X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=lib%2Flibrte_vhost%2Fvirtio_net.c;h=bde360f3d925a004f69daf152613dc4f13da6924;hb=6e7cbd63706f3435b9d9a2057a37db1da01db9a7;hp=6fee16e5522cc51331aa579926da273e8893c047;hpb=055c52583a2794da8ba1e85a48cce3832372b12f;p=deb_dpdk.git diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index 6fee16e5..bde360f3 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -44,6 +44,8 @@ #include #include #include +#include +#include #include "iotlb.h" #include "vhost.h" @@ -58,6 +60,46 @@ is_valid_virt_queue_idx(uint32_t idx, int is_tx, uint32_t nr_vring) return (is_tx ^ (idx & 1)) == 0 && idx < nr_vring; } +static __rte_always_inline struct vring_desc * +alloc_copy_ind_table(struct virtio_net *dev, struct vhost_virtqueue *vq, + struct vring_desc *desc) +{ + struct vring_desc *idesc; + uint64_t src, dst; + uint64_t len, remain = desc->len; + uint64_t desc_addr = desc->addr; + + idesc = rte_malloc(__func__, desc->len, 0); + if (unlikely(!idesc)) + return 0; + + dst = (uint64_t)(uintptr_t)idesc; + + while (remain) { + len = remain; + src = vhost_iova_to_vva(dev, vq, desc_addr, &len, + VHOST_ACCESS_RO); + if (unlikely(!src || !len)) { + rte_free(idesc); + return 0; + } + + rte_memcpy((void *)(uintptr_t)dst, (void *)(uintptr_t)src, len); + + remain -= len; + dst += len; + desc_addr += len; + } + + return idesc; +} + +static __rte_always_inline void +free_ind_table(struct vring_desc *idesc) +{ + rte_free(idesc); +} + static __rte_always_inline void do_flush_shadow_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq, uint16_t to, uint16_t from, uint16_t size) @@ -65,7 +107,7 @@ do_flush_shadow_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq, rte_memcpy(&vq->used->ring[to], &vq->shadow_used_ring[from], size * sizeof(struct vring_used_elem)); - vhost_log_used_vring(dev, vq, + vhost_log_cache_used_vring(dev, vq, offsetof(struct vring_used, ring[to]), size * sizeof(struct vring_used_elem)); } @@ -93,6 +135,8 @@ flush_shadow_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq) rte_smp_wmb(); + vhost_log_cache_sync(dev, vq); + *(volatile uint16_t *)&vq->used->idx += vq->shadow_used_idx; vhost_log_used_vring(dev, vq, offsetof(struct vring_used, idx), sizeof(vq->used->idx)); @@ -117,7 +161,7 @@ do_data_copy_enqueue(struct virtio_net *dev, struct vhost_virtqueue *vq) for (i = 0; i < count; i++) { rte_memcpy(elem[i].dst, elem[i].src, elem[i].len); - vhost_log_write(dev, elem[i].log_addr, elem[i].len); + vhost_log_cache_write(dev, vq, elem[i].log_addr, elem[i].len); PRINT_PACKET(dev, (uintptr_t)elem[i].dst, elem[i].len, 0); } } @@ -203,8 +247,9 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, uint32_t desc_avail, desc_offset; uint32_t mbuf_avail, mbuf_offset; uint32_t cpy_len; + uint64_t desc_chunck_len; struct vring_desc *desc; - uint64_t desc_addr; + uint64_t desc_addr, desc_gaddr; /* A counter to avoid desc dead loop chain */ uint16_t nr_desc = 1; struct batch_copy_elem *batch_copy = vq->batch_copy_elems; @@ -212,8 +257,10 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, int error = 0; desc = &descs[desc_idx]; - desc_addr = vhost_iova_to_vva(dev, vq, desc->addr, - desc->len, VHOST_ACCESS_RW); + desc_chunck_len = desc->len; + desc_gaddr = desc->addr; + desc_addr = vhost_iova_to_vva(dev, vq, desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RW); /* * Checking of 'desc_addr' placed outside of 'unlikely' macro to avoid * performance issue with some versions of gcc (4.8.4 and 5.3.0) which @@ -226,12 +273,58 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, rte_prefetch0((void *)(uintptr_t)desc_addr); - virtio_enqueue_offload(m, (struct virtio_net_hdr *)(uintptr_t)desc_addr); - vhost_log_write(dev, desc->addr, dev->vhost_hlen); - PRINT_PACKET(dev, (uintptr_t)desc_addr, dev->vhost_hlen, 0); + if (likely(desc_chunck_len >= dev->vhost_hlen)) { + virtio_enqueue_offload(m, + (struct virtio_net_hdr *)(uintptr_t)desc_addr); + PRINT_PACKET(dev, (uintptr_t)desc_addr, dev->vhost_hlen, 0); + vhost_log_cache_write(dev, vq, desc_gaddr, dev->vhost_hlen); + } else { + struct virtio_net_hdr vnet_hdr; + uint64_t remain = dev->vhost_hlen; + uint64_t len; + uint64_t src = (uint64_t)(uintptr_t)&vnet_hdr, dst; + uint64_t guest_addr = desc_gaddr; + + virtio_enqueue_offload(m, &vnet_hdr); + + while (remain) { + len = remain; + dst = vhost_iova_to_vva(dev, vq, guest_addr, + &len, VHOST_ACCESS_RW); + if (unlikely(!dst || !len)) { + error = -1; + goto out; + } + + rte_memcpy((void *)(uintptr_t)dst, + (void *)(uintptr_t)src, len); + + PRINT_PACKET(dev, (uintptr_t)dst, (uint32_t)len, 0); + vhost_log_cache_write(dev, vq, guest_addr, len); + remain -= len; + guest_addr += len; + dst += len; + } + } - desc_offset = dev->vhost_hlen; desc_avail = desc->len - dev->vhost_hlen; + if (unlikely(desc_chunck_len < dev->vhost_hlen)) { + desc_chunck_len = desc_avail; + desc_gaddr = desc->addr + dev->vhost_hlen; + desc_addr = vhost_iova_to_vva(dev, + vq, desc_gaddr, + &desc_chunck_len, + VHOST_ACCESS_RW); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } + + desc_offset = 0; + } else { + desc_offset = dev->vhost_hlen; + desc_chunck_len -= dev->vhost_hlen; + } mbuf_avail = rte_pktmbuf_data_len(m); mbuf_offset = 0; @@ -257,8 +350,10 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, } desc = &descs[desc->next]; - desc_addr = vhost_iova_to_vva(dev, vq, desc->addr, - desc->len, + desc_chunck_len = desc->len; + desc_gaddr = desc->addr; + desc_addr = vhost_iova_to_vva(dev, vq, desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RW); if (unlikely(!desc_addr)) { error = -1; @@ -267,15 +362,27 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, desc_offset = 0; desc_avail = desc->len; + } else if (unlikely(desc_chunck_len == 0)) { + desc_chunck_len = desc_avail; + desc_gaddr += desc_offset; + desc_addr = vhost_iova_to_vva(dev, + vq, desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RW); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } + desc_offset = 0; } - cpy_len = RTE_MIN(desc_avail, mbuf_avail); + cpy_len = RTE_MIN(desc_chunck_len, mbuf_avail); if (likely(cpy_len > MAX_BATCH_LEN || copy_nb >= vq->size)) { rte_memcpy((void *)((uintptr_t)(desc_addr + desc_offset)), rte_pktmbuf_mtod_offset(m, void *, mbuf_offset), cpy_len); - vhost_log_write(dev, desc->addr + desc_offset, cpy_len); + vhost_log_cache_write(dev, vq, desc_gaddr + desc_offset, + cpy_len); PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), cpy_len, 0); } else { @@ -283,7 +390,7 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, (void *)((uintptr_t)(desc_addr + desc_offset)); batch_copy[copy_nb].src = rte_pktmbuf_mtod_offset(m, void *, mbuf_offset); - batch_copy[copy_nb].log_addr = desc->addr + desc_offset; + batch_copy[copy_nb].log_addr = desc_gaddr + desc_offset; batch_copy[copy_nb].len = cpy_len; copy_nb++; } @@ -292,6 +399,7 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, mbuf_offset += cpy_len; desc_avail -= cpy_len; desc_offset += cpy_len; + desc_chunck_len -= cpy_len; } out: @@ -326,8 +434,11 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, } vq = dev->virtqueue[queue_id]; + + rte_spinlock_lock(&vq->access_lock); + if (unlikely(vq->enabled == 0)) - return 0; + goto out_access_unlock; if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) vhost_user_iotlb_rd_lock(vq); @@ -360,27 +471,41 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, vq->used->ring[used_idx].id = desc_indexes[i]; vq->used->ring[used_idx].len = pkts[i]->pkt_len + dev->vhost_hlen; - vhost_log_used_vring(dev, vq, + vhost_log_cache_used_vring(dev, vq, offsetof(struct vring_used, ring[used_idx]), sizeof(vq->used->ring[used_idx])); } rte_prefetch0(&vq->desc[desc_indexes[0]]); for (i = 0; i < count; i++) { + struct vring_desc *idesc = NULL; uint16_t desc_idx = desc_indexes[i]; int err; if (vq->desc[desc_idx].flags & VRING_DESC_F_INDIRECT) { + uint64_t dlen = vq->desc[desc_idx].len; descs = (struct vring_desc *)(uintptr_t) vhost_iova_to_vva(dev, vq, vq->desc[desc_idx].addr, - vq->desc[desc_idx].len, - VHOST_ACCESS_RO); + &dlen, VHOST_ACCESS_RO); if (unlikely(!descs)) { count = i; break; } + if (unlikely(dlen < vq->desc[desc_idx].len)) { + /* + * The indirect desc table is not contiguous + * in process VA space, we have to copy it. + */ + idesc = alloc_copy_ind_table(dev, vq, + &vq->desc[desc_idx]); + if (unlikely(!idesc)) + break; + + descs = idesc; + } + desc_idx = 0; sz = vq->desc[desc_idx].len / sizeof(*descs); } else { @@ -391,17 +516,23 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, err = copy_mbuf_to_desc(dev, vq, descs, pkts[i], desc_idx, sz); if (unlikely(err)) { count = i; + free_ind_table(idesc); break; } if (i + 1 < count) rte_prefetch0(&vq->desc[desc_indexes[i+1]]); + + if (unlikely(!!idesc)) + free_ind_table(idesc); } do_data_copy_enqueue(dev, vq); rte_smp_wmb(); + vhost_log_cache_sync(dev, vq); + *(volatile uint16_t *)&vq->used->idx += count; vq->last_used_idx += count; vhost_log_used_vring(dev, vq, @@ -419,6 +550,9 @@ out: if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) vhost_user_iotlb_rd_unlock(vq); +out_access_unlock: + rte_spinlock_unlock(&vq->access_lock); + return count; } @@ -431,24 +565,41 @@ fill_vec_buf(struct virtio_net *dev, struct vhost_virtqueue *vq, uint16_t idx = vq->avail->ring[avail_idx & (vq->size - 1)]; uint32_t vec_id = *vec_idx; uint32_t len = 0; + uint64_t dlen; struct vring_desc *descs = vq->desc; + struct vring_desc *idesc = NULL; *desc_chain_head = idx; if (vq->desc[idx].flags & VRING_DESC_F_INDIRECT) { + dlen = vq->desc[idx].len; descs = (struct vring_desc *)(uintptr_t) vhost_iova_to_vva(dev, vq, vq->desc[idx].addr, - vq->desc[idx].len, + &dlen, VHOST_ACCESS_RO); if (unlikely(!descs)) return -1; + if (unlikely(dlen < vq->desc[idx].len)) { + /* + * The indirect desc table is not contiguous + * in process VA space, we have to copy it. + */ + idesc = alloc_copy_ind_table(dev, vq, &vq->desc[idx]); + if (unlikely(!idesc)) + return -1; + + descs = idesc; + } + idx = 0; } while (1) { - if (unlikely(vec_id >= BUF_VECTOR_MAX || idx >= vq->size)) + if (unlikely(vec_id >= BUF_VECTOR_MAX || idx >= vq->size)) { + free_ind_table(idesc); return -1; + } len += descs[idx].len; buf_vec[vec_id].buf_addr = descs[idx].addr; @@ -465,6 +616,9 @@ fill_vec_buf(struct virtio_net *dev, struct vhost_virtqueue *vq, *desc_chain_len = len; *vec_idx = vec_id; + if (unlikely(!!idesc)) + free_ind_table(idesc); + return 0; } @@ -519,13 +673,15 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, uint16_t num_buffers) { uint32_t vec_idx = 0; - uint64_t desc_addr; + uint64_t desc_addr, desc_gaddr; uint32_t mbuf_offset, mbuf_avail; uint32_t desc_offset, desc_avail; uint32_t cpy_len; + uint64_t desc_chunck_len; uint64_t hdr_addr, hdr_phys_addr; struct rte_mbuf *hdr_mbuf; struct batch_copy_elem *batch_copy = vq->batch_copy_elems; + struct virtio_net_hdr_mrg_rxbuf tmp_hdr, *hdr = NULL; uint16_t copy_nb = vq->batch_copy_nb_elems; int error = 0; @@ -534,9 +690,12 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, goto out; } - desc_addr = vhost_iova_to_vva(dev, vq, buf_vec[vec_idx].buf_addr, - buf_vec[vec_idx].buf_len, - VHOST_ACCESS_RW); + desc_chunck_len = buf_vec[vec_idx].buf_len; + desc_gaddr = buf_vec[vec_idx].buf_addr; + desc_addr = vhost_iova_to_vva(dev, vq, + desc_gaddr, + &desc_chunck_len, + VHOST_ACCESS_RW); if (buf_vec[vec_idx].buf_len < dev->vhost_hlen || !desc_addr) { error = -1; goto out; @@ -544,14 +703,35 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, hdr_mbuf = m; hdr_addr = desc_addr; - hdr_phys_addr = buf_vec[vec_idx].buf_addr; + if (unlikely(desc_chunck_len < dev->vhost_hlen)) + hdr = &tmp_hdr; + else + hdr = (struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)hdr_addr; + hdr_phys_addr = desc_gaddr; rte_prefetch0((void *)(uintptr_t)hdr_addr); LOG_DEBUG(VHOST_DATA, "(%d) RX: num merge buffers %d\n", dev->vid, num_buffers); desc_avail = buf_vec[vec_idx].buf_len - dev->vhost_hlen; - desc_offset = dev->vhost_hlen; + if (unlikely(desc_chunck_len < dev->vhost_hlen)) { + desc_chunck_len = desc_avail; + desc_gaddr += dev->vhost_hlen; + desc_addr = vhost_iova_to_vva(dev, vq, + desc_gaddr, + &desc_chunck_len, + VHOST_ACCESS_RW); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } + + desc_offset = 0; + } else { + desc_offset = dev->vhost_hlen; + desc_chunck_len -= dev->vhost_hlen; + } + mbuf_avail = rte_pktmbuf_data_len(m); mbuf_offset = 0; @@ -559,10 +739,12 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, /* done with current desc buf, get the next one */ if (desc_avail == 0) { vec_idx++; + desc_chunck_len = buf_vec[vec_idx].buf_len; + desc_gaddr = buf_vec[vec_idx].buf_addr; desc_addr = vhost_iova_to_vva(dev, vq, - buf_vec[vec_idx].buf_addr, - buf_vec[vec_idx].buf_len, + desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RW); if (unlikely(!desc_addr)) { error = -1; @@ -573,6 +755,17 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, rte_prefetch0((void *)(uintptr_t)desc_addr); desc_offset = 0; desc_avail = buf_vec[vec_idx].buf_len; + } else if (unlikely(desc_chunck_len == 0)) { + desc_chunck_len = desc_avail; + desc_gaddr += desc_offset; + desc_addr = vhost_iova_to_vva(dev, vq, + desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RW); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } + desc_offset = 0; } /* done with current mbuf, get the next one */ @@ -584,30 +777,57 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, } if (hdr_addr) { - struct virtio_net_hdr_mrg_rxbuf *hdr; - - hdr = (struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t) - hdr_addr; virtio_enqueue_offload(hdr_mbuf, &hdr->hdr); ASSIGN_UNLESS_EQUAL(hdr->num_buffers, num_buffers); - vhost_log_write(dev, hdr_phys_addr, dev->vhost_hlen); - PRINT_PACKET(dev, (uintptr_t)hdr_addr, - dev->vhost_hlen, 0); + if (unlikely(hdr == &tmp_hdr)) { + uint64_t len; + uint64_t remain = dev->vhost_hlen; + uint64_t src = (uint64_t)(uintptr_t)hdr, dst; + uint64_t guest_addr = hdr_phys_addr; + + while (remain) { + len = remain; + dst = vhost_iova_to_vva(dev, vq, + guest_addr, &len, + VHOST_ACCESS_RW); + if (unlikely(!dst || !len)) { + error = -1; + goto out; + } + + rte_memcpy((void *)(uintptr_t)dst, + (void *)(uintptr_t)src, + len); + + PRINT_PACKET(dev, (uintptr_t)dst, + (uint32_t)len, 0); + vhost_log_cache_write(dev, vq, + guest_addr, len); + + remain -= len; + guest_addr += len; + dst += len; + } + } else { + PRINT_PACKET(dev, (uintptr_t)hdr_addr, + dev->vhost_hlen, 0); + vhost_log_cache_write(dev, vq, hdr_phys_addr, + dev->vhost_hlen); + } hdr_addr = 0; } - cpy_len = RTE_MIN(desc_avail, mbuf_avail); + cpy_len = RTE_MIN(desc_chunck_len, mbuf_avail); if (likely(cpy_len > MAX_BATCH_LEN || copy_nb >= vq->size)) { rte_memcpy((void *)((uintptr_t)(desc_addr + desc_offset)), rte_pktmbuf_mtod_offset(m, void *, mbuf_offset), cpy_len); - vhost_log_write(dev, - buf_vec[vec_idx].buf_addr + desc_offset, - cpy_len); + vhost_log_cache_write(dev, vq, desc_gaddr + desc_offset, + cpy_len); PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), cpy_len, 0); } else { @@ -615,8 +835,7 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, (void *)((uintptr_t)(desc_addr + desc_offset)); batch_copy[copy_nb].src = rte_pktmbuf_mtod_offset(m, void *, mbuf_offset); - batch_copy[copy_nb].log_addr = - buf_vec[vec_idx].buf_addr + desc_offset; + batch_copy[copy_nb].log_addr = desc_gaddr + desc_offset; batch_copy[copy_nb].len = cpy_len; copy_nb++; } @@ -625,6 +844,7 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, mbuf_offset += cpy_len; desc_avail -= cpy_len; desc_offset += cpy_len; + desc_chunck_len -= cpy_len; } out: @@ -651,8 +871,11 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, } vq = dev->virtqueue[queue_id]; + + rte_spinlock_lock(&vq->access_lock); + if (unlikely(vq->enabled == 0)) - return 0; + goto out_access_unlock; if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) vhost_user_iotlb_rd_lock(vq); @@ -715,6 +938,9 @@ out: if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) vhost_user_iotlb_rd_unlock(vq); +out_access_unlock: + rte_spinlock_unlock(&vq->access_lock); + return pkt_idx; } @@ -894,11 +1120,13 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, struct rte_mempool *mbuf_pool) { struct vring_desc *desc; - uint64_t desc_addr; + uint64_t desc_addr, desc_gaddr; uint32_t desc_avail, desc_offset; uint32_t mbuf_avail, mbuf_offset; uint32_t cpy_len; + uint64_t desc_chunck_len; struct rte_mbuf *cur = m, *prev = m; + struct virtio_net_hdr tmp_hdr; struct virtio_net_hdr *hdr = NULL; /* A counter to avoid desc dead loop chain */ uint32_t nr_desc = 1; @@ -913,9 +1141,11 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, goto out; } + desc_chunck_len = desc->len; + desc_gaddr = desc->addr; desc_addr = vhost_iova_to_vva(dev, - vq, desc->addr, - desc->len, + vq, desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RO); if (unlikely(!desc_addr)) { error = -1; @@ -923,8 +1153,40 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, } if (virtio_net_with_host_offload(dev)) { - hdr = (struct virtio_net_hdr *)((uintptr_t)desc_addr); - rte_prefetch0(hdr); + if (unlikely(desc_chunck_len < sizeof(struct virtio_net_hdr))) { + uint64_t len = desc_chunck_len; + uint64_t remain = sizeof(struct virtio_net_hdr); + uint64_t src = desc_addr; + uint64_t dst = (uint64_t)(uintptr_t)&tmp_hdr; + uint64_t guest_addr = desc_gaddr; + + /* + * No luck, the virtio-net header doesn't fit + * in a contiguous virtual area. + */ + while (remain) { + len = remain; + src = vhost_iova_to_vva(dev, vq, + guest_addr, &len, + VHOST_ACCESS_RO); + if (unlikely(!src || !len)) { + error = -1; + goto out; + } + + rte_memcpy((void *)(uintptr_t)dst, + (void *)(uintptr_t)src, len); + + guest_addr += len; + remain -= len; + dst += len; + } + + hdr = &tmp_hdr; + } else { + hdr = (struct virtio_net_hdr *)((uintptr_t)desc_addr); + rte_prefetch0(hdr); + } } /* @@ -940,9 +1202,11 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, goto out; } + desc_chunck_len = desc->len; + desc_gaddr = desc->addr; desc_addr = vhost_iova_to_vva(dev, - vq, desc->addr, - desc->len, + vq, desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RO); if (unlikely(!desc_addr)) { error = -1; @@ -954,19 +1218,37 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, nr_desc += 1; } else { desc_avail = desc->len - dev->vhost_hlen; - desc_offset = dev->vhost_hlen; + + if (unlikely(desc_chunck_len < dev->vhost_hlen)) { + desc_chunck_len = desc_avail; + desc_gaddr += dev->vhost_hlen; + desc_addr = vhost_iova_to_vva(dev, + vq, desc_gaddr, + &desc_chunck_len, + VHOST_ACCESS_RO); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } + + desc_offset = 0; + } else { + desc_offset = dev->vhost_hlen; + desc_chunck_len -= dev->vhost_hlen; + } } rte_prefetch0((void *)(uintptr_t)(desc_addr + desc_offset)); - PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), desc_avail, 0); + PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), + (uint32_t)desc_chunck_len, 0); mbuf_offset = 0; mbuf_avail = m->buf_len - RTE_PKTMBUF_HEADROOM; while (1) { uint64_t hpa; - cpy_len = RTE_MIN(desc_avail, mbuf_avail); + cpy_len = RTE_MIN(desc_chunck_len, mbuf_avail); /* * A desc buf might across two host physical pages that are @@ -974,10 +1256,11 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, * will be copied even though zero copy is enabled. */ if (unlikely(dev->dequeue_zero_copy && (hpa = gpa_to_hpa(dev, - desc->addr + desc_offset, cpy_len)))) { + desc_gaddr + desc_offset, cpy_len)))) { cur->data_len = cpy_len; cur->data_off = 0; - cur->buf_addr = (void *)(uintptr_t)desc_addr; + cur->buf_addr = (void *)(uintptr_t)(desc_addr + + desc_offset); cur->buf_iova = hpa; /* @@ -988,7 +1271,8 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, } else { if (likely(cpy_len > MAX_BATCH_LEN || copy_nb >= vq->size || - (hdr && cur == m))) { + (hdr && cur == m) || + desc->len != desc_chunck_len)) { rte_memcpy(rte_pktmbuf_mtod_offset(cur, void *, mbuf_offset), (void *)((uintptr_t)(desc_addr + @@ -1009,6 +1293,7 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, mbuf_avail -= cpy_len; mbuf_offset += cpy_len; desc_avail -= cpy_len; + desc_chunck_len -= cpy_len; desc_offset += cpy_len; /* This desc reaches to its end, get the next one */ @@ -1027,9 +1312,11 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, goto out; } + desc_chunck_len = desc->len; + desc_gaddr = desc->addr; desc_addr = vhost_iova_to_vva(dev, - vq, desc->addr, - desc->len, + vq, desc_gaddr, + &desc_chunck_len, VHOST_ACCESS_RO); if (unlikely(!desc_addr)) { error = -1; @@ -1041,7 +1328,23 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, desc_offset = 0; desc_avail = desc->len; - PRINT_PACKET(dev, (uintptr_t)desc_addr, desc->len, 0); + PRINT_PACKET(dev, (uintptr_t)desc_addr, + (uint32_t)desc_chunck_len, 0); + } else if (unlikely(desc_chunck_len == 0)) { + desc_chunck_len = desc_avail; + desc_gaddr += desc_offset; + desc_addr = vhost_iova_to_vva(dev, vq, + desc_gaddr, + &desc_chunck_len, + VHOST_ACCESS_RO); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } + desc_offset = 0; + + PRINT_PACKET(dev, (uintptr_t)desc_addr, + (uint32_t)desc_chunck_len, 0); } /* @@ -1088,7 +1391,7 @@ update_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq, { vq->used->ring[used_idx].id = desc_idx; vq->used->ring[used_idx].len = 0; - vhost_log_used_vring(dev, vq, + vhost_log_cache_used_vring(dev, vq, offsetof(struct vring_used, ring[used_idx]), sizeof(vq->used->ring[used_idx])); } @@ -1103,6 +1406,8 @@ update_used_idx(struct virtio_net *dev, struct vhost_virtqueue *vq, rte_smp_wmb(); rte_smp_rmb(); + vhost_log_cache_sync(dev, vq); + vq->used->idx += count; vhost_log_used_vring(dev, vq, offsetof(struct vring_used, idx), sizeof(vq->used->idx)); @@ -1156,6 +1461,22 @@ mbuf_is_consumed(struct rte_mbuf *m) return true; } +static __rte_always_inline void +restore_mbuf(struct rte_mbuf *m) +{ + uint32_t mbuf_size, priv_size; + + while (m) { + priv_size = rte_pktmbuf_priv_size(m->pool); + mbuf_size = sizeof(struct rte_mbuf) + priv_size; + /* start of buffer is after mbuf structure and priv data */ + + m->buf_addr = (char *)m + mbuf_size; + m->buf_iova = rte_mempool_virt2iova(m) + mbuf_size; + m = m->next; + } +} + uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id, struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count) @@ -1180,9 +1501,13 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, } vq = dev->virtqueue[queue_id]; - if (unlikely(vq->enabled == 0)) + + if (unlikely(rte_spinlock_trylock(&vq->access_lock) == 0)) return 0; + if (unlikely(vq->enabled == 0)) + goto out_access_unlock; + vq->batch_copy_nb_elems = 0; if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) @@ -1207,6 +1532,7 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, nr_updated += 1; TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next); + restore_mbuf(zmbuf->mbuf); rte_pktmbuf_free(zmbuf->mbuf); put_zmbuf(zmbuf); vq->nr_zmbuf -= 1; @@ -1240,7 +1566,7 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, if (rarp_mbuf == NULL) { RTE_LOG(ERR, VHOST_DATA, "Failed to allocate memory for mbuf.\n"); - return 0; + goto out; } if (make_rarp_packet(rarp_mbuf, &dev->mac)) { @@ -1282,22 +1608,37 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, /* Prefetch descriptor index. */ rte_prefetch0(&vq->desc[desc_indexes[0]]); for (i = 0; i < count; i++) { - struct vring_desc *desc; + struct vring_desc *desc, *idesc = NULL; uint16_t sz, idx; + uint64_t dlen; int err; if (likely(i + 1 < count)) rte_prefetch0(&vq->desc[desc_indexes[i + 1]]); if (vq->desc[desc_indexes[i]].flags & VRING_DESC_F_INDIRECT) { + dlen = vq->desc[desc_indexes[i]].len; desc = (struct vring_desc *)(uintptr_t) vhost_iova_to_vva(dev, vq, vq->desc[desc_indexes[i]].addr, - sizeof(*desc), + &dlen, VHOST_ACCESS_RO); if (unlikely(!desc)) break; + if (unlikely(dlen < vq->desc[desc_indexes[i]].len)) { + /* + * The indirect desc table is not contiguous + * in process VA space, we have to copy it. + */ + idesc = alloc_copy_ind_table(dev, vq, + &vq->desc[desc_indexes[i]]); + if (unlikely(!idesc)) + break; + + desc = idesc; + } + rte_prefetch0(desc); sz = vq->desc[desc_indexes[i]].len / sizeof(*desc); idx = 0; @@ -1311,6 +1652,7 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, if (unlikely(pkts[i] == NULL)) { RTE_LOG(ERR, VHOST_DATA, "Failed to allocate memory for mbuf.\n"); + free_ind_table(idesc); break; } @@ -1318,6 +1660,7 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, mbuf_pool); if (unlikely(err)) { rte_pktmbuf_free(pkts[i]); + free_ind_table(idesc); break; } @@ -1327,6 +1670,7 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, zmbuf = get_zmbuf(vq); if (!zmbuf) { rte_pktmbuf_free(pkts[i]); + free_ind_table(idesc); break; } zmbuf->mbuf = pkts[i]; @@ -1343,6 +1687,9 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, vq->nr_zmbuf += 1; TAILQ_INSERT_TAIL(&vq->zmbuf_list, zmbuf, next); } + + if (unlikely(!!idesc)) + free_ind_table(idesc); } vq->last_avail_idx += i; @@ -1356,6 +1703,9 @@ out: if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) vhost_user_iotlb_rd_unlock(vq); +out_access_unlock: + rte_spinlock_unlock(&vq->access_lock); + if (unlikely(rarp_mbuf != NULL)) { /* * Inject it to the head of "pkts" array, so that switch's mac