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authorIlya Maximets <i.maximets@samsung.com>2016-05-03 02:30:41 +0800
committerYuanhan Liu <yuanhan.liu@linux.intel.com>2016-06-22 09:44:21 +0200
commit7fd5dde987cf1ffa709516a405ff4e7db13053fa (patch)
treea36b9127465425218def8ba4ea83cd9420c0df66 /lib/librte_vhost
parente197bd630a5cd3ed40e73f914837a03e2c6b3098 (diff)
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vhost: make buffer vector for scatter Rx local
Array of buf_vector's is just an array for temporary storing information about available descriptors. It used only locally in virtio_dev_merge_rx() and there is no reason for that array to be shared. Fix that by allocating local buf_vec inside virtio_dev_merge_rx(). Signed-off-by: Ilya Maximets <i.maximets@samsung.com> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com> Tested-by: Rich Lane <rich.lane@bigswitch.com> Acked-by: Rich Lane <rich.lane@bigswitch.com>
Diffstat (limited to 'lib/librte_vhost')
-rw-r--r--lib/librte_vhost/vhost-net.h1
-rw-r--r--lib/librte_vhost/vhost_rxtx.c41
2 files changed, 22 insertions, 20 deletions
diff --git a/lib/librte_vhost/vhost-net.h b/lib/librte_vhost/vhost-net.h
index 590a039..162ad04 100644
--- a/lib/librte_vhost/vhost-net.h
+++ b/lib/librte_vhost/vhost-net.h
@@ -87,7 +87,6 @@ struct vhost_virtqueue {
/* Physical address of used ring, for logging */
uint64_t log_guest_addr;
- struct buf_vector buf_vec[BUF_VECTOR_MAX];
} __rte_cache_aligned;
/* Old kernels have no such macro defined */
diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index c9cd1c5..96720db 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -335,7 +335,8 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
static inline int
fill_vec_buf(struct vhost_virtqueue *vq, uint32_t avail_idx,
- uint32_t *allocated, uint32_t *vec_idx)
+ uint32_t *allocated, uint32_t *vec_idx,
+ struct buf_vector *buf_vec)
{
uint16_t idx = vq->avail->ring[avail_idx & (vq->size - 1)];
uint32_t vec_id = *vec_idx;
@@ -346,9 +347,9 @@ fill_vec_buf(struct vhost_virtqueue *vq, uint32_t avail_idx,
return -1;
len += vq->desc[idx].len;
- vq->buf_vec[vec_id].buf_addr = vq->desc[idx].addr;
- vq->buf_vec[vec_id].buf_len = vq->desc[idx].len;
- vq->buf_vec[vec_id].desc_idx = idx;
+ buf_vec[vec_id].buf_addr = vq->desc[idx].addr;
+ buf_vec[vec_id].buf_len = vq->desc[idx].len;
+ buf_vec[vec_id].desc_idx = idx;
vec_id++;
if ((vq->desc[idx].flags & VRING_DESC_F_NEXT) == 0)
@@ -371,7 +372,8 @@ fill_vec_buf(struct vhost_virtqueue *vq, uint32_t avail_idx,
*/
static inline int
reserve_avail_buf_mergeable(struct vhost_virtqueue *vq, uint32_t size,
- uint16_t *start, uint16_t *end)
+ uint16_t *start, uint16_t *end,
+ struct buf_vector *buf_vec)
{
uint16_t res_start_idx;
uint16_t res_cur_idx;
@@ -393,7 +395,7 @@ again:
return -1;
if (unlikely(fill_vec_buf(vq, res_cur_idx, &allocated,
- &vec_idx) < 0))
+ &vec_idx, buf_vec) < 0))
return -1;
res_cur_idx++;
@@ -427,7 +429,7 @@ again:
static inline uint32_t __attribute__((always_inline))
copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
uint16_t res_start_idx, uint16_t res_end_idx,
- struct rte_mbuf *m)
+ struct rte_mbuf *m, struct buf_vector *buf_vec)
{
struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, 0, 0, 0, 0, 0}, 0};
uint32_t vec_idx = 0;
@@ -444,10 +446,10 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
LOG_DEBUG(VHOST_DATA, "(%d) current index %d | end index %d\n",
dev->vid, cur_idx, res_end_idx);
- if (vq->buf_vec[vec_idx].buf_len < dev->vhost_hlen)
+ if (buf_vec[vec_idx].buf_len < dev->vhost_hlen)
return -1;
- desc_addr = gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
+ desc_addr = gpa_to_vva(dev, buf_vec[vec_idx].buf_addr);
rte_prefetch0((void *)(uintptr_t)desc_addr);
virtio_hdr.num_buffers = res_end_idx - res_start_idx;
@@ -456,10 +458,10 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
virtio_enqueue_offload(m, &virtio_hdr.hdr);
copy_virtio_net_hdr(dev, desc_addr, virtio_hdr);
- vhost_log_write(dev, vq->buf_vec[vec_idx].buf_addr, dev->vhost_hlen);
+ vhost_log_write(dev, buf_vec[vec_idx].buf_addr, dev->vhost_hlen);
PRINT_PACKET(dev, (uintptr_t)desc_addr, dev->vhost_hlen, 0);
- desc_avail = vq->buf_vec[vec_idx].buf_len - dev->vhost_hlen;
+ desc_avail = buf_vec[vec_idx].buf_len - dev->vhost_hlen;
desc_offset = dev->vhost_hlen;
mbuf_avail = rte_pktmbuf_data_len(m);
@@ -467,7 +469,7 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
while (mbuf_avail != 0 || m->next != NULL) {
/* done with current desc buf, get the next one */
if (desc_avail == 0) {
- desc_idx = vq->buf_vec[vec_idx].desc_idx;
+ desc_idx = buf_vec[vec_idx].desc_idx;
if (!(vq->desc[desc_idx].flags & VRING_DESC_F_NEXT)) {
/* Update used ring with desc information */
@@ -481,12 +483,12 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
}
vec_idx++;
- desc_addr = gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
+ desc_addr = gpa_to_vva(dev, buf_vec[vec_idx].buf_addr);
/* Prefetch buffer address. */
rte_prefetch0((void *)(uintptr_t)desc_addr);
desc_offset = 0;
- desc_avail = vq->buf_vec[vec_idx].buf_len;
+ desc_avail = buf_vec[vec_idx].buf_len;
}
/* done with current mbuf, get the next one */
@@ -501,7 +503,7 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
rte_memcpy((void *)((uintptr_t)(desc_addr + desc_offset)),
rte_pktmbuf_mtod_offset(m, void *, mbuf_offset),
cpy_len);
- vhost_log_write(dev, vq->buf_vec[vec_idx].buf_addr + desc_offset,
+ vhost_log_write(dev, buf_vec[vec_idx].buf_addr + desc_offset,
cpy_len);
PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset),
cpy_len, 0);
@@ -513,7 +515,7 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq,
}
used_idx = cur_idx & (vq->size - 1);
- vq->used->ring[used_idx].id = vq->buf_vec[vec_idx].desc_idx;
+ vq->used->ring[used_idx].id = buf_vec[vec_idx].desc_idx;
vq->used->ring[used_idx].len = desc_offset;
vhost_log_used_vring(dev, vq,
offsetof(struct vring_used, ring[used_idx]),
@@ -529,6 +531,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id,
struct vhost_virtqueue *vq;
uint32_t pkt_idx = 0, nr_used = 0;
uint16_t start, end;
+ struct buf_vector buf_vec[BUF_VECTOR_MAX];
LOG_DEBUG(VHOST_DATA, "(%d) %s\n", dev->vid, __func__);
if (unlikely(!is_valid_virt_queue_idx(queue_id, 0, dev->virt_qp_nb))) {
@@ -548,8 +551,8 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id,
for (pkt_idx = 0; pkt_idx < count; pkt_idx++) {
uint32_t pkt_len = pkts[pkt_idx]->pkt_len + dev->vhost_hlen;
- if (unlikely(reserve_avail_buf_mergeable(vq, pkt_len,
- &start, &end) < 0)) {
+ if (unlikely(reserve_avail_buf_mergeable(vq, pkt_len, &start,
+ &end, buf_vec) < 0)) {
LOG_DEBUG(VHOST_DATA,
"(%d) failed to get enough desc from vring\n",
dev->vid);
@@ -557,7 +560,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id,
}
nr_used = copy_mbuf_to_desc_mergeable(dev, vq, start, end,
- pkts[pkt_idx]);
+ pkts[pkt_idx], buf_vec);
rte_smp_wmb();
/*