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    SubjectRe: [PATCH v2 04/13] Connection Manager
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    On Mon, 2006-12-04 at 07:45 -0800, Roland Dreier wrote:
    > > Could you convince network core developers that it is not own TCP
    > > implementation which will mess with existing one?
    >
    > I'm not qualified to comment on this...
    >

    I don't understand your question?

    > > This and a lot of other changes in this driver definitely says you
    > > implement your own stack of protocols on top of infiniband hardware.
    >
    > ...but I do know this driver is for 10-gig ethernet HW.
    >

    There is no SW TCP stack in this driver. The HW supports RDMA over
    TCP/IP/10GbE in HW and this is required for zero-copy RDMA over Ethernet
    (aka iWARP). The device is a 10 GbE device, not Infiniband. The
    Ethernet driver, upon which the rdma driver depends, acts both like a
    traditional Ethernet NIC for the Linux stack as well as a TCP offload
    device for the RDMA driver allowing establishment of RDMA connections.
    The Connection Manager (patch 04/13) sends/receives messages from the
    Ethernet driver that sets up HW TCP connections for doing RDMA. While
    this is indeed implementing TCP offload, it is _not_ integrating it with
    the sockets layer nor the linux stack and offloading sockets
    connections. Its only supporting offload connections for the RDMA
    driver to do iWARP. The Ammasso device is another example of this
    (drivers/infiniband/hw/amso1100). Deep iSCSI adapters are another
    example of this.


    Steve.


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