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remoteproc: virtio: Anchor vring life cycle in vdev 

Instead of having the vrings being allocated and freed as they are
requested by the virtio device tie their life cycle to the vdev
resource. This allows us to decouple the vdev resource management from
the virtio device management.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
hifive-unleashed-5.1
Bjorn Andersson 2016-10-19 19:40:07 -07:00
parent aab8d80223
commit a863af5d41
2 changed files with 21 additions and 6 deletions
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20
drivers/remoteproc/remoteproc_core.c
View File

@ -370,6 +370,13 @@ static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
/* remember the resource offset*/
rvdev->rsc_offset = offset;
/* allocate the vring resources */
for (i = 0; i < rsc->num_of_vrings; i++) {
ret = rproc_alloc_vring(rvdev, i);
if (ret)
goto unwind_vring_allocations;
}
list_add_tail(&rvdev->node, &rproc->rvdevs);
/* it is now safe to add the virtio device */
@ -379,6 +386,9 @@ static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
return 0;
unwind_vring_allocations:
for (i--; i >= 0; i--)
rproc_free_vring(&rvdev->vring[i]);
remove_rvdev:
list_del(&rvdev->node);
free_rvdev:
@ -389,6 +399,16 @@ free_rvdev:
void rproc_vdev_release(struct kref *ref)
{
struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount);
struct rproc_vring *rvring;
int id;
for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) {
rvring = &rvdev->vring[id];
if (!rvring->va)
continue;
rproc_free_vring(rvring);
}
list_del(&rvdev->node);
kfree(rvdev);

7
drivers/remoteproc/remoteproc_virtio.c
View File

@ -79,7 +79,7 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
struct rproc_vring *rvring;
struct virtqueue *vq;
void *addr;
int len, size, ret;
int len, size;
/* we're temporarily limited to two virtqueues per rvdev */
if (id >= ARRAY_SIZE(rvdev->vring))
@ -88,10 +88,6 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
if (!name)
return NULL;
ret = rproc_alloc_vring(rvdev, id);
if (ret)
return ERR_PTR(ret);
rvring = &rvdev->vring[id];
addr = rvring->va;
len = rvring->len;
@ -130,7 +126,6 @@ static void __rproc_virtio_del_vqs(struct virtio_device *vdev)
rvring = vq->priv;
rvring->vq = NULL;
vring_del_virtqueue(vq);
rproc_free_vring(rvring);
}
}