include/uapi/linux/net_tstamp.h

   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 gets an integer bit field comprised of these values */
  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
  34         SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TX_SWHW,
  35         SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
  36                                  SOF_TIMESTAMPING_LAST
  37 };
  38
  39 /*
  40  * SO_TIMESTAMPING flags are either for recording a packet timestamp or for
  41  * reporting the timestamp to user space.
  42  * Recording flags can be set both via socket options and control messages.
  43  */
  44 #define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \
  45                                          SOF_TIMESTAMPING_TX_SOFTWARE | \
  46                                          SOF_TIMESTAMPING_TX_SCHED | \
  47                                          SOF_TIMESTAMPING_TX_ACK)
  48
  49 /**
  50  * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
  51  *
  52  * @flags:      no flags defined right now, must be zero for %SIOCSHWTSTAMP
  53  * @tx_type:    one of HWTSTAMP_TX_*
  54  * @rx_filter:  one of HWTSTAMP_FILTER_*
  55  *
  56  * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
  57  * ifr_data pointer to this structure.  For %SIOCSHWTSTAMP, if the
  58  * driver or hardware does not support the requested @rx_filter value,
  59  * the driver may use a more general filter mode.  In this case
  60  * @rx_filter will indicate the actual mode on return.
  61  */
  62 struct hwtstamp_config {
  63         int flags;
  64         int tx_type;
  65         int rx_filter;
  66 };
  67
  68 /* possible values for hwtstamp_config->tx_type */
  69 enum hwtstamp_tx_types {
  70         /*
  71          * No outgoing packet will need hardware time stamping;
  72          * should a packet arrive which asks for it, no hardware
  73          * time stamping will be done.
  74          */
  75         HWTSTAMP_TX_OFF,
  76
  77         /*
  78          * Enables hardware time stamping for outgoing packets;
  79          * the sender of the packet decides which are to be
  80          * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
  81          * before sending the packet.
  82          */
  83         HWTSTAMP_TX_ON,
  84
  85         /*
  86          * Enables time stamping for outgoing packets just as
  87          * HWTSTAMP_TX_ON does, but also enables time stamp insertion
  88          * directly into Sync packets. In this case, transmitted Sync
  89          * packets will not received a time stamp via the socket error
  90          * queue.
  91          */
  92         HWTSTAMP_TX_ONESTEP_SYNC,
  93 };
  94
  95 /* possible values for hwtstamp_config->rx_filter */
  96 enum hwtstamp_rx_filters {
  97         /* time stamp no incoming packet at all */
  98         HWTSTAMP_FILTER_NONE,
  99
 100         /* time stamp any incoming packet */
 101         HWTSTAMP_FILTER_ALL,
 102
 103         /* return value: time stamp all packets requested plus some others */
 104         HWTSTAMP_FILTER_SOME,
 105
 106         /* PTP v1, UDP, any kind of event packet */
 107         HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
 108         /* PTP v1, UDP, Sync packet */
 109         HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
 110         /* PTP v1, UDP, Delay_req packet */
 111         HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
 112         /* PTP v2, UDP, any kind of event packet */
 113         HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
 114         /* PTP v2, UDP, Sync packet */
 115         HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
 116         /* PTP v2, UDP, Delay_req packet */
 117         HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
 118
 119         /* 802.AS1, Ethernet, any kind of event packet */
 120         HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
 121         /* 802.AS1, Ethernet, Sync packet */
 122         HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
 123         /* 802.AS1, Ethernet, Delay_req packet */
 124         HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
 125
 126         /* PTP v2/802.AS1, any layer, any kind of event packet */
 127         HWTSTAMP_FILTER_PTP_V2_EVENT,
 128         /* PTP v2/802.AS1, any layer, Sync packet */
 129         HWTSTAMP_FILTER_PTP_V2_SYNC,
 130         /* PTP v2/802.AS1, any layer, Delay_req packet */
 131         HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
 132
 133         /* NTP, UDP, all versions and packet modes */
 134         HWTSTAMP_FILTER_NTP_ALL,
 135 };
 136
 137 /* SCM_TIMESTAMPING_PKTINFO control message */
 138 struct scm_ts_pktinfo {
 139         __u32 if_index;
 140         __u32 pkt_length;
 141         __u32 reserved[2];
 142 };
 143
 144 #endif /* _NET_TIMESTAMPING_H */