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105 lines
3 KiB
C
105 lines
3 KiB
C
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/*
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* Userspace API for hardware time stamping of network packets
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*
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* Copyright (C) 2008,2009 Intel Corporation
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* Author: Patrick Ohly <patrick.ohly@intel.com>
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*
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*/
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#ifndef _NET_TIMESTAMPING_H
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#define _NET_TIMESTAMPING_H
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#include <linux/socket.h> /* for SO_TIMESTAMPING */
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/* SO_TIMESTAMPING gets an integer bit field comprised of these values */
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enum {
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SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
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SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1),
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SOF_TIMESTAMPING_RX_HARDWARE = (1<<2),
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SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3),
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SOF_TIMESTAMPING_SOFTWARE = (1<<4),
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SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5),
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SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6),
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SOF_TIMESTAMPING_MASK =
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(SOF_TIMESTAMPING_RAW_HARDWARE - 1) |
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SOF_TIMESTAMPING_RAW_HARDWARE
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};
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/**
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* struct hwtstamp_config - %SIOCSHWTSTAMP parameter
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*
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* @flags: no flags defined right now, must be zero
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* @tx_type: one of HWTSTAMP_TX_*
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* @rx_type: one of one of HWTSTAMP_FILTER_*
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*
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* %SIOCSHWTSTAMP expects a &struct ifreq with a ifr_data pointer to
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* this structure. dev_ifsioc() in the kernel takes care of the
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* translation between 32 bit userspace and 64 bit kernel. The
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* structure is intentionally chosen so that it has the same layout on
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* 32 and 64 bit systems, don't break this!
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*/
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struct hwtstamp_config {
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int flags;
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int tx_type;
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int rx_filter;
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};
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/* possible values for hwtstamp_config->tx_type */
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enum {
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/*
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* No outgoing packet will need hardware time stamping;
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* should a packet arrive which asks for it, no hardware
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* time stamping will be done.
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*/
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HWTSTAMP_TX_OFF,
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/*
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* Enables hardware time stamping for outgoing packets;
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* the sender of the packet decides which are to be
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* time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
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* before sending the packet.
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*/
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HWTSTAMP_TX_ON,
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};
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/* possible values for hwtstamp_config->rx_filter */
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enum {
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/* time stamp no incoming packet at all */
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HWTSTAMP_FILTER_NONE,
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/* time stamp any incoming packet */
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HWTSTAMP_FILTER_ALL,
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/* return value: time stamp all packets requested plus some others */
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HWTSTAMP_FILTER_SOME,
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/* PTP v1, UDP, any kind of event packet */
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HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
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/* PTP v1, UDP, Sync packet */
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HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
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/* PTP v1, UDP, Delay_req packet */
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HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
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/* PTP v2, UDP, any kind of event packet */
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HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
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/* PTP v2, UDP, Sync packet */
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HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
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/* PTP v2, UDP, Delay_req packet */
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HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
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/* 802.AS1, Ethernet, any kind of event packet */
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HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
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/* 802.AS1, Ethernet, Sync packet */
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HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
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/* 802.AS1, Ethernet, Delay_req packet */
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HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
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/* PTP v2/802.AS1, any layer, any kind of event packet */
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HWTSTAMP_FILTER_PTP_V2_EVENT,
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/* PTP v2/802.AS1, any layer, Sync packet */
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HWTSTAMP_FILTER_PTP_V2_SYNC,
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/* PTP v2/802.AS1, any layer, Delay_req packet */
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HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
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};
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#endif /* _NET_TIMESTAMPING_H */
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