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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> | |
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 | ||
004f1afb DW |
80 | bool pmem_should_map_pages(struct device *dev) |
81 | { | |
82 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
83 | ||
84 | if (!IS_ENABLED(CONFIG_ZONE_DEVICE)) | |
85 | return false; | |
86 | ||
87 | if (!test_bit(ND_REGION_PAGEMAP, &nd_region->flags)) | |
88 | return false; | |
89 | ||
90 | if (is_nd_pfn(dev) || is_nd_btt(dev)) | |
91 | return false; | |
92 | ||
93 | #ifdef ARCH_MEMREMAP_PMEM | |
94 | return ARCH_MEMREMAP_PMEM == MEMREMAP_WB; | |
95 | #else | |
96 | return false; | |
97 | #endif | |
98 | } | |
99 | EXPORT_SYMBOL(pmem_should_map_pages); | |
100 | ||
5212e11f VV |
101 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
102 | char *name) | |
103 | { | |
104 | struct nd_region *nd_region = to_nd_region(ndns->dev.parent); | |
004f1afb | 105 | const char *suffix = NULL; |
5212e11f | 106 | |
e1455744 DW |
107 | if (ndns->claim) { |
108 | if (is_nd_btt(ndns->claim)) | |
109 | suffix = "s"; | |
110 | else if (is_nd_pfn(ndns->claim)) | |
111 | suffix = "m"; | |
112 | else | |
113 | dev_WARN_ONCE(&ndns->dev, 1, | |
114 | "unknown claim type by %s\n", | |
115 | dev_name(ndns->claim)); | |
116 | } | |
5212e11f | 117 | |
004f1afb DW |
118 | if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) { |
119 | if (!suffix && pmem_should_map_pages(&ndns->dev)) | |
120 | suffix = "m"; | |
121 | sprintf(name, "pmem%d%s", nd_region->id, suffix ? suffix : ""); | |
122 | } else if (is_namespace_blk(&ndns->dev)) { | |
5212e11f VV |
123 | struct nd_namespace_blk *nsblk; |
124 | ||
125 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
004f1afb DW |
126 | sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, |
127 | suffix ? suffix : ""); | |
5212e11f VV |
128 | } else { |
129 | return NULL; | |
130 | } | |
131 | ||
132 | return name; | |
133 | } | |
134 | EXPORT_SYMBOL(nvdimm_namespace_disk_name); | |
135 | ||
6ec68954 VV |
136 | const u8 *nd_dev_to_uuid(struct device *dev) |
137 | { | |
138 | static const u8 null_uuid[16]; | |
139 | ||
140 | if (!dev) | |
141 | return null_uuid; | |
142 | ||
143 | if (is_namespace_pmem(dev)) { | |
144 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
145 | ||
146 | return nspm->uuid; | |
147 | } else if (is_namespace_blk(dev)) { | |
148 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
149 | ||
150 | return nsblk->uuid; | |
151 | } else | |
152 | return null_uuid; | |
153 | } | |
154 | EXPORT_SYMBOL(nd_dev_to_uuid); | |
155 | ||
3d88002e DW |
156 | static ssize_t nstype_show(struct device *dev, |
157 | struct device_attribute *attr, char *buf) | |
158 | { | |
159 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
160 | ||
161 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); | |
162 | } | |
163 | static DEVICE_ATTR_RO(nstype); | |
164 | ||
bf9bccc1 DW |
165 | static ssize_t __alt_name_store(struct device *dev, const char *buf, |
166 | const size_t len) | |
167 | { | |
168 | char *input, *pos, *alt_name, **ns_altname; | |
169 | ssize_t rc; | |
170 | ||
171 | if (is_namespace_pmem(dev)) { | |
172 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
173 | ||
174 | ns_altname = &nspm->alt_name; | |
175 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
176 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
177 | ||
178 | ns_altname = &nsblk->alt_name; | |
bf9bccc1 DW |
179 | } else |
180 | return -ENXIO; | |
181 | ||
8c2f7e86 | 182 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
183 | return -EBUSY; |
184 | ||
185 | input = kmemdup(buf, len + 1, GFP_KERNEL); | |
186 | if (!input) | |
187 | return -ENOMEM; | |
188 | ||
189 | input[len] = '\0'; | |
190 | pos = strim(input); | |
191 | if (strlen(pos) + 1 > NSLABEL_NAME_LEN) { | |
192 | rc = -EINVAL; | |
193 | goto out; | |
194 | } | |
195 | ||
196 | alt_name = kzalloc(NSLABEL_NAME_LEN, GFP_KERNEL); | |
197 | if (!alt_name) { | |
198 | rc = -ENOMEM; | |
199 | goto out; | |
200 | } | |
201 | kfree(*ns_altname); | |
202 | *ns_altname = alt_name; | |
203 | sprintf(*ns_altname, "%s", pos); | |
204 | rc = len; | |
205 | ||
206 | out: | |
207 | kfree(input); | |
208 | return rc; | |
209 | } | |
210 | ||
1b40e09a DW |
211 | static resource_size_t nd_namespace_blk_size(struct nd_namespace_blk *nsblk) |
212 | { | |
8c2f7e86 | 213 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); |
1b40e09a DW |
214 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; |
215 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
216 | struct nd_label_id label_id; | |
217 | resource_size_t size = 0; | |
218 | struct resource *res; | |
219 | ||
220 | if (!nsblk->uuid) | |
221 | return 0; | |
222 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
223 | for_each_dpa_resource(ndd, res) | |
224 | if (strcmp(res->name, label_id.id) == 0) | |
225 | size += resource_size(res); | |
226 | return size; | |
227 | } | |
228 | ||
047fc8a1 RZ |
229 | static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) |
230 | { | |
231 | struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); | |
232 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
233 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
234 | struct nd_label_id label_id; | |
235 | struct resource *res; | |
236 | int count, i; | |
237 | ||
238 | if (!nsblk->uuid || !nsblk->lbasize || !ndd) | |
239 | return false; | |
240 | ||
241 | count = 0; | |
242 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
243 | for_each_dpa_resource(ndd, res) { | |
244 | if (strcmp(res->name, label_id.id) != 0) | |
245 | continue; | |
246 | /* | |
247 | * Resources with unacknoweldged adjustments indicate a | |
248 | * failure to update labels | |
249 | */ | |
250 | if (res->flags & DPA_RESOURCE_ADJUSTED) | |
251 | return false; | |
252 | count++; | |
253 | } | |
254 | ||
255 | /* These values match after a successful label update */ | |
256 | if (count != nsblk->num_resources) | |
257 | return false; | |
258 | ||
259 | for (i = 0; i < nsblk->num_resources; i++) { | |
260 | struct resource *found = NULL; | |
261 | ||
262 | for_each_dpa_resource(ndd, res) | |
263 | if (res == nsblk->res[i]) { | |
264 | found = res; | |
265 | break; | |
266 | } | |
267 | /* stale resource */ | |
268 | if (!found) | |
269 | return false; | |
270 | } | |
271 | ||
272 | return true; | |
273 | } | |
274 | ||
275 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) | |
276 | { | |
277 | resource_size_t size; | |
278 | ||
279 | nvdimm_bus_lock(&nsblk->common.dev); | |
280 | size = __nd_namespace_blk_validate(nsblk); | |
281 | nvdimm_bus_unlock(&nsblk->common.dev); | |
282 | ||
283 | return size; | |
284 | } | |
285 | EXPORT_SYMBOL(nd_namespace_blk_validate); | |
286 | ||
287 | ||
f524bf27 DW |
288 | static int nd_namespace_label_update(struct nd_region *nd_region, |
289 | struct device *dev) | |
290 | { | |
8c2f7e86 | 291 | dev_WARN_ONCE(dev, dev->driver || to_ndns(dev)->claim, |
f524bf27 | 292 | "namespace must be idle during label update\n"); |
8c2f7e86 | 293 | if (dev->driver || to_ndns(dev)->claim) |
f524bf27 DW |
294 | return 0; |
295 | ||
296 | /* | |
297 | * Only allow label writes that will result in a valid namespace | |
298 | * or deletion of an existing namespace. | |
299 | */ | |
300 | if (is_namespace_pmem(dev)) { | |
301 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
0ba1c634 | 302 | resource_size_t size = resource_size(&nspm->nsio.res); |
f524bf27 DW |
303 | |
304 | if (size == 0 && nspm->uuid) | |
305 | /* delete allocation */; | |
306 | else if (!nspm->uuid) | |
307 | return 0; | |
308 | ||
309 | return nd_pmem_namespace_label_update(nd_region, nspm, size); | |
310 | } else if (is_namespace_blk(dev)) { | |
0ba1c634 DW |
311 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
312 | resource_size_t size = nd_namespace_blk_size(nsblk); | |
313 | ||
314 | if (size == 0 && nsblk->uuid) | |
315 | /* delete allocation */; | |
316 | else if (!nsblk->uuid || !nsblk->lbasize) | |
317 | return 0; | |
318 | ||
319 | return nd_blk_namespace_label_update(nd_region, nsblk, size); | |
f524bf27 DW |
320 | } else |
321 | return -ENXIO; | |
322 | } | |
323 | ||
bf9bccc1 DW |
324 | static ssize_t alt_name_store(struct device *dev, |
325 | struct device_attribute *attr, const char *buf, size_t len) | |
326 | { | |
f524bf27 | 327 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
328 | ssize_t rc; |
329 | ||
330 | device_lock(dev); | |
331 | nvdimm_bus_lock(dev); | |
332 | wait_nvdimm_bus_probe_idle(dev); | |
333 | rc = __alt_name_store(dev, buf, len); | |
f524bf27 DW |
334 | if (rc >= 0) |
335 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
336 | dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc); |
337 | nvdimm_bus_unlock(dev); | |
338 | device_unlock(dev); | |
339 | ||
f524bf27 | 340 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
341 | } |
342 | ||
343 | static ssize_t alt_name_show(struct device *dev, | |
344 | struct device_attribute *attr, char *buf) | |
345 | { | |
346 | char *ns_altname; | |
347 | ||
348 | if (is_namespace_pmem(dev)) { | |
349 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
350 | ||
351 | ns_altname = nspm->alt_name; | |
352 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
353 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
354 | ||
355 | ns_altname = nsblk->alt_name; | |
bf9bccc1 DW |
356 | } else |
357 | return -ENXIO; | |
358 | ||
359 | return sprintf(buf, "%s\n", ns_altname ? ns_altname : ""); | |
360 | } | |
361 | static DEVICE_ATTR_RW(alt_name); | |
362 | ||
363 | static int scan_free(struct nd_region *nd_region, | |
364 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
365 | resource_size_t n) | |
366 | { | |
367 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
368 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
369 | int rc = 0; | |
370 | ||
371 | while (n) { | |
372 | struct resource *res, *last; | |
373 | resource_size_t new_start; | |
374 | ||
375 | last = NULL; | |
376 | for_each_dpa_resource(ndd, res) | |
377 | if (strcmp(res->name, label_id->id) == 0) | |
378 | last = res; | |
379 | res = last; | |
380 | if (!res) | |
381 | return 0; | |
382 | ||
383 | if (n >= resource_size(res)) { | |
384 | n -= resource_size(res); | |
385 | nd_dbg_dpa(nd_region, ndd, res, "delete %d\n", rc); | |
386 | nvdimm_free_dpa(ndd, res); | |
387 | /* retry with last resource deleted */ | |
388 | continue; | |
389 | } | |
390 | ||
391 | /* | |
392 | * Keep BLK allocations relegated to high DPA as much as | |
393 | * possible | |
394 | */ | |
395 | if (is_blk) | |
396 | new_start = res->start + n; | |
397 | else | |
398 | new_start = res->start; | |
399 | ||
400 | rc = adjust_resource(res, new_start, resource_size(res) - n); | |
1b40e09a DW |
401 | if (rc == 0) |
402 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
403 | nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); |
404 | break; | |
405 | } | |
406 | ||
407 | return rc; | |
408 | } | |
409 | ||
410 | /** | |
411 | * shrink_dpa_allocation - for each dimm in region free n bytes for label_id | |
412 | * @nd_region: the set of dimms to reclaim @n bytes from | |
413 | * @label_id: unique identifier for the namespace consuming this dpa range | |
414 | * @n: number of bytes per-dimm to release | |
415 | * | |
416 | * Assumes resources are ordered. Starting from the end try to | |
417 | * adjust_resource() the allocation to @n, but if @n is larger than the | |
418 | * allocation delete it and find the 'new' last allocation in the label | |
419 | * set. | |
420 | */ | |
421 | static int shrink_dpa_allocation(struct nd_region *nd_region, | |
422 | struct nd_label_id *label_id, resource_size_t n) | |
423 | { | |
424 | int i; | |
425 | ||
426 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
427 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
428 | int rc; | |
429 | ||
430 | rc = scan_free(nd_region, nd_mapping, label_id, n); | |
431 | if (rc) | |
432 | return rc; | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
438 | static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, | |
439 | struct nd_region *nd_region, struct nd_mapping *nd_mapping, | |
440 | resource_size_t n) | |
441 | { | |
442 | bool is_blk = strncmp(label_id->id, "blk", 3) == 0; | |
443 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
444 | resource_size_t first_dpa; | |
445 | struct resource *res; | |
446 | int rc = 0; | |
447 | ||
448 | /* allocate blk from highest dpa first */ | |
449 | if (is_blk) | |
450 | first_dpa = nd_mapping->start + nd_mapping->size - n; | |
451 | else | |
452 | first_dpa = nd_mapping->start; | |
453 | ||
454 | /* first resource allocation for this label-id or dimm */ | |
455 | res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); | |
456 | if (!res) | |
457 | rc = -EBUSY; | |
458 | ||
459 | nd_dbg_dpa(nd_region, ndd, res, "init %d\n", rc); | |
460 | return rc ? n : 0; | |
461 | } | |
462 | ||
1b40e09a DW |
463 | static bool space_valid(bool is_pmem, bool is_reserve, |
464 | struct nd_label_id *label_id, struct resource *res) | |
bf9bccc1 DW |
465 | { |
466 | /* | |
467 | * For BLK-space any space is valid, for PMEM-space, it must be | |
1b40e09a DW |
468 | * contiguous with an existing allocation unless we are |
469 | * reserving pmem. | |
bf9bccc1 | 470 | */ |
1b40e09a | 471 | if (is_reserve || !is_pmem) |
bf9bccc1 DW |
472 | return true; |
473 | if (!res || strcmp(res->name, label_id->id) == 0) | |
474 | return true; | |
475 | return false; | |
476 | } | |
477 | ||
478 | enum alloc_loc { | |
479 | ALLOC_ERR = 0, ALLOC_BEFORE, ALLOC_MID, ALLOC_AFTER, | |
480 | }; | |
481 | ||
482 | static resource_size_t scan_allocate(struct nd_region *nd_region, | |
483 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id, | |
484 | resource_size_t n) | |
485 | { | |
486 | resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; | |
1b40e09a | 487 | bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; |
bf9bccc1 DW |
488 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; |
489 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
490 | const resource_size_t to_allocate = n; | |
491 | struct resource *res; | |
492 | int first; | |
493 | ||
494 | retry: | |
495 | first = 0; | |
496 | for_each_dpa_resource(ndd, res) { | |
497 | resource_size_t allocate, available = 0, free_start, free_end; | |
498 | struct resource *next = res->sibling, *new_res = NULL; | |
499 | enum alloc_loc loc = ALLOC_ERR; | |
500 | const char *action; | |
501 | int rc = 0; | |
502 | ||
503 | /* ignore resources outside this nd_mapping */ | |
504 | if (res->start > mapping_end) | |
505 | continue; | |
506 | if (res->end < nd_mapping->start) | |
507 | continue; | |
508 | ||
509 | /* space at the beginning of the mapping */ | |
510 | if (!first++ && res->start > nd_mapping->start) { | |
511 | free_start = nd_mapping->start; | |
512 | available = res->start - free_start; | |
1b40e09a | 513 | if (space_valid(is_pmem, is_reserve, label_id, NULL)) |
bf9bccc1 DW |
514 | loc = ALLOC_BEFORE; |
515 | } | |
516 | ||
517 | /* space between allocations */ | |
518 | if (!loc && next) { | |
519 | free_start = res->start + resource_size(res); | |
520 | free_end = min(mapping_end, next->start - 1); | |
1b40e09a | 521 | if (space_valid(is_pmem, is_reserve, label_id, res) |
bf9bccc1 DW |
522 | && free_start < free_end) { |
523 | available = free_end + 1 - free_start; | |
524 | loc = ALLOC_MID; | |
525 | } | |
526 | } | |
527 | ||
528 | /* space at the end of the mapping */ | |
529 | if (!loc && !next) { | |
530 | free_start = res->start + resource_size(res); | |
531 | free_end = mapping_end; | |
1b40e09a | 532 | if (space_valid(is_pmem, is_reserve, label_id, res) |
bf9bccc1 DW |
533 | && free_start < free_end) { |
534 | available = free_end + 1 - free_start; | |
535 | loc = ALLOC_AFTER; | |
536 | } | |
537 | } | |
538 | ||
539 | if (!loc || !available) | |
540 | continue; | |
541 | allocate = min(available, n); | |
542 | switch (loc) { | |
543 | case ALLOC_BEFORE: | |
544 | if (strcmp(res->name, label_id->id) == 0) { | |
545 | /* adjust current resource up */ | |
1b40e09a | 546 | if (is_pmem && !is_reserve) |
bf9bccc1 DW |
547 | return n; |
548 | rc = adjust_resource(res, res->start - allocate, | |
549 | resource_size(res) + allocate); | |
550 | action = "cur grow up"; | |
551 | } else | |
552 | action = "allocate"; | |
553 | break; | |
554 | case ALLOC_MID: | |
555 | if (strcmp(next->name, label_id->id) == 0) { | |
556 | /* adjust next resource up */ | |
1b40e09a | 557 | if (is_pmem && !is_reserve) |
bf9bccc1 DW |
558 | return n; |
559 | rc = adjust_resource(next, next->start | |
560 | - allocate, resource_size(next) | |
561 | + allocate); | |
562 | new_res = next; | |
563 | action = "next grow up"; | |
564 | } else if (strcmp(res->name, label_id->id) == 0) { | |
565 | action = "grow down"; | |
566 | } else | |
567 | action = "allocate"; | |
568 | break; | |
569 | case ALLOC_AFTER: | |
570 | if (strcmp(res->name, label_id->id) == 0) | |
571 | action = "grow down"; | |
572 | else | |
573 | action = "allocate"; | |
574 | break; | |
575 | default: | |
576 | return n; | |
577 | } | |
578 | ||
579 | if (strcmp(action, "allocate") == 0) { | |
580 | /* BLK allocate bottom up */ | |
581 | if (!is_pmem) | |
582 | free_start += available - allocate; | |
1b40e09a | 583 | else if (!is_reserve && free_start != nd_mapping->start) |
bf9bccc1 DW |
584 | return n; |
585 | ||
586 | new_res = nvdimm_allocate_dpa(ndd, label_id, | |
587 | free_start, allocate); | |
588 | if (!new_res) | |
589 | rc = -EBUSY; | |
590 | } else if (strcmp(action, "grow down") == 0) { | |
591 | /* adjust current resource down */ | |
592 | rc = adjust_resource(res, res->start, resource_size(res) | |
593 | + allocate); | |
1b40e09a DW |
594 | if (rc == 0) |
595 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
bf9bccc1 DW |
596 | } |
597 | ||
598 | if (!new_res) | |
599 | new_res = res; | |
600 | ||
601 | nd_dbg_dpa(nd_region, ndd, new_res, "%s(%d) %d\n", | |
602 | action, loc, rc); | |
603 | ||
604 | if (rc) | |
605 | return n; | |
606 | ||
607 | n -= allocate; | |
608 | if (n) { | |
609 | /* | |
610 | * Retry scan with newly inserted resources. | |
611 | * For example, if we did an ALLOC_BEFORE | |
612 | * insertion there may also have been space | |
613 | * available for an ALLOC_AFTER insertion, so we | |
614 | * need to check this same resource again | |
615 | */ | |
616 | goto retry; | |
617 | } else | |
618 | return 0; | |
619 | } | |
620 | ||
1b40e09a DW |
621 | /* |
622 | * If we allocated nothing in the BLK case it may be because we are in | |
623 | * an initial "pmem-reserve pass". Only do an initial BLK allocation | |
624 | * when none of the DPA space is reserved. | |
625 | */ | |
626 | if ((is_pmem || !ndd->dpa.child) && n == to_allocate) | |
bf9bccc1 DW |
627 | return init_dpa_allocation(label_id, nd_region, nd_mapping, n); |
628 | return n; | |
629 | } | |
630 | ||
1b40e09a DW |
631 | static int merge_dpa(struct nd_region *nd_region, |
632 | struct nd_mapping *nd_mapping, struct nd_label_id *label_id) | |
633 | { | |
634 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
635 | struct resource *res; | |
636 | ||
637 | if (strncmp("pmem", label_id->id, 4) == 0) | |
638 | return 0; | |
639 | retry: | |
640 | for_each_dpa_resource(ndd, res) { | |
641 | int rc; | |
642 | struct resource *next = res->sibling; | |
643 | resource_size_t end = res->start + resource_size(res); | |
644 | ||
645 | if (!next || strcmp(res->name, label_id->id) != 0 | |
646 | || strcmp(next->name, label_id->id) != 0 | |
647 | || end != next->start) | |
648 | continue; | |
649 | end += resource_size(next); | |
650 | nvdimm_free_dpa(ndd, next); | |
651 | rc = adjust_resource(res, res->start, end - res->start); | |
652 | nd_dbg_dpa(nd_region, ndd, res, "merge %d\n", rc); | |
653 | if (rc) | |
654 | return rc; | |
655 | res->flags |= DPA_RESOURCE_ADJUSTED; | |
656 | goto retry; | |
657 | } | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
662 | static int __reserve_free_pmem(struct device *dev, void *data) | |
663 | { | |
664 | struct nvdimm *nvdimm = data; | |
665 | struct nd_region *nd_region; | |
666 | struct nd_label_id label_id; | |
667 | int i; | |
668 | ||
669 | if (!is_nd_pmem(dev)) | |
670 | return 0; | |
671 | ||
672 | nd_region = to_nd_region(dev); | |
673 | if (nd_region->ndr_mappings == 0) | |
674 | return 0; | |
675 | ||
676 | memset(&label_id, 0, sizeof(label_id)); | |
677 | strcat(label_id.id, "pmem-reserve"); | |
678 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
679 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
680 | resource_size_t n, rem = 0; | |
681 | ||
682 | if (nd_mapping->nvdimm != nvdimm) | |
683 | continue; | |
684 | ||
685 | n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); | |
686 | if (n == 0) | |
687 | return 0; | |
688 | rem = scan_allocate(nd_region, nd_mapping, &label_id, n); | |
689 | dev_WARN_ONCE(&nd_region->dev, rem, | |
690 | "pmem reserve underrun: %#llx of %#llx bytes\n", | |
691 | (unsigned long long) n - rem, | |
692 | (unsigned long long) n); | |
693 | return rem ? -ENXIO : 0; | |
694 | } | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | static void release_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
700 | struct nd_mapping *nd_mapping) | |
701 | { | |
702 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
703 | struct resource *res, *_res; | |
704 | ||
705 | for_each_dpa_resource_safe(ndd, res, _res) | |
706 | if (strcmp(res->name, "pmem-reserve") == 0) | |
707 | nvdimm_free_dpa(ndd, res); | |
708 | } | |
709 | ||
710 | static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, | |
711 | struct nd_mapping *nd_mapping) | |
712 | { | |
713 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
714 | int rc; | |
715 | ||
716 | rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, | |
717 | __reserve_free_pmem); | |
718 | if (rc) | |
719 | release_free_pmem(nvdimm_bus, nd_mapping); | |
720 | return rc; | |
721 | } | |
722 | ||
bf9bccc1 DW |
723 | /** |
724 | * grow_dpa_allocation - for each dimm allocate n bytes for @label_id | |
725 | * @nd_region: the set of dimms to allocate @n more bytes from | |
726 | * @label_id: unique identifier for the namespace consuming this dpa range | |
727 | * @n: number of bytes per-dimm to add to the existing allocation | |
728 | * | |
729 | * Assumes resources are ordered. For BLK regions, first consume | |
730 | * BLK-only available DPA free space, then consume PMEM-aliased DPA | |
731 | * space starting at the highest DPA. For PMEM regions start | |
732 | * allocations from the start of an interleave set and end at the first | |
733 | * BLK allocation or the end of the interleave set, whichever comes | |
734 | * first. | |
735 | */ | |
736 | static int grow_dpa_allocation(struct nd_region *nd_region, | |
737 | struct nd_label_id *label_id, resource_size_t n) | |
738 | { | |
1b40e09a DW |
739 | struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); |
740 | bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; | |
bf9bccc1 DW |
741 | int i; |
742 | ||
743 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
744 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1b40e09a DW |
745 | resource_size_t rem = n; |
746 | int rc, j; | |
747 | ||
748 | /* | |
749 | * In the BLK case try once with all unallocated PMEM | |
750 | * reserved, and once without | |
751 | */ | |
752 | for (j = is_pmem; j < 2; j++) { | |
753 | bool blk_only = j == 0; | |
754 | ||
755 | if (blk_only) { | |
756 | rc = reserve_free_pmem(nvdimm_bus, nd_mapping); | |
757 | if (rc) | |
758 | return rc; | |
759 | } | |
760 | rem = scan_allocate(nd_region, nd_mapping, | |
761 | label_id, rem); | |
762 | if (blk_only) | |
763 | release_free_pmem(nvdimm_bus, nd_mapping); | |
bf9bccc1 | 764 | |
1b40e09a DW |
765 | /* try again and allow encroachments into PMEM */ |
766 | if (rem == 0) | |
767 | break; | |
768 | } | |
769 | ||
770 | dev_WARN_ONCE(&nd_region->dev, rem, | |
771 | "allocation underrun: %#llx of %#llx bytes\n", | |
772 | (unsigned long long) n - rem, | |
773 | (unsigned long long) n); | |
774 | if (rem) | |
775 | return -ENXIO; | |
776 | ||
777 | rc = merge_dpa(nd_region, nd_mapping, label_id); | |
bf9bccc1 DW |
778 | if (rc) |
779 | return rc; | |
780 | } | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | static void nd_namespace_pmem_set_size(struct nd_region *nd_region, | |
786 | struct nd_namespace_pmem *nspm, resource_size_t size) | |
787 | { | |
788 | struct resource *res = &nspm->nsio.res; | |
789 | ||
790 | res->start = nd_region->ndr_start; | |
791 | res->end = nd_region->ndr_start + size - 1; | |
792 | } | |
793 | ||
794 | static ssize_t __size_store(struct device *dev, unsigned long long val) | |
795 | { | |
796 | resource_size_t allocated = 0, available = 0; | |
797 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
798 | struct nd_mapping *nd_mapping; | |
799 | struct nvdimm_drvdata *ndd; | |
800 | struct nd_label_id label_id; | |
801 | u32 flags = 0, remainder; | |
802 | u8 *uuid = NULL; | |
803 | int rc, i; | |
804 | ||
8c2f7e86 | 805 | if (dev->driver || to_ndns(dev)->claim) |
bf9bccc1 DW |
806 | return -EBUSY; |
807 | ||
808 | if (is_namespace_pmem(dev)) { | |
809 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
810 | ||
811 | uuid = nspm->uuid; | |
812 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
813 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
814 | ||
815 | uuid = nsblk->uuid; | |
816 | flags = NSLABEL_FLAG_LOCAL; | |
bf9bccc1 DW |
817 | } |
818 | ||
819 | /* | |
820 | * We need a uuid for the allocation-label and dimm(s) on which | |
821 | * to store the label. | |
822 | */ | |
823 | if (!uuid || nd_region->ndr_mappings == 0) | |
824 | return -ENXIO; | |
825 | ||
826 | div_u64_rem(val, SZ_4K * nd_region->ndr_mappings, &remainder); | |
827 | if (remainder) { | |
828 | dev_dbg(dev, "%llu is not %dK aligned\n", val, | |
829 | (SZ_4K * nd_region->ndr_mappings) / SZ_1K); | |
830 | return -EINVAL; | |
831 | } | |
832 | ||
833 | nd_label_gen_id(&label_id, uuid, flags); | |
834 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
835 | nd_mapping = &nd_region->mapping[i]; | |
836 | ndd = to_ndd(nd_mapping); | |
837 | ||
838 | /* | |
839 | * All dimms in an interleave set, or the base dimm for a blk | |
840 | * region, need to be enabled for the size to be changed. | |
841 | */ | |
842 | if (!ndd) | |
843 | return -ENXIO; | |
844 | ||
845 | allocated += nvdimm_allocated_dpa(ndd, &label_id); | |
846 | } | |
847 | available = nd_region_available_dpa(nd_region); | |
848 | ||
849 | if (val > available + allocated) | |
850 | return -ENOSPC; | |
851 | ||
852 | if (val == allocated) | |
853 | return 0; | |
854 | ||
855 | val = div_u64(val, nd_region->ndr_mappings); | |
856 | allocated = div_u64(allocated, nd_region->ndr_mappings); | |
857 | if (val < allocated) | |
858 | rc = shrink_dpa_allocation(nd_region, &label_id, | |
859 | allocated - val); | |
860 | else | |
861 | rc = grow_dpa_allocation(nd_region, &label_id, val - allocated); | |
862 | ||
863 | if (rc) | |
864 | return rc; | |
865 | ||
866 | if (is_namespace_pmem(dev)) { | |
867 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
868 | ||
869 | nd_namespace_pmem_set_size(nd_region, nspm, | |
870 | val * nd_region->ndr_mappings); | |
1b40e09a | 871 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 DW |
872 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
873 | ||
1b40e09a DW |
874 | /* |
875 | * Try to delete the namespace if we deleted all of its | |
8c2f7e86 DW |
876 | * allocation, this is not the seed device for the |
877 | * region, and it is not actively claimed by a btt | |
878 | * instance. | |
1b40e09a | 879 | */ |
8c2f7e86 DW |
880 | if (val == 0 && nd_region->ns_seed != dev |
881 | && !nsblk->common.claim) | |
1b40e09a | 882 | nd_device_unregister(dev, ND_ASYNC); |
bf9bccc1 DW |
883 | } |
884 | ||
885 | return rc; | |
886 | } | |
887 | ||
888 | static ssize_t size_store(struct device *dev, | |
889 | struct device_attribute *attr, const char *buf, size_t len) | |
890 | { | |
f524bf27 | 891 | struct nd_region *nd_region = to_nd_region(dev->parent); |
bf9bccc1 DW |
892 | unsigned long long val; |
893 | u8 **uuid = NULL; | |
894 | int rc; | |
895 | ||
896 | rc = kstrtoull(buf, 0, &val); | |
897 | if (rc) | |
898 | return rc; | |
899 | ||
900 | device_lock(dev); | |
901 | nvdimm_bus_lock(dev); | |
902 | wait_nvdimm_bus_probe_idle(dev); | |
903 | rc = __size_store(dev, val); | |
f524bf27 DW |
904 | if (rc >= 0) |
905 | rc = nd_namespace_label_update(nd_region, dev); | |
bf9bccc1 DW |
906 | |
907 | if (is_namespace_pmem(dev)) { | |
908 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
909 | ||
910 | uuid = &nspm->uuid; | |
911 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
912 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
913 | ||
914 | uuid = &nsblk->uuid; | |
bf9bccc1 DW |
915 | } |
916 | ||
917 | if (rc == 0 && val == 0 && uuid) { | |
918 | /* setting size zero == 'delete namespace' */ | |
919 | kfree(*uuid); | |
920 | *uuid = NULL; | |
921 | } | |
922 | ||
923 | dev_dbg(dev, "%s: %llx %s (%d)\n", __func__, val, rc < 0 | |
924 | ? "fail" : "success", rc); | |
925 | ||
926 | nvdimm_bus_unlock(dev); | |
927 | device_unlock(dev); | |
928 | ||
f524bf27 | 929 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
930 | } |
931 | ||
8c2f7e86 | 932 | resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns) |
bf9bccc1 | 933 | { |
8c2f7e86 | 934 | struct device *dev = &ndns->dev; |
1b40e09a | 935 | |
bf9bccc1 DW |
936 | if (is_namespace_pmem(dev)) { |
937 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
938 | ||
8c2f7e86 | 939 | return resource_size(&nspm->nsio.res); |
bf9bccc1 | 940 | } else if (is_namespace_blk(dev)) { |
8c2f7e86 | 941 | return nd_namespace_blk_size(to_nd_namespace_blk(dev)); |
bf9bccc1 DW |
942 | } else if (is_namespace_io(dev)) { |
943 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
944 | ||
8c2f7e86 DW |
945 | return resource_size(&nsio->res); |
946 | } else | |
947 | WARN_ONCE(1, "unknown namespace type\n"); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns) | |
952 | { | |
953 | resource_size_t size; | |
1b40e09a | 954 | |
8c2f7e86 DW |
955 | nvdimm_bus_lock(&ndns->dev); |
956 | size = __nvdimm_namespace_capacity(ndns); | |
957 | nvdimm_bus_unlock(&ndns->dev); | |
958 | ||
959 | return size; | |
960 | } | |
961 | EXPORT_SYMBOL(nvdimm_namespace_capacity); | |
962 | ||
963 | static ssize_t size_show(struct device *dev, | |
964 | struct device_attribute *attr, char *buf) | |
965 | { | |
966 | return sprintf(buf, "%llu\n", (unsigned long long) | |
967 | nvdimm_namespace_capacity(to_ndns(dev))); | |
bf9bccc1 DW |
968 | } |
969 | static DEVICE_ATTR(size, S_IRUGO, size_show, size_store); | |
970 | ||
971 | static ssize_t uuid_show(struct device *dev, | |
972 | struct device_attribute *attr, char *buf) | |
973 | { | |
974 | u8 *uuid; | |
975 | ||
976 | if (is_namespace_pmem(dev)) { | |
977 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
978 | ||
979 | uuid = nspm->uuid; | |
980 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
981 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
982 | ||
983 | uuid = nsblk->uuid; | |
bf9bccc1 DW |
984 | } else |
985 | return -ENXIO; | |
986 | ||
987 | if (uuid) | |
988 | return sprintf(buf, "%pUb\n", uuid); | |
989 | return sprintf(buf, "\n"); | |
990 | } | |
991 | ||
992 | /** | |
993 | * namespace_update_uuid - check for a unique uuid and whether we're "renaming" | |
994 | * @nd_region: parent region so we can updates all dimms in the set | |
995 | * @dev: namespace type for generating label_id | |
996 | * @new_uuid: incoming uuid | |
997 | * @old_uuid: reference to the uuid storage location in the namespace object | |
998 | */ | |
999 | static int namespace_update_uuid(struct nd_region *nd_region, | |
1000 | struct device *dev, u8 *new_uuid, u8 **old_uuid) | |
1001 | { | |
1002 | u32 flags = is_namespace_blk(dev) ? NSLABEL_FLAG_LOCAL : 0; | |
1003 | struct nd_label_id old_label_id; | |
1004 | struct nd_label_id new_label_id; | |
f524bf27 | 1005 | int i; |
bf9bccc1 | 1006 | |
f524bf27 DW |
1007 | if (!nd_is_uuid_unique(dev, new_uuid)) |
1008 | return -EINVAL; | |
bf9bccc1 DW |
1009 | |
1010 | if (*old_uuid == NULL) | |
1011 | goto out; | |
1012 | ||
f524bf27 DW |
1013 | /* |
1014 | * If we've already written a label with this uuid, then it's | |
1015 | * too late to rename because we can't reliably update the uuid | |
1016 | * without losing the old namespace. Userspace must delete this | |
1017 | * namespace to abandon the old uuid. | |
1018 | */ | |
1019 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1020 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1021 | ||
1022 | /* | |
1023 | * This check by itself is sufficient because old_uuid | |
1024 | * would be NULL above if this uuid did not exist in the | |
1025 | * currently written set. | |
1026 | * | |
1027 | * FIXME: can we delete uuid with zero dpa allocated? | |
1028 | */ | |
1029 | if (nd_mapping->labels) | |
1030 | return -EBUSY; | |
1031 | } | |
1032 | ||
bf9bccc1 DW |
1033 | nd_label_gen_id(&old_label_id, *old_uuid, flags); |
1034 | nd_label_gen_id(&new_label_id, new_uuid, flags); | |
1035 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1036 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1037 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1038 | struct resource *res; | |
1039 | ||
1040 | for_each_dpa_resource(ndd, res) | |
1041 | if (strcmp(res->name, old_label_id.id) == 0) | |
1042 | sprintf((void *) res->name, "%s", | |
1043 | new_label_id.id); | |
1044 | } | |
1045 | kfree(*old_uuid); | |
1046 | out: | |
1047 | *old_uuid = new_uuid; | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static ssize_t uuid_store(struct device *dev, | |
1052 | struct device_attribute *attr, const char *buf, size_t len) | |
1053 | { | |
1054 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1055 | u8 *uuid = NULL; | |
8c2f7e86 | 1056 | ssize_t rc = 0; |
bf9bccc1 | 1057 | u8 **ns_uuid; |
bf9bccc1 DW |
1058 | |
1059 | if (is_namespace_pmem(dev)) { | |
1060 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1061 | ||
1062 | ns_uuid = &nspm->uuid; | |
1063 | } else if (is_namespace_blk(dev)) { | |
1b40e09a DW |
1064 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); |
1065 | ||
1066 | ns_uuid = &nsblk->uuid; | |
bf9bccc1 DW |
1067 | } else |
1068 | return -ENXIO; | |
1069 | ||
1070 | device_lock(dev); | |
1071 | nvdimm_bus_lock(dev); | |
1072 | wait_nvdimm_bus_probe_idle(dev); | |
8c2f7e86 DW |
1073 | if (to_ndns(dev)->claim) |
1074 | rc = -EBUSY; | |
1075 | if (rc >= 0) | |
1076 | rc = nd_uuid_store(dev, &uuid, buf, len); | |
bf9bccc1 DW |
1077 | if (rc >= 0) |
1078 | rc = namespace_update_uuid(nd_region, dev, uuid, ns_uuid); | |
f524bf27 DW |
1079 | if (rc >= 0) |
1080 | rc = nd_namespace_label_update(nd_region, dev); | |
1081 | else | |
1082 | kfree(uuid); | |
bf9bccc1 DW |
1083 | dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__, |
1084 | rc, buf, buf[len - 1] == '\n' ? "" : "\n"); | |
1085 | nvdimm_bus_unlock(dev); | |
1086 | device_unlock(dev); | |
1087 | ||
f524bf27 | 1088 | return rc < 0 ? rc : len; |
bf9bccc1 DW |
1089 | } |
1090 | static DEVICE_ATTR_RW(uuid); | |
1091 | ||
1092 | static ssize_t resource_show(struct device *dev, | |
1093 | struct device_attribute *attr, char *buf) | |
1094 | { | |
1095 | struct resource *res; | |
1096 | ||
1097 | if (is_namespace_pmem(dev)) { | |
1098 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1099 | ||
1100 | res = &nspm->nsio.res; | |
1101 | } else if (is_namespace_io(dev)) { | |
1102 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); | |
1103 | ||
1104 | res = &nsio->res; | |
1105 | } else | |
1106 | return -ENXIO; | |
1107 | ||
1108 | /* no address to convey if the namespace has no allocation */ | |
1109 | if (resource_size(res) == 0) | |
1110 | return -ENXIO; | |
1111 | return sprintf(buf, "%#llx\n", (unsigned long long) res->start); | |
1112 | } | |
1113 | static DEVICE_ATTR_RO(resource); | |
1114 | ||
fcae6957 VV |
1115 | static const unsigned long ns_lbasize_supported[] = { 512, 520, 528, |
1116 | 4096, 4104, 4160, 4224, 0 }; | |
1b40e09a DW |
1117 | |
1118 | static ssize_t sector_size_show(struct device *dev, | |
1119 | struct device_attribute *attr, char *buf) | |
1120 | { | |
1121 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1122 | ||
1123 | if (!is_namespace_blk(dev)) | |
1124 | return -ENXIO; | |
1125 | ||
1126 | return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf); | |
1127 | } | |
1128 | ||
1129 | static ssize_t sector_size_store(struct device *dev, | |
1130 | struct device_attribute *attr, const char *buf, size_t len) | |
1131 | { | |
1132 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
f524bf27 | 1133 | struct nd_region *nd_region = to_nd_region(dev->parent); |
8c2f7e86 | 1134 | ssize_t rc = 0; |
1b40e09a DW |
1135 | |
1136 | if (!is_namespace_blk(dev)) | |
1137 | return -ENXIO; | |
1138 | ||
1139 | device_lock(dev); | |
1140 | nvdimm_bus_lock(dev); | |
8c2f7e86 DW |
1141 | if (to_ndns(dev)->claim) |
1142 | rc = -EBUSY; | |
1143 | if (rc >= 0) | |
1144 | rc = nd_sector_size_store(dev, buf, &nsblk->lbasize, | |
1145 | ns_lbasize_supported); | |
f524bf27 DW |
1146 | if (rc >= 0) |
1147 | rc = nd_namespace_label_update(nd_region, dev); | |
1148 | dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__, | |
1149 | rc, rc < 0 ? "tried" : "wrote", buf, | |
1150 | buf[len - 1] == '\n' ? "" : "\n"); | |
1b40e09a DW |
1151 | nvdimm_bus_unlock(dev); |
1152 | device_unlock(dev); | |
1153 | ||
1154 | return rc ? rc : len; | |
1155 | } | |
1156 | static DEVICE_ATTR_RW(sector_size); | |
1157 | ||
0ba1c634 DW |
1158 | static ssize_t dpa_extents_show(struct device *dev, |
1159 | struct device_attribute *attr, char *buf) | |
1160 | { | |
1161 | struct nd_region *nd_region = to_nd_region(dev->parent); | |
1162 | struct nd_label_id label_id; | |
1163 | int count = 0, i; | |
1164 | u8 *uuid = NULL; | |
1165 | u32 flags = 0; | |
1166 | ||
1167 | nvdimm_bus_lock(dev); | |
1168 | if (is_namespace_pmem(dev)) { | |
1169 | struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); | |
1170 | ||
1171 | uuid = nspm->uuid; | |
1172 | flags = 0; | |
1173 | } else if (is_namespace_blk(dev)) { | |
1174 | struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); | |
1175 | ||
1176 | uuid = nsblk->uuid; | |
1177 | flags = NSLABEL_FLAG_LOCAL; | |
1178 | } | |
1179 | ||
1180 | if (!uuid) | |
1181 | goto out; | |
1182 | ||
1183 | nd_label_gen_id(&label_id, uuid, flags); | |
1184 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1185 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1186 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1187 | struct resource *res; | |
1188 | ||
1189 | for_each_dpa_resource(ndd, res) | |
1190 | if (strcmp(res->name, label_id.id) == 0) | |
1191 | count++; | |
1192 | } | |
1193 | out: | |
1194 | nvdimm_bus_unlock(dev); | |
1195 | ||
1196 | return sprintf(buf, "%d\n", count); | |
1197 | } | |
1198 | static DEVICE_ATTR_RO(dpa_extents); | |
1199 | ||
8c2f7e86 DW |
1200 | static ssize_t holder_show(struct device *dev, |
1201 | struct device_attribute *attr, char *buf) | |
1202 | { | |
1203 | struct nd_namespace_common *ndns = to_ndns(dev); | |
1204 | ssize_t rc; | |
1205 | ||
1206 | device_lock(dev); | |
1207 | rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : ""); | |
1208 | device_unlock(dev); | |
1209 | ||
1210 | return rc; | |
1211 | } | |
1212 | static DEVICE_ATTR_RO(holder); | |
1213 | ||
1214 | static ssize_t force_raw_store(struct device *dev, | |
1215 | struct device_attribute *attr, const char *buf, size_t len) | |
1216 | { | |
1217 | bool force_raw; | |
1218 | int rc = strtobool(buf, &force_raw); | |
1219 | ||
1220 | if (rc) | |
1221 | return rc; | |
1222 | ||
1223 | to_ndns(dev)->force_raw = force_raw; | |
1224 | return len; | |
1225 | } | |
1226 | ||
1227 | static ssize_t force_raw_show(struct device *dev, | |
1228 | struct device_attribute *attr, char *buf) | |
1229 | { | |
1230 | return sprintf(buf, "%d\n", to_ndns(dev)->force_raw); | |
1231 | } | |
1232 | static DEVICE_ATTR_RW(force_raw); | |
1233 | ||
3d88002e DW |
1234 | static struct attribute *nd_namespace_attributes[] = { |
1235 | &dev_attr_nstype.attr, | |
bf9bccc1 DW |
1236 | &dev_attr_size.attr, |
1237 | &dev_attr_uuid.attr, | |
8c2f7e86 | 1238 | &dev_attr_holder.attr, |
bf9bccc1 DW |
1239 | &dev_attr_resource.attr, |
1240 | &dev_attr_alt_name.attr, | |
8c2f7e86 | 1241 | &dev_attr_force_raw.attr, |
1b40e09a | 1242 | &dev_attr_sector_size.attr, |
0ba1c634 | 1243 | &dev_attr_dpa_extents.attr, |
3d88002e DW |
1244 | NULL, |
1245 | }; | |
1246 | ||
bf9bccc1 DW |
1247 | static umode_t namespace_visible(struct kobject *kobj, |
1248 | struct attribute *a, int n) | |
1249 | { | |
1250 | struct device *dev = container_of(kobj, struct device, kobj); | |
1251 | ||
1252 | if (a == &dev_attr_resource.attr) { | |
1253 | if (is_namespace_blk(dev)) | |
1254 | return 0; | |
1255 | return a->mode; | |
1256 | } | |
1257 | ||
1258 | if (is_namespace_pmem(dev) || is_namespace_blk(dev)) { | |
1259 | if (a == &dev_attr_size.attr) | |
1260 | return S_IWUSR | S_IRUGO; | |
1b40e09a DW |
1261 | |
1262 | if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr) | |
1263 | return 0; | |
1264 | ||
bf9bccc1 DW |
1265 | return a->mode; |
1266 | } | |
1267 | ||
8c2f7e86 DW |
1268 | if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr |
1269 | || a == &dev_attr_holder.attr | |
1270 | || a == &dev_attr_force_raw.attr) | |
bf9bccc1 DW |
1271 | return a->mode; |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
3d88002e DW |
1276 | static struct attribute_group nd_namespace_attribute_group = { |
1277 | .attrs = nd_namespace_attributes, | |
bf9bccc1 | 1278 | .is_visible = namespace_visible, |
3d88002e DW |
1279 | }; |
1280 | ||
1281 | static const struct attribute_group *nd_namespace_attribute_groups[] = { | |
1282 | &nd_device_attribute_group, | |
1283 | &nd_namespace_attribute_group, | |
74ae66c3 | 1284 | &nd_numa_attribute_group, |
3d88002e DW |
1285 | NULL, |
1286 | }; | |
1287 | ||
8c2f7e86 DW |
1288 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev) |
1289 | { | |
1290 | struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL; | |
e1455744 | 1291 | struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL; |
8c2f7e86 DW |
1292 | struct nd_namespace_common *ndns; |
1293 | resource_size_t size; | |
1294 | ||
e1455744 DW |
1295 | if (nd_btt || nd_pfn) { |
1296 | struct device *host = NULL; | |
1297 | ||
1298 | if (nd_btt) { | |
1299 | host = &nd_btt->dev; | |
1300 | ndns = nd_btt->ndns; | |
1301 | } else if (nd_pfn) { | |
1302 | host = &nd_pfn->dev; | |
1303 | ndns = nd_pfn->ndns; | |
1304 | } | |
1305 | ||
1306 | if (!ndns || !host) | |
8c2f7e86 DW |
1307 | return ERR_PTR(-ENODEV); |
1308 | ||
1309 | /* | |
1310 | * Flush any in-progess probes / removals in the driver | |
1311 | * for the raw personality of this namespace. | |
1312 | */ | |
1313 | device_lock(&ndns->dev); | |
1314 | device_unlock(&ndns->dev); | |
1315 | if (ndns->dev.driver) { | |
1316 | dev_dbg(&ndns->dev, "is active, can't bind %s\n", | |
e1455744 | 1317 | dev_name(host)); |
8c2f7e86 DW |
1318 | return ERR_PTR(-EBUSY); |
1319 | } | |
e1455744 | 1320 | if (dev_WARN_ONCE(&ndns->dev, ndns->claim != host, |
8c2f7e86 | 1321 | "host (%s) vs claim (%s) mismatch\n", |
e1455744 | 1322 | dev_name(host), |
8c2f7e86 DW |
1323 | dev_name(ndns->claim))) |
1324 | return ERR_PTR(-ENXIO); | |
1325 | } else { | |
1326 | ndns = to_ndns(dev); | |
1327 | if (ndns->claim) { | |
1328 | dev_dbg(dev, "claimed by %s, failing probe\n", | |
1329 | dev_name(ndns->claim)); | |
1330 | ||
1331 | return ERR_PTR(-ENXIO); | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | size = nvdimm_namespace_capacity(ndns); | |
1336 | if (size < ND_MIN_NAMESPACE_SIZE) { | |
1337 | dev_dbg(&ndns->dev, "%pa, too small must be at least %#x\n", | |
1338 | &size, ND_MIN_NAMESPACE_SIZE); | |
1339 | return ERR_PTR(-ENODEV); | |
1340 | } | |
1341 | ||
1342 | if (is_namespace_pmem(&ndns->dev)) { | |
1343 | struct nd_namespace_pmem *nspm; | |
1344 | ||
1345 | nspm = to_nd_namespace_pmem(&ndns->dev); | |
1346 | if (!nspm->uuid) { | |
1347 | dev_dbg(&ndns->dev, "%s: uuid not set\n", __func__); | |
1348 | return ERR_PTR(-ENODEV); | |
1349 | } | |
1350 | } else if (is_namespace_blk(&ndns->dev)) { | |
047fc8a1 RZ |
1351 | struct nd_namespace_blk *nsblk; |
1352 | ||
1353 | nsblk = to_nd_namespace_blk(&ndns->dev); | |
1354 | if (!nd_namespace_blk_validate(nsblk)) | |
1355 | return ERR_PTR(-ENODEV); | |
8c2f7e86 DW |
1356 | } |
1357 | ||
1358 | return ndns; | |
1359 | } | |
1360 | EXPORT_SYMBOL(nvdimm_namespace_common_probe); | |
1361 | ||
3d88002e DW |
1362 | static struct device **create_namespace_io(struct nd_region *nd_region) |
1363 | { | |
1364 | struct nd_namespace_io *nsio; | |
1365 | struct device *dev, **devs; | |
1366 | struct resource *res; | |
1367 | ||
1368 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); | |
1369 | if (!nsio) | |
1370 | return NULL; | |
1371 | ||
1372 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1373 | if (!devs) { | |
1374 | kfree(nsio); | |
1375 | return NULL; | |
1376 | } | |
1377 | ||
8c2f7e86 | 1378 | dev = &nsio->common.dev; |
3d88002e DW |
1379 | dev->type = &namespace_io_device_type; |
1380 | dev->parent = &nd_region->dev; | |
1381 | res = &nsio->res; | |
1382 | res->name = dev_name(&nd_region->dev); | |
1383 | res->flags = IORESOURCE_MEM; | |
1384 | res->start = nd_region->ndr_start; | |
1385 | res->end = res->start + nd_region->ndr_size - 1; | |
1386 | ||
1387 | devs[0] = dev; | |
1388 | return devs; | |
1389 | } | |
1390 | ||
bf9bccc1 DW |
1391 | static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, |
1392 | u64 cookie, u16 pos) | |
1393 | { | |
1394 | struct nd_namespace_label *found = NULL; | |
1395 | int i; | |
1396 | ||
1397 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1398 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1399 | struct nd_namespace_label *nd_label; | |
1400 | bool found_uuid = false; | |
1401 | int l; | |
1402 | ||
1403 | for_each_label(l, nd_label, nd_mapping->labels) { | |
1404 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1405 | u16 position = __le16_to_cpu(nd_label->position); | |
1406 | u16 nlabel = __le16_to_cpu(nd_label->nlabel); | |
1407 | ||
1408 | if (isetcookie != cookie) | |
1409 | continue; | |
1410 | ||
1411 | if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0) | |
1412 | continue; | |
1413 | ||
1414 | if (found_uuid) { | |
1415 | dev_dbg(to_ndd(nd_mapping)->dev, | |
1416 | "%s duplicate entry for uuid\n", | |
1417 | __func__); | |
1418 | return false; | |
1419 | } | |
1420 | found_uuid = true; | |
1421 | if (nlabel != nd_region->ndr_mappings) | |
1422 | continue; | |
1423 | if (position != pos) | |
1424 | continue; | |
1425 | found = nd_label; | |
1426 | break; | |
1427 | } | |
1428 | if (found) | |
1429 | break; | |
1430 | } | |
1431 | return found != NULL; | |
1432 | } | |
1433 | ||
1434 | static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) | |
1435 | { | |
1436 | struct nd_namespace_label *select = NULL; | |
1437 | int i; | |
1438 | ||
1439 | if (!pmem_id) | |
1440 | return -ENODEV; | |
1441 | ||
1442 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1443 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1444 | struct nd_namespace_label *nd_label; | |
1445 | u64 hw_start, hw_end, pmem_start, pmem_end; | |
1446 | int l; | |
1447 | ||
1448 | for_each_label(l, nd_label, nd_mapping->labels) | |
1449 | if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) | |
1450 | break; | |
1451 | ||
1452 | if (!nd_label) { | |
1453 | WARN_ON(1); | |
1454 | return -EINVAL; | |
1455 | } | |
1456 | ||
1457 | select = nd_label; | |
1458 | /* | |
1459 | * Check that this label is compliant with the dpa | |
1460 | * range published in NFIT | |
1461 | */ | |
1462 | hw_start = nd_mapping->start; | |
1463 | hw_end = hw_start + nd_mapping->size; | |
1464 | pmem_start = __le64_to_cpu(select->dpa); | |
1465 | pmem_end = pmem_start + __le64_to_cpu(select->rawsize); | |
1466 | if (pmem_start == hw_start && pmem_end <= hw_end) | |
1467 | /* pass */; | |
1468 | else | |
1469 | return -EINVAL; | |
1470 | ||
1471 | nd_mapping->labels[0] = select; | |
1472 | nd_mapping->labels[1] = NULL; | |
1473 | } | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | /** | |
1478 | * find_pmem_label_set - validate interleave set labelling, retrieve label0 | |
1479 | * @nd_region: region with mappings to validate | |
1480 | */ | |
1481 | static int find_pmem_label_set(struct nd_region *nd_region, | |
1482 | struct nd_namespace_pmem *nspm) | |
1483 | { | |
1484 | u64 cookie = nd_region_interleave_set_cookie(nd_region); | |
1485 | struct nd_namespace_label *nd_label; | |
1486 | u8 select_id[NSLABEL_UUID_LEN]; | |
1487 | resource_size_t size = 0; | |
1488 | u8 *pmem_id = NULL; | |
1489 | int rc = -ENODEV, l; | |
1490 | u16 i; | |
1491 | ||
1492 | if (cookie == 0) | |
1493 | return -ENXIO; | |
1494 | ||
1495 | /* | |
1496 | * Find a complete set of labels by uuid. By definition we can start | |
1497 | * with any mapping as the reference label | |
1498 | */ | |
1499 | for_each_label(l, nd_label, nd_region->mapping[0].labels) { | |
1500 | u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); | |
1501 | ||
1502 | if (isetcookie != cookie) | |
1503 | continue; | |
1504 | ||
1505 | for (i = 0; nd_region->ndr_mappings; i++) | |
1506 | if (!has_uuid_at_pos(nd_region, nd_label->uuid, | |
1507 | cookie, i)) | |
1508 | break; | |
1509 | if (i < nd_region->ndr_mappings) { | |
1510 | /* | |
1511 | * Give up if we don't find an instance of a | |
1512 | * uuid at each position (from 0 to | |
1513 | * nd_region->ndr_mappings - 1), or if we find a | |
1514 | * dimm with two instances of the same uuid. | |
1515 | */ | |
1516 | rc = -EINVAL; | |
1517 | goto err; | |
1518 | } else if (pmem_id) { | |
1519 | /* | |
1520 | * If there is more than one valid uuid set, we | |
1521 | * need userspace to clean this up. | |
1522 | */ | |
1523 | rc = -EBUSY; | |
1524 | goto err; | |
1525 | } | |
1526 | memcpy(select_id, nd_label->uuid, NSLABEL_UUID_LEN); | |
1527 | pmem_id = select_id; | |
1528 | } | |
1529 | ||
1530 | /* | |
1531 | * Fix up each mapping's 'labels' to have the validated pmem label for | |
1532 | * that position at labels[0], and NULL at labels[1]. In the process, | |
1533 | * check that the namespace aligns with interleave-set. We know | |
1534 | * that it does not overlap with any blk namespaces by virtue of | |
1535 | * the dimm being enabled (i.e. nd_label_reserve_dpa() | |
1536 | * succeeded). | |
1537 | */ | |
1538 | rc = select_pmem_id(nd_region, pmem_id); | |
1539 | if (rc) | |
1540 | goto err; | |
1541 | ||
1542 | /* Calculate total size and populate namespace properties from label0 */ | |
1543 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1544 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1545 | struct nd_namespace_label *label0 = nd_mapping->labels[0]; | |
1546 | ||
1547 | size += __le64_to_cpu(label0->rawsize); | |
1548 | if (__le16_to_cpu(label0->position) != 0) | |
1549 | continue; | |
1550 | WARN_ON(nspm->alt_name || nspm->uuid); | |
1551 | nspm->alt_name = kmemdup((void __force *) label0->name, | |
1552 | NSLABEL_NAME_LEN, GFP_KERNEL); | |
1553 | nspm->uuid = kmemdup((void __force *) label0->uuid, | |
1554 | NSLABEL_UUID_LEN, GFP_KERNEL); | |
1555 | } | |
1556 | ||
1557 | if (!nspm->alt_name || !nspm->uuid) { | |
1558 | rc = -ENOMEM; | |
1559 | goto err; | |
1560 | } | |
1561 | ||
1562 | nd_namespace_pmem_set_size(nd_region, nspm, size); | |
1563 | ||
1564 | return 0; | |
1565 | err: | |
1566 | switch (rc) { | |
1567 | case -EINVAL: | |
1568 | dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__); | |
1569 | break; | |
1570 | case -ENODEV: | |
1571 | dev_dbg(&nd_region->dev, "%s: label not found\n", __func__); | |
1572 | break; | |
1573 | default: | |
1574 | dev_dbg(&nd_region->dev, "%s: unexpected err: %d\n", | |
1575 | __func__, rc); | |
1576 | break; | |
1577 | } | |
1578 | return rc; | |
1579 | } | |
1580 | ||
1581 | static struct device **create_namespace_pmem(struct nd_region *nd_region) | |
1582 | { | |
1583 | struct nd_namespace_pmem *nspm; | |
1584 | struct device *dev, **devs; | |
1585 | struct resource *res; | |
1586 | int rc; | |
1587 | ||
1588 | nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); | |
1589 | if (!nspm) | |
1590 | return NULL; | |
1591 | ||
8c2f7e86 | 1592 | dev = &nspm->nsio.common.dev; |
bf9bccc1 DW |
1593 | dev->type = &namespace_pmem_device_type; |
1594 | dev->parent = &nd_region->dev; | |
1595 | res = &nspm->nsio.res; | |
1596 | res->name = dev_name(&nd_region->dev); | |
1597 | res->flags = IORESOURCE_MEM; | |
1598 | rc = find_pmem_label_set(nd_region, nspm); | |
1599 | if (rc == -ENODEV) { | |
1600 | int i; | |
1601 | ||
1602 | /* Pass, try to permit namespace creation... */ | |
1603 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1604 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1605 | ||
1606 | kfree(nd_mapping->labels); | |
1607 | nd_mapping->labels = NULL; | |
1608 | } | |
1609 | ||
1610 | /* Publish a zero-sized namespace for userspace to configure. */ | |
1611 | nd_namespace_pmem_set_size(nd_region, nspm, 0); | |
1612 | ||
1613 | rc = 0; | |
1614 | } else if (rc) | |
1615 | goto err; | |
1616 | ||
1617 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); | |
1618 | if (!devs) | |
1619 | goto err; | |
1620 | ||
1621 | devs[0] = dev; | |
1622 | return devs; | |
1623 | ||
1624 | err: | |
8c2f7e86 | 1625 | namespace_pmem_release(&nspm->nsio.common.dev); |
bf9bccc1 DW |
1626 | return NULL; |
1627 | } | |
1628 | ||
1b40e09a DW |
1629 | struct resource *nsblk_add_resource(struct nd_region *nd_region, |
1630 | struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, | |
1631 | resource_size_t start) | |
1632 | { | |
1633 | struct nd_label_id label_id; | |
1634 | struct resource *res; | |
1635 | ||
1636 | nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); | |
1637 | res = krealloc(nsblk->res, | |
1638 | sizeof(void *) * (nsblk->num_resources + 1), | |
1639 | GFP_KERNEL); | |
1640 | if (!res) | |
1641 | return NULL; | |
1642 | nsblk->res = (struct resource **) res; | |
1643 | for_each_dpa_resource(ndd, res) | |
1644 | if (strcmp(res->name, label_id.id) == 0 | |
1645 | && res->start == start) { | |
1646 | nsblk->res[nsblk->num_resources++] = res; | |
1647 | return res; | |
1648 | } | |
1649 | return NULL; | |
1650 | } | |
1651 | ||
1652 | static struct device *nd_namespace_blk_create(struct nd_region *nd_region) | |
1653 | { | |
1654 | struct nd_namespace_blk *nsblk; | |
1655 | struct device *dev; | |
1656 | ||
1657 | if (!is_nd_blk(&nd_region->dev)) | |
1658 | return NULL; | |
1659 | ||
1660 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1661 | if (!nsblk) | |
1662 | return NULL; | |
1663 | ||
8c2f7e86 | 1664 | dev = &nsblk->common.dev; |
1b40e09a DW |
1665 | dev->type = &namespace_blk_device_type; |
1666 | nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); | |
1667 | if (nsblk->id < 0) { | |
1668 | kfree(nsblk); | |
1669 | return NULL; | |
1670 | } | |
1671 | dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); | |
1672 | dev->parent = &nd_region->dev; | |
1673 | dev->groups = nd_namespace_attribute_groups; | |
1674 | ||
8c2f7e86 | 1675 | return &nsblk->common.dev; |
1b40e09a DW |
1676 | } |
1677 | ||
1678 | void nd_region_create_blk_seed(struct nd_region *nd_region) | |
1679 | { | |
1680 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1681 | nd_region->ns_seed = nd_namespace_blk_create(nd_region); | |
1682 | /* | |
1683 | * Seed creation failures are not fatal, provisioning is simply | |
1684 | * disabled until memory becomes available | |
1685 | */ | |
1686 | if (!nd_region->ns_seed) | |
1687 | dev_err(&nd_region->dev, "failed to create blk namespace\n"); | |
1688 | else | |
1689 | nd_device_register(nd_region->ns_seed); | |
1690 | } | |
1691 | ||
8c2f7e86 DW |
1692 | void nd_region_create_btt_seed(struct nd_region *nd_region) |
1693 | { | |
1694 | WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); | |
1695 | nd_region->btt_seed = nd_btt_create(nd_region); | |
1696 | /* | |
1697 | * Seed creation failures are not fatal, provisioning is simply | |
1698 | * disabled until memory becomes available | |
1699 | */ | |
1700 | if (!nd_region->btt_seed) | |
1701 | dev_err(&nd_region->dev, "failed to create btt namespace\n"); | |
1702 | } | |
1703 | ||
1b40e09a DW |
1704 | static struct device **create_namespace_blk(struct nd_region *nd_region) |
1705 | { | |
1706 | struct nd_mapping *nd_mapping = &nd_region->mapping[0]; | |
1707 | struct nd_namespace_label *nd_label; | |
1708 | struct device *dev, **devs = NULL; | |
1709 | struct nd_namespace_blk *nsblk; | |
1710 | struct nvdimm_drvdata *ndd; | |
1711 | int i, l, count = 0; | |
1712 | struct resource *res; | |
1713 | ||
1714 | if (nd_region->ndr_mappings == 0) | |
1715 | return NULL; | |
1716 | ||
1717 | ndd = to_ndd(nd_mapping); | |
1718 | for_each_label(l, nd_label, nd_mapping->labels) { | |
1719 | u32 flags = __le32_to_cpu(nd_label->flags); | |
1720 | char *name[NSLABEL_NAME_LEN]; | |
1721 | struct device **__devs; | |
1722 | ||
1723 | if (flags & NSLABEL_FLAG_LOCAL) | |
1724 | /* pass */; | |
1725 | else | |
1726 | continue; | |
1727 | ||
1728 | for (i = 0; i < count; i++) { | |
1729 | nsblk = to_nd_namespace_blk(devs[i]); | |
1730 | if (memcmp(nsblk->uuid, nd_label->uuid, | |
1731 | NSLABEL_UUID_LEN) == 0) { | |
1732 | res = nsblk_add_resource(nd_region, ndd, nsblk, | |
1733 | __le64_to_cpu(nd_label->dpa)); | |
1734 | if (!res) | |
1735 | goto err; | |
1736 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", | |
8c2f7e86 | 1737 | dev_name(&nsblk->common.dev)); |
1b40e09a DW |
1738 | break; |
1739 | } | |
1740 | } | |
1741 | if (i < count) | |
1742 | continue; | |
1743 | __devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL); | |
1744 | if (!__devs) | |
1745 | goto err; | |
1746 | memcpy(__devs, devs, sizeof(dev) * count); | |
1747 | kfree(devs); | |
1748 | devs = __devs; | |
1749 | ||
1750 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1751 | if (!nsblk) | |
1752 | goto err; | |
8c2f7e86 | 1753 | dev = &nsblk->common.dev; |
1b40e09a DW |
1754 | dev->type = &namespace_blk_device_type; |
1755 | dev->parent = &nd_region->dev; | |
1756 | dev_set_name(dev, "namespace%d.%d", nd_region->id, count); | |
1757 | devs[count++] = dev; | |
1758 | nsblk->id = -1; | |
1759 | nsblk->lbasize = __le64_to_cpu(nd_label->lbasize); | |
1760 | nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN, | |
1761 | GFP_KERNEL); | |
1762 | if (!nsblk->uuid) | |
1763 | goto err; | |
1764 | memcpy(name, nd_label->name, NSLABEL_NAME_LEN); | |
1765 | if (name[0]) | |
1766 | nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, | |
1767 | GFP_KERNEL); | |
1768 | res = nsblk_add_resource(nd_region, ndd, nsblk, | |
1769 | __le64_to_cpu(nd_label->dpa)); | |
1770 | if (!res) | |
1771 | goto err; | |
1772 | nd_dbg_dpa(nd_region, ndd, res, "%s assign\n", | |
8c2f7e86 | 1773 | dev_name(&nsblk->common.dev)); |
1b40e09a DW |
1774 | } |
1775 | ||
1776 | dev_dbg(&nd_region->dev, "%s: discovered %d blk namespace%s\n", | |
1777 | __func__, count, count == 1 ? "" : "s"); | |
1778 | ||
1779 | if (count == 0) { | |
1780 | /* Publish a zero-sized namespace for userspace to configure. */ | |
1781 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1782 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1783 | ||
1784 | kfree(nd_mapping->labels); | |
1785 | nd_mapping->labels = NULL; | |
1786 | } | |
1787 | ||
1788 | devs = kcalloc(2, sizeof(dev), GFP_KERNEL); | |
1789 | if (!devs) | |
1790 | goto err; | |
1791 | nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); | |
1792 | if (!nsblk) | |
1793 | goto err; | |
8c2f7e86 | 1794 | dev = &nsblk->common.dev; |
1b40e09a DW |
1795 | dev->type = &namespace_blk_device_type; |
1796 | dev->parent = &nd_region->dev; | |
1797 | devs[count++] = dev; | |
1798 | } | |
1799 | ||
1800 | return devs; | |
1801 | ||
1802 | err: | |
1803 | for (i = 0; i < count; i++) { | |
1804 | nsblk = to_nd_namespace_blk(devs[i]); | |
8c2f7e86 | 1805 | namespace_blk_release(&nsblk->common.dev); |
1b40e09a DW |
1806 | } |
1807 | kfree(devs); | |
1808 | return NULL; | |
1809 | } | |
1810 | ||
bf9bccc1 DW |
1811 | static int init_active_labels(struct nd_region *nd_region) |
1812 | { | |
1813 | int i; | |
1814 | ||
1815 | for (i = 0; i < nd_region->ndr_mappings; i++) { | |
1816 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; | |
1817 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); | |
1818 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
1819 | int count, j; | |
1820 | ||
1821 | /* | |
1822 | * If the dimm is disabled then prevent the region from | |
1823 | * being activated if it aliases DPA. | |
1824 | */ | |
1825 | if (!ndd) { | |
1826 | if ((nvdimm->flags & NDD_ALIASING) == 0) | |
1827 | return 0; | |
1828 | dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", | |
1829 | dev_name(&nd_mapping->nvdimm->dev)); | |
1830 | return -ENXIO; | |
1831 | } | |
1832 | nd_mapping->ndd = ndd; | |
1833 | atomic_inc(&nvdimm->busy); | |
1834 | get_ndd(ndd); | |
1835 | ||
1836 | count = nd_label_active_count(ndd); | |
1837 | dev_dbg(ndd->dev, "%s: %d\n", __func__, count); | |
1838 | if (!count) | |
1839 | continue; | |
1840 | nd_mapping->labels = kcalloc(count + 1, sizeof(void *), | |
1841 | GFP_KERNEL); | |
1842 | if (!nd_mapping->labels) | |
1843 | return -ENOMEM; | |
1844 | for (j = 0; j < count; j++) { | |
1845 | struct nd_namespace_label *label; | |
1846 | ||
1847 | label = nd_label_active(ndd, j); | |
1848 | nd_mapping->labels[j] = label; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | return 0; | |
1853 | } | |
1854 | ||
3d88002e DW |
1855 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
1856 | { | |
1857 | struct device **devs = NULL; | |
bf9bccc1 | 1858 | int i, rc = 0, type; |
3d88002e DW |
1859 | |
1860 | *err = 0; | |
bf9bccc1 DW |
1861 | nvdimm_bus_lock(&nd_region->dev); |
1862 | rc = init_active_labels(nd_region); | |
1863 | if (rc) { | |
1864 | nvdimm_bus_unlock(&nd_region->dev); | |
1865 | return rc; | |
1866 | } | |
1867 | ||
1868 | type = nd_region_to_nstype(nd_region); | |
1869 | switch (type) { | |
3d88002e DW |
1870 | case ND_DEVICE_NAMESPACE_IO: |
1871 | devs = create_namespace_io(nd_region); | |
1872 | break; | |
bf9bccc1 DW |
1873 | case ND_DEVICE_NAMESPACE_PMEM: |
1874 | devs = create_namespace_pmem(nd_region); | |
1875 | break; | |
1b40e09a DW |
1876 | case ND_DEVICE_NAMESPACE_BLK: |
1877 | devs = create_namespace_blk(nd_region); | |
1878 | break; | |
3d88002e DW |
1879 | default: |
1880 | break; | |
1881 | } | |
bf9bccc1 | 1882 | nvdimm_bus_unlock(&nd_region->dev); |
3d88002e DW |
1883 | |
1884 | if (!devs) | |
1885 | return -ENODEV; | |
1886 | ||
1887 | for (i = 0; devs[i]; i++) { | |
1888 | struct device *dev = devs[i]; | |
1b40e09a | 1889 | int id; |
3d88002e | 1890 | |
1b40e09a DW |
1891 | if (type == ND_DEVICE_NAMESPACE_BLK) { |
1892 | struct nd_namespace_blk *nsblk; | |
1893 | ||
1894 | nsblk = to_nd_namespace_blk(dev); | |
1895 | id = ida_simple_get(&nd_region->ns_ida, 0, 0, | |
1896 | GFP_KERNEL); | |
1897 | nsblk->id = id; | |
1898 | } else | |
1899 | id = i; | |
1900 | ||
1901 | if (id < 0) | |
1902 | break; | |
1903 | dev_set_name(dev, "namespace%d.%d", nd_region->id, id); | |
3d88002e DW |
1904 | dev->groups = nd_namespace_attribute_groups; |
1905 | nd_device_register(dev); | |
1906 | } | |
1b40e09a DW |
1907 | if (i) |
1908 | nd_region->ns_seed = devs[0]; | |
1909 | ||
1910 | if (devs[i]) { | |
1911 | int j; | |
1912 | ||
1913 | for (j = i; devs[j]; j++) { | |
1914 | struct device *dev = devs[j]; | |
1915 | ||
1916 | device_initialize(dev); | |
1917 | put_device(dev); | |
1918 | } | |
1919 | *err = j - i; | |
1920 | /* | |
1921 | * All of the namespaces we tried to register failed, so | |
1922 | * fail region activation. | |
1923 | */ | |
1924 | if (*err == 0) | |
1925 | rc = -ENODEV; | |
1926 | } | |
3d88002e DW |
1927 | kfree(devs); |
1928 | ||
1b40e09a DW |
1929 | if (rc == -ENODEV) |
1930 | return rc; | |
1931 | ||
3d88002e DW |
1932 | return i; |
1933 | } |