blob: 458daf9273362a19cc26d6a4f2c9113764f493b8 [file] [log] [blame]
Dan Williams45def222015-04-26 19:26:48 -04001/*
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
Dan Williams62232e452015-06-08 14:27:06 -040014#include <linux/vmalloc.h>
Dan Williams45def222015-04-26 19:26:48 -040015#include <linux/uaccess.h>
Dan Williams3d880022015-05-31 15:02:11 -040016#include <linux/module.h>
Dan Williams8c2f7e82015-06-25 04:20:04 -040017#include <linux/blkdev.h>
Dan Williams45def222015-04-26 19:26:48 -040018#include <linux/fcntl.h>
Dan Williamse6dfb2d2015-04-25 03:56:17 -040019#include <linux/async.h>
Dan Williams8c2f7e82015-06-25 04:20:04 -040020#include <linux/genhd.h>
Dan Williams62232e452015-06-08 14:27:06 -040021#include <linux/ndctl.h>
Dan Williams4d88a972015-05-31 14:41:48 -040022#include <linux/sched.h>
Dan Williams45def222015-04-26 19:26:48 -040023#include <linux/slab.h>
24#include <linux/fs.h>
25#include <linux/io.h>
Dan Williams62232e452015-06-08 14:27:06 -040026#include <linux/mm.h>
Dan Williams4d88a972015-05-31 14:41:48 -040027#include <linux/nd.h>
Dan Williams45def222015-04-26 19:26:48 -040028#include "nd-core.h"
Dan Williams4d88a972015-05-31 14:41:48 -040029#include "nd.h"
Dan Williams45def222015-04-26 19:26:48 -040030
Dan Williams62232e452015-06-08 14:27:06 -040031int nvdimm_major;
Dan Williams45def222015-04-26 19:26:48 -040032static int nvdimm_bus_major;
33static struct class *nd_class;
Dan Williams18515942016-07-22 23:46:08 -070034static DEFINE_IDA(nd_ida);
Dan Williams45def222015-04-26 19:26:48 -040035
Dan Williams4d88a972015-05-31 14:41:48 -040036static int to_nd_device_type(struct device *dev)
37{
38 if (is_nvdimm(dev))
39 return ND_DEVICE_DIMM;
Dan Williams3d880022015-05-31 15:02:11 -040040 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;
Dan Williamscd034122016-03-11 10:15:36 -080044 else if (is_nd_dax(dev))
45 return ND_DEVICE_DAX_PMEM;
Dan Williams3d880022015-05-31 15:02:11 -040046 else if (is_nd_pmem(dev->parent) || is_nd_blk(dev->parent))
47 return nd_region_to_nstype(to_nd_region(dev->parent));
Dan Williams4d88a972015-05-31 14:41:48 -040048
49 return 0;
50}
51
52static int nvdimm_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
53{
Toshi Kani41d7a6d2015-06-19 12:18:33 -060054 /*
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);
Dan Williams4d88a972015-05-31 14:41:48 -040060 return add_uevent_var(env, "MODALIAS=" ND_DEVICE_MODALIAS_FMT,
61 to_nd_device_type(dev));
62}
63
Dan Williams3d880022015-05-31 15:02:11 -040064static 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
Dan Williamsbc9775d2016-07-21 20:03:19 -070070 return nvdimm_bus->nd_desc->module;
Dan Williams3d880022015-05-31 15:02:11 -040071 }
72 return NULL;
73}
74
Dan Williamseaf96152015-05-01 13:11:27 -040075static 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
82static 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
Dan Williams4d88a972015-05-31 14:41:48 -040090static int nvdimm_bus_probe(struct device *dev)
91{
92 struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
Dan Williams3d880022015-05-31 15:02:11 -040093 struct module *provider = to_bus_provider(dev);
Dan Williams4d88a972015-05-31 14:41:48 -040094 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
95 int rc;
96
Dan Williams3d880022015-05-31 15:02:11 -040097 if (!try_module_get(provider))
98 return -ENXIO;
99
Dan Williamseaf96152015-05-01 13:11:27 -0400100 nvdimm_bus_probe_start(nvdimm_bus);
Dan Williams4d88a972015-05-31 14:41:48 -0400101 rc = nd_drv->probe(dev);
Dan Williamseaf96152015-05-01 13:11:27 -0400102 if (rc == 0)
103 nd_region_probe_success(nvdimm_bus, dev);
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400104 else
105 nd_region_disable(nvdimm_bus, dev);
Dan Williamseaf96152015-05-01 13:11:27 -0400106 nvdimm_bus_probe_end(nvdimm_bus);
107
Dan Williams4d88a972015-05-31 14:41:48 -0400108 dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name,
109 dev_name(dev), rc);
Dan Williams8c2f7e82015-06-25 04:20:04 -0400110
Dan Williams3d880022015-05-31 15:02:11 -0400111 if (rc != 0)
112 module_put(provider);
Dan Williams4d88a972015-05-31 14:41:48 -0400113 return rc;
114}
115
116static int nvdimm_bus_remove(struct device *dev)
117{
118 struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
Dan Williams3d880022015-05-31 15:02:11 -0400119 struct module *provider = to_bus_provider(dev);
Dan Williams4d88a972015-05-31 14:41:48 -0400120 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
Dan Williams6cf9c5b2016-05-18 09:13:13 -0700121 int rc = 0;
Dan Williams4d88a972015-05-31 14:41:48 -0400122
Dan Williams6cf9c5b2016-05-18 09:13:13 -0700123 if (nd_drv->remove)
124 rc = nd_drv->remove(dev);
Dan Williamseaf96152015-05-01 13:11:27 -0400125 nd_region_disable(nvdimm_bus, dev);
126
Dan Williams4d88a972015-05-31 14:41:48 -0400127 dev_dbg(&nvdimm_bus->dev, "%s.remove(%s) = %d\n", dev->driver->name,
128 dev_name(dev), rc);
Dan Williams3d880022015-05-31 15:02:11 -0400129 module_put(provider);
Dan Williams4d88a972015-05-31 14:41:48 -0400130 return rc;
131}
132
Dan Williams476f8482016-07-09 00:12:52 -0700133static 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
Dan Williams71999462016-02-18 10:29:49 -0800148void 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}
160EXPORT_SYMBOL(nd_device_notify);
161
162void 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}
172EXPORT_SYMBOL_GPL(nvdimm_region_notify);
173
Dan Williams59e64732016-03-08 07:16:07 -0800174long 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}
218EXPORT_SYMBOL_GPL(nvdimm_clear_poison);
219
Dan Williams18515942016-07-22 23:46:08 -0700220static int nvdimm_bus_match(struct device *dev, struct device_driver *drv);
221
Dan Williams4d88a972015-05-31 14:41:48 -0400222static struct bus_type nvdimm_bus_type = {
Dan Williamse6dfb2d2015-04-25 03:56:17 -0400223 .name = "nd",
Dan Williams4d88a972015-05-31 14:41:48 -0400224 .uevent = nvdimm_bus_uevent,
225 .match = nvdimm_bus_match,
226 .probe = nvdimm_bus_probe,
227 .remove = nvdimm_bus_remove,
Dan Williams476f8482016-07-09 00:12:52 -0700228 .shutdown = nvdimm_bus_shutdown,
Dan Williamse6dfb2d2015-04-25 03:56:17 -0400229};
230
Dan Williams18515942016-07-22 23:46:08 -0700231static 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
240static bool is_nvdimm_bus(struct device *dev)
241{
242 return dev->release == nvdimm_bus_release;
243}
244
245struct 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
258struct 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}
266EXPORT_SYMBOL_GPL(to_nvdimm_bus);
267
268struct 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}
304EXPORT_SYMBOL_GPL(nvdimm_bus_register);
305
306void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus)
307{
308 if (!nvdimm_bus)
309 return;
310 device_unregister(&nvdimm_bus->dev);
311}
312EXPORT_SYMBOL_GPL(nvdimm_bus_unregister);
313
314static 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
329static 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
340static 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
360static 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
379static 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 },
389};
390
391static 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
Dan Williams4d88a972015-05-31 14:41:48 -0400401static ASYNC_DOMAIN_EXCLUSIVE(nd_async_domain);
402
403void nd_synchronize(void)
404{
405 async_synchronize_full_domain(&nd_async_domain);
406}
407EXPORT_SYMBOL_GPL(nd_synchronize);
408
409static 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
420static void nd_async_device_unregister(void *d, async_cookie_t cookie)
421{
422 struct device *dev = d;
423
Dan Williams0ba1c632015-05-30 12:35:36 -0400424 /* flush bus operations before delete */
425 nvdimm_bus_lock(dev);
426 nvdimm_bus_unlock(dev);
427
Dan Williams4d88a972015-05-31 14:41:48 -0400428 device_unregister(dev);
429 put_device(dev);
430}
431
Dan Williams8c2f7e82015-06-25 04:20:04 -0400432void __nd_device_register(struct device *dev)
Dan Williams4d88a972015-05-31 14:41:48 -0400433{
Dan Williamscd034122016-03-11 10:15:36 -0800434 if (!dev)
435 return;
Dan Williams4d88a972015-05-31 14:41:48 -0400436 dev->bus = &nvdimm_bus_type;
Dan Williams4d88a972015-05-31 14:41:48 -0400437 get_device(dev);
438 async_schedule_domain(nd_async_device_register, dev,
439 &nd_async_domain);
440}
Dan Williams8c2f7e82015-06-25 04:20:04 -0400441
442void nd_device_register(struct device *dev)
443{
444 device_initialize(dev);
445 __nd_device_register(dev);
446}
Dan Williams4d88a972015-05-31 14:41:48 -0400447EXPORT_SYMBOL(nd_device_register);
448
449void 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}
463EXPORT_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 */
471int __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
Dan Williams6cf9c5b2016-05-18 09:13:13 -0700482 if (!nd_drv->probe) {
483 pr_debug("%s ->probe() must be specified\n", mod_name);
Dan Williams4d88a972015-05-31 14:41:48 -0400484 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}
493EXPORT_SYMBOL(__nd_driver_register);
494
Dan Williams58138822015-06-23 20:08:34 -0400495int nvdimm_revalidate_disk(struct gendisk *disk)
496{
Dan Williams52c44d92016-06-15 19:43:07 -0700497 struct device *dev = disk_to_dev(disk)->parent;
Dan Williams58138822015-06-23 20:08:34 -0400498 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}
511EXPORT_SYMBOL(nvdimm_revalidate_disk);
512
Dan Williams4d88a972015-05-31 14:41:48 -0400513static 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}
519static DEVICE_ATTR_RO(modalias);
520
521static 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}
526static DEVICE_ATTR_RO(devtype);
527
528static 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 */
537struct attribute_group nd_device_attribute_group = {
538 .attrs = nd_device_attributes,
539};
540EXPORT_SYMBOL_GPL(nd_device_attribute_group);
541
Toshi Kani74ae66c2015-06-19 12:18:34 -0600542static 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}
547static DEVICE_ATTR_RO(numa_node);
548
549static struct attribute *nd_numa_attributes[] = {
550 &dev_attr_numa_node.attr,
551 NULL,
552};
553
554static 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 */
566struct attribute_group nd_numa_attribute_group = {
567 .attrs = nd_numa_attributes,
568 .is_visible = nd_numa_attr_visible,
569};
570EXPORT_SYMBOL_GPL(nd_numa_attribute_group);
571
Dan Williams45def222015-04-26 19:26:48 -0400572int 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
Dan Williams42588952016-05-27 13:28:31 -0700580 if (IS_ERR(dev))
Dan Williams45def222015-04-26 19:26:48 -0400581 dev_dbg(&nvdimm_bus->dev, "failed to register ndctl%d: %ld\n",
582 nvdimm_bus->id, PTR_ERR(dev));
Dan Williams42588952016-05-27 13:28:31 -0700583 return PTR_ERR_OR_ZERO(dev);
Dan Williams45def222015-04-26 19:26:48 -0400584}
585
586void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus)
587{
588 device_destroy(nd_class, MKDEV(nvdimm_bus_major, nvdimm_bus->id));
589}
590
Dan Williams62232e452015-06-08 14:27:06 -0400591static const struct nd_cmd_desc __nd_cmd_dimm_descs[] = {
592 [ND_CMD_IMPLEMENTED] = { },
593 [ND_CMD_SMART] = {
594 .out_num = 2,
Dan Williams21129112016-04-07 19:58:44 -0700595 .out_sizes = { 4, 128, },
Dan Williams62232e452015-06-08 14:27:06 -0400596 },
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 },
Dan Williams31eca762016-04-28 16:23:43 -0700627 [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 },
Dan Williams62232e452015-06-08 14:27:06 -0400633};
634
635const 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}
641EXPORT_SYMBOL_GPL(nd_cmd_dimm_desc);
642
643static 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, },
Dan Williams4577b062016-02-17 13:08:58 -0800648 .out_num = 4,
649 .out_sizes = { 4, 4, 4, 4, },
Dan Williams62232e452015-06-08 14:27:06 -0400650 },
651 [ND_CMD_ARS_START] = {
Dan Williams4577b062016-02-17 13:08:58 -0800652 .in_num = 5,
653 .in_sizes = { 8, 8, 2, 1, 5, },
654 .out_num = 2,
655 .out_sizes = { 4, 4, },
Dan Williams62232e452015-06-08 14:27:06 -0400656 },
657 [ND_CMD_ARS_STATUS] = {
Dan Williams747ffe12016-02-19 15:21:14 -0800658 .out_num = 3,
659 .out_sizes = { 4, 4, UINT_MAX, },
Dan Williams62232e452015-06-08 14:27:06 -0400660 },
Dan Williamsd4f32362016-03-03 16:08:54 -0800661 [ND_CMD_CLEAR_ERROR] = {
662 .in_num = 2,
663 .in_sizes = { 8, 8, },
664 .out_num = 3,
665 .out_sizes = { 4, 4, 8, },
666 },
Dan Williams31eca762016-04-28 16:23:43 -0700667 [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 },
Dan Williams62232e452015-06-08 14:27:06 -0400673};
674
675const 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}
681EXPORT_SYMBOL_GPL(nd_cmd_bus_desc);
682
683u32 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;
Dan Williams31eca762016-04-28 16:23:43 -0700700 } else if (cmd == ND_CMD_CALL) {
701 struct nd_cmd_pkg *pkg = buf;
702
703 return pkg->nd_size_in;
Dan Williams62232e452015-06-08 14:27:06 -0400704 }
705
706 return UINT_MAX;
707}
708EXPORT_SYMBOL_GPL(nd_cmd_in_size);
709
710u32 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];
Dan Williams747ffe12016-02-19 15:21:14 -0800724 else if (!nvdimm && cmd == ND_CMD_ARS_STATUS && idx == 2)
725 return out_field[1] - 8;
Dan Williams31eca762016-04-28 16:23:43 -0700726 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
Dan Williams62232e452015-06-08 14:27:06 -0400732
733 return UINT_MAX;
734}
735EXPORT_SYMBOL_GPL(nd_cmd_out_size);
736
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400737void wait_nvdimm_bus_probe_idle(struct device *dev)
Dan Williamseaf96152015-05-01 13:11:27 -0400738{
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400739 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
740
Dan Williamseaf96152015-05-01 13:11:27 -0400741 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
Dan Williamsd4f32362016-03-03 16:08:54 -0800751static 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
Dan Williamseaf96152015-05-01 13:11:27 -0400758/* set_config requires an idle interleave set */
Dan Williams87bf5722016-02-22 21:50:31 -0800759static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus,
760 struct nvdimm *nvdimm, unsigned int cmd)
Dan Williamseaf96152015-05-01 13:11:27 -0400761{
Dan Williams87bf5722016-02-22 21:50:31 -0800762 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 }
Dan Williamseaf96152015-05-01 13:11:27 -0400771
Dan Williamsd4f32362016-03-03 16:08:54 -0800772 /* 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
Dan Williamseaf96152015-05-01 13:11:27 -0400777 if (!nvdimm || cmd != ND_CMD_SET_CONFIG_DATA)
778 return 0;
779
Dan Williams87bf5722016-02-22 21:50:31 -0800780 /* prevent label manipulation while the kernel owns label updates */
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400781 wait_nvdimm_bus_probe_idle(&nvdimm_bus->dev);
Dan Williamseaf96152015-05-01 13:11:27 -0400782 if (atomic_read(&nvdimm->busy))
783 return -EBUSY;
784 return 0;
785}
786
Dan Williams62232e452015-06-08 14:27:06 -0400787static 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;
Dan Williams31eca762016-04-28 16:23:43 -0700798 struct nd_cmd_pkg pkg;
Dan Williams62232e452015-06-08 14:27:06 -0400799 const char *cmd_name, *dimm_name;
Dan Williamse3654ec2016-04-28 16:17:07 -0700800 unsigned long cmd_mask;
Dan Williams62232e452015-06-08 14:27:06 -0400801 void *buf;
802 int rc, i;
803
804 if (nvdimm) {
805 desc = nd_cmd_dimm_desc(cmd);
806 cmd_name = nvdimm_cmd_name(cmd);
Dan Williamse3654ec2016-04-28 16:17:07 -0700807 cmd_mask = nvdimm->cmd_mask;
Dan Williams62232e452015-06-08 14:27:06 -0400808 dimm_name = dev_name(&nvdimm->dev);
809 } else {
810 desc = nd_cmd_bus_desc(cmd);
811 cmd_name = nvdimm_bus_cmd_name(cmd);
Dan Williamse3654ec2016-04-28 16:17:07 -0700812 cmd_mask = nd_desc->cmd_mask;
Dan Williams62232e452015-06-08 14:27:06 -0400813 dimm_name = "bus";
814 }
815
Dan Williams31eca762016-04-28 16:23:43 -0700816 if (cmd == ND_CMD_CALL) {
817 if (copy_from_user(&pkg, p, sizeof(pkg)))
818 return -EFAULT;
819 }
820
Dan Williams62232e452015-06-08 14:27:06 -0400821 if (!desc || (desc->out_num + desc->in_num == 0) ||
Dan Williamse3654ec2016-04-28 16:17:07 -0700822 !test_bit(cmd, &cmd_mask))
Dan Williams62232e452015-06-08 14:27:06 -0400823 return -ENOTTY;
824
825 /* fail write commands (when read-only) */
826 if (read_only)
Jerry Hoemann07accfa2016-01-06 16:03:41 -0700827 switch (cmd) {
828 case ND_CMD_VENDOR:
829 case ND_CMD_SET_CONFIG_DATA:
830 case ND_CMD_ARS_START:
Dan Williamsd4f32362016-03-03 16:08:54 -0800831 case ND_CMD_CLEAR_ERROR:
Dan Williams31eca762016-04-28 16:23:43 -0700832 case ND_CMD_CALL:
Dan Williams62232e452015-06-08 14:27:06 -0400833 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 }
Dan Williams62232e452015-06-08 14:27:06 -0400851 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
Dan Williams31eca762016-04-28 16:23:43 -0700860 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
Dan Williams62232e452015-06-08 14:27:06 -0400870 /* 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 }
Dan Williams62232e452015-06-08 14:27:06 -0400881 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;
Dan Williams62232e452015-06-08 14:27:06 -0400892 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
Dan Williamseaf96152015-05-01 13:11:27 -0400908 nvdimm_bus_lock(&nvdimm_bus->dev);
Dan Williams87bf5722016-02-22 21:50:31 -0800909 rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd);
Dan Williamseaf96152015-05-01 13:11:27 -0400910 if (rc)
911 goto out_unlock;
912
Dan Williamsaef25332016-02-12 17:01:11 -0800913 rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, NULL);
Dan Williams62232e452015-06-08 14:27:06 -0400914 if (rc < 0)
Dan Williamseaf96152015-05-01 13:11:27 -0400915 goto out_unlock;
Dan Williams62232e452015-06-08 14:27:06 -0400916 if (copy_to_user(p, buf, buf_len))
917 rc = -EFAULT;
Dan Williamseaf96152015-05-01 13:11:27 -0400918 out_unlock:
919 nvdimm_bus_unlock(&nvdimm_bus->dev);
Dan Williams62232e452015-06-08 14:27:06 -0400920 out:
921 vfree(buf);
922 return rc;
923}
924
Dan Williams45def222015-04-26 19:26:48 -0400925static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
926{
Dan Williams62232e452015-06-08 14:27:06 -0400927 long id = (long) file->private_data;
Jerry Hoemann4dc0e7b2016-01-06 16:03:39 -0700928 int rc = -ENXIO, ro;
Dan Williams62232e452015-06-08 14:27:06 -0400929 struct nvdimm_bus *nvdimm_bus;
930
Jerry Hoemann4dc0e7b2016-01-06 16:03:39 -0700931 ro = ((file->f_flags & O_ACCMODE) == O_RDONLY);
Dan Williams62232e452015-06-08 14:27:06 -0400932 mutex_lock(&nvdimm_bus_list_mutex);
933 list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) {
934 if (nvdimm_bus->id == id) {
Jerry Hoemann4dc0e7b2016-01-06 16:03:39 -0700935 rc = __nd_ioctl(nvdimm_bus, NULL, ro, cmd, arg);
Dan Williams62232e452015-06-08 14:27:06 -0400936 break;
937 }
938 }
939 mutex_unlock(&nvdimm_bus_list_mutex);
940
941 return rc;
942}
943
944static 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
957static long nvdimm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
958{
Jerry Hoemann4dc0e7b2016-01-06 16:03:39 -0700959 int rc = -ENXIO, ro;
Dan Williams62232e452015-06-08 14:27:06 -0400960 struct nvdimm_bus *nvdimm_bus;
961
Jerry Hoemann4dc0e7b2016-01-06 16:03:39 -0700962 ro = ((file->f_flags & O_ACCMODE) == O_RDONLY);
Dan Williams62232e452015-06-08 14:27:06 -0400963 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);
Jerry Hoemann4dc0e7b2016-01-06 16:03:39 -0700973 rc = __nd_ioctl(nvdimm_bus, nvdimm, ro, cmd, arg);
Dan Williams62232e452015-06-08 14:27:06 -0400974 put_device(dev);
975 break;
976 }
977 mutex_unlock(&nvdimm_bus_list_mutex);
978
979 return rc;
980}
981
982static 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;
Dan Williams45def222015-04-26 19:26:48 -0400988}
989
990static const struct file_operations nvdimm_bus_fops = {
991 .owner = THIS_MODULE,
Dan Williams62232e452015-06-08 14:27:06 -0400992 .open = nd_open,
Dan Williams45def222015-04-26 19:26:48 -0400993 .unlocked_ioctl = nd_ioctl,
994 .compat_ioctl = nd_ioctl,
995 .llseek = noop_llseek,
996};
997
Dan Williams62232e452015-06-08 14:27:06 -0400998static 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
Dan Williams45def222015-04-26 19:26:48 -04001006int __init nvdimm_bus_init(void)
1007{
1008 int rc;
1009
Dan Williamsbaa51272016-04-05 17:40:52 -07001010 BUILD_BUG_ON(sizeof(struct nd_smart_payload) != 128);
1011 BUILD_BUG_ON(sizeof(struct nd_smart_threshold_payload) != 8);
1012
Dan Williamse6dfb2d2015-04-25 03:56:17 -04001013 rc = bus_register(&nvdimm_bus_type);
1014 if (rc)
1015 return rc;
1016
Dan Williams45def222015-04-26 19:26:48 -04001017 rc = register_chrdev(0, "ndctl", &nvdimm_bus_fops);
1018 if (rc < 0)
Dan Williams62232e452015-06-08 14:27:06 -04001019 goto err_bus_chrdev;
Dan Williams45def222015-04-26 19:26:48 -04001020 nvdimm_bus_major = rc;
1021
Dan Williams62232e452015-06-08 14:27:06 -04001022 rc = register_chrdev(0, "dimmctl", &nvdimm_fops);
1023 if (rc < 0)
1024 goto err_dimm_chrdev;
1025 nvdimm_major = rc;
1026
Dan Williams45def222015-04-26 19:26:48 -04001027 nd_class = class_create(THIS_MODULE, "nd");
Axel Lindaa1dee2015-06-28 17:00:57 +08001028 if (IS_ERR(nd_class)) {
1029 rc = PTR_ERR(nd_class);
Dan Williams45def222015-04-26 19:26:48 -04001030 goto err_class;
Axel Lindaa1dee2015-06-28 17:00:57 +08001031 }
Dan Williams45def222015-04-26 19:26:48 -04001032
Dan Williams18515942016-07-22 23:46:08 -07001033 rc = driver_register(&nd_bus_driver.drv);
1034 if (rc)
1035 goto err_nd_bus;
1036
Dan Williams45def222015-04-26 19:26:48 -04001037 return 0;
1038
Dan Williams18515942016-07-22 23:46:08 -07001039 err_nd_bus:
1040 class_destroy(nd_class);
Dan Williams45def222015-04-26 19:26:48 -04001041 err_class:
Dan Williams62232e452015-06-08 14:27:06 -04001042 unregister_chrdev(nvdimm_major, "dimmctl");
1043 err_dimm_chrdev:
Dan Williams45def222015-04-26 19:26:48 -04001044 unregister_chrdev(nvdimm_bus_major, "ndctl");
Dan Williams62232e452015-06-08 14:27:06 -04001045 err_bus_chrdev:
Dan Williamse6dfb2d2015-04-25 03:56:17 -04001046 bus_unregister(&nvdimm_bus_type);
Dan Williams45def222015-04-26 19:26:48 -04001047
1048 return rc;
1049}
1050
Dan Williams4d88a972015-05-31 14:41:48 -04001051void nvdimm_bus_exit(void)
Dan Williams45def222015-04-26 19:26:48 -04001052{
Dan Williams18515942016-07-22 23:46:08 -07001053 driver_unregister(&nd_bus_driver.drv);
Dan Williams45def222015-04-26 19:26:48 -04001054 class_destroy(nd_class);
1055 unregister_chrdev(nvdimm_bus_major, "ndctl");
Dan Williams62232e452015-06-08 14:27:06 -04001056 unregister_chrdev(nvdimm_major, "dimmctl");
Dan Williamse6dfb2d2015-04-25 03:56:17 -04001057 bus_unregister(&nvdimm_bus_type);
Dan Williams18515942016-07-22 23:46:08 -07001058 ida_destroy(&nd_ida);
Dan Williams45def222015-04-26 19:26:48 -04001059}