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