diff --git a/Documentation/networking/timestamping.txt b/Documentation/networking/timestamping.txt index 8b4ad809df27..897f942b976b 100644 --- a/Documentation/networking/timestamping.txt +++ b/Documentation/networking/timestamping.txt @@ -88,15 +88,8 @@ hwtimeraw is the original hardware time stamp. Filled in if SOF_TIMESTAMPING_RAW_HARDWARE is set. No assumptions about its relation to system time should be made. -hwtimetrans is the hardware time stamp transformed so that it -corresponds as good as possible to system time. This correlation is -not perfect; as a consequence, sorting packets received via different -NICs by their hwtimetrans may differ from the order in which they were -received. hwtimetrans may be non-monotonic even for the same NIC. -Filled in if SOF_TIMESTAMPING_SYS_HARDWARE is set. Requires support -by the network device and will be empty without that support. This -field is DEPRECATED. Only one driver computes this value. New device -drivers must leave this zero. Instead, they can expose the hardware +hwtimetrans is always zero. This field is deprecated. It used to hold +hw timestamps converted to system time. Instead, expose the hardware clock device on the NIC directly as a HW PTP clock source, to allow time conversion in userspace and optionally synchronize system time with a userspace PTP stack such as linuxptp. For the PTP clock API, @@ -191,7 +184,6 @@ struct skb_shared_hwtstamps { * since arbitrary point in time */ ktime_t hwtstamp; - ktime_t syststamp; /* hwtstamp transformed to system time base */ }; Time stamps for outgoing packets are to be generated as follows: diff --git a/Documentation/networking/timestamping/timestamping.c b/Documentation/networking/timestamping/timestamping.c index 8ba82bfe6a33..5cdfd743447b 100644 --- a/Documentation/networking/timestamping/timestamping.c +++ b/Documentation/networking/timestamping/timestamping.c @@ -76,7 +76,6 @@ static void usage(const char *error) " SOF_TIMESTAMPING_RX_HARDWARE - hardware time stamping of incoming packets\n" " SOF_TIMESTAMPING_RX_SOFTWARE - software fallback for incoming packets\n" " SOF_TIMESTAMPING_SOFTWARE - request reporting of software time stamps\n" - " SOF_TIMESTAMPING_SYS_HARDWARE - request reporting of transformed HW time stamps\n" " SOF_TIMESTAMPING_RAW_HARDWARE - request reporting of raw HW time stamps\n" " SIOCGSTAMP - check last socket time stamp\n" " SIOCGSTAMPNS - more accurate socket time stamp\n"); @@ -202,9 +201,7 @@ static void printpacket(struct msghdr *msg, int res, (long)stamp->tv_sec, (long)stamp->tv_nsec); stamp++; - printf("HW transformed %ld.%09ld ", - (long)stamp->tv_sec, - (long)stamp->tv_nsec); + /* skip deprecated HW transformed */ stamp++; printf("HW raw %ld.%09ld", (long)stamp->tv_sec, @@ -361,8 +358,6 @@ int main(int argc, char **argv) so_timestamping_flags |= SOF_TIMESTAMPING_RX_SOFTWARE; else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_SOFTWARE")) so_timestamping_flags |= SOF_TIMESTAMPING_SOFTWARE; - else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_SYS_HARDWARE")) - so_timestamping_flags |= SOF_TIMESTAMPING_SYS_HARDWARE; else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RAW_HARDWARE")) so_timestamping_flags |= SOF_TIMESTAMPING_RAW_HARDWARE; else diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index b613557132b9..281deced7469 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -210,20 +210,9 @@ static inline void skb_frag_size_sub(skb_frag_t *frag, int delta) * struct skb_shared_hwtstamps - hardware time stamps * @hwtstamp: hardware time stamp transformed into duration * since arbitrary point in time - * @syststamp: hwtstamp transformed to system time base (deprecated) * * Software time stamps generated by ktime_get_real() are stored in - * skb->tstamp. The relation between the different kinds of time - * stamps is as follows: - * - * syststamp and tstamp can be compared against each other in - * arbitrary combinations. The accuracy of a - * syststamp/tstamp/"syststamp from other device" comparison is - * limited by the accuracy of the transformation into system time - * base. This depends on the device driver and its underlying - * hardware. The syststamp implementation is deprecated in favor - * of hwtstamps and hw PTP clock sources exposed directly to - * userspace. + * skb->tstamp. * * hwtstamps can only be compared against other hwtstamps from * the same device. @@ -233,7 +222,6 @@ static inline void skb_frag_size_sub(skb_frag_t *frag, int delta) */ struct skb_shared_hwtstamps { ktime_t hwtstamp; - ktime_t syststamp; }; /* Definitions for tx_flags in struct skb_shared_info */ diff --git a/include/net/sock.h b/include/net/sock.h index 720773304a85..b91c8868ab8d 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -707,7 +707,6 @@ enum sock_flags { SOCK_TIMESTAMPING_RX_SOFTWARE, /* %SOF_TIMESTAMPING_RX_SOFTWARE */ SOCK_TIMESTAMPING_SOFTWARE, /* %SOF_TIMESTAMPING_SOFTWARE */ SOCK_TIMESTAMPING_RAW_HARDWARE, /* %SOF_TIMESTAMPING_RAW_HARDWARE */ - SOCK_TIMESTAMPING_SYS_HARDWARE, /* %SOF_TIMESTAMPING_SYS_HARDWARE */ SOCK_FASYNC, /* fasync() active */ SOCK_RXQ_OVFL, SOCK_ZEROCOPY, /* buffers from userspace */ @@ -2166,16 +2165,13 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) * - software time stamp available and wanted * (SOCK_TIMESTAMPING_SOFTWARE) * - hardware time stamps available and wanted - * (SOCK_TIMESTAMPING_SYS_HARDWARE or - * SOCK_TIMESTAMPING_RAW_HARDWARE) + * SOCK_TIMESTAMPING_RAW_HARDWARE */ if (sock_flag(sk, SOCK_RCVTSTAMP) || sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) || (kt.tv64 && sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) || (hwtstamps->hwtstamp.tv64 && - sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) || - (hwtstamps->syststamp.tv64 && - sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE))) + sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE))) __sock_recv_timestamp(msg, sk, skb); else sk->sk_stamp = kt; @@ -2193,8 +2189,7 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, #define FLAGS_TS_OR_DROPS ((1UL << SOCK_RXQ_OVFL) | \ (1UL << SOCK_RCVTSTAMP) | \ (1UL << SOCK_TIMESTAMPING_SOFTWARE) | \ - (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE) | \ - (1UL << SOCK_TIMESTAMPING_SYS_HARDWARE)) + (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE)) if (sk->sk_flags & FLAGS_TS_OR_DROPS) __sock_recv_ts_and_drops(msg, sk, skb); diff --git a/net/core/sock.c b/net/core/sock.c index ca9b65199d28..134291d73fcd 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -862,8 +862,6 @@ set_rcvbuf: (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)); sock_valbool_flag(sk, SOCK_TIMESTAMPING_SOFTWARE, val & SOF_TIMESTAMPING_SOFTWARE); - sock_valbool_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE, - val & SOF_TIMESTAMPING_SYS_HARDWARE); sock_valbool_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE, val & SOF_TIMESTAMPING_RAW_HARDWARE); break; @@ -1102,8 +1100,6 @@ int sock_getsockopt(struct socket *sock, int level, int optname, v.val |= SOF_TIMESTAMPING_RX_SOFTWARE; if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) v.val |= SOF_TIMESTAMPING_SOFTWARE; - if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)) - v.val |= SOF_TIMESTAMPING_SYS_HARDWARE; if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) v.val |= SOF_TIMESTAMPING_RAW_HARDWARE; break; diff --git a/net/socket.c b/net/socket.c index abf56b2a14f9..d8222c025061 100644 --- a/net/socket.c +++ b/net/socket.c @@ -725,14 +725,10 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && ktime_to_timespec_cond(skb->tstamp, ts + 0)) empty = 0; - if (shhwtstamps) { - if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && - ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) - empty = 0; - if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && - ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) - empty = 0; - } + if (shhwtstamps && + sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && + ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) + empty = 0; if (!empty) put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING, sizeof(ts), &ts);