diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2019-08-29 12:32:51 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-09-04 06:54:09 +0200 |
| commit | da758d51968a88fc879bdbd16a0da4784499b5bb (patch) | |
| tree | f05e79b020ff3351ed0bf5ee10425496056a7307 /drivers/gpu/drm/virtio/virtgpu_ioctl.c | |
| parent | 98abe21d07c84e03fddceabb238c9d548e5d4ddf (diff) | |
drm/virtio: rework virtio_gpu_execbuffer_ioctl fencing
Rework fencing workflow, starting with virtio_gpu_execbuffer_ioctl.
Stop using ttm helpers, use the virtio_gpu_array_* helpers (which work
on the reservation objects directly) instead.
Also store the object array in struct virtio_gpu_vbuffer, so we
explicitly keep a reference of all buffers used instead of depending
on ttm_bo_put() checking whenever the object is actually idle before
releasing it.
New workflow:
(1) All gem objects needed by a command are added to a
virtio_gpu_object_array.
(2) All reservation objects will be locked (virtio_gpu_array_lock_resv).
(3) virtio_gpu_fence_emit() completes fence initialization.
(4) fence gets added to the objects, reservation objects are unlocked
(virtio_gpu_array_add_fence, virtio_gpu_array_unlock_resv).
(5) virtio command is submitted to the host.
(6) The completion callback (virtio_gpu_dequeue_ctrl_func)
will drop object references and free virtio_gpu_object_array.
v6: rewrite most of the patch.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190829103301.3539-9-kraxel@redhat.com
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_ioctl.c | 56 |
1 files changed, 18 insertions, 38 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 7f1775b9449e..61b1b55ec508 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -107,16 +107,11 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_virtgpu_execbuffer *exbuf = data; struct virtio_gpu_device *vgdev = dev->dev_private; struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv; - struct drm_gem_object *gobj; struct virtio_gpu_fence *out_fence; - struct virtio_gpu_object *qobj; int ret; uint32_t *bo_handles = NULL; void __user *user_bo_handles = NULL; - struct list_head validate_list; - struct ttm_validate_buffer *buflist = NULL; - int i; - struct ww_acquire_ctx ticket; + struct virtio_gpu_object_array *buflist = NULL; struct sync_file *sync_file; int in_fence_fd = exbuf->fence_fd; int out_fence_fd = -1; @@ -157,15 +152,10 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, return out_fence_fd; } - INIT_LIST_HEAD(&validate_list); if (exbuf->num_bo_handles) { - bo_handles = kvmalloc_array(exbuf->num_bo_handles, - sizeof(uint32_t), GFP_KERNEL); - buflist = kvmalloc_array(exbuf->num_bo_handles, - sizeof(struct ttm_validate_buffer), - GFP_KERNEL | __GFP_ZERO); - if (!bo_handles || !buflist) { + sizeof(uint32_t), GFP_KERNEL); + if (!bo_handles) { ret = -ENOMEM; goto out_unused_fd; } @@ -177,25 +167,21 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, goto out_unused_fd; } - for (i = 0; i < exbuf->num_bo_handles; i++) { - gobj = drm_gem_object_lookup(drm_file, bo_handles[i]); - if (!gobj) { - ret = -ENOENT; - goto out_unused_fd; - } - - qobj = gem_to_virtio_gpu_obj(gobj); - buflist[i].bo = &qobj->tbo; - - list_add(&buflist[i].head, &validate_list); + buflist = virtio_gpu_array_from_handles(drm_file, bo_handles, + exbuf->num_bo_handles); + if (!buflist) { + ret = -ENOENT; + goto out_unused_fd; } kvfree(bo_handles); bo_handles = NULL; } - ret = virtio_gpu_object_list_validate(&ticket, &validate_list); - if (ret) - goto out_free; + if (buflist) { + ret = virtio_gpu_array_lock_resv(buflist); + if (ret) + goto out_unused_fd; + } buf = memdup_user(u64_to_user_ptr(exbuf->command), exbuf->size); if (IS_ERR(buf)) { @@ -222,24 +208,18 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, } virtio_gpu_cmd_submit(vgdev, buf, exbuf->size, - vfpriv->ctx_id, out_fence); - - ttm_eu_fence_buffer_objects(&ticket, &validate_list, &out_fence->f); - - /* fence the command bo */ - virtio_gpu_unref_list(&validate_list); - kvfree(buflist); + vfpriv->ctx_id, buflist, out_fence); return 0; out_memdup: kfree(buf); out_unresv: - ttm_eu_backoff_reservation(&ticket, &validate_list); -out_free: - virtio_gpu_unref_list(&validate_list); + if (buflist) + virtio_gpu_array_unlock_resv(buflist); out_unused_fd: kvfree(bo_handles); - kvfree(buflist); + if (buflist) + virtio_gpu_array_put_free(buflist); if (out_fence_fd >= 0) put_unused_fd(out_fence_fd); |