• Huazhong Tan's avatar
    net: hns3: add reset handling for VF when doing PF reset · aa5c4f17
    Huazhong Tan authored
    When PF performs a function reset, the hardware will reset both PF
    and all the VF belong to this PF. Hence, both PF's driver and VF's
    driver need to perform corresponding reset operations.
    
    Before PF driver asserting function reset to hardware, it firstly
    set up VF's hardware reset status, and inform the VF driver with
    HNAE3_VF_PF_FUNC_RESET, then VF driver sets this reset type to
    reset_pending and shechule reset task to stop IO and waits for the
    hardware reset status to clear. When PF driver has reinitialized the
    hardware and is ready to process mailbox from VF, PF driver clears
    VF's hardware reset status for VF to continue its reset process.
    
    Also, this patch uses readl_poll_timeout to simplify the hardware reset
    status waitting.
    Signed-off-by: default avatarHuazhong Tan <tanhuazhong@huawei.com>
    Signed-off-by: default avatarYunsheng Lin <linyunsheng@huawei.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    aa5c4f17
hnae3.h 17.9 KB