diff options
author | Michael S. Tsirkin <mst@redhat.com> | 2012-11-01 09:16:46 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2012-11-02 21:29:58 -0400 |
commit | b211616d712551874db3ce0fb44196f6faad2c34 (patch) | |
tree | 3945dbbf5d533828e0e31396dfb3ae582ffb7fff /drivers/vhost/vhost.c | |
parent | c4fcb586c337f8b8de3a3d7ba8514eed03695f6e (diff) | |
download | linux-3.10-b211616d712551874db3ce0fb44196f6faad2c34.tar.gz linux-3.10-b211616d712551874db3ce0fb44196f6faad2c34.tar.bz2 linux-3.10-b211616d712551874db3ce0fb44196f6faad2c34.zip |
vhost: move -net specific code out
Zerocopy handling code is vhost-net specific.
Move it from vhost.c/vhost.h out to net.c
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/vhost/vhost.c')
-rw-r--r-- | drivers/vhost/vhost.c | 53 |
1 files changed, 7 insertions, 46 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 5affce32503..ef8f5988f85 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -26,10 +26,6 @@ #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 { @@ -414,28 +410,16 @@ long vhost_dev_reset_owner(struct vhost_dev *dev) 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 (VHOST_DMA_IS_DONE(vq->heads[i].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 */ @@ -444,17 +428,6 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) 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) @@ -1599,15 +1572,3 @@ void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *ubufs) wait_event(ubufs->wait, !atomic_read(&ubufs->kref.refcount)); kfree(ubufs); } - -void vhost_zerocopy_callback(struct ubuf_info *ubuf, int status) -{ - struct vhost_ubuf_ref *ubufs = ubuf->ctx; - struct vhost_virtqueue *vq = ubufs->vq; - - vhost_poll_queue(&vq->poll); - /* set len to mark this desc buffers done DMA */ - vq->heads[ubuf->desc].len = status ? - VHOST_DMA_FAILED_LEN : VHOST_DMA_DONE_LEN; - kref_put(&ubufs->kref, vhost_zerocopy_done_signal); -} |