1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  * Userspace API for hardware time stamping of network packets
4  *
5  * Copyright (C) 2008,2009 Intel Corporation
6  * Author: Patrick Ohly <patrick.ohly@intel.com>
7  *
8  */
9 
10 #ifndef _NET_TIMESTAMPING_H
11 #define _NET_TIMESTAMPING_H
12 
13 #include <linux/types.h>
14 #include <linux/socket.h>   /* for SO_TIMESTAMPING */
15 
16 /* SO_TIMESTAMPING flags */
17 enum {
18 	SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
19 	SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1),
20 	SOF_TIMESTAMPING_RX_HARDWARE = (1<<2),
21 	SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3),
22 	SOF_TIMESTAMPING_SOFTWARE = (1<<4),
23 	SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5),
24 	SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6),
25 	SOF_TIMESTAMPING_OPT_ID = (1<<7),
26 	SOF_TIMESTAMPING_TX_SCHED = (1<<8),
27 	SOF_TIMESTAMPING_TX_ACK = (1<<9),
28 	SOF_TIMESTAMPING_OPT_CMSG = (1<<10),
29 	SOF_TIMESTAMPING_OPT_TSONLY = (1<<11),
30 	SOF_TIMESTAMPING_OPT_STATS = (1<<12),
31 	SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13),
32 	SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14),
33 	SOF_TIMESTAMPING_BIND_PHC = (1 << 15),
34 	SOF_TIMESTAMPING_OPT_ID_TCP = (1 << 16),
35 
36 	SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_ID_TCP,
37 	SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
38 				 SOF_TIMESTAMPING_LAST
39 };
40 
41 /*
42  * SO_TIMESTAMPING flags are either for recording a packet timestamp or for
43  * reporting the timestamp to user space.
44  * Recording flags can be set both via socket options and control messages.
45  */
46 #define SOF_TIMESTAMPING_TX_RECORD_MASK	(SOF_TIMESTAMPING_TX_HARDWARE | \
47 					 SOF_TIMESTAMPING_TX_SOFTWARE | \
48 					 SOF_TIMESTAMPING_TX_SCHED | \
49 					 SOF_TIMESTAMPING_TX_ACK)
50 
51 /**
52  * struct so_timestamping - SO_TIMESTAMPING parameter
53  *
54  * @flags:	SO_TIMESTAMPING flags
55  * @bind_phc:	Index of PTP virtual clock bound to sock. This is available
56  *		if flag SOF_TIMESTAMPING_BIND_PHC is set.
57  */
58 struct so_timestamping {
59 	int flags;
60 	int bind_phc;
61 };
62 
63 /**
64  * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
65  *
66  * @flags:	one of HWTSTAMP_FLAG_*
67  * @tx_type:	one of HWTSTAMP_TX_*
68  * @rx_filter:	one of HWTSTAMP_FILTER_*
69  *
70  * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
71  * ifr_data pointer to this structure.  For %SIOCSHWTSTAMP, if the
72  * driver or hardware does not support the requested @rx_filter value,
73  * the driver may use a more general filter mode.  In this case
74  * @rx_filter will indicate the actual mode on return.
75  */
76 struct hwtstamp_config {
77 	int flags;
78 	int tx_type;
79 	int rx_filter;
80 };
81 
82 /* possible values for hwtstamp_config->flags */
83 enum hwtstamp_flags {
84 	/*
85 	 * With this flag, the user could get bond active interface's
86 	 * PHC index. Note this PHC index is not stable as when there
87 	 * is a failover, the bond active interface will be changed, so
88 	 * will be the PHC index.
89 	 */
90 	HWTSTAMP_FLAG_BONDED_PHC_INDEX = (1<<0),
91 #define HWTSTAMP_FLAG_BONDED_PHC_INDEX	HWTSTAMP_FLAG_BONDED_PHC_INDEX
92 
93 	HWTSTAMP_FLAG_LAST = HWTSTAMP_FLAG_BONDED_PHC_INDEX,
94 	HWTSTAMP_FLAG_MASK = (HWTSTAMP_FLAG_LAST - 1) | HWTSTAMP_FLAG_LAST
95 };
96 
97 /* possible values for hwtstamp_config->tx_type */
98 enum hwtstamp_tx_types {
99 	/*
100 	 * No outgoing packet will need hardware time stamping;
101 	 * should a packet arrive which asks for it, no hardware
102 	 * time stamping will be done.
103 	 */
104 	HWTSTAMP_TX_OFF,
105 
106 	/*
107 	 * Enables hardware time stamping for outgoing packets;
108 	 * the sender of the packet decides which are to be
109 	 * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
110 	 * before sending the packet.
111 	 */
112 	HWTSTAMP_TX_ON,
113 
114 	/*
115 	 * Enables time stamping for outgoing packets just as
116 	 * HWTSTAMP_TX_ON does, but also enables time stamp insertion
117 	 * directly into Sync packets. In this case, transmitted Sync
118 	 * packets will not received a time stamp via the socket error
119 	 * queue.
120 	 */
121 	HWTSTAMP_TX_ONESTEP_SYNC,
122 
123 	/*
124 	 * Same as HWTSTAMP_TX_ONESTEP_SYNC, but also enables time
125 	 * stamp insertion directly into PDelay_Resp packets. In this
126 	 * case, neither transmitted Sync nor PDelay_Resp packets will
127 	 * receive a time stamp via the socket error queue.
128 	 */
129 	HWTSTAMP_TX_ONESTEP_P2P,
130 
131 	/* add new constants above here */
132 	__HWTSTAMP_TX_CNT
133 };
134 
135 /* possible values for hwtstamp_config->rx_filter */
136 enum hwtstamp_rx_filters {
137 	/* time stamp no incoming packet at all */
138 	HWTSTAMP_FILTER_NONE,
139 
140 	/* time stamp any incoming packet */
141 	HWTSTAMP_FILTER_ALL,
142 
143 	/* return value: time stamp all packets requested plus some others */
144 	HWTSTAMP_FILTER_SOME,
145 
146 	/* PTP v1, UDP, any kind of event packet */
147 	HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
148 	/* PTP v1, UDP, Sync packet */
149 	HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
150 	/* PTP v1, UDP, Delay_req packet */
151 	HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
152 	/* PTP v2, UDP, any kind of event packet */
153 	HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
154 	/* PTP v2, UDP, Sync packet */
155 	HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
156 	/* PTP v2, UDP, Delay_req packet */
157 	HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
158 
159 	/* 802.AS1, Ethernet, any kind of event packet */
160 	HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
161 	/* 802.AS1, Ethernet, Sync packet */
162 	HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
163 	/* 802.AS1, Ethernet, Delay_req packet */
164 	HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
165 
166 	/* PTP v2/802.AS1, any layer, any kind of event packet */
167 	HWTSTAMP_FILTER_PTP_V2_EVENT,
168 	/* PTP v2/802.AS1, any layer, Sync packet */
169 	HWTSTAMP_FILTER_PTP_V2_SYNC,
170 	/* PTP v2/802.AS1, any layer, Delay_req packet */
171 	HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
172 
173 	/* NTP, UDP, all versions and packet modes */
174 	HWTSTAMP_FILTER_NTP_ALL,
175 
176 	/* add new constants above here */
177 	__HWTSTAMP_FILTER_CNT
178 };
179 
180 /* SCM_TIMESTAMPING_PKTINFO control message */
181 struct scm_ts_pktinfo {
182 	__u32 if_index;
183 	__u32 pkt_length;
184 	__u32 reserved[2];
185 };
186 
187 /*
188  * SO_TXTIME gets a struct sock_txtime with flags being an integer bit
189  * field comprised of these values.
190  */
191 enum txtime_flags {
192 	SOF_TXTIME_DEADLINE_MODE = (1 << 0),
193 	SOF_TXTIME_REPORT_ERRORS = (1 << 1),
194 
195 	SOF_TXTIME_FLAGS_LAST = SOF_TXTIME_REPORT_ERRORS,
196 	SOF_TXTIME_FLAGS_MASK = (SOF_TXTIME_FLAGS_LAST - 1) |
197 				 SOF_TXTIME_FLAGS_LAST
198 };
199 
200 struct sock_txtime {
201 	__kernel_clockid_t	clockid;/* reference clockid */
202 	__u32			flags;	/* as defined by enum txtime_flags */
203 };
204 
205 #endif /* _NET_TIMESTAMPING_H */
206