SCU_UNSOLICITED_FRAME_BUFFER_SIZE
SCU_UNSOLICITED_FRAME_BUFFER_SIZE/4);
virt += SCU_UNSOLICITED_FRAME_BUFFER_SIZE;
dma += SCU_UNSOLICITED_FRAME_BUFFER_SIZE;
#define SCI_UFI_BUF_SIZE (SCU_MAX_UNSOLICITED_FRAMES * SCU_UNSOLICITED_FRAME_BUFFER_SIZE)