#include <linux/kthread.h>
#include <linux/cgroup.h>
-#include <linux/net.h>
-#include <linux/if_packet.h>
-#include <linux/if_arp.h>
-
#include "vhost.h"
enum {
return 0;
}
-/* In case of DMA done not in order in lower device driver for some reason.
- * upend_idx is used to track end of used idx, done_idx is used to track head
- * of used idx. Once lower device DMA done contiguously, we will signal KVM
- * guest used idx.
- */
-int vhost_zerocopy_signal_used(struct vhost_virtqueue *vq)
+void vhost_dev_stop(struct vhost_dev *dev)
{
int i;
- int j = 0;
-
- for (i = vq->done_idx; i != vq->upend_idx; i = (i + 1) % UIO_MAXIOV) {
- if ((vq->heads[i].len == VHOST_DMA_DONE_LEN)) {
- vq->heads[i].len = VHOST_DMA_CLEAR_LEN;
- vhost_add_used_and_signal(vq->dev, vq,
- vq->heads[i].id, 0);
- ++j;
- } else
- break;
+
+ for (i = 0; i < dev->nvqs; ++i) {
+ if (dev->vqs[i].kick && dev->vqs[i].handle_kick) {
+ vhost_poll_stop(&dev->vqs[i].poll);
+ vhost_poll_flush(&dev->vqs[i].poll);
+ }
}
- if (j)
- vq->done_idx = i;
- return j;
}
/* Caller should have device mutex if and only if locked is set */
int i;
for (i = 0; i < dev->nvqs; ++i) {
- if (dev->vqs[i].kick && dev->vqs[i].handle_kick) {
- vhost_poll_stop(&dev->vqs[i].poll);
- vhost_poll_flush(&dev->vqs[i].poll);
- }
- /* Wait for all lower device DMAs done. */
- if (dev->vqs[i].ubufs)
- vhost_ubuf_put_and_wait(dev->vqs[i].ubufs);
-
- /* Signal guest as appropriate. */
- vhost_zerocopy_signal_used(&dev->vqs[i]);
-
if (dev->vqs[i].error_ctx)
eventfd_ctx_put(dev->vqs[i].error_ctx);
if (dev->vqs[i].error)
return 0;
}
-static long vhost_set_vring(struct vhost_dev *d, int ioctl, void __user *argp)
+long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp)
{
struct file *eventfp, *filep = NULL;
bool pollstart = false, pollstop = false;
}
/* Caller must have device mutex */
-long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, unsigned long arg)
+long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
{
- void __user *argp = (void __user *)arg;
struct file *eventfp, *filep = NULL;
struct eventfd_ctx *ctx = NULL;
u64 p;
fput(filep);
break;
default:
- r = vhost_set_vring(d, ioctl, argp);
+ r = -ENOIOCTLCMD;
break;
}
done:
wait_event(ubufs->wait, !atomic_read(&ubufs->kref.refcount));
kfree(ubufs);
}
-
-void vhost_zerocopy_callback(struct ubuf_info *ubuf)
-{
- struct vhost_ubuf_ref *ubufs = ubuf->ctx;
- struct vhost_virtqueue *vq = ubufs->vq;
-
- vhost_poll_queue(&vq->poll);
- /* set len = 1 to mark this desc buffers done DMA */
- vq->heads[ubuf->desc].len = VHOST_DMA_DONE_LEN;
- kref_put(&ubufs->kref, vhost_zerocopy_done_signal);
-}