• Murali Karicheri's avatar
    net: prp: add packet handling support · 451d8123
    Murali Karicheri authored
    DAN-P (Dual Attached Nodes PRP) nodes are expected to receive
    traditional IP packets as well as PRP (Parallel Redundancy
    Protocol) tagged (trailer) packets. PRP trailer is 6 bytes
    of PRP protocol unit called RCT, Redundancy Control Trailer
    (RCT) similar to HSR tag. PRP network can have traditional
    devices such as bridges/switches or PC attached to it and
    should be able to communicate. Regular Ethernet devices treat
    the RCT as pads.  This patch adds logic to format L2 frames
    from network stack to add a trailer (RCT) and send it as
    duplicates over the slave interfaces when the protocol is
    PRP as per IEC 62439-3. At the ingress, it strips the trailer,
    do duplicate detection and rejection and forward a stripped
    frame up the network stack. PRP device should accept frames
    from Singly Attached Nodes (SAN) and thus the driver mark
    the link where the frame came from in the node table.
    Signed-off-by: default avatarMurali Karicheri <m-karicheri2@ti.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    451d8123
hsr_framereg.c 15.8 KB