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