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/* Copyright 2008-2013 Freescale Semiconductor Inc.
*
* 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.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/module.h>
#include <linux/fsl_qman.h> /* struct qm_mcr_querycgr */
#include <linux/debugfs.h>
#include "dpaa_debugfs.h"
#include "dpaa_eth.h" /* struct dpa_priv_s, dpa_percpu_priv_s, dpa_bp */
#define DPA_DEBUGFS_DESCRIPTION "FSL DPAA Ethernet debugfs entries"
#define DPA_ETH_DEBUGFS_ROOT "fsl_dpa"
static struct dentry *dpa_debugfs_root;
static int __cold dpa_debugfs_loop_open(struct inode *inode, struct file *file);
static ssize_t dpa_loop_write(struct file *f,
const char __user *buf, size_t count, loff_t *off);
static const struct file_operations dpa_debugfs_lp_fops = {
.open = dpa_debugfs_loop_open,
.write = dpa_loop_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int dpa_debugfs_loop_show(struct seq_file *file, void *offset)
{
struct dpa_priv_s *priv;
BUG_ON(offset == NULL);
priv = netdev_priv((struct net_device *)file->private);
seq_printf(file, "%d->%d\n", priv->loop_id, priv->loop_to);
return 0;
}
static int user_input_convert(const char __user *user_buf, size_t count,
long *val)
{
char buf[12];
if (count > sizeof(buf) - 1)
return -EINVAL;
if (copy_from_user(buf, user_buf, count))
return -EFAULT;
buf[count] = '\0';
if (kstrtol(buf, 0, val))
return -EINVAL;
return 0;
}
static ssize_t dpa_loop_write(struct file *f,
const char __user *buf, size_t count, loff_t *off)
{
struct dpa_priv_s *priv;
struct net_device *netdev;
struct seq_file *sf;
int ret;
long val;
ret = user_input_convert(buf, count, &val);
if (ret)
return ret;
sf = (struct seq_file *)f->private_data;
netdev = (struct net_device *)sf->private;
priv = netdev_priv(netdev);
priv->loop_to = ((val < 0) || (val > 20)) ? -1 : val;
return count;
}
static int __cold dpa_debugfs_loop_open(struct inode *inode, struct file *file)
{
int _errno;
const struct net_device *net_dev;
_errno = single_open(file, dpa_debugfs_loop_show, inode->i_private);
if (unlikely(_errno < 0)) {
net_dev = (struct net_device *)inode->i_private;
if (netif_msg_drv((struct dpa_priv_s *)netdev_priv(net_dev)))
netdev_err(net_dev, "single_open() = %d\n",
_errno);
}
return _errno;
}
int dpa_netdev_debugfs_create(struct net_device *net_dev)
{
struct dpa_priv_s *priv = netdev_priv(net_dev);
static int cnt;
char loop_file_name[100];
if (unlikely(dpa_debugfs_root == NULL)) {
pr_err(KBUILD_MODNAME ": %s:%hu:%s(): \t%s\n",
KBUILD_BASENAME".c", __LINE__, __func__,
"root debugfs missing, possible module ordering issue");
return -ENOMEM;
}
sprintf(loop_file_name, "eth%d_loop", ++cnt);
priv->debugfs_loop_file = debugfs_create_file(loop_file_name,
S_IRUGO,
dpa_debugfs_root,
net_dev,
&dpa_debugfs_lp_fops);
if (unlikely(priv->debugfs_loop_file == NULL)) {
netdev_err(net_dev, "debugfs_create_file(%s/%s)",
dpa_debugfs_root->d_iname,
loop_file_name);
return -ENOMEM;
}
return 0;
}
void dpa_netdev_debugfs_remove(struct net_device *net_dev)
{
struct dpa_priv_s *priv = netdev_priv(net_dev);
debugfs_remove(priv->debugfs_loop_file);
}
int __init dpa_debugfs_module_init(void)
{
int _errno = 0;
pr_info(KBUILD_MODNAME ": " DPA_DEBUGFS_DESCRIPTION "\n");
dpa_debugfs_root = debugfs_create_dir(DPA_ETH_DEBUGFS_ROOT, NULL);
if (unlikely(dpa_debugfs_root == NULL)) {
_errno = -ENOMEM;
pr_err(KBUILD_MODNAME ": %s:%hu:%s():\n",
KBUILD_BASENAME".c", __LINE__, __func__);
pr_err("\tdebugfs_create_dir(%s/"KBUILD_MODNAME") = %d\n",
DPA_ETH_DEBUGFS_ROOT, _errno);
}
return _errno;
}
void __exit dpa_debugfs_module_exit(void)
{
debugfs_remove(dpa_debugfs_root);
}
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