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  * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
  36  *
  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_*
  40  *
  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.
  46  */
  47 struct hwtstamp_config {
  48         int flags;
  49         int tx_type;
  50         int rx_filter;
  51 };
  52
  53 /* possible values for hwtstamp_config->tx_type */
  54 enum hwtstamp_tx_types {
  55         /*
  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.
  59          */
  60         HWTSTAMP_TX_OFF,
  61
  62         /*
  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.
  67          */
  68         HWTSTAMP_TX_ON,
  69
  70         /*
  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
  75          * queue.
  76          */
  77         HWTSTAMP_TX_ONESTEP_SYNC,
  78 };
  79
  80 /* possible values for hwtstamp_config->rx_filter */
  81 enum hwtstamp_rx_filters {
  82         /* time stamp no incoming packet at all */
  83         HWTSTAMP_FILTER_NONE,
  84
  85         /* time stamp any incoming packet */
  86         HWTSTAMP_FILTER_ALL,
  87
  88         /* return value: time stamp all packets requested plus some others */
  89         HWTSTAMP_FILTER_SOME,
  90
  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,
 103
 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,
 110
 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,
 117 };
 118
 119 #endif /* _NET_TIMESTAMPING_H */