2 * Userspace API for hardware time stamping of network packets
4 * Copyright (C) 2008,2009 Intel Corporation
5 * Author: Patrick Ohly <patrick.ohly@intel.com>
9 #ifndef _NET_TIMESTAMPING_H
10 #define _NET_TIMESTAMPING_H
12 #include <linux/types.h>
13 #include <linux/socket.h> /* for SO_TIMESTAMPING */
15 /* SO_TIMESTAMPING gets an integer bit field comprised of these values */
17 SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
18 SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1),
19 SOF_TIMESTAMPING_RX_HARDWARE = (1<<2),
20 SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3),
21 SOF_TIMESTAMPING_SOFTWARE = (1<<4),
22 SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5),
23 SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6),
24 SOF_TIMESTAMPING_OPT_ID = (1<<7),
25 SOF_TIMESTAMPING_TX_SCHED = (1<<8),
26 SOF_TIMESTAMPING_TX_ACK = (1<<9),
27 SOF_TIMESTAMPING_OPT_CMSG = (1<<10),
28 SOF_TIMESTAMPING_OPT_TSONLY = (1<<11),
29 SOF_TIMESTAMPING_OPT_STATS = (1<<12),
30 SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13),
32 SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_PKTINFO,
33 SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
38 * SO_TIMESTAMPING flags are either for recording a packet timestamp or for
39 * reporting the timestamp to user space.
40 * Recording flags can be set both via socket options and control messages.
42 #define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \
43 SOF_TIMESTAMPING_TX_SOFTWARE | \
44 SOF_TIMESTAMPING_TX_SCHED | \
45 SOF_TIMESTAMPING_TX_ACK)
48 * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
50 * @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP
51 * @tx_type: one of HWTSTAMP_TX_*
52 * @rx_filter: one of HWTSTAMP_FILTER_*
54 * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
55 * ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
56 * driver or hardware does not support the requested @rx_filter value,
57 * the driver may use a more general filter mode. In this case
58 * @rx_filter will indicate the actual mode on return.
60 struct hwtstamp_config {
66 /* possible values for hwtstamp_config->tx_type */
67 enum hwtstamp_tx_types {
69 * No outgoing packet will need hardware time stamping;
70 * should a packet arrive which asks for it, no hardware
71 * time stamping will be done.
76 * Enables hardware time stamping for outgoing packets;
77 * the sender of the packet decides which are to be
78 * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
79 * before sending the packet.
84 * Enables time stamping for outgoing packets just as
85 * HWTSTAMP_TX_ON does, but also enables time stamp insertion
86 * directly into Sync packets. In this case, transmitted Sync
87 * packets will not received a time stamp via the socket error
90 HWTSTAMP_TX_ONESTEP_SYNC,
93 /* possible values for hwtstamp_config->rx_filter */
94 enum hwtstamp_rx_filters {
95 /* time stamp no incoming packet at all */
98 /* time stamp any incoming packet */
101 /* return value: time stamp all packets requested plus some others */
102 HWTSTAMP_FILTER_SOME,
104 /* PTP v1, UDP, any kind of event packet */
105 HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
106 /* PTP v1, UDP, Sync packet */
107 HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
108 /* PTP v1, UDP, Delay_req packet */
109 HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
110 /* PTP v2, UDP, any kind of event packet */
111 HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
112 /* PTP v2, UDP, Sync packet */
113 HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
114 /* PTP v2, UDP, Delay_req packet */
115 HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
117 /* 802.AS1, Ethernet, any kind of event packet */
118 HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
119 /* 802.AS1, Ethernet, Sync packet */
120 HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
121 /* 802.AS1, Ethernet, Delay_req packet */
122 HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
124 /* PTP v2/802.AS1, any layer, any kind of event packet */
125 HWTSTAMP_FILTER_PTP_V2_EVENT,
126 /* PTP v2/802.AS1, any layer, Sync packet */
127 HWTSTAMP_FILTER_PTP_V2_SYNC,
128 /* PTP v2/802.AS1, any layer, Delay_req packet */
129 HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
131 /* NTP, UDP, all versions and packet modes */
132 HWTSTAMP_FILTER_NTP_ALL,
135 /* SCM_TIMESTAMPING_PKTINFO control message */
136 struct scm_ts_pktinfo {
142 #endif /* _NET_TIMESTAMPING_H */