285 lines
10 KiB
C
285 lines
10 KiB
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 <linux/clk.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/ptp_clock_kernel.h>
|
|
#include <linux/net_tstamp.h>
|
|
|
|
#include "xgbe.h"
|
|
#include "xgbe-common.h"
|
|
|
|
static cycle_t 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;
|
|
u64 nsec;
|
|
|
|
spin_lock_irqsave(&pdata->tstamp_lock, flags);
|
|
|
|
nsec = timecounter_read(&pdata->tstamp_tc);
|
|
|
|
nsec += delta;
|
|
timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec);
|
|
|
|
spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xgbe_gettime(struct ptp_clock_info *info, struct timespec *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_timespec(nsec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xgbe_settime(struct ptp_clock_info *info, const struct timespec *ts)
|
|
{
|
|
struct xgbe_prv_data *pdata = container_of(info,
|
|
struct xgbe_prv_data,
|
|
ptp_clock_info);
|
|
unsigned long flags;
|
|
u64 nsec;
|
|
|
|
nsec = timespec_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,
|
|
struct ptp_clock_request *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), "%s",
|
|
netdev_name(pdata->netdev));
|
|
info->owner = THIS_MODULE;
|
|
info->max_adj = clk_get_rate(pdata->ptpclk);
|
|
info->adjfreq = xgbe_adjfreq;
|
|
info->adjtime = xgbe_adjtime;
|
|
info->gettime = xgbe_gettime;
|
|
info->settime = xgbe_settime;
|
|
info->enable = xgbe_enable;
|
|
|
|
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;
|
|
|
|
/* 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, clk_get_rate(pdata->ptpclk));
|
|
|
|
/* 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_TCR, 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 (pdata->ptp_clock)
|
|
ptp_clock_unregister(pdata->ptp_clock);
|
|
}
|