• Michael Chan's avatar
    bnxt_en: Add interface to support RDMA driver. · a588e458
    Michael Chan authored
    Since the network driver and RDMA driver operate on the same PCI function,
    we need to create an interface to allow the RDMA driver to share resources
    with the network driver.
    
    1. Create a new bnxt_en_dev struct which will be returned by
    bnxt_ulp_probe() upon success.  After that, all calls from the RDMA driver
    to bnxt_en will pass a pointer to this struct.
    
    2. This struct contains additional function pointers to register, request
    msix, send fw messages, register for async events.
    
    3. If the RDMA driver wants to enable RDMA on the function, it needs to
    call the function pointer bnxt_register_device().  A ulp_ops structure
    is passed for RCU protected upcalls from bnxt_en to the RDMA driver.
    
    4. The RDMA driver can call firmware APIs using the bnxt_send_fw_msg()
    function pointer.
    
    5. 1 stats context is reserved when the RDMA driver registers.  MSIX
    and completion rings are reserved when the RDMA driver calls
    bnxt_request_msix() function pointer.
    
    6. When the RDMA driver calls bnxt_unregister_device(), all RDMA resources
    will be cleaned up.
    
    v2: Fixed 2 uninitialized variable warnings.
    Signed-off-by: default avatarSomnath Kotur <somnath.kotur@broadcom.com>
    Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    a588e458
bnxt.c 184 KB