Lines Matching refs:DSA
634 3.2.1 DSA (Distributed Switch Architecture) switches
639 a port multiplier with optional forwarding acceleration features. Each DSA
644 When a DSA switch is attached to a host port, PTP synchronization has to
646 jitter between the host port and its PTP partner. For this reason, some DSA
649 measure wire and PHY propagation latencies. Timestamping DSA switches are
651 for the fact that the DSA interfaces are in fact virtual in terms of network
653 interfaces of a DSA switch to share the same PHC.
655 By design, PTP timestamping with a DSA switch does not need any special
657 host port also supports PTP timestamping, DSA will take care of intercepting
661 anybody else except for the DSA switch port must be prevented from doing so.
663 In the generic layer, DSA provides the following infrastructure for PTP
691 - ``.port_rxtstamp()``: On RX, the BPF classifier is run by DSA to
697 DSA header, or attached in other ways to the packet), or out-of-band
700 that case, it is the responsibility of the DSA driver to call
707 hence they do not have a representation in terms of a network interface as DSA
718 driver. Therefore, as opposed to DSA switches, modifications need to be done
731 will be called now, to determine, using logic very similar to DSA, whether
732 deferral for RX timestamping is necessary. Again like DSA, it becomes the
763 Stacked PHCs, especially DSA (but not only) - since that doesn't require any
771 Any TX timestamping logic, be it a plain MAC driver, a DSA switch driver, a PHY