                 return ret;
248
249         seq = file->private_data;
250         seq->private = inode->u.generic_ip;
251
252         return 0;
253 }
254
255 static struct file_operations ipoib_path_fops = {
256         .owner   = THIS_MODULE,
257         .open    = ipoib_path_open,
258         .read    = seq_read,
259         .llseek  = seq_lseek,
260         .release = seq_release
261 };
262
263 void ipoib_create_debug_files(struct net_device *dev)
264 {
265         struct ipoib_dev_priv *priv = netdev_priv(dev);
266         char name[IFNAMSIZ + sizeof "_path"];
267
268         snprintf(name, sizeof name, "%s_mcg", dev->name);
269         priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
270                                                ipoib_root, dev, &ipoib_mcg_fops);
271         if (!priv->mcg_dentry)
272                 ipoib_warn(priv, "failed to create mcg debug file\n");
273
274         snprintf(name, sizeof name, "%s_path", dev->name);
275         priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
276                                                 ipoib_root, dev, &ipoib_path_fops);
277         if (!priv->path_dentry)
278                 ipoib_warn(priv, "failed to create path debug file\n");
279 }
280
281 void ipoib_delete_debug_files(struct net_device *dev)
282 {
283         struct ipoib_dev_priv *priv = netdev_priv(dev);
284
285         if (priv->mcg_dentry)
286                 debugfs_remove(priv->mcg_dentry);
287         if (priv->path_dentry)
288                 debugfs_remove(priv->path_dentry);
289 }
290
291 int ipoib_register_debugfs(void)
292 {
293         ipoib_root = debugfs_create_dir("ipoib", NULL);
294         return ipoib_root ? 0 : -ENOMEM;
295 }
296
297 void ipoib_unregister_debugfs(void)
298 {
299         debugfs_remove(ipoib_root);
300 }