include/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_MASK =
  24         (SOF_TIMESTAMPING_RAW_HARDWARE - 1) |
  25         SOF_TIMESTAMPING_RAW_HARDWARE
  26 };
  27
  28 /**
  29  * struct hwtstamp_config - %SIOCSHWTSTAMP parameter
  30  *
  31  * @flags:      no flags defined right now, must be zero
  32  * @tx_type:    one of HWTSTAMP_TX_*
  33  * @rx_type:    one of one of HWTSTAMP_FILTER_*
  34  *
  35  * %SIOCSHWTSTAMP expects a &struct ifreq with a ifr_data pointer to
  36  * this structure. dev_ifsioc() in the kernel takes care of the
  37  * translation between 32 bit userspace and 64 bit kernel. The
  38  * structure is intentionally chosen so that it has the same layout on
  39  * 32 and 64 bit systems, don't break this!
  40  */
  41 struct hwtstamp_config {
  42         int flags;
  43         int tx_type;
  44         int rx_filter;
  45 };
  46
  47 /* possible values for hwtstamp_config->tx_type */
  48 enum hwtstamp_tx_types {
  49         /*
  50          * No outgoing packet will need hardware time stamping;
  51          * should a packet arrive which asks for it, no hardware
  52          * time stamping will be done.
  53          */
  54         HWTSTAMP_TX_OFF,
  55
  56         /*
  57          * Enables hardware time stamping for outgoing packets;
  58          * the sender of the packet decides which are to be
  59          * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
  60          * before sending the packet.
  61          */
  62         HWTSTAMP_TX_ON,
  63
  64         /*
  65          * Enables time stamping for outgoing packets just as
  66          * HWTSTAMP_TX_ON does, but also enables time stamp insertion
  67          * directly into Sync packets. In this case, transmitted Sync
  68          * packets will not received a time stamp via the socket error
  69          * queue.
  70          */
  71         HWTSTAMP_TX_ONESTEP_SYNC,
  72 };
  73
  74 /* possible values for hwtstamp_config->rx_filter */
  75 enum hwtstamp_rx_filters {
  76         /* time stamp no incoming packet at all */
  77         HWTSTAMP_FILTER_NONE,
  78
  79         /* time stamp any incoming packet */
  80         HWTSTAMP_FILTER_ALL,
  81
  82         /* return value: time stamp all packets requested plus some others */
  83         HWTSTAMP_FILTER_SOME,
  84
  85         /* PTP v1, UDP, any kind of event packet */
  86         HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
  87         /* PTP v1, UDP, Sync packet */
  88         HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
  89         /* PTP v1, UDP, Delay_req packet */
  90         HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
  91         /* PTP v2, UDP, any kind of event packet */
  92         HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
  93         /* PTP v2, UDP, Sync packet */
  94         HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
  95         /* PTP v2, UDP, Delay_req packet */
  96         HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
  97
  98         /* 802.AS1, Ethernet, any kind of event packet */
  99         HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
 100         /* 802.AS1, Ethernet, Sync packet */
 101         HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
 102         /* 802.AS1, Ethernet, Delay_req packet */
 103         HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
 104
 105         /* PTP v2/802.AS1, any layer, any kind of event packet */
 106         HWTSTAMP_FILTER_PTP_V2_EVENT,
 107         /* PTP v2/802.AS1, any layer, Sync packet */
 108         HWTSTAMP_FILTER_PTP_V2_SYNC,
 109         /* PTP v2/802.AS1, any layer, Delay_req packet */
 110         HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
 111 };
 112
 113 #endif /* _NET_TIMESTAMPING_H */