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