[dpdk-dev] [PATCH v9 2/8] net/virtio: add packed virtqueue defines
Tiwei Bie
tiwei.bie at intel.com
Thu Oct 25 11:22:37 CEST 2018
On Wed, Oct 24, 2018 at 04:32:30PM +0200, Jens Freimann wrote:
> 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)
Please add an empty line here.
> /* 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
>
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