sizeof(vq->used->idx));
}
-static __rte_always_inline void
-async_flush_shadow_used_ring_split(struct virtio_net *dev,
- struct vhost_virtqueue *vq)
-{
- uint16_t used_idx = vq->last_used_idx & (vq->size - 1);
-
- if (used_idx + vq->shadow_used_idx <= vq->size) {
- do_flush_shadow_used_ring_split(dev, vq, used_idx, 0,
- vq->shadow_used_idx);
- } else {
- uint16_t size;
-
- /* update used ring interval [used_idx, vq->size] */
- size = vq->size - used_idx;
- do_flush_shadow_used_ring_split(dev, vq, used_idx, 0, size);
-
- /* update the left half used ring interval [0, left_size] */
- do_flush_shadow_used_ring_split(dev, vq, 0, size,
- vq->shadow_used_idx - size);
- }
-
- vq->last_used_idx += vq->shadow_used_idx;
- vq->shadow_used_idx = 0;
-}
-
static __rte_always_inline void
update_shadow_used_ring_split(struct vhost_virtqueue *vq,
uint16_t desc_idx, uint32_t len)
static __rte_noinline uint32_t
virtio_dev_rx_async_submit_split(struct virtio_net *dev,
struct vhost_virtqueue *vq, uint16_t queue_id,
- struct rte_mbuf **pkts, uint32_t count)
+ struct rte_mbuf **pkts, uint32_t count,
+ struct rte_mbuf **comp_pkts, uint32_t *comp_count)
{
uint32_t pkt_idx = 0, pkt_burst_idx = 0;
uint16_t num_buffers;
struct iovec *dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1);
struct rte_vhost_iov_iter *src_it = it_pool;
struct rte_vhost_iov_iter *dst_it = it_pool + 1;
- uint16_t n_free_slot, slot_idx = 0;
+ uint16_t slot_idx = 0;
uint16_t segs_await = 0;
struct async_inflight_info *pkts_info = vq->async_pkts_info;
uint32_t n_pkts = 0, pkt_err = 0;
+ uint32_t num_async_pkts = 0, num_done_pkts = 0;
+ struct {
+ uint16_t pkt_idx;
+ uint16_t last_avail_idx;
+ } async_pkts_log[MAX_PKT_BURST];
/*
* The ordering between avail index and desc reads need to be enforced.
break;
}
- slot_idx = (vq->async_pkts_idx + pkt_idx) & (vq->size - 1);
+ slot_idx = (vq->async_pkts_idx + num_async_pkts) &
+ (vq->size - 1);
if (src_it->count) {
- async_fill_desc(&tdes[pkt_burst_idx], src_it, dst_it);
- pkt_burst_idx++;
+ uint16_t from, to;
+
+ async_fill_desc(&tdes[pkt_burst_idx++], src_it, dst_it);
pkts_info[slot_idx].descs = num_buffers;
- pkts_info[slot_idx].segs = src_it->nr_segs;
+ pkts_info[slot_idx].mbuf = pkts[pkt_idx];
+ async_pkts_log[num_async_pkts].pkt_idx = pkt_idx;
+ async_pkts_log[num_async_pkts++].last_avail_idx =
+ vq->last_avail_idx;
src_iovec += src_it->nr_segs;
dst_iovec += dst_it->nr_segs;
src_it += 2;
dst_it += 2;
segs_await += src_it->nr_segs;
- } else {
- pkts_info[slot_idx].info = num_buffers;
- vq->async_pkts_inflight_n++;
- }
+
+ /**
+ * recover shadow used ring and keep DMA-occupied
+ * descriptors.
+ */
+ from = vq->shadow_used_idx - num_buffers;
+ to = vq->async_desc_idx & (vq->size - 1);
+ if (num_buffers + to <= vq->size) {
+ rte_memcpy(&vq->async_descs_split[to],
+ &vq->shadow_used_split[from],
+ num_buffers *
+ sizeof(struct vring_used_elem));
+ } else {
+ int size = vq->size - to;
+
+ rte_memcpy(&vq->async_descs_split[to],
+ &vq->shadow_used_split[from],
+ size *
+ sizeof(struct vring_used_elem));
+ rte_memcpy(vq->async_descs_split,
+ &vq->shadow_used_split[from +
+ size], (num_buffers - size) *
+ sizeof(struct vring_used_elem));
+ }
+ vq->async_desc_idx += num_buffers;
+ vq->shadow_used_idx -= num_buffers;
+ } else
+ comp_pkts[num_done_pkts++] = pkts[pkt_idx];
vq->last_avail_idx += num_buffers;
* - buffered packet number reaches transfer threshold
* - unused async iov number is less than max vhost vector
*/
- if (pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD ||
- (VHOST_MAX_ASYNC_VEC / 2 - segs_await <
- BUF_VECTOR_MAX)) {
+ if (unlikely(pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD ||
+ ((VHOST_MAX_ASYNC_VEC >> 1) - segs_await <
+ BUF_VECTOR_MAX))) {
n_pkts = vq->async_ops.transfer_data(dev->vid,
queue_id, tdes, 0, pkt_burst_idx);
src_iovec = vec_pool;
src_it = it_pool;
dst_it = it_pool + 1;
segs_await = 0;
- vq->async_pkts_inflight_n += pkt_burst_idx;
+ vq->async_pkts_inflight_n += n_pkts;
if (unlikely(n_pkts < pkt_burst_idx)) {
/*
if (pkt_burst_idx) {
n_pkts = vq->async_ops.transfer_data(dev->vid,
queue_id, tdes, 0, pkt_burst_idx);
- vq->async_pkts_inflight_n += pkt_burst_idx;
+ vq->async_pkts_inflight_n += n_pkts;
if (unlikely(n_pkts < pkt_burst_idx))
pkt_err = pkt_burst_idx - n_pkts;
do_data_copy_enqueue(dev, vq);
- while (unlikely(pkt_err && pkt_idx)) {
- if (pkts_info[slot_idx].segs)
- pkt_err--;
- vq->last_avail_idx -= pkts_info[slot_idx].descs;
- vq->shadow_used_idx -= pkts_info[slot_idx].descs;
- vq->async_pkts_inflight_n--;
- slot_idx = (slot_idx - 1) & (vq->size - 1);
- pkt_idx--;
- }
-
- n_free_slot = vq->size - vq->async_pkts_idx;
- if (n_free_slot > pkt_idx) {
- rte_memcpy(&vq->async_pkts_pending[vq->async_pkts_idx],
- pkts, pkt_idx * sizeof(uintptr_t));
- vq->async_pkts_idx += pkt_idx;
- } else {
- rte_memcpy(&vq->async_pkts_pending[vq->async_pkts_idx],
- pkts, n_free_slot * sizeof(uintptr_t));
- rte_memcpy(&vq->async_pkts_pending[0],
- &pkts[n_free_slot],
- (pkt_idx - n_free_slot) * sizeof(uintptr_t));
- vq->async_pkts_idx = pkt_idx - n_free_slot;
+ if (unlikely(pkt_err)) {
+ uint16_t num_descs = 0;
+
+ num_async_pkts -= pkt_err;
+ /* calculate the sum of descriptors of DMA-error packets. */
+ while (pkt_err-- > 0) {
+ num_descs += pkts_info[slot_idx & (vq->size - 1)].descs;
+ slot_idx--;
+ }
+ vq->async_desc_idx -= num_descs;
+ /* recover shadow used ring and available ring */
+ vq->shadow_used_idx -= (vq->last_avail_idx -
+ async_pkts_log[num_async_pkts].last_avail_idx -
+ num_descs);
+ vq->last_avail_idx =
+ async_pkts_log[num_async_pkts].last_avail_idx;
+ pkt_idx = async_pkts_log[num_async_pkts].pkt_idx;
+ num_done_pkts = pkt_idx - num_async_pkts;
}
- if (likely(vq->shadow_used_idx))
- async_flush_shadow_used_ring_split(dev, vq);
+ vq->async_pkts_idx += num_async_pkts;
+ *comp_count = num_done_pkts;
+
+ if (likely(vq->shadow_used_idx)) {
+ flush_shadow_used_ring_split(dev, vq);
+ vhost_vring_call_split(dev, vq);
+ }
return pkt_idx;
}
struct vhost_virtqueue *vq;
uint16_t n_pkts_cpl = 0, n_pkts_put = 0, n_descs = 0;
uint16_t start_idx, pkts_idx, vq_size;
- uint16_t n_inflight;
struct async_inflight_info *pkts_info;
+ uint16_t from, i;
if (!dev)
return 0;
rte_spinlock_lock(&vq->access_lock);
- n_inflight = vq->async_pkts_inflight_n;
- pkts_idx = vq->async_pkts_idx;
+ pkts_idx = vq->async_pkts_idx & (vq->size - 1);
pkts_info = vq->async_pkts_info;
vq_size = vq->size;
start_idx = virtio_dev_rx_async_get_info_idx(pkts_idx,
queue_id, 0, count - vq->async_last_pkts_n);
n_pkts_cpl += vq->async_last_pkts_n;
- rte_atomic_thread_fence(__ATOMIC_RELEASE);
-
- while (likely((n_pkts_put < count) && n_inflight)) {
- uint16_t info_idx = (start_idx + n_pkts_put) & (vq_size - 1);
- if (n_pkts_cpl && pkts_info[info_idx].segs)
- n_pkts_cpl--;
- else if (!n_pkts_cpl && pkts_info[info_idx].segs)
- break;
- n_pkts_put++;
- n_inflight--;
- n_descs += pkts_info[info_idx].descs;
- }
-
- vq->async_last_pkts_n = n_pkts_cpl;
+ n_pkts_put = RTE_MIN(count, n_pkts_cpl);
+ if (unlikely(n_pkts_put == 0)) {
+ vq->async_last_pkts_n = n_pkts_cpl;
+ goto done;
+ }
+
+ for (i = 0; i < n_pkts_put; i++) {
+ from = (start_idx + i) & (vq_size - 1);
+ n_descs += pkts_info[from].descs;
+ pkts[i] = pkts_info[from].mbuf;
+ }
+ vq->async_last_pkts_n = n_pkts_cpl - n_pkts_put;
+ vq->async_pkts_inflight_n -= n_pkts_put;
+
+ if (likely(vq->enabled && vq->access_ok)) {
+ uint16_t nr_left = n_descs;
+ uint16_t nr_copy;
+ uint16_t to;
+
+ /* write back completed descriptors to used ring */
+ do {
+ from = vq->last_async_desc_idx & (vq->size - 1);
+ nr_copy = nr_left + from <= vq->size ? nr_left :
+ vq->size - from;
+ to = vq->last_used_idx & (vq->size - 1);
+
+ if (to + nr_copy <= vq->size) {
+ rte_memcpy(&vq->used->ring[to],
+ &vq->async_descs_split[from],
+ nr_copy *
+ sizeof(struct vring_used_elem));
+ } else {
+ uint16_t size = vq->size - to;
+
+ rte_memcpy(&vq->used->ring[to],
+ &vq->async_descs_split[from],
+ size *
+ sizeof(struct vring_used_elem));
+ rte_memcpy(vq->used->ring,
+ &vq->async_descs_split[from +
+ size], (nr_copy - size) *
+ sizeof(struct vring_used_elem));
+ }
- if (n_pkts_put) {
- vq->async_pkts_inflight_n = n_inflight;
- if (likely(vq->enabled && vq->access_ok)) {
- __atomic_add_fetch(&vq->used->idx,
- n_descs, __ATOMIC_RELEASE);
- vhost_vring_call_split(dev, vq);
- }
+ vq->last_async_desc_idx += nr_copy;
+ vq->last_used_idx += nr_copy;
+ nr_left -= nr_copy;
+ } while (nr_left > 0);
- if (start_idx + n_pkts_put <= vq_size) {
- rte_memcpy(pkts, &vq->async_pkts_pending[start_idx],
- n_pkts_put * sizeof(uintptr_t));
- } else {
- rte_memcpy(pkts, &vq->async_pkts_pending[start_idx],
- (vq_size - start_idx) * sizeof(uintptr_t));
- rte_memcpy(&pkts[vq_size - start_idx],
- vq->async_pkts_pending,
- (n_pkts_put + start_idx - vq_size) *
- sizeof(uintptr_t));
- }
- }
+ __atomic_add_fetch(&vq->used->idx, n_descs, __ATOMIC_RELEASE);
+ vhost_vring_call_split(dev, vq);
+ } else
+ vq->last_async_desc_idx += n_descs;
+done:
rte_spinlock_unlock(&vq->access_lock);
return n_pkts_put;
static __rte_always_inline uint32_t
virtio_dev_rx_async_submit(struct virtio_net *dev, uint16_t queue_id,
- struct rte_mbuf **pkts, uint32_t count)
+ struct rte_mbuf **pkts, uint32_t count,
+ struct rte_mbuf **comp_pkts, uint32_t *comp_count)
{
struct vhost_virtqueue *vq;
uint32_t nb_tx = 0;
nb_tx = 0;
else
nb_tx = virtio_dev_rx_async_submit_split(dev,
- vq, queue_id, pkts, count);
+ vq, queue_id, pkts, count, comp_pkts,
+ comp_count);
out:
if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
uint16_t
rte_vhost_submit_enqueue_burst(int vid, uint16_t queue_id,
- struct rte_mbuf **pkts, uint16_t count)
+ struct rte_mbuf **pkts, uint16_t count,
+ struct rte_mbuf **comp_pkts, uint32_t *comp_count)
{
struct virtio_net *dev = get_device(vid);
+ *comp_count = 0;
if (!dev)
return 0;
return 0;
}
- return virtio_dev_rx_async_submit(dev, queue_id, pkts, count);
+ return virtio_dev_rx_async_submit(dev, queue_id, pkts, count, comp_pkts,
+ comp_count);
}
static inline bool
git.droids-corp.org / dpdk.git / commitdiff