> -----Original Message-----
> From: Pei, Andy <andy....@intel.com>
> Sent: Friday, September 16, 2022 2:16 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo....@intel.com>; Xu, Rosen <rosen...@intel.com>;
> Huang, Wei <wei.hu...@intel.com>; Cao, Gang <gang....@intel.com>;
> maxime.coque...@redhat.com
> Subject: [PATCH v3 7/8] vhost: vDPA blk device gets ready when any queue
> is ready
>
> When boot from virtio blk device, seabios in QEMU only enables one queue.
> To work in this scenario, vDPA BLK device back-end conf_dev when any
What is conf_dev?
> queue is ready.
>
> Signed-off-by: Andy Pei <andy....@intel.com>
> Signed-off-by: Huang Wei <wei.hu...@intel.com>
> ---
> lib/vhost/vhost_user.c | 51 ++++++++++++++++++++++++++++++++-------------
> -----
> 1 file changed, 33 insertions(+), 18 deletions(-)
>
> diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
> index 4ad28ba..9169cf5 100644
> --- a/lib/vhost/vhost_user.c
> +++ b/lib/vhost/vhost_user.c
> @@ -1449,9 +1449,10 @@
> }
>
> #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u
> +#define VIRTIO_BLK_NUM_VQS_TO_BE_READY 1u
>
> static int
> -virtio_is_ready(struct virtio_net *dev)
> +virtio_is_ready(struct virtio_net *dev, uint32_t vdpa_type)
> {
> struct vhost_virtqueue *vq;
> uint32_t i, nr_vring = dev->nr_vring;
> @@ -1462,13 +1463,20 @@
> if (!dev->nr_vring)
> return 0;
>
> - if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) {
> - nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
> -
> - if (dev->nr_vring < nr_vring)
> - return 0;
> + if (vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_NET) {
> + if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET)
> + nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
> + } else {
> + /*
> + * vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK
> + * is the only case currently
> + */
> + nr_vring = VIRTIO_BLK_NUM_VQS_TO_BE_READY;
You should consider the case when vdpa device is not there. Maybe you can
use int for vdpa_type, -1 for non-vdpa.
Also note that below check is only needed for some cases.
Thanks,
Chenbo
> }
>
> + if (dev->nr_vring < nr_vring)
> + return 0;
> +
> for (i = 0; i < nr_vring; i++) {
> vq = dev->virtqueue[i];
>
> @@ -3167,7 +3175,25 @@ static int is_vring_iotlb(struct virtio_net *dev,
> if (unlock_required)
> vhost_user_unlock_all_queue_pairs(dev);
>
> - if (ret != 0 || !virtio_is_ready(dev))
> + if (ret != 0)
> + goto out;
> +
> + vdpa_dev = dev->vdpa_dev;
> + if (vdpa_dev) {
> + if (vdpa_dev->ops->get_dev_type) {
> + ret = vdpa_dev->ops->get_dev_type(vdpa_dev, &vdpa_type);
> + if (ret) {
> + VHOST_LOG_CONFIG(dev->ifname, ERR,
> + "failed to get vdpa dev type.\n");
> + ret = -1;
> + goto out;
> + }
> + } else {
> + vdpa_type = RTE_VHOST_VDPA_DEVICE_TYPE_NET;
> + }
> + }
> +
> + if (!virtio_is_ready(dev, vdpa_type))
> goto out;
>
> /*
> @@ -3181,20 +3207,9 @@ static int is_vring_iotlb(struct virtio_net *dev,
> dev->flags |= VIRTIO_DEV_RUNNING;
> }
>
> - vdpa_dev = dev->vdpa_dev;
> if (!vdpa_dev)
> goto out;
>
> - if (vdpa_dev->ops->get_dev_type) {
> - ret = vdpa_dev->ops->get_dev_type(vdpa_dev, &vdpa_type);
> - if (ret) {
> - VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to get vdpa
> dev type.\n");
> - ret = -1;
> - goto out;
> - }
> - } else {
> - vdpa_type = RTE_VHOST_VDPA_DEVICE_TYPE_NET;
> - }
> if (vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK
> && request != VHOST_USER_SET_VRING_CALL)
> goto out;
> --
> 1.8.3.1
