1/*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004 Topspin Communications.  All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses.  You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 *     Redistribution and use in source and binary forms, with or
13 *     without modification, are permitted provided that the following
14 *     conditions are met:
15 *
16 *      - Redistributions of source code must retain the above
17 *        copyright notice, this list of conditions and the following
18 *        disclaimer.
19 *
20 *      - Redistributions in binary form must reproduce the above
21 *        copyright notice, this list of conditions and the following
22 *        disclaimer in the documentation and/or other materials
23 *        provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#include <linux/err.h>
39#include <linux/seq_file.h>
40
41struct file_operations;
42
43#include <linux/debugfs.h>
44
45#include "ipoib.h"
46
47static struct dentry *ipoib_root;
48
49static void format_gid(union ib_gid *gid, char *buf)
50{
51	int i, n;
52
53	for (n = 0, i = 0; i < 8; ++i) {
54		n += sprintf(buf + n, "%x",
55			     be16_to_cpu(((__be16 *) gid->raw)[i]));
56		if (i < 7)
57			buf[n++] = ':';
58	}
59}
60
61static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
62{
63	struct ipoib_mcast_iter *iter;
64	loff_t n = *pos;
65
66	iter = ipoib_mcast_iter_init(file->private);
67	if (!iter)
68		return NULL;
69
70	while (n--) {
71		if (ipoib_mcast_iter_next(iter)) {
72			kfree(iter);
73			return NULL;
74		}
75	}
76
77	return iter;
78}
79
80static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
81				   loff_t *pos)
82{
83	struct ipoib_mcast_iter *iter = iter_ptr;
84
85	(*pos)++;
86
87	if (ipoib_mcast_iter_next(iter)) {
88		kfree(iter);
89		return NULL;
90	}
91
92	return iter;
93}
94
95static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
96{
97	/* nothing for now */
98}
99
100static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
101{
102	struct ipoib_mcast_iter *iter = iter_ptr;
103	char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
104	union ib_gid mgid;
105	unsigned long created;
106	unsigned int queuelen, complete, send_only;
107
108	if (!iter)
109		return 0;
110
111	ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
112			      &complete, &send_only);
113
114	format_gid(&mgid, gid_buf);
115
116	seq_printf(file,
117		   "GID: %s\n"
118		   "  created: %10ld\n"
119		   "  queuelen: %9d\n"
120		   "  complete: %9s\n"
121		   "  send_only: %8s\n"
122		   "\n",
123		   gid_buf, created, queuelen,
124		   complete ? "yes" : "no",
125		   send_only ? "yes" : "no");
126
127	return 0;
128}
129
130static const struct seq_operations ipoib_mcg_seq_ops = {
131	.start = ipoib_mcg_seq_start,
132	.next  = ipoib_mcg_seq_next,
133	.stop  = ipoib_mcg_seq_stop,
134	.show  = ipoib_mcg_seq_show,
135};
136
137static int ipoib_mcg_open(struct inode *inode, struct file *file)
138{
139	struct seq_file *seq;
140	int ret;
141
142	ret = seq_open(file, &ipoib_mcg_seq_ops);
143	if (ret)
144		return ret;
145
146	seq = file->private_data;
147	seq->private = inode->i_private;
148
149	return 0;
150}
151
152static const struct file_operations ipoib_mcg_fops = {
153	.owner   = THIS_MODULE,
154	.open    = ipoib_mcg_open,
155	.read    = seq_read,
156	.llseek  = seq_lseek,
157	.release = seq_release
158};
159
160static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
161{
162	struct ipoib_path_iter *iter;
163	loff_t n = *pos;
164
165	iter = ipoib_path_iter_init(file->private);
166	if (!iter)
167		return NULL;
168
169	while (n--) {
170		if (ipoib_path_iter_next(iter)) {
171			kfree(iter);
172			return NULL;
173		}
174	}
175
176	return iter;
177}
178
179static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
180				   loff_t *pos)
181{
182	struct ipoib_path_iter *iter = iter_ptr;
183
184	(*pos)++;
185
186	if (ipoib_path_iter_next(iter)) {
187		kfree(iter);
188		return NULL;
189	}
190
191	return iter;
192}
193
194static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
195{
196	/* nothing for now */
197}
198
199static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
200{
201	struct ipoib_path_iter *iter = iter_ptr;
202	char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
203	struct ipoib_path path;
204	int rate;
205
206	if (!iter)
207		return 0;
208
209	ipoib_path_iter_read(iter, &path);
210
211	format_gid(&path.pathrec.dgid, gid_buf);
212
213	seq_printf(file,
214		   "GID: %s\n"
215		   "  complete: %6s\n",
216		   gid_buf, path.pathrec.dlid ? "yes" : "no");
217
218	if (path.pathrec.dlid) {
219		rate = ib_rate_to_mult(path.pathrec.rate) * 25;
220
221		seq_printf(file,
222			   "  DLID:     0x%04x\n"
223			   "  SL: %12d\n"
224			   "  rate: %*d%s Gb/sec\n",
225			   be16_to_cpu(path.pathrec.dlid),
226			   path.pathrec.sl,
227			   10 - ((rate % 10) ? 2 : 0),
228			   rate / 10, rate % 10 ? ".5" : "");
229	}
230
231	seq_putc(file, '\n');
232
233	return 0;
234}
235
236static const struct seq_operations ipoib_path_seq_ops = {
237	.start = ipoib_path_seq_start,
238	.next  = ipoib_path_seq_next,
239	.stop  = ipoib_path_seq_stop,
240	.show  = ipoib_path_seq_show,
241};
242
243static int ipoib_path_open(struct inode *inode, struct file *file)
244{
245	struct seq_file *seq;
246	int ret;
247
248	ret = seq_open(file, &ipoib_path_seq_ops);
249	if (ret)
250		return ret;
251
252	seq = file->private_data;
253	seq->private = inode->i_private;
254
255	return 0;
256}
257
258static const struct file_operations ipoib_path_fops = {
259	.owner   = THIS_MODULE,
260	.open    = ipoib_path_open,
261	.read    = seq_read,
262	.llseek  = seq_lseek,
263	.release = seq_release
264};
265
266void ipoib_create_debug_files(struct ifnet *dev)
267{
268	struct ipoib_dev_priv *priv = dev->if_softc;
269	char name[IFNAMSIZ + sizeof "_path"];
270
271	snprintf(name, sizeof name, "%s_mcg", if_name(dev));
272	priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
273					       ipoib_root, dev, &ipoib_mcg_fops);
274	if (!priv->mcg_dentry)
275		ipoib_warn(priv, "failed to create mcg debug file\n");
276
277	snprintf(name, sizeof name, "%s_path", if_name(dev));
278	priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
279						ipoib_root, dev, &ipoib_path_fops);
280	if (!priv->path_dentry)
281		ipoib_warn(priv, "failed to create path debug file\n");
282}
283
284void ipoib_delete_debug_files(struct ifnet *dev)
285{
286	struct ipoib_dev_priv *priv = dev->if_softc;
287
288	if (priv->mcg_dentry)
289		debugfs_remove(priv->mcg_dentry);
290	if (priv->path_dentry)
291		debugfs_remove(priv->path_dentry);
292}
293
294int ipoib_register_debugfs(void)
295{
296	ipoib_root = debugfs_create_dir("ipoib", NULL);
297	return ipoib_root ? 0 : -ENOMEM;
298}
299
300void ipoib_unregister_debugfs(void)
301{
302	debugfs_remove(ipoib_root);
303}
304