[dpdk-dev] [RFC 07/14] vhost: remove useless fields in async iterator struct

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

Offset and count fields are unused and so can be removed.
The offset field was actually in the Vhost example, but
in a way that does not make sense.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 examples/vhost/ioat.c       |  6 ++----
 lib/vhost/rte_vhost_async.h |  4 ----
 lib/vhost/virtio_net.c      | 19 ++++---------------
 3 files changed, 6 insertions(+), 23 deletions(-)

diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c
index dcbcf65e4e..a8c588deff 100644
--- a/examples/vhost/ioat.c
+++ b/examples/vhost/ioat.c
@@ -142,10 +142,8 @@ ioat_transfer_data_cb(int vid, uint16_t queue_id,
 				break;
 			while (i_seg < iter->nr_segs) {
 				rte_ioat_enqueue_copy(dev_id,
-					(uintptr_t)(iter->iov[i_seg].src_addr)
-						+ iter->offset,
-					(uintptr_t)(iter->iov[i_seg].dst_addr)
-						+ iter->offset,
+					(uintptr_t)(iter->iov[i_seg].src_addr),
+					(uintptr_t)(iter->iov[i_seg].dst_addr),
 					iter->iov[i_seg].len,
 					0,
 					0);
diff --git a/lib/vhost/rte_vhost_async.h b/lib/vhost/rte_vhost_async.h
index d7bb77bf90..4ea5cfab10 100644
--- a/lib/vhost/rte_vhost_async.h
+++ b/lib/vhost/rte_vhost_async.h
@@ -20,10 +20,6 @@ struct rte_vhost_iovec {
  * iovec iterator
  */
 struct rte_vhost_iov_iter {
-	/** offset to the first byte of interesting data */
-	size_t offset;
-	/** total bytes of data in this iterator */
-	size_t count;
 	/** pointer to the iovec array */
 	struct rte_vhost_iovec *iov;
 	/** number of iovec in this iterator */
diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 7b1c52ea7d..ae7dded979 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -933,19 +933,10 @@ async_fill_vec(struct rte_vhost_iovec *v, void *src, void *dst, size_t len)
 }
 
 static __rte_always_inline void
-async_fill_iter(struct rte_vhost_iov_iter *it, size_t count,
-	struct rte_vhost_iovec *vec, unsigned long nr_seg)
+async_fill_iter(struct rte_vhost_iov_iter *it, struct rte_vhost_iovec *vec, unsigned long nr_seg)
 {
-	it->offset = 0;
-	it->count = count;
-
-	if (count) {
-		it->iov = vec;
-		it->nr_segs = nr_seg;
-	} else {
-		it->iov = 0;
-		it->nr_segs = 0;
-	}
+	it->iov = vec;
+	it->nr_segs = nr_seg;
 }
 
 static __rte_always_inline void
@@ -971,7 +962,6 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
 	uint32_t cpy_len, buf_len;
 	int error = 0;
 
-	uint32_t tlen = 0;
 	int tvec_idx = 0;
 	void *hpa;
 
@@ -1076,7 +1066,6 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
 				(void *)(uintptr_t)rte_pktmbuf_iova_offset(m,
 				mbuf_offset), hpa, (size_t)mapped_len);
 
-			tlen += (uint32_t)mapped_len;
 			cpy_len -= (uint32_t)mapped_len;
 			mbuf_avail  -= (uint32_t)mapped_len;
 			mbuf_offset += (uint32_t)mapped_len;
@@ -1086,7 +1075,7 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
 		}
 	}
 
-	async_fill_iter(iter, tlen, iovec, tvec_idx);
+	async_fill_iter(iter, iovec, tvec_idx);
 out:
 	return error;
 }
-- 
2.31.1