X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;ds=sidebyside;f=lib%2Flibrte_vhost%2Fvhost.c;h=afded4952f947b9450173beb122ed921b218a271;hb=4754ceaa09f4b77facde941a9a35414d0cd732bb;hp=a31ca50025f9c843b8278e0e7fe17d4dfb34bafc;hpb=1c717af4c699e60081feb1d645f86189551f9a9c;p=dpdk.git

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index a31ca50025..afded4952f 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2010-2016 Intel Corporation
+ * Copyright(c) 2010-2017 Intel Corporation
  */
 
 #include <linux/vhost.h>
@@ -29,20 +29,22 @@ struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
 /* Called with iotlb_lock read-locked */
 uint64_t
 __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
-		    uint64_t iova, uint64_t size, uint8_t perm)
+		    uint64_t iova, uint64_t *size, uint8_t perm)
 {
 	uint64_t vva, tmp_size;
 
-	if (unlikely(!size))
+	if (unlikely(!*size))
 		return 0;
 
-	tmp_size = size;
+	tmp_size = *size;
 
 	vva = vhost_user_iotlb_cache_find(vq, iova, &tmp_size, perm);
-	if (tmp_size == size)
+	if (tmp_size == *size)
 		return vva;
 
-	if (!vhost_user_iotlb_pending_miss(vq, iova + tmp_size, perm)) {
+	iova += tmp_size;
+
+	if (!vhost_user_iotlb_pending_miss(vq, iova, perm)) {
 		/*
 		 * iotlb_lock is read-locked for a full burst,
 		 * but it only protects the iotlb cache.
@@ -52,8 +54,13 @@ __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
 		 */
 		vhost_user_iotlb_rd_unlock(vq);
 
-		vhost_user_iotlb_pending_insert(vq, iova + tmp_size, perm);
-		vhost_user_iotlb_miss(dev, iova + tmp_size, perm);
+		vhost_user_iotlb_pending_insert(vq, iova, perm);
+		if (vhost_user_iotlb_miss(dev, iova, perm)) {
+			RTE_LOG(ERR, VHOST_CONFIG,
+				"IOTLB miss req failed for IOVA 0x%" PRIx64 "\n",
+				iova);
+			vhost_user_iotlb_pending_remove(vq, iova, 1, perm);
+		}
 
 		vhost_user_iotlb_rd_lock(vq);
 	}
@@ -61,19 +68,6 @@ __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
 	return 0;
 }
 
-struct virtio_net *
-get_device(int vid)
-{
-	struct virtio_net *dev = vhost_devices[vid];
-
-	if (unlikely(!dev)) {
-		RTE_LOG(ERR, VHOST_CONFIG,
-			"(%d) device not found.\n", vid);
-	}
-
-	return dev;
-}
-
 void
 cleanup_vq(struct vhost_virtqueue *vq, int destroy)
 {
@@ -124,32 +118,39 @@ free_device(struct virtio_net *dev)
 int
 vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq)
 {
-	uint64_t size;
+	uint64_t req_size, size;
 
 	if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
 		goto out;
 
-	size = sizeof(struct vring_desc) * vq->size;
+	req_size = sizeof(struct vring_desc) * vq->size;
+	size = req_size;
 	vq->desc = (struct vring_desc *)(uintptr_t)vhost_iova_to_vva(dev, vq,
 						vq->ring_addrs.desc_user_addr,
-						size, VHOST_ACCESS_RW);
-	if (!vq->desc)
+						&size, VHOST_ACCESS_RW);
+	if (!vq->desc || size != req_size)
 		return -1;
 
-	size = sizeof(struct vring_avail);
-	size += sizeof(uint16_t) * vq->size;
+	req_size = sizeof(struct vring_avail);
+	req_size += sizeof(uint16_t) * vq->size;
+	if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
+		req_size += sizeof(uint16_t);
+	size = req_size;
 	vq->avail = (struct vring_avail *)(uintptr_t)vhost_iova_to_vva(dev, vq,
 						vq->ring_addrs.avail_user_addr,
-						size, VHOST_ACCESS_RW);
-	if (!vq->avail)
+						&size, VHOST_ACCESS_RW);
+	if (!vq->avail || size != req_size)
 		return -1;
 
-	size = sizeof(struct vring_used);
-	size += sizeof(struct vring_used_elem) * vq->size;
+	req_size = sizeof(struct vring_used);
+	req_size += sizeof(struct vring_used_elem) * vq->size;
+	if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
+		req_size += sizeof(uint16_t);
+	size = req_size;
 	vq->used = (struct vring_used *)(uintptr_t)vhost_iova_to_vva(dev, vq,
 						vq->ring_addrs.used_user_addr,
-						size, VHOST_ACCESS_RW);
-	if (!vq->used)
+						&size, VHOST_ACCESS_RW);
+	if (!vq->used || size != req_size)
 		return -1;
 
 out:
@@ -289,6 +290,7 @@ vhost_new_device(void)
 	dev->vid = i;
 	dev->flags = VIRTIO_DEV_BUILTIN_VIRTIO_NET;
 	dev->slave_req_fd = -1;
+	dev->vdpa_dev_id = -1;
 
 	return i;
 }
@@ -301,11 +303,17 @@ void
 vhost_destroy_device(int vid)
 {
 	struct virtio_net *dev = get_device(vid);
+	struct rte_vdpa_device *vdpa_dev;
+	int did = -1;
 
 	if (dev == NULL)
 		return;
 
 	if (dev->flags & VIRTIO_DEV_RUNNING) {
+		did = dev->vdpa_dev_id;
+		vdpa_dev = rte_vdpa_get_device(did);
+		if (vdpa_dev && vdpa_dev->ops->dev_close)
+			vdpa_dev->ops->dev_close(dev->vid);
 		dev->flags &= ~VIRTIO_DEV_RUNNING;
 		dev->notify_ops->destroy_device(vid);
 	}
@@ -316,6 +324,31 @@ vhost_destroy_device(int vid)
 	vhost_devices[vid] = NULL;
 }
 
+void
+vhost_attach_vdpa_device(int vid, int did)
+{
+	struct virtio_net *dev = get_device(vid);
+
+	if (dev == NULL)
+		return;
+
+	if (rte_vdpa_get_device(did) == NULL)
+		return;
+
+	dev->vdpa_dev_id = did;
+}
+
+void
+vhost_detach_vdpa_device(int vid)
+{
+	struct virtio_net *dev = get_device(vid);
+
+	if (dev == NULL)
+		return;
+
+	dev->vdpa_dev_id = -1;
+}
+
 void
 vhost_set_ifname(int vid, const char *if_name, unsigned int if_len)
 {
@@ -551,16 +584,14 @@ rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
 {
 	struct virtio_net *dev = get_device(vid);
 
-	if (dev == NULL)
-		return -1;
-
-	if (enable) {
-		RTE_LOG(ERR, VHOST_CONFIG,
-			"guest notification isn't supported.\n");
+	if (!dev)
 		return -1;
-	}
 
-	dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
+	if (enable)
+		dev->virtqueue[queue_id]->used->flags &=
+			~VRING_USED_F_NO_NOTIFY;
+	else
+		dev->virtqueue[queue_id]->used->flags |= VRING_USED_F_NO_NOTIFY;
 	return 0;
 }
 
@@ -620,3 +651,76 @@ rte_vhost_rx_queue_count(int vid, uint16_t qid)
 
 	return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
 }
+
+int rte_vhost_get_vdpa_device_id(int vid)
+{
+	struct virtio_net *dev = get_device(vid);
+
+	if (dev == NULL)
+		return -1;
+
+	return dev->vdpa_dev_id;
+}
+
+int rte_vhost_get_log_base(int vid, uint64_t *log_base,
+		uint64_t *log_size)
+{
+	struct virtio_net *dev = get_device(vid);
+
+	if (!dev)
+		return -1;
+
+	if (unlikely(!(dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET))) {
+		RTE_LOG(ERR, VHOST_DATA,
+			"(%d) %s: built-in vhost net backend is disabled.\n",
+			dev->vid, __func__);
+		return -1;
+	}
+
+	*log_base = dev->log_base;
+	*log_size = dev->log_size;
+
+	return 0;
+}
+
+int rte_vhost_get_vring_base(int vid, uint16_t queue_id,
+		uint16_t *last_avail_idx, uint16_t *last_used_idx)
+{
+	struct virtio_net *dev = get_device(vid);
+
+	if (!dev)
+		return -1;
+
+	if (unlikely(!(dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET))) {
+		RTE_LOG(ERR, VHOST_DATA,
+			"(%d) %s: built-in vhost net backend is disabled.\n",
+			dev->vid, __func__);
+		return -1;
+	}
+
+	*last_avail_idx = dev->virtqueue[queue_id]->last_avail_idx;
+	*last_used_idx = dev->virtqueue[queue_id]->last_used_idx;
+
+	return 0;
+}
+
+int rte_vhost_set_vring_base(int vid, uint16_t queue_id,
+		uint16_t last_avail_idx, uint16_t last_used_idx)
+{
+	struct virtio_net *dev = get_device(vid);
+
+	if (!dev)
+		return -1;
+
+	if (unlikely(!(dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET))) {
+		RTE_LOG(ERR, VHOST_DATA,
+			"(%d) %s: built-in vhost net backend is disabled.\n",
+			dev->vid, __func__);
+		return -1;
+	}
+
+	dev->virtqueue[queue_id]->last_avail_idx = last_avail_idx;
+	dev->virtqueue[queue_id]->last_used_idx = last_used_idx;
+
+	return 0;
+}