[PATCH 1/3] drm/virtio: random virtgpu_drv.h cleanups

[PATCH 1/3] drm/virtio: random virtgpu_drv.h cleanups

[Gurchetan Singh]

- Static-ify virtio_gpu_gem_create
- Delete unused prototypes
- Point to current implementation files

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
---
 drivers/gpu/drm/virtio/virtgpu_drv.h | 26 +++++++++-----------------
 drivers/gpu/drm/virtio/virtgpu_gem.c | 10 +++++-----
 2 files changed, 14 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 824f9f15926c..79ad176aca5a 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -218,26 +218,18 @@ struct virtio_gpu_fpriv {
 	struct mutex context_lock;
 };
 
-/* virtio_ioctl.c */
+/* virtgpu_ioctl.c */
 #define DRM_VIRTIO_NUM_IOCTLS 10
 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];
 
-/* virtio_kms.c */
+/* virtgpu_kms.c */
 int virtio_gpu_init(struct drm_device *dev);
 void virtio_gpu_deinit(struct drm_device *dev);
 void virtio_gpu_release(struct drm_device *dev);
 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);
 
-/* virtio_gem.c */
-void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
-int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
-void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
-int virtio_gpu_gem_create(struct drm_file *file,
-			  struct drm_device *dev,
-			  struct virtio_gpu_object_params *params,
-			  struct drm_gem_object **obj_p,
-			  uint32_t *handle_p);
+/* virtgpu_gem.c */
 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 			       struct drm_file *file);
 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
@@ -263,7 +255,7 @@ void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
 				       struct virtio_gpu_object_array *objs);
 void virtio_gpu_array_put_free_work(struct work_struct *work);
 
-/* virtio vg */
+/* virtgpu_vq.c */
 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
@@ -343,17 +335,17 @@ void virtio_gpu_dequeue_fence_func(struct work_struct *work);
 
 void virtio_gpu_notify(struct virtio_gpu_device *vgdev);
 
-/* virtio_gpu_display.c */
+/* virtgpu_display.c */
 void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
 
-/* virtio_gpu_plane.c */
+/* virtgpu_plane.c */
 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc);
 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 					enum drm_plane_type type,
 					int index);
 
-/* virtio_gpu_fence.c */
+/* virtgpu_fence.c */
 struct virtio_gpu_fence *virtio_gpu_fence_alloc(
 	struct virtio_gpu_device *vgdev);
 void virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
@@ -362,7 +354,7 @@ void virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
 				    u64 last_seq);
 
-/* virtio_gpu_object */
+/* virtgpu_object.c */
 void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo);
 struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
 						size_t size);
@@ -378,7 +370,7 @@ struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
 	struct drm_device *dev, struct dma_buf_attachment *attach,
 	struct sg_table *sgt);
 
-/* virgl debugfs */
+/* virtgpu_debugfs.c */
 void virtio_gpu_debugfs_init(struct drm_minor *minor);
 
 #endif
diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 0d6152c99a27..90c0a8ea1708 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -28,11 +28,11 @@
 
 #include "virtgpu_drv.h"
 
-int virtio_gpu_gem_create(struct drm_file *file,
-			  struct drm_device *dev,
-			  struct virtio_gpu_object_params *params,
-			  struct drm_gem_object **obj_p,
-			  uint32_t *handle_p)
+static int virtio_gpu_gem_create(struct drm_file *file,
+				 struct drm_device *dev,
+				 struct virtio_gpu_object_params *params,
+				 struct drm_gem_object **obj_p,
+				 uint32_t *handle_p)
 {
 	struct virtio_gpu_device *vgdev = dev->dev_private;
 	struct virtio_gpu_object *obj;
-- 
2.25.1.696.g5e7596f4ac-goog

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[PATCH 2/3] drm/virtio: delete notify after virtio_gpu_cmd_context_create

[Gurchetan Singh]

The first 3D ioctl will take care of notification.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 336cc9143205..867c5e239d55 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -47,7 +47,6 @@ static void virtio_gpu_create_context(struct drm_device *dev,
 	get_task_comm(dbgname, current);
 	virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id,
 				      strlen(dbgname), dbgname);
-	virtio_gpu_notify(vgdev);
 	vfpriv->context_created = true;
 
 out_unlock:
-- 
2.25.1.696.g5e7596f4ac-goog

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[PATCH 3/3] drm/virtio: delete notify in virtio_gpu_object_create

[Gurchetan Singh]

- For dumb buffers, virtio_gpu_gem_create can notify.
- For 3D buffers, virtio_gpu_gem_object_open can notify.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
---
 drivers/gpu/drm/virtio/virtgpu_gem.c    | 1 +
 drivers/gpu/drm/virtio/virtgpu_object.c | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 90c0a8ea1708..aa14dd12928e 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -49,6 +49,7 @@ static int virtio_gpu_gem_create(struct drm_file *file,
 		return ret;
 	}
 
+	virtio_gpu_notify(vgdev);
 	*obj_p = &obj->base.base;
 
 	/* drop reference from allocate - handle holds it now */
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index d9039bb7c5e3..51a8da7d5ef3 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -241,7 +241,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 		return ret;
 	}
 
-	virtio_gpu_notify(vgdev);
 	*bo_ptr = bo;
 	return 0;
 
-- 
2.25.1.696.g5e7596f4ac-goog

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Re: [PATCH 3/3] drm/virtio: delete notify in virtio_gpu_object_create

[Chia-I Wu]

On Wed, Mar 25, 2020 at 12:44 AM Gurchetan Singh
<gurchetansingh@chromium.org> wrote:
>
> - For dumb buffers, virtio_gpu_gem_create can notify.
> - For 3D buffers, virtio_gpu_gem_object_open can notify.
Hmm, I feel this is a bit complex.  virtio_gpu_gem_object_open may not
notify, and the caller needs to know about it.

Can we change it to virtio_gpu_object_create never notifies and
virtio_gpu_gem_object_open always notifies?

>
> Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
> ---
>  drivers/gpu/drm/virtio/virtgpu_gem.c    | 1 +
>  drivers/gpu/drm/virtio/virtgpu_object.c | 1 -
>  2 files changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
> index 90c0a8ea1708..aa14dd12928e 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_gem.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
> @@ -49,6 +49,7 @@ static int virtio_gpu_gem_create(struct drm_file *file,
>                 return ret;
>         }
>
> +       virtio_gpu_notify(vgdev);
>         *obj_p = &obj->base.base;
>
>         /* drop reference from allocate - handle holds it now */
> diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
> index d9039bb7c5e3..51a8da7d5ef3 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_object.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_object.c
> @@ -241,7 +241,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
>                 return ret;
>         }
>
> -       virtio_gpu_notify(vgdev);
>         *bo_ptr = bo;
>         return 0;
>
> --
> 2.25.1.696.g5e7596f4ac-goog
>
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> dri-devel@lists.freedesktop.org
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[PATCH] drm/virtio: delete notify in virtio_gpu_object_create

[Gurchetan Singh]

For 3D buffers, virtio_gpu_gem_object_open notifies.
We can have the same behavior for dumb buffer.  We just
need to make sure the first open notifies the host for
dumb buffers.

v2: virtio_gpu_gem_object_open always notifies

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
---
 drivers/gpu/drm/virtio/virtgpu_drv.h    |  1 +
 drivers/gpu/drm/virtio/virtgpu_gem.c    | 10 ++++++++--
 drivers/gpu/drm/virtio/virtgpu_object.c |  1 -
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 79ad176aca5a8..842200e01d785 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -71,6 +71,7 @@ struct virtio_gpu_object {
 	uint32_t hw_res_handle;
 	bool dumb;
 	bool created;
+	bool notified;
 };
 #define gem_to_virtio_gpu_obj(gobj) \
 	container_of((gobj), struct virtio_gpu_object, base.base)
diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 90c0a8ea1708c..597ddb7391fb9 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -111,10 +111,13 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 {
 	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
+	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
 	struct virtio_gpu_object_array *objs;
 
-	if (!vgdev->has_virgl_3d)
-		return 0;
+	if (!vgdev->has_virgl_3d && !bo->notified)
+		goto out_notify;
+	else if (!vgdev->has_virgl_3d)
+		goto out;
 
 	objs = virtio_gpu_array_alloc(1);
 	if (!objs)
@@ -123,7 +126,10 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 
 	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
 					       objs);
+out_notify:
+	bo->notified = true;
 	virtio_gpu_notify(vgdev);
+out:
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index d9039bb7c5e37..51a8da7d5ef3b 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -241,7 +241,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 		return ret;
 	}
 
-	virtio_gpu_notify(vgdev);
 	*bo_ptr = bo;
 	return 0;
 
-- 
2.24.1

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Re: [PATCH] drm/virtio: delete notify in virtio_gpu_object_create

[Chia-I Wu]

On Wed, Mar 25, 2020 at 8:41 AM Gurchetan Singh
<gurchetansingh@chromium.org> wrote:
>
> For 3D buffers, virtio_gpu_gem_object_open notifies.
> We can have the same behavior for dumb buffer.  We just
> need to make sure the first open notifies the host for
> dumb buffers.
virtio_gpu_notify is cheap and does not kick unless there is a need.
I probably won't bother with adding `bool notified', which adds a
(harmless) data race.




>
> v2: virtio_gpu_gem_object_open always notifies
>
> Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
> ---
>  drivers/gpu/drm/virtio/virtgpu_drv.h    |  1 +
>  drivers/gpu/drm/virtio/virtgpu_gem.c    | 10 ++++++++--
>  drivers/gpu/drm/virtio/virtgpu_object.c |  1 -
>  3 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
> index 79ad176aca5a8..842200e01d785 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_drv.h
> +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
> @@ -71,6 +71,7 @@ struct virtio_gpu_object {
>         uint32_t hw_res_handle;
>         bool dumb;
>         bool created;
> +       bool notified;
>  };
>  #define gem_to_virtio_gpu_obj(gobj) \
>         container_of((gobj), struct virtio_gpu_object, base.base)
> diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
> index 90c0a8ea1708c..597ddb7391fb9 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_gem.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
> @@ -111,10 +111,13 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
>  {
>         struct virtio_gpu_device *vgdev = obj->dev->dev_private;
>         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
> +       struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
>         struct virtio_gpu_object_array *objs;
>
> -       if (!vgdev->has_virgl_3d)
> -               return 0;
> +       if (!vgdev->has_virgl_3d && !bo->notified)
> +               goto out_notify;
> +       else if (!vgdev->has_virgl_3d)
> +               goto out;
>
>         objs = virtio_gpu_array_alloc(1);
>         if (!objs)
> @@ -123,7 +126,10 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
>
>         virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
>                                                objs);
> +out_notify:
> +       bo->notified = true;
>         virtio_gpu_notify(vgdev);
> +out:
>         return 0;
>  }
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
> index d9039bb7c5e37..51a8da7d5ef3b 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_object.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_object.c
> @@ -241,7 +241,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
>                 return ret;
>         }
>
> -       virtio_gpu_notify(vgdev);
>         *bo_ptr = bo;
>         return 0;
>
> --
> 2.24.1
>
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[PATCH] drm/virtio: delete notify in virtio_gpu_object_create

[Gurchetan Singh]

For 3D buffers, virtio_gpu_gem_object_open notifies.
We can have the same behavior for dumb buffer.

v2: virtio_gpu_gem_object_open always notifies
v3: avoid boolean variable

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
---
 drivers/gpu/drm/virtio/virtgpu_gem.c    | 3 ++-
 drivers/gpu/drm/virtio/virtgpu_object.c | 1 -
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 90c0a8ea1708c..1025658be4df2 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -114,7 +114,7 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 	struct virtio_gpu_object_array *objs;
 
 	if (!vgdev->has_virgl_3d)
-		return 0;
+		goto out_notify;
 
 	objs = virtio_gpu_array_alloc(1);
 	if (!objs)
@@ -123,6 +123,7 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 
 	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
 					       objs);
+out_notify:
 	virtio_gpu_notify(vgdev);
 	return 0;
 }
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index d9039bb7c5e37..51a8da7d5ef3b 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -241,7 +241,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 		return ret;
 	}
 
-	virtio_gpu_notify(vgdev);
 	*bo_ptr = bo;
 	return 0;
 
-- 
2.24.1

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Re: [PATCH] drm/virtio: delete notify in virtio_gpu_object_create

[Chia-I Wu]

On Thu, Mar 26, 2020 at 7:10 AM Gurchetan Singh
<gurchetansingh@chromium.org> wrote:
>
> For 3D buffers, virtio_gpu_gem_object_open notifies.
> We can have the same behavior for dumb buffer.
>
> v2: virtio_gpu_gem_object_open always notifies
> v3: avoid boolean variable
Series is

Reviewed-by: Chia-I Wu <olvaffe@gmail.com>

>
> Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
> ---
>  drivers/gpu/drm/virtio/virtgpu_gem.c    | 3 ++-
>  drivers/gpu/drm/virtio/virtgpu_object.c | 1 -
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
> index 90c0a8ea1708c..1025658be4df2 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_gem.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
> @@ -114,7 +114,7 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
>         struct virtio_gpu_object_array *objs;
>
>         if (!vgdev->has_virgl_3d)
> -               return 0;
> +               goto out_notify;
>
>         objs = virtio_gpu_array_alloc(1);
>         if (!objs)
> @@ -123,6 +123,7 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
>
>         virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
>                                                objs);
> +out_notify:
>         virtio_gpu_notify(vgdev);
>         return 0;
>  }
> diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
> index d9039bb7c5e37..51a8da7d5ef3b 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_object.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_object.c
> @@ -241,7 +241,6 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
>                 return ret;
>         }
>
> -       virtio_gpu_notify(vgdev);
>         *bo_ptr = bo;
>         return 0;
>
> --
> 2.24.1
>
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