#include "virtqueue.h"
#include "virtio_rxtx.h"
#include "virtio_rxtx_simple.h"
+#include "virtio_ring.h"
#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
#define VIRTIO_DUMP_PACKET(m, len) rte_pktmbuf_dump(stdout, m, len)
dp->next = VQ_RING_DESC_CHAIN_END;
}
+static void
+vq_ring_free_id_packed(struct virtqueue *vq, uint16_t id)
+{
+ struct vq_desc_extra *dxp;
+
+ dxp = &vq->vq_descx[id];
+ vq->vq_free_cnt += dxp->ndescs;
+
+ if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END)
+ vq->vq_desc_head_idx = id;
+ else
+ vq->vq_descx[vq->vq_desc_tail_idx].next = id;
+
+ vq->vq_desc_tail_idx = id;
+ dxp->next = VQ_RING_DESC_CHAIN_END;
+}
+
+static uint16_t
+virtqueue_dequeue_burst_rx_packed(struct virtqueue *vq,
+ struct rte_mbuf **rx_pkts,
+ uint32_t *len,
+ uint16_t num)
+{
+ struct rte_mbuf *cookie;
+ uint16_t used_idx;
+ uint16_t id;
+ struct vring_packed_desc *desc;
+ uint16_t i;
+
+ desc = vq->ring_packed.desc_packed;
+
+ for (i = 0; i < num; i++) {
+ used_idx = vq->vq_used_cons_idx;
+ if (!desc_is_used(&desc[used_idx], vq))
+ return i;
+ len[i] = desc[used_idx].len;
+ id = desc[used_idx].id;
+ cookie = (struct rte_mbuf *)vq->vq_descx[id].cookie;
+ if (unlikely(cookie == NULL)) {
+ PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
+ vq->vq_used_cons_idx);
+ break;
+ }
+ rte_prefetch0(cookie);
+ rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
+ rx_pkts[i] = cookie;
+
+ vq->vq_free_cnt++;
+ vq->vq_used_cons_idx++;
+ if (vq->vq_used_cons_idx >= vq->vq_nentries) {
+ vq->vq_used_cons_idx -= vq->vq_nentries;
+ vq->used_wrap_counter ^= 1;
+ }
+ }
+
+ return i;
+}
+
static uint16_t
virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts,
uint32_t *len, uint16_t num)
#endif
/* Cleanup from completed transmits. */
+static void
+virtio_xmit_cleanup_packed(struct virtqueue *vq, int num)
+{
+ uint16_t used_idx, id;
+ uint16_t size = vq->vq_nentries;
+ struct vring_packed_desc *desc = vq->ring_packed.desc_packed;
+ struct vq_desc_extra *dxp;
+
+ used_idx = vq->vq_used_cons_idx;
+ while (num-- && desc_is_used(&desc[used_idx], vq)) {
+ used_idx = vq->vq_used_cons_idx;
+ id = desc[used_idx].id;
+ dxp = &vq->vq_descx[id];
+ vq->vq_used_cons_idx += dxp->ndescs;
+ if (vq->vq_used_cons_idx >= size) {
+ vq->vq_used_cons_idx -= size;
+ vq->used_wrap_counter ^= 1;
+ }
+ vq_ring_free_id_packed(vq, id);
+ if (dxp->cookie != NULL) {
+ rte_pktmbuf_free(dxp->cookie);
+ dxp->cookie = NULL;
+ }
+ used_idx = vq->vq_used_cons_idx;
+ }
+}
+
static void
virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
{
return 0;
}
+static inline int
+virtqueue_enqueue_recv_refill_packed(struct virtqueue *vq,
+ struct rte_mbuf **cookie, uint16_t num)
+{
+ struct vring_packed_desc *start_dp = vq->ring_packed.desc_packed;
+ uint16_t flags = VRING_DESC_F_WRITE | vq->avail_used_flags;
+ struct virtio_hw *hw = vq->hw;
+ struct vq_desc_extra *dxp;
+ uint16_t idx;
+ int i;
+
+ if (unlikely(vq->vq_free_cnt == 0))
+ return -ENOSPC;
+ if (unlikely(vq->vq_free_cnt < num))
+ return -EMSGSIZE;
+
+ for (i = 0; i < num; i++) {
+ idx = vq->vq_avail_idx;
+ dxp = &vq->vq_descx[idx];
+ dxp->cookie = (void *)cookie[i];
+ dxp->ndescs = 1;
+
+ start_dp[idx].addr = VIRTIO_MBUF_ADDR(cookie[i], vq) +
+ RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
+ start_dp[idx].len = cookie[i]->buf_len - RTE_PKTMBUF_HEADROOM
+ + hw->vtnet_hdr_size;
+
+ vq->vq_desc_head_idx = dxp->next;
+ if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
+ vq->vq_desc_tail_idx = vq->vq_desc_head_idx;
+ rte_smp_wmb();
+ start_dp[idx].flags = flags;
+ if (++vq->vq_avail_idx >= vq->vq_nentries) {
+ vq->vq_avail_idx -= vq->vq_nentries;
+ vq->avail_wrap_counter ^= 1;
+ vq->avail_used_flags =
+ VRING_DESC_F_AVAIL(vq->avail_wrap_counter) |
+ VRING_DESC_F_USED(!vq->avail_wrap_counter);
+ flags = VRING_DESC_F_WRITE | vq->avail_used_flags;
+ }
+ }
+ vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
+ return 0;
+}
+
/* When doing TSO, the IP length is not included in the pseudo header
* checksum of the packet given to the PMD, but for virtio it is
* expected.
}
}
-static inline int
-tx_offload_enabled(struct virtio_hw *hw)
-{
- return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
- vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
- vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
-}
/* avoid write operation when necessary, to lessen cache issues */
#define ASSIGN_UNLESS_EQUAL(var, val) do { \
static inline void
virtqueue_xmit_offload(struct virtio_net_hdr *hdr,
struct rte_mbuf *cookie,
- int offload)
+ bool offload)
{
if (offload) {
if (cookie->ol_flags & PKT_TX_TCP_SEG)
struct virtio_net_hdr *hdr;
uint16_t idx;
uint16_t head_size = vq->hw->vtnet_hdr_size;
- int offload;
uint16_t i = 0;
idx = vq->vq_desc_head_idx;
start_dp = vq->vq_ring.desc;
- offload = tx_offload_enabled(vq->hw);
-
while (i < num) {
idx = idx & (vq->vq_nentries - 1);
dxp = &vq->vq_descx[idx];
cookies[i]->pkt_len -= head_size;
/* if offload disabled, it is not zeroed below, do it now */
- if (offload == 0) {
+ if (!vq->hw->has_tx_offload) {
ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
ASSIGN_UNLESS_EQUAL(hdr->hdr_len, 0);
}
- virtqueue_xmit_offload(hdr, cookies[i], offload);
+ virtqueue_xmit_offload(hdr, cookies[i],
+ vq->hw->has_tx_offload);
start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookies[i], vq);
start_dp[idx].len = cookies[i]->data_len;
vq->vq_desc_head_idx = idx & (vq->vq_nentries - 1);
}
+static inline void
+virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
+ uint16_t needed, int can_push)
+{
+ struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
+ struct vq_desc_extra *dxp;
+ struct virtqueue *vq = txvq->vq;
+ struct vring_packed_desc *start_dp, *head_dp;
+ uint16_t idx, id, head_idx, head_flags;
+ uint16_t head_size = vq->hw->vtnet_hdr_size;
+ struct virtio_net_hdr *hdr;
+ uint16_t prev;
+
+ id = vq->vq_desc_head_idx;
+
+ dxp = &vq->vq_descx[id];
+ dxp->ndescs = needed;
+ dxp->cookie = cookie;
+
+ head_idx = vq->vq_avail_idx;
+ idx = head_idx;
+ prev = head_idx;
+ start_dp = vq->ring_packed.desc_packed;
+
+ head_dp = &vq->ring_packed.desc_packed[idx];
+ head_flags = cookie->next ? VRING_DESC_F_NEXT : 0;
+ head_flags |= vq->avail_used_flags;
+
+ if (can_push) {
+ /* prepend cannot fail, checked by caller */
+ hdr = (struct virtio_net_hdr *)
+ rte_pktmbuf_prepend(cookie, head_size);
+ /* rte_pktmbuf_prepend() counts the hdr size to the pkt length,
+ * which is wrong. Below subtract restores correct pkt size.
+ */
+ cookie->pkt_len -= head_size;
+
+ /* if offload disabled, it is not zeroed below, do it now */
+ if (!vq->hw->has_tx_offload) {
+ ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->gso_type, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->gso_size, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->hdr_len, 0);
+ }
+ } else {
+ /* setup first tx ring slot to point to header
+ * stored in reserved region.
+ */
+ start_dp[idx].addr = txvq->virtio_net_hdr_mem +
+ RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
+ start_dp[idx].len = vq->hw->vtnet_hdr_size;
+ hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
+ idx++;
+ if (idx >= vq->vq_nentries) {
+ idx -= vq->vq_nentries;
+ vq->avail_wrap_counter ^= 1;
+ vq->avail_used_flags =
+ VRING_DESC_F_AVAIL(vq->avail_wrap_counter) |
+ VRING_DESC_F_USED(!vq->avail_wrap_counter);
+ }
+ }
+
+ virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload);
+
+ do {
+ uint16_t flags;
+
+ start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq);
+ start_dp[idx].len = cookie->data_len;
+ if (likely(idx != head_idx)) {
+ flags = cookie->next ? VRING_DESC_F_NEXT : 0;
+ flags |= vq->avail_used_flags;
+ start_dp[idx].flags = flags;
+ }
+ prev = idx;
+ idx++;
+ if (idx >= vq->vq_nentries) {
+ idx -= vq->vq_nentries;
+ vq->avail_wrap_counter ^= 1;
+ vq->avail_used_flags =
+ VRING_DESC_F_AVAIL(vq->avail_wrap_counter) |
+ VRING_DESC_F_USED(!vq->avail_wrap_counter);
+ }
+ } while ((cookie = cookie->next) != NULL);
+
+ start_dp[prev].id = id;
+
+ vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
+
+ vq->vq_desc_head_idx = dxp->next;
+ if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
+ vq->vq_desc_tail_idx = VQ_RING_DESC_CHAIN_END;
+
+ vq->vq_avail_idx = idx;
+
+ rte_smp_wmb();
+ head_dp->flags = head_flags;
+}
+
static inline void
virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
uint16_t needed, int use_indirect, int can_push,
uint16_t head_idx, idx;
uint16_t head_size = vq->hw->vtnet_hdr_size;
struct virtio_net_hdr *hdr;
- int offload;
-
- offload = tx_offload_enabled(vq->hw);
head_idx = vq->vq_desc_head_idx;
idx = head_idx;
cookie->pkt_len -= head_size;
/* if offload disabled, it is not zeroed below, do it now */
- if (offload == 0) {
+ if (!vq->hw->has_tx_offload) {
ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
idx = start_dp[idx].next;
}
- virtqueue_xmit_offload(hdr, cookie, offload);
+ virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload);
do {
start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq);
break;
/* Enqueue allocated buffers */
- error = virtqueue_enqueue_recv_refill(vq, m);
+ if (vtpci_packed_queue(vq->hw))
+ error = virtqueue_enqueue_recv_refill_packed(vq,
+ &m, 1);
+ else
+ error = virtqueue_enqueue_recv_refill(vq, m);
if (error) {
rte_pktmbuf_free(m);
break;
nbufs++;
}
- vq_update_avail_idx(vq);
+ if (!vtpci_packed_queue(vq->hw))
+ vq_update_avail_idx(vq);
}
PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs);
PMD_INIT_FUNC_TRACE();
- if (hw->use_inorder_tx)
- vq->vq_ring.desc[vq->vq_nentries - 1].next = 0;
+ if (!vtpci_packed_queue(hw)) {
+ if (hw->use_inorder_tx)
+ vq->vq_ring.desc[vq->vq_nentries - 1].next = 0;
+ }
VIRTQUEUE_DUMP(vq);
return 0;
}
-static void
+static inline void
virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m)
{
int error;
* Requeue the discarded mbuf. This should always be
* successful since it was just dequeued.
*/
- error = virtqueue_enqueue_recv_refill(vq, m);
+ if (vtpci_packed_queue(vq->hw))
+ error = virtqueue_enqueue_recv_refill_packed(vq, &m, 1);
+ else
+ error = virtqueue_enqueue_recv_refill(vq, m);
if (unlikely(error)) {
RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
}
}
-static void
+static inline void
virtio_discard_rxbuf_inorder(struct virtqueue *vq, struct rte_mbuf *m)
{
int error;
}
}
-static void
+static inline void
virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf)
{
uint32_t s = mbuf->pkt_len;
struct ether_addr *ea;
+ stats->bytes += s;
+
if (s == 64) {
stats->size_bins[1]++;
} else if (s > 64 && s < 1024) {
{
VIRTIO_DUMP_PACKET(m, m->data_len);
- rxvq->stats.bytes += m->pkt_len;
virtio_update_packet_stats(&rxvq->stats, m);
}
/* Optionally fill offload information in structure */
-static int
+static inline int
virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr)
{
struct rte_net_hdr_lens hdr_lens;
return 0;
}
-static inline int
-rx_offload_enabled(struct virtio_hw *hw)
-{
- return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
- vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
- vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
-}
-
#define VIRTIO_MBUF_BURST_SZ 64
#define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
uint16_t
int error;
uint32_t i, nb_enqueued;
uint32_t hdr_size;
- int offload;
struct virtio_net_hdr *hdr;
nb_rx = 0;
nb_enqueued = 0;
hdr_size = hw->vtnet_hdr_size;
- offload = rx_offload_enabled(hw);
for (i = 0; i < num ; i++) {
rxm = rcv_pkts[i];
if (hw->vlan_strip)
rte_vlan_strip(rxm);
- if (offload && virtio_rx_offload(rxm, hdr) < 0) {
+ if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
virtio_discard_rxbuf(vq, rxm);
rxvq->stats.errors++;
continue;
rxvq->stats.packets += nb_rx;
/* Allocate new mbuf for the used descriptor */
- error = ENOSPC;
while (likely(!virtqueue_full(vq))) {
new_mbuf = rte_mbuf_raw_alloc(rxvq->mpool);
if (unlikely(new_mbuf == NULL)) {
}
uint16_t
-virtio_recv_mergeable_pkts_inorder(void *rx_queue,
+virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct virtnet_rx *rxvq = rx_queue;
+ struct virtqueue *vq = rxvq->vq;
+ struct virtio_hw *hw = vq->hw;
+ struct rte_mbuf *rxm, *new_mbuf;
+ uint16_t num, nb_rx;
+ uint32_t len[VIRTIO_MBUF_BURST_SZ];
+ struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
+ int error;
+ uint32_t i, nb_enqueued;
+ uint32_t hdr_size;
+ struct virtio_net_hdr *hdr;
+
+ nb_rx = 0;
+ if (unlikely(hw->started == 0))
+ return nb_rx;
+
+ num = RTE_MIN(VIRTIO_MBUF_BURST_SZ, nb_pkts);
+ if (likely(num > DESC_PER_CACHELINE))
+ num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
+
+ num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
+ PMD_RX_LOG(DEBUG, "dequeue:%d", num);
+
+ nb_enqueued = 0;
+ hdr_size = hw->vtnet_hdr_size;
+
+ for (i = 0; i < num; i++) {
+ rxm = rcv_pkts[i];
+
+ PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
+
+ if (unlikely(len[i] < hdr_size + ETHER_HDR_LEN)) {
+ PMD_RX_LOG(ERR, "Packet drop");
+ nb_enqueued++;
+ virtio_discard_rxbuf(vq, rxm);
+ rxvq->stats.errors++;
+ continue;
+ }
+
+ rxm->port = rxvq->port_id;
+ rxm->data_off = RTE_PKTMBUF_HEADROOM;
+ rxm->ol_flags = 0;
+ rxm->vlan_tci = 0;
+
+ rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
+ rxm->data_len = (uint16_t)(len[i] - hdr_size);
+
+ hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
+ RTE_PKTMBUF_HEADROOM - hdr_size);
+
+ if (hw->vlan_strip)
+ rte_vlan_strip(rxm);
+
+ if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
+ virtio_discard_rxbuf(vq, rxm);
+ rxvq->stats.errors++;
+ continue;
+ }
+
+ virtio_rx_stats_updated(rxvq, rxm);
+
+ rx_pkts[nb_rx++] = rxm;
+ }
+
+ rxvq->stats.packets += nb_rx;
+
+ /* Allocate new mbuf for the used descriptor */
+ while (likely(!virtqueue_full(vq))) {
+ new_mbuf = rte_mbuf_raw_alloc(rxvq->mpool);
+ if (unlikely(new_mbuf == NULL)) {
+ struct rte_eth_dev *dev =
+ &rte_eth_devices[rxvq->port_id];
+ dev->data->rx_mbuf_alloc_failed++;
+ break;
+ }
+ error = virtqueue_enqueue_recv_refill_packed(vq, &new_mbuf, 1);
+ if (unlikely(error)) {
+ rte_pktmbuf_free(new_mbuf);
+ break;
+ }
+ nb_enqueued++;
+ }
+
+ if (likely(nb_enqueued)) {
+ if (unlikely(virtqueue_kick_prepare_packed(vq))) {
+ virtqueue_notify(vq);
+ PMD_RX_LOG(DEBUG, "Notified");
+ }
+ }
+
+ return nb_rx;
+}
+
+
+uint16_t
+virtio_recv_pkts_inorder(void *rx_queue,
struct rte_mbuf **rx_pkts,
uint16_t nb_pkts)
{
uint32_t seg_res;
uint32_t hdr_size;
int32_t i;
- int offload;
nb_rx = 0;
if (unlikely(hw->started == 0))
seg_num = 1;
seg_res = 0;
hdr_size = hw->vtnet_hdr_size;
- offload = rx_offload_enabled(hw);
num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used);
header = (struct virtio_net_hdr_mrg_rxbuf *)
((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
- hdr_size);
- seg_num = header->num_buffers;
- if (seg_num == 0)
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
+ seg_num = header->num_buffers;
+ if (seg_num == 0)
+ seg_num = 1;
+ } else {
seg_num = 1;
+ }
rxm->data_off = RTE_PKTMBUF_HEADROOM;
rxm->nb_segs = seg_num;
rx_pkts[nb_rx] = rxm;
prev = rxm;
- if (offload && virtio_rx_offload(rxm, &header->hdr) < 0) {
+ if (vq->hw->has_rx_offload &&
+ virtio_rx_offload(rxm, &header->hdr) < 0) {
virtio_discard_rxbuf_inorder(vq, rxm);
rxvq->stats.errors++;
continue;
uint16_t extra_idx;
uint32_t seg_res;
uint32_t hdr_size;
- int offload;
nb_rx = 0;
if (unlikely(hw->started == 0))
extra_idx = 0;
seg_res = 0;
hdr_size = hw->vtnet_hdr_size;
- offload = rx_offload_enabled(hw);
while (i < nb_used) {
struct virtio_net_hdr_mrg_rxbuf *header;
rx_pkts[nb_rx] = rxm;
prev = rxm;
- if (offload && virtio_rx_offload(rxm, &header->hdr) < 0) {
+ if (hw->has_rx_offload &&
+ virtio_rx_offload(rxm, &header->hdr) < 0) {
virtio_discard_rxbuf(vq, rxm);
rxvq->stats.errors++;
continue;
VIRTIO_DUMP_PACKET(rx_pkts[nb_rx],
rx_pkts[nb_rx]->data_len);
- rxvq->stats.bytes += rx_pkts[nb_rx]->pkt_len;
virtio_update_packet_stats(&rxvq->stats, rx_pkts[nb_rx]);
nb_rx++;
}
rxvq->stats.packets += nb_rx;
/* Allocate new mbuf for the used descriptor */
- error = ENOSPC;
while (likely(!virtqueue_full(vq))) {
new_mbuf = rte_mbuf_raw_alloc(rxvq->mpool);
if (unlikely(new_mbuf == NULL)) {
return nb_rx;
}
+uint16_t
+virtio_recv_mergeable_pkts_packed(void *rx_queue,
+ struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct virtnet_rx *rxvq = rx_queue;
+ struct virtqueue *vq = rxvq->vq;
+ struct virtio_hw *hw = vq->hw;
+ struct rte_mbuf *rxm;
+ struct rte_mbuf *prev = NULL;
+ uint16_t num, nb_rx = 0;
+ uint32_t len[VIRTIO_MBUF_BURST_SZ];
+ struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
+ uint32_t nb_enqueued = 0;
+ uint32_t seg_num = 0;
+ uint32_t seg_res = 0;
+ uint32_t hdr_size = hw->vtnet_hdr_size;
+ int32_t i;
+ int error;
+
+ if (unlikely(hw->started == 0))
+ return nb_rx;
+
+
+ num = nb_pkts;
+ if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
+ num = VIRTIO_MBUF_BURST_SZ;
+ if (likely(num > DESC_PER_CACHELINE))
+ num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
+
+ num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
+
+ for (i = 0; i < num; i++) {
+ struct virtio_net_hdr_mrg_rxbuf *header;
+
+ PMD_RX_LOG(DEBUG, "dequeue:%d", num);
+ PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
+
+ rxm = rcv_pkts[i];
+
+ if (unlikely(len[i] < hdr_size + ETHER_HDR_LEN)) {
+ PMD_RX_LOG(ERR, "Packet drop");
+ nb_enqueued++;
+ virtio_discard_rxbuf(vq, rxm);
+ rxvq->stats.errors++;
+ continue;
+ }
+
+ header = (struct virtio_net_hdr_mrg_rxbuf *)((char *)
+ rxm->buf_addr + RTE_PKTMBUF_HEADROOM - hdr_size);
+ seg_num = header->num_buffers;
+
+ if (seg_num == 0)
+ seg_num = 1;
+
+ rxm->data_off = RTE_PKTMBUF_HEADROOM;
+ rxm->nb_segs = seg_num;
+ rxm->ol_flags = 0;
+ rxm->vlan_tci = 0;
+ rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
+ rxm->data_len = (uint16_t)(len[i] - hdr_size);
+
+ rxm->port = rxvq->port_id;
+ rx_pkts[nb_rx] = rxm;
+ prev = rxm;
+
+ if (hw->has_rx_offload &&
+ virtio_rx_offload(rxm, &header->hdr) < 0) {
+ virtio_discard_rxbuf(vq, rxm);
+ rxvq->stats.errors++;
+ continue;
+ }
+
+ if (hw->vlan_strip)
+ rte_vlan_strip(rx_pkts[nb_rx]);
+
+ seg_res = seg_num - 1;
+
+ /* Merge remaining segments */
+ while (seg_res != 0 && i < (num - 1)) {
+ i++;
+
+ rxm = rcv_pkts[i];
+ rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
+ rxm->pkt_len = (uint32_t)(len[i]);
+ rxm->data_len = (uint16_t)(len[i]);
+
+ rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
+ rx_pkts[nb_rx]->data_len += (uint16_t)(len[i]);
+
+ if (prev)
+ prev->next = rxm;
+
+ prev = rxm;
+ seg_res -= 1;
+ }
+
+ if (!seg_res) {
+ virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
+ nb_rx++;
+ }
+ }
+
+ /* Last packet still need merge segments */
+ while (seg_res != 0) {
+ uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
+ VIRTIO_MBUF_BURST_SZ);
+ if (likely(vq->vq_free_cnt >= rcv_cnt)) {
+ num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts,
+ len, rcv_cnt);
+ uint16_t extra_idx = 0;
+
+ rcv_cnt = num;
+
+ while (extra_idx < rcv_cnt) {
+ rxm = rcv_pkts[extra_idx];
+
+ rxm->data_off =
+ RTE_PKTMBUF_HEADROOM - hdr_size;
+ rxm->pkt_len = (uint32_t)(len[extra_idx]);
+ rxm->data_len = (uint16_t)(len[extra_idx]);
+
+ prev->next = rxm;
+ prev = rxm;
+ rx_pkts[nb_rx]->pkt_len += len[extra_idx];
+ rx_pkts[nb_rx]->data_len += len[extra_idx];
+ extra_idx += 1;
+ }
+ seg_res -= rcv_cnt;
+ if (!seg_res) {
+ virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
+ nb_rx++;
+ }
+ } else {
+ PMD_RX_LOG(ERR,
+ "No enough segments for packet.");
+ if (prev)
+ virtio_discard_rxbuf(vq, prev);
+ rxvq->stats.errors++;
+ break;
+ }
+ }
+
+ rxvq->stats.packets += nb_rx;
+
+ /* Allocate new mbuf for the used descriptor */
+ if (likely(!virtqueue_full(vq))) {
+ /* free_cnt may include mrg descs */
+ uint16_t free_cnt = vq->vq_free_cnt;
+ struct rte_mbuf *new_pkts[free_cnt];
+
+ if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
+ error = virtqueue_enqueue_recv_refill_packed(vq,
+ new_pkts, free_cnt);
+ if (unlikely(error)) {
+ for (i = 0; i < free_cnt; i++)
+ rte_pktmbuf_free(new_pkts[i]);
+ }
+ nb_enqueued += free_cnt;
+ } else {
+ struct rte_eth_dev *dev =
+ &rte_eth_devices[rxvq->port_id];
+ dev->data->rx_mbuf_alloc_failed += free_cnt;
+ }
+ }
+
+ if (likely(nb_enqueued)) {
+ if (unlikely(virtqueue_kick_prepare_packed(vq))) {
+ virtqueue_notify(vq);
+ PMD_RX_LOG(DEBUG, "Notified");
+ }
+ }
+
+ return nb_rx;
+}
+
+uint16_t
+virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts)
+{
+ struct virtnet_tx *txvq = tx_queue;
+ struct virtqueue *vq = txvq->vq;
+ struct virtio_hw *hw = vq->hw;
+ uint16_t hdr_size = hw->vtnet_hdr_size;
+ uint16_t nb_tx = 0;
+ int error;
+
+ if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
+ return nb_tx;
+
+ if (unlikely(nb_pkts < 1))
+ return nb_pkts;
+
+ PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
+
+ if (nb_pkts > vq->vq_free_cnt)
+ virtio_xmit_cleanup_packed(vq, nb_pkts - vq->vq_free_cnt);
+
+ for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
+ struct rte_mbuf *txm = tx_pkts[nb_tx];
+ int can_push = 0, slots, need;
+
+ /* Do VLAN tag insertion */
+ if (unlikely(txm->ol_flags & PKT_TX_VLAN_PKT)) {
+ error = rte_vlan_insert(&txm);
+ if (unlikely(error)) {
+ rte_pktmbuf_free(txm);
+ continue;
+ }
+ }
+
+ /* optimize ring usage */
+ if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
+ vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
+ rte_mbuf_refcnt_read(txm) == 1 &&
+ RTE_MBUF_DIRECT(txm) &&
+ txm->nb_segs == 1 &&
+ rte_pktmbuf_headroom(txm) >= hdr_size &&
+ rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
+ __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
+ can_push = 1;
+
+ /* How many main ring entries are needed to this Tx?
+ * any_layout => number of segments
+ * default => number of segments + 1
+ */
+ slots = txm->nb_segs + !can_push;
+ need = slots - vq->vq_free_cnt;
+
+ /* Positive value indicates it need free vring descriptors */
+ if (unlikely(need > 0)) {
+ virtio_rmb();
+ need = RTE_MIN(need, (int)nb_pkts);
+ virtio_xmit_cleanup_packed(vq, need);
+ need = slots - vq->vq_free_cnt;
+ if (unlikely(need > 0)) {
+ PMD_TX_LOG(ERR,
+ "No free tx descriptors to transmit");
+ break;
+ }
+ }
+
+ /* Enqueue Packet buffers */
+ virtqueue_enqueue_xmit_packed(txvq, txm, slots, can_push);
+
+ virtio_update_packet_stats(&txvq->stats, txm);
+ }
+
+ txvq->stats.packets += nb_tx;
+
+ if (likely(nb_tx)) {
+ if (unlikely(virtqueue_kick_prepare_packed(vq))) {
+ virtqueue_notify(vq);
+ PMD_TX_LOG(DEBUG, "Notified backend after xmit");
+ }
+ }
+
+ return nb_tx;
+}
+
uint16_t
virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect,
can_push, 0);
- txvq->stats.bytes += txm->pkt_len;
virtio_update_packet_stats(&txvq->stats, txm);
}
inorder_pkts[nb_inorder_pkts] = txm;
nb_inorder_pkts++;
- txvq->stats.bytes += txm->pkt_len;
virtio_update_packet_stats(&txvq->stats, txm);
continue;
}
/* Enqueue Packet buffers */
virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1);
- txvq->stats.bytes += txm->pkt_len;
virtio_update_packet_stats(&txvq->stats, txm);
}