drm/nouveau/drm/nv50-: remove allocation of sw class

Hasn't been required for a long time.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_dma.h

@@ -54,7 +54,6 @@ enum {
 
 	NvSub2D		= 3, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
 	NvSubCopy	= 4, /* DO NOT CHANGE - hardcoded for kepler gr fifo */
-	FermiSw		= 5, /* DO NOT CHANGE (well.. 6/7 will work...) */
 };
 
 /* Object handles - for stuff that's doesn't use handle == oclass. */

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -388,22 +388,19 @@ nouveau_accel_init(struct nouveau_drm *drm)
 		return;
 	}
 
+	if (device->info.family < NV_DEVICE_INFO_V0_TESLA) {
 		ret = nvif_object_init(&drm->channel->user, NVDRM_NVSW,
-			       nouveau_abi16_swclass(drm), NULL, 0, &drm->nvsw);
+				       nouveau_abi16_swclass(drm), NULL, 0,
+				       &drm->nvsw);
 		if (ret == 0) {
 			ret = RING_SPACE(drm->channel, 2);
 			if (ret == 0) {
-			if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
 				BEGIN_NV04(drm->channel, NvSubSw, 0, 1);
-				OUT_RING  (drm->channel, NVDRM_NVSW);
-			} else
-			if (device->info.family < NV_DEVICE_INFO_V0_KEPLER) {
-				BEGIN_NVC0(drm->channel, FermiSw, 0, 1);
-				OUT_RING  (drm->channel, 0x001f0000);
-			}
+				OUT_RING  (drm->channel, drm->nvsw.handle);
 			}
 
-		ret = nvif_notify_init(&drm->nvsw, nouveau_flip_complete,
+			ret = nvif_notify_init(&drm->nvsw,
+					       nouveau_flip_complete,
 					       false, NV04_NVSW_NTFY_UEVENT,
 					       NULL, 0, 0, &drm->flip);
 			if (ret == 0)
@@ -415,10 +412,11 @@ nouveau_accel_init(struct nouveau_drm *drm)
 		}
 
 		if (ret) {
-		NV_ERROR(drm, "failed to allocate software object, %d\n", ret);
+			NV_ERROR(drm, "failed to allocate sw class, %d\n", ret);
 			nouveau_accel_fini(drm);
 			return;
 		}
+	}
 
 	if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
 		ret = nvkm_gpuobj_new(nvxx_device(&drm->client.device), 32, 0,