vhost: support interrupt mode

[dpdk.git] / lib / librte_vhost / vhost.c

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 1dd9adb..5ddf55e 100644 (file)
--- 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>
@@ -42,7 +42,9 @@ __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
        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)
 {
@@ -251,7 +245,7 @@ reset_device(struct virtio_net *dev)
 
        dev->features = 0;
        dev->protocol_features = 0;
-       dev->flags = 0;
+       dev->flags &= VIRTIO_DEV_BUILTIN_VIRTIO_NET;
 
        for (i = 0; i < dev->nr_vring; i++)
                reset_vring_queue(dev, i);
@@ -287,7 +281,9 @@ vhost_new_device(void)
 
        vhost_devices[i] = dev;
        dev->vid = i;
+       dev->flags = VIRTIO_DEV_BUILTIN_VIRTIO_NET;
        dev->slave_req_fd = -1;
+       dev->vdpa_dev_id = -1;
 
        return i;
 }
@@ -300,11 +296,17 @@ 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);
        }
@@ -315,6 +317,31 @@ 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)
 {
@@ -343,6 +370,20 @@ vhost_enable_dequeue_zero_copy(int vid)
        dev->dequeue_zero_copy = 1;
 }
 
+void
+vhost_set_builtin_virtio_net(int vid, bool enable)
+{
+       struct virtio_net *dev = get_device(vid);
+
+       if (dev == NULL)
+               return;
+
+       if (enable)
+               dev->flags |= VIRTIO_DEV_BUILTIN_VIRTIO_NET;
+       else
+               dev->flags &= ~VIRTIO_DEV_BUILTIN_VIRTIO_NET;
+}
+
 int
 rte_vhost_get_mtu(int vid, uint16_t *mtu)
 {
@@ -536,16 +577,14 @@ 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;
 }
 
@@ -605,3 +644,76 @@ 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;
+}