[linux-2.6-block.git] / drivers / gpu / drm / nouveau / nvif / object.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 <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 = object->client;
	union {
		struct nvif_ioctl_v0 v0;
	} *args = data;

	if (size >= sizeof(*args) && args->v0.version == 0) {
		if (object != &client->object)
			args->v0.object = nvif_handle(object);
		else
			args->v0.object = 0;
		args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
	} else
		return -ENOSYS;

	return client->driver->ioctl(client->object.priv, client->super,
				     data, size, hack);
}

void
nvif_object_sclass_put(struct nvif_sclass **psclass)
{
	kfree(*psclass);
	*psclass = NULL;
}

int
nvif_object_sclass_get(struct nvif_object *object, struct nvif_sclass **psclass)
{
	struct {
		struct nvif_ioctl_v0 ioctl;
		struct nvif_ioctl_sclass_v0 sclass;
	} *args = NULL;
	int ret, cnt = 0, i;
	u32 size;

	while (1) {
		size = sizeof(*args) + cnt * sizeof(args->sclass.oclass[0]);
		if (!(args = kmalloc(size, GFP_KERNEL)))
			return -ENOMEM;
		args->ioctl.version = 0;
		args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
		args->sclass.version = 0;
		args->sclass.count = cnt;

		ret = nvif_object_ioctl(object, args, size, NULL);
		if (ret == 0 && args->sclass.count <= cnt)
			break;
		cnt = args->sclass.count;
		kfree(args);
		if (ret != 0)
			return ret;
	}

	*psclass = kcalloc(args->sclass.count, sizeof(**psclass), GFP_KERNEL);
	if (*psclass) {
		for (i = 0; i < args->sclass.count; i++) {
			(*psclass)[i].oclass = args->sclass.oclass[i].oclass;
			(*psclass)[i].minver = args->sclass.oclass[i].minver;
			(*psclass)[i].maxver = args->sclass.oclass[i].maxver;
		}
		ret = args->sclass.count;
	} else {
		ret = -ENOMEM;
	}

	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_handle(struct nvif_object *object)
{
	struct {
		struct nvif_ioctl_v0 ioctl;
		struct nvif_ioctl_unmap unmap;
	} args = {
		.ioctl.type = NVIF_IOCTL_V0_UNMAP,
	};

	nvif_object_ioctl(object, &args, sizeof(args), NULL);
}

int
nvif_object_map_handle(struct nvif_object *object, void *argv, u32 argc,
		       u64 *handle, u64 *length)
{
	struct {
		struct nvif_ioctl_v0 ioctl;
		struct nvif_ioctl_map_v0 map;
	} *args;
	u32 argn = sizeof(*args) + argc;
	int ret, maptype;

	if (!(args = kzalloc(argn, GFP_KERNEL)))
		return -ENOMEM;
	args->ioctl.type = NVIF_IOCTL_V0_MAP;
	memcpy(args->map.data, argv, argc);

	ret = nvif_object_ioctl(object, args, argn, NULL);
	*handle = args->map.handle;
	*length = args->map.length;
	maptype = args->map.type;
	kfree(args);
	return ret ? ret : (maptype == NVIF_IOCTL_MAP_V0_IO);
}

void
nvif_object_unmap(struct nvif_object *object)
{
	struct nvif_client *client = object->client;
	if (object->map.ptr) {
		if (object->map.size) {
			client->driver->unmap(client, object->map.ptr,
						      object->map.size);
			object->map.size = 0;
		}
		object->map.ptr = NULL;
		nvif_object_unmap_handle(object);
	}
}

int
nvif_object_map(struct nvif_object *object, void *argv, u32 argc)
{
	struct nvif_client *client = object->client;
	u64 handle, length;
	int ret = nvif_object_map_handle(object, argv, argc, &handle, &length);
	if (ret >= 0) {
		if (ret) {
			object->map.ptr = client->driver->map(client,
							      handle,
							      length);
			if (ret = -ENOMEM, object->map.ptr) {
				object->map.size = length;
				return 0;
			}
		} else {
			object->map.ptr = (void *)(unsigned long)handle;
			return 0;
		}
		nvif_object_unmap_handle(object);
	}
	return ret;
}

void
nvif_object_fini(struct nvif_object *object)
{
	struct {
		struct nvif_ioctl_v0 ioctl;
		struct nvif_ioctl_del del;
	} args = {
		.ioctl.type = NVIF_IOCTL_V0_DEL,
	};

	if (!object->client)
		return;

	nvif_object_unmap(object);
	nvif_object_ioctl(object, &args, sizeof(args), NULL);
	object->client = NULL;
}

int
nvif_object_init(struct nvif_object *parent, u32 handle, s32 oclass,
		 void *data, u32 size, struct nvif_object *object)
{
	struct {
		struct nvif_ioctl_v0 ioctl;
		struct nvif_ioctl_new_v0 new;
	} *args;
	int ret = 0;

	object->client = NULL;
	object->handle = handle;
	object->oclass = oclass;
	object->map.ptr = NULL;
	object->map.size = 0;

	if (parent) {
		if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) {
			nvif_object_fini(object);
			return -ENOMEM;
		}

		args->ioctl.version = 0;
		args->ioctl.type = NVIF_IOCTL_V0_NEW;
		args->new.version = 0;
		args->new.route = parent->client->route;
		args->new.token = nvif_handle(object);
		args->new.object = nvif_handle(object);
		args->new.handle = handle;
		args->new.oclass = oclass;

		memcpy(args->new.data, data, size);
		ret = nvif_object_ioctl(parent, args, sizeof(*args) + size,
					&object->priv);
		memcpy(data, args->new.data, size);
		kfree(args);
		if (ret == 0)
			object->client = parent->client;
	}

	if (ret)
		nvif_object_fini(object);
	return ret;
}
Commit	Line	Data
a04d0423 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
c39f472e BS	25	#include <nvif/object.h>
	26	#include <nvif/client.h>
	27	#include <nvif/driver.h>
	28	#include <nvif/ioctl.h>
a04d0423 BS	29
	30	int
	31	nvif_object_ioctl(struct nvif_object object, void data, u32 size, void **hack)
	32	{
a01ca78c	33	struct nvif_client *client = object->client;
a04d0423 BS	34	union {
	35	struct nvif_ioctl_v0 v0;
	36	} *args = data;
	37
	38	if (size >= sizeof(*args) && args->v0.version == 0) {
bf81df9b BS	39	if (object != &client->object)
	40	args->v0.object = nvif_handle(object);
	41	else
	42	args->v0.object = 0;
a04d0423	43	args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
a04d0423 BS	44	} else
	45	return -ENOSYS;
	46
a01ca78c BS	47	return client->driver->ioctl(client->object.priv, client->super,
a01ca78c BS	48	data, size, hack);
a04d0423 BS	49	}
a04d0423 BS	50
41a63406 BS	51	void
	52	nvif_object_sclass_put(struct nvif_sclass **psclass)
	53	{
	54	kfree(*psclass);
	55	*psclass = NULL;
	56	}
	57
a04d0423	58	int
41a63406	59	nvif_object_sclass_get(struct nvif_object object, struct nvif_sclass *psclass)
a04d0423 BS	60	{
	61	struct {
	62	struct nvif_ioctl_v0 ioctl;
	63	struct nvif_ioctl_sclass_v0 sclass;
41a63406 BS	64	} *args = NULL;
	65	int ret, cnt = 0, i;
	66	u32 size;
a04d0423	67
41a63406 BS	68	while (1) {
	69	size = sizeof(args) + cnt sizeof(args->sclass.oclass[0]);
	70	if (!(args = kmalloc(size, GFP_KERNEL)))
	71	return -ENOMEM;
	72	args->ioctl.version = 0;
	73	args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
	74	args->sclass.version = 0;
	75	args->sclass.count = cnt;
	76
	77	ret = nvif_object_ioctl(object, args, size, NULL);
	78	if (ret == 0 && args->sclass.count <= cnt)
	79	break;
	80	cnt = args->sclass.count;
	81	kfree(args);
	82	if (ret != 0)
	83	return ret;
	84	}
	85
6396bb22	86	psclass = kcalloc(args->sclass.count, sizeof(*psclass), GFP_KERNEL);
41a63406 BS	87	if (*psclass) {
	88	for (i = 0; i < args->sclass.count; i++) {
	89	(*psclass)[i].oclass = args->sclass.oclass[i].oclass;
	90	(*psclass)[i].minver = args->sclass.oclass[i].minver;
	91	(*psclass)[i].maxver = args->sclass.oclass[i].maxver;
	92	}
	93	ret = args->sclass.count;
	94	} else {
	95	ret = -ENOMEM;
	96	}
a04d0423	97
a04d0423 BS	98	kfree(args);
	99	return ret;
	100	}
	101
	102	u32
	103	nvif_object_rd(struct nvif_object *object, int size, u64 addr)
	104	{
	105	struct {
	106	struct nvif_ioctl_v0 ioctl;
	107	struct nvif_ioctl_rd_v0 rd;
	108	} args = {
	109	.ioctl.type = NVIF_IOCTL_V0_RD,
	110	.rd.size = size,
	111	.rd.addr = addr,
	112	};
	113	int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
	114	if (ret) {
	115	/XXX: warn? /
	116	return 0;
	117	}
	118	return args.rd.data;
	119	}
	120
	121	void
	122	nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data)
	123	{
	124	struct {
	125	struct nvif_ioctl_v0 ioctl;
	126	struct nvif_ioctl_wr_v0 wr;
	127	} args = {
	128	.ioctl.type = NVIF_IOCTL_V0_WR,
	129	.wr.size = size,
	130	.wr.addr = addr,
	131	.wr.data = data,
	132	};
	133	int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
	134	if (ret) {
	135	/XXX: warn? /
	136	}
	137	}
	138
	139	int
	140	nvif_object_mthd(struct nvif_object object, u32 mthd, void data, u32 size)
	141	{
	142	struct {
	143	struct nvif_ioctl_v0 ioctl;
	144	struct nvif_ioctl_mthd_v0 mthd;
	145	} *args;
	146	u8 stack[128];
	147	int ret;
	148
	149	if (sizeof(*args) + size > sizeof(stack)) {
	150	if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
	151	return -ENOMEM;
	152	} else {
	153	args = (void *)stack;
	154	}
	155	args->ioctl.version = 0;
	156	args->ioctl.type = NVIF_IOCTL_V0_MTHD;
	157	args->mthd.version = 0;
	158	args->mthd.method = mthd;
	159
	160	memcpy(args->mthd.data, data, size);
	161	ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
162	memcpy(data, args->mthd.data, size);
163	if (args != (void *)stack)
164	kfree(args);
165	return ret;
166	}
167
01326050 BS	168	void
	169	nvif_object_unmap_handle(struct nvif_object *object)
	170	{
	171	struct {
	172	struct nvif_ioctl_v0 ioctl;
	173	struct nvif_ioctl_unmap unmap;
	174	} args = {
	175	.ioctl.type = NVIF_IOCTL_V0_UNMAP,
	176	};
	177
	178	nvif_object_ioctl(object, &args, sizeof(args), NULL);
	179	}
	180
	181	int
	182	nvif_object_map_handle(struct nvif_object object, void argv, u32 argc,
	183	u64 handle, u64 length)
	184	{
	185	struct {
	186	struct nvif_ioctl_v0 ioctl;
	187	struct nvif_ioctl_map_v0 map;
	188	} *args;
	189	u32 argn = sizeof(*args) + argc;
	190	int ret, maptype;
	191
	192	if (!(args = kzalloc(argn, GFP_KERNEL)))
	193	return -ENOMEM;
	194	args->ioctl.type = NVIF_IOCTL_V0_MAP;
	195	memcpy(args->map.data, argv, argc);
	196
	197	ret = nvif_object_ioctl(object, args, argn, NULL);
	198	*handle = args->map.handle;
	199	*length = args->map.length;
	200	maptype = args->map.type;
	201	kfree(args);
	202	return ret ? ret : (maptype == NVIF_IOCTL_MAP_V0_IO);
	203	}
	204
a04d0423 BS	205	void
	206	nvif_object_unmap(struct nvif_object *object)
	207	{
01326050 BS	208	struct nvif_client *client = object->client;
	209	if (object->map.ptr) {
	210	if (object->map.size) {
a04d0423 BS	211	client->driver->unmap(client, object->map.ptr,
a04d0423 BS	212	object->map.size);
01326050	213	object->map.size = 0;
a04d0423	214	}
01326050 BS	215	object->map.ptr = NULL;
01326050 BS	216	nvif_object_unmap_handle(object);
a04d0423 BS	217	}
	218	}
	219
	220	int
01326050	221	nvif_object_map(struct nvif_object object, void argv, u32 argc)
a04d0423	222	{
a01ca78c	223	struct nvif_client *client = object->client;
01326050 BS	224	u64 handle, length;
	225	int ret = nvif_object_map_handle(object, argv, argc, &handle, &length);
	226	if (ret >= 0) {
	227	if (ret) {
	228	object->map.ptr = client->driver->map(client,
	229	handle,
	230	length);
	231	if (ret = -ENOMEM, object->map.ptr) {
	232	object->map.size = length;
	233	return 0;
	234	}
	235	} else {
	236	object->map.ptr = (void *)(unsigned long)handle;
a04d0423	237	return 0;
01326050 BS	238	}
01326050 BS	239	nvif_object_unmap_handle(object);
a04d0423 BS	240	}
	241	return ret;
	242	}
	243
a04d0423 BS	244	void
	245	nvif_object_fini(struct nvif_object *object)
	246	{
a01ca78c BS	247	struct {
	248	struct nvif_ioctl_v0 ioctl;
	249	struct nvif_ioctl_del del;
	250	} args = {
	251	.ioctl.type = NVIF_IOCTL_V0_DEL,
	252	};
a04d0423	253
a01ca78c BS	254	if (!object->client)
	255	return;
	256
	257	nvif_object_unmap(object);
	258	nvif_object_ioctl(object, &args, sizeof(args), NULL);
	259	object->client = NULL;
a04d0423 BS	260	}
	261
	262	int
315a8b2e	263	nvif_object_init(struct nvif_object *parent, u32 handle, s32 oclass,
a01ca78c	264	void data, u32 size, struct nvif_object object)
a04d0423	265	{
a01ca78c BS	266	struct {
	267	struct nvif_ioctl_v0 ioctl;
	268	struct nvif_ioctl_new_v0 new;
	269	} *args;
a04d0423 BS	270	int ret = 0;
a04d0423 BS	271
a01ca78c	272	object->client = NULL;
a04d0423 BS	273	object->handle = handle;
a04d0423 BS	274	object->oclass = oclass;
a04d0423 BS	275	object->map.ptr = NULL;
	276	object->map.size = 0;
	277
bf81df9b	278	if (parent) {
a01ca78c	279	if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) {
a04d0423 BS	280	nvif_object_fini(object);
	281	return -ENOMEM;
	282	}
a04d0423	283
a01ca78c BS	284	args->ioctl.version = 0;
	285	args->ioctl.type = NVIF_IOCTL_V0_NEW;
	286	args->new.version = 0;
	287	args->new.route = parent->client->route;
bf81df9b BS	288	args->new.token = nvif_handle(object);
bf81df9b BS	289	args->new.object = nvif_handle(object);
a01ca78c BS	290	args->new.handle = handle;
	291	args->new.oclass = oclass;
	292
	293	memcpy(args->new.data, data, size);
	294	ret = nvif_object_ioctl(parent, args, sizeof(*args) + size,
	295	&object->priv);
	296	memcpy(data, args->new.data, size);
	297	kfree(args);
	298	if (ret == 0)
	299	object->client = parent->client;
a04d0423 BS	300	}
	301
	302	if (ret)
	303	nvif_object_fini(object);
	304	return ret;
	305	}