drm/nouveau/core/object: plumb the unmap ioctl through

MMU will be using this for BAR mappings.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/core/object.h

@@ -32,6 +32,7 @@ struct nvkm_object_func {
 	int (*ntfy)(struct nvkm_object *, u32 mthd, struct nvkm_event **);
 	int (*map)(struct nvkm_object *, void *argv, u32 argc,
 		   enum nvkm_object_map *, u64 *addr, u64 *size);
+	int (*unmap)(struct nvkm_object *);
 	int (*rd08)(struct nvkm_object *, u64 addr, u8 *data);
 	int (*rd16)(struct nvkm_object *, u64 addr, u16 *data);
 	int (*rd32)(struct nvkm_object *, u64 addr, u32 *data);
@@ -58,6 +59,7 @@ int nvkm_object_mthd(struct nvkm_object *, u32 mthd, void *data, u32 size);
 int nvkm_object_ntfy(struct nvkm_object *, u32 mthd, struct nvkm_event **);
 int nvkm_object_map(struct nvkm_object *, void *argv, u32 argc,
 		    enum nvkm_object_map *, u64 *addr, u64 *size);
+int nvkm_object_unmap(struct nvkm_object *);
 int nvkm_object_rd08(struct nvkm_object *, u64 addr, u8  *data);
 int nvkm_object_rd16(struct nvkm_object *, u64 addr, u16 *data);
 int nvkm_object_rd32(struct nvkm_object *, u64 addr, u32 *data);

drivers/gpu/drm/nouveau/nvkm/core/ioctl.c

@@ -287,6 +287,7 @@ nvkm_ioctl_unmap(struct nvkm_client *client,
 	nvif_ioctl(object, "unmap size %d\n", size);
 	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
 		nvif_ioctl(object, "unmap\n");
+		ret = nvkm_object_unmap(object);
 	}
 
 	return ret;

drivers/gpu/drm/nouveau/nvkm/core/object.c

@@ -110,6 +110,14 @@ nvkm_object_map(struct nvkm_object *object, void *argv, u32 argc,
 	return -ENODEV;
 }
 
+int
+nvkm_object_unmap(struct nvkm_object *object)
+{
+	if (likely(object->func->unmap))
+		return object->func->unmap(object);
+	return -ENODEV;
+}
+
 int
 nvkm_object_rd08(struct nvkm_object *object, u64 addr, u8 *data)
 {
@@ -260,6 +268,7 @@ nvkm_object_dtor(struct nvkm_object *object)
 	}
 
 	nvif_debug(object, "destroy running...\n");
+	nvkm_object_unmap(object);
 	if (object->func->dtor)
 		data = object->func->dtor(object);
 	nvkm_engine_unref(&object->engine);

drivers/gpu/drm/nouveau/nvkm/core/oproxy.c

@@ -44,6 +44,12 @@ nvkm_oproxy_map(struct nvkm_object *object, void *argv, u32 argc,
 	return nvkm_object_map(oproxy->object, argv, argc, type, addr, size);
 }
 
+static int
+nvkm_oproxy_unmap(struct nvkm_object *object)
+{
+	return nvkm_object_unmap(nvkm_oproxy(object)->object);
+}
+
 static int
 nvkm_oproxy_rd08(struct nvkm_object *object, u64 addr, u8 *data)
 {
@@ -173,6 +179,7 @@ nvkm_oproxy_func = {
 	.mthd = nvkm_oproxy_mthd,
 	.ntfy = nvkm_oproxy_ntfy,
 	.map = nvkm_oproxy_map,
+	.unmap = nvkm_oproxy_unmap,
 	.rd08 = nvkm_oproxy_rd08,
 	.rd16 = nvkm_oproxy_rd16,
 	.rd32 = nvkm_oproxy_rd32,