FreeBSD/Linux Kernel Cross Reference
sys/dev/axgbe/xgbe-ptp.c

     /*
      * AMD 10Gb Ethernet driver
      *
      * This file is available to you under your choice of the following two
      * licenses:
      *
      * License 1: GPLv2
      *
      * Copyright (c) 2014 Advanced Micro Devices, Inc.
     *
     * This file is free software; you may copy, redistribute and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation, either version 2 of the License, or (at
     * your option) any later version.
     *
     * This file is distributed in the hope that it will be useful, but
     * WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
     * General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program.  If not, see <http://www.gnu.org/licenses/>.
     *
     * This file incorporates work covered by the following copyright and
     * permission notice:
     *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
     *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
     *     Inc. unless otherwise expressly agreed to in writing between Synopsys
     *     and you.
     *
     *     The Software IS NOT an item of Licensed Software or Licensed Product
     *     under any End User Software License Agreement or Agreement for Licensed
     *     Product with Synopsys or any supplement thereto.  Permission is hereby
     *     granted, free of charge, to any person obtaining a copy of this software
     *     annotated with this license and the Software, to deal in the Software
     *     without restriction, including without limitation the rights to use,
     *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
     *     of the Software, and to permit persons to whom the Software is furnished
     *     to do so, subject to the following conditions:
     *
     *     The above copyright notice and this permission notice shall be included
     *     in all copies or substantial portions of the Software.
     *
     *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
     *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
     *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
     *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     *     THE POSSIBILITY OF SUCH DAMAGE.
     *
     *
     * License 2: Modified BSD
     *
     * Copyright (c) 2014 Advanced Micro Devices, Inc.
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions are met:
     *     * Redistributions of source code must retain the above copyright
     *       notice, this list of conditions and the following disclaimer.
     *     * Redistributions in binary form must reproduce the above copyright
     *       notice, this list of conditions and the following disclaimer in the
     *       documentation and/or other materials provided with the distribution.
     *     * Neither the name of Advanced Micro Devices, Inc. nor the
     *       names of its contributors may be used to endorse or promote products
     *       derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
     * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * This file incorporates work covered by the following copyright and
     * permission notice:
     *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
     *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
     *     Inc. unless otherwise expressly agreed to in writing between Synopsys
     *     and you.
     *
     *     The Software IS NOT an item of Licensed Software or Licensed Product
     *     under any End User Software License Agreement or Agreement for Licensed
     *     Product with Synopsys or any supplement thereto.  Permission is hereby
     *     granted, free of charge, to any person obtaining a copy of this software
     *     annotated with this license and the Software, to deal in the Software
     *     without restriction, including without limitation the rights to use,
     *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
     *     of the Software, and to permit persons to whom the Software is furnished
     *     to do so, subject to the following conditions:
    *
    *     The above copyright notice and this permission notice shall be included
    *     in all copies or substantial portions of the Software.
    *
    *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
    *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
    *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
    *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
    *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
    *     THE POSSIBILITY OF SUCH DAMAGE.
    */
   #include <sys/cdefs.h>
   __FBSDID("$FreeBSD$");
   
   #include "xgbe.h"
   
   static u64 xgbe_cc_read(const struct cyclecounter *cc)
   {
           struct xgbe_prv_data *pdata = container_of(cc,
                                                      struct xgbe_prv_data,
                                                      tstamp_cc);
           u64 nsec;
   
           nsec = pdata->hw_if.get_tstamp_time(pdata);
   
           return (nsec);
   }
   
   static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta)
   {
           struct xgbe_prv_data *pdata = container_of(info,
                                                      struct xgbe_prv_data,
                                                      ptp_clock_info);
           unsigned long flags;
           u64 adjust;
           u32 addend, diff;
           unsigned int neg_adjust = 0;
   
           if (delta < 0) {
                   neg_adjust = 1;
                   delta = -delta;
           }
   
           adjust = pdata->tstamp_addend;
           adjust *= delta;
           diff = div_u64(adjust, 1000000000UL);
   
           addend = (neg_adjust) ? pdata->tstamp_addend - diff :
                                   pdata->tstamp_addend + diff;
   
           spin_lock_irqsave(&pdata->tstamp_lock, flags);
   
           pdata->hw_if.update_tstamp_addend(pdata, addend);
   
           spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
   
           return (0);
   }
   
   static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta)
   {
           struct xgbe_prv_data *pdata = container_of(info,
                                                      struct xgbe_prv_data,
                                                      ptp_clock_info);
           unsigned long flags;
   
           spin_lock_irqsave(&pdata->tstamp_lock, flags);
           timecounter_adjtime(&pdata->tstamp_tc, delta);
           spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
   
           return (0);
   }
   
   static int xgbe_gettime(struct ptp_clock_info *info, struct timespec64 *ts)
   {
           struct xgbe_prv_data *pdata = container_of(info,
                                                      struct xgbe_prv_data,
                                                      ptp_clock_info);
           unsigned long flags;
           u64 nsec;
   
           spin_lock_irqsave(&pdata->tstamp_lock, flags);
   
           nsec = timecounter_read(&pdata->tstamp_tc);
   
           spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
   
           *ts = ns_to_timespec64(nsec);
   
           return (0);
   }
   
   static int xgbe_settime(struct ptp_clock_info *info,
                           const struct timespec64 *ts)
   {
           struct xgbe_prv_data *pdata = container_of(info,
                                                      struct xgbe_prv_data,
                                                      ptp_clock_info);
           unsigned long flags;
           u64 nsec;
   
           nsec = timespec64_to_ns(ts);
   
           spin_lock_irqsave(&pdata->tstamp_lock, flags);
   
           timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec);
   
           spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
   
           return (0);
   }
   
   static int xgbe_enable(struct ptp_clock_info *info,
       void *request, int on)
   {
           return (-EOPNOTSUPP);
   }
   
   void xgbe_ptp_register(struct xgbe_prv_data *pdata)
   {
           struct ptp_clock_info *info = &pdata->ptp_clock_info;
           //struct ptp_clock *clock;
           struct cyclecounter *cc = &pdata->tstamp_cc;
           u64 dividend;
   
           snprintf(info->name, sizeof(info->name), "axgbe-ptp");
           //info->owner = THIS_MODULE;
           info->max_adj = pdata->ptpclk_rate;
           info->adjfreq = xgbe_adjfreq;
           info->adjtime = xgbe_adjtime;
           info->gettime64 = xgbe_gettime;
           info->settime64 = xgbe_settime;
           info->enable = xgbe_enable;
   #if 0
           clock = ptp_clock_register(info, pdata->dev);
           if (IS_ERR(clock)) {
                   dev_err(pdata->dev, "ptp_clock_register failed\n");
                   return;
           }
   
           pdata->ptp_clock = clock;
   #endif
           /* Calculate the addend:
            *   addend = 2^32 / (PTP ref clock / 50Mhz)
            *          = (2^32 * 50Mhz) / PTP ref clock
            */
           dividend = 50000000;
           dividend <<= 32;
           pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate);
   
           /* Setup the timecounter */
           cc->read = xgbe_cc_read;
           cc->mask = CLOCKSOURCE_MASK(64);
           cc->mult = 1;
           cc->shift = 0;
   
           timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc,
                            ktime_to_ns(ktime_get_real()));
   
           /* Disable all timestamping to start */
           XGMAC_IOWRITE(pdata, MAC_TSCR, 0);
           pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
           pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
   }
   
   void xgbe_ptp_unregister(struct xgbe_prv_data *pdata)
   {
   #if 0
           if (pdata->ptp_clock)
                   ptp_clock_unregister(pdata->ptp_clock);
   #endif
   }

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