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 */ 114