/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#include <linux/slab.h>
 36
 37struct file_operations;
 38
 39#include <linux/debugfs.h>
 40
 41#include "ipoib.h"
 42
 43static struct dentry *ipoib_root;
 44
 45static void format_gid(union ib_gid *gid, char *buf)
 46{
 47	int i, n;
 48
 49	for (n = 0, i = 0; i < 8; ++i) {
 50		n += sprintf(buf + n, "%x",
 51			     be16_to_cpu(((__be16 *) gid->raw)[i]));
 52		if (i < 7)
 53			buf[n++] = ':';
 54	}
 55}
 56
 57static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
 58{
 59	struct ipoib_mcast_iter *iter;
 60	loff_t n = *pos;
 61
 62	iter = ipoib_mcast_iter_init(file->private);
 63	if (!iter)
 64		return NULL;
 65
 66	while (n--) {
 67		if (ipoib_mcast_iter_next(iter)) {
 68			kfree(iter);
 69			return NULL;
 70		}
 71	}
 72
 73	return iter;
 74}
 75
 76static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
 77				   loff_t *pos)
 78{
 79	struct ipoib_mcast_iter *iter = iter_ptr;
 80
 81	(*pos)++;
 82
 83	if (ipoib_mcast_iter_next(iter)) {
 84		kfree(iter);
 85		return NULL;
 86	}
 87
 88	return iter;
 89}
 90
 91static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
 92{
 93	/* nothing for now */
 94}
 95
 96static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
 97{
 98	struct ipoib_mcast_iter *iter = iter_ptr;
 99	char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
100	union ib_gid mgid;
101	unsigned long created;
102	unsigned int queuelen, complete, send_only;
103
104	if (!iter)
105		return 0;
106
107	ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
108			      &complete, &send_only);
109
110	format_gid(&mgid, gid_buf);
111
112	seq_printf(file,
113		   "GID: %s\n"
114		   "  created: %10ld\n"
115		   "  queuelen: %9d\n"
116		   "  complete: %9s\n"
117		   "  send_only: %8s\n"
118		   "\n",
119		   gid_buf, created, queuelen,
120		   complete ? "yes" : "no",
121		   send_only ? "yes" : "no");
122
123	return 0;
124}
125
126static const struct seq_operations ipoib_mcg_seq_ops = {
127	.start = ipoib_mcg_seq_start,
128	.next  = ipoib_mcg_seq_next,
129	.stop  = ipoib_mcg_seq_stop,
130	.show  = ipoib_mcg_seq_show,
131};
132
133static int ipoib_mcg_open(struct inode *inode, struct file *file)
134{
135	struct seq_file *seq;
136	int ret;
137
138	ret = seq_open(file, &ipoib_mcg_seq_ops);
139	if (ret)
140		return ret;
141
142	seq = file->private_data;
143	seq->private = inode->i_private;
144
145	return 0;
146}
147
148static const struct file_operations ipoib_mcg_fops = {
149	.owner   = THIS_MODULE,
150	.open    = ipoib_mcg_open,
151	.read    = seq_read,
152	.llseek  = seq_lseek,
153	.release = seq_release
154};
155
156static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
157{
158	struct ipoib_path_iter *iter;
159	loff_t n = *pos;
160
161	iter = ipoib_path_iter_init(file->private);
162	if (!iter)
163		return NULL;
164
165	while (n--) {
166		if (ipoib_path_iter_next(iter)) {
167			kfree(iter);
168			return NULL;
169		}
170	}
171
172	return iter;
173}
174
175static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
176				   loff_t *pos)
177{
178	struct ipoib_path_iter *iter = iter_ptr;
179
180	(*pos)++;
181
182	if (ipoib_path_iter_next(iter)) {
183		kfree(iter);
184		return NULL;
185	}
186
187	return iter;
188}
189
190static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
191{
192	/* nothing for now */
193}
194
195static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
196{
197	struct ipoib_path_iter *iter = iter_ptr;
198	char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
199	struct ipoib_path path;
200	int rate;
201
202	if (!iter)
203		return 0;
204
205	ipoib_path_iter_read(iter, &path);
206
207	format_gid(&path.pathrec.dgid, gid_buf);
208
209	seq_printf(file,
210		   "GID: %s\n"
211		   "  complete: %6s\n",
212		   gid_buf, path.pathrec.dlid ? "yes" : "no");
213
214	if (path.pathrec.dlid) {
215		rate = ib_rate_to_mult(path.pathrec.rate) * 25;
216
217		seq_printf(file,
218			   "  DLID:     0x%04x\n"
219			   "  SL: %12d\n"
220			   "  rate: %*d%s Gb/sec\n",
221			   be16_to_cpu(path.pathrec.dlid),
222			   path.pathrec.sl,
223			   10 - ((rate % 10) ? 2 : 0),
224			   rate / 10, rate % 10 ? ".5" : "");
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}