--- /dev/null
+/*
+ * 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;
+
+ 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,
+ 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 = pdata->ptpclk_rate;
+ info->adjfreq = xgbe_adjfreq;
+ info->adjtime = xgbe_adjtime;
+ info->gettime64 = xgbe_gettime;
+ info->settime64 = 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, 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_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);
+}
Code Review / kvmfornfv.git / blobdiff