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#include <linux/slab.h>
36
37struct file_operations;
38
39#include <linux/debugfs.h>
40#include <linux/export.h>
41
42#include "ipoib.h"
43
44static struct dentry *ipoib_root;
45
46static 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
58static 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
77static 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
92static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
93{
94	/* nothing for now */
95}
96
97static 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
127static const 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
134static 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->i_private;
145
146	return 0;
147}
148
149static const 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
157static 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
176static 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
191static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
192{
193	/* nothing for now */
194}
195
196static 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_mbps(path.pathrec.rate);
217
218		seq_printf(file,
219			   "  DLID:     0x%04x\n"
220			   "  SL: %12d\n"
221			   "  rate: %8d.%d Gb/sec\n",
222			   be16_to_cpu(path.pathrec.dlid),
223			   path.pathrec.sl,
224			   rate / 1000, rate % 1000);
225	}
226
227	seq_putc(file, '\n');
228
229	return 0;
230}
231
232static const struct seq_operations ipoib_path_seq_ops = {
233	.start = ipoib_path_seq_start,
234	.next  = ipoib_path_seq_next,
235	.stop  = ipoib_path_seq_stop,
236	.show  = ipoib_path_seq_show,
237};
238
239static int ipoib_path_open(struct inode *inode, struct file *file)
240{
241	struct seq_file *seq;
242	int ret;
243
244	ret = seq_open(file, &ipoib_path_seq_ops);
245	if (ret)
246		return ret;
247
248	seq = file->private_data;
249	seq->private = inode->i_private;
250
251	return 0;
252}
253
254static const struct file_operations ipoib_path_fops = {
255	.owner   = THIS_MODULE,
256	.open    = ipoib_path_open,
257	.read    = seq_read,
258	.llseek  = seq_lseek,
259	.release = seq_release
260};
261
262void ipoib_create_debug_files(struct net_device *dev)
263{
264	struct ipoib_dev_priv *priv = netdev_priv(dev);
265	char name[IFNAMSIZ + sizeof "_path"];
266
267	snprintf(name, sizeof name, "%s_mcg", dev->name);
268	priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
269					       ipoib_root, dev, &ipoib_mcg_fops);
270	if (!priv->mcg_dentry)
271		ipoib_warn(priv, "failed to create mcg debug file\n");
272
273	snprintf(name, sizeof name, "%s_path", dev->name);
274	priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
275						ipoib_root, dev, &ipoib_path_fops);
276	if (!priv->path_dentry)
277		ipoib_warn(priv, "failed to create path debug file\n");
278}
279
280void ipoib_delete_debug_files(struct net_device *dev)
281{
282	struct ipoib_dev_priv *priv = netdev_priv(dev);
283
284	if (priv->mcg_dentry)
285		debugfs_remove(priv->mcg_dentry);
286	if (priv->path_dentry)
287		debugfs_remove(priv->path_dentry);
288}
289
290int ipoib_register_debugfs(void)
291{
292	ipoib_root = debugfs_create_dir("ipoib", NULL);
293	return ipoib_root ? 0 : -ENOMEM;
294}
295
296void ipoib_unregister_debugfs(void)
297{
298	debugfs_remove(ipoib_root);
299}
300