drm/nouveau/ce: make use of nvkm_subdev.inst

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/ce/gf100.c

@@ -29,9 +29,7 @@
 static void
 gf100_ce_init(struct nvkm_falcon *ce)
 {
-	struct nvkm_device *device = ce->engine.subdev.device;
-	const int index = ce->engine.subdev.index - NVKM_ENGINE_CE0;
-	nvkm_wr32(device, ce->addr + 0x084, index);
+	nvkm_wr32(ce->engine.subdev.device, ce->addr + 0x084, ce->engine.subdev.inst);
 }
 
 static const struct nvkm_falcon_func

drivers/gpu/drm/nouveau/nvkm/engine/ce/gk104.c

@@ -58,9 +58,9 @@ gk104_ce_intr_launcherr(struct nvkm_engine *ce, const u32 base)
 void
 gk104_ce_intr(struct nvkm_engine *ce)
 {
-	const u32 base = (ce->subdev.index - NVKM_ENGINE_CE0) * 0x1000;
 	struct nvkm_subdev *subdev = &ce->subdev;
 	struct nvkm_device *device = subdev->device;
+	const u32 base = subdev->inst * 0x1000;
 	u32 mask = nvkm_rd32(device, 0x104904 + base);
 	u32 intr = nvkm_rd32(device, 0x104908 + base) & mask;
 	if (intr & 0x00000001) {

drivers/gpu/drm/nouveau/nvkm/engine/ce/gp100.c

@@ -59,9 +59,9 @@ gp100_ce_intr_launcherr(struct nvkm_engine *ce, const u32 base)
 void
 gp100_ce_intr(struct nvkm_engine *ce)
 {
-	const u32 base = (ce->subdev.index - NVKM_ENGINE_CE0) * 0x80;
 	struct nvkm_subdev *subdev = &ce->subdev;
 	struct nvkm_device *device = subdev->device;
+	const u32 base = subdev->inst * 0x80;
 	u32 mask = nvkm_rd32(device, 0x10440c + base);
 	u32 intr = nvkm_rd32(device, 0x104410 + base) & mask;
 	if (intr & 0x00000001) { //XXX: guess

drivers/gpu/drm/nouveau/nvkm/engine/ce/gt215.c

@@ -44,7 +44,7 @@ gt215_ce_intr(struct nvkm_falcon *ce, struct nvkm_fifo_chan *chan)
 {
 	struct nvkm_subdev *subdev = &ce->engine.subdev;
 	struct nvkm_device *device = subdev->device;
-	const u32 base = (subdev->index - NVKM_ENGINE_CE0) * 0x1000;
+	const u32 base = subdev->inst * 0x1000;
 	u32 ssta = nvkm_rd32(device, 0x104040 + base) & 0x0000ffff;
 	u32 addr = nvkm_rd32(device, 0x104040 + base) >> 16;
 	u32 mthd = (addr & 0x07ff) << 2;