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 */ 15enum { 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 */ 41struct hwtstamp_config { 42 int flags; 43 int tx_type; 44 int rx_filter; 45}; 46 47/* possible values for hwtstamp_config->tx_type */ 48enum { 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/* possible values for hwtstamp_config->rx_filter */ 66enum { 67 /* time stamp no incoming packet at all */ 68 HWTSTAMP_FILTER_NONE, 69 70 /* time stamp any incoming packet */ 71 HWTSTAMP_FILTER_ALL, 72 73 /* return value: time stamp all packets requested plus some others */ 74 HWTSTAMP_FILTER_SOME, 75 76 /* PTP v1, UDP, any kind of event packet */ 77 HWTSTAMP_FILTER_PTP_V1_L4_EVENT, 78 /* PTP v1, UDP, Sync packet */ 79 HWTSTAMP_FILTER_PTP_V1_L4_SYNC, 80 /* PTP v1, UDP, Delay_req packet */ 81 HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ, 82 /* PTP v2, UDP, any kind of event packet */ 83 HWTSTAMP_FILTER_PTP_V2_L4_EVENT, 84 /* PTP v2, UDP, Sync packet */ 85 HWTSTAMP_FILTER_PTP_V2_L4_SYNC, 86 /* PTP v2, UDP, Delay_req packet */ 87 HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ, 88 89 /* 802.AS1, Ethernet, any kind of event packet */ 90 HWTSTAMP_FILTER_PTP_V2_L2_EVENT, 91 /* 802.AS1, Ethernet, Sync packet */ 92 HWTSTAMP_FILTER_PTP_V2_L2_SYNC, 93 /* 802.AS1, Ethernet, Delay_req packet */ 94 HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ, 95 96 /* PTP v2/802.AS1, any layer, any kind of event packet */ 97 HWTSTAMP_FILTER_PTP_V2_EVENT, 98 /* PTP v2/802.AS1, any layer, Sync packet */ 99 HWTSTAMP_FILTER_PTP_V2_SYNC, 100 /* PTP v2/802.AS1, any layer, Delay_req packet */ 101 HWTSTAMP_FILTER_PTP_V2_DELAY_REQ, 102}; 103 104#endif /* _NET_TIMESTAMPING_H */ 105