c5aa9e3b81
This patch provides the initial platform driver for the AMD 10GbE device. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
375 lines
12 KiB
C
375 lines
12 KiB
C
/*
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* AMD 10Gb Ethernet driver
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*
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* This file is available to you under your choice of the following two
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* licenses:
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*
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* License 1: GPLv2
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*
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* Copyright (c) 2014 Advanced Micro Devices, Inc.
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*
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* This file is free software; you may copy, redistribute and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or (at
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* your option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* The Synopsys DWC ETHER XGMAC Software Driver and documentation
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* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
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* Inc. unless otherwise expressly agreed to in writing between Synopsys
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* and you.
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*
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* The Software IS NOT an item of Licensed Software or Licensed Product
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* under any End User Software License Agreement or Agreement for Licensed
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* Product with Synopsys or any supplement thereto. Permission is hereby
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* granted, free of charge, to any person obtaining a copy of this software
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* annotated with this license and the Software, to deal in the Software
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* without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
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* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* License 2: Modified BSD
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*
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* Copyright (c) 2014 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Advanced Micro Devices, Inc. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* The Synopsys DWC ETHER XGMAC Software Driver and documentation
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* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
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* Inc. unless otherwise expressly agreed to in writing between Synopsys
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* and you.
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*
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* The Software IS NOT an item of Licensed Software or Licensed Product
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* under any End User Software License Agreement or Agreement for Licensed
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* Product with Synopsys or any supplement thereto. Permission is hereby
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* granted, free of charge, to any person obtaining a copy of this software
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* annotated with this license and the Software, to deal in the Software
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* without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
|
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* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "xgbe.h"
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#include "xgbe-common.h"
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static ssize_t xgbe_common_read(char __user *buffer, size_t count,
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loff_t *ppos, unsigned int value)
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{
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char *buf;
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ssize_t len;
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if (*ppos != 0)
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return 0;
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buf = kasprintf(GFP_KERNEL, "0x%08x\n", value);
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if (!buf)
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return -ENOMEM;
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if (count < strlen(buf)) {
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kfree(buf);
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return -ENOSPC;
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}
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len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
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kfree(buf);
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return len;
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}
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static ssize_t xgbe_common_write(const char __user *buffer, size_t count,
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loff_t *ppos, unsigned int *value)
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{
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char workarea[32];
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ssize_t len;
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unsigned int scan_value;
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if (*ppos != 0)
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return 0;
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if (count >= sizeof(workarea))
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return -ENOSPC;
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len = simple_write_to_buffer(workarea, sizeof(workarea) - 1, ppos,
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buffer, count);
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if (len < 0)
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return len;
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workarea[len] = '\0';
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if (sscanf(workarea, "%x", &scan_value) == 1)
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*value = scan_value;
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else
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return -EIO;
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return len;
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}
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static ssize_t xgmac_reg_addr_read(struct file *filp, char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xgmac_reg);
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}
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static ssize_t xgmac_reg_addr_write(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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return xgbe_common_write(buffer, count, ppos,
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&pdata->debugfs_xgmac_reg);
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}
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static ssize_t xgmac_reg_value_read(struct file *filp, char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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unsigned int value;
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value = XGMAC_IOREAD(pdata, pdata->debugfs_xgmac_reg);
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return xgbe_common_read(buffer, count, ppos, value);
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}
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static ssize_t xgmac_reg_value_write(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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unsigned int value;
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ssize_t len;
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len = xgbe_common_write(buffer, count, ppos, &value);
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if (len < 0)
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return len;
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XGMAC_IOWRITE(pdata, pdata->debugfs_xgmac_reg, value);
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return len;
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}
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static const struct file_operations xgmac_reg_addr_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xgmac_reg_addr_read,
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.write = xgmac_reg_addr_write,
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};
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static const struct file_operations xgmac_reg_value_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xgmac_reg_value_read,
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.write = xgmac_reg_value_write,
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};
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static ssize_t xpcs_mmd_read(struct file *filp, char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_mmd);
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}
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static ssize_t xpcs_mmd_write(struct file *filp, const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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return xgbe_common_write(buffer, count, ppos,
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&pdata->debugfs_xpcs_mmd);
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}
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static ssize_t xpcs_reg_addr_read(struct file *filp, char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_reg);
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}
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static ssize_t xpcs_reg_addr_write(struct file *filp, const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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return xgbe_common_write(buffer, count, ppos,
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&pdata->debugfs_xpcs_reg);
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}
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static ssize_t xpcs_reg_value_read(struct file *filp, char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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unsigned int value;
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value = pdata->hw_if.read_mmd_regs(pdata, pdata->debugfs_xpcs_mmd,
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pdata->debugfs_xpcs_reg);
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return xgbe_common_read(buffer, count, ppos, value);
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}
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static ssize_t xpcs_reg_value_write(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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struct xgbe_prv_data *pdata = filp->private_data;
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unsigned int value;
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ssize_t len;
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len = xgbe_common_write(buffer, count, ppos, &value);
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if (len < 0)
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return len;
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pdata->hw_if.write_mmd_regs(pdata, pdata->debugfs_xpcs_mmd,
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pdata->debugfs_xpcs_reg, value);
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return len;
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}
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static const struct file_operations xpcs_mmd_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xpcs_mmd_read,
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.write = xpcs_mmd_write,
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};
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static const struct file_operations xpcs_reg_addr_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xpcs_reg_addr_read,
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.write = xpcs_reg_addr_write,
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};
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static const struct file_operations xpcs_reg_value_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xpcs_reg_value_read,
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.write = xpcs_reg_value_write,
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};
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void xgbe_debugfs_init(struct xgbe_prv_data *pdata)
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{
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struct dentry *pfile;
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char *buf;
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/* Set defaults */
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pdata->debugfs_xgmac_reg = 0;
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pdata->debugfs_xpcs_mmd = 1;
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pdata->debugfs_xpcs_reg = 0;
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buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name);
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pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
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if (pdata->xgbe_debugfs == NULL) {
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netdev_err(pdata->netdev, "debugfs_create_dir failed\n");
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return;
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}
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pfile = debugfs_create_file("xgmac_register", 0600,
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pdata->xgbe_debugfs, pdata,
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&xgmac_reg_addr_fops);
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if (!pfile)
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netdev_err(pdata->netdev, "debugfs_create_file failed\n");
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pfile = debugfs_create_file("xgmac_register_value", 0600,
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pdata->xgbe_debugfs, pdata,
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&xgmac_reg_value_fops);
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if (!pfile)
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netdev_err(pdata->netdev, "debugfs_create_file failed\n");
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pfile = debugfs_create_file("xpcs_mmd", 0600,
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pdata->xgbe_debugfs, pdata,
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&xpcs_mmd_fops);
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if (!pfile)
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netdev_err(pdata->netdev, "debugfs_create_file failed\n");
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pfile = debugfs_create_file("xpcs_register", 0600,
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pdata->xgbe_debugfs, pdata,
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&xpcs_reg_addr_fops);
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if (!pfile)
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netdev_err(pdata->netdev, "debugfs_create_file failed\n");
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pfile = debugfs_create_file("xpcs_register_value", 0600,
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pdata->xgbe_debugfs, pdata,
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&xpcs_reg_value_fops);
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if (!pfile)
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netdev_err(pdata->netdev, "debugfs_create_file failed\n");
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kfree(buf);
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}
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void xgbe_debugfs_exit(struct xgbe_prv_data *pdata)
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{
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debugfs_remove_recursive(pdata->xgbe_debugfs);
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pdata->xgbe_debugfs = NULL;
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}
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