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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> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/nd.h> | |
bf9bccc1 | 17 | #include "nd-core.h" |
3d88002e DW |
18 | #include "nd.h" |
19 | ||
20 | static void namespace_io_release(struct device *dev) | |
21 | { | |
22 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
23 | ||
24 | kfree(nsio); | |
25 | } | |
26 | ||
bf9bccc1 DW |
27 | static void namespace_pmem_release(struct device *dev) |
28 | { | |
29 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
30 | ||
31 | kfree(nspm->alt_name); | |
32 | kfree(nspm->uuid); | |
33 | kfree(nspm); | |
34 | } | |
35 | ||
36 | static void namespace_blk_release(struct device *dev) | |
37 | { | |
1b40e09a DW |
38 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
39 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
40 | ||
41 | if (nsblk->id >= 0) | |
42 | ida_simple_remove(&nd_region->ns_ida, nsblk->id); | |
43 | kfree(nsblk->alt_name); | |
44 | kfree(nsblk->uuid); | |
45 | kfree(nsblk->res); | |
46 | kfree(nsblk); | |
bf9bccc1 DW |
47 | } |
48 | ||
3d88002e DW |
49 | static struct device_type namespace_io_device_type = { |
50 | .name = "nd_namespace_io", | |
51 | .release = namespace_io_release, | |
52 | }; | |
53 | ||
bf9bccc1 DW |
54 | static struct device_type namespace_pmem_device_type = { |
55 | .name = "nd_namespace_pmem", | |
56 | .release = namespace_pmem_release, | |
57 | }; | |
58 | ||
59 | static struct device_type namespace_blk_device_type = { | |
60 | .name = "nd_namespace_blk", | |
61 | .release = namespace_blk_release, | |
62 | }; | |
63 | ||
64 | static bool is_namespace_pmem(struct device *dev) | |
65 | { | |
66 | return dev ? dev->type == &namespace_pmem_device_type : false; | |
67 | } | |
68 | ||
69 | static bool is_namespace_blk(struct device *dev) | |
70 | { | |
71 | return dev ? dev->type == &namespace_blk_device_type : false; | |
72 | } | |
73 | ||
74 | static bool is_namespace_io(struct device *dev) | |
75 | { | |
76 | return dev ? dev->type == &namespace_io_device_type : false; | |
77 | } | |
78 | ||
5212e11f VV |
79 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
80 | char *name) | |
81 | { | |
82 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
83 | const char *suffix = ""; | |
84 | ||
85 | if (ndns->claim && is_nd_btt(ndns->claim)) | |
86 | suffix = "s"; | |
87 | ||
88 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) | |
89 | sprintf(name, "pmem%d%s", nd_region->id, suffix); | |
90 | else if (is_namespace_blk(&ndns->dev)) { | |
91 | struct nd_namespace_blk *nsblk; | |
92 | ||
93 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
94 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, suffix); | |
95 | } else { | |
96 | return NULL; | |
97 | } | |
98 | ||
99 | return name; | |
100 | } | |
101 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); | |
102 | ||
3d88002e DW |
103 | static ssize_t nstype_show(struct device *dev, |
104 | struct device_attribute *attr, char *buf) | |
105 | { | |
106 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
107 | ||
108 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); | |
109 | } | |
110 | static DEVICE_ATTR_RO(nstype); | |
111 | ||
bf9bccc1 DW |
112 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
113 | const size_t len) | |
114 | { | |
115 | char *input, *pos, *alt_name, **ns_altname; | |
116 | ssize_t rc; | |
117 | ||
118 | if (is_namespace_pmem(dev)) { | |
119 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
120 | ||
121 | ns_altname = &nspm->alt_name; | |
122 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
123 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
124 | ||
125 | ns_altname = &nsblk->alt_name; | |
bf9bccc1 DW |
126 | } else |
127 | return -ENXIO; | |
128 | ||
8c2f7e86 | 129 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
130 | return -EBUSY; |
131 | ||
132 | input = kmemdup(buf, len + 1, GFP_KERNEL); | |
133 | if (!input) | |
134 | return -ENOMEM; | |
135 | ||
136 | input[len] = '\0'; | |
137 | pos = strim(input); | |
138 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { | |
139 | rc = -EINVAL; | |
140 | goto out; | |
141 | } | |
142 | ||
143 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); | |
144 | if (!alt_name) { | |
145 | rc = -ENOMEM; | |
146 | goto out; | |
147 | } | |
148 | kfree(*ns_altname); | |
149 | *ns_altname = alt_name; | |
150 | sprintf(*ns_altname, "%s", pos); | |
151 | rc = len; | |
152 | ||
153 | out: | |
154 | kfree(input); | |
155 | return rc; | |
156 | } | |
157 | ||
1b40e09a DW |
158 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
159 | { | |
8c2f7e86 | 160 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
1b40e09a DW |
161 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
162 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
163 | struct nd_label_id label_id; | |
164 | resource_size_t size = 0; | |
165 | struct resource *res; | |
166 | ||
167 | if (!nsblk->uuid) | |
168 | return 0; | |
169 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
170 | for_each_dpa_resource(ndd, res) | |
171 | if (strcmp(res->name, label_id.id) == 0) | |
172 | size += resource_size(res); | |
173 | return size; | |
174 | } | |
175 | ||
f524bf27 DW |
176 | static int nd_namespace_label_update(struct nd_region *nd_region, |
177 | struct device *dev) | |
178 | { | |
8c2f7e86 | 179 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
f524bf27 | 180 | "namespace must be idle during label update\n"); |
8c2f7e86 | 181 | if (dev->driver || to_ndns(dev)->claim) |
f524bf27 DW |
182 | return 0; |
183 | ||
184 | /* | |
185 | * Only allow label writes that will result in a valid namespace | |
186 | * or deletion of an existing namespace. | |
187 | */ | |
188 | if (is_namespace_pmem(dev)) { | |
189 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0ba1c634 | 190 | resource_size_t size = resource_size(&nspm->nsio.res); |
f524bf27 DW |
191 | |
192 | if (size == 0 && nspm->uuid) | |
193 | /* delete allocation */; | |
194 | else if (!nspm->uuid) | |
195 | return 0; | |
196 | ||
197 | return nd_pmem_namespace_label_update(nd_region, nspm, size); | |
198 | } else if (is_namespace_blk(dev)) { | |
0ba1c634 DW |
199 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
200 | resource_size_t size = nd_namespace_blk_size(nsblk); | |
201 | ||
202 | if (size == 0 && nsblk->uuid) | |
203 | /* delete allocation */; | |
204 | else if (!nsblk->uuid || !nsblk->lbasize) | |
205 | return 0; | |
206 | ||
207 | return nd_blk_namespace_label_update(nd_region, nsblk, size); | |
f524bf27 DW |
208 | } else |
209 | return -ENXIO; | |
210 | } | |
211 | ||
bf9bccc1 DW |
212 | static ssize_t alt_name_store(struct device *dev, |
213 | struct device_attribute *attr, const char *buf, size_t len) | |
214 | { | |
f524bf27 | 215 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
216 | ssize_t rc; |
217 | ||
218 | device_lock(dev); | |
219 | nvdimm_bus_lock(dev); | |
220 | wait_nvdimm_bus_probe_idle(dev); | |
221 | rc = __alt_name_store(dev, buf, len); | |
f524bf27 DW |
222 | if (rc >= 0) |
223 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
224 | dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc); |
225 | nvdimm_bus_unlock(dev); | |
226 | device_unlock(dev); | |
227 | ||
f524bf27 | 228 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
229 | } |
230 | ||
231 | static ssize_t alt_name_show(struct device *dev, | |
232 | struct device_attribute *attr, char *buf) | |
233 | { | |
234 | char *ns_altname; | |
235 | ||
236 | if (is_namespace_pmem(dev)) { | |
237 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
238 | ||
239 | ns_altname = nspm->alt_name; | |
240 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
241 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
242 | ||
243 | ns_altname = nsblk->alt_name; | |
bf9bccc1 DW |
244 | } else |
245 | return -ENXIO; | |
246 | ||
247 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); | |
248 | } | |
249 | static DEVICE_ATTR_RW(alt_name); | |
250 | ||
251 | static int scan_free(struct nd_region *nd_region, | |
252 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
253 | resource_size_t n) | |
254 | { | |
255 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
256 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
257 | int rc = 0; | |
258 | ||
259 | while (n) { | |
260 | struct resource *res, *last; | |
261 | resource_size_t new_start; | |
262 | ||
263 | last = NULL; | |
264 | for_each_dpa_resource(ndd, res) | |
265 | if (strcmp(res->name, label_id->id) == 0) | |
266 | last = res; | |
267 | res = last; | |
268 | if (!res) | |
269 | return 0; | |
270 | ||
271 | if (n >= resource_size(res)) { | |
272 | n -= resource_size(res); | |
273 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); | |
274 | nvdimm_free_dpa(ndd, res); | |
275 | /* retry with last resource deleted */ | |
276 | continue; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Keep BLK allocations relegated to high DPA as much as | |
281 | * possible | |
282 | */ | |
283 | if (is_blk) | |
284 | new_start = res->start + n; | |
285 | else | |
286 | new_start = res->start; | |
287 | ||
288 | rc = adjust_resource(res, new_start, resource_size(res) - n); | |
1b40e09a DW |
289 | if (rc == 0) |
290 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
291 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
292 | break; | |
293 | } | |
294 | ||
295 | return rc; | |
296 | } | |
297 | ||
298 | /** | |
299 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id | |
300 | * @nd_region: the set of dimms to reclaim @n bytes from | |
301 | * @label_id: unique identifier for the namespace consuming this dpa range | |
302 | * @n: number of bytes per-dimm to release | |
303 | * | |
304 | * Assumes resources are ordered. Starting from the end try to | |
305 | * adjust_resource() the allocation to @n, but if @n is larger than the | |
306 | * allocation delete it and find the 'new' last allocation in the label | |
307 | * set. | |
308 | */ | |
309 | static int shrink_dpa_allocation(struct nd_region *nd_region, | |
310 | struct nd_label_id *label_id, resource_size_t n) | |
311 | { | |
312 | int i; | |
313 | ||
314 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
315 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
316 | int rc; | |
317 | ||
318 | rc = scan_free(nd_region, nd_mapping, label_id, n); | |
319 | if (rc) | |
320 | return rc; | |
321 | } | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, | |
327 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, | |
328 | resource_size_t n) | |
329 | { | |
330 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
331 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
332 | resource_size_t first_dpa; | |
333 | struct resource *res; | |
334 | int rc = 0; | |
335 | ||
336 | /* allocate blk from highest dpa first */ | |
337 | if (is_blk) | |
338 | first_dpa = nd_mapping->start + nd_mapping->size - n; | |
339 | else | |
340 | first_dpa = nd_mapping->start; | |
341 | ||
342 | /* first resource allocation for this label-id or dimm */ | |
343 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); | |
344 | if (!res) | |
345 | rc = -EBUSY; | |
346 | ||
347 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); | |
348 | return rc ? n : 0; | |
349 | } | |
350 | ||
1b40e09a DW |
351 | static bool space_valid(bool is_pmem, bool is_reserve, |
352 | struct nd_label_id *label_id, struct resource *res) | |
bf9bccc1 DW |
353 | { |
354 | /* | |
355 | * For BLK-space any space is valid, for PMEM-space, it must be | |
1b40e09a DW |
356 | * contiguous with an existing allocation unless we are |
357 | * reserving pmem. | |
bf9bccc1 | 358 | */ |
1b40e09a | 359 | if (is_reserve || !is_pmem) |
bf9bccc1 DW |
360 | return true; |
361 | if (!res || strcmp(res->name, label_id->id) == 0) | |
362 | return true; | |
363 | return false; | |
364 | } | |
365 | ||
366 | enum alloc_loc { | |
367 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, | |
368 | }; | |
369 | ||
370 | static resource_size_t scan_allocate(struct nd_region *nd_region, | |
371 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
372 | resource_size_t n) | |
373 | { | |
374 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; | |
1b40e09a | 375 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
bf9bccc1 DW |
376 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
377 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
378 | const resource_size_t to_allocate = n; | |
379 | struct resource *res; | |
380 | int first; | |
381 | ||
382 | retry: | |
383 | first = 0; | |
384 | for_each_dpa_resource(ndd, res) { | |
385 | resource_size_t allocate, available = 0, free_start, free_end; | |
386 | struct resource *next = res->sibling, *new_res = NULL; | |
387 | enum alloc_loc loc = ALLOC_ERR; | |
388 | const char *action; | |
389 | int rc = 0; | |
390 | ||
391 | /* ignore resources outside this nd_mapping */ | |
392 | if (res->start > mapping_end) | |
393 | continue; | |
394 | if (res->end < nd_mapping->start) | |
395 | continue; | |
396 | ||
397 | /* space at the beginning of the mapping */ | |
398 | if (!first++ && res->start > nd_mapping->start) { | |
399 | free_start = nd_mapping->start; | |
400 | available = res->start - free_start; | |
1b40e09a | 401 | if (space_valid(is_pmem, is_reserve, label_id, NULL)) |
bf9bccc1 DW |
402 | loc = ALLOC_BEFORE; |
403 | } | |
404 | ||
405 | /* space between allocations */ | |
406 | if (!loc && next) { | |
407 | free_start = res->start + resource_size(res); | |
408 | free_end = min(mapping_end, next->start - 1); | |
1b40e09a | 409 | if (space_valid(is_pmem, is_reserve, label_id, res) |
bf9bccc1 DW |
410 | && free_start < free_end) { |
411 | available = free_end + 1 - free_start; | |
412 | loc = ALLOC_MID; | |
413 | } | |
414 | } | |
415 | ||
416 | /* space at the end of the mapping */ | |
417 | if (!loc && !next) { | |
418 | free_start = res->start + resource_size(res); | |
419 | free_end = mapping_end; | |
1b40e09a | 420 | if (space_valid(is_pmem, is_reserve, label_id, res) |
bf9bccc1 DW |
421 | && free_start < free_end) { |
422 | available = free_end + 1 - free_start; | |
423 | loc = ALLOC_AFTER; | |
424 | } | |
425 | } | |
426 | ||
427 | if (!loc || !available) | |
428 | continue; | |
429 | allocate = min(available, n); | |
430 | switch (loc) { | |
431 | case ALLOC_BEFORE: | |
432 | if (strcmp(res->name, label_id->id) == 0) { | |
433 | /* adjust current resource up */ | |
1b40e09a | 434 | if (is_pmem && !is_reserve) |
bf9bccc1 DW |
435 | return n; |
436 | rc = adjust_resource(res, res->start - allocate, | |
437 | resource_size(res) + allocate); | |
438 | action = "cur grow up"; | |
439 | } else | |
440 | action = "allocate"; | |
441 | break; | |
442 | case ALLOC_MID: | |
443 | if (strcmp(next->name, label_id->id) == 0) { | |
444 | /* adjust next resource up */ | |
1b40e09a | 445 | if (is_pmem && !is_reserve) |
bf9bccc1 DW |
446 | return n; |
447 | rc = adjust_resource(next, next->start | |
448 | - allocate, resource_size(next) | |
449 | + allocate); | |
450 | new_res = next; | |
451 | action = "next grow up"; | |
452 | } else if (strcmp(res->name, label_id->id) == 0) { | |
453 | action = "grow down"; | |
454 | } else | |
455 | action = "allocate"; | |
456 | break; | |
457 | case ALLOC_AFTER: | |
458 | if (strcmp(res->name, label_id->id) == 0) | |
459 | action = "grow down"; | |
460 | else | |
461 | action = "allocate"; | |
462 | break; | |
463 | default: | |
464 | return n; | |
465 | } | |
466 | ||
467 | if (strcmp(action, "allocate") == 0) { | |
468 | /* BLK allocate bottom up */ | |
469 | if (!is_pmem) | |
470 | free_start += available - allocate; | |
1b40e09a | 471 | else if (!is_reserve && free_start != nd_mapping->start) |
bf9bccc1 DW |
472 | return n; |
473 | ||
474 | new_res = nvdimm_allocate_dpa(ndd, label_id, | |
475 | free_start, allocate); | |
476 | if (!new_res) | |
477 | rc = -EBUSY; | |
478 | } else if (strcmp(action, "grow down") == 0) { | |
479 | /* adjust current resource down */ | |
480 | rc = adjust_resource(res, res->start, resource_size(res) | |
481 | + allocate); | |
1b40e09a DW |
482 | if (rc == 0) |
483 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
484 | } |
485 | ||
486 | if (!new_res) | |
487 | new_res = res; | |
488 | ||
489 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", | |
490 | action, loc, rc); | |
491 | ||
492 | if (rc) | |
493 | return n; | |
494 | ||
495 | n -= allocate; | |
496 | if (n) { | |
497 | /* | |
498 | * Retry scan with newly inserted resources. | |
499 | * For example, if we did an ALLOC_BEFORE | |
500 | * insertion there may also have been space | |
501 | * available for an ALLOC_AFTER insertion, so we | |
502 | * need to check this same resource again | |
503 | */ | |
504 | goto retry; | |
505 | } else | |
506 | return 0; | |
507 | } | |
508 | ||
1b40e09a DW |
509 | /* |
510 | * If we allocated nothing in the BLK case it may be because we are in | |
511 | * an initial "pmem-reserve pass". Only do an initial BLK allocation | |
512 | * when none of the DPA space is reserved. | |
513 | */ | |
514 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) | |
bf9bccc1 DW |
515 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
516 | return n; | |
517 | } | |
518 | ||
1b40e09a DW |
519 | static int merge_dpa(struct nd_region *nd_region, |
520 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) | |
521 | { | |
522 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
523 | struct resource *res; | |
524 | ||
525 | if (strncmp("pmem", label_id->id, 4) == 0) | |
526 | return 0; | |
527 | retry: | |
528 | for_each_dpa_resource(ndd, res) { | |
529 | int rc; | |
530 | struct resource *next = res->sibling; | |
531 | resource_size_t end = res->start + resource_size(res); | |
532 | ||
533 | if (!next || strcmp(res->name, label_id->id) != 0 | |
534 | || strcmp(next->name, label_id->id) != 0 | |
535 | || end != next->start) | |
536 | continue; | |
537 | end += resource_size(next); | |
538 | nvdimm_free_dpa(ndd, next); | |
539 | rc = adjust_resource(res, res->start, end - res->start); | |
540 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); | |
541 | if (rc) | |
542 | return rc; | |
543 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
544 | goto retry; | |
545 | } | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static int __reserve_free_pmem(struct device *dev, void *data) | |
551 | { | |
552 | struct nvdimm *nvdimm = data; | |
553 | struct nd_region *nd_region; | |
554 | struct nd_label_id label_id; | |
555 | int i; | |
556 | ||
557 | if (!is_nd_pmem(dev)) | |
558 | return 0; | |
559 | ||
560 | nd_region = to_nd_region(dev); | |
561 | if (nd_region->ndr_mappings == 0) | |
562 | return 0; | |
563 | ||
564 | memset(&label_id, 0, sizeof(label_id)); | |
565 | strcat(label_id.id, "pmem-reserve"); | |
566 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
567 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
568 | resource_size_t n, rem = 0; | |
569 | ||
570 | if (nd_mapping->nvdimm != nvdimm) | |
571 | continue; | |
572 | ||
573 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); | |
574 | if (n == 0) | |
575 | return 0; | |
576 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); | |
577 | dev_WARN_ONCE(&nd_region->dev, rem, | |
578 | "pmem reserve underrun: %#llx of %#llx bytes\n", | |
579 | (unsigned long long) n - rem, | |
580 | (unsigned long long) n); | |
581 | return rem ? -ENXIO : 0; | |
582 | } | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static void release_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
588 | struct nd_mapping *nd_mapping) | |
589 | { | |
590 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
591 | struct resource *res, *_res; | |
592 | ||
593 | for_each_dpa_resource_safe(ndd, res, _res) | |
594 | if (strcmp(res->name, "pmem-reserve") == 0) | |
595 | nvdimm_free_dpa(ndd, res); | |
596 | } | |
597 | ||
598 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
599 | struct nd_mapping *nd_mapping) | |
600 | { | |
601 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
602 | int rc; | |
603 | ||
604 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, | |
605 | __reserve_free_pmem); | |
606 | if (rc) | |
607 | release_free_pmem(nvdimm_bus, nd_mapping); | |
608 | return rc; | |
609 | } | |
610 | ||
bf9bccc1 DW |
611 | /** |
612 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id | |
613 | * @nd_region: the set of dimms to allocate @n more bytes from | |
614 | * @label_id: unique identifier for the namespace consuming this dpa range | |
615 | * @n: number of bytes per-dimm to add to the existing allocation | |
616 | * | |
617 | * Assumes resources are ordered. For BLK regions, first consume | |
618 | * BLK-only available DPA free space, then consume PMEM-aliased DPA | |
619 | * space starting at the highest DPA. For PMEM regions start | |
620 | * allocations from the start of an interleave set and end at the first | |
621 | * BLK allocation or the end of the interleave set, whichever comes | |
622 | * first. | |
623 | */ | |
624 | static int grow_dpa_allocation(struct nd_region *nd_region, | |
625 | struct nd_label_id *label_id, resource_size_t n) | |
626 | { | |
1b40e09a DW |
627 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
628 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
bf9bccc1 DW |
629 | int i; |
630 | ||
631 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
632 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1b40e09a DW |
633 | resource_size_t rem = n; |
634 | int rc, j; | |
635 | ||
636 | /* | |
637 | * In the BLK case try once with all unallocated PMEM | |
638 | * reserved, and once without | |
639 | */ | |
640 | for (j = is_pmem; j < 2; j++) { | |
641 | bool blk_only = j == 0; | |
642 | ||
643 | if (blk_only) { | |
644 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); | |
645 | if (rc) | |
646 | return rc; | |
647 | } | |
648 | rem = scan_allocate(nd_region, nd_mapping, | |
649 | label_id, rem); | |
650 | if (blk_only) | |
651 | release_free_pmem(nvdimm_bus, nd_mapping); | |
bf9bccc1 | 652 | |
1b40e09a DW |
653 | /* try again and allow encroachments into PMEM */ |
654 | if (rem == 0) | |
655 | break; | |
656 | } | |
657 | ||
658 | dev_WARN_ONCE(&nd_region->dev, rem, | |
659 | "allocation underrun: %#llx of %#llx bytes\n", | |
660 | (unsigned long long) n - rem, | |
661 | (unsigned long long) n); | |
662 | if (rem) | |
663 | return -ENXIO; | |
664 | ||
665 | rc = merge_dpa(nd_region, nd_mapping, label_id); | |
bf9bccc1 DW |
666 | if (rc) |
667 | return rc; | |
668 | } | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | static void nd_namespace_pmem_set_size(struct nd_region *nd_region, | |
674 | struct nd_namespace_pmem *nspm, resource_size_t size) | |
675 | { | |
676 | struct resource *res = &nspm->nsio.res; | |
677 | ||
678 | res->start = nd_region->ndr_start; | |
679 | res->end = nd_region->ndr_start + size - 1; | |
680 | } | |
681 | ||
682 | static ssize_t __size_store(struct device *dev, unsigned long long val) | |
683 | { | |
684 | resource_size_t allocated = 0, available = 0; | |
685 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
686 | struct nd_mapping *nd_mapping; | |
687 | struct nvdimm_drvdata *ndd; | |
688 | struct nd_label_id label_id; | |
689 | u32 flags = 0, remainder; | |
690 | u8 *uuid = NULL; | |
691 | int rc, i; | |
692 | ||
8c2f7e86 | 693 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
694 | return -EBUSY; |
695 | ||
696 | if (is_namespace_pmem(dev)) { | |
697 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
698 | ||
699 | uuid = nspm->uuid; | |
700 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
701 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
702 | ||
703 | uuid = nsblk->uuid; | |
704 | flags = NSLABEL_FLAG_LOCAL; | |
bf9bccc1 DW |
705 | } |
706 | ||
707 | /* | |
708 | * We need a uuid for the allocation-label and dimm(s) on which | |
709 | * to store the label. | |
710 | */ | |
711 | if (!uuid || nd_region->ndr_mappings == 0) | |
712 | return -ENXIO; | |
713 | ||
714 | div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); | |
715 | if (remainder) { | |
716 | dev_dbg(dev, "%llu is not %dK aligned\n", val, | |
717 | (SZ_4K * nd_region->ndr_mappings) / SZ_1K); | |
718 | return -EINVAL; | |
719 | } | |
720 | ||
721 | nd_label_gen_id(&label_id, uuid, flags); | |
722 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
723 | nd_mapping = &nd_region->mapping[i]; | |
724 | ndd = to_ndd(nd_mapping); | |
725 | ||
726 | /* | |
727 | * All dimms in an interleave set, or the base dimm for a blk | |
728 | * region, need to be enabled for the size to be changed. | |
729 | */ | |
730 | if (!ndd) | |
731 | return -ENXIO; | |
732 | ||
733 | allocated += nvdimm_allocated_dpa(ndd, &label_id); | |
734 | } | |
735 | available = nd_region_available_dpa(nd_region); | |
736 | ||
737 | if (val > available + allocated) | |
738 | return -ENOSPC; | |
739 | ||
740 | if (val == allocated) | |
741 | return 0; | |
742 | ||
743 | val = div_u64(val, nd_region->ndr_mappings); | |
744 | allocated = div_u64(allocated, nd_region->ndr_mappings); | |
745 | if (val < allocated) | |
746 | rc = shrink_dpa_allocation(nd_region, &label_id, | |
747 | allocated - val); | |
748 | else | |
749 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); | |
750 | ||
751 | if (rc) | |
752 | return rc; | |
753 | ||
754 | if (is_namespace_pmem(dev)) { | |
755 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
756 | ||
757 | nd_namespace_pmem_set_size(nd_region, nspm, | |
758 | val * nd_region->ndr_mappings); | |
1b40e09a | 759 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 DW |
760 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
761 | ||
1b40e09a DW |
762 | /* |
763 | * Try to delete the namespace if we deleted all of its | |
8c2f7e86 DW |
764 | * allocation, this is not the seed device for the |
765 | * region, and it is not actively claimed by a btt | |
766 | * instance. | |
1b40e09a | 767 | */ |
8c2f7e86 DW |
768 | if (val == 0 && nd_region->ns_seed != dev |
769 | && !nsblk->common.claim) | |
1b40e09a | 770 | nd_device_unregister(dev, ND_ASYNC); |
bf9bccc1 DW |
771 | } |
772 | ||
773 | return rc; | |
774 | } | |
775 | ||
776 | static ssize_t size_store(struct device *dev, | |
777 | struct device_attribute *attr, const char *buf, size_t len) | |
778 | { | |
f524bf27 | 779 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
780 | unsigned long long val; |
781 | u8 **uuid = NULL; | |
782 | int rc; | |
783 | ||
784 | rc = kstrtoull(buf, 0, &val); | |
785 | if (rc) | |
786 | return rc; | |
787 | ||
788 | device_lock(dev); | |
789 | nvdimm_bus_lock(dev); | |
790 | wait_nvdimm_bus_probe_idle(dev); | |
791 | rc = __size_store(dev, val); | |
f524bf27 DW |
792 | if (rc >= 0) |
793 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
794 | |
795 | if (is_namespace_pmem(dev)) { | |
796 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
797 | ||
798 | uuid = &nspm->uuid; | |
799 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
800 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
801 | ||
802 | uuid = &nsblk->uuid; | |
bf9bccc1 DW |
803 | } |
804 | ||
805 | if (rc == 0 && val == 0 && uuid) { | |
806 | /* setting size zero == 'delete namespace' */ | |
807 | kfree(*uuid); | |
808 | *uuid = NULL; | |
809 | } | |
810 | ||
811 | dev_dbg(dev, "%s: %llx %s (%d)\n", __func__, val, rc < 0 | |
812 | ? "fail" : "success", rc); | |
813 | ||
814 | nvdimm_bus_unlock(dev); | |
815 | device_unlock(dev); | |
816 | ||
f524bf27 | 817 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
818 | } |
819 | ||
8c2f7e86 | 820 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc1 | 821 | { |
8c2f7e86 | 822 | struct device *dev = &ndns->dev; |
1b40e09a | 823 | |
bf9bccc1 DW |
824 | if (is_namespace_pmem(dev)) { |
825 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
826 | ||
8c2f7e86 | 827 | return resource_size(&nspm->nsio.res); |
bf9bccc1 | 828 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 | 829 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc1 DW |
830 | } else if (is_namespace_io(dev)) { |
831 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
832 | ||
8c2f7e86 DW |
833 | return resource_size(&nsio->res); |
834 | } else | |
835 | WARN_ONCE(1, "unknown namespace type\n"); | |
836 | return 0; | |
837 | } | |
838 | ||
839 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) | |
840 | { | |
841 | resource_size_t size; | |
1b40e09a | 842 | |
8c2f7e86 DW |
843 | nvdimm_bus_lock(&ndns->dev); |
844 | size = __nvdimm_namespace_capacity(ndns); | |
845 | nvdimm_bus_unlock(&ndns->dev); | |
846 | ||
847 | return size; | |
848 | } | |
849 | EXPORT_SYMBOL(nvdimm_namespace_capacity); | |
850 | ||
851 | static ssize_t size_show(struct device *dev, | |
852 | struct device_attribute *attr, char *buf) | |
853 | { | |
854 | return sprintf(buf, "%llu\n", (unsigned long long) | |
855 | nvdimm_namespace_capacity(to_ndns(dev))); | |
bf9bccc1 DW |
856 | } |
857 | static DEVICE_ATTR(size, S_IRUGO, size_show, size_store); | |
858 | ||
859 | static ssize_t uuid_show(struct device *dev, | |
860 | struct device_attribute *attr, char *buf) | |
861 | { | |
862 | u8 *uuid; | |
863 | ||
864 | if (is_namespace_pmem(dev)) { | |
865 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
866 | ||
867 | uuid = nspm->uuid; | |
868 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
869 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
870 | ||
871 | uuid = nsblk->uuid; | |
bf9bccc1 DW |
872 | } else |
873 | return -ENXIO; | |
874 | ||
875 | if (uuid) | |
876 | return sprintf(buf, "%pUb\n", uuid); | |
877 | return sprintf(buf, "\n"); | |
878 | } | |
879 | ||
880 | /** | |
881 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" | |
882 | * @nd_region: parent region so we can updates all dimms in the set | |
883 | * @dev: namespace type for generating label_id | |
884 | * @new_uuid: incoming uuid | |
885 | * @old_uuid: reference to the uuid storage location in the namespace object | |
886 | */ | |
887 | static int namespace_update_uuid(struct nd_region *nd_region, | |
888 | struct device *dev, u8 *new_uuid, u8 **old_uuid) | |
889 | { | |
890 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; | |
891 | struct nd_label_id old_label_id; | |
892 | struct nd_label_id new_label_id; | |
f524bf27 | 893 | int i; |
bf9bccc1 | 894 | |
f524bf27 DW |
895 | if (!nd_is_uuid_unique(dev, new_uuid)) |
896 | return -EINVAL; | |
bf9bccc1 DW |
897 | |
898 | if (*old_uuid == NULL) | |
899 | goto out; | |
900 | ||
f524bf27 DW |
901 | /* |
902 | * If we've already written a label with this uuid, then it's | |
903 | * too late to rename because we can't reliably update the uuid | |
904 | * without losing the old namespace. Userspace must delete this | |
905 | * namespace to abandon the old uuid. | |
906 | */ | |
907 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
908 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
909 | ||
910 | /* | |
911 | * This check by itself is sufficient because old_uuid | |
912 | * would be NULL above if this uuid did not exist in the | |
913 | * currently written set. | |
914 | * | |
915 | * FIXME: can we delete uuid with zero dpa allocated? | |
916 | */ | |
917 | if (nd_mapping->labels) | |
918 | return -EBUSY; | |
919 | } | |
920 | ||
bf9bccc1 DW |
921 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
922 | nd_label_gen_id(&new_label_id, new_uuid, flags); | |
923 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
924 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
925 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
926 | struct resource *res; | |
927 | ||
928 | for_each_dpa_resource(ndd, res) | |
929 | if (strcmp(res->name, old_label_id.id) == 0) | |
930 | sprintf((void *) res->name, "%s", | |
931 | new_label_id.id); | |
932 | } | |
933 | kfree(*old_uuid); | |
934 | out: | |
935 | *old_uuid = new_uuid; | |
936 | return 0; | |
937 | } | |
938 | ||
939 | static ssize_t uuid_store(struct device *dev, | |
940 | struct device_attribute *attr, const char *buf, size_t len) | |
941 | { | |
942 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
943 | u8 *uuid = NULL; | |
8c2f7e86 | 944 | ssize_t rc = 0; |
bf9bccc1 | 945 | u8 **ns_uuid; |
bf9bccc1 DW |
946 | |
947 | if (is_namespace_pmem(dev)) { | |
948 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
949 | ||
950 | ns_uuid = &nspm->uuid; | |
951 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
952 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
953 | ||
954 | ns_uuid = &nsblk->uuid; | |
bf9bccc1 DW |
955 | } else |
956 | return -ENXIO; | |
957 | ||
958 | device_lock(dev); | |
959 | nvdimm_bus_lock(dev); | |
960 | wait_nvdimm_bus_probe_idle(dev); | |
8c2f7e86 DW |
961 | if (to_ndns(dev)->claim) |
962 | rc = -EBUSY; | |
963 | if (rc >= 0) | |
964 | rc = nd_uuid_store(dev, &uuid, buf, len); | |
bf9bccc1 DW |
965 | if (rc >= 0) |
966 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); | |
f524bf27 DW |
967 | if (rc >= 0) |
968 | rc = nd_namespace_label_update(nd_region, dev); | |
969 | else | |
970 | kfree(uuid); | |
bf9bccc1 DW |
971 | dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__, |
972 | rc, buf, buf[len - 1] == '\n' ? "" : "\n"); | |
973 | nvdimm_bus_unlock(dev); | |
974 | device_unlock(dev); | |
975 | ||
f524bf27 | 976 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
977 | } |
978 | static DEVICE_ATTR_RW(uuid); | |
979 | ||
980 | static ssize_t resource_show(struct device *dev, | |
981 | struct device_attribute *attr, char *buf) | |
982 | { | |
983 | struct resource *res; | |
984 | ||
985 | if (is_namespace_pmem(dev)) { | |
986 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
987 | ||
988 | res = &nspm->nsio.res; | |
989 | } else if (is_namespace_io(dev)) { | |
990 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
991 | ||
992 | res = &nsio->res; | |
993 | } else | |
994 | return -ENXIO; | |
995 | ||
996 | /* no address to convey if the namespace has no allocation */ | |
997 | if (resource_size(res) == 0) | |
998 | return -ENXIO; | |
999 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); | |
1000 | } | |
1001 | static DEVICE_ATTR_RO(resource); | |
1002 | ||
1b40e09a DW |
1003 | static const unsigned long ns_lbasize_supported[] = { 512, 0 }; |
1004 | ||
1005 | static ssize_t sector_size_show(struct device *dev, | |
1006 | struct device_attribute *attr, char *buf) | |
1007 | { | |
1008 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1009 | ||
1010 | if (!is_namespace_blk(dev)) | |
1011 | return -ENXIO; | |
1012 | ||
1013 | return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf); | |
1014 | } | |
1015 | ||
1016 | static ssize_t sector_size_store(struct device *dev, | |
1017 | struct device_attribute *attr, const char *buf, size_t len) | |
1018 | { | |
1019 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
f524bf27 | 1020 | struct nd_region *nd_region = to_nd_region(dev->parent); |
8c2f7e86 | 1021 | ssize_t rc = 0; |
1b40e09a DW |
1022 | |
1023 | if (!is_namespace_blk(dev)) | |
1024 | return -ENXIO; | |
1025 | ||
1026 | device_lock(dev); | |
1027 | nvdimm_bus_lock(dev); | |
8c2f7e86 DW |
1028 | if (to_ndns(dev)->claim) |
1029 | rc = -EBUSY; | |
1030 | if (rc >= 0) | |
1031 | rc = nd_sector_size_store(dev, buf, &nsblk->lbasize, | |
1032 | ns_lbasize_supported); | |
f524bf27 DW |
1033 | if (rc >= 0) |
1034 | rc = nd_namespace_label_update(nd_region, dev); | |
1035 | dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__, | |
1036 | rc, rc < 0 ? "tried" : "wrote", buf, | |
1037 | buf[len - 1] == '\n' ? "" : "\n"); | |
1b40e09a DW |
1038 | nvdimm_bus_unlock(dev); |
1039 | device_unlock(dev); | |
1040 | ||
1041 | return rc ? rc : len; | |
1042 | } | |
1043 | static DEVICE_ATTR_RW(sector_size); | |
1044 | ||
0ba1c634 DW |
1045 | static ssize_t dpa_extents_show(struct device *dev, |
1046 | struct device_attribute *attr, char *buf) | |
1047 | { | |
1048 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1049 | struct nd_label_id label_id; | |
1050 | int count = 0, i; | |
1051 | u8 *uuid = NULL; | |
1052 | u32 flags = 0; | |
1053 | ||
1054 | nvdimm_bus_lock(dev); | |
1055 | if (is_namespace_pmem(dev)) { | |
1056 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1057 | ||
1058 | uuid = nspm->uuid; | |
1059 | flags = 0; | |
1060 | } else if (is_namespace_blk(dev)) { | |
1061 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1062 | ||
1063 | uuid = nsblk->uuid; | |
1064 | flags = NSLABEL_FLAG_LOCAL; | |
1065 | } | |
1066 | ||
1067 | if (!uuid) | |
1068 | goto out; | |
1069 | ||
1070 | nd_label_gen_id(&label_id, uuid, flags); | |
1071 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1072 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1073 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1074 | struct resource *res; | |
1075 | ||
1076 | for_each_dpa_resource(ndd, res) | |
1077 | if (strcmp(res->name, label_id.id) == 0) | |
1078 | count++; | |
1079 | } | |
1080 | out: | |
1081 | nvdimm_bus_unlock(dev); | |
1082 | ||
1083 | return sprintf(buf, "%d\n", count); | |
1084 | } | |
1085 | static DEVICE_ATTR_RO(dpa_extents); | |
1086 | ||
8c2f7e86 DW |
1087 | static ssize_t holder_show(struct device *dev, |
1088 | struct device_attribute *attr, char *buf) | |
1089 | { | |
1090 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1091 | ssize_t rc; | |
1092 | ||
1093 | device_lock(dev); | |
1094 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); | |
1095 | device_unlock(dev); | |
1096 | ||
1097 | return rc; | |
1098 | } | |
1099 | static DEVICE_ATTR_RO(holder); | |
1100 | ||
1101 | static ssize_t force_raw_store(struct device *dev, | |
1102 | struct device_attribute *attr, const char *buf, size_t len) | |
1103 | { | |
1104 | bool force_raw; | |
1105 | int rc = strtobool(buf, &force_raw); | |
1106 | ||
1107 | if (rc) | |
1108 | return rc; | |
1109 | ||
1110 | to_ndns(dev)->force_raw = force_raw; | |
1111 | return len; | |
1112 | } | |
1113 | ||
1114 | static ssize_t force_raw_show(struct device *dev, | |
1115 | struct device_attribute *attr, char *buf) | |
1116 | { | |
1117 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); | |
1118 | } | |
1119 | static DEVICE_ATTR_RW(force_raw); | |
1120 | ||
3d88002e DW |
1121 | static struct attribute *nd_namespace_attributes[] = { |
1122 | &dev_attr_nstype.attr, | |
bf9bccc1 DW |
1123 | &dev_attr_size.attr, |
1124 | &dev_attr_uuid.attr, | |
8c2f7e86 | 1125 | &dev_attr_holder.attr, |
bf9bccc1 DW |
1126 | &dev_attr_resource.attr, |
1127 | &dev_attr_alt_name.attr, | |
8c2f7e86 | 1128 | &dev_attr_force_raw.attr, |
1b40e09a | 1129 | &dev_attr_sector_size.attr, |
0ba1c634 | 1130 | &dev_attr_dpa_extents.attr, |
3d88002e DW |
1131 | NULL, |
1132 | }; | |
1133 | ||
bf9bccc1 DW |
1134 | static umode_t namespace_visible(struct kobject *kobj, |
1135 | struct attribute *a, int n) | |
1136 | { | |
1137 | struct device *dev = container_of(kobj, struct device, kobj); | |
1138 | ||
1139 | if (a == &dev_attr_resource.attr) { | |
1140 | if (is_namespace_blk(dev)) | |
1141 | return 0; | |
1142 | return a->mode; | |
1143 | } | |
1144 | ||
1145 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { | |
1146 | if (a == &dev_attr_size.attr) | |
1147 | return S_IWUSR | S_IRUGO; | |
1b40e09a DW |
1148 | |
1149 | if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr) | |
1150 | return 0; | |
1151 | ||
bf9bccc1 DW |
1152 | return a->mode; |
1153 | } | |
1154 | ||
8c2f7e86 DW |
1155 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
1156 | || a == &dev_attr_holder.attr | |
1157 | || a == &dev_attr_force_raw.attr) | |
bf9bccc1 DW |
1158 | return a->mode; |
1159 | ||
1160 | return 0; | |
1161 | } | |
1162 | ||
3d88002e DW |
1163 | static struct attribute_group nd_namespace_attribute_group = { |
1164 | .attrs = nd_namespace_attributes, | |
bf9bccc1 | 1165 | .is_visible = namespace_visible, |
3d88002e DW |
1166 | }; |
1167 | ||
1168 | static const struct attribute_group *nd_namespace_attribute_groups[] = { | |
1169 | &nd_device_attribute_group, | |
1170 | &nd_namespace_attribute_group, | |
1171 | NULL, | |
1172 | }; | |
1173 | ||
8c2f7e86 DW |
1174 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
1175 | { | |
1176 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; | |
1177 | struct nd_namespace_common *ndns; | |
1178 | resource_size_t size; | |
1179 | ||
1180 | if (nd_btt) { | |
1181 | ndns = nd_btt->ndns; | |
1182 | if (!ndns) | |
1183 | return ERR_PTR(-ENODEV); | |
1184 | ||
1185 | /* | |
1186 | * Flush any in-progess probes / removals in the driver | |
1187 | * for the raw personality of this namespace. | |
1188 | */ | |
1189 | device_lock(&ndns->dev); | |
1190 | device_unlock(&ndns->dev); | |
1191 | if (ndns->dev.driver) { | |
1192 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", | |
1193 | dev_name(&nd_btt->dev)); | |
1194 | return ERR_PTR(-EBUSY); | |
1195 | } | |
1196 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != &nd_btt->dev, | |
1197 | "host (%s) vs claim (%s) mismatch\n", | |
1198 | dev_name(&nd_btt->dev), | |
1199 | dev_name(ndns->claim))) | |
1200 | return ERR_PTR(-ENXIO); | |
1201 | } else { | |
1202 | ndns = to_ndns(dev); | |
1203 | if (ndns->claim) { | |
1204 | dev_dbg(dev, "claimed by %s, failing probe\n", | |
1205 | dev_name(ndns->claim)); | |
1206 | ||
1207 | return ERR_PTR(-ENXIO); | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | size = nvdimm_namespace_capacity(ndns); | |
1212 | if (size < ND_MIN_NAMESPACE_SIZE) { | |
1213 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", | |
1214 | &size, ND_MIN_NAMESPACE_SIZE); | |
1215 | return ERR_PTR(-ENODEV); | |
1216 | } | |
1217 | ||
1218 | if (is_namespace_pmem(&ndns->dev)) { | |
1219 | struct nd_namespace_pmem *nspm; | |
1220 | ||
1221 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
1222 | if (!nspm->uuid) { | |
1223 | dev_dbg(&ndns->dev, "%s: uuid not set\n", __func__); | |
1224 | return ERR_PTR(-ENODEV); | |
1225 | } | |
1226 | } else if (is_namespace_blk(&ndns->dev)) { | |
1227 | return ERR_PTR(-ENODEV); /* TODO */ | |
1228 | } | |
1229 | ||
1230 | return ndns; | |
1231 | } | |
1232 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); | |
1233 | ||
3d88002e DW |
1234 | static struct device **create_namespace_io(struct nd_region *nd_region) |
1235 | { | |
1236 | struct nd_namespace_io *nsio; | |
1237 | struct device *dev, **devs; | |
1238 | struct resource *res; | |
1239 | ||
1240 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); | |
1241 | if (!nsio) | |
1242 | return NULL; | |
1243 | ||
1244 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1245 | if (!devs) { | |
1246 | kfree(nsio); | |
1247 | return NULL; | |
1248 | } | |
1249 | ||
8c2f7e86 | 1250 | dev = &nsio->common.dev; |
3d88002e DW |
1251 | dev->type = &namespace_io_device_type; |
1252 | dev->parent = &nd_region->dev; | |
1253 | res = &nsio->res; | |
1254 | res->name = dev_name(&nd_region->dev); | |
1255 | res->flags = IORESOURCE_MEM; | |
1256 | res->start = nd_region->ndr_start; | |
1257 | res->end = res->start + nd_region->ndr_size - 1; | |
1258 | ||
1259 | devs[0] = dev; | |
1260 | return devs; | |
1261 | } | |
1262 | ||
bf9bccc1 DW |
1263 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
1264 | u64 cookie, u16 pos) | |
1265 | { | |
1266 | struct nd_namespace_label *found = NULL; | |
1267 | int i; | |
1268 | ||
1269 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1270 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1271 | struct nd_namespace_label *nd_label; | |
1272 | bool found_uuid = false; | |
1273 | int l; | |
1274 | ||
1275 | for_each_label(l, nd_label, nd_mapping->labels) { | |
1276 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1277 | u16 position = __le16_to_cpu(nd_label->position); | |
1278 | u16 nlabel = __le16_to_cpu(nd_label->nlabel); | |
1279 | ||
1280 | if (isetcookie != cookie) | |
1281 | continue; | |
1282 | ||
1283 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1284 | continue; | |
1285 | ||
1286 | if (found_uuid) { | |
1287 | dev_dbg(to_ndd(nd_mapping)->dev, | |
1288 | "%s duplicate entry for uuid\n", | |
1289 | __func__); | |
1290 | return false; | |
1291 | } | |
1292 | found_uuid = true; | |
1293 | if (nlabel != nd_region->ndr_mappings) | |
1294 | continue; | |
1295 | if (position != pos) | |
1296 | continue; | |
1297 | found = nd_label; | |
1298 | break; | |
1299 | } | |
1300 | if (found) | |
1301 | break; | |
1302 | } | |
1303 | return found != NULL; | |
1304 | } | |
1305 | ||
1306 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) | |
1307 | { | |
1308 | struct nd_namespace_label *select = NULL; | |
1309 | int i; | |
1310 | ||
1311 | if (!pmem_id) | |
1312 | return -ENODEV; | |
1313 | ||
1314 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1315 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1316 | struct nd_namespace_label *nd_label; | |
1317 | u64 hw_start, hw_end, pmem_start, pmem_end; | |
1318 | int l; | |
1319 | ||
1320 | for_each_label(l, nd_label, nd_mapping->labels) | |
1321 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) | |
1322 | break; | |
1323 | ||
1324 | if (!nd_label) { | |
1325 | WARN_ON(1); | |
1326 | return -EINVAL; | |
1327 | } | |
1328 | ||
1329 | select = nd_label; | |
1330 | /* | |
1331 | * Check that this label is compliant with the dpa | |
1332 | * range published in NFIT | |
1333 | */ | |
1334 | hw_start = nd_mapping->start; | |
1335 | hw_end = hw_start + nd_mapping->size; | |
1336 | pmem_start = __le64_to_cpu(select->dpa); | |
1337 | pmem_end = pmem_start + __le64_to_cpu(select->rawsize); | |
1338 | if (pmem_start == hw_start && pmem_end <= hw_end) | |
1339 | /* pass */; | |
1340 | else | |
1341 | return -EINVAL; | |
1342 | ||
1343 | nd_mapping->labels[0] = select; | |
1344 | nd_mapping->labels[1] = NULL; | |
1345 | } | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | /** | |
1350 | * find_pmem_label_set - validate interleave set labelling, retrieve label0 | |
1351 | * @nd_region: region with mappings to validate | |
1352 | */ | |
1353 | static int find_pmem_label_set(struct nd_region *nd_region, | |
1354 | struct nd_namespace_pmem *nspm) | |
1355 | { | |
1356 | u64 cookie = nd_region_interleave_set_cookie(nd_region); | |
1357 | struct nd_namespace_label *nd_label; | |
1358 | u8 select_id[NSLABEL_UUID_LEN]; | |
1359 | resource_size_t size = 0; | |
1360 | u8 *pmem_id = NULL; | |
1361 | int rc = -ENODEV, l; | |
1362 | u16 i; | |
1363 | ||
1364 | if (cookie == 0) | |
1365 | return -ENXIO; | |
1366 | ||
1367 | /* | |
1368 | * Find a complete set of labels by uuid. By definition we can start | |
1369 | * with any mapping as the reference label | |
1370 | */ | |
1371 | for_each_label(l, nd_label, nd_region->mapping[0].labels) { | |
1372 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1373 | ||
1374 | if (isetcookie != cookie) | |
1375 | continue; | |
1376 | ||
1377 | for (i = 0; nd_region->ndr_mappings; i++) | |
1378 | if (!has_uuid_at_pos(nd_region, nd_label->uuid, | |
1379 | cookie, i)) | |
1380 | break; | |
1381 | if (i < nd_region->ndr_mappings) { | |
1382 | /* | |
1383 | * Give up if we don't find an instance of a | |
1384 | * uuid at each position (from 0 to | |
1385 | * nd_region->ndr_mappings - 1), or if we find a | |
1386 | * dimm with two instances of the same uuid. | |
1387 | */ | |
1388 | rc = -EINVAL; | |
1389 | goto err; | |
1390 | } else if (pmem_id) { | |
1391 | /* | |
1392 | * If there is more than one valid uuid set, we | |
1393 | * need userspace to clean this up. | |
1394 | */ | |
1395 | rc = -EBUSY; | |
1396 | goto err; | |
1397 | } | |
1398 | memcpy(select_id, nd_label->uuid, NSLABEL_UUID_LEN); | |
1399 | pmem_id = select_id; | |
1400 | } | |
1401 | ||
1402 | /* | |
1403 | * Fix up each mapping's 'labels' to have the validated pmem label for | |
1404 | * that position at labels[0], and NULL at labels[1]. In the process, | |
1405 | * check that the namespace aligns with interleave-set. We know | |
1406 | * that it does not overlap with any blk namespaces by virtue of | |
1407 | * the dimm being enabled (i.e. nd_label_reserve_dpa() | |
1408 | * succeeded). | |
1409 | */ | |
1410 | rc = select_pmem_id(nd_region, pmem_id); | |
1411 | if (rc) | |
1412 | goto err; | |
1413 | ||
1414 | /* Calculate total size and populate namespace properties from label0 */ | |
1415 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1416 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1417 | struct nd_namespace_label *label0 = nd_mapping->labels[0]; | |
1418 | ||
1419 | size += __le64_to_cpu(label0->rawsize); | |
1420 | if (__le16_to_cpu(label0->position) != 0) | |
1421 | continue; | |
1422 | WARN_ON(nspm->alt_name || nspm->uuid); | |
1423 | nspm->alt_name = kmemdup((void __force *) label0->name, | |
1424 | NSLABEL_NAME_LEN, GFP_KERNEL); | |
1425 | nspm->uuid = kmemdup((void __force *) label0->uuid, | |
1426 | NSLABEL_UUID_LEN, GFP_KERNEL); | |
1427 | } | |
1428 | ||
1429 | if (!nspm->alt_name || !nspm->uuid) { | |
1430 | rc = -ENOMEM; | |
1431 | goto err; | |
1432 | } | |
1433 | ||
1434 | nd_namespace_pmem_set_size(nd_region, nspm, size); | |
1435 | ||
1436 | return 0; | |
1437 | err: | |
1438 | switch (rc) { | |
1439 | case -EINVAL: | |
1440 | dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__); | |
1441 | break; | |
1442 | case -ENODEV: | |
1443 | dev_dbg(&nd_region->dev, "%s: label not found\n", __func__); | |
1444 | break; | |
1445 | default: | |
1446 | dev_dbg(&nd_region->dev, "%s: unexpected err: %d\n", | |
1447 | __func__, rc); | |
1448 | break; | |
1449 | } | |
1450 | return rc; | |
1451 | } | |
1452 | ||
1453 | static struct device **create_namespace_pmem(struct nd_region *nd_region) | |
1454 | { | |
1455 | struct nd_namespace_pmem *nspm; | |
1456 | struct device *dev, **devs; | |
1457 | struct resource *res; | |
1458 | int rc; | |
1459 | ||
1460 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
1461 | if (!nspm) | |
1462 | return NULL; | |
1463 | ||
8c2f7e86 | 1464 | dev = &nspm->nsio.common.dev; |
bf9bccc1 DW |
1465 | dev->type = &namespace_pmem_device_type; |
1466 | dev->parent = &nd_region->dev; | |
1467 | res = &nspm->nsio.res; | |
1468 | res->name = dev_name(&nd_region->dev); | |
1469 | res->flags = IORESOURCE_MEM; | |
1470 | rc = find_pmem_label_set(nd_region, nspm); | |
1471 | if (rc == -ENODEV) { | |
1472 | int i; | |
1473 | ||
1474 | /* Pass, try to permit namespace creation... */ | |
1475 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1476 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1477 | ||
1478 | kfree(nd_mapping->labels); | |
1479 | nd_mapping->labels = NULL; | |
1480 | } | |
1481 | ||
1482 | /* Publish a zero-sized namespace for userspace to configure. */ | |
1483 | nd_namespace_pmem_set_size(nd_region, nspm, 0); | |
1484 | ||
1485 | rc = 0; | |
1486 | } else if (rc) | |
1487 | goto err; | |
1488 | ||
1489 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1490 | if (!devs) | |
1491 | goto err; | |
1492 | ||
1493 | devs[0] = dev; | |
1494 | return devs; | |
1495 | ||
1496 | err: | |
8c2f7e86 | 1497 | namespace_pmem_release(&nspm->nsio.common.dev); |
bf9bccc1 DW |
1498 | return NULL; |
1499 | } | |
1500 | ||
1b40e09a DW |
1501 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
1502 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, | |
1503 | resource_size_t start) | |
1504 | { | |
1505 | struct nd_label_id label_id; | |
1506 | struct resource *res; | |
1507 | ||
1508 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
1509 | res = krealloc(nsblk->res, | |
1510 | sizeof(void *) * (nsblk->num_resources + 1), | |
1511 | GFP_KERNEL); | |
1512 | if (!res) | |
1513 | return NULL; | |
1514 | nsblk->res = (struct resource **) res; | |
1515 | for_each_dpa_resource(ndd, res) | |
1516 | if (strcmp(res->name, label_id.id) == 0 | |
1517 | && res->start == start) { | |
1518 | nsblk->res[nsblk->num_resources++] = res; | |
1519 | return res; | |
1520 | } | |
1521 | return NULL; | |
1522 | } | |
1523 | ||
1524 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) | |
1525 | { | |
1526 | struct nd_namespace_blk *nsblk; | |
1527 | struct device *dev; | |
1528 | ||
1529 | if (!is_nd_blk(&nd_region->dev)) | |
1530 | return NULL; | |
1531 | ||
1532 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1533 | if (!nsblk) | |
1534 | return NULL; | |
1535 | ||
8c2f7e86 | 1536 | dev = &nsblk->common.dev; |
1b40e09a DW |
1537 | dev->type = &namespace_blk_device_type; |
1538 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
1539 | if (nsblk->id < 0) { | |
1540 | kfree(nsblk); | |
1541 | return NULL; | |
1542 | } | |
1543 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); | |
1544 | dev->parent = &nd_region->dev; | |
1545 | dev->groups = nd_namespace_attribute_groups; | |
1546 | ||
8c2f7e86 | 1547 | return &nsblk->common.dev; |
1b40e09a DW |
1548 | } |
1549 | ||
1550 | void nd_region_create_blk_seed(struct nd_region *nd_region) | |
1551 | { | |
1552 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1553 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); | |
1554 | /* | |
1555 | * Seed creation failures are not fatal, provisioning is simply | |
1556 | * disabled until memory becomes available | |
1557 | */ | |
1558 | if (!nd_region->ns_seed) | |
1559 | dev_err(&nd_region->dev, "failed to create blk namespace\n"); | |
1560 | else | |
1561 | nd_device_register(nd_region->ns_seed); | |
1562 | } | |
1563 | ||
8c2f7e86 DW |
1564 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
1565 | { | |
1566 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1567 | nd_region->btt_seed = nd_btt_create(nd_region); | |
1568 | /* | |
1569 | * Seed creation failures are not fatal, provisioning is simply | |
1570 | * disabled until memory becomes available | |
1571 | */ | |
1572 | if (!nd_region->btt_seed) | |
1573 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); | |
1574 | } | |
1575 | ||
1b40e09a DW |
1576 | static struct device **create_namespace_blk(struct nd_region *nd_region) |
1577 | { | |
1578 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
1579 | struct nd_namespace_label *nd_label; | |
1580 | struct device *dev, **devs = NULL; | |
1581 | struct nd_namespace_blk *nsblk; | |
1582 | struct nvdimm_drvdata *ndd; | |
1583 | int i, l, count = 0; | |
1584 | struct resource *res; | |
1585 | ||
1586 | if (nd_region->ndr_mappings == 0) | |
1587 | return NULL; | |
1588 | ||
1589 | ndd = to_ndd(nd_mapping); | |
1590 | for_each_label(l, nd_label, nd_mapping->labels) { | |
1591 | u32 flags = __le32_to_cpu(nd_label->flags); | |
1592 | char *name[NSLABEL_NAME_LEN]; | |
1593 | struct device **__devs; | |
1594 | ||
1595 | if (flags & NSLABEL_FLAG_LOCAL) | |
1596 | /* pass */; | |
1597 | else | |
1598 | continue; | |
1599 | ||
1600 | for (i = 0; i < count; i++) { | |
1601 | nsblk = to_nd_namespace_blk(devs[i]); | |
1602 | if (memcmp(nsblk->uuid, nd_label->uuid, | |
1603 | NSLABEL_UUID_LEN) == 0) { | |
1604 | res = nsblk_add_resource(nd_region, ndd, nsblk, | |
1605 | __le64_to_cpu(nd_label->dpa)); | |
1606 | if (!res) | |
1607 | goto err; | |
1608 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", | |
8c2f7e86 | 1609 | dev_name(&nsblk->common.dev)); |
1b40e09a DW |
1610 | break; |
1611 | } | |
1612 | } | |
1613 | if (i < count) | |
1614 | continue; | |
1615 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); | |
1616 | if (!__devs) | |
1617 | goto err; | |
1618 | memcpy(__devs, devs, sizeof(dev) * count); | |
1619 | kfree(devs); | |
1620 | devs = __devs; | |
1621 | ||
1622 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1623 | if (!nsblk) | |
1624 | goto err; | |
8c2f7e86 | 1625 | dev = &nsblk->common.dev; |
1b40e09a DW |
1626 | dev->type = &namespace_blk_device_type; |
1627 | dev->parent = &nd_region->dev; | |
1628 | dev_set_name(dev, "namespace%d.%d", nd_region->id, count); | |
1629 | devs[count++] = dev; | |
1630 | nsblk->id = -1; | |
1631 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); | |
1632 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, | |
1633 | GFP_KERNEL); | |
1634 | if (!nsblk->uuid) | |
1635 | goto err; | |
1636 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); | |
1637 | if (name[0]) | |
1638 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, | |
1639 | GFP_KERNEL); | |
1640 | res = nsblk_add_resource(nd_region, ndd, nsblk, | |
1641 | __le64_to_cpu(nd_label->dpa)); | |
1642 | if (!res) | |
1643 | goto err; | |
1644 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", | |
8c2f7e86 | 1645 | dev_name(&nsblk->common.dev)); |
1b40e09a DW |
1646 | } |
1647 | ||
1648 | dev_dbg(&nd_region->dev, "%s: discovered %d blk namespace%s\n", | |
1649 | __func__, count, count == 1 ? "" : "s"); | |
1650 | ||
1651 | if (count == 0) { | |
1652 | /* Publish a zero-sized namespace for userspace to configure. */ | |
1653 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1654 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1655 | ||
1656 | kfree(nd_mapping->labels); | |
1657 | nd_mapping->labels = NULL; | |
1658 | } | |
1659 | ||
1660 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); | |
1661 | if (!devs) | |
1662 | goto err; | |
1663 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1664 | if (!nsblk) | |
1665 | goto err; | |
8c2f7e86 | 1666 | dev = &nsblk->common.dev; |
1b40e09a DW |
1667 | dev->type = &namespace_blk_device_type; |
1668 | dev->parent = &nd_region->dev; | |
1669 | devs[count++] = dev; | |
1670 | } | |
1671 | ||
1672 | return devs; | |
1673 | ||
1674 | err: | |
1675 | for (i = 0; i < count; i++) { | |
1676 | nsblk = to_nd_namespace_blk(devs[i]); | |
8c2f7e86 | 1677 | namespace_blk_release(&nsblk->common.dev); |
1b40e09a DW |
1678 | } |
1679 | kfree(devs); | |
1680 | return NULL; | |
1681 | } | |
1682 | ||
bf9bccc1 DW |
1683 | static int init_active_labels(struct nd_region *nd_region) |
1684 | { | |
1685 | int i; | |
1686 | ||
1687 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1688 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1689 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1690 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
1691 | int count, j; | |
1692 | ||
1693 | /* | |
1694 | * If the dimm is disabled then prevent the region from | |
1695 | * being activated if it aliases DPA. | |
1696 | */ | |
1697 | if (!ndd) { | |
1698 | if ((nvdimm->flags & NDD_ALIASING) == 0) | |
1699 | return 0; | |
1700 | dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", | |
1701 | dev_name(&nd_mapping->nvdimm->dev)); | |
1702 | return -ENXIO; | |
1703 | } | |
1704 | nd_mapping->ndd = ndd; | |
1705 | atomic_inc(&nvdimm->busy); | |
1706 | get_ndd(ndd); | |
1707 | ||
1708 | count = nd_label_active_count(ndd); | |
1709 | dev_dbg(ndd->dev, "%s: %d\n", __func__, count); | |
1710 | if (!count) | |
1711 | continue; | |
1712 | nd_mapping->labels = kcalloc(count + 1, sizeof(void *), | |
1713 | GFP_KERNEL); | |
1714 | if (!nd_mapping->labels) | |
1715 | return -ENOMEM; | |
1716 | for (j = 0; j < count; j++) { | |
1717 | struct nd_namespace_label *label; | |
1718 | ||
1719 | label = nd_label_active(ndd, j); | |
1720 | nd_mapping->labels[j] = label; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | ||
3d88002e DW |
1727 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
1728 | { | |
1729 | struct device **devs = NULL; | |
bf9bccc1 | 1730 | int i, rc = 0, type; |
3d88002e DW |
1731 | |
1732 | *err = 0; | |
bf9bccc1 DW |
1733 | nvdimm_bus_lock(&nd_region->dev); |
1734 | rc = init_active_labels(nd_region); | |
1735 | if (rc) { | |
1736 | nvdimm_bus_unlock(&nd_region->dev); | |
1737 | return rc; | |
1738 | } | |
1739 | ||
1740 | type = nd_region_to_nstype(nd_region); | |
1741 | switch (type) { | |
3d88002e DW |
1742 | case ND_DEVICE_NAMESPACE_IO: |
1743 | devs = create_namespace_io(nd_region); | |
1744 | break; | |
bf9bccc1 DW |
1745 | case ND_DEVICE_NAMESPACE_PMEM: |
1746 | devs = create_namespace_pmem(nd_region); | |
1747 | break; | |
1b40e09a DW |
1748 | case ND_DEVICE_NAMESPACE_BLK: |
1749 | devs = create_namespace_blk(nd_region); | |
1750 | break; | |
3d88002e DW |
1751 | default: |
1752 | break; | |
1753 | } | |
bf9bccc1 | 1754 | nvdimm_bus_unlock(&nd_region->dev); |
3d88002e DW |
1755 | |
1756 | if (!devs) | |
1757 | return -ENODEV; | |
1758 | ||
1759 | for (i = 0; devs[i]; i++) { | |
1760 | struct device *dev = devs[i]; | |
1b40e09a | 1761 | int id; |
3d88002e | 1762 | |
1b40e09a DW |
1763 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
1764 | struct nd_namespace_blk *nsblk; | |
1765 | ||
1766 | nsblk = to_nd_namespace_blk(dev); | |
1767 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
1768 | GFP_KERNEL); | |
1769 | nsblk->id = id; | |
1770 | } else | |
1771 | id = i; | |
1772 | ||
1773 | if (id < 0) | |
1774 | break; | |
1775 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); | |
3d88002e DW |
1776 | dev->groups = nd_namespace_attribute_groups; |
1777 | nd_device_register(dev); | |
1778 | } | |
1b40e09a DW |
1779 | if (i) |
1780 | nd_region->ns_seed = devs[0]; | |
1781 | ||
1782 | if (devs[i]) { | |
1783 | int j; | |
1784 | ||
1785 | for (j = i; devs[j]; j++) { | |
1786 | struct device *dev = devs[j]; | |
1787 | ||
1788 | device_initialize(dev); | |
1789 | put_device(dev); | |
1790 | } | |
1791 | *err = j - i; | |
1792 | /* | |
1793 | * All of the namespaces we tried to register failed, so | |
1794 | * fail region activation. | |
1795 | */ | |
1796 | if (*err == 0) | |
1797 | rc = -ENODEV; | |
1798 | } | |
3d88002e DW |
1799 | kfree(devs); |
1800 | ||
1b40e09a DW |
1801 | if (rc == -ENODEV) |
1802 | return rc; | |
1803 | ||
3d88002e DW |
1804 | return i; |
1805 | } |