drm/nouveau/bar/tu102-: prepare for GSP-RM

- (temporarily) disable if GSP-RM detected, will be added later
- move BAR2 teardown from dtor(), it doesn't belong there

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-7-skeggsb@gmail.com

Author: Ben Skeggs

drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c

@@ -93,8 +93,16 @@ static int
 nvkm_bar_fini(struct nvkm_subdev *subdev, bool suspend)
 {
 	struct nvkm_bar *bar = nvkm_bar(subdev);
+
+	if (!subdev->use.enabled)
+		return 0;
+
 	if (bar->func->bar1.fini)
 		bar->func->bar1.fini(bar);
+
+	if (!suspend) /* Handled by instmem. */
+		nvkm_bar_bar2_fini(subdev->device);
+
 	return 0;
 }
 
@@ -120,7 +128,7 @@ static void *
 nvkm_bar_dtor(struct nvkm_subdev *subdev)
 {
 	struct nvkm_bar *bar = nvkm_bar(subdev);
-	nvkm_bar_bar2_fini(subdev->device);
+
 	return bar->func->dtor(bar);
 }
 

drivers/gpu/drm/nouveau/nvkm/subdev/bar/tu102.c

@@ -22,6 +22,7 @@
 #include "gf100.h"
 
 #include <core/memory.h>
+#include <subdev/gsp.h>
 #include <subdev/timer.h>
 
 static void
@@ -95,5 +96,8 @@ int
 tu102_bar_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 	      struct nvkm_bar **pbar)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return -ENODEV;
+
 	return gf100_bar_new_(&tu102_bar, device, type, inst, pbar);
 }