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5b497af4 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
3d88002e DW |
2 | /* |
3 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
3d88002e DW |
4 | */ |
5 | #include <linux/module.h> | |
6 | #include <linux/device.h> | |
6ff3e912 | 7 | #include <linux/sort.h> |
3d88002e | 8 | #include <linux/slab.h> |
ae8219f1 | 9 | #include <linux/list.h> |
3d88002e | 10 | #include <linux/nd.h> |
bf9bccc1 | 11 | #include "nd-core.h" |
ca6a4657 | 12 | #include "pmem.h" |
3d88002e DW |
13 | #include "nd.h" |
14 | ||
15 | static void namespace_io_release(struct device *dev) | |
16 | { | |
17 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
18 | ||
19 | kfree(nsio); | |
20 | } | |
21 | ||
bf9bccc1 DW |
22 | static void namespace_pmem_release(struct device *dev) |
23 | { | |
24 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0e3b0d12 | 25 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 | 26 | |
0e3b0d12 DW |
27 | if (nspm->id >= 0) |
28 | ida_simple_remove(&nd_region->ns_ida, nspm->id); | |
bf9bccc1 DW |
29 | kfree(nspm->alt_name); |
30 | kfree(nspm->uuid); | |
31 | kfree(nspm); | |
32 | } | |
33 | ||
34 | static void namespace_blk_release(struct device *dev) | |
35 | { | |
1b40e09a DW |
36 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
37 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
38 | ||
39 | if (nsblk->id >= 0) | |
40 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); | |
41 | kfree(nsblk->alt_name); | |
42 | kfree(nsblk->uuid); | |
43 | kfree(nsblk->res); | |
44 | kfree(nsblk); | |
bf9bccc1 DW |
45 | } |
46 | ||
970d14e3 | 47 | static const struct device_type namespace_io_device_type = { |
3d88002e DW |
48 | .name = "nd_namespace_io", |
49 | .release = namespace_io_release, | |
50 | }; | |
51 | ||
970d14e3 | 52 | static const struct device_type namespace_pmem_device_type = { |
bf9bccc1 DW |
53 | .name = "nd_namespace_pmem", |
54 | .release = namespace_pmem_release, | |
55 | }; | |
56 | ||
970d14e3 | 57 | static const struct device_type namespace_blk_device_type = { |
bf9bccc1 DW |
58 | .name = "nd_namespace_blk", |
59 | .release = namespace_blk_release, | |
60 | }; | |
61 | ||
6ff3e912 | 62 | static bool is_namespace_pmem(const struct device *dev) |
bf9bccc1 DW |
63 | { |
64 | return dev ? dev->type == &namespace_pmem_device_type : false; | |
65 | } | |
66 | ||
6ff3e912 | 67 | static bool is_namespace_blk(const struct device *dev) |
bf9bccc1 DW |
68 | { |
69 | return dev ? dev->type == &namespace_blk_device_type : false; | |
70 | } | |
71 | ||
6ff3e912 | 72 | static bool is_namespace_io(const struct device *dev) |
bf9bccc1 DW |
73 | { |
74 | return dev ? dev->type == &namespace_io_device_type : false; | |
75 | } | |
76 | ||
e07ecd76 DW |
77 | static int is_uuid_busy(struct device *dev, void *data) |
78 | { | |
79 | u8 *uuid1 = data, *uuid2 = NULL; | |
80 | ||
81 | if (is_namespace_pmem(dev)) { | |
82 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
83 | ||
84 | uuid2 = nspm->uuid; | |
85 | } else if (is_namespace_blk(dev)) { | |
86 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
87 | ||
88 | uuid2 = nsblk->uuid; | |
89 | } else if (is_nd_btt(dev)) { | |
90 | struct nd_btt *nd_btt = to_nd_btt(dev); | |
91 | ||
92 | uuid2 = nd_btt->uuid; | |
93 | } else if (is_nd_pfn(dev)) { | |
94 | struct nd_pfn *nd_pfn = to_nd_pfn(dev); | |
95 | ||
96 | uuid2 = nd_pfn->uuid; | |
97 | } | |
98 | ||
99 | if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0) | |
100 | return -EBUSY; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static int is_namespace_uuid_busy(struct device *dev, void *data) | |
106 | { | |
c9e582aa | 107 | if (is_nd_region(dev)) |
e07ecd76 DW |
108 | return device_for_each_child(dev, data, is_uuid_busy); |
109 | return 0; | |
110 | } | |
111 | ||
112 | /** | |
113 | * nd_is_uuid_unique - verify that no other namespace has @uuid | |
114 | * @dev: any device on a nvdimm_bus | |
115 | * @uuid: uuid to check | |
116 | */ | |
117 | bool nd_is_uuid_unique(struct device *dev, u8 *uuid) | |
118 | { | |
119 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
120 | ||
121 | if (!nvdimm_bus) | |
122 | return false; | |
123 | WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev)); | |
124 | if (device_for_each_child(&nvdimm_bus->dev, uuid, | |
125 | is_namespace_uuid_busy) != 0) | |
126 | return false; | |
127 | return true; | |
128 | } | |
129 | ||
004f1afb DW |
130 | bool pmem_should_map_pages(struct device *dev) |
131 | { | |
132 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
fa7d2e63 | 133 | struct nd_namespace_common *ndns = to_ndns(dev); |
cfe30b87 | 134 | struct nd_namespace_io *nsio; |
004f1afb DW |
135 | |
136 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) | |
137 | return false; | |
138 | ||
139 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) | |
140 | return false; | |
141 | ||
142 | if (is_nd_pfn(dev) || is_nd_btt(dev)) | |
143 | return false; | |
144 | ||
fa7d2e63 DW |
145 | if (ndns->force_raw) |
146 | return false; | |
147 | ||
cfe30b87 DW |
148 | nsio = to_nd_namespace_io(dev); |
149 | if (region_intersects(nsio->res.start, resource_size(&nsio->res), | |
150 | IORESOURCE_SYSTEM_RAM, | |
151 | IORES_DESC_NONE) == REGION_MIXED) | |
152 | return false; | |
153 | ||
004f1afb | 154 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; |
004f1afb DW |
155 | } |
156 | EXPORT_SYMBOL(pmem_should_map_pages); | |
157 | ||
f979b13c DW |
158 | unsigned int pmem_sector_size(struct nd_namespace_common *ndns) |
159 | { | |
160 | if (is_namespace_pmem(&ndns->dev)) { | |
161 | struct nd_namespace_pmem *nspm; | |
162 | ||
163 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
164 | if (nspm->lbasize == 0 || nspm->lbasize == 512) | |
165 | /* default */; | |
166 | else if (nspm->lbasize == 4096) | |
167 | return 4096; | |
168 | else | |
169 | dev_WARN(&ndns->dev, "unsupported sector size: %ld\n", | |
170 | nspm->lbasize); | |
171 | } | |
172 | ||
173 | /* | |
174 | * There is no namespace label (is_namespace_io()), or the label | |
175 | * indicates the default sector size. | |
176 | */ | |
177 | return 512; | |
178 | } | |
179 | EXPORT_SYMBOL(pmem_sector_size); | |
180 | ||
5212e11f VV |
181 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
182 | char *name) | |
183 | { | |
184 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
004f1afb | 185 | const char *suffix = NULL; |
5212e11f | 186 | |
0731de0d DW |
187 | if (ndns->claim && is_nd_btt(ndns->claim)) |
188 | suffix = "s"; | |
5212e11f | 189 | |
004f1afb | 190 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
01220733 DW |
191 | int nsidx = 0; |
192 | ||
193 | if (is_namespace_pmem(&ndns->dev)) { | |
194 | struct nd_namespace_pmem *nspm; | |
195 | ||
196 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
197 | nsidx = nspm->id; | |
198 | } | |
199 | ||
200 | if (nsidx) | |
201 | sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, | |
202 | suffix ? suffix : ""); | |
203 | else | |
204 | sprintf(name, "pmem%d%s", nd_region->id, | |
205 | suffix ? suffix : ""); | |
004f1afb | 206 | } else if (is_namespace_blk(&ndns->dev)) { |
5212e11f VV |
207 | struct nd_namespace_blk *nsblk; |
208 | ||
209 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
004f1afb DW |
210 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, |
211 | suffix ? suffix : ""); | |
5212e11f VV |
212 | } else { |
213 | return NULL; | |
214 | } | |
215 | ||
216 | return name; | |
217 | } | |
218 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); | |
219 | ||
6ec68954 VV |
220 | const u8 *nd_dev_to_uuid(struct device *dev) |
221 | { | |
222 | static const u8 null_uuid[16]; | |
223 | ||
224 | if (!dev) | |
225 | return null_uuid; | |
226 | ||
227 | if (is_namespace_pmem(dev)) { | |
228 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
229 | ||
230 | return nspm->uuid; | |
231 | } else if (is_namespace_blk(dev)) { | |
232 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
233 | ||
234 | return nsblk->uuid; | |
235 | } else | |
236 | return null_uuid; | |
237 | } | |
238 | EXPORT_SYMBOL(nd_dev_to_uuid); | |
239 | ||
3d88002e DW |
240 | static ssize_t nstype_show(struct device *dev, |
241 | struct device_attribute *attr, char *buf) | |
242 | { | |
243 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
244 | ||
245 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); | |
246 | } | |
247 | static DEVICE_ATTR_RO(nstype); | |
248 | ||
bf9bccc1 DW |
249 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
250 | const size_t len) | |
251 | { | |
252 | char *input, *pos, *alt_name, **ns_altname; | |
253 | ssize_t rc; | |
254 | ||
255 | if (is_namespace_pmem(dev)) { | |
256 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
257 | ||
258 | ns_altname = &nspm->alt_name; | |
259 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
260 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
261 | ||
262 | ns_altname = &nsblk->alt_name; | |
bf9bccc1 DW |
263 | } else |
264 | return -ENXIO; | |
265 | ||
8c2f7e86 | 266 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
267 | return -EBUSY; |
268 | ||
3d9cbe37 | 269 | input = kstrndup(buf, len, GFP_KERNEL); |
bf9bccc1 DW |
270 | if (!input) |
271 | return -ENOMEM; | |
272 | ||
bf9bccc1 DW |
273 | pos = strim(input); |
274 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { | |
275 | rc = -EINVAL; | |
276 | goto out; | |
277 | } | |
278 | ||
279 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); | |
280 | if (!alt_name) { | |
281 | rc = -ENOMEM; | |
282 | goto out; | |
283 | } | |
284 | kfree(*ns_altname); | |
285 | *ns_altname = alt_name; | |
286 | sprintf(*ns_altname, "%s", pos); | |
287 | rc = len; | |
288 | ||
289 | out: | |
290 | kfree(input); | |
291 | return rc; | |
292 | } | |
293 | ||
1b40e09a DW |
294 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
295 | { | |
8c2f7e86 | 296 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
1b40e09a DW |
297 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
298 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
299 | struct nd_label_id label_id; | |
300 | resource_size_t size = 0; | |
301 | struct resource *res; | |
302 | ||
303 | if (!nsblk->uuid) | |
304 | return 0; | |
305 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
306 | for_each_dpa_resource(ndd, res) | |
307 | if (strcmp(res->name, label_id.id) == 0) | |
308 | size += resource_size(res); | |
309 | return size; | |
310 | } | |
311 | ||
047fc8a1 RZ |
312 | static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
313 | { | |
314 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); | |
315 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
316 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
317 | struct nd_label_id label_id; | |
318 | struct resource *res; | |
319 | int count, i; | |
320 | ||
321 | if (!nsblk->uuid || !nsblk->lbasize || !ndd) | |
322 | return false; | |
323 | ||
324 | count = 0; | |
325 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
326 | for_each_dpa_resource(ndd, res) { | |
327 | if (strcmp(res->name, label_id.id) != 0) | |
328 | continue; | |
329 | /* | |
ae551e9c | 330 | * Resources with unacknowledged adjustments indicate a |
047fc8a1 RZ |
331 | * failure to update labels |
332 | */ | |
333 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
334 | return false; | |
335 | count++; | |
336 | } | |
337 | ||
338 | /* These values match after a successful label update */ | |
339 | if (count != nsblk->num_resources) | |
340 | return false; | |
341 | ||
342 | for (i = 0; i < nsblk->num_resources; i++) { | |
343 | struct resource *found = NULL; | |
344 | ||
345 | for_each_dpa_resource(ndd, res) | |
346 | if (res == nsblk->res[i]) { | |
347 | found = res; | |
348 | break; | |
349 | } | |
350 | /* stale resource */ | |
351 | if (!found) | |
352 | return false; | |
353 | } | |
354 | ||
355 | return true; | |
356 | } | |
357 | ||
358 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) | |
359 | { | |
360 | resource_size_t size; | |
361 | ||
362 | nvdimm_bus_lock(&nsblk->common.dev); | |
363 | size = __nd_namespace_blk_validate(nsblk); | |
364 | nvdimm_bus_unlock(&nsblk->common.dev); | |
365 | ||
366 | return size; | |
367 | } | |
368 | EXPORT_SYMBOL(nd_namespace_blk_validate); | |
369 | ||
370 | ||
f524bf27 DW |
371 | static int nd_namespace_label_update(struct nd_region *nd_region, |
372 | struct device *dev) | |
373 | { | |
8c2f7e86 | 374 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
f524bf27 | 375 | "namespace must be idle during label update\n"); |
8c2f7e86 | 376 | if (dev->driver || to_ndns(dev)->claim) |
f524bf27 DW |
377 | return 0; |
378 | ||
379 | /* | |
380 | * Only allow label writes that will result in a valid namespace | |
381 | * or deletion of an existing namespace. | |
382 | */ | |
383 | if (is_namespace_pmem(dev)) { | |
384 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0ba1c634 | 385 | resource_size_t size = resource_size(&nspm->nsio.res); |
f524bf27 DW |
386 | |
387 | if (size == 0 && nspm->uuid) | |
388 | /* delete allocation */; | |
389 | else if (!nspm->uuid) | |
390 | return 0; | |
391 | ||
392 | return nd_pmem_namespace_label_update(nd_region, nspm, size); | |
393 | } else if (is_namespace_blk(dev)) { | |
0ba1c634 DW |
394 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
395 | resource_size_t size = nd_namespace_blk_size(nsblk); | |
396 | ||
397 | if (size == 0 && nsblk->uuid) | |
398 | /* delete allocation */; | |
399 | else if (!nsblk->uuid || !nsblk->lbasize) | |
400 | return 0; | |
401 | ||
402 | return nd_blk_namespace_label_update(nd_region, nsblk, size); | |
f524bf27 DW |
403 | } else |
404 | return -ENXIO; | |
405 | } | |
406 | ||
bf9bccc1 DW |
407 | static ssize_t alt_name_store(struct device *dev, |
408 | struct device_attribute *attr, const char *buf, size_t len) | |
409 | { | |
f524bf27 | 410 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
411 | ssize_t rc; |
412 | ||
87a30e1f | 413 | nd_device_lock(dev); |
bf9bccc1 DW |
414 | nvdimm_bus_lock(dev); |
415 | wait_nvdimm_bus_probe_idle(dev); | |
416 | rc = __alt_name_store(dev, buf, len); | |
f524bf27 DW |
417 | if (rc >= 0) |
418 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 | 419 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
bf9bccc1 | 420 | nvdimm_bus_unlock(dev); |
87a30e1f | 421 | nd_device_unlock(dev); |
bf9bccc1 | 422 | |
f524bf27 | 423 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
424 | } |
425 | ||
426 | static ssize_t alt_name_show(struct device *dev, | |
427 | struct device_attribute *attr, char *buf) | |
428 | { | |
429 | char *ns_altname; | |
430 | ||
431 | if (is_namespace_pmem(dev)) { | |
432 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
433 | ||
434 | ns_altname = nspm->alt_name; | |
435 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
436 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
437 | ||
438 | ns_altname = nsblk->alt_name; | |
bf9bccc1 DW |
439 | } else |
440 | return -ENXIO; | |
441 | ||
442 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); | |
443 | } | |
444 | static DEVICE_ATTR_RW(alt_name); | |
445 | ||
446 | static int scan_free(struct nd_region *nd_region, | |
447 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
448 | resource_size_t n) | |
449 | { | |
450 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
451 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
452 | int rc = 0; | |
453 | ||
454 | while (n) { | |
455 | struct resource *res, *last; | |
456 | resource_size_t new_start; | |
457 | ||
458 | last = NULL; | |
459 | for_each_dpa_resource(ndd, res) | |
460 | if (strcmp(res->name, label_id->id) == 0) | |
461 | last = res; | |
462 | res = last; | |
463 | if (!res) | |
464 | return 0; | |
465 | ||
466 | if (n >= resource_size(res)) { | |
467 | n -= resource_size(res); | |
468 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); | |
469 | nvdimm_free_dpa(ndd, res); | |
470 | /* retry with last resource deleted */ | |
471 | continue; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Keep BLK allocations relegated to high DPA as much as | |
476 | * possible | |
477 | */ | |
478 | if (is_blk) | |
479 | new_start = res->start + n; | |
480 | else | |
481 | new_start = res->start; | |
482 | ||
483 | rc = adjust_resource(res, new_start, resource_size(res) - n); | |
1b40e09a DW |
484 | if (rc == 0) |
485 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
486 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
487 | break; | |
488 | } | |
489 | ||
490 | return rc; | |
491 | } | |
492 | ||
493 | /** | |
494 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id | |
495 | * @nd_region: the set of dimms to reclaim @n bytes from | |
496 | * @label_id: unique identifier for the namespace consuming this dpa range | |
497 | * @n: number of bytes per-dimm to release | |
498 | * | |
499 | * Assumes resources are ordered. Starting from the end try to | |
500 | * adjust_resource() the allocation to @n, but if @n is larger than the | |
501 | * allocation delete it and find the 'new' last allocation in the label | |
502 | * set. | |
503 | */ | |
504 | static int shrink_dpa_allocation(struct nd_region *nd_region, | |
505 | struct nd_label_id *label_id, resource_size_t n) | |
506 | { | |
507 | int i; | |
508 | ||
509 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
510 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
511 | int rc; | |
512 | ||
513 | rc = scan_free(nd_region, nd_mapping, label_id, n); | |
514 | if (rc) | |
515 | return rc; | |
516 | } | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, | |
522 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, | |
523 | resource_size_t n) | |
524 | { | |
525 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
526 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
527 | resource_size_t first_dpa; | |
528 | struct resource *res; | |
529 | int rc = 0; | |
530 | ||
531 | /* allocate blk from highest dpa first */ | |
532 | if (is_blk) | |
533 | first_dpa = nd_mapping->start + nd_mapping->size - n; | |
534 | else | |
535 | first_dpa = nd_mapping->start; | |
536 | ||
537 | /* first resource allocation for this label-id or dimm */ | |
538 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); | |
539 | if (!res) | |
540 | rc = -EBUSY; | |
541 | ||
542 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); | |
543 | return rc ? n : 0; | |
544 | } | |
545 | ||
762d067d DW |
546 | |
547 | /** | |
548 | * space_valid() - validate free dpa space against constraints | |
549 | * @nd_region: hosting region of the free space | |
550 | * @ndd: dimm device data for debug | |
551 | * @label_id: namespace id to allocate space | |
552 | * @prev: potential allocation that precedes free space | |
553 | * @next: allocation that follows the given free space range | |
554 | * @exist: first allocation with same id in the mapping | |
555 | * @n: range that must satisfied for pmem allocations | |
556 | * @valid: free space range to validate | |
557 | * | |
558 | * BLK-space is valid as long as it does not precede a PMEM | |
559 | * allocation in a given region. PMEM-space must be contiguous | |
560 | * and adjacent to an existing existing allocation (if one | |
561 | * exists). If reserving PMEM any space is valid. | |
562 | */ | |
563 | static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, | |
564 | struct nd_label_id *label_id, struct resource *prev, | |
565 | struct resource *next, struct resource *exist, | |
566 | resource_size_t n, struct resource *valid) | |
bf9bccc1 | 567 | { |
762d067d DW |
568 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
569 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
570 | ||
571 | if (valid->start >= valid->end) | |
572 | goto invalid; | |
573 | ||
574 | if (is_reserve) | |
575 | return; | |
576 | ||
577 | if (!is_pmem) { | |
578 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
579 | struct nvdimm_bus *nvdimm_bus; | |
580 | struct blk_alloc_info info = { | |
581 | .nd_mapping = nd_mapping, | |
582 | .available = nd_mapping->size, | |
583 | .res = valid, | |
584 | }; | |
585 | ||
586 | WARN_ON(!is_nd_blk(&nd_region->dev)); | |
587 | nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); | |
588 | device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); | |
589 | return; | |
590 | } | |
591 | ||
592 | /* allocation needs to be contiguous, so this is all or nothing */ | |
593 | if (resource_size(valid) < n) | |
594 | goto invalid; | |
595 | ||
596 | /* we've got all the space we need and no existing allocation */ | |
597 | if (!exist) | |
598 | return; | |
599 | ||
600 | /* allocation needs to be contiguous with the existing namespace */ | |
601 | if (valid->start == exist->end + 1 | |
602 | || valid->end == exist->start - 1) | |
603 | return; | |
604 | ||
605 | invalid: | |
606 | /* truncate @valid size to 0 */ | |
607 | valid->end = valid->start - 1; | |
bf9bccc1 DW |
608 | } |
609 | ||
610 | enum alloc_loc { | |
611 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, | |
612 | }; | |
613 | ||
614 | static resource_size_t scan_allocate(struct nd_region *nd_region, | |
615 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
616 | resource_size_t n) | |
617 | { | |
618 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; | |
619 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
620 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
762d067d | 621 | struct resource *res, *exist = NULL, valid; |
bf9bccc1 | 622 | const resource_size_t to_allocate = n; |
bf9bccc1 DW |
623 | int first; |
624 | ||
762d067d DW |
625 | for_each_dpa_resource(ndd, res) |
626 | if (strcmp(label_id->id, res->name) == 0) | |
627 | exist = res; | |
628 | ||
629 | valid.start = nd_mapping->start; | |
630 | valid.end = mapping_end; | |
631 | valid.name = "free space"; | |
bf9bccc1 DW |
632 | retry: |
633 | first = 0; | |
634 | for_each_dpa_resource(ndd, res) { | |
bf9bccc1 | 635 | struct resource *next = res->sibling, *new_res = NULL; |
762d067d | 636 | resource_size_t allocate, available = 0; |
bf9bccc1 DW |
637 | enum alloc_loc loc = ALLOC_ERR; |
638 | const char *action; | |
639 | int rc = 0; | |
640 | ||
641 | /* ignore resources outside this nd_mapping */ | |
642 | if (res->start > mapping_end) | |
643 | continue; | |
644 | if (res->end < nd_mapping->start) | |
645 | continue; | |
646 | ||
647 | /* space at the beginning of the mapping */ | |
648 | if (!first++ && res->start > nd_mapping->start) { | |
762d067d DW |
649 | valid.start = nd_mapping->start; |
650 | valid.end = res->start - 1; | |
651 | space_valid(nd_region, ndd, label_id, NULL, next, exist, | |
652 | to_allocate, &valid); | |
653 | available = resource_size(&valid); | |
654 | if (available) | |
bf9bccc1 DW |
655 | loc = ALLOC_BEFORE; |
656 | } | |
657 | ||
658 | /* space between allocations */ | |
659 | if (!loc && next) { | |
762d067d DW |
660 | valid.start = res->start + resource_size(res); |
661 | valid.end = min(mapping_end, next->start - 1); | |
662 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
663 | to_allocate, &valid); | |
664 | available = resource_size(&valid); | |
665 | if (available) | |
bf9bccc1 | 666 | loc = ALLOC_MID; |
bf9bccc1 DW |
667 | } |
668 | ||
669 | /* space at the end of the mapping */ | |
670 | if (!loc && !next) { | |
762d067d DW |
671 | valid.start = res->start + resource_size(res); |
672 | valid.end = mapping_end; | |
673 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
674 | to_allocate, &valid); | |
675 | available = resource_size(&valid); | |
676 | if (available) | |
bf9bccc1 | 677 | loc = ALLOC_AFTER; |
bf9bccc1 DW |
678 | } |
679 | ||
680 | if (!loc || !available) | |
681 | continue; | |
682 | allocate = min(available, n); | |
683 | switch (loc) { | |
684 | case ALLOC_BEFORE: | |
685 | if (strcmp(res->name, label_id->id) == 0) { | |
686 | /* adjust current resource up */ | |
bf9bccc1 DW |
687 | rc = adjust_resource(res, res->start - allocate, |
688 | resource_size(res) + allocate); | |
689 | action = "cur grow up"; | |
690 | } else | |
691 | action = "allocate"; | |
692 | break; | |
693 | case ALLOC_MID: | |
694 | if (strcmp(next->name, label_id->id) == 0) { | |
695 | /* adjust next resource up */ | |
bf9bccc1 DW |
696 | rc = adjust_resource(next, next->start |
697 | - allocate, resource_size(next) | |
698 | + allocate); | |
699 | new_res = next; | |
700 | action = "next grow up"; | |
701 | } else if (strcmp(res->name, label_id->id) == 0) { | |
702 | action = "grow down"; | |
703 | } else | |
704 | action = "allocate"; | |
705 | break; | |
706 | case ALLOC_AFTER: | |
707 | if (strcmp(res->name, label_id->id) == 0) | |
708 | action = "grow down"; | |
709 | else | |
710 | action = "allocate"; | |
711 | break; | |
712 | default: | |
713 | return n; | |
714 | } | |
715 | ||
716 | if (strcmp(action, "allocate") == 0) { | |
717 | /* BLK allocate bottom up */ | |
718 | if (!is_pmem) | |
762d067d | 719 | valid.start += available - allocate; |
bf9bccc1 DW |
720 | |
721 | new_res = nvdimm_allocate_dpa(ndd, label_id, | |
762d067d | 722 | valid.start, allocate); |
bf9bccc1 DW |
723 | if (!new_res) |
724 | rc = -EBUSY; | |
725 | } else if (strcmp(action, "grow down") == 0) { | |
726 | /* adjust current resource down */ | |
727 | rc = adjust_resource(res, res->start, resource_size(res) | |
728 | + allocate); | |
1b40e09a DW |
729 | if (rc == 0) |
730 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
731 | } |
732 | ||
733 | if (!new_res) | |
734 | new_res = res; | |
735 | ||
736 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", | |
737 | action, loc, rc); | |
738 | ||
739 | if (rc) | |
740 | return n; | |
741 | ||
742 | n -= allocate; | |
743 | if (n) { | |
744 | /* | |
745 | * Retry scan with newly inserted resources. | |
746 | * For example, if we did an ALLOC_BEFORE | |
747 | * insertion there may also have been space | |
748 | * available for an ALLOC_AFTER insertion, so we | |
749 | * need to check this same resource again | |
750 | */ | |
751 | goto retry; | |
752 | } else | |
753 | return 0; | |
754 | } | |
755 | ||
1b40e09a DW |
756 | /* |
757 | * If we allocated nothing in the BLK case it may be because we are in | |
758 | * an initial "pmem-reserve pass". Only do an initial BLK allocation | |
759 | * when none of the DPA space is reserved. | |
760 | */ | |
761 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) | |
bf9bccc1 DW |
762 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
763 | return n; | |
764 | } | |
765 | ||
1b40e09a DW |
766 | static int merge_dpa(struct nd_region *nd_region, |
767 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) | |
768 | { | |
769 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
770 | struct resource *res; | |
771 | ||
772 | if (strncmp("pmem", label_id->id, 4) == 0) | |
773 | return 0; | |
774 | retry: | |
775 | for_each_dpa_resource(ndd, res) { | |
776 | int rc; | |
777 | struct resource *next = res->sibling; | |
778 | resource_size_t end = res->start + resource_size(res); | |
779 | ||
780 | if (!next || strcmp(res->name, label_id->id) != 0 | |
781 | || strcmp(next->name, label_id->id) != 0 | |
782 | || end != next->start) | |
783 | continue; | |
784 | end += resource_size(next); | |
785 | nvdimm_free_dpa(ndd, next); | |
786 | rc = adjust_resource(res, res->start, end - res->start); | |
787 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); | |
788 | if (rc) | |
789 | return rc; | |
790 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
791 | goto retry; | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
12e3129e | 797 | int __reserve_free_pmem(struct device *dev, void *data) |
1b40e09a DW |
798 | { |
799 | struct nvdimm *nvdimm = data; | |
800 | struct nd_region *nd_region; | |
801 | struct nd_label_id label_id; | |
802 | int i; | |
803 | ||
c9e582aa | 804 | if (!is_memory(dev)) |
1b40e09a DW |
805 | return 0; |
806 | ||
807 | nd_region = to_nd_region(dev); | |
808 | if (nd_region->ndr_mappings == 0) | |
809 | return 0; | |
810 | ||
811 | memset(&label_id, 0, sizeof(label_id)); | |
812 | strcat(label_id.id, "pmem-reserve"); | |
813 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
814 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
815 | resource_size_t n, rem = 0; | |
816 | ||
817 | if (nd_mapping->nvdimm != nvdimm) | |
818 | continue; | |
819 | ||
820 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); | |
821 | if (n == 0) | |
822 | return 0; | |
823 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); | |
824 | dev_WARN_ONCE(&nd_region->dev, rem, | |
825 | "pmem reserve underrun: %#llx of %#llx bytes\n", | |
826 | (unsigned long long) n - rem, | |
827 | (unsigned long long) n); | |
828 | return rem ? -ENXIO : 0; | |
829 | } | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
12e3129e | 834 | void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
1b40e09a DW |
835 | struct nd_mapping *nd_mapping) |
836 | { | |
837 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
838 | struct resource *res, *_res; | |
839 | ||
840 | for_each_dpa_resource_safe(ndd, res, _res) | |
841 | if (strcmp(res->name, "pmem-reserve") == 0) | |
842 | nvdimm_free_dpa(ndd, res); | |
843 | } | |
844 | ||
845 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
846 | struct nd_mapping *nd_mapping) | |
847 | { | |
848 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
849 | int rc; | |
850 | ||
851 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, | |
852 | __reserve_free_pmem); | |
853 | if (rc) | |
854 | release_free_pmem(nvdimm_bus, nd_mapping); | |
855 | return rc; | |
856 | } | |
857 | ||
bf9bccc1 DW |
858 | /** |
859 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id | |
860 | * @nd_region: the set of dimms to allocate @n more bytes from | |
861 | * @label_id: unique identifier for the namespace consuming this dpa range | |
862 | * @n: number of bytes per-dimm to add to the existing allocation | |
863 | * | |
864 | * Assumes resources are ordered. For BLK regions, first consume | |
865 | * BLK-only available DPA free space, then consume PMEM-aliased DPA | |
866 | * space starting at the highest DPA. For PMEM regions start | |
867 | * allocations from the start of an interleave set and end at the first | |
868 | * BLK allocation or the end of the interleave set, whichever comes | |
869 | * first. | |
870 | */ | |
871 | static int grow_dpa_allocation(struct nd_region *nd_region, | |
872 | struct nd_label_id *label_id, resource_size_t n) | |
873 | { | |
1b40e09a DW |
874 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
875 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
bf9bccc1 DW |
876 | int i; |
877 | ||
878 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
879 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1b40e09a DW |
880 | resource_size_t rem = n; |
881 | int rc, j; | |
882 | ||
883 | /* | |
884 | * In the BLK case try once with all unallocated PMEM | |
885 | * reserved, and once without | |
886 | */ | |
887 | for (j = is_pmem; j < 2; j++) { | |
888 | bool blk_only = j == 0; | |
889 | ||
890 | if (blk_only) { | |
891 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); | |
892 | if (rc) | |
893 | return rc; | |
894 | } | |
895 | rem = scan_allocate(nd_region, nd_mapping, | |
896 | label_id, rem); | |
897 | if (blk_only) | |
898 | release_free_pmem(nvdimm_bus, nd_mapping); | |
bf9bccc1 | 899 | |
1b40e09a DW |
900 | /* try again and allow encroachments into PMEM */ |
901 | if (rem == 0) | |
902 | break; | |
903 | } | |
904 | ||
905 | dev_WARN_ONCE(&nd_region->dev, rem, | |
906 | "allocation underrun: %#llx of %#llx bytes\n", | |
907 | (unsigned long long) n - rem, | |
908 | (unsigned long long) n); | |
909 | if (rem) | |
910 | return -ENXIO; | |
911 | ||
912 | rc = merge_dpa(nd_region, nd_mapping, label_id); | |
bf9bccc1 DW |
913 | if (rc) |
914 | return rc; | |
915 | } | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
0e3b0d12 | 920 | static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
bf9bccc1 DW |
921 | struct nd_namespace_pmem *nspm, resource_size_t size) |
922 | { | |
923 | struct resource *res = &nspm->nsio.res; | |
0e3b0d12 | 924 | resource_size_t offset = 0; |
bf9bccc1 | 925 | |
0e3b0d12 DW |
926 | if (size && !nspm->uuid) { |
927 | WARN_ON_ONCE(1); | |
928 | size = 0; | |
929 | } | |
930 | ||
931 | if (size && nspm->uuid) { | |
932 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
933 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
934 | struct nd_label_id label_id; | |
935 | struct resource *res; | |
936 | ||
937 | if (!ndd) { | |
938 | size = 0; | |
939 | goto out; | |
940 | } | |
941 | ||
942 | nd_label_gen_id(&label_id, nspm->uuid, 0); | |
943 | ||
944 | /* calculate a spa offset from the dpa allocation offset */ | |
945 | for_each_dpa_resource(ndd, res) | |
946 | if (strcmp(res->name, label_id.id) == 0) { | |
947 | offset = (res->start - nd_mapping->start) | |
948 | * nd_region->ndr_mappings; | |
949 | goto out; | |
950 | } | |
951 | ||
952 | WARN_ON_ONCE(1); | |
953 | size = 0; | |
954 | } | |
955 | ||
956 | out: | |
957 | res->start = nd_region->ndr_start + offset; | |
958 | res->end = res->start + size - 1; | |
bf9bccc1 DW |
959 | } |
960 | ||
bd26d0d0 DK |
961 | static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where) |
962 | { | |
963 | if (!uuid) { | |
964 | dev_dbg(dev, "%s: uuid not set\n", where); | |
965 | return true; | |
966 | } | |
967 | return false; | |
968 | } | |
969 | ||
bf9bccc1 DW |
970 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
971 | { | |
972 | resource_size_t allocated = 0, available = 0; | |
973 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1f19b983 | 974 | struct nd_namespace_common *ndns = to_ndns(dev); |
bf9bccc1 DW |
975 | struct nd_mapping *nd_mapping; |
976 | struct nvdimm_drvdata *ndd; | |
977 | struct nd_label_id label_id; | |
978 | u32 flags = 0, remainder; | |
9d032f42 | 979 | int rc, i, id = -1; |
bf9bccc1 | 980 | u8 *uuid = NULL; |
bf9bccc1 | 981 | |
1f19b983 | 982 | if (dev->driver || ndns->claim) |
bf9bccc1 DW |
983 | return -EBUSY; |
984 | ||
985 | if (is_namespace_pmem(dev)) { | |
986 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
987 | ||
988 | uuid = nspm->uuid; | |
9d032f42 | 989 | id = nspm->id; |
bf9bccc1 | 990 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
991 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
992 | ||
993 | uuid = nsblk->uuid; | |
994 | flags = NSLABEL_FLAG_LOCAL; | |
9d032f42 | 995 | id = nsblk->id; |
bf9bccc1 DW |
996 | } |
997 | ||
998 | /* | |
999 | * We need a uuid for the allocation-label and dimm(s) on which | |
1000 | * to store the label. | |
1001 | */ | |
bd26d0d0 | 1002 | if (uuid_not_set(uuid, dev, __func__)) |
bf9bccc1 | 1003 | return -ENXIO; |
bd26d0d0 | 1004 | if (nd_region->ndr_mappings == 0) { |
426824d6 | 1005 | dev_dbg(dev, "not associated with dimm(s)\n"); |
bd26d0d0 DK |
1006 | return -ENXIO; |
1007 | } | |
bf9bccc1 | 1008 | |
5b26db95 | 1009 | div_u64_rem(val, PAGE_SIZE * nd_region->ndr_mappings, &remainder); |
bf9bccc1 | 1010 | if (remainder) { |
5b26db95 AK |
1011 | dev_dbg(dev, "%llu is not %ldK aligned\n", val, |
1012 | (PAGE_SIZE * nd_region->ndr_mappings) / SZ_1K); | |
bf9bccc1 DW |
1013 | return -EINVAL; |
1014 | } | |
1015 | ||
1016 | nd_label_gen_id(&label_id, uuid, flags); | |
1017 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1018 | nd_mapping = &nd_region->mapping[i]; | |
1019 | ndd = to_ndd(nd_mapping); | |
1020 | ||
1021 | /* | |
1022 | * All dimms in an interleave set, or the base dimm for a blk | |
1023 | * region, need to be enabled for the size to be changed. | |
1024 | */ | |
1025 | if (!ndd) | |
1026 | return -ENXIO; | |
1027 | ||
1028 | allocated += nvdimm_allocated_dpa(ndd, &label_id); | |
1029 | } | |
12e3129e | 1030 | available = nd_region_allocatable_dpa(nd_region); |
bf9bccc1 DW |
1031 | |
1032 | if (val > available + allocated) | |
1033 | return -ENOSPC; | |
1034 | ||
1035 | if (val == allocated) | |
1036 | return 0; | |
1037 | ||
1038 | val = div_u64(val, nd_region->ndr_mappings); | |
1039 | allocated = div_u64(allocated, nd_region->ndr_mappings); | |
1040 | if (val < allocated) | |
1041 | rc = shrink_dpa_allocation(nd_region, &label_id, | |
1042 | allocated - val); | |
1043 | else | |
1044 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); | |
1045 | ||
1046 | if (rc) | |
1047 | return rc; | |
1048 | ||
1049 | if (is_namespace_pmem(dev)) { | |
1050 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1051 | ||
0e3b0d12 | 1052 | nd_namespace_pmem_set_resource(nd_region, nspm, |
bf9bccc1 DW |
1053 | val * nd_region->ndr_mappings); |
1054 | } | |
1055 | ||
1f19b983 DW |
1056 | /* |
1057 | * Try to delete the namespace if we deleted all of its | |
9d032f42 DW |
1058 | * allocation, this is not the seed or 0th device for the |
1059 | * region, and it is not actively claimed by a btt, pfn, or dax | |
1060 | * instance. | |
1f19b983 | 1061 | */ |
9d032f42 | 1062 | if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim) |
1f19b983 DW |
1063 | nd_device_unregister(dev, ND_ASYNC); |
1064 | ||
bf9bccc1 DW |
1065 | return rc; |
1066 | } | |
1067 | ||
1068 | static ssize_t size_store(struct device *dev, | |
1069 | struct device_attribute *attr, const char *buf, size_t len) | |
1070 | { | |
f524bf27 | 1071 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
1072 | unsigned long long val; |
1073 | u8 **uuid = NULL; | |
1074 | int rc; | |
1075 | ||
1076 | rc = kstrtoull(buf, 0, &val); | |
1077 | if (rc) | |
1078 | return rc; | |
1079 | ||
87a30e1f | 1080 | nd_device_lock(dev); |
bf9bccc1 DW |
1081 | nvdimm_bus_lock(dev); |
1082 | wait_nvdimm_bus_probe_idle(dev); | |
1083 | rc = __size_store(dev, val); | |
f524bf27 DW |
1084 | if (rc >= 0) |
1085 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
1086 | |
1087 | if (is_namespace_pmem(dev)) { | |
1088 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1089 | ||
1090 | uuid = &nspm->uuid; | |
1091 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1092 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1093 | ||
1094 | uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1095 | } |
1096 | ||
1097 | if (rc == 0 && val == 0 && uuid) { | |
1098 | /* setting size zero == 'delete namespace' */ | |
1099 | kfree(*uuid); | |
1100 | *uuid = NULL; | |
1101 | } | |
1102 | ||
426824d6 | 1103 | dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc); |
bf9bccc1 DW |
1104 | |
1105 | nvdimm_bus_unlock(dev); | |
87a30e1f | 1106 | nd_device_unlock(dev); |
bf9bccc1 | 1107 | |
f524bf27 | 1108 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1109 | } |
1110 | ||
8c2f7e86 | 1111 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc1 | 1112 | { |
8c2f7e86 | 1113 | struct device *dev = &ndns->dev; |
1b40e09a | 1114 | |
bf9bccc1 DW |
1115 | if (is_namespace_pmem(dev)) { |
1116 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1117 | ||
8c2f7e86 | 1118 | return resource_size(&nspm->nsio.res); |
bf9bccc1 | 1119 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 | 1120 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc1 DW |
1121 | } else if (is_namespace_io(dev)) { |
1122 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1123 | ||
8c2f7e86 DW |
1124 | return resource_size(&nsio->res); |
1125 | } else | |
1126 | WARN_ONCE(1, "unknown namespace type\n"); | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) | |
1131 | { | |
1132 | resource_size_t size; | |
1b40e09a | 1133 | |
8c2f7e86 DW |
1134 | nvdimm_bus_lock(&ndns->dev); |
1135 | size = __nvdimm_namespace_capacity(ndns); | |
1136 | nvdimm_bus_unlock(&ndns->dev); | |
1137 | ||
1138 | return size; | |
1139 | } | |
1140 | EXPORT_SYMBOL(nvdimm_namespace_capacity); | |
1141 | ||
08e6b3c6 DW |
1142 | bool nvdimm_namespace_locked(struct nd_namespace_common *ndns) |
1143 | { | |
1144 | int i; | |
1145 | bool locked = false; | |
1146 | struct device *dev = &ndns->dev; | |
1147 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1148 | ||
1149 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1150 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1151 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
1152 | ||
1153 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) { | |
1154 | dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm)); | |
1155 | locked = true; | |
1156 | } | |
1157 | } | |
1158 | return locked; | |
1159 | } | |
1160 | EXPORT_SYMBOL(nvdimm_namespace_locked); | |
1161 | ||
8c2f7e86 DW |
1162 | static ssize_t size_show(struct device *dev, |
1163 | struct device_attribute *attr, char *buf) | |
1164 | { | |
1165 | return sprintf(buf, "%llu\n", (unsigned long long) | |
1166 | nvdimm_namespace_capacity(to_ndns(dev))); | |
bf9bccc1 | 1167 | } |
b44fe760 | 1168 | static DEVICE_ATTR(size, 0444, size_show, size_store); |
bf9bccc1 | 1169 | |
f95b4bca | 1170 | static u8 *namespace_to_uuid(struct device *dev) |
bf9bccc1 | 1171 | { |
bf9bccc1 DW |
1172 | if (is_namespace_pmem(dev)) { |
1173 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1174 | ||
f95b4bca | 1175 | return nspm->uuid; |
bf9bccc1 | 1176 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
1177 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1178 | ||
f95b4bca | 1179 | return nsblk->uuid; |
bf9bccc1 | 1180 | } else |
f95b4bca DW |
1181 | return ERR_PTR(-ENXIO); |
1182 | } | |
1183 | ||
1184 | static ssize_t uuid_show(struct device *dev, | |
1185 | struct device_attribute *attr, char *buf) | |
1186 | { | |
1187 | u8 *uuid = namespace_to_uuid(dev); | |
bf9bccc1 | 1188 | |
f95b4bca DW |
1189 | if (IS_ERR(uuid)) |
1190 | return PTR_ERR(uuid); | |
bf9bccc1 DW |
1191 | if (uuid) |
1192 | return sprintf(buf, "%pUb\n", uuid); | |
1193 | return sprintf(buf, "\n"); | |
1194 | } | |
1195 | ||
1196 | /** | |
1197 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" | |
1198 | * @nd_region: parent region so we can updates all dimms in the set | |
1199 | * @dev: namespace type for generating label_id | |
1200 | * @new_uuid: incoming uuid | |
1201 | * @old_uuid: reference to the uuid storage location in the namespace object | |
1202 | */ | |
1203 | static int namespace_update_uuid(struct nd_region *nd_region, | |
1204 | struct device *dev, u8 *new_uuid, u8 **old_uuid) | |
1205 | { | |
1206 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; | |
1207 | struct nd_label_id old_label_id; | |
1208 | struct nd_label_id new_label_id; | |
f524bf27 | 1209 | int i; |
bf9bccc1 | 1210 | |
f524bf27 DW |
1211 | if (!nd_is_uuid_unique(dev, new_uuid)) |
1212 | return -EINVAL; | |
bf9bccc1 DW |
1213 | |
1214 | if (*old_uuid == NULL) | |
1215 | goto out; | |
1216 | ||
f524bf27 DW |
1217 | /* |
1218 | * If we've already written a label with this uuid, then it's | |
1219 | * too late to rename because we can't reliably update the uuid | |
1220 | * without losing the old namespace. Userspace must delete this | |
1221 | * namespace to abandon the old uuid. | |
1222 | */ | |
1223 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1224 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1225 | ||
1226 | /* | |
1227 | * This check by itself is sufficient because old_uuid | |
1228 | * would be NULL above if this uuid did not exist in the | |
1229 | * currently written set. | |
1230 | * | |
1231 | * FIXME: can we delete uuid with zero dpa allocated? | |
1232 | */ | |
ae8219f1 | 1233 | if (list_empty(&nd_mapping->labels)) |
f524bf27 DW |
1234 | return -EBUSY; |
1235 | } | |
1236 | ||
bf9bccc1 DW |
1237 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
1238 | nd_label_gen_id(&new_label_id, new_uuid, flags); | |
1239 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1240 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1241 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
c4703ce1 | 1242 | struct nd_label_ent *label_ent; |
bf9bccc1 DW |
1243 | struct resource *res; |
1244 | ||
1245 | for_each_dpa_resource(ndd, res) | |
1246 | if (strcmp(res->name, old_label_id.id) == 0) | |
1247 | sprintf((void *) res->name, "%s", | |
1248 | new_label_id.id); | |
c4703ce1 DW |
1249 | |
1250 | mutex_lock(&nd_mapping->lock); | |
1251 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { | |
1252 | struct nd_namespace_label *nd_label = label_ent->label; | |
1253 | struct nd_label_id label_id; | |
1254 | ||
1255 | if (!nd_label) | |
1256 | continue; | |
1257 | nd_label_gen_id(&label_id, nd_label->uuid, | |
1258 | __le32_to_cpu(nd_label->flags)); | |
1259 | if (strcmp(old_label_id.id, label_id.id) == 0) | |
1260 | set_bit(ND_LABEL_REAP, &label_ent->flags); | |
1261 | } | |
1262 | mutex_unlock(&nd_mapping->lock); | |
bf9bccc1 DW |
1263 | } |
1264 | kfree(*old_uuid); | |
1265 | out: | |
1266 | *old_uuid = new_uuid; | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | static ssize_t uuid_store(struct device *dev, | |
1271 | struct device_attribute *attr, const char *buf, size_t len) | |
1272 | { | |
1273 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1274 | u8 *uuid = NULL; | |
8c2f7e86 | 1275 | ssize_t rc = 0; |
bf9bccc1 | 1276 | u8 **ns_uuid; |
bf9bccc1 DW |
1277 | |
1278 | if (is_namespace_pmem(dev)) { | |
1279 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1280 | ||
1281 | ns_uuid = &nspm->uuid; | |
1282 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1283 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1284 | ||
1285 | ns_uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1286 | } else |
1287 | return -ENXIO; | |
1288 | ||
87a30e1f | 1289 | nd_device_lock(dev); |
bf9bccc1 DW |
1290 | nvdimm_bus_lock(dev); |
1291 | wait_nvdimm_bus_probe_idle(dev); | |
8c2f7e86 DW |
1292 | if (to_ndns(dev)->claim) |
1293 | rc = -EBUSY; | |
1294 | if (rc >= 0) | |
1295 | rc = nd_uuid_store(dev, &uuid, buf, len); | |
bf9bccc1 DW |
1296 | if (rc >= 0) |
1297 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); | |
f524bf27 DW |
1298 | if (rc >= 0) |
1299 | rc = nd_namespace_label_update(nd_region, dev); | |
1300 | else | |
1301 | kfree(uuid); | |
426824d6 DW |
1302 | dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf, |
1303 | buf[len - 1] == '\n' ? "" : "\n"); | |
bf9bccc1 | 1304 | nvdimm_bus_unlock(dev); |
87a30e1f | 1305 | nd_device_unlock(dev); |
bf9bccc1 | 1306 | |
f524bf27 | 1307 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1308 | } |
1309 | static DEVICE_ATTR_RW(uuid); | |
1310 | ||
1311 | static ssize_t resource_show(struct device *dev, | |
1312 | struct device_attribute *attr, char *buf) | |
1313 | { | |
1314 | struct resource *res; | |
1315 | ||
1316 | if (is_namespace_pmem(dev)) { | |
1317 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1318 | ||
1319 | res = &nspm->nsio.res; | |
1320 | } else if (is_namespace_io(dev)) { | |
1321 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1322 | ||
1323 | res = &nsio->res; | |
1324 | } else | |
1325 | return -ENXIO; | |
1326 | ||
1327 | /* no address to convey if the namespace has no allocation */ | |
1328 | if (resource_size(res) == 0) | |
1329 | return -ENXIO; | |
1330 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); | |
1331 | } | |
1332 | static DEVICE_ATTR_RO(resource); | |
1333 | ||
f979b13c | 1334 | static const unsigned long blk_lbasize_supported[] = { 512, 520, 528, |
fcae6957 | 1335 | 4096, 4104, 4160, 4224, 0 }; |
1b40e09a | 1336 | |
f979b13c DW |
1337 | static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; |
1338 | ||
1b40e09a DW |
1339 | static ssize_t sector_size_show(struct device *dev, |
1340 | struct device_attribute *attr, char *buf) | |
1341 | { | |
f979b13c DW |
1342 | if (is_namespace_blk(dev)) { |
1343 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1b40e09a | 1344 | |
b2c48f9f | 1345 | return nd_size_select_show(nsblk->lbasize, |
f979b13c DW |
1346 | blk_lbasize_supported, buf); |
1347 | } | |
1b40e09a | 1348 | |
f979b13c DW |
1349 | if (is_namespace_pmem(dev)) { |
1350 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1351 | ||
b2c48f9f | 1352 | return nd_size_select_show(nspm->lbasize, |
f979b13c DW |
1353 | pmem_lbasize_supported, buf); |
1354 | } | |
1355 | return -ENXIO; | |
1b40e09a DW |
1356 | } |
1357 | ||
1358 | static ssize_t sector_size_store(struct device *dev, | |
1359 | struct device_attribute *attr, const char *buf, size_t len) | |
1360 | { | |
f524bf27 | 1361 | struct nd_region *nd_region = to_nd_region(dev->parent); |
f979b13c DW |
1362 | const unsigned long *supported; |
1363 | unsigned long *lbasize; | |
8c2f7e86 | 1364 | ssize_t rc = 0; |
1b40e09a | 1365 | |
f979b13c DW |
1366 | if (is_namespace_blk(dev)) { |
1367 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1368 | ||
1369 | lbasize = &nsblk->lbasize; | |
1370 | supported = blk_lbasize_supported; | |
1371 | } else if (is_namespace_pmem(dev)) { | |
1372 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1373 | ||
1374 | lbasize = &nspm->lbasize; | |
1375 | supported = pmem_lbasize_supported; | |
1376 | } else | |
1b40e09a DW |
1377 | return -ENXIO; |
1378 | ||
87a30e1f | 1379 | nd_device_lock(dev); |
1b40e09a | 1380 | nvdimm_bus_lock(dev); |
8c2f7e86 DW |
1381 | if (to_ndns(dev)->claim) |
1382 | rc = -EBUSY; | |
1383 | if (rc >= 0) | |
b2c48f9f | 1384 | rc = nd_size_select_store(dev, buf, lbasize, supported); |
f524bf27 DW |
1385 | if (rc >= 0) |
1386 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 DW |
1387 | dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote", |
1388 | buf, buf[len - 1] == '\n' ? "" : "\n"); | |
1b40e09a | 1389 | nvdimm_bus_unlock(dev); |
87a30e1f | 1390 | nd_device_unlock(dev); |
1b40e09a DW |
1391 | |
1392 | return rc ? rc : len; | |
1393 | } | |
1394 | static DEVICE_ATTR_RW(sector_size); | |
1395 | ||
0ba1c634 DW |
1396 | static ssize_t dpa_extents_show(struct device *dev, |
1397 | struct device_attribute *attr, char *buf) | |
1398 | { | |
1399 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1400 | struct nd_label_id label_id; | |
1401 | int count = 0, i; | |
1402 | u8 *uuid = NULL; | |
1403 | u32 flags = 0; | |
1404 | ||
1405 | nvdimm_bus_lock(dev); | |
1406 | if (is_namespace_pmem(dev)) { | |
1407 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1408 | ||
1409 | uuid = nspm->uuid; | |
1410 | flags = 0; | |
1411 | } else if (is_namespace_blk(dev)) { | |
1412 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1413 | ||
1414 | uuid = nsblk->uuid; | |
1415 | flags = NSLABEL_FLAG_LOCAL; | |
1416 | } | |
1417 | ||
1418 | if (!uuid) | |
1419 | goto out; | |
1420 | ||
1421 | nd_label_gen_id(&label_id, uuid, flags); | |
1422 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1423 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1424 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1425 | struct resource *res; | |
1426 | ||
1427 | for_each_dpa_resource(ndd, res) | |
1428 | if (strcmp(res->name, label_id.id) == 0) | |
1429 | count++; | |
1430 | } | |
1431 | out: | |
1432 | nvdimm_bus_unlock(dev); | |
1433 | ||
1434 | return sprintf(buf, "%d\n", count); | |
1435 | } | |
1436 | static DEVICE_ATTR_RO(dpa_extents); | |
1437 | ||
14e49454 VV |
1438 | static int btt_claim_class(struct device *dev) |
1439 | { | |
1440 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1441 | int i, loop_bitmask = 0; | |
1442 | ||
1443 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1444 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1445 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1446 | struct nd_namespace_index *nsindex; | |
1447 | ||
33a56086 DW |
1448 | /* |
1449 | * If any of the DIMMs do not support labels the only | |
1450 | * possible BTT format is v1. | |
1451 | */ | |
1452 | if (!ndd) { | |
1453 | loop_bitmask = 0; | |
1454 | break; | |
1455 | } | |
1456 | ||
14e49454 VV |
1457 | nsindex = to_namespace_index(ndd, ndd->ns_current); |
1458 | if (nsindex == NULL) | |
1459 | loop_bitmask |= 1; | |
1460 | else { | |
1461 | /* check whether existing labels are v1.1 or v1.2 */ | |
1462 | if (__le16_to_cpu(nsindex->major) == 1 | |
1463 | && __le16_to_cpu(nsindex->minor) == 1) | |
1464 | loop_bitmask |= 2; | |
1465 | else | |
1466 | loop_bitmask |= 4; | |
1467 | } | |
1468 | } | |
1469 | /* | |
1470 | * If nsindex is null loop_bitmask's bit 0 will be set, and if an index | |
1471 | * block is found, a v1.1 label for any mapping will set bit 1, and a | |
1472 | * v1.2 label will set bit 2. | |
1473 | * | |
1474 | * At the end of the loop, at most one of the three bits must be set. | |
1475 | * If multiple bits were set, it means the different mappings disagree | |
1476 | * about their labels, and this must be cleaned up first. | |
1477 | * | |
1478 | * If all the label index blocks are found to agree, nsindex of NULL | |
1479 | * implies labels haven't been initialized yet, and when they will, | |
1480 | * they will be of the 1.2 format, so we can assume BTT2.0 | |
1481 | * | |
1482 | * If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are | |
1483 | * found, we enforce BTT2.0 | |
1484 | * | |
1485 | * If the loop was never entered, default to BTT1.1 (legacy namespaces) | |
1486 | */ | |
1487 | switch (loop_bitmask) { | |
1488 | case 0: | |
1489 | case 2: | |
1490 | return NVDIMM_CCLASS_BTT; | |
1491 | case 1: | |
1492 | case 4: | |
1493 | return NVDIMM_CCLASS_BTT2; | |
1494 | default: | |
1495 | return -ENXIO; | |
1496 | } | |
1497 | } | |
1498 | ||
8c2f7e86 DW |
1499 | static ssize_t holder_show(struct device *dev, |
1500 | struct device_attribute *attr, char *buf) | |
1501 | { | |
1502 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1503 | ssize_t rc; | |
1504 | ||
87a30e1f | 1505 | nd_device_lock(dev); |
8c2f7e86 | 1506 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); |
87a30e1f | 1507 | nd_device_unlock(dev); |
8c2f7e86 DW |
1508 | |
1509 | return rc; | |
1510 | } | |
1511 | static DEVICE_ATTR_RO(holder); | |
1512 | ||
b3fde74e DW |
1513 | static ssize_t __holder_class_store(struct device *dev, const char *buf) |
1514 | { | |
1515 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1516 | ||
1517 | if (dev->driver || ndns->claim) | |
1518 | return -EBUSY; | |
1519 | ||
075c3fdd | 1520 | if (sysfs_streq(buf, "btt")) |
14e49454 | 1521 | ndns->claim_class = btt_claim_class(dev); |
075c3fdd | 1522 | else if (sysfs_streq(buf, "pfn")) |
b3fde74e | 1523 | ndns->claim_class = NVDIMM_CCLASS_PFN; |
075c3fdd | 1524 | else if (sysfs_streq(buf, "dax")) |
b3fde74e | 1525 | ndns->claim_class = NVDIMM_CCLASS_DAX; |
075c3fdd | 1526 | else if (sysfs_streq(buf, "")) |
b3fde74e DW |
1527 | ndns->claim_class = NVDIMM_CCLASS_NONE; |
1528 | else | |
1529 | return -EINVAL; | |
1530 | ||
14e49454 VV |
1531 | /* btt_claim_class() could've returned an error */ |
1532 | if (ndns->claim_class < 0) | |
1533 | return ndns->claim_class; | |
1534 | ||
b3fde74e DW |
1535 | return 0; |
1536 | } | |
1537 | ||
1538 | static ssize_t holder_class_store(struct device *dev, | |
1539 | struct device_attribute *attr, const char *buf, size_t len) | |
1540 | { | |
1541 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1542 | ssize_t rc; | |
1543 | ||
87a30e1f | 1544 | nd_device_lock(dev); |
b3fde74e DW |
1545 | nvdimm_bus_lock(dev); |
1546 | wait_nvdimm_bus_probe_idle(dev); | |
1547 | rc = __holder_class_store(dev, buf); | |
1548 | if (rc >= 0) | |
1549 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 | 1550 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
b3fde74e | 1551 | nvdimm_bus_unlock(dev); |
87a30e1f | 1552 | nd_device_unlock(dev); |
b3fde74e DW |
1553 | |
1554 | return rc < 0 ? rc : len; | |
1555 | } | |
1556 | ||
1557 | static ssize_t holder_class_show(struct device *dev, | |
1558 | struct device_attribute *attr, char *buf) | |
1559 | { | |
1560 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1561 | ssize_t rc; | |
1562 | ||
87a30e1f | 1563 | nd_device_lock(dev); |
b3fde74e DW |
1564 | if (ndns->claim_class == NVDIMM_CCLASS_NONE) |
1565 | rc = sprintf(buf, "\n"); | |
14e49454 VV |
1566 | else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) || |
1567 | (ndns->claim_class == NVDIMM_CCLASS_BTT2)) | |
b3fde74e DW |
1568 | rc = sprintf(buf, "btt\n"); |
1569 | else if (ndns->claim_class == NVDIMM_CCLASS_PFN) | |
1570 | rc = sprintf(buf, "pfn\n"); | |
1571 | else if (ndns->claim_class == NVDIMM_CCLASS_DAX) | |
1572 | rc = sprintf(buf, "dax\n"); | |
1573 | else | |
1574 | rc = sprintf(buf, "<unknown>\n"); | |
87a30e1f | 1575 | nd_device_unlock(dev); |
b3fde74e DW |
1576 | |
1577 | return rc; | |
1578 | } | |
1579 | static DEVICE_ATTR_RW(holder_class); | |
1580 | ||
0731de0d DW |
1581 | static ssize_t mode_show(struct device *dev, |
1582 | struct device_attribute *attr, char *buf) | |
1583 | { | |
1584 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1585 | struct device *claim; | |
1586 | char *mode; | |
1587 | ssize_t rc; | |
1588 | ||
87a30e1f | 1589 | nd_device_lock(dev); |
0731de0d | 1590 | claim = ndns->claim; |
9c412428 | 1591 | if (claim && is_nd_btt(claim)) |
0731de0d | 1592 | mode = "safe"; |
9c412428 DW |
1593 | else if (claim && is_nd_pfn(claim)) |
1594 | mode = "memory"; | |
cd03412a DW |
1595 | else if (claim && is_nd_dax(claim)) |
1596 | mode = "dax"; | |
9c412428 DW |
1597 | else if (!claim && pmem_should_map_pages(dev)) |
1598 | mode = "memory"; | |
0731de0d DW |
1599 | else |
1600 | mode = "raw"; | |
1601 | rc = sprintf(buf, "%s\n", mode); | |
87a30e1f | 1602 | nd_device_unlock(dev); |
0731de0d DW |
1603 | |
1604 | return rc; | |
1605 | } | |
1606 | static DEVICE_ATTR_RO(mode); | |
1607 | ||
8c2f7e86 DW |
1608 | static ssize_t force_raw_store(struct device *dev, |
1609 | struct device_attribute *attr, const char *buf, size_t len) | |
1610 | { | |
1611 | bool force_raw; | |
1612 | int rc = strtobool(buf, &force_raw); | |
1613 | ||
1614 | if (rc) | |
1615 | return rc; | |
1616 | ||
1617 | to_ndns(dev)->force_raw = force_raw; | |
1618 | return len; | |
1619 | } | |
1620 | ||
1621 | static ssize_t force_raw_show(struct device *dev, | |
1622 | struct device_attribute *attr, char *buf) | |
1623 | { | |
1624 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); | |
1625 | } | |
1626 | static DEVICE_ATTR_RW(force_raw); | |
1627 | ||
3d88002e DW |
1628 | static struct attribute *nd_namespace_attributes[] = { |
1629 | &dev_attr_nstype.attr, | |
bf9bccc1 | 1630 | &dev_attr_size.attr, |
0731de0d | 1631 | &dev_attr_mode.attr, |
bf9bccc1 | 1632 | &dev_attr_uuid.attr, |
8c2f7e86 | 1633 | &dev_attr_holder.attr, |
bf9bccc1 DW |
1634 | &dev_attr_resource.attr, |
1635 | &dev_attr_alt_name.attr, | |
8c2f7e86 | 1636 | &dev_attr_force_raw.attr, |
1b40e09a | 1637 | &dev_attr_sector_size.attr, |
0ba1c634 | 1638 | &dev_attr_dpa_extents.attr, |
b3fde74e | 1639 | &dev_attr_holder_class.attr, |
3d88002e DW |
1640 | NULL, |
1641 | }; | |
1642 | ||
bf9bccc1 DW |
1643 | static umode_t namespace_visible(struct kobject *kobj, |
1644 | struct attribute *a, int n) | |
1645 | { | |
1646 | struct device *dev = container_of(kobj, struct device, kobj); | |
1647 | ||
1648 | if (a == &dev_attr_resource.attr) { | |
1649 | if (is_namespace_blk(dev)) | |
1650 | return 0; | |
c1fb3542 | 1651 | return 0400; |
bf9bccc1 DW |
1652 | } |
1653 | ||
1654 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { | |
1655 | if (a == &dev_attr_size.attr) | |
b44fe760 | 1656 | return 0644; |
1b40e09a | 1657 | |
bf9bccc1 DW |
1658 | return a->mode; |
1659 | } | |
1660 | ||
8c2f7e86 DW |
1661 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
1662 | || a == &dev_attr_holder.attr | |
b3fde74e | 1663 | || a == &dev_attr_holder_class.attr |
0731de0d DW |
1664 | || a == &dev_attr_force_raw.attr |
1665 | || a == &dev_attr_mode.attr) | |
bf9bccc1 DW |
1666 | return a->mode; |
1667 | ||
1668 | return 0; | |
1669 | } | |
1670 | ||
3d88002e DW |
1671 | static struct attribute_group nd_namespace_attribute_group = { |
1672 | .attrs = nd_namespace_attributes, | |
bf9bccc1 | 1673 | .is_visible = namespace_visible, |
3d88002e DW |
1674 | }; |
1675 | ||
1676 | static const struct attribute_group *nd_namespace_attribute_groups[] = { | |
1677 | &nd_device_attribute_group, | |
1678 | &nd_namespace_attribute_group, | |
74ae66c3 | 1679 | &nd_numa_attribute_group, |
3d88002e DW |
1680 | NULL, |
1681 | }; | |
1682 | ||
8c2f7e86 DW |
1683 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
1684 | { | |
1685 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; | |
e1455744 | 1686 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
cd03412a | 1687 | struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
0bfb8dd3 | 1688 | struct nd_namespace_common *ndns = NULL; |
8c2f7e86 DW |
1689 | resource_size_t size; |
1690 | ||
cd03412a | 1691 | if (nd_btt || nd_pfn || nd_dax) { |
0bfb8dd3 | 1692 | if (nd_btt) |
e1455744 | 1693 | ndns = nd_btt->ndns; |
0bfb8dd3 | 1694 | else if (nd_pfn) |
e1455744 | 1695 | ndns = nd_pfn->ndns; |
cd03412a DW |
1696 | else if (nd_dax) |
1697 | ndns = nd_dax->nd_pfn.ndns; | |
e1455744 | 1698 | |
0bfb8dd3 | 1699 | if (!ndns) |
8c2f7e86 DW |
1700 | return ERR_PTR(-ENODEV); |
1701 | ||
1702 | /* | |
1703 | * Flush any in-progess probes / removals in the driver | |
1704 | * for the raw personality of this namespace. | |
1705 | */ | |
87a30e1f DW |
1706 | nd_device_lock(&ndns->dev); |
1707 | nd_device_unlock(&ndns->dev); | |
8c2f7e86 DW |
1708 | if (ndns->dev.driver) { |
1709 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", | |
0bfb8dd3 | 1710 | dev_name(dev)); |
8c2f7e86 DW |
1711 | return ERR_PTR(-EBUSY); |
1712 | } | |
0bfb8dd3 | 1713 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
8c2f7e86 | 1714 | "host (%s) vs claim (%s) mismatch\n", |
0bfb8dd3 | 1715 | dev_name(dev), |
8c2f7e86 DW |
1716 | dev_name(ndns->claim))) |
1717 | return ERR_PTR(-ENXIO); | |
1718 | } else { | |
1719 | ndns = to_ndns(dev); | |
1720 | if (ndns->claim) { | |
1721 | dev_dbg(dev, "claimed by %s, failing probe\n", | |
1722 | dev_name(ndns->claim)); | |
1723 | ||
1724 | return ERR_PTR(-ENXIO); | |
1725 | } | |
1726 | } | |
1727 | ||
08e6b3c6 DW |
1728 | if (nvdimm_namespace_locked(ndns)) |
1729 | return ERR_PTR(-EACCES); | |
1730 | ||
8c2f7e86 DW |
1731 | size = nvdimm_namespace_capacity(ndns); |
1732 | if (size < ND_MIN_NAMESPACE_SIZE) { | |
1733 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", | |
1734 | &size, ND_MIN_NAMESPACE_SIZE); | |
1735 | return ERR_PTR(-ENODEV); | |
1736 | } | |
1737 | ||
1738 | if (is_namespace_pmem(&ndns->dev)) { | |
1739 | struct nd_namespace_pmem *nspm; | |
1740 | ||
1741 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
bd26d0d0 | 1742 | if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
8c2f7e86 | 1743 | return ERR_PTR(-ENODEV); |
8c2f7e86 | 1744 | } else if (is_namespace_blk(&ndns->dev)) { |
047fc8a1 RZ |
1745 | struct nd_namespace_blk *nsblk; |
1746 | ||
1747 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
bd26d0d0 DK |
1748 | if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__)) |
1749 | return ERR_PTR(-ENODEV); | |
1750 | if (!nsblk->lbasize) { | |
426824d6 | 1751 | dev_dbg(&ndns->dev, "sector size not set\n"); |
bd26d0d0 DK |
1752 | return ERR_PTR(-ENODEV); |
1753 | } | |
047fc8a1 RZ |
1754 | if (!nd_namespace_blk_validate(nsblk)) |
1755 | return ERR_PTR(-ENODEV); | |
8c2f7e86 DW |
1756 | } |
1757 | ||
1758 | return ndns; | |
1759 | } | |
1760 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); | |
1761 | ||
3d88002e DW |
1762 | static struct device **create_namespace_io(struct nd_region *nd_region) |
1763 | { | |
1764 | struct nd_namespace_io *nsio; | |
1765 | struct device *dev, **devs; | |
1766 | struct resource *res; | |
1767 | ||
1768 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); | |
1769 | if (!nsio) | |
1770 | return NULL; | |
1771 | ||
1772 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1773 | if (!devs) { | |
1774 | kfree(nsio); | |
1775 | return NULL; | |
1776 | } | |
1777 | ||
8c2f7e86 | 1778 | dev = &nsio->common.dev; |
3d88002e DW |
1779 | dev->type = &namespace_io_device_type; |
1780 | dev->parent = &nd_region->dev; | |
1781 | res = &nsio->res; | |
1782 | res->name = dev_name(&nd_region->dev); | |
1783 | res->flags = IORESOURCE_MEM; | |
1784 | res->start = nd_region->ndr_start; | |
1785 | res->end = res->start + nd_region->ndr_size - 1; | |
1786 | ||
1787 | devs[0] = dev; | |
1788 | return devs; | |
1789 | } | |
1790 | ||
bf9bccc1 DW |
1791 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
1792 | u64 cookie, u16 pos) | |
1793 | { | |
1794 | struct nd_namespace_label *found = NULL; | |
1795 | int i; | |
1796 | ||
1797 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1798 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
faec6f8a DW |
1799 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
1800 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
ae8219f1 | 1801 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1802 | bool found_uuid = false; |
bf9bccc1 | 1803 | |
ae8219f1 DW |
1804 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1805 | struct nd_namespace_label *nd_label = label_ent->label; | |
1806 | u16 position, nlabel; | |
1807 | u64 isetcookie; | |
1808 | ||
1809 | if (!nd_label) | |
1810 | continue; | |
1811 | isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1812 | position = __le16_to_cpu(nd_label->position); | |
1813 | nlabel = __le16_to_cpu(nd_label->nlabel); | |
bf9bccc1 DW |
1814 | |
1815 | if (isetcookie != cookie) | |
1816 | continue; | |
1817 | ||
1818 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1819 | continue; | |
1820 | ||
faec6f8a DW |
1821 | if (namespace_label_has(ndd, type_guid) |
1822 | && !guid_equal(&nd_set->type_guid, | |
1823 | &nd_label->type_guid)) { | |
1824 | dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", | |
db5d00c9 AS |
1825 | &nd_set->type_guid, |
1826 | &nd_label->type_guid); | |
faec6f8a DW |
1827 | continue; |
1828 | } | |
1829 | ||
bf9bccc1 | 1830 | if (found_uuid) { |
426824d6 | 1831 | dev_dbg(ndd->dev, "duplicate entry for uuid\n"); |
bf9bccc1 DW |
1832 | return false; |
1833 | } | |
1834 | found_uuid = true; | |
1835 | if (nlabel != nd_region->ndr_mappings) | |
1836 | continue; | |
1837 | if (position != pos) | |
1838 | continue; | |
1839 | found = nd_label; | |
1840 | break; | |
1841 | } | |
1842 | if (found) | |
1843 | break; | |
1844 | } | |
1845 | return found != NULL; | |
1846 | } | |
1847 | ||
1848 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) | |
1849 | { | |
bf9bccc1 DW |
1850 | int i; |
1851 | ||
1852 | if (!pmem_id) | |
1853 | return -ENODEV; | |
1854 | ||
1855 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1856 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
0e3b0d12 | 1857 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
ae8219f1 | 1858 | struct nd_namespace_label *nd_label = NULL; |
bf9bccc1 | 1859 | u64 hw_start, hw_end, pmem_start, pmem_end; |
ae8219f1 | 1860 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1861 | |
9cf8bd52 | 1862 | lockdep_assert_held(&nd_mapping->lock); |
ae8219f1 DW |
1863 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1864 | nd_label = label_ent->label; | |
1865 | if (!nd_label) | |
1866 | continue; | |
bf9bccc1 DW |
1867 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
1868 | break; | |
ae8219f1 DW |
1869 | nd_label = NULL; |
1870 | } | |
bf9bccc1 DW |
1871 | |
1872 | if (!nd_label) { | |
1873 | WARN_ON(1); | |
1874 | return -EINVAL; | |
1875 | } | |
1876 | ||
bf9bccc1 DW |
1877 | /* |
1878 | * Check that this label is compliant with the dpa | |
1879 | * range published in NFIT | |
1880 | */ | |
1881 | hw_start = nd_mapping->start; | |
1882 | hw_end = hw_start + nd_mapping->size; | |
ae8219f1 DW |
1883 | pmem_start = __le64_to_cpu(nd_label->dpa); |
1884 | pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize); | |
0e3b0d12 DW |
1885 | if (pmem_start >= hw_start && pmem_start < hw_end |
1886 | && pmem_end <= hw_end && pmem_end > hw_start) | |
bf9bccc1 | 1887 | /* pass */; |
0e3b0d12 DW |
1888 | else { |
1889 | dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n", | |
1890 | dev_name(ndd->dev), nd_label->uuid); | |
bf9bccc1 | 1891 | return -EINVAL; |
0e3b0d12 | 1892 | } |
bf9bccc1 | 1893 | |
8a5f50d3 DW |
1894 | /* move recently validated label to the front of the list */ |
1895 | list_move(&label_ent->list, &nd_mapping->labels); | |
bf9bccc1 DW |
1896 | } |
1897 | return 0; | |
1898 | } | |
1899 | ||
1900 | /** | |
8a5f50d3 | 1901 | * create_namespace_pmem - validate interleave set labelling, retrieve label0 |
bf9bccc1 | 1902 | * @nd_region: region with mappings to validate |
8a5f50d3 DW |
1903 | * @nspm: target namespace to create |
1904 | * @nd_label: target pmem namespace label to evaluate | |
bf9bccc1 | 1905 | */ |
65853a1d | 1906 | static struct device *create_namespace_pmem(struct nd_region *nd_region, |
c12c48ce | 1907 | struct nd_namespace_index *nsindex, |
8a5f50d3 | 1908 | struct nd_namespace_label *nd_label) |
bf9bccc1 | 1909 | { |
c12c48ce | 1910 | u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
86ef58a4 | 1911 | u64 altcookie = nd_region_interleave_set_altcookie(nd_region); |
ae8219f1 | 1912 | struct nd_label_ent *label_ent; |
8a5f50d3 | 1913 | struct nd_namespace_pmem *nspm; |
ae8219f1 | 1914 | struct nd_mapping *nd_mapping; |
bf9bccc1 | 1915 | resource_size_t size = 0; |
8a5f50d3 DW |
1916 | struct resource *res; |
1917 | struct device *dev; | |
ae8219f1 | 1918 | int rc = 0; |
bf9bccc1 DW |
1919 | u16 i; |
1920 | ||
4765218d DW |
1921 | if (cookie == 0) { |
1922 | dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); | |
8a5f50d3 | 1923 | return ERR_PTR(-ENXIO); |
4765218d | 1924 | } |
bf9bccc1 | 1925 | |
8a5f50d3 DW |
1926 | if (__le64_to_cpu(nd_label->isetcookie) != cookie) { |
1927 | dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", | |
1928 | nd_label->uuid); | |
86ef58a4 DW |
1929 | if (__le64_to_cpu(nd_label->isetcookie) != altcookie) |
1930 | return ERR_PTR(-EAGAIN); | |
1931 | ||
1932 | dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n", | |
1933 | nd_label->uuid); | |
ae8219f1 | 1934 | } |
bf9bccc1 | 1935 | |
8a5f50d3 DW |
1936 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
1937 | if (!nspm) | |
1938 | return ERR_PTR(-ENOMEM); | |
ae8219f1 | 1939 | |
0e3b0d12 | 1940 | nspm->id = -1; |
8a5f50d3 DW |
1941 | dev = &nspm->nsio.common.dev; |
1942 | dev->type = &namespace_pmem_device_type; | |
1943 | dev->parent = &nd_region->dev; | |
1944 | res = &nspm->nsio.res; | |
1945 | res->name = dev_name(&nd_region->dev); | |
1946 | res->flags = IORESOURCE_MEM; | |
ae8219f1 | 1947 | |
86ef58a4 DW |
1948 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
1949 | if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) | |
1950 | continue; | |
1951 | if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i)) | |
1952 | continue; | |
1953 | break; | |
1954 | } | |
1955 | ||
8a5f50d3 | 1956 | if (i < nd_region->ndr_mappings) { |
4f867220 | 1957 | struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm; |
0e3b0d12 | 1958 | |
8a5f50d3 DW |
1959 | /* |
1960 | * Give up if we don't find an instance of a uuid at each | |
1961 | * position (from 0 to nd_region->ndr_mappings - 1), or if we | |
1962 | * find a dimm with two instances of the same uuid. | |
1963 | */ | |
0e3b0d12 | 1964 | dev_err(&nd_region->dev, "%s missing label for %pUb\n", |
4f867220 | 1965 | nvdimm_name(nvdimm), nd_label->uuid); |
8a5f50d3 | 1966 | rc = -EINVAL; |
ae8219f1 | 1967 | goto err; |
8a5f50d3 | 1968 | } |
bf9bccc1 DW |
1969 | |
1970 | /* | |
1971 | * Fix up each mapping's 'labels' to have the validated pmem label for | |
1972 | * that position at labels[0], and NULL at labels[1]. In the process, | |
1973 | * check that the namespace aligns with interleave-set. We know | |
1974 | * that it does not overlap with any blk namespaces by virtue of | |
1975 | * the dimm being enabled (i.e. nd_label_reserve_dpa() | |
1976 | * succeeded). | |
1977 | */ | |
8a5f50d3 | 1978 | rc = select_pmem_id(nd_region, nd_label->uuid); |
bf9bccc1 DW |
1979 | if (rc) |
1980 | goto err; | |
1981 | ||
1982 | /* Calculate total size and populate namespace properties from label0 */ | |
1983 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
ae8219f1 | 1984 | struct nd_namespace_label *label0; |
b3fde74e | 1985 | struct nvdimm_drvdata *ndd; |
ae8219f1 DW |
1986 | |
1987 | nd_mapping = &nd_region->mapping[i]; | |
ae8219f1 DW |
1988 | label_ent = list_first_entry_or_null(&nd_mapping->labels, |
1989 | typeof(*label_ent), list); | |
86aa6668 | 1990 | label0 = label_ent ? label_ent->label : NULL; |
ae8219f1 DW |
1991 | |
1992 | if (!label0) { | |
1993 | WARN_ON(1); | |
1994 | continue; | |
1995 | } | |
bf9bccc1 DW |
1996 | |
1997 | size += __le64_to_cpu(label0->rawsize); | |
1998 | if (__le16_to_cpu(label0->position) != 0) | |
1999 | continue; | |
2000 | WARN_ON(nspm->alt_name || nspm->uuid); | |
2001 | nspm->alt_name = kmemdup((void __force *) label0->name, | |
2002 | NSLABEL_NAME_LEN, GFP_KERNEL); | |
2003 | nspm->uuid = kmemdup((void __force *) label0->uuid, | |
2004 | NSLABEL_UUID_LEN, GFP_KERNEL); | |
f979b13c | 2005 | nspm->lbasize = __le64_to_cpu(label0->lbasize); |
b3fde74e DW |
2006 | ndd = to_ndd(nd_mapping); |
2007 | if (namespace_label_has(ndd, abstraction_guid)) | |
2008 | nspm->nsio.common.claim_class | |
2009 | = to_nvdimm_cclass(&label0->abstraction_guid); | |
2010 | ||
bf9bccc1 DW |
2011 | } |
2012 | ||
2013 | if (!nspm->alt_name || !nspm->uuid) { | |
2014 | rc = -ENOMEM; | |
2015 | goto err; | |
2016 | } | |
2017 | ||
0e3b0d12 | 2018 | nd_namespace_pmem_set_resource(nd_region, nspm, size); |
bf9bccc1 | 2019 | |
8a5f50d3 | 2020 | return dev; |
bf9bccc1 | 2021 | err: |
8a5f50d3 | 2022 | namespace_pmem_release(dev); |
bf9bccc1 DW |
2023 | switch (rc) { |
2024 | case -EINVAL: | |
426824d6 | 2025 | dev_dbg(&nd_region->dev, "invalid label(s)\n"); |
bf9bccc1 DW |
2026 | break; |
2027 | case -ENODEV: | |
426824d6 | 2028 | dev_dbg(&nd_region->dev, "label not found\n"); |
bf9bccc1 DW |
2029 | break; |
2030 | default: | |
426824d6 | 2031 | dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc); |
bf9bccc1 DW |
2032 | break; |
2033 | } | |
8a5f50d3 | 2034 | return ERR_PTR(rc); |
bf9bccc1 DW |
2035 | } |
2036 | ||
1b40e09a DW |
2037 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
2038 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, | |
2039 | resource_size_t start) | |
2040 | { | |
2041 | struct nd_label_id label_id; | |
2042 | struct resource *res; | |
2043 | ||
2044 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
2045 | res = krealloc(nsblk->res, | |
2046 | sizeof(void *) * (nsblk->num_resources + 1), | |
2047 | GFP_KERNEL); | |
2048 | if (!res) | |
2049 | return NULL; | |
2050 | nsblk->res = (struct resource **) res; | |
2051 | for_each_dpa_resource(ndd, res) | |
2052 | if (strcmp(res->name, label_id.id) == 0 | |
2053 | && res->start == start) { | |
2054 | nsblk->res[nsblk->num_resources++] = res; | |
2055 | return res; | |
2056 | } | |
2057 | return NULL; | |
2058 | } | |
2059 | ||
2060 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) | |
2061 | { | |
2062 | struct nd_namespace_blk *nsblk; | |
2063 | struct device *dev; | |
2064 | ||
2065 | if (!is_nd_blk(&nd_region->dev)) | |
2066 | return NULL; | |
2067 | ||
2068 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2069 | if (!nsblk) | |
2070 | return NULL; | |
2071 | ||
8c2f7e86 | 2072 | dev = &nsblk->common.dev; |
1b40e09a DW |
2073 | dev->type = &namespace_blk_device_type; |
2074 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
2075 | if (nsblk->id < 0) { | |
2076 | kfree(nsblk); | |
2077 | return NULL; | |
2078 | } | |
2079 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); | |
2080 | dev->parent = &nd_region->dev; | |
2081 | dev->groups = nd_namespace_attribute_groups; | |
2082 | ||
8c2f7e86 | 2083 | return &nsblk->common.dev; |
1b40e09a DW |
2084 | } |
2085 | ||
98a29c39 DW |
2086 | static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) |
2087 | { | |
2088 | struct nd_namespace_pmem *nspm; | |
2089 | struct resource *res; | |
2090 | struct device *dev; | |
2091 | ||
c9e582aa | 2092 | if (!is_memory(&nd_region->dev)) |
98a29c39 DW |
2093 | return NULL; |
2094 | ||
2095 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2096 | if (!nspm) | |
2097 | return NULL; | |
2098 | ||
2099 | dev = &nspm->nsio.common.dev; | |
2100 | dev->type = &namespace_pmem_device_type; | |
2101 | dev->parent = &nd_region->dev; | |
2102 | res = &nspm->nsio.res; | |
2103 | res->name = dev_name(&nd_region->dev); | |
2104 | res->flags = IORESOURCE_MEM; | |
2105 | ||
2106 | nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
2107 | if (nspm->id < 0) { | |
2108 | kfree(nspm); | |
2109 | return NULL; | |
2110 | } | |
2111 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id); | |
98a29c39 DW |
2112 | dev->groups = nd_namespace_attribute_groups; |
2113 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); | |
2114 | ||
2115 | return dev; | |
2116 | } | |
2117 | ||
2118 | void nd_region_create_ns_seed(struct nd_region *nd_region) | |
1b40e09a DW |
2119 | { |
2120 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
98a29c39 DW |
2121 | |
2122 | if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) | |
2123 | return; | |
2124 | ||
2125 | if (is_nd_blk(&nd_region->dev)) | |
2126 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); | |
2127 | else | |
2128 | nd_region->ns_seed = nd_namespace_pmem_create(nd_region); | |
2129 | ||
1b40e09a DW |
2130 | /* |
2131 | * Seed creation failures are not fatal, provisioning is simply | |
2132 | * disabled until memory becomes available | |
2133 | */ | |
2134 | if (!nd_region->ns_seed) | |
98a29c39 DW |
2135 | dev_err(&nd_region->dev, "failed to create %s namespace\n", |
2136 | is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); | |
1b40e09a DW |
2137 | else |
2138 | nd_device_register(nd_region->ns_seed); | |
2139 | } | |
2140 | ||
cd03412a DW |
2141 | void nd_region_create_dax_seed(struct nd_region *nd_region) |
2142 | { | |
2143 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2144 | nd_region->dax_seed = nd_dax_create(nd_region); | |
2145 | /* | |
2146 | * Seed creation failures are not fatal, provisioning is simply | |
2147 | * disabled until memory becomes available | |
2148 | */ | |
2149 | if (!nd_region->dax_seed) | |
2150 | dev_err(&nd_region->dev, "failed to create dax namespace\n"); | |
2151 | } | |
2152 | ||
2dc43331 DW |
2153 | void nd_region_create_pfn_seed(struct nd_region *nd_region) |
2154 | { | |
2155 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2156 | nd_region->pfn_seed = nd_pfn_create(nd_region); | |
2157 | /* | |
2158 | * Seed creation failures are not fatal, provisioning is simply | |
2159 | * disabled until memory becomes available | |
2160 | */ | |
2161 | if (!nd_region->pfn_seed) | |
2162 | dev_err(&nd_region->dev, "failed to create pfn namespace\n"); | |
2163 | } | |
2164 | ||
8c2f7e86 DW |
2165 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
2166 | { | |
2167 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2168 | nd_region->btt_seed = nd_btt_create(nd_region); | |
2169 | /* | |
2170 | * Seed creation failures are not fatal, provisioning is simply | |
2171 | * disabled until memory becomes available | |
2172 | */ | |
2173 | if (!nd_region->btt_seed) | |
2174 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); | |
2175 | } | |
2176 | ||
8a5f50d3 DW |
2177 | static int add_namespace_resource(struct nd_region *nd_region, |
2178 | struct nd_namespace_label *nd_label, struct device **devs, | |
2179 | int count) | |
1b40e09a | 2180 | { |
8a5f50d3 DW |
2181 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
2182 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2183 | int i; | |
2184 | ||
2185 | for (i = 0; i < count; i++) { | |
2186 | u8 *uuid = namespace_to_uuid(devs[i]); | |
2187 | struct resource *res; | |
2188 | ||
2189 | if (IS_ERR_OR_NULL(uuid)) { | |
2190 | WARN_ON(1); | |
2191 | continue; | |
2192 | } | |
2193 | ||
2194 | if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0) | |
2195 | continue; | |
2196 | if (is_namespace_blk(devs[i])) { | |
2197 | res = nsblk_add_resource(nd_region, ndd, | |
2198 | to_nd_namespace_blk(devs[i]), | |
2199 | __le64_to_cpu(nd_label->dpa)); | |
2200 | if (!res) | |
2201 | return -ENXIO; | |
2202 | nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count); | |
2203 | } else { | |
2204 | dev_err(&nd_region->dev, | |
2205 | "error: conflicting extents for uuid: %pUb\n", | |
2206 | nd_label->uuid); | |
2207 | return -ENXIO; | |
2208 | } | |
2209 | break; | |
2210 | } | |
2211 | ||
2212 | return i; | |
2213 | } | |
2214 | ||
65853a1d | 2215 | static struct device *create_namespace_blk(struct nd_region *nd_region, |
8a5f50d3 DW |
2216 | struct nd_namespace_label *nd_label, int count) |
2217 | { | |
2218 | ||
2219 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
faec6f8a | 2220 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
ae8219f1 | 2221 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1b40e09a | 2222 | struct nd_namespace_blk *nsblk; |
238b323a | 2223 | char name[NSLABEL_NAME_LEN]; |
8a5f50d3 DW |
2224 | struct device *dev = NULL; |
2225 | struct resource *res; | |
2226 | ||
8f2bc243 DW |
2227 | if (namespace_label_has(ndd, type_guid)) { |
2228 | if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) { | |
2229 | dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", | |
db5d00c9 AS |
2230 | &nd_set->type_guid, |
2231 | &nd_label->type_guid); | |
8f2bc243 DW |
2232 | return ERR_PTR(-EAGAIN); |
2233 | } | |
2234 | ||
2235 | if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) { | |
2236 | dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", | |
2237 | nd_set->cookie2, | |
2238 | __le64_to_cpu(nd_label->isetcookie)); | |
2239 | return ERR_PTR(-EAGAIN); | |
2240 | } | |
faec6f8a DW |
2241 | } |
2242 | ||
8a5f50d3 DW |
2243 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
2244 | if (!nsblk) | |
2245 | return ERR_PTR(-ENOMEM); | |
2246 | dev = &nsblk->common.dev; | |
2247 | dev->type = &namespace_blk_device_type; | |
2248 | dev->parent = &nd_region->dev; | |
2249 | nsblk->id = -1; | |
2250 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); | |
2251 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, | |
2252 | GFP_KERNEL); | |
b3fde74e DW |
2253 | if (namespace_label_has(ndd, abstraction_guid)) |
2254 | nsblk->common.claim_class | |
2255 | = to_nvdimm_cclass(&nd_label->abstraction_guid); | |
8a5f50d3 DW |
2256 | if (!nsblk->uuid) |
2257 | goto blk_err; | |
2258 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); | |
55c1fc0a | 2259 | if (name[0]) { |
8a5f50d3 DW |
2260 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, |
2261 | GFP_KERNEL); | |
55c1fc0a KL |
2262 | if (!nsblk->alt_name) |
2263 | goto blk_err; | |
2264 | } | |
8a5f50d3 DW |
2265 | res = nsblk_add_resource(nd_region, ndd, nsblk, |
2266 | __le64_to_cpu(nd_label->dpa)); | |
2267 | if (!res) | |
2268 | goto blk_err; | |
2269 | nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count); | |
2270 | return dev; | |
2271 | blk_err: | |
2272 | namespace_blk_release(dev); | |
2273 | return ERR_PTR(-ENXIO); | |
2274 | } | |
2275 | ||
6ff3e912 DW |
2276 | static int cmp_dpa(const void *a, const void *b) |
2277 | { | |
2278 | const struct device *dev_a = *(const struct device **) a; | |
2279 | const struct device *dev_b = *(const struct device **) b; | |
2280 | struct nd_namespace_blk *nsblk_a, *nsblk_b; | |
2281 | struct nd_namespace_pmem *nspm_a, *nspm_b; | |
2282 | ||
2283 | if (is_namespace_io(dev_a)) | |
2284 | return 0; | |
2285 | ||
2286 | if (is_namespace_blk(dev_a)) { | |
2287 | nsblk_a = to_nd_namespace_blk(dev_a); | |
2288 | nsblk_b = to_nd_namespace_blk(dev_b); | |
2289 | ||
2290 | return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start, | |
2291 | sizeof(resource_size_t)); | |
2292 | } | |
2293 | ||
2294 | nspm_a = to_nd_namespace_pmem(dev_a); | |
2295 | nspm_b = to_nd_namespace_pmem(dev_b); | |
2296 | ||
2297 | return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start, | |
2298 | sizeof(resource_size_t)); | |
2299 | } | |
2300 | ||
8a5f50d3 DW |
2301 | static struct device **scan_labels(struct nd_region *nd_region) |
2302 | { | |
c969e24c | 2303 | int i, count = 0; |
8a5f50d3 DW |
2304 | struct device *dev, **devs = NULL; |
2305 | struct nd_label_ent *label_ent, *e; | |
c969e24c DW |
2306 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
2307 | resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; | |
1b40e09a | 2308 | |
8a5f50d3 DW |
2309 | /* "safe" because create_namespace_pmem() might list_move() label_ent */ |
2310 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
ae8219f1 | 2311 | struct nd_namespace_label *nd_label = label_ent->label; |
1b40e09a | 2312 | struct device **__devs; |
ae8219f1 | 2313 | u32 flags; |
1b40e09a | 2314 | |
ae8219f1 DW |
2315 | if (!nd_label) |
2316 | continue; | |
2317 | flags = __le32_to_cpu(nd_label->flags); | |
8a5f50d3 DW |
2318 | if (is_nd_blk(&nd_region->dev) |
2319 | == !!(flags & NSLABEL_FLAG_LOCAL)) | |
2320 | /* pass, region matches label type */; | |
1b40e09a DW |
2321 | else |
2322 | continue; | |
2323 | ||
c969e24c | 2324 | /* skip labels that describe extents outside of the region */ |
86aa6668 AK |
2325 | if (__le64_to_cpu(nd_label->dpa) < nd_mapping->start || |
2326 | __le64_to_cpu(nd_label->dpa) > map_end) | |
2327 | continue; | |
c969e24c | 2328 | |
8a5f50d3 DW |
2329 | i = add_namespace_resource(nd_region, nd_label, devs, count); |
2330 | if (i < 0) | |
2331 | goto err; | |
1b40e09a DW |
2332 | if (i < count) |
2333 | continue; | |
2334 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); | |
2335 | if (!__devs) | |
2336 | goto err; | |
2337 | memcpy(__devs, devs, sizeof(dev) * count); | |
2338 | kfree(devs); | |
2339 | devs = __devs; | |
2340 | ||
faec6f8a | 2341 | if (is_nd_blk(&nd_region->dev)) |
8a5f50d3 | 2342 | dev = create_namespace_blk(nd_region, nd_label, count); |
faec6f8a | 2343 | else { |
c12c48ce DW |
2344 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
2345 | struct nd_namespace_index *nsindex; | |
2346 | ||
2347 | nsindex = to_namespace_index(ndd, ndd->ns_current); | |
2348 | dev = create_namespace_pmem(nd_region, nsindex, nd_label); | |
8a5f50d3 | 2349 | } |
faec6f8a DW |
2350 | |
2351 | if (IS_ERR(dev)) { | |
2352 | switch (PTR_ERR(dev)) { | |
2353 | case -EAGAIN: | |
2354 | /* skip invalid labels */ | |
2355 | continue; | |
2356 | case -ENODEV: | |
2357 | /* fallthrough to seed creation */ | |
2358 | break; | |
2359 | default: | |
2360 | goto err; | |
2361 | } | |
2362 | } else | |
2363 | devs[count++] = dev; | |
2364 | ||
1b40e09a DW |
2365 | } |
2366 | ||
426824d6 DW |
2367 | dev_dbg(&nd_region->dev, "discovered %d %s namespace%s\n", |
2368 | count, is_nd_blk(&nd_region->dev) | |
8a5f50d3 | 2369 | ? "blk" : "pmem", count == 1 ? "" : "s"); |
1b40e09a DW |
2370 | |
2371 | if (count == 0) { | |
2372 | /* Publish a zero-sized namespace for userspace to configure. */ | |
ae8219f1 | 2373 | nd_mapping_free_labels(nd_mapping); |
1b40e09a DW |
2374 | |
2375 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); | |
2376 | if (!devs) | |
2377 | goto err; | |
8a5f50d3 DW |
2378 | if (is_nd_blk(&nd_region->dev)) { |
2379 | struct nd_namespace_blk *nsblk; | |
2380 | ||
2381 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2382 | if (!nsblk) | |
2383 | goto err; | |
2384 | dev = &nsblk->common.dev; | |
2385 | dev->type = &namespace_blk_device_type; | |
2386 | } else { | |
2387 | struct nd_namespace_pmem *nspm; | |
2388 | ||
2389 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2390 | if (!nspm) | |
2391 | goto err; | |
2392 | dev = &nspm->nsio.common.dev; | |
2393 | dev->type = &namespace_pmem_device_type; | |
0e3b0d12 | 2394 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
8a5f50d3 | 2395 | } |
1b40e09a DW |
2396 | dev->parent = &nd_region->dev; |
2397 | devs[count++] = dev; | |
c9e582aa | 2398 | } else if (is_memory(&nd_region->dev)) { |
8a5f50d3 DW |
2399 | /* clean unselected labels */ |
2400 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
0e3b0d12 DW |
2401 | struct list_head *l, *e; |
2402 | LIST_HEAD(list); | |
2403 | int j; | |
2404 | ||
8a5f50d3 DW |
2405 | nd_mapping = &nd_region->mapping[i]; |
2406 | if (list_empty(&nd_mapping->labels)) { | |
2407 | WARN_ON(1); | |
2408 | continue; | |
2409 | } | |
0e3b0d12 DW |
2410 | |
2411 | j = count; | |
2412 | list_for_each_safe(l, e, &nd_mapping->labels) { | |
2413 | if (!j--) | |
2414 | break; | |
2415 | list_move_tail(l, &list); | |
2416 | } | |
8a5f50d3 | 2417 | nd_mapping_free_labels(nd_mapping); |
0e3b0d12 | 2418 | list_splice_init(&list, &nd_mapping->labels); |
8a5f50d3 | 2419 | } |
1b40e09a DW |
2420 | } |
2421 | ||
6ff3e912 DW |
2422 | if (count > 1) |
2423 | sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); | |
2424 | ||
1b40e09a DW |
2425 | return devs; |
2426 | ||
ae8219f1 | 2427 | err: |
75d29713 DC |
2428 | if (devs) { |
2429 | for (i = 0; devs[i]; i++) | |
2430 | if (is_nd_blk(&nd_region->dev)) | |
2431 | namespace_blk_release(devs[i]); | |
2432 | else | |
2433 | namespace_pmem_release(devs[i]); | |
2434 | kfree(devs); | |
2435 | } | |
1b40e09a DW |
2436 | return NULL; |
2437 | } | |
2438 | ||
8a5f50d3 | 2439 | static struct device **create_namespaces(struct nd_region *nd_region) |
ae8219f1 | 2440 | { |
59858d3d | 2441 | struct nd_mapping *nd_mapping; |
ae8219f1 | 2442 | struct device **devs; |
8a5f50d3 | 2443 | int i; |
ae8219f1 DW |
2444 | |
2445 | if (nd_region->ndr_mappings == 0) | |
2446 | return NULL; | |
2447 | ||
8a5f50d3 DW |
2448 | /* lock down all mappings while we scan labels */ |
2449 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2450 | nd_mapping = &nd_region->mapping[i]; | |
2451 | mutex_lock_nested(&nd_mapping->lock, i); | |
2452 | } | |
2453 | ||
2454 | devs = scan_labels(nd_region); | |
2455 | ||
2456 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2457 | int reverse = nd_region->ndr_mappings - 1 - i; | |
2458 | ||
2459 | nd_mapping = &nd_region->mapping[reverse]; | |
2460 | mutex_unlock(&nd_mapping->lock); | |
2461 | } | |
ae8219f1 DW |
2462 | |
2463 | return devs; | |
2464 | } | |
2465 | ||
a2d1c7a6 DW |
2466 | static void deactivate_labels(void *region) |
2467 | { | |
2468 | struct nd_region *nd_region = region; | |
2469 | int i; | |
2470 | ||
2471 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2472 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
2473 | struct nvdimm_drvdata *ndd = nd_mapping->ndd; | |
2474 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
2475 | ||
2476 | mutex_lock(&nd_mapping->lock); | |
2477 | nd_mapping_free_labels(nd_mapping); | |
2478 | mutex_unlock(&nd_mapping->lock); | |
2479 | ||
2480 | put_ndd(ndd); | |
2481 | nd_mapping->ndd = NULL; | |
2482 | if (ndd) | |
2483 | atomic_dec(&nvdimm->busy); | |
2484 | } | |
2485 | } | |
2486 | ||
bf9bccc1 DW |
2487 | static int init_active_labels(struct nd_region *nd_region) |
2488 | { | |
2489 | int i; | |
2490 | ||
2491 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2492 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
2493 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2494 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
ae8219f1 | 2495 | struct nd_label_ent *label_ent; |
bf9bccc1 DW |
2496 | int count, j; |
2497 | ||
2498 | /* | |
9d62ed96 DW |
2499 | * If the dimm is disabled then we may need to prevent |
2500 | * the region from being activated. | |
bf9bccc1 DW |
2501 | */ |
2502 | if (!ndd) { | |
9d62ed96 DW |
2503 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) |
2504 | /* fail, label data may be unreadable */; | |
2505 | else if (test_bit(NDD_ALIASING, &nvdimm->flags)) | |
2506 | /* fail, labels needed to disambiguate dpa */; | |
2507 | else | |
bf9bccc1 | 2508 | return 0; |
9d62ed96 DW |
2509 | |
2510 | dev_err(&nd_region->dev, "%s: is %s, failing probe\n", | |
2511 | dev_name(&nd_mapping->nvdimm->dev), | |
2512 | test_bit(NDD_LOCKED, &nvdimm->flags) | |
2513 | ? "locked" : "disabled"); | |
bf9bccc1 DW |
2514 | return -ENXIO; |
2515 | } | |
2516 | nd_mapping->ndd = ndd; | |
2517 | atomic_inc(&nvdimm->busy); | |
2518 | get_ndd(ndd); | |
2519 | ||
2520 | count = nd_label_active_count(ndd); | |
426824d6 | 2521 | dev_dbg(ndd->dev, "count: %d\n", count); |
bf9bccc1 DW |
2522 | if (!count) |
2523 | continue; | |
bf9bccc1 DW |
2524 | for (j = 0; j < count; j++) { |
2525 | struct nd_namespace_label *label; | |
2526 | ||
ae8219f1 DW |
2527 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); |
2528 | if (!label_ent) | |
2529 | break; | |
bf9bccc1 | 2530 | label = nd_label_active(ndd, j); |
d5d30d5a DW |
2531 | if (test_bit(NDD_NOBLK, &nvdimm->flags)) { |
2532 | u32 flags = __le32_to_cpu(label->flags); | |
2533 | ||
2534 | flags &= ~NSLABEL_FLAG_LOCAL; | |
2535 | label->flags = __cpu_to_le32(flags); | |
2536 | } | |
ae8219f1 DW |
2537 | label_ent->label = label; |
2538 | ||
2539 | mutex_lock(&nd_mapping->lock); | |
2540 | list_add_tail(&label_ent->list, &nd_mapping->labels); | |
2541 | mutex_unlock(&nd_mapping->lock); | |
bf9bccc1 | 2542 | } |
ae8219f1 | 2543 | |
a2d1c7a6 DW |
2544 | if (j < count) |
2545 | break; | |
2546 | } | |
ae8219f1 | 2547 | |
a2d1c7a6 DW |
2548 | if (i < nd_region->ndr_mappings) { |
2549 | deactivate_labels(nd_region); | |
ae8219f1 | 2550 | return -ENOMEM; |
bf9bccc1 DW |
2551 | } |
2552 | ||
a2d1c7a6 DW |
2553 | return devm_add_action_or_reset(&nd_region->dev, deactivate_labels, |
2554 | nd_region); | |
bf9bccc1 DW |
2555 | } |
2556 | ||
3d88002e DW |
2557 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
2558 | { | |
2559 | struct device **devs = NULL; | |
bf9bccc1 | 2560 | int i, rc = 0, type; |
3d88002e DW |
2561 | |
2562 | *err = 0; | |
bf9bccc1 DW |
2563 | nvdimm_bus_lock(&nd_region->dev); |
2564 | rc = init_active_labels(nd_region); | |
2565 | if (rc) { | |
2566 | nvdimm_bus_unlock(&nd_region->dev); | |
2567 | return rc; | |
2568 | } | |
2569 | ||
2570 | type = nd_region_to_nstype(nd_region); | |
2571 | switch (type) { | |
3d88002e DW |
2572 | case ND_DEVICE_NAMESPACE_IO: |
2573 | devs = create_namespace_io(nd_region); | |
2574 | break; | |
bf9bccc1 | 2575 | case ND_DEVICE_NAMESPACE_PMEM: |
1b40e09a | 2576 | case ND_DEVICE_NAMESPACE_BLK: |
8a5f50d3 | 2577 | devs = create_namespaces(nd_region); |
1b40e09a | 2578 | break; |
3d88002e DW |
2579 | default: |
2580 | break; | |
2581 | } | |
bf9bccc1 | 2582 | nvdimm_bus_unlock(&nd_region->dev); |
3d88002e DW |
2583 | |
2584 | if (!devs) | |
2585 | return -ENODEV; | |
2586 | ||
2587 | for (i = 0; devs[i]; i++) { | |
2588 | struct device *dev = devs[i]; | |
1b40e09a | 2589 | int id; |
3d88002e | 2590 | |
1b40e09a DW |
2591 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
2592 | struct nd_namespace_blk *nsblk; | |
2593 | ||
2594 | nsblk = to_nd_namespace_blk(dev); | |
2595 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2596 | GFP_KERNEL); | |
2597 | nsblk->id = id; | |
0e3b0d12 DW |
2598 | } else if (type == ND_DEVICE_NAMESPACE_PMEM) { |
2599 | struct nd_namespace_pmem *nspm; | |
2600 | ||
2601 | nspm = to_nd_namespace_pmem(dev); | |
2602 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2603 | GFP_KERNEL); | |
2604 | nspm->id = id; | |
1b40e09a DW |
2605 | } else |
2606 | id = i; | |
2607 | ||
2608 | if (id < 0) | |
2609 | break; | |
2610 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); | |
3d88002e DW |
2611 | dev->groups = nd_namespace_attribute_groups; |
2612 | nd_device_register(dev); | |
2613 | } | |
1b40e09a DW |
2614 | if (i) |
2615 | nd_region->ns_seed = devs[0]; | |
2616 | ||
2617 | if (devs[i]) { | |
2618 | int j; | |
2619 | ||
2620 | for (j = i; devs[j]; j++) { | |
2621 | struct device *dev = devs[j]; | |
2622 | ||
2623 | device_initialize(dev); | |
2624 | put_device(dev); | |
2625 | } | |
2626 | *err = j - i; | |
2627 | /* | |
2628 | * All of the namespaces we tried to register failed, so | |
2629 | * fail region activation. | |
2630 | */ | |
2631 | if (*err == 0) | |
2632 | rc = -ENODEV; | |
2633 | } | |
3d88002e DW |
2634 | kfree(devs); |
2635 | ||
1b40e09a DW |
2636 | if (rc == -ENODEV) |
2637 | return rc; | |
2638 | ||
3d88002e DW |
2639 | return i; |
2640 | } |