14a826c83SDan Williams /* 24a826c83SDan Williams * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. 34a826c83SDan Williams * 44a826c83SDan Williams * This program is free software; you can redistribute it and/or modify 54a826c83SDan Williams * it under the terms of version 2 of the GNU General Public License as 64a826c83SDan Williams * published by the Free Software Foundation. 74a826c83SDan Williams * 84a826c83SDan Williams * This program is distributed in the hope that it will be useful, but 94a826c83SDan Williams * WITHOUT ANY WARRANTY; without even the implied warranty of 104a826c83SDan Williams * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 114a826c83SDan Williams * General Public License for more details. 124a826c83SDan Williams */ 134a826c83SDan Williams #include <linux/device.h> 144a826c83SDan Williams #include <linux/ndctl.h> 15b3fde74eSDan Williams #include <linux/uuid.h> 16f524bf27SDan Williams #include <linux/slab.h> 174a826c83SDan Williams #include <linux/io.h> 184a826c83SDan Williams #include <linux/nd.h> 194a826c83SDan Williams #include "nd-core.h" 204a826c83SDan Williams #include "label.h" 214a826c83SDan Williams #include "nd.h" 224a826c83SDan Williams 23b3fde74eSDan Williams static guid_t nvdimm_btt_guid; 2414e49454SVishal Verma static guid_t nvdimm_btt2_guid; 25b3fde74eSDan Williams static guid_t nvdimm_pfn_guid; 26b3fde74eSDan Williams static guid_t nvdimm_dax_guid; 27b3fde74eSDan Williams 284a826c83SDan Williams static u32 best_seq(u32 a, u32 b) 294a826c83SDan Williams { 304a826c83SDan Williams a &= NSINDEX_SEQ_MASK; 314a826c83SDan Williams b &= NSINDEX_SEQ_MASK; 324a826c83SDan Williams 334a826c83SDan Williams if (a == 0 || a == b) 344a826c83SDan Williams return b; 354a826c83SDan Williams else if (b == 0) 364a826c83SDan Williams return a; 374a826c83SDan Williams else if (nd_inc_seq(a) == b) 384a826c83SDan Williams return b; 394a826c83SDan Williams else 404a826c83SDan Williams return a; 414a826c83SDan Williams } 424a826c83SDan Williams 43564e871aSDan Williams unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) 44564e871aSDan Williams { 45564e871aSDan Williams return ndd->nslabel_size; 46564e871aSDan Williams } 47564e871aSDan Williams 489e694d9cSToshi Kani static size_t __sizeof_namespace_index(u32 nslot) 499e694d9cSToshi Kani { 509e694d9cSToshi Kani return ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), 519e694d9cSToshi Kani NSINDEX_ALIGN); 529e694d9cSToshi Kani } 539e694d9cSToshi Kani 549e694d9cSToshi Kani static int __nvdimm_num_label_slots(struct nvdimm_drvdata *ndd, 559e694d9cSToshi Kani size_t index_size) 569e694d9cSToshi Kani { 579e694d9cSToshi Kani return (ndd->nsarea.config_size - index_size * 2) / 589e694d9cSToshi Kani sizeof_namespace_label(ndd); 599e694d9cSToshi Kani } 609e694d9cSToshi Kani 6102881768SDan Williams int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) 6202881768SDan Williams { 639e694d9cSToshi Kani u32 tmp_nslot, n; 649e694d9cSToshi Kani 659e694d9cSToshi Kani tmp_nslot = ndd->nsarea.config_size / sizeof_namespace_label(ndd); 669e694d9cSToshi Kani n = __sizeof_namespace_index(tmp_nslot) / NSINDEX_ALIGN; 679e694d9cSToshi Kani 689e694d9cSToshi Kani return __nvdimm_num_label_slots(ndd, NSINDEX_ALIGN * n); 6902881768SDan Williams } 7002881768SDan Williams 714a826c83SDan Williams size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) 724a826c83SDan Williams { 7302881768SDan Williams u32 nslot, space, size; 744a826c83SDan Williams 754a826c83SDan Williams /* 769e694d9cSToshi Kani * Per UEFI 2.7, the minimum size of the Label Storage Area is large 779e694d9cSToshi Kani * enough to hold 2 index blocks and 2 labels. The minimum index 781cfeb66eSAlexander Duyck * block size is 256 bytes. The label size is 128 for namespaces 791cfeb66eSAlexander Duyck * prior to version 1.2 and at minimum 256 for version 1.2 and later. 804a826c83SDan Williams */ 8102881768SDan Williams nslot = nvdimm_num_label_slots(ndd); 8202881768SDan Williams space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); 839e694d9cSToshi Kani size = __sizeof_namespace_index(nslot) * 2; 849e694d9cSToshi Kani if (size <= space && nslot >= 2) 8502881768SDan Williams return size / 2; 864a826c83SDan Williams 8702881768SDan Williams dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n", 8802881768SDan Williams ndd->nsarea.config_size, sizeof_namespace_label(ndd)); 8902881768SDan Williams return 0; 90f524bf27SDan Williams } 91f524bf27SDan Williams 92564e871aSDan Williams static int __nd_label_validate(struct nvdimm_drvdata *ndd) 934a826c83SDan Williams { 944a826c83SDan Williams /* 954a826c83SDan Williams * On media label format consists of two index blocks followed 964a826c83SDan Williams * by an array of labels. None of these structures are ever 974a826c83SDan Williams * updated in place. A sequence number tracks the current 984a826c83SDan Williams * active index and the next one to write, while labels are 994a826c83SDan Williams * written to free slots. 1004a826c83SDan Williams * 1014a826c83SDan Williams * +------------+ 1024a826c83SDan Williams * | | 1034a826c83SDan Williams * | nsindex0 | 1044a826c83SDan Williams * | | 1054a826c83SDan Williams * +------------+ 1064a826c83SDan Williams * | | 1074a826c83SDan Williams * | nsindex1 | 1084a826c83SDan Williams * | | 1094a826c83SDan Williams * +------------+ 1104a826c83SDan Williams * | label0 | 1114a826c83SDan Williams * +------------+ 1124a826c83SDan Williams * | label1 | 1134a826c83SDan Williams * +------------+ 1144a826c83SDan Williams * | | 1154a826c83SDan Williams * ....nslot... 1164a826c83SDan Williams * | | 1174a826c83SDan Williams * +------------+ 1184a826c83SDan Williams * | labelN | 1194a826c83SDan Williams * +------------+ 1204a826c83SDan Williams */ 1214a826c83SDan Williams struct nd_namespace_index *nsindex[] = { 1224a826c83SDan Williams to_namespace_index(ndd, 0), 1234a826c83SDan Williams to_namespace_index(ndd, 1), 1244a826c83SDan Williams }; 1254a826c83SDan Williams const int num_index = ARRAY_SIZE(nsindex); 1264a826c83SDan Williams struct device *dev = ndd->dev; 1274a826c83SDan Williams bool valid[2] = { 0 }; 1284a826c83SDan Williams int i, num_valid = 0; 1294a826c83SDan Williams u32 seq; 1304a826c83SDan Williams 1314a826c83SDan Williams for (i = 0; i < num_index; i++) { 1324a826c83SDan Williams u32 nslot; 1334a826c83SDan Williams u8 sig[NSINDEX_SIG_LEN]; 1344a826c83SDan Williams u64 sum_save, sum, size; 135564e871aSDan Williams unsigned int version, labelsize; 1364a826c83SDan Williams 1374a826c83SDan Williams memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); 1384a826c83SDan Williams if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) { 139426824d6SDan Williams dev_dbg(dev, "nsindex%d signature invalid\n", i); 1404a826c83SDan Williams continue; 1414a826c83SDan Williams } 142564e871aSDan Williams 143564e871aSDan Williams /* label sizes larger than 128 arrived with v1.2 */ 144564e871aSDan Williams version = __le16_to_cpu(nsindex[i]->major) * 100 145564e871aSDan Williams + __le16_to_cpu(nsindex[i]->minor); 146564e871aSDan Williams if (version >= 102) 147564e871aSDan Williams labelsize = 1 << (7 + nsindex[i]->labelsize); 148564e871aSDan Williams else 149564e871aSDan Williams labelsize = 128; 150564e871aSDan Williams 151564e871aSDan Williams if (labelsize != sizeof_namespace_label(ndd)) { 152426824d6SDan Williams dev_dbg(dev, "nsindex%d labelsize %d invalid\n", 153426824d6SDan Williams i, nsindex[i]->labelsize); 154564e871aSDan Williams continue; 155564e871aSDan Williams } 156564e871aSDan Williams 1574a826c83SDan Williams sum_save = __le64_to_cpu(nsindex[i]->checksum); 1584a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(0); 1594a826c83SDan Williams sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1); 1604a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(sum_save); 1614a826c83SDan Williams if (sum != sum_save) { 162426824d6SDan Williams dev_dbg(dev, "nsindex%d checksum invalid\n", i); 1634a826c83SDan Williams continue; 1644a826c83SDan Williams } 1654a826c83SDan Williams 1664a826c83SDan Williams seq = __le32_to_cpu(nsindex[i]->seq); 1674a826c83SDan Williams if ((seq & NSINDEX_SEQ_MASK) == 0) { 168426824d6SDan Williams dev_dbg(dev, "nsindex%d sequence: %#x invalid\n", i, seq); 1694a826c83SDan Williams continue; 1704a826c83SDan Williams } 1714a826c83SDan Williams 1724a826c83SDan Williams /* sanity check the index against expected values */ 1734a826c83SDan Williams if (__le64_to_cpu(nsindex[i]->myoff) 1744a826c83SDan Williams != i * sizeof_namespace_index(ndd)) { 175426824d6SDan Williams dev_dbg(dev, "nsindex%d myoff: %#llx invalid\n", 176426824d6SDan Williams i, (unsigned long long) 1774a826c83SDan Williams __le64_to_cpu(nsindex[i]->myoff)); 1784a826c83SDan Williams continue; 1794a826c83SDan Williams } 1804a826c83SDan Williams if (__le64_to_cpu(nsindex[i]->otheroff) 1814a826c83SDan Williams != (!i) * sizeof_namespace_index(ndd)) { 182426824d6SDan Williams dev_dbg(dev, "nsindex%d otheroff: %#llx invalid\n", 183426824d6SDan Williams i, (unsigned long long) 1844a826c83SDan Williams __le64_to_cpu(nsindex[i]->otheroff)); 1854a826c83SDan Williams continue; 1864a826c83SDan Williams } 187d86d4d63SAlexander Duyck if (__le64_to_cpu(nsindex[i]->labeloff) 188d86d4d63SAlexander Duyck != 2 * sizeof_namespace_index(ndd)) { 189d86d4d63SAlexander Duyck dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n", 190d86d4d63SAlexander Duyck i, (unsigned long long) 191d86d4d63SAlexander Duyck __le64_to_cpu(nsindex[i]->labeloff)); 192d86d4d63SAlexander Duyck continue; 193d86d4d63SAlexander Duyck } 1944a826c83SDan Williams 1954a826c83SDan Williams size = __le64_to_cpu(nsindex[i]->mysize); 1964a826c83SDan Williams if (size > sizeof_namespace_index(ndd) 1974a826c83SDan Williams || size < sizeof(struct nd_namespace_index)) { 198426824d6SDan Williams dev_dbg(dev, "nsindex%d mysize: %#llx invalid\n", i, size); 1994a826c83SDan Williams continue; 2004a826c83SDan Williams } 2014a826c83SDan Williams 2024a826c83SDan Williams nslot = __le32_to_cpu(nsindex[i]->nslot); 203564e871aSDan Williams if (nslot * sizeof_namespace_label(ndd) 2044a826c83SDan Williams + 2 * sizeof_namespace_index(ndd) 2054a826c83SDan Williams > ndd->nsarea.config_size) { 206426824d6SDan Williams dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n", 207426824d6SDan Williams i, nslot, ndd->nsarea.config_size); 2084a826c83SDan Williams continue; 2094a826c83SDan Williams } 2104a826c83SDan Williams valid[i] = true; 2114a826c83SDan Williams num_valid++; 2124a826c83SDan Williams } 2134a826c83SDan Williams 2144a826c83SDan Williams switch (num_valid) { 2154a826c83SDan Williams case 0: 2164a826c83SDan Williams break; 2174a826c83SDan Williams case 1: 2184a826c83SDan Williams for (i = 0; i < num_index; i++) 2194a826c83SDan Williams if (valid[i]) 2204a826c83SDan Williams return i; 2214a826c83SDan Williams /* can't have num_valid > 0 but valid[] = { false, false } */ 2224a826c83SDan Williams WARN_ON(1); 2234a826c83SDan Williams break; 2244a826c83SDan Williams default: 2254a826c83SDan Williams /* pick the best index... */ 2264a826c83SDan Williams seq = best_seq(__le32_to_cpu(nsindex[0]->seq), 2274a826c83SDan Williams __le32_to_cpu(nsindex[1]->seq)); 2284a826c83SDan Williams if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) 2294a826c83SDan Williams return 1; 2304a826c83SDan Williams else 2314a826c83SDan Williams return 0; 2324a826c83SDan Williams break; 2334a826c83SDan Williams } 2344a826c83SDan Williams 2354a826c83SDan Williams return -1; 2364a826c83SDan Williams } 2374a826c83SDan Williams 238564e871aSDan Williams int nd_label_validate(struct nvdimm_drvdata *ndd) 239564e871aSDan Williams { 240564e871aSDan Williams /* 241564e871aSDan Williams * In order to probe for and validate namespace index blocks we 242564e871aSDan Williams * need to know the size of the labels, and we can't trust the 243564e871aSDan Williams * size of the labels until we validate the index blocks. 244564e871aSDan Williams * Resolve this dependency loop by probing for known label 2458990cdf1SDan Williams * sizes, but default to v1.2 256-byte namespace labels if 2468990cdf1SDan Williams * discovery fails. 247564e871aSDan Williams */ 2488990cdf1SDan Williams int label_size[] = { 128, 256 }; 249564e871aSDan Williams int i, rc; 250564e871aSDan Williams 251564e871aSDan Williams for (i = 0; i < ARRAY_SIZE(label_size); i++) { 252564e871aSDan Williams ndd->nslabel_size = label_size[i]; 253564e871aSDan Williams rc = __nd_label_validate(ndd); 254564e871aSDan Williams if (rc >= 0) 255564e871aSDan Williams return rc; 256564e871aSDan Williams } 257564e871aSDan Williams 258564e871aSDan Williams return -1; 259564e871aSDan Williams } 260564e871aSDan Williams 2614a826c83SDan Williams void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst, 2624a826c83SDan Williams struct nd_namespace_index *src) 2634a826c83SDan Williams { 264*19418b02SAlexander Duyck /* just exit if either destination or source is NULL */ 265*19418b02SAlexander Duyck if (!dst || !src) 2664a826c83SDan Williams return; 2674a826c83SDan Williams 2684a826c83SDan Williams memcpy(dst, src, sizeof_namespace_index(ndd)); 2694a826c83SDan Williams } 2704a826c83SDan Williams 2714a826c83SDan Williams static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) 2724a826c83SDan Williams { 2734a826c83SDan Williams void *base = to_namespace_index(ndd, 0); 2744a826c83SDan Williams 2754a826c83SDan Williams return base + 2 * sizeof_namespace_index(ndd); 2764a826c83SDan Williams } 2774a826c83SDan Williams 278f524bf27SDan Williams static int to_slot(struct nvdimm_drvdata *ndd, 279f524bf27SDan Williams struct nd_namespace_label *nd_label) 280f524bf27SDan Williams { 281564e871aSDan Williams unsigned long label, base; 282564e871aSDan Williams 283564e871aSDan Williams label = (unsigned long) nd_label; 284564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 285564e871aSDan Williams 286564e871aSDan Williams return (label - base) / sizeof_namespace_label(ndd); 287564e871aSDan Williams } 288564e871aSDan Williams 289564e871aSDan Williams static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) 290564e871aSDan Williams { 291564e871aSDan Williams unsigned long label, base; 292564e871aSDan Williams 293564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 294564e871aSDan Williams label = base + sizeof_namespace_label(ndd) * slot; 295564e871aSDan Williams 296564e871aSDan Williams return (struct nd_namespace_label *) label; 297f524bf27SDan Williams } 298f524bf27SDan Williams 2994a826c83SDan Williams #define for_each_clear_bit_le(bit, addr, size) \ 3004a826c83SDan Williams for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ 3014a826c83SDan Williams (bit) < (size); \ 3024a826c83SDan Williams (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) 3034a826c83SDan Williams 3044a826c83SDan Williams /** 305f524bf27SDan Williams * preamble_index - common variable initialization for nd_label_* routines 3064a826c83SDan Williams * @ndd: dimm container for the relevant label set 307f524bf27SDan Williams * @idx: namespace_index index 3084a826c83SDan Williams * @nsindex_out: on return set to the currently active namespace index 3094a826c83SDan Williams * @free: on return set to the free label bitmap in the index 3104a826c83SDan Williams * @nslot: on return set to the number of slots in the label space 3114a826c83SDan Williams */ 312f524bf27SDan Williams static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, 3134a826c83SDan Williams struct nd_namespace_index **nsindex_out, 3144a826c83SDan Williams unsigned long **free, u32 *nslot) 3154a826c83SDan Williams { 3164a826c83SDan Williams struct nd_namespace_index *nsindex; 3174a826c83SDan Williams 318f524bf27SDan Williams nsindex = to_namespace_index(ndd, idx); 3194a826c83SDan Williams if (nsindex == NULL) 3204a826c83SDan Williams return false; 3214a826c83SDan Williams 3224a826c83SDan Williams *free = (unsigned long *) nsindex->free; 3234a826c83SDan Williams *nslot = __le32_to_cpu(nsindex->nslot); 3244a826c83SDan Williams *nsindex_out = nsindex; 3254a826c83SDan Williams 3264a826c83SDan Williams return true; 3274a826c83SDan Williams } 3284a826c83SDan Williams 329bf9bccc1SDan Williams char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) 3304a826c83SDan Williams { 3314a826c83SDan Williams if (!label_id || !uuid) 3324a826c83SDan Williams return NULL; 3334a826c83SDan Williams snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", 3344a826c83SDan Williams flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); 3354a826c83SDan Williams return label_id->id; 3364a826c83SDan Williams } 3374a826c83SDan Williams 338f524bf27SDan Williams static bool preamble_current(struct nvdimm_drvdata *ndd, 339f524bf27SDan Williams struct nd_namespace_index **nsindex, 340f524bf27SDan Williams unsigned long **free, u32 *nslot) 341f524bf27SDan Williams { 342f524bf27SDan Williams return preamble_index(ndd, ndd->ns_current, nsindex, 343f524bf27SDan Williams free, nslot); 344f524bf27SDan Williams } 345f524bf27SDan Williams 346f524bf27SDan Williams static bool preamble_next(struct nvdimm_drvdata *ndd, 347f524bf27SDan Williams struct nd_namespace_index **nsindex, 348f524bf27SDan Williams unsigned long **free, u32 *nslot) 349f524bf27SDan Williams { 350f524bf27SDan Williams return preamble_index(ndd, ndd->ns_next, nsindex, 351f524bf27SDan Williams free, nslot); 352f524bf27SDan Williams } 353f524bf27SDan Williams 354355d8388SDan Williams static bool slot_valid(struct nvdimm_drvdata *ndd, 355355d8388SDan Williams struct nd_namespace_label *nd_label, u32 slot) 3564a826c83SDan Williams { 3574a826c83SDan Williams /* check that we are written where we expect to be written */ 3584a826c83SDan Williams if (slot != __le32_to_cpu(nd_label->slot)) 3594a826c83SDan Williams return false; 3604a826c83SDan Williams 3614a826c83SDan Williams /* check that DPA allocations are page aligned */ 3624a826c83SDan Williams if ((__le64_to_cpu(nd_label->dpa) 3634a826c83SDan Williams | __le64_to_cpu(nd_label->rawsize)) % SZ_4K) 3644a826c83SDan Williams return false; 3654a826c83SDan Williams 366355d8388SDan Williams /* check checksum */ 367355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 368355d8388SDan Williams u64 sum, sum_save; 369355d8388SDan Williams 370355d8388SDan Williams sum_save = __le64_to_cpu(nd_label->checksum); 371355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 372355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 373355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum_save); 374355d8388SDan Williams if (sum != sum_save) { 375426824d6SDan Williams dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n", 376426824d6SDan Williams slot, sum); 377355d8388SDan Williams return false; 378355d8388SDan Williams } 379355d8388SDan Williams } 380355d8388SDan Williams 3814a826c83SDan Williams return true; 3824a826c83SDan Williams } 3834a826c83SDan Williams 3844a826c83SDan Williams int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) 3854a826c83SDan Williams { 3864a826c83SDan Williams struct nd_namespace_index *nsindex; 3874a826c83SDan Williams unsigned long *free; 3884a826c83SDan Williams u32 nslot, slot; 3894a826c83SDan Williams 3904a826c83SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 3914a826c83SDan Williams return 0; /* no label, nothing to reserve */ 3924a826c83SDan Williams 3934a826c83SDan Williams for_each_clear_bit_le(slot, free, nslot) { 3944a826c83SDan Williams struct nd_namespace_label *nd_label; 3954a826c83SDan Williams struct nd_region *nd_region = NULL; 3964a826c83SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 3974a826c83SDan Williams struct nd_label_id label_id; 3984a826c83SDan Williams struct resource *res; 3994a826c83SDan Williams u32 flags; 4004a826c83SDan Williams 401564e871aSDan Williams nd_label = to_label(ndd, slot); 4024a826c83SDan Williams 403355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 4044a826c83SDan Williams continue; 4054a826c83SDan Williams 4064a826c83SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 4074a826c83SDan Williams flags = __le32_to_cpu(nd_label->flags); 4084a826c83SDan Williams nd_label_gen_id(&label_id, label_uuid, flags); 4094a826c83SDan Williams res = nvdimm_allocate_dpa(ndd, &label_id, 4104a826c83SDan Williams __le64_to_cpu(nd_label->dpa), 4114a826c83SDan Williams __le64_to_cpu(nd_label->rawsize)); 4124a826c83SDan Williams nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); 4134a826c83SDan Williams if (!res) 4144a826c83SDan Williams return -EBUSY; 4154a826c83SDan Williams } 4164a826c83SDan Williams 4174a826c83SDan Williams return 0; 4184a826c83SDan Williams } 419bf9bccc1SDan Williams 420bf9bccc1SDan Williams int nd_label_active_count(struct nvdimm_drvdata *ndd) 421bf9bccc1SDan Williams { 422bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 423bf9bccc1SDan Williams unsigned long *free; 424bf9bccc1SDan Williams u32 nslot, slot; 425bf9bccc1SDan Williams int count = 0; 426bf9bccc1SDan Williams 427bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 428bf9bccc1SDan Williams return 0; 429bf9bccc1SDan Williams 430bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 431bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 432bf9bccc1SDan Williams 433564e871aSDan Williams nd_label = to_label(ndd, slot); 434bf9bccc1SDan Williams 435355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) { 436bf9bccc1SDan Williams u32 label_slot = __le32_to_cpu(nd_label->slot); 437bf9bccc1SDan Williams u64 size = __le64_to_cpu(nd_label->rawsize); 438bf9bccc1SDan Williams u64 dpa = __le64_to_cpu(nd_label->dpa); 439bf9bccc1SDan Williams 440bf9bccc1SDan Williams dev_dbg(ndd->dev, 441426824d6SDan Williams "slot%d invalid slot: %d dpa: %llx size: %llx\n", 442426824d6SDan Williams slot, label_slot, dpa, size); 443bf9bccc1SDan Williams continue; 444bf9bccc1SDan Williams } 445bf9bccc1SDan Williams count++; 446bf9bccc1SDan Williams } 447bf9bccc1SDan Williams return count; 448bf9bccc1SDan Williams } 449bf9bccc1SDan Williams 450bf9bccc1SDan Williams struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) 451bf9bccc1SDan Williams { 452bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 453bf9bccc1SDan Williams unsigned long *free; 454bf9bccc1SDan Williams u32 nslot, slot; 455bf9bccc1SDan Williams 456bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 457bf9bccc1SDan Williams return NULL; 458bf9bccc1SDan Williams 459bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 460bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 461bf9bccc1SDan Williams 462564e871aSDan Williams nd_label = to_label(ndd, slot); 463355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 464bf9bccc1SDan Williams continue; 465bf9bccc1SDan Williams 466bf9bccc1SDan Williams if (n-- == 0) 467564e871aSDan Williams return to_label(ndd, slot); 468bf9bccc1SDan Williams } 469bf9bccc1SDan Williams 470bf9bccc1SDan Williams return NULL; 471bf9bccc1SDan Williams } 472f524bf27SDan Williams 4730ba1c634SDan Williams u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) 474f524bf27SDan Williams { 475f524bf27SDan Williams struct nd_namespace_index *nsindex; 476f524bf27SDan Williams unsigned long *free; 477f524bf27SDan Williams u32 nslot, slot; 478f524bf27SDan Williams 479f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 480f524bf27SDan Williams return UINT_MAX; 481f524bf27SDan Williams 482f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 483f524bf27SDan Williams 484f524bf27SDan Williams slot = find_next_bit_le(free, nslot, 0); 485f524bf27SDan Williams if (slot == nslot) 486f524bf27SDan Williams return UINT_MAX; 487f524bf27SDan Williams 488f524bf27SDan Williams clear_bit_le(slot, free); 489f524bf27SDan Williams 490f524bf27SDan Williams return slot; 491f524bf27SDan Williams } 492f524bf27SDan Williams 4930ba1c634SDan Williams bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) 494f524bf27SDan Williams { 495f524bf27SDan Williams struct nd_namespace_index *nsindex; 496f524bf27SDan Williams unsigned long *free; 497f524bf27SDan Williams u32 nslot; 498f524bf27SDan Williams 499f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 500f524bf27SDan Williams return false; 501f524bf27SDan Williams 502f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 503f524bf27SDan Williams 504f524bf27SDan Williams if (slot < nslot) 505f524bf27SDan Williams return !test_and_set_bit_le(slot, free); 506f524bf27SDan Williams return false; 507f524bf27SDan Williams } 508f524bf27SDan Williams 509f524bf27SDan Williams u32 nd_label_nfree(struct nvdimm_drvdata *ndd) 510f524bf27SDan Williams { 511f524bf27SDan Williams struct nd_namespace_index *nsindex; 512f524bf27SDan Williams unsigned long *free; 513f524bf27SDan Williams u32 nslot; 514f524bf27SDan Williams 515f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 516f524bf27SDan Williams 517f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 5180ba1c634SDan Williams return nvdimm_num_label_slots(ndd); 519f524bf27SDan Williams 520f524bf27SDan Williams return bitmap_weight(free, nslot); 521f524bf27SDan Williams } 522f524bf27SDan Williams 523f524bf27SDan Williams static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, 524f524bf27SDan Williams unsigned long flags) 525f524bf27SDan Williams { 526f524bf27SDan Williams struct nd_namespace_index *nsindex; 527f524bf27SDan Williams unsigned long offset; 528f524bf27SDan Williams u64 checksum; 529f524bf27SDan Williams u32 nslot; 530f524bf27SDan Williams int rc; 531f524bf27SDan Williams 532f524bf27SDan Williams nsindex = to_namespace_index(ndd, index); 533f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 534f524bf27SDan Williams nslot = nvdimm_num_label_slots(ndd); 535f524bf27SDan Williams else 536f524bf27SDan Williams nslot = __le32_to_cpu(nsindex->nslot); 537f524bf27SDan Williams 538f524bf27SDan Williams memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); 539564e871aSDan Williams memset(&nsindex->flags, 0, 3); 540564e871aSDan Williams nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; 541f524bf27SDan Williams nsindex->seq = __cpu_to_le32(seq); 542f524bf27SDan Williams offset = (unsigned long) nsindex 543f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 544f524bf27SDan Williams nsindex->myoff = __cpu_to_le64(offset); 545f524bf27SDan Williams nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); 546f524bf27SDan Williams offset = (unsigned long) to_namespace_index(ndd, 547f524bf27SDan Williams nd_label_next_nsindex(index)) 548f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 549f524bf27SDan Williams nsindex->otheroff = __cpu_to_le64(offset); 550f524bf27SDan Williams offset = (unsigned long) nd_label_base(ndd) 551f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 552f524bf27SDan Williams nsindex->labeloff = __cpu_to_le64(offset); 553f524bf27SDan Williams nsindex->nslot = __cpu_to_le32(nslot); 554f524bf27SDan Williams nsindex->major = __cpu_to_le16(1); 5558990cdf1SDan Williams if (sizeof_namespace_label(ndd) < 256) 556f524bf27SDan Williams nsindex->minor = __cpu_to_le16(1); 5578990cdf1SDan Williams else 5588990cdf1SDan Williams nsindex->minor = __cpu_to_le16(2); 559f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(0); 560f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) { 561f524bf27SDan Williams unsigned long *free = (unsigned long *) nsindex->free; 562f524bf27SDan Williams u32 nfree = ALIGN(nslot, BITS_PER_LONG); 563f524bf27SDan Williams int last_bits, i; 564f524bf27SDan Williams 565f524bf27SDan Williams memset(nsindex->free, 0xff, nfree / 8); 566f524bf27SDan Williams for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) 567f524bf27SDan Williams clear_bit_le(nslot + i, free); 568f524bf27SDan Williams } 569f524bf27SDan Williams checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); 570f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(checksum); 571f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), 572f524bf27SDan Williams nsindex, sizeof_namespace_index(ndd)); 573f524bf27SDan Williams if (rc < 0) 574f524bf27SDan Williams return rc; 575f524bf27SDan Williams 576f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 577f524bf27SDan Williams return 0; 578f524bf27SDan Williams 579f524bf27SDan Williams /* copy the index we just wrote to the new 'next' */ 580f524bf27SDan Williams WARN_ON(index != ndd->ns_next); 581f524bf27SDan Williams nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); 582f524bf27SDan Williams ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); 583f524bf27SDan Williams ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); 584f524bf27SDan Williams WARN_ON(ndd->ns_current == ndd->ns_next); 585f524bf27SDan Williams 586f524bf27SDan Williams return 0; 587f524bf27SDan Williams } 588f524bf27SDan Williams 589f524bf27SDan Williams static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, 590f524bf27SDan Williams struct nd_namespace_label *nd_label) 591f524bf27SDan Williams { 592f524bf27SDan Williams return (unsigned long) nd_label 593f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 594f524bf27SDan Williams } 595f524bf27SDan Williams 596b3fde74eSDan Williams enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) 597b3fde74eSDan Williams { 598b3fde74eSDan Williams if (guid_equal(guid, &nvdimm_btt_guid)) 599b3fde74eSDan Williams return NVDIMM_CCLASS_BTT; 60014e49454SVishal Verma else if (guid_equal(guid, &nvdimm_btt2_guid)) 60114e49454SVishal Verma return NVDIMM_CCLASS_BTT2; 602b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_pfn_guid)) 603b3fde74eSDan Williams return NVDIMM_CCLASS_PFN; 604b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_dax_guid)) 605b3fde74eSDan Williams return NVDIMM_CCLASS_DAX; 606b3fde74eSDan Williams else if (guid_equal(guid, &guid_null)) 607b3fde74eSDan Williams return NVDIMM_CCLASS_NONE; 608b3fde74eSDan Williams 609b3fde74eSDan Williams return NVDIMM_CCLASS_UNKNOWN; 610b3fde74eSDan Williams } 611b3fde74eSDan Williams 612b3fde74eSDan Williams static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, 613b3fde74eSDan Williams guid_t *target) 614b3fde74eSDan Williams { 615b3fde74eSDan Williams if (claim_class == NVDIMM_CCLASS_BTT) 616b3fde74eSDan Williams return &nvdimm_btt_guid; 61714e49454SVishal Verma else if (claim_class == NVDIMM_CCLASS_BTT2) 61814e49454SVishal Verma return &nvdimm_btt2_guid; 619b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_PFN) 620b3fde74eSDan Williams return &nvdimm_pfn_guid; 621b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_DAX) 622b3fde74eSDan Williams return &nvdimm_dax_guid; 623b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { 624b3fde74eSDan Williams /* 625b3fde74eSDan Williams * If we're modifying a namespace for which we don't 626b3fde74eSDan Williams * know the claim_class, don't touch the existing guid. 627b3fde74eSDan Williams */ 628b3fde74eSDan Williams return target; 629b3fde74eSDan Williams } else 630b3fde74eSDan Williams return &guid_null; 631b3fde74eSDan Williams } 632b3fde74eSDan Williams 633f524bf27SDan Williams static int __pmem_label_update(struct nd_region *nd_region, 634f524bf27SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, 635f524bf27SDan Williams int pos) 636f524bf27SDan Williams { 637b3fde74eSDan Williams struct nd_namespace_common *ndns = &nspm->nsio.common; 638faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 639f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 64016660eaeSDan Williams struct nd_label_ent *label_ent, *victim = NULL; 641f524bf27SDan Williams struct nd_namespace_label *nd_label; 642f524bf27SDan Williams struct nd_namespace_index *nsindex; 64316660eaeSDan Williams struct nd_label_id label_id; 64416660eaeSDan Williams struct resource *res; 645f524bf27SDan Williams unsigned long *free; 646f524bf27SDan Williams u32 nslot, slot; 647f524bf27SDan Williams size_t offset; 648c12c48ceSDan Williams u64 cookie; 649f524bf27SDan Williams int rc; 650f524bf27SDan Williams 651f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 652f524bf27SDan Williams return -ENXIO; 653f524bf27SDan Williams 654c12c48ceSDan Williams cookie = nd_region_interleave_set_cookie(nd_region, nsindex); 65516660eaeSDan Williams nd_label_gen_id(&label_id, nspm->uuid, 0); 65616660eaeSDan Williams for_each_dpa_resource(ndd, res) 65716660eaeSDan Williams if (strcmp(res->name, label_id.id) == 0) 65816660eaeSDan Williams break; 65916660eaeSDan Williams 66016660eaeSDan Williams if (!res) { 66116660eaeSDan Williams WARN_ON_ONCE(1); 66216660eaeSDan Williams return -ENXIO; 66316660eaeSDan Williams } 66416660eaeSDan Williams 665f524bf27SDan Williams /* allocate and write the label to the staging (next) index */ 666f524bf27SDan Williams slot = nd_label_alloc_slot(ndd); 667f524bf27SDan Williams if (slot == UINT_MAX) 668f524bf27SDan Williams return -ENXIO; 669426824d6SDan Williams dev_dbg(ndd->dev, "allocated: %d\n", slot); 670f524bf27SDan Williams 671564e871aSDan Williams nd_label = to_label(ndd, slot); 672564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 673f524bf27SDan Williams memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); 674f524bf27SDan Williams if (nspm->alt_name) 675f524bf27SDan Williams memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); 676f524bf27SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING); 677f524bf27SDan Williams nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); 678f524bf27SDan Williams nd_label->position = __cpu_to_le16(pos); 679f524bf27SDan Williams nd_label->isetcookie = __cpu_to_le64(cookie); 68016660eaeSDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 6812de5148fSDan Williams nd_label->lbasize = __cpu_to_le64(nspm->lbasize); 68216660eaeSDan Williams nd_label->dpa = __cpu_to_le64(res->start); 683f524bf27SDan Williams nd_label->slot = __cpu_to_le32(slot); 684faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 685faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 686b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 687b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 688b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 689b3fde74eSDan Williams &nd_label->abstraction_guid)); 690355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 691355d8388SDan Williams u64 sum; 692355d8388SDan Williams 693355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 694355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 695355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 696355d8388SDan Williams } 697426824d6SDan Williams nd_dbg_dpa(nd_region, ndd, res, "\n"); 698f524bf27SDan Williams 699f524bf27SDan Williams /* update label */ 700f524bf27SDan Williams offset = nd_label_offset(ndd, nd_label); 701f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 702564e871aSDan Williams sizeof_namespace_label(ndd)); 703f524bf27SDan Williams if (rc < 0) 704f524bf27SDan Williams return rc; 705f524bf27SDan Williams 706f524bf27SDan Williams /* Garbage collect the previous label */ 707ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 70816660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) { 70916660eaeSDan Williams if (!label_ent->label) 71016660eaeSDan Williams continue; 71116660eaeSDan Williams if (memcmp(nspm->uuid, label_ent->label->uuid, 71216660eaeSDan Williams NSLABEL_UUID_LEN) != 0) 71316660eaeSDan Williams continue; 71416660eaeSDan Williams victim = label_ent; 71516660eaeSDan Williams list_move_tail(&victim->list, &nd_mapping->labels); 71616660eaeSDan Williams break; 71716660eaeSDan Williams } 71816660eaeSDan Williams if (victim) { 719426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 72016660eaeSDan Williams slot = to_slot(ndd, victim->label); 72116660eaeSDan Williams nd_label_free_slot(ndd, slot); 72216660eaeSDan Williams victim->label = NULL; 723f524bf27SDan Williams } 724f524bf27SDan Williams 725f524bf27SDan Williams /* update index */ 726f524bf27SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 727f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 72816660eaeSDan Williams if (rc == 0) { 72916660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 73016660eaeSDan Williams if (!label_ent->label) { 731ae8219f1SDan Williams label_ent->label = nd_label; 73216660eaeSDan Williams nd_label = NULL; 73316660eaeSDan Williams break; 73416660eaeSDan Williams } 73516660eaeSDan Williams dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, 73616660eaeSDan Williams "failed to track label: %d\n", 73716660eaeSDan Williams to_slot(ndd, nd_label)); 73816660eaeSDan Williams if (nd_label) 73916660eaeSDan Williams rc = -ENXIO; 74016660eaeSDan Williams } 741ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 742ae8219f1SDan Williams 743f524bf27SDan Williams return rc; 7440ba1c634SDan Williams } 7450ba1c634SDan Williams 7460ba1c634SDan Williams static bool is_old_resource(struct resource *res, struct resource **list, int n) 747f524bf27SDan Williams { 748f524bf27SDan Williams int i; 7490ba1c634SDan Williams 7500ba1c634SDan Williams if (res->flags & DPA_RESOURCE_ADJUSTED) 7510ba1c634SDan Williams return false; 7520ba1c634SDan Williams for (i = 0; i < n; i++) 7530ba1c634SDan Williams if (res == list[i]) 7540ba1c634SDan Williams return true; 7550ba1c634SDan Williams return false; 7560ba1c634SDan Williams } 7570ba1c634SDan Williams 7580ba1c634SDan Williams static struct resource *to_resource(struct nvdimm_drvdata *ndd, 7590ba1c634SDan Williams struct nd_namespace_label *nd_label) 7600ba1c634SDan Williams { 7610ba1c634SDan Williams struct resource *res; 7620ba1c634SDan Williams 7630ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7640ba1c634SDan Williams if (res->start != __le64_to_cpu(nd_label->dpa)) 7650ba1c634SDan Williams continue; 7660ba1c634SDan Williams if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) 7670ba1c634SDan Williams continue; 7680ba1c634SDan Williams return res; 7690ba1c634SDan Williams } 7700ba1c634SDan Williams 7710ba1c634SDan Williams return NULL; 7720ba1c634SDan Williams } 7730ba1c634SDan Williams 7740ba1c634SDan Williams /* 7750ba1c634SDan Williams * 1/ Account all the labels that can be freed after this update 7760ba1c634SDan Williams * 2/ Allocate and write the label to the staging (next) index 7770ba1c634SDan Williams * 3/ Record the resources in the namespace device 7780ba1c634SDan Williams */ 7790ba1c634SDan Williams static int __blk_label_update(struct nd_region *nd_region, 7800ba1c634SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, 7810ba1c634SDan Williams int num_labels) 7820ba1c634SDan Williams { 783ae8219f1SDan Williams int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; 784faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 785b3fde74eSDan Williams struct nd_namespace_common *ndns = &nsblk->common; 786f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 7870ba1c634SDan Williams struct nd_namespace_label *nd_label; 788ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 7890ba1c634SDan Williams struct nd_namespace_index *nsindex; 7900ba1c634SDan Williams unsigned long *free, *victim_map = NULL; 7910ba1c634SDan Williams struct resource *res, **old_res_list; 7920ba1c634SDan Williams struct nd_label_id label_id; 7930ba1c634SDan Williams u8 uuid[NSLABEL_UUID_LEN]; 7943934d841SDan Williams int min_dpa_idx = 0; 795ae8219f1SDan Williams LIST_HEAD(list); 7960ba1c634SDan Williams u32 nslot, slot; 797f524bf27SDan Williams 7980ba1c634SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 7990ba1c634SDan Williams return -ENXIO; 800f524bf27SDan Williams 8010ba1c634SDan Williams old_res_list = nsblk->res; 8020ba1c634SDan Williams nfree = nd_label_nfree(ndd); 8030ba1c634SDan Williams old_num_resources = nsblk->num_resources; 8040ba1c634SDan Williams nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); 8050ba1c634SDan Williams 8060ba1c634SDan Williams /* 8070ba1c634SDan Williams * We need to loop over the old resources a few times, which seems a 8080ba1c634SDan Williams * bit inefficient, but we need to know that we have the label 8090ba1c634SDan Williams * space before we start mutating the tracking structures. 8100ba1c634SDan Williams * Otherwise the recovery method of last resort for userspace is 8110ba1c634SDan Williams * disable and re-enable the parent region. 8120ba1c634SDan Williams */ 8130ba1c634SDan Williams alloc = 0; 8140ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 8150ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 8160ba1c634SDan Williams continue; 8170ba1c634SDan Williams if (!is_old_resource(res, old_res_list, old_num_resources)) 8180ba1c634SDan Williams alloc++; 8190ba1c634SDan Williams } 8200ba1c634SDan Williams 8210ba1c634SDan Williams victims = 0; 8220ba1c634SDan Williams if (old_num_resources) { 8230ba1c634SDan Williams /* convert old local-label-map to dimm-slot victim-map */ 8240ba1c634SDan Williams victim_map = kcalloc(BITS_TO_LONGS(nslot), sizeof(long), 8250ba1c634SDan Williams GFP_KERNEL); 8260ba1c634SDan Williams if (!victim_map) 8270ba1c634SDan Williams return -ENOMEM; 8280ba1c634SDan Williams 8290ba1c634SDan Williams /* mark unused labels for garbage collection */ 8300ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 831564e871aSDan Williams nd_label = to_label(ndd, slot); 8320ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 8330ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 8340ba1c634SDan Williams continue; 8350ba1c634SDan Williams res = to_resource(ndd, nd_label); 8360ba1c634SDan Williams if (res && is_old_resource(res, old_res_list, 8370ba1c634SDan Williams old_num_resources)) 8380ba1c634SDan Williams continue; 8390ba1c634SDan Williams slot = to_slot(ndd, nd_label); 8400ba1c634SDan Williams set_bit(slot, victim_map); 8410ba1c634SDan Williams victims++; 8420ba1c634SDan Williams } 8430ba1c634SDan Williams } 8440ba1c634SDan Williams 8450ba1c634SDan Williams /* don't allow updates that consume the last label */ 8460ba1c634SDan Williams if (nfree - alloc < 0 || nfree - alloc + victims < 1) { 8478c2f7e86SDan Williams dev_info(&nsblk->common.dev, "insufficient label space\n"); 8480ba1c634SDan Williams kfree(victim_map); 8490ba1c634SDan Williams return -ENOSPC; 8500ba1c634SDan Williams } 8510ba1c634SDan Williams /* from here on we need to abort on error */ 8520ba1c634SDan Williams 8530ba1c634SDan Williams 8540ba1c634SDan Williams /* assign all resources to the namespace before writing the labels */ 8550ba1c634SDan Williams nsblk->res = NULL; 8560ba1c634SDan Williams nsblk->num_resources = 0; 8570ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 8580ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 8590ba1c634SDan Williams continue; 8600ba1c634SDan Williams if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { 8610ba1c634SDan Williams rc = -ENOMEM; 8620ba1c634SDan Williams goto abort; 8630ba1c634SDan Williams } 8640ba1c634SDan Williams } 8650ba1c634SDan Williams 8663934d841SDan Williams /* 8673934d841SDan Williams * Find the resource associated with the first label in the set 8683934d841SDan Williams * per the v1.2 namespace specification. 8693934d841SDan Williams */ 8703934d841SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8713934d841SDan Williams struct resource *min = nsblk->res[min_dpa_idx]; 8723934d841SDan Williams 8733934d841SDan Williams res = nsblk->res[i]; 8743934d841SDan Williams if (res->start < min->start) 8753934d841SDan Williams min_dpa_idx = i; 8763934d841SDan Williams } 8773934d841SDan Williams 8780ba1c634SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8790ba1c634SDan Williams size_t offset; 8800ba1c634SDan Williams 8810ba1c634SDan Williams res = nsblk->res[i]; 8820ba1c634SDan Williams if (is_old_resource(res, old_res_list, old_num_resources)) 8830ba1c634SDan Williams continue; /* carry-over */ 8840ba1c634SDan Williams slot = nd_label_alloc_slot(ndd); 8850ba1c634SDan Williams if (slot == UINT_MAX) 8860ba1c634SDan Williams goto abort; 887426824d6SDan Williams dev_dbg(ndd->dev, "allocated: %d\n", slot); 8880ba1c634SDan Williams 889564e871aSDan Williams nd_label = to_label(ndd, slot); 890564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 8910ba1c634SDan Williams memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); 8920ba1c634SDan Williams if (nsblk->alt_name) 8930ba1c634SDan Williams memcpy(nd_label->name, nsblk->alt_name, 8940ba1c634SDan Williams NSLABEL_NAME_LEN); 8950ba1c634SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); 8968f2bc243SDan Williams 8978f2bc243SDan Williams /* 8988f2bc243SDan Williams * Use the presence of the type_guid as a flag to 8993934d841SDan Williams * determine isetcookie usage and nlabel + position 9003934d841SDan Williams * policy for blk-aperture namespaces. 9018f2bc243SDan Williams */ 9023934d841SDan Williams if (namespace_label_has(ndd, type_guid)) { 9033934d841SDan Williams if (i == min_dpa_idx) { 9043934d841SDan Williams nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); 9053934d841SDan Williams nd_label->position = __cpu_to_le16(0); 9063934d841SDan Williams } else { 9073934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0xffff); 9083934d841SDan Williams nd_label->position = __cpu_to_le16(0xffff); 9093934d841SDan Williams } 9108f2bc243SDan Williams nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); 9113934d841SDan Williams } else { 9123934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0); /* N/A */ 9133934d841SDan Williams nd_label->position = __cpu_to_le16(0); /* N/A */ 9140ba1c634SDan Williams nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ 9153934d841SDan Williams } 9168f2bc243SDan Williams 9170ba1c634SDan Williams nd_label->dpa = __cpu_to_le64(res->start); 9180ba1c634SDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 9190ba1c634SDan Williams nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); 9200ba1c634SDan Williams nd_label->slot = __cpu_to_le32(slot); 921faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 922faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 923b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 924b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 925b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 926b3fde74eSDan Williams &nd_label->abstraction_guid)); 927b3fde74eSDan Williams 928355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 929355d8388SDan Williams u64 sum; 930355d8388SDan Williams 931355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 932355d8388SDan Williams sum = nd_fletcher64(nd_label, 933355d8388SDan Williams sizeof_namespace_label(ndd), 1); 934355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 935355d8388SDan Williams } 9360ba1c634SDan Williams 9370ba1c634SDan Williams /* update label */ 9380ba1c634SDan Williams offset = nd_label_offset(ndd, nd_label); 9390ba1c634SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 940564e871aSDan Williams sizeof_namespace_label(ndd)); 9410ba1c634SDan Williams if (rc < 0) 9420ba1c634SDan Williams goto abort; 9430ba1c634SDan Williams } 9440ba1c634SDan Williams 9450ba1c634SDan Williams /* free up now unused slots in the new index */ 9460ba1c634SDan Williams for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { 947426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 9480ba1c634SDan Williams nd_label_free_slot(ndd, slot); 9490ba1c634SDan Williams } 9500ba1c634SDan Williams 9510ba1c634SDan Williams /* update index */ 9520ba1c634SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 9530ba1c634SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 9540ba1c634SDan Williams if (rc) 9550ba1c634SDan Williams goto abort; 9560ba1c634SDan Williams 9570ba1c634SDan Williams /* 9580ba1c634SDan Williams * Now that the on-dimm labels are up to date, fix up the tracking 9590ba1c634SDan Williams * entries in nd_mapping->labels 9600ba1c634SDan Williams */ 9610ba1c634SDan Williams nlabel = 0; 962ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 963ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 964ae8219f1SDan Williams nd_label = label_ent->label; 965ae8219f1SDan Williams if (!nd_label) 966ae8219f1SDan Williams continue; 9670ba1c634SDan Williams nlabel++; 9680ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9690ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9700ba1c634SDan Williams continue; 9710ba1c634SDan Williams nlabel--; 972ae8219f1SDan Williams list_move(&label_ent->list, &list); 973ae8219f1SDan Williams label_ent->label = NULL; 9740ba1c634SDan Williams } 975ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 976ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 977ae8219f1SDan Williams 9780ba1c634SDan Williams if (nlabel + nsblk->num_resources > num_labels) { 9790ba1c634SDan Williams /* 9800ba1c634SDan Williams * Bug, we can't end up with more resources than 9810ba1c634SDan Williams * available labels 9820ba1c634SDan Williams */ 9830ba1c634SDan Williams WARN_ON_ONCE(1); 9840ba1c634SDan Williams rc = -ENXIO; 9850ba1c634SDan Williams goto out; 9860ba1c634SDan Williams } 9870ba1c634SDan Williams 988ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 989ae8219f1SDan Williams label_ent = list_first_entry_or_null(&nd_mapping->labels, 990ae8219f1SDan Williams typeof(*label_ent), list); 991ae8219f1SDan Williams if (!label_ent) { 992ae8219f1SDan Williams WARN_ON(1); 993ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 994ae8219f1SDan Williams rc = -ENXIO; 995ae8219f1SDan Williams goto out; 996ae8219f1SDan Williams } 9970ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 998564e871aSDan Williams nd_label = to_label(ndd, slot); 9990ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 10000ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 10010ba1c634SDan Williams continue; 10020ba1c634SDan Williams res = to_resource(ndd, nd_label); 10030ba1c634SDan Williams res->flags &= ~DPA_RESOURCE_ADJUSTED; 1004ae8219f1SDan Williams dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); 1005ae8219f1SDan Williams list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { 1006ae8219f1SDan Williams if (label_ent->label) 1007ae8219f1SDan Williams continue; 1008ae8219f1SDan Williams label_ent->label = nd_label; 1009ae8219f1SDan Williams nd_label = NULL; 1010ae8219f1SDan Williams break; 10110ba1c634SDan Williams } 1012ae8219f1SDan Williams if (nd_label) 1013ae8219f1SDan Williams dev_WARN(&nsblk->common.dev, 1014ae8219f1SDan Williams "failed to track label slot%d\n", slot); 1015ae8219f1SDan Williams } 1016ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10170ba1c634SDan Williams 10180ba1c634SDan Williams out: 10190ba1c634SDan Williams kfree(old_res_list); 10200ba1c634SDan Williams kfree(victim_map); 10210ba1c634SDan Williams return rc; 10220ba1c634SDan Williams 10230ba1c634SDan Williams abort: 10240ba1c634SDan Williams /* 10250ba1c634SDan Williams * 1/ repair the allocated label bitmap in the index 10260ba1c634SDan Williams * 2/ restore the resource list 10270ba1c634SDan Williams */ 10280ba1c634SDan Williams nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); 10290ba1c634SDan Williams kfree(nsblk->res); 10300ba1c634SDan Williams nsblk->res = old_res_list; 10310ba1c634SDan Williams nsblk->num_resources = old_num_resources; 10320ba1c634SDan Williams old_res_list = NULL; 10330ba1c634SDan Williams goto out; 10340ba1c634SDan Williams } 10350ba1c634SDan Williams 10360ba1c634SDan Williams static int init_labels(struct nd_mapping *nd_mapping, int num_labels) 10370ba1c634SDan Williams { 1038ae8219f1SDan Williams int i, old_num_labels = 0; 1039ae8219f1SDan Williams struct nd_label_ent *label_ent; 10400ba1c634SDan Williams struct nd_namespace_index *nsindex; 10410ba1c634SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 10420ba1c634SDan Williams 1043ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1044ae8219f1SDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 10450ba1c634SDan Williams old_num_labels++; 1046ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10470ba1c634SDan Williams 10480ba1c634SDan Williams /* 10490ba1c634SDan Williams * We need to preserve all the old labels for the mapping so 10500ba1c634SDan Williams * they can be garbage collected after writing the new labels. 10510ba1c634SDan Williams */ 1052ae8219f1SDan Williams for (i = old_num_labels; i < num_labels; i++) { 1053ae8219f1SDan Williams label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); 1054ae8219f1SDan Williams if (!label_ent) 10550ba1c634SDan Williams return -ENOMEM; 1056ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1057ae8219f1SDan Williams list_add_tail(&label_ent->list, &nd_mapping->labels); 1058ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10590ba1c634SDan Williams } 10600ba1c634SDan Williams 1061f524bf27SDan Williams if (ndd->ns_current == -1 || ndd->ns_next == -1) 1062f524bf27SDan Williams /* pass */; 1063f524bf27SDan Williams else 10640ba1c634SDan Williams return max(num_labels, old_num_labels); 1065f524bf27SDan Williams 1066f524bf27SDan Williams nsindex = to_namespace_index(ndd, 0); 1067f524bf27SDan Williams memset(nsindex, 0, ndd->nsarea.config_size); 1068f524bf27SDan Williams for (i = 0; i < 2; i++) { 1069b18d4b8aSDan Williams int rc = nd_label_write_index(ndd, i, 3 - i, ND_NSINDEX_INIT); 1070f524bf27SDan Williams 1071f524bf27SDan Williams if (rc) 1072f524bf27SDan Williams return rc; 1073f524bf27SDan Williams } 1074f524bf27SDan Williams ndd->ns_next = 1; 1075f524bf27SDan Williams ndd->ns_current = 0; 1076f524bf27SDan Williams 10770ba1c634SDan Williams return max(num_labels, old_num_labels); 1078f524bf27SDan Williams } 1079f524bf27SDan Williams 1080f524bf27SDan Williams static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) 1081f524bf27SDan Williams { 1082f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 1083ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 1084f524bf27SDan Williams struct nd_namespace_index *nsindex; 1085f524bf27SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 1086f524bf27SDan Williams unsigned long *free; 1087ae8219f1SDan Williams LIST_HEAD(list); 1088f524bf27SDan Williams u32 nslot, slot; 1089ae8219f1SDan Williams int active = 0; 1090f524bf27SDan Williams 1091f524bf27SDan Williams if (!uuid) 1092f524bf27SDan Williams return 0; 1093f524bf27SDan Williams 1094f524bf27SDan Williams /* no index || no labels == nothing to delete */ 1095ae8219f1SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 1096f524bf27SDan Williams return 0; 1097f524bf27SDan Williams 1098ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1099ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 1100ae8219f1SDan Williams struct nd_namespace_label *nd_label = label_ent->label; 1101ae8219f1SDan Williams 1102ae8219f1SDan Williams if (!nd_label) 1103ae8219f1SDan Williams continue; 1104ae8219f1SDan Williams active++; 1105f524bf27SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 1106f524bf27SDan Williams if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) 1107f524bf27SDan Williams continue; 1108ae8219f1SDan Williams active--; 1109f524bf27SDan Williams slot = to_slot(ndd, nd_label); 1110f524bf27SDan Williams nd_label_free_slot(ndd, slot); 1111426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 1112ae8219f1SDan Williams list_move_tail(&label_ent->list, &list); 1113ae8219f1SDan Williams label_ent->label = NULL; 1114f524bf27SDan Williams } 1115ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 1116f524bf27SDan Williams 1117ae8219f1SDan Williams if (active == 0) { 1118ae8219f1SDan Williams nd_mapping_free_labels(nd_mapping); 1119426824d6SDan Williams dev_dbg(ndd->dev, "no more active labels\n"); 1120f524bf27SDan Williams } 1121ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1122f524bf27SDan Williams 1123f524bf27SDan Williams return nd_label_write_index(ndd, ndd->ns_next, 1124f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 1125f524bf27SDan Williams } 1126f524bf27SDan Williams 1127f524bf27SDan Williams int nd_pmem_namespace_label_update(struct nd_region *nd_region, 1128f524bf27SDan Williams struct nd_namespace_pmem *nspm, resource_size_t size) 1129f524bf27SDan Williams { 1130f524bf27SDan Williams int i; 1131f524bf27SDan Williams 1132f524bf27SDan Williams for (i = 0; i < nd_region->ndr_mappings; i++) { 1133f524bf27SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 113416660eaeSDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 113516660eaeSDan Williams struct resource *res; 113616660eaeSDan Williams int rc, count = 0; 1137f524bf27SDan Williams 1138f524bf27SDan Williams if (size == 0) { 1139f524bf27SDan Williams rc = del_labels(nd_mapping, nspm->uuid); 1140f524bf27SDan Williams if (rc) 1141f524bf27SDan Williams return rc; 1142f524bf27SDan Williams continue; 1143f524bf27SDan Williams } 1144f524bf27SDan Williams 114516660eaeSDan Williams for_each_dpa_resource(ndd, res) 11462d9a0274SNicolas Iooss if (strncmp(res->name, "pmem", 4) == 0) 114716660eaeSDan Williams count++; 114816660eaeSDan Williams WARN_ON_ONCE(!count); 114916660eaeSDan Williams 115016660eaeSDan Williams rc = init_labels(nd_mapping, count); 11510ba1c634SDan Williams if (rc < 0) 1152f524bf27SDan Williams return rc; 1153f524bf27SDan Williams 1154f524bf27SDan Williams rc = __pmem_label_update(nd_region, nd_mapping, nspm, i); 1155f524bf27SDan Williams if (rc) 1156f524bf27SDan Williams return rc; 1157f524bf27SDan Williams } 1158f524bf27SDan Williams 1159f524bf27SDan Williams return 0; 1160f524bf27SDan Williams } 11610ba1c634SDan Williams 11620ba1c634SDan Williams int nd_blk_namespace_label_update(struct nd_region *nd_region, 11630ba1c634SDan Williams struct nd_namespace_blk *nsblk, resource_size_t size) 11640ba1c634SDan Williams { 11650ba1c634SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[0]; 11660ba1c634SDan Williams struct resource *res; 11670ba1c634SDan Williams int count = 0; 11680ba1c634SDan Williams 11690ba1c634SDan Williams if (size == 0) 11700ba1c634SDan Williams return del_labels(nd_mapping, nsblk->uuid); 11710ba1c634SDan Williams 11720ba1c634SDan Williams for_each_dpa_resource(to_ndd(nd_mapping), res) 11730ba1c634SDan Williams count++; 11740ba1c634SDan Williams 11750ba1c634SDan Williams count = init_labels(nd_mapping, count); 11760ba1c634SDan Williams if (count < 0) 11770ba1c634SDan Williams return count; 11780ba1c634SDan Williams 11790ba1c634SDan Williams return __blk_label_update(nd_region, nd_mapping, nsblk, count); 11800ba1c634SDan Williams } 1181b3fde74eSDan Williams 1182b3fde74eSDan Williams int __init nd_label_init(void) 1183b3fde74eSDan Williams { 1184b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); 118514e49454SVishal Verma WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); 1186b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); 1187b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); 1188b3fde74eSDan Williams 1189b3fde74eSDan Williams return 0; 1190b3fde74eSDan Williams } 1191