Re: [dpdk-dev] [PATCH v8 01/15] vhost: add virtio packed virtqueue defines

[Tiwei Bie <tiwei.bie@intel.com>]

On Thu, Jul 05, 2018 at 11:07:27PM +0200, Maxime Coquelin wrote:
> From: Jens Freimann <jfreimann@redhat.com>
> 
> Signed-off-by: Jens Freimann <jfreimann@redhat.com>
> ---
>  lib/librte_vhost/vhost.h | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
> index 79e3117d2..4fc804bd8 100644
> --- a/lib/librte_vhost/vhost.h
> +++ b/lib/librte_vhost/vhost.h
> @@ -192,6 +192,26 @@ struct vhost_msg {
>   #define VIRTIO_F_VERSION_1 32
>  #endif
>  
> +/* Declare packed ring related bits for older kernels */
> +#ifndef VIRTIO_F_RING_PACKED
> +
> +#define VIRTIO_F_RING_PACKED 34
> +
> +#define VRING_DESC_F_NEXT			1
> +#define VRING_DESC_F_WRITE			2
> +#define VRING_DESC_F_INDIRECT		4
> +
> +#define VRING_DESC_F_AVAIL			(1ULL << 7)
> +#define VRING_DESC_F_USED			(1ULL << 15)
> +
> +struct vring_desc_packed {

Maybe vring_packed_desc will be more consistent with
vring_packed_desc_event and vring_packed. Jason also
planned to change the name to vring_packed_desc [1].

[1] https://lkml.org/lkml/2018/7/4/36

Best regards,
Tiwei Bie

> +	uint64_t addr;
> +	uint32_t len;
> +	uint16_t id;
> +	uint16_t flags;
> +};
> +#endif
> +
>  /*
>   * Available and used descs are in same order
>   */
> -- 
> 2.14.4
>