return dev->features & (1ULL << VIRTIO_NET_F_MRG_RXBUF);
}
+static __rte_always_inline bool
+virtio_net_is_inorder(struct virtio_net *dev)
+{
+ return dev->features & (1ULL << VIRTIO_F_IN_ORDER);
+}
+
static bool
is_valid_virt_queue_idx(uint32_t idx, int is_tx, uint32_t nr_vring)
{
}
static __rte_always_inline void
-flush_shadow_used_ring_packed(struct virtio_net *dev,
- struct vhost_virtqueue *vq)
+vhost_flush_enqueue_shadow_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq)
{
int i;
uint16_t used_idx = vq->last_used_idx;
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;
}
static __rte_always_inline void
-update_shadow_used_ring_packed(struct vhost_virtqueue *vq,
- uint16_t desc_idx, uint32_t len, uint16_t count)
+vhost_flush_dequeue_shadow_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq)
{
- uint16_t i = vq->shadow_used_idx++;
+ struct vring_used_elem_packed *used_elem = &vq->shadow_used_packed[0];
+
+ vq->desc_packed[vq->shadow_last_used_idx].id = used_elem->id;
+ rte_smp_wmb();
+ vq->desc_packed[vq->shadow_last_used_idx].flags = used_elem->flags;
+
+ vhost_log_cache_used_vring(dev, vq, vq->shadow_last_used_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_flush_enqueue_batch_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ uint64_t *lens,
+ uint16_t *ids)
+{
+ uint16_t i;
+ uint16_t flags;
+
+ flags = PACKED_DESC_ENQUEUE_USED_FLAG(vq->used_wrap_counter);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ vq->desc_packed[vq->last_used_idx + i].id = ids[i];
+ vq->desc_packed[vq->last_used_idx + i].len = lens[i];
+ }
+
+ rte_smp_wmb();
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ vq->desc_packed[vq->last_used_idx + i].flags = flags;
+
+ vhost_log_cache_used_vring(dev, vq, vq->last_used_idx *
+ sizeof(struct vring_packed_desc),
+ sizeof(struct vring_packed_desc) *
+ PACKED_BATCH_SIZE);
+ vhost_log_cache_sync(dev, vq);
+
+ vq_inc_last_used_packed(vq, PACKED_BATCH_SIZE);
+}
+
+static __rte_always_inline void
+vhost_shadow_dequeue_batch_packed_inorder(struct vhost_virtqueue *vq,
+ uint16_t id)
+{
+ vq->shadow_used_packed[0].id = id;
+
+ if (!vq->shadow_used_idx) {
+ vq->shadow_last_used_idx = vq->last_used_idx;
+ vq->shadow_used_packed[0].flags =
+ PACKED_DESC_DEQUEUE_USED_FLAG(vq->used_wrap_counter);
+ vq->shadow_used_packed[0].len = 0;
+ vq->shadow_used_packed[0].count = 1;
+ vq->shadow_used_idx++;
+ }
+
+ vq_inc_last_used_packed(vq, PACKED_BATCH_SIZE);
+}
+
+static __rte_always_inline void
+vhost_shadow_dequeue_batch_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ uint16_t *ids)
+{
+ uint16_t flags;
+ uint16_t i;
+ uint16_t begin;
+
+ flags = PACKED_DESC_DEQUEUE_USED_FLAG(vq->used_wrap_counter);
+
+ if (!vq->shadow_used_idx) {
+ vq->shadow_last_used_idx = vq->last_used_idx;
+ vq->shadow_used_packed[0].id = ids[0];
+ vq->shadow_used_packed[0].len = 0;
+ vq->shadow_used_packed[0].count = 1;
+ vq->shadow_used_packed[0].flags = flags;
+ vq->shadow_used_idx++;
+ begin = 1;
+ } else
+ begin = 0;
+
+ vhost_for_each_try_unroll(i, begin, PACKED_BATCH_SIZE) {
+ vq->desc_packed[vq->last_used_idx + i].id = ids[i];
+ vq->desc_packed[vq->last_used_idx + i].len = 0;
+ }
+
+ rte_smp_wmb();
+ vhost_for_each_try_unroll(i, begin, PACKED_BATCH_SIZE)
+ vq->desc_packed[vq->last_used_idx + i].flags = flags;
+
+ vhost_log_cache_used_vring(dev, vq, vq->last_used_idx *
+ sizeof(struct vring_packed_desc),
+ sizeof(struct vring_packed_desc) *
+ PACKED_BATCH_SIZE);
+ vhost_log_cache_sync(dev, vq);
+
+ vq_inc_last_used_packed(vq, PACKED_BATCH_SIZE);
+}
+
+static __rte_always_inline void
+vhost_shadow_dequeue_single_packed(struct vhost_virtqueue *vq,
+ uint16_t buf_id,
+ uint16_t count)
+{
+ uint16_t flags;
+
+ flags = vq->desc_packed[vq->last_used_idx].flags;
+ 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 (!vq->shadow_used_idx) {
+ vq->shadow_last_used_idx = vq->last_used_idx;
+
+ vq->shadow_used_packed[0].id = buf_id;
+ vq->shadow_used_packed[0].len = 0;
+ vq->shadow_used_packed[0].flags = flags;
+ vq->shadow_used_idx++;
+ } else {
+ vq->desc_packed[vq->last_used_idx].id = buf_id;
+ vq->desc_packed[vq->last_used_idx].len = 0;
+ vq->desc_packed[vq->last_used_idx].flags = flags;
+ }
+
+ vq_inc_last_used_packed(vq, count);
+}
+
+static __rte_always_inline void
+vhost_shadow_dequeue_single_packed_inorder(struct vhost_virtqueue *vq,
+ uint16_t buf_id,
+ uint16_t count)
+{
+ uint16_t flags;
+
+ vq->shadow_used_packed[0].id = buf_id;
+
+ flags = vq->desc_packed[vq->last_used_idx].flags;
+ 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 (!vq->shadow_used_idx) {
+ vq->shadow_last_used_idx = vq->last_used_idx;
+ vq->shadow_used_packed[0].len = 0;
+ vq->shadow_used_packed[0].flags = flags;
+ 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;
+ vq_inc_last_used_packed(vq, count);
}
static inline void
for (i = 0; i < count; i++) {
rte_memcpy(elem[i].dst, elem[i].src, elem[i].len);
- vhost_log_cache_write(dev, vq, elem[i].log_addr, elem[i].len);
+ vhost_log_cache_write_iova(dev, vq, elem[i].log_addr,
+ elem[i].len);
PRINT_PACKET(dev, (uintptr_t)elem[i].dst, elem[i].len, 0);
}
vq->batch_copy_nb_elems = 0;
}
+static __rte_always_inline void
+vhost_shadow_enqueue_single_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ uint32_t len[],
+ uint16_t id[],
+ uint16_t count[],
+ uint16_t num_buffers)
+{
+ uint16_t i;
+ for (i = 0; i < num_buffers; i++) {
+ /* enqueue shadow flush action aligned with batch num */
+ if (!vq->shadow_used_idx)
+ vq->shadow_aligned_idx = vq->last_used_idx &
+ PACKED_BATCH_MASK;
+ vq->shadow_used_packed[vq->shadow_used_idx].id = id[i];
+ vq->shadow_used_packed[vq->shadow_used_idx].len = len[i];
+ vq->shadow_used_packed[vq->shadow_used_idx].count = count[i];
+ vq->shadow_aligned_idx += count[i];
+ vq->shadow_used_idx++;
+ }
+
+ if (vq->shadow_aligned_idx >= PACKED_BATCH_SIZE) {
+ do_data_copy_enqueue(dev, vq);
+ vhost_flush_enqueue_shadow_packed(dev, vq);
+ }
+}
+
+static __rte_always_inline void
+vhost_flush_dequeue_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq)
+{
+ int shadow_count;
+ if (!vq->shadow_used_idx)
+ return;
+
+ shadow_count = vq->last_used_idx - vq->shadow_last_used_idx;
+ if (shadow_count <= 0)
+ shadow_count += vq->size;
+
+ if ((uint32_t)shadow_count >= (vq->size - MAX_PKT_BURST)) {
+ do_data_copy_dequeue(vq);
+ vhost_flush_dequeue_shadow_packed(dev, vq);
+ vhost_vring_call_packed(dev, vq);
+ }
+}
+
/* avoid write operation when necessary, to lessen cache issues */
#define ASSIGN_UNLESS_EQUAL(var, val) do { \
if ((var) != (val)) \
ipv4_hdr = rte_pktmbuf_mtod_offset(m_buf, struct rte_ipv4_hdr *,
m_buf->l2_len);
+ ipv4_hdr->hdr_checksum = 0;
ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
}
return 0;
}
-/*
- * Returns -1 on fail, 0 on success
- */
-static inline int
-reserve_avail_buf_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
- uint32_t size, struct buf_vector *buf_vec,
- uint16_t *nr_vec, uint16_t *num_buffers,
- uint16_t *nr_descs)
-{
- uint16_t avail_idx;
- uint16_t vec_idx = 0;
- uint16_t max_tries, tries = 0;
-
- uint16_t buf_id = 0;
- uint32_t len = 0;
- uint16_t desc_count;
-
- *num_buffers = 0;
- avail_idx = vq->last_avail_idx;
-
- if (rxvq_is_mergeable(dev))
- max_tries = vq->size - 1;
- else
- max_tries = 1;
-
- while (size > 0) {
- /*
- * if we tried all available ring items, and still
- * can't get enough buf, it means something abnormal
- * happened.
- */
- if (unlikely(++tries > max_tries))
- return -1;
-
- if (unlikely(fill_vec_buf_packed(dev, vq,
- avail_idx, &desc_count,
- buf_vec, &vec_idx,
- &buf_id, &len,
- VHOST_ACCESS_RW) < 0))
- return -1;
-
- len = RTE_MIN(len, size);
- update_shadow_used_ring_packed(vq, buf_id, len, desc_count);
- size -= len;
-
- avail_idx += desc_count;
- if (avail_idx >= vq->size)
- avail_idx -= vq->size;
-
- *nr_descs += desc_count;
- *num_buffers += 1;
- }
-
- *nr_vec = vec_idx;
-
- return 0;
-}
-
static __rte_noinline void
copy_vnet_hdr_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
struct buf_vector *buf_vec,
PRINT_PACKET(dev, (uintptr_t)dst,
(uint32_t)len, 0);
- vhost_log_cache_write(dev, vq,
+ vhost_log_cache_write_iova(dev, vq,
iova, len);
remain -= len;
} else {
PRINT_PACKET(dev, (uintptr_t)hdr_addr,
dev->vhost_hlen, 0);
- vhost_log_cache_write(dev, vq,
+ vhost_log_cache_write_iova(dev, vq,
buf_vec[0].buf_iova,
dev->vhost_hlen);
}
rte_memcpy((void *)((uintptr_t)(buf_addr + buf_offset)),
rte_pktmbuf_mtod_offset(m, void *, mbuf_offset),
cpy_len);
- vhost_log_cache_write(dev, vq, buf_iova + buf_offset,
- cpy_len);
+ vhost_log_cache_write_iova(dev, vq,
+ buf_iova + buf_offset,
+ cpy_len);
PRINT_PACKET(dev, (uintptr_t)(buf_addr + buf_offset),
cpy_len, 0);
} else {
return error;
}
+static __rte_always_inline int
+vhost_enqueue_single_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mbuf *pkt,
+ struct buf_vector *buf_vec,
+ uint16_t *nr_descs)
+{
+ uint16_t nr_vec = 0;
+ uint16_t avail_idx = vq->last_avail_idx;
+ uint16_t max_tries, tries = 0;
+ uint16_t buf_id = 0;
+ uint32_t len = 0;
+ uint16_t desc_count;
+ uint32_t size = pkt->pkt_len + dev->vhost_hlen;
+ uint16_t num_buffers = 0;
+ uint32_t buffer_len[vq->size];
+ uint16_t buffer_buf_id[vq->size];
+ uint16_t buffer_desc_count[vq->size];
+
+ if (rxvq_is_mergeable(dev))
+ max_tries = vq->size - 1;
+ else
+ max_tries = 1;
+
+ while (size > 0) {
+ /*
+ * if we tried all available ring items, and still
+ * can't get enough buf, it means something abnormal
+ * happened.
+ */
+ if (unlikely(++tries > max_tries))
+ return -1;
+
+ if (unlikely(fill_vec_buf_packed(dev, vq,
+ avail_idx, &desc_count,
+ buf_vec, &nr_vec,
+ &buf_id, &len,
+ VHOST_ACCESS_RW) < 0))
+ return -1;
+
+ len = RTE_MIN(len, size);
+ size -= len;
+
+ buffer_len[num_buffers] = len;
+ buffer_buf_id[num_buffers] = buf_id;
+ buffer_desc_count[num_buffers] = desc_count;
+ num_buffers += 1;
+
+ *nr_descs += desc_count;
+ avail_idx += desc_count;
+ if (avail_idx >= vq->size)
+ avail_idx -= vq->size;
+ }
+
+ if (copy_mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, num_buffers) < 0)
+ return -1;
+
+ vhost_shadow_enqueue_single_packed(dev, vq, buffer_len, buffer_buf_id,
+ buffer_desc_count, num_buffers);
+
+ return 0;
+}
+
static __rte_noinline uint32_t
virtio_dev_rx_split(struct virtio_net *dev, struct vhost_virtqueue *vq,
struct rte_mbuf **pkts, uint32_t count)
return pkt_idx;
}
-static __rte_noinline uint32_t
-virtio_dev_rx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
- struct rte_mbuf **pkts, uint32_t count)
+static __rte_always_inline int
+virtio_dev_rx_batch_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mbuf **pkts)
{
- uint32_t pkt_idx = 0;
- uint16_t num_buffers;
- struct buf_vector buf_vec[BUF_VECTOR_MAX];
+ bool wrap_counter = vq->avail_wrap_counter;
+ struct vring_packed_desc *descs = vq->desc_packed;
+ uint16_t avail_idx = vq->last_avail_idx;
+ uint64_t desc_addrs[PACKED_BATCH_SIZE];
+ struct virtio_net_hdr_mrg_rxbuf *hdrs[PACKED_BATCH_SIZE];
+ uint32_t buf_offset = dev->vhost_hlen;
+ uint64_t lens[PACKED_BATCH_SIZE];
+ uint16_t ids[PACKED_BATCH_SIZE];
+ uint16_t i;
- for (pkt_idx = 0; pkt_idx < count; pkt_idx++) {
- uint32_t pkt_len = pkts[pkt_idx]->pkt_len + dev->vhost_hlen;
- uint16_t nr_vec = 0;
- uint16_t nr_descs = 0;
+ if (unlikely(avail_idx & PACKED_BATCH_MASK))
+ return -1;
- if (unlikely(reserve_avail_buf_packed(dev, vq,
- pkt_len, buf_vec, &nr_vec,
- &num_buffers, &nr_descs) < 0)) {
- VHOST_LOG_DEBUG(VHOST_DATA,
+ if (unlikely((avail_idx + PACKED_BATCH_SIZE) > vq->size))
+ return -1;
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ if (unlikely(pkts[i]->next != NULL))
+ return -1;
+ if (unlikely(!desc_is_avail(&descs[avail_idx + i],
+ wrap_counter)))
+ return -1;
+ }
+
+ rte_smp_rmb();
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ lens[i] = descs[avail_idx + i].len;
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ if (unlikely(pkts[i]->pkt_len > (lens[i] - buf_offset)))
+ return -1;
+ }
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ desc_addrs[i] = vhost_iova_to_vva(dev, vq,
+ descs[avail_idx + i].addr,
+ &lens[i],
+ VHOST_ACCESS_RW);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ if (unlikely(lens[i] != descs[avail_idx + i].len))
+ return -1;
+ }
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ rte_prefetch0((void *)(uintptr_t)desc_addrs[i]);
+ hdrs[i] = (struct virtio_net_hdr_mrg_rxbuf *)
+ (uintptr_t)desc_addrs[i];
+ lens[i] = pkts[i]->pkt_len + dev->vhost_hlen;
+ }
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ virtio_enqueue_offload(pkts[i], &hdrs[i]->hdr);
+
+ vq_inc_last_avail_packed(vq, PACKED_BATCH_SIZE);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ rte_memcpy((void *)(uintptr_t)(desc_addrs[i] + buf_offset),
+ rte_pktmbuf_mtod_offset(pkts[i], void *, 0),
+ pkts[i]->pkt_len);
+ }
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ vhost_log_cache_write_iova(dev, vq, descs[avail_idx + i].addr,
+ lens[i]);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ ids[i] = descs[avail_idx + i].id;
+
+ vhost_flush_enqueue_batch_packed(dev, vq, lens, ids);
+
+ return 0;
+}
+
+static __rte_always_inline int16_t
+virtio_dev_rx_single_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mbuf *pkt)
+{
+ struct buf_vector buf_vec[BUF_VECTOR_MAX];
+ uint16_t nr_descs = 0;
+
+ rte_smp_rmb();
+ if (unlikely(vhost_enqueue_single_packed(dev, vq, pkt, buf_vec,
+ &nr_descs) < 0)) {
+ VHOST_LOG_DEBUG(VHOST_DATA,
"(%d) failed to get enough desc from vring\n",
dev->vid);
- vq->shadow_used_idx -= num_buffers;
- break;
- }
+ return -1;
+ }
- VHOST_LOG_DEBUG(VHOST_DATA, "(%d) current index %d | end index %d\n",
+ VHOST_LOG_DEBUG(VHOST_DATA, "(%d) current index %d | end index %d\n",
dev->vid, vq->last_avail_idx,
- vq->last_avail_idx + num_buffers);
+ vq->last_avail_idx + nr_descs);
- if (copy_mbuf_to_desc(dev, vq, pkts[pkt_idx],
- buf_vec, nr_vec,
- num_buffers) < 0) {
- vq->shadow_used_idx -= num_buffers;
- break;
- }
+ vq_inc_last_avail_packed(vq, nr_descs);
+
+ return 0;
+}
- vq->last_avail_idx += nr_descs;
- if (vq->last_avail_idx >= vq->size) {
- vq->last_avail_idx -= vq->size;
- vq->avail_wrap_counter ^= 1;
+static __rte_noinline uint32_t
+virtio_dev_rx_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mbuf **pkts,
+ uint32_t count)
+{
+ uint32_t pkt_idx = 0;
+ uint32_t remained = count;
+
+ do {
+ rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]);
+
+ if (remained >= PACKED_BATCH_SIZE) {
+ if (!virtio_dev_rx_batch_packed(dev, vq,
+ &pkts[pkt_idx])) {
+ pkt_idx += PACKED_BATCH_SIZE;
+ remained -= PACKED_BATCH_SIZE;
+ continue;
+ }
}
- }
- do_data_copy_enqueue(dev, vq);
+ if (virtio_dev_rx_single_packed(dev, vq, pkts[pkt_idx]))
+ break;
+ pkt_idx++;
+ remained--;
- if (likely(vq->shadow_used_idx)) {
- flush_shadow_used_ring_packed(dev, vq);
- vhost_vring_call_packed(dev, vq);
+ } while (pkt_idx < count);
+
+ if (vq->shadow_used_idx) {
+ do_data_copy_enqueue(dev, vq);
+ vhost_flush_enqueue_shadow_packed(dev, vq);
}
+ if (pkt_idx)
+ vhost_vring_call_packed(dev, vq);
+
return pkt_idx;
}
return NULL;
}
+static void
+virtio_dev_extbuf_free(void *addr __rte_unused, void *opaque)
+{
+ rte_free(opaque);
+}
+
+static int
+virtio_dev_extbuf_alloc(struct rte_mbuf *pkt, uint32_t size)
+{
+ struct rte_mbuf_ext_shared_info *shinfo = NULL;
+ uint32_t total_len = RTE_PKTMBUF_HEADROOM + size;
+ uint16_t buf_len;
+ rte_iova_t iova;
+ void *buf;
+
+ /* Try to use pkt buffer to store shinfo to reduce the amount of memory
+ * required, otherwise store shinfo in the new buffer.
+ */
+ if (rte_pktmbuf_tailroom(pkt) >= sizeof(*shinfo))
+ shinfo = rte_pktmbuf_mtod(pkt,
+ struct rte_mbuf_ext_shared_info *);
+ else {
+ total_len += sizeof(*shinfo) + sizeof(uintptr_t);
+ total_len = RTE_ALIGN_CEIL(total_len, sizeof(uintptr_t));
+ }
+
+ if (unlikely(total_len > UINT16_MAX))
+ return -ENOSPC;
+
+ buf_len = total_len;
+ buf = rte_malloc(NULL, buf_len, RTE_CACHE_LINE_SIZE);
+ if (unlikely(buf == NULL))
+ return -ENOMEM;
+
+ /* Initialize shinfo */
+ if (shinfo) {
+ shinfo->free_cb = virtio_dev_extbuf_free;
+ shinfo->fcb_opaque = buf;
+ rte_mbuf_ext_refcnt_set(shinfo, 1);
+ } else {
+ shinfo = rte_pktmbuf_ext_shinfo_init_helper(buf, &buf_len,
+ virtio_dev_extbuf_free, buf);
+ if (unlikely(shinfo == NULL)) {
+ rte_free(buf);
+ RTE_LOG(ERR, VHOST_DATA, "Failed to init shinfo\n");
+ return -1;
+ }
+ }
+
+ iova = rte_malloc_virt2iova(buf);
+ rte_pktmbuf_attach_extbuf(pkt, buf, iova, buf_len, shinfo);
+ rte_pktmbuf_reset_headroom(pkt);
+
+ return 0;
+}
+
+/*
+ * Allocate a host supported pktmbuf.
+ */
+static __rte_always_inline struct rte_mbuf *
+virtio_dev_pktmbuf_alloc(struct virtio_net *dev, struct rte_mempool *mp,
+ uint32_t data_len)
+{
+ struct rte_mbuf *pkt = rte_pktmbuf_alloc(mp);
+
+ if (unlikely(pkt == NULL)) {
+ RTE_LOG(ERR, VHOST_DATA,
+ "Failed to allocate memory for mbuf.\n");
+ return NULL;
+ }
+
+ if (rte_pktmbuf_tailroom(pkt) >= data_len)
+ return pkt;
+
+ /* attach an external buffer if supported */
+ if (dev->extbuf && !virtio_dev_extbuf_alloc(pkt, data_len))
+ return pkt;
+
+ /* check if chained buffers are allowed */
+ if (!dev->linearbuf)
+ return pkt;
+
+ /* Data doesn't fit into the buffer and the host supports
+ * only linear buffers
+ */
+ rte_pktmbuf_free(pkt);
+
+ return NULL;
+}
+
static __rte_noinline uint16_t
virtio_dev_tx_split(struct virtio_net *dev, struct vhost_virtqueue *vq,
struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count)
for (i = 0; i < count; i++) {
struct buf_vector buf_vec[BUF_VECTOR_MAX];
uint16_t head_idx;
- uint32_t dummy_len;
+ uint32_t buf_len;
uint16_t nr_vec = 0;
int err;
if (unlikely(fill_vec_buf_split(dev, vq,
vq->last_avail_idx + i,
&nr_vec, buf_vec,
- &head_idx, &dummy_len,
+ &head_idx, &buf_len,
VHOST_ACCESS_RO) < 0))
break;
if (likely(dev->dequeue_zero_copy == 0))
update_shadow_used_ring_split(vq, head_idx, 0);
- pkts[i] = rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(pkts[i] == NULL)) {
- RTE_LOG(ERR, VHOST_DATA,
- "Failed to allocate memory for mbuf.\n");
+ 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);
return i;
}
-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)
+static __rte_always_inline int
+vhost_reserve_avail_batch_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts,
+ uint16_t avail_idx,
+ uintptr_t *desc_addrs,
+ uint16_t *ids)
{
- uint16_t i;
+ bool wrap = vq->avail_wrap_counter;
+ struct vring_packed_desc *descs = vq->desc_packed;
+ struct virtio_net_hdr *hdr;
+ uint64_t lens[PACKED_BATCH_SIZE];
+ uint64_t buf_lens[PACKED_BATCH_SIZE];
+ uint32_t buf_offset = dev->vhost_hlen;
+ uint16_t flags, i;
- if (unlikely(dev->dequeue_zero_copy)) {
- struct zcopy_mbuf *zmbuf, *next;
+ if (unlikely(avail_idx & PACKED_BATCH_MASK))
+ return -1;
+ if (unlikely((avail_idx + PACKED_BATCH_SIZE) > vq->size))
+ return -1;
- for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
- zmbuf != NULL; zmbuf = next) {
- next = TAILQ_NEXT(zmbuf, next);
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ flags = descs[avail_idx + i].flags;
+ if (unlikely((wrap != !!(flags & VRING_DESC_F_AVAIL)) ||
+ (wrap == !!(flags & VRING_DESC_F_USED)) ||
+ (flags & PACKED_DESC_SINGLE_DEQUEUE_FLAG)))
+ return -1;
+ }
- if (mbuf_is_consumed(zmbuf->mbuf)) {
- update_shadow_used_ring_packed(vq,
- zmbuf->desc_idx,
- 0,
- zmbuf->desc_count);
+ rte_smp_rmb();
- TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
- restore_mbuf(zmbuf->mbuf);
- rte_pktmbuf_free(zmbuf->mbuf);
- put_zmbuf(zmbuf);
- vq->nr_zmbuf -= 1;
- }
- }
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ lens[i] = descs[avail_idx + i].len;
- if (likely(vq->shadow_used_idx)) {
- flush_shadow_used_ring_packed(dev, vq);
- vhost_vring_call_packed(dev, vq);
- }
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ desc_addrs[i] = vhost_iova_to_vva(dev, vq,
+ descs[avail_idx + i].addr,
+ &lens[i], VHOST_ACCESS_RW);
}
- VHOST_LOG_DEBUG(VHOST_DATA, "(%d) %s\n", dev->vid, __func__);
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ if (unlikely((lens[i] != descs[avail_idx + i].len)))
+ return -1;
+ }
- count = RTE_MIN(count, MAX_PKT_BURST);
- VHOST_LOG_DEBUG(VHOST_DATA, "(%d) about to dequeue %u buffers\n",
- dev->vid, count);
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ pkts[i] = virtio_dev_pktmbuf_alloc(dev, mbuf_pool, lens[i]);
+ if (!pkts[i])
+ goto free_buf;
+ }
- for (i = 0; i < count; i++) {
- struct buf_vector buf_vec[BUF_VECTOR_MAX];
- uint16_t buf_id;
- uint32_t dummy_len;
- uint16_t desc_count, nr_vec = 0;
- int err;
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ buf_lens[i] = pkts[i]->buf_len - pkts[i]->data_off;
- if (unlikely(fill_vec_buf_packed(dev, vq,
- vq->last_avail_idx, &desc_count,
- buf_vec, &nr_vec,
- &buf_id, &dummy_len,
- VHOST_ACCESS_RO) < 0))
- break;
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ if (unlikely(buf_lens[i] < (lens[i] - buf_offset)))
+ goto free_buf;
+ }
- if (likely(dev->dequeue_zero_copy == 0))
- update_shadow_used_ring_packed(vq, buf_id, 0,
- desc_count);
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ pkts[i]->pkt_len = descs[avail_idx + i].len - buf_offset;
+ pkts[i]->data_len = pkts[i]->pkt_len;
+ ids[i] = descs[avail_idx + i].id;
+ }
- pkts[i] = rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(pkts[i] == NULL)) {
- RTE_LOG(ERR, VHOST_DATA,
- "Failed to allocate memory for mbuf.\n");
- break;
+ if (virtio_net_with_host_offload(dev)) {
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ hdr = (struct virtio_net_hdr *)(desc_addrs[i]);
+ vhost_dequeue_offload(hdr, pkts[i]);
}
+ }
- err = copy_desc_to_mbuf(dev, vq, buf_vec, nr_vec, pkts[i],
+ return 0;
+
+free_buf:
+ for (i = 0; i < PACKED_BATCH_SIZE; i++)
+ rte_pktmbuf_free(pkts[i]);
+
+ return -1;
+}
+
+static __rte_always_inline int
+virtio_dev_tx_batch_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts)
+{
+ uint16_t avail_idx = vq->last_avail_idx;
+ uint32_t buf_offset = dev->vhost_hlen;
+ uintptr_t desc_addrs[PACKED_BATCH_SIZE];
+ uint16_t ids[PACKED_BATCH_SIZE];
+ uint16_t i;
+
+ if (vhost_reserve_avail_batch_packed(dev, vq, mbuf_pool, pkts,
+ avail_idx, desc_addrs, ids))
+ return -1;
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ rte_prefetch0((void *)(uintptr_t)desc_addrs[i]);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ rte_memcpy(rte_pktmbuf_mtod_offset(pkts[i], void *, 0),
+ (void *)(uintptr_t)(desc_addrs[i] + buf_offset),
+ pkts[i]->pkt_len);
+
+ if (virtio_net_is_inorder(dev))
+ vhost_shadow_dequeue_batch_packed_inorder(vq,
+ ids[PACKED_BATCH_SIZE - 1]);
+ else
+ vhost_shadow_dequeue_batch_packed(dev, vq, ids);
+
+ vq_inc_last_avail_packed(vq, PACKED_BATCH_SIZE);
+
+ return 0;
+}
+
+static __rte_always_inline int
+vhost_dequeue_single_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts,
+ uint16_t *buf_id,
+ uint16_t *desc_count)
+{
+ struct buf_vector buf_vec[BUF_VECTOR_MAX];
+ uint32_t buf_len;
+ uint16_t 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))
+ return -1;
+
+ *pkts = virtio_dev_pktmbuf_alloc(dev, mbuf_pool, buf_len);
+ if (unlikely(*pkts == NULL)) {
+ RTE_LOG(ERR, VHOST_DATA,
+ "Failed to allocate memory for mbuf.\n");
+ return -1;
+ }
+
+ err = copy_desc_to_mbuf(dev, vq, buf_vec, nr_vec, *pkts,
mbuf_pool);
- if (unlikely(err)) {
- rte_pktmbuf_free(pkts[i]);
- break;
- }
+ if (unlikely(err)) {
+ rte_pktmbuf_free(*pkts);
+ return -1;
+ }
- if (unlikely(dev->dequeue_zero_copy)) {
- struct zcopy_mbuf *zmbuf;
+ return 0;
+}
- zmbuf = get_zmbuf(vq);
- if (!zmbuf) {
- rte_pktmbuf_free(pkts[i]);
- break;
+static __rte_always_inline int
+virtio_dev_tx_single_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts)
+{
+
+ uint16_t buf_id, desc_count;
+
+ if (vhost_dequeue_single_packed(dev, vq, mbuf_pool, pkts, &buf_id,
+ &desc_count))
+ return -1;
+
+ if (virtio_net_is_inorder(dev))
+ vhost_shadow_dequeue_single_packed_inorder(vq, buf_id,
+ desc_count);
+ else
+ vhost_shadow_dequeue_single_packed(vq, buf_id, desc_count);
+
+ vq_inc_last_avail_packed(vq, desc_count);
+
+ return 0;
+}
+
+static __rte_always_inline int
+virtio_dev_tx_batch_packed_zmbuf(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts)
+{
+ struct zcopy_mbuf *zmbufs[PACKED_BATCH_SIZE];
+ uintptr_t desc_addrs[PACKED_BATCH_SIZE];
+ uint16_t ids[PACKED_BATCH_SIZE];
+ uint16_t i;
+
+ uint16_t avail_idx = vq->last_avail_idx;
+
+ if (vhost_reserve_avail_batch_packed(dev, vq, mbuf_pool, pkts,
+ avail_idx, desc_addrs, ids))
+ return -1;
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ zmbufs[i] = get_zmbuf(vq);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ if (!zmbufs[i])
+ goto free_pkt;
+ }
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
+ zmbufs[i]->mbuf = pkts[i];
+ zmbufs[i]->desc_idx = avail_idx + i;
+ zmbufs[i]->desc_count = 1;
+ }
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ rte_mbuf_refcnt_update(pkts[i], 1);
+
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ TAILQ_INSERT_TAIL(&vq->zmbuf_list, zmbufs[i], next);
+
+ vq->nr_zmbuf += PACKED_BATCH_SIZE;
+ vq_inc_last_avail_packed(vq, PACKED_BATCH_SIZE);
+
+ return 0;
+
+free_pkt:
+ vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE)
+ rte_pktmbuf_free(pkts[i]);
+
+ return -1;
+}
+
+static __rte_always_inline int
+virtio_dev_tx_single_packed_zmbuf(struct virtio_net *dev,
+ struct vhost_virtqueue *vq,
+ struct rte_mempool *mbuf_pool,
+ struct rte_mbuf **pkts)
+{
+ uint16_t buf_id, desc_count;
+ struct zcopy_mbuf *zmbuf;
+
+ if (vhost_dequeue_single_packed(dev, vq, mbuf_pool, pkts, &buf_id,
+ &desc_count))
+ return -1;
+
+ zmbuf = get_zmbuf(vq);
+ if (!zmbuf) {
+ rte_pktmbuf_free(*pkts);
+ return -1;
+ }
+ zmbuf->mbuf = *pkts;
+ zmbuf->desc_idx = vq->last_avail_idx;
+ zmbuf->desc_count = desc_count;
+
+ rte_mbuf_refcnt_update(*pkts, 1);
+
+ vq->nr_zmbuf += 1;
+ TAILQ_INSERT_TAIL(&vq->zmbuf_list, zmbuf, next);
+
+ vq_inc_last_avail_packed(vq, desc_count);
+ return 0;
+}
+
+static __rte_always_inline void
+free_zmbuf(struct vhost_virtqueue *vq)
+{
+ struct zcopy_mbuf *next = NULL;
+ struct zcopy_mbuf *zmbuf;
+
+ for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
+ zmbuf != NULL; zmbuf = next) {
+ next = TAILQ_NEXT(zmbuf, next);
+
+ uint16_t last_used_idx = vq->last_used_idx;
+
+ if (mbuf_is_consumed(zmbuf->mbuf)) {
+ uint16_t flags;
+ flags = vq->desc_packed[last_used_idx].flags;
+ 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;
}
- zmbuf->mbuf = pkts[i];
- zmbuf->desc_idx = buf_id;
- zmbuf->desc_count = desc_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);
+ vq->desc_packed[last_used_idx].id = zmbuf->desc_idx;
+ vq->desc_packed[last_used_idx].len = 0;
- vq->nr_zmbuf += 1;
- TAILQ_INSERT_TAIL(&vq->zmbuf_list, zmbuf, next);
- }
+ rte_smp_wmb();
+ vq->desc_packed[last_used_idx].flags = flags;
- 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_used_packed(vq, zmbuf->desc_count);
+
+ TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
+ restore_mbuf(zmbuf->mbuf);
+ rte_pktmbuf_free(zmbuf->mbuf);
+ put_zmbuf(zmbuf);
+ vq->nr_zmbuf -= 1;
}
}
+}
- if (likely(dev->dequeue_zero_copy == 0)) {
- 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);
+static __rte_noinline uint16_t
+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)
+{
+ uint32_t pkt_idx = 0;
+ uint32_t remained = count;
+
+ free_zmbuf(vq);
+
+ 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;
+ }
}
- }
- return i;
+ if (virtio_dev_tx_single_packed_zmbuf(dev, vq, mbuf_pool,
+ &pkts[pkt_idx]))
+ break;
+ pkt_idx++;
+ remained--;
+
+ } while (remained);
+
+ if (pkt_idx)
+ vhost_vring_call_packed(dev, vq);
+
+ return pkt_idx;
+}
+
+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;
+
+ do {
+ rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]);
+
+ 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;
+ }
+ }
+
+ if (virtio_dev_tx_single_packed(dev, vq, mbuf_pool,
+ &pkts[pkt_idx]))
+ break;
+ vhost_flush_dequeue_packed(dev, vq);
+ pkt_idx++;
+ remained--;
+
+ } while (remained);
+
+ if (vq->shadow_used_idx)
+ do_data_copy_dequeue(vq);
+
+ 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 / blobdiff