drm/nouveau/core: define FAULT subdev

This will be responsible for the handling of MMU fault buffers on GPUs
that support them.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/core/device.h

@@ -22,6 +22,7 @@ enum nvkm_devidx {
 	NVKM_SUBDEV_LTC,
 	NVKM_SUBDEV_MMU,
 	NVKM_SUBDEV_BAR,
+	NVKM_SUBDEV_FAULT,
 	NVKM_SUBDEV_PMU,
 	NVKM_SUBDEV_VOLT,
 	NVKM_SUBDEV_ICCSENSE,
@@ -123,6 +124,7 @@ struct nvkm_device {
 	struct nvkm_bus *bus;
 	struct nvkm_clk *clk;
 	struct nvkm_devinit *devinit;
+	struct nvkm_fault *fault;
 	struct nvkm_fb *fb;
 	struct nvkm_fuse *fuse;
 	struct nvkm_gpio *gpio;
@@ -194,6 +196,7 @@ struct nvkm_device_chip {
 	int (*bus     )(struct nvkm_device *, int idx, struct nvkm_bus **);
 	int (*clk     )(struct nvkm_device *, int idx, struct nvkm_clk **);
 	int (*devinit )(struct nvkm_device *, int idx, struct nvkm_devinit **);
+	int (*fault   )(struct nvkm_device *, int idx, struct nvkm_fault **);
 	int (*fb      )(struct nvkm_device *, int idx, struct nvkm_fb **);
 	int (*fuse    )(struct nvkm_device *, int idx, struct nvkm_fuse **);
 	int (*gpio    )(struct nvkm_device *, int idx, struct nvkm_gpio **);

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

+#ifndef __NVKM_FAULT_H__
+#define __NVKM_FAULT_H__
+#include <core/subdev.h>
+
+struct nvkm_fault {
+	struct nvkm_subdev subdev;
+};
+#endif

drivers/gpu/drm/nouveau/nvkm/core/subdev.c

@@ -35,6 +35,7 @@ nvkm_subdev_name[NVKM_SUBDEV_NR] = {
 	[NVKM_SUBDEV_BUS     ] = "bus",
 	[NVKM_SUBDEV_CLK     ] = "clk",
 	[NVKM_SUBDEV_DEVINIT ] = "devinit",
+	[NVKM_SUBDEV_FAULT   ] = "fault",
 	[NVKM_SUBDEV_FB      ] = "fb",
 	[NVKM_SUBDEV_FUSE    ] = "fuse",
 	[NVKM_SUBDEV_GPIO    ] = "gpio",

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

@@ -2420,6 +2420,7 @@ nvkm_device_subdev(struct nvkm_device *device, int index)
 	_(BUS     , device->bus     , &device->bus->subdev);
 	_(CLK     , device->clk     , &device->clk->subdev);
 	_(DEVINIT , device->devinit , &device->devinit->subdev);
+	_(FAULT   , device->fault   , &device->fault->subdev);
 	_(FB      , device->fb      , &device->fb->subdev);
 	_(FUSE    , device->fuse    , &device->fuse->subdev);
 	_(GPIO    , device->gpio    , &device->gpio->subdev);
@@ -2891,6 +2892,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
 		_(NVKM_SUBDEV_BUS     ,      bus);
 		_(NVKM_SUBDEV_CLK     ,      clk);
 		_(NVKM_SUBDEV_DEVINIT ,  devinit);
+		_(NVKM_SUBDEV_FAULT   ,    fault);
 		_(NVKM_SUBDEV_FB      ,       fb);
 		_(NVKM_SUBDEV_FUSE    ,     fuse);
 		_(NVKM_SUBDEV_GPIO    ,     gpio);

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

@@ -8,6 +8,7 @@
 #include <subdev/bus.h>
 #include <subdev/clk.h>
 #include <subdev/devinit.h>
+#include <subdev/fault.h>
 #include <subdev/fb.h>
 #include <subdev/fuse.h>
 #include <subdev/gpio.h>

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

@@ -3,6 +3,7 @@ include $(src)/nvkm/subdev/bios/Kbuild
 include $(src)/nvkm/subdev/bus/Kbuild
 include $(src)/nvkm/subdev/clk/Kbuild
 include $(src)/nvkm/subdev/devinit/Kbuild
+include $(src)/nvkm/subdev/fault/Kbuild
 include $(src)/nvkm/subdev/fb/Kbuild
 include $(src)/nvkm/subdev/fuse/Kbuild
 include $(src)/nvkm/subdev/gpio/Kbuild