This will come in handy soon when we pull out the indicators from
virtio_ccw_device to a memory area that is shared with the hypervisor
(in particular for protected virtualization guests).
Signed-off-by: Halil Pasic <pasic@xxxxxxxxxxxxx>
---
drivers/s390/virtio/virtio_ccw.c | 46 ++++++++++++++++++++++++----------------
1 file changed, 28 insertions(+), 18 deletions(-)
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
index 9c412a581a50..156166ae4df4 100644
--- a/drivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -71,6 +71,16 @@ struct virtio_ccw_device {
__u64 dma_mask;
};
+static inline unsigned long *indicators(struct virtio_ccw_device *vcdev)
+{
+ return &vcdev->indicators;
+}
+
+static inline unsigned long *indicators2(struct virtio_ccw_device *vcdev)
+{
+ return &vcdev->indicators2;
+}
+
struct vq_info_block_legacy {
__u64 queue;
__u32 align;
@@ -364,17 +374,17 @@ static void virtio_ccw_drop_indicator(struct virtio_ccw_device *vcdev,
} else {
/* payload is the address of the indicators */
indicatorp = __vc_dma_alloc(&vcdev->vdev,
- sizeof(&vcdev->indicators),
+ sizeof(indicators(vcdev)),
&indicatorp_dma_addr);
if (!indicatorp)
return;
*indicatorp = 0;
ccw->cmd_code = CCW_CMD_SET_IND;
- ccw->count = sizeof(&vcdev->indicators);
+ ccw->count = sizeof(indicators(vcdev));
ccw->cda = (__u32)(unsigned long) indicatorp;
}
/* Deregister indicators from host. */
- vcdev->indicators = 0;
+ *indicators(vcdev) = 0;
ccw->flags = 0;
ret = ccw_io_helper(vcdev, ccw,
vcdev->is_thinint ?
@@ -386,7 +396,7 @@ static void virtio_ccw_drop_indicator(struct virtio_ccw_device *vcdev,
else if (vcdev->is_thinint)
virtio_ccw_drop_indicators(vcdev);
if (indicatorp)
- __vc_dma_free(&vcdev->vdev, sizeof(&vcdev->indicators),
+ __vc_dma_free(&vcdev->vdev, sizeof(indicators(vcdev)),
indicatorp, indicatorp_dma_addr);
vc_dma_free_struct(&vcdev->vdev, thinint_area);
}
@@ -682,11 +692,11 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
* We need a data area under 2G to communicate. Our payload is
* the address of the indicators.
*/
- indicatorp = __vc_dma_alloc(&vcdev->vdev, sizeof(&vcdev->indicators),
+ indicatorp = __vc_dma_alloc(&vcdev->vdev, sizeof(indicators(vcdev)),
&indicatorp_dma_addr);
if (!indicatorp)
goto out;
- *indicatorp = (unsigned long) &vcdev->indicators;
+ *indicatorp = (unsigned long) indicators(vcdev);
if (vcdev->is_thinint) {
ret = virtio_ccw_register_adapter_ind(vcdev, vqs, nvqs, ccw);
if (ret)
@@ -695,34 +705,34 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
}
if (!vcdev->is_thinint) {
/* Register queue indicators with host. */
- vcdev->indicators = 0;
+ *indicators(vcdev) = 0;
ccw->cmd_code = CCW_CMD_SET_IND;
ccw->flags = 0;
- ccw->count = sizeof(&vcdev->indicators);
+ ccw->count = sizeof(indicators(vcdev));
ccw->cda = (__u32)(unsigned long) indicatorp;
ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_IND);
if (ret)
goto out;
}
/* Register indicators2 with host for config changes */
- *indicatorp = (unsigned long) &vcdev->indicators2;
- vcdev->indicators2 = 0;
+ *indicatorp = (unsigned long) indicators2(vcdev);
+ *indicators2(vcdev) = 0;
ccw->cmd_code = CCW_CMD_SET_CONF_IND;
ccw->flags = 0;
- ccw->count = sizeof(&vcdev->indicators2);
+ ccw->count = sizeof(indicators2(vcdev));
ccw->cda = (__u32)(unsigned long) indicatorp;
ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_CONF_IND);
if (ret)
goto out;
if (indicatorp)
- __vc_dma_free(&vcdev->vdev, sizeof(&vcdev->indicators),
+ __vc_dma_free(&vcdev->vdev, sizeof(indicators(vcdev)),
indicatorp, indicatorp_dma_addr);
vc_dma_free_struct(vdev, ccw);
return 0;
out:
if (indicatorp)
- __vc_dma_free(&vcdev->vdev, sizeof(&vcdev->indicators),
+ __vc_dma_free(&vcdev->vdev, sizeof(indicators(vcdev)),
indicatorp, indicatorp_dma_addr);
vc_dma_free_struct(vdev, ccw);
virtio_ccw_del_vqs(vdev);
@@ -1131,17 +1141,17 @@ static void virtio_ccw_int_handler(struct ccw_device *cdev,
vcdev->err = -EIO;
}
virtio_ccw_check_activity(vcdev, activity);
- for_each_set_bit(i, &vcdev->indicators,
- sizeof(vcdev->indicators) * BITS_PER_BYTE) {
+ for_each_set_bit(i, indicators(vcdev),
+ sizeof(*indicators(vcdev)) * BITS_PER_BYTE) {
/* The bit clear must happen before the vring kick. */
- clear_bit(i, &vcdev->indicators);
+ clear_bit(i, indicators(vcdev));
barrier();
vq = virtio_ccw_vq_by_ind(vcdev, i);
vring_interrupt(0, vq);
}
- if (test_bit(0, &vcdev->indicators2)) {
+ if (test_bit(0, indicators2(vcdev))) {
virtio_config_changed(&vcdev->vdev);
- clear_bit(0, &vcdev->indicators2);
+ clear_bit(0, indicators2(vcdev));
}
}
--
2.16.4
