vhost: move vhost-net zerocopy fields to net.c
On top of 'vhost: Allow device specific fields per vq', we can move device
specific fields to device virt queue from vhost virt queue.
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index bef8b6b..6644812 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -33,8 +33,6 @@
VHOST_MEMORY_F_LOG = 0x1,
};
-static unsigned vhost_zcopy_mask __read_mostly;
-
#define vhost_used_event(vq) ((u16 __user *)&vq->avail->ring[vq->num])
#define vhost_avail_event(vq) ((u16 __user *)&vq->used->ring[vq->num])
@@ -191,9 +189,6 @@
vq->call_ctx = NULL;
vq->call = NULL;
vq->log_ctx = NULL;
- vq->upend_idx = 0;
- vq->done_idx = 0;
- vq->ubufs = NULL;
}
static int vhost_worker(void *data)
@@ -253,20 +248,12 @@
vq->log = NULL;
kfree(vq->heads);
vq->heads = NULL;
- kfree(vq->ubuf_info);
- vq->ubuf_info = NULL;
-}
-
-void vhost_enable_zcopy(int vq)
-{
- vhost_zcopy_mask |= 0x1 << vq;
}
/* Helper to allocate iovec buffers for all vqs. */
static long vhost_dev_alloc_iovecs(struct vhost_dev *dev)
{
int i;
- bool zcopy;
for (i = 0; i < dev->nvqs; ++i) {
dev->vqs[i]->indirect = kmalloc(sizeof *dev->vqs[i]->indirect *
@@ -275,14 +262,8 @@
GFP_KERNEL);
dev->vqs[i]->heads = kmalloc(sizeof *dev->vqs[i]->heads *
UIO_MAXIOV, GFP_KERNEL);
- zcopy = vhost_zcopy_mask & (0x1 << i);
- if (zcopy)
- dev->vqs[i]->ubuf_info =
- kmalloc(sizeof *dev->vqs[i]->ubuf_info *
- UIO_MAXIOV, GFP_KERNEL);
if (!dev->vqs[i]->indirect || !dev->vqs[i]->log ||
- !dev->vqs[i]->heads ||
- (zcopy && !dev->vqs[i]->ubuf_info))
+ !dev->vqs[i]->heads)
goto err_nomem;
}
return 0;
@@ -321,7 +302,6 @@
dev->vqs[i]->log = NULL;
dev->vqs[i]->indirect = NULL;
dev->vqs[i]->heads = NULL;
- dev->vqs[i]->ubuf_info = NULL;
dev->vqs[i]->dev = dev;
mutex_init(&dev->vqs[i]->mutex);
vhost_vq_reset(dev, dev->vqs[i]);
@@ -1551,38 +1531,3 @@
&vq->used->flags, r);
}
}
-
-static void vhost_zerocopy_done_signal(struct kref *kref)
-{
- struct vhost_ubuf_ref *ubufs = container_of(kref, struct vhost_ubuf_ref,
- kref);
- wake_up(&ubufs->wait);
-}
-
-struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
- bool zcopy)
-{
- struct vhost_ubuf_ref *ubufs;
- /* No zero copy backend? Nothing to count. */
- if (!zcopy)
- return NULL;
- ubufs = kmalloc(sizeof *ubufs, GFP_KERNEL);
- if (!ubufs)
- return ERR_PTR(-ENOMEM);
- kref_init(&ubufs->kref);
- init_waitqueue_head(&ubufs->wait);
- ubufs->vq = vq;
- return ubufs;
-}
-
-void vhost_ubuf_put(struct vhost_ubuf_ref *ubufs)
-{
- kref_put(&ubufs->kref, vhost_zerocopy_done_signal);
-}
-
-void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *ubufs)
-{
- kref_put(&ubufs->kref, vhost_zerocopy_done_signal);
- wait_event(ubufs->wait, !atomic_read(&ubufs->kref.refcount));
- kfree(ubufs);
-}