From: Yuanhan Liu Date: Sat, 1 Apr 2017 07:22:46 +0000 (+0800) Subject: vhost: export API to translate gpa to vva X-Git-Tag: spdx-start~3892 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=dba9bf127b01d023d3dd377cb2ba49892b1b4597;p=dpdk.git vhost: export API to translate gpa to vva Signed-off-by: Yuanhan Liu Reviewed-by: Maxime Coquelin --- diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map index 93b67339fb..2b309b25e4 100644 --- a/lib/librte_vhost/rte_vhost_version.map +++ b/lib/librte_vhost/rte_vhost_version.map @@ -39,5 +39,6 @@ DPDK_17.05 { rte_vhost_get_mtu; rte_vhost_get_negotiated_features; rte_vhost_get_vhost_vring; + rte_vhost_gpa_to_vva; } DPDK_16.07; diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h index 31e175b16c..66a75119b7 100644 --- a/lib/librte_vhost/rte_virtio_net.h +++ b/lib/librte_vhost/rte_virtio_net.h @@ -103,6 +103,34 @@ struct virtio_net_device_ops { void *reserved[5]; /**< Reserved for future extension */ }; +/** + * Convert guest physical address to host virtual address + * + * @param mem + * the guest memory regions + * @param gpa + * the guest physical address for querying + * @return + * the host virtual address on success, 0 on failure + */ +static inline uint64_t __attribute__((always_inline)) +rte_vhost_gpa_to_vva(struct rte_vhost_memory *mem, uint64_t gpa) +{ + struct rte_vhost_mem_region *reg; + uint32_t i; + + for (i = 0; i < mem->nregions; i++) { + reg = &mem->regions[i]; + if (gpa >= reg->guest_phys_addr && + gpa < reg->guest_phys_addr + reg->size) { + return gpa - reg->guest_phys_addr + + reg->host_user_addr; + } + } + + return 0; +} + int rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable); /** diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index 68ca19769b..b5c5046405 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -229,25 +229,6 @@ extern uint64_t VHOST_FEATURES; #define MAX_VHOST_DEVICE 1024 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE]; -/* Convert guest physical Address to host virtual address */ -static inline uint64_t __attribute__((always_inline)) -gpa_to_vva(struct virtio_net *dev, uint64_t gpa) -{ - struct rte_vhost_mem_region *reg; - uint32_t i; - - for (i = 0; i < dev->mem->nregions; i++) { - reg = &dev->mem->regions[i]; - if (gpa >= reg->guest_phys_addr && - gpa < reg->guest_phys_addr + reg->size) { - return gpa - reg->guest_phys_addr + - reg->host_user_addr; - } - } - - return 0; -} - /* Convert guest physical address to host physical address */ static inline phys_addr_t __attribute__((always_inline)) gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size) diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index d0a3b11131..c1187d4fcf 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -199,7 +199,7 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vring_desc *descs, uint16_t nr_desc = 1; desc = &descs[desc_idx]; - desc_addr = gpa_to_vva(dev, desc->addr); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr); /* * 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 @@ -239,7 +239,7 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vring_desc *descs, return -1; desc = &descs[desc->next]; - desc_addr = gpa_to_vva(dev, desc->addr); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr); if (unlikely(!desc_addr)) return -1; @@ -323,7 +323,8 @@ 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, + descs = (struct vring_desc *)(uintptr_t) + rte_vhost_gpa_to_vva(dev->mem, vq->desc[desc_idx].addr); if (unlikely(!descs)) { count = i; @@ -383,7 +384,7 @@ 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); + rte_vhost_gpa_to_vva(dev->mem, vq->desc[idx].addr); if (unlikely(!descs)) return -1; @@ -473,7 +474,7 @@ copy_mbuf_to_desc_mergeable(struct virtio_net *dev, struct rte_mbuf *m, if (unlikely(m == NULL)) return -1; - desc_addr = gpa_to_vva(dev, buf_vec[vec_idx].buf_addr); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, buf_vec[vec_idx].buf_addr); if (buf_vec[vec_idx].buf_len < dev->vhost_hlen || !desc_addr) return -1; @@ -495,7 +496,8 @@ 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); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, + buf_vec[vec_idx].buf_addr); if (unlikely(!desc_addr)) return -1; @@ -798,7 +800,7 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, (desc->flags & VRING_DESC_F_INDIRECT)) return -1; - desc_addr = gpa_to_vva(dev, desc->addr); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr); if (unlikely(!desc_addr)) return -1; @@ -818,7 +820,7 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, if (unlikely(desc->flags & VRING_DESC_F_INDIRECT)) return -1; - desc_addr = gpa_to_vva(dev, desc->addr); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr); if (unlikely(!desc_addr)) return -1; @@ -882,7 +884,7 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct vring_desc *descs, if (unlikely(desc->flags & VRING_DESC_F_INDIRECT)) return -1; - desc_addr = gpa_to_vva(dev, desc->addr); + desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr); if (unlikely(!desc_addr)) return -1; @@ -1125,7 +1127,8 @@ 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, + desc = (struct vring_desc *)(uintptr_t) + rte_vhost_gpa_to_vva(dev->mem, vq->desc[desc_indexes[i]].addr); if (unlikely(!desc)) break;