2 * Userspace API for hardware time stamping of network packets
4 * Copyright (C) 2008,2009 Intel Corporation
9 #ifndef _NET_TIMESTAMPING_H
10 #define _NET_TIMESTAMPING_H
12 #include <linux/socket.h> /* for SO_TIMESTAMPING */
14 /* SO_TIMESTAMPING gets an integer bit field comprised of these values */
16 SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
17 SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1),
18 SOF_TIMESTAMPING_RX_HARDWARE = (1<<2),
19 SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3),
20 SOF_TIMESTAMPING_SOFTWARE = (1<<4),
21 SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5),
22 SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6),
23 SOF_TIMESTAMPING_OPT_ID = (1<<7),
24 SOF_TIMESTAMPING_TX_SCHED = (1<<8),
25 SOF_TIMESTAMPING_TX_ACK = (1<<9),
26 SOF_TIMESTAMPING_OPT_CMSG = (1<<10),
27 SOF_TIMESTAMPING_OPT_TSONLY = (1<<11),
29 SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TSONLY,
30 SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
35 * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
37 * @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP
38 * @tx_type: one of HWTSTAMP_TX_*
39 * @rx_filter: one of HWTSTAMP_FILTER_*
41 * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
42 * ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
43 * driver or hardware does not support the requested @rx_filter value,
44 * the driver may use a more general filter mode. In this case
45 * @rx_filter will indicate the actual mode on return.
47 struct hwtstamp_config {
53 /* possible values for hwtstamp_config->tx_type */
54 enum hwtstamp_tx_types {
56 * No outgoing packet will need hardware time stamping;
57 * should a packet arrive which asks for it, no hardware
58 * time stamping will be done.
63 * Enables hardware time stamping for outgoing packets;
64 * the sender of the packet decides which are to be
65 * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
66 * before sending the packet.
71 * Enables time stamping for outgoing packets just as
72 * HWTSTAMP_TX_ON does, but also enables time stamp insertion
73 * directly into Sync packets. In this case, transmitted Sync
74 * packets will not received a time stamp via the socket error
77 HWTSTAMP_TX_ONESTEP_SYNC,
80 /* possible values for hwtstamp_config->rx_filter */
81 enum hwtstamp_rx_filters {
82 /* time stamp no incoming packet at all */
85 /* time stamp any incoming packet */
88 /* return value: time stamp all packets requested plus some others */
91 /* PTP v1, UDP, any kind of event packet */
92 HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
93 /* PTP v1, UDP, Sync packet */
94 HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
95 /* PTP v1, UDP, Delay_req packet */
96 HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
97 /* PTP v2, UDP, any kind of event packet */
98 HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
99 /* PTP v2, UDP, Sync packet */
100 HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
101 /* PTP v2, UDP, Delay_req packet */
102 HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
104 /* 802.AS1, Ethernet, any kind of event packet */
105 HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
106 /* 802.AS1, Ethernet, Sync packet */
107 HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
108 /* 802.AS1, Ethernet, Delay_req packet */
109 HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
111 /* PTP v2/802.AS1, any layer, any kind of event packet */
112 HWTSTAMP_FILTER_PTP_V2_EVENT,
113 /* PTP v2/802.AS1, any layer, Sync packet */
114 HWTSTAMP_FILTER_PTP_V2_SYNC,
115 /* PTP v2/802.AS1, any layer, Delay_req packet */
116 HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
119 #endif /* _NET_TIMESTAMPING_H */