/* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2010-2016 Intel Corporation
+ * Copyright(c) 2010-2017 Intel Corporation
*/
#include <linux/vhost.h>
/* 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;
iova += tmp_size;
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)
{
}
void
-free_vq(struct vhost_virtqueue *vq)
+free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq)
{
- rte_free(vq->shadow_used_ring);
+ if (vq_is_packed(dev))
+ rte_free(vq->shadow_used_packed);
+ else
+ rte_free(vq->shadow_used_split);
rte_free(vq->batch_copy_elems);
rte_mempool_free(vq->iotlb_pool);
rte_free(vq);
uint32_t i;
for (i = 0; i < dev->nr_vring; i++)
- free_vq(dev->virtqueue[i]);
+ free_vq(dev, dev->virtqueue[i]);
rte_free(dev);
}
-int
-vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq)
+static int
+vring_translate_split(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;
+
+ return 0;
+}
+
+static int
+vring_translate_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ uint64_t req_size, size;
+
+ req_size = sizeof(struct vring_packed_desc) * vq->size;
+ size = req_size;
+ vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
+ vhost_iova_to_vva(dev, vq, vq->ring_addrs.desc_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->desc_packed || size != req_size)
return -1;
+ req_size = sizeof(struct vring_packed_desc_event);
+ size = req_size;
+ vq->driver_event = (struct vring_packed_desc_event *)(uintptr_t)
+ vhost_iova_to_vva(dev, vq, vq->ring_addrs.avail_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->driver_event || size != req_size)
+ return -1;
+
+ req_size = sizeof(struct vring_packed_desc_event);
+ size = req_size;
+ vq->device_event = (struct vring_packed_desc_event *)(uintptr_t)
+ vhost_iova_to_vva(dev, vq, vq->ring_addrs.used_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->device_event || size != req_size)
+ return -1;
+
+ return 0;
+}
+
+int
+vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+
+ if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
+ goto out;
+
+ if (vq_is_packed(dev)) {
+ if (vring_translate_packed(dev, vq) < 0)
+ return -1;
+ } else {
+ if (vring_translate_split(dev, vq) < 0)
+ return -1;
+ }
out:
vq->access_ok = 1;
dev->virtqueue[vring_idx] = vq;
init_vring_queue(dev, vring_idx);
rte_spinlock_init(&vq->access_lock);
+ vq->avail_wrap_counter = 1;
+ vq->used_wrap_counter = 1;
+ vq->signalled_used_valid = false;
dev->nr_vring += 1;
struct virtio_net *dev;
int i;
- dev = rte_zmalloc(NULL, sizeof(struct virtio_net), 0);
- if (dev == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to allocate memory for new dev.\n");
- return -1;
- }
-
for (i = 0; i < MAX_VHOST_DEVICE; i++) {
if (vhost_devices[i] == NULL)
break;
}
+
if (i == MAX_VHOST_DEVICE) {
RTE_LOG(ERR, VHOST_CONFIG,
"Failed to find a free slot for new device.\n");
- rte_free(dev);
+ return -1;
+ }
+
+ dev = rte_zmalloc(NULL, sizeof(struct virtio_net), 0);
+ if (dev == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to allocate memory for new dev.\n");
return -1;
}
dev->vid = i;
dev->flags = VIRTIO_DEV_BUILTIN_VIRTIO_NET;
dev->slave_req_fd = -1;
+ dev->vdpa_dev_id = -1;
+ rte_spinlock_init(&dev->slave_req_lock);
return i;
}
+void
+vhost_destroy_device_notify(struct virtio_net *dev)
+{
+ struct rte_vdpa_device *vdpa_dev;
+ int did;
+
+ 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(dev->vid);
+ }
+}
+
/*
* Invoked when there is the vhost-user connection is broken (when
* the virtio device is being detached).
if (dev == NULL)
return;
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- dev->notify_ops->destroy_device(vid);
- }
+ vhost_destroy_device_notify(dev);
cleanup_device(dev, 1);
free_device(dev);
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;
+
+ vhost_user_host_notifier_ctrl(vid, false);
+
+ dev->vdpa_dev_id = -1;
+}
+
void
vhost_set_ifname(int vid, const char *if_name, unsigned int if_len)
{
if (!vq)
return -1;
- vhost_vring_call(dev, vq);
+ if (vq_is_packed(dev))
+ vhost_vring_call_packed(dev, vq);
+ else
+ vhost_vring_call_split(dev, vq);
+
return 0;
}
return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx;
}
+static inline void
+vhost_enable_notify_split(struct vhost_virtqueue *vq, int enable)
+{
+ if (enable)
+ vq->used->flags &= ~VRING_USED_F_NO_NOTIFY;
+ else
+ vq->used->flags |= VRING_USED_F_NO_NOTIFY;
+}
+
+static inline void
+vhost_enable_notify_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq, int enable)
+{
+ uint16_t flags;
+
+ if (!enable)
+ vq->device_event->flags = VRING_EVENT_F_DISABLE;
+
+ flags = VRING_EVENT_F_ENABLE;
+ if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) {
+ flags = VRING_EVENT_F_DESC;
+ vq->device_event->off_wrap = vq->last_avail_idx |
+ vq->avail_wrap_counter << 15;
+ }
+
+ rte_smp_wmb();
+
+ vq->device_event->flags = flags;
+}
+
int
rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
{
struct virtio_net *dev = get_device(vid);
+ struct vhost_virtqueue *vq;
- if (dev == NULL)
+ if (!dev)
return -1;
- if (enable) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "guest notification isn't supported.\n");
- return -1;
- }
+ vq = dev->virtqueue[queue_id];
+
+ if (vq_is_packed(dev))
+ vhost_enable_notify_packed(dev, vq, enable);
+ else
+ vhost_enable_notify_split(vq, enable);
- dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
return 0;
}
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;
+}
Code Review / deb_dpdk.git / blobdiff