mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 10:55:09 +07:00
96f4d430c5
Update xgbe-phy-v2.c to make use of the auto-negotiation (AN) phy hooks to improve the ability to successfully complete Clause 73 AN when running at 10gbps. Hardware can sometimes have issues with CDR lock when the AN DME page exchange is being performed. The AN and KR training hooks are used as follows: - The pre AN hook is used to disable CDR tracking in the PHY so that the DME page exchange can be successfully and consistently completed. - The post KR training hook is used to re-enable the CDR tracking so that KR training can successfully complete. - The post AN hook is used to check for an unsuccessful AN which will increase a CDR tracking enablement delay (up to a maximum value). Add two debugfs entries to allow control over use of the CDR tracking workaround. The debugfs entries allow the CDR tracking workaround to be disabled and determine whether to re-enable CDR tracking before or after link training has been initiated. Also, with these changes the receiver reset cycle that is performed during the link status check can be performed less often. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
571 lines
17 KiB
C
571 lines
17 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
|
|
* and you.
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*
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|
* 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
|
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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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int ret;
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if (*ppos != 0)
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return -EINVAL;
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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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ret = kstrtouint(workarea, 16, value);
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if (ret)
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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 = XMDIO_READ(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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XMDIO_WRITE(pdata, pdata->debugfs_xpcs_mmd, pdata->debugfs_xpcs_reg,
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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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static ssize_t xprop_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_xprop_reg);
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}
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static ssize_t xprop_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_xprop_reg);
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}
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static ssize_t xprop_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 = XP_IOREAD(pdata, pdata->debugfs_xprop_reg);
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return xgbe_common_read(buffer, count, ppos, value);
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}
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static ssize_t xprop_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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XP_IOWRITE(pdata, pdata->debugfs_xprop_reg, value);
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return len;
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}
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static const struct file_operations xprop_reg_addr_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xprop_reg_addr_read,
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.write = xprop_reg_addr_write,
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};
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static const struct file_operations xprop_reg_value_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xprop_reg_value_read,
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.write = xprop_reg_value_write,
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};
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static ssize_t xi2c_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_xi2c_reg);
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}
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static ssize_t xi2c_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_xi2c_reg);
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}
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static ssize_t xi2c_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 = XI2C_IOREAD(pdata, pdata->debugfs_xi2c_reg);
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return xgbe_common_read(buffer, count, ppos, value);
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}
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static ssize_t xi2c_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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XI2C_IOWRITE(pdata, pdata->debugfs_xi2c_reg, value);
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return len;
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}
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static const struct file_operations xi2c_reg_addr_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xi2c_reg_addr_read,
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.write = xi2c_reg_addr_write,
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};
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static const struct file_operations xi2c_reg_value_fops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = xi2c_reg_value_read,
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.write = xi2c_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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if (!buf)
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return;
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pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
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if (!pdata->xgbe_debugfs) {
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netdev_err(pdata->netdev, "debugfs_create_dir failed\n");
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kfree(buf);
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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");
|
|
|
|
pfile = debugfs_create_file("xgmac_register_value", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xgmac_reg_value_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev, "debugfs_create_file failed\n");
|
|
|
|
pfile = debugfs_create_file("xpcs_mmd", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xpcs_mmd_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev, "debugfs_create_file failed\n");
|
|
|
|
pfile = debugfs_create_file("xpcs_register", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xpcs_reg_addr_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev, "debugfs_create_file failed\n");
|
|
|
|
pfile = debugfs_create_file("xpcs_register_value", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xpcs_reg_value_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev, "debugfs_create_file failed\n");
|
|
|
|
if (pdata->xprop_regs) {
|
|
pfile = debugfs_create_file("xprop_register", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xprop_reg_addr_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev,
|
|
"debugfs_create_file failed\n");
|
|
|
|
pfile = debugfs_create_file("xprop_register_value", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xprop_reg_value_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev,
|
|
"debugfs_create_file failed\n");
|
|
}
|
|
|
|
if (pdata->xi2c_regs) {
|
|
pfile = debugfs_create_file("xi2c_register", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xi2c_reg_addr_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev,
|
|
"debugfs_create_file failed\n");
|
|
|
|
pfile = debugfs_create_file("xi2c_register_value", 0600,
|
|
pdata->xgbe_debugfs, pdata,
|
|
&xi2c_reg_value_fops);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev,
|
|
"debugfs_create_file failed\n");
|
|
}
|
|
|
|
if (pdata->vdata->an_cdr_workaround) {
|
|
pfile = debugfs_create_bool("an_cdr_workaround", 0600,
|
|
pdata->xgbe_debugfs,
|
|
&pdata->debugfs_an_cdr_workaround);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev,
|
|
"debugfs_create_bool failed\n");
|
|
|
|
pfile = debugfs_create_bool("an_cdr_track_early", 0600,
|
|
pdata->xgbe_debugfs,
|
|
&pdata->debugfs_an_cdr_track_early);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev,
|
|
"debugfs_create_bool failed\n");
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct dentry *pfile;
|
|
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;
|
|
|
|
pfile = debugfs_rename(pdata->xgbe_debugfs->d_parent,
|
|
pdata->xgbe_debugfs,
|
|
pdata->xgbe_debugfs->d_parent, buf);
|
|
if (!pfile)
|
|
netdev_err(pdata->netdev, "debugfs_rename failed\n");
|
|
|
|
out:
|
|
kfree(buf);
|
|
}
|