#define BURST_RX_WAIT_US 15 /* Defines how long we wait between retries on RX */
#define BURST_RX_RETRIES 4 /* Number of retries on RX. */
+#define JUMBO_FRAME_MAX_SIZE 0x2600
+
/* State of virtio device. */
#define DEVICE_MAC_LEARNING 0
#define DEVICE_RX 1
us_vhost_usage(prgname);
return -1;
} else {
- if (ret)
+ if (ret) {
+ vmdq_conf_default.rxmode.jumbo_frame = 1;
+ vmdq_conf_default.rxmode.max_rx_pkt_len
+ = JUMBO_FRAME_MAX_SIZE;
VHOST_FEATURES = (1ULL << VIRTIO_NET_F_MRG_RXBUF);
+ }
}
}
return -1;
}
+ if ((zero_copy == 1) && (vmdq_conf_default.rxmode.jumbo_frame == 1)) {
+ RTE_LOG(INFO, VHOST_PORT,
+ "Vhost zero copy doesn't support jumbo frame,"
+ "please specify '--mergeable 0' to disable the "
+ "mergeable feature.\n");
+ return -1;
+ }
+
return 0;
}
* This function adds buffers to the virtio devices RX virtqueue. Buffers can
* be received from the physical port or from another virtio device. A packet
* count is returned to indicate the number of packets that were succesfully
- * added to the RX queue.
+ * added to the RX queue. This function works when mergeable is disabled.
*/
static inline uint32_t __attribute__((always_inline))
virtio_dev_rx(struct virtio_net *dev, struct rte_mbuf **pkts, uint32_t count)
uint64_t buff_hdr_addr = 0;
uint32_t head[MAX_PKT_BURST], packet_len = 0;
uint32_t head_idx, packet_success = 0;
- uint32_t mergeable, mrg_count = 0;
uint32_t retry = 0;
uint16_t avail_idx, res_cur_idx;
uint16_t res_base_idx, res_end_idx;
LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_rx()\n", dev->device_fh);
vq = dev->virtqueue[VIRTIO_RXQ];
count = (count > MAX_PKT_BURST) ? MAX_PKT_BURST : count;
+
/* As many data cores may want access to available buffers, they need to be reserved. */
do {
res_base_idx = vq->last_used_idx_res;
/* Prefetch available ring to retrieve indexes. */
rte_prefetch0(&vq->avail->ring[res_cur_idx & (vq->size - 1)]);
- /* Check if the VIRTIO_NET_F_MRG_RXBUF feature is enabled. */
- mergeable = dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF);
-
/* Retrieve all of the head indexes first to avoid caching issues. */
for (head_idx = 0; head_idx < count; head_idx++)
head[head_idx] = vq->avail->ring[(res_cur_idx + head_idx) & (vq->size - 1)];
/* Prefetch buffer address. */
rte_prefetch0((void*)(uintptr_t)buff_addr);
- if (mergeable && (mrg_count != 0)) {
- desc->len = packet_len = rte_pktmbuf_data_len(buff);
- } else {
- /* Copy virtio_hdr to packet and increment buffer address */
- buff_hdr_addr = buff_addr;
- packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen;
+ /* Copy virtio_hdr to packet and increment buffer address */
+ buff_hdr_addr = buff_addr;
+ packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen;
- /*
- * If the descriptors are chained the header and data are placed in
- * separate buffers.
- */
- if (desc->flags & VRING_DESC_F_NEXT) {
- desc->len = vq->vhost_hlen;
- desc = &vq->desc[desc->next];
- /* Buffer address translation. */
- buff_addr = gpa_to_vva(dev, desc->addr);
- desc->len = rte_pktmbuf_data_len(buff);
- } else {
- buff_addr += vq->vhost_hlen;
- desc->len = packet_len;
- }
+ /*
+ * If the descriptors are chained the header and data are
+ * placed in separate buffers.
+ */
+ if (desc->flags & VRING_DESC_F_NEXT) {
+ desc->len = vq->vhost_hlen;
+ desc = &vq->desc[desc->next];
+ /* Buffer address translation. */
+ buff_addr = gpa_to_vva(dev, desc->addr);
+ desc->len = rte_pktmbuf_data_len(buff);
+ } else {
+ buff_addr += vq->vhost_hlen;
+ desc->len = packet_len;
}
- PRINT_PACKET(dev, (uintptr_t)buff_addr, rte_pktmbuf_data_len(buff), 0);
-
/* Update used ring with desc information */
vq->used->ring[res_cur_idx & (vq->size - 1)].id = head[packet_success];
vq->used->ring[res_cur_idx & (vq->size - 1)].len = packet_len;
/* Copy mbuf data to buffer */
- rte_memcpy((void *)(uintptr_t)buff_addr, (const void*)buff->pkt.data, rte_pktmbuf_data_len(buff));
+ rte_memcpy((void *)(uintptr_t)buff_addr,
+ (const void *)buff->pkt.data,
+ rte_pktmbuf_data_len(buff));
+ PRINT_PACKET(dev, (uintptr_t)buff_addr,
+ rte_pktmbuf_data_len(buff), 0);
res_cur_idx++;
packet_success++;
- /* If mergeable is disabled then a header is required per buffer. */
- if (!mergeable) {
- rte_memcpy((void *)(uintptr_t)buff_hdr_addr, (const void*)&virtio_hdr, vq->vhost_hlen);
- PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1);
- } else {
- mrg_count++;
- /* Merge buffer can only handle so many buffers at a time. Tell the guest if this limit is reached. */
- if ((mrg_count == MAX_MRG_PKT_BURST) || (res_cur_idx == res_end_idx)) {
- virtio_hdr.num_buffers = mrg_count;
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") RX: Num merge buffers %d\n", dev->device_fh, virtio_hdr.num_buffers);
- rte_memcpy((void *)(uintptr_t)buff_hdr_addr, (const void*)&virtio_hdr, vq->vhost_hlen);
- PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1);
- mrg_count = 0;
- }
- }
+ rte_memcpy((void *)(uintptr_t)buff_hdr_addr,
+ (const void *)&virtio_hdr, vq->vhost_hlen);
+
+ PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1);
+
if (res_cur_idx < res_end_idx) {
/* Prefetch descriptor index. */
rte_prefetch0(&vq->desc[head[packet_success]]);
return count;
}
+static inline uint32_t __attribute__((always_inline))
+copy_from_mbuf_to_vring(struct virtio_net *dev,
+ uint16_t res_base_idx, uint16_t res_end_idx,
+ struct rte_mbuf *pkt)
+{
+ uint32_t vec_idx = 0;
+ uint32_t entry_success = 0;
+ struct vhost_virtqueue *vq;
+ /* The virtio_hdr is initialised to 0. */
+ struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {
+ {0, 0, 0, 0, 0, 0}, 0};
+ uint16_t cur_idx = res_base_idx;
+ uint64_t vb_addr = 0;
+ uint64_t vb_hdr_addr = 0;
+ uint32_t seg_offset = 0;
+ uint32_t vb_offset = 0;
+ uint32_t seg_avail;
+ uint32_t vb_avail;
+ uint32_t cpy_len, entry_len;
+
+ if (pkt == NULL)
+ return 0;
+
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| "
+ "End Index %d\n",
+ dev->device_fh, cur_idx, res_end_idx);
+
+ /*
+ * Convert from gpa to vva
+ * (guest physical addr -> vhost virtual addr)
+ */
+ vq = dev->virtqueue[VIRTIO_RXQ];
+ vb_addr =
+ gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
+ vb_hdr_addr = vb_addr;
+
+ /* Prefetch buffer address. */
+ rte_prefetch0((void *)(uintptr_t)vb_addr);
+
+ virtio_hdr.num_buffers = res_end_idx - res_base_idx;
+
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") RX: Num merge buffers %d\n",
+ dev->device_fh, virtio_hdr.num_buffers);
+
+ rte_memcpy((void *)(uintptr_t)vb_hdr_addr,
+ (const void *)&virtio_hdr, vq->vhost_hlen);
+
+ PRINT_PACKET(dev, (uintptr_t)vb_hdr_addr, vq->vhost_hlen, 1);
+
+ seg_avail = rte_pktmbuf_data_len(pkt);
+ vb_offset = vq->vhost_hlen;
+ vb_avail =
+ vq->buf_vec[vec_idx].buf_len - vq->vhost_hlen;
+
+ entry_len = vq->vhost_hlen;
+
+ if (vb_avail == 0) {
+ uint32_t desc_idx =
+ vq->buf_vec[vec_idx].desc_idx;
+ vq->desc[desc_idx].len = vq->vhost_hlen;
+
+ if ((vq->desc[desc_idx].flags
+ & VRING_DESC_F_NEXT) == 0) {
+ /* Update used ring with desc information */
+ vq->used->ring[cur_idx & (vq->size - 1)].id
+ = vq->buf_vec[vec_idx].desc_idx;
+ vq->used->ring[cur_idx & (vq->size - 1)].len
+ = entry_len;
+
+ entry_len = 0;
+ cur_idx++;
+ entry_success++;
+ }
+
+ vec_idx++;
+ vb_addr =
+ gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
+
+ /* Prefetch buffer address. */
+ rte_prefetch0((void *)(uintptr_t)vb_addr);
+ vb_offset = 0;
+ vb_avail = vq->buf_vec[vec_idx].buf_len;
+ }
+
+ cpy_len = RTE_MIN(vb_avail, seg_avail);
+
+ while (cpy_len > 0) {
+ /* Copy mbuf data to vring buffer */
+ rte_memcpy((void *)(uintptr_t)(vb_addr + vb_offset),
+ (const void *)(rte_pktmbuf_mtod(pkt, char*) + seg_offset),
+ cpy_len);
+
+ PRINT_PACKET(dev,
+ (uintptr_t)(vb_addr + vb_offset),
+ cpy_len, 0);
+
+ seg_offset += cpy_len;
+ vb_offset += cpy_len;
+ seg_avail -= cpy_len;
+ vb_avail -= cpy_len;
+ entry_len += cpy_len;
+
+ if (seg_avail != 0) {
+ /*
+ * The virtio buffer in this vring
+ * entry reach to its end.
+ * But the segment doesn't complete.
+ */
+ if ((vq->desc[vq->buf_vec[vec_idx].desc_idx].flags &
+ VRING_DESC_F_NEXT) == 0) {
+ /* Update used ring with desc information */
+ vq->used->ring[cur_idx & (vq->size - 1)].id
+ = vq->buf_vec[vec_idx].desc_idx;
+ vq->used->ring[cur_idx & (vq->size - 1)].len
+ = entry_len;
+ entry_len = 0;
+ cur_idx++;
+ entry_success++;
+ }
+
+ vec_idx++;
+ vb_addr = gpa_to_vva(dev,
+ vq->buf_vec[vec_idx].buf_addr);
+ vb_offset = 0;
+ vb_avail = vq->buf_vec[vec_idx].buf_len;
+ cpy_len = RTE_MIN(vb_avail, seg_avail);
+ } else {
+ /*
+ * This current segment complete, need continue to
+ * check if the whole packet complete or not.
+ */
+ pkt = pkt->pkt.next;
+ if (pkt != NULL) {
+ /*
+ * There are more segments.
+ */
+ if (vb_avail == 0) {
+ /*
+ * This current buffer from vring is
+ * used up, need fetch next buffer
+ * from buf_vec.
+ */
+ uint32_t desc_idx =
+ vq->buf_vec[vec_idx].desc_idx;
+ vq->desc[desc_idx].len = vb_offset;
+
+ if ((vq->desc[desc_idx].flags &
+ VRING_DESC_F_NEXT) == 0) {
+ uint16_t wrapped_idx =
+ cur_idx & (vq->size - 1);
+ /*
+ * Update used ring with the
+ * descriptor information
+ */
+ vq->used->ring[wrapped_idx].id
+ = desc_idx;
+ vq->used->ring[wrapped_idx].len
+ = entry_len;
+ entry_success++;
+ entry_len = 0;
+ cur_idx++;
+ }
+
+ /* Get next buffer from buf_vec. */
+ vec_idx++;
+ vb_addr = gpa_to_vva(dev,
+ vq->buf_vec[vec_idx].buf_addr);
+ vb_avail =
+ vq->buf_vec[vec_idx].buf_len;
+ vb_offset = 0;
+ }
+
+ seg_offset = 0;
+ seg_avail = rte_pktmbuf_data_len(pkt);
+ cpy_len = RTE_MIN(vb_avail, seg_avail);
+ } else {
+ /*
+ * This whole packet completes.
+ */
+ uint32_t desc_idx =
+ vq->buf_vec[vec_idx].desc_idx;
+ vq->desc[desc_idx].len = vb_offset;
+
+ while (vq->desc[desc_idx].flags &
+ VRING_DESC_F_NEXT) {
+ desc_idx = vq->desc[desc_idx].next;
+ vq->desc[desc_idx].len = 0;
+ }
+
+ /* Update used ring with desc information */
+ vq->used->ring[cur_idx & (vq->size - 1)].id
+ = vq->buf_vec[vec_idx].desc_idx;
+ vq->used->ring[cur_idx & (vq->size - 1)].len
+ = entry_len;
+ entry_len = 0;
+ cur_idx++;
+ entry_success++;
+ seg_avail = 0;
+ cpy_len = RTE_MIN(vb_avail, seg_avail);
+ }
+ }
+ }
+
+ return entry_success;
+}
+
+/*
+ * This function adds buffers to the virtio devices RX virtqueue. Buffers can
+ * be received from the physical port or from another virtio device. A packet
+ * count is returned to indicate the number of packets that were succesfully
+ * added to the RX queue. This function works for mergeable RX.
+ */
+static inline uint32_t __attribute__((always_inline))
+virtio_dev_merge_rx(struct virtio_net *dev, struct rte_mbuf **pkts,
+ uint32_t count)
+{
+ struct vhost_virtqueue *vq;
+ uint32_t pkt_idx = 0, entry_success = 0;
+ uint32_t retry = 0;
+ uint16_t avail_idx, res_cur_idx;
+ uint16_t res_base_idx, res_end_idx;
+ uint8_t success = 0;
+
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_merge_rx()\n",
+ dev->device_fh);
+ vq = dev->virtqueue[VIRTIO_RXQ];
+ count = RTE_MIN((uint32_t)MAX_PKT_BURST, count);
+
+ if (count == 0)
+ return 0;
+
+ for (pkt_idx = 0; pkt_idx < count; pkt_idx++) {
+ uint32_t secure_len = 0;
+ uint16_t need_cnt;
+ uint32_t vec_idx = 0;
+ uint32_t pkt_len = pkts[pkt_idx]->pkt.pkt_len + vq->vhost_hlen;
+ uint16_t i, id;
+
+ do {
+ /*
+ * As many data cores may want access to available
+ * buffers, they need to be reserved.
+ */
+ res_base_idx = vq->last_used_idx_res;
+ res_cur_idx = res_base_idx;
+
+ do {
+ avail_idx = *((volatile uint16_t *)&vq->avail->idx);
+ if (unlikely(res_cur_idx == avail_idx)) {
+ /*
+ * If retry is enabled and the queue is
+ * full then we wait and retry to avoid
+ * packet loss.
+ */
+ if (enable_retry) {
+ uint8_t cont = 0;
+ for (retry = 0; retry < burst_rx_retry_num; retry++) {
+ rte_delay_us(burst_rx_delay_time);
+ avail_idx =
+ *((volatile uint16_t *)&vq->avail->idx);
+ if (likely(res_cur_idx != avail_idx)) {
+ cont = 1;
+ break;
+ }
+ }
+ if (cont == 1)
+ continue;
+ }
+
+ LOG_DEBUG(VHOST_DATA,
+ "(%"PRIu64") Failed "
+ "to get enough desc from "
+ "vring\n",
+ dev->device_fh);
+ return pkt_idx;
+ } else {
+ uint16_t wrapped_idx =
+ (res_cur_idx) & (vq->size - 1);
+ uint32_t idx =
+ vq->avail->ring[wrapped_idx];
+ uint8_t next_desc;
+
+ do {
+ next_desc = 0;
+ secure_len += vq->desc[idx].len;
+ if (vq->desc[idx].flags &
+ VRING_DESC_F_NEXT) {
+ idx = vq->desc[idx].next;
+ next_desc = 1;
+ }
+ } while (next_desc);
+
+ res_cur_idx++;
+ }
+ } while (pkt_len > secure_len);
+
+ /* vq->last_used_idx_res is atomically updated. */
+ success = rte_atomic16_cmpset(&vq->last_used_idx_res,
+ res_base_idx,
+ res_cur_idx);
+ } while (success == 0);
+
+ id = res_base_idx;
+ need_cnt = res_cur_idx - res_base_idx;
+
+ for (i = 0; i < need_cnt; i++, id++) {
+ uint16_t wrapped_idx = id & (vq->size - 1);
+ uint32_t idx = vq->avail->ring[wrapped_idx];
+ uint8_t next_desc;
+ do {
+ next_desc = 0;
+ vq->buf_vec[vec_idx].buf_addr =
+ vq->desc[idx].addr;
+ vq->buf_vec[vec_idx].buf_len =
+ vq->desc[idx].len;
+ vq->buf_vec[vec_idx].desc_idx = idx;
+ vec_idx++;
+
+ if (vq->desc[idx].flags & VRING_DESC_F_NEXT) {
+ idx = vq->desc[idx].next;
+ next_desc = 1;
+ }
+ } while (next_desc);
+ }
+
+ res_end_idx = res_cur_idx;
+
+ entry_success = copy_from_mbuf_to_vring(dev, res_base_idx,
+ res_end_idx, pkts[pkt_idx]);
+
+ rte_compiler_barrier();
+
+ /*
+ * Wait until it's our turn to add our buffer
+ * to the used ring.
+ */
+ while (unlikely(vq->last_used_idx != res_base_idx))
+ rte_pause();
+
+ *(volatile uint16_t *)&vq->used->idx += entry_success;
+ vq->last_used_idx = res_end_idx;
+
+ /* Kick the guest if necessary. */
+ if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
+ eventfd_write((int)vq->kickfd, 1);
+ }
+
+ return count;
+}
+
/*
* Compares a packet destination MAC address to a device MAC address.
*/
/*drop the packet if the device is marked for removal*/
LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Device is marked for removal\n", dev_ll->dev->device_fh);
} else {
+ uint32_t mergeable =
+ dev_ll->dev->features &
+ (1 << VIRTIO_NET_F_MRG_RXBUF);
+
/*send the packet to the local virtio device*/
- ret = virtio_dev_rx(dev_ll->dev, &m, 1);
+ if (likely(mergeable == 0))
+ ret = virtio_dev_rx(dev_ll->dev, &m, 1);
+ else
+ ret = virtio_dev_merge_rx(dev_ll->dev,
+ &m, 1);
+
if (enable_stats) {
rte_atomic64_add(
&dev_statistics[dev_ll->dev->device_fh].rx_total_atomic,
struct mbuf_table *tx_q;
struct vlan_ethhdr *vlan_hdr;
struct rte_mbuf **m_table;
- struct rte_mbuf *mbuf;
+ struct rte_mbuf *mbuf, *prev;
unsigned len, ret, offset = 0;
const uint16_t lcore_id = rte_lcore_id();
struct virtio_net_data_ll *dev_ll = ll_root_used;
/* Allocate an mbuf and populate the structure. */
mbuf = rte_pktmbuf_alloc(mbuf_pool);
if (unlikely(mbuf == NULL)) {
- RTE_LOG(ERR, VHOST_DATA, "Failed to allocate memory for mbuf.\n");
+ RTE_LOG(ERR, VHOST_DATA,
+ "Failed to allocate memory for mbuf.\n");
return;
}
mbuf->pkt.data_len = m->pkt.data_len + VLAN_HLEN + offset;
- mbuf->pkt.pkt_len = mbuf->pkt.data_len;
+ mbuf->pkt.pkt_len = m->pkt.pkt_len + VLAN_HLEN + offset;
+ mbuf->pkt.nb_segs = m->pkt.nb_segs;
/* Copy ethernet header to mbuf. */
rte_memcpy((void*)mbuf->pkt.data, (const void*)m->pkt.data, ETH_HLEN);
/* Copy the remaining packet contents to the mbuf. */
rte_memcpy((void*) ((uint8_t*)mbuf->pkt.data + VLAN_ETH_HLEN),
(const void*) ((uint8_t*)m->pkt.data + ETH_HLEN), (m->pkt.data_len - ETH_HLEN));
+
+ /* Copy the remaining segments for the whole packet. */
+ prev = mbuf;
+ while (m->pkt.next) {
+ /* Allocate an mbuf and populate the structure. */
+ struct rte_mbuf *next_mbuf = rte_pktmbuf_alloc(mbuf_pool);
+ if (unlikely(next_mbuf == NULL)) {
+ rte_pktmbuf_free(mbuf);
+ RTE_LOG(ERR, VHOST_DATA,
+ "Failed to allocate memory for mbuf.\n");
+ return;
+ }
+
+ m = m->pkt.next;
+ prev->pkt.next = next_mbuf;
+ prev = next_mbuf;
+ next_mbuf->pkt.data_len = m->pkt.data_len;
+
+ /* Copy data to next mbuf. */
+ rte_memcpy(rte_pktmbuf_mtod(next_mbuf, void *),
+ rte_pktmbuf_mtod(m, const void *), m->pkt.data_len);
+ }
+
tx_q->m_table[len] = mbuf;
len++;
if (enable_stats) {
/* Setup dummy mbuf. This is copied to a real mbuf if transmitted out the physical port. */
m.pkt.data_len = desc->len;
+ m.pkt.pkt_len = desc->len;
m.pkt.data = (void*)(uintptr_t)buff_addr;
PRINT_PACKET(dev, (uintptr_t)buff_addr, desc->len, 0);
eventfd_write((int)vq->kickfd, 1);
}
+/* This function works for TX packets with mergeable feature enabled. */
+static inline void __attribute__((always_inline))
+virtio_dev_merge_tx(struct virtio_net *dev, struct rte_mempool *mbuf_pool)
+{
+ struct rte_mbuf *m, *prev;
+ struct vhost_virtqueue *vq;
+ struct vring_desc *desc;
+ uint64_t vb_addr = 0;
+ uint32_t head[MAX_PKT_BURST];
+ uint32_t used_idx;
+ uint32_t i;
+ uint16_t free_entries, entry_success = 0;
+ uint16_t avail_idx;
+ uint32_t buf_size = MBUF_SIZE - (sizeof(struct rte_mbuf)
+ + RTE_PKTMBUF_HEADROOM);
+
+ vq = dev->virtqueue[VIRTIO_TXQ];
+ avail_idx = *((volatile uint16_t *)&vq->avail->idx);
+
+ /* If there are no available buffers then return. */
+ if (vq->last_used_idx == avail_idx)
+ return;
+
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_merge_tx()\n",
+ dev->device_fh);
+
+ /* Prefetch available ring to retrieve head indexes. */
+ rte_prefetch0(&vq->avail->ring[vq->last_used_idx & (vq->size - 1)]);
+
+ /*get the number of free entries in the ring*/
+ free_entries = (avail_idx - vq->last_used_idx);
+
+ /* Limit to MAX_PKT_BURST. */
+ free_entries = RTE_MIN(free_entries, MAX_PKT_BURST);
+
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Buffers available %d\n",
+ dev->device_fh, free_entries);
+ /* Retrieve all of the head indexes first to avoid caching issues. */
+ for (i = 0; i < free_entries; i++)
+ head[i] = vq->avail->ring[(vq->last_used_idx + i) & (vq->size - 1)];
+
+ /* Prefetch descriptor index. */
+ rte_prefetch0(&vq->desc[head[entry_success]]);
+ rte_prefetch0(&vq->used->ring[vq->last_used_idx & (vq->size - 1)]);
+
+ while (entry_success < free_entries) {
+ uint32_t vb_avail, vb_offset;
+ uint32_t seg_avail, seg_offset;
+ uint32_t cpy_len;
+ uint32_t seg_num = 0;
+ struct rte_mbuf *cur;
+ uint8_t alloc_err = 0;
+
+ desc = &vq->desc[head[entry_success]];
+
+ /* Discard first buffer as it is the virtio header */
+ desc = &vq->desc[desc->next];
+
+ /* Buffer address translation. */
+ vb_addr = gpa_to_vva(dev, desc->addr);
+ /* Prefetch buffer address. */
+ rte_prefetch0((void *)(uintptr_t)vb_addr);
+
+ used_idx = vq->last_used_idx & (vq->size - 1);
+
+ if (entry_success < (free_entries - 1)) {
+ /* Prefetch descriptor index. */
+ rte_prefetch0(&vq->desc[head[entry_success+1]]);
+ rte_prefetch0(&vq->used->ring[(used_idx + 1) & (vq->size - 1)]);
+ }
+
+ /* Update used index buffer information. */
+ vq->used->ring[used_idx].id = head[entry_success];
+ vq->used->ring[used_idx].len = 0;
+
+ vb_offset = 0;
+ vb_avail = desc->len;
+ seg_offset = 0;
+ seg_avail = buf_size;
+ cpy_len = RTE_MIN(vb_avail, seg_avail);
+
+ PRINT_PACKET(dev, (uintptr_t)vb_addr, desc->len, 0);
+
+ /* Allocate an mbuf and populate the structure. */
+ m = rte_pktmbuf_alloc(mbuf_pool);
+ if (unlikely(m == NULL)) {
+ RTE_LOG(ERR, VHOST_DATA,
+ "Failed to allocate memory for mbuf.\n");
+ return;
+ }
+
+ seg_num++;
+ cur = m;
+ prev = m;
+ while (cpy_len != 0) {
+ rte_memcpy((void *)(rte_pktmbuf_mtod(cur, char *) + seg_offset),
+ (void *)((uintptr_t)(vb_addr + vb_offset)),
+ cpy_len);
+
+ seg_offset += cpy_len;
+ vb_offset += cpy_len;
+ vb_avail -= cpy_len;
+ seg_avail -= cpy_len;
+
+ if (vb_avail != 0) {
+ /*
+ * The segment reachs to its end,
+ * while the virtio buffer in TX vring has
+ * more data to be copied.
+ */
+ cur->pkt.data_len = seg_offset;
+ m->pkt.pkt_len += seg_offset;
+ /* Allocate mbuf and populate the structure. */
+ cur = rte_pktmbuf_alloc(mbuf_pool);
+ if (unlikely(cur == NULL)) {
+ RTE_LOG(ERR, VHOST_DATA, "Failed to "
+ "allocate memory for mbuf.\n");
+ rte_pktmbuf_free(m);
+ alloc_err = 1;
+ break;
+ }
+
+ seg_num++;
+ prev->pkt.next = cur;
+ prev = cur;
+ seg_offset = 0;
+ seg_avail = buf_size;
+ } else {
+ if (desc->flags & VRING_DESC_F_NEXT) {
+ /*
+ * There are more virtio buffers in
+ * same vring entry need to be copied.
+ */
+ if (seg_avail == 0) {
+ /*
+ * The current segment hasn't
+ * room to accomodate more
+ * data.
+ */
+ cur->pkt.data_len = seg_offset;
+ m->pkt.pkt_len += seg_offset;
+ /*
+ * Allocate an mbuf and
+ * populate the structure.
+ */
+ cur = rte_pktmbuf_alloc(mbuf_pool);
+ if (unlikely(cur == NULL)) {
+ RTE_LOG(ERR,
+ VHOST_DATA,
+ "Failed to "
+ "allocate memory "
+ "for mbuf\n");
+ rte_pktmbuf_free(m);
+ alloc_err = 1;
+ break;
+ }
+ seg_num++;
+ prev->pkt.next = cur;
+ prev = cur;
+ seg_offset = 0;
+ seg_avail = buf_size;
+ }
+
+ desc = &vq->desc[desc->next];
+
+ /* Buffer address translation. */
+ vb_addr = gpa_to_vva(dev, desc->addr);
+ /* Prefetch buffer address. */
+ rte_prefetch0((void *)(uintptr_t)vb_addr);
+ vb_offset = 0;
+ vb_avail = desc->len;
+
+ PRINT_PACKET(dev, (uintptr_t)vb_addr,
+ desc->len, 0);
+ } else {
+ /* The whole packet completes. */
+ cur->pkt.data_len = seg_offset;
+ m->pkt.pkt_len += seg_offset;
+ vb_avail = 0;
+ }
+ }
+
+ cpy_len = RTE_MIN(vb_avail, seg_avail);
+ }
+
+ if (unlikely(alloc_err == 1))
+ break;
+
+ m->pkt.nb_segs = seg_num;
+
+ /*
+ * If this is the first received packet we need to learn
+ * the MAC and setup VMDQ
+ */
+ if (dev->ready == DEVICE_MAC_LEARNING) {
+ if (dev->remove || (link_vmdq(dev, m) == -1)) {
+ /*
+ * Discard frame if device is scheduled for
+ * removal or a duplicate MAC address is found.
+ */
+ entry_success = free_entries;
+ vq->last_used_idx += entry_success;
+ rte_pktmbuf_free(m);
+ break;
+ }
+ }
+
+ virtio_tx_route(dev, m, mbuf_pool, (uint16_t)dev->device_fh);
+ vq->last_used_idx++;
+ entry_success++;
+ rte_pktmbuf_free(m);
+ }
+
+ rte_compiler_barrier();
+ vq->used->idx += entry_success;
+ /* Kick guest if required. */
+ if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
+ eventfd_write((int)vq->kickfd, 1);
+
+}
+
/*
* This function is called by each data core. It handles all RX/TX registered with the
* core. For TX the specific lcore linked list is used. For RX, MAC addresses are compared
const uint16_t lcore_id = rte_lcore_id();
const uint16_t num_cores = (uint16_t)rte_lcore_count();
uint16_t rx_count = 0;
+ uint32_t mergeable = 0;
- RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started \n", lcore_id);
+ RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
lcore_ll = lcore_info[lcore_id].lcore_ll;
prev_tsc = 0;
while (dev_ll != NULL) {
/*get virtio device ID*/
dev = dev_ll->dev;
+ mergeable =
+ dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF);
if (dev->remove) {
dev_ll = dev_ll->next;
(uint16_t)dev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST);
if (rx_count) {
- ret_count = virtio_dev_rx(dev, pkts_burst, rx_count);
+ if (likely(mergeable == 0))
+ ret_count =
+ virtio_dev_rx(dev,
+ pkts_burst, rx_count);
+ else
+ ret_count =
+ virtio_dev_merge_rx(dev,
+ pkts_burst, rx_count);
+
if (enable_stats) {
rte_atomic64_add(
&dev_statistics[dev_ll->dev->device_fh].rx_total_atomic,
}
while (likely(rx_count)) {
rx_count--;
- rte_pktmbuf_free_seg(pkts_burst[rx_count]);
+ rte_pktmbuf_free(pkts_burst[rx_count]);
}
}
}
- if (!dev->remove)
+ if (!dev->remove) {
/*Handle guest TX*/
- virtio_dev_tx(dev, mbuf_pool);
+ if (likely(mergeable == 0))
+ virtio_dev_tx(dev, mbuf_pool);
+ else
+ virtio_dev_merge_tx(dev, mbuf_pool);
+ }
/*move to the next device in the list*/
dev_ll = dev_ll->next;
git.droids-corp.org / dpdk.git / commitdiff