1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Userspace API for hardware time stamping of network packets 4 * 5 * Copyright (C) 2008,2009 Intel Corporation 6 * Author: Patrick Ohly <patrick.ohly@intel.com> 7 * 8 */ 9 10 #ifndef _NET_TIMESTAMPING_H 11 #define _NET_TIMESTAMPING_H 12 13 #include <linux/types.h> 14 #include <linux/socket.h> /* for SO_TIMESTAMPING */ 15 16 /* SO_TIMESTAMPING gets an integer bit field comprised of these values */ 17 enum { 18 SOF_TIMESTAMPING_TX_HARDWARE = (1<<0), 19 SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1), 20 SOF_TIMESTAMPING_RX_HARDWARE = (1<<2), 21 SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3), 22 SOF_TIMESTAMPING_SOFTWARE = (1<<4), 23 SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5), 24 SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6), 25 SOF_TIMESTAMPING_OPT_ID = (1<<7), 26 SOF_TIMESTAMPING_TX_SCHED = (1<<8), 27 SOF_TIMESTAMPING_TX_ACK = (1<<9), 28 SOF_TIMESTAMPING_OPT_CMSG = (1<<10), 29 SOF_TIMESTAMPING_OPT_TSONLY = (1<<11), 30 SOF_TIMESTAMPING_OPT_STATS = (1<<12), 31 SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13), 32 SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14), 33 34 SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TX_SWHW, 35 SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) | 36 SOF_TIMESTAMPING_LAST 37 }; 38 39 /* 40 * SO_TIMESTAMPING flags are either for recording a packet timestamp or for 41 * reporting the timestamp to user space. 42 * Recording flags can be set both via socket options and control messages. 43 */ 44 #define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \ 45 SOF_TIMESTAMPING_TX_SOFTWARE | \ 46 SOF_TIMESTAMPING_TX_SCHED | \ 47 SOF_TIMESTAMPING_TX_ACK) 48 49 /** 50 * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter 51 * 52 * @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP 53 * @tx_type: one of HWTSTAMP_TX_* 54 * @rx_filter: one of HWTSTAMP_FILTER_* 55 * 56 * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a 57 * ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the 58 * driver or hardware does not support the requested @rx_filter value, 59 * the driver may use a more general filter mode. In this case 60 * @rx_filter will indicate the actual mode on return. 61 */ 62 struct hwtstamp_config { 63 int flags; 64 int tx_type; 65 int rx_filter; 66 }; 67 68 /* possible values for hwtstamp_config->tx_type */ 69 enum hwtstamp_tx_types { 70 /* 71 * No outgoing packet will need hardware time stamping; 72 * should a packet arrive which asks for it, no hardware 73 * time stamping will be done. 74 */ 75 HWTSTAMP_TX_OFF, 76 77 /* 78 * Enables hardware time stamping for outgoing packets; 79 * the sender of the packet decides which are to be 80 * time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE 81 * before sending the packet. 82 */ 83 HWTSTAMP_TX_ON, 84 85 /* 86 * Enables time stamping for outgoing packets just as 87 * HWTSTAMP_TX_ON does, but also enables time stamp insertion 88 * directly into Sync packets. In this case, transmitted Sync 89 * packets will not received a time stamp via the socket error 90 * queue. 91 */ 92 HWTSTAMP_TX_ONESTEP_SYNC, 93 }; 94 95 /* possible values for hwtstamp_config->rx_filter */ 96 enum hwtstamp_rx_filters { 97 /* time stamp no incoming packet at all */ 98 HWTSTAMP_FILTER_NONE, 99 100 /* time stamp any incoming packet */ 101 HWTSTAMP_FILTER_ALL, 102 103 /* return value: time stamp all packets requested plus some others */ 104 HWTSTAMP_FILTER_SOME, 105 106 /* PTP v1, UDP, any kind of event packet */ 107 HWTSTAMP_FILTER_PTP_V1_L4_EVENT, 108 /* PTP v1, UDP, Sync packet */ 109 HWTSTAMP_FILTER_PTP_V1_L4_SYNC, 110 /* PTP v1, UDP, Delay_req packet */ 111 HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ, 112 /* PTP v2, UDP, any kind of event packet */ 113 HWTSTAMP_FILTER_PTP_V2_L4_EVENT, 114 /* PTP v2, UDP, Sync packet */ 115 HWTSTAMP_FILTER_PTP_V2_L4_SYNC, 116 /* PTP v2, UDP, Delay_req packet */ 117 HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ, 118 119 /* 802.AS1, Ethernet, any kind of event packet */ 120 HWTSTAMP_FILTER_PTP_V2_L2_EVENT, 121 /* 802.AS1, Ethernet, Sync packet */ 122 HWTSTAMP_FILTER_PTP_V2_L2_SYNC, 123 /* 802.AS1, Ethernet, Delay_req packet */ 124 HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ, 125 126 /* PTP v2/802.AS1, any layer, any kind of event packet */ 127 HWTSTAMP_FILTER_PTP_V2_EVENT, 128 /* PTP v2/802.AS1, any layer, Sync packet */ 129 HWTSTAMP_FILTER_PTP_V2_SYNC, 130 /* PTP v2/802.AS1, any layer, Delay_req packet */ 131 HWTSTAMP_FILTER_PTP_V2_DELAY_REQ, 132 133 /* NTP, UDP, all versions and packet modes */ 134 HWTSTAMP_FILTER_NTP_ALL, 135 }; 136 137 /* SCM_TIMESTAMPING_PKTINFO control message */ 138 struct scm_ts_pktinfo { 139 __u32 if_index; 140 __u32 pkt_length; 141 __u32 reserved[2]; 142 }; 143 144 /* 145 * SO_TXTIME gets a struct sock_txtime with flags being an integer bit 146 * field comprised of these values. 147 */ 148 enum txtime_flags { 149 SOF_TXTIME_DEADLINE_MODE = (1 << 0), 150 SOF_TXTIME_REPORT_ERRORS = (1 << 1), 151 152 SOF_TXTIME_FLAGS_LAST = SOF_TXTIME_REPORT_ERRORS, 153 SOF_TXTIME_FLAGS_MASK = (SOF_TXTIME_FLAGS_LAST - 1) | 154 SOF_TXTIME_FLAGS_LAST 155 }; 156 157 struct sock_txtime { 158 clockid_t clockid; /* reference clockid */ 159 __u32 flags; /* as defined by enum txtime_flags */ 160 }; 161 162 #endif /* _NET_TIMESTAMPING_H */ 163
