14a826c83SDan Williams /* 24a826c83SDan Williams * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. 34a826c83SDan Williams * 44a826c83SDan Williams * This program is free software; you can redistribute it and/or modify 54a826c83SDan Williams * it under the terms of version 2 of the GNU General Public License as 64a826c83SDan Williams * published by the Free Software Foundation. 74a826c83SDan Williams * 84a826c83SDan Williams * This program is distributed in the hope that it will be useful, but 94a826c83SDan Williams * WITHOUT ANY WARRANTY; without even the implied warranty of 104a826c83SDan Williams * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 114a826c83SDan Williams * General Public License for more details. 124a826c83SDan Williams */ 134a826c83SDan Williams #include <linux/device.h> 144a826c83SDan Williams #include <linux/ndctl.h> 15b3fde74eSDan Williams #include <linux/uuid.h> 16f524bf27SDan Williams #include <linux/slab.h> 174a826c83SDan Williams #include <linux/io.h> 184a826c83SDan Williams #include <linux/nd.h> 194a826c83SDan Williams #include "nd-core.h" 204a826c83SDan Williams #include "label.h" 214a826c83SDan Williams #include "nd.h" 224a826c83SDan Williams 23b3fde74eSDan Williams static guid_t nvdimm_btt_guid; 2414e49454SVishal Verma static guid_t nvdimm_btt2_guid; 25b3fde74eSDan Williams static guid_t nvdimm_pfn_guid; 26b3fde74eSDan Williams static guid_t nvdimm_dax_guid; 27b3fde74eSDan Williams 284a826c83SDan Williams static u32 best_seq(u32 a, u32 b) 294a826c83SDan Williams { 304a826c83SDan Williams a &= NSINDEX_SEQ_MASK; 314a826c83SDan Williams b &= NSINDEX_SEQ_MASK; 324a826c83SDan Williams 334a826c83SDan Williams if (a == 0 || a == b) 344a826c83SDan Williams return b; 354a826c83SDan Williams else if (b == 0) 364a826c83SDan Williams return a; 374a826c83SDan Williams else if (nd_inc_seq(a) == b) 384a826c83SDan Williams return b; 394a826c83SDan Williams else 404a826c83SDan Williams return a; 414a826c83SDan Williams } 424a826c83SDan Williams 43564e871aSDan Williams unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) 44564e871aSDan Williams { 45564e871aSDan Williams return ndd->nslabel_size; 46564e871aSDan Williams } 47564e871aSDan Williams 4802881768SDan Williams int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) 4902881768SDan Williams { 5002881768SDan Williams return ndd->nsarea.config_size / (sizeof_namespace_label(ndd) + 1); 5102881768SDan Williams } 5202881768SDan Williams 534a826c83SDan Williams size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) 544a826c83SDan Williams { 5502881768SDan Williams u32 nslot, space, size; 564a826c83SDan Williams 574a826c83SDan Williams /* 584a826c83SDan Williams * The minimum index space is 512 bytes, with that amount of 594a826c83SDan Williams * index we can describe ~1400 labels which is less than a byte 604a826c83SDan Williams * of overhead per label. Round up to a byte of overhead per 614a826c83SDan Williams * label and determine the size of the index region. Yes, this 624a826c83SDan Williams * starts to waste space at larger config_sizes, but it's 634a826c83SDan Williams * unlikely we'll ever see anything but 128K. 644a826c83SDan Williams */ 6502881768SDan Williams nslot = nvdimm_num_label_slots(ndd); 6602881768SDan Williams space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); 6702881768SDan Williams size = ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), 6802881768SDan Williams NSINDEX_ALIGN) * 2; 6902881768SDan Williams if (size <= space) 7002881768SDan Williams return size / 2; 714a826c83SDan Williams 7202881768SDan Williams dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n", 7302881768SDan Williams ndd->nsarea.config_size, sizeof_namespace_label(ndd)); 7402881768SDan Williams return 0; 75f524bf27SDan Williams } 76f524bf27SDan Williams 77564e871aSDan Williams static int __nd_label_validate(struct nvdimm_drvdata *ndd) 784a826c83SDan Williams { 794a826c83SDan Williams /* 804a826c83SDan Williams * On media label format consists of two index blocks followed 814a826c83SDan Williams * by an array of labels. None of these structures are ever 824a826c83SDan Williams * updated in place. A sequence number tracks the current 834a826c83SDan Williams * active index and the next one to write, while labels are 844a826c83SDan Williams * written to free slots. 854a826c83SDan Williams * 864a826c83SDan Williams * +------------+ 874a826c83SDan Williams * | | 884a826c83SDan Williams * | nsindex0 | 894a826c83SDan Williams * | | 904a826c83SDan Williams * +------------+ 914a826c83SDan Williams * | | 924a826c83SDan Williams * | nsindex1 | 934a826c83SDan Williams * | | 944a826c83SDan Williams * +------------+ 954a826c83SDan Williams * | label0 | 964a826c83SDan Williams * +------------+ 974a826c83SDan Williams * | label1 | 984a826c83SDan Williams * +------------+ 994a826c83SDan Williams * | | 1004a826c83SDan Williams * ....nslot... 1014a826c83SDan Williams * | | 1024a826c83SDan Williams * +------------+ 1034a826c83SDan Williams * | labelN | 1044a826c83SDan Williams * +------------+ 1054a826c83SDan Williams */ 1064a826c83SDan Williams struct nd_namespace_index *nsindex[] = { 1074a826c83SDan Williams to_namespace_index(ndd, 0), 1084a826c83SDan Williams to_namespace_index(ndd, 1), 1094a826c83SDan Williams }; 1104a826c83SDan Williams const int num_index = ARRAY_SIZE(nsindex); 1114a826c83SDan Williams struct device *dev = ndd->dev; 1124a826c83SDan Williams bool valid[2] = { 0 }; 1134a826c83SDan Williams int i, num_valid = 0; 1144a826c83SDan Williams u32 seq; 1154a826c83SDan Williams 1164a826c83SDan Williams for (i = 0; i < num_index; i++) { 1174a826c83SDan Williams u32 nslot; 1184a826c83SDan Williams u8 sig[NSINDEX_SIG_LEN]; 1194a826c83SDan Williams u64 sum_save, sum, size; 120564e871aSDan Williams unsigned int version, labelsize; 1214a826c83SDan Williams 1224a826c83SDan Williams memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); 1234a826c83SDan Williams if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) { 124*426824d6SDan Williams dev_dbg(dev, "nsindex%d signature invalid\n", i); 1254a826c83SDan Williams continue; 1264a826c83SDan Williams } 127564e871aSDan Williams 128564e871aSDan Williams /* label sizes larger than 128 arrived with v1.2 */ 129564e871aSDan Williams version = __le16_to_cpu(nsindex[i]->major) * 100 130564e871aSDan Williams + __le16_to_cpu(nsindex[i]->minor); 131564e871aSDan Williams if (version >= 102) 132564e871aSDan Williams labelsize = 1 << (7 + nsindex[i]->labelsize); 133564e871aSDan Williams else 134564e871aSDan Williams labelsize = 128; 135564e871aSDan Williams 136564e871aSDan Williams if (labelsize != sizeof_namespace_label(ndd)) { 137*426824d6SDan Williams dev_dbg(dev, "nsindex%d labelsize %d invalid\n", 138*426824d6SDan Williams i, nsindex[i]->labelsize); 139564e871aSDan Williams continue; 140564e871aSDan Williams } 141564e871aSDan Williams 1424a826c83SDan Williams sum_save = __le64_to_cpu(nsindex[i]->checksum); 1434a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(0); 1444a826c83SDan Williams sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1); 1454a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(sum_save); 1464a826c83SDan Williams if (sum != sum_save) { 147*426824d6SDan Williams dev_dbg(dev, "nsindex%d checksum invalid\n", i); 1484a826c83SDan Williams continue; 1494a826c83SDan Williams } 1504a826c83SDan Williams 1514a826c83SDan Williams seq = __le32_to_cpu(nsindex[i]->seq); 1524a826c83SDan Williams if ((seq & NSINDEX_SEQ_MASK) == 0) { 153*426824d6SDan Williams dev_dbg(dev, "nsindex%d sequence: %#x invalid\n", 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)) { 160*426824d6SDan Williams dev_dbg(dev, "nsindex%d myoff: %#llx invalid\n", 161*426824d6SDan Williams 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)) { 167*426824d6SDan Williams dev_dbg(dev, "nsindex%d otheroff: %#llx invalid\n", 168*426824d6SDan Williams 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)) { 176*426824d6SDan Williams dev_dbg(dev, "nsindex%d mysize: %#llx invalid\n", i, size); 1774a826c83SDan Williams continue; 1784a826c83SDan Williams } 1794a826c83SDan Williams 1804a826c83SDan Williams nslot = __le32_to_cpu(nsindex[i]->nslot); 181564e871aSDan Williams if (nslot * sizeof_namespace_label(ndd) 1824a826c83SDan Williams + 2 * sizeof_namespace_index(ndd) 1834a826c83SDan Williams > ndd->nsarea.config_size) { 184*426824d6SDan Williams dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n", 185*426824d6SDan Williams i, nslot, ndd->nsarea.config_size); 1864a826c83SDan Williams continue; 1874a826c83SDan Williams } 1884a826c83SDan Williams valid[i] = true; 1894a826c83SDan Williams num_valid++; 1904a826c83SDan Williams } 1914a826c83SDan Williams 1924a826c83SDan Williams switch (num_valid) { 1934a826c83SDan Williams case 0: 1944a826c83SDan Williams break; 1954a826c83SDan Williams case 1: 1964a826c83SDan Williams for (i = 0; i < num_index; i++) 1974a826c83SDan Williams if (valid[i]) 1984a826c83SDan Williams return i; 1994a826c83SDan Williams /* can't have num_valid > 0 but valid[] = { false, false } */ 2004a826c83SDan Williams WARN_ON(1); 2014a826c83SDan Williams break; 2024a826c83SDan Williams default: 2034a826c83SDan Williams /* pick the best index... */ 2044a826c83SDan Williams seq = best_seq(__le32_to_cpu(nsindex[0]->seq), 2054a826c83SDan Williams __le32_to_cpu(nsindex[1]->seq)); 2064a826c83SDan Williams if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) 2074a826c83SDan Williams return 1; 2084a826c83SDan Williams else 2094a826c83SDan Williams return 0; 2104a826c83SDan Williams break; 2114a826c83SDan Williams } 2124a826c83SDan Williams 2134a826c83SDan Williams return -1; 2144a826c83SDan Williams } 2154a826c83SDan Williams 216564e871aSDan Williams int nd_label_validate(struct nvdimm_drvdata *ndd) 217564e871aSDan Williams { 218564e871aSDan Williams /* 219564e871aSDan Williams * In order to probe for and validate namespace index blocks we 220564e871aSDan Williams * need to know the size of the labels, and we can't trust the 221564e871aSDan Williams * size of the labels until we validate the index blocks. 222564e871aSDan Williams * Resolve this dependency loop by probing for known label 2238990cdf1SDan Williams * sizes, but default to v1.2 256-byte namespace labels if 2248990cdf1SDan Williams * discovery fails. 225564e871aSDan Williams */ 2268990cdf1SDan Williams int label_size[] = { 128, 256 }; 227564e871aSDan Williams int i, rc; 228564e871aSDan Williams 229564e871aSDan Williams for (i = 0; i < ARRAY_SIZE(label_size); i++) { 230564e871aSDan Williams ndd->nslabel_size = label_size[i]; 231564e871aSDan Williams rc = __nd_label_validate(ndd); 232564e871aSDan Williams if (rc >= 0) 233564e871aSDan Williams return rc; 234564e871aSDan Williams } 235564e871aSDan Williams 236564e871aSDan Williams return -1; 237564e871aSDan Williams } 238564e871aSDan Williams 2394a826c83SDan Williams void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst, 2404a826c83SDan Williams struct nd_namespace_index *src) 2414a826c83SDan Williams { 2424a826c83SDan Williams if (dst && src) 2434a826c83SDan Williams /* pass */; 2444a826c83SDan Williams else 2454a826c83SDan Williams return; 2464a826c83SDan Williams 2474a826c83SDan Williams memcpy(dst, src, sizeof_namespace_index(ndd)); 2484a826c83SDan Williams } 2494a826c83SDan Williams 2504a826c83SDan Williams static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) 2514a826c83SDan Williams { 2524a826c83SDan Williams void *base = to_namespace_index(ndd, 0); 2534a826c83SDan Williams 2544a826c83SDan Williams return base + 2 * sizeof_namespace_index(ndd); 2554a826c83SDan Williams } 2564a826c83SDan Williams 257f524bf27SDan Williams static int to_slot(struct nvdimm_drvdata *ndd, 258f524bf27SDan Williams struct nd_namespace_label *nd_label) 259f524bf27SDan Williams { 260564e871aSDan Williams unsigned long label, base; 261564e871aSDan Williams 262564e871aSDan Williams label = (unsigned long) nd_label; 263564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 264564e871aSDan Williams 265564e871aSDan Williams return (label - base) / sizeof_namespace_label(ndd); 266564e871aSDan Williams } 267564e871aSDan Williams 268564e871aSDan Williams static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) 269564e871aSDan Williams { 270564e871aSDan Williams unsigned long label, base; 271564e871aSDan Williams 272564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 273564e871aSDan Williams label = base + sizeof_namespace_label(ndd) * slot; 274564e871aSDan Williams 275564e871aSDan Williams return (struct nd_namespace_label *) label; 276f524bf27SDan Williams } 277f524bf27SDan Williams 2784a826c83SDan Williams #define for_each_clear_bit_le(bit, addr, size) \ 2794a826c83SDan Williams for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ 2804a826c83SDan Williams (bit) < (size); \ 2814a826c83SDan Williams (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) 2824a826c83SDan Williams 2834a826c83SDan Williams /** 284f524bf27SDan Williams * preamble_index - common variable initialization for nd_label_* routines 2854a826c83SDan Williams * @ndd: dimm container for the relevant label set 286f524bf27SDan Williams * @idx: namespace_index index 2874a826c83SDan Williams * @nsindex_out: on return set to the currently active namespace index 2884a826c83SDan Williams * @free: on return set to the free label bitmap in the index 2894a826c83SDan Williams * @nslot: on return set to the number of slots in the label space 2904a826c83SDan Williams */ 291f524bf27SDan Williams static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, 2924a826c83SDan Williams struct nd_namespace_index **nsindex_out, 2934a826c83SDan Williams unsigned long **free, u32 *nslot) 2944a826c83SDan Williams { 2954a826c83SDan Williams struct nd_namespace_index *nsindex; 2964a826c83SDan Williams 297f524bf27SDan Williams nsindex = to_namespace_index(ndd, idx); 2984a826c83SDan Williams if (nsindex == NULL) 2994a826c83SDan Williams return false; 3004a826c83SDan Williams 3014a826c83SDan Williams *free = (unsigned long *) nsindex->free; 3024a826c83SDan Williams *nslot = __le32_to_cpu(nsindex->nslot); 3034a826c83SDan Williams *nsindex_out = nsindex; 3044a826c83SDan Williams 3054a826c83SDan Williams return true; 3064a826c83SDan Williams } 3074a826c83SDan Williams 308bf9bccc1SDan Williams char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) 3094a826c83SDan Williams { 3104a826c83SDan Williams if (!label_id || !uuid) 3114a826c83SDan Williams return NULL; 3124a826c83SDan Williams snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", 3134a826c83SDan Williams flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); 3144a826c83SDan Williams return label_id->id; 3154a826c83SDan Williams } 3164a826c83SDan Williams 317f524bf27SDan Williams static bool preamble_current(struct nvdimm_drvdata *ndd, 318f524bf27SDan Williams struct nd_namespace_index **nsindex, 319f524bf27SDan Williams unsigned long **free, u32 *nslot) 320f524bf27SDan Williams { 321f524bf27SDan Williams return preamble_index(ndd, ndd->ns_current, nsindex, 322f524bf27SDan Williams free, nslot); 323f524bf27SDan Williams } 324f524bf27SDan Williams 325f524bf27SDan Williams static bool preamble_next(struct nvdimm_drvdata *ndd, 326f524bf27SDan Williams struct nd_namespace_index **nsindex, 327f524bf27SDan Williams unsigned long **free, u32 *nslot) 328f524bf27SDan Williams { 329f524bf27SDan Williams return preamble_index(ndd, ndd->ns_next, nsindex, 330f524bf27SDan Williams free, nslot); 331f524bf27SDan Williams } 332f524bf27SDan Williams 333355d8388SDan Williams static bool slot_valid(struct nvdimm_drvdata *ndd, 334355d8388SDan Williams struct nd_namespace_label *nd_label, u32 slot) 3354a826c83SDan Williams { 3364a826c83SDan Williams /* check that we are written where we expect to be written */ 3374a826c83SDan Williams if (slot != __le32_to_cpu(nd_label->slot)) 3384a826c83SDan Williams return false; 3394a826c83SDan Williams 3404a826c83SDan Williams /* check that DPA allocations are page aligned */ 3414a826c83SDan Williams if ((__le64_to_cpu(nd_label->dpa) 3424a826c83SDan Williams | __le64_to_cpu(nd_label->rawsize)) % SZ_4K) 3434a826c83SDan Williams return false; 3444a826c83SDan Williams 345355d8388SDan Williams /* check checksum */ 346355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 347355d8388SDan Williams u64 sum, sum_save; 348355d8388SDan Williams 349355d8388SDan Williams sum_save = __le64_to_cpu(nd_label->checksum); 350355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 351355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 352355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum_save); 353355d8388SDan Williams if (sum != sum_save) { 354*426824d6SDan Williams dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n", 355*426824d6SDan Williams slot, sum); 356355d8388SDan Williams return false; 357355d8388SDan Williams } 358355d8388SDan Williams } 359355d8388SDan Williams 3604a826c83SDan Williams return true; 3614a826c83SDan Williams } 3624a826c83SDan Williams 3634a826c83SDan Williams int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) 3644a826c83SDan Williams { 3654a826c83SDan Williams struct nd_namespace_index *nsindex; 3664a826c83SDan Williams unsigned long *free; 3674a826c83SDan Williams u32 nslot, slot; 3684a826c83SDan Williams 3694a826c83SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 3704a826c83SDan Williams return 0; /* no label, nothing to reserve */ 3714a826c83SDan Williams 3724a826c83SDan Williams for_each_clear_bit_le(slot, free, nslot) { 3734a826c83SDan Williams struct nd_namespace_label *nd_label; 3744a826c83SDan Williams struct nd_region *nd_region = NULL; 3754a826c83SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 3764a826c83SDan Williams struct nd_label_id label_id; 3774a826c83SDan Williams struct resource *res; 3784a826c83SDan Williams u32 flags; 3794a826c83SDan Williams 380564e871aSDan Williams nd_label = to_label(ndd, slot); 3814a826c83SDan Williams 382355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 3834a826c83SDan Williams continue; 3844a826c83SDan Williams 3854a826c83SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 3864a826c83SDan Williams flags = __le32_to_cpu(nd_label->flags); 3874a826c83SDan Williams nd_label_gen_id(&label_id, label_uuid, flags); 3884a826c83SDan Williams res = nvdimm_allocate_dpa(ndd, &label_id, 3894a826c83SDan Williams __le64_to_cpu(nd_label->dpa), 3904a826c83SDan Williams __le64_to_cpu(nd_label->rawsize)); 3914a826c83SDan Williams nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); 3924a826c83SDan Williams if (!res) 3934a826c83SDan Williams return -EBUSY; 3944a826c83SDan Williams } 3954a826c83SDan Williams 3964a826c83SDan Williams return 0; 3974a826c83SDan Williams } 398bf9bccc1SDan Williams 399bf9bccc1SDan Williams int nd_label_active_count(struct nvdimm_drvdata *ndd) 400bf9bccc1SDan Williams { 401bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 402bf9bccc1SDan Williams unsigned long *free; 403bf9bccc1SDan Williams u32 nslot, slot; 404bf9bccc1SDan Williams int count = 0; 405bf9bccc1SDan Williams 406bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 407bf9bccc1SDan Williams return 0; 408bf9bccc1SDan Williams 409bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 410bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 411bf9bccc1SDan Williams 412564e871aSDan Williams nd_label = to_label(ndd, slot); 413bf9bccc1SDan Williams 414355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) { 415bf9bccc1SDan Williams u32 label_slot = __le32_to_cpu(nd_label->slot); 416bf9bccc1SDan Williams u64 size = __le64_to_cpu(nd_label->rawsize); 417bf9bccc1SDan Williams u64 dpa = __le64_to_cpu(nd_label->dpa); 418bf9bccc1SDan Williams 419bf9bccc1SDan Williams dev_dbg(ndd->dev, 420*426824d6SDan Williams "slot%d invalid slot: %d dpa: %llx size: %llx\n", 421*426824d6SDan Williams slot, label_slot, dpa, size); 422bf9bccc1SDan Williams continue; 423bf9bccc1SDan Williams } 424bf9bccc1SDan Williams count++; 425bf9bccc1SDan Williams } 426bf9bccc1SDan Williams return count; 427bf9bccc1SDan Williams } 428bf9bccc1SDan Williams 429bf9bccc1SDan Williams struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) 430bf9bccc1SDan Williams { 431bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 432bf9bccc1SDan Williams unsigned long *free; 433bf9bccc1SDan Williams u32 nslot, slot; 434bf9bccc1SDan Williams 435bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 436bf9bccc1SDan Williams return NULL; 437bf9bccc1SDan Williams 438bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 439bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 440bf9bccc1SDan Williams 441564e871aSDan Williams nd_label = to_label(ndd, slot); 442355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 443bf9bccc1SDan Williams continue; 444bf9bccc1SDan Williams 445bf9bccc1SDan Williams if (n-- == 0) 446564e871aSDan Williams return to_label(ndd, slot); 447bf9bccc1SDan Williams } 448bf9bccc1SDan Williams 449bf9bccc1SDan Williams return NULL; 450bf9bccc1SDan Williams } 451f524bf27SDan Williams 4520ba1c634SDan Williams u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) 453f524bf27SDan Williams { 454f524bf27SDan Williams struct nd_namespace_index *nsindex; 455f524bf27SDan Williams unsigned long *free; 456f524bf27SDan Williams u32 nslot, slot; 457f524bf27SDan Williams 458f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 459f524bf27SDan Williams return UINT_MAX; 460f524bf27SDan Williams 461f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 462f524bf27SDan Williams 463f524bf27SDan Williams slot = find_next_bit_le(free, nslot, 0); 464f524bf27SDan Williams if (slot == nslot) 465f524bf27SDan Williams return UINT_MAX; 466f524bf27SDan Williams 467f524bf27SDan Williams clear_bit_le(slot, free); 468f524bf27SDan Williams 469f524bf27SDan Williams return slot; 470f524bf27SDan Williams } 471f524bf27SDan Williams 4720ba1c634SDan Williams bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) 473f524bf27SDan Williams { 474f524bf27SDan Williams struct nd_namespace_index *nsindex; 475f524bf27SDan Williams unsigned long *free; 476f524bf27SDan Williams u32 nslot; 477f524bf27SDan Williams 478f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 479f524bf27SDan Williams return false; 480f524bf27SDan Williams 481f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 482f524bf27SDan Williams 483f524bf27SDan Williams if (slot < nslot) 484f524bf27SDan Williams return !test_and_set_bit_le(slot, free); 485f524bf27SDan Williams return false; 486f524bf27SDan Williams } 487f524bf27SDan Williams 488f524bf27SDan Williams u32 nd_label_nfree(struct nvdimm_drvdata *ndd) 489f524bf27SDan Williams { 490f524bf27SDan Williams struct nd_namespace_index *nsindex; 491f524bf27SDan Williams unsigned long *free; 492f524bf27SDan Williams u32 nslot; 493f524bf27SDan Williams 494f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 495f524bf27SDan Williams 496f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 4970ba1c634SDan Williams return nvdimm_num_label_slots(ndd); 498f524bf27SDan Williams 499f524bf27SDan Williams return bitmap_weight(free, nslot); 500f524bf27SDan Williams } 501f524bf27SDan Williams 502f524bf27SDan Williams static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, 503f524bf27SDan Williams unsigned long flags) 504f524bf27SDan Williams { 505f524bf27SDan Williams struct nd_namespace_index *nsindex; 506f524bf27SDan Williams unsigned long offset; 507f524bf27SDan Williams u64 checksum; 508f524bf27SDan Williams u32 nslot; 509f524bf27SDan Williams int rc; 510f524bf27SDan Williams 511f524bf27SDan Williams nsindex = to_namespace_index(ndd, index); 512f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 513f524bf27SDan Williams nslot = nvdimm_num_label_slots(ndd); 514f524bf27SDan Williams else 515f524bf27SDan Williams nslot = __le32_to_cpu(nsindex->nslot); 516f524bf27SDan Williams 517f524bf27SDan Williams memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); 518564e871aSDan Williams memset(&nsindex->flags, 0, 3); 519564e871aSDan Williams nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; 520f524bf27SDan Williams nsindex->seq = __cpu_to_le32(seq); 521f524bf27SDan Williams offset = (unsigned long) nsindex 522f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 523f524bf27SDan Williams nsindex->myoff = __cpu_to_le64(offset); 524f524bf27SDan Williams nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); 525f524bf27SDan Williams offset = (unsigned long) to_namespace_index(ndd, 526f524bf27SDan Williams nd_label_next_nsindex(index)) 527f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 528f524bf27SDan Williams nsindex->otheroff = __cpu_to_le64(offset); 529f524bf27SDan Williams offset = (unsigned long) nd_label_base(ndd) 530f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 531f524bf27SDan Williams nsindex->labeloff = __cpu_to_le64(offset); 532f524bf27SDan Williams nsindex->nslot = __cpu_to_le32(nslot); 533f524bf27SDan Williams nsindex->major = __cpu_to_le16(1); 5348990cdf1SDan Williams if (sizeof_namespace_label(ndd) < 256) 535f524bf27SDan Williams nsindex->minor = __cpu_to_le16(1); 5368990cdf1SDan Williams else 5378990cdf1SDan Williams nsindex->minor = __cpu_to_le16(2); 538f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(0); 539f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) { 540f524bf27SDan Williams unsigned long *free = (unsigned long *) nsindex->free; 541f524bf27SDan Williams u32 nfree = ALIGN(nslot, BITS_PER_LONG); 542f524bf27SDan Williams int last_bits, i; 543f524bf27SDan Williams 544f524bf27SDan Williams memset(nsindex->free, 0xff, nfree / 8); 545f524bf27SDan Williams for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) 546f524bf27SDan Williams clear_bit_le(nslot + i, free); 547f524bf27SDan Williams } 548f524bf27SDan Williams checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); 549f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(checksum); 550f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), 551f524bf27SDan Williams nsindex, sizeof_namespace_index(ndd)); 552f524bf27SDan Williams if (rc < 0) 553f524bf27SDan Williams return rc; 554f524bf27SDan Williams 555f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 556f524bf27SDan Williams return 0; 557f524bf27SDan Williams 558f524bf27SDan Williams /* copy the index we just wrote to the new 'next' */ 559f524bf27SDan Williams WARN_ON(index != ndd->ns_next); 560f524bf27SDan Williams nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); 561f524bf27SDan Williams ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); 562f524bf27SDan Williams ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); 563f524bf27SDan Williams WARN_ON(ndd->ns_current == ndd->ns_next); 564f524bf27SDan Williams 565f524bf27SDan Williams return 0; 566f524bf27SDan Williams } 567f524bf27SDan Williams 568f524bf27SDan Williams static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, 569f524bf27SDan Williams struct nd_namespace_label *nd_label) 570f524bf27SDan Williams { 571f524bf27SDan Williams return (unsigned long) nd_label 572f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 573f524bf27SDan Williams } 574f524bf27SDan Williams 575b3fde74eSDan Williams enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) 576b3fde74eSDan Williams { 577b3fde74eSDan Williams if (guid_equal(guid, &nvdimm_btt_guid)) 578b3fde74eSDan Williams return NVDIMM_CCLASS_BTT; 57914e49454SVishal Verma else if (guid_equal(guid, &nvdimm_btt2_guid)) 58014e49454SVishal Verma return NVDIMM_CCLASS_BTT2; 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; 59614e49454SVishal Verma else if (claim_class == NVDIMM_CCLASS_BTT2) 59714e49454SVishal Verma return &nvdimm_btt2_guid; 598b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_PFN) 599b3fde74eSDan Williams return &nvdimm_pfn_guid; 600b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_DAX) 601b3fde74eSDan Williams return &nvdimm_dax_guid; 602b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { 603b3fde74eSDan Williams /* 604b3fde74eSDan Williams * If we're modifying a namespace for which we don't 605b3fde74eSDan Williams * know the claim_class, don't touch the existing guid. 606b3fde74eSDan Williams */ 607b3fde74eSDan Williams return target; 608b3fde74eSDan Williams } else 609b3fde74eSDan Williams return &guid_null; 610b3fde74eSDan Williams } 611b3fde74eSDan Williams 612f524bf27SDan Williams static int __pmem_label_update(struct nd_region *nd_region, 613f524bf27SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, 614f524bf27SDan Williams int pos) 615f524bf27SDan Williams { 616b3fde74eSDan Williams struct nd_namespace_common *ndns = &nspm->nsio.common; 617faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 618f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 61916660eaeSDan Williams struct nd_label_ent *label_ent, *victim = NULL; 620f524bf27SDan Williams struct nd_namespace_label *nd_label; 621f524bf27SDan Williams struct nd_namespace_index *nsindex; 62216660eaeSDan Williams struct nd_label_id label_id; 62316660eaeSDan Williams struct resource *res; 624f524bf27SDan Williams unsigned long *free; 625f524bf27SDan Williams u32 nslot, slot; 626f524bf27SDan Williams size_t offset; 627c12c48ceSDan Williams u64 cookie; 628f524bf27SDan Williams int rc; 629f524bf27SDan Williams 630f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 631f524bf27SDan Williams return -ENXIO; 632f524bf27SDan Williams 633c12c48ceSDan Williams cookie = nd_region_interleave_set_cookie(nd_region, nsindex); 63416660eaeSDan Williams nd_label_gen_id(&label_id, nspm->uuid, 0); 63516660eaeSDan Williams for_each_dpa_resource(ndd, res) 63616660eaeSDan Williams if (strcmp(res->name, label_id.id) == 0) 63716660eaeSDan Williams break; 63816660eaeSDan Williams 63916660eaeSDan Williams if (!res) { 64016660eaeSDan Williams WARN_ON_ONCE(1); 64116660eaeSDan Williams return -ENXIO; 64216660eaeSDan Williams } 64316660eaeSDan Williams 644f524bf27SDan Williams /* allocate and write the label to the staging (next) index */ 645f524bf27SDan Williams slot = nd_label_alloc_slot(ndd); 646f524bf27SDan Williams if (slot == UINT_MAX) 647f524bf27SDan Williams return -ENXIO; 648*426824d6SDan Williams dev_dbg(ndd->dev, "allocated: %d\n", slot); 649f524bf27SDan Williams 650564e871aSDan Williams nd_label = to_label(ndd, slot); 651564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 652f524bf27SDan Williams memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); 653f524bf27SDan Williams if (nspm->alt_name) 654f524bf27SDan Williams memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); 655f524bf27SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING); 656f524bf27SDan Williams nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); 657f524bf27SDan Williams nd_label->position = __cpu_to_le16(pos); 658f524bf27SDan Williams nd_label->isetcookie = __cpu_to_le64(cookie); 65916660eaeSDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 6602de5148fSDan Williams nd_label->lbasize = __cpu_to_le64(nspm->lbasize); 66116660eaeSDan Williams nd_label->dpa = __cpu_to_le64(res->start); 662f524bf27SDan Williams nd_label->slot = __cpu_to_le32(slot); 663faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 664faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 665b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 666b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 667b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 668b3fde74eSDan Williams &nd_label->abstraction_guid)); 669355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 670355d8388SDan Williams u64 sum; 671355d8388SDan Williams 672355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 673355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 674355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 675355d8388SDan Williams } 676*426824d6SDan Williams nd_dbg_dpa(nd_region, ndd, res, "\n"); 677f524bf27SDan Williams 678f524bf27SDan Williams /* update label */ 679f524bf27SDan Williams offset = nd_label_offset(ndd, nd_label); 680f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 681564e871aSDan Williams sizeof_namespace_label(ndd)); 682f524bf27SDan Williams if (rc < 0) 683f524bf27SDan Williams return rc; 684f524bf27SDan Williams 685f524bf27SDan Williams /* Garbage collect the previous label */ 686ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 68716660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) { 68816660eaeSDan Williams if (!label_ent->label) 68916660eaeSDan Williams continue; 69016660eaeSDan Williams if (memcmp(nspm->uuid, label_ent->label->uuid, 69116660eaeSDan Williams NSLABEL_UUID_LEN) != 0) 69216660eaeSDan Williams continue; 69316660eaeSDan Williams victim = label_ent; 69416660eaeSDan Williams list_move_tail(&victim->list, &nd_mapping->labels); 69516660eaeSDan Williams break; 69616660eaeSDan Williams } 69716660eaeSDan Williams if (victim) { 698*426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 69916660eaeSDan Williams slot = to_slot(ndd, victim->label); 70016660eaeSDan Williams nd_label_free_slot(ndd, slot); 70116660eaeSDan Williams victim->label = NULL; 702f524bf27SDan Williams } 703f524bf27SDan Williams 704f524bf27SDan Williams /* update index */ 705f524bf27SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 706f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 70716660eaeSDan Williams if (rc == 0) { 70816660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 70916660eaeSDan Williams if (!label_ent->label) { 710ae8219f1SDan Williams label_ent->label = nd_label; 71116660eaeSDan Williams nd_label = NULL; 71216660eaeSDan Williams break; 71316660eaeSDan Williams } 71416660eaeSDan Williams dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, 71516660eaeSDan Williams "failed to track label: %d\n", 71616660eaeSDan Williams to_slot(ndd, nd_label)); 71716660eaeSDan Williams if (nd_label) 71816660eaeSDan Williams rc = -ENXIO; 71916660eaeSDan Williams } 720ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 721ae8219f1SDan Williams 722f524bf27SDan Williams return rc; 7230ba1c634SDan Williams } 7240ba1c634SDan Williams 7250ba1c634SDan Williams static bool is_old_resource(struct resource *res, struct resource **list, int n) 726f524bf27SDan Williams { 727f524bf27SDan Williams int i; 7280ba1c634SDan Williams 7290ba1c634SDan Williams if (res->flags & DPA_RESOURCE_ADJUSTED) 7300ba1c634SDan Williams return false; 7310ba1c634SDan Williams for (i = 0; i < n; i++) 7320ba1c634SDan Williams if (res == list[i]) 7330ba1c634SDan Williams return true; 7340ba1c634SDan Williams return false; 7350ba1c634SDan Williams } 7360ba1c634SDan Williams 7370ba1c634SDan Williams static struct resource *to_resource(struct nvdimm_drvdata *ndd, 7380ba1c634SDan Williams struct nd_namespace_label *nd_label) 7390ba1c634SDan Williams { 7400ba1c634SDan Williams struct resource *res; 7410ba1c634SDan Williams 7420ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7430ba1c634SDan Williams if (res->start != __le64_to_cpu(nd_label->dpa)) 7440ba1c634SDan Williams continue; 7450ba1c634SDan Williams if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) 7460ba1c634SDan Williams continue; 7470ba1c634SDan Williams return res; 7480ba1c634SDan Williams } 7490ba1c634SDan Williams 7500ba1c634SDan Williams return NULL; 7510ba1c634SDan Williams } 7520ba1c634SDan Williams 7530ba1c634SDan Williams /* 7540ba1c634SDan Williams * 1/ Account all the labels that can be freed after this update 7550ba1c634SDan Williams * 2/ Allocate and write the label to the staging (next) index 7560ba1c634SDan Williams * 3/ Record the resources in the namespace device 7570ba1c634SDan Williams */ 7580ba1c634SDan Williams static int __blk_label_update(struct nd_region *nd_region, 7590ba1c634SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, 7600ba1c634SDan Williams int num_labels) 7610ba1c634SDan Williams { 762ae8219f1SDan Williams int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; 763faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 764b3fde74eSDan Williams struct nd_namespace_common *ndns = &nsblk->common; 765f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 7660ba1c634SDan Williams struct nd_namespace_label *nd_label; 767ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 7680ba1c634SDan Williams struct nd_namespace_index *nsindex; 7690ba1c634SDan Williams unsigned long *free, *victim_map = NULL; 7700ba1c634SDan Williams struct resource *res, **old_res_list; 7710ba1c634SDan Williams struct nd_label_id label_id; 7720ba1c634SDan Williams u8 uuid[NSLABEL_UUID_LEN]; 7733934d841SDan Williams int min_dpa_idx = 0; 774ae8219f1SDan Williams LIST_HEAD(list); 7750ba1c634SDan Williams u32 nslot, slot; 776f524bf27SDan Williams 7770ba1c634SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 7780ba1c634SDan Williams return -ENXIO; 779f524bf27SDan Williams 7800ba1c634SDan Williams old_res_list = nsblk->res; 7810ba1c634SDan Williams nfree = nd_label_nfree(ndd); 7820ba1c634SDan Williams old_num_resources = nsblk->num_resources; 7830ba1c634SDan Williams nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); 7840ba1c634SDan Williams 7850ba1c634SDan Williams /* 7860ba1c634SDan Williams * We need to loop over the old resources a few times, which seems a 7870ba1c634SDan Williams * bit inefficient, but we need to know that we have the label 7880ba1c634SDan Williams * space before we start mutating the tracking structures. 7890ba1c634SDan Williams * Otherwise the recovery method of last resort for userspace is 7900ba1c634SDan Williams * disable and re-enable the parent region. 7910ba1c634SDan Williams */ 7920ba1c634SDan Williams alloc = 0; 7930ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 7940ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 7950ba1c634SDan Williams continue; 7960ba1c634SDan Williams if (!is_old_resource(res, old_res_list, old_num_resources)) 7970ba1c634SDan Williams alloc++; 7980ba1c634SDan Williams } 7990ba1c634SDan Williams 8000ba1c634SDan Williams victims = 0; 8010ba1c634SDan Williams if (old_num_resources) { 8020ba1c634SDan Williams /* convert old local-label-map to dimm-slot victim-map */ 8030ba1c634SDan Williams victim_map = kcalloc(BITS_TO_LONGS(nslot), sizeof(long), 8040ba1c634SDan Williams GFP_KERNEL); 8050ba1c634SDan Williams if (!victim_map) 8060ba1c634SDan Williams return -ENOMEM; 8070ba1c634SDan Williams 8080ba1c634SDan Williams /* mark unused labels for garbage collection */ 8090ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 810564e871aSDan Williams nd_label = to_label(ndd, slot); 8110ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 8120ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 8130ba1c634SDan Williams continue; 8140ba1c634SDan Williams res = to_resource(ndd, nd_label); 8150ba1c634SDan Williams if (res && is_old_resource(res, old_res_list, 8160ba1c634SDan Williams old_num_resources)) 8170ba1c634SDan Williams continue; 8180ba1c634SDan Williams slot = to_slot(ndd, nd_label); 8190ba1c634SDan Williams set_bit(slot, victim_map); 8200ba1c634SDan Williams victims++; 8210ba1c634SDan Williams } 8220ba1c634SDan Williams } 8230ba1c634SDan Williams 8240ba1c634SDan Williams /* don't allow updates that consume the last label */ 8250ba1c634SDan Williams if (nfree - alloc < 0 || nfree - alloc + victims < 1) { 8268c2f7e86SDan Williams dev_info(&nsblk->common.dev, "insufficient label space\n"); 8270ba1c634SDan Williams kfree(victim_map); 8280ba1c634SDan Williams return -ENOSPC; 8290ba1c634SDan Williams } 8300ba1c634SDan Williams /* from here on we need to abort on error */ 8310ba1c634SDan Williams 8320ba1c634SDan Williams 8330ba1c634SDan Williams /* assign all resources to the namespace before writing the labels */ 8340ba1c634SDan Williams nsblk->res = NULL; 8350ba1c634SDan Williams nsblk->num_resources = 0; 8360ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 8370ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 8380ba1c634SDan Williams continue; 8390ba1c634SDan Williams if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { 8400ba1c634SDan Williams rc = -ENOMEM; 8410ba1c634SDan Williams goto abort; 8420ba1c634SDan Williams } 8430ba1c634SDan Williams } 8440ba1c634SDan Williams 8453934d841SDan Williams /* 8463934d841SDan Williams * Find the resource associated with the first label in the set 8473934d841SDan Williams * per the v1.2 namespace specification. 8483934d841SDan Williams */ 8493934d841SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8503934d841SDan Williams struct resource *min = nsblk->res[min_dpa_idx]; 8513934d841SDan Williams 8523934d841SDan Williams res = nsblk->res[i]; 8533934d841SDan Williams if (res->start < min->start) 8543934d841SDan Williams min_dpa_idx = i; 8553934d841SDan Williams } 8563934d841SDan Williams 8570ba1c634SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 8580ba1c634SDan Williams size_t offset; 8590ba1c634SDan Williams 8600ba1c634SDan Williams res = nsblk->res[i]; 8610ba1c634SDan Williams if (is_old_resource(res, old_res_list, old_num_resources)) 8620ba1c634SDan Williams continue; /* carry-over */ 8630ba1c634SDan Williams slot = nd_label_alloc_slot(ndd); 8640ba1c634SDan Williams if (slot == UINT_MAX) 8650ba1c634SDan Williams goto abort; 866*426824d6SDan Williams dev_dbg(ndd->dev, "allocated: %d\n", slot); 8670ba1c634SDan Williams 868564e871aSDan Williams nd_label = to_label(ndd, slot); 869564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 8700ba1c634SDan Williams memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); 8710ba1c634SDan Williams if (nsblk->alt_name) 8720ba1c634SDan Williams memcpy(nd_label->name, nsblk->alt_name, 8730ba1c634SDan Williams NSLABEL_NAME_LEN); 8740ba1c634SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); 8758f2bc243SDan Williams 8768f2bc243SDan Williams /* 8778f2bc243SDan Williams * Use the presence of the type_guid as a flag to 8783934d841SDan Williams * determine isetcookie usage and nlabel + position 8793934d841SDan Williams * policy for blk-aperture namespaces. 8808f2bc243SDan Williams */ 8813934d841SDan Williams if (namespace_label_has(ndd, type_guid)) { 8823934d841SDan Williams if (i == min_dpa_idx) { 8833934d841SDan Williams nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); 8843934d841SDan Williams nd_label->position = __cpu_to_le16(0); 8853934d841SDan Williams } else { 8863934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0xffff); 8873934d841SDan Williams nd_label->position = __cpu_to_le16(0xffff); 8883934d841SDan Williams } 8898f2bc243SDan Williams nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); 8903934d841SDan Williams } else { 8913934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0); /* N/A */ 8923934d841SDan Williams nd_label->position = __cpu_to_le16(0); /* N/A */ 8930ba1c634SDan Williams nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ 8943934d841SDan Williams } 8958f2bc243SDan Williams 8960ba1c634SDan Williams nd_label->dpa = __cpu_to_le64(res->start); 8970ba1c634SDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 8980ba1c634SDan Williams nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); 8990ba1c634SDan Williams nd_label->slot = __cpu_to_le32(slot); 900faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 901faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 902b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 903b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 904b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 905b3fde74eSDan Williams &nd_label->abstraction_guid)); 906b3fde74eSDan Williams 907355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 908355d8388SDan Williams u64 sum; 909355d8388SDan Williams 910355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 911355d8388SDan Williams sum = nd_fletcher64(nd_label, 912355d8388SDan Williams sizeof_namespace_label(ndd), 1); 913355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 914355d8388SDan Williams } 9150ba1c634SDan Williams 9160ba1c634SDan Williams /* update label */ 9170ba1c634SDan Williams offset = nd_label_offset(ndd, nd_label); 9180ba1c634SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 919564e871aSDan Williams sizeof_namespace_label(ndd)); 9200ba1c634SDan Williams if (rc < 0) 9210ba1c634SDan Williams goto abort; 9220ba1c634SDan Williams } 9230ba1c634SDan Williams 9240ba1c634SDan Williams /* free up now unused slots in the new index */ 9250ba1c634SDan Williams for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { 926*426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 9270ba1c634SDan Williams nd_label_free_slot(ndd, slot); 9280ba1c634SDan Williams } 9290ba1c634SDan Williams 9300ba1c634SDan Williams /* update index */ 9310ba1c634SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 9320ba1c634SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 9330ba1c634SDan Williams if (rc) 9340ba1c634SDan Williams goto abort; 9350ba1c634SDan Williams 9360ba1c634SDan Williams /* 9370ba1c634SDan Williams * Now that the on-dimm labels are up to date, fix up the tracking 9380ba1c634SDan Williams * entries in nd_mapping->labels 9390ba1c634SDan Williams */ 9400ba1c634SDan Williams nlabel = 0; 941ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 942ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 943ae8219f1SDan Williams nd_label = label_ent->label; 944ae8219f1SDan Williams if (!nd_label) 945ae8219f1SDan Williams continue; 9460ba1c634SDan Williams nlabel++; 9470ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9480ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9490ba1c634SDan Williams continue; 9500ba1c634SDan Williams nlabel--; 951ae8219f1SDan Williams list_move(&label_ent->list, &list); 952ae8219f1SDan Williams label_ent->label = NULL; 9530ba1c634SDan Williams } 954ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 955ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 956ae8219f1SDan Williams 9570ba1c634SDan Williams if (nlabel + nsblk->num_resources > num_labels) { 9580ba1c634SDan Williams /* 9590ba1c634SDan Williams * Bug, we can't end up with more resources than 9600ba1c634SDan Williams * available labels 9610ba1c634SDan Williams */ 9620ba1c634SDan Williams WARN_ON_ONCE(1); 9630ba1c634SDan Williams rc = -ENXIO; 9640ba1c634SDan Williams goto out; 9650ba1c634SDan Williams } 9660ba1c634SDan Williams 967ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 968ae8219f1SDan Williams label_ent = list_first_entry_or_null(&nd_mapping->labels, 969ae8219f1SDan Williams typeof(*label_ent), list); 970ae8219f1SDan Williams if (!label_ent) { 971ae8219f1SDan Williams WARN_ON(1); 972ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 973ae8219f1SDan Williams rc = -ENXIO; 974ae8219f1SDan Williams goto out; 975ae8219f1SDan Williams } 9760ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 977564e871aSDan Williams nd_label = to_label(ndd, slot); 9780ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9790ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9800ba1c634SDan Williams continue; 9810ba1c634SDan Williams res = to_resource(ndd, nd_label); 9820ba1c634SDan Williams res->flags &= ~DPA_RESOURCE_ADJUSTED; 983ae8219f1SDan Williams dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); 984ae8219f1SDan Williams list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { 985ae8219f1SDan Williams if (label_ent->label) 986ae8219f1SDan Williams continue; 987ae8219f1SDan Williams label_ent->label = nd_label; 988ae8219f1SDan Williams nd_label = NULL; 989ae8219f1SDan Williams break; 9900ba1c634SDan Williams } 991ae8219f1SDan Williams if (nd_label) 992ae8219f1SDan Williams dev_WARN(&nsblk->common.dev, 993ae8219f1SDan Williams "failed to track label slot%d\n", slot); 994ae8219f1SDan Williams } 995ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 9960ba1c634SDan Williams 9970ba1c634SDan Williams out: 9980ba1c634SDan Williams kfree(old_res_list); 9990ba1c634SDan Williams kfree(victim_map); 10000ba1c634SDan Williams return rc; 10010ba1c634SDan Williams 10020ba1c634SDan Williams abort: 10030ba1c634SDan Williams /* 10040ba1c634SDan Williams * 1/ repair the allocated label bitmap in the index 10050ba1c634SDan Williams * 2/ restore the resource list 10060ba1c634SDan Williams */ 10070ba1c634SDan Williams nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); 10080ba1c634SDan Williams kfree(nsblk->res); 10090ba1c634SDan Williams nsblk->res = old_res_list; 10100ba1c634SDan Williams nsblk->num_resources = old_num_resources; 10110ba1c634SDan Williams old_res_list = NULL; 10120ba1c634SDan Williams goto out; 10130ba1c634SDan Williams } 10140ba1c634SDan Williams 10150ba1c634SDan Williams static int init_labels(struct nd_mapping *nd_mapping, int num_labels) 10160ba1c634SDan Williams { 1017ae8219f1SDan Williams int i, old_num_labels = 0; 1018ae8219f1SDan Williams struct nd_label_ent *label_ent; 10190ba1c634SDan Williams struct nd_namespace_index *nsindex; 10200ba1c634SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 10210ba1c634SDan Williams 1022ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1023ae8219f1SDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 10240ba1c634SDan Williams old_num_labels++; 1025ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10260ba1c634SDan Williams 10270ba1c634SDan Williams /* 10280ba1c634SDan Williams * We need to preserve all the old labels for the mapping so 10290ba1c634SDan Williams * they can be garbage collected after writing the new labels. 10300ba1c634SDan Williams */ 1031ae8219f1SDan Williams for (i = old_num_labels; i < num_labels; i++) { 1032ae8219f1SDan Williams label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); 1033ae8219f1SDan Williams if (!label_ent) 10340ba1c634SDan Williams return -ENOMEM; 1035ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1036ae8219f1SDan Williams list_add_tail(&label_ent->list, &nd_mapping->labels); 1037ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 10380ba1c634SDan Williams } 10390ba1c634SDan Williams 1040f524bf27SDan Williams if (ndd->ns_current == -1 || ndd->ns_next == -1) 1041f524bf27SDan Williams /* pass */; 1042f524bf27SDan Williams else 10430ba1c634SDan Williams return max(num_labels, old_num_labels); 1044f524bf27SDan Williams 1045f524bf27SDan Williams nsindex = to_namespace_index(ndd, 0); 1046f524bf27SDan Williams memset(nsindex, 0, ndd->nsarea.config_size); 1047f524bf27SDan Williams for (i = 0; i < 2; i++) { 1048b18d4b8aSDan Williams int rc = nd_label_write_index(ndd, i, 3 - i, ND_NSINDEX_INIT); 1049f524bf27SDan Williams 1050f524bf27SDan Williams if (rc) 1051f524bf27SDan Williams return rc; 1052f524bf27SDan Williams } 1053f524bf27SDan Williams ndd->ns_next = 1; 1054f524bf27SDan Williams ndd->ns_current = 0; 1055f524bf27SDan Williams 10560ba1c634SDan Williams return max(num_labels, old_num_labels); 1057f524bf27SDan Williams } 1058f524bf27SDan Williams 1059f524bf27SDan Williams static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) 1060f524bf27SDan Williams { 1061f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 1062ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 1063f524bf27SDan Williams struct nd_namespace_index *nsindex; 1064f524bf27SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 1065f524bf27SDan Williams unsigned long *free; 1066ae8219f1SDan Williams LIST_HEAD(list); 1067f524bf27SDan Williams u32 nslot, slot; 1068ae8219f1SDan Williams int active = 0; 1069f524bf27SDan Williams 1070f524bf27SDan Williams if (!uuid) 1071f524bf27SDan Williams return 0; 1072f524bf27SDan Williams 1073f524bf27SDan Williams /* no index || no labels == nothing to delete */ 1074ae8219f1SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 1075f524bf27SDan Williams return 0; 1076f524bf27SDan Williams 1077ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1078ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 1079ae8219f1SDan Williams struct nd_namespace_label *nd_label = label_ent->label; 1080ae8219f1SDan Williams 1081ae8219f1SDan Williams if (!nd_label) 1082ae8219f1SDan Williams continue; 1083ae8219f1SDan Williams active++; 1084f524bf27SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 1085f524bf27SDan Williams if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) 1086f524bf27SDan Williams continue; 1087ae8219f1SDan Williams active--; 1088f524bf27SDan Williams slot = to_slot(ndd, nd_label); 1089f524bf27SDan Williams nd_label_free_slot(ndd, slot); 1090*426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 1091ae8219f1SDan Williams list_move_tail(&label_ent->list, &list); 1092ae8219f1SDan Williams label_ent->label = NULL; 1093f524bf27SDan Williams } 1094ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 1095f524bf27SDan Williams 1096ae8219f1SDan Williams if (active == 0) { 1097ae8219f1SDan Williams nd_mapping_free_labels(nd_mapping); 1098*426824d6SDan Williams dev_dbg(ndd->dev, "no more active labels\n"); 1099f524bf27SDan Williams } 1100ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1101f524bf27SDan Williams 1102f524bf27SDan Williams return nd_label_write_index(ndd, ndd->ns_next, 1103f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 1104f524bf27SDan Williams } 1105f524bf27SDan Williams 1106f524bf27SDan Williams int nd_pmem_namespace_label_update(struct nd_region *nd_region, 1107f524bf27SDan Williams struct nd_namespace_pmem *nspm, resource_size_t size) 1108f524bf27SDan Williams { 1109f524bf27SDan Williams int i; 1110f524bf27SDan Williams 1111f524bf27SDan Williams for (i = 0; i < nd_region->ndr_mappings; i++) { 1112f524bf27SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 111316660eaeSDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 111416660eaeSDan Williams struct resource *res; 111516660eaeSDan Williams int rc, count = 0; 1116f524bf27SDan Williams 1117f524bf27SDan Williams if (size == 0) { 1118f524bf27SDan Williams rc = del_labels(nd_mapping, nspm->uuid); 1119f524bf27SDan Williams if (rc) 1120f524bf27SDan Williams return rc; 1121f524bf27SDan Williams continue; 1122f524bf27SDan Williams } 1123f524bf27SDan Williams 112416660eaeSDan Williams for_each_dpa_resource(ndd, res) 11252d9a0274SNicolas Iooss if (strncmp(res->name, "pmem", 4) == 0) 112616660eaeSDan Williams count++; 112716660eaeSDan Williams WARN_ON_ONCE(!count); 112816660eaeSDan Williams 112916660eaeSDan Williams rc = init_labels(nd_mapping, count); 11300ba1c634SDan Williams if (rc < 0) 1131f524bf27SDan Williams return rc; 1132f524bf27SDan Williams 1133f524bf27SDan Williams rc = __pmem_label_update(nd_region, nd_mapping, nspm, i); 1134f524bf27SDan Williams if (rc) 1135f524bf27SDan Williams return rc; 1136f524bf27SDan Williams } 1137f524bf27SDan Williams 1138f524bf27SDan Williams return 0; 1139f524bf27SDan Williams } 11400ba1c634SDan Williams 11410ba1c634SDan Williams int nd_blk_namespace_label_update(struct nd_region *nd_region, 11420ba1c634SDan Williams struct nd_namespace_blk *nsblk, resource_size_t size) 11430ba1c634SDan Williams { 11440ba1c634SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[0]; 11450ba1c634SDan Williams struct resource *res; 11460ba1c634SDan Williams int count = 0; 11470ba1c634SDan Williams 11480ba1c634SDan Williams if (size == 0) 11490ba1c634SDan Williams return del_labels(nd_mapping, nsblk->uuid); 11500ba1c634SDan Williams 11510ba1c634SDan Williams for_each_dpa_resource(to_ndd(nd_mapping), res) 11520ba1c634SDan Williams count++; 11530ba1c634SDan Williams 11540ba1c634SDan Williams count = init_labels(nd_mapping, count); 11550ba1c634SDan Williams if (count < 0) 11560ba1c634SDan Williams return count; 11570ba1c634SDan Williams 11580ba1c634SDan Williams return __blk_label_update(nd_region, nd_mapping, nsblk, count); 11590ba1c634SDan Williams } 1160b3fde74eSDan Williams 1161b3fde74eSDan Williams int __init nd_label_init(void) 1162b3fde74eSDan Williams { 1163b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); 116414e49454SVishal Verma WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); 1165b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); 1166b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); 1167b3fde74eSDan Williams 1168b3fde74eSDan Williams return 0; 1169b3fde74eSDan Williams } 1170