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

- disable MC completely when GSP-RM detected

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-17-skeggsb@gmail.com

Author: Ben Skeggs

drivers/gpu/drm/nouveau/nvkm/subdev/mc/ga100.c

@@ -21,6 +21,8 @@
  */
 #include "priv.h"
 
+#include <subdev/gsp.h>
+
 static void
 ga100_mc_device_disable(struct nvkm_mc *mc, u32 mask)
 {
@@ -72,5 +74,8 @@ ga100_mc = {
 int
 ga100_mc_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_mc **pmc)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return -ENODEV;
+
 	return nvkm_mc_new_(&ga100_mc, device, type, inst, pmc);
 }

drivers/gpu/drm/nouveau/nvkm/subdev/mc/gp100.c

@@ -23,6 +23,8 @@
  */
 #include "priv.h"
 
+#include <subdev/gsp.h>
+
 const struct nvkm_intr_data
 gp100_mc_intrs[] = {
 	{ NVKM_ENGINE_DISP    , 0, 0, 0x04000000, true },
@@ -98,5 +100,8 @@ gp100_mc = {
 int
 gp100_mc_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_mc **pmc)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return -ENODEV;
+
 	return nvkm_mc_new_(&gp100_mc, device, type, inst, pmc);
 }