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authorMichael S. Tsirkin <mst@redhat.com>2009-06-12 22:16:36 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-06-12 22:16:36 +0930
commitd2a7ddda9ffb1c8961abff6714b0f1eb925c120f (patch)
tree1090884fd260d042255255467367e4e6b6193e5d /drivers/lguest/lguest_device.c
parent9499f5e7ed5224c40706f0cec6542a9916bc7606 (diff)
virtio: find_vqs/del_vqs virtio operations
This replaces find_vq/del_vq with find_vqs/del_vqs virtio operations, and updates all drivers. This is needed for MSI support, because MSI needs to know the total number of vectors upfront. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (+ lguest/9p compile fixes)
Diffstat (limited to 'drivers/lguest/lguest_device.c')
-rw-r--r--drivers/lguest/lguest_device.c36
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 4babed899d5..e082cdac88b 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -313,6 +313,38 @@ static void lg_del_vq(struct virtqueue *vq)
kfree(lvq);
}
+static void lg_del_vqs(struct virtio_device *vdev)
+{
+ struct virtqueue *vq, *n;
+
+ list_for_each_entry_safe(vq, n, &vdev->vqs, list)
+ lg_del_vq(vq);
+}
+
+static int lg_find_vqs(struct virtio_device *vdev, unsigned nvqs,
+ struct virtqueue *vqs[],
+ vq_callback_t *callbacks[],
+ const char *names[])
+{
+ struct lguest_device *ldev = to_lgdev(vdev);
+ int i;
+
+ /* We must have this many virtqueues. */
+ if (nvqs > ldev->desc->num_vq)
+ return -ENOENT;
+
+ for (i = 0; i < nvqs; ++i) {
+ vqs[i] = lg_find_vq(vdev, i, callbacks[i], names[i]);
+ if (IS_ERR(vqs[i]))
+ goto error;
+ }
+ return 0;
+
+error:
+ lg_del_vqs(vdev);
+ return PTR_ERR(vqs[i]);
+}
+
/* The ops structure which hooks everything together. */
static struct virtio_config_ops lguest_config_ops = {
.get_features = lg_get_features,
@@ -322,8 +354,8 @@ static struct virtio_config_ops lguest_config_ops = {
.get_status = lg_get_status,
.set_status = lg_set_status,
.reset = lg_reset,
- .find_vq = lg_find_vq,
- .del_vq = lg_del_vq,
+ .find_vqs = lg_find_vqs,
+ .del_vqs = lg_del_vqs,
};
/* The root device for the lguest virtio devices. This makes them appear as