drm: remove symlinks from build, use Kbuild files for lib build

The DRM build used a separate, symlinked, source tree out of a desire
to avoid Kbuild/autotools' object files conflicting.

Not only is this very annoying to maintain, but it's made worse by
having two entirely separate source file lists to maintain too.

Fixes both these issues by ditching automake (it doesn't approve of
the kernel's Kbuild syntax) in favour of custom makefiles that can
build libnvif.so from the Kbuild files.

Like the previous commit, this will never show up in the kernel tree
(it has its own version).

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

5 files changed, 764 insertions, 0 deletions

diff --git a/drm/nouveau/nvif/Kbuild b/drm/nouveau/nvif/Kbuild
new file mode 100644
index 000000000..ff8ed3a04
--- /dev/null
+++ b/drm/nouveau/nvif/Kbuild
@@ -0,0 +1,4 @@
+nvif-y := nvif/object.o
+nvif-y += nvif/client.o
+nvif-y += nvif/device.o
+nvif-y += nvif/notify.o
diff --git a/drm/nouveau/nvif/client.c b/drm/nouveau/nvif/client.c
new file mode 100644
index 000000000..80b968442
--- /dev/null
+++ b/drm/nouveau/nvif/client.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2013 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 <nvif/client.h>
+#include <nvif/driver.h>
+#include <nvif/ioctl.h>
+
+int
+nvif_client_ioctl(struct nvif_client *client, void *data, u32 size)
+{
+	return client->driver->ioctl(client->base.priv, client->super, data, size, NULL);
+}
+
+int
+nvif_client_suspend(struct nvif_client *client)
+{
+	return client->driver->suspend(client->base.priv);
+}
+
+int
+nvif_client_resume(struct nvif_client *client)
+{
+	return client->driver->resume(client->base.priv);
+}
+
+void
+nvif_client_fini(struct nvif_client *client)
+{
+	if (client->driver) {
+		client->driver->fini(client->base.priv);
+		client->driver = NULL;
+		client->base.parent = NULL;
+		nvif_object_fini(&client->base);
+	}
+}
+
+const struct nvif_driver *
+nvif_drivers[] = {
+#ifdef __KERNEL__
+	&nvif_driver_nvkm,
+#else
+	&nvif_driver_drm,
+	&nvif_driver_lib,
+	&nvif_driver_null,
+#endif
+	NULL
+};
+
+int
+nvif_client_init(void (*dtor)(struct nvif_client *), const char *driver,
+		 const char *name, u64 device, const char *cfg, const char *dbg,
+		 struct nvif_client *client)
+{
+	int ret, i;
+
+	ret = nvif_object_init(NULL, (void*)dtor, 0, 0, NULL, 0, &client->base);
+	if (ret)
+		return ret;
+
+	client->base.parent = &client->base;
+	client->base.handle = ~0;
+	client->object = &client->base;
+	client->super = true;
+
+	for (i = 0, ret = -EINVAL; (client->driver = nvif_drivers[i]); i++) {
+		if (!driver || !strcmp(client->driver->name, driver)) {
+			ret = client->driver->init(name, device, cfg, dbg,
+						  &client->base.priv);
+			if (!ret || driver)
+				break;
+		}
+	}
+
+	if (ret)
+		nvif_client_fini(client);
+	return ret;
+}
+
+static void
+nvif_client_del(struct nvif_client *client)
+{
+	nvif_client_fini(client);
+	kfree(client);
+}
+
+int
+nvif_client_new(const char *driver, const char *name, u64 device,
+		const char *cfg, const char *dbg,
+		struct nvif_client **pclient)
+{
+	struct nvif_client *client = kzalloc(sizeof(*client), GFP_KERNEL);
+	if (client) {
+		int ret = nvif_client_init(nvif_client_del, driver, name,
+					   device, cfg, dbg, client);
+		if (ret) {
+			kfree(client);
+			client = NULL;
+		}
+		*pclient = client;
+		return ret;
+	}
+	return -ENOMEM;
+}
+
+void
+nvif_client_ref(struct nvif_client *client, struct nvif_client **pclient)
+{
+	nvif_object_ref(&client->base, (struct nvif_object **)pclient);
+}
diff --git a/drm/nouveau/nvif/device.c b/drm/nouveau/nvif/device.c
new file mode 100644
index 000000000..6f72244c5
--- /dev/null
+++ b/drm/nouveau/nvif/device.c
@@ -0,0 +1,78 @@
+/*
+ * 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 <nvif/device.h>
+
+void
+nvif_device_fini(struct nvif_device *device)
+{
+	nvif_object_fini(&device->base);
+}
+
+int
+nvif_device_init(struct nvif_object *parent, void (*dtor)(struct nvif_device *),
+		 u32 handle, u32 oclass, void *data, u32 size,
+		 struct nvif_device *device)
+{
+	int ret = nvif_object_init(parent, (void *)dtor, handle, oclass,
+				   data, size, &device->base);
+	if (ret == 0) {
+		device->object = &device->base;
+		device->info.version = 0;
+		ret = nvif_object_mthd(&device->base, NV_DEVICE_V0_INFO,
+				       &device->info, sizeof(device->info));
+	}
+	return ret;
+}
+
+static void
+nvif_device_del(struct nvif_device *device)
+{
+	nvif_device_fini(device);
+	kfree(device);
+}
+
+int
+nvif_device_new(struct nvif_object *parent, u32 handle, u32 oclass,
+		void *data, u32 size, struct nvif_device **pdevice)
+{
+	struct nvif_device *device = kzalloc(sizeof(*device), GFP_KERNEL);
+	if (device) {
+		int ret = nvif_device_init(parent, nvif_device_del, handle,
+					   oclass, data, size, device);
+		if (ret) {
+			kfree(device);
+			device = NULL;
+		}
+		*pdevice = device;
+		return ret;
+	}
+	return -ENOMEM;
+}
+
+void
+nvif_device_ref(struct nvif_device *device, struct nvif_device **pdevice)
+{
+	nvif_object_ref(&device->base, (struct nvif_object **)pdevice);
+}
diff --git a/drm/nouveau/nvif/notify.c b/drm/nouveau/nvif/notify.c
new file mode 100644
index 000000000..0898c3155
--- /dev/null
+++ b/drm/nouveau/nvif/notify.c
@@ -0,0 +1,248 @@
+/*
+ * 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 <nvif/client.h>
+#include <nvif/driver.h>
+#include <nvif/notify.h>
+#include <nvif/object.h>
+#include <nvif/ioctl.h>
+#include <nvif/event.h>
+
+static inline int
+nvif_notify_put_(struct nvif_notify *notify)
+{
+	struct nvif_object *object = notify->object;
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_ntfy_put_v0 ntfy;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_NTFY_PUT,
+		.ntfy.index = notify->index,
+	};
+
+	if (atomic_inc_return(&notify->putcnt) != 1)
+		return 0;
+
+	return nvif_object_ioctl(object, &args, sizeof(args), NULL);
+}
+
+int
+nvif_notify_put(struct nvif_notify *notify)
+{
+	if (likely(notify->object) &&
+	    test_and_clear_bit(NVIF_NOTIFY_USER, &notify->flags)) {
+		int ret = nvif_notify_put_(notify);
+		if (test_bit(NVIF_NOTIFY_WORK, &notify->flags))
+			flush_work(&notify->work);
+		return ret;
+	}
+	return 0;
+}
+
+static inline int
+nvif_notify_get_(struct nvif_notify *notify)
+{
+	struct nvif_object *object = notify->object;
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_ntfy_get_v0 ntfy;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_NTFY_GET,
+		.ntfy.index = notify->index,
+	};
+
+	if (atomic_dec_return(&notify->putcnt) != 0)
+		return 0;
+
+	return nvif_object_ioctl(object, &args, sizeof(args), NULL);
+}
+
+int
+nvif_notify_get(struct nvif_notify *notify)
+{
+	if (likely(notify->object) &&
+	    !test_and_set_bit(NVIF_NOTIFY_USER, &notify->flags))
+		return nvif_notify_get_(notify);
+	return 0;
+}
+
+static inline int
+nvif_notify_func(struct nvif_notify *notify, bool keep)
+{
+	int ret = notify->func(notify);
+	if (ret == NVIF_NOTIFY_KEEP ||
+	    !test_and_clear_bit(NVKM_NOTIFY_USER, &notify->flags)) {
+		if (!keep)
+			atomic_dec(&notify->putcnt);
+		else
+			nvif_notify_get_(notify);
+	}
+	return ret;
+}
+
+static void
+nvif_notify_work(struct work_struct *work)
+{
+	struct nvif_notify *notify = container_of(work, typeof(*notify), work);
+	nvif_notify_func(notify, true);
+}
+
+int
+nvif_notify(const void *header, u32 length, const void *data, u32 size)
+{
+	struct nvif_notify *notify = NULL;
+	const union {
+		struct nvif_notify_rep_v0 v0;
+	} *args = header;
+	int ret = NVIF_NOTIFY_DROP;
+
+	if (length == sizeof(args->v0) && args->v0.version == 0) {
+		if (WARN_ON(args->v0.route))
+			return NVIF_NOTIFY_DROP;
+		notify = (void *)(unsigned long)args->v0.token;
+	}
+
+	if (!WARN_ON(notify == NULL)) {
+		struct nvif_client *client = nvif_client(notify->object);
+		if (!WARN_ON(notify->size != size)) {
+			atomic_inc(&notify->putcnt);
+			if (test_bit(NVIF_NOTIFY_WORK, &notify->flags)) {
+				memcpy((void *)notify->data, data, size);
+				schedule_work(&notify->work);
+				return NVIF_NOTIFY_DROP;
+			}
+			notify->data = data;
+			ret = nvif_notify_func(notify, client->driver->keep);
+			notify->data = NULL;
+		}
+	}
+
+	return ret;
+}
+
+int
+nvif_notify_fini(struct nvif_notify *notify)
+{
+	struct nvif_object *object = notify->object;
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_ntfy_del_v0 ntfy;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_NTFY_DEL,
+		.ntfy.index = notify->index,
+	};
+	int ret = nvif_notify_put(notify);
+	if (ret >= 0 && object) {
+		ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
+		if (ret == 0) {
+			nvif_object_ref(NULL, &notify->object);
+			kfree((void *)notify->data);
+		}
+	}
+	return ret;
+}
+
+int
+nvif_notify_init(struct nvif_object *object, void (*dtor)(struct nvif_notify *),
+		 int (*func)(struct nvif_notify *), bool work, u8 event,
+		 void *data, u32 size, u32 reply, struct nvif_notify *notify)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_ntfy_new_v0 ntfy;
+		struct nvif_notify_req_v0 req;
+	} *args;
+	int ret = -ENOMEM;
+
+	notify->object = NULL;
+	nvif_object_ref(object, &notify->object);
+	notify->flags = 0;
+	atomic_set(&notify->putcnt, 1);
+	notify->dtor = dtor;
+	notify->func = func;
+	notify->data = NULL;
+	notify->size = reply;
+	if (work) {
+		INIT_WORK(&notify->work, nvif_notify_work);
+		set_bit(NVIF_NOTIFY_WORK, &notify->flags);
+		notify->data = kmalloc(notify->size, GFP_KERNEL);
+		if (!notify->data)
+			goto done;
+	}
+
+	if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
+		goto done;
+	args->ioctl.version = 0;
+	args->ioctl.type = NVIF_IOCTL_V0_NTFY_NEW;
+	args->ntfy.version = 0;
+	args->ntfy.event = event;
+	args->req.version = 0;
+	args->req.reply = notify->size;
+	args->req.route = 0;
+	args->req.token = (unsigned long)(void *)notify;
+
+	memcpy(args->req.data, data, size);
+	ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
+	notify->index = args->ntfy.index;
+	kfree(args);
+done:
+	if (ret)
+		nvif_notify_fini(notify);
+	return ret;
+}
+
+static void
+nvif_notify_del(struct nvif_notify *notify)
+{
+	nvif_notify_fini(notify);
+	kfree(notify);
+}
+
+void
+nvif_notify_ref(struct nvif_notify *notify, struct nvif_notify **pnotify)
+{
+	BUG_ON(notify != NULL);
+	if (*pnotify)
+		(*pnotify)->dtor(*pnotify);
+	*pnotify = notify;
+}
+
+int
+nvif_notify_new(struct nvif_object *object, int (*func)(struct nvif_notify *),
+		bool work, u8 type, void *data, u32 size, u32 reply,
+		struct nvif_notify **pnotify)
+{
+	struct nvif_notify *notify = kzalloc(sizeof(*notify), GFP_KERNEL);
+	if (notify) {
+		int ret = nvif_notify_init(object, nvif_notify_del, func, work,
+					   type, data, size, reply, notify);
+		if (ret) {
+			kfree(notify);
+			notify = NULL;
+		}
+		*pnotify = notify;
+		return ret;
+	}
+	return -ENOMEM;
+}
diff --git a/drm/nouveau/nvif/object.c b/drm/nouveau/nvif/object.c
new file mode 100644
index 000000000..3ab4e2f8c
--- /dev/null
+++ b/drm/nouveau/nvif/object.c
@@ -0,0 +1,304 @@
+/*
+ * 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 <nvif/object.h>
+#include <nvif/client.h>
+#include <nvif/driver.h>
+#include <nvif/ioctl.h>
+
+int
+nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack)
+{
+	struct nvif_client *client = nvif_client(object);
+	union {
+		struct nvif_ioctl_v0 v0;
+	} *args = data;
+
+	if (size >= sizeof(*args) && args->v0.version == 0) {
+		args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
+		args->v0.path_nr = 0;
+		while (args->v0.path_nr < ARRAY_SIZE(args->v0.path)) {
+			args->v0.path[args->v0.path_nr++] = object->handle;
+			if (object->parent == object)
+				break;
+			object = object->parent;
+		}
+	} else
+		return -ENOSYS;
+
+	return client->driver->ioctl(client->base.priv, client->super, data, size, hack);
+}
+
+int
+nvif_object_sclass(struct nvif_object *object, u32 *oclass, int count)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_sclass_v0 sclass;
+	} *args;
+	u32 size = count * sizeof(args->sclass.oclass[0]);
+	int ret;
+
+	if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
+		return -ENOMEM;
+	args->ioctl.version = 0;
+	args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
+	args->sclass.version = 0;
+	args->sclass.count = count;
+
+	memcpy(args->sclass.oclass, oclass, size);
+	ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
+	ret = ret ? ret : args->sclass.count;
+	memcpy(oclass, args->sclass.oclass, size);
+	kfree(args);
+	return ret;
+}
+
+u32
+nvif_object_rd(struct nvif_object *object, int size, u64 addr)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_rd_v0 rd;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_RD,
+		.rd.size = size,
+		.rd.addr = addr,
+	};
+	int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
+	if (ret) {
+		/*XXX: warn? */
+		return 0;
+	}
+	return args.rd.data;
+}
+
+void
+nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_wr_v0 wr;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_WR,
+		.wr.size = size,
+		.wr.addr = addr,
+		.wr.data = data,
+	};
+	int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
+	if (ret) {
+		/*XXX: warn? */
+	}
+}
+
+int
+nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_mthd_v0 mthd;
+	} *args;
+	u8 stack[128];
+	int ret;
+
+	if (sizeof(*args) + size > sizeof(stack)) {
+		if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
+			return -ENOMEM;
+	} else {
+		args = (void *)stack;
+	}
+	args->ioctl.version = 0;
+	args->ioctl.type = NVIF_IOCTL_V0_MTHD;
+	args->mthd.version = 0;
+	args->mthd.method = mthd;
+
+	memcpy(args->mthd.data, data, size);
+	ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
+	memcpy(data, args->mthd.data, size);
+	if (args != (void *)stack)
+		kfree(args);
+	return ret;
+}
+
+void
+nvif_object_unmap(struct nvif_object *object)
+{
+	if (object->map.size) {
+		struct nvif_client *client = nvif_client(object);
+		struct {
+			struct nvif_ioctl_v0 ioctl;
+			struct nvif_ioctl_unmap unmap;
+		} args = {
+			.ioctl.type = NVIF_IOCTL_V0_UNMAP,
+		};
+
+		if (object->map.ptr) {
+			client->driver->unmap(client, object->map.ptr,
+						      object->map.size);
+			object->map.ptr = NULL;
+		}
+
+		nvif_object_ioctl(object, &args, sizeof(args), NULL);
+		object->map.size = 0;
+	}
+}
+
+int
+nvif_object_map(struct nvif_object *object)
+{
+	struct nvif_client *client = nvif_client(object);
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_map_v0 map;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_MAP,
+	};
+	int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
+	if (ret == 0) {
+		object->map.size = args.map.length;
+		object->map.ptr = client->driver->map(client, args.map.handle,
+						      object->map.size);
+		if (ret = -ENOMEM, object->map.ptr)
+			return 0;
+		nvif_object_unmap(object);
+	}
+	return ret;
+}
+
+struct ctor {
+	struct nvif_ioctl_v0 ioctl;
+	struct nvif_ioctl_new_v0 new;
+};
+
+void
+nvif_object_fini(struct nvif_object *object)
+{
+	struct ctor *ctor = container_of(object->data, typeof(*ctor), new.data);
+	if (object->parent) {
+		struct {
+			struct nvif_ioctl_v0 ioctl;
+			struct nvif_ioctl_del del;
+		} args = {
+			.ioctl.type = NVIF_IOCTL_V0_DEL,
+		};
+
+		nvif_object_unmap(object);
+		nvif_object_ioctl(object, &args, sizeof(args), NULL);
+		if (object->data) {
+			object->size = 0;
+			object->data = NULL;
+			kfree(ctor);
+		}
+		nvif_object_ref(NULL, &object->parent);
+	}
+}
+
+int
+nvif_object_init(struct nvif_object *parent, void (*dtor)(struct nvif_object *),
+		 u32 handle, u32 oclass, void *data, u32 size,
+		 struct nvif_object *object)
+{
+	struct ctor *ctor;
+	int ret = 0;
+
+	object->parent = NULL;
+	object->object = object;
+	nvif_object_ref(parent, &object->parent);
+	kref_init(&object->refcount);
+	object->handle = handle;
+	object->oclass = oclass;
+	object->data = NULL;
+	object->size = 0;
+	object->dtor = dtor;
+	object->map.ptr = NULL;
+	object->map.size = 0;
+
+	if (object->parent) {
+		if (!(ctor = kmalloc(sizeof(*ctor) + size, GFP_KERNEL))) {
+			nvif_object_fini(object);
+			return -ENOMEM;
+		}
+		object->data = ctor->new.data;
+		object->size = size;
+		memcpy(object->data, data, size);
+
+		ctor->ioctl.version = 0;
+		ctor->ioctl.type = NVIF_IOCTL_V0_NEW;
+		ctor->new.version = 0;
+		ctor->new.route = NVIF_IOCTL_V0_ROUTE_NVIF;
+		ctor->new.token = (unsigned long)(void *)object;
+		ctor->new.handle = handle;
+		ctor->new.oclass = oclass;
+
+		ret = nvif_object_ioctl(parent, ctor, sizeof(*ctor) +
+					object->size, &object->priv);
+	}
+
+	if (ret)
+		nvif_object_fini(object);
+	return ret;
+}
+
+static void
+nvif_object_del(struct nvif_object *object)
+{
+	nvif_object_fini(object);
+	kfree(object);
+}
+
+int
+nvif_object_new(struct nvif_object *parent, u32 handle, u32 oclass,
+		void *data, u32 size, struct nvif_object **pobject)
+{
+	struct nvif_object *object = kzalloc(sizeof(*object), GFP_KERNEL);
+	if (object) {
+		int ret = nvif_object_init(parent, nvif_object_del, handle,
+					   oclass, data, size, object);
+		if (ret) {
+			kfree(object);
+			object = NULL;
+		}
+		*pobject = object;
+		return ret;
+	}
+	return -ENOMEM;
+}
+
+static void
+nvif_object_put(struct kref *kref)
+{
+	struct nvif_object *object =
+		container_of(kref, typeof(*object), refcount);
+	object->dtor(object);
+}
+
+void
+nvif_object_ref(struct nvif_object *object, struct nvif_object **pobject)
+{
+	if (object)
+		kref_get(&object->refcount);
+	if (*pobject)
+		kref_put(&(*pobject)->refcount, nvif_object_put);
+	*pobject = object;
+}