[linux-2.6-block.git] / drivers / gpu / drm / nouveau / nouveau_usif.c

/*
 * 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 "nouveau_drv.h"
#include "nouveau_usif.h"
#include "nouveau_abi16.h"

#include <nvif/notify.h>
#include <nvif/unpack.h>
#include <nvif/client.h>
#include <nvif/event.h>
#include <nvif/ioctl.h>

struct usif_notify_p {
	struct drm_pending_event base;
	struct {
		struct drm_event base;
		u8 data[];
	} e;
};

struct usif_notify {
	struct list_head head;
	atomic_t enabled;
	u32 handle;
	u16 reply;
	u8  route;
	u64 token;
	struct usif_notify_p *p;
};

static inline struct usif_notify *
usif_notify_find(struct drm_file *filp, u32 handle)
{
	struct nouveau_cli *cli = nouveau_cli(filp);
	struct usif_notify *ntfy;
	list_for_each_entry(ntfy, &cli->notifys, head) {
		if (ntfy->handle == handle)
			return ntfy;
	}
	return NULL;
}

static inline void
usif_notify_dtor(struct usif_notify *ntfy)
{
	list_del(&ntfy->head);
	kfree(ntfy);
}

int
usif_notify(const void *header, u32 length, const void *data, u32 size)
{
	struct usif_notify *ntfy = NULL;
	const union {
		struct nvif_notify_rep_v0 v0;
	} *rep = header;
	struct drm_device *dev;
	struct drm_file *filp;
	unsigned long flags;

	if (length == sizeof(rep->v0) && rep->v0.version == 0) {
		if (WARN_ON(!(ntfy = (void *)(unsigned long)rep->v0.token)))
			return NVIF_NOTIFY_DROP;
		BUG_ON(rep->v0.route != NVDRM_NOTIFY_USIF);
	} else
	if (WARN_ON(1))
		return NVIF_NOTIFY_DROP;

	if (WARN_ON(!ntfy->p || ntfy->reply != (length + size)))
		return NVIF_NOTIFY_DROP;
	filp = ntfy->p->base.file_priv;
	dev = filp->minor->dev;

	memcpy(&ntfy->p->e.data[0], header, length);
	memcpy(&ntfy->p->e.data[length], data, size);
	switch (rep->v0.version) {
	case 0: {
		struct nvif_notify_rep_v0 *rep = (void *)ntfy->p->e.data;
		rep->route = ntfy->route;
		rep->token = ntfy->token;
	}
		break;
	default:
		BUG_ON(1);
		break;
	}

	spin_lock_irqsave(&dev->event_lock, flags);
	if (!WARN_ON(filp->event_space < ntfy->p->e.base.length)) {
		list_add_tail(&ntfy->p->base.link, &filp->event_list);
		filp->event_space -= ntfy->p->e.base.length;
	}
	wake_up_interruptible(&filp->event_wait);
	spin_unlock_irqrestore(&dev->event_lock, flags);
	atomic_set(&ntfy->enabled, 0);
	return NVIF_NOTIFY_DROP;
}

static int
usif_notify_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
{
	struct nouveau_cli *cli = nouveau_cli(f);
	struct nvif_client *client = &cli->base;
	union {
		struct nvif_ioctl_ntfy_new_v0 v0;
	} *args = data;
	union {
		struct nvif_notify_req_v0 v0;
	} *req;
	struct usif_notify *ntfy;
	int ret = -ENOSYS;

	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
		if (usif_notify_find(f, args->v0.index))
			return -EEXIST;
	} else
		return ret;
	req = data;
	ret = -ENOSYS;

	if (!(ntfy = kmalloc(sizeof(*ntfy), GFP_KERNEL)))
		return -ENOMEM;
	atomic_set(&ntfy->enabled, 0);

	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, true))) {
		ntfy->reply = sizeof(struct nvif_notify_rep_v0) + req->v0.reply;
		ntfy->route = req->v0.route;
		ntfy->token = req->v0.token;
		req->v0.route = NVDRM_NOTIFY_USIF;
		req->v0.token = (unsigned long)(void *)ntfy;
		ret = nvif_client_ioctl(client, argv, argc);
		req->v0.token = ntfy->token;
		req->v0.route = ntfy->route;
		ntfy->handle = args->v0.index;
	}

	if (ret == 0)
		list_add(&ntfy->head, &cli->notifys);
	if (ret)
		kfree(ntfy);
	return ret;
}

static int
usif_notify_del(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
{
	struct nouveau_cli *cli = nouveau_cli(f);
	struct nvif_client *client = &cli->base;
	union {
		struct nvif_ioctl_ntfy_del_v0 v0;
	} *args = data;
	struct usif_notify *ntfy;
	int ret = -ENOSYS;

	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
		if (!(ntfy = usif_notify_find(f, args->v0.index)))
			return -ENOENT;
	} else
		return ret;

	ret = nvif_client_ioctl(client, argv, argc);
	if (ret == 0)
		usif_notify_dtor(ntfy);
	return ret;
}

static int
usif_notify_get(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
{
	struct nouveau_cli *cli = nouveau_cli(f);
	struct nvif_client *client = &cli->base;
	union {
		struct nvif_ioctl_ntfy_del_v0 v0;
	} *args = data;
	struct usif_notify *ntfy;
	int ret = -ENOSYS;

	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
		if (!(ntfy = usif_notify_find(f, args->v0.index)))
			return -ENOENT;
	} else
		return ret;

	if (atomic_xchg(&ntfy->enabled, 1))
		return 0;

	ntfy->p = kmalloc(sizeof(*ntfy->p) + ntfy->reply, GFP_KERNEL);
	if (ret = -ENOMEM, !ntfy->p)
		goto done;
	ntfy->p->base.event = &ntfy->p->e.base;
	ntfy->p->base.file_priv = f;
	ntfy->p->base.pid = current->pid;
	ntfy->p->base.destroy =(void(*)(struct drm_pending_event *))kfree;
	ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF;
	ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply;

	ret = nvif_client_ioctl(client, argv, argc);
done:
	if (ret) {
		atomic_set(&ntfy->enabled, 0);
		kfree(ntfy->p);
	}
	return ret;
}

static int
usif_notify_put(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
{
	struct nouveau_cli *cli = nouveau_cli(f);
	struct nvif_client *client = &cli->base;
	union {
		struct nvif_ioctl_ntfy_put_v0 v0;
	} *args = data;
	struct usif_notify *ntfy;
	int ret = -ENOSYS;

	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
		if (!(ntfy = usif_notify_find(f, args->v0.index)))
			return -ENOENT;
	} else
		return ret;

	ret = nvif_client_ioctl(client, argv, argc);
	if (ret == 0 && atomic_xchg(&ntfy->enabled, 0))
		kfree(ntfy->p);
	return ret;
}

struct usif_object {
	struct list_head head;
	struct list_head ntfy;
	u8  route;
	u64 token;
};

static void
usif_object_dtor(struct usif_object *object)
{
	list_del(&object->head);
	kfree(object);
}

static int
usif_object_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
{
	struct nouveau_cli *cli = nouveau_cli(f);
	struct nvif_client *client = &cli->base;
	union {
		struct nvif_ioctl_new_v0 v0;
	} *args = data;
	struct usif_object *object;
	int ret = -ENOSYS;

	if (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
		return -ENOMEM;
	list_add(&object->head, &cli->objects);

	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
		object->route = args->v0.route;
		object->token = args->v0.token;
		args->v0.route = NVDRM_OBJECT_USIF;
		args->v0.token = (unsigned long)(void *)object;
		ret = nvif_client_ioctl(client, argv, argc);
		args->v0.token = object->token;
		args->v0.route = object->route;
	}

	if (ret)
		usif_object_dtor(object);
	return ret;
}

int
usif_ioctl(struct drm_file *filp, void __user *user, u32 argc)
{
	struct nouveau_cli *cli = nouveau_cli(filp);
	struct nvif_client *client = &cli->base;
	void *data = kmalloc(argc, GFP_KERNEL);
	u32   size = argc;
	union {
		struct nvif_ioctl_v0 v0;
	} *argv = data;
	struct usif_object *object;
	u8 owner;
	int ret;

	if (ret = -ENOMEM, !argv)
		goto done;
	if (ret = -EFAULT, copy_from_user(argv, user, size))
		goto done;

	if (!(ret = nvif_unpack(-ENOSYS, &data, &size, argv->v0, 0, 0, true))) {
		/* block access to objects not created via this interface */
		owner = argv->v0.owner;
		if (argv->v0.object == 0ULL)
			argv->v0.owner = NVDRM_OBJECT_ANY; /* except client */
		else
			argv->v0.owner = NVDRM_OBJECT_USIF;
	} else
		goto done;

	/* USIF slightly abuses some return-only ioctl members in order
	 * to provide interoperability with the older ABI16 objects
	 */
	mutex_lock(&cli->mutex);
	if (argv->v0.route) {
		if (ret = -EINVAL, argv->v0.route == 0xff)
			ret = nouveau_abi16_usif(filp, argv, argc);
		if (ret) {
			mutex_unlock(&cli->mutex);
			goto done;
		}
	}

	switch (argv->v0.type) {
	case NVIF_IOCTL_V0_NEW:
		ret = usif_object_new(filp, data, size, argv, argc);
		break;
	case NVIF_IOCTL_V0_NTFY_NEW:
		ret = usif_notify_new(filp, data, size, argv, argc);
		break;
	case NVIF_IOCTL_V0_NTFY_DEL:
		ret = usif_notify_del(filp, data, size, argv, argc);
		break;
	case NVIF_IOCTL_V0_NTFY_GET:
		ret = usif_notify_get(filp, data, size, argv, argc);
		break;
	case NVIF_IOCTL_V0_NTFY_PUT:
		ret = usif_notify_put(filp, data, size, argv, argc);
		break;
	default:
		ret = nvif_client_ioctl(client, argv, argc);
		break;
	}
	if (argv->v0.route == NVDRM_OBJECT_USIF) {
		object = (void *)(unsigned long)argv->v0.token;
		argv->v0.route = object->route;
		argv->v0.token = object->token;
		if (ret == 0 && argv->v0.type == NVIF_IOCTL_V0_DEL) {
			list_del(&object->head);
			kfree(object);
		}
	} else {
		argv->v0.route = NVIF_IOCTL_V0_ROUTE_HIDDEN;
		argv->v0.token = 0;
	}
	argv->v0.owner = owner;
	mutex_unlock(&cli->mutex);

	if (copy_to_user(user, argv, argc))
		ret = -EFAULT;
done:
	kfree(argv);
	return ret;
}

void
usif_client_fini(struct nouveau_cli *cli)
{
	struct usif_object *object, *otemp;
	struct usif_notify *notify, *ntemp;

	list_for_each_entry_safe(notify, ntemp, &cli->notifys, head) {
		usif_notify_dtor(notify);
	}

	list_for_each_entry_safe(object, otemp, &cli->objects, head) {
		usif_object_dtor(object);
	}
}

void
usif_client_init(struct nouveau_cli *cli)
{
	INIT_LIST_HEAD(&cli->objects);
	INIT_LIST_HEAD(&cli->notifys);
}
Commit	Line	Data
27111a23 BS	1	/*
	2	* Copyright 2014 Red Hat Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	* Authors: Ben Skeggs <bskeggs@redhat.com>
	23	*/
	24
4dc28134	25	#include "nouveau_drv.h"
27111a23	26	#include "nouveau_usif.h"
2621a416	27	#include "nouveau_abi16.h"
27111a23 BS	28
	29	#include <nvif/notify.h>
	30	#include <nvif/unpack.h>
	31	#include <nvif/client.h>
	32	#include <nvif/event.h>
	33	#include <nvif/ioctl.h>
	34
	35	struct usif_notify_p {
	36	struct drm_pending_event base;
	37	struct {
	38	struct drm_event base;
	39	u8 data[];
	40	} e;
	41	};
	42
	43	struct usif_notify {
	44	struct list_head head;
	45	atomic_t enabled;
	46	u32 handle;
	47	u16 reply;
	48	u8 route;
	49	u64 token;
	50	struct usif_notify_p *p;
	51	};
	52
	53	static inline struct usif_notify *
	54	usif_notify_find(struct drm_file *filp, u32 handle)
	55	{
	56	struct nouveau_cli *cli = nouveau_cli(filp);
	57	struct usif_notify *ntfy;
	58	list_for_each_entry(ntfy, &cli->notifys, head) {
	59	if (ntfy->handle == handle)
	60	return ntfy;
	61	}
	62	return NULL;
	63	}
	64
	65	static inline void
	66	usif_notify_dtor(struct usif_notify *ntfy)
	67	{
	68	list_del(&ntfy->head);
	69	kfree(ntfy);
	70	}
	71
	72	int
	73	usif_notify(const void header, u32 length, const void data, u32 size)
	74	{
	75	struct usif_notify *ntfy = NULL;
	76	const union {
	77	struct nvif_notify_rep_v0 v0;
	78	} *rep = header;
	79	struct drm_device *dev;
	80	struct drm_file *filp;
	81	unsigned long flags;
	82
	83	if (length == sizeof(rep->v0) && rep->v0.version == 0) {
	84	if (WARN_ON(!(ntfy = (void *)(unsigned long)rep->v0.token)))
	85	return NVIF_NOTIFY_DROP;
	86	BUG_ON(rep->v0.route != NVDRM_NOTIFY_USIF);
	87	} else
	88	if (WARN_ON(1))
	89	return NVIF_NOTIFY_DROP;
	90
	91	if (WARN_ON(!ntfy->p \|\| ntfy->reply != (length + size)))
92	return NVIF_NOTIFY_DROP;
93	filp = ntfy->p->base.file_priv;
94	dev = filp->minor->dev;
95
96	memcpy(&ntfy->p->e.data[0], header, length);
97	memcpy(&ntfy->p->e.data[length], data, size);
98	switch (rep->v0.version) {
99	case 0: {
100	struct nvif_notify_rep_v0 rep = (void )ntfy->p->e.data;
101	rep->route = ntfy->route;
102	rep->token = ntfy->token;
103	}
104	break;
105	default:
106	BUG_ON(1);
107	break;
108	}
109
110	spin_lock_irqsave(&dev->event_lock, flags);
111	if (!WARN_ON(filp->event_space < ntfy->p->e.base.length)) {
112	list_add_tail(&ntfy->p->base.link, &filp->event_list);
113	filp->event_space -= ntfy->p->e.base.length;
114	}
115	wake_up_interruptible(&filp->event_wait);
116	spin_unlock_irqrestore(&dev->event_lock, flags);
117	atomic_set(&ntfy->enabled, 0);
118	return NVIF_NOTIFY_DROP;
119	}
120
121	static int
122	usif_notify_new(struct drm_file f, void data, u32 size, void *argv, u32 argc)
123	{
124	struct nouveau_cli *cli = nouveau_cli(f);
125	struct nvif_client *client = &cli->base;
126	union {
127	struct nvif_ioctl_ntfy_new_v0 v0;
128	} *args = data;
129	union {
130	struct nvif_notify_req_v0 v0;
131	} *req;
132	struct usif_notify *ntfy;
f01c4e68	133	int ret = -ENOSYS;
27111a23	134
f01c4e68	135	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
27111a23 BS	136	if (usif_notify_find(f, args->v0.index))
	137	return -EEXIST;
	138	} else
	139	return ret;
	140	req = data;
f01c4e68	141	ret = -ENOSYS;
27111a23 BS	142
	143	if (!(ntfy = kmalloc(sizeof(*ntfy), GFP_KERNEL)))
	144	return -ENOMEM;
	145	atomic_set(&ntfy->enabled, 0);
	146
f01c4e68	147	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, true))) {
27111a23 BS	148	ntfy->reply = sizeof(struct nvif_notify_rep_v0) + req->v0.reply;
	149	ntfy->route = req->v0.route;
	150	ntfy->token = req->v0.token;
	151	req->v0.route = NVDRM_NOTIFY_USIF;
	152	req->v0.token = (unsigned long)(void *)ntfy;
	153	ret = nvif_client_ioctl(client, argv, argc);
	154	req->v0.token = ntfy->token;
	155	req->v0.route = ntfy->route;
	156	ntfy->handle = args->v0.index;
	157	}
	158
	159	if (ret == 0)
	160	list_add(&ntfy->head, &cli->notifys);
	161	if (ret)
	162	kfree(ntfy);
	163	return ret;
	164	}
	165
	166	static int
	167	usif_notify_del(struct drm_file f, void data, u32 size, void *argv, u32 argc)
	168	{
	169	struct nouveau_cli *cli = nouveau_cli(f);
	170	struct nvif_client *client = &cli->base;
	171	union {
	172	struct nvif_ioctl_ntfy_del_v0 v0;
	173	} *args = data;
	174	struct usif_notify *ntfy;
f01c4e68	175	int ret = -ENOSYS;
27111a23	176
f01c4e68	177	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
27111a23 BS	178	if (!(ntfy = usif_notify_find(f, args->v0.index)))
	179	return -ENOENT;
	180	} else
	181	return ret;
	182
	183	ret = nvif_client_ioctl(client, argv, argc);
	184	if (ret == 0)
	185	usif_notify_dtor(ntfy);
	186	return ret;
	187	}
	188
	189	static int
	190	usif_notify_get(struct drm_file f, void data, u32 size, void *argv, u32 argc)
	191	{
	192	struct nouveau_cli *cli = nouveau_cli(f);
	193	struct nvif_client *client = &cli->base;
	194	union {
	195	struct nvif_ioctl_ntfy_del_v0 v0;
	196	} *args = data;
	197	struct usif_notify *ntfy;
f01c4e68	198	int ret = -ENOSYS;
27111a23	199
f01c4e68	200	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
27111a23 BS	201	if (!(ntfy = usif_notify_find(f, args->v0.index)))
	202	return -ENOENT;
	203	} else
	204	return ret;
	205
	206	if (atomic_xchg(&ntfy->enabled, 1))
	207	return 0;
	208
	209	ntfy->p = kmalloc(sizeof(*ntfy->p) + ntfy->reply, GFP_KERNEL);
	210	if (ret = -ENOMEM, !ntfy->p)
	211	goto done;
	212	ntfy->p->base.event = &ntfy->p->e.base;
	213	ntfy->p->base.file_priv = f;
	214	ntfy->p->base.pid = current->pid;
	215	ntfy->p->base.destroy =(void()(struct drm_pending_event ))kfree;
	216	ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF;
	217	ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply;
	218
	219	ret = nvif_client_ioctl(client, argv, argc);
	220	done:
	221	if (ret) {
	222	atomic_set(&ntfy->enabled, 0);
	223	kfree(ntfy->p);
	224	}
	225	return ret;
	226	}
	227
	228	static int
	229	usif_notify_put(struct drm_file f, void data, u32 size, void *argv, u32 argc)
	230	{
	231	struct nouveau_cli *cli = nouveau_cli(f);
	232	struct nvif_client *client = &cli->base;
	233	union {
	234	struct nvif_ioctl_ntfy_put_v0 v0;
	235	} *args = data;
	236	struct usif_notify *ntfy;
f01c4e68	237	int ret = -ENOSYS;
27111a23	238
f01c4e68	239	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
27111a23 BS	240	if (!(ntfy = usif_notify_find(f, args->v0.index)))
	241	return -ENOENT;
	242	} else
	243	return ret;
	244
	245	ret = nvif_client_ioctl(client, argv, argc);
	246	if (ret == 0 && atomic_xchg(&ntfy->enabled, 0))
	247	kfree(ntfy->p);
	248	return ret;
	249	}
	250
	251	struct usif_object {
	252	struct list_head head;
	253	struct list_head ntfy;
	254	u8 route;
	255	u64 token;
	256	};
	257
	258	static void
	259	usif_object_dtor(struct usif_object *object)
	260	{
	261	list_del(&object->head);
	262	kfree(object);
	263	}
	264
	265	static int
	266	usif_object_new(struct drm_file f, void data, u32 size, void *argv, u32 argc)
	267	{
	268	struct nouveau_cli *cli = nouveau_cli(f);
	269	struct nvif_client *client = &cli->base;
	270	union {
	271	struct nvif_ioctl_new_v0 v0;
	272	} *args = data;
	273	struct usif_object *object;
f01c4e68	274	int ret = -ENOSYS;
27111a23 BS	275
	276	if (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
	277	return -ENOMEM;
	278	list_add(&object->head, &cli->objects);
	279
f01c4e68	280	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
27111a23 BS	281	object->route = args->v0.route;
	282	object->token = args->v0.token;
	283	args->v0.route = NVDRM_OBJECT_USIF;
	284	args->v0.token = (unsigned long)(void *)object;
	285	ret = nvif_client_ioctl(client, argv, argc);
	286	args->v0.token = object->token;
	287	args->v0.route = object->route;
	288	}
	289
	290	if (ret)
	291	usif_object_dtor(object);
	292	return ret;
	293	}
	294
	295	int
	296	usif_ioctl(struct drm_file filp, void __user user, u32 argc)
	297	{
	298	struct nouveau_cli *cli = nouveau_cli(filp);
	299	struct nvif_client *client = &cli->base;
	300	void *data = kmalloc(argc, GFP_KERNEL);
	301	u32 size = argc;
	302	union {
	303	struct nvif_ioctl_v0 v0;
	304	} *argv = data;
	305	struct usif_object *object;
	306	u8 owner;
	307	int ret;
	308
	309	if (ret = -ENOMEM, !argv)
	310	goto done;
	311	if (ret = -EFAULT, copy_from_user(argv, user, size))
	312	goto done;
	313
f01c4e68	314	if (!(ret = nvif_unpack(-ENOSYS, &data, &size, argv->v0, 0, 0, true))) {
27111a23 BS	315	/* block access to objects not created via this interface */
27111a23 BS	316	owner = argv->v0.owner;
f5e55187 BS	317	if (argv->v0.object == 0ULL)
	318	argv->v0.owner = NVDRM_OBJECT_ANY; /* except client */
	319	else
	320	argv->v0.owner = NVDRM_OBJECT_USIF;
27111a23 BS	321	} else
	322	goto done;
	323
2621a416 BS	324	/* USIF slightly abuses some return-only ioctl members in order
	325	* to provide interoperability with the older ABI16 objects
	326	*/
27111a23	327	mutex_lock(&cli->mutex);
2621a416 BS	328	if (argv->v0.route) {
	329	if (ret = -EINVAL, argv->v0.route == 0xff)
	330	ret = nouveau_abi16_usif(filp, argv, argc);
	331	if (ret) {
	332	mutex_unlock(&cli->mutex);
	333	goto done;
	334	}
	335	}
	336
27111a23 BS	337	switch (argv->v0.type) {
27111a23 BS	338	case NVIF_IOCTL_V0_NEW:
27111a23 BS	339	ret = usif_object_new(filp, data, size, argv, argc);
	340	break;
	341	case NVIF_IOCTL_V0_NTFY_NEW:
	342	ret = usif_notify_new(filp, data, size, argv, argc);
	343	break;
	344	case NVIF_IOCTL_V0_NTFY_DEL:
	345	ret = usif_notify_del(filp, data, size, argv, argc);
	346	break;
	347	case NVIF_IOCTL_V0_NTFY_GET:
	348	ret = usif_notify_get(filp, data, size, argv, argc);
	349	break;
	350	case NVIF_IOCTL_V0_NTFY_PUT:
	351	ret = usif_notify_put(filp, data, size, argv, argc);
	352	break;
	353	default:
	354	ret = nvif_client_ioctl(client, argv, argc);
	355	break;
	356	}
	357	if (argv->v0.route == NVDRM_OBJECT_USIF) {
	358	object = (void *)(unsigned long)argv->v0.token;
	359	argv->v0.route = object->route;
	360	argv->v0.token = object->token;
	361	if (ret == 0 && argv->v0.type == NVIF_IOCTL_V0_DEL) {
	362	list_del(&object->head);
	363	kfree(object);
	364	}
	365	} else {
	366	argv->v0.route = NVIF_IOCTL_V0_ROUTE_HIDDEN;
	367	argv->v0.token = 0;
	368	}
	369	argv->v0.owner = owner;
	370	mutex_unlock(&cli->mutex);
	371
	372	if (copy_to_user(user, argv, argc))
	373	ret = -EFAULT;
	374	done:
	375	kfree(argv);
	376	return ret;
	377	}
	378
	379	void
	380	usif_client_fini(struct nouveau_cli *cli)
	381	{
	382	struct usif_object object, otemp;
	383	struct usif_notify notify, ntemp;
	384
	385	list_for_each_entry_safe(notify, ntemp, &cli->notifys, head) {
	386	usif_notify_dtor(notify);
	387	}
	388
	389	list_for_each_entry_safe(object, otemp, &cli->objects, head) {
	390	usif_object_dtor(object);
	391	}
	392	}
	393
	394	void
	395	usif_client_init(struct nouveau_cli *cli)
	396	{
	397	INIT_LIST_HEAD(&cli->objects);
	398	INIT_LIST_HEAD(&cli->notifys);
	399	}