• Mintz, Yuval's avatar
    qed: Reset IGU CAM to default on init · ebbdcc66
    Mintz, Yuval authored
    The IGU CAM contains an assocaition between hardware SBs
    and interrupt lines, and it can be dynamically configured
    to allow more interrupts in one entity over another, specifically
    for Re-distibution of SBs between a PF and its child VFs.
    
    While we don't yet use this functionality, there are other
    clients that do and as such its possible the information
    passed from management firmware during initialization in
    regard to the possible number of SBs doesn't accurately reflect
    the current HW configuration.
    
    The following changes are going to apply to the driver init sequence:
    
     a. PF is going to re-configure all entries belonging to itself and
        its child VFs in IGU CAM based on the management firmware info
        regarding the number of SBs that are supposed to exist there.
    
     b. PF is going to stop using the SB resource [management firmware
        provided information] for anything but the initialization.
        Instead, it would use the live-time counters it maintains for
        the numbers.
    Signed-off-by: default avatarYuval Mintz <Yuval.Mintz@cavium.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    ebbdcc66
qed_dev.c 107 KB