• Matan Barak's avatar
    IB/core: Ethernet L2 attributes in verbs/cm structures · dd5f03be
    Matan Barak authored
    
    
    This patch add the support for Ethernet L2 attributes in the
    verbs/cm/cma structures.
    
    When dealing with L2 Ethernet, we should use smac, dmac, vlan ID and priority
    in a similar manner that the IB L2 (and the L4 PKEY) attributes are used.
    
    Thus, those attributes were added to the following structures:
    
    * ib_ah_attr - added dmac
    * ib_qp_attr - added smac and vlan_id, (sl remains vlan priority)
    * ib_wc - added smac, vlan_id
    * ib_sa_path_rec - added smac, dmac, vlan_id
    * cm_av - added smac and vlan_id
    
    For the path record structure, extra care was taken to avoid the new
    fields when packing it into wire format, so we don't break the IB CM
    and SA wire protocol.
    
    On the active side, the CM fills. its internal structures from the
    path provided by the ULP.  We add there taking the ETH L2 attributes
    and placing them into the CM Address Handle (struct cm_av).
    
    On the passive side, the CM fills its internal structures from the WC
    associated with the REQ message.  We add there taking the ETH L2
    attributes from the WC.
    
    When the HW driver provides the required ETH L2 attributes in the WC,
    they set the IB_WC_WITH_SMAC and IB_WC_WITH_VLAN flags. The IB core
    code checks for the presence of these flags, and in their absence does
    address resolution from the ib_init_ah_from_wc() helper function.
    
    ib_modify_qp_is_ok is also updated to consider the link layer. Some
    parameters are mandatory for Ethernet link layer, while they are
    irrelevant for IB.  Vendor drivers are modified to support the new
    function signature.
    Signed-off-by: default avatarMatan Barak <matanb@mellanox.com>
    Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
    Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
    dd5f03be
addr.c 13.5 KB