[dpdk-dev] [PATCH v6 01/13] vhost: add packed ring indexes increasing function

[Marvin Liu <yong.liu@intel.com>]

When vhost doing [de]nqueue, vq's local variable last_[used/avail]_idx
will be inceased. Adding inline functions can avoid duplicated codes.

Signed-off-by: Marvin Liu <yong.liu@intel.com>

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 5131a97a3..22a3ddc38 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -350,6 +350,26 @@ desc_is_avail(struct vring_packed_desc *desc, bool wrap_counter)
 		wrap_counter != !!(flags & VRING_DESC_F_USED);
 }
 
+static inline void
+vq_inc_last_used_packed(struct vhost_virtqueue *vq, uint16_t num)
+{
+	vq->last_used_idx += num;
+	if (vq->last_used_idx >= vq->size) {
+		vq->used_wrap_counter ^= 1;
+		vq->last_used_idx -= vq->size;
+	}
+}
+
+static inline void
+vq_inc_last_avail_packed(struct vhost_virtqueue *vq, uint16_t num)
+{
+	vq->last_avail_idx += num;
+	if (vq->last_avail_idx >= vq->size) {
+		vq->avail_wrap_counter ^= 1;
+		vq->last_avail_idx -= vq->size;
+	}
+}
+
 void __vhost_log_cache_write(struct virtio_net *dev,
 		struct vhost_virtqueue *vq,
 		uint64_t addr, uint64_t len);
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 5b85b832d..42b662080 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -140,11 +140,7 @@ flush_shadow_used_ring_packed(struct virtio_net *dev,
 			head_flags = flags;
 		}
 
-		vq->last_used_idx += vq->shadow_used_packed[i].count;
-		if (vq->last_used_idx >= vq->size) {
-			vq->used_wrap_counter ^= 1;
-			vq->last_used_idx -= vq->size;
-		}
+		vq_inc_last_used_packed(vq, vq->shadow_used_packed[i].count);
 	}
 
 	vq->desc_packed[head_idx].flags = head_flags;
@@ -865,11 +861,7 @@ virtio_dev_rx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
 			break;
 		}
 
-		vq->last_avail_idx += nr_descs;
-		if (vq->last_avail_idx >= vq->size) {
-			vq->last_avail_idx -= vq->size;
-			vq->avail_wrap_counter ^= 1;
-		}
+		vq_inc_last_avail_packed(vq, nr_descs);
 	}
 
 	do_data_copy_enqueue(dev, vq);
@@ -1504,11 +1496,7 @@ virtio_dev_tx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
 			TAILQ_INSERT_TAIL(&vq->zmbuf_list, zmbuf, next);
 		}
 
-		vq->last_avail_idx += desc_count;
-		if (vq->last_avail_idx >= vq->size) {
-			vq->last_avail_idx -= vq->size;
-			vq->avail_wrap_counter ^= 1;
-		}
+		vq_inc_last_avail_packed(vq, desc_count);
 	}
 
 	if (likely(dev->dequeue_zero_copy == 0)) {
-- 
2.17.1