ulp/ipoib/ipoib_fs.c

0001 /*
0002  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
0003  *
0004  * This software is available to you under a choice of one of two
0005  * licenses.  You may choose to be licensed under the terms of the GNU
0006  * General Public License (GPL) Version 2, available from the file
0007  * COPYING in the main directory of this source tree, or the
0008  * OpenIB.org BSD license below:
0009  *
0010  *     Redistribution and use in source and binary forms, with or
0011  *     without modification, are permitted provided that the following
0012  *     conditions are met:
0013  *
0014  *      - Redistributions of source code must retain the above
0015  *        copyright notice, this list of conditions and the following
0016  *        disclaimer.
0017  *
0018  *      - Redistributions in binary form must reproduce the above
0019  *        copyright notice, this list of conditions and the following
0020  *        disclaimer in the documentation and/or other materials
0021  *        provided with the distribution.
0022  *
0023  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
0024  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
0025  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
0026  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
0027  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
0028  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0029  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
0030  * SOFTWARE.
0031  */
0032
0033 #include <linux/err.h>
0034 #include <linux/seq_file.h>
0035 #include <linux/slab.h>
0036
0037 struct file_operations;
0038
0039 #include <linux/debugfs.h>
0040 #include <linux/export.h>
0041
0042 #include "ipoib.h"
0043
0044 static struct dentry *ipoib_root;
0045
0046 static void format_gid(union ib_gid *gid, char *buf)
0047 {
0048     int i, n;
0049
0050     for (n = 0, i = 0; i < 8; ++i) {
0051         n += sprintf(buf + n, "%x",
0052                  be16_to_cpu(((__be16 *) gid->raw)[i]));
0053         if (i < 7)
0054             buf[n++] = ':';
0055     }
0056 }
0057
0058 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
0059 {
0060     struct ipoib_mcast_iter *iter;
0061     loff_t n = *pos;
0062
0063     iter = ipoib_mcast_iter_init(file->private);
0064     if (!iter)
0065         return NULL;
0066
0067     while (n--) {
0068         if (ipoib_mcast_iter_next(iter)) {
0069             kfree(iter);
0070             return NULL;
0071         }
0072     }
0073
0074     return iter;
0075 }
0076
0077 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
0078                    loff_t *pos)
0079 {
0080     struct ipoib_mcast_iter *iter = iter_ptr;
0081
0082     (*pos)++;
0083
0084     if (ipoib_mcast_iter_next(iter)) {
0085         kfree(iter);
0086         return NULL;
0087     }
0088
0089     return iter;
0090 }
0091
0092 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
0093 {
0094     /* nothing for now */
0095 }
0096
0097 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
0098 {
0099     struct ipoib_mcast_iter *iter = iter_ptr;
0100     char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
0101     union ib_gid mgid;
0102     unsigned long created;
0103     unsigned int queuelen, complete, send_only;
0104
0105     if (!iter)
0106         return 0;
0107
0108     ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
0109                   &complete, &send_only);
0110
0111     format_gid(&mgid, gid_buf);
0112
0113     seq_printf(file,
0114            "GID: %s\n"
0115            "  created: %10ld\n"
0116            "  queuelen: %9d\n"
0117            "  complete: %9s\n"
0118            "  send_only: %8s\n"
0119            "\n",
0120            gid_buf, created, queuelen,
0121            complete ? "yes" : "no",
0122            send_only ? "yes" : "no");
0123
0124     return 0;
0125 }
0126
0127 static const struct seq_operations ipoib_mcg_sops = {
0128     .start = ipoib_mcg_seq_start,
0129     .next  = ipoib_mcg_seq_next,
0130     .stop  = ipoib_mcg_seq_stop,
0131     .show  = ipoib_mcg_seq_show,
0132 };
0133
0134 DEFINE_SEQ_ATTRIBUTE(ipoib_mcg);
0135
0136 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
0137 {
0138     struct ipoib_path_iter *iter;
0139     loff_t n = *pos;
0140
0141     iter = ipoib_path_iter_init(file->private);
0142     if (!iter)
0143         return NULL;
0144
0145     while (n--) {
0146         if (ipoib_path_iter_next(iter)) {
0147             kfree(iter);
0148             return NULL;
0149         }
0150     }
0151
0152     return iter;
0153 }
0154
0155 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
0156                    loff_t *pos)
0157 {
0158     struct ipoib_path_iter *iter = iter_ptr;
0159
0160     (*pos)++;
0161
0162     if (ipoib_path_iter_next(iter)) {
0163         kfree(iter);
0164         return NULL;
0165     }
0166
0167     return iter;
0168 }
0169
0170 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
0171 {
0172     /* nothing for now */
0173 }
0174
0175 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
0176 {
0177     struct ipoib_path_iter *iter = iter_ptr;
0178     char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
0179     struct ipoib_path path;
0180     int rate;
0181
0182     if (!iter)
0183         return 0;
0184
0185     ipoib_path_iter_read(iter, &path);
0186
0187     format_gid(&path.pathrec.dgid, gid_buf);
0188
0189     seq_printf(file,
0190            "GID: %s\n"
0191            "  complete: %6s\n",
0192            gid_buf, sa_path_get_dlid(&path.pathrec) ? "yes" : "no");
0193
0194     if (sa_path_get_dlid(&path.pathrec)) {
0195         rate = ib_rate_to_mbps(path.pathrec.rate);
0196
0197         seq_printf(file,
0198                "  DLID:     0x%04x\n"
0199                "  SL: %12d\n"
0200                "  rate: %8d.%d Gb/sec\n",
0201                be32_to_cpu(sa_path_get_dlid(&path.pathrec)),
0202                path.pathrec.sl,
0203                rate / 1000, rate % 1000);
0204     }
0205
0206     seq_putc(file, '\n');
0207
0208     return 0;
0209 }
0210
0211 static const struct seq_operations ipoib_path_sops = {
0212     .start = ipoib_path_seq_start,
0213     .next  = ipoib_path_seq_next,
0214     .stop  = ipoib_path_seq_stop,
0215     .show  = ipoib_path_seq_show,
0216 };
0217
0218 DEFINE_SEQ_ATTRIBUTE(ipoib_path);
0219
0220 void ipoib_create_debug_files(struct net_device *dev)
0221 {
0222     struct ipoib_dev_priv *priv = ipoib_priv(dev);
0223     char name[IFNAMSIZ + sizeof("_path")];
0224
0225     snprintf(name, sizeof(name), "%s_mcg", dev->name);
0226     priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
0227                            ipoib_root, dev, &ipoib_mcg_fops);
0228
0229     snprintf(name, sizeof(name), "%s_path", dev->name);
0230     priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
0231                         ipoib_root, dev, &ipoib_path_fops);
0232 }
0233
0234 void ipoib_delete_debug_files(struct net_device *dev)
0235 {
0236     struct ipoib_dev_priv *priv = ipoib_priv(dev);
0237
0238     debugfs_remove(priv->mcg_dentry);
0239     debugfs_remove(priv->path_dentry);
0240     priv->mcg_dentry = priv->path_dentry = NULL;
0241 }
0242
0243 void ipoib_register_debugfs(void)
0244 {
0245     ipoib_root = debugfs_create_dir("ipoib", NULL);
0246 }
0247
0248 void ipoib_unregister_debugfs(void)
0249 {
0250     debugfs_remove(ipoib_root);
0251 }