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>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 67f581d0c488..bb78316f8120 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -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);