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; 24b3fde74eSDan Williams static guid_t nvdimm_pfn_guid; 25b3fde74eSDan Williams static guid_t nvdimm_dax_guid; 26b3fde74eSDan 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 225*8990cdf1SDan Williams * sizes, but default to v1.2 256-byte namespace labels if 226*8990cdf1SDan Williams * discovery fails. 227564e871aSDan Williams */ 228*8990cdf1SDan Williams int label_size[] = { 128, 256 }; 229564e871aSDan Williams int i, rc; 230564e871aSDan Williams 231564e871aSDan Williams for (i = 0; i < ARRAY_SIZE(label_size); i++) { 232564e871aSDan Williams ndd->nslabel_size = label_size[i]; 233564e871aSDan Williams rc = __nd_label_validate(ndd); 234564e871aSDan Williams if (rc >= 0) 235564e871aSDan Williams return rc; 236564e871aSDan Williams } 237564e871aSDan Williams 238564e871aSDan Williams return -1; 239564e871aSDan Williams } 240564e871aSDan Williams 2414a826c83SDan Williams void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst, 2424a826c83SDan Williams struct nd_namespace_index *src) 2434a826c83SDan Williams { 2444a826c83SDan Williams if (dst && src) 2454a826c83SDan Williams /* pass */; 2464a826c83SDan Williams else 2474a826c83SDan Williams return; 2484a826c83SDan Williams 2494a826c83SDan Williams memcpy(dst, src, sizeof_namespace_index(ndd)); 2504a826c83SDan Williams } 2514a826c83SDan Williams 2524a826c83SDan Williams static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) 2534a826c83SDan Williams { 2544a826c83SDan Williams void *base = to_namespace_index(ndd, 0); 2554a826c83SDan Williams 2564a826c83SDan Williams return base + 2 * sizeof_namespace_index(ndd); 2574a826c83SDan Williams } 2584a826c83SDan Williams 259f524bf27SDan Williams static int to_slot(struct nvdimm_drvdata *ndd, 260f524bf27SDan Williams struct nd_namespace_label *nd_label) 261f524bf27SDan Williams { 262564e871aSDan Williams unsigned long label, base; 263564e871aSDan Williams 264564e871aSDan Williams label = (unsigned long) nd_label; 265564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 266564e871aSDan Williams 267564e871aSDan Williams return (label - base) / sizeof_namespace_label(ndd); 268564e871aSDan Williams } 269564e871aSDan Williams 270564e871aSDan Williams static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) 271564e871aSDan Williams { 272564e871aSDan Williams unsigned long label, base; 273564e871aSDan Williams 274564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 275564e871aSDan Williams label = base + sizeof_namespace_label(ndd) * slot; 276564e871aSDan Williams 277564e871aSDan Williams return (struct nd_namespace_label *) label; 278f524bf27SDan Williams } 279f524bf27SDan Williams 2804a826c83SDan Williams #define for_each_clear_bit_le(bit, addr, size) \ 2814a826c83SDan Williams for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ 2824a826c83SDan Williams (bit) < (size); \ 2834a826c83SDan Williams (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) 2844a826c83SDan Williams 2854a826c83SDan Williams /** 286f524bf27SDan Williams * preamble_index - common variable initialization for nd_label_* routines 2874a826c83SDan Williams * @ndd: dimm container for the relevant label set 288f524bf27SDan Williams * @idx: namespace_index index 2894a826c83SDan Williams * @nsindex_out: on return set to the currently active namespace index 2904a826c83SDan Williams * @free: on return set to the free label bitmap in the index 2914a826c83SDan Williams * @nslot: on return set to the number of slots in the label space 2924a826c83SDan Williams */ 293f524bf27SDan Williams static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, 2944a826c83SDan Williams struct nd_namespace_index **nsindex_out, 2954a826c83SDan Williams unsigned long **free, u32 *nslot) 2964a826c83SDan Williams { 2974a826c83SDan Williams struct nd_namespace_index *nsindex; 2984a826c83SDan Williams 299f524bf27SDan Williams nsindex = to_namespace_index(ndd, idx); 3004a826c83SDan Williams if (nsindex == NULL) 3014a826c83SDan Williams return false; 3024a826c83SDan Williams 3034a826c83SDan Williams *free = (unsigned long *) nsindex->free; 3044a826c83SDan Williams *nslot = __le32_to_cpu(nsindex->nslot); 3054a826c83SDan Williams *nsindex_out = nsindex; 3064a826c83SDan Williams 3074a826c83SDan Williams return true; 3084a826c83SDan Williams } 3094a826c83SDan Williams 310bf9bccc1SDan Williams char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) 3114a826c83SDan Williams { 3124a826c83SDan Williams if (!label_id || !uuid) 3134a826c83SDan Williams return NULL; 3144a826c83SDan Williams snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", 3154a826c83SDan Williams flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); 3164a826c83SDan Williams return label_id->id; 3174a826c83SDan Williams } 3184a826c83SDan Williams 319f524bf27SDan Williams static bool preamble_current(struct nvdimm_drvdata *ndd, 320f524bf27SDan Williams struct nd_namespace_index **nsindex, 321f524bf27SDan Williams unsigned long **free, u32 *nslot) 322f524bf27SDan Williams { 323f524bf27SDan Williams return preamble_index(ndd, ndd->ns_current, nsindex, 324f524bf27SDan Williams free, nslot); 325f524bf27SDan Williams } 326f524bf27SDan Williams 327f524bf27SDan Williams static bool preamble_next(struct nvdimm_drvdata *ndd, 328f524bf27SDan Williams struct nd_namespace_index **nsindex, 329f524bf27SDan Williams unsigned long **free, u32 *nslot) 330f524bf27SDan Williams { 331f524bf27SDan Williams return preamble_index(ndd, ndd->ns_next, nsindex, 332f524bf27SDan Williams free, nslot); 333f524bf27SDan Williams } 334f524bf27SDan Williams 335355d8388SDan Williams static bool slot_valid(struct nvdimm_drvdata *ndd, 336355d8388SDan Williams struct nd_namespace_label *nd_label, u32 slot) 3374a826c83SDan Williams { 3384a826c83SDan Williams /* check that we are written where we expect to be written */ 3394a826c83SDan Williams if (slot != __le32_to_cpu(nd_label->slot)) 3404a826c83SDan Williams return false; 3414a826c83SDan Williams 3424a826c83SDan Williams /* check that DPA allocations are page aligned */ 3434a826c83SDan Williams if ((__le64_to_cpu(nd_label->dpa) 3444a826c83SDan Williams | __le64_to_cpu(nd_label->rawsize)) % SZ_4K) 3454a826c83SDan Williams return false; 3464a826c83SDan Williams 347355d8388SDan Williams /* check checksum */ 348355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 349355d8388SDan Williams u64 sum, sum_save; 350355d8388SDan Williams 351355d8388SDan Williams sum_save = __le64_to_cpu(nd_label->checksum); 352355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 353355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 354355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum_save); 355355d8388SDan Williams if (sum != sum_save) { 356355d8388SDan Williams dev_dbg(ndd->dev, "%s fail checksum. slot: %d expect: %#llx\n", 357355d8388SDan Williams __func__, slot, sum); 358355d8388SDan Williams return false; 359355d8388SDan Williams } 360355d8388SDan Williams } 361355d8388SDan Williams 3624a826c83SDan Williams return true; 3634a826c83SDan Williams } 3644a826c83SDan Williams 3654a826c83SDan Williams int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) 3664a826c83SDan Williams { 3674a826c83SDan Williams struct nd_namespace_index *nsindex; 3684a826c83SDan Williams unsigned long *free; 3694a826c83SDan Williams u32 nslot, slot; 3704a826c83SDan Williams 3714a826c83SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 3724a826c83SDan Williams return 0; /* no label, nothing to reserve */ 3734a826c83SDan Williams 3744a826c83SDan Williams for_each_clear_bit_le(slot, free, nslot) { 3754a826c83SDan Williams struct nd_namespace_label *nd_label; 3764a826c83SDan Williams struct nd_region *nd_region = NULL; 3774a826c83SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 3784a826c83SDan Williams struct nd_label_id label_id; 3794a826c83SDan Williams struct resource *res; 3804a826c83SDan Williams u32 flags; 3814a826c83SDan Williams 382564e871aSDan Williams nd_label = to_label(ndd, slot); 3834a826c83SDan Williams 384355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 3854a826c83SDan Williams continue; 3864a826c83SDan Williams 3874a826c83SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 3884a826c83SDan Williams flags = __le32_to_cpu(nd_label->flags); 3894a826c83SDan Williams nd_label_gen_id(&label_id, label_uuid, flags); 3904a826c83SDan Williams res = nvdimm_allocate_dpa(ndd, &label_id, 3914a826c83SDan Williams __le64_to_cpu(nd_label->dpa), 3924a826c83SDan Williams __le64_to_cpu(nd_label->rawsize)); 3934a826c83SDan Williams nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); 3944a826c83SDan Williams if (!res) 3954a826c83SDan Williams return -EBUSY; 3964a826c83SDan Williams } 3974a826c83SDan Williams 3984a826c83SDan Williams return 0; 3994a826c83SDan Williams } 400bf9bccc1SDan Williams 401bf9bccc1SDan Williams int nd_label_active_count(struct nvdimm_drvdata *ndd) 402bf9bccc1SDan Williams { 403bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 404bf9bccc1SDan Williams unsigned long *free; 405bf9bccc1SDan Williams u32 nslot, slot; 406bf9bccc1SDan Williams int count = 0; 407bf9bccc1SDan Williams 408bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 409bf9bccc1SDan Williams return 0; 410bf9bccc1SDan Williams 411bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 412bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 413bf9bccc1SDan Williams 414564e871aSDan Williams nd_label = to_label(ndd, slot); 415bf9bccc1SDan Williams 416355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) { 417bf9bccc1SDan Williams u32 label_slot = __le32_to_cpu(nd_label->slot); 418bf9bccc1SDan Williams u64 size = __le64_to_cpu(nd_label->rawsize); 419bf9bccc1SDan Williams u64 dpa = __le64_to_cpu(nd_label->dpa); 420bf9bccc1SDan Williams 421bf9bccc1SDan Williams dev_dbg(ndd->dev, 422bf9bccc1SDan Williams "%s: slot%d invalid slot: %d dpa: %llx size: %llx\n", 423bf9bccc1SDan Williams __func__, slot, label_slot, dpa, size); 424bf9bccc1SDan Williams continue; 425bf9bccc1SDan Williams } 426bf9bccc1SDan Williams count++; 427bf9bccc1SDan Williams } 428bf9bccc1SDan Williams return count; 429bf9bccc1SDan Williams } 430bf9bccc1SDan Williams 431bf9bccc1SDan Williams struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) 432bf9bccc1SDan Williams { 433bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 434bf9bccc1SDan Williams unsigned long *free; 435bf9bccc1SDan Williams u32 nslot, slot; 436bf9bccc1SDan Williams 437bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 438bf9bccc1SDan Williams return NULL; 439bf9bccc1SDan Williams 440bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 441bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 442bf9bccc1SDan Williams 443564e871aSDan Williams nd_label = to_label(ndd, slot); 444355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 445bf9bccc1SDan Williams continue; 446bf9bccc1SDan Williams 447bf9bccc1SDan Williams if (n-- == 0) 448564e871aSDan Williams return to_label(ndd, slot); 449bf9bccc1SDan Williams } 450bf9bccc1SDan Williams 451bf9bccc1SDan Williams return NULL; 452bf9bccc1SDan Williams } 453f524bf27SDan Williams 4540ba1c634SDan Williams u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) 455f524bf27SDan Williams { 456f524bf27SDan Williams struct nd_namespace_index *nsindex; 457f524bf27SDan Williams unsigned long *free; 458f524bf27SDan Williams u32 nslot, slot; 459f524bf27SDan Williams 460f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 461f524bf27SDan Williams return UINT_MAX; 462f524bf27SDan Williams 463f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 464f524bf27SDan Williams 465f524bf27SDan Williams slot = find_next_bit_le(free, nslot, 0); 466f524bf27SDan Williams if (slot == nslot) 467f524bf27SDan Williams return UINT_MAX; 468f524bf27SDan Williams 469f524bf27SDan Williams clear_bit_le(slot, free); 470f524bf27SDan Williams 471f524bf27SDan Williams return slot; 472f524bf27SDan Williams } 473f524bf27SDan Williams 4740ba1c634SDan Williams bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) 475f524bf27SDan Williams { 476f524bf27SDan Williams struct nd_namespace_index *nsindex; 477f524bf27SDan Williams unsigned long *free; 478f524bf27SDan Williams u32 nslot; 479f524bf27SDan Williams 480f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 481f524bf27SDan Williams return false; 482f524bf27SDan Williams 483f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 484f524bf27SDan Williams 485f524bf27SDan Williams if (slot < nslot) 486f524bf27SDan Williams return !test_and_set_bit_le(slot, free); 487f524bf27SDan Williams return false; 488f524bf27SDan Williams } 489f524bf27SDan Williams 490f524bf27SDan Williams u32 nd_label_nfree(struct nvdimm_drvdata *ndd) 491f524bf27SDan Williams { 492f524bf27SDan Williams struct nd_namespace_index *nsindex; 493f524bf27SDan Williams unsigned long *free; 494f524bf27SDan Williams u32 nslot; 495f524bf27SDan Williams 496f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 497f524bf27SDan Williams 498f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 4990ba1c634SDan Williams return nvdimm_num_label_slots(ndd); 500f524bf27SDan Williams 501f524bf27SDan Williams return bitmap_weight(free, nslot); 502f524bf27SDan Williams } 503f524bf27SDan Williams 504f524bf27SDan Williams static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, 505f524bf27SDan Williams unsigned long flags) 506f524bf27SDan Williams { 507f524bf27SDan Williams struct nd_namespace_index *nsindex; 508f524bf27SDan Williams unsigned long offset; 509f524bf27SDan Williams u64 checksum; 510f524bf27SDan Williams u32 nslot; 511f524bf27SDan Williams int rc; 512f524bf27SDan Williams 513f524bf27SDan Williams nsindex = to_namespace_index(ndd, index); 514f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 515f524bf27SDan Williams nslot = nvdimm_num_label_slots(ndd); 516f524bf27SDan Williams else 517f524bf27SDan Williams nslot = __le32_to_cpu(nsindex->nslot); 518f524bf27SDan Williams 519f524bf27SDan Williams memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); 520564e871aSDan Williams memset(&nsindex->flags, 0, 3); 521564e871aSDan Williams nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; 522f524bf27SDan Williams nsindex->seq = __cpu_to_le32(seq); 523f524bf27SDan Williams offset = (unsigned long) nsindex 524f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 525f524bf27SDan Williams nsindex->myoff = __cpu_to_le64(offset); 526f524bf27SDan Williams nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); 527f524bf27SDan Williams offset = (unsigned long) to_namespace_index(ndd, 528f524bf27SDan Williams nd_label_next_nsindex(index)) 529f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 530f524bf27SDan Williams nsindex->otheroff = __cpu_to_le64(offset); 531f524bf27SDan Williams offset = (unsigned long) nd_label_base(ndd) 532f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 533f524bf27SDan Williams nsindex->labeloff = __cpu_to_le64(offset); 534f524bf27SDan Williams nsindex->nslot = __cpu_to_le32(nslot); 535f524bf27SDan Williams nsindex->major = __cpu_to_le16(1); 536*8990cdf1SDan Williams if (sizeof_namespace_label(ndd) < 256) 537f524bf27SDan Williams nsindex->minor = __cpu_to_le16(1); 538*8990cdf1SDan Williams else 539*8990cdf1SDan Williams nsindex->minor = __cpu_to_le16(2); 540f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(0); 541f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) { 542f524bf27SDan Williams unsigned long *free = (unsigned long *) nsindex->free; 543f524bf27SDan Williams u32 nfree = ALIGN(nslot, BITS_PER_LONG); 544f524bf27SDan Williams int last_bits, i; 545f524bf27SDan Williams 546f524bf27SDan Williams memset(nsindex->free, 0xff, nfree / 8); 547f524bf27SDan Williams for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) 548f524bf27SDan Williams clear_bit_le(nslot + i, free); 549f524bf27SDan Williams } 550f524bf27SDan Williams checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); 551f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(checksum); 552f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), 553f524bf27SDan Williams nsindex, sizeof_namespace_index(ndd)); 554f524bf27SDan Williams if (rc < 0) 555f524bf27SDan Williams return rc; 556f524bf27SDan Williams 557f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 558f524bf27SDan Williams return 0; 559f524bf27SDan Williams 560f524bf27SDan Williams /* copy the index we just wrote to the new 'next' */ 561f524bf27SDan Williams WARN_ON(index != ndd->ns_next); 562f524bf27SDan Williams nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); 563f524bf27SDan Williams ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); 564f524bf27SDan Williams ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); 565f524bf27SDan Williams WARN_ON(ndd->ns_current == ndd->ns_next); 566f524bf27SDan Williams 567f524bf27SDan Williams return 0; 568f524bf27SDan Williams } 569f524bf27SDan Williams 570f524bf27SDan Williams static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, 571f524bf27SDan Williams struct nd_namespace_label *nd_label) 572f524bf27SDan Williams { 573f524bf27SDan Williams return (unsigned long) nd_label 574f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 575f524bf27SDan Williams } 576f524bf27SDan Williams 577b3fde74eSDan Williams enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) 578b3fde74eSDan Williams { 579b3fde74eSDan Williams if (guid_equal(guid, &nvdimm_btt_guid)) 580b3fde74eSDan Williams return NVDIMM_CCLASS_BTT; 581b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_pfn_guid)) 582b3fde74eSDan Williams return NVDIMM_CCLASS_PFN; 583b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_dax_guid)) 584b3fde74eSDan Williams return NVDIMM_CCLASS_DAX; 585b3fde74eSDan Williams else if (guid_equal(guid, &guid_null)) 586b3fde74eSDan Williams return NVDIMM_CCLASS_NONE; 587b3fde74eSDan Williams 588b3fde74eSDan Williams return NVDIMM_CCLASS_UNKNOWN; 589b3fde74eSDan Williams } 590b3fde74eSDan Williams 591b3fde74eSDan Williams static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, 592b3fde74eSDan Williams guid_t *target) 593b3fde74eSDan Williams { 594b3fde74eSDan Williams if (claim_class == NVDIMM_CCLASS_BTT) 595b3fde74eSDan Williams return &nvdimm_btt_guid; 596b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_PFN) 597b3fde74eSDan Williams return &nvdimm_pfn_guid; 598b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_DAX) 599b3fde74eSDan Williams return &nvdimm_dax_guid; 600b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { 601b3fde74eSDan Williams /* 602b3fde74eSDan Williams * If we're modifying a namespace for which we don't 603b3fde74eSDan Williams * know the claim_class, don't touch the existing guid. 604b3fde74eSDan Williams */ 605b3fde74eSDan Williams return target; 606b3fde74eSDan Williams } else 607b3fde74eSDan Williams return &guid_null; 608b3fde74eSDan Williams } 609b3fde74eSDan Williams 610f524bf27SDan Williams static int __pmem_label_update(struct nd_region *nd_region, 611f524bf27SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, 612f524bf27SDan Williams int pos) 613f524bf27SDan Williams { 614b3fde74eSDan Williams struct nd_namespace_common *ndns = &nspm->nsio.common; 615faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 616f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 61716660eaeSDan Williams struct nd_label_ent *label_ent, *victim = NULL; 618f524bf27SDan Williams struct nd_namespace_label *nd_label; 619f524bf27SDan Williams struct nd_namespace_index *nsindex; 62016660eaeSDan Williams struct nd_label_id label_id; 62116660eaeSDan Williams struct resource *res; 622f524bf27SDan Williams unsigned long *free; 623f524bf27SDan Williams u32 nslot, slot; 624f524bf27SDan Williams size_t offset; 625c12c48ceSDan Williams u64 cookie; 626f524bf27SDan Williams int rc; 627f524bf27SDan Williams 628f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 629f524bf27SDan Williams return -ENXIO; 630f524bf27SDan Williams 631c12c48ceSDan Williams cookie = nd_region_interleave_set_cookie(nd_region, nsindex); 63216660eaeSDan Williams nd_label_gen_id(&label_id, nspm->uuid, 0); 63316660eaeSDan Williams for_each_dpa_resource(ndd, res) 63416660eaeSDan Williams if (strcmp(res->name, label_id.id) == 0) 63516660eaeSDan Williams break; 63616660eaeSDan Williams 63716660eaeSDan Williams if (!res) { 63816660eaeSDan Williams WARN_ON_ONCE(1); 63916660eaeSDan Williams return -ENXIO; 64016660eaeSDan Williams } 64116660eaeSDan Williams 642f524bf27SDan Williams /* allocate and write the label to the staging (next) index */ 643f524bf27SDan Williams slot = nd_label_alloc_slot(ndd); 644f524bf27SDan Williams if (slot == UINT_MAX) 645f524bf27SDan Williams return -ENXIO; 646f524bf27SDan Williams dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot); 647f524bf27SDan Williams 648564e871aSDan Williams nd_label = to_label(ndd, slot); 649564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 650f524bf27SDan Williams memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); 651f524bf27SDan Williams if (nspm->alt_name) 652f524bf27SDan Williams memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); 653f524bf27SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING); 654f524bf27SDan Williams nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); 655f524bf27SDan Williams nd_label->position = __cpu_to_le16(pos); 656f524bf27SDan Williams nd_label->isetcookie = __cpu_to_le64(cookie); 65716660eaeSDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 65816660eaeSDan Williams nd_label->dpa = __cpu_to_le64(res->start); 659f524bf27SDan Williams nd_label->slot = __cpu_to_le32(slot); 660faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 661faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 662b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 663b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 664b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 665b3fde74eSDan Williams &nd_label->abstraction_guid)); 666355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 667355d8388SDan Williams u64 sum; 668355d8388SDan Williams 669355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 670355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 671355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 672355d8388SDan Williams } 67316660eaeSDan Williams nd_dbg_dpa(nd_region, ndd, res, "%s\n", __func__); 674f524bf27SDan Williams 675f524bf27SDan Williams /* update label */ 676f524bf27SDan Williams offset = nd_label_offset(ndd, nd_label); 677f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 678564e871aSDan Williams sizeof_namespace_label(ndd)); 679f524bf27SDan Williams if (rc < 0) 680f524bf27SDan Williams return rc; 681f524bf27SDan Williams 682f524bf27SDan Williams /* Garbage collect the previous label */ 683ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 68416660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) { 68516660eaeSDan Williams if (!label_ent->label) 68616660eaeSDan Williams continue; 68716660eaeSDan Williams if (memcmp(nspm->uuid, label_ent->label->uuid, 68816660eaeSDan Williams NSLABEL_UUID_LEN) != 0) 68916660eaeSDan Williams continue; 69016660eaeSDan Williams victim = label_ent; 69116660eaeSDan Williams list_move_tail(&victim->list, &nd_mapping->labels); 69216660eaeSDan Williams break; 69316660eaeSDan Williams } 69416660eaeSDan Williams if (victim) { 695f524bf27SDan Williams dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); 69616660eaeSDan Williams slot = to_slot(ndd, victim->label); 69716660eaeSDan Williams nd_label_free_slot(ndd, slot); 69816660eaeSDan Williams victim->label = NULL; 699f524bf27SDan Williams } 700f524bf27SDan Williams 701f524bf27SDan Williams /* update index */ 702f524bf27SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 703f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 70416660eaeSDan Williams if (rc == 0) { 70516660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 70616660eaeSDan Williams if (!label_ent->label) { 707ae8219f1SDan Williams label_ent->label = nd_label; 70816660eaeSDan Williams nd_label = NULL; 70916660eaeSDan Williams break; 71016660eaeSDan Williams } 71116660eaeSDan Williams dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, 71216660eaeSDan Williams "failed to track label: %d\n", 71316660eaeSDan Williams to_slot(ndd, nd_label)); 71416660eaeSDan Williams if (nd_label) 71516660eaeSDan Williams rc = -ENXIO; 71616660eaeSDan Williams } 717ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 718ae8219f1SDan Williams 719f524bf27SDan Williams return rc; 7200ba1c634SDan Williams } 7210ba1c634SDan Williams 7220ba1c634SDan Williams static bool is_old_resource(struct resource *res, struct resource **list, int n) 723f524bf27SDan Williams { 724f524bf27SDan Williams int i; 7250ba1c634SDan Williams 7260ba1c634SDan Williams if (res->flags & DPA_RESOURCE_ADJUSTED) 7270ba1c634SDan Williams return false; 7280ba1c634SDan Williams for (i = 0; i < n; i++) 7290ba1c634SDan Williams if (res == list[i]) 7300ba1c634SDan Williams return true; 7310ba1c634SDan Williams return false; 7320ba1c634SDan Williams } 7330ba1c634SDan Williams 7340ba1c634SDan Williams static struct resource *to_resource(struct nvdimm_drvdata *ndd, 7350ba1c634SDan Williams struct nd_namespace_label *nd_label) 7360ba1c634SDan Williams { 7370ba1c634SDan Williams struct resource *res; 7380ba1c634SDan Williams 7390ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7400ba1c634SDan Williams if (res->start != __le64_to_cpu(nd_label->dpa)) 7410ba1c634SDan Williams continue; 7420ba1c634SDan Williams if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) 7430ba1c634SDan Williams continue; 7440ba1c634SDan Williams return res; 7450ba1c634SDan Williams } 7460ba1c634SDan Williams 7470ba1c634SDan Williams return NULL; 7480ba1c634SDan Williams } 7490ba1c634SDan Williams 7500ba1c634SDan Williams /* 7510ba1c634SDan Williams * 1/ Account all the labels that can be freed after this update 7520ba1c634SDan Williams * 2/ Allocate and write the label to the staging (next) index 7530ba1c634SDan Williams * 3/ Record the resources in the namespace device 7540ba1c634SDan Williams */ 7550ba1c634SDan Williams static int __blk_label_update(struct nd_region *nd_region, 7560ba1c634SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, 7570ba1c634SDan Williams int num_labels) 7580ba1c634SDan Williams { 759ae8219f1SDan Williams int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; 760faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 761b3fde74eSDan Williams struct nd_namespace_common *ndns = &nsblk->common; 762f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 7630ba1c634SDan Williams struct nd_namespace_label *nd_label; 764ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 7650ba1c634SDan Williams struct nd_namespace_index *nsindex; 7660ba1c634SDan Williams unsigned long *free, *victim_map = NULL; 7670ba1c634SDan Williams struct resource *res, **old_res_list; 7680ba1c634SDan Williams struct nd_label_id label_id; 7690ba1c634SDan Williams u8 uuid[NSLABEL_UUID_LEN]; 7703934d841SDan Williams int min_dpa_idx = 0; 771ae8219f1SDan Williams LIST_HEAD(list); 7720ba1c634SDan Williams u32 nslot, slot; 773f524bf27SDan Williams 7740ba1c634SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 7750ba1c634SDan Williams return -ENXIO; 776f524bf27SDan Williams 7770ba1c634SDan Williams old_res_list = nsblk->res; 7780ba1c634SDan Williams nfree = nd_label_nfree(ndd); 7790ba1c634SDan Williams old_num_resources = nsblk->num_resources; 7800ba1c634SDan Williams nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); 7810ba1c634SDan Williams 7820ba1c634SDan Williams /* 7830ba1c634SDan Williams * We need to loop over the old resources a few times, which seems a 7840ba1c634SDan Williams * bit inefficient, but we need to know that we have the label 7850ba1c634SDan Williams * space before we start mutating the tracking structures. 7860ba1c634SDan Williams * Otherwise the recovery method of last resort for userspace is 7870ba1c634SDan Williams * disable and re-enable the parent region. 7880ba1c634SDan Williams */ 7890ba1c634SDan Williams alloc = 0; 7900ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7910ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 7920ba1c634SDan Williams continue; 7930ba1c634SDan Williams if (!is_old_resource(res, old_res_list, old_num_resources)) 7940ba1c634SDan Williams alloc++; 7950ba1c634SDan Williams } 7960ba1c634SDan Williams 7970ba1c634SDan Williams victims = 0; 7980ba1c634SDan Williams if (old_num_resources) { 7990ba1c634SDan Williams /* convert old local-label-map to dimm-slot victim-map */ 8000ba1c634SDan Williams victim_map = kcalloc(BITS_TO_LONGS(nslot), sizeof(long), 8010ba1c634SDan Williams GFP_KERNEL); 8020ba1c634SDan Williams if (!victim_map) 8030ba1c634SDan Williams return -ENOMEM; 8040ba1c634SDan Williams 8050ba1c634SDan Williams /* mark unused labels for garbage collection */ 8060ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 807564e871aSDan Williams nd_label = to_label(ndd, slot); 8080ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 8090ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 8100ba1c634SDan Williams continue; 8110ba1c634SDan Williams res = to_resource(ndd, nd_label); 8120ba1c634SDan Williams if (res && is_old_resource(res, old_res_list, 8130ba1c634SDan Williams old_num_resources)) 8140ba1c634SDan Williams continue; 8150ba1c634SDan Williams slot = to_slot(ndd, nd_label); 8160ba1c634SDan Williams set_bit(slot, victim_map); 8170ba1c634SDan Williams victims++; 8180ba1c634SDan Williams } 8190ba1c634SDan Williams } 8200ba1c634SDan Williams 8210ba1c634SDan Williams /* don't allow updates that consume the last label */ 8220ba1c634SDan Williams if (nfree - alloc < 0 || nfree - alloc + victims < 1) { 8238c2f7e86SDan Williams dev_info(&nsblk->common.dev, "insufficient label space\n"); 8240ba1c634SDan Williams kfree(victim_map); 8250ba1c634SDan Williams return -ENOSPC; 8260ba1c634SDan Williams } 8270ba1c634SDan Williams /* from here on we need to abort on error */ 8280ba1c634SDan Williams 8290ba1c634SDan Williams 8300ba1c634SDan Williams /* assign all resources to the namespace before writing the labels */ 8310ba1c634SDan Williams nsblk->res = NULL; 8320ba1c634SDan Williams nsblk->num_resources = 0; 8330ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 8340ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 8350ba1c634SDan Williams continue; 8360ba1c634SDan Williams if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { 8370ba1c634SDan Williams rc = -ENOMEM; 8380ba1c634SDan Williams goto abort; 8390ba1c634SDan Williams } 8400ba1c634SDan Williams } 8410ba1c634SDan Williams 8423934d841SDan Williams /* 8433934d841SDan Williams * Find the resource associated with the first label in the set 8443934d841SDan Williams * per the v1.2 namespace specification. 8453934d841SDan Williams */ 8463934d841SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8473934d841SDan Williams struct resource *min = nsblk->res[min_dpa_idx]; 8483934d841SDan Williams 8493934d841SDan Williams res = nsblk->res[i]; 8503934d841SDan Williams if (res->start < min->start) 8513934d841SDan Williams min_dpa_idx = i; 8523934d841SDan Williams } 8533934d841SDan Williams 8540ba1c634SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8550ba1c634SDan Williams size_t offset; 8560ba1c634SDan Williams 8570ba1c634SDan Williams res = nsblk->res[i]; 8580ba1c634SDan Williams if (is_old_resource(res, old_res_list, old_num_resources)) 8590ba1c634SDan Williams continue; /* carry-over */ 8600ba1c634SDan Williams slot = nd_label_alloc_slot(ndd); 8610ba1c634SDan Williams if (slot == UINT_MAX) 8620ba1c634SDan Williams goto abort; 8630ba1c634SDan Williams dev_dbg(ndd->dev, "%s: allocated: %d\n", __func__, slot); 8640ba1c634SDan Williams 865564e871aSDan Williams nd_label = to_label(ndd, slot); 866564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 8670ba1c634SDan Williams memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); 8680ba1c634SDan Williams if (nsblk->alt_name) 8690ba1c634SDan Williams memcpy(nd_label->name, nsblk->alt_name, 8700ba1c634SDan Williams NSLABEL_NAME_LEN); 8710ba1c634SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); 8728f2bc243SDan Williams 8738f2bc243SDan Williams /* 8748f2bc243SDan Williams * Use the presence of the type_guid as a flag to 8753934d841SDan Williams * determine isetcookie usage and nlabel + position 8763934d841SDan Williams * policy for blk-aperture namespaces. 8778f2bc243SDan Williams */ 8783934d841SDan Williams if (namespace_label_has(ndd, type_guid)) { 8793934d841SDan Williams if (i == min_dpa_idx) { 8803934d841SDan Williams nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); 8813934d841SDan Williams nd_label->position = __cpu_to_le16(0); 8823934d841SDan Williams } else { 8833934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0xffff); 8843934d841SDan Williams nd_label->position = __cpu_to_le16(0xffff); 8853934d841SDan Williams } 8868f2bc243SDan Williams nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); 8873934d841SDan Williams } else { 8883934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0); /* N/A */ 8893934d841SDan Williams nd_label->position = __cpu_to_le16(0); /* N/A */ 8900ba1c634SDan Williams nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ 8913934d841SDan Williams } 8928f2bc243SDan Williams 8930ba1c634SDan Williams nd_label->dpa = __cpu_to_le64(res->start); 8940ba1c634SDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 8950ba1c634SDan Williams nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); 8960ba1c634SDan Williams nd_label->slot = __cpu_to_le32(slot); 897faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 898faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 899b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 900b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 901b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 902b3fde74eSDan Williams &nd_label->abstraction_guid)); 903b3fde74eSDan Williams 904355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 905355d8388SDan Williams u64 sum; 906355d8388SDan Williams 907355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 908355d8388SDan Williams sum = nd_fletcher64(nd_label, 909355d8388SDan Williams sizeof_namespace_label(ndd), 1); 910355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 911355d8388SDan Williams } 9120ba1c634SDan Williams 9130ba1c634SDan Williams /* update label */ 9140ba1c634SDan Williams offset = nd_label_offset(ndd, nd_label); 9150ba1c634SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 916564e871aSDan Williams sizeof_namespace_label(ndd)); 9170ba1c634SDan Williams if (rc < 0) 9180ba1c634SDan Williams goto abort; 9190ba1c634SDan Williams } 9200ba1c634SDan Williams 9210ba1c634SDan Williams /* free up now unused slots in the new index */ 9220ba1c634SDan Williams for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { 9230ba1c634SDan Williams dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); 9240ba1c634SDan Williams nd_label_free_slot(ndd, slot); 9250ba1c634SDan Williams } 9260ba1c634SDan Williams 9270ba1c634SDan Williams /* update index */ 9280ba1c634SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 9290ba1c634SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 9300ba1c634SDan Williams if (rc) 9310ba1c634SDan Williams goto abort; 9320ba1c634SDan Williams 9330ba1c634SDan Williams /* 9340ba1c634SDan Williams * Now that the on-dimm labels are up to date, fix up the tracking 9350ba1c634SDan Williams * entries in nd_mapping->labels 9360ba1c634SDan Williams */ 9370ba1c634SDan Williams nlabel = 0; 938ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 939ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 940ae8219f1SDan Williams nd_label = label_ent->label; 941ae8219f1SDan Williams if (!nd_label) 942ae8219f1SDan Williams continue; 9430ba1c634SDan Williams nlabel++; 9440ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9450ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9460ba1c634SDan Williams continue; 9470ba1c634SDan Williams nlabel--; 948ae8219f1SDan Williams list_move(&label_ent->list, &list); 949ae8219f1SDan Williams label_ent->label = NULL; 9500ba1c634SDan Williams } 951ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 952ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 953ae8219f1SDan Williams 9540ba1c634SDan Williams if (nlabel + nsblk->num_resources > num_labels) { 9550ba1c634SDan Williams /* 9560ba1c634SDan Williams * Bug, we can't end up with more resources than 9570ba1c634SDan Williams * available labels 9580ba1c634SDan Williams */ 9590ba1c634SDan Williams WARN_ON_ONCE(1); 9600ba1c634SDan Williams rc = -ENXIO; 9610ba1c634SDan Williams goto out; 9620ba1c634SDan Williams } 9630ba1c634SDan Williams 964ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 965ae8219f1SDan Williams label_ent = list_first_entry_or_null(&nd_mapping->labels, 966ae8219f1SDan Williams typeof(*label_ent), list); 967ae8219f1SDan Williams if (!label_ent) { 968ae8219f1SDan Williams WARN_ON(1); 969ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 970ae8219f1SDan Williams rc = -ENXIO; 971ae8219f1SDan Williams goto out; 972ae8219f1SDan Williams } 9730ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 974564e871aSDan Williams nd_label = to_label(ndd, slot); 9750ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9760ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9770ba1c634SDan Williams continue; 9780ba1c634SDan Williams res = to_resource(ndd, nd_label); 9790ba1c634SDan Williams res->flags &= ~DPA_RESOURCE_ADJUSTED; 980ae8219f1SDan Williams dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); 981ae8219f1SDan Williams list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { 982ae8219f1SDan Williams if (label_ent->label) 983ae8219f1SDan Williams continue; 984ae8219f1SDan Williams label_ent->label = nd_label; 985ae8219f1SDan Williams nd_label = NULL; 986ae8219f1SDan Williams break; 9870ba1c634SDan Williams } 988ae8219f1SDan Williams if (nd_label) 989ae8219f1SDan Williams dev_WARN(&nsblk->common.dev, 990ae8219f1SDan Williams "failed to track label slot%d\n", slot); 991ae8219f1SDan Williams } 992ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 9930ba1c634SDan Williams 9940ba1c634SDan Williams out: 9950ba1c634SDan Williams kfree(old_res_list); 9960ba1c634SDan Williams kfree(victim_map); 9970ba1c634SDan Williams return rc; 9980ba1c634SDan Williams 9990ba1c634SDan Williams abort: 10000ba1c634SDan Williams /* 10010ba1c634SDan Williams * 1/ repair the allocated label bitmap in the index 10020ba1c634SDan Williams * 2/ restore the resource list 10030ba1c634SDan Williams */ 10040ba1c634SDan Williams nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); 10050ba1c634SDan Williams kfree(nsblk->res); 10060ba1c634SDan Williams nsblk->res = old_res_list; 10070ba1c634SDan Williams nsblk->num_resources = old_num_resources; 10080ba1c634SDan Williams old_res_list = NULL; 10090ba1c634SDan Williams goto out; 10100ba1c634SDan Williams } 10110ba1c634SDan Williams 10120ba1c634SDan Williams static int init_labels(struct nd_mapping *nd_mapping, int num_labels) 10130ba1c634SDan Williams { 1014ae8219f1SDan Williams int i, old_num_labels = 0; 1015ae8219f1SDan Williams struct nd_label_ent *label_ent; 10160ba1c634SDan Williams struct nd_namespace_index *nsindex; 10170ba1c634SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 10180ba1c634SDan Williams 1019ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1020ae8219f1SDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 10210ba1c634SDan Williams old_num_labels++; 1022ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10230ba1c634SDan Williams 10240ba1c634SDan Williams /* 10250ba1c634SDan Williams * We need to preserve all the old labels for the mapping so 10260ba1c634SDan Williams * they can be garbage collected after writing the new labels. 10270ba1c634SDan Williams */ 1028ae8219f1SDan Williams for (i = old_num_labels; i < num_labels; i++) { 1029ae8219f1SDan Williams label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); 1030ae8219f1SDan Williams if (!label_ent) 10310ba1c634SDan Williams return -ENOMEM; 1032ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1033ae8219f1SDan Williams list_add_tail(&label_ent->list, &nd_mapping->labels); 1034ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10350ba1c634SDan Williams } 10360ba1c634SDan Williams 1037f524bf27SDan Williams if (ndd->ns_current == -1 || ndd->ns_next == -1) 1038f524bf27SDan Williams /* pass */; 1039f524bf27SDan Williams else 10400ba1c634SDan Williams return max(num_labels, old_num_labels); 1041f524bf27SDan Williams 1042f524bf27SDan Williams nsindex = to_namespace_index(ndd, 0); 1043f524bf27SDan Williams memset(nsindex, 0, ndd->nsarea.config_size); 1044f524bf27SDan Williams for (i = 0; i < 2; i++) { 1045f524bf27SDan Williams int rc = nd_label_write_index(ndd, i, i*2, ND_NSINDEX_INIT); 1046f524bf27SDan Williams 1047f524bf27SDan Williams if (rc) 1048f524bf27SDan Williams return rc; 1049f524bf27SDan Williams } 1050f524bf27SDan Williams ndd->ns_next = 1; 1051f524bf27SDan Williams ndd->ns_current = 0; 1052f524bf27SDan Williams 10530ba1c634SDan Williams return max(num_labels, old_num_labels); 1054f524bf27SDan Williams } 1055f524bf27SDan Williams 1056f524bf27SDan Williams static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) 1057f524bf27SDan Williams { 1058f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 1059ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 1060f524bf27SDan Williams struct nd_namespace_index *nsindex; 1061f524bf27SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 1062f524bf27SDan Williams unsigned long *free; 1063ae8219f1SDan Williams LIST_HEAD(list); 1064f524bf27SDan Williams u32 nslot, slot; 1065ae8219f1SDan Williams int active = 0; 1066f524bf27SDan Williams 1067f524bf27SDan Williams if (!uuid) 1068f524bf27SDan Williams return 0; 1069f524bf27SDan Williams 1070f524bf27SDan Williams /* no index || no labels == nothing to delete */ 1071ae8219f1SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 1072f524bf27SDan Williams return 0; 1073f524bf27SDan Williams 1074ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1075ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 1076ae8219f1SDan Williams struct nd_namespace_label *nd_label = label_ent->label; 1077ae8219f1SDan Williams 1078ae8219f1SDan Williams if (!nd_label) 1079ae8219f1SDan Williams continue; 1080ae8219f1SDan Williams active++; 1081f524bf27SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 1082f524bf27SDan Williams if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) 1083f524bf27SDan Williams continue; 1084ae8219f1SDan Williams active--; 1085f524bf27SDan Williams slot = to_slot(ndd, nd_label); 1086f524bf27SDan Williams nd_label_free_slot(ndd, slot); 1087f524bf27SDan Williams dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); 1088ae8219f1SDan Williams list_move_tail(&label_ent->list, &list); 1089ae8219f1SDan Williams label_ent->label = NULL; 1090f524bf27SDan Williams } 1091ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 1092f524bf27SDan Williams 1093ae8219f1SDan Williams if (active == 0) { 1094ae8219f1SDan Williams nd_mapping_free_labels(nd_mapping); 1095ae8219f1SDan Williams dev_dbg(ndd->dev, "%s: no more active labels\n", __func__); 1096f524bf27SDan Williams } 1097ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1098f524bf27SDan Williams 1099f524bf27SDan Williams return nd_label_write_index(ndd, ndd->ns_next, 1100f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 1101f524bf27SDan Williams } 1102f524bf27SDan Williams 1103f524bf27SDan Williams int nd_pmem_namespace_label_update(struct nd_region *nd_region, 1104f524bf27SDan Williams struct nd_namespace_pmem *nspm, resource_size_t size) 1105f524bf27SDan Williams { 1106f524bf27SDan Williams int i; 1107f524bf27SDan Williams 1108f524bf27SDan Williams for (i = 0; i < nd_region->ndr_mappings; i++) { 1109f524bf27SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 111016660eaeSDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 111116660eaeSDan Williams struct resource *res; 111216660eaeSDan Williams int rc, count = 0; 1113f524bf27SDan Williams 1114f524bf27SDan Williams if (size == 0) { 1115f524bf27SDan Williams rc = del_labels(nd_mapping, nspm->uuid); 1116f524bf27SDan Williams if (rc) 1117f524bf27SDan Williams return rc; 1118f524bf27SDan Williams continue; 1119f524bf27SDan Williams } 1120f524bf27SDan Williams 112116660eaeSDan Williams for_each_dpa_resource(ndd, res) 11222d9a0274SNicolas Iooss if (strncmp(res->name, "pmem", 4) == 0) 112316660eaeSDan Williams count++; 112416660eaeSDan Williams WARN_ON_ONCE(!count); 112516660eaeSDan Williams 112616660eaeSDan Williams rc = init_labels(nd_mapping, count); 11270ba1c634SDan Williams if (rc < 0) 1128f524bf27SDan Williams return rc; 1129f524bf27SDan Williams 1130f524bf27SDan Williams rc = __pmem_label_update(nd_region, nd_mapping, nspm, i); 1131f524bf27SDan Williams if (rc) 1132f524bf27SDan Williams return rc; 1133f524bf27SDan Williams } 1134f524bf27SDan Williams 1135f524bf27SDan Williams return 0; 1136f524bf27SDan Williams } 11370ba1c634SDan Williams 11380ba1c634SDan Williams int nd_blk_namespace_label_update(struct nd_region *nd_region, 11390ba1c634SDan Williams struct nd_namespace_blk *nsblk, resource_size_t size) 11400ba1c634SDan Williams { 11410ba1c634SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[0]; 11420ba1c634SDan Williams struct resource *res; 11430ba1c634SDan Williams int count = 0; 11440ba1c634SDan Williams 11450ba1c634SDan Williams if (size == 0) 11460ba1c634SDan Williams return del_labels(nd_mapping, nsblk->uuid); 11470ba1c634SDan Williams 11480ba1c634SDan Williams for_each_dpa_resource(to_ndd(nd_mapping), res) 11490ba1c634SDan Williams count++; 11500ba1c634SDan Williams 11510ba1c634SDan Williams count = init_labels(nd_mapping, count); 11520ba1c634SDan Williams if (count < 0) 11530ba1c634SDan Williams return count; 11540ba1c634SDan Williams 11550ba1c634SDan Williams return __blk_label_update(nd_region, nd_mapping, nsblk, count); 11560ba1c634SDan Williams } 1157b3fde74eSDan Williams 1158b3fde74eSDan Williams int __init nd_label_init(void) 1159b3fde74eSDan Williams { 1160b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); 1161b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); 1162b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); 1163b3fde74eSDan Williams 1164b3fde74eSDan Williams return 0; 1165b3fde74eSDan Williams } 1166