vq_inc_last_used_packed(vq, PACKED_BATCH_SIZE);
}
-static __rte_always_inline void
-flush_shadow_used_ring_packed(struct virtio_net *dev,
- struct vhost_virtqueue *vq)
-{
- int i;
- uint16_t used_idx = vq->last_used_idx;
- uint16_t head_idx = vq->last_used_idx;
- uint16_t head_flags = 0;
-
- /* Split loop in two to save memory barriers */
- for (i = 0; i < vq->shadow_used_idx; i++) {
- vq->desc_packed[used_idx].id = vq->shadow_used_packed[i].id;
- vq->desc_packed[used_idx].len = vq->shadow_used_packed[i].len;
-
- used_idx += vq->shadow_used_packed[i].count;
- if (used_idx >= vq->size)
- used_idx -= vq->size;
- }
-
- for (i = 0; i < vq->shadow_used_idx; i++) {
- uint16_t flags;
-
- if (vq->shadow_used_packed[i].len)
- flags = VRING_DESC_F_WRITE;
- else
- flags = 0;
-
- if (vq->used_wrap_counter) {
- flags |= VRING_DESC_F_USED;
- flags |= VRING_DESC_F_AVAIL;
- } else {
- flags &= ~VRING_DESC_F_USED;
- flags &= ~VRING_DESC_F_AVAIL;
- }
-
- if (i > 0) {
- vq->desc_packed[vq->last_used_idx].flags = flags;
-
- vhost_log_cache_used_vring(dev, vq,
- vq->last_used_idx *
- sizeof(struct vring_packed_desc),
- sizeof(struct vring_packed_desc));
- } else {
- head_idx = vq->last_used_idx;
- head_flags = flags;
- }
-
- vq_inc_last_used_packed(vq, vq->shadow_used_packed[i].count);
- }
-
- __atomic_store_n(&vq->desc_packed[head_idx].flags, head_flags,
- __ATOMIC_RELEASE);
-
- vhost_log_cache_used_vring(dev, vq,
- head_idx *
- sizeof(struct vring_packed_desc),
- sizeof(struct vring_packed_desc));
-
- vq->shadow_used_idx = 0;
- vhost_log_cache_sync(dev, vq);
-}
-
static __rte_always_inline void
vhost_shadow_dequeue_batch_packed(struct virtio_net *dev,
struct vhost_virtqueue *vq,
vq_inc_last_used_packed(vq, count);
}
-static __rte_always_inline void
-update_shadow_used_ring_packed(struct vhost_virtqueue *vq,
- uint16_t desc_idx, uint32_t len, uint16_t count)
-{
- uint16_t i = vq->shadow_used_idx++;
-
- vq->shadow_used_packed[i].id = desc_idx;
- vq->shadow_used_packed[i].len = len;
- vq->shadow_used_packed[i].count = count;
-}
-
static inline void
do_data_copy_enqueue(struct virtio_net *dev, struct vhost_virtqueue *vq)
{
}
}
-static __rte_unused void
+static __rte_always_inline void
vhost_flush_dequeue_packed(struct virtio_net *dev,
struct vhost_virtqueue *vq)
{
return -1;
}
-static __rte_unused int
+static __rte_always_inline int
virtio_dev_tx_batch_packed(struct virtio_net *dev,
struct vhost_virtqueue *vq,
struct rte_mempool *mbuf_pool,
return 0;
}
-static __rte_unused int
+static __rte_always_inline int
virtio_dev_tx_single_packed(struct virtio_net *dev,
struct vhost_virtqueue *vq,
struct rte_mempool *mbuf_pool,
return 0;
}
-static __rte_unused int
+static __rte_always_inline int
virtio_dev_tx_batch_packed_zmbuf(struct virtio_net *dev,
struct vhost_virtqueue *vq,
struct rte_mempool *mbuf_pool,
return -1;
}
-static __rte_unused int
+static __rte_always_inline int
virtio_dev_tx_single_packed_zmbuf(struct virtio_net *dev,
struct vhost_virtqueue *vq,
struct rte_mempool *mbuf_pool,
return 0;
}
-static __rte_unused void
+static __rte_always_inline void
free_zmbuf(struct vhost_virtqueue *vq)
{
struct zcopy_mbuf *next = NULL;
}
static __rte_noinline uint16_t
-virtio_dev_tx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
- struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count)
+virtio_dev_tx_packed_zmbuf(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts,
+ uint32_t count)
{
- uint16_t i;
-
- if (unlikely(dev->dequeue_zero_copy)) {
- struct zcopy_mbuf *zmbuf, *next;
-
- for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
- zmbuf != NULL; zmbuf = next) {
- next = TAILQ_NEXT(zmbuf, next);
+ uint32_t pkt_idx = 0;
+ uint32_t remained = count;
- if (mbuf_is_consumed(zmbuf->mbuf)) {
- update_shadow_used_ring_packed(vq,
- zmbuf->desc_idx,
- 0,
- zmbuf->desc_count);
+ free_zmbuf(vq);
- TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
- restore_mbuf(zmbuf->mbuf);
- rte_pktmbuf_free(zmbuf->mbuf);
- put_zmbuf(zmbuf);
- vq->nr_zmbuf -= 1;
+ do {
+ if (remained >= PACKED_BATCH_SIZE) {
+ if (!virtio_dev_tx_batch_packed_zmbuf(dev, vq,
+ mbuf_pool, &pkts[pkt_idx])) {
+ pkt_idx += PACKED_BATCH_SIZE;
+ remained -= PACKED_BATCH_SIZE;
+ continue;
}
}
- if (likely(vq->shadow_used_idx)) {
- flush_shadow_used_ring_packed(dev, vq);
- vhost_vring_call_packed(dev, vq);
- }
- }
-
- VHOST_LOG_DEBUG(VHOST_DATA, "(%d) %s\n", dev->vid, __func__);
-
- count = RTE_MIN(count, MAX_PKT_BURST);
- VHOST_LOG_DEBUG(VHOST_DATA, "(%d) about to dequeue %u buffers\n",
- dev->vid, count);
-
- for (i = 0; i < count; i++) {
- struct buf_vector buf_vec[BUF_VECTOR_MAX];
- uint16_t buf_id;
- uint32_t buf_len;
- uint16_t desc_count, nr_vec = 0;
- int err;
-
- if (unlikely(fill_vec_buf_packed(dev, vq,
- vq->last_avail_idx, &desc_count,
- buf_vec, &nr_vec,
- &buf_id, &buf_len,
- VHOST_ACCESS_RO) < 0))
+ if (virtio_dev_tx_single_packed_zmbuf(dev, vq, mbuf_pool,
+ &pkts[pkt_idx]))
break;
+ pkt_idx++;
+ remained--;
- if (likely(dev->dequeue_zero_copy == 0))
- update_shadow_used_ring_packed(vq, buf_id, 0,
- desc_count);
+ } while (remained);
- pkts[i] = virtio_dev_pktmbuf_alloc(dev, mbuf_pool, buf_len);
- if (unlikely(pkts[i] == NULL))
- break;
-
- err = copy_desc_to_mbuf(dev, vq, buf_vec, nr_vec, pkts[i],
- mbuf_pool);
- if (unlikely(err)) {
- rte_pktmbuf_free(pkts[i]);
- break;
- }
+ if (pkt_idx)
+ vhost_vring_call_packed(dev, vq);
- if (unlikely(dev->dequeue_zero_copy)) {
- struct zcopy_mbuf *zmbuf;
+ return pkt_idx;
+}
- zmbuf = get_zmbuf(vq);
- if (!zmbuf) {
- rte_pktmbuf_free(pkts[i]);
- break;
- }
- zmbuf->mbuf = pkts[i];
- zmbuf->desc_idx = buf_id;
- zmbuf->desc_count = desc_count;
+static __rte_noinline uint16_t
+virtio_dev_tx_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts,
+ uint32_t count)
+{
+ uint32_t pkt_idx = 0;
+ uint32_t remained = count;
- /*
- * Pin lock the mbuf; we will check later to see
- * whether the mbuf is freed (when we are the last
- * user) or not. If that's the case, we then could
- * update the used ring safely.
- */
- rte_mbuf_refcnt_update(pkts[i], 1);
+ do {
+ rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]);
- vq->nr_zmbuf += 1;
- TAILQ_INSERT_TAIL(&vq->zmbuf_list, zmbuf, next);
+ if (remained >= PACKED_BATCH_SIZE) {
+ if (!virtio_dev_tx_batch_packed(dev, vq, mbuf_pool,
+ &pkts[pkt_idx])) {
+ vhost_flush_dequeue_packed(dev, vq);
+ pkt_idx += PACKED_BATCH_SIZE;
+ remained -= PACKED_BATCH_SIZE;
+ continue;
+ }
}
- vq_inc_last_avail_packed(vq, desc_count);
- }
+ if (virtio_dev_tx_single_packed(dev, vq, mbuf_pool,
+ &pkts[pkt_idx]))
+ break;
+ vhost_flush_dequeue_packed(dev, vq);
+ pkt_idx++;
+ remained--;
- if (likely(dev->dequeue_zero_copy == 0)) {
+ } while (remained);
+
+ if (vq->shadow_used_idx)
do_data_copy_dequeue(vq);
- if (unlikely(i < count))
- vq->shadow_used_idx = i;
- if (likely(vq->shadow_used_idx)) {
- flush_shadow_used_ring_packed(dev, vq);
- vhost_vring_call_packed(dev, vq);
- }
- }
- return i;
+ return pkt_idx;
}
uint16_t
count -= 1;
}
- if (vq_is_packed(dev))
- count = virtio_dev_tx_packed(dev, vq, mbuf_pool, pkts, count);
- else
+ if (vq_is_packed(dev)) {
+ if (unlikely(dev->dequeue_zero_copy))
+ count = virtio_dev_tx_packed_zmbuf(dev, vq, mbuf_pool,
+ pkts, count);
+ else
+ count = virtio_dev_tx_packed(dev, vq, mbuf_pool, pkts,
+ count);
+ } else
count = virtio_dev_tx_split(dev, vq, mbuf_pool, pkts, count);
out:
git.droids-corp.org / dpdk.git / commitdiff