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authorLuca Coelho <luciano.coelho@intel.com>2016-05-10 10:30:56 +0300
committerLuca Coelho <luciano.coelho@intel.com>2016-05-10 10:30:56 +0300
commitbae6692c24236d0203f88a444986d86437a858fa (patch)
tree0f9bee1250af3046fa46049736b615b81e60f56e /include/linux/virtio_ring.h
parent46167a8fd4248533ad15867e6988ff20e76de641 (diff)
parent57fbcce37be7c1d2622b56587c10ade00e96afa3 (diff)
Merge tag 'mac80211-next-for-davem-2016-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next into master
To synchronize with Kalle, here's just a big change that affects all drivers - removing the duplicated enum ieee80211_band and replacing it by enum nl80211_band. On top of that, just a small documentation update.
Diffstat (limited to 'include/linux/virtio_ring.h')
-rw-r--r--include/linux/virtio_ring.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index a156e2b6ccfe..e8d36938f09a 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -59,6 +59,35 @@ static inline void virtio_store_mb(bool weak_barriers,
struct virtio_device;
struct virtqueue;
+/*
+ * Creates a virtqueue and allocates the descriptor ring. If
+ * may_reduce_num is set, then this may allocate a smaller ring than
+ * expected. The caller should query virtqueue_get_ring_size to learn
+ * the actual size of the ring.
+ */
+struct virtqueue *vring_create_virtqueue(unsigned int index,
+ unsigned int num,
+ unsigned int vring_align,
+ struct virtio_device *vdev,
+ bool weak_barriers,
+ bool may_reduce_num,
+ bool (*notify)(struct virtqueue *vq),
+ void (*callback)(struct virtqueue *vq),
+ const char *name);
+
+/* Creates a virtqueue with a custom layout. */
+struct virtqueue *__vring_new_virtqueue(unsigned int index,
+ struct vring vring,
+ struct virtio_device *vdev,
+ bool weak_barriers,
+ bool (*notify)(struct virtqueue *),
+ void (*callback)(struct virtqueue *),
+ const char *name);
+
+/*
+ * Creates a virtqueue with a standard layout but a caller-allocated
+ * ring.
+ */
struct virtqueue *vring_new_virtqueue(unsigned int index,
unsigned int num,
unsigned int vring_align,
@@ -68,7 +97,13 @@ struct virtqueue *vring_new_virtqueue(unsigned int index,
bool (*notify)(struct virtqueue *vq),
void (*callback)(struct virtqueue *vq),
const char *name);
+
+/*
+ * Destroys a virtqueue. If created with vring_create_virtqueue, this
+ * also frees the ring.
+ */
void vring_del_virtqueue(struct virtqueue *vq);
+
/* Filter out transport-specific feature bits. */
void vring_transport_features(struct virtio_device *vdev);