Commit | Line | Data |
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3d88002e 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/module.h> | |
14 | #include <linux/device.h> | |
6ff3e912 | 15 | #include <linux/sort.h> |
3d88002e | 16 | #include <linux/slab.h> |
ae8219f1 | 17 | #include <linux/list.h> |
3d88002e | 18 | #include <linux/nd.h> |
bf9bccc1 | 19 | #include "nd-core.h" |
ca6a4657 | 20 | #include "pmem.h" |
3d88002e DW |
21 | #include "nd.h" |
22 | ||
23 | static void namespace_io_release(struct device *dev) | |
24 | { | |
25 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
26 | ||
27 | kfree(nsio); | |
28 | } | |
29 | ||
bf9bccc1 DW |
30 | static void namespace_pmem_release(struct device *dev) |
31 | { | |
32 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0e3b0d12 | 33 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 | 34 | |
0e3b0d12 DW |
35 | if (nspm->id >= 0) |
36 | ida_simple_remove(&nd_region->ns_ida, nspm->id); | |
bf9bccc1 DW |
37 | kfree(nspm->alt_name); |
38 | kfree(nspm->uuid); | |
39 | kfree(nspm); | |
40 | } | |
41 | ||
42 | static void namespace_blk_release(struct device *dev) | |
43 | { | |
1b40e09a DW |
44 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
45 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
46 | ||
47 | if (nsblk->id >= 0) | |
48 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); | |
49 | kfree(nsblk->alt_name); | |
50 | kfree(nsblk->uuid); | |
51 | kfree(nsblk->res); | |
52 | kfree(nsblk); | |
bf9bccc1 DW |
53 | } |
54 | ||
970d14e3 | 55 | static const struct device_type namespace_io_device_type = { |
3d88002e DW |
56 | .name = "nd_namespace_io", |
57 | .release = namespace_io_release, | |
58 | }; | |
59 | ||
970d14e3 | 60 | static const struct device_type namespace_pmem_device_type = { |
bf9bccc1 DW |
61 | .name = "nd_namespace_pmem", |
62 | .release = namespace_pmem_release, | |
63 | }; | |
64 | ||
970d14e3 | 65 | static const struct device_type namespace_blk_device_type = { |
bf9bccc1 DW |
66 | .name = "nd_namespace_blk", |
67 | .release = namespace_blk_release, | |
68 | }; | |
69 | ||
6ff3e912 | 70 | static bool is_namespace_pmem(const struct device *dev) |
bf9bccc1 DW |
71 | { |
72 | return dev ? dev->type == &namespace_pmem_device_type : false; | |
73 | } | |
74 | ||
6ff3e912 | 75 | static bool is_namespace_blk(const struct device *dev) |
bf9bccc1 DW |
76 | { |
77 | return dev ? dev->type == &namespace_blk_device_type : false; | |
78 | } | |
79 | ||
6ff3e912 | 80 | static bool is_namespace_io(const struct device *dev) |
bf9bccc1 DW |
81 | { |
82 | return dev ? dev->type == &namespace_io_device_type : false; | |
83 | } | |
84 | ||
e07ecd76 DW |
85 | static int is_uuid_busy(struct device *dev, void *data) |
86 | { | |
87 | u8 *uuid1 = data, *uuid2 = NULL; | |
88 | ||
89 | if (is_namespace_pmem(dev)) { | |
90 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
91 | ||
92 | uuid2 = nspm->uuid; | |
93 | } else if (is_namespace_blk(dev)) { | |
94 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
95 | ||
96 | uuid2 = nsblk->uuid; | |
97 | } else if (is_nd_btt(dev)) { | |
98 | struct nd_btt *nd_btt = to_nd_btt(dev); | |
99 | ||
100 | uuid2 = nd_btt->uuid; | |
101 | } else if (is_nd_pfn(dev)) { | |
102 | struct nd_pfn *nd_pfn = to_nd_pfn(dev); | |
103 | ||
104 | uuid2 = nd_pfn->uuid; | |
105 | } | |
106 | ||
107 | if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0) | |
108 | return -EBUSY; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int is_namespace_uuid_busy(struct device *dev, void *data) | |
114 | { | |
c9e582aa | 115 | if (is_nd_region(dev)) |
e07ecd76 DW |
116 | return device_for_each_child(dev, data, is_uuid_busy); |
117 | return 0; | |
118 | } | |
119 | ||
120 | /** | |
121 | * nd_is_uuid_unique - verify that no other namespace has @uuid | |
122 | * @dev: any device on a nvdimm_bus | |
123 | * @uuid: uuid to check | |
124 | */ | |
125 | bool nd_is_uuid_unique(struct device *dev, u8 *uuid) | |
126 | { | |
127 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
128 | ||
129 | if (!nvdimm_bus) | |
130 | return false; | |
131 | WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev)); | |
132 | if (device_for_each_child(&nvdimm_bus->dev, uuid, | |
133 | is_namespace_uuid_busy) != 0) | |
134 | return false; | |
135 | return true; | |
136 | } | |
137 | ||
004f1afb DW |
138 | bool pmem_should_map_pages(struct device *dev) |
139 | { | |
140 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
fa7d2e63 | 141 | struct nd_namespace_common *ndns = to_ndns(dev); |
cfe30b87 | 142 | struct nd_namespace_io *nsio; |
004f1afb DW |
143 | |
144 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) | |
145 | return false; | |
146 | ||
147 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) | |
148 | return false; | |
149 | ||
150 | if (is_nd_pfn(dev) || is_nd_btt(dev)) | |
151 | return false; | |
152 | ||
fa7d2e63 DW |
153 | if (ndns->force_raw) |
154 | return false; | |
155 | ||
cfe30b87 DW |
156 | nsio = to_nd_namespace_io(dev); |
157 | if (region_intersects(nsio->res.start, resource_size(&nsio->res), | |
158 | IORESOURCE_SYSTEM_RAM, | |
159 | IORES_DESC_NONE) == REGION_MIXED) | |
160 | return false; | |
161 | ||
004f1afb | 162 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; |
004f1afb DW |
163 | } |
164 | EXPORT_SYMBOL(pmem_should_map_pages); | |
165 | ||
f979b13c DW |
166 | unsigned int pmem_sector_size(struct nd_namespace_common *ndns) |
167 | { | |
168 | if (is_namespace_pmem(&ndns->dev)) { | |
169 | struct nd_namespace_pmem *nspm; | |
170 | ||
171 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
172 | if (nspm->lbasize == 0 || nspm->lbasize == 512) | |
173 | /* default */; | |
174 | else if (nspm->lbasize == 4096) | |
175 | return 4096; | |
176 | else | |
177 | dev_WARN(&ndns->dev, "unsupported sector size: %ld\n", | |
178 | nspm->lbasize); | |
179 | } | |
180 | ||
181 | /* | |
182 | * There is no namespace label (is_namespace_io()), or the label | |
183 | * indicates the default sector size. | |
184 | */ | |
185 | return 512; | |
186 | } | |
187 | EXPORT_SYMBOL(pmem_sector_size); | |
188 | ||
5212e11f VV |
189 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
190 | char *name) | |
191 | { | |
192 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
004f1afb | 193 | const char *suffix = NULL; |
5212e11f | 194 | |
0731de0d DW |
195 | if (ndns->claim && is_nd_btt(ndns->claim)) |
196 | suffix = "s"; | |
5212e11f | 197 | |
004f1afb | 198 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
01220733 DW |
199 | int nsidx = 0; |
200 | ||
201 | if (is_namespace_pmem(&ndns->dev)) { | |
202 | struct nd_namespace_pmem *nspm; | |
203 | ||
204 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
205 | nsidx = nspm->id; | |
206 | } | |
207 | ||
208 | if (nsidx) | |
209 | sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, | |
210 | suffix ? suffix : ""); | |
211 | else | |
212 | sprintf(name, "pmem%d%s", nd_region->id, | |
213 | suffix ? suffix : ""); | |
004f1afb | 214 | } else if (is_namespace_blk(&ndns->dev)) { |
5212e11f VV |
215 | struct nd_namespace_blk *nsblk; |
216 | ||
217 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
004f1afb DW |
218 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, |
219 | suffix ? suffix : ""); | |
5212e11f VV |
220 | } else { |
221 | return NULL; | |
222 | } | |
223 | ||
224 | return name; | |
225 | } | |
226 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); | |
227 | ||
6ec68954 VV |
228 | const u8 *nd_dev_to_uuid(struct device *dev) |
229 | { | |
230 | static const u8 null_uuid[16]; | |
231 | ||
232 | if (!dev) | |
233 | return null_uuid; | |
234 | ||
235 | if (is_namespace_pmem(dev)) { | |
236 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
237 | ||
238 | return nspm->uuid; | |
239 | } else if (is_namespace_blk(dev)) { | |
240 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
241 | ||
242 | return nsblk->uuid; | |
243 | } else | |
244 | return null_uuid; | |
245 | } | |
246 | EXPORT_SYMBOL(nd_dev_to_uuid); | |
247 | ||
3d88002e DW |
248 | static ssize_t nstype_show(struct device *dev, |
249 | struct device_attribute *attr, char *buf) | |
250 | { | |
251 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
252 | ||
253 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); | |
254 | } | |
255 | static DEVICE_ATTR_RO(nstype); | |
256 | ||
bf9bccc1 DW |
257 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
258 | const size_t len) | |
259 | { | |
260 | char *input, *pos, *alt_name, **ns_altname; | |
261 | ssize_t rc; | |
262 | ||
263 | if (is_namespace_pmem(dev)) { | |
264 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
265 | ||
266 | ns_altname = &nspm->alt_name; | |
267 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
268 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
269 | ||
270 | ns_altname = &nsblk->alt_name; | |
bf9bccc1 DW |
271 | } else |
272 | return -ENXIO; | |
273 | ||
8c2f7e86 | 274 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
275 | return -EBUSY; |
276 | ||
3d9cbe37 | 277 | input = kstrndup(buf, len, GFP_KERNEL); |
bf9bccc1 DW |
278 | if (!input) |
279 | return -ENOMEM; | |
280 | ||
bf9bccc1 DW |
281 | pos = strim(input); |
282 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { | |
283 | rc = -EINVAL; | |
284 | goto out; | |
285 | } | |
286 | ||
287 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); | |
288 | if (!alt_name) { | |
289 | rc = -ENOMEM; | |
290 | goto out; | |
291 | } | |
292 | kfree(*ns_altname); | |
293 | *ns_altname = alt_name; | |
294 | sprintf(*ns_altname, "%s", pos); | |
295 | rc = len; | |
296 | ||
297 | out: | |
298 | kfree(input); | |
299 | return rc; | |
300 | } | |
301 | ||
1b40e09a DW |
302 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
303 | { | |
8c2f7e86 | 304 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
1b40e09a DW |
305 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
306 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
307 | struct nd_label_id label_id; | |
308 | resource_size_t size = 0; | |
309 | struct resource *res; | |
310 | ||
311 | if (!nsblk->uuid) | |
312 | return 0; | |
313 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
314 | for_each_dpa_resource(ndd, res) | |
315 | if (strcmp(res->name, label_id.id) == 0) | |
316 | size += resource_size(res); | |
317 | return size; | |
318 | } | |
319 | ||
047fc8a1 RZ |
320 | static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
321 | { | |
322 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); | |
323 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
324 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
325 | struct nd_label_id label_id; | |
326 | struct resource *res; | |
327 | int count, i; | |
328 | ||
329 | if (!nsblk->uuid || !nsblk->lbasize || !ndd) | |
330 | return false; | |
331 | ||
332 | count = 0; | |
333 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
334 | for_each_dpa_resource(ndd, res) { | |
335 | if (strcmp(res->name, label_id.id) != 0) | |
336 | continue; | |
337 | /* | |
ae551e9c | 338 | * Resources with unacknowledged adjustments indicate a |
047fc8a1 RZ |
339 | * failure to update labels |
340 | */ | |
341 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
342 | return false; | |
343 | count++; | |
344 | } | |
345 | ||
346 | /* These values match after a successful label update */ | |
347 | if (count != nsblk->num_resources) | |
348 | return false; | |
349 | ||
350 | for (i = 0; i < nsblk->num_resources; i++) { | |
351 | struct resource *found = NULL; | |
352 | ||
353 | for_each_dpa_resource(ndd, res) | |
354 | if (res == nsblk->res[i]) { | |
355 | found = res; | |
356 | break; | |
357 | } | |
358 | /* stale resource */ | |
359 | if (!found) | |
360 | return false; | |
361 | } | |
362 | ||
363 | return true; | |
364 | } | |
365 | ||
366 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) | |
367 | { | |
368 | resource_size_t size; | |
369 | ||
370 | nvdimm_bus_lock(&nsblk->common.dev); | |
371 | size = __nd_namespace_blk_validate(nsblk); | |
372 | nvdimm_bus_unlock(&nsblk->common.dev); | |
373 | ||
374 | return size; | |
375 | } | |
376 | EXPORT_SYMBOL(nd_namespace_blk_validate); | |
377 | ||
378 | ||
f524bf27 DW |
379 | static int nd_namespace_label_update(struct nd_region *nd_region, |
380 | struct device *dev) | |
381 | { | |
8c2f7e86 | 382 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
f524bf27 | 383 | "namespace must be idle during label update\n"); |
8c2f7e86 | 384 | if (dev->driver || to_ndns(dev)->claim) |
f524bf27 DW |
385 | return 0; |
386 | ||
387 | /* | |
388 | * Only allow label writes that will result in a valid namespace | |
389 | * or deletion of an existing namespace. | |
390 | */ | |
391 | if (is_namespace_pmem(dev)) { | |
392 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0ba1c634 | 393 | resource_size_t size = resource_size(&nspm->nsio.res); |
f524bf27 DW |
394 | |
395 | if (size == 0 && nspm->uuid) | |
396 | /* delete allocation */; | |
397 | else if (!nspm->uuid) | |
398 | return 0; | |
399 | ||
400 | return nd_pmem_namespace_label_update(nd_region, nspm, size); | |
401 | } else if (is_namespace_blk(dev)) { | |
0ba1c634 DW |
402 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
403 | resource_size_t size = nd_namespace_blk_size(nsblk); | |
404 | ||
405 | if (size == 0 && nsblk->uuid) | |
406 | /* delete allocation */; | |
407 | else if (!nsblk->uuid || !nsblk->lbasize) | |
408 | return 0; | |
409 | ||
410 | return nd_blk_namespace_label_update(nd_region, nsblk, size); | |
f524bf27 DW |
411 | } else |
412 | return -ENXIO; | |
413 | } | |
414 | ||
bf9bccc1 DW |
415 | static ssize_t alt_name_store(struct device *dev, |
416 | struct device_attribute *attr, const char *buf, size_t len) | |
417 | { | |
f524bf27 | 418 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
419 | ssize_t rc; |
420 | ||
421 | device_lock(dev); | |
422 | nvdimm_bus_lock(dev); | |
423 | wait_nvdimm_bus_probe_idle(dev); | |
424 | rc = __alt_name_store(dev, buf, len); | |
f524bf27 DW |
425 | if (rc >= 0) |
426 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 | 427 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
bf9bccc1 DW |
428 | nvdimm_bus_unlock(dev); |
429 | device_unlock(dev); | |
430 | ||
f524bf27 | 431 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
432 | } |
433 | ||
434 | static ssize_t alt_name_show(struct device *dev, | |
435 | struct device_attribute *attr, char *buf) | |
436 | { | |
437 | char *ns_altname; | |
438 | ||
439 | if (is_namespace_pmem(dev)) { | |
440 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
441 | ||
442 | ns_altname = nspm->alt_name; | |
443 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
444 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
445 | ||
446 | ns_altname = nsblk->alt_name; | |
bf9bccc1 DW |
447 | } else |
448 | return -ENXIO; | |
449 | ||
450 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); | |
451 | } | |
452 | static DEVICE_ATTR_RW(alt_name); | |
453 | ||
454 | static int scan_free(struct nd_region *nd_region, | |
455 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
456 | resource_size_t n) | |
457 | { | |
458 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
459 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
460 | int rc = 0; | |
461 | ||
462 | while (n) { | |
463 | struct resource *res, *last; | |
464 | resource_size_t new_start; | |
465 | ||
466 | last = NULL; | |
467 | for_each_dpa_resource(ndd, res) | |
468 | if (strcmp(res->name, label_id->id) == 0) | |
469 | last = res; | |
470 | res = last; | |
471 | if (!res) | |
472 | return 0; | |
473 | ||
474 | if (n >= resource_size(res)) { | |
475 | n -= resource_size(res); | |
476 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); | |
477 | nvdimm_free_dpa(ndd, res); | |
478 | /* retry with last resource deleted */ | |
479 | continue; | |
480 | } | |
481 | ||
482 | /* | |
483 | * Keep BLK allocations relegated to high DPA as much as | |
484 | * possible | |
485 | */ | |
486 | if (is_blk) | |
487 | new_start = res->start + n; | |
488 | else | |
489 | new_start = res->start; | |
490 | ||
491 | rc = adjust_resource(res, new_start, resource_size(res) - n); | |
1b40e09a DW |
492 | if (rc == 0) |
493 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
494 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
495 | break; | |
496 | } | |
497 | ||
498 | return rc; | |
499 | } | |
500 | ||
501 | /** | |
502 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id | |
503 | * @nd_region: the set of dimms to reclaim @n bytes from | |
504 | * @label_id: unique identifier for the namespace consuming this dpa range | |
505 | * @n: number of bytes per-dimm to release | |
506 | * | |
507 | * Assumes resources are ordered. Starting from the end try to | |
508 | * adjust_resource() the allocation to @n, but if @n is larger than the | |
509 | * allocation delete it and find the 'new' last allocation in the label | |
510 | * set. | |
511 | */ | |
512 | static int shrink_dpa_allocation(struct nd_region *nd_region, | |
513 | struct nd_label_id *label_id, resource_size_t n) | |
514 | { | |
515 | int i; | |
516 | ||
517 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
518 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
519 | int rc; | |
520 | ||
521 | rc = scan_free(nd_region, nd_mapping, label_id, n); | |
522 | if (rc) | |
523 | return rc; | |
524 | } | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, | |
530 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, | |
531 | resource_size_t n) | |
532 | { | |
533 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
534 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
535 | resource_size_t first_dpa; | |
536 | struct resource *res; | |
537 | int rc = 0; | |
538 | ||
539 | /* allocate blk from highest dpa first */ | |
540 | if (is_blk) | |
541 | first_dpa = nd_mapping->start + nd_mapping->size - n; | |
542 | else | |
543 | first_dpa = nd_mapping->start; | |
544 | ||
545 | /* first resource allocation for this label-id or dimm */ | |
546 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); | |
547 | if (!res) | |
548 | rc = -EBUSY; | |
549 | ||
550 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); | |
551 | return rc ? n : 0; | |
552 | } | |
553 | ||
762d067d DW |
554 | |
555 | /** | |
556 | * space_valid() - validate free dpa space against constraints | |
557 | * @nd_region: hosting region of the free space | |
558 | * @ndd: dimm device data for debug | |
559 | * @label_id: namespace id to allocate space | |
560 | * @prev: potential allocation that precedes free space | |
561 | * @next: allocation that follows the given free space range | |
562 | * @exist: first allocation with same id in the mapping | |
563 | * @n: range that must satisfied for pmem allocations | |
564 | * @valid: free space range to validate | |
565 | * | |
566 | * BLK-space is valid as long as it does not precede a PMEM | |
567 | * allocation in a given region. PMEM-space must be contiguous | |
568 | * and adjacent to an existing existing allocation (if one | |
569 | * exists). If reserving PMEM any space is valid. | |
570 | */ | |
571 | static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, | |
572 | struct nd_label_id *label_id, struct resource *prev, | |
573 | struct resource *next, struct resource *exist, | |
574 | resource_size_t n, struct resource *valid) | |
bf9bccc1 | 575 | { |
762d067d DW |
576 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
577 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
578 | ||
579 | if (valid->start >= valid->end) | |
580 | goto invalid; | |
581 | ||
582 | if (is_reserve) | |
583 | return; | |
584 | ||
585 | if (!is_pmem) { | |
586 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
587 | struct nvdimm_bus *nvdimm_bus; | |
588 | struct blk_alloc_info info = { | |
589 | .nd_mapping = nd_mapping, | |
590 | .available = nd_mapping->size, | |
591 | .res = valid, | |
592 | }; | |
593 | ||
594 | WARN_ON(!is_nd_blk(&nd_region->dev)); | |
595 | nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); | |
596 | device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); | |
597 | return; | |
598 | } | |
599 | ||
600 | /* allocation needs to be contiguous, so this is all or nothing */ | |
601 | if (resource_size(valid) < n) | |
602 | goto invalid; | |
603 | ||
604 | /* we've got all the space we need and no existing allocation */ | |
605 | if (!exist) | |
606 | return; | |
607 | ||
608 | /* allocation needs to be contiguous with the existing namespace */ | |
609 | if (valid->start == exist->end + 1 | |
610 | || valid->end == exist->start - 1) | |
611 | return; | |
612 | ||
613 | invalid: | |
614 | /* truncate @valid size to 0 */ | |
615 | valid->end = valid->start - 1; | |
bf9bccc1 DW |
616 | } |
617 | ||
618 | enum alloc_loc { | |
619 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, | |
620 | }; | |
621 | ||
622 | static resource_size_t scan_allocate(struct nd_region *nd_region, | |
623 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
624 | resource_size_t n) | |
625 | { | |
626 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; | |
627 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
628 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
762d067d | 629 | struct resource *res, *exist = NULL, valid; |
bf9bccc1 | 630 | const resource_size_t to_allocate = n; |
bf9bccc1 DW |
631 | int first; |
632 | ||
762d067d DW |
633 | for_each_dpa_resource(ndd, res) |
634 | if (strcmp(label_id->id, res->name) == 0) | |
635 | exist = res; | |
636 | ||
637 | valid.start = nd_mapping->start; | |
638 | valid.end = mapping_end; | |
639 | valid.name = "free space"; | |
bf9bccc1 DW |
640 | retry: |
641 | first = 0; | |
642 | for_each_dpa_resource(ndd, res) { | |
bf9bccc1 | 643 | struct resource *next = res->sibling, *new_res = NULL; |
762d067d | 644 | resource_size_t allocate, available = 0; |
bf9bccc1 DW |
645 | enum alloc_loc loc = ALLOC_ERR; |
646 | const char *action; | |
647 | int rc = 0; | |
648 | ||
649 | /* ignore resources outside this nd_mapping */ | |
650 | if (res->start > mapping_end) | |
651 | continue; | |
652 | if (res->end < nd_mapping->start) | |
653 | continue; | |
654 | ||
655 | /* space at the beginning of the mapping */ | |
656 | if (!first++ && res->start > nd_mapping->start) { | |
762d067d DW |
657 | valid.start = nd_mapping->start; |
658 | valid.end = res->start - 1; | |
659 | space_valid(nd_region, ndd, label_id, NULL, next, exist, | |
660 | to_allocate, &valid); | |
661 | available = resource_size(&valid); | |
662 | if (available) | |
bf9bccc1 DW |
663 | loc = ALLOC_BEFORE; |
664 | } | |
665 | ||
666 | /* space between allocations */ | |
667 | if (!loc && next) { | |
762d067d DW |
668 | valid.start = res->start + resource_size(res); |
669 | valid.end = min(mapping_end, next->start - 1); | |
670 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
671 | to_allocate, &valid); | |
672 | available = resource_size(&valid); | |
673 | if (available) | |
bf9bccc1 | 674 | loc = ALLOC_MID; |
bf9bccc1 DW |
675 | } |
676 | ||
677 | /* space at the end of the mapping */ | |
678 | if (!loc && !next) { | |
762d067d DW |
679 | valid.start = res->start + resource_size(res); |
680 | valid.end = mapping_end; | |
681 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
682 | to_allocate, &valid); | |
683 | available = resource_size(&valid); | |
684 | if (available) | |
bf9bccc1 | 685 | loc = ALLOC_AFTER; |
bf9bccc1 DW |
686 | } |
687 | ||
688 | if (!loc || !available) | |
689 | continue; | |
690 | allocate = min(available, n); | |
691 | switch (loc) { | |
692 | case ALLOC_BEFORE: | |
693 | if (strcmp(res->name, label_id->id) == 0) { | |
694 | /* adjust current resource up */ | |
bf9bccc1 DW |
695 | rc = adjust_resource(res, res->start - allocate, |
696 | resource_size(res) + allocate); | |
697 | action = "cur grow up"; | |
698 | } else | |
699 | action = "allocate"; | |
700 | break; | |
701 | case ALLOC_MID: | |
702 | if (strcmp(next->name, label_id->id) == 0) { | |
703 | /* adjust next resource up */ | |
bf9bccc1 DW |
704 | rc = adjust_resource(next, next->start |
705 | - allocate, resource_size(next) | |
706 | + allocate); | |
707 | new_res = next; | |
708 | action = "next grow up"; | |
709 | } else if (strcmp(res->name, label_id->id) == 0) { | |
710 | action = "grow down"; | |
711 | } else | |
712 | action = "allocate"; | |
713 | break; | |
714 | case ALLOC_AFTER: | |
715 | if (strcmp(res->name, label_id->id) == 0) | |
716 | action = "grow down"; | |
717 | else | |
718 | action = "allocate"; | |
719 | break; | |
720 | default: | |
721 | return n; | |
722 | } | |
723 | ||
724 | if (strcmp(action, "allocate") == 0) { | |
725 | /* BLK allocate bottom up */ | |
726 | if (!is_pmem) | |
762d067d | 727 | valid.start += available - allocate; |
bf9bccc1 DW |
728 | |
729 | new_res = nvdimm_allocate_dpa(ndd, label_id, | |
762d067d | 730 | valid.start, allocate); |
bf9bccc1 DW |
731 | if (!new_res) |
732 | rc = -EBUSY; | |
733 | } else if (strcmp(action, "grow down") == 0) { | |
734 | /* adjust current resource down */ | |
735 | rc = adjust_resource(res, res->start, resource_size(res) | |
736 | + allocate); | |
1b40e09a DW |
737 | if (rc == 0) |
738 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
739 | } |
740 | ||
741 | if (!new_res) | |
742 | new_res = res; | |
743 | ||
744 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", | |
745 | action, loc, rc); | |
746 | ||
747 | if (rc) | |
748 | return n; | |
749 | ||
750 | n -= allocate; | |
751 | if (n) { | |
752 | /* | |
753 | * Retry scan with newly inserted resources. | |
754 | * For example, if we did an ALLOC_BEFORE | |
755 | * insertion there may also have been space | |
756 | * available for an ALLOC_AFTER insertion, so we | |
757 | * need to check this same resource again | |
758 | */ | |
759 | goto retry; | |
760 | } else | |
761 | return 0; | |
762 | } | |
763 | ||
1b40e09a DW |
764 | /* |
765 | * If we allocated nothing in the BLK case it may be because we are in | |
766 | * an initial "pmem-reserve pass". Only do an initial BLK allocation | |
767 | * when none of the DPA space is reserved. | |
768 | */ | |
769 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) | |
bf9bccc1 DW |
770 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
771 | return n; | |
772 | } | |
773 | ||
1b40e09a DW |
774 | static int merge_dpa(struct nd_region *nd_region, |
775 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) | |
776 | { | |
777 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
778 | struct resource *res; | |
779 | ||
780 | if (strncmp("pmem", label_id->id, 4) == 0) | |
781 | return 0; | |
782 | retry: | |
783 | for_each_dpa_resource(ndd, res) { | |
784 | int rc; | |
785 | struct resource *next = res->sibling; | |
786 | resource_size_t end = res->start + resource_size(res); | |
787 | ||
788 | if (!next || strcmp(res->name, label_id->id) != 0 | |
789 | || strcmp(next->name, label_id->id) != 0 | |
790 | || end != next->start) | |
791 | continue; | |
792 | end += resource_size(next); | |
793 | nvdimm_free_dpa(ndd, next); | |
794 | rc = adjust_resource(res, res->start, end - res->start); | |
795 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); | |
796 | if (rc) | |
797 | return rc; | |
798 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
799 | goto retry; | |
800 | } | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
12e3129e | 805 | int __reserve_free_pmem(struct device *dev, void *data) |
1b40e09a DW |
806 | { |
807 | struct nvdimm *nvdimm = data; | |
808 | struct nd_region *nd_region; | |
809 | struct nd_label_id label_id; | |
810 | int i; | |
811 | ||
c9e582aa | 812 | if (!is_memory(dev)) |
1b40e09a DW |
813 | return 0; |
814 | ||
815 | nd_region = to_nd_region(dev); | |
816 | if (nd_region->ndr_mappings == 0) | |
817 | return 0; | |
818 | ||
819 | memset(&label_id, 0, sizeof(label_id)); | |
820 | strcat(label_id.id, "pmem-reserve"); | |
821 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
822 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
823 | resource_size_t n, rem = 0; | |
824 | ||
825 | if (nd_mapping->nvdimm != nvdimm) | |
826 | continue; | |
827 | ||
828 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); | |
829 | if (n == 0) | |
830 | return 0; | |
831 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); | |
832 | dev_WARN_ONCE(&nd_region->dev, rem, | |
833 | "pmem reserve underrun: %#llx of %#llx bytes\n", | |
834 | (unsigned long long) n - rem, | |
835 | (unsigned long long) n); | |
836 | return rem ? -ENXIO : 0; | |
837 | } | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
12e3129e | 842 | void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
1b40e09a DW |
843 | struct nd_mapping *nd_mapping) |
844 | { | |
845 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
846 | struct resource *res, *_res; | |
847 | ||
848 | for_each_dpa_resource_safe(ndd, res, _res) | |
849 | if (strcmp(res->name, "pmem-reserve") == 0) | |
850 | nvdimm_free_dpa(ndd, res); | |
851 | } | |
852 | ||
853 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
854 | struct nd_mapping *nd_mapping) | |
855 | { | |
856 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
857 | int rc; | |
858 | ||
859 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, | |
860 | __reserve_free_pmem); | |
861 | if (rc) | |
862 | release_free_pmem(nvdimm_bus, nd_mapping); | |
863 | return rc; | |
864 | } | |
865 | ||
bf9bccc1 DW |
866 | /** |
867 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id | |
868 | * @nd_region: the set of dimms to allocate @n more bytes from | |
869 | * @label_id: unique identifier for the namespace consuming this dpa range | |
870 | * @n: number of bytes per-dimm to add to the existing allocation | |
871 | * | |
872 | * Assumes resources are ordered. For BLK regions, first consume | |
873 | * BLK-only available DPA free space, then consume PMEM-aliased DPA | |
874 | * space starting at the highest DPA. For PMEM regions start | |
875 | * allocations from the start of an interleave set and end at the first | |
876 | * BLK allocation or the end of the interleave set, whichever comes | |
877 | * first. | |
878 | */ | |
879 | static int grow_dpa_allocation(struct nd_region *nd_region, | |
880 | struct nd_label_id *label_id, resource_size_t n) | |
881 | { | |
1b40e09a DW |
882 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
883 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
bf9bccc1 DW |
884 | int i; |
885 | ||
886 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
887 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1b40e09a DW |
888 | resource_size_t rem = n; |
889 | int rc, j; | |
890 | ||
891 | /* | |
892 | * In the BLK case try once with all unallocated PMEM | |
893 | * reserved, and once without | |
894 | */ | |
895 | for (j = is_pmem; j < 2; j++) { | |
896 | bool blk_only = j == 0; | |
897 | ||
898 | if (blk_only) { | |
899 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); | |
900 | if (rc) | |
901 | return rc; | |
902 | } | |
903 | rem = scan_allocate(nd_region, nd_mapping, | |
904 | label_id, rem); | |
905 | if (blk_only) | |
906 | release_free_pmem(nvdimm_bus, nd_mapping); | |
bf9bccc1 | 907 | |
1b40e09a DW |
908 | /* try again and allow encroachments into PMEM */ |
909 | if (rem == 0) | |
910 | break; | |
911 | } | |
912 | ||
913 | dev_WARN_ONCE(&nd_region->dev, rem, | |
914 | "allocation underrun: %#llx of %#llx bytes\n", | |
915 | (unsigned long long) n - rem, | |
916 | (unsigned long long) n); | |
917 | if (rem) | |
918 | return -ENXIO; | |
919 | ||
920 | rc = merge_dpa(nd_region, nd_mapping, label_id); | |
bf9bccc1 DW |
921 | if (rc) |
922 | return rc; | |
923 | } | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
0e3b0d12 | 928 | static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
bf9bccc1 DW |
929 | struct nd_namespace_pmem *nspm, resource_size_t size) |
930 | { | |
931 | struct resource *res = &nspm->nsio.res; | |
0e3b0d12 | 932 | resource_size_t offset = 0; |
bf9bccc1 | 933 | |
0e3b0d12 DW |
934 | if (size && !nspm->uuid) { |
935 | WARN_ON_ONCE(1); | |
936 | size = 0; | |
937 | } | |
938 | ||
939 | if (size && nspm->uuid) { | |
940 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
941 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
942 | struct nd_label_id label_id; | |
943 | struct resource *res; | |
944 | ||
945 | if (!ndd) { | |
946 | size = 0; | |
947 | goto out; | |
948 | } | |
949 | ||
950 | nd_label_gen_id(&label_id, nspm->uuid, 0); | |
951 | ||
952 | /* calculate a spa offset from the dpa allocation offset */ | |
953 | for_each_dpa_resource(ndd, res) | |
954 | if (strcmp(res->name, label_id.id) == 0) { | |
955 | offset = (res->start - nd_mapping->start) | |
956 | * nd_region->ndr_mappings; | |
957 | goto out; | |
958 | } | |
959 | ||
960 | WARN_ON_ONCE(1); | |
961 | size = 0; | |
962 | } | |
963 | ||
964 | out: | |
965 | res->start = nd_region->ndr_start + offset; | |
966 | res->end = res->start + size - 1; | |
bf9bccc1 DW |
967 | } |
968 | ||
bd26d0d0 DK |
969 | static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where) |
970 | { | |
971 | if (!uuid) { | |
972 | dev_dbg(dev, "%s: uuid not set\n", where); | |
973 | return true; | |
974 | } | |
975 | return false; | |
976 | } | |
977 | ||
bf9bccc1 DW |
978 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
979 | { | |
980 | resource_size_t allocated = 0, available = 0; | |
981 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1f19b983 | 982 | struct nd_namespace_common *ndns = to_ndns(dev); |
bf9bccc1 DW |
983 | struct nd_mapping *nd_mapping; |
984 | struct nvdimm_drvdata *ndd; | |
985 | struct nd_label_id label_id; | |
986 | u32 flags = 0, remainder; | |
9d032f42 | 987 | int rc, i, id = -1; |
bf9bccc1 | 988 | u8 *uuid = NULL; |
bf9bccc1 | 989 | |
1f19b983 | 990 | if (dev->driver || ndns->claim) |
bf9bccc1 DW |
991 | return -EBUSY; |
992 | ||
993 | if (is_namespace_pmem(dev)) { | |
994 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
995 | ||
996 | uuid = nspm->uuid; | |
9d032f42 | 997 | id = nspm->id; |
bf9bccc1 | 998 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
999 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1000 | ||
1001 | uuid = nsblk->uuid; | |
1002 | flags = NSLABEL_FLAG_LOCAL; | |
9d032f42 | 1003 | id = nsblk->id; |
bf9bccc1 DW |
1004 | } |
1005 | ||
1006 | /* | |
1007 | * We need a uuid for the allocation-label and dimm(s) on which | |
1008 | * to store the label. | |
1009 | */ | |
bd26d0d0 | 1010 | if (uuid_not_set(uuid, dev, __func__)) |
bf9bccc1 | 1011 | return -ENXIO; |
bd26d0d0 | 1012 | if (nd_region->ndr_mappings == 0) { |
426824d6 | 1013 | dev_dbg(dev, "not associated with dimm(s)\n"); |
bd26d0d0 DK |
1014 | return -ENXIO; |
1015 | } | |
bf9bccc1 DW |
1016 | |
1017 | div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); | |
1018 | if (remainder) { | |
1019 | dev_dbg(dev, "%llu is not %dK aligned\n", val, | |
1020 | (SZ_4K * nd_region->ndr_mappings) / SZ_1K); | |
1021 | return -EINVAL; | |
1022 | } | |
1023 | ||
1024 | nd_label_gen_id(&label_id, uuid, flags); | |
1025 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1026 | nd_mapping = &nd_region->mapping[i]; | |
1027 | ndd = to_ndd(nd_mapping); | |
1028 | ||
1029 | /* | |
1030 | * All dimms in an interleave set, or the base dimm for a blk | |
1031 | * region, need to be enabled for the size to be changed. | |
1032 | */ | |
1033 | if (!ndd) | |
1034 | return -ENXIO; | |
1035 | ||
1036 | allocated += nvdimm_allocated_dpa(ndd, &label_id); | |
1037 | } | |
12e3129e | 1038 | available = nd_region_allocatable_dpa(nd_region); |
bf9bccc1 DW |
1039 | |
1040 | if (val > available + allocated) | |
1041 | return -ENOSPC; | |
1042 | ||
1043 | if (val == allocated) | |
1044 | return 0; | |
1045 | ||
1046 | val = div_u64(val, nd_region->ndr_mappings); | |
1047 | allocated = div_u64(allocated, nd_region->ndr_mappings); | |
1048 | if (val < allocated) | |
1049 | rc = shrink_dpa_allocation(nd_region, &label_id, | |
1050 | allocated - val); | |
1051 | else | |
1052 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); | |
1053 | ||
1054 | if (rc) | |
1055 | return rc; | |
1056 | ||
1057 | if (is_namespace_pmem(dev)) { | |
1058 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1059 | ||
0e3b0d12 | 1060 | nd_namespace_pmem_set_resource(nd_region, nspm, |
bf9bccc1 DW |
1061 | val * nd_region->ndr_mappings); |
1062 | } | |
1063 | ||
1f19b983 DW |
1064 | /* |
1065 | * Try to delete the namespace if we deleted all of its | |
9d032f42 DW |
1066 | * allocation, this is not the seed or 0th device for the |
1067 | * region, and it is not actively claimed by a btt, pfn, or dax | |
1068 | * instance. | |
1f19b983 | 1069 | */ |
9d032f42 | 1070 | if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim) |
1f19b983 DW |
1071 | nd_device_unregister(dev, ND_ASYNC); |
1072 | ||
bf9bccc1 DW |
1073 | return rc; |
1074 | } | |
1075 | ||
1076 | static ssize_t size_store(struct device *dev, | |
1077 | struct device_attribute *attr, const char *buf, size_t len) | |
1078 | { | |
f524bf27 | 1079 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
1080 | unsigned long long val; |
1081 | u8 **uuid = NULL; | |
1082 | int rc; | |
1083 | ||
1084 | rc = kstrtoull(buf, 0, &val); | |
1085 | if (rc) | |
1086 | return rc; | |
1087 | ||
1088 | device_lock(dev); | |
1089 | nvdimm_bus_lock(dev); | |
1090 | wait_nvdimm_bus_probe_idle(dev); | |
1091 | rc = __size_store(dev, val); | |
f524bf27 DW |
1092 | if (rc >= 0) |
1093 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
1094 | |
1095 | if (is_namespace_pmem(dev)) { | |
1096 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1097 | ||
1098 | uuid = &nspm->uuid; | |
1099 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1100 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1101 | ||
1102 | uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1103 | } |
1104 | ||
1105 | if (rc == 0 && val == 0 && uuid) { | |
1106 | /* setting size zero == 'delete namespace' */ | |
1107 | kfree(*uuid); | |
1108 | *uuid = NULL; | |
1109 | } | |
1110 | ||
426824d6 | 1111 | dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc); |
bf9bccc1 DW |
1112 | |
1113 | nvdimm_bus_unlock(dev); | |
1114 | device_unlock(dev); | |
1115 | ||
f524bf27 | 1116 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1117 | } |
1118 | ||
8c2f7e86 | 1119 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc1 | 1120 | { |
8c2f7e86 | 1121 | struct device *dev = &ndns->dev; |
1b40e09a | 1122 | |
bf9bccc1 DW |
1123 | if (is_namespace_pmem(dev)) { |
1124 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1125 | ||
8c2f7e86 | 1126 | return resource_size(&nspm->nsio.res); |
bf9bccc1 | 1127 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 | 1128 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc1 DW |
1129 | } else if (is_namespace_io(dev)) { |
1130 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1131 | ||
8c2f7e86 DW |
1132 | return resource_size(&nsio->res); |
1133 | } else | |
1134 | WARN_ONCE(1, "unknown namespace type\n"); | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) | |
1139 | { | |
1140 | resource_size_t size; | |
1b40e09a | 1141 | |
8c2f7e86 DW |
1142 | nvdimm_bus_lock(&ndns->dev); |
1143 | size = __nvdimm_namespace_capacity(ndns); | |
1144 | nvdimm_bus_unlock(&ndns->dev); | |
1145 | ||
1146 | return size; | |
1147 | } | |
1148 | EXPORT_SYMBOL(nvdimm_namespace_capacity); | |
1149 | ||
08e6b3c6 DW |
1150 | bool nvdimm_namespace_locked(struct nd_namespace_common *ndns) |
1151 | { | |
1152 | int i; | |
1153 | bool locked = false; | |
1154 | struct device *dev = &ndns->dev; | |
1155 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1156 | ||
1157 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1158 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1159 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
1160 | ||
1161 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) { | |
1162 | dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm)); | |
1163 | locked = true; | |
1164 | } | |
1165 | } | |
1166 | return locked; | |
1167 | } | |
1168 | EXPORT_SYMBOL(nvdimm_namespace_locked); | |
1169 | ||
8c2f7e86 DW |
1170 | static ssize_t size_show(struct device *dev, |
1171 | struct device_attribute *attr, char *buf) | |
1172 | { | |
1173 | return sprintf(buf, "%llu\n", (unsigned long long) | |
1174 | nvdimm_namespace_capacity(to_ndns(dev))); | |
bf9bccc1 | 1175 | } |
b44fe760 | 1176 | static DEVICE_ATTR(size, 0444, size_show, size_store); |
bf9bccc1 | 1177 | |
f95b4bca | 1178 | static u8 *namespace_to_uuid(struct device *dev) |
bf9bccc1 | 1179 | { |
bf9bccc1 DW |
1180 | if (is_namespace_pmem(dev)) { |
1181 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1182 | ||
f95b4bca | 1183 | return nspm->uuid; |
bf9bccc1 | 1184 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
1185 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1186 | ||
f95b4bca | 1187 | return nsblk->uuid; |
bf9bccc1 | 1188 | } else |
f95b4bca DW |
1189 | return ERR_PTR(-ENXIO); |
1190 | } | |
1191 | ||
1192 | static ssize_t uuid_show(struct device *dev, | |
1193 | struct device_attribute *attr, char *buf) | |
1194 | { | |
1195 | u8 *uuid = namespace_to_uuid(dev); | |
bf9bccc1 | 1196 | |
f95b4bca DW |
1197 | if (IS_ERR(uuid)) |
1198 | return PTR_ERR(uuid); | |
bf9bccc1 DW |
1199 | if (uuid) |
1200 | return sprintf(buf, "%pUb\n", uuid); | |
1201 | return sprintf(buf, "\n"); | |
1202 | } | |
1203 | ||
1204 | /** | |
1205 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" | |
1206 | * @nd_region: parent region so we can updates all dimms in the set | |
1207 | * @dev: namespace type for generating label_id | |
1208 | * @new_uuid: incoming uuid | |
1209 | * @old_uuid: reference to the uuid storage location in the namespace object | |
1210 | */ | |
1211 | static int namespace_update_uuid(struct nd_region *nd_region, | |
1212 | struct device *dev, u8 *new_uuid, u8 **old_uuid) | |
1213 | { | |
1214 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; | |
1215 | struct nd_label_id old_label_id; | |
1216 | struct nd_label_id new_label_id; | |
f524bf27 | 1217 | int i; |
bf9bccc1 | 1218 | |
f524bf27 DW |
1219 | if (!nd_is_uuid_unique(dev, new_uuid)) |
1220 | return -EINVAL; | |
bf9bccc1 DW |
1221 | |
1222 | if (*old_uuid == NULL) | |
1223 | goto out; | |
1224 | ||
f524bf27 DW |
1225 | /* |
1226 | * If we've already written a label with this uuid, then it's | |
1227 | * too late to rename because we can't reliably update the uuid | |
1228 | * without losing the old namespace. Userspace must delete this | |
1229 | * namespace to abandon the old uuid. | |
1230 | */ | |
1231 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1232 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1233 | ||
1234 | /* | |
1235 | * This check by itself is sufficient because old_uuid | |
1236 | * would be NULL above if this uuid did not exist in the | |
1237 | * currently written set. | |
1238 | * | |
1239 | * FIXME: can we delete uuid with zero dpa allocated? | |
1240 | */ | |
ae8219f1 | 1241 | if (list_empty(&nd_mapping->labels)) |
f524bf27 DW |
1242 | return -EBUSY; |
1243 | } | |
1244 | ||
bf9bccc1 DW |
1245 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
1246 | nd_label_gen_id(&new_label_id, new_uuid, flags); | |
1247 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1248 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1249 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1250 | struct resource *res; | |
1251 | ||
1252 | for_each_dpa_resource(ndd, res) | |
1253 | if (strcmp(res->name, old_label_id.id) == 0) | |
1254 | sprintf((void *) res->name, "%s", | |
1255 | new_label_id.id); | |
1256 | } | |
1257 | kfree(*old_uuid); | |
1258 | out: | |
1259 | *old_uuid = new_uuid; | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | static ssize_t uuid_store(struct device *dev, | |
1264 | struct device_attribute *attr, const char *buf, size_t len) | |
1265 | { | |
1266 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1267 | u8 *uuid = NULL; | |
8c2f7e86 | 1268 | ssize_t rc = 0; |
bf9bccc1 | 1269 | u8 **ns_uuid; |
bf9bccc1 DW |
1270 | |
1271 | if (is_namespace_pmem(dev)) { | |
1272 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1273 | ||
1274 | ns_uuid = &nspm->uuid; | |
1275 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1276 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1277 | ||
1278 | ns_uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1279 | } else |
1280 | return -ENXIO; | |
1281 | ||
1282 | device_lock(dev); | |
1283 | nvdimm_bus_lock(dev); | |
1284 | wait_nvdimm_bus_probe_idle(dev); | |
8c2f7e86 DW |
1285 | if (to_ndns(dev)->claim) |
1286 | rc = -EBUSY; | |
1287 | if (rc >= 0) | |
1288 | rc = nd_uuid_store(dev, &uuid, buf, len); | |
bf9bccc1 DW |
1289 | if (rc >= 0) |
1290 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); | |
f524bf27 DW |
1291 | if (rc >= 0) |
1292 | rc = nd_namespace_label_update(nd_region, dev); | |
1293 | else | |
1294 | kfree(uuid); | |
426824d6 DW |
1295 | dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf, |
1296 | buf[len - 1] == '\n' ? "" : "\n"); | |
bf9bccc1 DW |
1297 | nvdimm_bus_unlock(dev); |
1298 | device_unlock(dev); | |
1299 | ||
f524bf27 | 1300 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1301 | } |
1302 | static DEVICE_ATTR_RW(uuid); | |
1303 | ||
1304 | static ssize_t resource_show(struct device *dev, | |
1305 | struct device_attribute *attr, char *buf) | |
1306 | { | |
1307 | struct resource *res; | |
1308 | ||
1309 | if (is_namespace_pmem(dev)) { | |
1310 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1311 | ||
1312 | res = &nspm->nsio.res; | |
1313 | } else if (is_namespace_io(dev)) { | |
1314 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1315 | ||
1316 | res = &nsio->res; | |
1317 | } else | |
1318 | return -ENXIO; | |
1319 | ||
1320 | /* no address to convey if the namespace has no allocation */ | |
1321 | if (resource_size(res) == 0) | |
1322 | return -ENXIO; | |
1323 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); | |
1324 | } | |
1325 | static DEVICE_ATTR_RO(resource); | |
1326 | ||
f979b13c | 1327 | static const unsigned long blk_lbasize_supported[] = { 512, 520, 528, |
fcae6957 | 1328 | 4096, 4104, 4160, 4224, 0 }; |
1b40e09a | 1329 | |
f979b13c DW |
1330 | static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; |
1331 | ||
1b40e09a DW |
1332 | static ssize_t sector_size_show(struct device *dev, |
1333 | struct device_attribute *attr, char *buf) | |
1334 | { | |
f979b13c DW |
1335 | if (is_namespace_blk(dev)) { |
1336 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1b40e09a | 1337 | |
b2c48f9f | 1338 | return nd_size_select_show(nsblk->lbasize, |
f979b13c DW |
1339 | blk_lbasize_supported, buf); |
1340 | } | |
1b40e09a | 1341 | |
f979b13c DW |
1342 | if (is_namespace_pmem(dev)) { |
1343 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1344 | ||
b2c48f9f | 1345 | return nd_size_select_show(nspm->lbasize, |
f979b13c DW |
1346 | pmem_lbasize_supported, buf); |
1347 | } | |
1348 | return -ENXIO; | |
1b40e09a DW |
1349 | } |
1350 | ||
1351 | static ssize_t sector_size_store(struct device *dev, | |
1352 | struct device_attribute *attr, const char *buf, size_t len) | |
1353 | { | |
f524bf27 | 1354 | struct nd_region *nd_region = to_nd_region(dev->parent); |
f979b13c DW |
1355 | const unsigned long *supported; |
1356 | unsigned long *lbasize; | |
8c2f7e86 | 1357 | ssize_t rc = 0; |
1b40e09a | 1358 | |
f979b13c DW |
1359 | if (is_namespace_blk(dev)) { |
1360 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1361 | ||
1362 | lbasize = &nsblk->lbasize; | |
1363 | supported = blk_lbasize_supported; | |
1364 | } else if (is_namespace_pmem(dev)) { | |
1365 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1366 | ||
1367 | lbasize = &nspm->lbasize; | |
1368 | supported = pmem_lbasize_supported; | |
1369 | } else | |
1b40e09a DW |
1370 | return -ENXIO; |
1371 | ||
1372 | device_lock(dev); | |
1373 | nvdimm_bus_lock(dev); | |
8c2f7e86 DW |
1374 | if (to_ndns(dev)->claim) |
1375 | rc = -EBUSY; | |
1376 | if (rc >= 0) | |
b2c48f9f | 1377 | rc = nd_size_select_store(dev, buf, lbasize, supported); |
f524bf27 DW |
1378 | if (rc >= 0) |
1379 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 DW |
1380 | dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote", |
1381 | buf, buf[len - 1] == '\n' ? "" : "\n"); | |
1b40e09a DW |
1382 | nvdimm_bus_unlock(dev); |
1383 | device_unlock(dev); | |
1384 | ||
1385 | return rc ? rc : len; | |
1386 | } | |
1387 | static DEVICE_ATTR_RW(sector_size); | |
1388 | ||
0ba1c634 DW |
1389 | static ssize_t dpa_extents_show(struct device *dev, |
1390 | struct device_attribute *attr, char *buf) | |
1391 | { | |
1392 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1393 | struct nd_label_id label_id; | |
1394 | int count = 0, i; | |
1395 | u8 *uuid = NULL; | |
1396 | u32 flags = 0; | |
1397 | ||
1398 | nvdimm_bus_lock(dev); | |
1399 | if (is_namespace_pmem(dev)) { | |
1400 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1401 | ||
1402 | uuid = nspm->uuid; | |
1403 | flags = 0; | |
1404 | } else if (is_namespace_blk(dev)) { | |
1405 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1406 | ||
1407 | uuid = nsblk->uuid; | |
1408 | flags = NSLABEL_FLAG_LOCAL; | |
1409 | } | |
1410 | ||
1411 | if (!uuid) | |
1412 | goto out; | |
1413 | ||
1414 | nd_label_gen_id(&label_id, uuid, flags); | |
1415 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1416 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1417 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1418 | struct resource *res; | |
1419 | ||
1420 | for_each_dpa_resource(ndd, res) | |
1421 | if (strcmp(res->name, label_id.id) == 0) | |
1422 | count++; | |
1423 | } | |
1424 | out: | |
1425 | nvdimm_bus_unlock(dev); | |
1426 | ||
1427 | return sprintf(buf, "%d\n", count); | |
1428 | } | |
1429 | static DEVICE_ATTR_RO(dpa_extents); | |
1430 | ||
14e49454 VV |
1431 | static int btt_claim_class(struct device *dev) |
1432 | { | |
1433 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1434 | int i, loop_bitmask = 0; | |
1435 | ||
1436 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1437 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1438 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1439 | struct nd_namespace_index *nsindex; | |
1440 | ||
33a56086 DW |
1441 | /* |
1442 | * If any of the DIMMs do not support labels the only | |
1443 | * possible BTT format is v1. | |
1444 | */ | |
1445 | if (!ndd) { | |
1446 | loop_bitmask = 0; | |
1447 | break; | |
1448 | } | |
1449 | ||
14e49454 VV |
1450 | nsindex = to_namespace_index(ndd, ndd->ns_current); |
1451 | if (nsindex == NULL) | |
1452 | loop_bitmask |= 1; | |
1453 | else { | |
1454 | /* check whether existing labels are v1.1 or v1.2 */ | |
1455 | if (__le16_to_cpu(nsindex->major) == 1 | |
1456 | && __le16_to_cpu(nsindex->minor) == 1) | |
1457 | loop_bitmask |= 2; | |
1458 | else | |
1459 | loop_bitmask |= 4; | |
1460 | } | |
1461 | } | |
1462 | /* | |
1463 | * If nsindex is null loop_bitmask's bit 0 will be set, and if an index | |
1464 | * block is found, a v1.1 label for any mapping will set bit 1, and a | |
1465 | * v1.2 label will set bit 2. | |
1466 | * | |
1467 | * At the end of the loop, at most one of the three bits must be set. | |
1468 | * If multiple bits were set, it means the different mappings disagree | |
1469 | * about their labels, and this must be cleaned up first. | |
1470 | * | |
1471 | * If all the label index blocks are found to agree, nsindex of NULL | |
1472 | * implies labels haven't been initialized yet, and when they will, | |
1473 | * they will be of the 1.2 format, so we can assume BTT2.0 | |
1474 | * | |
1475 | * If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are | |
1476 | * found, we enforce BTT2.0 | |
1477 | * | |
1478 | * If the loop was never entered, default to BTT1.1 (legacy namespaces) | |
1479 | */ | |
1480 | switch (loop_bitmask) { | |
1481 | case 0: | |
1482 | case 2: | |
1483 | return NVDIMM_CCLASS_BTT; | |
1484 | case 1: | |
1485 | case 4: | |
1486 | return NVDIMM_CCLASS_BTT2; | |
1487 | default: | |
1488 | return -ENXIO; | |
1489 | } | |
1490 | } | |
1491 | ||
8c2f7e86 DW |
1492 | static ssize_t holder_show(struct device *dev, |
1493 | struct device_attribute *attr, char *buf) | |
1494 | { | |
1495 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1496 | ssize_t rc; | |
1497 | ||
1498 | device_lock(dev); | |
1499 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); | |
1500 | device_unlock(dev); | |
1501 | ||
1502 | return rc; | |
1503 | } | |
1504 | static DEVICE_ATTR_RO(holder); | |
1505 | ||
b3fde74e DW |
1506 | static ssize_t __holder_class_store(struct device *dev, const char *buf) |
1507 | { | |
1508 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1509 | ||
1510 | if (dev->driver || ndns->claim) | |
1511 | return -EBUSY; | |
1512 | ||
075c3fdd | 1513 | if (sysfs_streq(buf, "btt")) |
14e49454 | 1514 | ndns->claim_class = btt_claim_class(dev); |
075c3fdd | 1515 | else if (sysfs_streq(buf, "pfn")) |
b3fde74e | 1516 | ndns->claim_class = NVDIMM_CCLASS_PFN; |
075c3fdd | 1517 | else if (sysfs_streq(buf, "dax")) |
b3fde74e | 1518 | ndns->claim_class = NVDIMM_CCLASS_DAX; |
075c3fdd | 1519 | else if (sysfs_streq(buf, "")) |
b3fde74e DW |
1520 | ndns->claim_class = NVDIMM_CCLASS_NONE; |
1521 | else | |
1522 | return -EINVAL; | |
1523 | ||
14e49454 VV |
1524 | /* btt_claim_class() could've returned an error */ |
1525 | if (ndns->claim_class < 0) | |
1526 | return ndns->claim_class; | |
1527 | ||
b3fde74e DW |
1528 | return 0; |
1529 | } | |
1530 | ||
1531 | static ssize_t holder_class_store(struct device *dev, | |
1532 | struct device_attribute *attr, const char *buf, size_t len) | |
1533 | { | |
1534 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1535 | ssize_t rc; | |
1536 | ||
1537 | device_lock(dev); | |
1538 | nvdimm_bus_lock(dev); | |
1539 | wait_nvdimm_bus_probe_idle(dev); | |
1540 | rc = __holder_class_store(dev, buf); | |
1541 | if (rc >= 0) | |
1542 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 | 1543 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
b3fde74e DW |
1544 | nvdimm_bus_unlock(dev); |
1545 | device_unlock(dev); | |
1546 | ||
1547 | return rc < 0 ? rc : len; | |
1548 | } | |
1549 | ||
1550 | static ssize_t holder_class_show(struct device *dev, | |
1551 | struct device_attribute *attr, char *buf) | |
1552 | { | |
1553 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1554 | ssize_t rc; | |
1555 | ||
1556 | device_lock(dev); | |
1557 | if (ndns->claim_class == NVDIMM_CCLASS_NONE) | |
1558 | rc = sprintf(buf, "\n"); | |
14e49454 VV |
1559 | else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) || |
1560 | (ndns->claim_class == NVDIMM_CCLASS_BTT2)) | |
b3fde74e DW |
1561 | rc = sprintf(buf, "btt\n"); |
1562 | else if (ndns->claim_class == NVDIMM_CCLASS_PFN) | |
1563 | rc = sprintf(buf, "pfn\n"); | |
1564 | else if (ndns->claim_class == NVDIMM_CCLASS_DAX) | |
1565 | rc = sprintf(buf, "dax\n"); | |
1566 | else | |
1567 | rc = sprintf(buf, "<unknown>\n"); | |
1568 | device_unlock(dev); | |
1569 | ||
1570 | return rc; | |
1571 | } | |
1572 | static DEVICE_ATTR_RW(holder_class); | |
1573 | ||
0731de0d DW |
1574 | static ssize_t mode_show(struct device *dev, |
1575 | struct device_attribute *attr, char *buf) | |
1576 | { | |
1577 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1578 | struct device *claim; | |
1579 | char *mode; | |
1580 | ssize_t rc; | |
1581 | ||
1582 | device_lock(dev); | |
1583 | claim = ndns->claim; | |
9c412428 | 1584 | if (claim && is_nd_btt(claim)) |
0731de0d | 1585 | mode = "safe"; |
9c412428 DW |
1586 | else if (claim && is_nd_pfn(claim)) |
1587 | mode = "memory"; | |
cd03412a DW |
1588 | else if (claim && is_nd_dax(claim)) |
1589 | mode = "dax"; | |
9c412428 DW |
1590 | else if (!claim && pmem_should_map_pages(dev)) |
1591 | mode = "memory"; | |
0731de0d DW |
1592 | else |
1593 | mode = "raw"; | |
1594 | rc = sprintf(buf, "%s\n", mode); | |
1595 | device_unlock(dev); | |
1596 | ||
1597 | return rc; | |
1598 | } | |
1599 | static DEVICE_ATTR_RO(mode); | |
1600 | ||
8c2f7e86 DW |
1601 | static ssize_t force_raw_store(struct device *dev, |
1602 | struct device_attribute *attr, const char *buf, size_t len) | |
1603 | { | |
1604 | bool force_raw; | |
1605 | int rc = strtobool(buf, &force_raw); | |
1606 | ||
1607 | if (rc) | |
1608 | return rc; | |
1609 | ||
1610 | to_ndns(dev)->force_raw = force_raw; | |
1611 | return len; | |
1612 | } | |
1613 | ||
1614 | static ssize_t force_raw_show(struct device *dev, | |
1615 | struct device_attribute *attr, char *buf) | |
1616 | { | |
1617 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); | |
1618 | } | |
1619 | static DEVICE_ATTR_RW(force_raw); | |
1620 | ||
3d88002e DW |
1621 | static struct attribute *nd_namespace_attributes[] = { |
1622 | &dev_attr_nstype.attr, | |
bf9bccc1 | 1623 | &dev_attr_size.attr, |
0731de0d | 1624 | &dev_attr_mode.attr, |
bf9bccc1 | 1625 | &dev_attr_uuid.attr, |
8c2f7e86 | 1626 | &dev_attr_holder.attr, |
bf9bccc1 DW |
1627 | &dev_attr_resource.attr, |
1628 | &dev_attr_alt_name.attr, | |
8c2f7e86 | 1629 | &dev_attr_force_raw.attr, |
1b40e09a | 1630 | &dev_attr_sector_size.attr, |
0ba1c634 | 1631 | &dev_attr_dpa_extents.attr, |
b3fde74e | 1632 | &dev_attr_holder_class.attr, |
3d88002e DW |
1633 | NULL, |
1634 | }; | |
1635 | ||
bf9bccc1 DW |
1636 | static umode_t namespace_visible(struct kobject *kobj, |
1637 | struct attribute *a, int n) | |
1638 | { | |
1639 | struct device *dev = container_of(kobj, struct device, kobj); | |
1640 | ||
1641 | if (a == &dev_attr_resource.attr) { | |
1642 | if (is_namespace_blk(dev)) | |
1643 | return 0; | |
c1fb3542 | 1644 | return 0400; |
bf9bccc1 DW |
1645 | } |
1646 | ||
1647 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { | |
1648 | if (a == &dev_attr_size.attr) | |
b44fe760 | 1649 | return 0644; |
1b40e09a | 1650 | |
bf9bccc1 DW |
1651 | return a->mode; |
1652 | } | |
1653 | ||
8c2f7e86 DW |
1654 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
1655 | || a == &dev_attr_holder.attr | |
b3fde74e | 1656 | || a == &dev_attr_holder_class.attr |
0731de0d DW |
1657 | || a == &dev_attr_force_raw.attr |
1658 | || a == &dev_attr_mode.attr) | |
bf9bccc1 DW |
1659 | return a->mode; |
1660 | ||
1661 | return 0; | |
1662 | } | |
1663 | ||
3d88002e DW |
1664 | static struct attribute_group nd_namespace_attribute_group = { |
1665 | .attrs = nd_namespace_attributes, | |
bf9bccc1 | 1666 | .is_visible = namespace_visible, |
3d88002e DW |
1667 | }; |
1668 | ||
1669 | static const struct attribute_group *nd_namespace_attribute_groups[] = { | |
1670 | &nd_device_attribute_group, | |
1671 | &nd_namespace_attribute_group, | |
74ae66c3 | 1672 | &nd_numa_attribute_group, |
3d88002e DW |
1673 | NULL, |
1674 | }; | |
1675 | ||
8c2f7e86 DW |
1676 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
1677 | { | |
1678 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; | |
e1455744 | 1679 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
cd03412a | 1680 | struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
0bfb8dd3 | 1681 | struct nd_namespace_common *ndns = NULL; |
8c2f7e86 DW |
1682 | resource_size_t size; |
1683 | ||
cd03412a | 1684 | if (nd_btt || nd_pfn || nd_dax) { |
0bfb8dd3 | 1685 | if (nd_btt) |
e1455744 | 1686 | ndns = nd_btt->ndns; |
0bfb8dd3 | 1687 | else if (nd_pfn) |
e1455744 | 1688 | ndns = nd_pfn->ndns; |
cd03412a DW |
1689 | else if (nd_dax) |
1690 | ndns = nd_dax->nd_pfn.ndns; | |
e1455744 | 1691 | |
0bfb8dd3 | 1692 | if (!ndns) |
8c2f7e86 DW |
1693 | return ERR_PTR(-ENODEV); |
1694 | ||
1695 | /* | |
1696 | * Flush any in-progess probes / removals in the driver | |
1697 | * for the raw personality of this namespace. | |
1698 | */ | |
1699 | device_lock(&ndns->dev); | |
1700 | device_unlock(&ndns->dev); | |
1701 | if (ndns->dev.driver) { | |
1702 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", | |
0bfb8dd3 | 1703 | dev_name(dev)); |
8c2f7e86 DW |
1704 | return ERR_PTR(-EBUSY); |
1705 | } | |
0bfb8dd3 | 1706 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
8c2f7e86 | 1707 | "host (%s) vs claim (%s) mismatch\n", |
0bfb8dd3 | 1708 | dev_name(dev), |
8c2f7e86 DW |
1709 | dev_name(ndns->claim))) |
1710 | return ERR_PTR(-ENXIO); | |
1711 | } else { | |
1712 | ndns = to_ndns(dev); | |
1713 | if (ndns->claim) { | |
1714 | dev_dbg(dev, "claimed by %s, failing probe\n", | |
1715 | dev_name(ndns->claim)); | |
1716 | ||
1717 | return ERR_PTR(-ENXIO); | |
1718 | } | |
1719 | } | |
1720 | ||
08e6b3c6 DW |
1721 | if (nvdimm_namespace_locked(ndns)) |
1722 | return ERR_PTR(-EACCES); | |
1723 | ||
8c2f7e86 DW |
1724 | size = nvdimm_namespace_capacity(ndns); |
1725 | if (size < ND_MIN_NAMESPACE_SIZE) { | |
1726 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", | |
1727 | &size, ND_MIN_NAMESPACE_SIZE); | |
1728 | return ERR_PTR(-ENODEV); | |
1729 | } | |
1730 | ||
1731 | if (is_namespace_pmem(&ndns->dev)) { | |
1732 | struct nd_namespace_pmem *nspm; | |
1733 | ||
1734 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
bd26d0d0 | 1735 | if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
8c2f7e86 | 1736 | return ERR_PTR(-ENODEV); |
8c2f7e86 | 1737 | } else if (is_namespace_blk(&ndns->dev)) { |
047fc8a1 RZ |
1738 | struct nd_namespace_blk *nsblk; |
1739 | ||
1740 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
bd26d0d0 DK |
1741 | if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__)) |
1742 | return ERR_PTR(-ENODEV); | |
1743 | if (!nsblk->lbasize) { | |
426824d6 | 1744 | dev_dbg(&ndns->dev, "sector size not set\n"); |
bd26d0d0 DK |
1745 | return ERR_PTR(-ENODEV); |
1746 | } | |
047fc8a1 RZ |
1747 | if (!nd_namespace_blk_validate(nsblk)) |
1748 | return ERR_PTR(-ENODEV); | |
8c2f7e86 DW |
1749 | } |
1750 | ||
1751 | return ndns; | |
1752 | } | |
1753 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); | |
1754 | ||
3d88002e DW |
1755 | static struct device **create_namespace_io(struct nd_region *nd_region) |
1756 | { | |
1757 | struct nd_namespace_io *nsio; | |
1758 | struct device *dev, **devs; | |
1759 | struct resource *res; | |
1760 | ||
1761 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); | |
1762 | if (!nsio) | |
1763 | return NULL; | |
1764 | ||
1765 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1766 | if (!devs) { | |
1767 | kfree(nsio); | |
1768 | return NULL; | |
1769 | } | |
1770 | ||
8c2f7e86 | 1771 | dev = &nsio->common.dev; |
3d88002e DW |
1772 | dev->type = &namespace_io_device_type; |
1773 | dev->parent = &nd_region->dev; | |
1774 | res = &nsio->res; | |
1775 | res->name = dev_name(&nd_region->dev); | |
1776 | res->flags = IORESOURCE_MEM; | |
1777 | res->start = nd_region->ndr_start; | |
1778 | res->end = res->start + nd_region->ndr_size - 1; | |
1779 | ||
1780 | devs[0] = dev; | |
1781 | return devs; | |
1782 | } | |
1783 | ||
bf9bccc1 DW |
1784 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
1785 | u64 cookie, u16 pos) | |
1786 | { | |
1787 | struct nd_namespace_label *found = NULL; | |
1788 | int i; | |
1789 | ||
1790 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1791 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
faec6f8a DW |
1792 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
1793 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
ae8219f1 | 1794 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1795 | bool found_uuid = false; |
bf9bccc1 | 1796 | |
ae8219f1 DW |
1797 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1798 | struct nd_namespace_label *nd_label = label_ent->label; | |
1799 | u16 position, nlabel; | |
1800 | u64 isetcookie; | |
1801 | ||
1802 | if (!nd_label) | |
1803 | continue; | |
1804 | isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1805 | position = __le16_to_cpu(nd_label->position); | |
1806 | nlabel = __le16_to_cpu(nd_label->nlabel); | |
bf9bccc1 DW |
1807 | |
1808 | if (isetcookie != cookie) | |
1809 | continue; | |
1810 | ||
1811 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1812 | continue; | |
1813 | ||
faec6f8a DW |
1814 | if (namespace_label_has(ndd, type_guid) |
1815 | && !guid_equal(&nd_set->type_guid, | |
1816 | &nd_label->type_guid)) { | |
1817 | dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", | |
1818 | nd_set->type_guid.b, | |
1819 | nd_label->type_guid.b); | |
1820 | continue; | |
1821 | } | |
1822 | ||
bf9bccc1 | 1823 | if (found_uuid) { |
426824d6 | 1824 | dev_dbg(ndd->dev, "duplicate entry for uuid\n"); |
bf9bccc1 DW |
1825 | return false; |
1826 | } | |
1827 | found_uuid = true; | |
1828 | if (nlabel != nd_region->ndr_mappings) | |
1829 | continue; | |
1830 | if (position != pos) | |
1831 | continue; | |
1832 | found = nd_label; | |
1833 | break; | |
1834 | } | |
1835 | if (found) | |
1836 | break; | |
1837 | } | |
1838 | return found != NULL; | |
1839 | } | |
1840 | ||
1841 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) | |
1842 | { | |
bf9bccc1 DW |
1843 | int i; |
1844 | ||
1845 | if (!pmem_id) | |
1846 | return -ENODEV; | |
1847 | ||
1848 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1849 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
0e3b0d12 | 1850 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
ae8219f1 | 1851 | struct nd_namespace_label *nd_label = NULL; |
bf9bccc1 | 1852 | u64 hw_start, hw_end, pmem_start, pmem_end; |
ae8219f1 | 1853 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1854 | |
9cf8bd52 | 1855 | lockdep_assert_held(&nd_mapping->lock); |
ae8219f1 DW |
1856 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1857 | nd_label = label_ent->label; | |
1858 | if (!nd_label) | |
1859 | continue; | |
bf9bccc1 DW |
1860 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
1861 | break; | |
ae8219f1 DW |
1862 | nd_label = NULL; |
1863 | } | |
bf9bccc1 DW |
1864 | |
1865 | if (!nd_label) { | |
1866 | WARN_ON(1); | |
1867 | return -EINVAL; | |
1868 | } | |
1869 | ||
bf9bccc1 DW |
1870 | /* |
1871 | * Check that this label is compliant with the dpa | |
1872 | * range published in NFIT | |
1873 | */ | |
1874 | hw_start = nd_mapping->start; | |
1875 | hw_end = hw_start + nd_mapping->size; | |
ae8219f1 DW |
1876 | pmem_start = __le64_to_cpu(nd_label->dpa); |
1877 | pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize); | |
0e3b0d12 DW |
1878 | if (pmem_start >= hw_start && pmem_start < hw_end |
1879 | && pmem_end <= hw_end && pmem_end > hw_start) | |
bf9bccc1 | 1880 | /* pass */; |
0e3b0d12 DW |
1881 | else { |
1882 | dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n", | |
1883 | dev_name(ndd->dev), nd_label->uuid); | |
bf9bccc1 | 1884 | return -EINVAL; |
0e3b0d12 | 1885 | } |
bf9bccc1 | 1886 | |
8a5f50d3 DW |
1887 | /* move recently validated label to the front of the list */ |
1888 | list_move(&label_ent->list, &nd_mapping->labels); | |
bf9bccc1 DW |
1889 | } |
1890 | return 0; | |
1891 | } | |
1892 | ||
1893 | /** | |
8a5f50d3 | 1894 | * create_namespace_pmem - validate interleave set labelling, retrieve label0 |
bf9bccc1 | 1895 | * @nd_region: region with mappings to validate |
8a5f50d3 DW |
1896 | * @nspm: target namespace to create |
1897 | * @nd_label: target pmem namespace label to evaluate | |
bf9bccc1 | 1898 | */ |
65853a1d | 1899 | static struct device *create_namespace_pmem(struct nd_region *nd_region, |
c12c48ce | 1900 | struct nd_namespace_index *nsindex, |
8a5f50d3 | 1901 | struct nd_namespace_label *nd_label) |
bf9bccc1 | 1902 | { |
c12c48ce | 1903 | u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
86ef58a4 | 1904 | u64 altcookie = nd_region_interleave_set_altcookie(nd_region); |
ae8219f1 | 1905 | struct nd_label_ent *label_ent; |
8a5f50d3 | 1906 | struct nd_namespace_pmem *nspm; |
ae8219f1 | 1907 | struct nd_mapping *nd_mapping; |
bf9bccc1 | 1908 | resource_size_t size = 0; |
8a5f50d3 DW |
1909 | struct resource *res; |
1910 | struct device *dev; | |
ae8219f1 | 1911 | int rc = 0; |
bf9bccc1 DW |
1912 | u16 i; |
1913 | ||
4765218d DW |
1914 | if (cookie == 0) { |
1915 | dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); | |
8a5f50d3 | 1916 | return ERR_PTR(-ENXIO); |
4765218d | 1917 | } |
bf9bccc1 | 1918 | |
8a5f50d3 DW |
1919 | if (__le64_to_cpu(nd_label->isetcookie) != cookie) { |
1920 | dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", | |
1921 | nd_label->uuid); | |
86ef58a4 DW |
1922 | if (__le64_to_cpu(nd_label->isetcookie) != altcookie) |
1923 | return ERR_PTR(-EAGAIN); | |
1924 | ||
1925 | dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n", | |
1926 | nd_label->uuid); | |
ae8219f1 | 1927 | } |
bf9bccc1 | 1928 | |
8a5f50d3 DW |
1929 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
1930 | if (!nspm) | |
1931 | return ERR_PTR(-ENOMEM); | |
ae8219f1 | 1932 | |
0e3b0d12 | 1933 | nspm->id = -1; |
8a5f50d3 DW |
1934 | dev = &nspm->nsio.common.dev; |
1935 | dev->type = &namespace_pmem_device_type; | |
1936 | dev->parent = &nd_region->dev; | |
1937 | res = &nspm->nsio.res; | |
1938 | res->name = dev_name(&nd_region->dev); | |
1939 | res->flags = IORESOURCE_MEM; | |
ae8219f1 | 1940 | |
86ef58a4 DW |
1941 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
1942 | if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) | |
1943 | continue; | |
1944 | if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i)) | |
1945 | continue; | |
1946 | break; | |
1947 | } | |
1948 | ||
8a5f50d3 | 1949 | if (i < nd_region->ndr_mappings) { |
4f867220 | 1950 | struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm; |
0e3b0d12 | 1951 | |
8a5f50d3 DW |
1952 | /* |
1953 | * Give up if we don't find an instance of a uuid at each | |
1954 | * position (from 0 to nd_region->ndr_mappings - 1), or if we | |
1955 | * find a dimm with two instances of the same uuid. | |
1956 | */ | |
0e3b0d12 | 1957 | dev_err(&nd_region->dev, "%s missing label for %pUb\n", |
4f867220 | 1958 | nvdimm_name(nvdimm), nd_label->uuid); |
8a5f50d3 | 1959 | rc = -EINVAL; |
ae8219f1 | 1960 | goto err; |
8a5f50d3 | 1961 | } |
bf9bccc1 DW |
1962 | |
1963 | /* | |
1964 | * Fix up each mapping's 'labels' to have the validated pmem label for | |
1965 | * that position at labels[0], and NULL at labels[1]. In the process, | |
1966 | * check that the namespace aligns with interleave-set. We know | |
1967 | * that it does not overlap with any blk namespaces by virtue of | |
1968 | * the dimm being enabled (i.e. nd_label_reserve_dpa() | |
1969 | * succeeded). | |
1970 | */ | |
8a5f50d3 | 1971 | rc = select_pmem_id(nd_region, nd_label->uuid); |
bf9bccc1 DW |
1972 | if (rc) |
1973 | goto err; | |
1974 | ||
1975 | /* Calculate total size and populate namespace properties from label0 */ | |
1976 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
ae8219f1 | 1977 | struct nd_namespace_label *label0; |
b3fde74e | 1978 | struct nvdimm_drvdata *ndd; |
ae8219f1 DW |
1979 | |
1980 | nd_mapping = &nd_region->mapping[i]; | |
ae8219f1 DW |
1981 | label_ent = list_first_entry_or_null(&nd_mapping->labels, |
1982 | typeof(*label_ent), list); | |
1983 | label0 = label_ent ? label_ent->label : 0; | |
ae8219f1 DW |
1984 | |
1985 | if (!label0) { | |
1986 | WARN_ON(1); | |
1987 | continue; | |
1988 | } | |
bf9bccc1 DW |
1989 | |
1990 | size += __le64_to_cpu(label0->rawsize); | |
1991 | if (__le16_to_cpu(label0->position) != 0) | |
1992 | continue; | |
1993 | WARN_ON(nspm->alt_name || nspm->uuid); | |
1994 | nspm->alt_name = kmemdup((void __force *) label0->name, | |
1995 | NSLABEL_NAME_LEN, GFP_KERNEL); | |
1996 | nspm->uuid = kmemdup((void __force *) label0->uuid, | |
1997 | NSLABEL_UUID_LEN, GFP_KERNEL); | |
f979b13c | 1998 | nspm->lbasize = __le64_to_cpu(label0->lbasize); |
b3fde74e DW |
1999 | ndd = to_ndd(nd_mapping); |
2000 | if (namespace_label_has(ndd, abstraction_guid)) | |
2001 | nspm->nsio.common.claim_class | |
2002 | = to_nvdimm_cclass(&label0->abstraction_guid); | |
2003 | ||
bf9bccc1 DW |
2004 | } |
2005 | ||
2006 | if (!nspm->alt_name || !nspm->uuid) { | |
2007 | rc = -ENOMEM; | |
2008 | goto err; | |
2009 | } | |
2010 | ||
0e3b0d12 | 2011 | nd_namespace_pmem_set_resource(nd_region, nspm, size); |
bf9bccc1 | 2012 | |
8a5f50d3 | 2013 | return dev; |
bf9bccc1 | 2014 | err: |
8a5f50d3 | 2015 | namespace_pmem_release(dev); |
bf9bccc1 DW |
2016 | switch (rc) { |
2017 | case -EINVAL: | |
426824d6 | 2018 | dev_dbg(&nd_region->dev, "invalid label(s)\n"); |
bf9bccc1 DW |
2019 | break; |
2020 | case -ENODEV: | |
426824d6 | 2021 | dev_dbg(&nd_region->dev, "label not found\n"); |
bf9bccc1 DW |
2022 | break; |
2023 | default: | |
426824d6 | 2024 | dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc); |
bf9bccc1 DW |
2025 | break; |
2026 | } | |
8a5f50d3 | 2027 | return ERR_PTR(rc); |
bf9bccc1 DW |
2028 | } |
2029 | ||
1b40e09a DW |
2030 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
2031 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, | |
2032 | resource_size_t start) | |
2033 | { | |
2034 | struct nd_label_id label_id; | |
2035 | struct resource *res; | |
2036 | ||
2037 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
2038 | res = krealloc(nsblk->res, | |
2039 | sizeof(void *) * (nsblk->num_resources + 1), | |
2040 | GFP_KERNEL); | |
2041 | if (!res) | |
2042 | return NULL; | |
2043 | nsblk->res = (struct resource **) res; | |
2044 | for_each_dpa_resource(ndd, res) | |
2045 | if (strcmp(res->name, label_id.id) == 0 | |
2046 | && res->start == start) { | |
2047 | nsblk->res[nsblk->num_resources++] = res; | |
2048 | return res; | |
2049 | } | |
2050 | return NULL; | |
2051 | } | |
2052 | ||
2053 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) | |
2054 | { | |
2055 | struct nd_namespace_blk *nsblk; | |
2056 | struct device *dev; | |
2057 | ||
2058 | if (!is_nd_blk(&nd_region->dev)) | |
2059 | return NULL; | |
2060 | ||
2061 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2062 | if (!nsblk) | |
2063 | return NULL; | |
2064 | ||
8c2f7e86 | 2065 | dev = &nsblk->common.dev; |
1b40e09a DW |
2066 | dev->type = &namespace_blk_device_type; |
2067 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
2068 | if (nsblk->id < 0) { | |
2069 | kfree(nsblk); | |
2070 | return NULL; | |
2071 | } | |
2072 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); | |
2073 | dev->parent = &nd_region->dev; | |
2074 | dev->groups = nd_namespace_attribute_groups; | |
2075 | ||
8c2f7e86 | 2076 | return &nsblk->common.dev; |
1b40e09a DW |
2077 | } |
2078 | ||
98a29c39 DW |
2079 | static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) |
2080 | { | |
2081 | struct nd_namespace_pmem *nspm; | |
2082 | struct resource *res; | |
2083 | struct device *dev; | |
2084 | ||
c9e582aa | 2085 | if (!is_memory(&nd_region->dev)) |
98a29c39 DW |
2086 | return NULL; |
2087 | ||
2088 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2089 | if (!nspm) | |
2090 | return NULL; | |
2091 | ||
2092 | dev = &nspm->nsio.common.dev; | |
2093 | dev->type = &namespace_pmem_device_type; | |
2094 | dev->parent = &nd_region->dev; | |
2095 | res = &nspm->nsio.res; | |
2096 | res->name = dev_name(&nd_region->dev); | |
2097 | res->flags = IORESOURCE_MEM; | |
2098 | ||
2099 | nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
2100 | if (nspm->id < 0) { | |
2101 | kfree(nspm); | |
2102 | return NULL; | |
2103 | } | |
2104 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id); | |
98a29c39 DW |
2105 | dev->groups = nd_namespace_attribute_groups; |
2106 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); | |
2107 | ||
2108 | return dev; | |
2109 | } | |
2110 | ||
2111 | void nd_region_create_ns_seed(struct nd_region *nd_region) | |
1b40e09a DW |
2112 | { |
2113 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
98a29c39 DW |
2114 | |
2115 | if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) | |
2116 | return; | |
2117 | ||
2118 | if (is_nd_blk(&nd_region->dev)) | |
2119 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); | |
2120 | else | |
2121 | nd_region->ns_seed = nd_namespace_pmem_create(nd_region); | |
2122 | ||
1b40e09a DW |
2123 | /* |
2124 | * Seed creation failures are not fatal, provisioning is simply | |
2125 | * disabled until memory becomes available | |
2126 | */ | |
2127 | if (!nd_region->ns_seed) | |
98a29c39 DW |
2128 | dev_err(&nd_region->dev, "failed to create %s namespace\n", |
2129 | is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); | |
1b40e09a DW |
2130 | else |
2131 | nd_device_register(nd_region->ns_seed); | |
2132 | } | |
2133 | ||
cd03412a DW |
2134 | void nd_region_create_dax_seed(struct nd_region *nd_region) |
2135 | { | |
2136 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2137 | nd_region->dax_seed = nd_dax_create(nd_region); | |
2138 | /* | |
2139 | * Seed creation failures are not fatal, provisioning is simply | |
2140 | * disabled until memory becomes available | |
2141 | */ | |
2142 | if (!nd_region->dax_seed) | |
2143 | dev_err(&nd_region->dev, "failed to create dax namespace\n"); | |
2144 | } | |
2145 | ||
2dc43331 DW |
2146 | void nd_region_create_pfn_seed(struct nd_region *nd_region) |
2147 | { | |
2148 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2149 | nd_region->pfn_seed = nd_pfn_create(nd_region); | |
2150 | /* | |
2151 | * Seed creation failures are not fatal, provisioning is simply | |
2152 | * disabled until memory becomes available | |
2153 | */ | |
2154 | if (!nd_region->pfn_seed) | |
2155 | dev_err(&nd_region->dev, "failed to create pfn namespace\n"); | |
2156 | } | |
2157 | ||
8c2f7e86 DW |
2158 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
2159 | { | |
2160 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2161 | nd_region->btt_seed = nd_btt_create(nd_region); | |
2162 | /* | |
2163 | * Seed creation failures are not fatal, provisioning is simply | |
2164 | * disabled until memory becomes available | |
2165 | */ | |
2166 | if (!nd_region->btt_seed) | |
2167 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); | |
2168 | } | |
2169 | ||
8a5f50d3 DW |
2170 | static int add_namespace_resource(struct nd_region *nd_region, |
2171 | struct nd_namespace_label *nd_label, struct device **devs, | |
2172 | int count) | |
1b40e09a | 2173 | { |
8a5f50d3 DW |
2174 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
2175 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2176 | int i; | |
2177 | ||
2178 | for (i = 0; i < count; i++) { | |
2179 | u8 *uuid = namespace_to_uuid(devs[i]); | |
2180 | struct resource *res; | |
2181 | ||
2182 | if (IS_ERR_OR_NULL(uuid)) { | |
2183 | WARN_ON(1); | |
2184 | continue; | |
2185 | } | |
2186 | ||
2187 | if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0) | |
2188 | continue; | |
2189 | if (is_namespace_blk(devs[i])) { | |
2190 | res = nsblk_add_resource(nd_region, ndd, | |
2191 | to_nd_namespace_blk(devs[i]), | |
2192 | __le64_to_cpu(nd_label->dpa)); | |
2193 | if (!res) | |
2194 | return -ENXIO; | |
2195 | nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count); | |
2196 | } else { | |
2197 | dev_err(&nd_region->dev, | |
2198 | "error: conflicting extents for uuid: %pUb\n", | |
2199 | nd_label->uuid); | |
2200 | return -ENXIO; | |
2201 | } | |
2202 | break; | |
2203 | } | |
2204 | ||
2205 | return i; | |
2206 | } | |
2207 | ||
65853a1d | 2208 | static struct device *create_namespace_blk(struct nd_region *nd_region, |
8a5f50d3 DW |
2209 | struct nd_namespace_label *nd_label, int count) |
2210 | { | |
2211 | ||
2212 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
faec6f8a | 2213 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
ae8219f1 | 2214 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1b40e09a | 2215 | struct nd_namespace_blk *nsblk; |
238b323a | 2216 | char name[NSLABEL_NAME_LEN]; |
8a5f50d3 DW |
2217 | struct device *dev = NULL; |
2218 | struct resource *res; | |
2219 | ||
8f2bc243 DW |
2220 | if (namespace_label_has(ndd, type_guid)) { |
2221 | if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) { | |
2222 | dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", | |
2223 | nd_set->type_guid.b, | |
2224 | nd_label->type_guid.b); | |
2225 | return ERR_PTR(-EAGAIN); | |
2226 | } | |
2227 | ||
2228 | if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) { | |
2229 | dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", | |
2230 | nd_set->cookie2, | |
2231 | __le64_to_cpu(nd_label->isetcookie)); | |
2232 | return ERR_PTR(-EAGAIN); | |
2233 | } | |
faec6f8a DW |
2234 | } |
2235 | ||
8a5f50d3 DW |
2236 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
2237 | if (!nsblk) | |
2238 | return ERR_PTR(-ENOMEM); | |
2239 | dev = &nsblk->common.dev; | |
2240 | dev->type = &namespace_blk_device_type; | |
2241 | dev->parent = &nd_region->dev; | |
2242 | nsblk->id = -1; | |
2243 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); | |
2244 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, | |
2245 | GFP_KERNEL); | |
b3fde74e DW |
2246 | if (namespace_label_has(ndd, abstraction_guid)) |
2247 | nsblk->common.claim_class | |
2248 | = to_nvdimm_cclass(&nd_label->abstraction_guid); | |
8a5f50d3 DW |
2249 | if (!nsblk->uuid) |
2250 | goto blk_err; | |
2251 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); | |
2252 | if (name[0]) | |
2253 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, | |
2254 | GFP_KERNEL); | |
2255 | res = nsblk_add_resource(nd_region, ndd, nsblk, | |
2256 | __le64_to_cpu(nd_label->dpa)); | |
2257 | if (!res) | |
2258 | goto blk_err; | |
2259 | nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count); | |
2260 | return dev; | |
2261 | blk_err: | |
2262 | namespace_blk_release(dev); | |
2263 | return ERR_PTR(-ENXIO); | |
2264 | } | |
2265 | ||
6ff3e912 DW |
2266 | static int cmp_dpa(const void *a, const void *b) |
2267 | { | |
2268 | const struct device *dev_a = *(const struct device **) a; | |
2269 | const struct device *dev_b = *(const struct device **) b; | |
2270 | struct nd_namespace_blk *nsblk_a, *nsblk_b; | |
2271 | struct nd_namespace_pmem *nspm_a, *nspm_b; | |
2272 | ||
2273 | if (is_namespace_io(dev_a)) | |
2274 | return 0; | |
2275 | ||
2276 | if (is_namespace_blk(dev_a)) { | |
2277 | nsblk_a = to_nd_namespace_blk(dev_a); | |
2278 | nsblk_b = to_nd_namespace_blk(dev_b); | |
2279 | ||
2280 | return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start, | |
2281 | sizeof(resource_size_t)); | |
2282 | } | |
2283 | ||
2284 | nspm_a = to_nd_namespace_pmem(dev_a); | |
2285 | nspm_b = to_nd_namespace_pmem(dev_b); | |
2286 | ||
2287 | return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start, | |
2288 | sizeof(resource_size_t)); | |
2289 | } | |
2290 | ||
8a5f50d3 DW |
2291 | static struct device **scan_labels(struct nd_region *nd_region) |
2292 | { | |
c969e24c | 2293 | int i, count = 0; |
8a5f50d3 DW |
2294 | struct device *dev, **devs = NULL; |
2295 | struct nd_label_ent *label_ent, *e; | |
c969e24c DW |
2296 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
2297 | resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; | |
1b40e09a | 2298 | |
8a5f50d3 DW |
2299 | /* "safe" because create_namespace_pmem() might list_move() label_ent */ |
2300 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
ae8219f1 | 2301 | struct nd_namespace_label *nd_label = label_ent->label; |
1b40e09a | 2302 | struct device **__devs; |
ae8219f1 | 2303 | u32 flags; |
1b40e09a | 2304 | |
ae8219f1 DW |
2305 | if (!nd_label) |
2306 | continue; | |
2307 | flags = __le32_to_cpu(nd_label->flags); | |
8a5f50d3 DW |
2308 | if (is_nd_blk(&nd_region->dev) |
2309 | == !!(flags & NSLABEL_FLAG_LOCAL)) | |
2310 | /* pass, region matches label type */; | |
1b40e09a DW |
2311 | else |
2312 | continue; | |
2313 | ||
c969e24c DW |
2314 | /* skip labels that describe extents outside of the region */ |
2315 | if (nd_label->dpa < nd_mapping->start || nd_label->dpa > map_end) | |
2316 | continue; | |
2317 | ||
8a5f50d3 DW |
2318 | i = add_namespace_resource(nd_region, nd_label, devs, count); |
2319 | if (i < 0) | |
2320 | goto err; | |
1b40e09a DW |
2321 | if (i < count) |
2322 | continue; | |
2323 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); | |
2324 | if (!__devs) | |
2325 | goto err; | |
2326 | memcpy(__devs, devs, sizeof(dev) * count); | |
2327 | kfree(devs); | |
2328 | devs = __devs; | |
2329 | ||
faec6f8a | 2330 | if (is_nd_blk(&nd_region->dev)) |
8a5f50d3 | 2331 | dev = create_namespace_blk(nd_region, nd_label, count); |
faec6f8a | 2332 | else { |
c12c48ce DW |
2333 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
2334 | struct nd_namespace_index *nsindex; | |
2335 | ||
2336 | nsindex = to_namespace_index(ndd, ndd->ns_current); | |
2337 | dev = create_namespace_pmem(nd_region, nsindex, nd_label); | |
8a5f50d3 | 2338 | } |
faec6f8a DW |
2339 | |
2340 | if (IS_ERR(dev)) { | |
2341 | switch (PTR_ERR(dev)) { | |
2342 | case -EAGAIN: | |
2343 | /* skip invalid labels */ | |
2344 | continue; | |
2345 | case -ENODEV: | |
2346 | /* fallthrough to seed creation */ | |
2347 | break; | |
2348 | default: | |
2349 | goto err; | |
2350 | } | |
2351 | } else | |
2352 | devs[count++] = dev; | |
2353 | ||
1b40e09a DW |
2354 | } |
2355 | ||
426824d6 DW |
2356 | dev_dbg(&nd_region->dev, "discovered %d %s namespace%s\n", |
2357 | count, is_nd_blk(&nd_region->dev) | |
8a5f50d3 | 2358 | ? "blk" : "pmem", count == 1 ? "" : "s"); |
1b40e09a DW |
2359 | |
2360 | if (count == 0) { | |
2361 | /* Publish a zero-sized namespace for userspace to configure. */ | |
ae8219f1 | 2362 | nd_mapping_free_labels(nd_mapping); |
1b40e09a DW |
2363 | |
2364 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); | |
2365 | if (!devs) | |
2366 | goto err; | |
8a5f50d3 DW |
2367 | if (is_nd_blk(&nd_region->dev)) { |
2368 | struct nd_namespace_blk *nsblk; | |
2369 | ||
2370 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2371 | if (!nsblk) | |
2372 | goto err; | |
2373 | dev = &nsblk->common.dev; | |
2374 | dev->type = &namespace_blk_device_type; | |
2375 | } else { | |
2376 | struct nd_namespace_pmem *nspm; | |
2377 | ||
2378 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2379 | if (!nspm) | |
2380 | goto err; | |
2381 | dev = &nspm->nsio.common.dev; | |
2382 | dev->type = &namespace_pmem_device_type; | |
0e3b0d12 | 2383 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
8a5f50d3 | 2384 | } |
1b40e09a DW |
2385 | dev->parent = &nd_region->dev; |
2386 | devs[count++] = dev; | |
c9e582aa | 2387 | } else if (is_memory(&nd_region->dev)) { |
8a5f50d3 DW |
2388 | /* clean unselected labels */ |
2389 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
0e3b0d12 DW |
2390 | struct list_head *l, *e; |
2391 | LIST_HEAD(list); | |
2392 | int j; | |
2393 | ||
8a5f50d3 DW |
2394 | nd_mapping = &nd_region->mapping[i]; |
2395 | if (list_empty(&nd_mapping->labels)) { | |
2396 | WARN_ON(1); | |
2397 | continue; | |
2398 | } | |
0e3b0d12 DW |
2399 | |
2400 | j = count; | |
2401 | list_for_each_safe(l, e, &nd_mapping->labels) { | |
2402 | if (!j--) | |
2403 | break; | |
2404 | list_move_tail(l, &list); | |
2405 | } | |
8a5f50d3 | 2406 | nd_mapping_free_labels(nd_mapping); |
0e3b0d12 | 2407 | list_splice_init(&list, &nd_mapping->labels); |
8a5f50d3 | 2408 | } |
1b40e09a DW |
2409 | } |
2410 | ||
6ff3e912 DW |
2411 | if (count > 1) |
2412 | sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); | |
2413 | ||
1b40e09a DW |
2414 | return devs; |
2415 | ||
ae8219f1 | 2416 | err: |
75d29713 DC |
2417 | if (devs) { |
2418 | for (i = 0; devs[i]; i++) | |
2419 | if (is_nd_blk(&nd_region->dev)) | |
2420 | namespace_blk_release(devs[i]); | |
2421 | else | |
2422 | namespace_pmem_release(devs[i]); | |
2423 | kfree(devs); | |
2424 | } | |
1b40e09a DW |
2425 | return NULL; |
2426 | } | |
2427 | ||
8a5f50d3 | 2428 | static struct device **create_namespaces(struct nd_region *nd_region) |
ae8219f1 | 2429 | { |
59858d3d | 2430 | struct nd_mapping *nd_mapping; |
ae8219f1 | 2431 | struct device **devs; |
8a5f50d3 | 2432 | int i; |
ae8219f1 DW |
2433 | |
2434 | if (nd_region->ndr_mappings == 0) | |
2435 | return NULL; | |
2436 | ||
8a5f50d3 DW |
2437 | /* lock down all mappings while we scan labels */ |
2438 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2439 | nd_mapping = &nd_region->mapping[i]; | |
2440 | mutex_lock_nested(&nd_mapping->lock, i); | |
2441 | } | |
2442 | ||
2443 | devs = scan_labels(nd_region); | |
2444 | ||
2445 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2446 | int reverse = nd_region->ndr_mappings - 1 - i; | |
2447 | ||
2448 | nd_mapping = &nd_region->mapping[reverse]; | |
2449 | mutex_unlock(&nd_mapping->lock); | |
2450 | } | |
ae8219f1 DW |
2451 | |
2452 | return devs; | |
2453 | } | |
2454 | ||
bf9bccc1 DW |
2455 | static int init_active_labels(struct nd_region *nd_region) |
2456 | { | |
2457 | int i; | |
2458 | ||
2459 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2460 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
2461 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2462 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
ae8219f1 | 2463 | struct nd_label_ent *label_ent; |
bf9bccc1 DW |
2464 | int count, j; |
2465 | ||
2466 | /* | |
9d62ed96 DW |
2467 | * If the dimm is disabled then we may need to prevent |
2468 | * the region from being activated. | |
bf9bccc1 DW |
2469 | */ |
2470 | if (!ndd) { | |
9d62ed96 DW |
2471 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) |
2472 | /* fail, label data may be unreadable */; | |
2473 | else if (test_bit(NDD_ALIASING, &nvdimm->flags)) | |
2474 | /* fail, labels needed to disambiguate dpa */; | |
2475 | else | |
bf9bccc1 | 2476 | return 0; |
9d62ed96 DW |
2477 | |
2478 | dev_err(&nd_region->dev, "%s: is %s, failing probe\n", | |
2479 | dev_name(&nd_mapping->nvdimm->dev), | |
2480 | test_bit(NDD_LOCKED, &nvdimm->flags) | |
2481 | ? "locked" : "disabled"); | |
bf9bccc1 DW |
2482 | return -ENXIO; |
2483 | } | |
2484 | nd_mapping->ndd = ndd; | |
2485 | atomic_inc(&nvdimm->busy); | |
2486 | get_ndd(ndd); | |
2487 | ||
2488 | count = nd_label_active_count(ndd); | |
426824d6 | 2489 | dev_dbg(ndd->dev, "count: %d\n", count); |
bf9bccc1 DW |
2490 | if (!count) |
2491 | continue; | |
bf9bccc1 DW |
2492 | for (j = 0; j < count; j++) { |
2493 | struct nd_namespace_label *label; | |
2494 | ||
ae8219f1 DW |
2495 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); |
2496 | if (!label_ent) | |
2497 | break; | |
bf9bccc1 | 2498 | label = nd_label_active(ndd, j); |
d5d30d5a DW |
2499 | if (test_bit(NDD_NOBLK, &nvdimm->flags)) { |
2500 | u32 flags = __le32_to_cpu(label->flags); | |
2501 | ||
2502 | flags &= ~NSLABEL_FLAG_LOCAL; | |
2503 | label->flags = __cpu_to_le32(flags); | |
2504 | } | |
ae8219f1 DW |
2505 | label_ent->label = label; |
2506 | ||
2507 | mutex_lock(&nd_mapping->lock); | |
2508 | list_add_tail(&label_ent->list, &nd_mapping->labels); | |
2509 | mutex_unlock(&nd_mapping->lock); | |
bf9bccc1 | 2510 | } |
ae8219f1 DW |
2511 | |
2512 | if (j >= count) | |
2513 | continue; | |
2514 | ||
2515 | mutex_lock(&nd_mapping->lock); | |
2516 | nd_mapping_free_labels(nd_mapping); | |
2517 | mutex_unlock(&nd_mapping->lock); | |
2518 | return -ENOMEM; | |
bf9bccc1 DW |
2519 | } |
2520 | ||
2521 | return 0; | |
2522 | } | |
2523 | ||
3d88002e DW |
2524 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
2525 | { | |
2526 | struct device **devs = NULL; | |
bf9bccc1 | 2527 | int i, rc = 0, type; |
3d88002e DW |
2528 | |
2529 | *err = 0; | |
bf9bccc1 DW |
2530 | nvdimm_bus_lock(&nd_region->dev); |
2531 | rc = init_active_labels(nd_region); | |
2532 | if (rc) { | |
2533 | nvdimm_bus_unlock(&nd_region->dev); | |
2534 | return rc; | |
2535 | } | |
2536 | ||
2537 | type = nd_region_to_nstype(nd_region); | |
2538 | switch (type) { | |
3d88002e DW |
2539 | case ND_DEVICE_NAMESPACE_IO: |
2540 | devs = create_namespace_io(nd_region); | |
2541 | break; | |
bf9bccc1 | 2542 | case ND_DEVICE_NAMESPACE_PMEM: |
1b40e09a | 2543 | case ND_DEVICE_NAMESPACE_BLK: |
8a5f50d3 | 2544 | devs = create_namespaces(nd_region); |
1b40e09a | 2545 | break; |
3d88002e DW |
2546 | default: |
2547 | break; | |
2548 | } | |
bf9bccc1 | 2549 | nvdimm_bus_unlock(&nd_region->dev); |
3d88002e DW |
2550 | |
2551 | if (!devs) | |
2552 | return -ENODEV; | |
2553 | ||
2554 | for (i = 0; devs[i]; i++) { | |
2555 | struct device *dev = devs[i]; | |
1b40e09a | 2556 | int id; |
3d88002e | 2557 | |
1b40e09a DW |
2558 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
2559 | struct nd_namespace_blk *nsblk; | |
2560 | ||
2561 | nsblk = to_nd_namespace_blk(dev); | |
2562 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2563 | GFP_KERNEL); | |
2564 | nsblk->id = id; | |
0e3b0d12 DW |
2565 | } else if (type == ND_DEVICE_NAMESPACE_PMEM) { |
2566 | struct nd_namespace_pmem *nspm; | |
2567 | ||
2568 | nspm = to_nd_namespace_pmem(dev); | |
2569 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2570 | GFP_KERNEL); | |
2571 | nspm->id = id; | |
1b40e09a DW |
2572 | } else |
2573 | id = i; | |
2574 | ||
2575 | if (id < 0) | |
2576 | break; | |
2577 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); | |
3d88002e DW |
2578 | dev->groups = nd_namespace_attribute_groups; |
2579 | nd_device_register(dev); | |
2580 | } | |
1b40e09a DW |
2581 | if (i) |
2582 | nd_region->ns_seed = devs[0]; | |
2583 | ||
2584 | if (devs[i]) { | |
2585 | int j; | |
2586 | ||
2587 | for (j = i; devs[j]; j++) { | |
2588 | struct device *dev = devs[j]; | |
2589 | ||
2590 | device_initialize(dev); | |
2591 | put_device(dev); | |
2592 | } | |
2593 | *err = j - i; | |
2594 | /* | |
2595 | * All of the namespaces we tried to register failed, so | |
2596 | * fail region activation. | |
2597 | */ | |
2598 | if (*err == 0) | |
2599 | rc = -ENODEV; | |
2600 | } | |
3d88002e DW |
2601 | kfree(devs); |
2602 | ||
1b40e09a DW |
2603 | if (rc == -ENODEV) |
2604 | return rc; | |
2605 | ||
3d88002e DW |
2606 | return i; |
2607 | } |