• Ben Hutchings's avatar
    sfc: Add SR-IOV back-end support for SFC9000 family · cd2d5b52
    Ben Hutchings authored
    On the SFC9000 family, each port has 1024 Virtual Interfaces (VIs),
    each with an RX queue, a TX queue, an event queue and a mailbox
    register.  These may be assigned to up to 127 SR-IOV virtual functions
    per port, with up to 64 VIs per VF.
    
    We allocate an extra channel (IRQ and event queue only) to receive
    requests from VF drivers.
    
    There is a per-port limit of 4 concurrent RX queue flushes, and queue
    flushes may be initiated by the MC in response to a Function Level
    Reset (FLR) of a VF.  Therefore, when SR-IOV is in use, we submit all
    flush requests via the MC.
    
    The RSS indirection table is shared with VFs, so the number of RX
    queues used in the PF is limited to the number of VIs per VF.
    
    This is almost entirely the work of Steve Hodgson, formerly
    shodgson@solarflare.com.
    Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
    cd2d5b52
efx.c 72.7 KB