linux-stable/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c

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/*
* AMD 10Gb Ethernet driver
*
* This file is available to you under your choice of the following two
* licenses:
*
* License 1: GPLv2
*
* Copyright (c) 2014 Advanced Micro Devices, Inc.
*
* This file is free software; you may copy, redistribute and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or (at
* your option) any later version.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* The Synopsys DWC ETHER XGMAC Software Driver and documentation
* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
* Inc. unless otherwise expressly agreed to in writing between Synopsys
* and you.
*
* The Software IS NOT an item of Licensed Software or Licensed Product
* under any End User Software License Agreement or Agreement for Licensed
* Product with Synopsys or any supplement thereto. Permission is hereby
* granted, free of charge, to any person obtaining a copy of this software
* annotated with this license and the Software, to deal in the Software
* without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
* 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.
*
*
* License 2: Modified BSD
*
* Copyright (c) 2014 Advanced Micro Devices, Inc.
* All rights reserved.
*
* 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 Advanced Micro Devices, Inc. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 <COPYRIGHT HOLDER> 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.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* The Synopsys DWC ETHER XGMAC Software Driver and documentation
* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
* Inc. unless otherwise expressly agreed to in writing between Synopsys
* and you.
*
* The Software IS NOT an item of Licensed Software or Licensed Product
* under any End User Software License Agreement or Agreement for Licensed
* Product with Synopsys or any supplement thereto. Permission is hereby
* granted, free of charge, to any person obtaining a copy of this software
* annotated with this license and the Software, to deal in the Software
* without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
* 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/debugfs.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "xgbe.h"
#include "xgbe-common.h"
static ssize_t xgbe_common_read(char __user *buffer, size_t count,
loff_t *ppos, unsigned int value)
{
char *buf;
ssize_t len;
if (*ppos != 0)
return 0;
buf = kasprintf(GFP_KERNEL, "0x%08x\n", value);
if (!buf)
return -ENOMEM;
if (count < strlen(buf)) {
kfree(buf);
return -ENOSPC;
}
len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
kfree(buf);
return len;
}
static ssize_t xgbe_common_write(const char __user *buffer, size_t count,
loff_t *ppos, unsigned int *value)
{
char workarea[32];
ssize_t len;
int ret;
if (*ppos != 0)
return -EINVAL;
if (count >= sizeof(workarea))
return -ENOSPC;
len = simple_write_to_buffer(workarea, sizeof(workarea) - 1, ppos,
buffer, count);
if (len < 0)
return len;
workarea[len] = '\0';
ret = kstrtouint(workarea, 16, value);
if (ret)
return -EIO;
return len;
}
static ssize_t xgmac_reg_addr_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xgmac_reg);
}
static ssize_t xgmac_reg_addr_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_write(buffer, count, ppos,
&pdata->debugfs_xgmac_reg);
}
static ssize_t xgmac_reg_value_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
value = XGMAC_IOREAD(pdata, pdata->debugfs_xgmac_reg);
return xgbe_common_read(buffer, count, ppos, value);
}
static ssize_t xgmac_reg_value_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
ssize_t len;
len = xgbe_common_write(buffer, count, ppos, &value);
if (len < 0)
return len;
XGMAC_IOWRITE(pdata, pdata->debugfs_xgmac_reg, value);
return len;
}
static const struct file_operations xgmac_reg_addr_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xgmac_reg_addr_read,
.write = xgmac_reg_addr_write,
};
static const struct file_operations xgmac_reg_value_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xgmac_reg_value_read,
.write = xgmac_reg_value_write,
};
static ssize_t xpcs_mmd_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_mmd);
}
static ssize_t xpcs_mmd_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_write(buffer, count, ppos,
&pdata->debugfs_xpcs_mmd);
}
static ssize_t xpcs_reg_addr_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_reg);
}
static ssize_t xpcs_reg_addr_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_write(buffer, count, ppos,
&pdata->debugfs_xpcs_reg);
}
static ssize_t xpcs_reg_value_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
value = XMDIO_READ(pdata, pdata->debugfs_xpcs_mmd,
pdata->debugfs_xpcs_reg);
return xgbe_common_read(buffer, count, ppos, value);
}
static ssize_t xpcs_reg_value_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
ssize_t len;
len = xgbe_common_write(buffer, count, ppos, &value);
if (len < 0)
return len;
XMDIO_WRITE(pdata, pdata->debugfs_xpcs_mmd, pdata->debugfs_xpcs_reg,
value);
return len;
}
static const struct file_operations xpcs_mmd_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xpcs_mmd_read,
.write = xpcs_mmd_write,
};
static const struct file_operations xpcs_reg_addr_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xpcs_reg_addr_read,
.write = xpcs_reg_addr_write,
};
static const struct file_operations xpcs_reg_value_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xpcs_reg_value_read,
.write = xpcs_reg_value_write,
};
static ssize_t xprop_reg_addr_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xprop_reg);
}
static ssize_t xprop_reg_addr_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_write(buffer, count, ppos,
&pdata->debugfs_xprop_reg);
}
static ssize_t xprop_reg_value_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
value = XP_IOREAD(pdata, pdata->debugfs_xprop_reg);
return xgbe_common_read(buffer, count, ppos, value);
}
static ssize_t xprop_reg_value_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
ssize_t len;
len = xgbe_common_write(buffer, count, ppos, &value);
if (len < 0)
return len;
XP_IOWRITE(pdata, pdata->debugfs_xprop_reg, value);
return len;
}
static const struct file_operations xprop_reg_addr_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xprop_reg_addr_read,
.write = xprop_reg_addr_write,
};
static const struct file_operations xprop_reg_value_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xprop_reg_value_read,
.write = xprop_reg_value_write,
};
static ssize_t xi2c_reg_addr_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xi2c_reg);
}
static ssize_t xi2c_reg_addr_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
return xgbe_common_write(buffer, count, ppos,
&pdata->debugfs_xi2c_reg);
}
static ssize_t xi2c_reg_value_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
value = XI2C_IOREAD(pdata, pdata->debugfs_xi2c_reg);
return xgbe_common_read(buffer, count, ppos, value);
}
static ssize_t xi2c_reg_value_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct xgbe_prv_data *pdata = filp->private_data;
unsigned int value;
ssize_t len;
len = xgbe_common_write(buffer, count, ppos, &value);
if (len < 0)
return len;
XI2C_IOWRITE(pdata, pdata->debugfs_xi2c_reg, value);
return len;
}
static const struct file_operations xi2c_reg_addr_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xi2c_reg_addr_read,
.write = xi2c_reg_addr_write,
};
static const struct file_operations xi2c_reg_value_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = xi2c_reg_value_read,
.write = xi2c_reg_value_write,
};
void xgbe_debugfs_init(struct xgbe_prv_data *pdata)
{
char *buf;
/* Set defaults */
pdata->debugfs_xgmac_reg = 0;
pdata->debugfs_xpcs_mmd = 1;
pdata->debugfs_xpcs_reg = 0;
buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name);
if (!buf)
return;
pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
debugfs_create_file("xgmac_register", 0600, pdata->xgbe_debugfs, pdata,
&xgmac_reg_addr_fops);
debugfs_create_file("xgmac_register_value", 0600, pdata->xgbe_debugfs,
pdata, &xgmac_reg_value_fops);
debugfs_create_file("xpcs_mmd", 0600, pdata->xgbe_debugfs, pdata,
&xpcs_mmd_fops);
debugfs_create_file("xpcs_register", 0600, pdata->xgbe_debugfs, pdata,
&xpcs_reg_addr_fops);
debugfs_create_file("xpcs_register_value", 0600, pdata->xgbe_debugfs,
pdata, &xpcs_reg_value_fops);
if (pdata->xprop_regs) {
debugfs_create_file("xprop_register", 0600, pdata->xgbe_debugfs,
pdata, &xprop_reg_addr_fops);
debugfs_create_file("xprop_register_value", 0600,
pdata->xgbe_debugfs, pdata,
&xprop_reg_value_fops);
}
if (pdata->xi2c_regs) {
debugfs_create_file("xi2c_register", 0600, pdata->xgbe_debugfs,
pdata, &xi2c_reg_addr_fops);
debugfs_create_file("xi2c_register_value", 0600,
pdata->xgbe_debugfs, pdata,
&xi2c_reg_value_fops);
}
if (pdata->vdata->an_cdr_workaround) {
debugfs_create_bool("an_cdr_workaround", 0600,
pdata->xgbe_debugfs,
&pdata->debugfs_an_cdr_workaround);
debugfs_create_bool("an_cdr_track_early", 0600,
pdata->xgbe_debugfs,
&pdata->debugfs_an_cdr_track_early);
}
kfree(buf);
}
void xgbe_debugfs_exit(struct xgbe_prv_data *pdata)
{
debugfs_remove_recursive(pdata->xgbe_debugfs);
pdata->xgbe_debugfs = NULL;
}
void xgbe_debugfs_rename(struct xgbe_prv_data *pdata)
{
char *buf;
if (!pdata->xgbe_debugfs)
return;
buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name);
if (!buf)
return;
if (!strcmp(pdata->xgbe_debugfs->d_name.name, buf))
goto out;
debugfs_rename(pdata->xgbe_debugfs->d_parent, pdata->xgbe_debugfs,
pdata->xgbe_debugfs->d_parent, buf);
out:
kfree(buf);
}