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45def22c DW |
1 | /* |
2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | */ | |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
62232e45 | 14 | #include <linux/vmalloc.h> |
45def22c | 15 | #include <linux/uaccess.h> |
3d88002e | 16 | #include <linux/module.h> |
8c2f7e86 | 17 | #include <linux/blkdev.h> |
45def22c | 18 | #include <linux/fcntl.h> |
e6dfb2de | 19 | #include <linux/async.h> |
8c2f7e86 | 20 | #include <linux/genhd.h> |
62232e45 | 21 | #include <linux/ndctl.h> |
4d88a97a | 22 | #include <linux/sched.h> |
45def22c DW |
23 | #include <linux/slab.h> |
24 | #include <linux/fs.h> | |
25 | #include <linux/io.h> | |
62232e45 | 26 | #include <linux/mm.h> |
4d88a97a | 27 | #include <linux/nd.h> |
45def22c | 28 | #include "nd-core.h" |
4d88a97a | 29 | #include "nd.h" |
45def22c | 30 | |
62232e45 | 31 | int nvdimm_major; |
45def22c DW |
32 | static int nvdimm_bus_major; |
33 | static struct class *nd_class; | |
18515942 | 34 | static DEFINE_IDA(nd_ida); |
45def22c | 35 | |
4d88a97a DW |
36 | static int to_nd_device_type(struct device *dev) |
37 | { | |
38 | if (is_nvdimm(dev)) | |
39 | return ND_DEVICE_DIMM; | |
3d88002e DW |
40 | else if (is_nd_pmem(dev)) |
41 | return ND_DEVICE_REGION_PMEM; | |
42 | else if (is_nd_blk(dev)) | |
43 | return ND_DEVICE_REGION_BLK; | |
cd03412a DW |
44 | else if (is_nd_dax(dev)) |
45 | return ND_DEVICE_DAX_PMEM; | |
3d88002e DW |
46 | else if (is_nd_pmem(dev->parent) || is_nd_blk(dev->parent)) |
47 | return nd_region_to_nstype(to_nd_region(dev->parent)); | |
4d88a97a DW |
48 | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static int nvdimm_bus_uevent(struct device *dev, struct kobj_uevent_env *env) | |
53 | { | |
41d7a6d6 TK |
54 | /* |
55 | * Ensure that region devices always have their numa node set as | |
56 | * early as possible. | |
57 | */ | |
58 | if (is_nd_pmem(dev) || is_nd_blk(dev)) | |
59 | set_dev_node(dev, to_nd_region(dev)->numa_node); | |
4d88a97a DW |
60 | return add_uevent_var(env, "MODALIAS=" ND_DEVICE_MODALIAS_FMT, |
61 | to_nd_device_type(dev)); | |
62 | } | |
63 | ||
3d88002e DW |
64 | static struct module *to_bus_provider(struct device *dev) |
65 | { | |
66 | /* pin bus providers while regions are enabled */ | |
67 | if (is_nd_pmem(dev) || is_nd_blk(dev)) { | |
68 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
69 | ||
bc9775d8 | 70 | return nvdimm_bus->nd_desc->module; |
3d88002e DW |
71 | } |
72 | return NULL; | |
73 | } | |
74 | ||
eaf96153 DW |
75 | static void nvdimm_bus_probe_start(struct nvdimm_bus *nvdimm_bus) |
76 | { | |
77 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
78 | nvdimm_bus->probe_active++; | |
79 | nvdimm_bus_unlock(&nvdimm_bus->dev); | |
80 | } | |
81 | ||
82 | static void nvdimm_bus_probe_end(struct nvdimm_bus *nvdimm_bus) | |
83 | { | |
84 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
85 | if (--nvdimm_bus->probe_active == 0) | |
86 | wake_up(&nvdimm_bus->probe_wait); | |
87 | nvdimm_bus_unlock(&nvdimm_bus->dev); | |
88 | } | |
89 | ||
4d88a97a DW |
90 | static int nvdimm_bus_probe(struct device *dev) |
91 | { | |
92 | struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver); | |
3d88002e | 93 | struct module *provider = to_bus_provider(dev); |
4d88a97a DW |
94 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); |
95 | int rc; | |
96 | ||
3d88002e DW |
97 | if (!try_module_get(provider)) |
98 | return -ENXIO; | |
99 | ||
eaf96153 | 100 | nvdimm_bus_probe_start(nvdimm_bus); |
4d88a97a | 101 | rc = nd_drv->probe(dev); |
eaf96153 DW |
102 | if (rc == 0) |
103 | nd_region_probe_success(nvdimm_bus, dev); | |
bf9bccc1 DW |
104 | else |
105 | nd_region_disable(nvdimm_bus, dev); | |
eaf96153 DW |
106 | nvdimm_bus_probe_end(nvdimm_bus); |
107 | ||
4d88a97a DW |
108 | dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name, |
109 | dev_name(dev), rc); | |
8c2f7e86 | 110 | |
3d88002e DW |
111 | if (rc != 0) |
112 | module_put(provider); | |
4d88a97a DW |
113 | return rc; |
114 | } | |
115 | ||
116 | static int nvdimm_bus_remove(struct device *dev) | |
117 | { | |
118 | struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver); | |
3d88002e | 119 | struct module *provider = to_bus_provider(dev); |
4d88a97a | 120 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); |
6cf9c5ba | 121 | int rc = 0; |
4d88a97a | 122 | |
6cf9c5ba DW |
123 | if (nd_drv->remove) |
124 | rc = nd_drv->remove(dev); | |
eaf96153 DW |
125 | nd_region_disable(nvdimm_bus, dev); |
126 | ||
4d88a97a DW |
127 | dev_dbg(&nvdimm_bus->dev, "%s.remove(%s) = %d\n", dev->driver->name, |
128 | dev_name(dev), rc); | |
3d88002e | 129 | module_put(provider); |
4d88a97a DW |
130 | return rc; |
131 | } | |
132 | ||
476f848a DW |
133 | static void nvdimm_bus_shutdown(struct device *dev) |
134 | { | |
135 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
136 | struct nd_device_driver *nd_drv = NULL; | |
137 | ||
138 | if (dev->driver) | |
139 | nd_drv = to_nd_device_driver(dev->driver); | |
140 | ||
141 | if (nd_drv && nd_drv->shutdown) { | |
142 | nd_drv->shutdown(dev); | |
143 | dev_dbg(&nvdimm_bus->dev, "%s.shutdown(%s)\n", | |
144 | dev->driver->name, dev_name(dev)); | |
145 | } | |
146 | } | |
147 | ||
71999466 DW |
148 | void nd_device_notify(struct device *dev, enum nvdimm_event event) |
149 | { | |
150 | device_lock(dev); | |
151 | if (dev->driver) { | |
152 | struct nd_device_driver *nd_drv; | |
153 | ||
154 | nd_drv = to_nd_device_driver(dev->driver); | |
155 | if (nd_drv->notify) | |
156 | nd_drv->notify(dev, event); | |
157 | } | |
158 | device_unlock(dev); | |
159 | } | |
160 | EXPORT_SYMBOL(nd_device_notify); | |
161 | ||
162 | void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event) | |
163 | { | |
164 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); | |
165 | ||
166 | if (!nvdimm_bus) | |
167 | return; | |
168 | ||
169 | /* caller is responsible for holding a reference on the device */ | |
170 | nd_device_notify(&nd_region->dev, event); | |
171 | } | |
172 | EXPORT_SYMBOL_GPL(nvdimm_region_notify); | |
173 | ||
59e64739 DW |
174 | long nvdimm_clear_poison(struct device *dev, phys_addr_t phys, |
175 | unsigned int len) | |
176 | { | |
177 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
178 | struct nvdimm_bus_descriptor *nd_desc; | |
179 | struct nd_cmd_clear_error clear_err; | |
180 | struct nd_cmd_ars_cap ars_cap; | |
181 | u32 clear_err_unit, mask; | |
182 | int cmd_rc, rc; | |
183 | ||
184 | if (!nvdimm_bus) | |
185 | return -ENXIO; | |
186 | ||
187 | nd_desc = nvdimm_bus->nd_desc; | |
188 | if (!nd_desc->ndctl) | |
189 | return -ENXIO; | |
190 | ||
191 | memset(&ars_cap, 0, sizeof(ars_cap)); | |
192 | ars_cap.address = phys; | |
193 | ars_cap.length = len; | |
194 | rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_CAP, &ars_cap, | |
195 | sizeof(ars_cap), &cmd_rc); | |
196 | if (rc < 0) | |
197 | return rc; | |
198 | if (cmd_rc < 0) | |
199 | return cmd_rc; | |
200 | clear_err_unit = ars_cap.clear_err_unit; | |
201 | if (!clear_err_unit || !is_power_of_2(clear_err_unit)) | |
202 | return -ENXIO; | |
203 | ||
204 | mask = clear_err_unit - 1; | |
205 | if ((phys | len) & mask) | |
206 | return -ENXIO; | |
207 | memset(&clear_err, 0, sizeof(clear_err)); | |
208 | clear_err.address = phys; | |
209 | clear_err.length = len; | |
210 | rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_CLEAR_ERROR, &clear_err, | |
211 | sizeof(clear_err), &cmd_rc); | |
212 | if (rc < 0) | |
213 | return rc; | |
214 | if (cmd_rc < 0) | |
215 | return cmd_rc; | |
216 | return clear_err.cleared; | |
217 | } | |
218 | EXPORT_SYMBOL_GPL(nvdimm_clear_poison); | |
219 | ||
18515942 DW |
220 | static int nvdimm_bus_match(struct device *dev, struct device_driver *drv); |
221 | ||
4d88a97a | 222 | static struct bus_type nvdimm_bus_type = { |
e6dfb2de | 223 | .name = "nd", |
4d88a97a DW |
224 | .uevent = nvdimm_bus_uevent, |
225 | .match = nvdimm_bus_match, | |
226 | .probe = nvdimm_bus_probe, | |
227 | .remove = nvdimm_bus_remove, | |
476f848a | 228 | .shutdown = nvdimm_bus_shutdown, |
4d88a97a DW |
229 | }; |
230 | ||
18515942 DW |
231 | static void nvdimm_bus_release(struct device *dev) |
232 | { | |
233 | struct nvdimm_bus *nvdimm_bus; | |
234 | ||
235 | nvdimm_bus = container_of(dev, struct nvdimm_bus, dev); | |
236 | ida_simple_remove(&nd_ida, nvdimm_bus->id); | |
237 | kfree(nvdimm_bus); | |
238 | } | |
239 | ||
240 | static bool is_nvdimm_bus(struct device *dev) | |
241 | { | |
242 | return dev->release == nvdimm_bus_release; | |
243 | } | |
244 | ||
245 | struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev) | |
246 | { | |
247 | struct device *dev; | |
248 | ||
249 | for (dev = nd_dev; dev; dev = dev->parent) | |
250 | if (is_nvdimm_bus(dev)) | |
251 | break; | |
252 | dev_WARN_ONCE(nd_dev, !dev, "invalid dev, not on nd bus\n"); | |
253 | if (dev) | |
254 | return to_nvdimm_bus(dev); | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | struct nvdimm_bus *to_nvdimm_bus(struct device *dev) | |
259 | { | |
260 | struct nvdimm_bus *nvdimm_bus; | |
261 | ||
262 | nvdimm_bus = container_of(dev, struct nvdimm_bus, dev); | |
263 | WARN_ON(!is_nvdimm_bus(dev)); | |
264 | return nvdimm_bus; | |
265 | } | |
266 | EXPORT_SYMBOL_GPL(to_nvdimm_bus); | |
267 | ||
268 | struct nvdimm_bus *nvdimm_bus_register(struct device *parent, | |
269 | struct nvdimm_bus_descriptor *nd_desc) | |
270 | { | |
271 | struct nvdimm_bus *nvdimm_bus; | |
272 | int rc; | |
273 | ||
274 | nvdimm_bus = kzalloc(sizeof(*nvdimm_bus), GFP_KERNEL); | |
275 | if (!nvdimm_bus) | |
276 | return NULL; | |
277 | INIT_LIST_HEAD(&nvdimm_bus->list); | |
278 | INIT_LIST_HEAD(&nvdimm_bus->mapping_list); | |
279 | INIT_LIST_HEAD(&nvdimm_bus->poison_list); | |
280 | init_waitqueue_head(&nvdimm_bus->probe_wait); | |
281 | nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL); | |
282 | mutex_init(&nvdimm_bus->reconfig_mutex); | |
283 | if (nvdimm_bus->id < 0) { | |
284 | kfree(nvdimm_bus); | |
285 | return NULL; | |
286 | } | |
287 | nvdimm_bus->nd_desc = nd_desc; | |
288 | nvdimm_bus->dev.parent = parent; | |
289 | nvdimm_bus->dev.release = nvdimm_bus_release; | |
290 | nvdimm_bus->dev.groups = nd_desc->attr_groups; | |
291 | nvdimm_bus->dev.bus = &nvdimm_bus_type; | |
292 | dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id); | |
293 | rc = device_register(&nvdimm_bus->dev); | |
294 | if (rc) { | |
295 | dev_dbg(&nvdimm_bus->dev, "registration failed: %d\n", rc); | |
296 | goto err; | |
297 | } | |
298 | ||
299 | return nvdimm_bus; | |
300 | err: | |
301 | put_device(&nvdimm_bus->dev); | |
302 | return NULL; | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(nvdimm_bus_register); | |
305 | ||
306 | void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus) | |
307 | { | |
308 | if (!nvdimm_bus) | |
309 | return; | |
310 | device_unregister(&nvdimm_bus->dev); | |
311 | } | |
312 | EXPORT_SYMBOL_GPL(nvdimm_bus_unregister); | |
313 | ||
314 | static int child_unregister(struct device *dev, void *data) | |
315 | { | |
316 | /* | |
317 | * the singular ndctl class device per bus needs to be | |
318 | * "device_destroy"ed, so skip it here | |
319 | * | |
320 | * i.e. remove classless children | |
321 | */ | |
322 | if (dev->class) | |
323 | /* pass */; | |
324 | else | |
325 | nd_device_unregister(dev, ND_SYNC); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | static void free_poison_list(struct list_head *poison_list) | |
330 | { | |
331 | struct nd_poison *pl, *next; | |
332 | ||
333 | list_for_each_entry_safe(pl, next, poison_list, list) { | |
334 | list_del(&pl->list); | |
335 | kfree(pl); | |
336 | } | |
337 | list_del_init(poison_list); | |
338 | } | |
339 | ||
340 | static int nd_bus_remove(struct device *dev) | |
341 | { | |
342 | struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); | |
343 | ||
344 | mutex_lock(&nvdimm_bus_list_mutex); | |
345 | list_del_init(&nvdimm_bus->list); | |
346 | mutex_unlock(&nvdimm_bus_list_mutex); | |
347 | ||
348 | nd_synchronize(); | |
349 | device_for_each_child(&nvdimm_bus->dev, NULL, child_unregister); | |
350 | ||
351 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
352 | free_poison_list(&nvdimm_bus->poison_list); | |
353 | nvdimm_bus_unlock(&nvdimm_bus->dev); | |
354 | ||
355 | nvdimm_bus_destroy_ndctl(nvdimm_bus); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | static int nd_bus_probe(struct device *dev) | |
361 | { | |
362 | struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); | |
363 | int rc; | |
364 | ||
365 | rc = nvdimm_bus_create_ndctl(nvdimm_bus); | |
366 | if (rc) | |
367 | return rc; | |
368 | ||
369 | mutex_lock(&nvdimm_bus_list_mutex); | |
370 | list_add_tail(&nvdimm_bus->list, &nvdimm_bus_list); | |
371 | mutex_unlock(&nvdimm_bus_list_mutex); | |
372 | ||
373 | /* enable bus provider attributes to look up their local context */ | |
374 | dev_set_drvdata(dev, nvdimm_bus->nd_desc); | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static struct nd_device_driver nd_bus_driver = { | |
380 | .probe = nd_bus_probe, | |
381 | .remove = nd_bus_remove, | |
382 | .drv = { | |
383 | .name = "nd_bus", | |
384 | .suppress_bind_attrs = true, | |
385 | .bus = &nvdimm_bus_type, | |
386 | .owner = THIS_MODULE, | |
387 | .mod_name = KBUILD_MODNAME, | |
388 | }, | |
4d88a97a DW |
389 | }; |
390 | ||
18515942 DW |
391 | static int nvdimm_bus_match(struct device *dev, struct device_driver *drv) |
392 | { | |
393 | struct nd_device_driver *nd_drv = to_nd_device_driver(drv); | |
394 | ||
395 | if (is_nvdimm_bus(dev) && nd_drv == &nd_bus_driver) | |
396 | return true; | |
397 | ||
398 | return !!test_bit(to_nd_device_type(dev), &nd_drv->type); | |
399 | } | |
400 | ||
4d88a97a DW |
401 | static ASYNC_DOMAIN_EXCLUSIVE(nd_async_domain); |
402 | ||
403 | void nd_synchronize(void) | |
404 | { | |
405 | async_synchronize_full_domain(&nd_async_domain); | |
406 | } | |
407 | EXPORT_SYMBOL_GPL(nd_synchronize); | |
408 | ||
409 | static void nd_async_device_register(void *d, async_cookie_t cookie) | |
410 | { | |
411 | struct device *dev = d; | |
412 | ||
413 | if (device_add(dev) != 0) { | |
414 | dev_err(dev, "%s: failed\n", __func__); | |
415 | put_device(dev); | |
416 | } | |
417 | put_device(dev); | |
418 | } | |
419 | ||
420 | static void nd_async_device_unregister(void *d, async_cookie_t cookie) | |
421 | { | |
422 | struct device *dev = d; | |
423 | ||
0ba1c634 DW |
424 | /* flush bus operations before delete */ |
425 | nvdimm_bus_lock(dev); | |
426 | nvdimm_bus_unlock(dev); | |
427 | ||
4d88a97a DW |
428 | device_unregister(dev); |
429 | put_device(dev); | |
430 | } | |
431 | ||
8c2f7e86 | 432 | void __nd_device_register(struct device *dev) |
4d88a97a | 433 | { |
cd03412a DW |
434 | if (!dev) |
435 | return; | |
4d88a97a | 436 | dev->bus = &nvdimm_bus_type; |
4d88a97a DW |
437 | get_device(dev); |
438 | async_schedule_domain(nd_async_device_register, dev, | |
439 | &nd_async_domain); | |
440 | } | |
8c2f7e86 DW |
441 | |
442 | void nd_device_register(struct device *dev) | |
443 | { | |
444 | device_initialize(dev); | |
445 | __nd_device_register(dev); | |
446 | } | |
4d88a97a DW |
447 | EXPORT_SYMBOL(nd_device_register); |
448 | ||
449 | void nd_device_unregister(struct device *dev, enum nd_async_mode mode) | |
450 | { | |
451 | switch (mode) { | |
452 | case ND_ASYNC: | |
453 | get_device(dev); | |
454 | async_schedule_domain(nd_async_device_unregister, dev, | |
455 | &nd_async_domain); | |
456 | break; | |
457 | case ND_SYNC: | |
458 | nd_synchronize(); | |
459 | device_unregister(dev); | |
460 | break; | |
461 | } | |
462 | } | |
463 | EXPORT_SYMBOL(nd_device_unregister); | |
464 | ||
465 | /** | |
466 | * __nd_driver_register() - register a region or a namespace driver | |
467 | * @nd_drv: driver to register | |
468 | * @owner: automatically set by nd_driver_register() macro | |
469 | * @mod_name: automatically set by nd_driver_register() macro | |
470 | */ | |
471 | int __nd_driver_register(struct nd_device_driver *nd_drv, struct module *owner, | |
472 | const char *mod_name) | |
473 | { | |
474 | struct device_driver *drv = &nd_drv->drv; | |
475 | ||
476 | if (!nd_drv->type) { | |
477 | pr_debug("driver type bitmask not set (%pf)\n", | |
478 | __builtin_return_address(0)); | |
479 | return -EINVAL; | |
480 | } | |
481 | ||
6cf9c5ba DW |
482 | if (!nd_drv->probe) { |
483 | pr_debug("%s ->probe() must be specified\n", mod_name); | |
4d88a97a DW |
484 | return -EINVAL; |
485 | } | |
486 | ||
487 | drv->bus = &nvdimm_bus_type; | |
488 | drv->owner = owner; | |
489 | drv->mod_name = mod_name; | |
490 | ||
491 | return driver_register(drv); | |
492 | } | |
493 | EXPORT_SYMBOL(__nd_driver_register); | |
494 | ||
58138820 DW |
495 | int nvdimm_revalidate_disk(struct gendisk *disk) |
496 | { | |
52c44d93 | 497 | struct device *dev = disk_to_dev(disk)->parent; |
58138820 DW |
498 | struct nd_region *nd_region = to_nd_region(dev->parent); |
499 | const char *pol = nd_region->ro ? "only" : "write"; | |
500 | ||
501 | if (nd_region->ro == get_disk_ro(disk)) | |
502 | return 0; | |
503 | ||
504 | dev_info(dev, "%s read-%s, marking %s read-%s\n", | |
505 | dev_name(&nd_region->dev), pol, disk->disk_name, pol); | |
506 | set_disk_ro(disk, nd_region->ro); | |
507 | ||
508 | return 0; | |
509 | ||
510 | } | |
511 | EXPORT_SYMBOL(nvdimm_revalidate_disk); | |
512 | ||
4d88a97a DW |
513 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
514 | char *buf) | |
515 | { | |
516 | return sprintf(buf, ND_DEVICE_MODALIAS_FMT "\n", | |
517 | to_nd_device_type(dev)); | |
518 | } | |
519 | static DEVICE_ATTR_RO(modalias); | |
520 | ||
521 | static ssize_t devtype_show(struct device *dev, struct device_attribute *attr, | |
522 | char *buf) | |
523 | { | |
524 | return sprintf(buf, "%s\n", dev->type->name); | |
525 | } | |
526 | static DEVICE_ATTR_RO(devtype); | |
527 | ||
528 | static struct attribute *nd_device_attributes[] = { | |
529 | &dev_attr_modalias.attr, | |
530 | &dev_attr_devtype.attr, | |
531 | NULL, | |
532 | }; | |
533 | ||
534 | /** | |
535 | * nd_device_attribute_group - generic attributes for all devices on an nd bus | |
536 | */ | |
537 | struct attribute_group nd_device_attribute_group = { | |
538 | .attrs = nd_device_attributes, | |
e6dfb2de | 539 | }; |
4d88a97a | 540 | EXPORT_SYMBOL_GPL(nd_device_attribute_group); |
e6dfb2de | 541 | |
74ae66c3 TK |
542 | static ssize_t numa_node_show(struct device *dev, |
543 | struct device_attribute *attr, char *buf) | |
544 | { | |
545 | return sprintf(buf, "%d\n", dev_to_node(dev)); | |
546 | } | |
547 | static DEVICE_ATTR_RO(numa_node); | |
548 | ||
549 | static struct attribute *nd_numa_attributes[] = { | |
550 | &dev_attr_numa_node.attr, | |
551 | NULL, | |
552 | }; | |
553 | ||
554 | static umode_t nd_numa_attr_visible(struct kobject *kobj, struct attribute *a, | |
555 | int n) | |
556 | { | |
557 | if (!IS_ENABLED(CONFIG_NUMA)) | |
558 | return 0; | |
559 | ||
560 | return a->mode; | |
561 | } | |
562 | ||
563 | /** | |
564 | * nd_numa_attribute_group - NUMA attributes for all devices on an nd bus | |
565 | */ | |
566 | struct attribute_group nd_numa_attribute_group = { | |
567 | .attrs = nd_numa_attributes, | |
568 | .is_visible = nd_numa_attr_visible, | |
569 | }; | |
570 | EXPORT_SYMBOL_GPL(nd_numa_attribute_group); | |
571 | ||
45def22c DW |
572 | int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus) |
573 | { | |
574 | dev_t devt = MKDEV(nvdimm_bus_major, nvdimm_bus->id); | |
575 | struct device *dev; | |
576 | ||
577 | dev = device_create(nd_class, &nvdimm_bus->dev, devt, nvdimm_bus, | |
578 | "ndctl%d", nvdimm_bus->id); | |
579 | ||
42588958 | 580 | if (IS_ERR(dev)) |
45def22c DW |
581 | dev_dbg(&nvdimm_bus->dev, "failed to register ndctl%d: %ld\n", |
582 | nvdimm_bus->id, PTR_ERR(dev)); | |
42588958 | 583 | return PTR_ERR_OR_ZERO(dev); |
45def22c DW |
584 | } |
585 | ||
586 | void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus) | |
587 | { | |
588 | device_destroy(nd_class, MKDEV(nvdimm_bus_major, nvdimm_bus->id)); | |
589 | } | |
590 | ||
62232e45 DW |
591 | static const struct nd_cmd_desc __nd_cmd_dimm_descs[] = { |
592 | [ND_CMD_IMPLEMENTED] = { }, | |
593 | [ND_CMD_SMART] = { | |
594 | .out_num = 2, | |
21129112 | 595 | .out_sizes = { 4, 128, }, |
62232e45 DW |
596 | }, |
597 | [ND_CMD_SMART_THRESHOLD] = { | |
598 | .out_num = 2, | |
599 | .out_sizes = { 4, 8, }, | |
600 | }, | |
601 | [ND_CMD_DIMM_FLAGS] = { | |
602 | .out_num = 2, | |
603 | .out_sizes = { 4, 4 }, | |
604 | }, | |
605 | [ND_CMD_GET_CONFIG_SIZE] = { | |
606 | .out_num = 3, | |
607 | .out_sizes = { 4, 4, 4, }, | |
608 | }, | |
609 | [ND_CMD_GET_CONFIG_DATA] = { | |
610 | .in_num = 2, | |
611 | .in_sizes = { 4, 4, }, | |
612 | .out_num = 2, | |
613 | .out_sizes = { 4, UINT_MAX, }, | |
614 | }, | |
615 | [ND_CMD_SET_CONFIG_DATA] = { | |
616 | .in_num = 3, | |
617 | .in_sizes = { 4, 4, UINT_MAX, }, | |
618 | .out_num = 1, | |
619 | .out_sizes = { 4, }, | |
620 | }, | |
621 | [ND_CMD_VENDOR] = { | |
622 | .in_num = 3, | |
623 | .in_sizes = { 4, 4, UINT_MAX, }, | |
624 | .out_num = 3, | |
625 | .out_sizes = { 4, 4, UINT_MAX, }, | |
626 | }, | |
31eca76b DW |
627 | [ND_CMD_CALL] = { |
628 | .in_num = 2, | |
629 | .in_sizes = { sizeof(struct nd_cmd_pkg), UINT_MAX, }, | |
630 | .out_num = 1, | |
631 | .out_sizes = { UINT_MAX, }, | |
632 | }, | |
62232e45 DW |
633 | }; |
634 | ||
635 | const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd) | |
636 | { | |
637 | if (cmd < ARRAY_SIZE(__nd_cmd_dimm_descs)) | |
638 | return &__nd_cmd_dimm_descs[cmd]; | |
639 | return NULL; | |
640 | } | |
641 | EXPORT_SYMBOL_GPL(nd_cmd_dimm_desc); | |
642 | ||
643 | static const struct nd_cmd_desc __nd_cmd_bus_descs[] = { | |
644 | [ND_CMD_IMPLEMENTED] = { }, | |
645 | [ND_CMD_ARS_CAP] = { | |
646 | .in_num = 2, | |
647 | .in_sizes = { 8, 8, }, | |
4577b066 DW |
648 | .out_num = 4, |
649 | .out_sizes = { 4, 4, 4, 4, }, | |
62232e45 DW |
650 | }, |
651 | [ND_CMD_ARS_START] = { | |
4577b066 DW |
652 | .in_num = 5, |
653 | .in_sizes = { 8, 8, 2, 1, 5, }, | |
654 | .out_num = 2, | |
655 | .out_sizes = { 4, 4, }, | |
62232e45 DW |
656 | }, |
657 | [ND_CMD_ARS_STATUS] = { | |
747ffe11 DW |
658 | .out_num = 3, |
659 | .out_sizes = { 4, 4, UINT_MAX, }, | |
62232e45 | 660 | }, |
d4f32367 DW |
661 | [ND_CMD_CLEAR_ERROR] = { |
662 | .in_num = 2, | |
663 | .in_sizes = { 8, 8, }, | |
664 | .out_num = 3, | |
665 | .out_sizes = { 4, 4, 8, }, | |
666 | }, | |
31eca76b DW |
667 | [ND_CMD_CALL] = { |
668 | .in_num = 2, | |
669 | .in_sizes = { sizeof(struct nd_cmd_pkg), UINT_MAX, }, | |
670 | .out_num = 1, | |
671 | .out_sizes = { UINT_MAX, }, | |
672 | }, | |
62232e45 DW |
673 | }; |
674 | ||
675 | const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd) | |
676 | { | |
677 | if (cmd < ARRAY_SIZE(__nd_cmd_bus_descs)) | |
678 | return &__nd_cmd_bus_descs[cmd]; | |
679 | return NULL; | |
680 | } | |
681 | EXPORT_SYMBOL_GPL(nd_cmd_bus_desc); | |
682 | ||
683 | u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd, | |
684 | const struct nd_cmd_desc *desc, int idx, void *buf) | |
685 | { | |
686 | if (idx >= desc->in_num) | |
687 | return UINT_MAX; | |
688 | ||
689 | if (desc->in_sizes[idx] < UINT_MAX) | |
690 | return desc->in_sizes[idx]; | |
691 | ||
692 | if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA && idx == 2) { | |
693 | struct nd_cmd_set_config_hdr *hdr = buf; | |
694 | ||
695 | return hdr->in_length; | |
696 | } else if (nvdimm && cmd == ND_CMD_VENDOR && idx == 2) { | |
697 | struct nd_cmd_vendor_hdr *hdr = buf; | |
698 | ||
699 | return hdr->in_length; | |
31eca76b DW |
700 | } else if (cmd == ND_CMD_CALL) { |
701 | struct nd_cmd_pkg *pkg = buf; | |
702 | ||
703 | return pkg->nd_size_in; | |
62232e45 DW |
704 | } |
705 | ||
706 | return UINT_MAX; | |
707 | } | |
708 | EXPORT_SYMBOL_GPL(nd_cmd_in_size); | |
709 | ||
710 | u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd, | |
711 | const struct nd_cmd_desc *desc, int idx, const u32 *in_field, | |
712 | const u32 *out_field) | |
713 | { | |
714 | if (idx >= desc->out_num) | |
715 | return UINT_MAX; | |
716 | ||
717 | if (desc->out_sizes[idx] < UINT_MAX) | |
718 | return desc->out_sizes[idx]; | |
719 | ||
720 | if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA && idx == 1) | |
721 | return in_field[1]; | |
722 | else if (nvdimm && cmd == ND_CMD_VENDOR && idx == 2) | |
723 | return out_field[1]; | |
747ffe11 DW |
724 | else if (!nvdimm && cmd == ND_CMD_ARS_STATUS && idx == 2) |
725 | return out_field[1] - 8; | |
31eca76b DW |
726 | else if (cmd == ND_CMD_CALL) { |
727 | struct nd_cmd_pkg *pkg = (struct nd_cmd_pkg *) in_field; | |
728 | ||
729 | return pkg->nd_size_out; | |
730 | } | |
731 | ||
62232e45 DW |
732 | |
733 | return UINT_MAX; | |
734 | } | |
735 | EXPORT_SYMBOL_GPL(nd_cmd_out_size); | |
736 | ||
bf9bccc1 | 737 | void wait_nvdimm_bus_probe_idle(struct device *dev) |
eaf96153 | 738 | { |
bf9bccc1 DW |
739 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); |
740 | ||
eaf96153 DW |
741 | do { |
742 | if (nvdimm_bus->probe_active == 0) | |
743 | break; | |
744 | nvdimm_bus_unlock(&nvdimm_bus->dev); | |
745 | wait_event(nvdimm_bus->probe_wait, | |
746 | nvdimm_bus->probe_active == 0); | |
747 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
748 | } while (true); | |
749 | } | |
750 | ||
d4f32367 DW |
751 | static int pmem_active(struct device *dev, void *data) |
752 | { | |
753 | if (is_nd_pmem(dev) && dev->driver) | |
754 | return -EBUSY; | |
755 | return 0; | |
756 | } | |
757 | ||
eaf96153 | 758 | /* set_config requires an idle interleave set */ |
87bf572e DW |
759 | static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus, |
760 | struct nvdimm *nvdimm, unsigned int cmd) | |
eaf96153 | 761 | { |
87bf572e DW |
762 | struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; |
763 | ||
764 | /* ask the bus provider if it would like to block this request */ | |
765 | if (nd_desc->clear_to_send) { | |
766 | int rc = nd_desc->clear_to_send(nd_desc, nvdimm, cmd); | |
767 | ||
768 | if (rc) | |
769 | return rc; | |
770 | } | |
eaf96153 | 771 | |
d4f32367 DW |
772 | /* require clear error to go through the pmem driver */ |
773 | if (!nvdimm && cmd == ND_CMD_CLEAR_ERROR) | |
774 | return device_for_each_child(&nvdimm_bus->dev, NULL, | |
775 | pmem_active); | |
776 | ||
eaf96153 DW |
777 | if (!nvdimm || cmd != ND_CMD_SET_CONFIG_DATA) |
778 | return 0; | |
779 | ||
87bf572e | 780 | /* prevent label manipulation while the kernel owns label updates */ |
bf9bccc1 | 781 | wait_nvdimm_bus_probe_idle(&nvdimm_bus->dev); |
eaf96153 DW |
782 | if (atomic_read(&nvdimm->busy)) |
783 | return -EBUSY; | |
784 | return 0; | |
785 | } | |
786 | ||
62232e45 DW |
787 | static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm, |
788 | int read_only, unsigned int ioctl_cmd, unsigned long arg) | |
789 | { | |
790 | struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; | |
791 | size_t buf_len = 0, in_len = 0, out_len = 0; | |
792 | static char out_env[ND_CMD_MAX_ENVELOPE]; | |
793 | static char in_env[ND_CMD_MAX_ENVELOPE]; | |
794 | const struct nd_cmd_desc *desc = NULL; | |
795 | unsigned int cmd = _IOC_NR(ioctl_cmd); | |
796 | void __user *p = (void __user *) arg; | |
797 | struct device *dev = &nvdimm_bus->dev; | |
31eca76b | 798 | struct nd_cmd_pkg pkg; |
62232e45 | 799 | const char *cmd_name, *dimm_name; |
e3654eca | 800 | unsigned long cmd_mask; |
62232e45 DW |
801 | void *buf; |
802 | int rc, i; | |
803 | ||
804 | if (nvdimm) { | |
805 | desc = nd_cmd_dimm_desc(cmd); | |
806 | cmd_name = nvdimm_cmd_name(cmd); | |
e3654eca | 807 | cmd_mask = nvdimm->cmd_mask; |
62232e45 DW |
808 | dimm_name = dev_name(&nvdimm->dev); |
809 | } else { | |
810 | desc = nd_cmd_bus_desc(cmd); | |
811 | cmd_name = nvdimm_bus_cmd_name(cmd); | |
e3654eca | 812 | cmd_mask = nd_desc->cmd_mask; |
62232e45 DW |
813 | dimm_name = "bus"; |
814 | } | |
815 | ||
31eca76b DW |
816 | if (cmd == ND_CMD_CALL) { |
817 | if (copy_from_user(&pkg, p, sizeof(pkg))) | |
818 | return -EFAULT; | |
819 | } | |
820 | ||
62232e45 | 821 | if (!desc || (desc->out_num + desc->in_num == 0) || |
e3654eca | 822 | !test_bit(cmd, &cmd_mask)) |
62232e45 DW |
823 | return -ENOTTY; |
824 | ||
825 | /* fail write commands (when read-only) */ | |
826 | if (read_only) | |
07accfa9 JH |
827 | switch (cmd) { |
828 | case ND_CMD_VENDOR: | |
829 | case ND_CMD_SET_CONFIG_DATA: | |
830 | case ND_CMD_ARS_START: | |
d4f32367 | 831 | case ND_CMD_CLEAR_ERROR: |
31eca76b | 832 | case ND_CMD_CALL: |
62232e45 DW |
833 | dev_dbg(&nvdimm_bus->dev, "'%s' command while read-only.\n", |
834 | nvdimm ? nvdimm_cmd_name(cmd) | |
835 | : nvdimm_bus_cmd_name(cmd)); | |
836 | return -EPERM; | |
837 | default: | |
838 | break; | |
839 | } | |
840 | ||
841 | /* process an input envelope */ | |
842 | for (i = 0; i < desc->in_num; i++) { | |
843 | u32 in_size, copy; | |
844 | ||
845 | in_size = nd_cmd_in_size(nvdimm, cmd, desc, i, in_env); | |
846 | if (in_size == UINT_MAX) { | |
847 | dev_err(dev, "%s:%s unknown input size cmd: %s field: %d\n", | |
848 | __func__, dimm_name, cmd_name, i); | |
849 | return -ENXIO; | |
850 | } | |
62232e45 DW |
851 | if (in_len < sizeof(in_env)) |
852 | copy = min_t(u32, sizeof(in_env) - in_len, in_size); | |
853 | else | |
854 | copy = 0; | |
855 | if (copy && copy_from_user(&in_env[in_len], p + in_len, copy)) | |
856 | return -EFAULT; | |
857 | in_len += in_size; | |
858 | } | |
859 | ||
31eca76b DW |
860 | if (cmd == ND_CMD_CALL) { |
861 | dev_dbg(dev, "%s:%s, idx: %llu, in: %zu, out: %zu, len %zu\n", | |
862 | __func__, dimm_name, pkg.nd_command, | |
863 | in_len, out_len, buf_len); | |
864 | ||
865 | for (i = 0; i < ARRAY_SIZE(pkg.nd_reserved2); i++) | |
866 | if (pkg.nd_reserved2[i]) | |
867 | return -EINVAL; | |
868 | } | |
869 | ||
62232e45 DW |
870 | /* process an output envelope */ |
871 | for (i = 0; i < desc->out_num; i++) { | |
872 | u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, | |
873 | (u32 *) in_env, (u32 *) out_env); | |
874 | u32 copy; | |
875 | ||
876 | if (out_size == UINT_MAX) { | |
877 | dev_dbg(dev, "%s:%s unknown output size cmd: %s field: %d\n", | |
878 | __func__, dimm_name, cmd_name, i); | |
879 | return -EFAULT; | |
880 | } | |
62232e45 DW |
881 | if (out_len < sizeof(out_env)) |
882 | copy = min_t(u32, sizeof(out_env) - out_len, out_size); | |
883 | else | |
884 | copy = 0; | |
885 | if (copy && copy_from_user(&out_env[out_len], | |
886 | p + in_len + out_len, copy)) | |
887 | return -EFAULT; | |
888 | out_len += out_size; | |
889 | } | |
890 | ||
891 | buf_len = out_len + in_len; | |
62232e45 DW |
892 | if (buf_len > ND_IOCTL_MAX_BUFLEN) { |
893 | dev_dbg(dev, "%s:%s cmd: %s buf_len: %zu > %d\n", __func__, | |
894 | dimm_name, cmd_name, buf_len, | |
895 | ND_IOCTL_MAX_BUFLEN); | |
896 | return -EINVAL; | |
897 | } | |
898 | ||
899 | buf = vmalloc(buf_len); | |
900 | if (!buf) | |
901 | return -ENOMEM; | |
902 | ||
903 | if (copy_from_user(buf, p, buf_len)) { | |
904 | rc = -EFAULT; | |
905 | goto out; | |
906 | } | |
907 | ||
eaf96153 | 908 | nvdimm_bus_lock(&nvdimm_bus->dev); |
87bf572e | 909 | rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd); |
eaf96153 DW |
910 | if (rc) |
911 | goto out_unlock; | |
912 | ||
aef25338 | 913 | rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, NULL); |
62232e45 | 914 | if (rc < 0) |
eaf96153 | 915 | goto out_unlock; |
62232e45 DW |
916 | if (copy_to_user(p, buf, buf_len)) |
917 | rc = -EFAULT; | |
eaf96153 DW |
918 | out_unlock: |
919 | nvdimm_bus_unlock(&nvdimm_bus->dev); | |
62232e45 DW |
920 | out: |
921 | vfree(buf); | |
922 | return rc; | |
923 | } | |
924 | ||
45def22c DW |
925 | static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
926 | { | |
62232e45 | 927 | long id = (long) file->private_data; |
4dc0e7be | 928 | int rc = -ENXIO, ro; |
62232e45 DW |
929 | struct nvdimm_bus *nvdimm_bus; |
930 | ||
4dc0e7be | 931 | ro = ((file->f_flags & O_ACCMODE) == O_RDONLY); |
62232e45 DW |
932 | mutex_lock(&nvdimm_bus_list_mutex); |
933 | list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) { | |
934 | if (nvdimm_bus->id == id) { | |
4dc0e7be | 935 | rc = __nd_ioctl(nvdimm_bus, NULL, ro, cmd, arg); |
62232e45 DW |
936 | break; |
937 | } | |
938 | } | |
939 | mutex_unlock(&nvdimm_bus_list_mutex); | |
940 | ||
941 | return rc; | |
942 | } | |
943 | ||
944 | static int match_dimm(struct device *dev, void *data) | |
945 | { | |
946 | long id = (long) data; | |
947 | ||
948 | if (is_nvdimm(dev)) { | |
949 | struct nvdimm *nvdimm = to_nvdimm(dev); | |
950 | ||
951 | return nvdimm->id == id; | |
952 | } | |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | static long nvdimm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
958 | { | |
4dc0e7be | 959 | int rc = -ENXIO, ro; |
62232e45 DW |
960 | struct nvdimm_bus *nvdimm_bus; |
961 | ||
4dc0e7be | 962 | ro = ((file->f_flags & O_ACCMODE) == O_RDONLY); |
62232e45 DW |
963 | mutex_lock(&nvdimm_bus_list_mutex); |
964 | list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) { | |
965 | struct device *dev = device_find_child(&nvdimm_bus->dev, | |
966 | file->private_data, match_dimm); | |
967 | struct nvdimm *nvdimm; | |
968 | ||
969 | if (!dev) | |
970 | continue; | |
971 | ||
972 | nvdimm = to_nvdimm(dev); | |
4dc0e7be | 973 | rc = __nd_ioctl(nvdimm_bus, nvdimm, ro, cmd, arg); |
62232e45 DW |
974 | put_device(dev); |
975 | break; | |
976 | } | |
977 | mutex_unlock(&nvdimm_bus_list_mutex); | |
978 | ||
979 | return rc; | |
980 | } | |
981 | ||
982 | static int nd_open(struct inode *inode, struct file *file) | |
983 | { | |
984 | long minor = iminor(inode); | |
985 | ||
986 | file->private_data = (void *) minor; | |
987 | return 0; | |
45def22c DW |
988 | } |
989 | ||
990 | static const struct file_operations nvdimm_bus_fops = { | |
991 | .owner = THIS_MODULE, | |
62232e45 | 992 | .open = nd_open, |
45def22c DW |
993 | .unlocked_ioctl = nd_ioctl, |
994 | .compat_ioctl = nd_ioctl, | |
995 | .llseek = noop_llseek, | |
996 | }; | |
997 | ||
62232e45 DW |
998 | static const struct file_operations nvdimm_fops = { |
999 | .owner = THIS_MODULE, | |
1000 | .open = nd_open, | |
1001 | .unlocked_ioctl = nvdimm_ioctl, | |
1002 | .compat_ioctl = nvdimm_ioctl, | |
1003 | .llseek = noop_llseek, | |
1004 | }; | |
1005 | ||
45def22c DW |
1006 | int __init nvdimm_bus_init(void) |
1007 | { | |
1008 | int rc; | |
1009 | ||
baa51277 DW |
1010 | BUILD_BUG_ON(sizeof(struct nd_smart_payload) != 128); |
1011 | BUILD_BUG_ON(sizeof(struct nd_smart_threshold_payload) != 8); | |
1012 | ||
e6dfb2de DW |
1013 | rc = bus_register(&nvdimm_bus_type); |
1014 | if (rc) | |
1015 | return rc; | |
1016 | ||
45def22c DW |
1017 | rc = register_chrdev(0, "ndctl", &nvdimm_bus_fops); |
1018 | if (rc < 0) | |
62232e45 | 1019 | goto err_bus_chrdev; |
45def22c DW |
1020 | nvdimm_bus_major = rc; |
1021 | ||
62232e45 DW |
1022 | rc = register_chrdev(0, "dimmctl", &nvdimm_fops); |
1023 | if (rc < 0) | |
1024 | goto err_dimm_chrdev; | |
1025 | nvdimm_major = rc; | |
1026 | ||
45def22c | 1027 | nd_class = class_create(THIS_MODULE, "nd"); |
daa1dee4 AL |
1028 | if (IS_ERR(nd_class)) { |
1029 | rc = PTR_ERR(nd_class); | |
45def22c | 1030 | goto err_class; |
daa1dee4 | 1031 | } |
45def22c | 1032 | |
18515942 DW |
1033 | rc = driver_register(&nd_bus_driver.drv); |
1034 | if (rc) | |
1035 | goto err_nd_bus; | |
1036 | ||
45def22c DW |
1037 | return 0; |
1038 | ||
18515942 DW |
1039 | err_nd_bus: |
1040 | class_destroy(nd_class); | |
45def22c | 1041 | err_class: |
62232e45 DW |
1042 | unregister_chrdev(nvdimm_major, "dimmctl"); |
1043 | err_dimm_chrdev: | |
45def22c | 1044 | unregister_chrdev(nvdimm_bus_major, "ndctl"); |
62232e45 | 1045 | err_bus_chrdev: |
e6dfb2de | 1046 | bus_unregister(&nvdimm_bus_type); |
45def22c DW |
1047 | |
1048 | return rc; | |
1049 | } | |
1050 | ||
4d88a97a | 1051 | void nvdimm_bus_exit(void) |
45def22c | 1052 | { |
18515942 | 1053 | driver_unregister(&nd_bus_driver.drv); |
45def22c DW |
1054 | class_destroy(nd_class); |
1055 | unregister_chrdev(nvdimm_bus_major, "ndctl"); | |
62232e45 | 1056 | unregister_chrdev(nvdimm_major, "dimmctl"); |
e6dfb2de | 1057 | bus_unregister(&nvdimm_bus_type); |
18515942 | 1058 | ida_destroy(&nd_ida); |
45def22c | 1059 | } |