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001: /* 002: * Userspace API for hardware time stamping of network packets 003: * 004: * Copyright (C) 2008,2009 Intel Corporation 005: * Author: Patrick Ohly <patrick.ohly@intel.com> 006: * 007: */ 008: 009: #ifndef _NET_TIMESTAMPING_H 010: #define _NET_TIMESTAMPING_H 011: 012: #include <linux/socket.h> /* for SO_TIMESTAMPING */ 013: 014: /* SO_TIMESTAMPING gets an integer bit field comprised of these values */ 015: enum { 016: SOF_TIMESTAMPING_TX_HARDWARE = (1<<0), 017: SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1), 018: SOF_TIMESTAMPING_RX_HARDWARE = (1<<2), 019: SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3), 020: SOF_TIMESTAMPING_SOFTWARE = (1<<4), 021: SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5), 022: SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6), 023: SOF_TIMESTAMPING_MASK = 024: (SOF_TIMESTAMPING_RAW_HARDWARE - 1) | 025: SOF_TIMESTAMPING_RAW_HARDWARE 026: }; 027: 028: /** 029: * struct hwtstamp_config - %SIOCSHWTSTAMP parameter 030: * 031: * @flags: no flags defined right now, must be zero 032: * @tx_type: one of HWTSTAMP_TX_* 033: * @rx_type: one of one of HWTSTAMP_FILTER_* 034: * 035: * %SIOCSHWTSTAMP expects a &struct ifreq with a ifr_data pointer to 036: * this structure. dev_ifsioc() in the kernel takes care of the 037: * translation between 32 bit userspace and 64 bit kernel. The 038: * structure is intentionally chosen so that it has the same layout on 039: * 32 and 64 bit systems, don't break this! 040: */ 041: struct hwtstamp_config { 042: int flags; 043: int tx_type; 044: int rx_filter; 045: }; 046: 047: /* possible values for hwtstamp_config->tx_type */ 048: enum hwtstamp_tx_types { 049: /* 050: * No outgoing packet will need hardware time stamping; 051: * should a packet arrive which asks for it, no hardware 052: * time stamping will be done. 053: */ 054: HWTSTAMP_TX_OFF, 055: 056: /* 057: * Enables hardware time stamping for outgoing packets; 058: * the sender of the packet decides which are to be 059: * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE 060: * before sending the packet. 061: */ 062: HWTSTAMP_TX_ON, 063: 064: /* 065: * Enables time stamping for outgoing packets just as 066: * HWTSTAMP_TX_ON does, but also enables time stamp insertion 067: * directly into Sync packets. In this case, transmitted Sync 068: * packets will not received a time stamp via the socket error 069: * queue. 070: */ 071: HWTSTAMP_TX_ONESTEP_SYNC, 072: }; 073: 074: /* possible values for hwtstamp_config->rx_filter */ 075: enum hwtstamp_rx_filters { 076: /* time stamp no incoming packet at all */ 077: HWTSTAMP_FILTER_NONE, 078: 079: /* time stamp any incoming packet */ 080: HWTSTAMP_FILTER_ALL, 081: 082: /* return value: time stamp all packets requested plus some others */ 083: HWTSTAMP_FILTER_SOME, 084: 085: /* PTP v1, UDP, any kind of event packet */ 086: HWTSTAMP_FILTER_PTP_V1_L4_EVENT, 087: /* PTP v1, UDP, Sync packet */ 088: HWTSTAMP_FILTER_PTP_V1_L4_SYNC, 089: /* PTP v1, UDP, Delay_req packet */ 090: HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ, 091: /* PTP v2, UDP, any kind of event packet */ 092: HWTSTAMP_FILTER_PTP_V2_L4_EVENT, 093: /* PTP v2, UDP, Sync packet */ 094: HWTSTAMP_FILTER_PTP_V2_L4_SYNC, 095: /* PTP v2, UDP, Delay_req packet */ 096: HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ, 097: 098: /* 802.AS1, Ethernet, any kind of event packet */ 099: 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 */ 114: