Lines Matching full:timestamping

4 Timestamping  title
24   Same timestamping mechanism as SO_TIMESTAMP, but reports the
45 This socket option enables timestamping of datagrams on the reception
98 requested by a particular socket, such as when receive timestamping is
172   have multiple concurrent timestamping requests outstanding. Packets
213   timestamping applications. SOF_TIMESTAMPING_OPT_ID defines how the
346 The SO_TIMESTAMPING interface supports timestamping of bytes in a
348 entire contents of the buffer has passed a timestamping point. That
528 3. Hardware Timestamping configuration: ETHTOOL_MSG_TSCONFIG_SET/GET
618 3.1 Hardware Timestamping Implementation: Device Drivers
655   and hardware timestamping is not possible (SKBTX_IN_PROGRESS not set).
672 user to select which PHC to use for timestamping Ethernet frames. Instead, the
690 switches include a timestamping clock of their own, and have the ability to
691 perform network timestamping on their own MAC, such that path delays only
692 measure wire and PHY propagation latencies. Timestamping DSA switches are
698 By design, PTP timestamping with a DSA switch does not need any special
700 host port also supports PTP timestamping, DSA will take care of intercepting
702 hardware timestamping on it. This is because the SO_TIMESTAMPING API does not
707 timestamping:
710   packets with a hardware TX timestamping request from user space.
711   This is required for two-step timestamping, since the hardware
722   packets in a queue waiting for timestamping and the actual timestamps,
728   One-step TX timestamping do not require packet cloning, since there is
741   (through another RX timestamping FIFO). Deferral on RX is typically
755 A PHY driver that supports PTP timestamping must create a ``struct
759 Since PHYs do not have network interface representations, the timestamping and
762 to each individual MAC driver for PHY timestamping support. This entails:
775   deferral for RX timestamping is necessary.  Again like DSA, it becomes the
789   drivers already perform for software timestamping purposes. Therefore, if a
790   MAC supports software timestamping, it does not need to do anything further
796 These perform the same role as timestamping Ethernet PHYs, save for the fact
798 any PHY even if it doesn't support timestamping. In Linux, they are
814 Any TX timestamping logic, be it a plain MAC driver, a DSA switch driver, a PHY
819 For example, a typical driver design for TX timestamping might be to split the
822 1. "TX": checks whether PTP timestamping has been previously enabled through
843 that PTP timestamping is not enabled for anything other than the outermost PHC,