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
  37 struct file_operations;
  38
  39 #include <linux/debugfs.h>
  40
  41 #include "ipoib.h"
  42
  43 static struct dentry *ipoib_root;
  44
  45 static 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
  57 static 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
  76 static 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
  91 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
  92 {
  93         /* nothing for now */
  94 }
  95
  96 static 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
 126 static 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
 133 static 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
 148 static 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
 156 static 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
 175 static 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
 190 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
 191 {
 192         /* nothing for now */
 193 }
 194
 195 static 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
 232 static 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
 239 static 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
 254 static 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
 262 void 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
 280 void 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
 290 int ipoib_register_debugfs(void)
 291 {
 292         ipoib_root = debugfs_create_dir("ipoib", NULL);
 293         return ipoib_root ? 0 : -ENOMEM;
 294 }
 295
 296 void ipoib_unregister_debugfs(void)
 297 {
 298         debugfs_remove(ipoib_root);
 299 }