drm/nouveau/gr: add fini() hook

Add a fini() hook to the GR engine. This will be used by gf100+ to
properly release the FECS and GPCCS falcons.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/gr/base.c

@@ -106,6 +106,15 @@ nvkm_gr_init(struct nvkm_engine *engine)
 	return gr->func->init(gr);
 }
 
+static int
+nvkm_gr_fini(struct nvkm_engine *engine, bool suspend)
+{
+	struct nvkm_gr *gr = nvkm_gr(engine);
+	if (gr->func->fini)
+		return gr->func->fini(gr, suspend);
+	return 0;
+}
+
 static void *
 nvkm_gr_dtor(struct nvkm_engine *engine)
 {
@@ -120,6 +129,7 @@ nvkm_gr = {
 	.dtor = nvkm_gr_dtor,
 	.oneinit = nvkm_gr_oneinit,
 	.init = nvkm_gr_init,
+	.fini = nvkm_gr_fini,
 	.intr = nvkm_gr_intr,
 	.tile = nvkm_gr_tile,
 	.fifo.cclass = nvkm_gr_cclass_new,

drivers/gpu/drm/nouveau/nvkm/engine/gr/priv.h

@@ -15,6 +15,7 @@ struct nvkm_gr_func {
 	void *(*dtor)(struct nvkm_gr *);
 	int (*oneinit)(struct nvkm_gr *);
 	int (*init)(struct nvkm_gr *);
+	int (*fini)(struct nvkm_gr *, bool);
 	void (*intr)(struct nvkm_gr *);
 	void (*tile)(struct nvkm_gr *, int region, struct nvkm_fb_tile *);
 	int (*tlb_flush)(struct nvkm_gr *);