drm/nouveau/bus: convert to new-style nvkm_subdev

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/bus.h

@@ -2,49 +2,23 @@
 #define __NVKM_BUS_H__
 #include <core/subdev.h>
 
-struct nvkm_bus_intr {
-	u32 stat;
-	u32 unit;
-};
-
 struct nvkm_bus {
+	const struct nvkm_bus_func *func;
 	struct nvkm_subdev subdev;
-	int (*hwsq_exec)(struct nvkm_bus *, u32 *, u32);
-	u32 hwsq_size;
 };
 
-static inline struct nvkm_bus *
-nvkm_bus(void *obj)
-{
-	return (void *)nvkm_subdev(obj, NVDEV_SUBDEV_BUS);
-}
-
-#define nvkm_bus_create(p, e, o, d)                                         \
-	nvkm_subdev_create_((p), (e), (o), 0, "PBUS", "master",             \
-			       sizeof(**d), (void **)d)
-#define nvkm_bus_destroy(p)                                                 \
-	nvkm_subdev_destroy(&(p)->subdev)
-#define nvkm_bus_init(p)                                                    \
-	nvkm_subdev_init_old(&(p)->subdev)
-#define nvkm_bus_fini(p, s)                                                 \
-	nvkm_subdev_fini_old(&(p)->subdev, (s))
-
-#define _nvkm_bus_dtor _nvkm_subdev_dtor
-#define _nvkm_bus_init _nvkm_subdev_init
-#define _nvkm_bus_fini _nvkm_subdev_fini
-
-extern struct nvkm_oclass *nv04_bus_oclass;
-extern struct nvkm_oclass *nv31_bus_oclass;
-extern struct nvkm_oclass *nv50_bus_oclass;
-extern struct nvkm_oclass *g94_bus_oclass;
-extern struct nvkm_oclass *gf100_bus_oclass;
-
 /* interface to sequencer */
 struct nvkm_hwsq;
-int  nvkm_hwsq_init(struct nvkm_bus *, struct nvkm_hwsq **);
+int  nvkm_hwsq_init(struct nvkm_subdev *, struct nvkm_hwsq **);
 int  nvkm_hwsq_fini(struct nvkm_hwsq **, bool exec);
 void nvkm_hwsq_wr32(struct nvkm_hwsq *, u32 addr, u32 data);
 void nvkm_hwsq_setf(struct nvkm_hwsq *, u8 flag, int data);
 void nvkm_hwsq_wait(struct nvkm_hwsq *, u8 flag, u8 data);
 void nvkm_hwsq_nsec(struct nvkm_hwsq *, u32 nsec);
+
+int nv04_bus_new(struct nvkm_device *, int, struct nvkm_bus **);
+int nv31_bus_new(struct nvkm_device *, int, struct nvkm_bus **);
+int nv50_bus_new(struct nvkm_device *, int, struct nvkm_bus **);
+int g94_bus_new(struct nvkm_device *, int, struct nvkm_bus **);
+int gf100_bus_new(struct nvkm_device *, int, struct nvkm_bus **);
 #endif

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

@@ -77,7 +77,7 @@ static const struct nvkm_device_chip
 nv4_chipset = {
 	.name = "NV04",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv04_devinit_new,
 //	.fb = nv04_fb_new,
@@ -97,7 +97,7 @@ static const struct nvkm_device_chip
 nv5_chipset = {
 	.name = "NV05",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv05_devinit_new,
 //	.fb = nv04_fb_new,
@@ -117,7 +117,7 @@ static const struct nvkm_device_chip
 nv10_chipset = {
 	.name = "NV10",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv10_devinit_new,
 //	.fb = nv10_fb_new,
@@ -136,7 +136,7 @@ static const struct nvkm_device_chip
 nv11_chipset = {
 	.name = "NV11",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv10_devinit_new,
 //	.fb = nv10_fb_new,
@@ -157,7 +157,7 @@ static const struct nvkm_device_chip
 nv15_chipset = {
 	.name = "NV15",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv10_devinit_new,
 //	.fb = nv10_fb_new,
@@ -178,7 +178,7 @@ static const struct nvkm_device_chip
 nv17_chipset = {
 	.name = "NV17",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv10_devinit_new,
 //	.fb = nv10_fb_new,
@@ -199,7 +199,7 @@ static const struct nvkm_device_chip
 nv18_chipset = {
 	.name = "NV18",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv10_devinit_new,
 //	.fb = nv10_fb_new,
@@ -220,7 +220,7 @@ static const struct nvkm_device_chip
 nv1a_chipset = {
 	.name = "nForce",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv1a_fb_new,
@@ -241,7 +241,7 @@ static const struct nvkm_device_chip
 nv1f_chipset = {
 	.name = "nForce2",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv1a_fb_new,
@@ -262,7 +262,7 @@ static const struct nvkm_device_chip
 nv20_chipset = {
 	.name = "NV20",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv20_fb_new,
@@ -283,7 +283,7 @@ static const struct nvkm_device_chip
 nv25_chipset = {
 	.name = "NV25",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv25_fb_new,
@@ -304,7 +304,7 @@ static const struct nvkm_device_chip
 nv28_chipset = {
 	.name = "NV28",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv25_fb_new,
@@ -325,7 +325,7 @@ static const struct nvkm_device_chip
 nv2a_chipset = {
 	.name = "NV2A",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv25_fb_new,
@@ -346,7 +346,7 @@ static const struct nvkm_device_chip
 nv30_chipset = {
 	.name = "NV30",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv30_fb_new,
@@ -367,7 +367,7 @@ static const struct nvkm_device_chip
 nv31_chipset = {
 	.name = "NV31",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv30_fb_new,
@@ -389,7 +389,7 @@ static const struct nvkm_device_chip
 nv34_chipset = {
 	.name = "NV34",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv10_devinit_new,
 //	.fb = nv10_fb_new,
@@ -411,7 +411,7 @@ static const struct nvkm_device_chip
 nv35_chipset = {
 	.name = "NV35",
 	.bios = nvkm_bios_new,
-//	.bus = nv04_bus_new,
+	.bus = nv04_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv35_fb_new,
@@ -432,7 +432,7 @@ static const struct nvkm_device_chip
 nv36_chipset = {
 	.name = "NV36",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv04_clk_new,
 //	.devinit = nv20_devinit_new,
 //	.fb = nv36_fb_new,
@@ -454,7 +454,7 @@ static const struct nvkm_device_chip
 nv40_chipset = {
 	.name = "NV40",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv40_fb_new,
@@ -479,7 +479,7 @@ static const struct nvkm_device_chip
 nv41_chipset = {
 	.name = "NV41",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv41_fb_new,
@@ -504,7 +504,7 @@ static const struct nvkm_device_chip
 nv42_chipset = {
 	.name = "NV42",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv41_fb_new,
@@ -529,7 +529,7 @@ static const struct nvkm_device_chip
 nv43_chipset = {
 	.name = "NV43",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv41_fb_new,
@@ -554,7 +554,7 @@ static const struct nvkm_device_chip
 nv44_chipset = {
 	.name = "NV44",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv44_fb_new,
@@ -579,7 +579,7 @@ static const struct nvkm_device_chip
 nv45_chipset = {
 	.name = "NV45",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv40_fb_new,
@@ -604,7 +604,7 @@ static const struct nvkm_device_chip
 nv46_chipset = {
 	.name = "G72",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv46_fb_new,
@@ -629,7 +629,7 @@ static const struct nvkm_device_chip
 nv47_chipset = {
 	.name = "G70",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv47_fb_new,
@@ -654,7 +654,7 @@ static const struct nvkm_device_chip
 nv49_chipset = {
 	.name = "G71",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv49_fb_new,
@@ -679,7 +679,7 @@ static const struct nvkm_device_chip
 nv4a_chipset = {
 	.name = "NV44A",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv44_fb_new,
@@ -704,7 +704,7 @@ static const struct nvkm_device_chip
 nv4b_chipset = {
 	.name = "G73",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv49_fb_new,
@@ -729,7 +729,7 @@ static const struct nvkm_device_chip
 nv4c_chipset = {
 	.name = "C61",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv46_fb_new,
@@ -754,7 +754,7 @@ static const struct nvkm_device_chip
 nv4e_chipset = {
 	.name = "C51",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv4e_fb_new,
@@ -780,7 +780,7 @@ nv50_chipset = {
 	.name = "G80",
 	.bar = nv50_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = nv50_bus_new,
+	.bus = nv50_bus_new,
 //	.clk = nv50_clk_new,
 //	.devinit = nv50_devinit_new,
 //	.fb = nv50_fb_new,
@@ -807,7 +807,7 @@ static const struct nvkm_device_chip
 nv63_chipset = {
 	.name = "C73",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv46_fb_new,
@@ -832,7 +832,7 @@ static const struct nvkm_device_chip
 nv67_chipset = {
 	.name = "C67",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv46_fb_new,
@@ -857,7 +857,7 @@ static const struct nvkm_device_chip
 nv68_chipset = {
 	.name = "C68",
 	.bios = nvkm_bios_new,
-//	.bus = nv31_bus_new,
+	.bus = nv31_bus_new,
 //	.clk = nv40_clk_new,
 //	.devinit = nv1a_devinit_new,
 //	.fb = nv46_fb_new,
@@ -883,7 +883,7 @@ nv84_chipset = {
 	.name = "G84",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = nv50_bus_new,
+	.bus = nv50_bus_new,
 //	.clk = g84_clk_new,
 //	.devinit = g84_devinit_new,
 //	.fb = g84_fb_new,
@@ -914,7 +914,7 @@ nv86_chipset = {
 	.name = "G86",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = nv50_bus_new,
+	.bus = nv50_bus_new,
 //	.clk = g84_clk_new,
 //	.devinit = g84_devinit_new,
 //	.fb = g84_fb_new,
@@ -945,7 +945,7 @@ nv92_chipset = {
 	.name = "G92",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = nv50_bus_new,
+	.bus = nv50_bus_new,
 //	.clk = g84_clk_new,
 //	.devinit = g84_devinit_new,
 //	.fb = g84_fb_new,
@@ -976,7 +976,7 @@ nv94_chipset = {
 	.name = "G94",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = g84_clk_new,
 //	.devinit = g84_devinit_new,
 //	.fb = g84_fb_new,
@@ -1014,7 +1014,7 @@ nv96_chipset = {
 //	.mxm = nv50_mxm_new,
 //	.devinit = g84_devinit_new,
 //	.mc = g94_mc_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.timer = nv04_timer_new,
 //	.fb = g84_fb_new,
 //	.imem = nv50_instmem_new,
@@ -1045,7 +1045,7 @@ nv98_chipset = {
 //	.mxm = nv50_mxm_new,
 //	.devinit = g98_devinit_new,
 //	.mc = g98_mc_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.timer = nv04_timer_new,
 //	.fb = g84_fb_new,
 //	.imem = nv50_instmem_new,
@@ -1069,7 +1069,7 @@ nva0_chipset = {
 	.name = "GT200",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = g84_clk_new,
 //	.devinit = g84_devinit_new,
 //	.fb = g84_fb_new,
@@ -1100,7 +1100,7 @@ nva3_chipset = {
 	.name = "GT215",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = gt215_clk_new,
 //	.devinit = gt215_devinit_new,
 //	.fb = gt215_fb_new,
@@ -1133,7 +1133,7 @@ nva5_chipset = {
 	.name = "GT216",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = gt215_clk_new,
 //	.devinit = gt215_devinit_new,
 //	.fb = gt215_fb_new,
@@ -1165,7 +1165,7 @@ nva8_chipset = {
 	.name = "GT218",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = gt215_clk_new,
 //	.devinit = gt215_devinit_new,
 //	.fb = gt215_fb_new,
@@ -1197,7 +1197,7 @@ nvaa_chipset = {
 	.name = "MCP77/MCP78",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = mcp77_clk_new,
 //	.devinit = g98_devinit_new,
 //	.fb = mcp77_fb_new,
@@ -1228,7 +1228,7 @@ nvac_chipset = {
 	.name = "MCP79/MCP7A",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = mcp77_clk_new,
 //	.devinit = g98_devinit_new,
 //	.fb = mcp77_fb_new,
@@ -1259,7 +1259,7 @@ nvaf_chipset = {
 	.name = "MCP89",
 	.bar = g84_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = g94_bus_new,
+	.bus = g94_bus_new,
 //	.clk = gt215_clk_new,
 //	.devinit = mcp89_devinit_new,
 //	.fb = mcp89_fb_new,
@@ -1291,7 +1291,7 @@ nvc0_chipset = {
 	.name = "GF100",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1326,7 +1326,7 @@ nvc1_chipset = {
 	.name = "GF108",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1360,7 +1360,7 @@ nvc3_chipset = {
 	.name = "GF106",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1394,7 +1394,7 @@ nvc4_chipset = {
 	.name = "GF104",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1429,7 +1429,7 @@ nvc8_chipset = {
 	.name = "GF110",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1464,7 +1464,7 @@ nvce_chipset = {
 	.name = "GF114",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1499,7 +1499,7 @@ nvcf_chipset = {
 	.name = "GF116",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1533,7 +1533,7 @@ nvd7_chipset = {
 	.name = "GF117",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1565,7 +1565,7 @@ nvd9_chipset = {
 	.name = "GF119",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gf100_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gf100_fb_new,
@@ -1599,7 +1599,7 @@ nve4_chipset = {
 	.name = "GK104",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1635,7 +1635,7 @@ nve6_chipset = {
 	.name = "GK106",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1671,7 +1671,7 @@ nve7_chipset = {
 	.name = "GK107",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1706,7 +1706,7 @@ static const struct nvkm_device_chip
 nvea_chipset = {
 	.name = "GK20A",
 	.bar = gk20a_bar_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk20a_clk_new,
 //	.fb = gk20a_fb_new,
 //	.fuse = gf100_fuse_new,
@@ -1731,7 +1731,7 @@ nvf0_chipset = {
 	.name = "GK110",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1767,7 +1767,7 @@ nvf1_chipset = {
 	.name = "GK110B",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1803,7 +1803,7 @@ nv106_chipset = {
 	.name = "GK208B",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1838,7 +1838,7 @@ nv108_chipset = {
 	.name = "GK208",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gf100_devinit_new,
 //	.fb = gk104_fb_new,
@@ -1873,7 +1873,7 @@ nv117_chipset = {
 	.name = "GM107",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.clk = gk104_clk_new,
 //	.devinit = gm107_devinit_new,
 //	.fb = gm107_fb_new,
@@ -1903,7 +1903,7 @@ nv124_chipset = {
 	.name = "GM204",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.devinit = gm204_devinit_new,
 //	.fb = gm107_fb_new,
 //	.fuse = gm107_fuse_new,
@@ -1932,7 +1932,7 @@ nv126_chipset = {
 	.name = "GM206",
 	.bar = gf100_bar_new,
 	.bios = nvkm_bios_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.devinit = gm204_devinit_new,
 //	.fb = gm107_fb_new,
 //	.fuse = gm107_fuse_new,
@@ -1960,7 +1960,7 @@ static const struct nvkm_device_chip
 nv12b_chipset = {
 	.name = "GM20B",
 	.bar = gk20a_bar_new,
-//	.bus = gf100_bus_new,
+	.bus = gf100_bus_new,
 //	.fb = gk20a_fb_new,
 //	.fuse = gm107_fuse_new,
 //	.ibus = gk20a_ibus_new,

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

@@ -36,7 +36,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf100_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -66,7 +65,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf100_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -96,7 +94,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -125,7 +122,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf100_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -155,7 +151,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -184,7 +179,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -213,7 +207,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf100_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -243,7 +236,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;
@@ -272,7 +264,6 @@ gf100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gf100_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gf100_ltc_oclass;

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

@@ -36,7 +36,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
@@ -67,7 +66,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
@@ -98,7 +96,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
@@ -123,7 +120,6 @@ gk104_identify(struct nvkm_device *device)
 	case 0xea:
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &gk20a_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_FUSE   ] = &gf100_fuse_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &gk20a_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk20a_fb_oclass;
@@ -149,7 +145,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
@@ -180,7 +175,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gf106_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
@@ -211,7 +205,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
@@ -241,7 +234,6 @@ gk104_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gf100_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk104_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c

@@ -36,7 +36,6 @@ gm100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gm107_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &gk20a_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gm107_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gm107_ltc_oclass;
@@ -77,7 +76,6 @@ gm100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gm204_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &gk20a_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gm107_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gm107_ltc_oclass;
@@ -115,7 +113,6 @@ gm100_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gm204_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &gk20a_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gm107_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_LTC    ] =  gm107_ltc_oclass;
@@ -144,7 +141,6 @@ gm100_identify(struct nvkm_device *device)
 
 		device->oclass[NVDEV_SUBDEV_MC     ] =  gk20a_mc_oclass;
 		device->oclass[NVDEV_SUBDEV_MMU    ] = &gf100_mmu_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  gf100_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_FUSE   ] = &gm107_fuse_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &gk20a_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gk20a_fb_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/nv04.c

@@ -32,7 +32,6 @@ nv04_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv04_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv04_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -48,7 +47,6 @@ nv04_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv05_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv04_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/nv10.c

@@ -33,7 +33,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -48,7 +47,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -65,7 +63,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -82,7 +79,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv1a_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -99,7 +95,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -116,7 +111,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -133,7 +127,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv1a_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -150,7 +143,6 @@ nv10_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/nv20.c

@@ -33,7 +33,6 @@ nv20_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv20_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -50,7 +49,6 @@ nv20_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv25_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -67,7 +65,6 @@ nv20_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv25_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -84,7 +81,6 @@ nv20_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv25_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/nv30.c

@@ -33,7 +33,6 @@ nv30_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv30_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -50,7 +49,6 @@ nv30_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv04_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv35_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -67,7 +65,6 @@ nv30_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv30_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -85,7 +82,6 @@ nv30_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv20_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv36_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;
@@ -103,7 +99,6 @@ nv30_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_CLK    ] = &nv04_clk_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv10_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv04_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv10_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv04_instmem_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/nv40.c

@@ -34,7 +34,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv40_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -55,7 +54,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv41_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -76,7 +74,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv41_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -97,7 +94,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv41_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -118,7 +114,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv40_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -139,7 +134,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv47_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -160,7 +154,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv49_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -181,7 +174,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv40_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv49_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -202,7 +194,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv44_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv44_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -223,7 +214,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv4c_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv46_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -244,7 +234,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv44_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv44_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -265,7 +254,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv4c_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv46_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -286,7 +274,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv4c_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv4e_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -307,7 +294,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv4c_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv46_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -328,7 +314,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv4c_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv46_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;
@@ -349,7 +334,6 @@ nv40_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_THERM  ] = &nv40_therm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv1a_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv4c_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv31_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv46_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv40_instmem_oclass;

drivers/gpu/drm/nouveau/nvkm/engine/device/nv50.c

@@ -36,7 +36,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  nv50_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv50_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv50_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  nv50_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -59,7 +58,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g84_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv50_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv50_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -85,7 +83,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g84_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv50_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv50_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -111,7 +108,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g84_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  nv50_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  nv50_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -137,7 +133,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g84_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g94_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -163,7 +158,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g84_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g94_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -189,7 +183,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g98_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -215,7 +208,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g84_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  g84_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -241,7 +233,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g98_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  mcp77_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -267,7 +258,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  g98_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  mcp77_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -293,7 +283,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gt215_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gt215_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -321,7 +310,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gt215_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gt215_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -348,7 +336,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  gt215_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  gt215_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
@@ -375,7 +362,6 @@ nv50_identify(struct nvkm_device *device)
 		device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
 		device->oclass[NVDEV_SUBDEV_DEVINIT] =  mcp89_devinit_oclass;
 		device->oclass[NVDEV_SUBDEV_MC     ] =  g98_mc_oclass;
-		device->oclass[NVDEV_SUBDEV_BUS    ] =  g94_bus_oclass;
 		device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
 		device->oclass[NVDEV_SUBDEV_FB     ] =  mcp89_fb_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;

drivers/gpu/drm/nouveau/nvkm/subdev/bus/Kbuild

+nvkm-y += nvkm/subdev/bus/base.o
 nvkm-y += nvkm/subdev/bus/hwsq.o
 nvkm-y += nvkm/subdev/bus/nv04.o
 nvkm-y += nvkm/subdev/bus/nv31.o

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

+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "priv.h"
+
+static void
+nvkm_bus_intr(struct nvkm_subdev *subdev)
+{
+	struct nvkm_bus *bus = nvkm_bus(subdev);
+	bus->func->intr(bus);
+}
+
+static int
+nvkm_bus_init(struct nvkm_subdev *subdev)
+{
+	struct nvkm_bus *bus = nvkm_bus(subdev);
+	bus->func->init(bus);
+	return 0;
+}
+
+static void *
+nvkm_bus_dtor(struct nvkm_subdev *subdev)
+{
+	return nvkm_bus(subdev);
+}
+
+static const struct nvkm_subdev_func
+nvkm_bus = {
+	.dtor = nvkm_bus_dtor,
+	.init = nvkm_bus_init,
+	.intr = nvkm_bus_intr,
+};
+
+int
+nvkm_bus_new_(const struct nvkm_bus_func *func, struct nvkm_device *device,
+	      int index, struct nvkm_bus **pbus)
+{
+	struct nvkm_bus *bus;
+	if (!(bus = *pbus = kzalloc(sizeof(*bus), GFP_KERNEL)))
+		return -ENOMEM;
+	nvkm_subdev_ctor(&nvkm_bus, device, index, 0, &bus->subdev);
+	bus->func = func;
+	return 0;
+}

drivers/gpu/drm/nouveau/nvkm/subdev/bus/g94.c

@@ -22,7 +22,7 @@
  * Authors: Martin Peres <martin.peres@labri.fr>
  *          Ben Skeggs
  */
-#include "nv04.h"
+#include "priv.h"
 
 #include <subdev/timer.h>
 
@@ -49,16 +49,16 @@ g94_bus_hwsq_exec(struct nvkm_bus *bus, u32 *data, u32 size)
 	return 0;
 }
 
-struct nvkm_oclass *
-g94_bus_oclass = &(struct nv04_bus_impl) {
-	.base.handle = NV_SUBDEV(BUS, 0x94),
-	.base.ofuncs = &(struct nvkm_ofuncs) {
-		.ctor = nv04_bus_ctor,
-		.dtor = _nvkm_bus_dtor,
-		.init = nv50_bus_init,
-		.fini = _nvkm_bus_fini,
-	},
+static const struct nvkm_bus_func
+g94_bus = {
+	.init = nv50_bus_init,
 	.intr = nv50_bus_intr,
 	.hwsq_exec = g94_bus_hwsq_exec,
 	.hwsq_size = 128,
-}.base;
+};
+
+int
+g94_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
+{
+	return nvkm_bus_new_(&g94_bus, device, index, pbus);
+}

drivers/gpu/drm/nouveau/nvkm/subdev/bus/gf100.c

@@ -22,11 +22,12 @@
  * Authors: Martin Peres <martin.peres@labri.fr>
  *          Ben Skeggs
  */
-#include "nv04.h"
+#include "priv.h"
 
 static void
-gf100_bus_intr(struct nvkm_subdev *subdev)
+gf100_bus_intr(struct nvkm_bus *bus)
 {
+	struct nvkm_subdev *subdev = &bus->subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
 
@@ -53,30 +54,22 @@ gf100_bus_intr(struct nvkm_subdev *subdev)
 	}
 }
 
-static int
-gf100_bus_init(struct nvkm_object *object)
+static void
+gf100_bus_init(struct nvkm_bus *bus)
 {
-	struct nvkm_bus *bus = (void *)object;
 	struct nvkm_device *device = bus->subdev.device;
-	int ret;
-
-	ret = nvkm_bus_init(bus);
-	if (ret)
-		return ret;
-
 	nvkm_wr32(device, 0x001100, 0xffffffff);
 	nvkm_wr32(device, 0x001140, 0x0000000e);
-	return 0;
 }
 
-struct nvkm_oclass *
-gf100_bus_oclass = &(struct nv04_bus_impl) {
-	.base.handle = NV_SUBDEV(BUS, 0xc0),
-	.base.ofuncs = &(struct nvkm_ofuncs) {
-		.ctor = nv04_bus_ctor,
-		.dtor = _nvkm_bus_dtor,
-		.init = gf100_bus_init,
-		.fini = _nvkm_bus_fini,
-	},
+static const struct nvkm_bus_func
+gf100_bus = {
+	.init = gf100_bus_init,
 	.intr = gf100_bus_intr,
-}.base;
+};
+
+int
+gf100_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
+{
+	return nvkm_bus_new_(&gf100_bus, device, index, pbus);
+}

drivers/gpu/drm/nouveau/nvkm/subdev/bus/hwsq.c

@@ -21,10 +21,10 @@
  *
  * Authors: Ben Skeggs <bskeggs@redhat.com>
  */
-#include <subdev/bus.h>
+#include "priv.h"
 
 struct nvkm_hwsq {
-	struct nvkm_bus *bus;
+	struct nvkm_subdev *subdev;
 	u32 addr;
 	u32 data;
 	struct {
@@ -41,13 +41,13 @@ hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[])
 }
 
 int
-nvkm_hwsq_init(struct nvkm_bus *bus, struct nvkm_hwsq **phwsq)
+nvkm_hwsq_init(struct nvkm_subdev *subdev, struct nvkm_hwsq **phwsq)
 {
 	struct nvkm_hwsq *hwsq;
 
 	hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL);
 	if (hwsq) {
-		hwsq->bus = bus;
+		hwsq->subdev = subdev;
 		hwsq->addr = ~0;
 		hwsq->data = ~0;
 		memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data));
@@ -63,13 +63,14 @@ nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec)
 	struct nvkm_hwsq *hwsq = *phwsq;
 	int ret = 0, i;
 	if (hwsq) {
-		struct nvkm_bus *bus = hwsq->bus;
-		struct nvkm_subdev *subdev = &bus->subdev;
+		struct nvkm_subdev *subdev = hwsq->subdev;
+		struct nvkm_bus *bus = subdev->device->bus;
 		hwsq->c.size = (hwsq->c.size + 4) / 4;
-		if (hwsq->c.size <= bus->hwsq_size) {
+		if (hwsq->c.size <= bus->func->hwsq_size) {
 			if (exec)
-				ret = bus->hwsq_exec(bus, (u32 *)hwsq->c.data,
-								 hwsq->c.size);
+				ret = bus->func->hwsq_exec(bus,
+							   (u32 *)hwsq->c.data,
+								  hwsq->c.size);
 			if (ret)
 				nvkm_error(subdev, "hwsq exec failed: %d\n", ret);
 		} else {
@@ -89,7 +90,7 @@ nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec)
 void
 nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data)
 {
-	nvkm_debug(&hwsq->bus->subdev, "R[%06x] = %08x\n", addr, data);
+	nvkm_debug(hwsq->subdev, "R[%06x] = %08x\n", addr, data);
 
 	if (hwsq->data != data) {
 		if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) {
@@ -114,7 +115,7 @@ nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data)
 void
 nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data)
 {
-	nvkm_debug(&hwsq->bus->subdev, " FLAG[%02x] = %d\n", flag, data);
+	nvkm_debug(hwsq->subdev, " FLAG[%02x] = %d\n", flag, data);
 	flag += 0x80;
 	if (data >= 0)
 		flag += 0x20;
@@ -126,7 +127,7 @@ nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data)
 void
 nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data)
 {
-	nvkm_debug(&hwsq->bus->subdev, " WAIT[%02x] = %d\n", flag, data);
+	nvkm_debug(hwsq->subdev, " WAIT[%02x] = %d\n", flag, data);
 	hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data });
 }
 
@@ -139,6 +140,6 @@ nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec)
 		shift++;
 	}
 
-	nvkm_debug(&hwsq->bus->subdev, "    DELAY = %d ns\n", nsec);
+	nvkm_debug(hwsq->subdev, "    DELAY = %d ns\n", nsec);
 	hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec });
 }

drivers/gpu/drm/nouveau/nvkm/subdev/bus/hwsq.h

@@ -59,10 +59,9 @@ hwsq_reg(u32 addr)
 static inline int
 hwsq_init(struct hwsq *ram, struct nvkm_subdev *subdev)
 {
-	struct nvkm_bus *bus = nvkm_bus(subdev);
 	int ret;
 
-	ret = nvkm_hwsq_init(bus, &ram->hwsq);
+	ret = nvkm_hwsq_init(subdev, &ram->hwsq);
 	if (ret)
 		return ret;
 

drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c

@@ -22,13 +22,16 @@
  * Authors: Martin Peres <martin.peres@labri.fr>
  *          Ben Skeggs
  */
-#include "nv04.h"
+#include "priv.h"
+
+#include <subdev/gpio.h>
 
 #include <subdev/gpio.h>
 
 static void
-nv04_bus_intr(struct nvkm_subdev *subdev)
+nv04_bus_intr(struct nvkm_bus *bus)
 {
+	struct nvkm_subdev *subdev = &bus->subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
 
@@ -52,46 +55,22 @@ nv04_bus_intr(struct nvkm_subdev *subdev)
 	}
 }
 
-static int
-nv04_bus_init(struct nvkm_object *object)
+static void
+nv04_bus_init(struct nvkm_bus *bus)
 {
-	struct nvkm_bus *bus = (void *)object;
 	struct nvkm_device *device = bus->subdev.device;
-
 	nvkm_wr32(device, 0x001100, 0xffffffff);
 	nvkm_wr32(device, 0x001140, 0x00000111);
-
-	return nvkm_bus_init(bus);
 }
 
+static const struct nvkm_bus_func
+nv04_bus = {
+	.init = nv04_bus_init,
+	.intr = nv04_bus_intr,
+};
+
 int
-nv04_bus_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
-	      struct nvkm_oclass *oclass, void *data, u32 size,
-	      struct nvkm_object **pobject)
+nv04_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
 {
-	struct nv04_bus_impl *impl = (void *)oclass;
-	struct nvkm_bus *bus;
-	int ret;
-
-	ret = nvkm_bus_create(parent, engine, oclass, &bus);
-	*pobject = nv_object(bus);
-	if (ret)
-		return ret;
-
-	nv_subdev(bus)->intr = impl->intr;
-	bus->hwsq_exec = impl->hwsq_exec;
-	bus->hwsq_size = impl->hwsq_size;
-	return 0;
+	return nvkm_bus_new_(&nv04_bus, device, index, pbus);
 }
-
-struct nvkm_oclass *
-nv04_bus_oclass = &(struct nv04_bus_impl) {
-	.base.handle = NV_SUBDEV(BUS, 0x04),
-	.base.ofuncs = &(struct nvkm_ofuncs) {
-		.ctor = nv04_bus_ctor,
-		.dtor = _nvkm_bus_dtor,
-		.init = nv04_bus_init,
-		.fini = _nvkm_bus_fini,
-	},
-	.intr = nv04_bus_intr,
-}.base;

drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.h

-#ifndef __NVKM_BUS_NV04_H__
-#define __NVKM_BUS_NV04_H__
-#include <subdev/bus.h>
-
-int  nv04_bus_ctor(struct nvkm_object *, struct nvkm_object *,
-		   struct nvkm_oclass *, void *, u32,
-		   struct nvkm_object **);
-int  nv50_bus_init(struct nvkm_object *);
-void nv50_bus_intr(struct nvkm_subdev *);
-
-struct nv04_bus_impl {
-	struct nvkm_oclass base;
-	void (*intr)(struct nvkm_subdev *);
-	int  (*hwsq_exec)(struct nvkm_bus *, u32 *, u32);
-	u32  hwsq_size;
-};
-#endif

drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv31.c

@@ -22,14 +22,15 @@
  * Authors: Martin Peres <martin.peres@labri.fr>
  *          Ben Skeggs
  */
-#include "nv04.h"
+#include "priv.h"
 
 #include <subdev/gpio.h>
 #include <subdev/therm.h>
 
 static void
-nv31_bus_intr(struct nvkm_subdev *subdev)
+nv31_bus_intr(struct nvkm_bus *bus)
 {
+	struct nvkm_subdev *subdev = &bus->subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
 	u32 gpio = nvkm_rd32(device, 0x001104) & nvkm_rd32(device, 0x001144);
@@ -66,30 +67,22 @@ nv31_bus_intr(struct nvkm_subdev *subdev)
 	}
 }
 
-static int
-nv31_bus_init(struct nvkm_object *object)
+static void
+nv31_bus_init(struct nvkm_bus *bus)
 {
-	struct nvkm_bus *bus = (void *)object;
 	struct nvkm_device *device = bus->subdev.device;
-	int ret;
-
-	ret = nvkm_bus_init(bus);
-	if (ret)
-		return ret;
-
 	nvkm_wr32(device, 0x001100, 0xffffffff);
 	nvkm_wr32(device, 0x001140, 0x00070008);
-	return 0;
 }
 
-struct nvkm_oclass *
-nv31_bus_oclass = &(struct nv04_bus_impl) {
-	.base.handle = NV_SUBDEV(BUS, 0x31),
-	.base.ofuncs = &(struct nvkm_ofuncs) {
-		.ctor = nv04_bus_ctor,
-		.dtor = _nvkm_bus_dtor,
-		.init = nv31_bus_init,
-		.fini = _nvkm_bus_fini,
-	},
+static const struct nvkm_bus_func
+nv31_bus = {
+	.init = nv31_bus_init,
 	.intr = nv31_bus_intr,
-}.base;
+};
+
+int
+nv31_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
+{
+	return nvkm_bus_new_(&nv31_bus, device, index, pbus);
+}

drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv50.c

@@ -22,7 +22,7 @@
  * Authors: Martin Peres <martin.peres@labri.fr>
  *          Ben Skeggs
  */
-#include "nv04.h"
+#include "priv.h"
 
 #include <subdev/therm.h>
 #include <subdev/timer.h>
@@ -50,8 +50,9 @@ nv50_bus_hwsq_exec(struct nvkm_bus *bus, u32 *data, u32 size)
 }
 
 void
-nv50_bus_intr(struct nvkm_subdev *subdev)
+nv50_bus_intr(struct nvkm_bus *bus)
 {
+	struct nvkm_subdev *subdev = &bus->subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
 
@@ -81,32 +82,24 @@ nv50_bus_intr(struct nvkm_subdev *subdev)
 	}
 }
 
-int
-nv50_bus_init(struct nvkm_object *object)
+void
+nv50_bus_init(struct nvkm_bus *bus)
 {
-	struct nvkm_bus *bus = (void *)object;
 	struct nvkm_device *device = bus->subdev.device;
-	int ret;
-
-	ret = nvkm_bus_init(bus);
-	if (ret)
-		return ret;
-
 	nvkm_wr32(device, 0x001100, 0xffffffff);
 	nvkm_wr32(device, 0x001140, 0x00010008);
-	return 0;
 }
 
-struct nvkm_oclass *
-nv50_bus_oclass = &(struct nv04_bus_impl) {
-	.base.handle = NV_SUBDEV(BUS, 0x50),
-	.base.ofuncs = &(struct nvkm_ofuncs) {
-		.ctor = nv04_bus_ctor,
-		.dtor = _nvkm_bus_dtor,
-		.init = nv50_bus_init,
-		.fini = _nvkm_bus_fini,
-	},
+static const struct nvkm_bus_func
+nv50_bus = {
+	.init = nv50_bus_init,
 	.intr = nv50_bus_intr,
 	.hwsq_exec = nv50_bus_hwsq_exec,
 	.hwsq_size = 64,
-}.base;
+};
+
+int
+nv50_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
+{
+	return nvkm_bus_new_(&nv50_bus, device, index, pbus);
+}

drivers/gpu/drm/nouveau/nvkm/subdev/bus/priv.h

+#ifndef __NVKM_BUS_PRIV_H__
+#define __NVKM_BUS_PRIV_H__
+#define nvkm_bus(p) container_of((p), struct nvkm_bus, subdev)
+#include <subdev/bus.h>
+
+struct nvkm_bus_func {
+	void (*init)(struct nvkm_bus *);
+	void (*intr)(struct nvkm_bus *);
+	int (*hwsq_exec)(struct nvkm_bus *, u32 *, u32);
+	u32 hwsq_size;
+};
+
+int nvkm_bus_new_(const struct nvkm_bus_func *, struct nvkm_device *, int,
+		  struct nvkm_bus **);
+
+void nv50_bus_init(struct nvkm_bus *);
+void nv50_bus_intr(struct nvkm_bus *);
+#endif