From: Fan Zhang Date: Thu, 10 May 2018 15:41:22 +0000 (+0100) Subject: vhost/crypto: handle virtually non-contiguous buffers X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=3c79609fda7c;p=dpdk.git vhost/crypto: handle virtually non-contiguous buffers This patch enables the handling of buffers non-contiguous in virtual address space in the vhost_crypto. Instead of using rte_vhost_va_from_guest_pa(), the host virtual address is converted by vhost_iova_to_vva() for wider use cases. For copy mode, the copy length is limited to the chunk size, next chunks VAs being fetched afterward. Signed-off-by: Fan Zhang Reviewed-by: Maxime Coquelin --- diff --git a/lib/librte_vhost/vhost_crypto.c b/lib/librte_vhost/vhost_crypto.c index 4c256284e8..f1650738a2 100644 --- a/lib/librte_vhost/vhost_crypto.c +++ b/lib/librte_vhost/vhost_crypto.c @@ -42,7 +42,8 @@ (1 << VIRTIO_CRYPTO_SERVICE_MAC) | \ (1 << VIRTIO_NET_F_CTRL_VQ)) -#define GPA_TO_VVA(t, m, a, l) ((t)(uintptr_t)rte_vhost_va_from_guest_pa(m, a, l)) +#define IOVA_TO_VVA(t, r, a, l, p) \ + ((t)(uintptr_t)vhost_iova_to_vva(r->dev, r->vq, a, l, p)) static int cipher_algo_transform(uint32_t virtio_cipher_algo) @@ -216,7 +217,7 @@ struct vhost_crypto { struct vhost_crypto_data_req { struct vring_desc *head; - struct rte_vhost_memory *mem; + struct virtio_net *dev; struct virtio_crypto_inhdr *inhdr; struct vhost_virtqueue *vq; struct vring_desc *wb_desc; @@ -473,18 +474,18 @@ find_write_desc(struct vring_desc *head, struct vring_desc *desc) } static struct virtio_crypto_inhdr * -reach_inhdr(struct vring_desc *head, struct rte_vhost_memory *mem, - struct vring_desc *desc) +reach_inhdr(struct vhost_crypto_data_req *vc_req, struct vring_desc *desc) { uint64_t dlen; struct virtio_crypto_inhdr *inhdr; while (desc->flags & VRING_DESC_F_NEXT) - desc = &head[desc->next]; + desc = &vc_req->head[desc->next]; dlen = desc->len; - inhdr = GPA_TO_VVA(struct virtio_crypto_inhdr *, mem, desc->addr, &dlen); - if (unlikely(dlen != desc->len)) + inhdr = IOVA_TO_VVA(struct virtio_crypto_inhdr *, vc_req, desc->addr, + &dlen, VHOST_ACCESS_WO); + if (unlikely(!inhdr || dlen != desc->len)) return NULL; return inhdr; @@ -516,40 +517,86 @@ move_desc(struct vring_desc *head, struct vring_desc **cur_desc, } static int -copy_data(void *dst_data, struct vring_desc *head, struct rte_vhost_memory *mem, +copy_data(void *dst_data, struct vhost_crypto_data_req *vc_req, struct vring_desc **cur_desc, uint32_t size) { struct vring_desc *desc = *cur_desc; + uint64_t remain, addr, dlen, len; uint32_t to_copy; uint8_t *data = dst_data; uint8_t *src; int left = size; - uint64_t dlen; - rte_prefetch0(&head[desc->next]); + rte_prefetch0(&vc_req->head[desc->next]); to_copy = RTE_MIN(desc->len, (uint32_t)left); - dlen = desc->len; - src = GPA_TO_VVA(uint8_t *, mem, desc->addr, &dlen); - if (unlikely(!src || dlen != desc->len)) { + dlen = to_copy; + src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen, + VHOST_ACCESS_RO); + if (unlikely(!src || !dlen)) { VC_LOG_ERR("Failed to map descriptor"); return -1; } - rte_memcpy((uint8_t *)data, src, to_copy); + rte_memcpy((uint8_t *)data, src, dlen); + data += dlen; + + if (unlikely(dlen < to_copy)) { + remain = to_copy - dlen; + addr = desc->addr + dlen; + + while (remain) { + len = remain; + src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len, + VHOST_ACCESS_RO); + if (unlikely(!src || !len)) { + VC_LOG_ERR("Failed to map descriptor"); + return -1; + } + + rte_memcpy(data, src, len); + addr += len; + remain -= len; + data += len; + } + } + left -= to_copy; while ((desc->flags & VRING_DESC_F_NEXT) && left > 0) { - desc = &head[desc->next]; - rte_prefetch0(&head[desc->next]); + desc = &vc_req->head[desc->next]; + rte_prefetch0(&vc_req->head[desc->next]); to_copy = RTE_MIN(desc->len, (uint32_t)left); dlen = desc->len; - src = GPA_TO_VVA(uint8_t *, mem, desc->addr, &dlen); - if (unlikely(!src || dlen != desc->len)) { + src = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen, + VHOST_ACCESS_RO); + if (unlikely(!src || !dlen)) { VC_LOG_ERR("Failed to map descriptor"); return -1; } - rte_memcpy(data + size - left, src, to_copy); + rte_memcpy(data, src, dlen); + data += dlen; + + if (unlikely(dlen < to_copy)) { + remain = to_copy - dlen; + addr = desc->addr + dlen; + + while (remain) { + len = remain; + src = IOVA_TO_VVA(uint8_t *, vc_req, addr, &len, + VHOST_ACCESS_RO); + if (unlikely(!src || !len)) { + VC_LOG_ERR("Failed to map descriptor"); + return -1; + } + + rte_memcpy(data, src, len); + addr += len; + remain -= len; + data += len; + } + } + left -= to_copy; } @@ -558,25 +605,25 @@ copy_data(void *dst_data, struct vring_desc *head, struct rte_vhost_memory *mem, return -1; } - *cur_desc = &head[desc->next]; + *cur_desc = &vc_req->head[desc->next]; return 0; } static __rte_always_inline void * -get_data_ptr(struct vring_desc *head, struct rte_vhost_memory *mem, - struct vring_desc **cur_desc, uint32_t size) +get_data_ptr(struct vhost_crypto_data_req *vc_req, struct vring_desc **cur_desc, + uint32_t size, uint8_t perm) { void *data; uint64_t dlen = (*cur_desc)->len; - data = GPA_TO_VVA(void *, mem, (*cur_desc)->addr, &dlen); + data = IOVA_TO_VVA(void *, vc_req, (*cur_desc)->addr, &dlen, perm); if (unlikely(!data || dlen != (*cur_desc)->len)) { VC_LOG_ERR("Failed to map object"); return NULL; } - if (unlikely(move_desc(head, cur_desc, size) < 0)) + if (unlikely(move_desc(vc_req->head, cur_desc, size) < 0)) return NULL; return data; @@ -587,7 +634,6 @@ write_back_data(struct rte_crypto_op *op, struct vhost_crypto_data_req *vc_req) { struct rte_mbuf *mbuf = op->sym->m_dst; struct vring_desc *head = vc_req->head; - struct rte_vhost_memory *mem = vc_req->mem; struct vring_desc *desc = vc_req->wb_desc; int left = vc_req->wb_len; uint32_t to_write; @@ -597,7 +643,8 @@ write_back_data(struct rte_crypto_op *op, struct vhost_crypto_data_req *vc_req) rte_prefetch0(&head[desc->next]); to_write = RTE_MIN(desc->len, (uint32_t)left); dlen = desc->len; - dst = GPA_TO_VVA(uint8_t *, mem, desc->addr, &dlen); + dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen, + VHOST_ACCESS_RW); if (unlikely(!dst || dlen != desc->len)) { VC_LOG_ERR("Failed to map descriptor"); return -1; @@ -612,7 +659,8 @@ write_back_data(struct rte_crypto_op *op, struct vhost_crypto_data_req *vc_req) rte_prefetch0(&head[desc->next]); to_write = RTE_MIN(desc->len, (uint32_t)left); dlen = desc->len; - dst = GPA_TO_VVA(uint8_t *, mem, desc->addr, &dlen); + dst = IOVA_TO_VVA(uint8_t *, vc_req, desc->addr, &dlen, + VHOST_ACCESS_RW); if (unlikely(!dst || dlen != desc->len)) { VC_LOG_ERR("Failed to map descriptor"); return -1; @@ -637,16 +685,14 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, struct virtio_crypto_cipher_data_req *cipher, struct vring_desc *cur_desc) { - struct vring_desc *head = vc_req->head; struct vring_desc *desc = cur_desc; - struct rte_vhost_memory *mem = vc_req->mem; struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst; uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET); uint8_t ret = 0; /* prepare */ /* iv */ - if (unlikely(copy_data(iv_data, head, mem, &desc, + if (unlikely(copy_data(iv_data, vc_req, &desc, cipher->para.iv_len) < 0)) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; @@ -658,8 +704,8 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE: m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr, cipher->para.src_data_len); - m_src->buf_addr = get_data_ptr(head, mem, &desc, - cipher->para.src_data_len); + m_src->buf_addr = get_data_ptr(vc_req, &desc, + cipher->para.src_data_len, VHOST_ACCESS_RO); if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) { VC_LOG_ERR("zero_copy may fail due to cross page data"); @@ -674,8 +720,8 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, ret = VIRTIO_CRYPTO_ERR; goto error_exit; } - if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *), head, - mem, &desc, cipher->para.src_data_len) + if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *), + vc_req, &desc, cipher->para.src_data_len) < 0)) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; @@ -687,7 +733,7 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, } /* dst */ - desc = find_write_desc(head, desc); + desc = find_write_desc(vc_req->head, desc); if (unlikely(!desc)) { VC_LOG_ERR("Cannot find write location"); ret = VIRTIO_CRYPTO_BADMSG; @@ -698,8 +744,8 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE: m_dst->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr, cipher->para.dst_data_len); - m_dst->buf_addr = get_data_ptr(head, mem, &desc, - cipher->para.dst_data_len); + m_dst->buf_addr = get_data_ptr(vc_req, &desc, + cipher->para.dst_data_len, VHOST_ACCESS_RW); if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) { VC_LOG_ERR("zero_copy may fail due to cross page data"); ret = VIRTIO_CRYPTO_ERR; @@ -711,7 +757,8 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE: vc_req->wb_desc = desc; vc_req->wb_len = cipher->para.dst_data_len; - if (unlikely(move_desc(head, &desc, vc_req->wb_len) < 0)) { + if (unlikely(move_desc(vc_req->head, &desc, + vc_req->wb_len) < 0)) { ret = VIRTIO_CRYPTO_ERR; goto error_exit; } @@ -728,7 +775,7 @@ prepare_sym_cipher_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, op->sym->cipher.data.offset = 0; op->sym->cipher.data.length = cipher->para.src_data_len; - vc_req->inhdr = get_data_ptr(head, mem, &desc, INHDR_LEN); + vc_req->inhdr = get_data_ptr(vc_req, &desc, INHDR_LEN, VHOST_ACCESS_WO); if (unlikely(vc_req->inhdr == NULL)) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; @@ -750,9 +797,7 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, struct virtio_crypto_alg_chain_data_req *chain, struct vring_desc *cur_desc) { - struct vring_desc *head = vc_req->head; struct vring_desc *desc = cur_desc; - struct rte_vhost_memory *mem = vc_req->mem; struct rte_mbuf *m_src = op->sym->m_src, *m_dst = op->sym->m_dst; uint8_t *iv_data = rte_crypto_op_ctod_offset(op, uint8_t *, IV_OFFSET); uint32_t digest_offset; @@ -761,7 +806,7 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, /* prepare */ /* iv */ - if (unlikely(copy_data(iv_data, head, mem, &desc, + if (unlikely(copy_data(iv_data, vc_req, &desc, chain->para.iv_len) < 0)) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; @@ -774,8 +819,8 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE: m_src->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr, chain->para.src_data_len); - m_src->buf_addr = get_data_ptr(head, mem, &desc, - chain->para.src_data_len); + m_src->buf_addr = get_data_ptr(vc_req, &desc, + chain->para.src_data_len, VHOST_ACCESS_RO); if (unlikely(m_src->buf_iova == 0 || m_src->buf_addr == NULL)) { VC_LOG_ERR("zero_copy may fail due to cross page data"); ret = VIRTIO_CRYPTO_ERR; @@ -789,8 +834,8 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, ret = VIRTIO_CRYPTO_ERR; goto error_exit; } - if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *), head, - mem, &desc, chain->para.src_data_len)) < 0) { + if (unlikely(copy_data(rte_pktmbuf_mtod(m_src, uint8_t *), + vc_req, &desc, chain->para.src_data_len)) < 0) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; } @@ -801,7 +846,7 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, } /* dst */ - desc = find_write_desc(head, desc); + desc = find_write_desc(vc_req->head, desc); if (unlikely(!desc)) { VC_LOG_ERR("Cannot find write location"); ret = VIRTIO_CRYPTO_BADMSG; @@ -812,8 +857,8 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE: m_dst->buf_iova = gpa_to_hpa(vcrypto->dev, desc->addr, chain->para.dst_data_len); - m_dst->buf_addr = get_data_ptr(head, mem, &desc, - chain->para.dst_data_len); + m_dst->buf_addr = get_data_ptr(vc_req, &desc, + chain->para.dst_data_len, VHOST_ACCESS_RW); if (unlikely(m_dst->buf_iova == 0 || m_dst->buf_addr == NULL)) { VC_LOG_ERR("zero_copy may fail due to cross page data"); ret = VIRTIO_CRYPTO_ERR; @@ -822,8 +867,8 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, op->sym->auth.digest.phys_addr = gpa_to_hpa(vcrypto->dev, desc->addr, chain->para.hash_result_len); - op->sym->auth.digest.data = get_data_ptr(head, mem, &desc, - chain->para.hash_result_len); + op->sym->auth.digest.data = get_data_ptr(vc_req, &desc, + chain->para.hash_result_len, VHOST_ACCESS_RW); if (unlikely(op->sym->auth.digest.phys_addr == 0)) { VC_LOG_ERR("zero_copy may fail due to cross page data"); ret = VIRTIO_CRYPTO_ERR; @@ -838,13 +883,13 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, vc_req->wb_desc = desc; vc_req->wb_len = m_dst->data_len + chain->para.hash_result_len; - if (unlikely(move_desc(head, &desc, + if (unlikely(move_desc(vc_req->head, &desc, chain->para.dst_data_len) < 0)) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; } - if (unlikely(copy_data(digest_addr, head, mem, &desc, + if (unlikely(copy_data(digest_addr, vc_req, &desc, chain->para.hash_result_len)) < 0) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; @@ -860,7 +905,7 @@ prepare_sym_chain_op(struct vhost_crypto *vcrypto, struct rte_crypto_op *op, } /* record inhdr */ - vc_req->inhdr = get_data_ptr(head, mem, &desc, INHDR_LEN); + vc_req->inhdr = get_data_ptr(vc_req, &desc, INHDR_LEN, VHOST_ACCESS_WO); if (unlikely(vc_req->inhdr == NULL)) { ret = VIRTIO_CRYPTO_BADMSG; goto error_exit; @@ -893,13 +938,12 @@ error_exit: static __rte_always_inline int vhost_crypto_process_one_req(struct vhost_crypto *vcrypto, struct vhost_virtqueue *vq, struct rte_crypto_op *op, - struct vring_desc *head, uint16_t desc_idx, - struct rte_vhost_memory *mem) + struct vring_desc *head, uint16_t desc_idx) { struct vhost_crypto_data_req *vc_req = RTE_PTR_ADD(op->sym->m_src, sizeof(struct rte_mbuf)); struct rte_cryptodev_sym_session *session; - struct virtio_crypto_op_data_req *req; + struct virtio_crypto_op_data_req *req, tmp_req; struct virtio_crypto_inhdr *inhdr; struct vring_desc *desc = NULL; uint64_t session_id; @@ -907,10 +951,13 @@ vhost_crypto_process_one_req(struct vhost_crypto *vcrypto, int err = 0; vc_req->desc_idx = desc_idx; + vc_req->dev = vcrypto->dev; + vc_req->vq = vq; if (likely(head->flags & VRING_DESC_F_INDIRECT)) { dlen = head->len; - desc = GPA_TO_VVA(struct vring_desc *, mem, head->addr, &dlen); + desc = IOVA_TO_VVA(struct vring_desc *, vc_req, head->addr, + &dlen, VHOST_ACCESS_RO); if (unlikely(!desc || dlen != head->len)) return -1; desc_idx = 0; @@ -919,17 +966,30 @@ vhost_crypto_process_one_req(struct vhost_crypto *vcrypto, desc = head; } - vc_req->mem = mem; vc_req->head = head; - vc_req->vq = vq; - vc_req->zero_copy = vcrypto->option; - req = get_data_ptr(head, mem, &desc, sizeof(*req)); + req = get_data_ptr(vc_req, &desc, sizeof(*req), VHOST_ACCESS_RO); if (unlikely(req == NULL)) { - err = VIRTIO_CRYPTO_ERR; - VC_LOG_ERR("Invalid descriptor"); - goto error_exit; + switch (vcrypto->option) { + case RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE: + err = VIRTIO_CRYPTO_BADMSG; + VC_LOG_ERR("Invalid descriptor"); + goto error_exit; + case RTE_VHOST_CRYPTO_ZERO_COPY_DISABLE: + req = &tmp_req; + if (unlikely(copy_data(req, vc_req, &desc, sizeof(*req)) + < 0)) { + err = VIRTIO_CRYPTO_BADMSG; + VC_LOG_ERR("Invalid descriptor"); + goto error_exit; + } + break; + default: + err = VIRTIO_CRYPTO_ERR; + VC_LOG_ERR("Invalid option"); + goto error_exit; + } } switch (req->header.opcode) { @@ -989,7 +1049,7 @@ vhost_crypto_process_one_req(struct vhost_crypto *vcrypto, error_exit: - inhdr = reach_inhdr(head, mem, desc); + inhdr = reach_inhdr(vc_req, desc); if (likely(inhdr != NULL)) inhdr->status = (uint8_t)err; @@ -1216,7 +1276,6 @@ rte_vhost_crypto_fetch_requests(int vid, uint32_t qid, { struct rte_mbuf *mbufs[VHOST_CRYPTO_MAX_BURST_SIZE * 2]; struct virtio_net *dev = get_device(vid); - struct rte_vhost_memory *mem; struct vhost_crypto *vcrypto; struct vhost_virtqueue *vq; uint16_t avail_idx; @@ -1242,7 +1301,6 @@ rte_vhost_crypto_fetch_requests(int vid, uint32_t qid, } vq = dev->virtqueue[qid]; - mem = dev->mem; avail_idx = *((volatile uint16_t *)&vq->avail->idx); start_idx = vq->last_used_idx; @@ -1275,7 +1333,7 @@ rte_vhost_crypto_fetch_requests(int vid, uint32_t qid, op->sym->m_dst->data_off = 0; if (unlikely(vhost_crypto_process_one_req(vcrypto, vq, op, head, - desc_idx, mem)) < 0) + desc_idx)) < 0) break; }