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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" |
6acd7d5e | 13 | #include "pfn.h" |
3d88002e DW |
14 | #include "nd.h" |
15 | ||
16 | static void namespace_io_release(struct device *dev) | |
17 | { | |
18 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
19 | ||
20 | kfree(nsio); | |
21 | } | |
22 | ||
bf9bccc1 DW |
23 | static void namespace_pmem_release(struct device *dev) |
24 | { | |
25 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0e3b0d12 | 26 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 | 27 | |
0e3b0d12 DW |
28 | if (nspm->id >= 0) |
29 | ida_simple_remove(&nd_region->ns_ida, nspm->id); | |
bf9bccc1 DW |
30 | kfree(nspm->alt_name); |
31 | kfree(nspm->uuid); | |
32 | kfree(nspm); | |
33 | } | |
34 | ||
35 | static void namespace_blk_release(struct device *dev) | |
36 | { | |
1b40e09a DW |
37 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
38 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
39 | ||
40 | if (nsblk->id >= 0) | |
41 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); | |
42 | kfree(nsblk->alt_name); | |
43 | kfree(nsblk->uuid); | |
44 | kfree(nsblk->res); | |
45 | kfree(nsblk); | |
bf9bccc1 DW |
46 | } |
47 | ||
78c81cc8 DW |
48 | static bool is_namespace_pmem(const struct device *dev); |
49 | static bool is_namespace_blk(const struct device *dev); | |
50 | static bool is_namespace_io(const struct device *dev); | |
bf9bccc1 | 51 | |
e07ecd76 DW |
52 | static int is_uuid_busy(struct device *dev, void *data) |
53 | { | |
54 | u8 *uuid1 = data, *uuid2 = NULL; | |
55 | ||
56 | if (is_namespace_pmem(dev)) { | |
57 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
58 | ||
59 | uuid2 = nspm->uuid; | |
60 | } else if (is_namespace_blk(dev)) { | |
61 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
62 | ||
63 | uuid2 = nsblk->uuid; | |
64 | } else if (is_nd_btt(dev)) { | |
65 | struct nd_btt *nd_btt = to_nd_btt(dev); | |
66 | ||
67 | uuid2 = nd_btt->uuid; | |
68 | } else if (is_nd_pfn(dev)) { | |
69 | struct nd_pfn *nd_pfn = to_nd_pfn(dev); | |
70 | ||
71 | uuid2 = nd_pfn->uuid; | |
72 | } | |
73 | ||
74 | if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0) | |
75 | return -EBUSY; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static int is_namespace_uuid_busy(struct device *dev, void *data) | |
81 | { | |
c9e582aa | 82 | if (is_nd_region(dev)) |
e07ecd76 DW |
83 | return device_for_each_child(dev, data, is_uuid_busy); |
84 | return 0; | |
85 | } | |
86 | ||
87 | /** | |
88 | * nd_is_uuid_unique - verify that no other namespace has @uuid | |
89 | * @dev: any device on a nvdimm_bus | |
90 | * @uuid: uuid to check | |
91 | */ | |
92 | bool nd_is_uuid_unique(struct device *dev, u8 *uuid) | |
93 | { | |
94 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
95 | ||
96 | if (!nvdimm_bus) | |
97 | return false; | |
98 | WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev)); | |
99 | if (device_for_each_child(&nvdimm_bus->dev, uuid, | |
100 | is_namespace_uuid_busy) != 0) | |
101 | return false; | |
102 | return true; | |
103 | } | |
104 | ||
004f1afb DW |
105 | bool pmem_should_map_pages(struct device *dev) |
106 | { | |
107 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
fa7d2e63 | 108 | struct nd_namespace_common *ndns = to_ndns(dev); |
cfe30b87 | 109 | struct nd_namespace_io *nsio; |
004f1afb DW |
110 | |
111 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) | |
112 | return false; | |
113 | ||
114 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) | |
115 | return false; | |
116 | ||
117 | if (is_nd_pfn(dev) || is_nd_btt(dev)) | |
118 | return false; | |
119 | ||
fa7d2e63 DW |
120 | if (ndns->force_raw) |
121 | return false; | |
122 | ||
cfe30b87 DW |
123 | nsio = to_nd_namespace_io(dev); |
124 | if (region_intersects(nsio->res.start, resource_size(&nsio->res), | |
125 | IORESOURCE_SYSTEM_RAM, | |
126 | IORES_DESC_NONE) == REGION_MIXED) | |
127 | return false; | |
128 | ||
004f1afb | 129 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; |
004f1afb DW |
130 | } |
131 | EXPORT_SYMBOL(pmem_should_map_pages); | |
132 | ||
f979b13c DW |
133 | unsigned int pmem_sector_size(struct nd_namespace_common *ndns) |
134 | { | |
135 | if (is_namespace_pmem(&ndns->dev)) { | |
136 | struct nd_namespace_pmem *nspm; | |
137 | ||
138 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
139 | if (nspm->lbasize == 0 || nspm->lbasize == 512) | |
140 | /* default */; | |
141 | else if (nspm->lbasize == 4096) | |
142 | return 4096; | |
143 | else | |
144 | dev_WARN(&ndns->dev, "unsupported sector size: %ld\n", | |
145 | nspm->lbasize); | |
146 | } | |
147 | ||
148 | /* | |
149 | * There is no namespace label (is_namespace_io()), or the label | |
150 | * indicates the default sector size. | |
151 | */ | |
152 | return 512; | |
153 | } | |
154 | EXPORT_SYMBOL(pmem_sector_size); | |
155 | ||
5212e11f VV |
156 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
157 | char *name) | |
158 | { | |
159 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
004f1afb | 160 | const char *suffix = NULL; |
5212e11f | 161 | |
0731de0d DW |
162 | if (ndns->claim && is_nd_btt(ndns->claim)) |
163 | suffix = "s"; | |
5212e11f | 164 | |
004f1afb | 165 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
01220733 DW |
166 | int nsidx = 0; |
167 | ||
168 | if (is_namespace_pmem(&ndns->dev)) { | |
169 | struct nd_namespace_pmem *nspm; | |
170 | ||
171 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
172 | nsidx = nspm->id; | |
173 | } | |
174 | ||
175 | if (nsidx) | |
176 | sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, | |
177 | suffix ? suffix : ""); | |
178 | else | |
179 | sprintf(name, "pmem%d%s", nd_region->id, | |
180 | suffix ? suffix : ""); | |
004f1afb | 181 | } else if (is_namespace_blk(&ndns->dev)) { |
5212e11f VV |
182 | struct nd_namespace_blk *nsblk; |
183 | ||
184 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
004f1afb DW |
185 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, |
186 | suffix ? suffix : ""); | |
5212e11f VV |
187 | } else { |
188 | return NULL; | |
189 | } | |
190 | ||
191 | return name; | |
192 | } | |
193 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); | |
194 | ||
6ec68954 VV |
195 | const u8 *nd_dev_to_uuid(struct device *dev) |
196 | { | |
197 | static const u8 null_uuid[16]; | |
198 | ||
199 | if (!dev) | |
200 | return null_uuid; | |
201 | ||
202 | if (is_namespace_pmem(dev)) { | |
203 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
204 | ||
205 | return nspm->uuid; | |
206 | } else if (is_namespace_blk(dev)) { | |
207 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
208 | ||
209 | return nsblk->uuid; | |
210 | } else | |
211 | return null_uuid; | |
212 | } | |
213 | EXPORT_SYMBOL(nd_dev_to_uuid); | |
214 | ||
3d88002e DW |
215 | static ssize_t nstype_show(struct device *dev, |
216 | struct device_attribute *attr, char *buf) | |
217 | { | |
218 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
219 | ||
220 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); | |
221 | } | |
222 | static DEVICE_ATTR_RO(nstype); | |
223 | ||
bf9bccc1 DW |
224 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
225 | const size_t len) | |
226 | { | |
227 | char *input, *pos, *alt_name, **ns_altname; | |
228 | ssize_t rc; | |
229 | ||
230 | if (is_namespace_pmem(dev)) { | |
231 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
232 | ||
233 | ns_altname = &nspm->alt_name; | |
234 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
235 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
236 | ||
237 | ns_altname = &nsblk->alt_name; | |
bf9bccc1 DW |
238 | } else |
239 | return -ENXIO; | |
240 | ||
8c2f7e86 | 241 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
242 | return -EBUSY; |
243 | ||
3d9cbe37 | 244 | input = kstrndup(buf, len, GFP_KERNEL); |
bf9bccc1 DW |
245 | if (!input) |
246 | return -ENOMEM; | |
247 | ||
bf9bccc1 DW |
248 | pos = strim(input); |
249 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { | |
250 | rc = -EINVAL; | |
251 | goto out; | |
252 | } | |
253 | ||
254 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); | |
255 | if (!alt_name) { | |
256 | rc = -ENOMEM; | |
257 | goto out; | |
258 | } | |
259 | kfree(*ns_altname); | |
260 | *ns_altname = alt_name; | |
261 | sprintf(*ns_altname, "%s", pos); | |
262 | rc = len; | |
263 | ||
264 | out: | |
265 | kfree(input); | |
266 | return rc; | |
267 | } | |
268 | ||
1b40e09a DW |
269 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
270 | { | |
8c2f7e86 | 271 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
1b40e09a DW |
272 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
273 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
274 | struct nd_label_id label_id; | |
275 | resource_size_t size = 0; | |
276 | struct resource *res; | |
277 | ||
278 | if (!nsblk->uuid) | |
279 | return 0; | |
280 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
281 | for_each_dpa_resource(ndd, res) | |
282 | if (strcmp(res->name, label_id.id) == 0) | |
283 | size += resource_size(res); | |
284 | return size; | |
285 | } | |
286 | ||
047fc8a1 RZ |
287 | static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
288 | { | |
289 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); | |
290 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
291 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
292 | struct nd_label_id label_id; | |
293 | struct resource *res; | |
294 | int count, i; | |
295 | ||
296 | if (!nsblk->uuid || !nsblk->lbasize || !ndd) | |
297 | return false; | |
298 | ||
299 | count = 0; | |
300 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
301 | for_each_dpa_resource(ndd, res) { | |
302 | if (strcmp(res->name, label_id.id) != 0) | |
303 | continue; | |
304 | /* | |
ae551e9c | 305 | * Resources with unacknowledged adjustments indicate a |
047fc8a1 RZ |
306 | * failure to update labels |
307 | */ | |
308 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
309 | return false; | |
310 | count++; | |
311 | } | |
312 | ||
313 | /* These values match after a successful label update */ | |
314 | if (count != nsblk->num_resources) | |
315 | return false; | |
316 | ||
317 | for (i = 0; i < nsblk->num_resources; i++) { | |
318 | struct resource *found = NULL; | |
319 | ||
320 | for_each_dpa_resource(ndd, res) | |
321 | if (res == nsblk->res[i]) { | |
322 | found = res; | |
323 | break; | |
324 | } | |
325 | /* stale resource */ | |
326 | if (!found) | |
327 | return false; | |
328 | } | |
329 | ||
330 | return true; | |
331 | } | |
332 | ||
333 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) | |
334 | { | |
335 | resource_size_t size; | |
336 | ||
337 | nvdimm_bus_lock(&nsblk->common.dev); | |
338 | size = __nd_namespace_blk_validate(nsblk); | |
339 | nvdimm_bus_unlock(&nsblk->common.dev); | |
340 | ||
341 | return size; | |
342 | } | |
343 | EXPORT_SYMBOL(nd_namespace_blk_validate); | |
344 | ||
345 | ||
f524bf27 DW |
346 | static int nd_namespace_label_update(struct nd_region *nd_region, |
347 | struct device *dev) | |
348 | { | |
8c2f7e86 | 349 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
f524bf27 | 350 | "namespace must be idle during label update\n"); |
8c2f7e86 | 351 | if (dev->driver || to_ndns(dev)->claim) |
f524bf27 DW |
352 | return 0; |
353 | ||
354 | /* | |
355 | * Only allow label writes that will result in a valid namespace | |
356 | * or deletion of an existing namespace. | |
357 | */ | |
358 | if (is_namespace_pmem(dev)) { | |
359 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0ba1c634 | 360 | resource_size_t size = resource_size(&nspm->nsio.res); |
f524bf27 DW |
361 | |
362 | if (size == 0 && nspm->uuid) | |
363 | /* delete allocation */; | |
364 | else if (!nspm->uuid) | |
365 | return 0; | |
366 | ||
367 | return nd_pmem_namespace_label_update(nd_region, nspm, size); | |
368 | } else if (is_namespace_blk(dev)) { | |
0ba1c634 DW |
369 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
370 | resource_size_t size = nd_namespace_blk_size(nsblk); | |
371 | ||
372 | if (size == 0 && nsblk->uuid) | |
373 | /* delete allocation */; | |
374 | else if (!nsblk->uuid || !nsblk->lbasize) | |
375 | return 0; | |
376 | ||
377 | return nd_blk_namespace_label_update(nd_region, nsblk, size); | |
f524bf27 DW |
378 | } else |
379 | return -ENXIO; | |
380 | } | |
381 | ||
bf9bccc1 DW |
382 | static ssize_t alt_name_store(struct device *dev, |
383 | struct device_attribute *attr, const char *buf, size_t len) | |
384 | { | |
f524bf27 | 385 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
386 | ssize_t rc; |
387 | ||
87a30e1f | 388 | nd_device_lock(dev); |
bf9bccc1 DW |
389 | nvdimm_bus_lock(dev); |
390 | wait_nvdimm_bus_probe_idle(dev); | |
391 | rc = __alt_name_store(dev, buf, len); | |
f524bf27 DW |
392 | if (rc >= 0) |
393 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 | 394 | dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc); |
bf9bccc1 | 395 | nvdimm_bus_unlock(dev); |
87a30e1f | 396 | nd_device_unlock(dev); |
bf9bccc1 | 397 | |
f524bf27 | 398 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
399 | } |
400 | ||
401 | static ssize_t alt_name_show(struct device *dev, | |
402 | struct device_attribute *attr, char *buf) | |
403 | { | |
404 | char *ns_altname; | |
405 | ||
406 | if (is_namespace_pmem(dev)) { | |
407 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
408 | ||
409 | ns_altname = nspm->alt_name; | |
410 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
411 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
412 | ||
413 | ns_altname = nsblk->alt_name; | |
bf9bccc1 DW |
414 | } else |
415 | return -ENXIO; | |
416 | ||
417 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); | |
418 | } | |
419 | static DEVICE_ATTR_RW(alt_name); | |
420 | ||
421 | static int scan_free(struct nd_region *nd_region, | |
422 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
423 | resource_size_t n) | |
424 | { | |
425 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
426 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
427 | int rc = 0; | |
428 | ||
429 | while (n) { | |
430 | struct resource *res, *last; | |
431 | resource_size_t new_start; | |
432 | ||
433 | last = NULL; | |
434 | for_each_dpa_resource(ndd, res) | |
435 | if (strcmp(res->name, label_id->id) == 0) | |
436 | last = res; | |
437 | res = last; | |
438 | if (!res) | |
439 | return 0; | |
440 | ||
441 | if (n >= resource_size(res)) { | |
442 | n -= resource_size(res); | |
443 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); | |
444 | nvdimm_free_dpa(ndd, res); | |
445 | /* retry with last resource deleted */ | |
446 | continue; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Keep BLK allocations relegated to high DPA as much as | |
451 | * possible | |
452 | */ | |
453 | if (is_blk) | |
454 | new_start = res->start + n; | |
455 | else | |
456 | new_start = res->start; | |
457 | ||
458 | rc = adjust_resource(res, new_start, resource_size(res) - n); | |
1b40e09a DW |
459 | if (rc == 0) |
460 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
461 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
462 | break; | |
463 | } | |
464 | ||
465 | return rc; | |
466 | } | |
467 | ||
468 | /** | |
469 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id | |
470 | * @nd_region: the set of dimms to reclaim @n bytes from | |
471 | * @label_id: unique identifier for the namespace consuming this dpa range | |
472 | * @n: number of bytes per-dimm to release | |
473 | * | |
474 | * Assumes resources are ordered. Starting from the end try to | |
475 | * adjust_resource() the allocation to @n, but if @n is larger than the | |
476 | * allocation delete it and find the 'new' last allocation in the label | |
477 | * set. | |
478 | */ | |
479 | static int shrink_dpa_allocation(struct nd_region *nd_region, | |
480 | struct nd_label_id *label_id, resource_size_t n) | |
481 | { | |
482 | int i; | |
483 | ||
484 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
485 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
486 | int rc; | |
487 | ||
488 | rc = scan_free(nd_region, nd_mapping, label_id, n); | |
489 | if (rc) | |
490 | return rc; | |
491 | } | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, | |
497 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, | |
498 | resource_size_t n) | |
499 | { | |
500 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
501 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
502 | resource_size_t first_dpa; | |
503 | struct resource *res; | |
504 | int rc = 0; | |
505 | ||
506 | /* allocate blk from highest dpa first */ | |
507 | if (is_blk) | |
508 | first_dpa = nd_mapping->start + nd_mapping->size - n; | |
509 | else | |
510 | first_dpa = nd_mapping->start; | |
511 | ||
512 | /* first resource allocation for this label-id or dimm */ | |
513 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); | |
514 | if (!res) | |
515 | rc = -EBUSY; | |
516 | ||
517 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); | |
518 | return rc ? n : 0; | |
519 | } | |
520 | ||
762d067d DW |
521 | |
522 | /** | |
523 | * space_valid() - validate free dpa space against constraints | |
524 | * @nd_region: hosting region of the free space | |
525 | * @ndd: dimm device data for debug | |
526 | * @label_id: namespace id to allocate space | |
527 | * @prev: potential allocation that precedes free space | |
528 | * @next: allocation that follows the given free space range | |
529 | * @exist: first allocation with same id in the mapping | |
530 | * @n: range that must satisfied for pmem allocations | |
531 | * @valid: free space range to validate | |
532 | * | |
533 | * BLK-space is valid as long as it does not precede a PMEM | |
534 | * allocation in a given region. PMEM-space must be contiguous | |
535 | * and adjacent to an existing existing allocation (if one | |
536 | * exists). If reserving PMEM any space is valid. | |
537 | */ | |
538 | static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, | |
539 | struct nd_label_id *label_id, struct resource *prev, | |
540 | struct resource *next, struct resource *exist, | |
541 | resource_size_t n, struct resource *valid) | |
bf9bccc1 | 542 | { |
762d067d DW |
543 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
544 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
2522afb8 DW |
545 | unsigned long align; |
546 | ||
547 | align = nd_region->align / nd_region->ndr_mappings; | |
548 | valid->start = ALIGN(valid->start, align); | |
549 | valid->end = ALIGN_DOWN(valid->end + 1, align) - 1; | |
762d067d DW |
550 | |
551 | if (valid->start >= valid->end) | |
552 | goto invalid; | |
553 | ||
554 | if (is_reserve) | |
555 | return; | |
556 | ||
557 | if (!is_pmem) { | |
558 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
559 | struct nvdimm_bus *nvdimm_bus; | |
560 | struct blk_alloc_info info = { | |
561 | .nd_mapping = nd_mapping, | |
562 | .available = nd_mapping->size, | |
563 | .res = valid, | |
564 | }; | |
565 | ||
566 | WARN_ON(!is_nd_blk(&nd_region->dev)); | |
567 | nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); | |
568 | device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); | |
569 | return; | |
570 | } | |
571 | ||
572 | /* allocation needs to be contiguous, so this is all or nothing */ | |
573 | if (resource_size(valid) < n) | |
574 | goto invalid; | |
575 | ||
576 | /* we've got all the space we need and no existing allocation */ | |
577 | if (!exist) | |
578 | return; | |
579 | ||
580 | /* allocation needs to be contiguous with the existing namespace */ | |
581 | if (valid->start == exist->end + 1 | |
582 | || valid->end == exist->start - 1) | |
583 | return; | |
584 | ||
585 | invalid: | |
586 | /* truncate @valid size to 0 */ | |
587 | valid->end = valid->start - 1; | |
bf9bccc1 DW |
588 | } |
589 | ||
590 | enum alloc_loc { | |
591 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, | |
592 | }; | |
593 | ||
594 | static resource_size_t scan_allocate(struct nd_region *nd_region, | |
595 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
596 | resource_size_t n) | |
597 | { | |
598 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; | |
599 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
600 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
762d067d | 601 | struct resource *res, *exist = NULL, valid; |
bf9bccc1 | 602 | const resource_size_t to_allocate = n; |
bf9bccc1 DW |
603 | int first; |
604 | ||
762d067d DW |
605 | for_each_dpa_resource(ndd, res) |
606 | if (strcmp(label_id->id, res->name) == 0) | |
607 | exist = res; | |
608 | ||
609 | valid.start = nd_mapping->start; | |
610 | valid.end = mapping_end; | |
611 | valid.name = "free space"; | |
bf9bccc1 DW |
612 | retry: |
613 | first = 0; | |
614 | for_each_dpa_resource(ndd, res) { | |
bf9bccc1 | 615 | struct resource *next = res->sibling, *new_res = NULL; |
762d067d | 616 | resource_size_t allocate, available = 0; |
bf9bccc1 DW |
617 | enum alloc_loc loc = ALLOC_ERR; |
618 | const char *action; | |
619 | int rc = 0; | |
620 | ||
621 | /* ignore resources outside this nd_mapping */ | |
622 | if (res->start > mapping_end) | |
623 | continue; | |
624 | if (res->end < nd_mapping->start) | |
625 | continue; | |
626 | ||
627 | /* space at the beginning of the mapping */ | |
628 | if (!first++ && res->start > nd_mapping->start) { | |
762d067d DW |
629 | valid.start = nd_mapping->start; |
630 | valid.end = res->start - 1; | |
631 | space_valid(nd_region, ndd, label_id, NULL, next, exist, | |
632 | to_allocate, &valid); | |
633 | available = resource_size(&valid); | |
634 | if (available) | |
bf9bccc1 DW |
635 | loc = ALLOC_BEFORE; |
636 | } | |
637 | ||
638 | /* space between allocations */ | |
639 | if (!loc && next) { | |
762d067d DW |
640 | valid.start = res->start + resource_size(res); |
641 | valid.end = min(mapping_end, next->start - 1); | |
642 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
643 | to_allocate, &valid); | |
644 | available = resource_size(&valid); | |
645 | if (available) | |
bf9bccc1 | 646 | loc = ALLOC_MID; |
bf9bccc1 DW |
647 | } |
648 | ||
649 | /* space at the end of the mapping */ | |
650 | if (!loc && !next) { | |
762d067d DW |
651 | valid.start = res->start + resource_size(res); |
652 | valid.end = mapping_end; | |
653 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
654 | to_allocate, &valid); | |
655 | available = resource_size(&valid); | |
656 | if (available) | |
bf9bccc1 | 657 | loc = ALLOC_AFTER; |
bf9bccc1 DW |
658 | } |
659 | ||
660 | if (!loc || !available) | |
661 | continue; | |
662 | allocate = min(available, n); | |
663 | switch (loc) { | |
664 | case ALLOC_BEFORE: | |
665 | if (strcmp(res->name, label_id->id) == 0) { | |
666 | /* adjust current resource up */ | |
bf9bccc1 DW |
667 | rc = adjust_resource(res, res->start - allocate, |
668 | resource_size(res) + allocate); | |
669 | action = "cur grow up"; | |
670 | } else | |
671 | action = "allocate"; | |
672 | break; | |
673 | case ALLOC_MID: | |
674 | if (strcmp(next->name, label_id->id) == 0) { | |
675 | /* adjust next resource up */ | |
bf9bccc1 DW |
676 | rc = adjust_resource(next, next->start |
677 | - allocate, resource_size(next) | |
678 | + allocate); | |
679 | new_res = next; | |
680 | action = "next grow up"; | |
681 | } else if (strcmp(res->name, label_id->id) == 0) { | |
682 | action = "grow down"; | |
683 | } else | |
684 | action = "allocate"; | |
685 | break; | |
686 | case ALLOC_AFTER: | |
687 | if (strcmp(res->name, label_id->id) == 0) | |
688 | action = "grow down"; | |
689 | else | |
690 | action = "allocate"; | |
691 | break; | |
692 | default: | |
693 | return n; | |
694 | } | |
695 | ||
696 | if (strcmp(action, "allocate") == 0) { | |
697 | /* BLK allocate bottom up */ | |
698 | if (!is_pmem) | |
762d067d | 699 | valid.start += available - allocate; |
bf9bccc1 DW |
700 | |
701 | new_res = nvdimm_allocate_dpa(ndd, label_id, | |
762d067d | 702 | valid.start, allocate); |
bf9bccc1 DW |
703 | if (!new_res) |
704 | rc = -EBUSY; | |
705 | } else if (strcmp(action, "grow down") == 0) { | |
706 | /* adjust current resource down */ | |
707 | rc = adjust_resource(res, res->start, resource_size(res) | |
708 | + allocate); | |
1b40e09a DW |
709 | if (rc == 0) |
710 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
711 | } |
712 | ||
713 | if (!new_res) | |
714 | new_res = res; | |
715 | ||
716 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", | |
717 | action, loc, rc); | |
718 | ||
719 | if (rc) | |
720 | return n; | |
721 | ||
722 | n -= allocate; | |
723 | if (n) { | |
724 | /* | |
725 | * Retry scan with newly inserted resources. | |
726 | * For example, if we did an ALLOC_BEFORE | |
727 | * insertion there may also have been space | |
728 | * available for an ALLOC_AFTER insertion, so we | |
729 | * need to check this same resource again | |
730 | */ | |
731 | goto retry; | |
732 | } else | |
733 | return 0; | |
734 | } | |
735 | ||
1b40e09a DW |
736 | /* |
737 | * If we allocated nothing in the BLK case it may be because we are in | |
738 | * an initial "pmem-reserve pass". Only do an initial BLK allocation | |
739 | * when none of the DPA space is reserved. | |
740 | */ | |
741 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) | |
bf9bccc1 DW |
742 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
743 | return n; | |
744 | } | |
745 | ||
1b40e09a DW |
746 | static int merge_dpa(struct nd_region *nd_region, |
747 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) | |
748 | { | |
749 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
750 | struct resource *res; | |
751 | ||
752 | if (strncmp("pmem", label_id->id, 4) == 0) | |
753 | return 0; | |
754 | retry: | |
755 | for_each_dpa_resource(ndd, res) { | |
756 | int rc; | |
757 | struct resource *next = res->sibling; | |
758 | resource_size_t end = res->start + resource_size(res); | |
759 | ||
760 | if (!next || strcmp(res->name, label_id->id) != 0 | |
761 | || strcmp(next->name, label_id->id) != 0 | |
762 | || end != next->start) | |
763 | continue; | |
764 | end += resource_size(next); | |
765 | nvdimm_free_dpa(ndd, next); | |
766 | rc = adjust_resource(res, res->start, end - res->start); | |
767 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); | |
768 | if (rc) | |
769 | return rc; | |
770 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
771 | goto retry; | |
772 | } | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
12e3129e | 777 | int __reserve_free_pmem(struct device *dev, void *data) |
1b40e09a DW |
778 | { |
779 | struct nvdimm *nvdimm = data; | |
780 | struct nd_region *nd_region; | |
781 | struct nd_label_id label_id; | |
782 | int i; | |
783 | ||
c9e582aa | 784 | if (!is_memory(dev)) |
1b40e09a DW |
785 | return 0; |
786 | ||
787 | nd_region = to_nd_region(dev); | |
788 | if (nd_region->ndr_mappings == 0) | |
789 | return 0; | |
790 | ||
791 | memset(&label_id, 0, sizeof(label_id)); | |
792 | strcat(label_id.id, "pmem-reserve"); | |
793 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
794 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
795 | resource_size_t n, rem = 0; | |
796 | ||
797 | if (nd_mapping->nvdimm != nvdimm) | |
798 | continue; | |
799 | ||
800 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); | |
801 | if (n == 0) | |
802 | return 0; | |
803 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); | |
804 | dev_WARN_ONCE(&nd_region->dev, rem, | |
805 | "pmem reserve underrun: %#llx of %#llx bytes\n", | |
806 | (unsigned long long) n - rem, | |
807 | (unsigned long long) n); | |
808 | return rem ? -ENXIO : 0; | |
809 | } | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
12e3129e | 814 | void release_free_pmem(struct nvdimm_bus *nvdimm_bus, |
1b40e09a DW |
815 | struct nd_mapping *nd_mapping) |
816 | { | |
817 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
818 | struct resource *res, *_res; | |
819 | ||
820 | for_each_dpa_resource_safe(ndd, res, _res) | |
821 | if (strcmp(res->name, "pmem-reserve") == 0) | |
822 | nvdimm_free_dpa(ndd, res); | |
823 | } | |
824 | ||
825 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
826 | struct nd_mapping *nd_mapping) | |
827 | { | |
828 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
829 | int rc; | |
830 | ||
831 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, | |
832 | __reserve_free_pmem); | |
833 | if (rc) | |
834 | release_free_pmem(nvdimm_bus, nd_mapping); | |
835 | return rc; | |
836 | } | |
837 | ||
bf9bccc1 DW |
838 | /** |
839 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id | |
840 | * @nd_region: the set of dimms to allocate @n more bytes from | |
841 | * @label_id: unique identifier for the namespace consuming this dpa range | |
842 | * @n: number of bytes per-dimm to add to the existing allocation | |
843 | * | |
844 | * Assumes resources are ordered. For BLK regions, first consume | |
845 | * BLK-only available DPA free space, then consume PMEM-aliased DPA | |
846 | * space starting at the highest DPA. For PMEM regions start | |
847 | * allocations from the start of an interleave set and end at the first | |
848 | * BLK allocation or the end of the interleave set, whichever comes | |
849 | * first. | |
850 | */ | |
851 | static int grow_dpa_allocation(struct nd_region *nd_region, | |
852 | struct nd_label_id *label_id, resource_size_t n) | |
853 | { | |
1b40e09a DW |
854 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
855 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
bf9bccc1 DW |
856 | int i; |
857 | ||
858 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
859 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1b40e09a DW |
860 | resource_size_t rem = n; |
861 | int rc, j; | |
862 | ||
863 | /* | |
864 | * In the BLK case try once with all unallocated PMEM | |
865 | * reserved, and once without | |
866 | */ | |
867 | for (j = is_pmem; j < 2; j++) { | |
868 | bool blk_only = j == 0; | |
869 | ||
870 | if (blk_only) { | |
871 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); | |
872 | if (rc) | |
873 | return rc; | |
874 | } | |
875 | rem = scan_allocate(nd_region, nd_mapping, | |
876 | label_id, rem); | |
877 | if (blk_only) | |
878 | release_free_pmem(nvdimm_bus, nd_mapping); | |
bf9bccc1 | 879 | |
1b40e09a DW |
880 | /* try again and allow encroachments into PMEM */ |
881 | if (rem == 0) | |
882 | break; | |
883 | } | |
884 | ||
885 | dev_WARN_ONCE(&nd_region->dev, rem, | |
886 | "allocation underrun: %#llx of %#llx bytes\n", | |
887 | (unsigned long long) n - rem, | |
888 | (unsigned long long) n); | |
889 | if (rem) | |
890 | return -ENXIO; | |
891 | ||
892 | rc = merge_dpa(nd_region, nd_mapping, label_id); | |
bf9bccc1 DW |
893 | if (rc) |
894 | return rc; | |
895 | } | |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
0e3b0d12 | 900 | static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
bf9bccc1 DW |
901 | struct nd_namespace_pmem *nspm, resource_size_t size) |
902 | { | |
903 | struct resource *res = &nspm->nsio.res; | |
0e3b0d12 | 904 | resource_size_t offset = 0; |
bf9bccc1 | 905 | |
0e3b0d12 DW |
906 | if (size && !nspm->uuid) { |
907 | WARN_ON_ONCE(1); | |
908 | size = 0; | |
909 | } | |
910 | ||
911 | if (size && nspm->uuid) { | |
912 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
913 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
914 | struct nd_label_id label_id; | |
915 | struct resource *res; | |
916 | ||
917 | if (!ndd) { | |
918 | size = 0; | |
919 | goto out; | |
920 | } | |
921 | ||
922 | nd_label_gen_id(&label_id, nspm->uuid, 0); | |
923 | ||
924 | /* calculate a spa offset from the dpa allocation offset */ | |
925 | for_each_dpa_resource(ndd, res) | |
926 | if (strcmp(res->name, label_id.id) == 0) { | |
927 | offset = (res->start - nd_mapping->start) | |
928 | * nd_region->ndr_mappings; | |
929 | goto out; | |
930 | } | |
931 | ||
932 | WARN_ON_ONCE(1); | |
933 | size = 0; | |
934 | } | |
935 | ||
936 | out: | |
937 | res->start = nd_region->ndr_start + offset; | |
938 | res->end = res->start + size - 1; | |
bf9bccc1 DW |
939 | } |
940 | ||
bd26d0d0 DK |
941 | static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where) |
942 | { | |
943 | if (!uuid) { | |
944 | dev_dbg(dev, "%s: uuid not set\n", where); | |
945 | return true; | |
946 | } | |
947 | return false; | |
948 | } | |
949 | ||
bf9bccc1 DW |
950 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
951 | { | |
952 | resource_size_t allocated = 0, available = 0; | |
953 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1f19b983 | 954 | struct nd_namespace_common *ndns = to_ndns(dev); |
bf9bccc1 DW |
955 | struct nd_mapping *nd_mapping; |
956 | struct nvdimm_drvdata *ndd; | |
957 | struct nd_label_id label_id; | |
958 | u32 flags = 0, remainder; | |
9d032f42 | 959 | int rc, i, id = -1; |
bf9bccc1 | 960 | u8 *uuid = NULL; |
bf9bccc1 | 961 | |
1f19b983 | 962 | if (dev->driver || ndns->claim) |
bf9bccc1 DW |
963 | return -EBUSY; |
964 | ||
965 | if (is_namespace_pmem(dev)) { | |
966 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
967 | ||
968 | uuid = nspm->uuid; | |
9d032f42 | 969 | id = nspm->id; |
bf9bccc1 | 970 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
971 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
972 | ||
973 | uuid = nsblk->uuid; | |
974 | flags = NSLABEL_FLAG_LOCAL; | |
9d032f42 | 975 | id = nsblk->id; |
bf9bccc1 DW |
976 | } |
977 | ||
978 | /* | |
979 | * We need a uuid for the allocation-label and dimm(s) on which | |
980 | * to store the label. | |
981 | */ | |
bd26d0d0 | 982 | if (uuid_not_set(uuid, dev, __func__)) |
bf9bccc1 | 983 | return -ENXIO; |
bd26d0d0 | 984 | if (nd_region->ndr_mappings == 0) { |
426824d6 | 985 | dev_dbg(dev, "not associated with dimm(s)\n"); |
bd26d0d0 DK |
986 | return -ENXIO; |
987 | } | |
bf9bccc1 | 988 | |
2522afb8 | 989 | div_u64_rem(val, nd_region->align, &remainder); |
bf9bccc1 | 990 | if (remainder) { |
5b26db95 | 991 | dev_dbg(dev, "%llu is not %ldK aligned\n", val, |
2522afb8 | 992 | nd_region->align / SZ_1K); |
bf9bccc1 DW |
993 | return -EINVAL; |
994 | } | |
995 | ||
996 | nd_label_gen_id(&label_id, uuid, flags); | |
997 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
998 | nd_mapping = &nd_region->mapping[i]; | |
999 | ndd = to_ndd(nd_mapping); | |
1000 | ||
1001 | /* | |
1002 | * All dimms in an interleave set, or the base dimm for a blk | |
1003 | * region, need to be enabled for the size to be changed. | |
1004 | */ | |
1005 | if (!ndd) | |
1006 | return -ENXIO; | |
1007 | ||
1008 | allocated += nvdimm_allocated_dpa(ndd, &label_id); | |
1009 | } | |
12e3129e | 1010 | available = nd_region_allocatable_dpa(nd_region); |
bf9bccc1 DW |
1011 | |
1012 | if (val > available + allocated) | |
1013 | return -ENOSPC; | |
1014 | ||
1015 | if (val == allocated) | |
1016 | return 0; | |
1017 | ||
1018 | val = div_u64(val, nd_region->ndr_mappings); | |
1019 | allocated = div_u64(allocated, nd_region->ndr_mappings); | |
1020 | if (val < allocated) | |
1021 | rc = shrink_dpa_allocation(nd_region, &label_id, | |
1022 | allocated - val); | |
1023 | else | |
1024 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); | |
1025 | ||
1026 | if (rc) | |
1027 | return rc; | |
1028 | ||
1029 | if (is_namespace_pmem(dev)) { | |
1030 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1031 | ||
0e3b0d12 | 1032 | nd_namespace_pmem_set_resource(nd_region, nspm, |
bf9bccc1 DW |
1033 | val * nd_region->ndr_mappings); |
1034 | } | |
1035 | ||
1f19b983 DW |
1036 | /* |
1037 | * Try to delete the namespace if we deleted all of its | |
9d032f42 DW |
1038 | * allocation, this is not the seed or 0th device for the |
1039 | * region, and it is not actively claimed by a btt, pfn, or dax | |
1040 | * instance. | |
1f19b983 | 1041 | */ |
9d032f42 | 1042 | if (val == 0 && id != 0 && nd_region->ns_seed != dev && !ndns->claim) |
1f19b983 DW |
1043 | nd_device_unregister(dev, ND_ASYNC); |
1044 | ||
bf9bccc1 DW |
1045 | return rc; |
1046 | } | |
1047 | ||
1048 | static ssize_t size_store(struct device *dev, | |
1049 | struct device_attribute *attr, const char *buf, size_t len) | |
1050 | { | |
f524bf27 | 1051 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
1052 | unsigned long long val; |
1053 | u8 **uuid = NULL; | |
1054 | int rc; | |
1055 | ||
1056 | rc = kstrtoull(buf, 0, &val); | |
1057 | if (rc) | |
1058 | return rc; | |
1059 | ||
87a30e1f | 1060 | nd_device_lock(dev); |
bf9bccc1 DW |
1061 | nvdimm_bus_lock(dev); |
1062 | wait_nvdimm_bus_probe_idle(dev); | |
1063 | rc = __size_store(dev, val); | |
f524bf27 DW |
1064 | if (rc >= 0) |
1065 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
1066 | |
1067 | if (is_namespace_pmem(dev)) { | |
1068 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1069 | ||
1070 | uuid = &nspm->uuid; | |
1071 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1072 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1073 | ||
1074 | uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1075 | } |
1076 | ||
1077 | if (rc == 0 && val == 0 && uuid) { | |
1078 | /* setting size zero == 'delete namespace' */ | |
1079 | kfree(*uuid); | |
1080 | *uuid = NULL; | |
1081 | } | |
1082 | ||
426824d6 | 1083 | dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc); |
bf9bccc1 DW |
1084 | |
1085 | nvdimm_bus_unlock(dev); | |
87a30e1f | 1086 | nd_device_unlock(dev); |
bf9bccc1 | 1087 | |
f524bf27 | 1088 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1089 | } |
1090 | ||
8c2f7e86 | 1091 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc1 | 1092 | { |
8c2f7e86 | 1093 | struct device *dev = &ndns->dev; |
1b40e09a | 1094 | |
bf9bccc1 DW |
1095 | if (is_namespace_pmem(dev)) { |
1096 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1097 | ||
8c2f7e86 | 1098 | return resource_size(&nspm->nsio.res); |
bf9bccc1 | 1099 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 | 1100 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc1 DW |
1101 | } else if (is_namespace_io(dev)) { |
1102 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1103 | ||
8c2f7e86 DW |
1104 | return resource_size(&nsio->res); |
1105 | } else | |
1106 | WARN_ONCE(1, "unknown namespace type\n"); | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) | |
1111 | { | |
1112 | resource_size_t size; | |
1b40e09a | 1113 | |
8c2f7e86 DW |
1114 | nvdimm_bus_lock(&ndns->dev); |
1115 | size = __nvdimm_namespace_capacity(ndns); | |
1116 | nvdimm_bus_unlock(&ndns->dev); | |
1117 | ||
1118 | return size; | |
1119 | } | |
1120 | EXPORT_SYMBOL(nvdimm_namespace_capacity); | |
1121 | ||
08e6b3c6 DW |
1122 | bool nvdimm_namespace_locked(struct nd_namespace_common *ndns) |
1123 | { | |
1124 | int i; | |
1125 | bool locked = false; | |
1126 | struct device *dev = &ndns->dev; | |
1127 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1128 | ||
1129 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1130 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1131 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
1132 | ||
1133 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) { | |
1134 | dev_dbg(dev, "%s locked\n", nvdimm_name(nvdimm)); | |
1135 | locked = true; | |
1136 | } | |
1137 | } | |
1138 | return locked; | |
1139 | } | |
1140 | EXPORT_SYMBOL(nvdimm_namespace_locked); | |
1141 | ||
8c2f7e86 DW |
1142 | static ssize_t size_show(struct device *dev, |
1143 | struct device_attribute *attr, char *buf) | |
1144 | { | |
1145 | return sprintf(buf, "%llu\n", (unsigned long long) | |
1146 | nvdimm_namespace_capacity(to_ndns(dev))); | |
bf9bccc1 | 1147 | } |
b44fe760 | 1148 | static DEVICE_ATTR(size, 0444, size_show, size_store); |
bf9bccc1 | 1149 | |
f95b4bca | 1150 | static u8 *namespace_to_uuid(struct device *dev) |
bf9bccc1 | 1151 | { |
bf9bccc1 DW |
1152 | if (is_namespace_pmem(dev)) { |
1153 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1154 | ||
f95b4bca | 1155 | return nspm->uuid; |
bf9bccc1 | 1156 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
1157 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1158 | ||
f95b4bca | 1159 | return nsblk->uuid; |
bf9bccc1 | 1160 | } else |
f95b4bca DW |
1161 | return ERR_PTR(-ENXIO); |
1162 | } | |
1163 | ||
1164 | static ssize_t uuid_show(struct device *dev, | |
1165 | struct device_attribute *attr, char *buf) | |
1166 | { | |
1167 | u8 *uuid = namespace_to_uuid(dev); | |
bf9bccc1 | 1168 | |
f95b4bca DW |
1169 | if (IS_ERR(uuid)) |
1170 | return PTR_ERR(uuid); | |
bf9bccc1 DW |
1171 | if (uuid) |
1172 | return sprintf(buf, "%pUb\n", uuid); | |
1173 | return sprintf(buf, "\n"); | |
1174 | } | |
1175 | ||
1176 | /** | |
1177 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" | |
1178 | * @nd_region: parent region so we can updates all dimms in the set | |
1179 | * @dev: namespace type for generating label_id | |
1180 | * @new_uuid: incoming uuid | |
1181 | * @old_uuid: reference to the uuid storage location in the namespace object | |
1182 | */ | |
1183 | static int namespace_update_uuid(struct nd_region *nd_region, | |
1184 | struct device *dev, u8 *new_uuid, u8 **old_uuid) | |
1185 | { | |
1186 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; | |
1187 | struct nd_label_id old_label_id; | |
1188 | struct nd_label_id new_label_id; | |
f524bf27 | 1189 | int i; |
bf9bccc1 | 1190 | |
f524bf27 DW |
1191 | if (!nd_is_uuid_unique(dev, new_uuid)) |
1192 | return -EINVAL; | |
bf9bccc1 DW |
1193 | |
1194 | if (*old_uuid == NULL) | |
1195 | goto out; | |
1196 | ||
f524bf27 DW |
1197 | /* |
1198 | * If we've already written a label with this uuid, then it's | |
1199 | * too late to rename because we can't reliably update the uuid | |
1200 | * without losing the old namespace. Userspace must delete this | |
1201 | * namespace to abandon the old uuid. | |
1202 | */ | |
1203 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1204 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1205 | ||
1206 | /* | |
1207 | * This check by itself is sufficient because old_uuid | |
1208 | * would be NULL above if this uuid did not exist in the | |
1209 | * currently written set. | |
1210 | * | |
1211 | * FIXME: can we delete uuid with zero dpa allocated? | |
1212 | */ | |
ae8219f1 | 1213 | if (list_empty(&nd_mapping->labels)) |
f524bf27 DW |
1214 | return -EBUSY; |
1215 | } | |
1216 | ||
bf9bccc1 DW |
1217 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
1218 | nd_label_gen_id(&new_label_id, new_uuid, flags); | |
1219 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1220 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1221 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
c4703ce1 | 1222 | struct nd_label_ent *label_ent; |
bf9bccc1 DW |
1223 | struct resource *res; |
1224 | ||
1225 | for_each_dpa_resource(ndd, res) | |
1226 | if (strcmp(res->name, old_label_id.id) == 0) | |
1227 | sprintf((void *) res->name, "%s", | |
1228 | new_label_id.id); | |
c4703ce1 DW |
1229 | |
1230 | mutex_lock(&nd_mapping->lock); | |
1231 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { | |
1232 | struct nd_namespace_label *nd_label = label_ent->label; | |
1233 | struct nd_label_id label_id; | |
1234 | ||
1235 | if (!nd_label) | |
1236 | continue; | |
1237 | nd_label_gen_id(&label_id, nd_label->uuid, | |
b4366a82 | 1238 | nsl_get_flags(ndd, nd_label)); |
c4703ce1 DW |
1239 | if (strcmp(old_label_id.id, label_id.id) == 0) |
1240 | set_bit(ND_LABEL_REAP, &label_ent->flags); | |
1241 | } | |
1242 | mutex_unlock(&nd_mapping->lock); | |
bf9bccc1 DW |
1243 | } |
1244 | kfree(*old_uuid); | |
1245 | out: | |
1246 | *old_uuid = new_uuid; | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static ssize_t uuid_store(struct device *dev, | |
1251 | struct device_attribute *attr, const char *buf, size_t len) | |
1252 | { | |
1253 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1254 | u8 *uuid = NULL; | |
8c2f7e86 | 1255 | ssize_t rc = 0; |
bf9bccc1 | 1256 | u8 **ns_uuid; |
bf9bccc1 DW |
1257 | |
1258 | if (is_namespace_pmem(dev)) { | |
1259 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1260 | ||
1261 | ns_uuid = &nspm->uuid; | |
1262 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1263 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1264 | ||
1265 | ns_uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1266 | } else |
1267 | return -ENXIO; | |
1268 | ||
87a30e1f | 1269 | nd_device_lock(dev); |
bf9bccc1 DW |
1270 | nvdimm_bus_lock(dev); |
1271 | wait_nvdimm_bus_probe_idle(dev); | |
8c2f7e86 DW |
1272 | if (to_ndns(dev)->claim) |
1273 | rc = -EBUSY; | |
1274 | if (rc >= 0) | |
1275 | rc = nd_uuid_store(dev, &uuid, buf, len); | |
bf9bccc1 DW |
1276 | if (rc >= 0) |
1277 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); | |
f524bf27 DW |
1278 | if (rc >= 0) |
1279 | rc = nd_namespace_label_update(nd_region, dev); | |
1280 | else | |
1281 | kfree(uuid); | |
426824d6 DW |
1282 | dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf, |
1283 | buf[len - 1] == '\n' ? "" : "\n"); | |
bf9bccc1 | 1284 | nvdimm_bus_unlock(dev); |
87a30e1f | 1285 | nd_device_unlock(dev); |
bf9bccc1 | 1286 | |
f524bf27 | 1287 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1288 | } |
1289 | static DEVICE_ATTR_RW(uuid); | |
1290 | ||
1291 | static ssize_t resource_show(struct device *dev, | |
1292 | struct device_attribute *attr, char *buf) | |
1293 | { | |
1294 | struct resource *res; | |
1295 | ||
1296 | if (is_namespace_pmem(dev)) { | |
1297 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1298 | ||
1299 | res = &nspm->nsio.res; | |
1300 | } else if (is_namespace_io(dev)) { | |
1301 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1302 | ||
1303 | res = &nsio->res; | |
1304 | } else | |
1305 | return -ENXIO; | |
1306 | ||
1307 | /* no address to convey if the namespace has no allocation */ | |
1308 | if (resource_size(res) == 0) | |
1309 | return -ENXIO; | |
1310 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); | |
1311 | } | |
5cf81ce1 | 1312 | static DEVICE_ATTR_ADMIN_RO(resource); |
bf9bccc1 | 1313 | |
f979b13c | 1314 | static const unsigned long blk_lbasize_supported[] = { 512, 520, 528, |
fcae6957 | 1315 | 4096, 4104, 4160, 4224, 0 }; |
1b40e09a | 1316 | |
f979b13c DW |
1317 | static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; |
1318 | ||
1b40e09a DW |
1319 | static ssize_t sector_size_show(struct device *dev, |
1320 | struct device_attribute *attr, char *buf) | |
1321 | { | |
f979b13c DW |
1322 | if (is_namespace_blk(dev)) { |
1323 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1b40e09a | 1324 | |
b2c48f9f | 1325 | return nd_size_select_show(nsblk->lbasize, |
f979b13c DW |
1326 | blk_lbasize_supported, buf); |
1327 | } | |
1b40e09a | 1328 | |
f979b13c DW |
1329 | if (is_namespace_pmem(dev)) { |
1330 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1331 | ||
b2c48f9f | 1332 | return nd_size_select_show(nspm->lbasize, |
f979b13c DW |
1333 | pmem_lbasize_supported, buf); |
1334 | } | |
1335 | return -ENXIO; | |
1b40e09a DW |
1336 | } |
1337 | ||
1338 | static ssize_t sector_size_store(struct device *dev, | |
1339 | struct device_attribute *attr, const char *buf, size_t len) | |
1340 | { | |
f524bf27 | 1341 | struct nd_region *nd_region = to_nd_region(dev->parent); |
f979b13c DW |
1342 | const unsigned long *supported; |
1343 | unsigned long *lbasize; | |
8c2f7e86 | 1344 | ssize_t rc = 0; |
1b40e09a | 1345 | |
f979b13c DW |
1346 | if (is_namespace_blk(dev)) { |
1347 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1348 | ||
1349 | lbasize = &nsblk->lbasize; | |
1350 | supported = blk_lbasize_supported; | |
1351 | } else if (is_namespace_pmem(dev)) { | |
1352 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1353 | ||
1354 | lbasize = &nspm->lbasize; | |
1355 | supported = pmem_lbasize_supported; | |
1356 | } else | |
1b40e09a DW |
1357 | return -ENXIO; |
1358 | ||
87a30e1f | 1359 | nd_device_lock(dev); |
1b40e09a | 1360 | nvdimm_bus_lock(dev); |
8c2f7e86 DW |
1361 | if (to_ndns(dev)->claim) |
1362 | rc = -EBUSY; | |
1363 | if (rc >= 0) | |
b2c48f9f | 1364 | rc = nd_size_select_store(dev, buf, lbasize, supported); |
f524bf27 DW |
1365 | if (rc >= 0) |
1366 | rc = nd_namespace_label_update(nd_region, dev); | |
426824d6 DW |
1367 | dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote", |
1368 | buf, buf[len - 1] == '\n' ? "" : "\n"); | |
1b40e09a | 1369 | nvdimm_bus_unlock(dev); |
87a30e1f | 1370 | nd_device_unlock(dev); |
1b40e09a DW |
1371 | |
1372 | return rc ? rc : len; | |
1373 | } | |
1374 | static DEVICE_ATTR_RW(sector_size); | |
1375 | ||
0ba1c634 DW |
1376 | static ssize_t dpa_extents_show(struct device *dev, |
1377 | struct device_attribute *attr, char *buf) | |
1378 | { | |
1379 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1380 | struct nd_label_id label_id; | |
1381 | int count = 0, i; | |
1382 | u8 *uuid = NULL; | |
1383 | u32 flags = 0; | |
1384 | ||
1385 | nvdimm_bus_lock(dev); | |
1386 | if (is_namespace_pmem(dev)) { | |
1387 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1388 | ||
1389 | uuid = nspm->uuid; | |
1390 | flags = 0; | |
1391 | } else if (is_namespace_blk(dev)) { | |
1392 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1393 | ||
1394 | uuid = nsblk->uuid; | |
1395 | flags = NSLABEL_FLAG_LOCAL; | |
1396 | } | |
1397 | ||
1398 | if (!uuid) | |
1399 | goto out; | |
1400 | ||
1401 | nd_label_gen_id(&label_id, uuid, flags); | |
1402 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1403 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1404 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1405 | struct resource *res; | |
1406 | ||
1407 | for_each_dpa_resource(ndd, res) | |
1408 | if (strcmp(res->name, label_id.id) == 0) | |
1409 | count++; | |
1410 | } | |
1411 | out: | |
1412 | nvdimm_bus_unlock(dev); | |
1413 | ||
1414 | return sprintf(buf, "%d\n", count); | |
1415 | } | |
1416 | static DEVICE_ATTR_RO(dpa_extents); | |
1417 | ||
14e49454 VV |
1418 | static int btt_claim_class(struct device *dev) |
1419 | { | |
1420 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1421 | int i, loop_bitmask = 0; | |
1422 | ||
1423 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1424 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1425 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1426 | struct nd_namespace_index *nsindex; | |
1427 | ||
33a56086 DW |
1428 | /* |
1429 | * If any of the DIMMs do not support labels the only | |
1430 | * possible BTT format is v1. | |
1431 | */ | |
1432 | if (!ndd) { | |
1433 | loop_bitmask = 0; | |
1434 | break; | |
1435 | } | |
1436 | ||
14e49454 VV |
1437 | nsindex = to_namespace_index(ndd, ndd->ns_current); |
1438 | if (nsindex == NULL) | |
1439 | loop_bitmask |= 1; | |
1440 | else { | |
1441 | /* check whether existing labels are v1.1 or v1.2 */ | |
1442 | if (__le16_to_cpu(nsindex->major) == 1 | |
1443 | && __le16_to_cpu(nsindex->minor) == 1) | |
1444 | loop_bitmask |= 2; | |
1445 | else | |
1446 | loop_bitmask |= 4; | |
1447 | } | |
1448 | } | |
1449 | /* | |
1450 | * If nsindex is null loop_bitmask's bit 0 will be set, and if an index | |
1451 | * block is found, a v1.1 label for any mapping will set bit 1, and a | |
1452 | * v1.2 label will set bit 2. | |
1453 | * | |
1454 | * At the end of the loop, at most one of the three bits must be set. | |
1455 | * If multiple bits were set, it means the different mappings disagree | |
1456 | * about their labels, and this must be cleaned up first. | |
1457 | * | |
1458 | * If all the label index blocks are found to agree, nsindex of NULL | |
1459 | * implies labels haven't been initialized yet, and when they will, | |
1460 | * they will be of the 1.2 format, so we can assume BTT2.0 | |
1461 | * | |
1462 | * If 1.1 labels are found, we enforce BTT1.1, and if 1.2 labels are | |
1463 | * found, we enforce BTT2.0 | |
1464 | * | |
1465 | * If the loop was never entered, default to BTT1.1 (legacy namespaces) | |
1466 | */ | |
1467 | switch (loop_bitmask) { | |
1468 | case 0: | |
1469 | case 2: | |
1470 | return NVDIMM_CCLASS_BTT; | |
1471 | case 1: | |
1472 | case 4: | |
1473 | return NVDIMM_CCLASS_BTT2; | |
1474 | default: | |
1475 | return -ENXIO; | |
1476 | } | |
1477 | } | |
1478 | ||
8c2f7e86 DW |
1479 | static ssize_t holder_show(struct device *dev, |
1480 | struct device_attribute *attr, char *buf) | |
1481 | { | |
1482 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1483 | ssize_t rc; | |
1484 | ||
87a30e1f | 1485 | nd_device_lock(dev); |
8c2f7e86 | 1486 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); |
87a30e1f | 1487 | nd_device_unlock(dev); |
8c2f7e86 DW |
1488 | |
1489 | return rc; | |
1490 | } | |
1491 | static DEVICE_ATTR_RO(holder); | |
1492 | ||
ab84b77a | 1493 | static int __holder_class_store(struct device *dev, const char *buf) |
b3fde74e DW |
1494 | { |
1495 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1496 | ||
1497 | if (dev->driver || ndns->claim) | |
1498 | return -EBUSY; | |
1499 | ||
ab84b77a IW |
1500 | if (sysfs_streq(buf, "btt")) { |
1501 | int rc = btt_claim_class(dev); | |
1502 | ||
1503 | if (rc < NVDIMM_CCLASS_NONE) | |
1504 | return rc; | |
1505 | ndns->claim_class = rc; | |
1506 | } else if (sysfs_streq(buf, "pfn")) | |
b3fde74e | 1507 | ndns->claim_class = NVDIMM_CCLASS_PFN; |
075c3fdd | 1508 | else if (sysfs_streq(buf, "dax")) |
b3fde74e | 1509 | ndns->claim_class = NVDIMM_CCLASS_DAX; |
075c3fdd | 1510 | else if (sysfs_streq(buf, "")) |
b3fde74e DW |
1511 | ndns->claim_class = NVDIMM_CCLASS_NONE; |
1512 | else | |
1513 | return -EINVAL; | |
1514 | ||
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static ssize_t holder_class_store(struct device *dev, | |
1519 | struct device_attribute *attr, const char *buf, size_t len) | |
1520 | { | |
1521 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
ab84b77a | 1522 | int rc; |
b3fde74e | 1523 | |
87a30e1f | 1524 | nd_device_lock(dev); |
b3fde74e DW |
1525 | nvdimm_bus_lock(dev); |
1526 | wait_nvdimm_bus_probe_idle(dev); | |
1527 | rc = __holder_class_store(dev, buf); | |
1528 | if (rc >= 0) | |
1529 | rc = nd_namespace_label_update(nd_region, dev); | |
ab84b77a | 1530 | dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc); |
b3fde74e | 1531 | nvdimm_bus_unlock(dev); |
87a30e1f | 1532 | nd_device_unlock(dev); |
b3fde74e DW |
1533 | |
1534 | return rc < 0 ? rc : len; | |
1535 | } | |
1536 | ||
1537 | static ssize_t holder_class_show(struct device *dev, | |
1538 | struct device_attribute *attr, char *buf) | |
1539 | { | |
1540 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1541 | ssize_t rc; | |
1542 | ||
87a30e1f | 1543 | nd_device_lock(dev); |
b3fde74e DW |
1544 | if (ndns->claim_class == NVDIMM_CCLASS_NONE) |
1545 | rc = sprintf(buf, "\n"); | |
14e49454 VV |
1546 | else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) || |
1547 | (ndns->claim_class == NVDIMM_CCLASS_BTT2)) | |
b3fde74e DW |
1548 | rc = sprintf(buf, "btt\n"); |
1549 | else if (ndns->claim_class == NVDIMM_CCLASS_PFN) | |
1550 | rc = sprintf(buf, "pfn\n"); | |
1551 | else if (ndns->claim_class == NVDIMM_CCLASS_DAX) | |
1552 | rc = sprintf(buf, "dax\n"); | |
1553 | else | |
1554 | rc = sprintf(buf, "<unknown>\n"); | |
87a30e1f | 1555 | nd_device_unlock(dev); |
b3fde74e DW |
1556 | |
1557 | return rc; | |
1558 | } | |
1559 | static DEVICE_ATTR_RW(holder_class); | |
1560 | ||
0731de0d DW |
1561 | static ssize_t mode_show(struct device *dev, |
1562 | struct device_attribute *attr, char *buf) | |
1563 | { | |
1564 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1565 | struct device *claim; | |
1566 | char *mode; | |
1567 | ssize_t rc; | |
1568 | ||
87a30e1f | 1569 | nd_device_lock(dev); |
0731de0d | 1570 | claim = ndns->claim; |
9c412428 | 1571 | if (claim && is_nd_btt(claim)) |
0731de0d | 1572 | mode = "safe"; |
9c412428 DW |
1573 | else if (claim && is_nd_pfn(claim)) |
1574 | mode = "memory"; | |
cd03412a DW |
1575 | else if (claim && is_nd_dax(claim)) |
1576 | mode = "dax"; | |
9c412428 DW |
1577 | else if (!claim && pmem_should_map_pages(dev)) |
1578 | mode = "memory"; | |
0731de0d DW |
1579 | else |
1580 | mode = "raw"; | |
1581 | rc = sprintf(buf, "%s\n", mode); | |
87a30e1f | 1582 | nd_device_unlock(dev); |
0731de0d DW |
1583 | |
1584 | return rc; | |
1585 | } | |
1586 | static DEVICE_ATTR_RO(mode); | |
1587 | ||
8c2f7e86 DW |
1588 | static ssize_t force_raw_store(struct device *dev, |
1589 | struct device_attribute *attr, const char *buf, size_t len) | |
1590 | { | |
1591 | bool force_raw; | |
1592 | int rc = strtobool(buf, &force_raw); | |
1593 | ||
1594 | if (rc) | |
1595 | return rc; | |
1596 | ||
1597 | to_ndns(dev)->force_raw = force_raw; | |
1598 | return len; | |
1599 | } | |
1600 | ||
1601 | static ssize_t force_raw_show(struct device *dev, | |
1602 | struct device_attribute *attr, char *buf) | |
1603 | { | |
1604 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); | |
1605 | } | |
1606 | static DEVICE_ATTR_RW(force_raw); | |
1607 | ||
3d88002e DW |
1608 | static struct attribute *nd_namespace_attributes[] = { |
1609 | &dev_attr_nstype.attr, | |
bf9bccc1 | 1610 | &dev_attr_size.attr, |
0731de0d | 1611 | &dev_attr_mode.attr, |
bf9bccc1 | 1612 | &dev_attr_uuid.attr, |
8c2f7e86 | 1613 | &dev_attr_holder.attr, |
bf9bccc1 DW |
1614 | &dev_attr_resource.attr, |
1615 | &dev_attr_alt_name.attr, | |
8c2f7e86 | 1616 | &dev_attr_force_raw.attr, |
1b40e09a | 1617 | &dev_attr_sector_size.attr, |
0ba1c634 | 1618 | &dev_attr_dpa_extents.attr, |
b3fde74e | 1619 | &dev_attr_holder_class.attr, |
3d88002e DW |
1620 | NULL, |
1621 | }; | |
1622 | ||
bf9bccc1 DW |
1623 | static umode_t namespace_visible(struct kobject *kobj, |
1624 | struct attribute *a, int n) | |
1625 | { | |
1626 | struct device *dev = container_of(kobj, struct device, kobj); | |
1627 | ||
bfd2e914 DW |
1628 | if (a == &dev_attr_resource.attr && is_namespace_blk(dev)) |
1629 | return 0; | |
bf9bccc1 DW |
1630 | |
1631 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { | |
1632 | if (a == &dev_attr_size.attr) | |
b44fe760 | 1633 | return 0644; |
1b40e09a | 1634 | |
bf9bccc1 DW |
1635 | return a->mode; |
1636 | } | |
1637 | ||
13f445d6 DW |
1638 | /* base is_namespace_io() attributes */ |
1639 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr || | |
1640 | a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr || | |
1641 | a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr || | |
1642 | a == &dev_attr_resource.attr) | |
bf9bccc1 DW |
1643 | return a->mode; |
1644 | ||
1645 | return 0; | |
1646 | } | |
1647 | ||
3d88002e DW |
1648 | static struct attribute_group nd_namespace_attribute_group = { |
1649 | .attrs = nd_namespace_attributes, | |
bf9bccc1 | 1650 | .is_visible = namespace_visible, |
3d88002e DW |
1651 | }; |
1652 | ||
1653 | static const struct attribute_group *nd_namespace_attribute_groups[] = { | |
1654 | &nd_device_attribute_group, | |
1655 | &nd_namespace_attribute_group, | |
74ae66c3 | 1656 | &nd_numa_attribute_group, |
3d88002e DW |
1657 | NULL, |
1658 | }; | |
1659 | ||
78c81cc8 DW |
1660 | static const struct device_type namespace_io_device_type = { |
1661 | .name = "nd_namespace_io", | |
1662 | .release = namespace_io_release, | |
1663 | .groups = nd_namespace_attribute_groups, | |
1664 | }; | |
1665 | ||
1666 | static const struct device_type namespace_pmem_device_type = { | |
1667 | .name = "nd_namespace_pmem", | |
1668 | .release = namespace_pmem_release, | |
1669 | .groups = nd_namespace_attribute_groups, | |
1670 | }; | |
1671 | ||
1672 | static const struct device_type namespace_blk_device_type = { | |
1673 | .name = "nd_namespace_blk", | |
1674 | .release = namespace_blk_release, | |
1675 | .groups = nd_namespace_attribute_groups, | |
1676 | }; | |
1677 | ||
1678 | static bool is_namespace_pmem(const struct device *dev) | |
1679 | { | |
1680 | return dev ? dev->type == &namespace_pmem_device_type : false; | |
1681 | } | |
1682 | ||
1683 | static bool is_namespace_blk(const struct device *dev) | |
1684 | { | |
1685 | return dev ? dev->type == &namespace_blk_device_type : false; | |
1686 | } | |
1687 | ||
1688 | static bool is_namespace_io(const struct device *dev) | |
1689 | { | |
1690 | return dev ? dev->type == &namespace_io_device_type : false; | |
1691 | } | |
1692 | ||
8c2f7e86 DW |
1693 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
1694 | { | |
1695 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; | |
e1455744 | 1696 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
cd03412a | 1697 | struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
0bfb8dd3 | 1698 | struct nd_namespace_common *ndns = NULL; |
8c2f7e86 DW |
1699 | resource_size_t size; |
1700 | ||
cd03412a | 1701 | if (nd_btt || nd_pfn || nd_dax) { |
0bfb8dd3 | 1702 | if (nd_btt) |
e1455744 | 1703 | ndns = nd_btt->ndns; |
0bfb8dd3 | 1704 | else if (nd_pfn) |
e1455744 | 1705 | ndns = nd_pfn->ndns; |
cd03412a DW |
1706 | else if (nd_dax) |
1707 | ndns = nd_dax->nd_pfn.ndns; | |
e1455744 | 1708 | |
0bfb8dd3 | 1709 | if (!ndns) |
8c2f7e86 DW |
1710 | return ERR_PTR(-ENODEV); |
1711 | ||
1712 | /* | |
1713 | * Flush any in-progess probes / removals in the driver | |
1714 | * for the raw personality of this namespace. | |
1715 | */ | |
87a30e1f DW |
1716 | nd_device_lock(&ndns->dev); |
1717 | nd_device_unlock(&ndns->dev); | |
8c2f7e86 DW |
1718 | if (ndns->dev.driver) { |
1719 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", | |
0bfb8dd3 | 1720 | dev_name(dev)); |
8c2f7e86 DW |
1721 | return ERR_PTR(-EBUSY); |
1722 | } | |
0bfb8dd3 | 1723 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
8c2f7e86 | 1724 | "host (%s) vs claim (%s) mismatch\n", |
0bfb8dd3 | 1725 | dev_name(dev), |
8c2f7e86 DW |
1726 | dev_name(ndns->claim))) |
1727 | return ERR_PTR(-ENXIO); | |
1728 | } else { | |
1729 | ndns = to_ndns(dev); | |
1730 | if (ndns->claim) { | |
1731 | dev_dbg(dev, "claimed by %s, failing probe\n", | |
1732 | dev_name(ndns->claim)); | |
1733 | ||
1734 | return ERR_PTR(-ENXIO); | |
1735 | } | |
1736 | } | |
1737 | ||
08e6b3c6 DW |
1738 | if (nvdimm_namespace_locked(ndns)) |
1739 | return ERR_PTR(-EACCES); | |
1740 | ||
8c2f7e86 DW |
1741 | size = nvdimm_namespace_capacity(ndns); |
1742 | if (size < ND_MIN_NAMESPACE_SIZE) { | |
1743 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", | |
1744 | &size, ND_MIN_NAMESPACE_SIZE); | |
1745 | return ERR_PTR(-ENODEV); | |
1746 | } | |
1747 | ||
6acd7d5e DW |
1748 | /* |
1749 | * Note, alignment validation for fsdax and devdax mode | |
1750 | * namespaces happens in nd_pfn_validate() where infoblock | |
1751 | * padding parameters can be applied. | |
1752 | */ | |
1753 | if (pmem_should_map_pages(dev)) { | |
1754 | struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev); | |
1755 | struct resource *res = &nsio->res; | |
1756 | ||
1757 | if (!IS_ALIGNED(res->start | (res->end + 1), | |
1758 | memremap_compat_align())) { | |
1759 | dev_err(&ndns->dev, "%pr misaligned, unable to map\n", res); | |
1760 | return ERR_PTR(-EOPNOTSUPP); | |
1761 | } | |
1762 | } | |
1763 | ||
8c2f7e86 DW |
1764 | if (is_namespace_pmem(&ndns->dev)) { |
1765 | struct nd_namespace_pmem *nspm; | |
1766 | ||
1767 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
bd26d0d0 | 1768 | if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
8c2f7e86 | 1769 | return ERR_PTR(-ENODEV); |
8c2f7e86 | 1770 | } else if (is_namespace_blk(&ndns->dev)) { |
047fc8a1 RZ |
1771 | struct nd_namespace_blk *nsblk; |
1772 | ||
1773 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
bd26d0d0 DK |
1774 | if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__)) |
1775 | return ERR_PTR(-ENODEV); | |
1776 | if (!nsblk->lbasize) { | |
426824d6 | 1777 | dev_dbg(&ndns->dev, "sector size not set\n"); |
bd26d0d0 DK |
1778 | return ERR_PTR(-ENODEV); |
1779 | } | |
047fc8a1 RZ |
1780 | if (!nd_namespace_blk_validate(nsblk)) |
1781 | return ERR_PTR(-ENODEV); | |
8c2f7e86 DW |
1782 | } |
1783 | ||
1784 | return ndns; | |
1785 | } | |
1786 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); | |
1787 | ||
8f4b01fc AK |
1788 | int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns, |
1789 | resource_size_t size) | |
1790 | { | |
1791 | if (is_namespace_blk(&ndns->dev)) | |
1792 | return 0; | |
1793 | return devm_nsio_enable(dev, to_nd_namespace_io(&ndns->dev), size); | |
1794 | } | |
1795 | EXPORT_SYMBOL_GPL(devm_namespace_enable); | |
1796 | ||
1797 | void devm_namespace_disable(struct device *dev, struct nd_namespace_common *ndns) | |
1798 | { | |
1799 | if (is_namespace_blk(&ndns->dev)) | |
1800 | return; | |
1801 | devm_nsio_disable(dev, to_nd_namespace_io(&ndns->dev)); | |
1802 | } | |
1803 | EXPORT_SYMBOL_GPL(devm_namespace_disable); | |
1804 | ||
3d88002e DW |
1805 | static struct device **create_namespace_io(struct nd_region *nd_region) |
1806 | { | |
1807 | struct nd_namespace_io *nsio; | |
1808 | struct device *dev, **devs; | |
1809 | struct resource *res; | |
1810 | ||
1811 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); | |
1812 | if (!nsio) | |
1813 | return NULL; | |
1814 | ||
1815 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1816 | if (!devs) { | |
1817 | kfree(nsio); | |
1818 | return NULL; | |
1819 | } | |
1820 | ||
8c2f7e86 | 1821 | dev = &nsio->common.dev; |
3d88002e DW |
1822 | dev->type = &namespace_io_device_type; |
1823 | dev->parent = &nd_region->dev; | |
1824 | res = &nsio->res; | |
1825 | res->name = dev_name(&nd_region->dev); | |
1826 | res->flags = IORESOURCE_MEM; | |
1827 | res->start = nd_region->ndr_start; | |
1828 | res->end = res->start + nd_region->ndr_size - 1; | |
1829 | ||
1830 | devs[0] = dev; | |
1831 | return devs; | |
1832 | } | |
1833 | ||
bf9bccc1 DW |
1834 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
1835 | u64 cookie, u16 pos) | |
1836 | { | |
1837 | struct nd_namespace_label *found = NULL; | |
1838 | int i; | |
1839 | ||
1840 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1841 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
faec6f8a DW |
1842 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
1843 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
ae8219f1 | 1844 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1845 | bool found_uuid = false; |
bf9bccc1 | 1846 | |
ae8219f1 DW |
1847 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1848 | struct nd_namespace_label *nd_label = label_ent->label; | |
1849 | u16 position, nlabel; | |
ae8219f1 DW |
1850 | |
1851 | if (!nd_label) | |
1852 | continue; | |
b4366a82 DW |
1853 | position = nsl_get_position(ndd, nd_label); |
1854 | nlabel = nsl_get_nlabel(ndd, nd_label); | |
bf9bccc1 | 1855 | |
9761b02d | 1856 | if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) |
bf9bccc1 DW |
1857 | continue; |
1858 | ||
1859 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1860 | continue; | |
1861 | ||
8b03aa0e DW |
1862 | if (!nsl_validate_type_guid(ndd, nd_label, |
1863 | &nd_set->type_guid)) | |
faec6f8a | 1864 | continue; |
faec6f8a | 1865 | |
bf9bccc1 | 1866 | if (found_uuid) { |
426824d6 | 1867 | dev_dbg(ndd->dev, "duplicate entry for uuid\n"); |
bf9bccc1 DW |
1868 | return false; |
1869 | } | |
1870 | found_uuid = true; | |
1871 | if (nlabel != nd_region->ndr_mappings) | |
1872 | continue; | |
1873 | if (position != pos) | |
1874 | continue; | |
1875 | found = nd_label; | |
1876 | break; | |
1877 | } | |
1878 | if (found) | |
1879 | break; | |
1880 | } | |
1881 | return found != NULL; | |
1882 | } | |
1883 | ||
1884 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) | |
1885 | { | |
bf9bccc1 DW |
1886 | int i; |
1887 | ||
1888 | if (!pmem_id) | |
1889 | return -ENODEV; | |
1890 | ||
1891 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1892 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
0e3b0d12 | 1893 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
ae8219f1 | 1894 | struct nd_namespace_label *nd_label = NULL; |
bf9bccc1 | 1895 | u64 hw_start, hw_end, pmem_start, pmem_end; |
ae8219f1 | 1896 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1897 | |
9cf8bd52 | 1898 | lockdep_assert_held(&nd_mapping->lock); |
ae8219f1 DW |
1899 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1900 | nd_label = label_ent->label; | |
1901 | if (!nd_label) | |
1902 | continue; | |
bf9bccc1 DW |
1903 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
1904 | break; | |
ae8219f1 DW |
1905 | nd_label = NULL; |
1906 | } | |
bf9bccc1 DW |
1907 | |
1908 | if (!nd_label) { | |
1909 | WARN_ON(1); | |
1910 | return -EINVAL; | |
1911 | } | |
1912 | ||
bf9bccc1 DW |
1913 | /* |
1914 | * Check that this label is compliant with the dpa | |
1915 | * range published in NFIT | |
1916 | */ | |
1917 | hw_start = nd_mapping->start; | |
1918 | hw_end = hw_start + nd_mapping->size; | |
b4366a82 DW |
1919 | pmem_start = nsl_get_dpa(ndd, nd_label); |
1920 | pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label); | |
0e3b0d12 DW |
1921 | if (pmem_start >= hw_start && pmem_start < hw_end |
1922 | && pmem_end <= hw_end && pmem_end > hw_start) | |
bf9bccc1 | 1923 | /* pass */; |
0e3b0d12 DW |
1924 | else { |
1925 | dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n", | |
1926 | dev_name(ndd->dev), nd_label->uuid); | |
bf9bccc1 | 1927 | return -EINVAL; |
0e3b0d12 | 1928 | } |
bf9bccc1 | 1929 | |
8a5f50d3 DW |
1930 | /* move recently validated label to the front of the list */ |
1931 | list_move(&label_ent->list, &nd_mapping->labels); | |
bf9bccc1 DW |
1932 | } |
1933 | return 0; | |
1934 | } | |
1935 | ||
1936 | /** | |
8a5f50d3 | 1937 | * create_namespace_pmem - validate interleave set labelling, retrieve label0 |
bf9bccc1 | 1938 | * @nd_region: region with mappings to validate |
8a5f50d3 DW |
1939 | * @nspm: target namespace to create |
1940 | * @nd_label: target pmem namespace label to evaluate | |
bf9bccc1 | 1941 | */ |
65853a1d | 1942 | static struct device *create_namespace_pmem(struct nd_region *nd_region, |
b4366a82 DW |
1943 | struct nd_mapping *nd_mapping, |
1944 | struct nd_namespace_label *nd_label) | |
bf9bccc1 | 1945 | { |
b4366a82 DW |
1946 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1947 | struct nd_namespace_index *nsindex = | |
1948 | to_namespace_index(ndd, ndd->ns_current); | |
c12c48ce | 1949 | u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
86ef58a4 | 1950 | u64 altcookie = nd_region_interleave_set_altcookie(nd_region); |
ae8219f1 | 1951 | struct nd_label_ent *label_ent; |
8a5f50d3 | 1952 | struct nd_namespace_pmem *nspm; |
bf9bccc1 | 1953 | resource_size_t size = 0; |
8a5f50d3 DW |
1954 | struct resource *res; |
1955 | struct device *dev; | |
ae8219f1 | 1956 | int rc = 0; |
bf9bccc1 DW |
1957 | u16 i; |
1958 | ||
4765218d DW |
1959 | if (cookie == 0) { |
1960 | dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); | |
8a5f50d3 | 1961 | return ERR_PTR(-ENXIO); |
4765218d | 1962 | } |
bf9bccc1 | 1963 | |
9761b02d | 1964 | if (!nsl_validate_isetcookie(ndd, nd_label, cookie)) { |
8a5f50d3 DW |
1965 | dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", |
1966 | nd_label->uuid); | |
9761b02d | 1967 | if (!nsl_validate_isetcookie(ndd, nd_label, altcookie)) |
86ef58a4 DW |
1968 | return ERR_PTR(-EAGAIN); |
1969 | ||
1970 | dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n", | |
1971 | nd_label->uuid); | |
ae8219f1 | 1972 | } |
bf9bccc1 | 1973 | |
8a5f50d3 DW |
1974 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
1975 | if (!nspm) | |
1976 | return ERR_PTR(-ENOMEM); | |
ae8219f1 | 1977 | |
0e3b0d12 | 1978 | nspm->id = -1; |
8a5f50d3 DW |
1979 | dev = &nspm->nsio.common.dev; |
1980 | dev->type = &namespace_pmem_device_type; | |
1981 | dev->parent = &nd_region->dev; | |
1982 | res = &nspm->nsio.res; | |
1983 | res->name = dev_name(&nd_region->dev); | |
1984 | res->flags = IORESOURCE_MEM; | |
ae8219f1 | 1985 | |
86ef58a4 DW |
1986 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
1987 | if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) | |
1988 | continue; | |
1989 | if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i)) | |
1990 | continue; | |
1991 | break; | |
1992 | } | |
1993 | ||
8a5f50d3 | 1994 | if (i < nd_region->ndr_mappings) { |
4f867220 | 1995 | struct nvdimm *nvdimm = nd_region->mapping[i].nvdimm; |
0e3b0d12 | 1996 | |
8a5f50d3 DW |
1997 | /* |
1998 | * Give up if we don't find an instance of a uuid at each | |
1999 | * position (from 0 to nd_region->ndr_mappings - 1), or if we | |
2000 | * find a dimm with two instances of the same uuid. | |
2001 | */ | |
0e3b0d12 | 2002 | dev_err(&nd_region->dev, "%s missing label for %pUb\n", |
4f867220 | 2003 | nvdimm_name(nvdimm), nd_label->uuid); |
8a5f50d3 | 2004 | rc = -EINVAL; |
ae8219f1 | 2005 | goto err; |
8a5f50d3 | 2006 | } |
bf9bccc1 DW |
2007 | |
2008 | /* | |
2009 | * Fix up each mapping's 'labels' to have the validated pmem label for | |
2010 | * that position at labels[0], and NULL at labels[1]. In the process, | |
2011 | * check that the namespace aligns with interleave-set. We know | |
2012 | * that it does not overlap with any blk namespaces by virtue of | |
2013 | * the dimm being enabled (i.e. nd_label_reserve_dpa() | |
2014 | * succeeded). | |
2015 | */ | |
8a5f50d3 | 2016 | rc = select_pmem_id(nd_region, nd_label->uuid); |
bf9bccc1 DW |
2017 | if (rc) |
2018 | goto err; | |
2019 | ||
2020 | /* Calculate total size and populate namespace properties from label0 */ | |
2021 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
ae8219f1 | 2022 | struct nd_namespace_label *label0; |
b3fde74e | 2023 | struct nvdimm_drvdata *ndd; |
ae8219f1 DW |
2024 | |
2025 | nd_mapping = &nd_region->mapping[i]; | |
ae8219f1 DW |
2026 | label_ent = list_first_entry_or_null(&nd_mapping->labels, |
2027 | typeof(*label_ent), list); | |
86aa6668 | 2028 | label0 = label_ent ? label_ent->label : NULL; |
ae8219f1 DW |
2029 | |
2030 | if (!label0) { | |
2031 | WARN_ON(1); | |
2032 | continue; | |
2033 | } | |
bf9bccc1 | 2034 | |
b4366a82 DW |
2035 | ndd = to_ndd(nd_mapping); |
2036 | size += nsl_get_rawsize(ndd, label0); | |
2037 | if (nsl_get_position(ndd, label0) != 0) | |
bf9bccc1 DW |
2038 | continue; |
2039 | WARN_ON(nspm->alt_name || nspm->uuid); | |
b4366a82 DW |
2040 | nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0), |
2041 | NSLABEL_NAME_LEN, GFP_KERNEL); | |
bf9bccc1 DW |
2042 | nspm->uuid = kmemdup((void __force *) label0->uuid, |
2043 | NSLABEL_UUID_LEN, GFP_KERNEL); | |
b4366a82 | 2044 | nspm->lbasize = nsl_get_lbasize(ndd, label0); |
a6e6d722 DW |
2045 | nspm->nsio.common.claim_class = |
2046 | nsl_get_claim_class(ndd, label0); | |
bf9bccc1 DW |
2047 | } |
2048 | ||
2049 | if (!nspm->alt_name || !nspm->uuid) { | |
2050 | rc = -ENOMEM; | |
2051 | goto err; | |
2052 | } | |
2053 | ||
0e3b0d12 | 2054 | nd_namespace_pmem_set_resource(nd_region, nspm, size); |
bf9bccc1 | 2055 | |
8a5f50d3 | 2056 | return dev; |
bf9bccc1 | 2057 | err: |
8a5f50d3 | 2058 | namespace_pmem_release(dev); |
bf9bccc1 DW |
2059 | switch (rc) { |
2060 | case -EINVAL: | |
426824d6 | 2061 | dev_dbg(&nd_region->dev, "invalid label(s)\n"); |
bf9bccc1 DW |
2062 | break; |
2063 | case -ENODEV: | |
426824d6 | 2064 | dev_dbg(&nd_region->dev, "label not found\n"); |
bf9bccc1 DW |
2065 | break; |
2066 | default: | |
426824d6 | 2067 | dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc); |
bf9bccc1 DW |
2068 | break; |
2069 | } | |
8a5f50d3 | 2070 | return ERR_PTR(rc); |
bf9bccc1 DW |
2071 | } |
2072 | ||
1b40e09a DW |
2073 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
2074 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, | |
2075 | resource_size_t start) | |
2076 | { | |
2077 | struct nd_label_id label_id; | |
2078 | struct resource *res; | |
2079 | ||
2080 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
2081 | res = krealloc(nsblk->res, | |
2082 | sizeof(void *) * (nsblk->num_resources + 1), | |
2083 | GFP_KERNEL); | |
2084 | if (!res) | |
2085 | return NULL; | |
2086 | nsblk->res = (struct resource **) res; | |
2087 | for_each_dpa_resource(ndd, res) | |
2088 | if (strcmp(res->name, label_id.id) == 0 | |
2089 | && res->start == start) { | |
2090 | nsblk->res[nsblk->num_resources++] = res; | |
2091 | return res; | |
2092 | } | |
2093 | return NULL; | |
2094 | } | |
2095 | ||
2096 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) | |
2097 | { | |
2098 | struct nd_namespace_blk *nsblk; | |
2099 | struct device *dev; | |
2100 | ||
2101 | if (!is_nd_blk(&nd_region->dev)) | |
2102 | return NULL; | |
2103 | ||
2104 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2105 | if (!nsblk) | |
2106 | return NULL; | |
2107 | ||
8c2f7e86 | 2108 | dev = &nsblk->common.dev; |
1b40e09a DW |
2109 | dev->type = &namespace_blk_device_type; |
2110 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
2111 | if (nsblk->id < 0) { | |
2112 | kfree(nsblk); | |
2113 | return NULL; | |
2114 | } | |
2115 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); | |
2116 | dev->parent = &nd_region->dev; | |
1b40e09a | 2117 | |
8c2f7e86 | 2118 | return &nsblk->common.dev; |
1b40e09a DW |
2119 | } |
2120 | ||
98a29c39 DW |
2121 | static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) |
2122 | { | |
2123 | struct nd_namespace_pmem *nspm; | |
2124 | struct resource *res; | |
2125 | struct device *dev; | |
2126 | ||
c9e582aa | 2127 | if (!is_memory(&nd_region->dev)) |
98a29c39 DW |
2128 | return NULL; |
2129 | ||
2130 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2131 | if (!nspm) | |
2132 | return NULL; | |
2133 | ||
2134 | dev = &nspm->nsio.common.dev; | |
2135 | dev->type = &namespace_pmem_device_type; | |
2136 | dev->parent = &nd_region->dev; | |
2137 | res = &nspm->nsio.res; | |
2138 | res->name = dev_name(&nd_region->dev); | |
2139 | res->flags = IORESOURCE_MEM; | |
2140 | ||
2141 | nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
2142 | if (nspm->id < 0) { | |
2143 | kfree(nspm); | |
2144 | return NULL; | |
2145 | } | |
2146 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id); | |
98a29c39 DW |
2147 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
2148 | ||
2149 | return dev; | |
2150 | } | |
2151 | ||
2152 | void nd_region_create_ns_seed(struct nd_region *nd_region) | |
1b40e09a DW |
2153 | { |
2154 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
98a29c39 DW |
2155 | |
2156 | if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) | |
2157 | return; | |
2158 | ||
2159 | if (is_nd_blk(&nd_region->dev)) | |
2160 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); | |
2161 | else | |
2162 | nd_region->ns_seed = nd_namespace_pmem_create(nd_region); | |
2163 | ||
1b40e09a DW |
2164 | /* |
2165 | * Seed creation failures are not fatal, provisioning is simply | |
2166 | * disabled until memory becomes available | |
2167 | */ | |
2168 | if (!nd_region->ns_seed) | |
98a29c39 DW |
2169 | dev_err(&nd_region->dev, "failed to create %s namespace\n", |
2170 | is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); | |
1b40e09a DW |
2171 | else |
2172 | nd_device_register(nd_region->ns_seed); | |
2173 | } | |
2174 | ||
cd03412a DW |
2175 | void nd_region_create_dax_seed(struct nd_region *nd_region) |
2176 | { | |
2177 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2178 | nd_region->dax_seed = nd_dax_create(nd_region); | |
2179 | /* | |
2180 | * Seed creation failures are not fatal, provisioning is simply | |
2181 | * disabled until memory becomes available | |
2182 | */ | |
2183 | if (!nd_region->dax_seed) | |
2184 | dev_err(&nd_region->dev, "failed to create dax namespace\n"); | |
2185 | } | |
2186 | ||
2dc43331 DW |
2187 | void nd_region_create_pfn_seed(struct nd_region *nd_region) |
2188 | { | |
2189 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2190 | nd_region->pfn_seed = nd_pfn_create(nd_region); | |
2191 | /* | |
2192 | * Seed creation failures are not fatal, provisioning is simply | |
2193 | * disabled until memory becomes available | |
2194 | */ | |
2195 | if (!nd_region->pfn_seed) | |
2196 | dev_err(&nd_region->dev, "failed to create pfn namespace\n"); | |
2197 | } | |
2198 | ||
8c2f7e86 DW |
2199 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
2200 | { | |
2201 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
2202 | nd_region->btt_seed = nd_btt_create(nd_region); | |
2203 | /* | |
2204 | * Seed creation failures are not fatal, provisioning is simply | |
2205 | * disabled until memory becomes available | |
2206 | */ | |
2207 | if (!nd_region->btt_seed) | |
2208 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); | |
2209 | } | |
2210 | ||
8a5f50d3 DW |
2211 | static int add_namespace_resource(struct nd_region *nd_region, |
2212 | struct nd_namespace_label *nd_label, struct device **devs, | |
2213 | int count) | |
1b40e09a | 2214 | { |
8a5f50d3 DW |
2215 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
2216 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2217 | int i; | |
2218 | ||
2219 | for (i = 0; i < count; i++) { | |
2220 | u8 *uuid = namespace_to_uuid(devs[i]); | |
2221 | struct resource *res; | |
2222 | ||
2223 | if (IS_ERR_OR_NULL(uuid)) { | |
2224 | WARN_ON(1); | |
2225 | continue; | |
2226 | } | |
2227 | ||
2228 | if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0) | |
2229 | continue; | |
2230 | if (is_namespace_blk(devs[i])) { | |
2231 | res = nsblk_add_resource(nd_region, ndd, | |
2232 | to_nd_namespace_blk(devs[i]), | |
b4366a82 | 2233 | nsl_get_dpa(ndd, nd_label)); |
8a5f50d3 DW |
2234 | if (!res) |
2235 | return -ENXIO; | |
2236 | nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count); | |
2237 | } else { | |
2238 | dev_err(&nd_region->dev, | |
2239 | "error: conflicting extents for uuid: %pUb\n", | |
2240 | nd_label->uuid); | |
2241 | return -ENXIO; | |
2242 | } | |
2243 | break; | |
2244 | } | |
2245 | ||
2246 | return i; | |
2247 | } | |
2248 | ||
65853a1d | 2249 | static struct device *create_namespace_blk(struct nd_region *nd_region, |
8a5f50d3 DW |
2250 | struct nd_namespace_label *nd_label, int count) |
2251 | { | |
2252 | ||
2253 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
faec6f8a | 2254 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
ae8219f1 | 2255 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1b40e09a | 2256 | struct nd_namespace_blk *nsblk; |
238b323a | 2257 | char name[NSLABEL_NAME_LEN]; |
8a5f50d3 DW |
2258 | struct device *dev = NULL; |
2259 | struct resource *res; | |
2260 | ||
8b03aa0e DW |
2261 | if (!nsl_validate_type_guid(ndd, nd_label, &nd_set->type_guid)) |
2262 | return ERR_PTR(-EAGAIN); | |
f56541a7 DW |
2263 | if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2)) |
2264 | return ERR_PTR(-EAGAIN); | |
faec6f8a | 2265 | |
8a5f50d3 DW |
2266 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |
2267 | if (!nsblk) | |
2268 | return ERR_PTR(-ENOMEM); | |
2269 | dev = &nsblk->common.dev; | |
2270 | dev->type = &namespace_blk_device_type; | |
2271 | dev->parent = &nd_region->dev; | |
2272 | nsblk->id = -1; | |
b4366a82 | 2273 | nsblk->lbasize = nsl_get_lbasize(ndd, nd_label); |
a6e6d722 DW |
2274 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, GFP_KERNEL); |
2275 | nsblk->common.claim_class = nsl_get_claim_class(ndd, nd_label); | |
8a5f50d3 DW |
2276 | if (!nsblk->uuid) |
2277 | goto blk_err; | |
b4366a82 | 2278 | nsl_get_name(ndd, nd_label, name); |
55c1fc0a | 2279 | if (name[0]) { |
b4366a82 | 2280 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL); |
55c1fc0a KL |
2281 | if (!nsblk->alt_name) |
2282 | goto blk_err; | |
2283 | } | |
8a5f50d3 | 2284 | res = nsblk_add_resource(nd_region, ndd, nsblk, |
b4366a82 | 2285 | nsl_get_dpa(ndd, nd_label)); |
8a5f50d3 DW |
2286 | if (!res) |
2287 | goto blk_err; | |
2288 | nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count); | |
2289 | return dev; | |
2290 | blk_err: | |
2291 | namespace_blk_release(dev); | |
2292 | return ERR_PTR(-ENXIO); | |
2293 | } | |
2294 | ||
6ff3e912 DW |
2295 | static int cmp_dpa(const void *a, const void *b) |
2296 | { | |
2297 | const struct device *dev_a = *(const struct device **) a; | |
2298 | const struct device *dev_b = *(const struct device **) b; | |
2299 | struct nd_namespace_blk *nsblk_a, *nsblk_b; | |
2300 | struct nd_namespace_pmem *nspm_a, *nspm_b; | |
2301 | ||
2302 | if (is_namespace_io(dev_a)) | |
2303 | return 0; | |
2304 | ||
2305 | if (is_namespace_blk(dev_a)) { | |
2306 | nsblk_a = to_nd_namespace_blk(dev_a); | |
2307 | nsblk_b = to_nd_namespace_blk(dev_b); | |
2308 | ||
2309 | return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start, | |
2310 | sizeof(resource_size_t)); | |
2311 | } | |
2312 | ||
2313 | nspm_a = to_nd_namespace_pmem(dev_a); | |
2314 | nspm_b = to_nd_namespace_pmem(dev_b); | |
2315 | ||
2316 | return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start, | |
2317 | sizeof(resource_size_t)); | |
2318 | } | |
2319 | ||
8a5f50d3 DW |
2320 | static struct device **scan_labels(struct nd_region *nd_region) |
2321 | { | |
c969e24c | 2322 | int i, count = 0; |
8a5f50d3 DW |
2323 | struct device *dev, **devs = NULL; |
2324 | struct nd_label_ent *label_ent, *e; | |
c969e24c | 2325 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
b4366a82 | 2326 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
c969e24c | 2327 | resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; |
1b40e09a | 2328 | |
8a5f50d3 DW |
2329 | /* "safe" because create_namespace_pmem() might list_move() label_ent */ |
2330 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
ae8219f1 | 2331 | struct nd_namespace_label *nd_label = label_ent->label; |
1b40e09a | 2332 | struct device **__devs; |
ae8219f1 | 2333 | u32 flags; |
1b40e09a | 2334 | |
ae8219f1 DW |
2335 | if (!nd_label) |
2336 | continue; | |
b4366a82 | 2337 | flags = nsl_get_flags(ndd, nd_label); |
8a5f50d3 DW |
2338 | if (is_nd_blk(&nd_region->dev) |
2339 | == !!(flags & NSLABEL_FLAG_LOCAL)) | |
2340 | /* pass, region matches label type */; | |
1b40e09a DW |
2341 | else |
2342 | continue; | |
2343 | ||
c969e24c | 2344 | /* skip labels that describe extents outside of the region */ |
b4366a82 DW |
2345 | if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start || |
2346 | nsl_get_dpa(ndd, nd_label) > map_end) | |
2347 | continue; | |
c969e24c | 2348 | |
8a5f50d3 DW |
2349 | i = add_namespace_resource(nd_region, nd_label, devs, count); |
2350 | if (i < 0) | |
2351 | goto err; | |
1b40e09a DW |
2352 | if (i < count) |
2353 | continue; | |
2354 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); | |
2355 | if (!__devs) | |
2356 | goto err; | |
2357 | memcpy(__devs, devs, sizeof(dev) * count); | |
2358 | kfree(devs); | |
2359 | devs = __devs; | |
2360 | ||
faec6f8a | 2361 | if (is_nd_blk(&nd_region->dev)) |
8a5f50d3 | 2362 | dev = create_namespace_blk(nd_region, nd_label, count); |
b4366a82 DW |
2363 | else |
2364 | dev = create_namespace_pmem(nd_region, nd_mapping, | |
2365 | nd_label); | |
faec6f8a DW |
2366 | |
2367 | if (IS_ERR(dev)) { | |
2368 | switch (PTR_ERR(dev)) { | |
2369 | case -EAGAIN: | |
2370 | /* skip invalid labels */ | |
2371 | continue; | |
2372 | case -ENODEV: | |
2373 | /* fallthrough to seed creation */ | |
2374 | break; | |
2375 | default: | |
2376 | goto err; | |
2377 | } | |
2378 | } else | |
2379 | devs[count++] = dev; | |
2380 | ||
1b40e09a DW |
2381 | } |
2382 | ||
426824d6 DW |
2383 | dev_dbg(&nd_region->dev, "discovered %d %s namespace%s\n", |
2384 | count, is_nd_blk(&nd_region->dev) | |
8a5f50d3 | 2385 | ? "blk" : "pmem", count == 1 ? "" : "s"); |
1b40e09a DW |
2386 | |
2387 | if (count == 0) { | |
2388 | /* Publish a zero-sized namespace for userspace to configure. */ | |
ae8219f1 | 2389 | nd_mapping_free_labels(nd_mapping); |
1b40e09a DW |
2390 | |
2391 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); | |
2392 | if (!devs) | |
2393 | goto err; | |
8a5f50d3 DW |
2394 | if (is_nd_blk(&nd_region->dev)) { |
2395 | struct nd_namespace_blk *nsblk; | |
2396 | ||
2397 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2398 | if (!nsblk) | |
2399 | goto err; | |
2400 | dev = &nsblk->common.dev; | |
2401 | dev->type = &namespace_blk_device_type; | |
2402 | } else { | |
2403 | struct nd_namespace_pmem *nspm; | |
2404 | ||
2405 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2406 | if (!nspm) | |
2407 | goto err; | |
2408 | dev = &nspm->nsio.common.dev; | |
2409 | dev->type = &namespace_pmem_device_type; | |
0e3b0d12 | 2410 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
8a5f50d3 | 2411 | } |
1b40e09a DW |
2412 | dev->parent = &nd_region->dev; |
2413 | devs[count++] = dev; | |
c9e582aa | 2414 | } else if (is_memory(&nd_region->dev)) { |
8a5f50d3 DW |
2415 | /* clean unselected labels */ |
2416 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
0e3b0d12 DW |
2417 | struct list_head *l, *e; |
2418 | LIST_HEAD(list); | |
2419 | int j; | |
2420 | ||
8a5f50d3 DW |
2421 | nd_mapping = &nd_region->mapping[i]; |
2422 | if (list_empty(&nd_mapping->labels)) { | |
2423 | WARN_ON(1); | |
2424 | continue; | |
2425 | } | |
0e3b0d12 DW |
2426 | |
2427 | j = count; | |
2428 | list_for_each_safe(l, e, &nd_mapping->labels) { | |
2429 | if (!j--) | |
2430 | break; | |
2431 | list_move_tail(l, &list); | |
2432 | } | |
8a5f50d3 | 2433 | nd_mapping_free_labels(nd_mapping); |
0e3b0d12 | 2434 | list_splice_init(&list, &nd_mapping->labels); |
8a5f50d3 | 2435 | } |
1b40e09a DW |
2436 | } |
2437 | ||
6ff3e912 DW |
2438 | if (count > 1) |
2439 | sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); | |
2440 | ||
1b40e09a DW |
2441 | return devs; |
2442 | ||
ae8219f1 | 2443 | err: |
75d29713 DC |
2444 | if (devs) { |
2445 | for (i = 0; devs[i]; i++) | |
2446 | if (is_nd_blk(&nd_region->dev)) | |
2447 | namespace_blk_release(devs[i]); | |
2448 | else | |
2449 | namespace_pmem_release(devs[i]); | |
2450 | kfree(devs); | |
2451 | } | |
1b40e09a DW |
2452 | return NULL; |
2453 | } | |
2454 | ||
8a5f50d3 | 2455 | static struct device **create_namespaces(struct nd_region *nd_region) |
ae8219f1 | 2456 | { |
59858d3d | 2457 | struct nd_mapping *nd_mapping; |
ae8219f1 | 2458 | struct device **devs; |
8a5f50d3 | 2459 | int i; |
ae8219f1 DW |
2460 | |
2461 | if (nd_region->ndr_mappings == 0) | |
2462 | return NULL; | |
2463 | ||
8a5f50d3 DW |
2464 | /* lock down all mappings while we scan labels */ |
2465 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2466 | nd_mapping = &nd_region->mapping[i]; | |
2467 | mutex_lock_nested(&nd_mapping->lock, i); | |
2468 | } | |
2469 | ||
2470 | devs = scan_labels(nd_region); | |
2471 | ||
2472 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2473 | int reverse = nd_region->ndr_mappings - 1 - i; | |
2474 | ||
2475 | nd_mapping = &nd_region->mapping[reverse]; | |
2476 | mutex_unlock(&nd_mapping->lock); | |
2477 | } | |
ae8219f1 DW |
2478 | |
2479 | return devs; | |
2480 | } | |
2481 | ||
a2d1c7a6 DW |
2482 | static void deactivate_labels(void *region) |
2483 | { | |
2484 | struct nd_region *nd_region = region; | |
2485 | int i; | |
2486 | ||
2487 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2488 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
2489 | struct nvdimm_drvdata *ndd = nd_mapping->ndd; | |
2490 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
2491 | ||
2492 | mutex_lock(&nd_mapping->lock); | |
2493 | nd_mapping_free_labels(nd_mapping); | |
2494 | mutex_unlock(&nd_mapping->lock); | |
2495 | ||
2496 | put_ndd(ndd); | |
2497 | nd_mapping->ndd = NULL; | |
2498 | if (ndd) | |
2499 | atomic_dec(&nvdimm->busy); | |
2500 | } | |
2501 | } | |
2502 | ||
bf9bccc1 DW |
2503 | static int init_active_labels(struct nd_region *nd_region) |
2504 | { | |
2505 | int i; | |
2506 | ||
2507 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2508 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
2509 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2510 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
ae8219f1 | 2511 | struct nd_label_ent *label_ent; |
bf9bccc1 DW |
2512 | int count, j; |
2513 | ||
2514 | /* | |
9d62ed96 DW |
2515 | * If the dimm is disabled then we may need to prevent |
2516 | * the region from being activated. | |
bf9bccc1 DW |
2517 | */ |
2518 | if (!ndd) { | |
9d62ed96 DW |
2519 | if (test_bit(NDD_LOCKED, &nvdimm->flags)) |
2520 | /* fail, label data may be unreadable */; | |
a0e37452 | 2521 | else if (test_bit(NDD_LABELING, &nvdimm->flags)) |
9d62ed96 DW |
2522 | /* fail, labels needed to disambiguate dpa */; |
2523 | else | |
bf9bccc1 | 2524 | return 0; |
9d62ed96 DW |
2525 | |
2526 | dev_err(&nd_region->dev, "%s: is %s, failing probe\n", | |
2527 | dev_name(&nd_mapping->nvdimm->dev), | |
2528 | test_bit(NDD_LOCKED, &nvdimm->flags) | |
2529 | ? "locked" : "disabled"); | |
bf9bccc1 DW |
2530 | return -ENXIO; |
2531 | } | |
2532 | nd_mapping->ndd = ndd; | |
2533 | atomic_inc(&nvdimm->busy); | |
2534 | get_ndd(ndd); | |
2535 | ||
2536 | count = nd_label_active_count(ndd); | |
426824d6 | 2537 | dev_dbg(ndd->dev, "count: %d\n", count); |
bf9bccc1 DW |
2538 | if (!count) |
2539 | continue; | |
bf9bccc1 DW |
2540 | for (j = 0; j < count; j++) { |
2541 | struct nd_namespace_label *label; | |
2542 | ||
ae8219f1 DW |
2543 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); |
2544 | if (!label_ent) | |
2545 | break; | |
bf9bccc1 | 2546 | label = nd_label_active(ndd, j); |
d5d30d5a | 2547 | if (test_bit(NDD_NOBLK, &nvdimm->flags)) { |
b4366a82 | 2548 | u32 flags = nsl_get_flags(ndd, label); |
d5d30d5a DW |
2549 | |
2550 | flags &= ~NSLABEL_FLAG_LOCAL; | |
8176f147 | 2551 | nsl_set_flags(ndd, label, flags); |
d5d30d5a | 2552 | } |
ae8219f1 DW |
2553 | label_ent->label = label; |
2554 | ||
2555 | mutex_lock(&nd_mapping->lock); | |
2556 | list_add_tail(&label_ent->list, &nd_mapping->labels); | |
2557 | mutex_unlock(&nd_mapping->lock); | |
bf9bccc1 | 2558 | } |
ae8219f1 | 2559 | |
a2d1c7a6 DW |
2560 | if (j < count) |
2561 | break; | |
2562 | } | |
ae8219f1 | 2563 | |
a2d1c7a6 DW |
2564 | if (i < nd_region->ndr_mappings) { |
2565 | deactivate_labels(nd_region); | |
ae8219f1 | 2566 | return -ENOMEM; |
bf9bccc1 DW |
2567 | } |
2568 | ||
a2d1c7a6 DW |
2569 | return devm_add_action_or_reset(&nd_region->dev, deactivate_labels, |
2570 | nd_region); | |
bf9bccc1 DW |
2571 | } |
2572 | ||
3d88002e DW |
2573 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
2574 | { | |
2575 | struct device **devs = NULL; | |
bf9bccc1 | 2576 | int i, rc = 0, type; |
3d88002e DW |
2577 | |
2578 | *err = 0; | |
bf9bccc1 DW |
2579 | nvdimm_bus_lock(&nd_region->dev); |
2580 | rc = init_active_labels(nd_region); | |
2581 | if (rc) { | |
2582 | nvdimm_bus_unlock(&nd_region->dev); | |
2583 | return rc; | |
2584 | } | |
2585 | ||
2586 | type = nd_region_to_nstype(nd_region); | |
2587 | switch (type) { | |
3d88002e DW |
2588 | case ND_DEVICE_NAMESPACE_IO: |
2589 | devs = create_namespace_io(nd_region); | |
2590 | break; | |
bf9bccc1 | 2591 | case ND_DEVICE_NAMESPACE_PMEM: |
1b40e09a | 2592 | case ND_DEVICE_NAMESPACE_BLK: |
8a5f50d3 | 2593 | devs = create_namespaces(nd_region); |
1b40e09a | 2594 | break; |
3d88002e DW |
2595 | default: |
2596 | break; | |
2597 | } | |
bf9bccc1 | 2598 | nvdimm_bus_unlock(&nd_region->dev); |
3d88002e DW |
2599 | |
2600 | if (!devs) | |
2601 | return -ENODEV; | |
2602 | ||
2603 | for (i = 0; devs[i]; i++) { | |
2604 | struct device *dev = devs[i]; | |
1b40e09a | 2605 | int id; |
3d88002e | 2606 | |
1b40e09a DW |
2607 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
2608 | struct nd_namespace_blk *nsblk; | |
2609 | ||
2610 | nsblk = to_nd_namespace_blk(dev); | |
2611 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2612 | GFP_KERNEL); | |
2613 | nsblk->id = id; | |
0e3b0d12 DW |
2614 | } else if (type == ND_DEVICE_NAMESPACE_PMEM) { |
2615 | struct nd_namespace_pmem *nspm; | |
2616 | ||
2617 | nspm = to_nd_namespace_pmem(dev); | |
2618 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2619 | GFP_KERNEL); | |
2620 | nspm->id = id; | |
1b40e09a DW |
2621 | } else |
2622 | id = i; | |
2623 | ||
2624 | if (id < 0) | |
2625 | break; | |
2626 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); | |
3d88002e DW |
2627 | nd_device_register(dev); |
2628 | } | |
1b40e09a DW |
2629 | if (i) |
2630 | nd_region->ns_seed = devs[0]; | |
2631 | ||
2632 | if (devs[i]) { | |
2633 | int j; | |
2634 | ||
2635 | for (j = i; devs[j]; j++) { | |
2636 | struct device *dev = devs[j]; | |
2637 | ||
2638 | device_initialize(dev); | |
2639 | put_device(dev); | |
2640 | } | |
2641 | *err = j - i; | |
2642 | /* | |
2643 | * All of the namespaces we tried to register failed, so | |
2644 | * fail region activation. | |
2645 | */ | |
2646 | if (*err == 0) | |
2647 | rc = -ENODEV; | |
2648 | } | |
3d88002e DW |
2649 | kfree(devs); |
2650 | ||
1b40e09a DW |
2651 | if (rc == -ENODEV) |
2652 | return rc; | |
2653 | ||
3d88002e DW |
2654 | return i; |
2655 | } |