sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_fs.c

   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
  41 struct file_operations;
  42
  43 #include <linux/debugfs.h>
  44
  45 #include "ipoib.h"
  46
  47 static struct dentry *ipoib_root;
  48
  49 static 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
  61 static 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
  80 static 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
  95 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
  96 {
  97         /* nothing for now */
  98 }
  99
 100 static 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
 130 static 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
 137 static 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
 152 static 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
 160 static 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
 179 static 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
 194 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
 195 {
 196         /* nothing for now */
 197 }
 198
 199 static 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
 236 static 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
 243 static 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
 258 static 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
 266 void 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
 284 void 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
 294 int ipoib_register_debugfs(void)
 295 {
 296         ipoib_root = debugfs_create_dir("ipoib", NULL);
 297         return ipoib_root ? 0 : -ENOMEM;
 298 }
 299
 300 void ipoib_unregister_debugfs(void)
 301 {
 302         debugfs_remove(ipoib_root);
 303 }