[dpdk-dev] [PATCH v9 2/8] net/virtio: add packed virtqueue defines

Jens Freimann jfreimann at redhat.com
Wed Oct 24 16:32:30 CEST 2018


Signed-off-by: Jens Freimann <jfreimann at redhat.com>
---
 drivers/net/virtio/virtio_ring.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_ring.h b/drivers/net/virtio/virtio_ring.h
index e65da100b..f84ab5e34 100644
--- a/drivers/net/virtio/virtio_ring.h
+++ b/drivers/net/virtio/virtio_ring.h
@@ -15,7 +15,10 @@
 #define VRING_DESC_F_WRITE      2
 /* This means the buffer contains a list of buffer descriptors. */
 #define VRING_DESC_F_INDIRECT   4
-
+/* This flag means the descriptor was made available by the driver */
+#define VRING_DESC_F_AVAIL(b)   ((uint16_t)(b) << 7)
+/* This flag means the descriptor was used by the device */
+#define VRING_DESC_F_USED(b)    ((uint16_t)(b) << 15)
 /* The Host uses this in used->flags to advise the Guest: don't kick me
  * when you add a buffer.  It's unreliable, so it's simply an
  * optimization.  Guest will still kick if it's out of buffers. */
-- 
2.17.1



More information about the dev mailing list