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/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),
25 SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_ID,
26 SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
31 * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
33 * @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP
34 * @tx_type: one of HWTSTAMP_TX_*
35 * @rx_filter: one of HWTSTAMP_FILTER_*
37 * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
38 * ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
39 * driver or hardware does not support the requested @rx_filter value,
40 * the driver may use a more general filter mode. In this case
41 * @rx_filter will indicate the actual mode on return.
43 struct hwtstamp_config {
49 /* possible values for hwtstamp_config->tx_type */
50 enum hwtstamp_tx_types {
52 * No outgoing packet will need hardware time stamping;
53 * should a packet arrive which asks for it, no hardware
54 * time stamping will be done.
59 * Enables hardware time stamping for outgoing packets;
60 * the sender of the packet decides which are to be
61 * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
62 * before sending the packet.
67 * Enables time stamping for outgoing packets just as
68 * HWTSTAMP_TX_ON does, but also enables time stamp insertion
69 * directly into Sync packets. In this case, transmitted Sync
70 * packets will not received a time stamp via the socket error
73 HWTSTAMP_TX_ONESTEP_SYNC,
76 /* possible values for hwtstamp_config->rx_filter */
77 enum hwtstamp_rx_filters {
78 /* time stamp no incoming packet at all */
81 /* time stamp any incoming packet */
84 /* return value: time stamp all packets requested plus some others */
87 /* PTP v1, UDP, any kind of event packet */
88 HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
89 /* PTP v1, UDP, Sync packet */
90 HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
91 /* PTP v1, UDP, Delay_req packet */
92 HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
93 /* PTP v2, UDP, any kind of event packet */
94 HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
95 /* PTP v2, UDP, Sync packet */
96 HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
97 /* PTP v2, UDP, Delay_req packet */
98 HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
100 /* 802.AS1, Ethernet, any kind of event packet */
101 HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
102 /* 802.AS1, Ethernet, Sync packet */
103 HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
104 /* 802.AS1, Ethernet, Delay_req packet */
105 HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
107 /* PTP v2/802.AS1, any layer, any kind of event packet */
108 HWTSTAMP_FILTER_PTP_V2_EVENT,
109 /* PTP v2/802.AS1, any layer, Sync packet */
110 HWTSTAMP_FILTER_PTP_V2_SYNC,
111 /* PTP v2/802.AS1, any layer, Delay_req packet */
112 HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
115 #endif /* _NET_TIMESTAMPING_H */