text: /*
   * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   *
   * $Id: ipoib_fs.c 1389 2004-12-27 22:56:47Z roland $
   */
  
  #include <linux/err.h>
  #include <linux/seq_file.h>
  
  struct file_operations;
  
  #include <linux/debugfs.h>
  
  #include "ipoib.h"
  
  static struct dentry *ipoib_root;
  
  static void format_gid(union ib_gid *gid, char *buf)
  {
  	int i, n;
  
  	for (n = 0, i = 0; i < 8; ++i) {
  		n += sprintf(buf + n, "%x",
  			     be16_to_cpu(((__be16 *) gid->raw)[i]));
  		if (i < 7)
  			buf[n++] = ':';
  	}
  }
  
  static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
  {
  	struct ipoib_mcast_iter *iter;
  	loff_t n = *pos;
  
  	iter = ipoib_mcast_iter_init(file->private);
  	if (!iter)
  		return NULL;
  
  	while (n--) {
  		if (ipoib_mcast_iter_next(iter)) {
  			kfree(iter);
  			return NULL;
  		}
  	}
  
  	return iter;
  }
  
  static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
  				   loff_t *pos)
  {
  	struct ipoib_mcast_iter *iter = iter_ptr;
  
  	(*pos)++;
  
  	if (ipoib_mcast_iter_next(iter)) {
  		kfree(iter);
  		return NULL;
  	}
  
  	return iter;
  }
  
  static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
  {
  	/* nothing for now */
  }
  
  static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
  {
  	struct ipoib_mcast_iter *iter = iter_ptr;
  	char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
  	union ib_gid mgid;
  	unsigned long created;
  	unsigned int queuelen, complete, send_only;
  
  	if (!iter)
  		return 0;
  
  	ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
  			      &complete, &send_only);
  
  	format_gid(&mgid, gid_buf);
  
  	seq_printf(file,
  		   "GID: %s\n"
  		   "  created: %10ld\n"
  		   "  queuelen: %9d\n"
  		   "  complete: %9s\n"
  		   "  send_only: %8s\n"
  		   "\n",
  		   gid_buf, created, queuelen,
  		   complete ? "yes" : "no",
  		   send_only ? "yes" : "no");
  
  	return 0;
  }
  
  static struct seq_operations ipoib_mcg_seq_ops = {
  	.start = ipoib_mcg_seq_start,
  	.next  = ipoib_mcg_seq_next,
  	.stop  = ipoib_mcg_seq_stop,
  	.show  = ipoib_mcg_seq_show,
  };
  
  static int ipoib_mcg_open(struct inode *inode, struct file *file)
  {
  	struct seq_file *seq;
  	int ret;
  
  	ret = seq_open(file, &ipoib_mcg_seq_ops);
  	if (ret)
  		return ret;
  
  	seq = file->private_data;
  	seq->private = inode->i_private;
  
  	return 0;
  }
  
  static const struct file_operations ipoib_mcg_fops = {
  	.owner   = THIS_MODULE,
  	.open    = ipoib_mcg_open,
  	.read    = seq_read,
  	.llseek  = seq_lseek,
  	.release = seq_release
  };
  
  static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
  {
  	struct ipoib_path_iter *iter;
  	loff_t n = *pos;
  
  	iter = ipoib_path_iter_init(file->private);
  	if (!iter)
  		return NULL;
  
  	while (n--) {
  		if (ipoib_path_iter_next(iter)) {
  			kfree(iter);
  			return NULL;
  		}
  	}
  
  	return iter;
  }
  
  static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
  				   loff_t *pos)
  {
  	struct ipoib_path_iter *iter = iter_ptr;
  
  	(*pos)++;
  
  	if (ipoib_path_iter_next(iter)) {
  		kfree(iter);
  		return NULL;
  	}
  
  	return iter;
  }
  
  static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
  {
  	/* nothing for now */
  }
  
  static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
  {
  	struct ipoib_path_iter *iter = iter_ptr;
  	char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
  	struct ipoib_path path;
  	int rate;
  
  	if (!iter)
  		return 0;
  
  	ipoib_path_iter_read(iter, &path);
  
  	format_gid(&path.pathrec.dgid, gid_buf);
  
  	seq_printf(file,
  		   "GID: %s\n"
  		   "  complete: %6s\n",
  		   gid_buf, path.pathrec.dlid ? "yes" : "no");
  
  	if (path.pathrec.dlid) {
  		rate = ib_rate_to_mult(path.pathrec.rate) * 25;
  
  		seq_printf(file,
  			   "  DLID:     0x%04x\n"
  			   "  SL: %12d\n"
  			   "  rate: %*d%s Gb/sec\n",
  			   be16_to_cpu(path.pathrec.dlid),
  			   path.pathrec.sl,
  			   10 - ((rate % 10) ? 2 : 0),
  			   rate / 10, rate % 10 ? ".5" : "");
  	}
  
  	seq_putc(file, '\n');
  
  	return 0;
  }
  
  static struct seq_operations ipoib_path_seq_ops = {
  	.start = ipoib_path_seq_start,
  	.next  = ipoib_path_seq_next,
  	.stop  = ipoib_path_seq_stop,
  	.show  = ipoib_path_seq_show,
  };
  
  static int ipoib_path_open(struct inode *inode, struct file *file)
  {
  	struct seq_file *seq;
  	int ret;
  
  	ret = seq_open(file, &ipoib_path_seq_ops);
  	if (ret)
  		return ret;
  
  	seq = file->private_data;
  	seq->private = inode->i_private;
  
  	return 0;
  }
  
  static const struct file_operations ipoib_path_fops = {
  	.owner   = THIS_MODULE,
  	.open    = ipoib_path_open,
  	.read    = seq_read,
  	.llseek  = seq_lseek,
  	.release = seq_release
  };
  
  void ipoib_create_debug_files(struct net_device *dev)
  {
  	struct ipoib_dev_priv *priv = netdev_priv(dev);
  	char name[IFNAMSIZ + sizeof "_path"];
  
  	snprintf(name, sizeof name, "%s_mcg", dev->name);
  	priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
  					       ipoib_root, dev, &ipoib_mcg_fops);
  	if (!priv->mcg_dentry)
  		ipoib_warn(priv, "failed to create mcg debug file\n");
  
  	snprintf(name, sizeof name, "%s_path", dev->name);
  	priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
  						ipoib_root, dev, &ipoib_path_fops);
  	if (!priv->path_dentry)
  		ipoib_warn(priv, "failed to create path debug file\n");
  }
  
  void ipoib_delete_debug_files(struct net_device *dev)
  {
  	struct ipoib_dev_priv *priv = netdev_priv(dev);
  
  	if (priv->mcg_dentry)
  		debugfs_remove(priv->mcg_dentry);
  	if (priv->path_dentry)
  		debugfs_remove(priv->path_dentry);
  }
  
  int ipoib_register_debugfs(void)
  {
  	ipoib_root = debugfs_create_dir("ipoib", NULL);
  	return ipoib_root ? 0 : -ENOMEM;
  }
  
  void ipoib_unregister_debugfs(void)
  {
  	debugfs_remove(ipoib_root);
  }
  