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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
2 * AMD 10Gb Ethernet driver
4 * This file is available to you under your choice of the following two
9 * Copyright (c) 2014 Advanced Micro Devices, Inc.
11 * This file is free software; you may copy, redistribute and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 2 of the License, or (at
14 * your option) any later version.
16 * This file is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * This file incorporates work covered by the following copyright and
26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation
27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
28 * Inc. unless otherwise expressly agreed to in writing between Synopsys
31 * The Software IS NOT an item of Licensed Software or Licensed Product
32 * under any End User Software License Agreement or Agreement for Licensed
33 * Product with Synopsys or any supplement thereto. Permission is hereby
34 * granted, free of charge, to any person obtaining a copy of this software
35 * annotated with this license and the Software, to deal in the Software
36 * without restriction, including without limitation the rights to use,
37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
38 * of the Software, and to permit persons to whom the Software is furnished
39 * to do so, subject to the following conditions:
41 * The above copyright notice and this permission notice shall be included
42 * in all copies or substantial portions of the Software.
44 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
45 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
54 * THE POSSIBILITY OF SUCH DAMAGE.
57 * License 2: Modified BSD
59 * Copyright (c) 2014 Advanced Micro Devices, Inc.
60 * All rights reserved.
62 * Redistribution and use in source and binary forms, with or without
63 * modification, are permitted provided that the following conditions are met:
64 * * Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
66 * * Redistributions in binary form must reproduce the above copyright
67 * notice, this list of conditions and the following disclaimer in the
68 * documentation and/or other materials provided with the distribution.
69 * * Neither the name of Advanced Micro Devices, Inc. nor the
70 * names of its contributors may be used to endorse or promote products
71 * derived from this software without specific prior written permission.
73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
74 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
84 * This file incorporates work covered by the following copyright and
86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation
87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
88 * Inc. unless otherwise expressly agreed to in writing between Synopsys
91 * The Software IS NOT an item of Licensed Software or Licensed Product
92 * under any End User Software License Agreement or Agreement for Licensed
93 * Product with Synopsys or any supplement thereto. Permission is hereby
94 * granted, free of charge, to any person obtaining a copy of this software
95 * annotated with this license and the Software, to deal in the Software
96 * without restriction, including without limitation the rights to use,
97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
98 * of the Software, and to permit persons to whom the Software is furnished
99 * to do so, subject to the following conditions:
101 * The above copyright notice and this permission notice shall be included
102 * in all copies or substantial portions of the Software.
104 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
105 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
114 * THE POSSIBILITY OF SUCH DAMAGE.
117 #include <linux/clk.h>
118 #include <linux/clocksource.h>
119 #include <linux/ptp_clock_kernel.h>
120 #include <linux/net_tstamp.h>
123 #include "xgbe-common.h"
125 static cycle_t
xgbe_cc_read(const struct cyclecounter
*cc
)
127 struct xgbe_prv_data
*pdata
= container_of(cc
,
128 struct xgbe_prv_data
,
132 nsec
= pdata
->hw_if
.get_tstamp_time(pdata
);
137 static int xgbe_adjfreq(struct ptp_clock_info
*info
, s32 delta
)
139 struct xgbe_prv_data
*pdata
= container_of(info
,
140 struct xgbe_prv_data
,
145 unsigned int neg_adjust
= 0;
152 adjust
= pdata
->tstamp_addend
;
154 diff
= div_u64(adjust
, 1000000000UL);
156 addend
= (neg_adjust
) ? pdata
->tstamp_addend
- diff
:
157 pdata
->tstamp_addend
+ diff
;
159 spin_lock_irqsave(&pdata
->tstamp_lock
, flags
);
161 pdata
->hw_if
.update_tstamp_addend(pdata
, addend
);
163 spin_unlock_irqrestore(&pdata
->tstamp_lock
, flags
);
168 static int xgbe_adjtime(struct ptp_clock_info
*info
, s64 delta
)
170 struct xgbe_prv_data
*pdata
= container_of(info
,
171 struct xgbe_prv_data
,
175 spin_lock_irqsave(&pdata
->tstamp_lock
, flags
);
176 timecounter_adjtime(&pdata
->tstamp_tc
, delta
);
177 spin_unlock_irqrestore(&pdata
->tstamp_lock
, flags
);
182 static int xgbe_gettime(struct ptp_clock_info
*info
, struct timespec64
*ts
)
184 struct xgbe_prv_data
*pdata
= container_of(info
,
185 struct xgbe_prv_data
,
190 spin_lock_irqsave(&pdata
->tstamp_lock
, flags
);
192 nsec
= timecounter_read(&pdata
->tstamp_tc
);
194 spin_unlock_irqrestore(&pdata
->tstamp_lock
, flags
);
196 *ts
= ns_to_timespec64(nsec
);
201 static int xgbe_settime(struct ptp_clock_info
*info
,
202 const struct timespec64
*ts
)
204 struct xgbe_prv_data
*pdata
= container_of(info
,
205 struct xgbe_prv_data
,
210 nsec
= timespec64_to_ns(ts
);
212 spin_lock_irqsave(&pdata
->tstamp_lock
, flags
);
214 timecounter_init(&pdata
->tstamp_tc
, &pdata
->tstamp_cc
, nsec
);
216 spin_unlock_irqrestore(&pdata
->tstamp_lock
, flags
);
221 static int xgbe_enable(struct ptp_clock_info
*info
,
222 struct ptp_clock_request
*request
, int on
)
227 void xgbe_ptp_register(struct xgbe_prv_data
*pdata
)
229 struct ptp_clock_info
*info
= &pdata
->ptp_clock_info
;
230 struct ptp_clock
*clock
;
231 struct cyclecounter
*cc
= &pdata
->tstamp_cc
;
234 snprintf(info
->name
, sizeof(info
->name
), "%s",
235 netdev_name(pdata
->netdev
));
236 info
->owner
= THIS_MODULE
;
237 info
->max_adj
= pdata
->ptpclk_rate
;
238 info
->adjfreq
= xgbe_adjfreq
;
239 info
->adjtime
= xgbe_adjtime
;
240 info
->gettime64
= xgbe_gettime
;
241 info
->settime64
= xgbe_settime
;
242 info
->enable
= xgbe_enable
;
244 clock
= ptp_clock_register(info
, pdata
->dev
);
246 dev_err(pdata
->dev
, "ptp_clock_register failed\n");
250 pdata
->ptp_clock
= clock
;
252 /* Calculate the addend:
253 * addend = 2^32 / (PTP ref clock / 50Mhz)
254 * = (2^32 * 50Mhz) / PTP ref clock
258 pdata
->tstamp_addend
= div_u64(dividend
, pdata
->ptpclk_rate
);
260 /* Setup the timecounter */
261 cc
->read
= xgbe_cc_read
;
262 cc
->mask
= CLOCKSOURCE_MASK(64);
266 timecounter_init(&pdata
->tstamp_tc
, &pdata
->tstamp_cc
,
267 ktime_to_ns(ktime_get_real()));
269 /* Disable all timestamping to start */
270 XGMAC_IOWRITE(pdata
, MAC_TCR
, 0);
271 pdata
->tstamp_config
.tx_type
= HWTSTAMP_TX_OFF
;
272 pdata
->tstamp_config
.rx_filter
= HWTSTAMP_FILTER_NONE
;
275 void xgbe_ptp_unregister(struct xgbe_prv_data
*pdata
)
277 if (pdata
->ptp_clock
)
278 ptp_clock_unregister(pdata
->ptp_clock
);