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
  36 struct file_operations;
  37
  38 #include <linux/debugfs.h>
  39
  40 #include "ipoib.h"
  41
  42 static struct dentry *ipoib_root;
  43
  44 static void format_gid(union ib_gid *gid, char *buf)
  45 {
  46         int i, n;
  47
  48         for (n = 0, i = 0; i < 8; ++i) {
  49                 n += sprintf(buf + n, "%x",
  50                              be16_to_cpu(((__be16 *) gid->raw)[i]));
  51                 if (i < 7)
  52                         buf[n++] = ':';
  53         }
  54 }
  55
  56 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
  57 {
  58         struct ipoib_mcast_iter *iter;
  59         loff_t n = *pos;
  60
  61         iter = ipoib_mcast_iter_init(file->private);
  62         if (!iter)
  63                 return NULL;
  64
  65         while (n--) {
  66                 if (ipoib_mcast_iter_next(iter)) {
  67                         kfree(iter);
  68                         return NULL;
  69                 }
  70         }
  71
  72         return iter;
  73 }
  74
  75 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
  76                                    loff_t *pos)
  77 {
  78         struct ipoib_mcast_iter *iter = iter_ptr;
  79
  80         (*pos)++;
  81
  82         if (ipoib_mcast_iter_next(iter)) {
  83                 kfree(iter);
  84                 return NULL;
  85         }
  86
  87         return iter;
  88 }
  89
  90 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
  91 {
  92         /* nothing for now */
  93 }
  94
  95 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
  96 {
  97         struct ipoib_mcast_iter *iter = iter_ptr;
  98         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
  99         union ib_gid mgid;
 100         unsigned long created;
 101         unsigned int queuelen, complete, send_only;
 102
 103         if (!iter)
 104                 return 0;
 105
 106         ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
 107                               &complete, &send_only);
 108
 109         format_gid(&mgid, gid_buf);
 110
 111         seq_printf(file,
 112                    "GID: %s\n"
 113                    "  created: %10ld\n"
 114                    "  queuelen: %9d\n"
 115                    "  complete: %9s\n"
 116                    "  send_only: %8s\n"
 117                    "\n",
 118                    gid_buf, created, queuelen,
 119                    complete ? "yes" : "no",
 120                    send_only ? "yes" : "no");
 121
 122         return 0;
 123 }
 124
 125 static const struct seq_operations ipoib_mcg_seq_ops = {
 126         .start = ipoib_mcg_seq_start,
 127         .next  = ipoib_mcg_seq_next,
 128         .stop  = ipoib_mcg_seq_stop,
 129         .show  = ipoib_mcg_seq_show,
 130 };
 131
 132 static int ipoib_mcg_open(struct inode *inode, struct file *file)
 133 {
 134         struct seq_file *seq;
 135         int ret;
 136
 137         ret = seq_open(file, &ipoib_mcg_seq_ops);
 138         if (ret)
 139                 return ret;
 140
 141         seq = file->private_data;
 142         seq->private = inode->i_private;
 143
 144         return 0;
 145 }
 146
 147 static const struct file_operations ipoib_mcg_fops = {
 148         .owner   = THIS_MODULE,
 149         .open    = ipoib_mcg_open,
 150         .read    = seq_read,
 151         .llseek  = seq_lseek,
 152         .release = seq_release
 153 };
 154
 155 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
 156 {
 157         struct ipoib_path_iter *iter;
 158         loff_t n = *pos;
 159
 160         iter = ipoib_path_iter_init(file->private);
 161         if (!iter)
 162                 return NULL;
 163
 164         while (n--) {
 165                 if (ipoib_path_iter_next(iter)) {
 166                         kfree(iter);
 167                         return NULL;
 168                 }
 169         }
 170
 171         return iter;
 172 }
 173
 174 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
 175                                    loff_t *pos)
 176 {
 177         struct ipoib_path_iter *iter = iter_ptr;
 178
 179         (*pos)++;
 180
 181         if (ipoib_path_iter_next(iter)) {
 182                 kfree(iter);
 183                 return NULL;
 184         }
 185
 186         return iter;
 187 }
 188
 189 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
 190 {
 191         /* nothing for now */
 192 }
 193
 194 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
 195 {
 196         struct ipoib_path_iter *iter = iter_ptr;
 197         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
 198         struct ipoib_path path;
 199         int rate;
 200
 201         if (!iter)
 202                 return 0;
 203
 204         ipoib_path_iter_read(iter, &path);
 205
 206         format_gid(&path.pathrec.dgid, gid_buf);
 207
 208         seq_printf(file,
 209                    "GID: %s\n"
 210                    "  complete: %6s\n",
 211                    gid_buf, path.pathrec.dlid ? "yes" : "no");
 212
 213         if (path.pathrec.dlid) {
 214                 rate = ib_rate_to_mult(path.pathrec.rate) * 25;
 215
 216                 seq_printf(file,
 217                            "  DLID:     0x%04x\n"
 218                            "  SL: %12d\n"
 219                            "  rate: %*d%s Gb/sec\n",
 220                            be16_to_cpu(path.pathrec.dlid),
 221                            path.pathrec.sl,
 222                            10 - ((rate % 10) ? 2 : 0),
 223                            rate / 10, rate % 10 ? ".5" : "");
 224         }
 225
 226         seq_putc(file, '\n');
 227
 228         return 0;
 229 }
 230
 231 static const struct seq_operations ipoib_path_seq_ops = {
 232         .start = ipoib_path_seq_start,
 233         .next  = ipoib_path_seq_next,
 234         .stop  = ipoib_path_seq_stop,
 235         .show  = ipoib_path_seq_show,
 236 };
 237
 238 static int ipoib_path_open(struct inode *inode, struct file *file)
 239 {
 240         struct seq_file *seq;
 241         int ret;
 242
 243         ret = seq_open(file, &ipoib_path_seq_ops);
 244         if (ret)
 245                 return ret;
 246
 247         seq = file->private_data;
 248         seq->private = inode->i_private;
 249
 250         return 0;
 251 }
 252
 253 static const struct file_operations ipoib_path_fops = {
 254         .owner   = THIS_MODULE,
 255         .open    = ipoib_path_open,
 256         .read    = seq_read,
 257         .llseek  = seq_lseek,
 258         .release = seq_release
 259 };
 260
 261 void ipoib_create_debug_files(struct net_device *dev)
 262 {
 263         struct ipoib_dev_priv *priv = netdev_priv(dev);
 264         char name[IFNAMSIZ + sizeof "_path"];
 265
 266         snprintf(name, sizeof name, "%s_mcg", dev->name);
 267         priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
 268                                                ipoib_root, dev, &ipoib_mcg_fops);
 269         if (!priv->mcg_dentry)
 270                 ipoib_warn(priv, "failed to create mcg debug file\n");
 271
 272         snprintf(name, sizeof name, "%s_path", dev->name);
 273         priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
 274                                                 ipoib_root, dev, &ipoib_path_fops);
 275         if (!priv->path_dentry)
 276                 ipoib_warn(priv, "failed to create path debug file\n");
 277 }
 278
 279 void ipoib_delete_debug_files(struct net_device *dev)
 280 {
 281         struct ipoib_dev_priv *priv = netdev_priv(dev);
 282
 283         if (priv->mcg_dentry)
 284                 debugfs_remove(priv->mcg_dentry);
 285         if (priv->path_dentry)
 286                 debugfs_remove(priv->path_dentry);
 287 }
 288
 289 int ipoib_register_debugfs(void)
 290 {
 291         ipoib_root = debugfs_create_dir("ipoib", NULL);
 292         return ipoib_root ? 0 : -ENOMEM;
 293 }
 294
 295 void ipoib_unregister_debugfs(void)
 296 {
 297         debugfs_remove(ipoib_root);
 298 }