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> 15*b3fde74eSDan 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 23*b3fde74eSDan Williams static guid_t nvdimm_btt_guid; 24*b3fde74eSDan Williams static guid_t nvdimm_pfn_guid; 25*b3fde74eSDan Williams static guid_t nvdimm_dax_guid; 26*b3fde74eSDan Williams 274a826c83SDan Williams static u32 best_seq(u32 a, u32 b) 284a826c83SDan Williams { 294a826c83SDan Williams a &= NSINDEX_SEQ_MASK; 304a826c83SDan Williams b &= NSINDEX_SEQ_MASK; 314a826c83SDan Williams 324a826c83SDan Williams if (a == 0 || a == b) 334a826c83SDan Williams return b; 344a826c83SDan Williams else if (b == 0) 354a826c83SDan Williams return a; 364a826c83SDan Williams else if (nd_inc_seq(a) == b) 374a826c83SDan Williams return b; 384a826c83SDan Williams else 394a826c83SDan Williams return a; 404a826c83SDan Williams } 414a826c83SDan Williams 42564e871aSDan Williams unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) 43564e871aSDan Williams { 44564e871aSDan Williams return ndd->nslabel_size; 45564e871aSDan Williams } 46564e871aSDan Williams 474a826c83SDan Williams size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) 484a826c83SDan Williams { 494a826c83SDan Williams u32 index_span; 504a826c83SDan Williams 514a826c83SDan Williams if (ndd->nsindex_size) 524a826c83SDan Williams return ndd->nsindex_size; 534a826c83SDan Williams 544a826c83SDan Williams /* 554a826c83SDan Williams * The minimum index space is 512 bytes, with that amount of 564a826c83SDan Williams * index we can describe ~1400 labels which is less than a byte 574a826c83SDan Williams * of overhead per label. Round up to a byte of overhead per 584a826c83SDan Williams * label and determine the size of the index region. Yes, this 594a826c83SDan Williams * starts to waste space at larger config_sizes, but it's 604a826c83SDan Williams * unlikely we'll ever see anything but 128K. 614a826c83SDan Williams */ 62564e871aSDan Williams index_span = ndd->nsarea.config_size / (sizeof_namespace_label(ndd) + 1); 634a826c83SDan Williams index_span /= NSINDEX_ALIGN * 2; 644a826c83SDan Williams ndd->nsindex_size = index_span * NSINDEX_ALIGN; 654a826c83SDan Williams 664a826c83SDan Williams return ndd->nsindex_size; 674a826c83SDan Williams } 684a826c83SDan Williams 690ba1c634SDan Williams int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) 70f524bf27SDan Williams { 71564e871aSDan Williams return ndd->nsarea.config_size / (sizeof_namespace_label(ndd) + 1); 72f524bf27SDan Williams } 73f524bf27SDan Williams 74564e871aSDan Williams static int __nd_label_validate(struct nvdimm_drvdata *ndd) 754a826c83SDan Williams { 764a826c83SDan Williams /* 774a826c83SDan Williams * On media label format consists of two index blocks followed 784a826c83SDan Williams * by an array of labels. None of these structures are ever 794a826c83SDan Williams * updated in place. A sequence number tracks the current 804a826c83SDan Williams * active index and the next one to write, while labels are 814a826c83SDan Williams * written to free slots. 824a826c83SDan Williams * 834a826c83SDan Williams * +------------+ 844a826c83SDan Williams * | | 854a826c83SDan Williams * | nsindex0 | 864a826c83SDan Williams * | | 874a826c83SDan Williams * +------------+ 884a826c83SDan Williams * | | 894a826c83SDan Williams * | nsindex1 | 904a826c83SDan Williams * | | 914a826c83SDan Williams * +------------+ 924a826c83SDan Williams * | label0 | 934a826c83SDan Williams * +------------+ 944a826c83SDan Williams * | label1 | 954a826c83SDan Williams * +------------+ 964a826c83SDan Williams * | | 974a826c83SDan Williams * ....nslot... 984a826c83SDan Williams * | | 994a826c83SDan Williams * +------------+ 1004a826c83SDan Williams * | labelN | 1014a826c83SDan Williams * +------------+ 1024a826c83SDan Williams */ 1034a826c83SDan Williams struct nd_namespace_index *nsindex[] = { 1044a826c83SDan Williams to_namespace_index(ndd, 0), 1054a826c83SDan Williams to_namespace_index(ndd, 1), 1064a826c83SDan Williams }; 1074a826c83SDan Williams const int num_index = ARRAY_SIZE(nsindex); 1084a826c83SDan Williams struct device *dev = ndd->dev; 1094a826c83SDan Williams bool valid[2] = { 0 }; 1104a826c83SDan Williams int i, num_valid = 0; 1114a826c83SDan Williams u32 seq; 1124a826c83SDan Williams 1134a826c83SDan Williams for (i = 0; i < num_index; i++) { 1144a826c83SDan Williams u32 nslot; 1154a826c83SDan Williams u8 sig[NSINDEX_SIG_LEN]; 1164a826c83SDan Williams u64 sum_save, sum, size; 117564e871aSDan Williams unsigned int version, labelsize; 1184a826c83SDan Williams 1194a826c83SDan Williams memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); 1204a826c83SDan Williams if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) { 1214a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d signature invalid\n", 1224a826c83SDan Williams __func__, i); 1234a826c83SDan Williams continue; 1244a826c83SDan Williams } 125564e871aSDan Williams 126564e871aSDan Williams /* label sizes larger than 128 arrived with v1.2 */ 127564e871aSDan Williams version = __le16_to_cpu(nsindex[i]->major) * 100 128564e871aSDan Williams + __le16_to_cpu(nsindex[i]->minor); 129564e871aSDan Williams if (version >= 102) 130564e871aSDan Williams labelsize = 1 << (7 + nsindex[i]->labelsize); 131564e871aSDan Williams else 132564e871aSDan Williams labelsize = 128; 133564e871aSDan Williams 134564e871aSDan Williams if (labelsize != sizeof_namespace_label(ndd)) { 135564e871aSDan Williams dev_dbg(dev, "%s: nsindex%d labelsize %d invalid\n", 136564e871aSDan Williams __func__, i, nsindex[i]->labelsize); 137564e871aSDan Williams continue; 138564e871aSDan Williams } 139564e871aSDan Williams 1404a826c83SDan Williams sum_save = __le64_to_cpu(nsindex[i]->checksum); 1414a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(0); 1424a826c83SDan Williams sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1); 1434a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(sum_save); 1444a826c83SDan Williams if (sum != sum_save) { 1454a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d checksum invalid\n", 1464a826c83SDan Williams __func__, i); 1474a826c83SDan Williams continue; 1484a826c83SDan Williams } 1494a826c83SDan Williams 1504a826c83SDan Williams seq = __le32_to_cpu(nsindex[i]->seq); 1514a826c83SDan Williams if ((seq & NSINDEX_SEQ_MASK) == 0) { 1524a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d sequence: %#x invalid\n", 1534a826c83SDan Williams __func__, i, seq); 1544a826c83SDan Williams continue; 1554a826c83SDan Williams } 1564a826c83SDan Williams 1574a826c83SDan Williams /* sanity check the index against expected values */ 1584a826c83SDan Williams if (__le64_to_cpu(nsindex[i]->myoff) 1594a826c83SDan Williams != i * sizeof_namespace_index(ndd)) { 1604a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d myoff: %#llx invalid\n", 1614a826c83SDan Williams __func__, i, (unsigned long long) 1624a826c83SDan Williams __le64_to_cpu(nsindex[i]->myoff)); 1634a826c83SDan Williams continue; 1644a826c83SDan Williams } 1654a826c83SDan Williams if (__le64_to_cpu(nsindex[i]->otheroff) 1664a826c83SDan Williams != (!i) * sizeof_namespace_index(ndd)) { 1674a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d otheroff: %#llx invalid\n", 1684a826c83SDan Williams __func__, i, (unsigned long long) 1694a826c83SDan Williams __le64_to_cpu(nsindex[i]->otheroff)); 1704a826c83SDan Williams continue; 1714a826c83SDan Williams } 1724a826c83SDan Williams 1734a826c83SDan Williams size = __le64_to_cpu(nsindex[i]->mysize); 1744a826c83SDan Williams if (size > sizeof_namespace_index(ndd) 1754a826c83SDan Williams || size < sizeof(struct nd_namespace_index)) { 1764a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d mysize: %#llx invalid\n", 1774a826c83SDan Williams __func__, i, size); 1784a826c83SDan Williams continue; 1794a826c83SDan Williams } 1804a826c83SDan Williams 1814a826c83SDan Williams nslot = __le32_to_cpu(nsindex[i]->nslot); 182564e871aSDan Williams if (nslot * sizeof_namespace_label(ndd) 1834a826c83SDan Williams + 2 * sizeof_namespace_index(ndd) 1844a826c83SDan Williams > ndd->nsarea.config_size) { 1854a826c83SDan Williams dev_dbg(dev, "%s: nsindex%d nslot: %u invalid, config_size: %#x\n", 1864a826c83SDan Williams __func__, i, nslot, 1874a826c83SDan Williams ndd->nsarea.config_size); 1884a826c83SDan Williams continue; 1894a826c83SDan Williams } 1904a826c83SDan Williams valid[i] = true; 1914a826c83SDan Williams num_valid++; 1924a826c83SDan Williams } 1934a826c83SDan Williams 1944a826c83SDan Williams switch (num_valid) { 1954a826c83SDan Williams case 0: 1964a826c83SDan Williams break; 1974a826c83SDan Williams case 1: 1984a826c83SDan Williams for (i = 0; i < num_index; i++) 1994a826c83SDan Williams if (valid[i]) 2004a826c83SDan Williams return i; 2014a826c83SDan Williams /* can't have num_valid > 0 but valid[] = { false, false } */ 2024a826c83SDan Williams WARN_ON(1); 2034a826c83SDan Williams break; 2044a826c83SDan Williams default: 2054a826c83SDan Williams /* pick the best index... */ 2064a826c83SDan Williams seq = best_seq(__le32_to_cpu(nsindex[0]->seq), 2074a826c83SDan Williams __le32_to_cpu(nsindex[1]->seq)); 2084a826c83SDan Williams if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) 2094a826c83SDan Williams return 1; 2104a826c83SDan Williams else 2114a826c83SDan Williams return 0; 2124a826c83SDan Williams break; 2134a826c83SDan Williams } 2144a826c83SDan Williams 2154a826c83SDan Williams return -1; 2164a826c83SDan Williams } 2174a826c83SDan Williams 218564e871aSDan Williams int nd_label_validate(struct nvdimm_drvdata *ndd) 219564e871aSDan Williams { 220564e871aSDan Williams /* 221564e871aSDan Williams * In order to probe for and validate namespace index blocks we 222564e871aSDan Williams * need to know the size of the labels, and we can't trust the 223564e871aSDan Williams * size of the labels until we validate the index blocks. 224564e871aSDan Williams * Resolve this dependency loop by probing for known label 225564e871aSDan Williams * sizes. 226564e871aSDan Williams */ 227564e871aSDan Williams int label_size[] = { 256, 128 }; 228564e871aSDan Williams int i, rc; 229564e871aSDan Williams 230564e871aSDan Williams for (i = 0; i < ARRAY_SIZE(label_size); i++) { 231564e871aSDan Williams ndd->nslabel_size = label_size[i]; 232564e871aSDan Williams rc = __nd_label_validate(ndd); 233564e871aSDan Williams if (rc >= 0) 234564e871aSDan Williams return rc; 235564e871aSDan Williams } 236564e871aSDan Williams 237564e871aSDan Williams return -1; 238564e871aSDan Williams } 239564e871aSDan Williams 2404a826c83SDan Williams void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst, 2414a826c83SDan Williams struct nd_namespace_index *src) 2424a826c83SDan Williams { 2434a826c83SDan Williams if (dst && src) 2444a826c83SDan Williams /* pass */; 2454a826c83SDan Williams else 2464a826c83SDan Williams return; 2474a826c83SDan Williams 2484a826c83SDan Williams memcpy(dst, src, sizeof_namespace_index(ndd)); 2494a826c83SDan Williams } 2504a826c83SDan Williams 2514a826c83SDan Williams static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) 2524a826c83SDan Williams { 2534a826c83SDan Williams void *base = to_namespace_index(ndd, 0); 2544a826c83SDan Williams 2554a826c83SDan Williams return base + 2 * sizeof_namespace_index(ndd); 2564a826c83SDan Williams } 2574a826c83SDan Williams 258f524bf27SDan Williams static int to_slot(struct nvdimm_drvdata *ndd, 259f524bf27SDan Williams struct nd_namespace_label *nd_label) 260f524bf27SDan Williams { 261564e871aSDan Williams unsigned long label, base; 262564e871aSDan Williams 263564e871aSDan Williams label = (unsigned long) nd_label; 264564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 265564e871aSDan Williams 266564e871aSDan Williams return (label - base) / sizeof_namespace_label(ndd); 267564e871aSDan Williams } 268564e871aSDan Williams 269564e871aSDan Williams static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) 270564e871aSDan Williams { 271564e871aSDan Williams unsigned long label, base; 272564e871aSDan Williams 273564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 274564e871aSDan Williams label = base + sizeof_namespace_label(ndd) * slot; 275564e871aSDan Williams 276564e871aSDan Williams return (struct nd_namespace_label *) label; 277f524bf27SDan Williams } 278f524bf27SDan Williams 2794a826c83SDan Williams #define for_each_clear_bit_le(bit, addr, size) \ 2804a826c83SDan Williams for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ 2814a826c83SDan Williams (bit) < (size); \ 2824a826c83SDan Williams (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) 2834a826c83SDan Williams 2844a826c83SDan Williams /** 285f524bf27SDan Williams * preamble_index - common variable initialization for nd_label_* routines 2864a826c83SDan Williams * @ndd: dimm container for the relevant label set 287f524bf27SDan Williams * @idx: namespace_index index 2884a826c83SDan Williams * @nsindex_out: on return set to the currently active namespace index 2894a826c83SDan Williams * @free: on return set to the free label bitmap in the index 2904a826c83SDan Williams * @nslot: on return set to the number of slots in the label space 2914a826c83SDan Williams */ 292f524bf27SDan Williams static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, 2934a826c83SDan Williams struct nd_namespace_index **nsindex_out, 2944a826c83SDan Williams unsigned long **free, u32 *nslot) 2954a826c83SDan Williams { 2964a826c83SDan Williams struct nd_namespace_index *nsindex; 2974a826c83SDan Williams 298f524bf27SDan Williams nsindex = to_namespace_index(ndd, idx); 2994a826c83SDan Williams if (nsindex == NULL) 3004a826c83SDan Williams return false; 3014a826c83SDan Williams 3024a826c83SDan Williams *free = (unsigned long *) nsindex->free; 3034a826c83SDan Williams *nslot = __le32_to_cpu(nsindex->nslot); 3044a826c83SDan Williams *nsindex_out = nsindex; 3054a826c83SDan Williams 3064a826c83SDan Williams return true; 3074a826c83SDan Williams } 3084a826c83SDan Williams 309bf9bccc1SDan Williams char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) 3104a826c83SDan Williams { 3114a826c83SDan Williams if (!label_id || !uuid) 3124a826c83SDan Williams return NULL; 3134a826c83SDan Williams snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", 3144a826c83SDan Williams flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); 3154a826c83SDan Williams return label_id->id; 3164a826c83SDan Williams } 3174a826c83SDan Williams 318f524bf27SDan Williams static bool preamble_current(struct nvdimm_drvdata *ndd, 319f524bf27SDan Williams struct nd_namespace_index **nsindex, 320f524bf27SDan Williams unsigned long **free, u32 *nslot) 321f524bf27SDan Williams { 322f524bf27SDan Williams return preamble_index(ndd, ndd->ns_current, nsindex, 323f524bf27SDan Williams free, nslot); 324f524bf27SDan Williams } 325f524bf27SDan Williams 326f524bf27SDan Williams static bool preamble_next(struct nvdimm_drvdata *ndd, 327f524bf27SDan Williams struct nd_namespace_index **nsindex, 328f524bf27SDan Williams unsigned long **free, u32 *nslot) 329f524bf27SDan Williams { 330f524bf27SDan Williams return preamble_index(ndd, ndd->ns_next, nsindex, 331f524bf27SDan Williams free, nslot); 332f524bf27SDan Williams } 333f524bf27SDan Williams 334355d8388SDan Williams static bool slot_valid(struct nvdimm_drvdata *ndd, 335355d8388SDan Williams struct nd_namespace_label *nd_label, u32 slot) 3364a826c83SDan Williams { 3374a826c83SDan Williams /* check that we are written where we expect to be written */ 3384a826c83SDan Williams if (slot != __le32_to_cpu(nd_label->slot)) 3394a826c83SDan Williams return false; 3404a826c83SDan Williams 3414a826c83SDan Williams /* check that DPA allocations are page aligned */ 3424a826c83SDan Williams if ((__le64_to_cpu(nd_label->dpa) 3434a826c83SDan Williams | __le64_to_cpu(nd_label->rawsize)) % SZ_4K) 3444a826c83SDan Williams return false; 3454a826c83SDan Williams 346355d8388SDan Williams /* check checksum */ 347355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 348355d8388SDan Williams u64 sum, sum_save; 349355d8388SDan Williams 350355d8388SDan Williams sum_save = __le64_to_cpu(nd_label->checksum); 351355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 352355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 353355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum_save); 354355d8388SDan Williams if (sum != sum_save) { 355355d8388SDan Williams dev_dbg(ndd->dev, "%s fail checksum. slot: %d expect: %#llx\n", 356355d8388SDan Williams __func__, slot, sum); 357355d8388SDan Williams return false; 358355d8388SDan Williams } 359355d8388SDan Williams } 360355d8388SDan Williams 3614a826c83SDan Williams return true; 3624a826c83SDan Williams } 3634a826c83SDan Williams 3644a826c83SDan Williams int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) 3654a826c83SDan Williams { 3664a826c83SDan Williams struct nd_namespace_index *nsindex; 3674a826c83SDan Williams unsigned long *free; 3684a826c83SDan Williams u32 nslot, slot; 3694a826c83SDan Williams 3704a826c83SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 3714a826c83SDan Williams return 0; /* no label, nothing to reserve */ 3724a826c83SDan Williams 3734a826c83SDan Williams for_each_clear_bit_le(slot, free, nslot) { 3744a826c83SDan Williams struct nd_namespace_label *nd_label; 3754a826c83SDan Williams struct nd_region *nd_region = NULL; 3764a826c83SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 3774a826c83SDan Williams struct nd_label_id label_id; 3784a826c83SDan Williams struct resource *res; 3794a826c83SDan Williams u32 flags; 3804a826c83SDan Williams 381564e871aSDan Williams nd_label = to_label(ndd, slot); 3824a826c83SDan Williams 383355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 3844a826c83SDan Williams continue; 3854a826c83SDan Williams 3864a826c83SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 3874a826c83SDan Williams flags = __le32_to_cpu(nd_label->flags); 3884a826c83SDan Williams nd_label_gen_id(&label_id, label_uuid, flags); 3894a826c83SDan Williams res = nvdimm_allocate_dpa(ndd, &label_id, 3904a826c83SDan Williams __le64_to_cpu(nd_label->dpa), 3914a826c83SDan Williams __le64_to_cpu(nd_label->rawsize)); 3924a826c83SDan Williams nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); 3934a826c83SDan Williams if (!res) 3944a826c83SDan Williams return -EBUSY; 3954a826c83SDan Williams } 3964a826c83SDan Williams 3974a826c83SDan Williams return 0; 3984a826c83SDan Williams } 399bf9bccc1SDan Williams 400bf9bccc1SDan Williams int nd_label_active_count(struct nvdimm_drvdata *ndd) 401bf9bccc1SDan Williams { 402bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 403bf9bccc1SDan Williams unsigned long *free; 404bf9bccc1SDan Williams u32 nslot, slot; 405bf9bccc1SDan Williams int count = 0; 406bf9bccc1SDan Williams 407bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 408bf9bccc1SDan Williams return 0; 409bf9bccc1SDan Williams 410bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 411bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 412bf9bccc1SDan Williams 413564e871aSDan Williams nd_label = to_label(ndd, slot); 414bf9bccc1SDan Williams 415355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) { 416bf9bccc1SDan Williams u32 label_slot = __le32_to_cpu(nd_label->slot); 417bf9bccc1SDan Williams u64 size = __le64_to_cpu(nd_label->rawsize); 418bf9bccc1SDan Williams u64 dpa = __le64_to_cpu(nd_label->dpa); 419bf9bccc1SDan Williams 420bf9bccc1SDan Williams dev_dbg(ndd->dev, 421bf9bccc1SDan Williams "%s: slot%d invalid slot: %d dpa: %llx size: %llx\n", 422bf9bccc1SDan Williams __func__, slot, label_slot, dpa, size); 423bf9bccc1SDan Williams continue; 424bf9bccc1SDan Williams } 425bf9bccc1SDan Williams count++; 426bf9bccc1SDan Williams } 427bf9bccc1SDan Williams return count; 428bf9bccc1SDan Williams } 429bf9bccc1SDan Williams 430bf9bccc1SDan Williams struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) 431bf9bccc1SDan Williams { 432bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 433bf9bccc1SDan Williams unsigned long *free; 434bf9bccc1SDan Williams u32 nslot, slot; 435bf9bccc1SDan Williams 436bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 437bf9bccc1SDan Williams return NULL; 438bf9bccc1SDan Williams 439bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 440bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 441bf9bccc1SDan Williams 442564e871aSDan Williams nd_label = to_label(ndd, slot); 443355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 444bf9bccc1SDan Williams continue; 445bf9bccc1SDan Williams 446bf9bccc1SDan Williams if (n-- == 0) 447564e871aSDan Williams return to_label(ndd, slot); 448bf9bccc1SDan Williams } 449bf9bccc1SDan Williams 450bf9bccc1SDan Williams return NULL; 451bf9bccc1SDan Williams } 452f524bf27SDan Williams 4530ba1c634SDan Williams u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) 454f524bf27SDan Williams { 455f524bf27SDan Williams struct nd_namespace_index *nsindex; 456f524bf27SDan Williams unsigned long *free; 457f524bf27SDan Williams u32 nslot, slot; 458f524bf27SDan Williams 459f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 460f524bf27SDan Williams return UINT_MAX; 461f524bf27SDan Williams 462f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 463f524bf27SDan Williams 464f524bf27SDan Williams slot = find_next_bit_le(free, nslot, 0); 465f524bf27SDan Williams if (slot == nslot) 466f524bf27SDan Williams return UINT_MAX; 467f524bf27SDan Williams 468f524bf27SDan Williams clear_bit_le(slot, free); 469f524bf27SDan Williams 470f524bf27SDan Williams return slot; 471f524bf27SDan Williams } 472f524bf27SDan Williams 4730ba1c634SDan Williams bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) 474f524bf27SDan Williams { 475f524bf27SDan Williams struct nd_namespace_index *nsindex; 476f524bf27SDan Williams unsigned long *free; 477f524bf27SDan Williams u32 nslot; 478f524bf27SDan Williams 479f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 480f524bf27SDan Williams return false; 481f524bf27SDan Williams 482f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 483f524bf27SDan Williams 484f524bf27SDan Williams if (slot < nslot) 485f524bf27SDan Williams return !test_and_set_bit_le(slot, free); 486f524bf27SDan Williams return false; 487f524bf27SDan Williams } 488f524bf27SDan Williams 489f524bf27SDan Williams u32 nd_label_nfree(struct nvdimm_drvdata *ndd) 490f524bf27SDan Williams { 491f524bf27SDan Williams struct nd_namespace_index *nsindex; 492f524bf27SDan Williams unsigned long *free; 493f524bf27SDan Williams u32 nslot; 494f524bf27SDan Williams 495f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 496f524bf27SDan Williams 497f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 4980ba1c634SDan Williams return nvdimm_num_label_slots(ndd); 499f524bf27SDan Williams 500f524bf27SDan Williams return bitmap_weight(free, nslot); 501f524bf27SDan Williams } 502f524bf27SDan Williams 503f524bf27SDan Williams static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, 504f524bf27SDan Williams unsigned long flags) 505f524bf27SDan Williams { 506f524bf27SDan Williams struct nd_namespace_index *nsindex; 507f524bf27SDan Williams unsigned long offset; 508f524bf27SDan Williams u64 checksum; 509f524bf27SDan Williams u32 nslot; 510f524bf27SDan Williams int rc; 511f524bf27SDan Williams 512f524bf27SDan Williams nsindex = to_namespace_index(ndd, index); 513f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 514f524bf27SDan Williams nslot = nvdimm_num_label_slots(ndd); 515f524bf27SDan Williams else 516f524bf27SDan Williams nslot = __le32_to_cpu(nsindex->nslot); 517f524bf27SDan Williams 518f524bf27SDan Williams memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); 519564e871aSDan Williams memset(&nsindex->flags, 0, 3); 520564e871aSDan Williams nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; 521f524bf27SDan Williams nsindex->seq = __cpu_to_le32(seq); 522f524bf27SDan Williams offset = (unsigned long) nsindex 523f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 524f524bf27SDan Williams nsindex->myoff = __cpu_to_le64(offset); 525f524bf27SDan Williams nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); 526f524bf27SDan Williams offset = (unsigned long) to_namespace_index(ndd, 527f524bf27SDan Williams nd_label_next_nsindex(index)) 528f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 529f524bf27SDan Williams nsindex->otheroff = __cpu_to_le64(offset); 530f524bf27SDan Williams offset = (unsigned long) nd_label_base(ndd) 531f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 532f524bf27SDan Williams nsindex->labeloff = __cpu_to_le64(offset); 533f524bf27SDan Williams nsindex->nslot = __cpu_to_le32(nslot); 534f524bf27SDan Williams nsindex->major = __cpu_to_le16(1); 535f524bf27SDan Williams nsindex->minor = __cpu_to_le16(1); 536f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(0); 537f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) { 538f524bf27SDan Williams unsigned long *free = (unsigned long *) nsindex->free; 539f524bf27SDan Williams u32 nfree = ALIGN(nslot, BITS_PER_LONG); 540f524bf27SDan Williams int last_bits, i; 541f524bf27SDan Williams 542f524bf27SDan Williams memset(nsindex->free, 0xff, nfree / 8); 543f524bf27SDan Williams for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) 544f524bf27SDan Williams clear_bit_le(nslot + i, free); 545f524bf27SDan Williams } 546f524bf27SDan Williams checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); 547f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(checksum); 548f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), 549f524bf27SDan Williams nsindex, sizeof_namespace_index(ndd)); 550f524bf27SDan Williams if (rc < 0) 551f524bf27SDan Williams return rc; 552f524bf27SDan Williams 553f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 554f524bf27SDan Williams return 0; 555f524bf27SDan Williams 556f524bf27SDan Williams /* copy the index we just wrote to the new 'next' */ 557f524bf27SDan Williams WARN_ON(index != ndd->ns_next); 558f524bf27SDan Williams nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); 559f524bf27SDan Williams ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); 560f524bf27SDan Williams ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); 561f524bf27SDan Williams WARN_ON(ndd->ns_current == ndd->ns_next); 562f524bf27SDan Williams 563f524bf27SDan Williams return 0; 564f524bf27SDan Williams } 565f524bf27SDan Williams 566f524bf27SDan Williams static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, 567f524bf27SDan Williams struct nd_namespace_label *nd_label) 568f524bf27SDan Williams { 569f524bf27SDan Williams return (unsigned long) nd_label 570f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 571f524bf27SDan Williams } 572f524bf27SDan Williams 573*b3fde74eSDan Williams enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) 574*b3fde74eSDan Williams { 575*b3fde74eSDan Williams if (guid_equal(guid, &nvdimm_btt_guid)) 576*b3fde74eSDan Williams return NVDIMM_CCLASS_BTT; 577*b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_pfn_guid)) 578*b3fde74eSDan Williams return NVDIMM_CCLASS_PFN; 579*b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_dax_guid)) 580*b3fde74eSDan Williams return NVDIMM_CCLASS_DAX; 581*b3fde74eSDan Williams else if (guid_equal(guid, &guid_null)) 582*b3fde74eSDan Williams return NVDIMM_CCLASS_NONE; 583*b3fde74eSDan Williams 584*b3fde74eSDan Williams return NVDIMM_CCLASS_UNKNOWN; 585*b3fde74eSDan Williams } 586*b3fde74eSDan Williams 587*b3fde74eSDan Williams static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, 588*b3fde74eSDan Williams guid_t *target) 589*b3fde74eSDan Williams { 590*b3fde74eSDan Williams if (claim_class == NVDIMM_CCLASS_BTT) 591*b3fde74eSDan Williams return &nvdimm_btt_guid; 592*b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_PFN) 593*b3fde74eSDan Williams return &nvdimm_pfn_guid; 594*b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_DAX) 595*b3fde74eSDan Williams return &nvdimm_dax_guid; 596*b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { 597*b3fde74eSDan Williams /* 598*b3fde74eSDan Williams * If we're modifying a namespace for which we don't 599*b3fde74eSDan Williams * know the claim_class, don't touch the existing guid. 600*b3fde74eSDan Williams */ 601*b3fde74eSDan Williams return target; 602*b3fde74eSDan Williams } else 603*b3fde74eSDan Williams return &guid_null; 604*b3fde74eSDan Williams } 605*b3fde74eSDan Williams 606f524bf27SDan Williams static int __pmem_label_update(struct nd_region *nd_region, 607f524bf27SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, 608f524bf27SDan Williams int pos) 609f524bf27SDan Williams { 610*b3fde74eSDan Williams struct nd_namespace_common *ndns = &nspm->nsio.common; 611faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 612f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 61316660eaeSDan Williams struct nd_label_ent *label_ent, *victim = NULL; 614f524bf27SDan Williams struct nd_namespace_label *nd_label; 615f524bf27SDan Williams struct nd_namespace_index *nsindex; 61616660eaeSDan Williams struct nd_label_id label_id; 61716660eaeSDan Williams struct resource *res; 618f524bf27SDan Williams unsigned long *free; 619f524bf27SDan Williams u32 nslot, slot; 620f524bf27SDan Williams size_t offset; 621c12c48ceSDan Williams u64 cookie; 622f524bf27SDan Williams int rc; 623f524bf27SDan Williams 624f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 625f524bf27SDan Williams return -ENXIO; 626f524bf27SDan Williams 627c12c48ceSDan Williams cookie = nd_region_interleave_set_cookie(nd_region, nsindex); 62816660eaeSDan Williams nd_label_gen_id(&label_id, nspm->uuid, 0); 62916660eaeSDan Williams for_each_dpa_resource(ndd, res) 63016660eaeSDan Williams if (strcmp(res->name, label_id.id) == 0) 63116660eaeSDan Williams break; 63216660eaeSDan Williams 63316660eaeSDan Williams if (!res) { 63416660eaeSDan Williams WARN_ON_ONCE(1); 63516660eaeSDan Williams return -ENXIO; 63616660eaeSDan Williams } 63716660eaeSDan Williams 638f524bf27SDan Williams /* allocate and write the label to the staging (next) index */ 639f524bf27SDan Williams slot = nd_label_alloc_slot(ndd); 640f524bf27SDan Williams if (slot == UINT_MAX) 641f524bf27SDan Williams return -ENXIO; 642f524bf27SDan Williams dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot); 643f524bf27SDan Williams 644564e871aSDan Williams nd_label = to_label(ndd, slot); 645564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 646f524bf27SDan Williams memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); 647f524bf27SDan Williams if (nspm->alt_name) 648f524bf27SDan Williams memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); 649f524bf27SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING); 650f524bf27SDan Williams nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); 651f524bf27SDan Williams nd_label->position = __cpu_to_le16(pos); 652f524bf27SDan Williams nd_label->isetcookie = __cpu_to_le64(cookie); 65316660eaeSDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 65416660eaeSDan Williams nd_label->dpa = __cpu_to_le64(res->start); 655f524bf27SDan Williams nd_label->slot = __cpu_to_le32(slot); 656faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 657faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 658*b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 659*b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 660*b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 661*b3fde74eSDan Williams &nd_label->abstraction_guid)); 662355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 663355d8388SDan Williams u64 sum; 664355d8388SDan Williams 665355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 666355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 667355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 668355d8388SDan Williams } 66916660eaeSDan Williams nd_dbg_dpa(nd_region, ndd, res, "%s\n", __func__); 670f524bf27SDan Williams 671f524bf27SDan Williams /* update label */ 672f524bf27SDan Williams offset = nd_label_offset(ndd, nd_label); 673f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 674564e871aSDan Williams sizeof_namespace_label(ndd)); 675f524bf27SDan Williams if (rc < 0) 676f524bf27SDan Williams return rc; 677f524bf27SDan Williams 678f524bf27SDan Williams /* Garbage collect the previous label */ 679ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 68016660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) { 68116660eaeSDan Williams if (!label_ent->label) 68216660eaeSDan Williams continue; 68316660eaeSDan Williams if (memcmp(nspm->uuid, label_ent->label->uuid, 68416660eaeSDan Williams NSLABEL_UUID_LEN) != 0) 68516660eaeSDan Williams continue; 68616660eaeSDan Williams victim = label_ent; 68716660eaeSDan Williams list_move_tail(&victim->list, &nd_mapping->labels); 68816660eaeSDan Williams break; 68916660eaeSDan Williams } 69016660eaeSDan Williams if (victim) { 691f524bf27SDan Williams dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); 69216660eaeSDan Williams slot = to_slot(ndd, victim->label); 69316660eaeSDan Williams nd_label_free_slot(ndd, slot); 69416660eaeSDan Williams victim->label = NULL; 695f524bf27SDan Williams } 696f524bf27SDan Williams 697f524bf27SDan Williams /* update index */ 698f524bf27SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 699f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 70016660eaeSDan Williams if (rc == 0) { 70116660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 70216660eaeSDan Williams if (!label_ent->label) { 703ae8219f1SDan Williams label_ent->label = nd_label; 70416660eaeSDan Williams nd_label = NULL; 70516660eaeSDan Williams break; 70616660eaeSDan Williams } 70716660eaeSDan Williams dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, 70816660eaeSDan Williams "failed to track label: %d\n", 70916660eaeSDan Williams to_slot(ndd, nd_label)); 71016660eaeSDan Williams if (nd_label) 71116660eaeSDan Williams rc = -ENXIO; 71216660eaeSDan Williams } 713ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 714ae8219f1SDan Williams 715f524bf27SDan Williams return rc; 7160ba1c634SDan Williams } 7170ba1c634SDan Williams 7180ba1c634SDan Williams static bool is_old_resource(struct resource *res, struct resource **list, int n) 719f524bf27SDan Williams { 720f524bf27SDan Williams int i; 7210ba1c634SDan Williams 7220ba1c634SDan Williams if (res->flags & DPA_RESOURCE_ADJUSTED) 7230ba1c634SDan Williams return false; 7240ba1c634SDan Williams for (i = 0; i < n; i++) 7250ba1c634SDan Williams if (res == list[i]) 7260ba1c634SDan Williams return true; 7270ba1c634SDan Williams return false; 7280ba1c634SDan Williams } 7290ba1c634SDan Williams 7300ba1c634SDan Williams static struct resource *to_resource(struct nvdimm_drvdata *ndd, 7310ba1c634SDan Williams struct nd_namespace_label *nd_label) 7320ba1c634SDan Williams { 7330ba1c634SDan Williams struct resource *res; 7340ba1c634SDan Williams 7350ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7360ba1c634SDan Williams if (res->start != __le64_to_cpu(nd_label->dpa)) 7370ba1c634SDan Williams continue; 7380ba1c634SDan Williams if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) 7390ba1c634SDan Williams continue; 7400ba1c634SDan Williams return res; 7410ba1c634SDan Williams } 7420ba1c634SDan Williams 7430ba1c634SDan Williams return NULL; 7440ba1c634SDan Williams } 7450ba1c634SDan Williams 7460ba1c634SDan Williams /* 7470ba1c634SDan Williams * 1/ Account all the labels that can be freed after this update 7480ba1c634SDan Williams * 2/ Allocate and write the label to the staging (next) index 7490ba1c634SDan Williams * 3/ Record the resources in the namespace device 7500ba1c634SDan Williams */ 7510ba1c634SDan Williams static int __blk_label_update(struct nd_region *nd_region, 7520ba1c634SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, 7530ba1c634SDan Williams int num_labels) 7540ba1c634SDan Williams { 755ae8219f1SDan Williams int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; 756faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 757*b3fde74eSDan Williams struct nd_namespace_common *ndns = &nsblk->common; 758f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 7590ba1c634SDan Williams struct nd_namespace_label *nd_label; 760ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 7610ba1c634SDan Williams struct nd_namespace_index *nsindex; 7620ba1c634SDan Williams unsigned long *free, *victim_map = NULL; 7630ba1c634SDan Williams struct resource *res, **old_res_list; 7640ba1c634SDan Williams struct nd_label_id label_id; 7650ba1c634SDan Williams u8 uuid[NSLABEL_UUID_LEN]; 7663934d841SDan Williams int min_dpa_idx = 0; 767ae8219f1SDan Williams LIST_HEAD(list); 7680ba1c634SDan Williams u32 nslot, slot; 769f524bf27SDan Williams 7700ba1c634SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 7710ba1c634SDan Williams return -ENXIO; 772f524bf27SDan Williams 7730ba1c634SDan Williams old_res_list = nsblk->res; 7740ba1c634SDan Williams nfree = nd_label_nfree(ndd); 7750ba1c634SDan Williams old_num_resources = nsblk->num_resources; 7760ba1c634SDan Williams nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); 7770ba1c634SDan Williams 7780ba1c634SDan Williams /* 7790ba1c634SDan Williams * We need to loop over the old resources a few times, which seems a 7800ba1c634SDan Williams * bit inefficient, but we need to know that we have the label 7810ba1c634SDan Williams * space before we start mutating the tracking structures. 7820ba1c634SDan Williams * Otherwise the recovery method of last resort for userspace is 7830ba1c634SDan Williams * disable and re-enable the parent region. 7840ba1c634SDan Williams */ 7850ba1c634SDan Williams alloc = 0; 7860ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7870ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 7880ba1c634SDan Williams continue; 7890ba1c634SDan Williams if (!is_old_resource(res, old_res_list, old_num_resources)) 7900ba1c634SDan Williams alloc++; 7910ba1c634SDan Williams } 7920ba1c634SDan Williams 7930ba1c634SDan Williams victims = 0; 7940ba1c634SDan Williams if (old_num_resources) { 7950ba1c634SDan Williams /* convert old local-label-map to dimm-slot victim-map */ 7960ba1c634SDan Williams victim_map = kcalloc(BITS_TO_LONGS(nslot), sizeof(long), 7970ba1c634SDan Williams GFP_KERNEL); 7980ba1c634SDan Williams if (!victim_map) 7990ba1c634SDan Williams return -ENOMEM; 8000ba1c634SDan Williams 8010ba1c634SDan Williams /* mark unused labels for garbage collection */ 8020ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 803564e871aSDan Williams nd_label = to_label(ndd, slot); 8040ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 8050ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 8060ba1c634SDan Williams continue; 8070ba1c634SDan Williams res = to_resource(ndd, nd_label); 8080ba1c634SDan Williams if (res && is_old_resource(res, old_res_list, 8090ba1c634SDan Williams old_num_resources)) 8100ba1c634SDan Williams continue; 8110ba1c634SDan Williams slot = to_slot(ndd, nd_label); 8120ba1c634SDan Williams set_bit(slot, victim_map); 8130ba1c634SDan Williams victims++; 8140ba1c634SDan Williams } 8150ba1c634SDan Williams } 8160ba1c634SDan Williams 8170ba1c634SDan Williams /* don't allow updates that consume the last label */ 8180ba1c634SDan Williams if (nfree - alloc < 0 || nfree - alloc + victims < 1) { 8198c2f7e86SDan Williams dev_info(&nsblk->common.dev, "insufficient label space\n"); 8200ba1c634SDan Williams kfree(victim_map); 8210ba1c634SDan Williams return -ENOSPC; 8220ba1c634SDan Williams } 8230ba1c634SDan Williams /* from here on we need to abort on error */ 8240ba1c634SDan Williams 8250ba1c634SDan Williams 8260ba1c634SDan Williams /* assign all resources to the namespace before writing the labels */ 8270ba1c634SDan Williams nsblk->res = NULL; 8280ba1c634SDan Williams nsblk->num_resources = 0; 8290ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 8300ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 8310ba1c634SDan Williams continue; 8320ba1c634SDan Williams if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { 8330ba1c634SDan Williams rc = -ENOMEM; 8340ba1c634SDan Williams goto abort; 8350ba1c634SDan Williams } 8360ba1c634SDan Williams } 8370ba1c634SDan Williams 8383934d841SDan Williams /* 8393934d841SDan Williams * Find the resource associated with the first label in the set 8403934d841SDan Williams * per the v1.2 namespace specification. 8413934d841SDan Williams */ 8423934d841SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8433934d841SDan Williams struct resource *min = nsblk->res[min_dpa_idx]; 8443934d841SDan Williams 8453934d841SDan Williams res = nsblk->res[i]; 8463934d841SDan Williams if (res->start < min->start) 8473934d841SDan Williams min_dpa_idx = i; 8483934d841SDan Williams } 8493934d841SDan Williams 8500ba1c634SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8510ba1c634SDan Williams size_t offset; 8520ba1c634SDan Williams 8530ba1c634SDan Williams res = nsblk->res[i]; 8540ba1c634SDan Williams if (is_old_resource(res, old_res_list, old_num_resources)) 8550ba1c634SDan Williams continue; /* carry-over */ 8560ba1c634SDan Williams slot = nd_label_alloc_slot(ndd); 8570ba1c634SDan Williams if (slot == UINT_MAX) 8580ba1c634SDan Williams goto abort; 8590ba1c634SDan Williams dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot); 8600ba1c634SDan Williams 861564e871aSDan Williams nd_label = to_label(ndd, slot); 862564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 8630ba1c634SDan Williams memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); 8640ba1c634SDan Williams if (nsblk->alt_name) 8650ba1c634SDan Williams memcpy(nd_label->name, nsblk->alt_name, 8660ba1c634SDan Williams NSLABEL_NAME_LEN); 8670ba1c634SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); 8688f2bc243SDan Williams 8698f2bc243SDan Williams /* 8708f2bc243SDan Williams * Use the presence of the type_guid as a flag to 8713934d841SDan Williams * determine isetcookie usage and nlabel + position 8723934d841SDan Williams * policy for blk-aperture namespaces. 8738f2bc243SDan Williams */ 8743934d841SDan Williams if (namespace_label_has(ndd, type_guid)) { 8753934d841SDan Williams if (i == min_dpa_idx) { 8763934d841SDan Williams nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); 8773934d841SDan Williams nd_label->position = __cpu_to_le16(0); 8783934d841SDan Williams } else { 8793934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0xffff); 8803934d841SDan Williams nd_label->position = __cpu_to_le16(0xffff); 8813934d841SDan Williams } 8828f2bc243SDan Williams nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); 8833934d841SDan Williams } else { 8843934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0); /* N/A */ 8853934d841SDan Williams nd_label->position = __cpu_to_le16(0); /* N/A */ 8860ba1c634SDan Williams nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ 8873934d841SDan Williams } 8888f2bc243SDan Williams 8890ba1c634SDan Williams nd_label->dpa = __cpu_to_le64(res->start); 8900ba1c634SDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 8910ba1c634SDan Williams nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); 8920ba1c634SDan Williams nd_label->slot = __cpu_to_le32(slot); 893faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 894faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 895*b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 896*b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 897*b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 898*b3fde74eSDan Williams &nd_label->abstraction_guid)); 899*b3fde74eSDan Williams 900355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 901355d8388SDan Williams u64 sum; 902355d8388SDan Williams 903355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 904355d8388SDan Williams sum = nd_fletcher64(nd_label, 905355d8388SDan Williams sizeof_namespace_label(ndd), 1); 906355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 907355d8388SDan Williams } 9080ba1c634SDan Williams 9090ba1c634SDan Williams /* update label */ 9100ba1c634SDan Williams offset = nd_label_offset(ndd, nd_label); 9110ba1c634SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 912564e871aSDan Williams sizeof_namespace_label(ndd)); 9130ba1c634SDan Williams if (rc < 0) 9140ba1c634SDan Williams goto abort; 9150ba1c634SDan Williams } 9160ba1c634SDan Williams 9170ba1c634SDan Williams /* free up now unused slots in the new index */ 9180ba1c634SDan Williams for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { 9190ba1c634SDan Williams dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); 9200ba1c634SDan Williams nd_label_free_slot(ndd, slot); 9210ba1c634SDan Williams } 9220ba1c634SDan Williams 9230ba1c634SDan Williams /* update index */ 9240ba1c634SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 9250ba1c634SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 9260ba1c634SDan Williams if (rc) 9270ba1c634SDan Williams goto abort; 9280ba1c634SDan Williams 9290ba1c634SDan Williams /* 9300ba1c634SDan Williams * Now that the on-dimm labels are up to date, fix up the tracking 9310ba1c634SDan Williams * entries in nd_mapping->labels 9320ba1c634SDan Williams */ 9330ba1c634SDan Williams nlabel = 0; 934ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 935ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 936ae8219f1SDan Williams nd_label = label_ent->label; 937ae8219f1SDan Williams if (!nd_label) 938ae8219f1SDan Williams continue; 9390ba1c634SDan Williams nlabel++; 9400ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9410ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9420ba1c634SDan Williams continue; 9430ba1c634SDan Williams nlabel--; 944ae8219f1SDan Williams list_move(&label_ent->list, &list); 945ae8219f1SDan Williams label_ent->label = NULL; 9460ba1c634SDan Williams } 947ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 948ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 949ae8219f1SDan Williams 9500ba1c634SDan Williams if (nlabel + nsblk->num_resources > num_labels) { 9510ba1c634SDan Williams /* 9520ba1c634SDan Williams * Bug, we can't end up with more resources than 9530ba1c634SDan Williams * available labels 9540ba1c634SDan Williams */ 9550ba1c634SDan Williams WARN_ON_ONCE(1); 9560ba1c634SDan Williams rc = -ENXIO; 9570ba1c634SDan Williams goto out; 9580ba1c634SDan Williams } 9590ba1c634SDan Williams 960ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 961ae8219f1SDan Williams label_ent = list_first_entry_or_null(&nd_mapping->labels, 962ae8219f1SDan Williams typeof(*label_ent), list); 963ae8219f1SDan Williams if (!label_ent) { 964ae8219f1SDan Williams WARN_ON(1); 965ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 966ae8219f1SDan Williams rc = -ENXIO; 967ae8219f1SDan Williams goto out; 968ae8219f1SDan Williams } 9690ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 970564e871aSDan Williams nd_label = to_label(ndd, slot); 9710ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9720ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9730ba1c634SDan Williams continue; 9740ba1c634SDan Williams res = to_resource(ndd, nd_label); 9750ba1c634SDan Williams res->flags &= ~DPA_RESOURCE_ADJUSTED; 976ae8219f1SDan Williams dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); 977ae8219f1SDan Williams list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { 978ae8219f1SDan Williams if (label_ent->label) 979ae8219f1SDan Williams continue; 980ae8219f1SDan Williams label_ent->label = nd_label; 981ae8219f1SDan Williams nd_label = NULL; 982ae8219f1SDan Williams break; 9830ba1c634SDan Williams } 984ae8219f1SDan Williams if (nd_label) 985ae8219f1SDan Williams dev_WARN(&nsblk->common.dev, 986ae8219f1SDan Williams "failed to track label slot%d\n", slot); 987ae8219f1SDan Williams } 988ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 9890ba1c634SDan Williams 9900ba1c634SDan Williams out: 9910ba1c634SDan Williams kfree(old_res_list); 9920ba1c634SDan Williams kfree(victim_map); 9930ba1c634SDan Williams return rc; 9940ba1c634SDan Williams 9950ba1c634SDan Williams abort: 9960ba1c634SDan Williams /* 9970ba1c634SDan Williams * 1/ repair the allocated label bitmap in the index 9980ba1c634SDan Williams * 2/ restore the resource list 9990ba1c634SDan Williams */ 10000ba1c634SDan Williams nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); 10010ba1c634SDan Williams kfree(nsblk->res); 10020ba1c634SDan Williams nsblk->res = old_res_list; 10030ba1c634SDan Williams nsblk->num_resources = old_num_resources; 10040ba1c634SDan Williams old_res_list = NULL; 10050ba1c634SDan Williams goto out; 10060ba1c634SDan Williams } 10070ba1c634SDan Williams 10080ba1c634SDan Williams static int init_labels(struct nd_mapping *nd_mapping, int num_labels) 10090ba1c634SDan Williams { 1010ae8219f1SDan Williams int i, old_num_labels = 0; 1011ae8219f1SDan Williams struct nd_label_ent *label_ent; 10120ba1c634SDan Williams struct nd_namespace_index *nsindex; 10130ba1c634SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 10140ba1c634SDan Williams 1015ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1016ae8219f1SDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 10170ba1c634SDan Williams old_num_labels++; 1018ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10190ba1c634SDan Williams 10200ba1c634SDan Williams /* 10210ba1c634SDan Williams * We need to preserve all the old labels for the mapping so 10220ba1c634SDan Williams * they can be garbage collected after writing the new labels. 10230ba1c634SDan Williams */ 1024ae8219f1SDan Williams for (i = old_num_labels; i < num_labels; i++) { 1025ae8219f1SDan Williams label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); 1026ae8219f1SDan Williams if (!label_ent) 10270ba1c634SDan Williams return -ENOMEM; 1028ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1029ae8219f1SDan Williams list_add_tail(&label_ent->list, &nd_mapping->labels); 1030ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10310ba1c634SDan Williams } 10320ba1c634SDan Williams 1033f524bf27SDan Williams if (ndd->ns_current == -1 || ndd->ns_next == -1) 1034f524bf27SDan Williams /* pass */; 1035f524bf27SDan Williams else 10360ba1c634SDan Williams return max(num_labels, old_num_labels); 1037f524bf27SDan Williams 1038f524bf27SDan Williams nsindex = to_namespace_index(ndd, 0); 1039f524bf27SDan Williams memset(nsindex, 0, ndd->nsarea.config_size); 1040f524bf27SDan Williams for (i = 0; i < 2; i++) { 1041f524bf27SDan Williams int rc = nd_label_write_index(ndd, i, i*2, ND_NSINDEX_INIT); 1042f524bf27SDan Williams 1043f524bf27SDan Williams if (rc) 1044f524bf27SDan Williams return rc; 1045f524bf27SDan Williams } 1046f524bf27SDan Williams ndd->ns_next = 1; 1047f524bf27SDan Williams ndd->ns_current = 0; 1048f524bf27SDan Williams 10490ba1c634SDan Williams return max(num_labels, old_num_labels); 1050f524bf27SDan Williams } 1051f524bf27SDan Williams 1052f524bf27SDan Williams static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) 1053f524bf27SDan Williams { 1054f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 1055ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 1056f524bf27SDan Williams struct nd_namespace_index *nsindex; 1057f524bf27SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 1058f524bf27SDan Williams unsigned long *free; 1059ae8219f1SDan Williams LIST_HEAD(list); 1060f524bf27SDan Williams u32 nslot, slot; 1061ae8219f1SDan Williams int active = 0; 1062f524bf27SDan Williams 1063f524bf27SDan Williams if (!uuid) 1064f524bf27SDan Williams return 0; 1065f524bf27SDan Williams 1066f524bf27SDan Williams /* no index || no labels == nothing to delete */ 1067ae8219f1SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 1068f524bf27SDan Williams return 0; 1069f524bf27SDan Williams 1070ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1071ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 1072ae8219f1SDan Williams struct nd_namespace_label *nd_label = label_ent->label; 1073ae8219f1SDan Williams 1074ae8219f1SDan Williams if (!nd_label) 1075ae8219f1SDan Williams continue; 1076ae8219f1SDan Williams active++; 1077f524bf27SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 1078f524bf27SDan Williams if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) 1079f524bf27SDan Williams continue; 1080ae8219f1SDan Williams active--; 1081f524bf27SDan Williams slot = to_slot(ndd, nd_label); 1082f524bf27SDan Williams nd_label_free_slot(ndd, slot); 1083f524bf27SDan Williams dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); 1084ae8219f1SDan Williams list_move_tail(&label_ent->list, &list); 1085ae8219f1SDan Williams label_ent->label = NULL; 1086f524bf27SDan Williams } 1087ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 1088f524bf27SDan Williams 1089ae8219f1SDan Williams if (active == 0) { 1090ae8219f1SDan Williams nd_mapping_free_labels(nd_mapping); 1091ae8219f1SDan Williams dev_dbg(ndd->dev, "%s: no more active labels\n", __func__); 1092f524bf27SDan Williams } 1093ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1094f524bf27SDan Williams 1095f524bf27SDan Williams return nd_label_write_index(ndd, ndd->ns_next, 1096f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 1097f524bf27SDan Williams } 1098f524bf27SDan Williams 1099f524bf27SDan Williams int nd_pmem_namespace_label_update(struct nd_region *nd_region, 1100f524bf27SDan Williams struct nd_namespace_pmem *nspm, resource_size_t size) 1101f524bf27SDan Williams { 1102f524bf27SDan Williams int i; 1103f524bf27SDan Williams 1104f524bf27SDan Williams for (i = 0; i < nd_region->ndr_mappings; i++) { 1105f524bf27SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 110616660eaeSDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 110716660eaeSDan Williams struct resource *res; 110816660eaeSDan Williams int rc, count = 0; 1109f524bf27SDan Williams 1110f524bf27SDan Williams if (size == 0) { 1111f524bf27SDan Williams rc = del_labels(nd_mapping, nspm->uuid); 1112f524bf27SDan Williams if (rc) 1113f524bf27SDan Williams return rc; 1114f524bf27SDan Williams continue; 1115f524bf27SDan Williams } 1116f524bf27SDan Williams 111716660eaeSDan Williams for_each_dpa_resource(ndd, res) 11182d9a0274SNicolas Iooss if (strncmp(res->name, "pmem", 4) == 0) 111916660eaeSDan Williams count++; 112016660eaeSDan Williams WARN_ON_ONCE(!count); 112116660eaeSDan Williams 112216660eaeSDan Williams rc = init_labels(nd_mapping, count); 11230ba1c634SDan Williams if (rc < 0) 1124f524bf27SDan Williams return rc; 1125f524bf27SDan Williams 1126f524bf27SDan Williams rc = __pmem_label_update(nd_region, nd_mapping, nspm, i); 1127f524bf27SDan Williams if (rc) 1128f524bf27SDan Williams return rc; 1129f524bf27SDan Williams } 1130f524bf27SDan Williams 1131f524bf27SDan Williams return 0; 1132f524bf27SDan Williams } 11330ba1c634SDan Williams 11340ba1c634SDan Williams int nd_blk_namespace_label_update(struct nd_region *nd_region, 11350ba1c634SDan Williams struct nd_namespace_blk *nsblk, resource_size_t size) 11360ba1c634SDan Williams { 11370ba1c634SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[0]; 11380ba1c634SDan Williams struct resource *res; 11390ba1c634SDan Williams int count = 0; 11400ba1c634SDan Williams 11410ba1c634SDan Williams if (size == 0) 11420ba1c634SDan Williams return del_labels(nd_mapping, nsblk->uuid); 11430ba1c634SDan Williams 11440ba1c634SDan Williams for_each_dpa_resource(to_ndd(nd_mapping), res) 11450ba1c634SDan Williams count++; 11460ba1c634SDan Williams 11470ba1c634SDan Williams count = init_labels(nd_mapping, count); 11480ba1c634SDan Williams if (count < 0) 11490ba1c634SDan Williams return count; 11500ba1c634SDan Williams 11510ba1c634SDan Williams return __blk_label_update(nd_region, nd_mapping, nsblk, count); 11520ba1c634SDan Williams } 1153*b3fde74eSDan Williams 1154*b3fde74eSDan Williams int __init nd_label_init(void) 1155*b3fde74eSDan Williams { 1156*b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); 1157*b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); 1158*b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); 1159*b3fde74eSDan Williams 1160*b3fde74eSDan Williams return 0; 1161*b3fde74eSDan Williams } 1162