master
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/*
17 * Possible type of hwtstamp provider. Mainly "precise" the default one
18 * is for IEEE 1588 quality and "approx" is for NICs DMA point.
19 */
20enum hwtstamp_provider_qualifier {
21 HWTSTAMP_PROVIDER_QUALIFIER_PRECISE,
22 HWTSTAMP_PROVIDER_QUALIFIER_APPROX,
23
24 HWTSTAMP_PROVIDER_QUALIFIER_CNT,
25};
26
27/* SO_TIMESTAMPING flags */
28enum {
29 SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
30 SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1),
31 SOF_TIMESTAMPING_RX_HARDWARE = (1<<2),
32 SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3),
33 SOF_TIMESTAMPING_SOFTWARE = (1<<4),
34 SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5),
35 SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6),
36 SOF_TIMESTAMPING_OPT_ID = (1<<7),
37 SOF_TIMESTAMPING_TX_SCHED = (1<<8),
38 SOF_TIMESTAMPING_TX_ACK = (1<<9),
39 SOF_TIMESTAMPING_OPT_CMSG = (1<<10),
40 SOF_TIMESTAMPING_OPT_TSONLY = (1<<11),
41 SOF_TIMESTAMPING_OPT_STATS = (1<<12),
42 SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13),
43 SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14),
44 SOF_TIMESTAMPING_BIND_PHC = (1 << 15),
45 SOF_TIMESTAMPING_OPT_ID_TCP = (1 << 16),
46 SOF_TIMESTAMPING_OPT_RX_FILTER = (1 << 17),
47 SOF_TIMESTAMPING_TX_COMPLETION = (1 << 18),
48
49 SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_TX_COMPLETION,
50 SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
51 SOF_TIMESTAMPING_LAST
52};
53
54/*
55 * SO_TIMESTAMPING flags are either for recording a packet timestamp or for
56 * reporting the timestamp to user space.
57 * Recording flags can be set both via socket options and control messages.
58 */
59#define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \
60 SOF_TIMESTAMPING_TX_SOFTWARE | \
61 SOF_TIMESTAMPING_TX_SCHED | \
62 SOF_TIMESTAMPING_TX_ACK | \
63 SOF_TIMESTAMPING_TX_COMPLETION)
64
65/**
66 * struct so_timestamping - SO_TIMESTAMPING parameter
67 *
68 * @flags: SO_TIMESTAMPING flags
69 * @bind_phc: Index of PTP virtual clock bound to sock. This is available
70 * if flag SOF_TIMESTAMPING_BIND_PHC is set.
71 */
72struct so_timestamping {
73 int flags;
74 int bind_phc;
75};
76
77/**
78 * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
79 *
80 * @flags: one of HWTSTAMP_FLAG_*
81 * @tx_type: one of HWTSTAMP_TX_*
82 * @rx_filter: one of HWTSTAMP_FILTER_*
83 *
84 * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
85 * ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
86 * driver or hardware does not support the requested @rx_filter value,
87 * the driver may use a more general filter mode. In this case
88 * @rx_filter will indicate the actual mode on return.
89 */
90struct hwtstamp_config {
91 int flags;
92 int tx_type;
93 int rx_filter;
94};
95
96/* possible values for hwtstamp_config->flags */
97enum hwtstamp_flags {
98 /*
99 * With this flag, the user could get bond active interface's
100 * PHC index. Note this PHC index is not stable as when there
101 * is a failover, the bond active interface will be changed, so
102 * will be the PHC index.
103 */
104 HWTSTAMP_FLAG_BONDED_PHC_INDEX = (1<<0),
105#define HWTSTAMP_FLAG_BONDED_PHC_INDEX HWTSTAMP_FLAG_BONDED_PHC_INDEX
106
107 HWTSTAMP_FLAG_LAST = HWTSTAMP_FLAG_BONDED_PHC_INDEX,
108 HWTSTAMP_FLAG_MASK = (HWTSTAMP_FLAG_LAST - 1) | HWTSTAMP_FLAG_LAST
109};
110
111/* possible values for hwtstamp_config->tx_type */
112enum hwtstamp_tx_types {
113 /*
114 * No outgoing packet will need hardware time stamping;
115 * should a packet arrive which asks for it, no hardware
116 * time stamping will be done.
117 */
118 HWTSTAMP_TX_OFF,
119
120 /*
121 * Enables hardware time stamping for outgoing packets;
122 * the sender of the packet decides which are to be
123 * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
124 * before sending the packet.
125 */
126 HWTSTAMP_TX_ON,
127
128 /*
129 * Enables time stamping for outgoing packets just as
130 * HWTSTAMP_TX_ON does, but also enables time stamp insertion
131 * directly into Sync packets. In this case, transmitted Sync
132 * packets will not received a time stamp via the socket error
133 * queue.
134 */
135 HWTSTAMP_TX_ONESTEP_SYNC,
136
137 /*
138 * Same as HWTSTAMP_TX_ONESTEP_SYNC, but also enables time
139 * stamp insertion directly into PDelay_Resp packets. In this
140 * case, neither transmitted Sync nor PDelay_Resp packets will
141 * receive a time stamp via the socket error queue.
142 */
143 HWTSTAMP_TX_ONESTEP_P2P,
144
145 /* add new constants above here */
146 __HWTSTAMP_TX_CNT
147};
148
149/* possible values for hwtstamp_config->rx_filter */
150enum hwtstamp_rx_filters {
151 /* time stamp no incoming packet at all */
152 HWTSTAMP_FILTER_NONE,
153
154 /* time stamp any incoming packet */
155 HWTSTAMP_FILTER_ALL,
156
157 /* return value: time stamp all packets requested plus some others */
158 HWTSTAMP_FILTER_SOME,
159
160 /* PTP v1, UDP, any kind of event packet */
161 HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
162 /* PTP v1, UDP, Sync packet */
163 HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
164 /* PTP v1, UDP, Delay_req packet */
165 HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
166 /* PTP v2, UDP, any kind of event packet */
167 HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
168 /* PTP v2, UDP, Sync packet */
169 HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
170 /* PTP v2, UDP, Delay_req packet */
171 HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
172
173 /* 802.AS1, Ethernet, any kind of event packet */
174 HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
175 /* 802.AS1, Ethernet, Sync packet */
176 HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
177 /* 802.AS1, Ethernet, Delay_req packet */
178 HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
179
180 /* PTP v2/802.AS1, any layer, any kind of event packet */
181 HWTSTAMP_FILTER_PTP_V2_EVENT,
182 /* PTP v2/802.AS1, any layer, Sync packet */
183 HWTSTAMP_FILTER_PTP_V2_SYNC,
184 /* PTP v2/802.AS1, any layer, Delay_req packet */
185 HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
186
187 /* NTP, UDP, all versions and packet modes */
188 HWTSTAMP_FILTER_NTP_ALL,
189
190 /* add new constants above here */
191 __HWTSTAMP_FILTER_CNT
192};
193
194/* SCM_TIMESTAMPING_PKTINFO control message */
195struct scm_ts_pktinfo {
196 __u32 if_index;
197 __u32 pkt_length;
198 __u32 reserved[2];
199};
200
201/*
202 * SO_TXTIME gets a struct sock_txtime with flags being an integer bit
203 * field comprised of these values.
204 */
205enum txtime_flags {
206 SOF_TXTIME_DEADLINE_MODE = (1 << 0),
207 SOF_TXTIME_REPORT_ERRORS = (1 << 1),
208
209 SOF_TXTIME_FLAGS_LAST = SOF_TXTIME_REPORT_ERRORS,
210 SOF_TXTIME_FLAGS_MASK = (SOF_TXTIME_FLAGS_LAST - 1) |
211 SOF_TXTIME_FLAGS_LAST
212};
213
214struct sock_txtime {
215 __kernel_clockid_t clockid;/* reference clockid */
216 __u32 flags; /* as defined by enum txtime_flags */
217};
218
219#endif /* _NET_TIMESTAMPING_H */