forked from Minki/linux
23e4eef7cf
This patch adds support for Tx and Rx hardware timestamping. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
286 lines
10 KiB
C
286 lines
10 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/clk.h>
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#include <linux/clocksource.h>
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#include <linux/ptp_clock_kernel.h>
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#include <linux/net_tstamp.h>
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#include "xgbe.h"
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#include "xgbe-common.h"
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static cycle_t xgbe_cc_read(const struct cyclecounter *cc)
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{
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struct xgbe_prv_data *pdata = container_of(cc,
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struct xgbe_prv_data,
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tstamp_cc);
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u64 nsec;
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nsec = pdata->hw_if.get_tstamp_time(pdata);
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return nsec;
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}
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static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta)
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{
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struct xgbe_prv_data *pdata = container_of(info,
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struct xgbe_prv_data,
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ptp_clock_info);
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unsigned long flags;
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u64 adjust;
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u32 addend, diff;
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unsigned int neg_adjust = 0;
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if (delta < 0) {
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neg_adjust = 1;
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delta = -delta;
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}
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adjust = pdata->tstamp_addend;
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adjust *= delta;
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diff = div_u64(adjust, 1000000000UL);
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addend = (neg_adjust) ? pdata->tstamp_addend - diff :
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pdata->tstamp_addend + diff;
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spin_lock_irqsave(&pdata->tstamp_lock, flags);
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pdata->hw_if.update_tstamp_addend(pdata, addend);
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spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
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return 0;
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}
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static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta)
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{
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struct xgbe_prv_data *pdata = container_of(info,
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struct xgbe_prv_data,
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ptp_clock_info);
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unsigned long flags;
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u64 nsec;
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spin_lock_irqsave(&pdata->tstamp_lock, flags);
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nsec = timecounter_read(&pdata->tstamp_tc);
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nsec += delta;
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timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec);
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spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
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return 0;
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}
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static int xgbe_gettime(struct ptp_clock_info *info, struct timespec *ts)
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{
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struct xgbe_prv_data *pdata = container_of(info,
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struct xgbe_prv_data,
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ptp_clock_info);
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unsigned long flags;
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u64 nsec;
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spin_lock_irqsave(&pdata->tstamp_lock, flags);
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nsec = timecounter_read(&pdata->tstamp_tc);
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spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
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*ts = ns_to_timespec(nsec);
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return 0;
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}
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static int xgbe_settime(struct ptp_clock_info *info, const struct timespec *ts)
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{
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struct xgbe_prv_data *pdata = container_of(info,
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struct xgbe_prv_data,
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ptp_clock_info);
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unsigned long flags;
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u64 nsec;
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nsec = timespec_to_ns(ts);
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spin_lock_irqsave(&pdata->tstamp_lock, flags);
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timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec);
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spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
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return 0;
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}
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static int xgbe_enable(struct ptp_clock_info *info,
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struct ptp_clock_request *request, int on)
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{
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return -EOPNOTSUPP;
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}
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void xgbe_ptp_register(struct xgbe_prv_data *pdata)
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{
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struct ptp_clock_info *info = &pdata->ptp_clock_info;
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struct ptp_clock *clock;
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struct cyclecounter *cc = &pdata->tstamp_cc;
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u64 dividend;
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snprintf(info->name, sizeof(info->name), "%s",
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netdev_name(pdata->netdev));
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info->owner = THIS_MODULE;
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info->max_adj = clk_get_rate(pdata->ptpclk);
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info->adjfreq = xgbe_adjfreq;
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info->adjtime = xgbe_adjtime;
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info->gettime = xgbe_gettime;
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info->settime = xgbe_settime;
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info->enable = xgbe_enable;
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clock = ptp_clock_register(info, pdata->dev);
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if (IS_ERR(clock)) {
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dev_err(pdata->dev, "ptp_clock_register failed\n");
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return;
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}
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pdata->ptp_clock = clock;
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/* Calculate the addend:
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* addend = 2^32 / (PTP ref clock / 50Mhz)
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* = (2^32 * 50Mhz) / PTP ref clock
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*/
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dividend = 50000000;
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dividend <<= 32;
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pdata->tstamp_addend = div_u64(dividend, clk_get_rate(pdata->ptpclk));
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/* Setup the timecounter */
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cc->read = xgbe_cc_read;
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cc->mask = CLOCKSOURCE_MASK(64);
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cc->mult = 1;
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cc->shift = 0;
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timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc,
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ktime_to_ns(ktime_get_real()));
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/* Disable all timestamping to start */
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XGMAC_IOWRITE(pdata, MAC_TCR, 0);
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pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
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pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
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}
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void xgbe_ptp_unregister(struct xgbe_prv_data *pdata)
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{
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if (pdata->ptp_clock)
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ptp_clock_unregister(pdata->ptp_clock);
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}
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