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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 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/configfs.h> | |
35 | #include <rdma/ib_verbs.h> | |
eeb8df87 PP |
36 | #include <rdma/rdma_cm.h> |
37 | ||
045959db | 38 | #include "core_priv.h" |
eeb8df87 | 39 | #include "cma_priv.h" |
045959db MB |
40 | |
41 | struct cma_device; | |
42 | ||
43 | struct cma_dev_group; | |
44 | ||
45 | struct cma_dev_port_group { | |
46 | unsigned int port_num; | |
47 | struct cma_dev_group *cma_dev_group; | |
48 | struct config_group group; | |
49 | }; | |
50 | ||
51 | struct cma_dev_group { | |
52 | char name[IB_DEVICE_NAME_MAX]; | |
53 | struct config_group device_group; | |
54 | struct config_group ports_group; | |
045959db MB |
55 | struct cma_dev_port_group *ports; |
56 | }; | |
57 | ||
58 | static struct cma_dev_port_group *to_dev_port_group(struct config_item *item) | |
59 | { | |
60 | struct config_group *group; | |
61 | ||
62 | if (!item) | |
63 | return NULL; | |
64 | ||
65 | group = container_of(item, struct config_group, cg_item); | |
66 | return container_of(group, struct cma_dev_port_group, group); | |
67 | } | |
68 | ||
69 | static bool filter_by_name(struct ib_device *ib_dev, void *cookie) | |
70 | { | |
896de009 | 71 | return !strcmp(dev_name(&ib_dev->dev), cookie); |
045959db MB |
72 | } |
73 | ||
74 | static int cma_configfs_params_get(struct config_item *item, | |
75 | struct cma_device **pcma_dev, | |
76 | struct cma_dev_port_group **pgroup) | |
77 | { | |
78 | struct cma_dev_port_group *group = to_dev_port_group(item); | |
79 | struct cma_device *cma_dev; | |
80 | ||
81 | if (!group) | |
82 | return -ENODEV; | |
83 | ||
84 | cma_dev = cma_enum_devices_by_ibdev(filter_by_name, | |
85 | group->cma_dev_group->name); | |
86 | if (!cma_dev) | |
87 | return -ENODEV; | |
88 | ||
89 | *pcma_dev = cma_dev; | |
90 | *pgroup = group; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static void cma_configfs_params_put(struct cma_device *cma_dev) | |
96 | { | |
5ff8c8fa | 97 | cma_dev_put(cma_dev); |
045959db MB |
98 | } |
99 | ||
100 | static ssize_t default_roce_mode_show(struct config_item *item, | |
101 | char *buf) | |
102 | { | |
103 | struct cma_device *cma_dev; | |
104 | struct cma_dev_port_group *group; | |
105 | int gid_type; | |
106 | ssize_t ret; | |
107 | ||
108 | ret = cma_configfs_params_get(item, &cma_dev, &group); | |
109 | if (ret) | |
110 | return ret; | |
111 | ||
112 | gid_type = cma_get_default_gid_type(cma_dev, group->port_num); | |
113 | cma_configfs_params_put(cma_dev); | |
114 | ||
115 | if (gid_type < 0) | |
116 | return gid_type; | |
117 | ||
e28bf1f0 | 118 | return sysfs_emit(buf, "%s\n", ib_cache_gid_type_str(gid_type)); |
045959db MB |
119 | } |
120 | ||
121 | static ssize_t default_roce_mode_store(struct config_item *item, | |
122 | const char *buf, size_t count) | |
123 | { | |
124 | struct cma_device *cma_dev; | |
125 | struct cma_dev_port_group *group; | |
1c15b4f2 | 126 | int gid_type; |
045959db MB |
127 | ssize_t ret; |
128 | ||
045959db MB |
129 | ret = cma_configfs_params_get(item, &cma_dev, &group); |
130 | if (ret) | |
131 | return ret; | |
132 | ||
1c15b4f2 AH |
133 | gid_type = ib_cache_gid_parse_type_str(buf); |
134 | if (gid_type < 0) | |
135 | return -EINVAL; | |
136 | ||
045959db MB |
137 | ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type); |
138 | ||
139 | cma_configfs_params_put(cma_dev); | |
140 | ||
141 | return !ret ? strnlen(buf, count) : ret; | |
142 | } | |
143 | ||
144 | CONFIGFS_ATTR(, default_roce_mode); | |
145 | ||
89052d78 MD |
146 | static ssize_t default_roce_tos_show(struct config_item *item, char *buf) |
147 | { | |
148 | struct cma_device *cma_dev; | |
149 | struct cma_dev_port_group *group; | |
150 | ssize_t ret; | |
151 | u8 tos; | |
152 | ||
153 | ret = cma_configfs_params_get(item, &cma_dev, &group); | |
154 | if (ret) | |
155 | return ret; | |
156 | ||
157 | tos = cma_get_default_roce_tos(cma_dev, group->port_num); | |
158 | cma_configfs_params_put(cma_dev); | |
159 | ||
e28bf1f0 | 160 | return sysfs_emit(buf, "%u\n", tos); |
89052d78 MD |
161 | } |
162 | ||
163 | static ssize_t default_roce_tos_store(struct config_item *item, | |
164 | const char *buf, size_t count) | |
165 | { | |
166 | struct cma_device *cma_dev; | |
167 | struct cma_dev_port_group *group; | |
168 | ssize_t ret; | |
169 | u8 tos; | |
170 | ||
171 | ret = kstrtou8(buf, 0, &tos); | |
172 | if (ret) | |
173 | return ret; | |
174 | ||
175 | ret = cma_configfs_params_get(item, &cma_dev, &group); | |
176 | if (ret) | |
177 | return ret; | |
178 | ||
179 | ret = cma_set_default_roce_tos(cma_dev, group->port_num, tos); | |
180 | cma_configfs_params_put(cma_dev); | |
181 | ||
182 | return ret ? ret : strnlen(buf, count); | |
183 | } | |
184 | ||
185 | CONFIGFS_ATTR(, default_roce_tos); | |
186 | ||
045959db MB |
187 | static struct configfs_attribute *cma_configfs_attributes[] = { |
188 | &attr_default_roce_mode, | |
89052d78 | 189 | &attr_default_roce_tos, |
045959db MB |
190 | NULL, |
191 | }; | |
192 | ||
6ace4f6b | 193 | static const struct config_item_type cma_port_group_type = { |
045959db MB |
194 | .ct_attrs = cma_configfs_attributes, |
195 | .ct_owner = THIS_MODULE | |
196 | }; | |
197 | ||
198 | static int make_cma_ports(struct cma_dev_group *cma_dev_group, | |
199 | struct cma_device *cma_dev) | |
200 | { | |
201 | struct ib_device *ibdev; | |
202 | unsigned int i; | |
203 | unsigned int ports_num; | |
204 | struct cma_dev_port_group *ports; | |
205 | int err; | |
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 | ||
1ae1602d | 216 | if (!ports) { |
045959db MB |
217 | err = -ENOMEM; |
218 | goto free; | |
219 | } | |
220 | ||
221 | for (i = 0; i < ports_num; i++) { | |
222 | char port_str[10]; | |
223 | ||
224 | ports[i].port_num = i + 1; | |
225 | snprintf(port_str, sizeof(port_str), "%u", i + 1); | |
226 | ports[i].cma_dev_group = cma_dev_group; | |
227 | config_group_init_type_name(&ports[i].group, | |
228 | port_str, | |
229 | &cma_port_group_type); | |
1ae1602d CH |
230 | configfs_add_default_group(&ports[i].group, |
231 | &cma_dev_group->ports_group); | |
232 | ||
045959db | 233 | } |
045959db MB |
234 | cma_dev_group->ports = ports; |
235 | ||
236 | return 0; | |
237 | free: | |
238 | kfree(ports); | |
045959db | 239 | cma_dev_group->ports = NULL; |
045959db MB |
240 | return err; |
241 | } | |
242 | ||
243 | static void release_cma_dev(struct config_item *item) | |
244 | { | |
245 | struct config_group *group = container_of(item, struct config_group, | |
246 | cg_item); | |
247 | struct cma_dev_group *cma_dev_group = container_of(group, | |
248 | struct cma_dev_group, | |
249 | device_group); | |
250 | ||
251 | kfree(cma_dev_group); | |
252 | }; | |
253 | ||
254 | static void release_cma_ports_group(struct config_item *item) | |
255 | { | |
256 | struct config_group *group = container_of(item, struct config_group, | |
257 | cg_item); | |
258 | struct cma_dev_group *cma_dev_group = container_of(group, | |
259 | struct cma_dev_group, | |
260 | ports_group); | |
261 | ||
262 | kfree(cma_dev_group->ports); | |
045959db | 263 | cma_dev_group->ports = NULL; |
045959db MB |
264 | }; |
265 | ||
266 | static struct configfs_item_operations cma_ports_item_ops = { | |
267 | .release = release_cma_ports_group | |
268 | }; | |
269 | ||
6ace4f6b | 270 | static const struct config_item_type cma_ports_group_type = { |
045959db MB |
271 | .ct_item_ops = &cma_ports_item_ops, |
272 | .ct_owner = THIS_MODULE | |
273 | }; | |
274 | ||
275 | static struct configfs_item_operations cma_device_item_ops = { | |
276 | .release = release_cma_dev | |
277 | }; | |
278 | ||
6ace4f6b | 279 | static const struct config_item_type cma_device_group_type = { |
045959db MB |
280 | .ct_item_ops = &cma_device_item_ops, |
281 | .ct_owner = THIS_MODULE | |
282 | }; | |
283 | ||
284 | static struct config_group *make_cma_dev(struct config_group *group, | |
285 | const char *name) | |
286 | { | |
287 | int err = -ENODEV; | |
288 | struct cma_device *cma_dev = cma_enum_devices_by_ibdev(filter_by_name, | |
289 | (void *)name); | |
290 | struct cma_dev_group *cma_dev_group = NULL; | |
291 | ||
292 | if (!cma_dev) | |
293 | goto fail; | |
294 | ||
295 | cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL); | |
296 | ||
297 | if (!cma_dev_group) { | |
298 | err = -ENOMEM; | |
299 | goto fail; | |
300 | } | |
301 | ||
979a459c | 302 | strlcpy(cma_dev_group->name, name, sizeof(cma_dev_group->name)); |
045959db | 303 | |
045959db MB |
304 | config_group_init_type_name(&cma_dev_group->ports_group, "ports", |
305 | &cma_ports_group_type); | |
306 | ||
1ae1602d CH |
307 | err = make_cma_ports(cma_dev_group, cma_dev); |
308 | if (err) | |
309 | goto fail; | |
045959db MB |
310 | |
311 | config_group_init_type_name(&cma_dev_group->device_group, name, | |
312 | &cma_device_group_type); | |
1ae1602d CH |
313 | configfs_add_default_group(&cma_dev_group->ports_group, |
314 | &cma_dev_group->device_group); | |
045959db | 315 | |
5ff8c8fa | 316 | cma_dev_put(cma_dev); |
045959db MB |
317 | return &cma_dev_group->device_group; |
318 | ||
319 | fail: | |
320 | if (cma_dev) | |
5ff8c8fa | 321 | cma_dev_put(cma_dev); |
045959db MB |
322 | kfree(cma_dev_group); |
323 | return ERR_PTR(err); | |
324 | } | |
325 | ||
63a3345c MG |
326 | static void drop_cma_dev(struct config_group *cgroup, struct config_item *item) |
327 | { | |
328 | struct config_group *group = | |
329 | container_of(item, struct config_group, cg_item); | |
330 | struct cma_dev_group *cma_dev_group = | |
331 | container_of(group, struct cma_dev_group, device_group); | |
332 | ||
333 | configfs_remove_default_groups(&cma_dev_group->ports_group); | |
334 | configfs_remove_default_groups(&cma_dev_group->device_group); | |
335 | config_item_put(item); | |
336 | } | |
337 | ||
045959db MB |
338 | static struct configfs_group_operations cma_subsys_group_ops = { |
339 | .make_group = make_cma_dev, | |
63a3345c | 340 | .drop_item = drop_cma_dev, |
045959db MB |
341 | }; |
342 | ||
6ace4f6b | 343 | static const struct config_item_type cma_subsys_type = { |
045959db MB |
344 | .ct_group_ops = &cma_subsys_group_ops, |
345 | .ct_owner = THIS_MODULE, | |
346 | }; | |
347 | ||
348 | static struct configfs_subsystem cma_subsys = { | |
349 | .su_group = { | |
350 | .cg_item = { | |
351 | .ci_namebuf = "rdma_cm", | |
352 | .ci_type = &cma_subsys_type, | |
353 | }, | |
354 | }, | |
355 | }; | |
356 | ||
357 | int __init cma_configfs_init(void) | |
358 | { | |
56594ae1 PP |
359 | int ret; |
360 | ||
045959db MB |
361 | config_group_init(&cma_subsys.su_group); |
362 | mutex_init(&cma_subsys.su_mutex); | |
56594ae1 PP |
363 | ret = configfs_register_subsystem(&cma_subsys); |
364 | if (ret) | |
365 | mutex_destroy(&cma_subsys.su_mutex); | |
366 | return ret; | |
045959db MB |
367 | } |
368 | ||
369 | void __exit cma_configfs_exit(void) | |
370 | { | |
371 | configfs_unregister_subsystem(&cma_subsys); | |
56594ae1 | 372 | mutex_destroy(&cma_subsys.su_mutex); |
045959db | 373 | } |