VMXNET3_REG_IMR
VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_IMR