drivers/gpu/drm/nouveau/nvkm/engine/device/user.c - linux-mtk - Git at Google

 /*
  * Copyright 2012 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
  */
 #define nvkm_udevice(p) container_of((p), struct nvkm_udevice, object)
 #include "priv.h"
 #include "ctrl.h"

 #include <core/client.h>
 #include <subdev/fb.h>
 #include <subdev/instmem.h>
 #include <subdev/timer.h>

 #include <nvif/class.h>
 #include <nvif/cl0080.h>
 #include <nvif/unpack.h>

 struct nvkm_udevice {
 	struct nvkm_object object;
 	struct nvkm_device *device;
 };

 static int
 nvkm_udevice_info_subdev(struct nvkm_device *device, u64 mthd, u64 *data)
 {
 	struct nvkm_subdev *subdev;
 	enum nvkm_devidx subidx;

 	switch (mthd & NV_DEVICE_INFO_UNIT) {
 	case NV_DEVICE_FIFO(0): subidx = NVKM_ENGINE_FIFO; break;
 	default:
 		return -EINVAL;
 	}

 	subdev = nvkm_device_subdev(device, subidx);
 	if (subdev)
 		return nvkm_subdev_info(subdev, mthd, data);
 	return -ENODEV;
 }

 static void
 nvkm_udevice_info_v1(struct nvkm_device *device,
 		     struct nv_device_info_v1_data *args)
 {
 	if (args->mthd & NV_DEVICE_INFO_UNIT) {
 		if (nvkm_udevice_info_subdev(device, args->mthd, &args->data))
 			args->mthd = NV_DEVICE_INFO_INVALID;
 		return;
 	}

 	switch (args->mthd) {
 #define ENGINE__(A,B,C) NV_DEVICE_INFO_ENGINE_##A: { int _i;                   \
 	for (_i = (B), args->data = 0ULL; _i <= (C); _i++) {                   \
 		if (nvkm_device_engine(device, _i))                            \
 			args->data |= BIT_ULL(_i);                             \
 	}                                                                      \
 }
 #define ENGINE_A(A) ENGINE__(A, NVKM_ENGINE_##A   , NVKM_ENGINE_##A)
 #define ENGINE_B(A) ENGINE__(A, NVKM_ENGINE_##A##0, NVKM_ENGINE_##A##_LAST)
 	case ENGINE_A(SW    ); break;
 	case ENGINE_A(GR    ); break;
 	case ENGINE_A(MPEG  ); break;
 	case ENGINE_A(ME    ); break;
 	case ENGINE_A(CIPHER); break;
 	case ENGINE_A(BSP   ); break;
 	case ENGINE_A(VP    ); break;
 	case ENGINE_B(CE    ); break;
 	case ENGINE_A(SEC   ); break;
 	case ENGINE_A(MSVLD ); break;
 	case ENGINE_A(MSPDEC); break;
 	case ENGINE_A(MSPPP ); break;
 	case ENGINE_A(MSENC ); break;
 	case ENGINE_A(VIC   ); break;
 	case ENGINE_A(SEC2  ); break;
 	case ENGINE_A(NVDEC ); break;
 	case ENGINE_B(NVENC ); break;
 	default:
 		args->mthd = NV_DEVICE_INFO_INVALID;
 		break;
 	}
 }

 static int
 nvkm_udevice_info(struct nvkm_udevice *udev, void *data, u32 size)
 {
 	struct nvkm_object *object = &udev->object;
 	struct nvkm_device *device = udev->device;
 	struct nvkm_fb *fb = device->fb;
 	struct nvkm_instmem *imem = device->imem;
 	union {
 		struct nv_device_info_v0 v0;
 		struct nv_device_info_v1 v1;
 	} *args = data;
 	int ret = -ENOSYS, i;

 	nvif_ioctl(object, "device info size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v1, 1, 1, true))) {
 		nvif_ioctl(object, "device info vers %d count %d\n",
 			   args->v1.version, args->v1.count);
 		if (args->v1.count * sizeof(args->v1.data[0]) == size) {
 			for (i = 0; i < args->v1.count; i++)
 				nvkm_udevice_info_v1(device, &args->v1.data[i]);
 			return 0;
 		}
 		return -EINVAL;
 	} else
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object, "device info vers %d\n", args->v0.version);
 	} else
 		return ret;

 	switch (device->chipset) {
 	case 0x01a:
 	case 0x01f:
 	case 0x04c:
 	case 0x04e:
 	case 0x063:
 	case 0x067:
 	case 0x068:
 	case 0x0aa:
 	case 0x0ac:
 	case 0x0af:
 		args->v0.platform = NV_DEVICE_INFO_V0_IGP;
 		break;
 	default:
 		switch (device->type) {
 		case NVKM_DEVICE_PCI:
 			args->v0.platform = NV_DEVICE_INFO_V0_PCI;
 			break;
 		case NVKM_DEVICE_AGP:
 			args->v0.platform = NV_DEVICE_INFO_V0_AGP;
 			break;
 		case NVKM_DEVICE_PCIE:
 			args->v0.platform = NV_DEVICE_INFO_V0_PCIE;
 			break;
 		case NVKM_DEVICE_TEGRA:
 			args->v0.platform = NV_DEVICE_INFO_V0_SOC;
 			break;
 		default:
 			WARN_ON(1);
 			break;
 		}
 		break;
 	}

 	switch (device->card_type) {
 	case NV_04: args->v0.family = NV_DEVICE_INFO_V0_TNT; break;
 	case NV_10:
 	case NV_11: args->v0.family = NV_DEVICE_INFO_V0_CELSIUS; break;
 	case NV_20: args->v0.family = NV_DEVICE_INFO_V0_KELVIN; break;
 	case NV_30: args->v0.family = NV_DEVICE_INFO_V0_RANKINE; break;
 	case NV_40: args->v0.family = NV_DEVICE_INFO_V0_CURIE; break;
 	case NV_50: args->v0.family = NV_DEVICE_INFO_V0_TESLA; break;
 	case NV_C0: args->v0.family = NV_DEVICE_INFO_V0_FERMI; break;
 	case NV_E0: args->v0.family = NV_DEVICE_INFO_V0_KEPLER; break;
 	case GM100: args->v0.family = NV_DEVICE_INFO_V0_MAXWELL; break;
 	case GP100: args->v0.family = NV_DEVICE_INFO_V0_PASCAL; break;
 	case GV100: args->v0.family = NV_DEVICE_INFO_V0_VOLTA; break;
 	default:
 		args->v0.family = 0;
 		break;
 	}

 	args->v0.chipset  = device->chipset;
 	args->v0.revision = device->chiprev;
 	if (fb && fb->ram)
 		args->v0.ram_size = args->v0.ram_user = fb->ram->size;
 	else
 		args->v0.ram_size = args->v0.ram_user = 0;
 	if (imem && args->v0.ram_size > 0)
 		args->v0.ram_user = args->v0.ram_user - imem->reserved;

 	strncpy(args->v0.chip, device->chip->name, sizeof(args->v0.chip));
 	strncpy(args->v0.name, device->name, sizeof(args->v0.name));
 	return 0;
 }

 static int
 nvkm_udevice_time(struct nvkm_udevice *udev, void *data, u32 size)
 {
 	struct nvkm_object *object = &udev->object;
 	struct nvkm_device *device = udev->device;
 	union {
 		struct nv_device_time_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "device time size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object, "device time vers %d\n", args->v0.version);
 		args->v0.time = nvkm_timer_read(device->timer);
 	}

 	return ret;
 }

 static int
 nvkm_udevice_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	nvif_ioctl(object, "device mthd %08x\n", mthd);
 	switch (mthd) {
 	case NV_DEVICE_V0_INFO:
 		return nvkm_udevice_info(udev, data, size);
 	case NV_DEVICE_V0_TIME:
 		return nvkm_udevice_time(udev, data, size);
 	default:
 		break;
 	}
 	return -EINVAL;
 }

 static int
 nvkm_udevice_rd08(struct nvkm_object *object, u64 addr, u8 *data)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	*data = nvkm_rd08(udev->device, addr);
 	return 0;
 }

 static int
 nvkm_udevice_rd16(struct nvkm_object *object, u64 addr, u16 *data)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	*data = nvkm_rd16(udev->device, addr);
 	return 0;
 }

 static int
 nvkm_udevice_rd32(struct nvkm_object *object, u64 addr, u32 *data)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	*data = nvkm_rd32(udev->device, addr);
 	return 0;
 }

 static int
 nvkm_udevice_wr08(struct nvkm_object *object, u64 addr, u8 data)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	nvkm_wr08(udev->device, addr, data);
 	return 0;
 }

 static int
 nvkm_udevice_wr16(struct nvkm_object *object, u64 addr, u16 data)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	nvkm_wr16(udev->device, addr, data);
 	return 0;
 }

 static int
 nvkm_udevice_wr32(struct nvkm_object *object, u64 addr, u32 data)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	nvkm_wr32(udev->device, addr, data);
 	return 0;
 }

 static int
 nvkm_udevice_map(struct nvkm_object *object, void *argv, u32 argc,
 		 enum nvkm_object_map *type, u64 *addr, u64 *size)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	struct nvkm_device *device = udev->device;
 	*type = NVKM_OBJECT_MAP_IO;
 	*addr = device->func->resource_addr(device, 0);
 	*size = device->func->resource_size(device, 0);
 	return 0;
 }

 static int
 nvkm_udevice_fini(struct nvkm_object *object, bool suspend)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	struct nvkm_device *device = udev->device;
 	int ret = 0;

 	mutex_lock(&device->mutex);
 	if (!--device->refcount) {
 		ret = nvkm_device_fini(device, suspend);
 		if (ret && suspend) {
 			device->refcount++;
 			goto done;
 		}
 	}

 done:
 	mutex_unlock(&device->mutex);
 	return ret;
 }

 static int
 nvkm_udevice_init(struct nvkm_object *object)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	struct nvkm_device *device = udev->device;
 	int ret = 0;

 	mutex_lock(&device->mutex);
 	if (!device->refcount++) {
 		ret = nvkm_device_init(device);
 		if (ret) {
 			device->refcount--;
 			goto done;
 		}
 	}

 done:
 	mutex_unlock(&device->mutex);
 	return ret;
 }

 static int
 nvkm_udevice_child_new(const struct nvkm_oclass *oclass,
 		       void *data, u32 size, struct nvkm_object **pobject)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(oclass->parent);
 	const struct nvkm_device_oclass *sclass = oclass->priv;
 	return sclass->ctor(udev->device, oclass, data, size, pobject);
 }

 static int
 nvkm_udevice_child_get(struct nvkm_object *object, int index,
 		       struct nvkm_oclass *oclass)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	struct nvkm_device *device = udev->device;
 	struct nvkm_engine *engine;
 	u64 mask = (1ULL << NVKM_ENGINE_DMAOBJ) |
 		   (1ULL << NVKM_ENGINE_FIFO) |
 		   (1ULL << NVKM_ENGINE_DISP) |
 		   (1ULL << NVKM_ENGINE_PM);
 	const struct nvkm_device_oclass *sclass = NULL;
 	int i;

 	for (; i = __ffs64(mask), mask && !sclass; mask &= ~(1ULL << i)) {
 		if (!(engine = nvkm_device_engine(device, i)) ||
 		    !(engine->func->base.sclass))
 			continue;
 		oclass->engine = engine;

 		index -= engine->func->base.sclass(oclass, index, &sclass);
 	}

 	if (!sclass) {
 		switch (index) {
 		case 0: sclass = &nvkm_control_oclass; break;
 		case 1:
 			if (!device->mmu)
 				return -EINVAL;
 			sclass = &device->mmu->user;
 			break;
 		default:
 			return -EINVAL;
 		}
 		oclass->base = sclass->base;
 	}

 	oclass->ctor = nvkm_udevice_child_new;
 	oclass->priv = sclass;
 	return 0;
 }

 static const struct nvkm_object_func
 nvkm_udevice_super = {
 	.init = nvkm_udevice_init,
 	.fini = nvkm_udevice_fini,
 	.mthd = nvkm_udevice_mthd,
 	.map = nvkm_udevice_map,
 	.rd08 = nvkm_udevice_rd08,
 	.rd16 = nvkm_udevice_rd16,
 	.rd32 = nvkm_udevice_rd32,
 	.wr08 = nvkm_udevice_wr08,
 	.wr16 = nvkm_udevice_wr16,
 	.wr32 = nvkm_udevice_wr32,
 	.sclass = nvkm_udevice_child_get,
 };

 static const struct nvkm_object_func
 nvkm_udevice = {
 	.init = nvkm_udevice_init,
 	.fini = nvkm_udevice_fini,
 	.mthd = nvkm_udevice_mthd,
 	.sclass = nvkm_udevice_child_get,
 };

 static int
 nvkm_udevice_new(const struct nvkm_oclass *oclass, void *data, u32 size,
 		 struct nvkm_object **pobject)
 {
 	union {
 		struct nv_device_v0 v0;
 	} *args = data;
 	struct nvkm_client *client = oclass->client;
 	struct nvkm_object *parent = &client->object;
 	const struct nvkm_object_func *func;
 	struct nvkm_udevice *udev;
 	int ret = -ENOSYS;

 	nvif_ioctl(parent, "create device size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(parent, "create device v%d device %016llx\n",
 			   args->v0.version, args->v0.device);
 	} else
 		return ret;

 	/* give priviledged clients register access */
 	if (client->super)
 		func = &nvkm_udevice_super;
 	else
 		func = &nvkm_udevice;

 	if (!(udev = kzalloc(sizeof(*udev), GFP_KERNEL)))
 		return -ENOMEM;
 	nvkm_object_ctor(func, oclass, &udev->object);
 	*pobject = &udev->object;

 	/* find the device that matches what the client requested */
 	if (args->v0.device != ~0)
 		udev->device = nvkm_device_find(args->v0.device);
 	else
 		udev->device = nvkm_device_find(client->device);
 	if (!udev->device)
 		return -ENODEV;

 	return 0;
 }

 const struct nvkm_sclass
 nvkm_udevice_sclass = {
 	.oclass = NV_DEVICE,
 	.minver = 0,
 	.maxver = 0,
 	.ctor = nvkm_udevice_new,
 };
	/*
	* Copyright 2012 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
	*/
	#define nvkm_udevice(p) container_of((p), struct nvkm_udevice, object)
	#include "priv.h"
	#include "ctrl.h"

	#include <core/client.h>
	#include <subdev/fb.h>
	#include <subdev/instmem.h>
	#include <subdev/timer.h>

	#include <nvif/class.h>
	#include <nvif/cl0080.h>
	#include <nvif/unpack.h>

	struct nvkm_udevice {
	struct nvkm_object object;
	struct nvkm_device *device;
	};

	static int
	nvkm_udevice_info_subdev(struct nvkm_device device, u64 mthd, u64 data)
	{
	struct nvkm_subdev *subdev;
	enum nvkm_devidx subidx;

	switch (mthd & NV_DEVICE_INFO_UNIT) {
	case NV_DEVICE_FIFO(0): subidx = NVKM_ENGINE_FIFO; break;
	default:
	return -EINVAL;
	}

	subdev = nvkm_device_subdev(device, subidx);
	if (subdev)
	return nvkm_subdev_info(subdev, mthd, data);
	return -ENODEV;
	}

	static void
	nvkm_udevice_info_v1(struct nvkm_device *device,
	struct nv_device_info_v1_data *args)
	{
	if (args->mthd & NV_DEVICE_INFO_UNIT) {
	if (nvkm_udevice_info_subdev(device, args->mthd, &args->data))
	args->mthd = NV_DEVICE_INFO_INVALID;
	return;
	}

	switch (args->mthd) {
	#define ENGINE__(A,B,C) NV_DEVICE_INFO_ENGINE_##A: { int _i; \
	for (_i = (B), args->data = 0ULL; _i <= (C); _i++) { \
	if (nvkm_device_engine(device, _i)) \
	args->data \|= BIT_ULL(_i); \
	} \
	}
	#define ENGINE_A(A) ENGINE__(A, NVKM_ENGINE_##A , NVKM_ENGINE_##A)
	#define ENGINE_B(A) ENGINE__(A, NVKM_ENGINE_##A##0, NVKM_ENGINE_##A##_LAST)
	case ENGINE_A(SW ); break;
	case ENGINE_A(GR ); break;
	case ENGINE_A(MPEG ); break;
	case ENGINE_A(ME ); break;
	case ENGINE_A(CIPHER); break;
	case ENGINE_A(BSP ); break;
	case ENGINE_A(VP ); break;
	case ENGINE_B(CE ); break;
	case ENGINE_A(SEC ); break;
	case ENGINE_A(MSVLD ); break;
	case ENGINE_A(MSPDEC); break;
	case ENGINE_A(MSPPP ); break;
	case ENGINE_A(MSENC ); break;
	case ENGINE_A(VIC ); break;
	case ENGINE_A(SEC2 ); break;
	case ENGINE_A(NVDEC ); break;
	case ENGINE_B(NVENC ); break;
	default:
	args->mthd = NV_DEVICE_INFO_INVALID;
	break;
	}
	}

	static int
	nvkm_udevice_info(struct nvkm_udevice udev, void data, u32 size)
	{
	struct nvkm_object *object = &udev->object;
	struct nvkm_device *device = udev->device;
	struct nvkm_fb *fb = device->fb;
	struct nvkm_instmem *imem = device->imem;
	union {
	struct nv_device_info_v0 v0;
	struct nv_device_info_v1 v1;
	} *args = data;
	int ret = -ENOSYS, i;

	nvif_ioctl(object, "device info size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v1, 1, 1, true))) {
	nvif_ioctl(object, "device info vers %d count %d\n",
	args->v1.version, args->v1.count);
	if (args->v1.count * sizeof(args->v1.data[0]) == size) {
	for (i = 0; i < args->v1.count; i++)
	nvkm_udevice_info_v1(device, &args->v1.data[i]);
	return 0;
	}
	return -EINVAL;
	} else
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object, "device info vers %d\n", args->v0.version);
	} else
	return ret;

	switch (device->chipset) {
	case 0x01a:
	case 0x01f:
	case 0x04c:
	case 0x04e:
	case 0x063:
	case 0x067:
	case 0x068:
	case 0x0aa:
	case 0x0ac:
	case 0x0af:
	args->v0.platform = NV_DEVICE_INFO_V0_IGP;
	break;
	default:
	switch (device->type) {
	case NVKM_DEVICE_PCI:
	args->v0.platform = NV_DEVICE_INFO_V0_PCI;
	break;
	case NVKM_DEVICE_AGP:
	args->v0.platform = NV_DEVICE_INFO_V0_AGP;
	break;
	case NVKM_DEVICE_PCIE:
	args->v0.platform = NV_DEVICE_INFO_V0_PCIE;
	break;
	case NVKM_DEVICE_TEGRA:
	args->v0.platform = NV_DEVICE_INFO_V0_SOC;
	break;
	default:
	WARN_ON(1);
	break;
	}
	break;
	}

	switch (device->card_type) {
	case NV_04: args->v0.family = NV_DEVICE_INFO_V0_TNT; break;
	case NV_10:
	case NV_11: args->v0.family = NV_DEVICE_INFO_V0_CELSIUS; break;
	case NV_20: args->v0.family = NV_DEVICE_INFO_V0_KELVIN; break;
	case NV_30: args->v0.family = NV_DEVICE_INFO_V0_RANKINE; break;
	case NV_40: args->v0.family = NV_DEVICE_INFO_V0_CURIE; break;
	case NV_50: args->v0.family = NV_DEVICE_INFO_V0_TESLA; break;
	case NV_C0: args->v0.family = NV_DEVICE_INFO_V0_FERMI; break;
	case NV_E0: args->v0.family = NV_DEVICE_INFO_V0_KEPLER; break;
	case GM100: args->v0.family = NV_DEVICE_INFO_V0_MAXWELL; break;
	case GP100: args->v0.family = NV_DEVICE_INFO_V0_PASCAL; break;
	case GV100: args->v0.family = NV_DEVICE_INFO_V0_VOLTA; break;
	default:
	args->v0.family = 0;
	break;
	}

	args->v0.chipset = device->chipset;
	args->v0.revision = device->chiprev;
	if (fb && fb->ram)
	args->v0.ram_size = args->v0.ram_user = fb->ram->size;
	else
	args->v0.ram_size = args->v0.ram_user = 0;
	if (imem && args->v0.ram_size > 0)
	args->v0.ram_user = args->v0.ram_user - imem->reserved;

	strncpy(args->v0.chip, device->chip->name, sizeof(args->v0.chip));
	strncpy(args->v0.name, device->name, sizeof(args->v0.name));
	return 0;
	}

	static int
	nvkm_udevice_time(struct nvkm_udevice udev, void data, u32 size)
	{
	struct nvkm_object *object = &udev->object;
	struct nvkm_device *device = udev->device;
	union {
	struct nv_device_time_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "device time size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object, "device time vers %d\n", args->v0.version);
	args->v0.time = nvkm_timer_read(device->timer);
	}

	return ret;
	}

	static int
	nvkm_udevice_mthd(struct nvkm_object object, u32 mthd, void data, u32 size)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	nvif_ioctl(object, "device mthd %08x\n", mthd);
	switch (mthd) {
	case NV_DEVICE_V0_INFO:
	return nvkm_udevice_info(udev, data, size);
	case NV_DEVICE_V0_TIME:
	return nvkm_udevice_time(udev, data, size);
	default:
	break;
	}
	return -EINVAL;
	}

	static int
	nvkm_udevice_rd08(struct nvkm_object object, u64 addr, u8 data)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	*data = nvkm_rd08(udev->device, addr);
	return 0;
	}

	static int
	nvkm_udevice_rd16(struct nvkm_object object, u64 addr, u16 data)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	*data = nvkm_rd16(udev->device, addr);
	return 0;
	}

	static int
	nvkm_udevice_rd32(struct nvkm_object object, u64 addr, u32 data)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	*data = nvkm_rd32(udev->device, addr);
	return 0;
	}

	static int
	nvkm_udevice_wr08(struct nvkm_object *object, u64 addr, u8 data)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	nvkm_wr08(udev->device, addr, data);
	return 0;
	}

	static int
	nvkm_udevice_wr16(struct nvkm_object *object, u64 addr, u16 data)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	nvkm_wr16(udev->device, addr, data);
	return 0;
	}

	static int
	nvkm_udevice_wr32(struct nvkm_object *object, u64 addr, u32 data)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	nvkm_wr32(udev->device, addr, data);
	return 0;
	}

	static int
	nvkm_udevice_map(struct nvkm_object object, void argv, u32 argc,
	enum nvkm_object_map type, u64 addr, u64 *size)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	struct nvkm_device *device = udev->device;
	*type = NVKM_OBJECT_MAP_IO;
	*addr = device->func->resource_addr(device, 0);
	*size = device->func->resource_size(device, 0);
	return 0;
	}

	static int
	nvkm_udevice_fini(struct nvkm_object *object, bool suspend)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	struct nvkm_device *device = udev->device;
	int ret = 0;

	mutex_lock(&device->mutex);
	if (!--device->refcount) {
	ret = nvkm_device_fini(device, suspend);
	if (ret && suspend) {
	device->refcount++;
	goto done;
	}
	}

	done:
	mutex_unlock(&device->mutex);
	return ret;
	}

	static int
	nvkm_udevice_init(struct nvkm_object *object)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	struct nvkm_device *device = udev->device;
	int ret = 0;

	mutex_lock(&device->mutex);
	if (!device->refcount++) {
	ret = nvkm_device_init(device);
	if (ret) {
	device->refcount--;
	goto done;
	}
	}

	done:
	mutex_unlock(&device->mutex);
	return ret;
	}

	static int
	nvkm_udevice_child_new(const struct nvkm_oclass *oclass,
	void data, u32 size, struct nvkm_object *pobject)
	{
	struct nvkm_udevice *udev = nvkm_udevice(oclass->parent);
	const struct nvkm_device_oclass *sclass = oclass->priv;
	return sclass->ctor(udev->device, oclass, data, size, pobject);
	}

	static int
	nvkm_udevice_child_get(struct nvkm_object *object, int index,
	struct nvkm_oclass *oclass)
	{
	struct nvkm_udevice *udev = nvkm_udevice(object);
	struct nvkm_device *device = udev->device;
	struct nvkm_engine *engine;
	u64 mask = (1ULL << NVKM_ENGINE_DMAOBJ) \|
	(1ULL << NVKM_ENGINE_FIFO) \|
	(1ULL << NVKM_ENGINE_DISP) \|
	(1ULL << NVKM_ENGINE_PM);
	const struct nvkm_device_oclass *sclass = NULL;
	int i;

	for (; i = __ffs64(mask), mask && !sclass; mask &= ~(1ULL << i)) {
	if (!(engine = nvkm_device_engine(device, i)) \|\|
	!(engine->func->base.sclass))
	continue;
	oclass->engine = engine;

	index -= engine->func->base.sclass(oclass, index, &sclass);
	}

	if (!sclass) {
	switch (index) {
	case 0: sclass = &nvkm_control_oclass; break;
	case 1:
	if (!device->mmu)
	return -EINVAL;
	sclass = &device->mmu->user;
	break;
	default:
	return -EINVAL;
	}
	oclass->base = sclass->base;
	}

	oclass->ctor = nvkm_udevice_child_new;
	oclass->priv = sclass;
	return 0;
	}

	static const struct nvkm_object_func
	nvkm_udevice_super = {
	.init = nvkm_udevice_init,
	.fini = nvkm_udevice_fini,
	.mthd = nvkm_udevice_mthd,
	.map = nvkm_udevice_map,
	.rd08 = nvkm_udevice_rd08,
	.rd16 = nvkm_udevice_rd16,
	.rd32 = nvkm_udevice_rd32,
	.wr08 = nvkm_udevice_wr08,
	.wr16 = nvkm_udevice_wr16,
	.wr32 = nvkm_udevice_wr32,
	.sclass = nvkm_udevice_child_get,
	};

	static const struct nvkm_object_func
	nvkm_udevice = {
	.init = nvkm_udevice_init,
	.fini = nvkm_udevice_fini,
	.mthd = nvkm_udevice_mthd,
	.sclass = nvkm_udevice_child_get,
	};

	static int
	nvkm_udevice_new(const struct nvkm_oclass oclass, void data, u32 size,
	struct nvkm_object **pobject)
	{
	union {
	struct nv_device_v0 v0;
	} *args = data;
	struct nvkm_client *client = oclass->client;
	struct nvkm_object *parent = &client->object;
	const struct nvkm_object_func *func;
	struct nvkm_udevice *udev;
	int ret = -ENOSYS;

	nvif_ioctl(parent, "create device size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(parent, "create device v%d device %016llx\n",
	args->v0.version, args->v0.device);
	} else
	return ret;

	/* give priviledged clients register access */
	if (client->super)
	func = &nvkm_udevice_super;
	else
	func = &nvkm_udevice;

	if (!(udev = kzalloc(sizeof(*udev), GFP_KERNEL)))
	return -ENOMEM;
	nvkm_object_ctor(func, oclass, &udev->object);
	*pobject = &udev->object;

	/* find the device that matches what the client requested */
	if (args->v0.device != ~0)
	udev->device = nvkm_device_find(args->v0.device);
	else
	udev->device = nvkm_device_find(client->device);
	if (!udev->device)
	return -ENODEV;

	return 0;
	}

	const struct nvkm_sclass
	nvkm_udevice_sclass = {
	.oclass = NV_DEVICE,
	.minver = 0,
	.maxver = 0,
	.ctor = nvkm_udevice_new,
	};