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b94d5230 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 | #include <linux/libnvdimm.h> | |
b95f5f43 | 14 | #include <linux/badblocks.h> |
b94d5230 DW |
15 | #include <linux/export.h> |
16 | #include <linux/module.h> | |
41cd8b70 | 17 | #include <linux/blkdev.h> |
b94d5230 | 18 | #include <linux/device.h> |
bf9bccc1 | 19 | #include <linux/ctype.h> |
62232e45 | 20 | #include <linux/ndctl.h> |
45def22c | 21 | #include <linux/mutex.h> |
b94d5230 DW |
22 | #include <linux/slab.h> |
23 | #include "nd-core.h" | |
4d88a97a | 24 | #include "nd.h" |
b94d5230 | 25 | |
e6dfb2de DW |
26 | LIST_HEAD(nvdimm_bus_list); |
27 | DEFINE_MUTEX(nvdimm_bus_list_mutex); | |
b94d5230 DW |
28 | static DEFINE_IDA(nd_ida); |
29 | ||
3d88002e DW |
30 | void nvdimm_bus_lock(struct device *dev) |
31 | { | |
32 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
33 | ||
34 | if (!nvdimm_bus) | |
35 | return; | |
36 | mutex_lock(&nvdimm_bus->reconfig_mutex); | |
37 | } | |
38 | EXPORT_SYMBOL(nvdimm_bus_lock); | |
39 | ||
40 | void nvdimm_bus_unlock(struct device *dev) | |
41 | { | |
42 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
43 | ||
44 | if (!nvdimm_bus) | |
45 | return; | |
46 | mutex_unlock(&nvdimm_bus->reconfig_mutex); | |
47 | } | |
48 | EXPORT_SYMBOL(nvdimm_bus_unlock); | |
49 | ||
50 | bool is_nvdimm_bus_locked(struct device *dev) | |
51 | { | |
52 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
53 | ||
54 | if (!nvdimm_bus) | |
55 | return false; | |
56 | return mutex_is_locked(&nvdimm_bus->reconfig_mutex); | |
57 | } | |
58 | EXPORT_SYMBOL(is_nvdimm_bus_locked); | |
59 | ||
eaf96153 DW |
60 | u64 nd_fletcher64(void *addr, size_t len, bool le) |
61 | { | |
62 | u32 *buf = addr; | |
63 | u32 lo32 = 0; | |
64 | u64 hi32 = 0; | |
65 | int i; | |
66 | ||
67 | for (i = 0; i < len / sizeof(u32); i++) { | |
68 | lo32 += le ? le32_to_cpu((__le32) buf[i]) : buf[i]; | |
69 | hi32 += lo32; | |
70 | } | |
71 | ||
72 | return hi32 << 32 | lo32; | |
73 | } | |
74 | EXPORT_SYMBOL_GPL(nd_fletcher64); | |
75 | ||
b94d5230 DW |
76 | static void nvdimm_bus_release(struct device *dev) |
77 | { | |
78 | struct nvdimm_bus *nvdimm_bus; | |
79 | ||
80 | nvdimm_bus = container_of(dev, struct nvdimm_bus, dev); | |
81 | ida_simple_remove(&nd_ida, nvdimm_bus->id); | |
82 | kfree(nvdimm_bus); | |
83 | } | |
84 | ||
45def22c DW |
85 | struct nvdimm_bus *to_nvdimm_bus(struct device *dev) |
86 | { | |
87 | struct nvdimm_bus *nvdimm_bus; | |
88 | ||
89 | nvdimm_bus = container_of(dev, struct nvdimm_bus, dev); | |
90 | WARN_ON(nvdimm_bus->dev.release != nvdimm_bus_release); | |
91 | return nvdimm_bus; | |
92 | } | |
93 | EXPORT_SYMBOL_GPL(to_nvdimm_bus); | |
94 | ||
95 | struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus) | |
96 | { | |
97 | /* struct nvdimm_bus definition is private to libnvdimm */ | |
98 | return nvdimm_bus->nd_desc; | |
99 | } | |
100 | EXPORT_SYMBOL_GPL(to_nd_desc); | |
101 | ||
e6dfb2de DW |
102 | struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev) |
103 | { | |
104 | struct device *dev; | |
105 | ||
106 | for (dev = nd_dev; dev; dev = dev->parent) | |
107 | if (dev->release == nvdimm_bus_release) | |
108 | break; | |
109 | dev_WARN_ONCE(nd_dev, !dev, "invalid dev, not on nd bus\n"); | |
110 | if (dev) | |
111 | return to_nvdimm_bus(dev); | |
112 | return NULL; | |
113 | } | |
114 | ||
bf9bccc1 DW |
115 | static bool is_uuid_sep(char sep) |
116 | { | |
117 | if (sep == '\n' || sep == '-' || sep == ':' || sep == '\0') | |
118 | return true; | |
119 | return false; | |
120 | } | |
121 | ||
122 | static int nd_uuid_parse(struct device *dev, u8 *uuid_out, const char *buf, | |
123 | size_t len) | |
124 | { | |
125 | const char *str = buf; | |
126 | u8 uuid[16]; | |
127 | int i; | |
128 | ||
129 | for (i = 0; i < 16; i++) { | |
130 | if (!isxdigit(str[0]) || !isxdigit(str[1])) { | |
131 | dev_dbg(dev, "%s: pos: %d buf[%zd]: %c buf[%zd]: %c\n", | |
132 | __func__, i, str - buf, str[0], | |
133 | str + 1 - buf, str[1]); | |
134 | return -EINVAL; | |
135 | } | |
136 | ||
137 | uuid[i] = (hex_to_bin(str[0]) << 4) | hex_to_bin(str[1]); | |
138 | str += 2; | |
139 | if (is_uuid_sep(*str)) | |
140 | str++; | |
141 | } | |
142 | ||
143 | memcpy(uuid_out, uuid, sizeof(uuid)); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | /** | |
148 | * nd_uuid_store: common implementation for writing 'uuid' sysfs attributes | |
149 | * @dev: container device for the uuid property | |
150 | * @uuid_out: uuid buffer to replace | |
151 | * @buf: raw sysfs buffer to parse | |
152 | * | |
153 | * Enforce that uuids can only be changed while the device is disabled | |
154 | * (driver detached) | |
155 | * LOCKING: expects device_lock() is held on entry | |
156 | */ | |
157 | int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf, | |
158 | size_t len) | |
159 | { | |
160 | u8 uuid[16]; | |
161 | int rc; | |
162 | ||
163 | if (dev->driver) | |
164 | return -EBUSY; | |
165 | ||
166 | rc = nd_uuid_parse(dev, uuid, buf, len); | |
167 | if (rc) | |
168 | return rc; | |
169 | ||
170 | kfree(*uuid_out); | |
171 | *uuid_out = kmemdup(uuid, sizeof(uuid), GFP_KERNEL); | |
172 | if (!(*uuid_out)) | |
173 | return -ENOMEM; | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
1b40e09a DW |
178 | ssize_t nd_sector_size_show(unsigned long current_lbasize, |
179 | const unsigned long *supported, char *buf) | |
180 | { | |
181 | ssize_t len = 0; | |
182 | int i; | |
183 | ||
184 | for (i = 0; supported[i]; i++) | |
185 | if (current_lbasize == supported[i]) | |
186 | len += sprintf(buf + len, "[%ld] ", supported[i]); | |
187 | else | |
188 | len += sprintf(buf + len, "%ld ", supported[i]); | |
189 | len += sprintf(buf + len, "\n"); | |
190 | return len; | |
191 | } | |
192 | ||
193 | ssize_t nd_sector_size_store(struct device *dev, const char *buf, | |
194 | unsigned long *current_lbasize, const unsigned long *supported) | |
195 | { | |
196 | unsigned long lbasize; | |
197 | int rc, i; | |
198 | ||
199 | if (dev->driver) | |
200 | return -EBUSY; | |
201 | ||
202 | rc = kstrtoul(buf, 0, &lbasize); | |
203 | if (rc) | |
204 | return rc; | |
205 | ||
206 | for (i = 0; supported[i]; i++) | |
207 | if (lbasize == supported[i]) | |
208 | break; | |
209 | ||
210 | if (supported[i]) { | |
211 | *current_lbasize = lbasize; | |
212 | return 0; | |
213 | } else { | |
214 | return -EINVAL; | |
215 | } | |
216 | } | |
217 | ||
f0dc089c DW |
218 | void __nd_iostat_start(struct bio *bio, unsigned long *start) |
219 | { | |
220 | struct gendisk *disk = bio->bi_bdev->bd_disk; | |
221 | const int rw = bio_data_dir(bio); | |
222 | int cpu = part_stat_lock(); | |
223 | ||
224 | *start = jiffies; | |
225 | part_round_stats(cpu, &disk->part0); | |
226 | part_stat_inc(cpu, &disk->part0, ios[rw]); | |
227 | part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); | |
228 | part_inc_in_flight(&disk->part0, rw); | |
229 | part_stat_unlock(); | |
230 | } | |
231 | EXPORT_SYMBOL(__nd_iostat_start); | |
232 | ||
233 | void nd_iostat_end(struct bio *bio, unsigned long start) | |
234 | { | |
235 | struct gendisk *disk = bio->bi_bdev->bd_disk; | |
236 | unsigned long duration = jiffies - start; | |
237 | const int rw = bio_data_dir(bio); | |
238 | int cpu = part_stat_lock(); | |
239 | ||
240 | part_stat_add(cpu, &disk->part0, ticks[rw], duration); | |
241 | part_round_stats(cpu, &disk->part0); | |
242 | part_dec_in_flight(&disk->part0, rw); | |
243 | part_stat_unlock(); | |
244 | } | |
245 | EXPORT_SYMBOL(nd_iostat_end); | |
246 | ||
62232e45 DW |
247 | static ssize_t commands_show(struct device *dev, |
248 | struct device_attribute *attr, char *buf) | |
249 | { | |
250 | int cmd, len = 0; | |
251 | struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); | |
252 | struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; | |
253 | ||
254 | for_each_set_bit(cmd, &nd_desc->dsm_mask, BITS_PER_LONG) | |
255 | len += sprintf(buf + len, "%s ", nvdimm_bus_cmd_name(cmd)); | |
256 | len += sprintf(buf + len, "\n"); | |
257 | return len; | |
258 | } | |
259 | static DEVICE_ATTR_RO(commands); | |
260 | ||
45def22c DW |
261 | static const char *nvdimm_bus_provider(struct nvdimm_bus *nvdimm_bus) |
262 | { | |
263 | struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; | |
264 | struct device *parent = nvdimm_bus->dev.parent; | |
265 | ||
266 | if (nd_desc->provider_name) | |
267 | return nd_desc->provider_name; | |
268 | else if (parent) | |
269 | return dev_name(parent); | |
270 | else | |
271 | return "unknown"; | |
272 | } | |
273 | ||
274 | static ssize_t provider_show(struct device *dev, | |
275 | struct device_attribute *attr, char *buf) | |
276 | { | |
277 | struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); | |
278 | ||
279 | return sprintf(buf, "%s\n", nvdimm_bus_provider(nvdimm_bus)); | |
280 | } | |
281 | static DEVICE_ATTR_RO(provider); | |
282 | ||
4d88a97a DW |
283 | static int flush_namespaces(struct device *dev, void *data) |
284 | { | |
285 | device_lock(dev); | |
286 | device_unlock(dev); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int flush_regions_dimms(struct device *dev, void *data) | |
291 | { | |
292 | device_lock(dev); | |
293 | device_unlock(dev); | |
294 | device_for_each_child(dev, NULL, flush_namespaces); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | static ssize_t wait_probe_show(struct device *dev, | |
299 | struct device_attribute *attr, char *buf) | |
300 | { | |
301 | nd_synchronize(); | |
302 | device_for_each_child(dev, NULL, flush_regions_dimms); | |
303 | return sprintf(buf, "1\n"); | |
304 | } | |
305 | static DEVICE_ATTR_RO(wait_probe); | |
306 | ||
45def22c | 307 | static struct attribute *nvdimm_bus_attributes[] = { |
62232e45 | 308 | &dev_attr_commands.attr, |
4d88a97a | 309 | &dev_attr_wait_probe.attr, |
45def22c DW |
310 | &dev_attr_provider.attr, |
311 | NULL, | |
312 | }; | |
313 | ||
314 | struct attribute_group nvdimm_bus_attribute_group = { | |
315 | .attrs = nvdimm_bus_attributes, | |
316 | }; | |
317 | EXPORT_SYMBOL_GPL(nvdimm_bus_attribute_group); | |
318 | ||
3d88002e DW |
319 | struct nvdimm_bus *__nvdimm_bus_register(struct device *parent, |
320 | struct nvdimm_bus_descriptor *nd_desc, struct module *module) | |
b94d5230 DW |
321 | { |
322 | struct nvdimm_bus *nvdimm_bus; | |
323 | int rc; | |
324 | ||
325 | nvdimm_bus = kzalloc(sizeof(*nvdimm_bus), GFP_KERNEL); | |
326 | if (!nvdimm_bus) | |
327 | return NULL; | |
45def22c | 328 | INIT_LIST_HEAD(&nvdimm_bus->list); |
0caeef63 | 329 | INIT_LIST_HEAD(&nvdimm_bus->poison_list); |
eaf96153 | 330 | init_waitqueue_head(&nvdimm_bus->probe_wait); |
b94d5230 | 331 | nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL); |
3d88002e | 332 | mutex_init(&nvdimm_bus->reconfig_mutex); |
b94d5230 DW |
333 | if (nvdimm_bus->id < 0) { |
334 | kfree(nvdimm_bus); | |
335 | return NULL; | |
336 | } | |
337 | nvdimm_bus->nd_desc = nd_desc; | |
3d88002e | 338 | nvdimm_bus->module = module; |
b94d5230 DW |
339 | nvdimm_bus->dev.parent = parent; |
340 | nvdimm_bus->dev.release = nvdimm_bus_release; | |
45def22c | 341 | nvdimm_bus->dev.groups = nd_desc->attr_groups; |
b94d5230 DW |
342 | dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id); |
343 | rc = device_register(&nvdimm_bus->dev); | |
344 | if (rc) { | |
345 | dev_dbg(&nvdimm_bus->dev, "registration failed: %d\n", rc); | |
45def22c | 346 | goto err; |
b94d5230 DW |
347 | } |
348 | ||
45def22c DW |
349 | rc = nvdimm_bus_create_ndctl(nvdimm_bus); |
350 | if (rc) | |
351 | goto err; | |
352 | ||
353 | mutex_lock(&nvdimm_bus_list_mutex); | |
354 | list_add_tail(&nvdimm_bus->list, &nvdimm_bus_list); | |
355 | mutex_unlock(&nvdimm_bus_list_mutex); | |
356 | ||
b94d5230 | 357 | return nvdimm_bus; |
45def22c DW |
358 | err: |
359 | put_device(&nvdimm_bus->dev); | |
360 | return NULL; | |
b94d5230 | 361 | } |
3d88002e | 362 | EXPORT_SYMBOL_GPL(__nvdimm_bus_register); |
b94d5230 | 363 | |
b95f5f43 | 364 | static void set_badblock(struct badblocks *bb, sector_t s, int num) |
87ba05df | 365 | { |
b95f5f43 | 366 | dev_dbg(bb->dev, "Found a poison range (0x%llx, 0x%llx)\n", |
87ba05df DW |
367 | (u64) s * 512, (u64) num * 512); |
368 | /* this isn't an error as the hardware will still throw an exception */ | |
b95f5f43 DW |
369 | if (badblocks_set(bb, s, num, 1)) |
370 | dev_info_once(bb->dev, "%s: failed for sector %llx\n", | |
87ba05df DW |
371 | __func__, (u64) s); |
372 | } | |
373 | ||
0caeef63 VV |
374 | /** |
375 | * __add_badblock_range() - Convert a physical address range to bad sectors | |
b95f5f43 | 376 | * @bb: badblocks instance to populate |
0caeef63 VV |
377 | * @ns_offset: namespace offset where the error range begins (in bytes) |
378 | * @len: number of bytes of poison to be added | |
379 | * | |
380 | * This assumes that the range provided with (ns_offset, len) is within | |
381 | * the bounds of physical addresses for this namespace, i.e. lies in the | |
382 | * interval [ns_start, ns_start + ns_size) | |
383 | */ | |
b95f5f43 | 384 | static void __add_badblock_range(struct badblocks *bb, u64 ns_offset, u64 len) |
0caeef63 | 385 | { |
b95f5f43 | 386 | const unsigned int sector_size = 512; |
0caeef63 VV |
387 | sector_t start_sector; |
388 | u64 num_sectors; | |
389 | u32 rem; | |
0caeef63 VV |
390 | |
391 | start_sector = div_u64(ns_offset, sector_size); | |
392 | num_sectors = div_u64_rem(len, sector_size, &rem); | |
393 | if (rem) | |
394 | num_sectors++; | |
395 | ||
0caeef63 VV |
396 | if (unlikely(num_sectors > (u64)INT_MAX)) { |
397 | u64 remaining = num_sectors; | |
398 | sector_t s = start_sector; | |
399 | ||
400 | while (remaining) { | |
401 | int done = min_t(u64, remaining, INT_MAX); | |
402 | ||
b95f5f43 | 403 | set_badblock(bb, s, done); |
0caeef63 VV |
404 | remaining -= done; |
405 | s += done; | |
406 | } | |
0caeef63 | 407 | } else |
b95f5f43 | 408 | set_badblock(bb, start_sector, num_sectors); |
0caeef63 VV |
409 | } |
410 | ||
411 | /** | |
412 | * nvdimm_namespace_add_poison() - Convert a list of poison ranges to badblocks | |
0caeef63 | 413 | * @ndns: the namespace containing poison ranges |
b95f5f43 DW |
414 | * @bb: badblocks instance to populate |
415 | * @offset: offset at the start of the namespace before 'sector 0' | |
0caeef63 VV |
416 | * |
417 | * The poison list generated during NFIT initialization may contain multiple, | |
418 | * possibly overlapping ranges in the SPA (System Physical Address) space. | |
419 | * Compare each of these ranges to the namespace currently being initialized, | |
420 | * and add badblocks to the gendisk for all matching sub-ranges | |
0caeef63 | 421 | */ |
b95f5f43 DW |
422 | void nvdimm_namespace_add_poison(struct nd_namespace_common *ndns, |
423 | struct badblocks *bb, resource_size_t offset) | |
0caeef63 VV |
424 | { |
425 | struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev); | |
426 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
427 | struct nvdimm_bus *nvdimm_bus; | |
428 | struct list_head *poison_list; | |
429 | u64 ns_start, ns_end, ns_size; | |
430 | struct nd_poison *pl; | |
0caeef63 VV |
431 | |
432 | ns_size = nvdimm_namespace_capacity(ndns) - offset; | |
433 | ns_start = nsio->res.start + offset; | |
434 | ns_end = nsio->res.end; | |
435 | ||
436 | nvdimm_bus = to_nvdimm_bus(nd_region->dev.parent); | |
437 | poison_list = &nvdimm_bus->poison_list; | |
438 | if (list_empty(poison_list)) | |
b95f5f43 | 439 | return; |
0caeef63 VV |
440 | |
441 | list_for_each_entry(pl, poison_list, list) { | |
442 | u64 pl_end = pl->start + pl->length - 1; | |
443 | ||
444 | /* Discard intervals with no intersection */ | |
445 | if (pl_end < ns_start) | |
446 | continue; | |
447 | if (pl->start > ns_end) | |
448 | continue; | |
449 | /* Deal with any overlap after start of the namespace */ | |
450 | if (pl->start >= ns_start) { | |
451 | u64 start = pl->start; | |
452 | u64 len; | |
453 | ||
454 | if (pl_end <= ns_end) | |
455 | len = pl->length; | |
456 | else | |
457 | len = ns_start + ns_size - pl->start; | |
b95f5f43 | 458 | __add_badblock_range(bb, start - ns_start, len); |
0caeef63 VV |
459 | continue; |
460 | } | |
461 | /* Deal with overlap for poison starting before the namespace */ | |
462 | if (pl->start < ns_start) { | |
463 | u64 len; | |
464 | ||
465 | if (pl_end < ns_end) | |
466 | len = pl->start + pl->length - ns_start; | |
467 | else | |
468 | len = ns_size; | |
b95f5f43 | 469 | __add_badblock_range(bb, 0, len); |
0caeef63 VV |
470 | } |
471 | } | |
0caeef63 VV |
472 | } |
473 | EXPORT_SYMBOL_GPL(nvdimm_namespace_add_poison); | |
474 | ||
475 | static int __add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length) | |
476 | { | |
477 | struct nd_poison *pl; | |
478 | ||
479 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); | |
480 | if (!pl) | |
481 | return -ENOMEM; | |
482 | ||
483 | pl->start = addr; | |
484 | pl->length = length; | |
485 | list_add_tail(&pl->list, &nvdimm_bus->poison_list); | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length) | |
491 | { | |
492 | struct nd_poison *pl; | |
493 | ||
494 | if (list_empty(&nvdimm_bus->poison_list)) | |
495 | return __add_poison(nvdimm_bus, addr, length); | |
496 | ||
497 | /* | |
498 | * There is a chance this is a duplicate, check for those first. | |
499 | * This will be the common case as ARS_STATUS returns all known | |
500 | * errors in the SPA space, and we can't query it per region | |
501 | */ | |
502 | list_for_each_entry(pl, &nvdimm_bus->poison_list, list) | |
503 | if (pl->start == addr) { | |
504 | /* If length has changed, update this list entry */ | |
505 | if (pl->length != length) | |
506 | pl->length = length; | |
507 | return 0; | |
508 | } | |
509 | ||
510 | /* | |
511 | * If not a duplicate or a simple length update, add the entry as is, | |
512 | * as any overlapping ranges will get resolved when the list is consumed | |
513 | * and converted to badblocks | |
514 | */ | |
515 | return __add_poison(nvdimm_bus, addr, length); | |
516 | } | |
517 | EXPORT_SYMBOL_GPL(nvdimm_bus_add_poison); | |
518 | ||
519 | static void free_poison_list(struct list_head *poison_list) | |
520 | { | |
521 | struct nd_poison *pl, *next; | |
522 | ||
523 | list_for_each_entry_safe(pl, next, poison_list, list) { | |
524 | list_del(&pl->list); | |
525 | kfree(pl); | |
526 | } | |
527 | list_del_init(poison_list); | |
528 | } | |
529 | ||
e6dfb2de DW |
530 | static int child_unregister(struct device *dev, void *data) |
531 | { | |
532 | /* | |
533 | * the singular ndctl class device per bus needs to be | |
534 | * "device_destroy"ed, so skip it here | |
535 | * | |
536 | * i.e. remove classless children | |
537 | */ | |
538 | if (dev->class) | |
539 | /* pass */; | |
540 | else | |
4d88a97a | 541 | nd_device_unregister(dev, ND_SYNC); |
e6dfb2de DW |
542 | return 0; |
543 | } | |
544 | ||
b94d5230 DW |
545 | void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus) |
546 | { | |
547 | if (!nvdimm_bus) | |
548 | return; | |
45def22c DW |
549 | |
550 | mutex_lock(&nvdimm_bus_list_mutex); | |
551 | list_del_init(&nvdimm_bus->list); | |
552 | mutex_unlock(&nvdimm_bus_list_mutex); | |
553 | ||
4d88a97a | 554 | nd_synchronize(); |
e6dfb2de | 555 | device_for_each_child(&nvdimm_bus->dev, NULL, child_unregister); |
0caeef63 | 556 | free_poison_list(&nvdimm_bus->poison_list); |
45def22c DW |
557 | nvdimm_bus_destroy_ndctl(nvdimm_bus); |
558 | ||
b94d5230 DW |
559 | device_unregister(&nvdimm_bus->dev); |
560 | } | |
561 | EXPORT_SYMBOL_GPL(nvdimm_bus_unregister); | |
562 | ||
41cd8b70 | 563 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
41cd8b70 VV |
564 | int nd_integrity_init(struct gendisk *disk, unsigned long meta_size) |
565 | { | |
0f8087ec | 566 | struct blk_integrity bi; |
41cd8b70 | 567 | |
fcae6957 VV |
568 | if (meta_size == 0) |
569 | return 0; | |
570 | ||
4125a09b | 571 | bi.profile = NULL; |
0f8087ec MP |
572 | bi.tuple_size = meta_size; |
573 | bi.tag_size = meta_size; | |
574 | ||
25520d55 | 575 | blk_integrity_register(disk, &bi); |
41cd8b70 VV |
576 | blk_queue_max_integrity_segments(disk->queue, 1); |
577 | ||
578 | return 0; | |
579 | } | |
580 | EXPORT_SYMBOL(nd_integrity_init); | |
581 | ||
582 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
583 | int nd_integrity_init(struct gendisk *disk, unsigned long meta_size) | |
584 | { | |
585 | return 0; | |
586 | } | |
587 | EXPORT_SYMBOL(nd_integrity_init); | |
588 | ||
589 | #endif | |
590 | ||
45def22c DW |
591 | static __init int libnvdimm_init(void) |
592 | { | |
4d88a97a DW |
593 | int rc; |
594 | ||
595 | rc = nvdimm_bus_init(); | |
596 | if (rc) | |
597 | return rc; | |
598 | rc = nvdimm_init(); | |
599 | if (rc) | |
600 | goto err_dimm; | |
3d88002e DW |
601 | rc = nd_region_init(); |
602 | if (rc) | |
603 | goto err_region; | |
4d88a97a | 604 | return 0; |
3d88002e DW |
605 | err_region: |
606 | nvdimm_exit(); | |
4d88a97a DW |
607 | err_dimm: |
608 | nvdimm_bus_exit(); | |
609 | return rc; | |
45def22c DW |
610 | } |
611 | ||
612 | static __exit void libnvdimm_exit(void) | |
613 | { | |
614 | WARN_ON(!list_empty(&nvdimm_bus_list)); | |
3d88002e | 615 | nd_region_exit(); |
4d88a97a | 616 | nvdimm_exit(); |
45def22c DW |
617 | nvdimm_bus_exit(); |
618 | } | |
619 | ||
b94d5230 DW |
620 | MODULE_LICENSE("GPL v2"); |
621 | MODULE_AUTHOR("Intel Corporation"); | |
45def22c DW |
622 | subsys_initcall(libnvdimm_init); |
623 | module_exit(libnvdimm_exit); |