Displaying 20 results from an estimated 57 matches for "virtqueue_detach_unused_buf_pack".
Did you mean:
virtqueue_detach_unused_buf_packed
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...> > > > + desc = &vq->vring_packed.desc[i];
> > > > + vring_unmap_one_packed(vq, desc);
> > > > + desc->flags = 0x0;
> > > Looks like this is unnecessary.
> > It's safer to zero it. If we don't zero it, after we
> > call virtqueue_detach_unused_buf_packed() which calls
> > this function, the desc is still available to the
> > device.
>
> Well detach_unused_buf_packed() should be called after device is stopped,
> otherwise even if you try to clear, there will still be a window that device
> may use it.
This is not about wh...
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...> > > > + desc = &vq->vring_packed.desc[i];
> > > > + vring_unmap_one_packed(vq, desc);
> > > > + desc->flags = 0x0;
> > > Looks like this is unnecessary.
> > It's safer to zero it. If we don't zero it, after we
> > call virtqueue_detach_unused_buf_packed() which calls
> > this function, the desc is still available to the
> > device.
>
> Well detach_unused_buf_packed() should be called after device is stopped,
> otherwise even if you try to clear, there will still be a window that device
> may use it.
This is not about wh...
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...acked.desc[i];
> > > > > > + vring_unmap_one_packed(vq, desc);
> > > > > > + desc->flags = 0x0;
> > > > > Looks like this is unnecessary.
> > > > It's safer to zero it. If we don't zero it, after we
> > > > call virtqueue_detach_unused_buf_packed() which calls
> > > > this function, the desc is still available to the
> > > > device.
> > >
> > > Well detach_unused_buf_packed() should be called after device is stopped,
> > > otherwise even if you try to clear, there will still be a window...
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...acked.desc[i];
> > > > > > + vring_unmap_one_packed(vq, desc);
> > > > > > + desc->flags = 0x0;
> > > > > Looks like this is unnecessary.
> > > > It's safer to zero it. If we don't zero it, after we
> > > > call virtqueue_detach_unused_buf_packed() which calls
> > > > this function, the desc is still available to the
> > > > device.
> > >
> > > Well detach_unused_buf_packed() should be called after device is stopped,
> > > otherwise even if you try to clear, there will still be a window...
2019 Aug 10
1
[PATCH v3 2/2] virtio: decrement avail idx with buffer detach for packed ring
...| 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index c8be1c4f5b55..7c69181113e2 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -1537,6 +1537,12 @@ static void *virtqueue_detach_unused_buf_packed(struct virtqueue *_vq)
> /* detach_buf clears data, so grab it now. */
> buf = vq->packed.desc_state[i].data;
> detach_buf_packed(vq, i, NULL);
> + vq->packed.next_avail_idx--;
> + if (vq->packed.next_avail_idx < 0) {
> + vq->packed.next_avail_idx = v...
2019 Aug 12
1
[PATCH v3 2/2] virtio: decrement avail idx with buffer detach for packed ring
...| 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index c8be1c4f5b55..7c69181113e2 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -1537,6 +1537,12 @@ static void *virtqueue_detach_unused_buf_packed(struct virtqueue *_vq)
> /* detach_buf clears data, so grab it now. */
> buf = vq->packed.desc_state[i].data;
> detach_buf_packed(vq, i, NULL);
> + vq->packed.next_avail_idx--;
> + if (vq->packed.next_avail_idx < 0) {
> + vq->packed.next_avail_idx...
2019 Aug 09
5
[PATCH v3 0/2] virtio_console: fix replug of virtio console port
This patch series fixes the issue with unplug/replug of a port in virtio
console driver which fails with an error "Error allocating inbufs\n".
Patch 1 makes use of 'virtqueue_detach_unused_buf' function to detach
the unused buffers during port hotunplug time.
Patch 2 updates the next avail index for packed ring code.
Tested the packed ring code with the qemu virtio 1.1 device
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...> + vring_unmap_one_packed(vq, desc);
> > > > > > > > + desc->flags = 0x0;
> > > > > > > Looks like this is unnecessary.
> > > > > > It's safer to zero it. If we don't zero it, after we
> > > > > > call virtqueue_detach_unused_buf_packed() which calls
> > > > > > this function, the desc is still available to the
> > > > > > device.
> > > > >
> > > > > Well detach_unused_buf_packed() should be called after device is stopped,
> > > > > otherwise even...
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...> + vring_unmap_one_packed(vq, desc);
> > > > > > > > + desc->flags = 0x0;
> > > > > > > Looks like this is unnecessary.
> > > > > > It's safer to zero it. If we don't zero it, after we
> > > > > > call virtqueue_detach_unused_buf_packed() which calls
> > > > > > this function, the desc is still available to the
> > > > > > device.
> > > > >
> > > > > Well detach_unused_buf_packed() should be called after device is stopped,
> > > > > otherwise even...
2023 Jun 02
12
[PATCH vhost v10 00/10] virtio core prepares for AF_XDP
## About DMA APIs
Now, virtio may can not work with DMA APIs when virtio features do not have
VIRTIO_F_ACCESS_PLATFORM.
1. I tried to let DMA APIs return phy address by virtio-device. But DMA APIs just
work with the "real" devices.
2. I tried to let xsk support callballs to get phy address from virtio-net
driver as the dma address. But the maintainers of xsk may want to use
2023 Jun 02
12
[PATCH vhost v10 00/10] virtio core prepares for AF_XDP
## About DMA APIs
Now, virtio may can not work with DMA APIs when virtio features do not have
VIRTIO_F_ACCESS_PLATFORM.
1. I tried to let DMA APIs return phy address by virtio-device. But DMA APIs just
work with the "real" devices.
2. I tried to let xsk support callballs to get phy address from virtio-net
driver as the dma address. But the maintainers of xsk may want to use
2018 Apr 17
0
[RFC v2] virtio: support packed ring
...esc = &vq->vring_packed.desc[i];
> > > > > + vring_unmap_one_packed(vq, desc);
> > > > > + desc->flags = 0x0;
> > > > Looks like this is unnecessary.
> > > It's safer to zero it. If we don't zero it, after we
> > > call virtqueue_detach_unused_buf_packed() which calls
> > > this function, the desc is still available to the
> > > device.
> >
> > Well detach_unused_buf_packed() should be called after device is stopped,
> > otherwise even if you try to clear, there will still be a window that device
> > may...
2018 Apr 17
0
[RFC v2] virtio: support packed ring
...> > > > > + vring_unmap_one_packed(vq, desc);
> > > > > > > + desc->flags = 0x0;
> > > > > > Looks like this is unnecessary.
> > > > > It's safer to zero it. If we don't zero it, after we
> > > > > call virtqueue_detach_unused_buf_packed() which calls
> > > > > this function, the desc is still available to the
> > > > > device.
> > > >
> > > > Well detach_unused_buf_packed() should be called after device is stopped,
> > > > otherwise even if you try to clear, ther...
2019 Aug 08
0
[PATCH v2 2/2] virtio_ring: packed ring: fix virtqueue_detach_unused_buf
...t;
---
drivers/virtio/virtio_ring.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index c8be1c4f5b55..1b98a6777b7e 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1534,6 +1534,11 @@ static void *virtqueue_detach_unused_buf_packed(struct virtqueue *_vq)
for (i = 0; i < vq->packed.vring.num; i++) {
if (!vq->packed.desc_state[i].data)
continue;
+ vq->packed.next_avail_idx--;
+ if (vq->packed.next_avail_idx < 0) {
+ vq->packed.next_avail_idx = vq->packed.vring.num - 1;
+ vq->packed.av...
2019 Aug 09
0
[PATCH v3 2/2] virtio: decrement avail idx with buffer detach for packed ring
...;
---
drivers/virtio/virtio_ring.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index c8be1c4f5b55..7c69181113e2 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1537,6 +1537,12 @@ static void *virtqueue_detach_unused_buf_packed(struct virtqueue *_vq)
/* detach_buf clears data, so grab it now. */
buf = vq->packed.desc_state[i].data;
detach_buf_packed(vq, i, NULL);
+ vq->packed.next_avail_idx--;
+ if (vq->packed.next_avail_idx < 0) {
+ vq->packed.next_avail_idx = vq->packed.vring.num - 1;
+...
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...> > > > + desc = &vq->vring_packed.desc[i];
> > > > + vring_unmap_one_packed(vq, desc);
> > > > + desc->flags = 0x0;
> > > Looks like this is unnecessary.
> > It's safer to zero it. If we don't zero it, after we
> > call virtqueue_detach_unused_buf_packed() which calls
> > this function, the desc is still available to the
> > device.
>
> Well detach_unused_buf_packed() should be called after device is stopped,
> otherwise even if you try to clear, there will still be a window that device
> may use it.
>
> >
>...
2018 Apr 17
2
[RFC v2] virtio: support packed ring
...> > > > + desc = &vq->vring_packed.desc[i];
> > > > + vring_unmap_one_packed(vq, desc);
> > > > + desc->flags = 0x0;
> > > Looks like this is unnecessary.
> > It's safer to zero it. If we don't zero it, after we
> > call virtqueue_detach_unused_buf_packed() which calls
> > this function, the desc is still available to the
> > device.
>
> Well detach_unused_buf_packed() should be called after device is stopped,
> otherwise even if you try to clear, there will still be a window that device
> may use it.
>
> >
>...
2018 Apr 13
3
[RFC v2] virtio: support packed ring
...or (j = 0; j < vq->desc_state[head].num; j++) {
> > + desc = &vq->vring_packed.desc[i];
> > + vring_unmap_one_packed(vq, desc);
> > + desc->flags = 0x0;
>
> Looks like this is unnecessary.
It's safer to zero it. If we don't zero it, after we
call virtqueue_detach_unused_buf_packed() which calls
this function, the desc is still available to the
device.
>
> > + i++;
> > + if (i >= vq->vring_packed.num)
> > + i = 0;
> > + }
[...]
> > +static unsigned virtqueue_enable_cb_prepare_packed(struct virtqueue *_vq)
> > +{
> > +...
2018 Apr 13
3
[RFC v2] virtio: support packed ring
...or (j = 0; j < vq->desc_state[head].num; j++) {
> > + desc = &vq->vring_packed.desc[i];
> > + vring_unmap_one_packed(vq, desc);
> > + desc->flags = 0x0;
>
> Looks like this is unnecessary.
It's safer to zero it. If we don't zero it, after we
call virtqueue_detach_unused_buf_packed() which calls
this function, the desc is still available to the
device.
>
> > + i++;
> > + if (i >= vq->vring_packed.num)
> > + i = 0;
> > + }
[...]
> > +static unsigned virtqueue_enable_cb_prepare_packed(struct virtqueue *_vq)
> > +{
> > +...
2023 Jun 22
1
[PATCH vhost v10 05/10] virtio_ring: split-detach: support return dma info to driver
...> + virtqueue_get_buf_ctx_split(_vq, len, ctx, NULL);
> }
> EXPORT_SYMBOL_GPL(virtqueue_get_buf_ctx);
>
> @@ -2493,7 +2591,7 @@ void *virtqueue_detach_unused_buf(struct virtqueue *_vq)
> struct vring_virtqueue *vq = to_vvq(_vq);
>
> return vq->packed_ring ? virtqueue_detach_unused_buf_packed(_vq) :
> - virtqueue_detach_unused_buf_split(_vq);
> + virtqueue_detach_unused_buf_split(_vq, NULL);
> }
> EXPORT_SYMBOL_GPL(virtqueue_detach_unused_buf);
>
> diff --git a/include/linux/virtio.h b/include/linux/virtio.h
> index 1fc0e1023bd4..eb4a4e4329aa 100644
&g...