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3d88002e DW |
1 | /* |
2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | */ | |
13 | #include <linux/module.h> | |
14 | #include <linux/device.h> | |
6ff3e912 | 15 | #include <linux/sort.h> |
3d88002e | 16 | #include <linux/slab.h> |
004f1afb | 17 | #include <linux/pmem.h> |
ae8219f1 | 18 | #include <linux/list.h> |
3d88002e | 19 | #include <linux/nd.h> |
bf9bccc1 | 20 | #include "nd-core.h" |
3d88002e DW |
21 | #include "nd.h" |
22 | ||
23 | static void namespace_io_release(struct device *dev) | |
24 | { | |
25 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
26 | ||
27 | kfree(nsio); | |
28 | } | |
29 | ||
bf9bccc1 DW |
30 | static void namespace_pmem_release(struct device *dev) |
31 | { | |
32 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0e3b0d12 | 33 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 | 34 | |
0e3b0d12 DW |
35 | if (nspm->id >= 0) |
36 | ida_simple_remove(&nd_region->ns_ida, nspm->id); | |
bf9bccc1 DW |
37 | kfree(nspm->alt_name); |
38 | kfree(nspm->uuid); | |
39 | kfree(nspm); | |
40 | } | |
41 | ||
42 | static void namespace_blk_release(struct device *dev) | |
43 | { | |
1b40e09a DW |
44 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
45 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
46 | ||
47 | if (nsblk->id >= 0) | |
48 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); | |
49 | kfree(nsblk->alt_name); | |
50 | kfree(nsblk->uuid); | |
51 | kfree(nsblk->res); | |
52 | kfree(nsblk); | |
bf9bccc1 DW |
53 | } |
54 | ||
3d88002e DW |
55 | static struct device_type namespace_io_device_type = { |
56 | .name = "nd_namespace_io", | |
57 | .release = namespace_io_release, | |
58 | }; | |
59 | ||
bf9bccc1 DW |
60 | static struct device_type namespace_pmem_device_type = { |
61 | .name = "nd_namespace_pmem", | |
62 | .release = namespace_pmem_release, | |
63 | }; | |
64 | ||
65 | static struct device_type namespace_blk_device_type = { | |
66 | .name = "nd_namespace_blk", | |
67 | .release = namespace_blk_release, | |
68 | }; | |
69 | ||
6ff3e912 | 70 | static bool is_namespace_pmem(const struct device *dev) |
bf9bccc1 DW |
71 | { |
72 | return dev ? dev->type == &namespace_pmem_device_type : false; | |
73 | } | |
74 | ||
6ff3e912 | 75 | static bool is_namespace_blk(const struct device *dev) |
bf9bccc1 DW |
76 | { |
77 | return dev ? dev->type == &namespace_blk_device_type : false; | |
78 | } | |
79 | ||
6ff3e912 | 80 | static bool is_namespace_io(const struct device *dev) |
bf9bccc1 DW |
81 | { |
82 | return dev ? dev->type == &namespace_io_device_type : false; | |
83 | } | |
84 | ||
e07ecd76 DW |
85 | static int is_uuid_busy(struct device *dev, void *data) |
86 | { | |
87 | u8 *uuid1 = data, *uuid2 = NULL; | |
88 | ||
89 | if (is_namespace_pmem(dev)) { | |
90 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
91 | ||
92 | uuid2 = nspm->uuid; | |
93 | } else if (is_namespace_blk(dev)) { | |
94 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
95 | ||
96 | uuid2 = nsblk->uuid; | |
97 | } else if (is_nd_btt(dev)) { | |
98 | struct nd_btt *nd_btt = to_nd_btt(dev); | |
99 | ||
100 | uuid2 = nd_btt->uuid; | |
101 | } else if (is_nd_pfn(dev)) { | |
102 | struct nd_pfn *nd_pfn = to_nd_pfn(dev); | |
103 | ||
104 | uuid2 = nd_pfn->uuid; | |
105 | } | |
106 | ||
107 | if (uuid2 && memcmp(uuid1, uuid2, NSLABEL_UUID_LEN) == 0) | |
108 | return -EBUSY; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int is_namespace_uuid_busy(struct device *dev, void *data) | |
114 | { | |
115 | if (is_nd_pmem(dev) || is_nd_blk(dev)) | |
116 | return device_for_each_child(dev, data, is_uuid_busy); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | /** | |
121 | * nd_is_uuid_unique - verify that no other namespace has @uuid | |
122 | * @dev: any device on a nvdimm_bus | |
123 | * @uuid: uuid to check | |
124 | */ | |
125 | bool nd_is_uuid_unique(struct device *dev, u8 *uuid) | |
126 | { | |
127 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); | |
128 | ||
129 | if (!nvdimm_bus) | |
130 | return false; | |
131 | WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm_bus->dev)); | |
132 | if (device_for_each_child(&nvdimm_bus->dev, uuid, | |
133 | is_namespace_uuid_busy) != 0) | |
134 | return false; | |
135 | return true; | |
136 | } | |
137 | ||
004f1afb DW |
138 | bool pmem_should_map_pages(struct device *dev) |
139 | { | |
140 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
cfe30b87 | 141 | struct nd_namespace_io *nsio; |
004f1afb DW |
142 | |
143 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) | |
144 | return false; | |
145 | ||
146 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) | |
147 | return false; | |
148 | ||
149 | if (is_nd_pfn(dev) || is_nd_btt(dev)) | |
150 | return false; | |
151 | ||
cfe30b87 DW |
152 | nsio = to_nd_namespace_io(dev); |
153 | if (region_intersects(nsio->res.start, resource_size(&nsio->res), | |
154 | IORESOURCE_SYSTEM_RAM, | |
155 | IORES_DESC_NONE) == REGION_MIXED) | |
156 | return false; | |
157 | ||
004f1afb DW |
158 | #ifdef ARCH_MEMREMAP_PMEM |
159 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; | |
160 | #else | |
161 | return false; | |
162 | #endif | |
163 | } | |
164 | EXPORT_SYMBOL(pmem_should_map_pages); | |
165 | ||
5212e11f VV |
166 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
167 | char *name) | |
168 | { | |
169 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
004f1afb | 170 | const char *suffix = NULL; |
5212e11f | 171 | |
0731de0d DW |
172 | if (ndns->claim && is_nd_btt(ndns->claim)) |
173 | suffix = "s"; | |
5212e11f | 174 | |
004f1afb | 175 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
01220733 DW |
176 | int nsidx = 0; |
177 | ||
178 | if (is_namespace_pmem(&ndns->dev)) { | |
179 | struct nd_namespace_pmem *nspm; | |
180 | ||
181 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
182 | nsidx = nspm->id; | |
183 | } | |
184 | ||
185 | if (nsidx) | |
186 | sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, | |
187 | suffix ? suffix : ""); | |
188 | else | |
189 | sprintf(name, "pmem%d%s", nd_region->id, | |
190 | suffix ? suffix : ""); | |
004f1afb | 191 | } else if (is_namespace_blk(&ndns->dev)) { |
5212e11f VV |
192 | struct nd_namespace_blk *nsblk; |
193 | ||
194 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
004f1afb DW |
195 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, |
196 | suffix ? suffix : ""); | |
5212e11f VV |
197 | } else { |
198 | return NULL; | |
199 | } | |
200 | ||
201 | return name; | |
202 | } | |
203 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); | |
204 | ||
6ec68954 VV |
205 | const u8 *nd_dev_to_uuid(struct device *dev) |
206 | { | |
207 | static const u8 null_uuid[16]; | |
208 | ||
209 | if (!dev) | |
210 | return null_uuid; | |
211 | ||
212 | if (is_namespace_pmem(dev)) { | |
213 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
214 | ||
215 | return nspm->uuid; | |
216 | } else if (is_namespace_blk(dev)) { | |
217 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
218 | ||
219 | return nsblk->uuid; | |
220 | } else | |
221 | return null_uuid; | |
222 | } | |
223 | EXPORT_SYMBOL(nd_dev_to_uuid); | |
224 | ||
3d88002e DW |
225 | static ssize_t nstype_show(struct device *dev, |
226 | struct device_attribute *attr, char *buf) | |
227 | { | |
228 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
229 | ||
230 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); | |
231 | } | |
232 | static DEVICE_ATTR_RO(nstype); | |
233 | ||
bf9bccc1 DW |
234 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
235 | const size_t len) | |
236 | { | |
237 | char *input, *pos, *alt_name, **ns_altname; | |
238 | ssize_t rc; | |
239 | ||
240 | if (is_namespace_pmem(dev)) { | |
241 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
242 | ||
243 | ns_altname = &nspm->alt_name; | |
244 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
245 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
246 | ||
247 | ns_altname = &nsblk->alt_name; | |
bf9bccc1 DW |
248 | } else |
249 | return -ENXIO; | |
250 | ||
8c2f7e86 | 251 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
252 | return -EBUSY; |
253 | ||
254 | input = kmemdup(buf, len + 1, GFP_KERNEL); | |
255 | if (!input) | |
256 | return -ENOMEM; | |
257 | ||
258 | input[len] = '\0'; | |
259 | pos = strim(input); | |
260 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { | |
261 | rc = -EINVAL; | |
262 | goto out; | |
263 | } | |
264 | ||
265 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); | |
266 | if (!alt_name) { | |
267 | rc = -ENOMEM; | |
268 | goto out; | |
269 | } | |
270 | kfree(*ns_altname); | |
271 | *ns_altname = alt_name; | |
272 | sprintf(*ns_altname, "%s", pos); | |
273 | rc = len; | |
274 | ||
275 | out: | |
276 | kfree(input); | |
277 | return rc; | |
278 | } | |
279 | ||
1b40e09a DW |
280 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
281 | { | |
8c2f7e86 | 282 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
1b40e09a DW |
283 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
284 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
285 | struct nd_label_id label_id; | |
286 | resource_size_t size = 0; | |
287 | struct resource *res; | |
288 | ||
289 | if (!nsblk->uuid) | |
290 | return 0; | |
291 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
292 | for_each_dpa_resource(ndd, res) | |
293 | if (strcmp(res->name, label_id.id) == 0) | |
294 | size += resource_size(res); | |
295 | return size; | |
296 | } | |
297 | ||
047fc8a1 RZ |
298 | static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
299 | { | |
300 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); | |
301 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
302 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
303 | struct nd_label_id label_id; | |
304 | struct resource *res; | |
305 | int count, i; | |
306 | ||
307 | if (!nsblk->uuid || !nsblk->lbasize || !ndd) | |
308 | return false; | |
309 | ||
310 | count = 0; | |
311 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
312 | for_each_dpa_resource(ndd, res) { | |
313 | if (strcmp(res->name, label_id.id) != 0) | |
314 | continue; | |
315 | /* | |
ae551e9c | 316 | * Resources with unacknowledged adjustments indicate a |
047fc8a1 RZ |
317 | * failure to update labels |
318 | */ | |
319 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
320 | return false; | |
321 | count++; | |
322 | } | |
323 | ||
324 | /* These values match after a successful label update */ | |
325 | if (count != nsblk->num_resources) | |
326 | return false; | |
327 | ||
328 | for (i = 0; i < nsblk->num_resources; i++) { | |
329 | struct resource *found = NULL; | |
330 | ||
331 | for_each_dpa_resource(ndd, res) | |
332 | if (res == nsblk->res[i]) { | |
333 | found = res; | |
334 | break; | |
335 | } | |
336 | /* stale resource */ | |
337 | if (!found) | |
338 | return false; | |
339 | } | |
340 | ||
341 | return true; | |
342 | } | |
343 | ||
344 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) | |
345 | { | |
346 | resource_size_t size; | |
347 | ||
348 | nvdimm_bus_lock(&nsblk->common.dev); | |
349 | size = __nd_namespace_blk_validate(nsblk); | |
350 | nvdimm_bus_unlock(&nsblk->common.dev); | |
351 | ||
352 | return size; | |
353 | } | |
354 | EXPORT_SYMBOL(nd_namespace_blk_validate); | |
355 | ||
356 | ||
f524bf27 DW |
357 | static int nd_namespace_label_update(struct nd_region *nd_region, |
358 | struct device *dev) | |
359 | { | |
8c2f7e86 | 360 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
f524bf27 | 361 | "namespace must be idle during label update\n"); |
8c2f7e86 | 362 | if (dev->driver || to_ndns(dev)->claim) |
f524bf27 DW |
363 | return 0; |
364 | ||
365 | /* | |
366 | * Only allow label writes that will result in a valid namespace | |
367 | * or deletion of an existing namespace. | |
368 | */ | |
369 | if (is_namespace_pmem(dev)) { | |
370 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0ba1c634 | 371 | resource_size_t size = resource_size(&nspm->nsio.res); |
f524bf27 DW |
372 | |
373 | if (size == 0 && nspm->uuid) | |
374 | /* delete allocation */; | |
375 | else if (!nspm->uuid) | |
376 | return 0; | |
377 | ||
378 | return nd_pmem_namespace_label_update(nd_region, nspm, size); | |
379 | } else if (is_namespace_blk(dev)) { | |
0ba1c634 DW |
380 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
381 | resource_size_t size = nd_namespace_blk_size(nsblk); | |
382 | ||
383 | if (size == 0 && nsblk->uuid) | |
384 | /* delete allocation */; | |
385 | else if (!nsblk->uuid || !nsblk->lbasize) | |
386 | return 0; | |
387 | ||
388 | return nd_blk_namespace_label_update(nd_region, nsblk, size); | |
f524bf27 DW |
389 | } else |
390 | return -ENXIO; | |
391 | } | |
392 | ||
bf9bccc1 DW |
393 | static ssize_t alt_name_store(struct device *dev, |
394 | struct device_attribute *attr, const char *buf, size_t len) | |
395 | { | |
f524bf27 | 396 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
397 | ssize_t rc; |
398 | ||
399 | device_lock(dev); | |
400 | nvdimm_bus_lock(dev); | |
401 | wait_nvdimm_bus_probe_idle(dev); | |
402 | rc = __alt_name_store(dev, buf, len); | |
f524bf27 DW |
403 | if (rc >= 0) |
404 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
405 | dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc); |
406 | nvdimm_bus_unlock(dev); | |
407 | device_unlock(dev); | |
408 | ||
f524bf27 | 409 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
410 | } |
411 | ||
412 | static ssize_t alt_name_show(struct device *dev, | |
413 | struct device_attribute *attr, char *buf) | |
414 | { | |
415 | char *ns_altname; | |
416 | ||
417 | if (is_namespace_pmem(dev)) { | |
418 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
419 | ||
420 | ns_altname = nspm->alt_name; | |
421 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
422 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
423 | ||
424 | ns_altname = nsblk->alt_name; | |
bf9bccc1 DW |
425 | } else |
426 | return -ENXIO; | |
427 | ||
428 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); | |
429 | } | |
430 | static DEVICE_ATTR_RW(alt_name); | |
431 | ||
432 | static int scan_free(struct nd_region *nd_region, | |
433 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
434 | resource_size_t n) | |
435 | { | |
436 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
437 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
438 | int rc = 0; | |
439 | ||
440 | while (n) { | |
441 | struct resource *res, *last; | |
442 | resource_size_t new_start; | |
443 | ||
444 | last = NULL; | |
445 | for_each_dpa_resource(ndd, res) | |
446 | if (strcmp(res->name, label_id->id) == 0) | |
447 | last = res; | |
448 | res = last; | |
449 | if (!res) | |
450 | return 0; | |
451 | ||
452 | if (n >= resource_size(res)) { | |
453 | n -= resource_size(res); | |
454 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); | |
455 | nvdimm_free_dpa(ndd, res); | |
456 | /* retry with last resource deleted */ | |
457 | continue; | |
458 | } | |
459 | ||
460 | /* | |
461 | * Keep BLK allocations relegated to high DPA as much as | |
462 | * possible | |
463 | */ | |
464 | if (is_blk) | |
465 | new_start = res->start + n; | |
466 | else | |
467 | new_start = res->start; | |
468 | ||
469 | rc = adjust_resource(res, new_start, resource_size(res) - n); | |
1b40e09a DW |
470 | if (rc == 0) |
471 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
472 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
473 | break; | |
474 | } | |
475 | ||
476 | return rc; | |
477 | } | |
478 | ||
479 | /** | |
480 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id | |
481 | * @nd_region: the set of dimms to reclaim @n bytes from | |
482 | * @label_id: unique identifier for the namespace consuming this dpa range | |
483 | * @n: number of bytes per-dimm to release | |
484 | * | |
485 | * Assumes resources are ordered. Starting from the end try to | |
486 | * adjust_resource() the allocation to @n, but if @n is larger than the | |
487 | * allocation delete it and find the 'new' last allocation in the label | |
488 | * set. | |
489 | */ | |
490 | static int shrink_dpa_allocation(struct nd_region *nd_region, | |
491 | struct nd_label_id *label_id, resource_size_t n) | |
492 | { | |
493 | int i; | |
494 | ||
495 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
496 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
497 | int rc; | |
498 | ||
499 | rc = scan_free(nd_region, nd_mapping, label_id, n); | |
500 | if (rc) | |
501 | return rc; | |
502 | } | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
507 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, | |
508 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, | |
509 | resource_size_t n) | |
510 | { | |
511 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
512 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
513 | resource_size_t first_dpa; | |
514 | struct resource *res; | |
515 | int rc = 0; | |
516 | ||
517 | /* allocate blk from highest dpa first */ | |
518 | if (is_blk) | |
519 | first_dpa = nd_mapping->start + nd_mapping->size - n; | |
520 | else | |
521 | first_dpa = nd_mapping->start; | |
522 | ||
523 | /* first resource allocation for this label-id or dimm */ | |
524 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); | |
525 | if (!res) | |
526 | rc = -EBUSY; | |
527 | ||
528 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); | |
529 | return rc ? n : 0; | |
530 | } | |
531 | ||
762d067d DW |
532 | |
533 | /** | |
534 | * space_valid() - validate free dpa space against constraints | |
535 | * @nd_region: hosting region of the free space | |
536 | * @ndd: dimm device data for debug | |
537 | * @label_id: namespace id to allocate space | |
538 | * @prev: potential allocation that precedes free space | |
539 | * @next: allocation that follows the given free space range | |
540 | * @exist: first allocation with same id in the mapping | |
541 | * @n: range that must satisfied for pmem allocations | |
542 | * @valid: free space range to validate | |
543 | * | |
544 | * BLK-space is valid as long as it does not precede a PMEM | |
545 | * allocation in a given region. PMEM-space must be contiguous | |
546 | * and adjacent to an existing existing allocation (if one | |
547 | * exists). If reserving PMEM any space is valid. | |
548 | */ | |
549 | static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, | |
550 | struct nd_label_id *label_id, struct resource *prev, | |
551 | struct resource *next, struct resource *exist, | |
552 | resource_size_t n, struct resource *valid) | |
bf9bccc1 | 553 | { |
762d067d DW |
554 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
555 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
556 | ||
557 | if (valid->start >= valid->end) | |
558 | goto invalid; | |
559 | ||
560 | if (is_reserve) | |
561 | return; | |
562 | ||
563 | if (!is_pmem) { | |
564 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
565 | struct nvdimm_bus *nvdimm_bus; | |
566 | struct blk_alloc_info info = { | |
567 | .nd_mapping = nd_mapping, | |
568 | .available = nd_mapping->size, | |
569 | .res = valid, | |
570 | }; | |
571 | ||
572 | WARN_ON(!is_nd_blk(&nd_region->dev)); | |
573 | nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); | |
574 | device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); | |
575 | return; | |
576 | } | |
577 | ||
578 | /* allocation needs to be contiguous, so this is all or nothing */ | |
579 | if (resource_size(valid) < n) | |
580 | goto invalid; | |
581 | ||
582 | /* we've got all the space we need and no existing allocation */ | |
583 | if (!exist) | |
584 | return; | |
585 | ||
586 | /* allocation needs to be contiguous with the existing namespace */ | |
587 | if (valid->start == exist->end + 1 | |
588 | || valid->end == exist->start - 1) | |
589 | return; | |
590 | ||
591 | invalid: | |
592 | /* truncate @valid size to 0 */ | |
593 | valid->end = valid->start - 1; | |
bf9bccc1 DW |
594 | } |
595 | ||
596 | enum alloc_loc { | |
597 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, | |
598 | }; | |
599 | ||
600 | static resource_size_t scan_allocate(struct nd_region *nd_region, | |
601 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
602 | resource_size_t n) | |
603 | { | |
604 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; | |
605 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
606 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
762d067d | 607 | struct resource *res, *exist = NULL, valid; |
bf9bccc1 | 608 | const resource_size_t to_allocate = n; |
bf9bccc1 DW |
609 | int first; |
610 | ||
762d067d DW |
611 | for_each_dpa_resource(ndd, res) |
612 | if (strcmp(label_id->id, res->name) == 0) | |
613 | exist = res; | |
614 | ||
615 | valid.start = nd_mapping->start; | |
616 | valid.end = mapping_end; | |
617 | valid.name = "free space"; | |
bf9bccc1 DW |
618 | retry: |
619 | first = 0; | |
620 | for_each_dpa_resource(ndd, res) { | |
bf9bccc1 | 621 | struct resource *next = res->sibling, *new_res = NULL; |
762d067d | 622 | resource_size_t allocate, available = 0; |
bf9bccc1 DW |
623 | enum alloc_loc loc = ALLOC_ERR; |
624 | const char *action; | |
625 | int rc = 0; | |
626 | ||
627 | /* ignore resources outside this nd_mapping */ | |
628 | if (res->start > mapping_end) | |
629 | continue; | |
630 | if (res->end < nd_mapping->start) | |
631 | continue; | |
632 | ||
633 | /* space at the beginning of the mapping */ | |
634 | if (!first++ && res->start > nd_mapping->start) { | |
762d067d DW |
635 | valid.start = nd_mapping->start; |
636 | valid.end = res->start - 1; | |
637 | space_valid(nd_region, ndd, label_id, NULL, next, exist, | |
638 | to_allocate, &valid); | |
639 | available = resource_size(&valid); | |
640 | if (available) | |
bf9bccc1 DW |
641 | loc = ALLOC_BEFORE; |
642 | } | |
643 | ||
644 | /* space between allocations */ | |
645 | if (!loc && next) { | |
762d067d DW |
646 | valid.start = res->start + resource_size(res); |
647 | valid.end = min(mapping_end, next->start - 1); | |
648 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
649 | to_allocate, &valid); | |
650 | available = resource_size(&valid); | |
651 | if (available) | |
bf9bccc1 | 652 | loc = ALLOC_MID; |
bf9bccc1 DW |
653 | } |
654 | ||
655 | /* space at the end of the mapping */ | |
656 | if (!loc && !next) { | |
762d067d DW |
657 | valid.start = res->start + resource_size(res); |
658 | valid.end = mapping_end; | |
659 | space_valid(nd_region, ndd, label_id, res, next, exist, | |
660 | to_allocate, &valid); | |
661 | available = resource_size(&valid); | |
662 | if (available) | |
bf9bccc1 | 663 | loc = ALLOC_AFTER; |
bf9bccc1 DW |
664 | } |
665 | ||
666 | if (!loc || !available) | |
667 | continue; | |
668 | allocate = min(available, n); | |
669 | switch (loc) { | |
670 | case ALLOC_BEFORE: | |
671 | if (strcmp(res->name, label_id->id) == 0) { | |
672 | /* adjust current resource up */ | |
bf9bccc1 DW |
673 | rc = adjust_resource(res, res->start - allocate, |
674 | resource_size(res) + allocate); | |
675 | action = "cur grow up"; | |
676 | } else | |
677 | action = "allocate"; | |
678 | break; | |
679 | case ALLOC_MID: | |
680 | if (strcmp(next->name, label_id->id) == 0) { | |
681 | /* adjust next resource up */ | |
bf9bccc1 DW |
682 | rc = adjust_resource(next, next->start |
683 | - allocate, resource_size(next) | |
684 | + allocate); | |
685 | new_res = next; | |
686 | action = "next grow up"; | |
687 | } else if (strcmp(res->name, label_id->id) == 0) { | |
688 | action = "grow down"; | |
689 | } else | |
690 | action = "allocate"; | |
691 | break; | |
692 | case ALLOC_AFTER: | |
693 | if (strcmp(res->name, label_id->id) == 0) | |
694 | action = "grow down"; | |
695 | else | |
696 | action = "allocate"; | |
697 | break; | |
698 | default: | |
699 | return n; | |
700 | } | |
701 | ||
702 | if (strcmp(action, "allocate") == 0) { | |
703 | /* BLK allocate bottom up */ | |
704 | if (!is_pmem) | |
762d067d | 705 | valid.start += available - allocate; |
bf9bccc1 DW |
706 | |
707 | new_res = nvdimm_allocate_dpa(ndd, label_id, | |
762d067d | 708 | valid.start, allocate); |
bf9bccc1 DW |
709 | if (!new_res) |
710 | rc = -EBUSY; | |
711 | } else if (strcmp(action, "grow down") == 0) { | |
712 | /* adjust current resource down */ | |
713 | rc = adjust_resource(res, res->start, resource_size(res) | |
714 | + allocate); | |
1b40e09a DW |
715 | if (rc == 0) |
716 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
717 | } |
718 | ||
719 | if (!new_res) | |
720 | new_res = res; | |
721 | ||
722 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", | |
723 | action, loc, rc); | |
724 | ||
725 | if (rc) | |
726 | return n; | |
727 | ||
728 | n -= allocate; | |
729 | if (n) { | |
730 | /* | |
731 | * Retry scan with newly inserted resources. | |
732 | * For example, if we did an ALLOC_BEFORE | |
733 | * insertion there may also have been space | |
734 | * available for an ALLOC_AFTER insertion, so we | |
735 | * need to check this same resource again | |
736 | */ | |
737 | goto retry; | |
738 | } else | |
739 | return 0; | |
740 | } | |
741 | ||
1b40e09a DW |
742 | /* |
743 | * If we allocated nothing in the BLK case it may be because we are in | |
744 | * an initial "pmem-reserve pass". Only do an initial BLK allocation | |
745 | * when none of the DPA space is reserved. | |
746 | */ | |
747 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) | |
bf9bccc1 DW |
748 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
749 | return n; | |
750 | } | |
751 | ||
1b40e09a DW |
752 | static int merge_dpa(struct nd_region *nd_region, |
753 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) | |
754 | { | |
755 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
756 | struct resource *res; | |
757 | ||
758 | if (strncmp("pmem", label_id->id, 4) == 0) | |
759 | return 0; | |
760 | retry: | |
761 | for_each_dpa_resource(ndd, res) { | |
762 | int rc; | |
763 | struct resource *next = res->sibling; | |
764 | resource_size_t end = res->start + resource_size(res); | |
765 | ||
766 | if (!next || strcmp(res->name, label_id->id) != 0 | |
767 | || strcmp(next->name, label_id->id) != 0 | |
768 | || end != next->start) | |
769 | continue; | |
770 | end += resource_size(next); | |
771 | nvdimm_free_dpa(ndd, next); | |
772 | rc = adjust_resource(res, res->start, end - res->start); | |
773 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); | |
774 | if (rc) | |
775 | return rc; | |
776 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
777 | goto retry; | |
778 | } | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | static int __reserve_free_pmem(struct device *dev, void *data) | |
784 | { | |
785 | struct nvdimm *nvdimm = data; | |
786 | struct nd_region *nd_region; | |
787 | struct nd_label_id label_id; | |
788 | int i; | |
789 | ||
790 | if (!is_nd_pmem(dev)) | |
791 | return 0; | |
792 | ||
793 | nd_region = to_nd_region(dev); | |
794 | if (nd_region->ndr_mappings == 0) | |
795 | return 0; | |
796 | ||
797 | memset(&label_id, 0, sizeof(label_id)); | |
798 | strcat(label_id.id, "pmem-reserve"); | |
799 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
800 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
801 | resource_size_t n, rem = 0; | |
802 | ||
803 | if (nd_mapping->nvdimm != nvdimm) | |
804 | continue; | |
805 | ||
806 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); | |
807 | if (n == 0) | |
808 | return 0; | |
809 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); | |
810 | dev_WARN_ONCE(&nd_region->dev, rem, | |
811 | "pmem reserve underrun: %#llx of %#llx bytes\n", | |
812 | (unsigned long long) n - rem, | |
813 | (unsigned long long) n); | |
814 | return rem ? -ENXIO : 0; | |
815 | } | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
820 | static void release_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
821 | struct nd_mapping *nd_mapping) | |
822 | { | |
823 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
824 | struct resource *res, *_res; | |
825 | ||
826 | for_each_dpa_resource_safe(ndd, res, _res) | |
827 | if (strcmp(res->name, "pmem-reserve") == 0) | |
828 | nvdimm_free_dpa(ndd, res); | |
829 | } | |
830 | ||
831 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
832 | struct nd_mapping *nd_mapping) | |
833 | { | |
834 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
835 | int rc; | |
836 | ||
837 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, | |
838 | __reserve_free_pmem); | |
839 | if (rc) | |
840 | release_free_pmem(nvdimm_bus, nd_mapping); | |
841 | return rc; | |
842 | } | |
843 | ||
bf9bccc1 DW |
844 | /** |
845 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id | |
846 | * @nd_region: the set of dimms to allocate @n more bytes from | |
847 | * @label_id: unique identifier for the namespace consuming this dpa range | |
848 | * @n: number of bytes per-dimm to add to the existing allocation | |
849 | * | |
850 | * Assumes resources are ordered. For BLK regions, first consume | |
851 | * BLK-only available DPA free space, then consume PMEM-aliased DPA | |
852 | * space starting at the highest DPA. For PMEM regions start | |
853 | * allocations from the start of an interleave set and end at the first | |
854 | * BLK allocation or the end of the interleave set, whichever comes | |
855 | * first. | |
856 | */ | |
857 | static int grow_dpa_allocation(struct nd_region *nd_region, | |
858 | struct nd_label_id *label_id, resource_size_t n) | |
859 | { | |
1b40e09a DW |
860 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
861 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
bf9bccc1 DW |
862 | int i; |
863 | ||
864 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
865 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1b40e09a DW |
866 | resource_size_t rem = n; |
867 | int rc, j; | |
868 | ||
869 | /* | |
870 | * In the BLK case try once with all unallocated PMEM | |
871 | * reserved, and once without | |
872 | */ | |
873 | for (j = is_pmem; j < 2; j++) { | |
874 | bool blk_only = j == 0; | |
875 | ||
876 | if (blk_only) { | |
877 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); | |
878 | if (rc) | |
879 | return rc; | |
880 | } | |
881 | rem = scan_allocate(nd_region, nd_mapping, | |
882 | label_id, rem); | |
883 | if (blk_only) | |
884 | release_free_pmem(nvdimm_bus, nd_mapping); | |
bf9bccc1 | 885 | |
1b40e09a DW |
886 | /* try again and allow encroachments into PMEM */ |
887 | if (rem == 0) | |
888 | break; | |
889 | } | |
890 | ||
891 | dev_WARN_ONCE(&nd_region->dev, rem, | |
892 | "allocation underrun: %#llx of %#llx bytes\n", | |
893 | (unsigned long long) n - rem, | |
894 | (unsigned long long) n); | |
895 | if (rem) | |
896 | return -ENXIO; | |
897 | ||
898 | rc = merge_dpa(nd_region, nd_mapping, label_id); | |
bf9bccc1 DW |
899 | if (rc) |
900 | return rc; | |
901 | } | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
0e3b0d12 | 906 | static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, |
bf9bccc1 DW |
907 | struct nd_namespace_pmem *nspm, resource_size_t size) |
908 | { | |
909 | struct resource *res = &nspm->nsio.res; | |
0e3b0d12 | 910 | resource_size_t offset = 0; |
bf9bccc1 | 911 | |
0e3b0d12 DW |
912 | if (size && !nspm->uuid) { |
913 | WARN_ON_ONCE(1); | |
914 | size = 0; | |
915 | } | |
916 | ||
917 | if (size && nspm->uuid) { | |
918 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
919 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
920 | struct nd_label_id label_id; | |
921 | struct resource *res; | |
922 | ||
923 | if (!ndd) { | |
924 | size = 0; | |
925 | goto out; | |
926 | } | |
927 | ||
928 | nd_label_gen_id(&label_id, nspm->uuid, 0); | |
929 | ||
930 | /* calculate a spa offset from the dpa allocation offset */ | |
931 | for_each_dpa_resource(ndd, res) | |
932 | if (strcmp(res->name, label_id.id) == 0) { | |
933 | offset = (res->start - nd_mapping->start) | |
934 | * nd_region->ndr_mappings; | |
935 | goto out; | |
936 | } | |
937 | ||
938 | WARN_ON_ONCE(1); | |
939 | size = 0; | |
940 | } | |
941 | ||
942 | out: | |
943 | res->start = nd_region->ndr_start + offset; | |
944 | res->end = res->start + size - 1; | |
bf9bccc1 DW |
945 | } |
946 | ||
bd26d0d0 DK |
947 | static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where) |
948 | { | |
949 | if (!uuid) { | |
950 | dev_dbg(dev, "%s: uuid not set\n", where); | |
951 | return true; | |
952 | } | |
953 | return false; | |
954 | } | |
955 | ||
bf9bccc1 DW |
956 | static ssize_t __size_store(struct device *dev, unsigned long long val) |
957 | { | |
958 | resource_size_t allocated = 0, available = 0; | |
959 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
960 | struct nd_mapping *nd_mapping; | |
961 | struct nvdimm_drvdata *ndd; | |
962 | struct nd_label_id label_id; | |
963 | u32 flags = 0, remainder; | |
964 | u8 *uuid = NULL; | |
965 | int rc, i; | |
966 | ||
8c2f7e86 | 967 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
968 | return -EBUSY; |
969 | ||
970 | if (is_namespace_pmem(dev)) { | |
971 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
972 | ||
973 | uuid = nspm->uuid; | |
974 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
975 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
976 | ||
977 | uuid = nsblk->uuid; | |
978 | flags = NSLABEL_FLAG_LOCAL; | |
bf9bccc1 DW |
979 | } |
980 | ||
981 | /* | |
982 | * We need a uuid for the allocation-label and dimm(s) on which | |
983 | * to store the label. | |
984 | */ | |
bd26d0d0 | 985 | if (uuid_not_set(uuid, dev, __func__)) |
bf9bccc1 | 986 | return -ENXIO; |
bd26d0d0 DK |
987 | if (nd_region->ndr_mappings == 0) { |
988 | dev_dbg(dev, "%s: not associated with dimm(s)\n", __func__); | |
989 | return -ENXIO; | |
990 | } | |
bf9bccc1 DW |
991 | |
992 | div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); | |
993 | if (remainder) { | |
994 | dev_dbg(dev, "%llu is not %dK aligned\n", val, | |
995 | (SZ_4K * nd_region->ndr_mappings) / SZ_1K); | |
996 | return -EINVAL; | |
997 | } | |
998 | ||
999 | nd_label_gen_id(&label_id, uuid, flags); | |
1000 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1001 | nd_mapping = &nd_region->mapping[i]; | |
1002 | ndd = to_ndd(nd_mapping); | |
1003 | ||
1004 | /* | |
1005 | * All dimms in an interleave set, or the base dimm for a blk | |
1006 | * region, need to be enabled for the size to be changed. | |
1007 | */ | |
1008 | if (!ndd) | |
1009 | return -ENXIO; | |
1010 | ||
1011 | allocated += nvdimm_allocated_dpa(ndd, &label_id); | |
1012 | } | |
1013 | available = nd_region_available_dpa(nd_region); | |
1014 | ||
1015 | if (val > available + allocated) | |
1016 | return -ENOSPC; | |
1017 | ||
1018 | if (val == allocated) | |
1019 | return 0; | |
1020 | ||
1021 | val = div_u64(val, nd_region->ndr_mappings); | |
1022 | allocated = div_u64(allocated, nd_region->ndr_mappings); | |
1023 | if (val < allocated) | |
1024 | rc = shrink_dpa_allocation(nd_region, &label_id, | |
1025 | allocated - val); | |
1026 | else | |
1027 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); | |
1028 | ||
1029 | if (rc) | |
1030 | return rc; | |
1031 | ||
1032 | if (is_namespace_pmem(dev)) { | |
1033 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1034 | ||
0e3b0d12 | 1035 | nd_namespace_pmem_set_resource(nd_region, nspm, |
bf9bccc1 | 1036 | val * nd_region->ndr_mappings); |
1b40e09a | 1037 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 DW |
1038 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1039 | ||
1b40e09a DW |
1040 | /* |
1041 | * Try to delete the namespace if we deleted all of its | |
8c2f7e86 DW |
1042 | * allocation, this is not the seed device for the |
1043 | * region, and it is not actively claimed by a btt | |
1044 | * instance. | |
1b40e09a | 1045 | */ |
8c2f7e86 DW |
1046 | if (val == 0 && nd_region->ns_seed != dev |
1047 | && !nsblk->common.claim) | |
1b40e09a | 1048 | nd_device_unregister(dev, ND_ASYNC); |
bf9bccc1 DW |
1049 | } |
1050 | ||
1051 | return rc; | |
1052 | } | |
1053 | ||
1054 | static ssize_t size_store(struct device *dev, | |
1055 | struct device_attribute *attr, const char *buf, size_t len) | |
1056 | { | |
f524bf27 | 1057 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
1058 | unsigned long long val; |
1059 | u8 **uuid = NULL; | |
1060 | int rc; | |
1061 | ||
1062 | rc = kstrtoull(buf, 0, &val); | |
1063 | if (rc) | |
1064 | return rc; | |
1065 | ||
1066 | device_lock(dev); | |
1067 | nvdimm_bus_lock(dev); | |
1068 | wait_nvdimm_bus_probe_idle(dev); | |
1069 | rc = __size_store(dev, val); | |
f524bf27 DW |
1070 | if (rc >= 0) |
1071 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
1072 | |
1073 | if (is_namespace_pmem(dev)) { | |
1074 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1075 | ||
1076 | uuid = &nspm->uuid; | |
1077 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1078 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1079 | ||
1080 | uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1081 | } |
1082 | ||
1083 | if (rc == 0 && val == 0 && uuid) { | |
1084 | /* setting size zero == 'delete namespace' */ | |
1085 | kfree(*uuid); | |
1086 | *uuid = NULL; | |
1087 | } | |
1088 | ||
1089 | dev_dbg(dev, "%s: %llx %s (%d)\n", __func__, val, rc < 0 | |
1090 | ? "fail" : "success", rc); | |
1091 | ||
1092 | nvdimm_bus_unlock(dev); | |
1093 | device_unlock(dev); | |
1094 | ||
f524bf27 | 1095 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1096 | } |
1097 | ||
8c2f7e86 | 1098 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc1 | 1099 | { |
8c2f7e86 | 1100 | struct device *dev = &ndns->dev; |
1b40e09a | 1101 | |
bf9bccc1 DW |
1102 | if (is_namespace_pmem(dev)) { |
1103 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1104 | ||
8c2f7e86 | 1105 | return resource_size(&nspm->nsio.res); |
bf9bccc1 | 1106 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 | 1107 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc1 DW |
1108 | } else if (is_namespace_io(dev)) { |
1109 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1110 | ||
8c2f7e86 DW |
1111 | return resource_size(&nsio->res); |
1112 | } else | |
1113 | WARN_ONCE(1, "unknown namespace type\n"); | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) | |
1118 | { | |
1119 | resource_size_t size; | |
1b40e09a | 1120 | |
8c2f7e86 DW |
1121 | nvdimm_bus_lock(&ndns->dev); |
1122 | size = __nvdimm_namespace_capacity(ndns); | |
1123 | nvdimm_bus_unlock(&ndns->dev); | |
1124 | ||
1125 | return size; | |
1126 | } | |
1127 | EXPORT_SYMBOL(nvdimm_namespace_capacity); | |
1128 | ||
1129 | static ssize_t size_show(struct device *dev, | |
1130 | struct device_attribute *attr, char *buf) | |
1131 | { | |
1132 | return sprintf(buf, "%llu\n", (unsigned long long) | |
1133 | nvdimm_namespace_capacity(to_ndns(dev))); | |
bf9bccc1 DW |
1134 | } |
1135 | static DEVICE_ATTR(size, S_IRUGO, size_show, size_store); | |
1136 | ||
f95b4bca | 1137 | static u8 *namespace_to_uuid(struct device *dev) |
bf9bccc1 | 1138 | { |
bf9bccc1 DW |
1139 | if (is_namespace_pmem(dev)) { |
1140 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1141 | ||
f95b4bca | 1142 | return nspm->uuid; |
bf9bccc1 | 1143 | } else if (is_namespace_blk(dev)) { |
1b40e09a DW |
1144 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1145 | ||
f95b4bca | 1146 | return nsblk->uuid; |
bf9bccc1 | 1147 | } else |
f95b4bca DW |
1148 | return ERR_PTR(-ENXIO); |
1149 | } | |
1150 | ||
1151 | static ssize_t uuid_show(struct device *dev, | |
1152 | struct device_attribute *attr, char *buf) | |
1153 | { | |
1154 | u8 *uuid = namespace_to_uuid(dev); | |
bf9bccc1 | 1155 | |
f95b4bca DW |
1156 | if (IS_ERR(uuid)) |
1157 | return PTR_ERR(uuid); | |
bf9bccc1 DW |
1158 | if (uuid) |
1159 | return sprintf(buf, "%pUb\n", uuid); | |
1160 | return sprintf(buf, "\n"); | |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" | |
1165 | * @nd_region: parent region so we can updates all dimms in the set | |
1166 | * @dev: namespace type for generating label_id | |
1167 | * @new_uuid: incoming uuid | |
1168 | * @old_uuid: reference to the uuid storage location in the namespace object | |
1169 | */ | |
1170 | static int namespace_update_uuid(struct nd_region *nd_region, | |
1171 | struct device *dev, u8 *new_uuid, u8 **old_uuid) | |
1172 | { | |
1173 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; | |
1174 | struct nd_label_id old_label_id; | |
1175 | struct nd_label_id new_label_id; | |
f524bf27 | 1176 | int i; |
bf9bccc1 | 1177 | |
f524bf27 DW |
1178 | if (!nd_is_uuid_unique(dev, new_uuid)) |
1179 | return -EINVAL; | |
bf9bccc1 DW |
1180 | |
1181 | if (*old_uuid == NULL) | |
1182 | goto out; | |
1183 | ||
f524bf27 DW |
1184 | /* |
1185 | * If we've already written a label with this uuid, then it's | |
1186 | * too late to rename because we can't reliably update the uuid | |
1187 | * without losing the old namespace. Userspace must delete this | |
1188 | * namespace to abandon the old uuid. | |
1189 | */ | |
1190 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1191 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1192 | ||
1193 | /* | |
1194 | * This check by itself is sufficient because old_uuid | |
1195 | * would be NULL above if this uuid did not exist in the | |
1196 | * currently written set. | |
1197 | * | |
1198 | * FIXME: can we delete uuid with zero dpa allocated? | |
1199 | */ | |
ae8219f1 | 1200 | if (list_empty(&nd_mapping->labels)) |
f524bf27 DW |
1201 | return -EBUSY; |
1202 | } | |
1203 | ||
bf9bccc1 DW |
1204 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
1205 | nd_label_gen_id(&new_label_id, new_uuid, flags); | |
1206 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1207 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1208 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1209 | struct resource *res; | |
1210 | ||
1211 | for_each_dpa_resource(ndd, res) | |
1212 | if (strcmp(res->name, old_label_id.id) == 0) | |
1213 | sprintf((void *) res->name, "%s", | |
1214 | new_label_id.id); | |
1215 | } | |
1216 | kfree(*old_uuid); | |
1217 | out: | |
1218 | *old_uuid = new_uuid; | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | static ssize_t uuid_store(struct device *dev, | |
1223 | struct device_attribute *attr, const char *buf, size_t len) | |
1224 | { | |
1225 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1226 | u8 *uuid = NULL; | |
8c2f7e86 | 1227 | ssize_t rc = 0; |
bf9bccc1 | 1228 | u8 **ns_uuid; |
bf9bccc1 DW |
1229 | |
1230 | if (is_namespace_pmem(dev)) { | |
1231 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1232 | ||
1233 | ns_uuid = &nspm->uuid; | |
1234 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1235 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1236 | ||
1237 | ns_uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1238 | } else |
1239 | return -ENXIO; | |
1240 | ||
1241 | device_lock(dev); | |
1242 | nvdimm_bus_lock(dev); | |
1243 | wait_nvdimm_bus_probe_idle(dev); | |
8c2f7e86 DW |
1244 | if (to_ndns(dev)->claim) |
1245 | rc = -EBUSY; | |
1246 | if (rc >= 0) | |
1247 | rc = nd_uuid_store(dev, &uuid, buf, len); | |
bf9bccc1 DW |
1248 | if (rc >= 0) |
1249 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); | |
f524bf27 DW |
1250 | if (rc >= 0) |
1251 | rc = nd_namespace_label_update(nd_region, dev); | |
1252 | else | |
1253 | kfree(uuid); | |
bf9bccc1 DW |
1254 | dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__, |
1255 | rc, buf, buf[len - 1] == '\n' ? "" : "\n"); | |
1256 | nvdimm_bus_unlock(dev); | |
1257 | device_unlock(dev); | |
1258 | ||
f524bf27 | 1259 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1260 | } |
1261 | static DEVICE_ATTR_RW(uuid); | |
1262 | ||
1263 | static ssize_t resource_show(struct device *dev, | |
1264 | struct device_attribute *attr, char *buf) | |
1265 | { | |
1266 | struct resource *res; | |
1267 | ||
1268 | if (is_namespace_pmem(dev)) { | |
1269 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1270 | ||
1271 | res = &nspm->nsio.res; | |
1272 | } else if (is_namespace_io(dev)) { | |
1273 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1274 | ||
1275 | res = &nsio->res; | |
1276 | } else | |
1277 | return -ENXIO; | |
1278 | ||
1279 | /* no address to convey if the namespace has no allocation */ | |
1280 | if (resource_size(res) == 0) | |
1281 | return -ENXIO; | |
1282 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); | |
1283 | } | |
1284 | static DEVICE_ATTR_RO(resource); | |
1285 | ||
fcae6957 VV |
1286 | static const unsigned long ns_lbasize_supported[] = { 512, 520, 528, |
1287 | 4096, 4104, 4160, 4224, 0 }; | |
1b40e09a DW |
1288 | |
1289 | static ssize_t sector_size_show(struct device *dev, | |
1290 | struct device_attribute *attr, char *buf) | |
1291 | { | |
1292 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1293 | ||
1294 | if (!is_namespace_blk(dev)) | |
1295 | return -ENXIO; | |
1296 | ||
1297 | return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf); | |
1298 | } | |
1299 | ||
1300 | static ssize_t sector_size_store(struct device *dev, | |
1301 | struct device_attribute *attr, const char *buf, size_t len) | |
1302 | { | |
1303 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
f524bf27 | 1304 | struct nd_region *nd_region = to_nd_region(dev->parent); |
8c2f7e86 | 1305 | ssize_t rc = 0; |
1b40e09a DW |
1306 | |
1307 | if (!is_namespace_blk(dev)) | |
1308 | return -ENXIO; | |
1309 | ||
1310 | device_lock(dev); | |
1311 | nvdimm_bus_lock(dev); | |
8c2f7e86 DW |
1312 | if (to_ndns(dev)->claim) |
1313 | rc = -EBUSY; | |
1314 | if (rc >= 0) | |
1315 | rc = nd_sector_size_store(dev, buf, &nsblk->lbasize, | |
1316 | ns_lbasize_supported); | |
f524bf27 DW |
1317 | if (rc >= 0) |
1318 | rc = nd_namespace_label_update(nd_region, dev); | |
1319 | dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__, | |
1320 | rc, rc < 0 ? "tried" : "wrote", buf, | |
1321 | buf[len - 1] == '\n' ? "" : "\n"); | |
1b40e09a DW |
1322 | nvdimm_bus_unlock(dev); |
1323 | device_unlock(dev); | |
1324 | ||
1325 | return rc ? rc : len; | |
1326 | } | |
1327 | static DEVICE_ATTR_RW(sector_size); | |
1328 | ||
0ba1c634 DW |
1329 | static ssize_t dpa_extents_show(struct device *dev, |
1330 | struct device_attribute *attr, char *buf) | |
1331 | { | |
1332 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1333 | struct nd_label_id label_id; | |
1334 | int count = 0, i; | |
1335 | u8 *uuid = NULL; | |
1336 | u32 flags = 0; | |
1337 | ||
1338 | nvdimm_bus_lock(dev); | |
1339 | if (is_namespace_pmem(dev)) { | |
1340 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1341 | ||
1342 | uuid = nspm->uuid; | |
1343 | flags = 0; | |
1344 | } else if (is_namespace_blk(dev)) { | |
1345 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1346 | ||
1347 | uuid = nsblk->uuid; | |
1348 | flags = NSLABEL_FLAG_LOCAL; | |
1349 | } | |
1350 | ||
1351 | if (!uuid) | |
1352 | goto out; | |
1353 | ||
1354 | nd_label_gen_id(&label_id, uuid, flags); | |
1355 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1356 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1357 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1358 | struct resource *res; | |
1359 | ||
1360 | for_each_dpa_resource(ndd, res) | |
1361 | if (strcmp(res->name, label_id.id) == 0) | |
1362 | count++; | |
1363 | } | |
1364 | out: | |
1365 | nvdimm_bus_unlock(dev); | |
1366 | ||
1367 | return sprintf(buf, "%d\n", count); | |
1368 | } | |
1369 | static DEVICE_ATTR_RO(dpa_extents); | |
1370 | ||
8c2f7e86 DW |
1371 | static ssize_t holder_show(struct device *dev, |
1372 | struct device_attribute *attr, char *buf) | |
1373 | { | |
1374 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1375 | ssize_t rc; | |
1376 | ||
1377 | device_lock(dev); | |
1378 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); | |
1379 | device_unlock(dev); | |
1380 | ||
1381 | return rc; | |
1382 | } | |
1383 | static DEVICE_ATTR_RO(holder); | |
1384 | ||
0731de0d DW |
1385 | static ssize_t mode_show(struct device *dev, |
1386 | struct device_attribute *attr, char *buf) | |
1387 | { | |
1388 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1389 | struct device *claim; | |
1390 | char *mode; | |
1391 | ssize_t rc; | |
1392 | ||
1393 | device_lock(dev); | |
1394 | claim = ndns->claim; | |
9c412428 | 1395 | if (claim && is_nd_btt(claim)) |
0731de0d | 1396 | mode = "safe"; |
9c412428 DW |
1397 | else if (claim && is_nd_pfn(claim)) |
1398 | mode = "memory"; | |
cd03412a DW |
1399 | else if (claim && is_nd_dax(claim)) |
1400 | mode = "dax"; | |
9c412428 DW |
1401 | else if (!claim && pmem_should_map_pages(dev)) |
1402 | mode = "memory"; | |
0731de0d DW |
1403 | else |
1404 | mode = "raw"; | |
1405 | rc = sprintf(buf, "%s\n", mode); | |
1406 | device_unlock(dev); | |
1407 | ||
1408 | return rc; | |
1409 | } | |
1410 | static DEVICE_ATTR_RO(mode); | |
1411 | ||
8c2f7e86 DW |
1412 | static ssize_t force_raw_store(struct device *dev, |
1413 | struct device_attribute *attr, const char *buf, size_t len) | |
1414 | { | |
1415 | bool force_raw; | |
1416 | int rc = strtobool(buf, &force_raw); | |
1417 | ||
1418 | if (rc) | |
1419 | return rc; | |
1420 | ||
1421 | to_ndns(dev)->force_raw = force_raw; | |
1422 | return len; | |
1423 | } | |
1424 | ||
1425 | static ssize_t force_raw_show(struct device *dev, | |
1426 | struct device_attribute *attr, char *buf) | |
1427 | { | |
1428 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); | |
1429 | } | |
1430 | static DEVICE_ATTR_RW(force_raw); | |
1431 | ||
3d88002e DW |
1432 | static struct attribute *nd_namespace_attributes[] = { |
1433 | &dev_attr_nstype.attr, | |
bf9bccc1 | 1434 | &dev_attr_size.attr, |
0731de0d | 1435 | &dev_attr_mode.attr, |
bf9bccc1 | 1436 | &dev_attr_uuid.attr, |
8c2f7e86 | 1437 | &dev_attr_holder.attr, |
bf9bccc1 DW |
1438 | &dev_attr_resource.attr, |
1439 | &dev_attr_alt_name.attr, | |
8c2f7e86 | 1440 | &dev_attr_force_raw.attr, |
1b40e09a | 1441 | &dev_attr_sector_size.attr, |
0ba1c634 | 1442 | &dev_attr_dpa_extents.attr, |
3d88002e DW |
1443 | NULL, |
1444 | }; | |
1445 | ||
bf9bccc1 DW |
1446 | static umode_t namespace_visible(struct kobject *kobj, |
1447 | struct attribute *a, int n) | |
1448 | { | |
1449 | struct device *dev = container_of(kobj, struct device, kobj); | |
1450 | ||
1451 | if (a == &dev_attr_resource.attr) { | |
1452 | if (is_namespace_blk(dev)) | |
1453 | return 0; | |
1454 | return a->mode; | |
1455 | } | |
1456 | ||
1457 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { | |
1458 | if (a == &dev_attr_size.attr) | |
1459 | return S_IWUSR | S_IRUGO; | |
1b40e09a DW |
1460 | |
1461 | if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr) | |
1462 | return 0; | |
1463 | ||
bf9bccc1 DW |
1464 | return a->mode; |
1465 | } | |
1466 | ||
8c2f7e86 DW |
1467 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
1468 | || a == &dev_attr_holder.attr | |
0731de0d DW |
1469 | || a == &dev_attr_force_raw.attr |
1470 | || a == &dev_attr_mode.attr) | |
bf9bccc1 DW |
1471 | return a->mode; |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
3d88002e DW |
1476 | static struct attribute_group nd_namespace_attribute_group = { |
1477 | .attrs = nd_namespace_attributes, | |
bf9bccc1 | 1478 | .is_visible = namespace_visible, |
3d88002e DW |
1479 | }; |
1480 | ||
1481 | static const struct attribute_group *nd_namespace_attribute_groups[] = { | |
1482 | &nd_device_attribute_group, | |
1483 | &nd_namespace_attribute_group, | |
74ae66c3 | 1484 | &nd_numa_attribute_group, |
3d88002e DW |
1485 | NULL, |
1486 | }; | |
1487 | ||
8c2f7e86 DW |
1488 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
1489 | { | |
1490 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; | |
e1455744 | 1491 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
cd03412a | 1492 | struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL; |
0bfb8dd3 | 1493 | struct nd_namespace_common *ndns = NULL; |
8c2f7e86 DW |
1494 | resource_size_t size; |
1495 | ||
cd03412a | 1496 | if (nd_btt || nd_pfn || nd_dax) { |
0bfb8dd3 | 1497 | if (nd_btt) |
e1455744 | 1498 | ndns = nd_btt->ndns; |
0bfb8dd3 | 1499 | else if (nd_pfn) |
e1455744 | 1500 | ndns = nd_pfn->ndns; |
cd03412a DW |
1501 | else if (nd_dax) |
1502 | ndns = nd_dax->nd_pfn.ndns; | |
e1455744 | 1503 | |
0bfb8dd3 | 1504 | if (!ndns) |
8c2f7e86 DW |
1505 | return ERR_PTR(-ENODEV); |
1506 | ||
1507 | /* | |
1508 | * Flush any in-progess probes / removals in the driver | |
1509 | * for the raw personality of this namespace. | |
1510 | */ | |
1511 | device_lock(&ndns->dev); | |
1512 | device_unlock(&ndns->dev); | |
1513 | if (ndns->dev.driver) { | |
1514 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", | |
0bfb8dd3 | 1515 | dev_name(dev)); |
8c2f7e86 DW |
1516 | return ERR_PTR(-EBUSY); |
1517 | } | |
0bfb8dd3 | 1518 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != dev, |
8c2f7e86 | 1519 | "host (%s) vs claim (%s) mismatch\n", |
0bfb8dd3 | 1520 | dev_name(dev), |
8c2f7e86 DW |
1521 | dev_name(ndns->claim))) |
1522 | return ERR_PTR(-ENXIO); | |
1523 | } else { | |
1524 | ndns = to_ndns(dev); | |
1525 | if (ndns->claim) { | |
1526 | dev_dbg(dev, "claimed by %s, failing probe\n", | |
1527 | dev_name(ndns->claim)); | |
1528 | ||
1529 | return ERR_PTR(-ENXIO); | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | size = nvdimm_namespace_capacity(ndns); | |
1534 | if (size < ND_MIN_NAMESPACE_SIZE) { | |
1535 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", | |
1536 | &size, ND_MIN_NAMESPACE_SIZE); | |
1537 | return ERR_PTR(-ENODEV); | |
1538 | } | |
1539 | ||
1540 | if (is_namespace_pmem(&ndns->dev)) { | |
1541 | struct nd_namespace_pmem *nspm; | |
1542 | ||
1543 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
bd26d0d0 | 1544 | if (uuid_not_set(nspm->uuid, &ndns->dev, __func__)) |
8c2f7e86 | 1545 | return ERR_PTR(-ENODEV); |
8c2f7e86 | 1546 | } else if (is_namespace_blk(&ndns->dev)) { |
047fc8a1 RZ |
1547 | struct nd_namespace_blk *nsblk; |
1548 | ||
1549 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
bd26d0d0 DK |
1550 | if (uuid_not_set(nsblk->uuid, &ndns->dev, __func__)) |
1551 | return ERR_PTR(-ENODEV); | |
1552 | if (!nsblk->lbasize) { | |
1553 | dev_dbg(&ndns->dev, "%s: sector size not set\n", | |
1554 | __func__); | |
1555 | return ERR_PTR(-ENODEV); | |
1556 | } | |
047fc8a1 RZ |
1557 | if (!nd_namespace_blk_validate(nsblk)) |
1558 | return ERR_PTR(-ENODEV); | |
8c2f7e86 DW |
1559 | } |
1560 | ||
1561 | return ndns; | |
1562 | } | |
1563 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); | |
1564 | ||
3d88002e DW |
1565 | static struct device **create_namespace_io(struct nd_region *nd_region) |
1566 | { | |
1567 | struct nd_namespace_io *nsio; | |
1568 | struct device *dev, **devs; | |
1569 | struct resource *res; | |
1570 | ||
1571 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); | |
1572 | if (!nsio) | |
1573 | return NULL; | |
1574 | ||
1575 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1576 | if (!devs) { | |
1577 | kfree(nsio); | |
1578 | return NULL; | |
1579 | } | |
1580 | ||
8c2f7e86 | 1581 | dev = &nsio->common.dev; |
3d88002e DW |
1582 | dev->type = &namespace_io_device_type; |
1583 | dev->parent = &nd_region->dev; | |
1584 | res = &nsio->res; | |
1585 | res->name = dev_name(&nd_region->dev); | |
1586 | res->flags = IORESOURCE_MEM; | |
1587 | res->start = nd_region->ndr_start; | |
1588 | res->end = res->start + nd_region->ndr_size - 1; | |
1589 | ||
1590 | devs[0] = dev; | |
1591 | return devs; | |
1592 | } | |
1593 | ||
bf9bccc1 DW |
1594 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
1595 | u64 cookie, u16 pos) | |
1596 | { | |
1597 | struct nd_namespace_label *found = NULL; | |
1598 | int i; | |
1599 | ||
1600 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1601 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
ae8219f1 | 1602 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1603 | bool found_uuid = false; |
bf9bccc1 | 1604 | |
ae8219f1 DW |
1605 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1606 | struct nd_namespace_label *nd_label = label_ent->label; | |
1607 | u16 position, nlabel; | |
1608 | u64 isetcookie; | |
1609 | ||
1610 | if (!nd_label) | |
1611 | continue; | |
1612 | isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1613 | position = __le16_to_cpu(nd_label->position); | |
1614 | nlabel = __le16_to_cpu(nd_label->nlabel); | |
bf9bccc1 DW |
1615 | |
1616 | if (isetcookie != cookie) | |
1617 | continue; | |
1618 | ||
1619 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1620 | continue; | |
1621 | ||
1622 | if (found_uuid) { | |
1623 | dev_dbg(to_ndd(nd_mapping)->dev, | |
1624 | "%s duplicate entry for uuid\n", | |
1625 | __func__); | |
1626 | return false; | |
1627 | } | |
1628 | found_uuid = true; | |
1629 | if (nlabel != nd_region->ndr_mappings) | |
1630 | continue; | |
1631 | if (position != pos) | |
1632 | continue; | |
1633 | found = nd_label; | |
1634 | break; | |
1635 | } | |
1636 | if (found) | |
1637 | break; | |
1638 | } | |
1639 | return found != NULL; | |
1640 | } | |
1641 | ||
1642 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) | |
1643 | { | |
bf9bccc1 DW |
1644 | int i; |
1645 | ||
1646 | if (!pmem_id) | |
1647 | return -ENODEV; | |
1648 | ||
1649 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1650 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
0e3b0d12 | 1651 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
ae8219f1 | 1652 | struct nd_namespace_label *nd_label = NULL; |
bf9bccc1 | 1653 | u64 hw_start, hw_end, pmem_start, pmem_end; |
ae8219f1 | 1654 | struct nd_label_ent *label_ent; |
bf9bccc1 | 1655 | |
8a5f50d3 | 1656 | WARN_ON(!mutex_is_locked(&nd_mapping->lock)); |
ae8219f1 DW |
1657 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
1658 | nd_label = label_ent->label; | |
1659 | if (!nd_label) | |
1660 | continue; | |
bf9bccc1 DW |
1661 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) |
1662 | break; | |
ae8219f1 DW |
1663 | nd_label = NULL; |
1664 | } | |
bf9bccc1 DW |
1665 | |
1666 | if (!nd_label) { | |
1667 | WARN_ON(1); | |
1668 | return -EINVAL; | |
1669 | } | |
1670 | ||
bf9bccc1 DW |
1671 | /* |
1672 | * Check that this label is compliant with the dpa | |
1673 | * range published in NFIT | |
1674 | */ | |
1675 | hw_start = nd_mapping->start; | |
1676 | hw_end = hw_start + nd_mapping->size; | |
ae8219f1 DW |
1677 | pmem_start = __le64_to_cpu(nd_label->dpa); |
1678 | pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize); | |
0e3b0d12 DW |
1679 | if (pmem_start >= hw_start && pmem_start < hw_end |
1680 | && pmem_end <= hw_end && pmem_end > hw_start) | |
bf9bccc1 | 1681 | /* pass */; |
0e3b0d12 DW |
1682 | else { |
1683 | dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n", | |
1684 | dev_name(ndd->dev), nd_label->uuid); | |
bf9bccc1 | 1685 | return -EINVAL; |
0e3b0d12 | 1686 | } |
bf9bccc1 | 1687 | |
8a5f50d3 DW |
1688 | /* move recently validated label to the front of the list */ |
1689 | list_move(&label_ent->list, &nd_mapping->labels); | |
bf9bccc1 DW |
1690 | } |
1691 | return 0; | |
1692 | } | |
1693 | ||
1694 | /** | |
8a5f50d3 | 1695 | * create_namespace_pmem - validate interleave set labelling, retrieve label0 |
bf9bccc1 | 1696 | * @nd_region: region with mappings to validate |
8a5f50d3 DW |
1697 | * @nspm: target namespace to create |
1698 | * @nd_label: target pmem namespace label to evaluate | |
bf9bccc1 | 1699 | */ |
8a5f50d3 DW |
1700 | struct device *create_namespace_pmem(struct nd_region *nd_region, |
1701 | struct nd_namespace_label *nd_label) | |
bf9bccc1 DW |
1702 | { |
1703 | u64 cookie = nd_region_interleave_set_cookie(nd_region); | |
ae8219f1 | 1704 | struct nd_label_ent *label_ent; |
8a5f50d3 | 1705 | struct nd_namespace_pmem *nspm; |
ae8219f1 | 1706 | struct nd_mapping *nd_mapping; |
bf9bccc1 | 1707 | resource_size_t size = 0; |
8a5f50d3 DW |
1708 | struct resource *res; |
1709 | struct device *dev; | |
ae8219f1 | 1710 | int rc = 0; |
bf9bccc1 DW |
1711 | u16 i; |
1712 | ||
4765218d DW |
1713 | if (cookie == 0) { |
1714 | dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n"); | |
8a5f50d3 | 1715 | return ERR_PTR(-ENXIO); |
4765218d | 1716 | } |
bf9bccc1 | 1717 | |
8a5f50d3 DW |
1718 | if (__le64_to_cpu(nd_label->isetcookie) != cookie) { |
1719 | dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n", | |
1720 | nd_label->uuid); | |
1721 | return ERR_PTR(-EAGAIN); | |
ae8219f1 | 1722 | } |
bf9bccc1 | 1723 | |
8a5f50d3 DW |
1724 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); |
1725 | if (!nspm) | |
1726 | return ERR_PTR(-ENOMEM); | |
ae8219f1 | 1727 | |
0e3b0d12 | 1728 | nspm->id = -1; |
8a5f50d3 DW |
1729 | dev = &nspm->nsio.common.dev; |
1730 | dev->type = &namespace_pmem_device_type; | |
1731 | dev->parent = &nd_region->dev; | |
1732 | res = &nspm->nsio.res; | |
1733 | res->name = dev_name(&nd_region->dev); | |
1734 | res->flags = IORESOURCE_MEM; | |
ae8219f1 | 1735 | |
8a5f50d3 DW |
1736 | for (i = 0; i < nd_region->ndr_mappings; i++) |
1737 | if (!has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) | |
1738 | break; | |
1739 | if (i < nd_region->ndr_mappings) { | |
0e3b0d12 DW |
1740 | struct nvdimm_drvdata *ndd = to_ndd(&nd_region->mapping[i]); |
1741 | ||
8a5f50d3 DW |
1742 | /* |
1743 | * Give up if we don't find an instance of a uuid at each | |
1744 | * position (from 0 to nd_region->ndr_mappings - 1), or if we | |
1745 | * find a dimm with two instances of the same uuid. | |
1746 | */ | |
0e3b0d12 DW |
1747 | dev_err(&nd_region->dev, "%s missing label for %pUb\n", |
1748 | dev_name(ndd->dev), nd_label->uuid); | |
8a5f50d3 | 1749 | rc = -EINVAL; |
ae8219f1 | 1750 | goto err; |
8a5f50d3 | 1751 | } |
bf9bccc1 DW |
1752 | |
1753 | /* | |
1754 | * Fix up each mapping's 'labels' to have the validated pmem label for | |
1755 | * that position at labels[0], and NULL at labels[1]. In the process, | |
1756 | * check that the namespace aligns with interleave-set. We know | |
1757 | * that it does not overlap with any blk namespaces by virtue of | |
1758 | * the dimm being enabled (i.e. nd_label_reserve_dpa() | |
1759 | * succeeded). | |
1760 | */ | |
8a5f50d3 | 1761 | rc = select_pmem_id(nd_region, nd_label->uuid); |
bf9bccc1 DW |
1762 | if (rc) |
1763 | goto err; | |
1764 | ||
1765 | /* Calculate total size and populate namespace properties from label0 */ | |
1766 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
ae8219f1 DW |
1767 | struct nd_namespace_label *label0; |
1768 | ||
1769 | nd_mapping = &nd_region->mapping[i]; | |
ae8219f1 DW |
1770 | label_ent = list_first_entry_or_null(&nd_mapping->labels, |
1771 | typeof(*label_ent), list); | |
1772 | label0 = label_ent ? label_ent->label : 0; | |
ae8219f1 DW |
1773 | |
1774 | if (!label0) { | |
1775 | WARN_ON(1); | |
1776 | continue; | |
1777 | } | |
bf9bccc1 DW |
1778 | |
1779 | size += __le64_to_cpu(label0->rawsize); | |
1780 | if (__le16_to_cpu(label0->position) != 0) | |
1781 | continue; | |
1782 | WARN_ON(nspm->alt_name || nspm->uuid); | |
1783 | nspm->alt_name = kmemdup((void __force *) label0->name, | |
1784 | NSLABEL_NAME_LEN, GFP_KERNEL); | |
1785 | nspm->uuid = kmemdup((void __force *) label0->uuid, | |
1786 | NSLABEL_UUID_LEN, GFP_KERNEL); | |
1787 | } | |
1788 | ||
1789 | if (!nspm->alt_name || !nspm->uuid) { | |
1790 | rc = -ENOMEM; | |
1791 | goto err; | |
1792 | } | |
1793 | ||
0e3b0d12 | 1794 | nd_namespace_pmem_set_resource(nd_region, nspm, size); |
bf9bccc1 | 1795 | |
8a5f50d3 | 1796 | return dev; |
bf9bccc1 | 1797 | err: |
8a5f50d3 | 1798 | namespace_pmem_release(dev); |
bf9bccc1 DW |
1799 | switch (rc) { |
1800 | case -EINVAL: | |
1801 | dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__); | |
1802 | break; | |
1803 | case -ENODEV: | |
1804 | dev_dbg(&nd_region->dev, "%s: label not found\n", __func__); | |
1805 | break; | |
1806 | default: | |
1807 | dev_dbg(&nd_region->dev, "%s: unexpected err: %d\n", | |
1808 | __func__, rc); | |
1809 | break; | |
1810 | } | |
8a5f50d3 | 1811 | return ERR_PTR(rc); |
bf9bccc1 DW |
1812 | } |
1813 | ||
1b40e09a DW |
1814 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
1815 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, | |
1816 | resource_size_t start) | |
1817 | { | |
1818 | struct nd_label_id label_id; | |
1819 | struct resource *res; | |
1820 | ||
1821 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
1822 | res = krealloc(nsblk->res, | |
1823 | sizeof(void *) * (nsblk->num_resources + 1), | |
1824 | GFP_KERNEL); | |
1825 | if (!res) | |
1826 | return NULL; | |
1827 | nsblk->res = (struct resource **) res; | |
1828 | for_each_dpa_resource(ndd, res) | |
1829 | if (strcmp(res->name, label_id.id) == 0 | |
1830 | && res->start == start) { | |
1831 | nsblk->res[nsblk->num_resources++] = res; | |
1832 | return res; | |
1833 | } | |
1834 | return NULL; | |
1835 | } | |
1836 | ||
1837 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) | |
1838 | { | |
1839 | struct nd_namespace_blk *nsblk; | |
1840 | struct device *dev; | |
1841 | ||
1842 | if (!is_nd_blk(&nd_region->dev)) | |
1843 | return NULL; | |
1844 | ||
1845 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1846 | if (!nsblk) | |
1847 | return NULL; | |
1848 | ||
8c2f7e86 | 1849 | dev = &nsblk->common.dev; |
1b40e09a DW |
1850 | dev->type = &namespace_blk_device_type; |
1851 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
1852 | if (nsblk->id < 0) { | |
1853 | kfree(nsblk); | |
1854 | return NULL; | |
1855 | } | |
1856 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); | |
1857 | dev->parent = &nd_region->dev; | |
1858 | dev->groups = nd_namespace_attribute_groups; | |
1859 | ||
8c2f7e86 | 1860 | return &nsblk->common.dev; |
1b40e09a DW |
1861 | } |
1862 | ||
98a29c39 DW |
1863 | static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) |
1864 | { | |
1865 | struct nd_namespace_pmem *nspm; | |
1866 | struct resource *res; | |
1867 | struct device *dev; | |
1868 | ||
1869 | if (!is_nd_pmem(&nd_region->dev)) | |
1870 | return NULL; | |
1871 | ||
1872 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
1873 | if (!nspm) | |
1874 | return NULL; | |
1875 | ||
1876 | dev = &nspm->nsio.common.dev; | |
1877 | dev->type = &namespace_pmem_device_type; | |
1878 | dev->parent = &nd_region->dev; | |
1879 | res = &nspm->nsio.res; | |
1880 | res->name = dev_name(&nd_region->dev); | |
1881 | res->flags = IORESOURCE_MEM; | |
1882 | ||
1883 | nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
1884 | if (nspm->id < 0) { | |
1885 | kfree(nspm); | |
1886 | return NULL; | |
1887 | } | |
1888 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id); | |
1889 | dev->parent = &nd_region->dev; | |
1890 | dev->groups = nd_namespace_attribute_groups; | |
1891 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); | |
1892 | ||
1893 | return dev; | |
1894 | } | |
1895 | ||
1896 | void nd_region_create_ns_seed(struct nd_region *nd_region) | |
1b40e09a DW |
1897 | { |
1898 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
98a29c39 DW |
1899 | |
1900 | if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) | |
1901 | return; | |
1902 | ||
1903 | if (is_nd_blk(&nd_region->dev)) | |
1904 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); | |
1905 | else | |
1906 | nd_region->ns_seed = nd_namespace_pmem_create(nd_region); | |
1907 | ||
1b40e09a DW |
1908 | /* |
1909 | * Seed creation failures are not fatal, provisioning is simply | |
1910 | * disabled until memory becomes available | |
1911 | */ | |
1912 | if (!nd_region->ns_seed) | |
98a29c39 DW |
1913 | dev_err(&nd_region->dev, "failed to create %s namespace\n", |
1914 | is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); | |
1b40e09a DW |
1915 | else |
1916 | nd_device_register(nd_region->ns_seed); | |
1917 | } | |
1918 | ||
cd03412a DW |
1919 | void nd_region_create_dax_seed(struct nd_region *nd_region) |
1920 | { | |
1921 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1922 | nd_region->dax_seed = nd_dax_create(nd_region); | |
1923 | /* | |
1924 | * Seed creation failures are not fatal, provisioning is simply | |
1925 | * disabled until memory becomes available | |
1926 | */ | |
1927 | if (!nd_region->dax_seed) | |
1928 | dev_err(&nd_region->dev, "failed to create dax namespace\n"); | |
1929 | } | |
1930 | ||
2dc43331 DW |
1931 | void nd_region_create_pfn_seed(struct nd_region *nd_region) |
1932 | { | |
1933 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1934 | nd_region->pfn_seed = nd_pfn_create(nd_region); | |
1935 | /* | |
1936 | * Seed creation failures are not fatal, provisioning is simply | |
1937 | * disabled until memory becomes available | |
1938 | */ | |
1939 | if (!nd_region->pfn_seed) | |
1940 | dev_err(&nd_region->dev, "failed to create pfn namespace\n"); | |
1941 | } | |
1942 | ||
8c2f7e86 DW |
1943 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
1944 | { | |
1945 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1946 | nd_region->btt_seed = nd_btt_create(nd_region); | |
1947 | /* | |
1948 | * Seed creation failures are not fatal, provisioning is simply | |
1949 | * disabled until memory becomes available | |
1950 | */ | |
1951 | if (!nd_region->btt_seed) | |
1952 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); | |
1953 | } | |
1954 | ||
8a5f50d3 DW |
1955 | static int add_namespace_resource(struct nd_region *nd_region, |
1956 | struct nd_namespace_label *nd_label, struct device **devs, | |
1957 | int count) | |
1b40e09a | 1958 | { |
8a5f50d3 DW |
1959 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
1960 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1961 | int i; | |
1962 | ||
1963 | for (i = 0; i < count; i++) { | |
1964 | u8 *uuid = namespace_to_uuid(devs[i]); | |
1965 | struct resource *res; | |
1966 | ||
1967 | if (IS_ERR_OR_NULL(uuid)) { | |
1968 | WARN_ON(1); | |
1969 | continue; | |
1970 | } | |
1971 | ||
1972 | if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0) | |
1973 | continue; | |
1974 | if (is_namespace_blk(devs[i])) { | |
1975 | res = nsblk_add_resource(nd_region, ndd, | |
1976 | to_nd_namespace_blk(devs[i]), | |
1977 | __le64_to_cpu(nd_label->dpa)); | |
1978 | if (!res) | |
1979 | return -ENXIO; | |
1980 | nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count); | |
1981 | } else { | |
1982 | dev_err(&nd_region->dev, | |
1983 | "error: conflicting extents for uuid: %pUb\n", | |
1984 | nd_label->uuid); | |
1985 | return -ENXIO; | |
1986 | } | |
1987 | break; | |
1988 | } | |
1989 | ||
1990 | return i; | |
1991 | } | |
1992 | ||
1993 | struct device *create_namespace_blk(struct nd_region *nd_region, | |
1994 | struct nd_namespace_label *nd_label, int count) | |
1995 | { | |
1996 | ||
1997 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
ae8219f1 | 1998 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1b40e09a | 1999 | struct nd_namespace_blk *nsblk; |
8a5f50d3 DW |
2000 | char *name[NSLABEL_NAME_LEN]; |
2001 | struct device *dev = NULL; | |
2002 | struct resource *res; | |
2003 | ||
2004 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2005 | if (!nsblk) | |
2006 | return ERR_PTR(-ENOMEM); | |
2007 | dev = &nsblk->common.dev; | |
2008 | dev->type = &namespace_blk_device_type; | |
2009 | dev->parent = &nd_region->dev; | |
2010 | nsblk->id = -1; | |
2011 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); | |
2012 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, | |
2013 | GFP_KERNEL); | |
2014 | if (!nsblk->uuid) | |
2015 | goto blk_err; | |
2016 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); | |
2017 | if (name[0]) | |
2018 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, | |
2019 | GFP_KERNEL); | |
2020 | res = nsblk_add_resource(nd_region, ndd, nsblk, | |
2021 | __le64_to_cpu(nd_label->dpa)); | |
2022 | if (!res) | |
2023 | goto blk_err; | |
2024 | nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count); | |
2025 | return dev; | |
2026 | blk_err: | |
2027 | namespace_blk_release(dev); | |
2028 | return ERR_PTR(-ENXIO); | |
2029 | } | |
2030 | ||
6ff3e912 DW |
2031 | static int cmp_dpa(const void *a, const void *b) |
2032 | { | |
2033 | const struct device *dev_a = *(const struct device **) a; | |
2034 | const struct device *dev_b = *(const struct device **) b; | |
2035 | struct nd_namespace_blk *nsblk_a, *nsblk_b; | |
2036 | struct nd_namespace_pmem *nspm_a, *nspm_b; | |
2037 | ||
2038 | if (is_namespace_io(dev_a)) | |
2039 | return 0; | |
2040 | ||
2041 | if (is_namespace_blk(dev_a)) { | |
2042 | nsblk_a = to_nd_namespace_blk(dev_a); | |
2043 | nsblk_b = to_nd_namespace_blk(dev_b); | |
2044 | ||
2045 | return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start, | |
2046 | sizeof(resource_size_t)); | |
2047 | } | |
2048 | ||
2049 | nspm_a = to_nd_namespace_pmem(dev_a); | |
2050 | nspm_b = to_nd_namespace_pmem(dev_b); | |
2051 | ||
2052 | return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start, | |
2053 | sizeof(resource_size_t)); | |
2054 | } | |
2055 | ||
8a5f50d3 DW |
2056 | static struct device **scan_labels(struct nd_region *nd_region) |
2057 | { | |
c969e24c | 2058 | int i, count = 0; |
8a5f50d3 DW |
2059 | struct device *dev, **devs = NULL; |
2060 | struct nd_label_ent *label_ent, *e; | |
c969e24c DW |
2061 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
2062 | resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1; | |
1b40e09a | 2063 | |
8a5f50d3 DW |
2064 | /* "safe" because create_namespace_pmem() might list_move() label_ent */ |
2065 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { | |
ae8219f1 | 2066 | struct nd_namespace_label *nd_label = label_ent->label; |
1b40e09a | 2067 | struct device **__devs; |
ae8219f1 | 2068 | u32 flags; |
1b40e09a | 2069 | |
ae8219f1 DW |
2070 | if (!nd_label) |
2071 | continue; | |
2072 | flags = __le32_to_cpu(nd_label->flags); | |
8a5f50d3 DW |
2073 | if (is_nd_blk(&nd_region->dev) |
2074 | == !!(flags & NSLABEL_FLAG_LOCAL)) | |
2075 | /* pass, region matches label type */; | |
1b40e09a DW |
2076 | else |
2077 | continue; | |
2078 | ||
c969e24c DW |
2079 | /* skip labels that describe extents outside of the region */ |
2080 | if (nd_label->dpa < nd_mapping->start || nd_label->dpa > map_end) | |
2081 | continue; | |
2082 | ||
8a5f50d3 DW |
2083 | i = add_namespace_resource(nd_region, nd_label, devs, count); |
2084 | if (i < 0) | |
2085 | goto err; | |
1b40e09a DW |
2086 | if (i < count) |
2087 | continue; | |
2088 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); | |
2089 | if (!__devs) | |
2090 | goto err; | |
2091 | memcpy(__devs, devs, sizeof(dev) * count); | |
2092 | kfree(devs); | |
2093 | devs = __devs; | |
2094 | ||
8a5f50d3 DW |
2095 | if (is_nd_blk(&nd_region->dev)) { |
2096 | dev = create_namespace_blk(nd_region, nd_label, count); | |
2097 | if (IS_ERR(dev)) | |
2098 | goto err; | |
2099 | devs[count++] = dev; | |
2100 | } else { | |
2101 | dev = create_namespace_pmem(nd_region, nd_label); | |
2102 | if (IS_ERR(dev)) { | |
2103 | switch (PTR_ERR(dev)) { | |
2104 | case -EAGAIN: | |
2105 | /* skip invalid labels */ | |
2106 | continue; | |
2107 | case -ENODEV: | |
2108 | /* fallthrough to seed creation */ | |
2109 | break; | |
2110 | default: | |
2111 | goto err; | |
2112 | } | |
2113 | } else | |
2114 | devs[count++] = dev; | |
8a5f50d3 | 2115 | } |
1b40e09a DW |
2116 | } |
2117 | ||
8a5f50d3 DW |
2118 | dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s\n", |
2119 | __func__, count, is_nd_blk(&nd_region->dev) | |
2120 | ? "blk" : "pmem", count == 1 ? "" : "s"); | |
1b40e09a DW |
2121 | |
2122 | if (count == 0) { | |
2123 | /* Publish a zero-sized namespace for userspace to configure. */ | |
ae8219f1 | 2124 | nd_mapping_free_labels(nd_mapping); |
1b40e09a DW |
2125 | |
2126 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); | |
2127 | if (!devs) | |
2128 | goto err; | |
8a5f50d3 DW |
2129 | if (is_nd_blk(&nd_region->dev)) { |
2130 | struct nd_namespace_blk *nsblk; | |
2131 | ||
2132 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
2133 | if (!nsblk) | |
2134 | goto err; | |
2135 | dev = &nsblk->common.dev; | |
2136 | dev->type = &namespace_blk_device_type; | |
2137 | } else { | |
2138 | struct nd_namespace_pmem *nspm; | |
2139 | ||
2140 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
2141 | if (!nspm) | |
2142 | goto err; | |
2143 | dev = &nspm->nsio.common.dev; | |
2144 | dev->type = &namespace_pmem_device_type; | |
0e3b0d12 | 2145 | nd_namespace_pmem_set_resource(nd_region, nspm, 0); |
8a5f50d3 | 2146 | } |
1b40e09a DW |
2147 | dev->parent = &nd_region->dev; |
2148 | devs[count++] = dev; | |
8a5f50d3 DW |
2149 | } else if (is_nd_pmem(&nd_region->dev)) { |
2150 | /* clean unselected labels */ | |
2151 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
0e3b0d12 DW |
2152 | struct list_head *l, *e; |
2153 | LIST_HEAD(list); | |
2154 | int j; | |
2155 | ||
8a5f50d3 DW |
2156 | nd_mapping = &nd_region->mapping[i]; |
2157 | if (list_empty(&nd_mapping->labels)) { | |
2158 | WARN_ON(1); | |
2159 | continue; | |
2160 | } | |
0e3b0d12 DW |
2161 | |
2162 | j = count; | |
2163 | list_for_each_safe(l, e, &nd_mapping->labels) { | |
2164 | if (!j--) | |
2165 | break; | |
2166 | list_move_tail(l, &list); | |
2167 | } | |
8a5f50d3 | 2168 | nd_mapping_free_labels(nd_mapping); |
0e3b0d12 | 2169 | list_splice_init(&list, &nd_mapping->labels); |
8a5f50d3 | 2170 | } |
1b40e09a DW |
2171 | } |
2172 | ||
6ff3e912 DW |
2173 | if (count > 1) |
2174 | sort(devs, count, sizeof(struct device *), cmp_dpa, NULL); | |
2175 | ||
1b40e09a DW |
2176 | return devs; |
2177 | ||
ae8219f1 | 2178 | err: |
75d29713 DC |
2179 | if (devs) { |
2180 | for (i = 0; devs[i]; i++) | |
2181 | if (is_nd_blk(&nd_region->dev)) | |
2182 | namespace_blk_release(devs[i]); | |
2183 | else | |
2184 | namespace_pmem_release(devs[i]); | |
2185 | kfree(devs); | |
2186 | } | |
1b40e09a DW |
2187 | return NULL; |
2188 | } | |
2189 | ||
8a5f50d3 | 2190 | static struct device **create_namespaces(struct nd_region *nd_region) |
ae8219f1 DW |
2191 | { |
2192 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
2193 | struct device **devs; | |
8a5f50d3 | 2194 | int i; |
ae8219f1 DW |
2195 | |
2196 | if (nd_region->ndr_mappings == 0) | |
2197 | return NULL; | |
2198 | ||
8a5f50d3 DW |
2199 | /* lock down all mappings while we scan labels */ |
2200 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2201 | nd_mapping = &nd_region->mapping[i]; | |
2202 | mutex_lock_nested(&nd_mapping->lock, i); | |
2203 | } | |
2204 | ||
2205 | devs = scan_labels(nd_region); | |
2206 | ||
2207 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2208 | int reverse = nd_region->ndr_mappings - 1 - i; | |
2209 | ||
2210 | nd_mapping = &nd_region->mapping[reverse]; | |
2211 | mutex_unlock(&nd_mapping->lock); | |
2212 | } | |
ae8219f1 DW |
2213 | |
2214 | return devs; | |
2215 | } | |
2216 | ||
bf9bccc1 DW |
2217 | static int init_active_labels(struct nd_region *nd_region) |
2218 | { | |
2219 | int i; | |
2220 | ||
2221 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
2222 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
2223 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
2224 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
ae8219f1 | 2225 | struct nd_label_ent *label_ent; |
bf9bccc1 DW |
2226 | int count, j; |
2227 | ||
2228 | /* | |
2229 | * If the dimm is disabled then prevent the region from | |
2230 | * being activated if it aliases DPA. | |
2231 | */ | |
2232 | if (!ndd) { | |
2233 | if ((nvdimm->flags & NDD_ALIASING) == 0) | |
2234 | return 0; | |
2235 | dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", | |
2236 | dev_name(&nd_mapping->nvdimm->dev)); | |
2237 | return -ENXIO; | |
2238 | } | |
2239 | nd_mapping->ndd = ndd; | |
2240 | atomic_inc(&nvdimm->busy); | |
2241 | get_ndd(ndd); | |
2242 | ||
2243 | count = nd_label_active_count(ndd); | |
2244 | dev_dbg(ndd->dev, "%s: %d\n", __func__, count); | |
2245 | if (!count) | |
2246 | continue; | |
bf9bccc1 DW |
2247 | for (j = 0; j < count; j++) { |
2248 | struct nd_namespace_label *label; | |
2249 | ||
ae8219f1 DW |
2250 | label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); |
2251 | if (!label_ent) | |
2252 | break; | |
bf9bccc1 | 2253 | label = nd_label_active(ndd, j); |
ae8219f1 DW |
2254 | label_ent->label = label; |
2255 | ||
2256 | mutex_lock(&nd_mapping->lock); | |
2257 | list_add_tail(&label_ent->list, &nd_mapping->labels); | |
2258 | mutex_unlock(&nd_mapping->lock); | |
bf9bccc1 | 2259 | } |
ae8219f1 DW |
2260 | |
2261 | if (j >= count) | |
2262 | continue; | |
2263 | ||
2264 | mutex_lock(&nd_mapping->lock); | |
2265 | nd_mapping_free_labels(nd_mapping); | |
2266 | mutex_unlock(&nd_mapping->lock); | |
2267 | return -ENOMEM; | |
bf9bccc1 DW |
2268 | } |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
3d88002e DW |
2273 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
2274 | { | |
2275 | struct device **devs = NULL; | |
bf9bccc1 | 2276 | int i, rc = 0, type; |
3d88002e DW |
2277 | |
2278 | *err = 0; | |
bf9bccc1 DW |
2279 | nvdimm_bus_lock(&nd_region->dev); |
2280 | rc = init_active_labels(nd_region); | |
2281 | if (rc) { | |
2282 | nvdimm_bus_unlock(&nd_region->dev); | |
2283 | return rc; | |
2284 | } | |
2285 | ||
2286 | type = nd_region_to_nstype(nd_region); | |
2287 | switch (type) { | |
3d88002e DW |
2288 | case ND_DEVICE_NAMESPACE_IO: |
2289 | devs = create_namespace_io(nd_region); | |
2290 | break; | |
bf9bccc1 | 2291 | case ND_DEVICE_NAMESPACE_PMEM: |
1b40e09a | 2292 | case ND_DEVICE_NAMESPACE_BLK: |
8a5f50d3 | 2293 | devs = create_namespaces(nd_region); |
1b40e09a | 2294 | break; |
3d88002e DW |
2295 | default: |
2296 | break; | |
2297 | } | |
bf9bccc1 | 2298 | nvdimm_bus_unlock(&nd_region->dev); |
3d88002e DW |
2299 | |
2300 | if (!devs) | |
2301 | return -ENODEV; | |
2302 | ||
2303 | for (i = 0; devs[i]; i++) { | |
2304 | struct device *dev = devs[i]; | |
1b40e09a | 2305 | int id; |
3d88002e | 2306 | |
1b40e09a DW |
2307 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
2308 | struct nd_namespace_blk *nsblk; | |
2309 | ||
2310 | nsblk = to_nd_namespace_blk(dev); | |
2311 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2312 | GFP_KERNEL); | |
2313 | nsblk->id = id; | |
0e3b0d12 DW |
2314 | } else if (type == ND_DEVICE_NAMESPACE_PMEM) { |
2315 | struct nd_namespace_pmem *nspm; | |
2316 | ||
2317 | nspm = to_nd_namespace_pmem(dev); | |
2318 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
2319 | GFP_KERNEL); | |
2320 | nspm->id = id; | |
1b40e09a DW |
2321 | } else |
2322 | id = i; | |
2323 | ||
2324 | if (id < 0) | |
2325 | break; | |
2326 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); | |
3d88002e DW |
2327 | dev->groups = nd_namespace_attribute_groups; |
2328 | nd_device_register(dev); | |
2329 | } | |
1b40e09a DW |
2330 | if (i) |
2331 | nd_region->ns_seed = devs[0]; | |
2332 | ||
2333 | if (devs[i]) { | |
2334 | int j; | |
2335 | ||
2336 | for (j = i; devs[j]; j++) { | |
2337 | struct device *dev = devs[j]; | |
2338 | ||
2339 | device_initialize(dev); | |
2340 | put_device(dev); | |
2341 | } | |
2342 | *err = j - i; | |
2343 | /* | |
2344 | * All of the namespaces we tried to register failed, so | |
2345 | * fail region activation. | |
2346 | */ | |
2347 | if (*err == 0) | |
2348 | rc = -ENODEV; | |
2349 | } | |
3d88002e DW |
2350 | kfree(devs); |
2351 | ||
1b40e09a DW |
2352 | if (rc == -ENODEV) |
2353 | return rc; | |
2354 | ||
3d88002e DW |
2355 | return i; |
2356 | } |