MAX_IOCB_MB_REG
#define SIZEOF_IOCB_MB_REG (MAX_IOCB_MB_REG * sizeof(uint16_t))
u16 in_mb[MAX_IOCB_MB_REG]; /* from FW */
u16 out_mb[MAX_IOCB_MB_REG]; /* to FW */
uint16_t mb[MAX_IOCB_MB_REG];