X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=lib%2Flibrte_vhost%2Fvirtio_net.c;h=d347030743b52140b35a2293480e08c9bf7c1b6b;hb=a64e51f12b29cdd440d015bd9765fe2cf2e9f1b0;hp=ea027f1405777347ab2fb7280a4c7dc3abf39415;hpb=9365d6cfd641d5ade83591c5f5dfa2bf32808e4e;p=deb_dpdk.git diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index ea027f14..d3470307 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -39,59 +39,27 @@ #include #include #include -#include +#include #include #include #include #include +#include +#include "iotlb.h" #include "vhost.h" #define MAX_PKT_BURST 32 -#define VHOST_LOG_PAGE 4096 -static inline void __attribute__((always_inline)) -vhost_log_page(uint8_t *log_base, uint64_t page) -{ - log_base[page / 8] |= 1 << (page % 8); -} - -static inline void __attribute__((always_inline)) -vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len) -{ - uint64_t page; - - if (likely(((dev->features & (1ULL << VHOST_F_LOG_ALL)) == 0) || - !dev->log_base || !len)) - return; - - if (unlikely(dev->log_size <= ((addr + len - 1) / VHOST_LOG_PAGE / 8))) - return; - - /* To make sure guest memory updates are committed before logging */ - rte_smp_wmb(); - - page = addr / VHOST_LOG_PAGE; - while (page * VHOST_LOG_PAGE < addr + len) { - vhost_log_page((uint8_t *)(uintptr_t)dev->log_base, page); - page += 1; - } -} - -static inline void __attribute__((always_inline)) -vhost_log_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq, - uint64_t offset, uint64_t len) -{ - vhost_log_write(dev, vq->log_guest_addr + offset, len); -} +#define MAX_BATCH_LEN 256 static bool -is_valid_virt_queue_idx(uint32_t idx, int is_tx, uint32_t qp_nb) +is_valid_virt_queue_idx(uint32_t idx, int is_tx, uint32_t nr_vring) { - return (is_tx ^ (idx & 1)) == 0 && idx < qp_nb * VIRTIO_QNUM; + return (is_tx ^ (idx & 1)) == 0 && idx < nr_vring; } -static inline void __attribute__((always_inline)) +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) { @@ -103,7 +71,7 @@ do_flush_shadow_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq, size * sizeof(struct vring_used_elem)); } -static inline void __attribute__((always_inline)) +static __rte_always_inline void flush_shadow_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq) { uint16_t used_idx = vq->last_used_idx & (vq->size - 1); @@ -131,7 +99,7 @@ flush_shadow_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq) sizeof(vq->used->idx)); } -static inline void __attribute__((always_inline)) +static __rte_always_inline void update_shadow_used_ring(struct vhost_virtqueue *vq, uint16_t desc_idx, uint16_t len) { @@ -141,14 +109,50 @@ update_shadow_used_ring(struct vhost_virtqueue *vq, vq->shadow_used_ring[i].len = len; } +static inline void +do_data_copy_enqueue(struct virtio_net *dev, struct vhost_virtqueue *vq) +{ + struct batch_copy_elem *elem = vq->batch_copy_elems; + uint16_t count = vq->batch_copy_nb_elems; + int i; + + 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); + PRINT_PACKET(dev, (uintptr_t)elem[i].dst, elem[i].len, 0); + } +} + +static inline void +do_data_copy_dequeue(struct vhost_virtqueue *vq) +{ + struct batch_copy_elem *elem = vq->batch_copy_elems; + uint16_t count = vq->batch_copy_nb_elems; + int i; + + for (i = 0; i < count; i++) + rte_memcpy(elem[i].dst, elem[i].src, elem[i].len); +} + +/* avoid write operation when necessary, to lessen cache issues */ +#define ASSIGN_UNLESS_EQUAL(var, val) do { \ + if ((var) != (val)) \ + (var) = (val); \ +} while (0) + static void virtio_enqueue_offload(struct rte_mbuf *m_buf, struct virtio_net_hdr *net_hdr) { - if (m_buf->ol_flags & PKT_TX_L4_MASK) { + uint64_t csum_l4 = m_buf->ol_flags & PKT_TX_L4_MASK; + + if (m_buf->ol_flags & PKT_TX_TCP_SEG) + csum_l4 |= PKT_TX_TCP_CKSUM; + + if (csum_l4) { net_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; net_hdr->csum_start = m_buf->l2_len + m_buf->l3_len; - switch (m_buf->ol_flags & PKT_TX_L4_MASK) { + switch (csum_l4) { case PKT_TX_TCP_CKSUM: net_hdr->csum_offset = (offsetof(struct tcp_hdr, cksum)); @@ -162,6 +166,19 @@ virtio_enqueue_offload(struct rte_mbuf *m_buf, struct virtio_net_hdr *net_hdr) cksum)); break; } + } else { + ASSIGN_UNLESS_EQUAL(net_hdr->csum_start, 0); + ASSIGN_UNLESS_EQUAL(net_hdr->csum_offset, 0); + ASSIGN_UNLESS_EQUAL(net_hdr->flags, 0); + } + + /* IP cksum verification cannot be bypassed, then calculate here */ + if (m_buf->ol_flags & PKT_TX_IP_CKSUM) { + struct ipv4_hdr *ipv4_hdr; + + ipv4_hdr = rte_pktmbuf_mtod_offset(m_buf, struct ipv4_hdr *, + m_buf->l2_len); + ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr); } if (m_buf->ol_flags & PKT_TX_TCP_SEG) { @@ -172,46 +189,45 @@ virtio_enqueue_offload(struct rte_mbuf *m_buf, struct virtio_net_hdr *net_hdr) net_hdr->gso_size = m_buf->tso_segsz; net_hdr->hdr_len = m_buf->l2_len + m_buf->l3_len + m_buf->l4_len; + } else { + ASSIGN_UNLESS_EQUAL(net_hdr->gso_type, 0); + ASSIGN_UNLESS_EQUAL(net_hdr->gso_size, 0); + ASSIGN_UNLESS_EQUAL(net_hdr->hdr_len, 0); } } -static inline void -copy_virtio_net_hdr(struct virtio_net *dev, uint64_t desc_addr, - struct virtio_net_hdr_mrg_rxbuf hdr) -{ - if (dev->vhost_hlen == sizeof(struct virtio_net_hdr_mrg_rxbuf)) - *(struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)desc_addr = hdr; - else - *(struct virtio_net_hdr *)(uintptr_t)desc_addr = hdr.hdr; -} - -static inline int __attribute__((always_inline)) -copy_mbuf_to_desc(struct virtio_net *dev, struct vring_desc *descs, - struct rte_mbuf *m, uint16_t desc_idx, uint32_t size) +static __rte_always_inline int +copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, + struct vring_desc *descs, struct rte_mbuf *m, + uint16_t desc_idx, uint32_t size) { uint32_t desc_avail, desc_offset; uint32_t mbuf_avail, mbuf_offset; uint32_t cpy_len; struct vring_desc *desc; uint64_t desc_addr; - struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, 0, 0, 0, 0, 0}, 0}; /* A counter to avoid desc dead loop chain */ uint16_t nr_desc = 1; + struct batch_copy_elem *batch_copy = vq->batch_copy_elems; + uint16_t copy_nb = vq->batch_copy_nb_elems; + int error = 0; desc = &descs[desc_idx]; - desc_addr = gpa_to_vva(dev, desc->addr); + desc_addr = vhost_iova_to_vva(dev, vq, desc->addr, + desc->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 * otherwise stores offset on the stack instead of in a register. */ - if (unlikely(desc->len < dev->vhost_hlen) || !desc_addr) - return -1; + if (unlikely(desc->len < dev->vhost_hlen) || !desc_addr) { + error = -1; + goto out; + } rte_prefetch0((void *)(uintptr_t)desc_addr); - virtio_enqueue_offload(m, &virtio_hdr.hdr); - copy_virtio_net_hdr(dev, desc_addr, virtio_hdr); + 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); @@ -233,27 +249,45 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vring_desc *descs, if (desc_avail == 0) { if ((desc->flags & VRING_DESC_F_NEXT) == 0) { /* Room in vring buffer is not enough */ - return -1; + error = -1; + goto out; + } + if (unlikely(desc->next >= size || ++nr_desc > size)) { + error = -1; + goto out; } - if (unlikely(desc->next >= size || ++nr_desc > size)) - return -1; desc = &descs[desc->next]; - desc_addr = gpa_to_vva(dev, desc->addr); - if (unlikely(!desc_addr)) - return -1; + desc_addr = vhost_iova_to_vva(dev, vq, desc->addr, + desc->len, + VHOST_ACCESS_RW); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } desc_offset = 0; desc_avail = desc->len; } cpy_len = RTE_MIN(desc_avail, mbuf_avail); - 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); - PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), - cpy_len, 0); + 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); + PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), + cpy_len, 0); + } else { + batch_copy[copy_nb].dst = + (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].len = cpy_len; + copy_nb++; + } mbuf_avail -= cpy_len; mbuf_offset += cpy_len; @@ -261,17 +295,20 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vring_desc *descs, desc_offset += cpy_len; } - return 0; +out: + vq->batch_copy_nb_elems = copy_nb; + + return error; } /** * 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 are succesfully + * count is returned to indicate the number of packets that are successfully * added to the RX queue. This function works when the mbuf is scattered, but * it doesn't support the mergeable feature. */ -static inline uint32_t __attribute__((always_inline)) +static __rte_always_inline uint32_t virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, struct rte_mbuf **pkts, uint32_t count) { @@ -283,15 +320,28 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, uint32_t i, sz; LOG_DEBUG(VHOST_DATA, "(%d) %s\n", dev->vid, __func__); - if (unlikely(!is_valid_virt_queue_idx(queue_id, 0, dev->virt_qp_nb))) { + if (unlikely(!is_valid_virt_queue_idx(queue_id, 0, dev->nr_vring))) { RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n", dev->vid, __func__, queue_id); return 0; } 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); + + if (unlikely(vq->access_ok == 0)) { + if (unlikely(vring_translate(dev, vq) < 0)) { + count = 0; + goto out; + } + } avail_idx = *((volatile uint16_t *)&vq->avail->idx); start_idx = vq->last_used_idx; @@ -299,11 +349,13 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, count = RTE_MIN(count, free_entries); count = RTE_MIN(count, (uint32_t)MAX_PKT_BURST); if (count == 0) - return 0; + goto out; LOG_DEBUG(VHOST_DATA, "(%d) start_idx %d | end_idx %d\n", dev->vid, start_idx, start_idx + count); + vq->batch_copy_nb_elems = 0; + /* Retrieve all of the desc indexes first to avoid caching issues. */ rte_prefetch0(&vq->avail->ring[start_idx & (vq->size - 1)]); for (i = 0; i < count; i++) { @@ -323,8 +375,11 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, int err; if (vq->desc[desc_idx].flags & VRING_DESC_F_INDIRECT) { - descs = (struct vring_desc *)(uintptr_t)gpa_to_vva(dev, - vq->desc[desc_idx].addr); + 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); if (unlikely(!descs)) { count = i; break; @@ -337,19 +392,18 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, sz = vq->size; } - err = copy_mbuf_to_desc(dev, descs, pkts[i], desc_idx, sz); + err = copy_mbuf_to_desc(dev, vq, descs, pkts[i], desc_idx, sz); if (unlikely(err)) { - used_idx = (start_idx + i) & (vq->size - 1); - vq->used->ring[used_idx].len = dev->vhost_hlen; - vhost_log_used_vring(dev, vq, - offsetof(struct vring_used, ring[used_idx]), - sizeof(vq->used->ring[used_idx])); + count = i; + break; } if (i + 1 < count) rte_prefetch0(&vq->desc[desc_indexes[i+1]]); } + do_data_copy_enqueue(dev, vq); + rte_smp_wmb(); *(volatile uint16_t *)&vq->used->idx += count; @@ -365,10 +419,17 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT) && (vq->callfd >= 0)) eventfd_write(vq->callfd, (eventfd_t)1); +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; } -static inline int __attribute__((always_inline)) +static __rte_always_inline int fill_vec_buf(struct virtio_net *dev, struct vhost_virtqueue *vq, uint32_t avail_idx, uint32_t *vec_idx, struct buf_vector *buf_vec, uint16_t *desc_chain_head, @@ -383,7 +444,9 @@ fill_vec_buf(struct virtio_net *dev, struct vhost_virtqueue *vq, if (vq->desc[idx].flags & VRING_DESC_F_INDIRECT) { descs = (struct vring_desc *)(uintptr_t) - gpa_to_vva(dev, vq->desc[idx].addr); + vhost_iova_to_vva(dev, vq, vq->desc[idx].addr, + vq->desc[idx].len, + VHOST_ACCESS_RO); if (unlikely(!descs)) return -1; @@ -457,11 +520,11 @@ reserve_avail_buf_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, return 0; } -static inline int __attribute__((always_inline)) -copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, - struct buf_vector *buf_vec, uint16_t num_buffers) +static __rte_always_inline int +copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct vhost_virtqueue *vq, + struct rte_mbuf *m, struct buf_vector *buf_vec, + uint16_t num_buffers) { - struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, 0, 0, 0, 0, 0}, 0}; uint32_t vec_idx = 0; uint64_t desc_addr; uint32_t mbuf_offset, mbuf_avail; @@ -469,20 +532,28 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, uint32_t cpy_len; uint64_t hdr_addr, hdr_phys_addr; struct rte_mbuf *hdr_mbuf; + struct batch_copy_elem *batch_copy = vq->batch_copy_elems; + uint16_t copy_nb = vq->batch_copy_nb_elems; + int error = 0; - if (unlikely(m == NULL)) - return -1; + if (unlikely(m == NULL)) { + error = -1; + goto out; + } - desc_addr = gpa_to_vva(dev, buf_vec[vec_idx].buf_addr); - if (buf_vec[vec_idx].buf_len < dev->vhost_hlen || !desc_addr) - return -1; + desc_addr = vhost_iova_to_vva(dev, vq, buf_vec[vec_idx].buf_addr, + buf_vec[vec_idx].buf_len, + VHOST_ACCESS_RW); + if (buf_vec[vec_idx].buf_len < dev->vhost_hlen || !desc_addr) { + error = -1; + goto out; + } hdr_mbuf = m; hdr_addr = desc_addr; hdr_phys_addr = buf_vec[vec_idx].buf_addr; rte_prefetch0((void *)(uintptr_t)hdr_addr); - virtio_hdr.num_buffers = num_buffers; LOG_DEBUG(VHOST_DATA, "(%d) RX: num merge buffers %d\n", dev->vid, num_buffers); @@ -495,9 +566,15 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, /* done with current desc buf, get the next one */ if (desc_avail == 0) { vec_idx++; - desc_addr = gpa_to_vva(dev, buf_vec[vec_idx].buf_addr); - if (unlikely(!desc_addr)) - return -1; + desc_addr = + vhost_iova_to_vva(dev, vq, + buf_vec[vec_idx].buf_addr, + buf_vec[vec_idx].buf_len, + VHOST_ACCESS_RW); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } /* Prefetch buffer address. */ rte_prefetch0((void *)(uintptr_t)desc_addr); @@ -514,8 +591,13 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, } if (hdr_addr) { - virtio_enqueue_offload(hdr_mbuf, &virtio_hdr.hdr); - copy_virtio_net_hdr(dev, hdr_addr, virtio_hdr); + 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); @@ -524,13 +606,27 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, } cpy_len = RTE_MIN(desc_avail, mbuf_avail); - 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); - PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), - cpy_len, 0); + + 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); + PRINT_PACKET(dev, (uintptr_t)(desc_addr + desc_offset), + cpy_len, 0); + } else { + batch_copy[copy_nb].dst = + (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].len = cpy_len; + copy_nb++; + } mbuf_avail -= cpy_len; mbuf_offset += cpy_len; @@ -538,10 +634,13 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, desc_offset += cpy_len; } - return 0; +out: + vq->batch_copy_nb_elems = copy_nb; + + return error; } -static inline uint32_t __attribute__((always_inline)) +static __rte_always_inline uint32_t virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, struct rte_mbuf **pkts, uint32_t count) { @@ -552,19 +651,31 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, uint16_t avail_head; LOG_DEBUG(VHOST_DATA, "(%d) %s\n", dev->vid, __func__); - if (unlikely(!is_valid_virt_queue_idx(queue_id, 0, dev->virt_qp_nb))) { + if (unlikely(!is_valid_virt_queue_idx(queue_id, 0, dev->nr_vring))) { RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n", dev->vid, __func__, queue_id); return 0; } 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); + + if (unlikely(vq->access_ok == 0)) + if (unlikely(vring_translate(dev, vq) < 0)) + goto out; count = RTE_MIN((uint32_t)MAX_PKT_BURST, count); if (count == 0) - return 0; + goto out; + + vq->batch_copy_nb_elems = 0; rte_prefetch0(&vq->avail->ring[vq->last_avail_idx & (vq->size - 1)]); @@ -587,7 +698,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, dev->vid, vq->last_avail_idx, vq->last_avail_idx + num_buffers); - if (copy_mbuf_to_desc_mergeable(dev, pkts[pkt_idx], + if (copy_mbuf_to_desc_mergeable(dev, vq, pkts[pkt_idx], buf_vec, num_buffers) < 0) { vq->shadow_used_idx -= num_buffers; break; @@ -596,6 +707,8 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, vq->last_avail_idx += num_buffers; } + do_data_copy_enqueue(dev, vq); + if (likely(vq->shadow_used_idx)) { flush_shadow_used_ring(dev, vq); @@ -608,6 +721,13 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, eventfd_write(vq->callfd, (eventfd_t)1); } +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; } @@ -630,9 +750,11 @@ static inline bool virtio_net_with_host_offload(struct virtio_net *dev) { if (dev->features & - (VIRTIO_NET_F_CSUM | VIRTIO_NET_F_HOST_ECN | - VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | - VIRTIO_NET_F_HOST_UFO)) + ((1ULL << VIRTIO_NET_F_CSUM) | + (1ULL << VIRTIO_NET_F_HOST_ECN) | + (1ULL << VIRTIO_NET_F_HOST_TSO4) | + (1ULL << VIRTIO_NET_F_HOST_TSO6) | + (1ULL << VIRTIO_NET_F_HOST_UFO))) return true; return false; @@ -663,14 +785,14 @@ parse_ethernet(struct rte_mbuf *m, uint16_t *l4_proto, void **l4_hdr) switch (ethertype) { case ETHER_TYPE_IPv4: - ipv4_hdr = (struct ipv4_hdr *)l3_hdr; + ipv4_hdr = l3_hdr; *l4_proto = ipv4_hdr->next_proto_id; m->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4; *l4_hdr = (char *)l3_hdr + m->l3_len; m->ol_flags |= PKT_TX_IPV4; break; case ETHER_TYPE_IPv6: - ipv6_hdr = (struct ipv6_hdr *)l3_hdr; + ipv6_hdr = l3_hdr; *l4_proto = ipv6_hdr->proto; m->l3_len = sizeof(struct ipv6_hdr); *l4_hdr = (char *)l3_hdr + m->l3_len; @@ -684,7 +806,7 @@ parse_ethernet(struct rte_mbuf *m, uint16_t *l4_proto, void **l4_hdr) } } -static inline void __attribute__((always_inline)) +static __rte_always_inline void vhost_dequeue_offload(struct virtio_net_hdr *hdr, struct rte_mbuf *m) { uint16_t l4_proto = 0; @@ -720,7 +842,7 @@ vhost_dequeue_offload(struct virtio_net_hdr *hdr, struct rte_mbuf *m) switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { case VIRTIO_NET_HDR_GSO_TCPV4: case VIRTIO_NET_HDR_GSO_TCPV6: - tcp_hdr = (struct tcp_hdr *)l4_hdr; + tcp_hdr = l4_hdr; m->ol_flags |= PKT_TX_TCP_SEG; m->tso_segsz = hdr->gso_size; m->l4_len = (tcp_hdr->data_off & 0xf0) >> 2; @@ -772,15 +894,16 @@ make_rarp_packet(struct rte_mbuf *rarp_mbuf, const struct ether_addr *mac) return 0; } -static inline void __attribute__((always_inline)) +static __rte_always_inline void put_zmbuf(struct zcopy_mbuf *zmbuf) { zmbuf->in_use = 0; } -static inline int __attribute__((always_inline)) -copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, - uint16_t max_desc, struct rte_mbuf *m, uint16_t desc_idx, +static __rte_always_inline int +copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq, + struct vring_desc *descs, uint16_t max_desc, + struct rte_mbuf *m, uint16_t desc_idx, struct rte_mempool *mbuf_pool) { struct vring_desc *desc; @@ -792,15 +915,25 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, struct virtio_net_hdr *hdr = NULL; /* A counter to avoid desc dead loop chain */ uint32_t nr_desc = 1; + struct batch_copy_elem *batch_copy = vq->batch_copy_elems; + uint16_t copy_nb = vq->batch_copy_nb_elems; + int error = 0; desc = &descs[desc_idx]; if (unlikely((desc->len < dev->vhost_hlen)) || - (desc->flags & VRING_DESC_F_INDIRECT)) - return -1; + (desc->flags & VRING_DESC_F_INDIRECT)) { + error = -1; + goto out; + } - desc_addr = gpa_to_vva(dev, desc->addr); - if (unlikely(!desc_addr)) - return -1; + desc_addr = vhost_iova_to_vva(dev, + vq, desc->addr, + desc->len, + VHOST_ACCESS_RO); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } if (virtio_net_with_host_offload(dev)) { hdr = (struct virtio_net_hdr *)((uintptr_t)desc_addr); @@ -815,12 +948,19 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, if (likely((desc->len == dev->vhost_hlen) && (desc->flags & VRING_DESC_F_NEXT) != 0)) { desc = &descs[desc->next]; - if (unlikely(desc->flags & VRING_DESC_F_INDIRECT)) - return -1; + if (unlikely(desc->flags & VRING_DESC_F_INDIRECT)) { + error = -1; + goto out; + } - desc_addr = gpa_to_vva(dev, desc->addr); - if (unlikely(!desc_addr)) - return -1; + desc_addr = vhost_iova_to_vva(dev, + vq, desc->addr, + desc->len, + VHOST_ACCESS_RO); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } desc_offset = 0; desc_avail = desc->len; @@ -850,8 +990,9 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, desc->addr + desc_offset, cpy_len)))) { cur->data_len = cpy_len; cur->data_off = 0; - cur->buf_addr = (void *)(uintptr_t)desc_addr; - cur->buf_physaddr = hpa; + cur->buf_addr = (void *)(uintptr_t)(desc_addr + + desc_offset); + cur->buf_iova = hpa; /* * In zero copy mode, one mbuf can only reference data @@ -859,10 +1000,24 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, */ mbuf_avail = cpy_len; } else { - rte_memcpy(rte_pktmbuf_mtod_offset(cur, void *, - mbuf_offset), - (void *)((uintptr_t)(desc_addr + desc_offset)), - cpy_len); + if (likely(cpy_len > MAX_BATCH_LEN || + copy_nb >= vq->size || + (hdr && cur == m))) { + rte_memcpy(rte_pktmbuf_mtod_offset(cur, void *, + mbuf_offset), + (void *)((uintptr_t)(desc_addr + + desc_offset)), + cpy_len); + } else { + batch_copy[copy_nb].dst = + rte_pktmbuf_mtod_offset(cur, void *, + mbuf_offset); + batch_copy[copy_nb].src = + (void *)((uintptr_t)(desc_addr + + desc_offset)); + batch_copy[copy_nb].len = cpy_len; + copy_nb++; + } } mbuf_avail -= cpy_len; @@ -876,15 +1031,24 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, break; if (unlikely(desc->next >= max_desc || - ++nr_desc > max_desc)) - return -1; + ++nr_desc > max_desc)) { + error = -1; + goto out; + } desc = &descs[desc->next]; - if (unlikely(desc->flags & VRING_DESC_F_INDIRECT)) - return -1; + if (unlikely(desc->flags & VRING_DESC_F_INDIRECT)) { + error = -1; + goto out; + } - desc_addr = gpa_to_vva(dev, desc->addr); - if (unlikely(!desc_addr)) - return -1; + desc_addr = vhost_iova_to_vva(dev, + vq, desc->addr, + desc->len, + VHOST_ACCESS_RO); + if (unlikely(!desc_addr)) { + error = -1; + goto out; + } rte_prefetch0((void *)(uintptr_t)desc_addr); @@ -903,7 +1067,8 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, if (unlikely(cur == NULL)) { RTE_LOG(ERR, VHOST_DATA, "Failed to " "allocate memory for mbuf.\n"); - return -1; + error = -1; + goto out; } if (unlikely(dev->dequeue_zero_copy)) rte_mbuf_refcnt_update(cur, 1); @@ -925,10 +1090,13 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, if (hdr) vhost_dequeue_offload(hdr, m); - return 0; +out: + vq->batch_copy_nb_elems = copy_nb; + + return error; } -static inline void __attribute__((always_inline)) +static __rte_always_inline void update_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq, uint32_t used_idx, uint32_t desc_idx) { @@ -939,7 +1107,7 @@ update_used_ring(struct virtio_net *dev, struct vhost_virtqueue *vq, sizeof(vq->used->ring[used_idx])); } -static inline void __attribute__((always_inline)) +static __rte_always_inline void update_used_idx(struct virtio_net *dev, struct vhost_virtqueue *vq, uint32_t count) { @@ -959,7 +1127,7 @@ update_used_idx(struct virtio_net *dev, struct vhost_virtqueue *vq, eventfd_write(vq->callfd, (eventfd_t)1); } -static inline struct zcopy_mbuf *__attribute__((always_inline)) +static __rte_always_inline struct zcopy_mbuf * get_zmbuf(struct vhost_virtqueue *vq) { uint16_t i; @@ -990,7 +1158,7 @@ again: return NULL; } -static inline bool __attribute__((always_inline)) +static __rte_always_inline bool mbuf_is_consumed(struct rte_mbuf *m) { while (m) { @@ -1002,6 +1170,22 @@ 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) @@ -1019,16 +1203,29 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, if (!dev) return 0; - if (unlikely(!is_valid_virt_queue_idx(queue_id, 1, dev->virt_qp_nb))) { + if (unlikely(!is_valid_virt_queue_idx(queue_id, 1, dev->nr_vring))) { RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n", dev->vid, __func__, queue_id); return 0; } 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)) + vhost_user_iotlb_rd_lock(vq); + + if (unlikely(vq->access_ok == 0)) + if (unlikely(vring_translate(dev, vq) < 0)) + goto out; + if (unlikely(dev->dequeue_zero_copy)) { struct zcopy_mbuf *zmbuf, *next; int nr_updated = 0; @@ -1044,6 +1241,7 @@ 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; @@ -1127,8 +1325,11 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, rte_prefetch0(&vq->desc[desc_indexes[i + 1]]); if (vq->desc[desc_indexes[i]].flags & VRING_DESC_F_INDIRECT) { - desc = (struct vring_desc *)(uintptr_t)gpa_to_vva(dev, - vq->desc[desc_indexes[i]].addr); + desc = (struct vring_desc *)(uintptr_t) + vhost_iova_to_vva(dev, vq, + vq->desc[desc_indexes[i]].addr, + sizeof(*desc), + VHOST_ACCESS_RO); if (unlikely(!desc)) break; @@ -1148,7 +1349,8 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, break; } - err = copy_desc_to_mbuf(dev, desc, sz, pkts[i], idx, mbuf_pool); + err = copy_desc_to_mbuf(dev, vq, desc, sz, pkts[i], idx, + mbuf_pool); if (unlikely(err)) { rte_pktmbuf_free(pkts[i]); break; @@ -1180,11 +1382,18 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, vq->last_avail_idx += i; if (likely(dev->dequeue_zero_copy == 0)) { + do_data_copy_dequeue(vq); vq->last_used_idx += i; update_used_idx(dev, vq, i); } 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