include/uapi/linux/net_tstamp.h

   1 /*
   2  * Userspace API for hardware time stamping of network packets
   3  *
   4  * Copyright (C) 2008,2009 Intel Corporation
   5  * Author: Patrick Ohly <patrick.ohly@intel.com>
   6  *
   7  */
   8
   9 #ifndef _NET_TIMESTAMPING_H
  10 #define _NET_TIMESTAMPING_H
  11
  12 #include <linux/socket.h>   /* for SO_TIMESTAMPING */
  13
  14 /* SO_TIMESTAMPING gets an integer bit field comprised of these values */
  15 enum {
  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),
  28
  29         SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TSONLY,
  30         SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
  31                                  SOF_TIMESTAMPING_LAST
  32 };
  33
  34 /*
  35  * SO_TIMESTAMPING flags are either for recording a packet timestamp or for
  36  * reporting the timestamp to user space.
  37  * Recording flags can be set both via socket options and control messages.
  38  */
  39 #define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \
  40                                          SOF_TIMESTAMPING_TX_SOFTWARE | \
  41                                          SOF_TIMESTAMPING_TX_SCHED | \
  42                                          SOF_TIMESTAMPING_TX_ACK)
  43
  44 /**
  45  * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
  46  *
  47  * @flags:      no flags defined right now, must be zero for %SIOCSHWTSTAMP
  48  * @tx_type:    one of HWTSTAMP_TX_*
  49  * @rx_filter:  one of HWTSTAMP_FILTER_*
  50  *
  51  * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
  52  * ifr_data pointer to this structure.  For %SIOCSHWTSTAMP, if the
  53  * driver or hardware does not support the requested @rx_filter value,
  54  * the driver may use a more general filter mode.  In this case
  55  * @rx_filter will indicate the actual mode on return.
  56  */
  57 struct hwtstamp_config {
  58         int flags;
  59         int tx_type;
  60         int rx_filter;
  61 };
  62
  63 /* possible values for hwtstamp_config->tx_type */
  64 enum hwtstamp_tx_types {
  65         /*
  66          * No outgoing packet will need hardware time stamping;
  67          * should a packet arrive which asks for it, no hardware
  68          * time stamping will be done.
  69          */
  70         HWTSTAMP_TX_OFF,
  71
  72         /*
  73          * Enables hardware time stamping for outgoing packets;
  74          * the sender of the packet decides which are to be
  75          * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
  76          * before sending the packet.
  77          */
  78         HWTSTAMP_TX_ON,
  79
  80         /*
  81          * Enables time stamping for outgoing packets just as
  82          * HWTSTAMP_TX_ON does, but also enables time stamp insertion
  83          * directly into Sync packets. In this case, transmitted Sync
  84          * packets will not received a time stamp via the socket error
  85          * queue.
  86          */
  87         HWTSTAMP_TX_ONESTEP_SYNC,
  88 };
  89
  90 /* possible values for hwtstamp_config->rx_filter */
  91 enum hwtstamp_rx_filters {
  92         /* time stamp no incoming packet at all */
  93         HWTSTAMP_FILTER_NONE,
  94
  95         /* time stamp any incoming packet */
  96         HWTSTAMP_FILTER_ALL,
  97
  98         /* return value: time stamp all packets requested plus some others */
  99         HWTSTAMP_FILTER_SOME,
 100
 101         /* PTP v1, UDP, any kind of event packet */
 102         HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
 103         /* PTP v1, UDP, Sync packet */
 104         HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
 105         /* PTP v1, UDP, Delay_req packet */
 106         HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
 107         /* PTP v2, UDP, any kind of event packet */
 108         HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
 109         /* PTP v2, UDP, Sync packet */
 110         HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
 111         /* PTP v2, UDP, Delay_req packet */
 112         HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
 113
 114         /* 802.AS1, Ethernet, any kind of event packet */
 115         HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
 116         /* 802.AS1, Ethernet, Sync packet */
 117         HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
 118         /* 802.AS1, Ethernet, Delay_req packet */
 119         HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
 120
 121         /* PTP v2/802.AS1, any layer, any kind of event packet */
 122         HWTSTAMP_FILTER_PTP_V2_EVENT,
 123         /* PTP v2/802.AS1, any layer, Sync packet */
 124         HWTSTAMP_FILTER_PTP_V2_SYNC,
 125         /* PTP v2/802.AS1, any layer, Delay_req packet */
 126         HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
 127 };
 128
 129 #endif /* _NET_TIMESTAMPING_H */