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virtio-gpu: add locking for vbuf pool 

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Dave Airlie 2015-06-16 15:42:13 +10:00 committed by Gerd Hoffmann
parent 441012aff6
commit d5084f1711
2 changed files with 8 additions and 0 deletions
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1
drivers/gpu/drm/virtio/virtgpu_drv.h
View File

@ -162,6 +162,7 @@ struct virtio_gpu_device {
struct virtio_gpu_queue ctrlq;
struct virtio_gpu_queue cursorq;
struct list_head free_vbufs;
spinlock_t free_vbufs_lock;
void *vbufs;
bool vqs_ready;

7
drivers/gpu/drm/virtio/virtgpu_vq.c
View File

@ -79,6 +79,7 @@ int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev)
void *ptr;
INIT_LIST_HEAD(&vgdev->free_vbufs);
spin_lock_init(&vgdev->free_vbufs_lock);
count += virtqueue_get_vring_size(vgdev->ctrlq.vq);
count += virtqueue_get_vring_size(vgdev->cursorq.vq);
size = count * VBUFFER_SIZE;
@ -106,6 +107,7 @@ void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)
count += virtqueue_get_vring_size(vgdev->ctrlq.vq);
count += virtqueue_get_vring_size(vgdev->cursorq.vq);
spin_lock(&vgdev->free_vbufs_lock);
for (i = 0; i < count; i++) {
if (WARN_ON(list_empty(&vgdev->free_vbufs)))
return;
@ -113,6 +115,7 @@ void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)
struct virtio_gpu_vbuffer, list);
list_del(&vbuf->list);
}
spin_unlock(&vgdev->free_vbufs_lock);
kfree(vgdev->vbufs);
}
@ -123,10 +126,12 @@ virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev,
{
struct virtio_gpu_vbuffer *vbuf;
spin_lock(&vgdev->free_vbufs_lock);
BUG_ON(list_empty(&vgdev->free_vbufs));
vbuf = list_first_entry(&vgdev->free_vbufs,
struct virtio_gpu_vbuffer, list);
list_del(&vbuf->list);
spin_unlock(&vgdev->free_vbufs_lock);
memset(vbuf, 0, VBUFFER_SIZE);
BUG_ON(size > MAX_INLINE_CMD_SIZE);
@ -201,7 +206,9 @@ static void free_vbuf(struct virtio_gpu_device *vgdev,
if (vbuf->resp_size > MAX_INLINE_RESP_SIZE)
kfree(vbuf->resp_buf);
kfree(vbuf->data_buf);
spin_lock(&vgdev->free_vbufs_lock);
list_add(&vbuf->list, &vgdev->free_vbufs);
spin_unlock(&vgdev->free_vbufs_lock);
}
static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list)