drm/nouveau/nvif: remove support for userspace backends

The tools that used libnvkm no longer exist.
Signed-off-by: Ben Skeggs <bskeggs@nvidia.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240726043828.58966-15-bskeggs@nvidia.com

drivers/gpu/drm/nouveau/include/nvif/driver.h

@@ -21,7 +21,4 @@ int nvif_driver_init(const char *drv, const char *cfg, const char *dbg,
 		     const char *name, u64 device, struct nvif_client *);
 
 extern const struct nvif_driver nvif_driver_nvkm;
-extern const struct nvif_driver nvif_driver_drm;
-extern const struct nvif_driver nvif_driver_lib;
-extern const struct nvif_driver nvif_driver_null;
 #endif

drivers/gpu/drm/nouveau/nvif/driver.c

@@ -24,35 +24,17 @@
 #include <nvif/driver.h>
 #include <nvif/client.h>
 
-static const struct nvif_driver *
-nvif_driver[] = {
-#ifdef __KERNEL__
-	&nvif_driver_nvkm,
-#else
-	&nvif_driver_drm,
-	&nvif_driver_lib,
-	&nvif_driver_null,
-#endif
-	NULL
-};
-
 int
 nvif_driver_init(const char *drv, const char *cfg, const char *dbg,
 		 const char *name, u64 device, struct nvif_client *client)
 {
-	int ret = -EINVAL, i;
+	int ret;
+
+	client->driver = &nvif_driver_nvkm;
 
-	for (i = 0; (client->driver = nvif_driver[i]); i++) {
-		if (!drv || !strcmp(client->driver->name, drv)) {
-			ret = client->driver->init(name, device, cfg, dbg,
-						   &client->object.priv);
-			if (ret == 0)
-				break;
-			client->driver->fini(client->object.priv);
-		}
-	}
+	ret = client->driver->init(name, device, cfg, dbg, &client->object.priv);
+	if (ret)
+		return ret;
 
-	if (ret == 0)
-		ret = nvif_client_ctor(client, name, device, client);
-	return ret;
+	return nvif_client_ctor(client, name, device, client);
 }