[dpdk-stable] [PATCH 08/15] net/virtio: add virtio vDPA op to get features

[Maxime Coquelin <maxime.coquelin@redhat.com>]

This patch implements the vDPA .get_features() callback.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 drivers/net/virtio/virtio_vdpa.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/net/virtio/virtio_vdpa.c b/drivers/net/virtio/virtio_vdpa.c
index 07ff1e090..9e2af8313 100644
--- a/drivers/net/virtio/virtio_vdpa.c
+++ b/drivers/net/virtio/virtio_vdpa.c
@@ -173,8 +173,40 @@ virtio_vdpa_get_queue_num(int did, uint32_t *queue_num)
 	return 0;
 }
 
+static int
+virtio_vdpa_get_features(int did, uint64_t *features)
+{
+	struct internal_list *list;
+	struct virtio_vdpa_device *dev;
+
+	list = find_internal_resource_by_did(did);
+	if (list == NULL) {
+		DRV_LOG(ERR, "Invalid device id: %d", did);
+		return -1;
+	}
+
+	dev = list->dev;
+
+	*features = VTPCI_OPS(&dev->hw)->get_features(&dev->hw);
+
+	if (!(*features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) {
+		DRV_LOG(ERR, "Device does not support IOMMU");
+		return -1;
+	}
+
+	if (*features & (1ULL << VIRTIO_NET_F_CTRL_VQ))
+		dev->has_ctrl_vq = true;
+	else
+		dev->has_ctrl_vq = false;
+
+	*features |= (1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
+
+	return 0;
+}
+
 static struct rte_vdpa_dev_ops virtio_vdpa_ops = {
 	.get_queue_num = virtio_vdpa_get_queue_num,
+	.get_features = virtio_vdpa_get_features,
 };
 
 static inline int
-- 
2.21.0