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34a07c5b25
Use SPDX-License-Identifier accross all the files of the xgbe driver to ensure compliance with Linux kernel standards, thus removing the boiler-plate template license text. Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com> Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20250407102913.3063691-1-Raju.Rangoju@amd.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
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/*
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* Copyright (c) 2014-2025, Advanced Micro Devices, Inc.
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* Copyright (c) 2014, Synopsys, Inc.
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* All rights reserved
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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_adjfine(struct ptp_clock_info *info, long scaled_ppm)
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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 addend;
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addend = adjust_by_scaled_ppm(pdata->tstamp_addend, scaled_ppm);
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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->adjfine = xgbe_adjfine;
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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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