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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 | { | |
7ae0fa43 DW |
301 | struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); |
302 | struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; | |
303 | int rc; | |
304 | ||
305 | if (nd_desc->flush_probe) { | |
306 | rc = nd_desc->flush_probe(nd_desc); | |
307 | if (rc) | |
308 | return rc; | |
309 | } | |
4d88a97a DW |
310 | nd_synchronize(); |
311 | device_for_each_child(dev, NULL, flush_regions_dimms); | |
312 | return sprintf(buf, "1\n"); | |
313 | } | |
314 | static DEVICE_ATTR_RO(wait_probe); | |
315 | ||
45def22c | 316 | static struct attribute *nvdimm_bus_attributes[] = { |
62232e45 | 317 | &dev_attr_commands.attr, |
4d88a97a | 318 | &dev_attr_wait_probe.attr, |
45def22c DW |
319 | &dev_attr_provider.attr, |
320 | NULL, | |
321 | }; | |
322 | ||
323 | struct attribute_group nvdimm_bus_attribute_group = { | |
324 | .attrs = nvdimm_bus_attributes, | |
325 | }; | |
326 | EXPORT_SYMBOL_GPL(nvdimm_bus_attribute_group); | |
327 | ||
3d88002e DW |
328 | struct nvdimm_bus *__nvdimm_bus_register(struct device *parent, |
329 | struct nvdimm_bus_descriptor *nd_desc, struct module *module) | |
b94d5230 DW |
330 | { |
331 | struct nvdimm_bus *nvdimm_bus; | |
332 | int rc; | |
333 | ||
334 | nvdimm_bus = kzalloc(sizeof(*nvdimm_bus), GFP_KERNEL); | |
335 | if (!nvdimm_bus) | |
336 | return NULL; | |
45def22c | 337 | INIT_LIST_HEAD(&nvdimm_bus->list); |
0caeef63 | 338 | INIT_LIST_HEAD(&nvdimm_bus->poison_list); |
eaf96153 | 339 | init_waitqueue_head(&nvdimm_bus->probe_wait); |
b94d5230 | 340 | nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL); |
3d88002e | 341 | mutex_init(&nvdimm_bus->reconfig_mutex); |
b94d5230 DW |
342 | if (nvdimm_bus->id < 0) { |
343 | kfree(nvdimm_bus); | |
344 | return NULL; | |
345 | } | |
346 | nvdimm_bus->nd_desc = nd_desc; | |
3d88002e | 347 | nvdimm_bus->module = module; |
b94d5230 DW |
348 | nvdimm_bus->dev.parent = parent; |
349 | nvdimm_bus->dev.release = nvdimm_bus_release; | |
45def22c | 350 | nvdimm_bus->dev.groups = nd_desc->attr_groups; |
b94d5230 DW |
351 | dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id); |
352 | rc = device_register(&nvdimm_bus->dev); | |
353 | if (rc) { | |
354 | dev_dbg(&nvdimm_bus->dev, "registration failed: %d\n", rc); | |
45def22c | 355 | goto err; |
b94d5230 DW |
356 | } |
357 | ||
45def22c DW |
358 | rc = nvdimm_bus_create_ndctl(nvdimm_bus); |
359 | if (rc) | |
360 | goto err; | |
361 | ||
362 | mutex_lock(&nvdimm_bus_list_mutex); | |
363 | list_add_tail(&nvdimm_bus->list, &nvdimm_bus_list); | |
364 | mutex_unlock(&nvdimm_bus_list_mutex); | |
365 | ||
b94d5230 | 366 | return nvdimm_bus; |
45def22c DW |
367 | err: |
368 | put_device(&nvdimm_bus->dev); | |
369 | return NULL; | |
b94d5230 | 370 | } |
3d88002e | 371 | EXPORT_SYMBOL_GPL(__nvdimm_bus_register); |
b94d5230 | 372 | |
b95f5f43 | 373 | static void set_badblock(struct badblocks *bb, sector_t s, int num) |
87ba05df | 374 | { |
b95f5f43 | 375 | dev_dbg(bb->dev, "Found a poison range (0x%llx, 0x%llx)\n", |
87ba05df DW |
376 | (u64) s * 512, (u64) num * 512); |
377 | /* this isn't an error as the hardware will still throw an exception */ | |
b95f5f43 DW |
378 | if (badblocks_set(bb, s, num, 1)) |
379 | dev_info_once(bb->dev, "%s: failed for sector %llx\n", | |
87ba05df DW |
380 | __func__, (u64) s); |
381 | } | |
382 | ||
0caeef63 VV |
383 | /** |
384 | * __add_badblock_range() - Convert a physical address range to bad sectors | |
b95f5f43 | 385 | * @bb: badblocks instance to populate |
0caeef63 VV |
386 | * @ns_offset: namespace offset where the error range begins (in bytes) |
387 | * @len: number of bytes of poison to be added | |
388 | * | |
389 | * This assumes that the range provided with (ns_offset, len) is within | |
390 | * the bounds of physical addresses for this namespace, i.e. lies in the | |
391 | * interval [ns_start, ns_start + ns_size) | |
392 | */ | |
b95f5f43 | 393 | static void __add_badblock_range(struct badblocks *bb, u64 ns_offset, u64 len) |
0caeef63 | 394 | { |
b95f5f43 | 395 | const unsigned int sector_size = 512; |
0caeef63 VV |
396 | sector_t start_sector; |
397 | u64 num_sectors; | |
398 | u32 rem; | |
0caeef63 VV |
399 | |
400 | start_sector = div_u64(ns_offset, sector_size); | |
401 | num_sectors = div_u64_rem(len, sector_size, &rem); | |
402 | if (rem) | |
403 | num_sectors++; | |
404 | ||
0caeef63 VV |
405 | if (unlikely(num_sectors > (u64)INT_MAX)) { |
406 | u64 remaining = num_sectors; | |
407 | sector_t s = start_sector; | |
408 | ||
409 | while (remaining) { | |
410 | int done = min_t(u64, remaining, INT_MAX); | |
411 | ||
b95f5f43 | 412 | set_badblock(bb, s, done); |
0caeef63 VV |
413 | remaining -= done; |
414 | s += done; | |
415 | } | |
0caeef63 | 416 | } else |
b95f5f43 | 417 | set_badblock(bb, start_sector, num_sectors); |
0caeef63 VV |
418 | } |
419 | ||
a3901802 DW |
420 | static void badblocks_populate(struct list_head *poison_list, |
421 | struct badblocks *bb, const struct resource *res) | |
0caeef63 | 422 | { |
0caeef63 | 423 | struct nd_poison *pl; |
0caeef63 | 424 | |
0caeef63 | 425 | if (list_empty(poison_list)) |
b95f5f43 | 426 | return; |
0caeef63 VV |
427 | |
428 | list_for_each_entry(pl, poison_list, list) { | |
429 | u64 pl_end = pl->start + pl->length - 1; | |
430 | ||
431 | /* Discard intervals with no intersection */ | |
5faecf4e | 432 | if (pl_end < res->start) |
0caeef63 | 433 | continue; |
5faecf4e | 434 | if (pl->start > res->end) |
0caeef63 VV |
435 | continue; |
436 | /* Deal with any overlap after start of the namespace */ | |
5faecf4e | 437 | if (pl->start >= res->start) { |
0caeef63 VV |
438 | u64 start = pl->start; |
439 | u64 len; | |
440 | ||
5faecf4e | 441 | if (pl_end <= res->end) |
0caeef63 VV |
442 | len = pl->length; |
443 | else | |
5faecf4e DW |
444 | len = res->start + resource_size(res) |
445 | - pl->start; | |
446 | __add_badblock_range(bb, start - res->start, len); | |
0caeef63 VV |
447 | continue; |
448 | } | |
449 | /* Deal with overlap for poison starting before the namespace */ | |
5faecf4e | 450 | if (pl->start < res->start) { |
0caeef63 VV |
451 | u64 len; |
452 | ||
5faecf4e DW |
453 | if (pl_end < res->end) |
454 | len = pl->start + pl->length - res->start; | |
0caeef63 | 455 | else |
5faecf4e | 456 | len = resource_size(res); |
b95f5f43 | 457 | __add_badblock_range(bb, 0, len); |
0caeef63 VV |
458 | } |
459 | } | |
0caeef63 | 460 | } |
5faecf4e DW |
461 | |
462 | /** | |
a3901802 DW |
463 | * nvdimm_badblocks_populate() - Convert a list of poison ranges to badblocks |
464 | * @region: parent region of the range to interrogate | |
465 | * @bb: badblocks instance to populate | |
466 | * @res: resource range to consider | |
5faecf4e | 467 | * |
a3901802 DW |
468 | * The poison list generated during bus initialization may contain |
469 | * multiple, possibly overlapping physical address ranges. Compare each | |
470 | * of these ranges to the resource range currently being initialized, | |
471 | * and add badblocks entries for all matching sub-ranges | |
5faecf4e | 472 | */ |
a3901802 DW |
473 | void nvdimm_badblocks_populate(struct nd_region *nd_region, |
474 | struct badblocks *bb, const struct resource *res) | |
5faecf4e | 475 | { |
5faecf4e DW |
476 | struct nvdimm_bus *nvdimm_bus; |
477 | struct list_head *poison_list; | |
5faecf4e | 478 | |
a3901802 DW |
479 | if (!is_nd_pmem(&nd_region->dev)) { |
480 | dev_WARN_ONCE(&nd_region->dev, 1, | |
481 | "%s only valid for pmem regions\n", __func__); | |
482 | return; | |
483 | } | |
484 | nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); | |
5faecf4e DW |
485 | poison_list = &nvdimm_bus->poison_list; |
486 | ||
487 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
a3901802 | 488 | badblocks_populate(poison_list, bb, res); |
5faecf4e DW |
489 | nvdimm_bus_unlock(&nvdimm_bus->dev); |
490 | } | |
a3901802 | 491 | EXPORT_SYMBOL_GPL(nvdimm_badblocks_populate); |
0caeef63 | 492 | |
5faecf4e | 493 | static int add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length) |
0caeef63 VV |
494 | { |
495 | struct nd_poison *pl; | |
496 | ||
497 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); | |
498 | if (!pl) | |
499 | return -ENOMEM; | |
500 | ||
501 | pl->start = addr; | |
502 | pl->length = length; | |
503 | list_add_tail(&pl->list, &nvdimm_bus->poison_list); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
5faecf4e | 508 | static int bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length) |
0caeef63 VV |
509 | { |
510 | struct nd_poison *pl; | |
511 | ||
512 | if (list_empty(&nvdimm_bus->poison_list)) | |
5faecf4e | 513 | return add_poison(nvdimm_bus, addr, length); |
0caeef63 VV |
514 | |
515 | /* | |
516 | * There is a chance this is a duplicate, check for those first. | |
517 | * This will be the common case as ARS_STATUS returns all known | |
518 | * errors in the SPA space, and we can't query it per region | |
519 | */ | |
520 | list_for_each_entry(pl, &nvdimm_bus->poison_list, list) | |
521 | if (pl->start == addr) { | |
522 | /* If length has changed, update this list entry */ | |
523 | if (pl->length != length) | |
524 | pl->length = length; | |
525 | return 0; | |
526 | } | |
527 | ||
528 | /* | |
529 | * If not a duplicate or a simple length update, add the entry as is, | |
530 | * as any overlapping ranges will get resolved when the list is consumed | |
531 | * and converted to badblocks | |
532 | */ | |
5faecf4e DW |
533 | return add_poison(nvdimm_bus, addr, length); |
534 | } | |
535 | ||
536 | int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length) | |
537 | { | |
538 | int rc; | |
539 | ||
540 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
541 | rc = bus_add_poison(nvdimm_bus, addr, length); | |
542 | nvdimm_bus_unlock(&nvdimm_bus->dev); | |
543 | ||
544 | return rc; | |
0caeef63 VV |
545 | } |
546 | EXPORT_SYMBOL_GPL(nvdimm_bus_add_poison); | |
547 | ||
548 | static void free_poison_list(struct list_head *poison_list) | |
549 | { | |
550 | struct nd_poison *pl, *next; | |
551 | ||
552 | list_for_each_entry_safe(pl, next, poison_list, list) { | |
553 | list_del(&pl->list); | |
554 | kfree(pl); | |
555 | } | |
556 | list_del_init(poison_list); | |
557 | } | |
558 | ||
e6dfb2de DW |
559 | static int child_unregister(struct device *dev, void *data) |
560 | { | |
561 | /* | |
562 | * the singular ndctl class device per bus needs to be | |
563 | * "device_destroy"ed, so skip it here | |
564 | * | |
565 | * i.e. remove classless children | |
566 | */ | |
567 | if (dev->class) | |
568 | /* pass */; | |
569 | else | |
4d88a97a | 570 | nd_device_unregister(dev, ND_SYNC); |
e6dfb2de DW |
571 | return 0; |
572 | } | |
573 | ||
b94d5230 DW |
574 | void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus) |
575 | { | |
576 | if (!nvdimm_bus) | |
577 | return; | |
45def22c DW |
578 | |
579 | mutex_lock(&nvdimm_bus_list_mutex); | |
580 | list_del_init(&nvdimm_bus->list); | |
581 | mutex_unlock(&nvdimm_bus_list_mutex); | |
582 | ||
4d88a97a | 583 | nd_synchronize(); |
e6dfb2de | 584 | device_for_each_child(&nvdimm_bus->dev, NULL, child_unregister); |
5faecf4e DW |
585 | |
586 | nvdimm_bus_lock(&nvdimm_bus->dev); | |
0caeef63 | 587 | free_poison_list(&nvdimm_bus->poison_list); |
5faecf4e DW |
588 | nvdimm_bus_unlock(&nvdimm_bus->dev); |
589 | ||
45def22c DW |
590 | nvdimm_bus_destroy_ndctl(nvdimm_bus); |
591 | ||
b94d5230 DW |
592 | device_unregister(&nvdimm_bus->dev); |
593 | } | |
594 | EXPORT_SYMBOL_GPL(nvdimm_bus_unregister); | |
595 | ||
41cd8b70 | 596 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
41cd8b70 VV |
597 | int nd_integrity_init(struct gendisk *disk, unsigned long meta_size) |
598 | { | |
0f8087ec | 599 | struct blk_integrity bi; |
41cd8b70 | 600 | |
fcae6957 VV |
601 | if (meta_size == 0) |
602 | return 0; | |
603 | ||
4125a09b | 604 | bi.profile = NULL; |
0f8087ec MP |
605 | bi.tuple_size = meta_size; |
606 | bi.tag_size = meta_size; | |
607 | ||
25520d55 | 608 | blk_integrity_register(disk, &bi); |
41cd8b70 VV |
609 | blk_queue_max_integrity_segments(disk->queue, 1); |
610 | ||
611 | return 0; | |
612 | } | |
613 | EXPORT_SYMBOL(nd_integrity_init); | |
614 | ||
615 | #else /* CONFIG_BLK_DEV_INTEGRITY */ | |
616 | int nd_integrity_init(struct gendisk *disk, unsigned long meta_size) | |
617 | { | |
618 | return 0; | |
619 | } | |
620 | EXPORT_SYMBOL(nd_integrity_init); | |
621 | ||
622 | #endif | |
623 | ||
45def22c DW |
624 | static __init int libnvdimm_init(void) |
625 | { | |
4d88a97a DW |
626 | int rc; |
627 | ||
628 | rc = nvdimm_bus_init(); | |
629 | if (rc) | |
630 | return rc; | |
631 | rc = nvdimm_init(); | |
632 | if (rc) | |
633 | goto err_dimm; | |
3d88002e DW |
634 | rc = nd_region_init(); |
635 | if (rc) | |
636 | goto err_region; | |
4d88a97a | 637 | return 0; |
3d88002e DW |
638 | err_region: |
639 | nvdimm_exit(); | |
4d88a97a DW |
640 | err_dimm: |
641 | nvdimm_bus_exit(); | |
642 | return rc; | |
45def22c DW |
643 | } |
644 | ||
645 | static __exit void libnvdimm_exit(void) | |
646 | { | |
647 | WARN_ON(!list_empty(&nvdimm_bus_list)); | |
3d88002e | 648 | nd_region_exit(); |
4d88a97a | 649 | nvdimm_exit(); |
45def22c | 650 | nvdimm_bus_exit(); |
b354aba0 DW |
651 | nd_region_devs_exit(); |
652 | nvdimm_devs_exit(); | |
653 | ida_destroy(&nd_ida); | |
45def22c DW |
654 | } |
655 | ||
b94d5230 DW |
656 | MODULE_LICENSE("GPL v2"); |
657 | MODULE_AUTHOR("Intel Corporation"); | |
45def22c DW |
658 | subsys_initcall(libnvdimm_init); |
659 | module_exit(libnvdimm_exit); |