vduse: implement vdpa_config_ops.get_vq_size for vduse

This commit implements get_vq_size for vdpa_config_ops. This
new interface is used to report per vq size.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240202163905.8834-8-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 75354ce186a15c900e0deee3cb73cdf7e9aacc6e..73c89701fc9d403183387e69b3b62e1e8e90db05 100644 (file)
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -541,6 +541,17 @@ static void vduse_vdpa_set_vq_num(struct vdpa_device *vdpa, u16 idx, u32 num)
        vq->num = num;
 }
 
+static u16 vduse_vdpa_get_vq_size(struct vdpa_device *vdpa, u16 idx)
+{
+       struct vduse_dev *dev = vdpa_to_vduse(vdpa);
+       struct vduse_virtqueue *vq = dev->vqs[idx];
+
+       if (vq->num)
+               return vq->num;
+       else
+               return vq->num_max;
+}
+
 static void vduse_vdpa_set_vq_ready(struct vdpa_device *vdpa,
                                        u16 idx, bool ready)
 {
@@ -773,6 +784,7 @@ static const struct vdpa_config_ops vduse_vdpa_config_ops = {
        .kick_vq                = vduse_vdpa_kick_vq,
        .set_vq_cb              = vduse_vdpa_set_vq_cb,
        .set_vq_num             = vduse_vdpa_set_vq_num,
+       .get_vq_size            = vduse_vdpa_get_vq_size,
        .set_vq_ready           = vduse_vdpa_set_vq_ready,
        .get_vq_ready           = vduse_vdpa_get_vq_ready,
        .set_vq_state           = vduse_vdpa_set_vq_state,