1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
4 | */ |
5 | #include <linux/device.h> |
6 | #include <linux/ndctl.h> |
7 | #include <linux/uuid.h> |
8 | #include <linux/slab.h> |
9 | #include <linux/io.h> |
10 | #include <linux/nd.h> |
11 | #include "nd-core.h" |
12 | #include "label.h" |
13 | #include "nd.h" |
14 | |
15 | static guid_t nvdimm_btt_guid; |
16 | static guid_t nvdimm_btt2_guid; |
17 | static guid_t nvdimm_pfn_guid; |
18 | static guid_t nvdimm_dax_guid; |
19 | |
20 | static uuid_t nvdimm_btt_uuid; |
21 | static uuid_t nvdimm_btt2_uuid; |
22 | static uuid_t nvdimm_pfn_uuid; |
23 | static uuid_t nvdimm_dax_uuid; |
24 | |
25 | static uuid_t cxl_region_uuid; |
26 | static uuid_t cxl_namespace_uuid; |
27 | |
28 | static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0" ; |
29 | |
30 | static u32 best_seq(u32 a, u32 b) |
31 | { |
32 | a &= NSINDEX_SEQ_MASK; |
33 | b &= NSINDEX_SEQ_MASK; |
34 | |
35 | if (a == 0 || a == b) |
36 | return b; |
37 | else if (b == 0) |
38 | return a; |
39 | else if (nd_inc_seq(seq: a) == b) |
40 | return b; |
41 | else |
42 | return a; |
43 | } |
44 | |
45 | unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) |
46 | { |
47 | return ndd->nslabel_size; |
48 | } |
49 | |
50 | static size_t __sizeof_namespace_index(u32 nslot) |
51 | { |
52 | return ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), |
53 | NSINDEX_ALIGN); |
54 | } |
55 | |
56 | static int __nvdimm_num_label_slots(struct nvdimm_drvdata *ndd, |
57 | size_t index_size) |
58 | { |
59 | return (ndd->nsarea.config_size - index_size * 2) / |
60 | sizeof_namespace_label(ndd); |
61 | } |
62 | |
63 | int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) |
64 | { |
65 | u32 tmp_nslot, n; |
66 | |
67 | tmp_nslot = ndd->nsarea.config_size / sizeof_namespace_label(ndd); |
68 | n = __sizeof_namespace_index(nslot: tmp_nslot) / NSINDEX_ALIGN; |
69 | |
70 | return __nvdimm_num_label_slots(ndd, index_size: NSINDEX_ALIGN * n); |
71 | } |
72 | |
73 | size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) |
74 | { |
75 | u32 nslot, space, size; |
76 | |
77 | /* |
78 | * Per UEFI 2.7, the minimum size of the Label Storage Area is large |
79 | * enough to hold 2 index blocks and 2 labels. The minimum index |
80 | * block size is 256 bytes. The label size is 128 for namespaces |
81 | * prior to version 1.2 and at minimum 256 for version 1.2 and later. |
82 | */ |
83 | nslot = nvdimm_num_label_slots(ndd); |
84 | space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); |
85 | size = __sizeof_namespace_index(nslot) * 2; |
86 | if (size <= space && nslot >= 2) |
87 | return size / 2; |
88 | |
89 | dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n" , |
90 | ndd->nsarea.config_size, sizeof_namespace_label(ndd)); |
91 | return 0; |
92 | } |
93 | |
94 | static int __nd_label_validate(struct nvdimm_drvdata *ndd) |
95 | { |
96 | /* |
97 | * On media label format consists of two index blocks followed |
98 | * by an array of labels. None of these structures are ever |
99 | * updated in place. A sequence number tracks the current |
100 | * active index and the next one to write, while labels are |
101 | * written to free slots. |
102 | * |
103 | * +------------+ |
104 | * | | |
105 | * | nsindex0 | |
106 | * | | |
107 | * +------------+ |
108 | * | | |
109 | * | nsindex1 | |
110 | * | | |
111 | * +------------+ |
112 | * | label0 | |
113 | * +------------+ |
114 | * | label1 | |
115 | * +------------+ |
116 | * | | |
117 | * ....nslot... |
118 | * | | |
119 | * +------------+ |
120 | * | labelN | |
121 | * +------------+ |
122 | */ |
123 | struct nd_namespace_index *nsindex[] = { |
124 | to_namespace_index(ndd, i: 0), |
125 | to_namespace_index(ndd, i: 1), |
126 | }; |
127 | const int num_index = ARRAY_SIZE(nsindex); |
128 | struct device *dev = ndd->dev; |
129 | bool valid[2] = { 0 }; |
130 | int i, num_valid = 0; |
131 | u32 seq; |
132 | |
133 | for (i = 0; i < num_index; i++) { |
134 | u32 nslot; |
135 | u8 sig[NSINDEX_SIG_LEN]; |
136 | u64 sum_save, sum, size; |
137 | unsigned int version, labelsize; |
138 | |
139 | memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); |
140 | if (memcmp(p: sig, q: NSINDEX_SIGNATURE, size: NSINDEX_SIG_LEN) != 0) { |
141 | dev_dbg(dev, "nsindex%d signature invalid\n" , i); |
142 | continue; |
143 | } |
144 | |
145 | /* label sizes larger than 128 arrived with v1.2 */ |
146 | version = __le16_to_cpu(nsindex[i]->major) * 100 |
147 | + __le16_to_cpu(nsindex[i]->minor); |
148 | if (version >= 102) |
149 | labelsize = 1 << (7 + nsindex[i]->labelsize); |
150 | else |
151 | labelsize = 128; |
152 | |
153 | if (labelsize != sizeof_namespace_label(ndd)) { |
154 | dev_dbg(dev, "nsindex%d labelsize %d invalid\n" , |
155 | i, nsindex[i]->labelsize); |
156 | continue; |
157 | } |
158 | |
159 | sum_save = __le64_to_cpu(nsindex[i]->checksum); |
160 | nsindex[i]->checksum = __cpu_to_le64(0); |
161 | sum = nd_fletcher64(addr: nsindex[i], len: sizeof_namespace_index(ndd), le: 1); |
162 | nsindex[i]->checksum = __cpu_to_le64(sum_save); |
163 | if (sum != sum_save) { |
164 | dev_dbg(dev, "nsindex%d checksum invalid\n" , i); |
165 | continue; |
166 | } |
167 | |
168 | seq = __le32_to_cpu(nsindex[i]->seq); |
169 | if ((seq & NSINDEX_SEQ_MASK) == 0) { |
170 | dev_dbg(dev, "nsindex%d sequence: %#x invalid\n" , i, seq); |
171 | continue; |
172 | } |
173 | |
174 | /* sanity check the index against expected values */ |
175 | if (__le64_to_cpu(nsindex[i]->myoff) |
176 | != i * sizeof_namespace_index(ndd)) { |
177 | dev_dbg(dev, "nsindex%d myoff: %#llx invalid\n" , |
178 | i, (unsigned long long) |
179 | __le64_to_cpu(nsindex[i]->myoff)); |
180 | continue; |
181 | } |
182 | if (__le64_to_cpu(nsindex[i]->otheroff) |
183 | != (!i) * sizeof_namespace_index(ndd)) { |
184 | dev_dbg(dev, "nsindex%d otheroff: %#llx invalid\n" , |
185 | i, (unsigned long long) |
186 | __le64_to_cpu(nsindex[i]->otheroff)); |
187 | continue; |
188 | } |
189 | if (__le64_to_cpu(nsindex[i]->labeloff) |
190 | != 2 * sizeof_namespace_index(ndd)) { |
191 | dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n" , |
192 | i, (unsigned long long) |
193 | __le64_to_cpu(nsindex[i]->labeloff)); |
194 | continue; |
195 | } |
196 | |
197 | size = __le64_to_cpu(nsindex[i]->mysize); |
198 | if (size > sizeof_namespace_index(ndd) |
199 | || size < sizeof(struct nd_namespace_index)) { |
200 | dev_dbg(dev, "nsindex%d mysize: %#llx invalid\n" , i, size); |
201 | continue; |
202 | } |
203 | |
204 | nslot = __le32_to_cpu(nsindex[i]->nslot); |
205 | if (nslot * sizeof_namespace_label(ndd) |
206 | + 2 * sizeof_namespace_index(ndd) |
207 | > ndd->nsarea.config_size) { |
208 | dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n" , |
209 | i, nslot, ndd->nsarea.config_size); |
210 | continue; |
211 | } |
212 | valid[i] = true; |
213 | num_valid++; |
214 | } |
215 | |
216 | switch (num_valid) { |
217 | case 0: |
218 | break; |
219 | case 1: |
220 | for (i = 0; i < num_index; i++) |
221 | if (valid[i]) |
222 | return i; |
223 | /* can't have num_valid > 0 but valid[] = { false, false } */ |
224 | WARN_ON(1); |
225 | break; |
226 | default: |
227 | /* pick the best index... */ |
228 | seq = best_seq(__le32_to_cpu(nsindex[0]->seq), |
229 | __le32_to_cpu(nsindex[1]->seq)); |
230 | if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) |
231 | return 1; |
232 | else |
233 | return 0; |
234 | break; |
235 | } |
236 | |
237 | return -1; |
238 | } |
239 | |
240 | static int nd_label_validate(struct nvdimm_drvdata *ndd) |
241 | { |
242 | /* |
243 | * In order to probe for and validate namespace index blocks we |
244 | * need to know the size of the labels, and we can't trust the |
245 | * size of the labels until we validate the index blocks. |
246 | * Resolve this dependency loop by probing for known label |
247 | * sizes, but default to v1.2 256-byte namespace labels if |
248 | * discovery fails. |
249 | */ |
250 | int label_size[] = { 128, 256 }; |
251 | int i, rc; |
252 | |
253 | for (i = 0; i < ARRAY_SIZE(label_size); i++) { |
254 | ndd->nslabel_size = label_size[i]; |
255 | rc = __nd_label_validate(ndd); |
256 | if (rc >= 0) |
257 | return rc; |
258 | } |
259 | |
260 | return -1; |
261 | } |
262 | |
263 | static void nd_label_copy(struct nvdimm_drvdata *ndd, |
264 | struct nd_namespace_index *dst, |
265 | struct nd_namespace_index *src) |
266 | { |
267 | /* just exit if either destination or source is NULL */ |
268 | if (!dst || !src) |
269 | return; |
270 | |
271 | memcpy(dst, src, sizeof_namespace_index(ndd)); |
272 | } |
273 | |
274 | static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) |
275 | { |
276 | void *base = to_namespace_index(ndd, i: 0); |
277 | |
278 | return base + 2 * sizeof_namespace_index(ndd); |
279 | } |
280 | |
281 | static int to_slot(struct nvdimm_drvdata *ndd, |
282 | struct nd_namespace_label *nd_label) |
283 | { |
284 | unsigned long label, base; |
285 | |
286 | label = (unsigned long) nd_label; |
287 | base = (unsigned long) nd_label_base(ndd); |
288 | |
289 | return (label - base) / sizeof_namespace_label(ndd); |
290 | } |
291 | |
292 | static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) |
293 | { |
294 | unsigned long label, base; |
295 | |
296 | base = (unsigned long) nd_label_base(ndd); |
297 | label = base + sizeof_namespace_label(ndd) * slot; |
298 | |
299 | return (struct nd_namespace_label *) label; |
300 | } |
301 | |
302 | #define for_each_clear_bit_le(bit, addr, size) \ |
303 | for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ |
304 | (bit) < (size); \ |
305 | (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) |
306 | |
307 | /** |
308 | * preamble_index - common variable initialization for nd_label_* routines |
309 | * @ndd: dimm container for the relevant label set |
310 | * @idx: namespace_index index |
311 | * @nsindex_out: on return set to the currently active namespace index |
312 | * @free: on return set to the free label bitmap in the index |
313 | * @nslot: on return set to the number of slots in the label space |
314 | */ |
315 | static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, |
316 | struct nd_namespace_index **nsindex_out, |
317 | unsigned long **free, u32 *nslot) |
318 | { |
319 | struct nd_namespace_index *nsindex; |
320 | |
321 | nsindex = to_namespace_index(ndd, i: idx); |
322 | if (nsindex == NULL) |
323 | return false; |
324 | |
325 | *free = (unsigned long *) nsindex->free; |
326 | *nslot = __le32_to_cpu(nsindex->nslot); |
327 | *nsindex_out = nsindex; |
328 | |
329 | return true; |
330 | } |
331 | |
332 | char *nd_label_gen_id(struct nd_label_id *label_id, const uuid_t *uuid, |
333 | u32 flags) |
334 | { |
335 | if (!label_id || !uuid) |
336 | return NULL; |
337 | snprintf(buf: label_id->id, size: ND_LABEL_ID_SIZE, fmt: "pmem-%pUb" , uuid); |
338 | return label_id->id; |
339 | } |
340 | |
341 | static bool preamble_current(struct nvdimm_drvdata *ndd, |
342 | struct nd_namespace_index **nsindex, |
343 | unsigned long **free, u32 *nslot) |
344 | { |
345 | return preamble_index(ndd, idx: ndd->ns_current, nsindex_out: nsindex, |
346 | free, nslot); |
347 | } |
348 | |
349 | static bool preamble_next(struct nvdimm_drvdata *ndd, |
350 | struct nd_namespace_index **nsindex, |
351 | unsigned long **free, u32 *nslot) |
352 | { |
353 | return preamble_index(ndd, idx: ndd->ns_next, nsindex_out: nsindex, |
354 | free, nslot); |
355 | } |
356 | |
357 | static bool nsl_validate_checksum(struct nvdimm_drvdata *ndd, |
358 | struct nd_namespace_label *nd_label) |
359 | { |
360 | u64 sum, sum_save; |
361 | |
362 | if (!ndd->cxl && !efi_namespace_label_has(ndd, checksum)) |
363 | return true; |
364 | |
365 | sum_save = nsl_get_checksum(ndd, nd_label); |
366 | nsl_set_checksum(ndd, nd_label, checksum: 0); |
367 | sum = nd_fletcher64(addr: nd_label, len: sizeof_namespace_label(ndd), le: 1); |
368 | nsl_set_checksum(ndd, nd_label, checksum: sum_save); |
369 | return sum == sum_save; |
370 | } |
371 | |
372 | static void nsl_calculate_checksum(struct nvdimm_drvdata *ndd, |
373 | struct nd_namespace_label *nd_label) |
374 | { |
375 | u64 sum; |
376 | |
377 | if (!ndd->cxl && !efi_namespace_label_has(ndd, checksum)) |
378 | return; |
379 | nsl_set_checksum(ndd, nd_label, checksum: 0); |
380 | sum = nd_fletcher64(addr: nd_label, len: sizeof_namespace_label(ndd), le: 1); |
381 | nsl_set_checksum(ndd, nd_label, checksum: sum); |
382 | } |
383 | |
384 | static bool slot_valid(struct nvdimm_drvdata *ndd, |
385 | struct nd_namespace_label *nd_label, u32 slot) |
386 | { |
387 | bool valid; |
388 | |
389 | /* check that we are written where we expect to be written */ |
390 | if (slot != nsl_get_slot(ndd, nd_label)) |
391 | return false; |
392 | valid = nsl_validate_checksum(ndd, nd_label); |
393 | if (!valid) |
394 | dev_dbg(ndd->dev, "fail checksum. slot: %d\n" , slot); |
395 | return valid; |
396 | } |
397 | |
398 | int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) |
399 | { |
400 | struct nd_namespace_index *nsindex; |
401 | unsigned long *free; |
402 | u32 nslot, slot; |
403 | |
404 | if (!preamble_current(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
405 | return 0; /* no label, nothing to reserve */ |
406 | |
407 | for_each_clear_bit_le(slot, free, nslot) { |
408 | struct nd_namespace_label *nd_label; |
409 | struct nd_region *nd_region = NULL; |
410 | struct nd_label_id label_id; |
411 | struct resource *res; |
412 | uuid_t label_uuid; |
413 | u32 flags; |
414 | |
415 | nd_label = to_label(ndd, slot); |
416 | |
417 | if (!slot_valid(ndd, nd_label, slot)) |
418 | continue; |
419 | |
420 | nsl_get_uuid(ndd, nd_label, uuid: &label_uuid); |
421 | flags = nsl_get_flags(ndd, nd_label); |
422 | nd_label_gen_id(label_id: &label_id, uuid: &label_uuid, flags); |
423 | res = nvdimm_allocate_dpa(ndd, label_id: &label_id, |
424 | start: nsl_get_dpa(ndd, nd_label), |
425 | n: nsl_get_rawsize(ndd, nd_label)); |
426 | nd_dbg_dpa(nd_region, ndd, res, "reserve\n" ); |
427 | if (!res) |
428 | return -EBUSY; |
429 | } |
430 | |
431 | return 0; |
432 | } |
433 | |
434 | int nd_label_data_init(struct nvdimm_drvdata *ndd) |
435 | { |
436 | size_t config_size, read_size, max_xfer, offset; |
437 | struct nd_namespace_index *nsindex; |
438 | unsigned int i; |
439 | int rc = 0; |
440 | u32 nslot; |
441 | |
442 | if (ndd->data) |
443 | return 0; |
444 | |
445 | if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0) { |
446 | dev_dbg(ndd->dev, "failed to init config data area: (%u:%u)\n" , |
447 | ndd->nsarea.max_xfer, ndd->nsarea.config_size); |
448 | return -ENXIO; |
449 | } |
450 | |
451 | /* |
452 | * We need to determine the maximum index area as this is the section |
453 | * we must read and validate before we can start processing labels. |
454 | * |
455 | * If the area is too small to contain the two indexes and 2 labels |
456 | * then we abort. |
457 | * |
458 | * Start at a label size of 128 as this should result in the largest |
459 | * possible namespace index size. |
460 | */ |
461 | ndd->nslabel_size = 128; |
462 | read_size = sizeof_namespace_index(ndd) * 2; |
463 | if (!read_size) |
464 | return -ENXIO; |
465 | |
466 | /* Allocate config data */ |
467 | config_size = ndd->nsarea.config_size; |
468 | ndd->data = kvzalloc(size: config_size, GFP_KERNEL); |
469 | if (!ndd->data) |
470 | return -ENOMEM; |
471 | |
472 | /* |
473 | * We want to guarantee as few reads as possible while conserving |
474 | * memory. To do that we figure out how much unused space will be left |
475 | * in the last read, divide that by the total number of reads it is |
476 | * going to take given our maximum transfer size, and then reduce our |
477 | * maximum transfer size based on that result. |
478 | */ |
479 | max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); |
480 | if (read_size < max_xfer) { |
481 | /* trim waste */ |
482 | max_xfer -= ((max_xfer - 1) - (config_size - 1) % max_xfer) / |
483 | DIV_ROUND_UP(config_size, max_xfer); |
484 | /* make certain we read indexes in exactly 1 read */ |
485 | if (max_xfer < read_size) |
486 | max_xfer = read_size; |
487 | } |
488 | |
489 | /* Make our initial read size a multiple of max_xfer size */ |
490 | read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, |
491 | config_size); |
492 | |
493 | /* Read the index data */ |
494 | rc = nvdimm_get_config_data(ndd, buf: ndd->data, offset: 0, len: read_size); |
495 | if (rc) |
496 | goto out_err; |
497 | |
498 | /* Validate index data, if not valid assume all labels are invalid */ |
499 | ndd->ns_current = nd_label_validate(ndd); |
500 | if (ndd->ns_current < 0) |
501 | return 0; |
502 | |
503 | /* Record our index values */ |
504 | ndd->ns_next = nd_label_next_nsindex(index: ndd->ns_current); |
505 | |
506 | /* Copy "current" index on top of the "next" index */ |
507 | nsindex = to_current_namespace_index(ndd); |
508 | nd_label_copy(ndd, dst: to_next_namespace_index(ndd), src: nsindex); |
509 | |
510 | /* Determine starting offset for label data */ |
511 | offset = __le64_to_cpu(nsindex->labeloff); |
512 | nslot = __le32_to_cpu(nsindex->nslot); |
513 | |
514 | /* Loop through the free list pulling in any active labels */ |
515 | for (i = 0; i < nslot; i++, offset += ndd->nslabel_size) { |
516 | size_t label_read_size; |
517 | |
518 | /* zero out the unused labels */ |
519 | if (test_bit_le(nr: i, addr: nsindex->free)) { |
520 | memset(ndd->data + offset, 0, ndd->nslabel_size); |
521 | continue; |
522 | } |
523 | |
524 | /* if we already read past here then just continue */ |
525 | if (offset + ndd->nslabel_size <= read_size) |
526 | continue; |
527 | |
528 | /* if we haven't read in a while reset our read_size offset */ |
529 | if (read_size < offset) |
530 | read_size = offset; |
531 | |
532 | /* determine how much more will be read after this next call. */ |
533 | label_read_size = offset + ndd->nslabel_size - read_size; |
534 | label_read_size = DIV_ROUND_UP(label_read_size, max_xfer) * |
535 | max_xfer; |
536 | |
537 | /* truncate last read if needed */ |
538 | if (read_size + label_read_size > config_size) |
539 | label_read_size = config_size - read_size; |
540 | |
541 | /* Read the label data */ |
542 | rc = nvdimm_get_config_data(ndd, buf: ndd->data + read_size, |
543 | offset: read_size, len: label_read_size); |
544 | if (rc) |
545 | goto out_err; |
546 | |
547 | /* push read_size to next read offset */ |
548 | read_size += label_read_size; |
549 | } |
550 | |
551 | dev_dbg(ndd->dev, "len: %zu rc: %d\n" , offset, rc); |
552 | out_err: |
553 | return rc; |
554 | } |
555 | |
556 | int nd_label_active_count(struct nvdimm_drvdata *ndd) |
557 | { |
558 | struct nd_namespace_index *nsindex; |
559 | unsigned long *free; |
560 | u32 nslot, slot; |
561 | int count = 0; |
562 | |
563 | if (!preamble_current(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
564 | return 0; |
565 | |
566 | for_each_clear_bit_le(slot, free, nslot) { |
567 | struct nd_namespace_label *nd_label; |
568 | |
569 | nd_label = to_label(ndd, slot); |
570 | |
571 | if (!slot_valid(ndd, nd_label, slot)) { |
572 | u32 label_slot = nsl_get_slot(ndd, nd_label); |
573 | u64 size = nsl_get_rawsize(ndd, nd_label); |
574 | u64 dpa = nsl_get_dpa(ndd, nd_label); |
575 | |
576 | dev_dbg(ndd->dev, |
577 | "slot%d invalid slot: %d dpa: %llx size: %llx\n" , |
578 | slot, label_slot, dpa, size); |
579 | continue; |
580 | } |
581 | count++; |
582 | } |
583 | return count; |
584 | } |
585 | |
586 | struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) |
587 | { |
588 | struct nd_namespace_index *nsindex; |
589 | unsigned long *free; |
590 | u32 nslot, slot; |
591 | |
592 | if (!preamble_current(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
593 | return NULL; |
594 | |
595 | for_each_clear_bit_le(slot, free, nslot) { |
596 | struct nd_namespace_label *nd_label; |
597 | |
598 | nd_label = to_label(ndd, slot); |
599 | if (!slot_valid(ndd, nd_label, slot)) |
600 | continue; |
601 | |
602 | if (n-- == 0) |
603 | return to_label(ndd, slot); |
604 | } |
605 | |
606 | return NULL; |
607 | } |
608 | |
609 | u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) |
610 | { |
611 | struct nd_namespace_index *nsindex; |
612 | unsigned long *free; |
613 | u32 nslot, slot; |
614 | |
615 | if (!preamble_next(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
616 | return UINT_MAX; |
617 | |
618 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); |
619 | |
620 | slot = find_next_bit_le(addr: free, size: nslot, offset: 0); |
621 | if (slot == nslot) |
622 | return UINT_MAX; |
623 | |
624 | clear_bit_le(nr: slot, addr: free); |
625 | |
626 | return slot; |
627 | } |
628 | |
629 | bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) |
630 | { |
631 | struct nd_namespace_index *nsindex; |
632 | unsigned long *free; |
633 | u32 nslot; |
634 | |
635 | if (!preamble_next(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
636 | return false; |
637 | |
638 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); |
639 | |
640 | if (slot < nslot) |
641 | return !test_and_set_bit_le(nr: slot, addr: free); |
642 | return false; |
643 | } |
644 | |
645 | u32 nd_label_nfree(struct nvdimm_drvdata *ndd) |
646 | { |
647 | struct nd_namespace_index *nsindex; |
648 | unsigned long *free; |
649 | u32 nslot; |
650 | |
651 | WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); |
652 | |
653 | if (!preamble_next(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
654 | return nvdimm_num_label_slots(ndd); |
655 | |
656 | return bitmap_weight(src: free, nbits: nslot); |
657 | } |
658 | |
659 | static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, |
660 | unsigned long flags) |
661 | { |
662 | struct nd_namespace_index *nsindex; |
663 | unsigned long offset; |
664 | u64 checksum; |
665 | u32 nslot; |
666 | int rc; |
667 | |
668 | nsindex = to_namespace_index(ndd, i: index); |
669 | if (flags & ND_NSINDEX_INIT) |
670 | nslot = nvdimm_num_label_slots(ndd); |
671 | else |
672 | nslot = __le32_to_cpu(nsindex->nslot); |
673 | |
674 | memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); |
675 | memset(&nsindex->flags, 0, 3); |
676 | nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; |
677 | nsindex->seq = __cpu_to_le32(seq); |
678 | offset = (unsigned long) nsindex |
679 | - (unsigned long) to_namespace_index(ndd, i: 0); |
680 | nsindex->myoff = __cpu_to_le64(offset); |
681 | nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); |
682 | offset = (unsigned long) to_namespace_index(ndd, |
683 | i: nd_label_next_nsindex(index)) |
684 | - (unsigned long) to_namespace_index(ndd, i: 0); |
685 | nsindex->otheroff = __cpu_to_le64(offset); |
686 | offset = (unsigned long) nd_label_base(ndd) |
687 | - (unsigned long) to_namespace_index(ndd, i: 0); |
688 | nsindex->labeloff = __cpu_to_le64(offset); |
689 | nsindex->nslot = __cpu_to_le32(nslot); |
690 | nsindex->major = __cpu_to_le16(1); |
691 | if (sizeof_namespace_label(ndd) < 256) |
692 | nsindex->minor = __cpu_to_le16(1); |
693 | else |
694 | nsindex->minor = __cpu_to_le16(2); |
695 | nsindex->checksum = __cpu_to_le64(0); |
696 | if (flags & ND_NSINDEX_INIT) { |
697 | unsigned long *free = (unsigned long *) nsindex->free; |
698 | u32 nfree = ALIGN(nslot, BITS_PER_LONG); |
699 | int last_bits, i; |
700 | |
701 | memset(nsindex->free, 0xff, nfree / 8); |
702 | for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) |
703 | clear_bit_le(nr: nslot + i, addr: free); |
704 | } |
705 | checksum = nd_fletcher64(addr: nsindex, len: sizeof_namespace_index(ndd), le: 1); |
706 | nsindex->checksum = __cpu_to_le64(checksum); |
707 | rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), |
708 | buf: nsindex, len: sizeof_namespace_index(ndd)); |
709 | if (rc < 0) |
710 | return rc; |
711 | |
712 | if (flags & ND_NSINDEX_INIT) |
713 | return 0; |
714 | |
715 | /* copy the index we just wrote to the new 'next' */ |
716 | WARN_ON(index != ndd->ns_next); |
717 | nd_label_copy(ndd, dst: to_current_namespace_index(ndd), src: nsindex); |
718 | ndd->ns_current = nd_label_next_nsindex(index: ndd->ns_current); |
719 | ndd->ns_next = nd_label_next_nsindex(index: ndd->ns_next); |
720 | WARN_ON(ndd->ns_current == ndd->ns_next); |
721 | |
722 | return 0; |
723 | } |
724 | |
725 | static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, |
726 | struct nd_namespace_label *nd_label) |
727 | { |
728 | return (unsigned long) nd_label |
729 | - (unsigned long) to_namespace_index(ndd, i: 0); |
730 | } |
731 | |
732 | static enum nvdimm_claim_class guid_to_nvdimm_cclass(guid_t *guid) |
733 | { |
734 | if (guid_equal(u1: guid, u2: &nvdimm_btt_guid)) |
735 | return NVDIMM_CCLASS_BTT; |
736 | else if (guid_equal(u1: guid, u2: &nvdimm_btt2_guid)) |
737 | return NVDIMM_CCLASS_BTT2; |
738 | else if (guid_equal(u1: guid, u2: &nvdimm_pfn_guid)) |
739 | return NVDIMM_CCLASS_PFN; |
740 | else if (guid_equal(u1: guid, u2: &nvdimm_dax_guid)) |
741 | return NVDIMM_CCLASS_DAX; |
742 | else if (guid_equal(u1: guid, u2: &guid_null)) |
743 | return NVDIMM_CCLASS_NONE; |
744 | |
745 | return NVDIMM_CCLASS_UNKNOWN; |
746 | } |
747 | |
748 | /* CXL labels store UUIDs instead of GUIDs for the same data */ |
749 | static enum nvdimm_claim_class uuid_to_nvdimm_cclass(uuid_t *uuid) |
750 | { |
751 | if (uuid_equal(u1: uuid, u2: &nvdimm_btt_uuid)) |
752 | return NVDIMM_CCLASS_BTT; |
753 | else if (uuid_equal(u1: uuid, u2: &nvdimm_btt2_uuid)) |
754 | return NVDIMM_CCLASS_BTT2; |
755 | else if (uuid_equal(u1: uuid, u2: &nvdimm_pfn_uuid)) |
756 | return NVDIMM_CCLASS_PFN; |
757 | else if (uuid_equal(u1: uuid, u2: &nvdimm_dax_uuid)) |
758 | return NVDIMM_CCLASS_DAX; |
759 | else if (uuid_equal(u1: uuid, u2: &uuid_null)) |
760 | return NVDIMM_CCLASS_NONE; |
761 | |
762 | return NVDIMM_CCLASS_UNKNOWN; |
763 | } |
764 | |
765 | static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, |
766 | guid_t *target) |
767 | { |
768 | if (claim_class == NVDIMM_CCLASS_BTT) |
769 | return &nvdimm_btt_guid; |
770 | else if (claim_class == NVDIMM_CCLASS_BTT2) |
771 | return &nvdimm_btt2_guid; |
772 | else if (claim_class == NVDIMM_CCLASS_PFN) |
773 | return &nvdimm_pfn_guid; |
774 | else if (claim_class == NVDIMM_CCLASS_DAX) |
775 | return &nvdimm_dax_guid; |
776 | else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { |
777 | /* |
778 | * If we're modifying a namespace for which we don't |
779 | * know the claim_class, don't touch the existing guid. |
780 | */ |
781 | return target; |
782 | } else |
783 | return &guid_null; |
784 | } |
785 | |
786 | /* CXL labels store UUIDs instead of GUIDs for the same data */ |
787 | static const uuid_t *to_abstraction_uuid(enum nvdimm_claim_class claim_class, |
788 | uuid_t *target) |
789 | { |
790 | if (claim_class == NVDIMM_CCLASS_BTT) |
791 | return &nvdimm_btt_uuid; |
792 | else if (claim_class == NVDIMM_CCLASS_BTT2) |
793 | return &nvdimm_btt2_uuid; |
794 | else if (claim_class == NVDIMM_CCLASS_PFN) |
795 | return &nvdimm_pfn_uuid; |
796 | else if (claim_class == NVDIMM_CCLASS_DAX) |
797 | return &nvdimm_dax_uuid; |
798 | else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { |
799 | /* |
800 | * If we're modifying a namespace for which we don't |
801 | * know the claim_class, don't touch the existing uuid. |
802 | */ |
803 | return target; |
804 | } else |
805 | return &uuid_null; |
806 | } |
807 | |
808 | static void reap_victim(struct nd_mapping *nd_mapping, |
809 | struct nd_label_ent *victim) |
810 | { |
811 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
812 | u32 slot = to_slot(ndd, nd_label: victim->label); |
813 | |
814 | dev_dbg(ndd->dev, "free: %d\n" , slot); |
815 | nd_label_free_slot(ndd, slot); |
816 | victim->label = NULL; |
817 | } |
818 | |
819 | static void nsl_set_type_guid(struct nvdimm_drvdata *ndd, |
820 | struct nd_namespace_label *nd_label, guid_t *guid) |
821 | { |
822 | if (efi_namespace_label_has(ndd, type_guid)) |
823 | guid_copy(dst: &nd_label->efi.type_guid, src: guid); |
824 | } |
825 | |
826 | bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd, |
827 | struct nd_namespace_label *nd_label, guid_t *guid) |
828 | { |
829 | if (ndd->cxl || !efi_namespace_label_has(ndd, type_guid)) |
830 | return true; |
831 | if (!guid_equal(u1: &nd_label->efi.type_guid, u2: guid)) { |
832 | dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n" , guid, |
833 | &nd_label->efi.type_guid); |
834 | return false; |
835 | } |
836 | return true; |
837 | } |
838 | |
839 | static void nsl_set_claim_class(struct nvdimm_drvdata *ndd, |
840 | struct nd_namespace_label *nd_label, |
841 | enum nvdimm_claim_class claim_class) |
842 | { |
843 | if (ndd->cxl) { |
844 | uuid_t uuid; |
845 | |
846 | import_uuid(dst: &uuid, src: nd_label->cxl.abstraction_uuid); |
847 | export_uuid(dst: nd_label->cxl.abstraction_uuid, |
848 | src: to_abstraction_uuid(claim_class, target: &uuid)); |
849 | return; |
850 | } |
851 | |
852 | if (!efi_namespace_label_has(ndd, abstraction_guid)) |
853 | return; |
854 | guid_copy(dst: &nd_label->efi.abstraction_guid, |
855 | src: to_abstraction_guid(claim_class, |
856 | target: &nd_label->efi.abstraction_guid)); |
857 | } |
858 | |
859 | enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd, |
860 | struct nd_namespace_label *nd_label) |
861 | { |
862 | if (ndd->cxl) { |
863 | uuid_t uuid; |
864 | |
865 | import_uuid(dst: &uuid, src: nd_label->cxl.abstraction_uuid); |
866 | return uuid_to_nvdimm_cclass(uuid: &uuid); |
867 | } |
868 | if (!efi_namespace_label_has(ndd, abstraction_guid)) |
869 | return NVDIMM_CCLASS_NONE; |
870 | return guid_to_nvdimm_cclass(guid: &nd_label->efi.abstraction_guid); |
871 | } |
872 | |
873 | static int __pmem_label_update(struct nd_region *nd_region, |
874 | struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, |
875 | int pos, unsigned long flags) |
876 | { |
877 | struct nd_namespace_common *ndns = &nspm->nsio.common; |
878 | struct nd_interleave_set *nd_set = nd_region->nd_set; |
879 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
880 | struct nd_namespace_label *nd_label; |
881 | struct nd_namespace_index *nsindex; |
882 | struct nd_label_ent *label_ent; |
883 | struct nd_label_id label_id; |
884 | struct resource *res; |
885 | unsigned long *free; |
886 | u32 nslot, slot; |
887 | size_t offset; |
888 | u64 cookie; |
889 | int rc; |
890 | |
891 | if (!preamble_next(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
892 | return -ENXIO; |
893 | |
894 | cookie = nd_region_interleave_set_cookie(nd_region, nsindex); |
895 | nd_label_gen_id(label_id: &label_id, uuid: nspm->uuid, flags: 0); |
896 | for_each_dpa_resource(ndd, res) |
897 | if (strcmp(res->name, label_id.id) == 0) |
898 | break; |
899 | |
900 | if (!res) { |
901 | WARN_ON_ONCE(1); |
902 | return -ENXIO; |
903 | } |
904 | |
905 | /* allocate and write the label to the staging (next) index */ |
906 | slot = nd_label_alloc_slot(ndd); |
907 | if (slot == UINT_MAX) |
908 | return -ENXIO; |
909 | dev_dbg(ndd->dev, "allocated: %d\n" , slot); |
910 | |
911 | nd_label = to_label(ndd, slot); |
912 | memset(nd_label, 0, sizeof_namespace_label(ndd)); |
913 | nsl_set_uuid(ndd, nd_label, uuid: nspm->uuid); |
914 | nsl_set_name(ndd, nd_label, name: nspm->alt_name); |
915 | nsl_set_flags(ndd, nd_label, flags); |
916 | nsl_set_nlabel(ndd, nd_label, nlabel: nd_region->ndr_mappings); |
917 | nsl_set_nrange(ndd, nd_label, nrange: 1); |
918 | nsl_set_position(ndd, nd_label, position: pos); |
919 | nsl_set_isetcookie(ndd, nd_label, isetcookie: cookie); |
920 | nsl_set_rawsize(ndd, nd_label, rawsize: resource_size(res)); |
921 | nsl_set_lbasize(ndd, nd_label, lbasize: nspm->lbasize); |
922 | nsl_set_dpa(ndd, nd_label, dpa: res->start); |
923 | nsl_set_slot(ndd, nd_label, slot); |
924 | nsl_set_type_guid(ndd, nd_label, guid: &nd_set->type_guid); |
925 | nsl_set_claim_class(ndd, nd_label, claim_class: ndns->claim_class); |
926 | nsl_calculate_checksum(ndd, nd_label); |
927 | nd_dbg_dpa(nd_region, ndd, res, "\n" ); |
928 | |
929 | /* update label */ |
930 | offset = nd_label_offset(ndd, nd_label); |
931 | rc = nvdimm_set_config_data(ndd, offset, buf: nd_label, |
932 | len: sizeof_namespace_label(ndd)); |
933 | if (rc < 0) |
934 | return rc; |
935 | |
936 | /* Garbage collect the previous label */ |
937 | mutex_lock(&nd_mapping->lock); |
938 | list_for_each_entry(label_ent, &nd_mapping->labels, list) { |
939 | if (!label_ent->label) |
940 | continue; |
941 | if (test_and_clear_bit(nr: ND_LABEL_REAP, addr: &label_ent->flags) || |
942 | nsl_uuid_equal(ndd, nd_label: label_ent->label, uuid: nspm->uuid)) |
943 | reap_victim(nd_mapping, victim: label_ent); |
944 | } |
945 | |
946 | /* update index */ |
947 | rc = nd_label_write_index(ndd, index: ndd->ns_next, |
948 | seq: nd_inc_seq(__le32_to_cpu(nsindex->seq)), flags: 0); |
949 | if (rc == 0) { |
950 | list_for_each_entry(label_ent, &nd_mapping->labels, list) |
951 | if (!label_ent->label) { |
952 | label_ent->label = nd_label; |
953 | nd_label = NULL; |
954 | break; |
955 | } |
956 | dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, |
957 | "failed to track label: %d\n" , |
958 | to_slot(ndd, nd_label)); |
959 | if (nd_label) |
960 | rc = -ENXIO; |
961 | } |
962 | mutex_unlock(lock: &nd_mapping->lock); |
963 | |
964 | return rc; |
965 | } |
966 | |
967 | static int init_labels(struct nd_mapping *nd_mapping, int num_labels) |
968 | { |
969 | int i, old_num_labels = 0; |
970 | struct nd_label_ent *label_ent; |
971 | struct nd_namespace_index *nsindex; |
972 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
973 | |
974 | mutex_lock(&nd_mapping->lock); |
975 | list_for_each_entry(label_ent, &nd_mapping->labels, list) |
976 | old_num_labels++; |
977 | mutex_unlock(lock: &nd_mapping->lock); |
978 | |
979 | /* |
980 | * We need to preserve all the old labels for the mapping so |
981 | * they can be garbage collected after writing the new labels. |
982 | */ |
983 | for (i = old_num_labels; i < num_labels; i++) { |
984 | label_ent = kzalloc(size: sizeof(*label_ent), GFP_KERNEL); |
985 | if (!label_ent) |
986 | return -ENOMEM; |
987 | mutex_lock(&nd_mapping->lock); |
988 | list_add_tail(new: &label_ent->list, head: &nd_mapping->labels); |
989 | mutex_unlock(lock: &nd_mapping->lock); |
990 | } |
991 | |
992 | if (ndd->ns_current == -1 || ndd->ns_next == -1) |
993 | /* pass */; |
994 | else |
995 | return max(num_labels, old_num_labels); |
996 | |
997 | nsindex = to_namespace_index(ndd, i: 0); |
998 | memset(nsindex, 0, ndd->nsarea.config_size); |
999 | for (i = 0; i < 2; i++) { |
1000 | int rc = nd_label_write_index(ndd, index: i, seq: 3 - i, flags: ND_NSINDEX_INIT); |
1001 | |
1002 | if (rc) |
1003 | return rc; |
1004 | } |
1005 | ndd->ns_next = 1; |
1006 | ndd->ns_current = 0; |
1007 | |
1008 | return max(num_labels, old_num_labels); |
1009 | } |
1010 | |
1011 | static int del_labels(struct nd_mapping *nd_mapping, uuid_t *uuid) |
1012 | { |
1013 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1014 | struct nd_label_ent *label_ent, *e; |
1015 | struct nd_namespace_index *nsindex; |
1016 | unsigned long *free; |
1017 | LIST_HEAD(list); |
1018 | u32 nslot, slot; |
1019 | int active = 0; |
1020 | |
1021 | if (!uuid) |
1022 | return 0; |
1023 | |
1024 | /* no index || no labels == nothing to delete */ |
1025 | if (!preamble_next(ndd, nsindex: &nsindex, free: &free, nslot: &nslot)) |
1026 | return 0; |
1027 | |
1028 | mutex_lock(&nd_mapping->lock); |
1029 | list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { |
1030 | struct nd_namespace_label *nd_label = label_ent->label; |
1031 | |
1032 | if (!nd_label) |
1033 | continue; |
1034 | active++; |
1035 | if (!nsl_uuid_equal(ndd, nd_label, uuid)) |
1036 | continue; |
1037 | active--; |
1038 | slot = to_slot(ndd, nd_label); |
1039 | nd_label_free_slot(ndd, slot); |
1040 | dev_dbg(ndd->dev, "free: %d\n" , slot); |
1041 | list_move_tail(list: &label_ent->list, head: &list); |
1042 | label_ent->label = NULL; |
1043 | } |
1044 | list_splice_tail_init(list: &list, head: &nd_mapping->labels); |
1045 | |
1046 | if (active == 0) { |
1047 | nd_mapping_free_labels(nd_mapping); |
1048 | dev_dbg(ndd->dev, "no more active labels\n" ); |
1049 | } |
1050 | mutex_unlock(lock: &nd_mapping->lock); |
1051 | |
1052 | return nd_label_write_index(ndd, index: ndd->ns_next, |
1053 | seq: nd_inc_seq(__le32_to_cpu(nsindex->seq)), flags: 0); |
1054 | } |
1055 | |
1056 | int nd_pmem_namespace_label_update(struct nd_region *nd_region, |
1057 | struct nd_namespace_pmem *nspm, resource_size_t size) |
1058 | { |
1059 | int i, rc; |
1060 | |
1061 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
1062 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
1063 | struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); |
1064 | struct resource *res; |
1065 | int count = 0; |
1066 | |
1067 | if (size == 0) { |
1068 | rc = del_labels(nd_mapping, uuid: nspm->uuid); |
1069 | if (rc) |
1070 | return rc; |
1071 | continue; |
1072 | } |
1073 | |
1074 | for_each_dpa_resource(ndd, res) |
1075 | if (strncmp(res->name, "pmem" , 4) == 0) |
1076 | count++; |
1077 | WARN_ON_ONCE(!count); |
1078 | |
1079 | rc = init_labels(nd_mapping, num_labels: count); |
1080 | if (rc < 0) |
1081 | return rc; |
1082 | |
1083 | rc = __pmem_label_update(nd_region, nd_mapping, nspm, pos: i, |
1084 | flags: NSLABEL_FLAG_UPDATING); |
1085 | if (rc) |
1086 | return rc; |
1087 | } |
1088 | |
1089 | if (size == 0) |
1090 | return 0; |
1091 | |
1092 | /* Clear the UPDATING flag per UEFI 2.7 expectations */ |
1093 | for (i = 0; i < nd_region->ndr_mappings; i++) { |
1094 | struct nd_mapping *nd_mapping = &nd_region->mapping[i]; |
1095 | |
1096 | rc = __pmem_label_update(nd_region, nd_mapping, nspm, pos: i, flags: 0); |
1097 | if (rc) |
1098 | return rc; |
1099 | } |
1100 | |
1101 | return 0; |
1102 | } |
1103 | |
1104 | int __init nd_label_init(void) |
1105 | { |
1106 | WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); |
1107 | WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); |
1108 | WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); |
1109 | WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); |
1110 | |
1111 | WARN_ON(uuid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_uuid)); |
1112 | WARN_ON(uuid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_uuid)); |
1113 | WARN_ON(uuid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_uuid)); |
1114 | WARN_ON(uuid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_uuid)); |
1115 | |
1116 | WARN_ON(uuid_parse(CXL_REGION_UUID, &cxl_region_uuid)); |
1117 | WARN_ON(uuid_parse(CXL_NAMESPACE_UUID, &cxl_namespace_uuid)); |
1118 | |
1119 | return 0; |
1120 | } |
1121 | |