gpu: nvgpu: Device nodes creation as default

This is creating GPU nodes by default.
If MIG enabled after probe then delete and recreate
the device nodes.

Bug 5084299

Change-Id: I9ce33e148ec13f29735db9d778f666dc02b64e66
Signed-off-by: Dinesh T <dt@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/3442428
(cherry picked from commit 5c59e4d3d5a7df6f49668995b62d7f67f57f0cc6)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/3456076
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>

drivers/gpu/nvgpu/os/linux/driver_common.c

@@ -1,18 +1,5 @@
-/*
+// SPDX-License-Identifier: GPL-2.0-only
- * Copyright (c) 2016-2024, NVIDIA CORPORATION.  All rights reserved.
+// SPDX-FileCopyrightText: Copyright (c) 2016-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
 
 #include <linux/reboot.h>
 #include <nvgpu/errata.h>
@@ -507,16 +494,10 @@ int nvgpu_probe(struct gk20a *g,
 	 */
 	nvgpu_read_support_gpu_tools(g);
 
-	/*
-	* TODO: While removing the legacy nodes the following condition
-	* need to be removed.
-	*/
-	if (platform->platform_chip_id == TEGRA_210) {
 	err = gk20a_user_nodes_init(dev);
 	if (err)
 		return err;
 	l->dev_nodes_created = true;
-	}
 
 	/*
 	 * Note that for runtime suspend to work the clocks have to be setup

drivers/gpu/nvgpu/os/linux/module.c

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-// SPDX-FileCopyrightText: Copyright (c) 2011-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-FileCopyrightText: Copyright (c) 2011-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 /*
  * GK20A Graphics
@@ -495,7 +495,9 @@ int gk20a_pm_finalize_poweron(struct device *dev)
 		goto done;
 	}
 
-	if (!l->dev_nodes_created) {
+	if ((!l->dev_nodes_created) ||
+			(nvgpu_grmgr_is_multi_gr_enabled(g))) {
+		gk20a_user_nodes_deinit(dev);
 		err = gk20a_user_nodes_init(dev);
 		if (err) {
 			goto done;

drivers/gpu/nvgpu/os/linux/vgpu/vgpu_common.c

@@ -1,19 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2023-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
 /*
  * Linux common code for legacy VGPU and VF
- *
- * Copyright (c) 2023, NVIDIA CORPORATION.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <linux/dma-mapping.h>
@@ -27,7 +16,7 @@
 #include <nvgpu/nvgpu_init.h>
 #include <nvgpu/regops.h>
 #include <nvgpu/soc.h>
-
+#include <nvgpu/grmgr.h>
 #include "vgpu_linux.h"
 #include "common/vgpu/ivc/comm_vgpu.h"
 #include "common/vgpu/init/init_vgpu.h"
@@ -167,7 +156,9 @@ int vgpu_pm_finalize_poweron(struct device *dev)
 	if (err)
 		goto done;
 
-	if (!l->dev_nodes_created) {
+	if ((!l->dev_nodes_created) ||
+			(nvgpu_grmgr_is_multi_gr_enabled(g))) {
+		gk20a_user_nodes_deinit(dev);
 		err = gk20a_user_nodes_init(dev);
 		if (err) {
 			goto done;