drivers/gpu/drm/nouveau/nvkm/core/ioctl.c - linux - Git at Google

 /*
  * Copyright 2014 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 <core/ioctl.h>
 #include <core/client.h>
 #include <core/engine.h>

 #include <nvif/unpack.h>
 #include <nvif/ioctl.h>

 static int
 nvkm_ioctl_nop(struct nvkm_client *client,
 	       struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_nop_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

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

 	return ret;
 }

 static int
 nvkm_ioctl_sclass(struct nvkm_client *client,
 		  struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_sclass_v0 v0;
 	} *args = data;
 	struct nvkm_oclass oclass = { .client = client };
 	int ret = -ENOSYS, i = 0;

 	nvif_ioctl(object, "sclass size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(object, "sclass vers %d count %d\n",
 			   args->v0.version, args->v0.count);
 		if (size != args->v0.count * sizeof(args->v0.oclass[0]))
 			return -EINVAL;

 		while (object->func->sclass &&
 		       object->func->sclass(object, i, &oclass) >= 0) {
 			if (i < args->v0.count) {
 				args->v0.oclass[i].oclass = oclass.base.oclass;
 				args->v0.oclass[i].minver = oclass.base.minver;
 				args->v0.oclass[i].maxver = oclass.base.maxver;
 			}
 			i++;
 		}

 		args->v0.count = i;
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_new(struct nvkm_client *client,
 	       struct nvkm_object *parent, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_new_v0 v0;
 	} *args = data;
 	struct nvkm_object *object = NULL;
 	struct nvkm_oclass oclass;
 	int ret = -ENOSYS, i = 0;

 	nvif_ioctl(parent, "new size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(parent, "new vers %d handle %08x class %08x "
 				   "route %02x token %llx object %016llx\n",
 			   args->v0.version, args->v0.handle, args->v0.oclass,
 			   args->v0.route, args->v0.token, args->v0.object);
 	} else
 		return ret;

 	if (!parent->func->sclass) {
 		nvif_ioctl(parent, "cannot have children\n");
 		return -EINVAL;
 	}

 	do {
 		memset(&oclass, 0x00, sizeof(oclass));
 		oclass.handle = args->v0.handle;
 		oclass.route  = args->v0.route;
 		oclass.token  = args->v0.token;
 		oclass.object = args->v0.object;
 		oclass.client = client;
 		oclass.parent = parent;
 		ret = parent->func->sclass(parent, i++, &oclass);
 		if (ret)
 			return ret;
 	} while (oclass.base.oclass != args->v0.oclass);

 	if (oclass.engine) {
 		oclass.engine = nvkm_engine_ref(oclass.engine);
 		if (IS_ERR(oclass.engine))
 			return PTR_ERR(oclass.engine);
 	}

 	ret = oclass.ctor(&oclass, data, size, &object);
 	nvkm_engine_unref(&oclass.engine);
 	if (ret == 0) {
 		ret = nvkm_object_init(object);
 		if (ret == 0) {
 			list_add(&object->head, &parent->tree);
 			if (nvkm_object_insert(object)) {
 				client->data = object;
 				return 0;
 			}
 			ret = -EEXIST;
 		}
 		nvkm_object_fini(object, false);
 	}

 	nvkm_object_del(&object);
 	return ret;
 }

 static int
 nvkm_ioctl_del(struct nvkm_client *client,
 	       struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_del none;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "delete size %d\n", size);
 	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
 		nvif_ioctl(object, "delete\n");
 		nvkm_object_fini(object, false);
 		nvkm_object_del(&object);
 	}

 	return ret ? ret : 1;
 }

 static int
 nvkm_ioctl_mthd(struct nvkm_client *client,
 		struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_mthd_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "mthd size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(object, "mthd vers %d mthd %02x\n",
 			   args->v0.version, args->v0.method);
 		ret = nvkm_object_mthd(object, args->v0.method, data, size);
 	}

 	return ret;
 }


 static int
 nvkm_ioctl_rd(struct nvkm_client *client,
 	      struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_rd_v0 v0;
 	} *args = data;
 	union {
 		u8  b08;
 		u16 b16;
 		u32 b32;
 	} v;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "rd size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object, "rd vers %d size %d addr %016llx\n",
 			   args->v0.version, args->v0.size, args->v0.addr);
 		switch (args->v0.size) {
 		case 1:
 			ret = nvkm_object_rd08(object, args->v0.addr, &v.b08);
 			args->v0.data = v.b08;
 			break;
 		case 2:
 			ret = nvkm_object_rd16(object, args->v0.addr, &v.b16);
 			args->v0.data = v.b16;
 			break;
 		case 4:
 			ret = nvkm_object_rd32(object, args->v0.addr, &v.b32);
 			args->v0.data = v.b32;
 			break;
 		default:
 			ret = -EINVAL;
 			break;
 		}
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_wr(struct nvkm_client *client,
 	      struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_wr_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "wr size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object,
 			   "wr vers %d size %d addr %016llx data %08x\n",
 			   args->v0.version, args->v0.size, args->v0.addr,
 			   args->v0.data);
 	} else
 		return ret;

 	switch (args->v0.size) {
 	case 1: return nvkm_object_wr08(object, args->v0.addr, args->v0.data);
 	case 2: return nvkm_object_wr16(object, args->v0.addr, args->v0.data);
 	case 4: return nvkm_object_wr32(object, args->v0.addr, args->v0.data);
 	default:
 		break;
 	}

 	return -EINVAL;
 }

 static int
 nvkm_ioctl_map(struct nvkm_client *client,
 	       struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_map_v0 v0;
 	} *args = data;
 	enum nvkm_object_map type;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "map size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(object, "map vers %d\n", args->v0.version);
 		ret = nvkm_object_map(object, data, size, &type,
 				      &args->v0.handle,
 				      &args->v0.length);
 		if (type == NVKM_OBJECT_MAP_IO)
 			args->v0.type = NVIF_IOCTL_MAP_V0_IO;
 		else
 			args->v0.type = NVIF_IOCTL_MAP_V0_VA;
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_unmap(struct nvkm_client *client,
 		 struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_unmap none;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "unmap size %d\n", size);
 	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
 		nvif_ioctl(object, "unmap\n");
 		ret = nvkm_object_unmap(object);
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_ntfy_new(struct nvkm_client *client,
 		    struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_ntfy_new_v0 v0;
 	} *args = data;
 	struct nvkm_event *event;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "ntfy new size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(object, "ntfy new vers %d event %02x\n",
 			   args->v0.version, args->v0.event);
 		ret = nvkm_object_ntfy(object, args->v0.event, &event);
 		if (ret == 0) {
 			ret = nvkm_client_notify_new(object, event, data, size);
 			if (ret >= 0) {
 				args->v0.index = ret;
 				ret = 0;
 			}
 		}
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_ntfy_del(struct nvkm_client *client,
 		    struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_ntfy_del_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "ntfy del size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object, "ntfy del vers %d index %d\n",
 			   args->v0.version, args->v0.index);
 		ret = nvkm_client_notify_del(client, args->v0.index);
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_ntfy_get(struct nvkm_client *client,
 		    struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_ntfy_get_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "ntfy get size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object, "ntfy get vers %d index %d\n",
 			   args->v0.version, args->v0.index);
 		ret = nvkm_client_notify_get(client, args->v0.index);
 	}

 	return ret;
 }

 static int
 nvkm_ioctl_ntfy_put(struct nvkm_client *client,
 		    struct nvkm_object *object, void *data, u32 size)
 {
 	union {
 		struct nvif_ioctl_ntfy_put_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "ntfy put size %d\n", size);
 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 		nvif_ioctl(object, "ntfy put vers %d index %d\n",
 			   args->v0.version, args->v0.index);
 		ret = nvkm_client_notify_put(client, args->v0.index);
 	}

 	return ret;
 }

 static struct {
 	int version;
 	int (*func)(struct nvkm_client *, struct nvkm_object *, void *, u32);
 }
 nvkm_ioctl_v0[] = {
 	{ 0x00, nvkm_ioctl_nop },
 	{ 0x00, nvkm_ioctl_sclass },
 	{ 0x00, nvkm_ioctl_new },
 	{ 0x00, nvkm_ioctl_del },
 	{ 0x00, nvkm_ioctl_mthd },
 	{ 0x00, nvkm_ioctl_rd },
 	{ 0x00, nvkm_ioctl_wr },
 	{ 0x00, nvkm_ioctl_map },
 	{ 0x00, nvkm_ioctl_unmap },
 	{ 0x00, nvkm_ioctl_ntfy_new },
 	{ 0x00, nvkm_ioctl_ntfy_del },
 	{ 0x00, nvkm_ioctl_ntfy_get },
 	{ 0x00, nvkm_ioctl_ntfy_put },
 };

 static int
 nvkm_ioctl_path(struct nvkm_client *client, u64 handle, u32 type,
 		void *data, u32 size, u8 owner, u8 *route, u64 *token)
 {
 	struct nvkm_object *object;
 	int ret;

 	object = nvkm_object_search(client, handle, NULL);
 	if (IS_ERR(object)) {
 		nvif_ioctl(&client->object, "object not found\n");
 		return PTR_ERR(object);
 	}

 	if (owner != NVIF_IOCTL_V0_OWNER_ANY && owner != object->route) {
 		nvif_ioctl(&client->object, "route != owner\n");
 		return -EACCES;
 	}
 	*route = object->route;
 	*token = object->token;

 	if (ret = -EINVAL, type < ARRAY_SIZE(nvkm_ioctl_v0)) {
 		if (nvkm_ioctl_v0[type].version == 0)
 			ret = nvkm_ioctl_v0[type].func(client, object, data, size);
 	}

 	return ret;
 }

 int
 nvkm_ioctl(struct nvkm_client *client, void *data, u32 size, void **hack)
 {
 	struct nvkm_object *object = &client->object;
 	union {
 		struct nvif_ioctl_v0 v0;
 	} *args = data;
 	int ret = -ENOSYS;

 	nvif_ioctl(object, "size %d\n", size);

 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(object,
 			   "vers %d type %02x object %016llx owner %02x\n",
 			   args->v0.version, args->v0.type, args->v0.object,
 			   args->v0.owner);
 		ret = nvkm_ioctl_path(client, args->v0.object, args->v0.type,
 				      data, size, args->v0.owner,
 				      &args->v0.route, &args->v0.token);
 	}

 	if (ret != 1) {
 		nvif_ioctl(object, "return %d\n", ret);
 		if (hack) {
 			*hack = client->data;
 			client->data = NULL;
 		}
 	}

 	return ret;
 }
	/*
	* Copyright 2014 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 <core/ioctl.h>
	#include <core/client.h>
	#include <core/engine.h>

	#include <nvif/unpack.h>
	#include <nvif/ioctl.h>

	static int
	nvkm_ioctl_nop(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_nop_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

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

	return ret;
	}

	static int
	nvkm_ioctl_sclass(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_sclass_v0 v0;
	} *args = data;
	struct nvkm_oclass oclass = { .client = client };
	int ret = -ENOSYS, i = 0;

	nvif_ioctl(object, "sclass size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
	nvif_ioctl(object, "sclass vers %d count %d\n",
	args->v0.version, args->v0.count);
	if (size != args->v0.count * sizeof(args->v0.oclass[0]))
	return -EINVAL;

	while (object->func->sclass &&
	object->func->sclass(object, i, &oclass) >= 0) {
	if (i < args->v0.count) {
	args->v0.oclass[i].oclass = oclass.base.oclass;
	args->v0.oclass[i].minver = oclass.base.minver;
	args->v0.oclass[i].maxver = oclass.base.maxver;
	}
	i++;
	}

	args->v0.count = i;
	}

	return ret;
	}

	static int
	nvkm_ioctl_new(struct nvkm_client *client,
	struct nvkm_object parent, void data, u32 size)
	{
	union {
	struct nvif_ioctl_new_v0 v0;
	} *args = data;
	struct nvkm_object *object = NULL;
	struct nvkm_oclass oclass;
	int ret = -ENOSYS, i = 0;

	nvif_ioctl(parent, "new size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
	nvif_ioctl(parent, "new vers %d handle %08x class %08x "
	"route %02x token %llx object %016llx\n",
	args->v0.version, args->v0.handle, args->v0.oclass,
	args->v0.route, args->v0.token, args->v0.object);
	} else
	return ret;

	if (!parent->func->sclass) {
	nvif_ioctl(parent, "cannot have children\n");
	return -EINVAL;
	}

	do {
	memset(&oclass, 0x00, sizeof(oclass));
	oclass.handle = args->v0.handle;
	oclass.route = args->v0.route;
	oclass.token = args->v0.token;
	oclass.object = args->v0.object;
	oclass.client = client;
	oclass.parent = parent;
	ret = parent->func->sclass(parent, i++, &oclass);
	if (ret)
	return ret;
	} while (oclass.base.oclass != args->v0.oclass);

	if (oclass.engine) {
	oclass.engine = nvkm_engine_ref(oclass.engine);
	if (IS_ERR(oclass.engine))
	return PTR_ERR(oclass.engine);
	}

	ret = oclass.ctor(&oclass, data, size, &object);
	nvkm_engine_unref(&oclass.engine);
	if (ret == 0) {
	ret = nvkm_object_init(object);
	if (ret == 0) {
	list_add(&object->head, &parent->tree);
	if (nvkm_object_insert(object)) {
	client->data = object;
	return 0;
	}
	ret = -EEXIST;
	}
	nvkm_object_fini(object, false);
	}

	nvkm_object_del(&object);
	return ret;
	}

	static int
	nvkm_ioctl_del(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_del none;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "delete size %d\n", size);
	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
	nvif_ioctl(object, "delete\n");
	nvkm_object_fini(object, false);
	nvkm_object_del(&object);
	}

	return ret ? ret : 1;
	}

	static int
	nvkm_ioctl_mthd(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_mthd_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "mthd size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
	nvif_ioctl(object, "mthd vers %d mthd %02x\n",
	args->v0.version, args->v0.method);
	ret = nvkm_object_mthd(object, args->v0.method, data, size);
	}

	return ret;
	}


	static int
	nvkm_ioctl_rd(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_rd_v0 v0;
	} *args = data;
	union {
	u8 b08;
	u16 b16;
	u32 b32;
	} v;
	int ret = -ENOSYS;

	nvif_ioctl(object, "rd size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object, "rd vers %d size %d addr %016llx\n",
	args->v0.version, args->v0.size, args->v0.addr);
	switch (args->v0.size) {
	case 1:
	ret = nvkm_object_rd08(object, args->v0.addr, &v.b08);
	args->v0.data = v.b08;
	break;
	case 2:
	ret = nvkm_object_rd16(object, args->v0.addr, &v.b16);
	args->v0.data = v.b16;
	break;
	case 4:
	ret = nvkm_object_rd32(object, args->v0.addr, &v.b32);
	args->v0.data = v.b32;
	break;
	default:
	ret = -EINVAL;
	break;
	}
	}

	return ret;
	}

	static int
	nvkm_ioctl_wr(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_wr_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "wr size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object,
	"wr vers %d size %d addr %016llx data %08x\n",
	args->v0.version, args->v0.size, args->v0.addr,
	args->v0.data);
	} else
	return ret;

	switch (args->v0.size) {
	case 1: return nvkm_object_wr08(object, args->v0.addr, args->v0.data);
	case 2: return nvkm_object_wr16(object, args->v0.addr, args->v0.data);
	case 4: return nvkm_object_wr32(object, args->v0.addr, args->v0.data);
	default:
	break;
	}

	return -EINVAL;
	}

	static int
	nvkm_ioctl_map(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_map_v0 v0;
	} *args = data;
	enum nvkm_object_map type;
	int ret = -ENOSYS;

	nvif_ioctl(object, "map size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
	nvif_ioctl(object, "map vers %d\n", args->v0.version);
	ret = nvkm_object_map(object, data, size, &type,
	&args->v0.handle,
	&args->v0.length);
	if (type == NVKM_OBJECT_MAP_IO)
	args->v0.type = NVIF_IOCTL_MAP_V0_IO;
	else
	args->v0.type = NVIF_IOCTL_MAP_V0_VA;
	}

	return ret;
	}

	static int
	nvkm_ioctl_unmap(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_unmap none;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "unmap size %d\n", size);
	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
	nvif_ioctl(object, "unmap\n");
	ret = nvkm_object_unmap(object);
	}

	return ret;
	}

	static int
	nvkm_ioctl_ntfy_new(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_ntfy_new_v0 v0;
	} *args = data;
	struct nvkm_event *event;
	int ret = -ENOSYS;

	nvif_ioctl(object, "ntfy new size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
	nvif_ioctl(object, "ntfy new vers %d event %02x\n",
	args->v0.version, args->v0.event);
	ret = nvkm_object_ntfy(object, args->v0.event, &event);
	if (ret == 0) {
	ret = nvkm_client_notify_new(object, event, data, size);
	if (ret >= 0) {
	args->v0.index = ret;
	ret = 0;
	}
	}
	}

	return ret;
	}

	static int
	nvkm_ioctl_ntfy_del(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_ntfy_del_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "ntfy del size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object, "ntfy del vers %d index %d\n",
	args->v0.version, args->v0.index);
	ret = nvkm_client_notify_del(client, args->v0.index);
	}

	return ret;
	}

	static int
	nvkm_ioctl_ntfy_get(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_ntfy_get_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "ntfy get size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object, "ntfy get vers %d index %d\n",
	args->v0.version, args->v0.index);
	ret = nvkm_client_notify_get(client, args->v0.index);
	}

	return ret;
	}

	static int
	nvkm_ioctl_ntfy_put(struct nvkm_client *client,
	struct nvkm_object object, void data, u32 size)
	{
	union {
	struct nvif_ioctl_ntfy_put_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "ntfy put size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
	nvif_ioctl(object, "ntfy put vers %d index %d\n",
	args->v0.version, args->v0.index);
	ret = nvkm_client_notify_put(client, args->v0.index);
	}

	return ret;
	}

	static struct {
	int version;
	int (func)(struct nvkm_client , struct nvkm_object , void , u32);
	}
	nvkm_ioctl_v0[] = {
	{ 0x00, nvkm_ioctl_nop },
	{ 0x00, nvkm_ioctl_sclass },
	{ 0x00, nvkm_ioctl_new },
	{ 0x00, nvkm_ioctl_del },
	{ 0x00, nvkm_ioctl_mthd },
	{ 0x00, nvkm_ioctl_rd },
	{ 0x00, nvkm_ioctl_wr },
	{ 0x00, nvkm_ioctl_map },
	{ 0x00, nvkm_ioctl_unmap },
	{ 0x00, nvkm_ioctl_ntfy_new },
	{ 0x00, nvkm_ioctl_ntfy_del },
	{ 0x00, nvkm_ioctl_ntfy_get },
	{ 0x00, nvkm_ioctl_ntfy_put },
	};

	static int
	nvkm_ioctl_path(struct nvkm_client *client, u64 handle, u32 type,
	void data, u32 size, u8 owner, u8 route, u64 *token)
	{
	struct nvkm_object *object;
	int ret;

	object = nvkm_object_search(client, handle, NULL);
	if (IS_ERR(object)) {
	nvif_ioctl(&client->object, "object not found\n");
	return PTR_ERR(object);
	}

	if (owner != NVIF_IOCTL_V0_OWNER_ANY && owner != object->route) {
	nvif_ioctl(&client->object, "route != owner\n");
	return -EACCES;
	}
	*route = object->route;
	*token = object->token;

	if (ret = -EINVAL, type < ARRAY_SIZE(nvkm_ioctl_v0)) {
	if (nvkm_ioctl_v0[type].version == 0)
	ret = nvkm_ioctl_v0[type].func(client, object, data, size);
	}

	return ret;
	}

	int
	nvkm_ioctl(struct nvkm_client client, void data, u32 size, void **hack)
	{
	struct nvkm_object *object = &client->object;
	union {
	struct nvif_ioctl_v0 v0;
	} *args = data;
	int ret = -ENOSYS;

	nvif_ioctl(object, "size %d\n", size);

	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
	nvif_ioctl(object,
	"vers %d type %02x object %016llx owner %02x\n",
	args->v0.version, args->v0.type, args->v0.object,
	args->v0.owner);
	ret = nvkm_ioctl_path(client, args->v0.object, args->v0.type,
	data, size, args->v0.owner,
	&args->v0.route, &args->v0.token);
	}

	if (ret != 1) {
	nvif_ioctl(object, "return %d\n", ret);
	if (hack) {
	*hack = client->data;
	client->data = NULL;
	}
	}

	return ret;
	}