drm/gpuvm: add drm_gpuvm_flags to drm_gpuvm

Introduce flags for struct drm_gpuvm, this required by subsequent
commits.
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231108001259.15123-8-dakr@redhat.com

drivers/gpu/drm/drm_gpuvm.c

@@ -720,6 +720,7 @@ EXPORT_SYMBOL_GPL(drm_gpuvm_resv_object_alloc);
  * drm_gpuvm_init() - initialize a &drm_gpuvm
  * @gpuvm: pointer to the &drm_gpuvm to initialize
  * @name: the name of the GPU VA space
+ * @flags: the &drm_gpuvm_flags for this GPUVM
  * @drm: the &drm_device this VM resides in
  * @r_obj: the resv &drm_gem_object providing the GPUVM's common &dma_resv
  * @start_offset: the start offset of the GPU VA space
@@ -735,6 +736,7 @@ EXPORT_SYMBOL_GPL(drm_gpuvm_resv_object_alloc);
  */
 void
 drm_gpuvm_init(struct drm_gpuvm *gpuvm, const char *name,
+	       enum drm_gpuvm_flags flags,
 	       struct drm_device *drm,
 	       struct drm_gem_object *r_obj,
 	       u64 start_offset, u64 range,
@@ -745,6 +747,7 @@ drm_gpuvm_init(struct drm_gpuvm *gpuvm, const char *name,
 	INIT_LIST_HEAD(&gpuvm->rb.list);
 
 	gpuvm->name = name ? name : "unknown";
+	gpuvm->flags = flags;
 	gpuvm->ops = ops;
 	gpuvm->drm = drm;
 	gpuvm->r_obj = r_obj;

drivers/gpu/drm/nouveau/nouveau_uvmm.c

@@ -1828,7 +1828,7 @@ nouveau_uvmm_init(struct nouveau_uvmm *uvmm, struct nouveau_cli *cli,
 		goto out_unlock;
 	}
 
-	drm_gpuvm_init(&uvmm->base, cli->name, drm, r_obj,
+	drm_gpuvm_init(&uvmm->base, cli->name, 0, drm, r_obj,
 		       NOUVEAU_VA_SPACE_START,
 		       NOUVEAU_VA_SPACE_END,
 		       kernel_managed_addr, kernel_managed_size,

include/drm/drm_gpuvm.h

@@ -184,6 +184,16 @@ static inline bool drm_gpuva_invalidated(struct drm_gpuva *va)
 	return va->flags & DRM_GPUVA_INVALIDATED;
 }
 
+/**
+ * enum drm_gpuvm_flags - flags for struct drm_gpuvm
+ */
+enum drm_gpuvm_flags {
+	/**
+	 * @DRM_GPUVM_USERBITS: user defined bits
+	 */
+	DRM_GPUVM_USERBITS = BIT(0),
+};
+
 /**
  * struct drm_gpuvm - DRM GPU VA Manager
  *
@@ -202,6 +212,11 @@ struct drm_gpuvm {
 	 */
 	const char *name;
 
+	/**
+	 * @flags: the &drm_gpuvm_flags of this GPUVM
+	 */
+	enum drm_gpuvm_flags flags;
+
 	/**
 	 * @drm: the &drm_device this VM lives in
 	 */
@@ -252,6 +267,7 @@ struct drm_gpuvm {
 };
 
 void drm_gpuvm_init(struct drm_gpuvm *gpuvm, const char *name,
+		    enum drm_gpuvm_flags flags,
 		    struct drm_device *drm,
 		    struct drm_gem_object *r_obj,
 		    u64 start_offset, u64 range,