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279 lines
10 KiB
279 lines
10 KiB
/* |
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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 |
|
* 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 |
|
* 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, |
|
* 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: |
|
* |
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* The above copyright notice and this permission notice shall be included |
|
* in all copies or substantial portions of the Software. |
|
* |
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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 u64 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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spin_lock_irqsave(&pdata->tstamp_lock, flags); |
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timecounter_adjtime(&pdata->tstamp_tc, delta); |
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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 timespec64 *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_timespec64(nsec); |
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return 0; |
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} |
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static int xgbe_settime(struct ptp_clock_info *info, |
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const struct timespec64 *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 = timespec64_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 = pdata->ptpclk_rate; |
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info->adjfreq = xgbe_adjfreq; |
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info->adjtime = xgbe_adjtime; |
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info->gettime64 = xgbe_gettime; |
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info->settime64 = 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, pdata->ptpclk_rate); |
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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_TSCR, 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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