[PATCH 4/7] drm/virtgpu: switch to using drm_exec

["Christian König" <ckoenig.leichtzumerken@xxxxxxxxx>]

Just a straightforward conversion without any optimization.

Only compile tested for now.

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Cc: David Airlie <airlied@xxxxxxxxxx>
Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx>
Cc: Chia-I Wu <olvaffe@xxxxxxxxx>
Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
---
 drivers/gpu/drm/virtio/Kconfig       |  1 +
 drivers/gpu/drm/virtio/virtgpu_drv.h |  3 ++-
 drivers/gpu/drm/virtio/virtgpu_gem.c | 28 +++++-----------------------
 3 files changed, 8 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/virtio/Kconfig b/drivers/gpu/drm/virtio/Kconfig
index ea06ff2aa4b4..a24a1ce5e666 100644
--- a/drivers/gpu/drm/virtio/Kconfig
+++ b/drivers/gpu/drm/virtio/Kconfig
@@ -5,6 +5,7 @@ config DRM_VIRTIO_GPU
 	select VIRTIO
 	select DRM_KMS_HELPER
 	select DRM_GEM_SHMEM_HELPER
+	select DRM_EXEC
 	select VIRTIO_DMA_SHARED_BUFFER
 	help
 	   This is the virtual GPU driver for virtio.  It can be used with
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 4126c384286b..cb5d9218a3ab 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -35,6 +35,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_encoder.h>
+#include <drm/drm_exec.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem.h>
@@ -116,7 +117,7 @@ struct virtio_gpu_object_vram {
 	container_of((virtio_gpu_object), struct virtio_gpu_object_vram, base)
 
 struct virtio_gpu_object_array {
-	struct ww_acquire_ctx ticket;
+	struct drm_exec exec;
 	struct list_head next;
 	u32 nents, total;
 	struct drm_gem_object *objs[];
diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 7db48d17ee3a..bb7928e7b3b6 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -171,6 +171,7 @@ struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
 
 	objs->nents = 0;
 	objs->total = nents;
+	drm_exec_init(&objs->exec, DRM_EXEC_INTERRUPTIBLE_WAIT);
 	return objs;
 }
 
@@ -214,36 +215,17 @@ void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
 
 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
 {
-	unsigned int i;
 	int ret;
 
-	if (objs->nents == 1) {
-		ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
-	} else {
-		ret = drm_gem_lock_reservations(objs->objs, objs->nents,
-						&objs->ticket);
-	}
-	if (ret)
-		return ret;
-
-	for (i = 0; i < objs->nents; ++i) {
-		ret = dma_resv_reserve_fences(objs->objs[i]->resv, 1);
-		if (ret) {
-			virtio_gpu_array_unlock_resv(objs);
-			return ret;
-		}
-	}
+	drm_exec_until_all_locked(&objs->exec)
+		ret = drm_exec_prepare_array(&objs->exec, objs->objs,
+					     objs->nents, 1);
 	return ret;
 }
 
 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
 {
-	if (objs->nents == 1) {
-		dma_resv_unlock(objs->objs[0]->resv);
-	} else {
-		drm_gem_unlock_reservations(objs->objs, objs->nents,
-					    &objs->ticket);
-	}
+	drm_exec_fini(&objs->exec);
 }
 
 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
-- 
2.34.1