IOC_IBASE
iova_base = readq(info->ioc_regs+IOC_IBASE) & ~0x1;
ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE) & ~0x1fffffULL;
WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE);
WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE);
DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE));