1 /*
2  * This file is part of the Chelsio T4 Ethernet driver for Linux.
3  *
4  * Copyright (c) 2003-2017 Chelsio Communications, Inc. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #ifndef __CXGB4_PTP_H__
36 #define __CXGB4_PTP_H__
37 
38 /* Maximum parts-per-billion adjustment that is acceptable */
39 #define MAX_PTP_FREQ_ADJ		1000000
40 #define PTP_CLOCK_MAX_ADJTIME		10000000 /* 10 ms */
41 
42 #define PTP_MIN_LENGTH			63
43 #define PTP_IN_TRANSMIT_PACKET_MAXNUM	240
44 #define PTP_EVENT_PORT			319
45 
46 enum ptp_rx_filter_mode {
47 	PTP_TS_NONE = 0,
48 	PTP_TS_L2,
49 	PTP_TS_L4,
50 	PTP_TS_L2_L4
51 };
52 
53 struct port_info;
54 
55 static inline bool cxgb4_xmit_with_hwtstamp(struct sk_buff *skb)
56 {
57 	return skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP;
58 }
59 
60 static inline void cxgb4_xmit_hwtstamp_pending(struct sk_buff *skb)
61 {
62 	skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
63 }
64 
65 void cxgb4_ptp_init(struct adapter *adap);
66 void cxgb4_ptp_stop(struct adapter *adap);
67 bool cxgb4_ptp_is_ptp_tx(struct sk_buff *skb);
68 bool cxgb4_ptp_is_ptp_rx(struct sk_buff *skb);
69 int cxgb4_ptprx_timestamping(struct port_info *pi, u8 port, u16 mode);
70 int cxgb4_ptp_redirect_rx_packet(struct adapter *adap, struct port_info *pi);
71 int cxgb4_ptp_txtype(struct adapter *adap, u8 port_id);
72 void cxgb4_ptp_read_hwstamp(struct adapter *adap, struct port_info *pi);
73 bool is_ptp_enabled(struct sk_buff *skb, struct net_device *dev);
74 #endif /* __CXGB4_PTP_H__ */
75