[linux-block.git] / drivers / infiniband / core / cma_configfs.c

/*
 * Copyright (c) 2015, Mellanox Technologies inc.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * 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 AUTHORS OR COPYRIGHT HOLDERS
 * 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.
 */

#include <linux/configfs.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>

#include "core_priv.h"
#include "cma_priv.h"

struct cma_device;

struct cma_dev_group;

struct cma_dev_port_group {
	u32			port_num;
	struct cma_dev_group	*cma_dev_group;
	struct config_group	group;
};

struct cma_dev_group {
	char				name[IB_DEVICE_NAME_MAX];
	struct config_group		device_group;
	struct config_group		ports_group;
	struct cma_dev_port_group	*ports;
};

static struct cma_dev_port_group *to_dev_port_group(struct config_item *item)
{
	struct config_group *group;

	if (!item)
		return NULL;

	group = container_of(item, struct config_group, cg_item);
	return container_of(group, struct cma_dev_port_group, group);
}

static bool filter_by_name(struct ib_device *ib_dev, void *cookie)
{
	return !strcmp(dev_name(&ib_dev->dev), cookie);
}

static int cma_configfs_params_get(struct config_item *item,
				   struct cma_device **pcma_dev,
				   struct cma_dev_port_group **pgroup)
{
	struct cma_dev_port_group *group = to_dev_port_group(item);
	struct cma_device *cma_dev;

	if (!group)
		return -ENODEV;

	cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
					    group->cma_dev_group->name);
	if (!cma_dev)
		return -ENODEV;

	*pcma_dev = cma_dev;
	*pgroup = group;

	return 0;
}

static void cma_configfs_params_put(struct cma_device *cma_dev)
{
	cma_dev_put(cma_dev);
}

static ssize_t default_roce_mode_show(struct config_item *item,
				      char *buf)
{
	struct cma_device *cma_dev;
	struct cma_dev_port_group *group;
	int gid_type;
	ssize_t ret;

	ret = cma_configfs_params_get(item, &cma_dev, &group);
	if (ret)
		return ret;

	gid_type = cma_get_default_gid_type(cma_dev, group->port_num);
	cma_configfs_params_put(cma_dev);

	if (gid_type < 0)
		return gid_type;

	return sysfs_emit(buf, "%s\n", ib_cache_gid_type_str(gid_type));
}

static ssize_t default_roce_mode_store(struct config_item *item,
				       const char *buf, size_t count)
{
	struct cma_device *cma_dev;
	struct cma_dev_port_group *group;
	int gid_type;
	ssize_t ret;

	ret = cma_configfs_params_get(item, &cma_dev, &group);
	if (ret)
		return ret;

	gid_type = ib_cache_gid_parse_type_str(buf);
	if (gid_type < 0) {
		cma_configfs_params_put(cma_dev);
		return -EINVAL;
	}

	ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type);

	cma_configfs_params_put(cma_dev);

	return !ret ? strnlen(buf, count) : ret;
}

CONFIGFS_ATTR(, default_roce_mode);

static ssize_t default_roce_tos_show(struct config_item *item, char *buf)
{
	struct cma_device *cma_dev;
	struct cma_dev_port_group *group;
	ssize_t ret;
	u8 tos;

	ret = cma_configfs_params_get(item, &cma_dev, &group);
	if (ret)
		return ret;

	tos = cma_get_default_roce_tos(cma_dev, group->port_num);
	cma_configfs_params_put(cma_dev);

	return sysfs_emit(buf, "%u\n", tos);
}

static ssize_t default_roce_tos_store(struct config_item *item,
				      const char *buf, size_t count)
{
	struct cma_device *cma_dev;
	struct cma_dev_port_group *group;
	ssize_t ret;
	u8 tos;

	ret = kstrtou8(buf, 0, &tos);
	if (ret)
		return ret;

	ret = cma_configfs_params_get(item, &cma_dev, &group);
	if (ret)
		return ret;

	ret = cma_set_default_roce_tos(cma_dev, group->port_num, tos);
	cma_configfs_params_put(cma_dev);

	return ret ? ret : strnlen(buf, count);
}

CONFIGFS_ATTR(, default_roce_tos);

static struct configfs_attribute *cma_configfs_attributes[] = {
	&attr_default_roce_mode,
	&attr_default_roce_tos,
	NULL,
};

static const struct config_item_type cma_port_group_type = {
	.ct_attrs	= cma_configfs_attributes,
	.ct_owner	= THIS_MODULE
};

static int make_cma_ports(struct cma_dev_group *cma_dev_group,
			  struct cma_device *cma_dev)
{
	struct cma_dev_port_group *ports;
	struct ib_device *ibdev;
	u32 ports_num;
	u32 i;

	ibdev = cma_get_ib_dev(cma_dev);

	if (!ibdev)
		return -ENODEV;

	ports_num = ibdev->phys_port_cnt;
	ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports),
			GFP_KERNEL);

	if (!ports)
		return -ENOMEM;

	for (i = 0; i < ports_num; i++) {
		char port_str[11];

		ports[i].port_num = i + 1;
		snprintf(port_str, sizeof(port_str), "%u", i + 1);
		ports[i].cma_dev_group = cma_dev_group;
		config_group_init_type_name(&ports[i].group,
					    port_str,
					    &cma_port_group_type);
		configfs_add_default_group(&ports[i].group,
				&cma_dev_group->ports_group);

	}
	cma_dev_group->ports = ports;
	return 0;
}

static void release_cma_dev(struct config_item  *item)
{
	struct config_group *group = container_of(item, struct config_group,
						  cg_item);
	struct cma_dev_group *cma_dev_group = container_of(group,
							   struct cma_dev_group,
							   device_group);

	kfree(cma_dev_group);
};

static void release_cma_ports_group(struct config_item  *item)
{
	struct config_group *group = container_of(item, struct config_group,
						  cg_item);
	struct cma_dev_group *cma_dev_group = container_of(group,
							   struct cma_dev_group,
							   ports_group);

	kfree(cma_dev_group->ports);
	cma_dev_group->ports = NULL;
};

static struct configfs_item_operations cma_ports_item_ops = {
	.release = release_cma_ports_group
};

static const struct config_item_type cma_ports_group_type = {
	.ct_item_ops	= &cma_ports_item_ops,
	.ct_owner	= THIS_MODULE
};

static struct configfs_item_operations cma_device_item_ops = {
	.release = release_cma_dev
};

static const struct config_item_type cma_device_group_type = {
	.ct_item_ops	= &cma_device_item_ops,
	.ct_owner	= THIS_MODULE
};

static struct config_group *make_cma_dev(struct config_group *group,
					 const char *name)
{
	int err = -ENODEV;
	struct cma_device *cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
							       (void *)name);
	struct cma_dev_group *cma_dev_group = NULL;

	if (!cma_dev)
		goto fail;

	cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL);

	if (!cma_dev_group) {
		err = -ENOMEM;
		goto fail;
	}

	strscpy(cma_dev_group->name, name, sizeof(cma_dev_group->name));

	config_group_init_type_name(&cma_dev_group->ports_group, "ports",
				    &cma_ports_group_type);

	err = make_cma_ports(cma_dev_group, cma_dev);
	if (err)
		goto fail;

	config_group_init_type_name(&cma_dev_group->device_group, name,
				    &cma_device_group_type);
	configfs_add_default_group(&cma_dev_group->ports_group,
			&cma_dev_group->device_group);

	cma_dev_put(cma_dev);
	return &cma_dev_group->device_group;

fail:
	if (cma_dev)
		cma_dev_put(cma_dev);
	kfree(cma_dev_group);
	return ERR_PTR(err);
}

static void drop_cma_dev(struct config_group *cgroup, struct config_item *item)
{
	struct config_group *group =
		container_of(item, struct config_group, cg_item);
	struct cma_dev_group *cma_dev_group =
		container_of(group, struct cma_dev_group, device_group);

	configfs_remove_default_groups(&cma_dev_group->ports_group);
	configfs_remove_default_groups(&cma_dev_group->device_group);
	config_item_put(item);
}

static struct configfs_group_operations cma_subsys_group_ops = {
	.make_group	= make_cma_dev,
	.drop_item	= drop_cma_dev,
};

static const struct config_item_type cma_subsys_type = {
	.ct_group_ops	= &cma_subsys_group_ops,
	.ct_owner	= THIS_MODULE,
};

static struct configfs_subsystem cma_subsys = {
	.su_group	= {
		.cg_item	= {
			.ci_namebuf	= "rdma_cm",
			.ci_type	= &cma_subsys_type,
		},
	},
};

int __init cma_configfs_init(void)
{
	int ret;

	config_group_init(&cma_subsys.su_group);
	mutex_init(&cma_subsys.su_mutex);
	ret = configfs_register_subsystem(&cma_subsys);
	if (ret)
		mutex_destroy(&cma_subsys.su_mutex);
	return ret;
}

void __exit cma_configfs_exit(void)
{
	configfs_unregister_subsystem(&cma_subsys);
	mutex_destroy(&cma_subsys.su_mutex);
}
Commit	Line	Data
045959db MB	1	/*
	2	* Copyright (c) 2015, Mellanox Technologies inc. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
045959db MB	33	#include <linux/configfs.h>
045959db MB	34	#include <rdma/ib_verbs.h>
eeb8df87 PP	35	#include <rdma/rdma_cm.h>
eeb8df87 PP	36
045959db	37	#include "core_priv.h"
eeb8df87	38	#include "cma_priv.h"
045959db MB	39
	40	struct cma_device;
	41
	42	struct cma_dev_group;
	43
	44	struct cma_dev_port_group {
1fb7f897	45	u32 port_num;
045959db MB	46	struct cma_dev_group *cma_dev_group;
	47	struct config_group group;
	48	};
	49
	50	struct cma_dev_group {
	51	char name[IB_DEVICE_NAME_MAX];
	52	struct config_group device_group;
	53	struct config_group ports_group;
045959db MB	54	struct cma_dev_port_group *ports;
	55	};
	56
	57	static struct cma_dev_port_group to_dev_port_group(struct config_item item)
	58	{
	59	struct config_group *group;
	60
	61	if (!item)
	62	return NULL;
	63
	64	group = container_of(item, struct config_group, cg_item);
	65	return container_of(group, struct cma_dev_port_group, group);
	66	}
	67
	68	static bool filter_by_name(struct ib_device ib_dev, void cookie)
	69	{
896de009	70	return !strcmp(dev_name(&ib_dev->dev), cookie);
045959db MB	71	}
	72
	73	static int cma_configfs_params_get(struct config_item *item,
	74	struct cma_device **pcma_dev,
	75	struct cma_dev_port_group **pgroup)
	76	{
	77	struct cma_dev_port_group *group = to_dev_port_group(item);
	78	struct cma_device *cma_dev;
	79
	80	if (!group)
	81	return -ENODEV;
	82
	83	cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
	84	group->cma_dev_group->name);
	85	if (!cma_dev)
	86	return -ENODEV;
	87
	88	*pcma_dev = cma_dev;
	89	*pgroup = group;
	90
	91	return 0;
	92	}
	93
	94	static void cma_configfs_params_put(struct cma_device *cma_dev)
	95	{
5ff8c8fa	96	cma_dev_put(cma_dev);
045959db MB	97	}
	98
	99	static ssize_t default_roce_mode_show(struct config_item *item,
	100	char *buf)
	101	{
	102	struct cma_device *cma_dev;
	103	struct cma_dev_port_group *group;
	104	int gid_type;
	105	ssize_t ret;
	106
	107	ret = cma_configfs_params_get(item, &cma_dev, &group);
	108	if (ret)
	109	return ret;
	110
	111	gid_type = cma_get_default_gid_type(cma_dev, group->port_num);
	112	cma_configfs_params_put(cma_dev);
	113
	114	if (gid_type < 0)
	115	return gid_type;
	116
e28bf1f0	117	return sysfs_emit(buf, "%s\n", ib_cache_gid_type_str(gid_type));
045959db MB	118	}
	119
	120	static ssize_t default_roce_mode_store(struct config_item *item,
	121	const char *buf, size_t count)
	122	{
	123	struct cma_device *cma_dev;
	124	struct cma_dev_port_group *group;
1c15b4f2	125	int gid_type;
045959db MB	126	ssize_t ret;
045959db MB	127
045959db MB	128	ret = cma_configfs_params_get(item, &cma_dev, &group);
	129	if (ret)
	130	return ret;
	131
1c15b4f2	132	gid_type = ib_cache_gid_parse_type_str(buf);
7c7b3e5d NO	133	if (gid_type < 0) {
7c7b3e5d NO	134	cma_configfs_params_put(cma_dev);
1c15b4f2	135	return -EINVAL;
7c7b3e5d	136	}
1c15b4f2	137
045959db MB	138	ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type);
	139
	140	cma_configfs_params_put(cma_dev);
	141
	142	return !ret ? strnlen(buf, count) : ret;
	143	}
	144
	145	CONFIGFS_ATTR(, default_roce_mode);
	146
89052d78 MD	147	static ssize_t default_roce_tos_show(struct config_item item, char buf)
	148	{
	149	struct cma_device *cma_dev;
	150	struct cma_dev_port_group *group;
	151	ssize_t ret;
	152	u8 tos;
	153
	154	ret = cma_configfs_params_get(item, &cma_dev, &group);
	155	if (ret)
	156	return ret;
	157
	158	tos = cma_get_default_roce_tos(cma_dev, group->port_num);
	159	cma_configfs_params_put(cma_dev);
	160
e28bf1f0	161	return sysfs_emit(buf, "%u\n", tos);
89052d78 MD	162	}
	163
	164	static ssize_t default_roce_tos_store(struct config_item *item,
	165	const char *buf, size_t count)
	166	{
	167	struct cma_device *cma_dev;
	168	struct cma_dev_port_group *group;
	169	ssize_t ret;
	170	u8 tos;
	171
	172	ret = kstrtou8(buf, 0, &tos);
	173	if (ret)
	174	return ret;
	175
	176	ret = cma_configfs_params_get(item, &cma_dev, &group);
	177	if (ret)
	178	return ret;
	179
	180	ret = cma_set_default_roce_tos(cma_dev, group->port_num, tos);
	181	cma_configfs_params_put(cma_dev);
	182
	183	return ret ? ret : strnlen(buf, count);
	184	}
	185
	186	CONFIGFS_ATTR(, default_roce_tos);
	187
045959db MB	188	static struct configfs_attribute *cma_configfs_attributes[] = {
045959db MB	189	&attr_default_roce_mode,
89052d78	190	&attr_default_roce_tos,
045959db MB	191	NULL,
	192	};
	193
6ace4f6b	194	static const struct config_item_type cma_port_group_type = {
045959db MB	195	.ct_attrs = cma_configfs_attributes,
	196	.ct_owner = THIS_MODULE
	197	};
	198
	199	static int make_cma_ports(struct cma_dev_group *cma_dev_group,
	200	struct cma_device *cma_dev)
	201	{
045959db	202	struct cma_dev_port_group *ports;
1fb7f897 MB	203	struct ib_device *ibdev;
	204	u32 ports_num;
	205	u32 i;
045959db MB	206
	207	ibdev = cma_get_ib_dev(cma_dev);
	208
	209	if (!ibdev)
	210	return -ENODEV;
	211
	212	ports_num = ibdev->phys_port_cnt;
	213	ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports),
	214	GFP_KERNEL);
	215
0ccccb04 ZY	216	if (!ports)
0ccccb04 ZY	217	return -ENOMEM;
045959db MB	218
045959db MB	219	for (i = 0; i < ports_num; i++) {
18126c76	220	char port_str[11];
045959db MB	221
	222	ports[i].port_num = i + 1;
	223	snprintf(port_str, sizeof(port_str), "%u", i + 1);
	224	ports[i].cma_dev_group = cma_dev_group;
	225	config_group_init_type_name(&ports[i].group,
	226	port_str,
	227	&cma_port_group_type);
1ae1602d CH	228	configfs_add_default_group(&ports[i].group,
	229	&cma_dev_group->ports_group);
	230
045959db	231	}
045959db	232	cma_dev_group->ports = ports;
045959db	233	return 0;
045959db MB	234	}
	235
	236	static void release_cma_dev(struct config_item *item)
	237	{
	238	struct config_group *group = container_of(item, struct config_group,
	239	cg_item);
	240	struct cma_dev_group *cma_dev_group = container_of(group,
	241	struct cma_dev_group,
	242	device_group);
	243
	244	kfree(cma_dev_group);
	245	};
	246
	247	static void release_cma_ports_group(struct config_item *item)
	248	{
	249	struct config_group *group = container_of(item, struct config_group,
	250	cg_item);
	251	struct cma_dev_group *cma_dev_group = container_of(group,
	252	struct cma_dev_group,
	253	ports_group);
	254
	255	kfree(cma_dev_group->ports);
045959db	256	cma_dev_group->ports = NULL;
045959db MB	257	};
	258
	259	static struct configfs_item_operations cma_ports_item_ops = {
	260	.release = release_cma_ports_group
	261	};
	262
6ace4f6b	263	static const struct config_item_type cma_ports_group_type = {
045959db MB	264	.ct_item_ops = &cma_ports_item_ops,
	265	.ct_owner = THIS_MODULE
	266	};
	267
	268	static struct configfs_item_operations cma_device_item_ops = {
	269	.release = release_cma_dev
	270	};
	271
6ace4f6b	272	static const struct config_item_type cma_device_group_type = {
045959db MB	273	.ct_item_ops = &cma_device_item_ops,
	274	.ct_owner = THIS_MODULE
	275	};
	276
	277	static struct config_group make_cma_dev(struct config_group group,
	278	const char *name)
	279	{
	280	int err = -ENODEV;
	281	struct cma_device *cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
	282	(void *)name);
	283	struct cma_dev_group *cma_dev_group = NULL;
	284
	285	if (!cma_dev)
	286	goto fail;
	287
	288	cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL);
	289
	290	if (!cma_dev_group) {
	291	err = -ENOMEM;
	292	goto fail;
	293	}
	294
2c34bb6d	295	strscpy(cma_dev_group->name, name, sizeof(cma_dev_group->name));
045959db	296
045959db MB	297	config_group_init_type_name(&cma_dev_group->ports_group, "ports",
	298	&cma_ports_group_type);
	299
1ae1602d CH	300	err = make_cma_ports(cma_dev_group, cma_dev);
	301	if (err)
	302	goto fail;
045959db MB	303
	304	config_group_init_type_name(&cma_dev_group->device_group, name,
	305	&cma_device_group_type);
1ae1602d CH	306	configfs_add_default_group(&cma_dev_group->ports_group,
1ae1602d CH	307	&cma_dev_group->device_group);
045959db	308
5ff8c8fa	309	cma_dev_put(cma_dev);
045959db MB	310	return &cma_dev_group->device_group;
	311
	312	fail:
	313	if (cma_dev)
5ff8c8fa	314	cma_dev_put(cma_dev);
045959db MB	315	kfree(cma_dev_group);
	316	return ERR_PTR(err);
	317	}
	318
63a3345c MG	319	static void drop_cma_dev(struct config_group cgroup, struct config_item item)
	320	{
	321	struct config_group *group =
	322	container_of(item, struct config_group, cg_item);
	323	struct cma_dev_group *cma_dev_group =
	324	container_of(group, struct cma_dev_group, device_group);
	325
	326	configfs_remove_default_groups(&cma_dev_group->ports_group);
	327	configfs_remove_default_groups(&cma_dev_group->device_group);
	328	config_item_put(item);
	329	}
	330
045959db MB	331	static struct configfs_group_operations cma_subsys_group_ops = {
045959db MB	332	.make_group = make_cma_dev,
63a3345c	333	.drop_item = drop_cma_dev,
045959db MB	334	};
045959db MB	335
6ace4f6b	336	static const struct config_item_type cma_subsys_type = {
045959db MB	337	.ct_group_ops = &cma_subsys_group_ops,
	338	.ct_owner = THIS_MODULE,
	339	};
	340
	341	static struct configfs_subsystem cma_subsys = {
	342	.su_group = {
	343	.cg_item = {
	344	.ci_namebuf = "rdma_cm",
	345	.ci_type = &cma_subsys_type,
	346	},
	347	},
	348	};
	349
	350	int __init cma_configfs_init(void)
	351	{
56594ae1 PP	352	int ret;
56594ae1 PP	353
045959db MB	354	config_group_init(&cma_subsys.su_group);
045959db MB	355	mutex_init(&cma_subsys.su_mutex);
56594ae1 PP	356	ret = configfs_register_subsystem(&cma_subsys);
	357	if (ret)
	358	mutex_destroy(&cma_subsys.su_mutex);
	359	return ret;
045959db MB	360	}
	361
	362	void __exit cma_configfs_exit(void)
	363	{
	364	configfs_unregister_subsystem(&cma_subsys);
56594ae1	365	mutex_destroy(&cma_subsys.su_mutex);
045959db	366	}