14a826c83SDan Williams /* 24a826c83SDan Williams * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. 34a826c83SDan Williams * 44a826c83SDan Williams * This program is free software; you can redistribute it and/or modify 54a826c83SDan Williams * it under the terms of version 2 of the GNU General Public License as 64a826c83SDan Williams * published by the Free Software Foundation. 74a826c83SDan Williams * 84a826c83SDan Williams * This program is distributed in the hope that it will be useful, but 94a826c83SDan Williams * WITHOUT ANY WARRANTY; without even the implied warranty of 104a826c83SDan Williams * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 114a826c83SDan Williams * General Public License for more details. 124a826c83SDan Williams */ 134a826c83SDan Williams #include <linux/device.h> 144a826c83SDan Williams #include <linux/ndctl.h> 15b3fde74eSDan Williams #include <linux/uuid.h> 16f524bf27SDan Williams #include <linux/slab.h> 174a826c83SDan Williams #include <linux/io.h> 184a826c83SDan Williams #include <linux/nd.h> 194a826c83SDan Williams #include "nd-core.h" 204a826c83SDan Williams #include "label.h" 214a826c83SDan Williams #include "nd.h" 224a826c83SDan Williams 23b3fde74eSDan Williams static guid_t nvdimm_btt_guid; 2414e49454SVishal Verma static guid_t nvdimm_btt2_guid; 25b3fde74eSDan Williams static guid_t nvdimm_pfn_guid; 26b3fde74eSDan Williams static guid_t nvdimm_dax_guid; 27b3fde74eSDan Williams 284a826c83SDan Williams static u32 best_seq(u32 a, u32 b) 294a826c83SDan Williams { 304a826c83SDan Williams a &= NSINDEX_SEQ_MASK; 314a826c83SDan Williams b &= NSINDEX_SEQ_MASK; 324a826c83SDan Williams 334a826c83SDan Williams if (a == 0 || a == b) 344a826c83SDan Williams return b; 354a826c83SDan Williams else if (b == 0) 364a826c83SDan Williams return a; 374a826c83SDan Williams else if (nd_inc_seq(a) == b) 384a826c83SDan Williams return b; 394a826c83SDan Williams else 404a826c83SDan Williams return a; 414a826c83SDan Williams } 424a826c83SDan Williams 43564e871aSDan Williams unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd) 44564e871aSDan Williams { 45564e871aSDan Williams return ndd->nslabel_size; 46564e871aSDan Williams } 47564e871aSDan Williams 489e694d9cSToshi Kani static size_t __sizeof_namespace_index(u32 nslot) 499e694d9cSToshi Kani { 509e694d9cSToshi Kani return ALIGN(sizeof(struct nd_namespace_index) + DIV_ROUND_UP(nslot, 8), 519e694d9cSToshi Kani NSINDEX_ALIGN); 529e694d9cSToshi Kani } 539e694d9cSToshi Kani 549e694d9cSToshi Kani static int __nvdimm_num_label_slots(struct nvdimm_drvdata *ndd, 559e694d9cSToshi Kani size_t index_size) 569e694d9cSToshi Kani { 579e694d9cSToshi Kani return (ndd->nsarea.config_size - index_size * 2) / 589e694d9cSToshi Kani sizeof_namespace_label(ndd); 599e694d9cSToshi Kani } 609e694d9cSToshi Kani 6102881768SDan Williams int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd) 6202881768SDan Williams { 639e694d9cSToshi Kani u32 tmp_nslot, n; 649e694d9cSToshi Kani 659e694d9cSToshi Kani tmp_nslot = ndd->nsarea.config_size / sizeof_namespace_label(ndd); 669e694d9cSToshi Kani n = __sizeof_namespace_index(tmp_nslot) / NSINDEX_ALIGN; 679e694d9cSToshi Kani 689e694d9cSToshi Kani return __nvdimm_num_label_slots(ndd, NSINDEX_ALIGN * n); 6902881768SDan Williams } 7002881768SDan Williams 714a826c83SDan Williams size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd) 724a826c83SDan Williams { 7302881768SDan Williams u32 nslot, space, size; 744a826c83SDan Williams 754a826c83SDan Williams /* 769e694d9cSToshi Kani * Per UEFI 2.7, the minimum size of the Label Storage Area is large 779e694d9cSToshi Kani * enough to hold 2 index blocks and 2 labels. The minimum index 781cfeb66eSAlexander Duyck * block size is 256 bytes. The label size is 128 for namespaces 791cfeb66eSAlexander Duyck * prior to version 1.2 and at minimum 256 for version 1.2 and later. 804a826c83SDan Williams */ 8102881768SDan Williams nslot = nvdimm_num_label_slots(ndd); 8202881768SDan Williams space = ndd->nsarea.config_size - nslot * sizeof_namespace_label(ndd); 839e694d9cSToshi Kani size = __sizeof_namespace_index(nslot) * 2; 849e694d9cSToshi Kani if (size <= space && nslot >= 2) 8502881768SDan Williams return size / 2; 864a826c83SDan Williams 8702881768SDan Williams dev_err(ndd->dev, "label area (%d) too small to host (%d byte) labels\n", 8802881768SDan Williams ndd->nsarea.config_size, sizeof_namespace_label(ndd)); 8902881768SDan Williams return 0; 90f524bf27SDan Williams } 91f524bf27SDan Williams 92564e871aSDan Williams static int __nd_label_validate(struct nvdimm_drvdata *ndd) 934a826c83SDan Williams { 944a826c83SDan Williams /* 954a826c83SDan Williams * On media label format consists of two index blocks followed 964a826c83SDan Williams * by an array of labels. None of these structures are ever 974a826c83SDan Williams * updated in place. A sequence number tracks the current 984a826c83SDan Williams * active index and the next one to write, while labels are 994a826c83SDan Williams * written to free slots. 1004a826c83SDan Williams * 1014a826c83SDan Williams * +------------+ 1024a826c83SDan Williams * | | 1034a826c83SDan Williams * | nsindex0 | 1044a826c83SDan Williams * | | 1054a826c83SDan Williams * +------------+ 1064a826c83SDan Williams * | | 1074a826c83SDan Williams * | nsindex1 | 1084a826c83SDan Williams * | | 1094a826c83SDan Williams * +------------+ 1104a826c83SDan Williams * | label0 | 1114a826c83SDan Williams * +------------+ 1124a826c83SDan Williams * | label1 | 1134a826c83SDan Williams * +------------+ 1144a826c83SDan Williams * | | 1154a826c83SDan Williams * ....nslot... 1164a826c83SDan Williams * | | 1174a826c83SDan Williams * +------------+ 1184a826c83SDan Williams * | labelN | 1194a826c83SDan Williams * +------------+ 1204a826c83SDan Williams */ 1214a826c83SDan Williams struct nd_namespace_index *nsindex[] = { 1224a826c83SDan Williams to_namespace_index(ndd, 0), 1234a826c83SDan Williams to_namespace_index(ndd, 1), 1244a826c83SDan Williams }; 1254a826c83SDan Williams const int num_index = ARRAY_SIZE(nsindex); 1264a826c83SDan Williams struct device *dev = ndd->dev; 1274a826c83SDan Williams bool valid[2] = { 0 }; 1284a826c83SDan Williams int i, num_valid = 0; 1294a826c83SDan Williams u32 seq; 1304a826c83SDan Williams 1314a826c83SDan Williams for (i = 0; i < num_index; i++) { 1324a826c83SDan Williams u32 nslot; 1334a826c83SDan Williams u8 sig[NSINDEX_SIG_LEN]; 1344a826c83SDan Williams u64 sum_save, sum, size; 135564e871aSDan Williams unsigned int version, labelsize; 1364a826c83SDan Williams 1374a826c83SDan Williams memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN); 1384a826c83SDan Williams if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) { 139426824d6SDan Williams dev_dbg(dev, "nsindex%d signature invalid\n", i); 1404a826c83SDan Williams continue; 1414a826c83SDan Williams } 142564e871aSDan Williams 143564e871aSDan Williams /* label sizes larger than 128 arrived with v1.2 */ 144564e871aSDan Williams version = __le16_to_cpu(nsindex[i]->major) * 100 145564e871aSDan Williams + __le16_to_cpu(nsindex[i]->minor); 146564e871aSDan Williams if (version >= 102) 147564e871aSDan Williams labelsize = 1 << (7 + nsindex[i]->labelsize); 148564e871aSDan Williams else 149564e871aSDan Williams labelsize = 128; 150564e871aSDan Williams 151564e871aSDan Williams if (labelsize != sizeof_namespace_label(ndd)) { 152426824d6SDan Williams dev_dbg(dev, "nsindex%d labelsize %d invalid\n", 153426824d6SDan Williams i, nsindex[i]->labelsize); 154564e871aSDan Williams continue; 155564e871aSDan Williams } 156564e871aSDan Williams 1574a826c83SDan Williams sum_save = __le64_to_cpu(nsindex[i]->checksum); 1584a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(0); 1594a826c83SDan Williams sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1); 1604a826c83SDan Williams nsindex[i]->checksum = __cpu_to_le64(sum_save); 1614a826c83SDan Williams if (sum != sum_save) { 162426824d6SDan Williams dev_dbg(dev, "nsindex%d checksum invalid\n", i); 1634a826c83SDan Williams continue; 1644a826c83SDan Williams } 1654a826c83SDan Williams 1664a826c83SDan Williams seq = __le32_to_cpu(nsindex[i]->seq); 1674a826c83SDan Williams if ((seq & NSINDEX_SEQ_MASK) == 0) { 168426824d6SDan Williams dev_dbg(dev, "nsindex%d sequence: %#x invalid\n", i, seq); 1694a826c83SDan Williams continue; 1704a826c83SDan Williams } 1714a826c83SDan Williams 1724a826c83SDan Williams /* sanity check the index against expected values */ 1734a826c83SDan Williams if (__le64_to_cpu(nsindex[i]->myoff) 1744a826c83SDan Williams != i * sizeof_namespace_index(ndd)) { 175426824d6SDan Williams dev_dbg(dev, "nsindex%d myoff: %#llx invalid\n", 176426824d6SDan Williams i, (unsigned long long) 1774a826c83SDan Williams __le64_to_cpu(nsindex[i]->myoff)); 1784a826c83SDan Williams continue; 1794a826c83SDan Williams } 1804a826c83SDan Williams if (__le64_to_cpu(nsindex[i]->otheroff) 1814a826c83SDan Williams != (!i) * sizeof_namespace_index(ndd)) { 182426824d6SDan Williams dev_dbg(dev, "nsindex%d otheroff: %#llx invalid\n", 183426824d6SDan Williams i, (unsigned long long) 1844a826c83SDan Williams __le64_to_cpu(nsindex[i]->otheroff)); 1854a826c83SDan Williams continue; 1864a826c83SDan Williams } 187d86d4d63SAlexander Duyck if (__le64_to_cpu(nsindex[i]->labeloff) 188d86d4d63SAlexander Duyck != 2 * sizeof_namespace_index(ndd)) { 189d86d4d63SAlexander Duyck dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n", 190d86d4d63SAlexander Duyck i, (unsigned long long) 191d86d4d63SAlexander Duyck __le64_to_cpu(nsindex[i]->labeloff)); 192d86d4d63SAlexander Duyck continue; 193d86d4d63SAlexander Duyck } 1944a826c83SDan Williams 1954a826c83SDan Williams size = __le64_to_cpu(nsindex[i]->mysize); 1964a826c83SDan Williams if (size > sizeof_namespace_index(ndd) 1974a826c83SDan Williams || size < sizeof(struct nd_namespace_index)) { 198426824d6SDan Williams dev_dbg(dev, "nsindex%d mysize: %#llx invalid\n", i, size); 1994a826c83SDan Williams continue; 2004a826c83SDan Williams } 2014a826c83SDan Williams 2024a826c83SDan Williams nslot = __le32_to_cpu(nsindex[i]->nslot); 203564e871aSDan Williams if (nslot * sizeof_namespace_label(ndd) 2044a826c83SDan Williams + 2 * sizeof_namespace_index(ndd) 2054a826c83SDan Williams > ndd->nsarea.config_size) { 206426824d6SDan Williams dev_dbg(dev, "nsindex%d nslot: %u invalid, config_size: %#x\n", 207426824d6SDan Williams i, nslot, ndd->nsarea.config_size); 2084a826c83SDan Williams continue; 2094a826c83SDan Williams } 2104a826c83SDan Williams valid[i] = true; 2114a826c83SDan Williams num_valid++; 2124a826c83SDan Williams } 2134a826c83SDan Williams 2144a826c83SDan Williams switch (num_valid) { 2154a826c83SDan Williams case 0: 2164a826c83SDan Williams break; 2174a826c83SDan Williams case 1: 2184a826c83SDan Williams for (i = 0; i < num_index; i++) 2194a826c83SDan Williams if (valid[i]) 2204a826c83SDan Williams return i; 2214a826c83SDan Williams /* can't have num_valid > 0 but valid[] = { false, false } */ 2224a826c83SDan Williams WARN_ON(1); 2234a826c83SDan Williams break; 2244a826c83SDan Williams default: 2254a826c83SDan Williams /* pick the best index... */ 2264a826c83SDan Williams seq = best_seq(__le32_to_cpu(nsindex[0]->seq), 2274a826c83SDan Williams __le32_to_cpu(nsindex[1]->seq)); 2284a826c83SDan Williams if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK)) 2294a826c83SDan Williams return 1; 2304a826c83SDan Williams else 2314a826c83SDan Williams return 0; 2324a826c83SDan Williams break; 2334a826c83SDan Williams } 2344a826c83SDan Williams 2354a826c83SDan Williams return -1; 2364a826c83SDan Williams } 2374a826c83SDan Williams 2387d47aad4SAlexander Duyck static int nd_label_validate(struct nvdimm_drvdata *ndd) 239564e871aSDan Williams { 240564e871aSDan Williams /* 241564e871aSDan Williams * In order to probe for and validate namespace index blocks we 242564e871aSDan Williams * need to know the size of the labels, and we can't trust the 243564e871aSDan Williams * size of the labels until we validate the index blocks. 244564e871aSDan Williams * Resolve this dependency loop by probing for known label 2458990cdf1SDan Williams * sizes, but default to v1.2 256-byte namespace labels if 2468990cdf1SDan Williams * discovery fails. 247564e871aSDan Williams */ 2488990cdf1SDan Williams int label_size[] = { 128, 256 }; 249564e871aSDan Williams int i, rc; 250564e871aSDan Williams 251564e871aSDan Williams for (i = 0; i < ARRAY_SIZE(label_size); i++) { 252564e871aSDan Williams ndd->nslabel_size = label_size[i]; 253564e871aSDan Williams rc = __nd_label_validate(ndd); 254564e871aSDan Williams if (rc >= 0) 255564e871aSDan Williams return rc; 256564e871aSDan Williams } 257564e871aSDan Williams 258564e871aSDan Williams return -1; 259564e871aSDan Williams } 260564e871aSDan Williams 2617d47aad4SAlexander Duyck static void nd_label_copy(struct nvdimm_drvdata *ndd, 2627d47aad4SAlexander Duyck struct nd_namespace_index *dst, 2634a826c83SDan Williams struct nd_namespace_index *src) 2644a826c83SDan Williams { 26519418b02SAlexander Duyck /* just exit if either destination or source is NULL */ 26619418b02SAlexander Duyck if (!dst || !src) 2674a826c83SDan Williams return; 2684a826c83SDan Williams 2694a826c83SDan Williams memcpy(dst, src, sizeof_namespace_index(ndd)); 2704a826c83SDan Williams } 2714a826c83SDan Williams 2724a826c83SDan Williams static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd) 2734a826c83SDan Williams { 2744a826c83SDan Williams void *base = to_namespace_index(ndd, 0); 2754a826c83SDan Williams 2764a826c83SDan Williams return base + 2 * sizeof_namespace_index(ndd); 2774a826c83SDan Williams } 2784a826c83SDan Williams 279f524bf27SDan Williams static int to_slot(struct nvdimm_drvdata *ndd, 280f524bf27SDan Williams struct nd_namespace_label *nd_label) 281f524bf27SDan Williams { 282564e871aSDan Williams unsigned long label, base; 283564e871aSDan Williams 284564e871aSDan Williams label = (unsigned long) nd_label; 285564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 286564e871aSDan Williams 287564e871aSDan Williams return (label - base) / sizeof_namespace_label(ndd); 288564e871aSDan Williams } 289564e871aSDan Williams 290564e871aSDan Williams static struct nd_namespace_label *to_label(struct nvdimm_drvdata *ndd, int slot) 291564e871aSDan Williams { 292564e871aSDan Williams unsigned long label, base; 293564e871aSDan Williams 294564e871aSDan Williams base = (unsigned long) nd_label_base(ndd); 295564e871aSDan Williams label = base + sizeof_namespace_label(ndd) * slot; 296564e871aSDan Williams 297564e871aSDan Williams return (struct nd_namespace_label *) label; 298f524bf27SDan Williams } 299f524bf27SDan Williams 3004a826c83SDan Williams #define for_each_clear_bit_le(bit, addr, size) \ 3014a826c83SDan Williams for ((bit) = find_next_zero_bit_le((addr), (size), 0); \ 3024a826c83SDan Williams (bit) < (size); \ 3034a826c83SDan Williams (bit) = find_next_zero_bit_le((addr), (size), (bit) + 1)) 3044a826c83SDan Williams 3054a826c83SDan Williams /** 306f524bf27SDan Williams * preamble_index - common variable initialization for nd_label_* routines 3074a826c83SDan Williams * @ndd: dimm container for the relevant label set 308f524bf27SDan Williams * @idx: namespace_index index 3094a826c83SDan Williams * @nsindex_out: on return set to the currently active namespace index 3104a826c83SDan Williams * @free: on return set to the free label bitmap in the index 3114a826c83SDan Williams * @nslot: on return set to the number of slots in the label space 3124a826c83SDan Williams */ 313f524bf27SDan Williams static bool preamble_index(struct nvdimm_drvdata *ndd, int idx, 3144a826c83SDan Williams struct nd_namespace_index **nsindex_out, 3154a826c83SDan Williams unsigned long **free, u32 *nslot) 3164a826c83SDan Williams { 3174a826c83SDan Williams struct nd_namespace_index *nsindex; 3184a826c83SDan Williams 319f524bf27SDan Williams nsindex = to_namespace_index(ndd, idx); 3204a826c83SDan Williams if (nsindex == NULL) 3214a826c83SDan Williams return false; 3224a826c83SDan Williams 3234a826c83SDan Williams *free = (unsigned long *) nsindex->free; 3244a826c83SDan Williams *nslot = __le32_to_cpu(nsindex->nslot); 3254a826c83SDan Williams *nsindex_out = nsindex; 3264a826c83SDan Williams 3274a826c83SDan Williams return true; 3284a826c83SDan Williams } 3294a826c83SDan Williams 330bf9bccc1SDan Williams char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags) 3314a826c83SDan Williams { 3324a826c83SDan Williams if (!label_id || !uuid) 3334a826c83SDan Williams return NULL; 3344a826c83SDan Williams snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", 3354a826c83SDan Williams flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); 3364a826c83SDan Williams return label_id->id; 3374a826c83SDan Williams } 3384a826c83SDan Williams 339f524bf27SDan Williams static bool preamble_current(struct nvdimm_drvdata *ndd, 340f524bf27SDan Williams struct nd_namespace_index **nsindex, 341f524bf27SDan Williams unsigned long **free, u32 *nslot) 342f524bf27SDan Williams { 343f524bf27SDan Williams return preamble_index(ndd, ndd->ns_current, nsindex, 344f524bf27SDan Williams free, nslot); 345f524bf27SDan Williams } 346f524bf27SDan Williams 347f524bf27SDan Williams static bool preamble_next(struct nvdimm_drvdata *ndd, 348f524bf27SDan Williams struct nd_namespace_index **nsindex, 349f524bf27SDan Williams unsigned long **free, u32 *nslot) 350f524bf27SDan Williams { 351f524bf27SDan Williams return preamble_index(ndd, ndd->ns_next, nsindex, 352f524bf27SDan Williams free, nslot); 353f524bf27SDan Williams } 354f524bf27SDan Williams 355355d8388SDan Williams static bool slot_valid(struct nvdimm_drvdata *ndd, 356355d8388SDan Williams struct nd_namespace_label *nd_label, u32 slot) 3574a826c83SDan Williams { 3584a826c83SDan Williams /* check that we are written where we expect to be written */ 3594a826c83SDan Williams if (slot != __le32_to_cpu(nd_label->slot)) 3604a826c83SDan Williams return false; 3614a826c83SDan Williams 3624a826c83SDan Williams /* check that DPA allocations are page aligned */ 3634a826c83SDan Williams if ((__le64_to_cpu(nd_label->dpa) 3644a826c83SDan Williams | __le64_to_cpu(nd_label->rawsize)) % SZ_4K) 3654a826c83SDan Williams return false; 3664a826c83SDan Williams 367355d8388SDan Williams /* check checksum */ 368355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 369355d8388SDan Williams u64 sum, sum_save; 370355d8388SDan Williams 371355d8388SDan Williams sum_save = __le64_to_cpu(nd_label->checksum); 372355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 373355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 374355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum_save); 375355d8388SDan Williams if (sum != sum_save) { 376426824d6SDan Williams dev_dbg(ndd->dev, "fail checksum. slot: %d expect: %#llx\n", 377426824d6SDan Williams slot, sum); 378355d8388SDan Williams return false; 379355d8388SDan Williams } 380355d8388SDan Williams } 381355d8388SDan Williams 3824a826c83SDan Williams return true; 3834a826c83SDan Williams } 3844a826c83SDan Williams 3854a826c83SDan Williams int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) 3864a826c83SDan Williams { 3874a826c83SDan Williams struct nd_namespace_index *nsindex; 3884a826c83SDan Williams unsigned long *free; 3894a826c83SDan Williams u32 nslot, slot; 3904a826c83SDan Williams 3914a826c83SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 3924a826c83SDan Williams return 0; /* no label, nothing to reserve */ 3934a826c83SDan Williams 3944a826c83SDan Williams for_each_clear_bit_le(slot, free, nslot) { 3954a826c83SDan Williams struct nd_namespace_label *nd_label; 3964a826c83SDan Williams struct nd_region *nd_region = NULL; 3974a826c83SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 3984a826c83SDan Williams struct nd_label_id label_id; 3994a826c83SDan Williams struct resource *res; 4004a826c83SDan Williams u32 flags; 4014a826c83SDan Williams 402564e871aSDan Williams nd_label = to_label(ndd, slot); 4034a826c83SDan Williams 404355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 4054a826c83SDan Williams continue; 4064a826c83SDan Williams 4074a826c83SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 4084a826c83SDan Williams flags = __le32_to_cpu(nd_label->flags); 4094a826c83SDan Williams nd_label_gen_id(&label_id, label_uuid, flags); 4104a826c83SDan Williams res = nvdimm_allocate_dpa(ndd, &label_id, 4114a826c83SDan Williams __le64_to_cpu(nd_label->dpa), 4124a826c83SDan Williams __le64_to_cpu(nd_label->rawsize)); 4134a826c83SDan Williams nd_dbg_dpa(nd_region, ndd, res, "reserve\n"); 4144a826c83SDan Williams if (!res) 4154a826c83SDan Williams return -EBUSY; 4164a826c83SDan Williams } 4174a826c83SDan Williams 4184a826c83SDan Williams return 0; 4194a826c83SDan Williams } 420bf9bccc1SDan Williams 4212d657d17SAlexander Duyck int nd_label_data_init(struct nvdimm_drvdata *ndd) 4222d657d17SAlexander Duyck { 4237d47aad4SAlexander Duyck size_t config_size, read_size, max_xfer, offset; 4247d47aad4SAlexander Duyck struct nd_namespace_index *nsindex; 4257d47aad4SAlexander Duyck unsigned int i; 4262d657d17SAlexander Duyck int rc = 0; 42797052c1cSDan Williams u32 nslot; 4282d657d17SAlexander Duyck 4292d657d17SAlexander Duyck if (ndd->data) 4302d657d17SAlexander Duyck return 0; 4312d657d17SAlexander Duyck 4322d657d17SAlexander Duyck if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0) { 4332d657d17SAlexander Duyck dev_dbg(ndd->dev, "failed to init config data area: (%u:%u)\n", 4342d657d17SAlexander Duyck ndd->nsarea.max_xfer, ndd->nsarea.config_size); 4352d657d17SAlexander Duyck return -ENXIO; 4362d657d17SAlexander Duyck } 4372d657d17SAlexander Duyck 4382d657d17SAlexander Duyck /* 4392d657d17SAlexander Duyck * We need to determine the maximum index area as this is the section 4402d657d17SAlexander Duyck * we must read and validate before we can start processing labels. 4412d657d17SAlexander Duyck * 4422d657d17SAlexander Duyck * If the area is too small to contain the two indexes and 2 labels 4432d657d17SAlexander Duyck * then we abort. 4442d657d17SAlexander Duyck * 4452d657d17SAlexander Duyck * Start at a label size of 128 as this should result in the largest 4462d657d17SAlexander Duyck * possible namespace index size. 4472d657d17SAlexander Duyck */ 4482d657d17SAlexander Duyck ndd->nslabel_size = 128; 4492d657d17SAlexander Duyck read_size = sizeof_namespace_index(ndd) * 2; 4502d657d17SAlexander Duyck if (!read_size) 4512d657d17SAlexander Duyck return -ENXIO; 4522d657d17SAlexander Duyck 4532d657d17SAlexander Duyck /* Allocate config data */ 4542d657d17SAlexander Duyck config_size = ndd->nsarea.config_size; 4552d657d17SAlexander Duyck ndd->data = kvzalloc(config_size, GFP_KERNEL); 4562d657d17SAlexander Duyck if (!ndd->data) 4572d657d17SAlexander Duyck return -ENOMEM; 4582d657d17SAlexander Duyck 4597d47aad4SAlexander Duyck /* 4607d47aad4SAlexander Duyck * We want to guarantee as few reads as possible while conserving 4617d47aad4SAlexander Duyck * memory. To do that we figure out how much unused space will be left 4627d47aad4SAlexander Duyck * in the last read, divide that by the total number of reads it is 4637d47aad4SAlexander Duyck * going to take given our maximum transfer size, and then reduce our 4647d47aad4SAlexander Duyck * maximum transfer size based on that result. 4657d47aad4SAlexander Duyck */ 4667d47aad4SAlexander Duyck max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); 4677d47aad4SAlexander Duyck if (read_size < max_xfer) { 4687d47aad4SAlexander Duyck /* trim waste */ 4697d47aad4SAlexander Duyck max_xfer -= ((max_xfer - 1) - (config_size - 1) % max_xfer) / 4707d47aad4SAlexander Duyck DIV_ROUND_UP(config_size, max_xfer); 4717d47aad4SAlexander Duyck /* make certain we read indexes in exactly 1 read */ 4727d47aad4SAlexander Duyck if (max_xfer < read_size) 4737d47aad4SAlexander Duyck max_xfer = read_size; 4747d47aad4SAlexander Duyck } 4757d47aad4SAlexander Duyck 4767d47aad4SAlexander Duyck /* Make our initial read size a multiple of max_xfer size */ 4777d47aad4SAlexander Duyck read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, 4787d47aad4SAlexander Duyck config_size); 4797d47aad4SAlexander Duyck 4807d47aad4SAlexander Duyck /* Read the index data */ 4817d47aad4SAlexander Duyck rc = nvdimm_get_config_data(ndd, ndd->data, 0, read_size); 4827d47aad4SAlexander Duyck if (rc) 4837d47aad4SAlexander Duyck goto out_err; 4847d47aad4SAlexander Duyck 4857d47aad4SAlexander Duyck /* Validate index data, if not valid assume all labels are invalid */ 4867d47aad4SAlexander Duyck ndd->ns_current = nd_label_validate(ndd); 4877d47aad4SAlexander Duyck if (ndd->ns_current < 0) 4887d47aad4SAlexander Duyck return 0; 4897d47aad4SAlexander Duyck 4907d47aad4SAlexander Duyck /* Record our index values */ 4917d47aad4SAlexander Duyck ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); 4927d47aad4SAlexander Duyck 4937d47aad4SAlexander Duyck /* Copy "current" index on top of the "next" index */ 4947d47aad4SAlexander Duyck nsindex = to_current_namespace_index(ndd); 4957d47aad4SAlexander Duyck nd_label_copy(ndd, to_next_namespace_index(ndd), nsindex); 4967d47aad4SAlexander Duyck 4977d47aad4SAlexander Duyck /* Determine starting offset for label data */ 4987d47aad4SAlexander Duyck offset = __le64_to_cpu(nsindex->labeloff); 49997052c1cSDan Williams nslot = __le32_to_cpu(nsindex->nslot); 5007d47aad4SAlexander Duyck 5017d47aad4SAlexander Duyck /* Loop through the free list pulling in any active labels */ 50297052c1cSDan Williams for (i = 0; i < nslot; i++, offset += ndd->nslabel_size) { 5037d47aad4SAlexander Duyck size_t label_read_size; 5047d47aad4SAlexander Duyck 5057d47aad4SAlexander Duyck /* zero out the unused labels */ 5067d47aad4SAlexander Duyck if (test_bit_le(i, nsindex->free)) { 5077d47aad4SAlexander Duyck memset(ndd->data + offset, 0, ndd->nslabel_size); 5087d47aad4SAlexander Duyck continue; 5097d47aad4SAlexander Duyck } 5107d47aad4SAlexander Duyck 5117d47aad4SAlexander Duyck /* if we already read past here then just continue */ 5127d47aad4SAlexander Duyck if (offset + ndd->nslabel_size <= read_size) 5137d47aad4SAlexander Duyck continue; 5147d47aad4SAlexander Duyck 5157d47aad4SAlexander Duyck /* if we haven't read in a while reset our read_size offset */ 5167d47aad4SAlexander Duyck if (read_size < offset) 5177d47aad4SAlexander Duyck read_size = offset; 5187d47aad4SAlexander Duyck 5197d47aad4SAlexander Duyck /* determine how much more will be read after this next call. */ 5207d47aad4SAlexander Duyck label_read_size = offset + ndd->nslabel_size - read_size; 5217d47aad4SAlexander Duyck label_read_size = DIV_ROUND_UP(label_read_size, max_xfer) * 5227d47aad4SAlexander Duyck max_xfer; 5237d47aad4SAlexander Duyck 5247d47aad4SAlexander Duyck /* truncate last read if needed */ 5257d47aad4SAlexander Duyck if (read_size + label_read_size > config_size) 5267d47aad4SAlexander Duyck label_read_size = config_size - read_size; 5277d47aad4SAlexander Duyck 5287d47aad4SAlexander Duyck /* Read the label data */ 5297d47aad4SAlexander Duyck rc = nvdimm_get_config_data(ndd, ndd->data + read_size, 5307d47aad4SAlexander Duyck read_size, label_read_size); 5317d47aad4SAlexander Duyck if (rc) 5327d47aad4SAlexander Duyck goto out_err; 5337d47aad4SAlexander Duyck 5347d47aad4SAlexander Duyck /* push read_size to next read offset */ 5357d47aad4SAlexander Duyck read_size += label_read_size; 5367d47aad4SAlexander Duyck } 5377d47aad4SAlexander Duyck 5387d47aad4SAlexander Duyck dev_dbg(ndd->dev, "len: %zu rc: %d\n", offset, rc); 5397d47aad4SAlexander Duyck out_err: 5407d47aad4SAlexander Duyck return rc; 5412d657d17SAlexander Duyck } 5422d657d17SAlexander Duyck 543bf9bccc1SDan Williams int nd_label_active_count(struct nvdimm_drvdata *ndd) 544bf9bccc1SDan Williams { 545bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 546bf9bccc1SDan Williams unsigned long *free; 547bf9bccc1SDan Williams u32 nslot, slot; 548bf9bccc1SDan Williams int count = 0; 549bf9bccc1SDan Williams 550bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 551bf9bccc1SDan Williams return 0; 552bf9bccc1SDan Williams 553bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 554bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 555bf9bccc1SDan Williams 556564e871aSDan Williams nd_label = to_label(ndd, slot); 557bf9bccc1SDan Williams 558355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) { 559bf9bccc1SDan Williams u32 label_slot = __le32_to_cpu(nd_label->slot); 560bf9bccc1SDan Williams u64 size = __le64_to_cpu(nd_label->rawsize); 561bf9bccc1SDan Williams u64 dpa = __le64_to_cpu(nd_label->dpa); 562bf9bccc1SDan Williams 563bf9bccc1SDan Williams dev_dbg(ndd->dev, 564426824d6SDan Williams "slot%d invalid slot: %d dpa: %llx size: %llx\n", 565426824d6SDan Williams slot, label_slot, dpa, size); 566bf9bccc1SDan Williams continue; 567bf9bccc1SDan Williams } 568bf9bccc1SDan Williams count++; 569bf9bccc1SDan Williams } 570bf9bccc1SDan Williams return count; 571bf9bccc1SDan Williams } 572bf9bccc1SDan Williams 573bf9bccc1SDan Williams struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n) 574bf9bccc1SDan Williams { 575bf9bccc1SDan Williams struct nd_namespace_index *nsindex; 576bf9bccc1SDan Williams unsigned long *free; 577bf9bccc1SDan Williams u32 nslot, slot; 578bf9bccc1SDan Williams 579bf9bccc1SDan Williams if (!preamble_current(ndd, &nsindex, &free, &nslot)) 580bf9bccc1SDan Williams return NULL; 581bf9bccc1SDan Williams 582bf9bccc1SDan Williams for_each_clear_bit_le(slot, free, nslot) { 583bf9bccc1SDan Williams struct nd_namespace_label *nd_label; 584bf9bccc1SDan Williams 585564e871aSDan Williams nd_label = to_label(ndd, slot); 586355d8388SDan Williams if (!slot_valid(ndd, nd_label, slot)) 587bf9bccc1SDan Williams continue; 588bf9bccc1SDan Williams 589bf9bccc1SDan Williams if (n-- == 0) 590564e871aSDan Williams return to_label(ndd, slot); 591bf9bccc1SDan Williams } 592bf9bccc1SDan Williams 593bf9bccc1SDan Williams return NULL; 594bf9bccc1SDan Williams } 595f524bf27SDan Williams 5960ba1c634SDan Williams u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd) 597f524bf27SDan Williams { 598f524bf27SDan Williams struct nd_namespace_index *nsindex; 599f524bf27SDan Williams unsigned long *free; 600f524bf27SDan Williams u32 nslot, slot; 601f524bf27SDan Williams 602f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 603f524bf27SDan Williams return UINT_MAX; 604f524bf27SDan Williams 605f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 606f524bf27SDan Williams 607f524bf27SDan Williams slot = find_next_bit_le(free, nslot, 0); 608f524bf27SDan Williams if (slot == nslot) 609f524bf27SDan Williams return UINT_MAX; 610f524bf27SDan Williams 611f524bf27SDan Williams clear_bit_le(slot, free); 612f524bf27SDan Williams 613f524bf27SDan Williams return slot; 614f524bf27SDan Williams } 615f524bf27SDan Williams 6160ba1c634SDan Williams bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot) 617f524bf27SDan Williams { 618f524bf27SDan Williams struct nd_namespace_index *nsindex; 619f524bf27SDan Williams unsigned long *free; 620f524bf27SDan Williams u32 nslot; 621f524bf27SDan Williams 622f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 623f524bf27SDan Williams return false; 624f524bf27SDan Williams 625f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 626f524bf27SDan Williams 627f524bf27SDan Williams if (slot < nslot) 628f524bf27SDan Williams return !test_and_set_bit_le(slot, free); 629f524bf27SDan Williams return false; 630f524bf27SDan Williams } 631f524bf27SDan Williams 632f524bf27SDan Williams u32 nd_label_nfree(struct nvdimm_drvdata *ndd) 633f524bf27SDan Williams { 634f524bf27SDan Williams struct nd_namespace_index *nsindex; 635f524bf27SDan Williams unsigned long *free; 636f524bf27SDan Williams u32 nslot; 637f524bf27SDan Williams 638f524bf27SDan Williams WARN_ON(!is_nvdimm_bus_locked(ndd->dev)); 639f524bf27SDan Williams 640f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 6410ba1c634SDan Williams return nvdimm_num_label_slots(ndd); 642f524bf27SDan Williams 643f524bf27SDan Williams return bitmap_weight(free, nslot); 644f524bf27SDan Williams } 645f524bf27SDan Williams 646f524bf27SDan Williams static int nd_label_write_index(struct nvdimm_drvdata *ndd, int index, u32 seq, 647f524bf27SDan Williams unsigned long flags) 648f524bf27SDan Williams { 649f524bf27SDan Williams struct nd_namespace_index *nsindex; 650f524bf27SDan Williams unsigned long offset; 651f524bf27SDan Williams u64 checksum; 652f524bf27SDan Williams u32 nslot; 653f524bf27SDan Williams int rc; 654f524bf27SDan Williams 655f524bf27SDan Williams nsindex = to_namespace_index(ndd, index); 656f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 657f524bf27SDan Williams nslot = nvdimm_num_label_slots(ndd); 658f524bf27SDan Williams else 659f524bf27SDan Williams nslot = __le32_to_cpu(nsindex->nslot); 660f524bf27SDan Williams 661f524bf27SDan Williams memcpy(nsindex->sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN); 662564e871aSDan Williams memset(&nsindex->flags, 0, 3); 663564e871aSDan Williams nsindex->labelsize = sizeof_namespace_label(ndd) >> 8; 664f524bf27SDan Williams nsindex->seq = __cpu_to_le32(seq); 665f524bf27SDan Williams offset = (unsigned long) nsindex 666f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 667f524bf27SDan Williams nsindex->myoff = __cpu_to_le64(offset); 668f524bf27SDan Williams nsindex->mysize = __cpu_to_le64(sizeof_namespace_index(ndd)); 669f524bf27SDan Williams offset = (unsigned long) to_namespace_index(ndd, 670f524bf27SDan Williams nd_label_next_nsindex(index)) 671f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 672f524bf27SDan Williams nsindex->otheroff = __cpu_to_le64(offset); 673f524bf27SDan Williams offset = (unsigned long) nd_label_base(ndd) 674f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 675f524bf27SDan Williams nsindex->labeloff = __cpu_to_le64(offset); 676f524bf27SDan Williams nsindex->nslot = __cpu_to_le32(nslot); 677f524bf27SDan Williams nsindex->major = __cpu_to_le16(1); 6788990cdf1SDan Williams if (sizeof_namespace_label(ndd) < 256) 679f524bf27SDan Williams nsindex->minor = __cpu_to_le16(1); 6808990cdf1SDan Williams else 6818990cdf1SDan Williams nsindex->minor = __cpu_to_le16(2); 682f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(0); 683f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) { 684f524bf27SDan Williams unsigned long *free = (unsigned long *) nsindex->free; 685f524bf27SDan Williams u32 nfree = ALIGN(nslot, BITS_PER_LONG); 686f524bf27SDan Williams int last_bits, i; 687f524bf27SDan Williams 688f524bf27SDan Williams memset(nsindex->free, 0xff, nfree / 8); 689f524bf27SDan Williams for (i = 0, last_bits = nfree - nslot; i < last_bits; i++) 690f524bf27SDan Williams clear_bit_le(nslot + i, free); 691f524bf27SDan Williams } 692f524bf27SDan Williams checksum = nd_fletcher64(nsindex, sizeof_namespace_index(ndd), 1); 693f524bf27SDan Williams nsindex->checksum = __cpu_to_le64(checksum); 694f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, __le64_to_cpu(nsindex->myoff), 695f524bf27SDan Williams nsindex, sizeof_namespace_index(ndd)); 696f524bf27SDan Williams if (rc < 0) 697f524bf27SDan Williams return rc; 698f524bf27SDan Williams 699f524bf27SDan Williams if (flags & ND_NSINDEX_INIT) 700f524bf27SDan Williams return 0; 701f524bf27SDan Williams 702f524bf27SDan Williams /* copy the index we just wrote to the new 'next' */ 703f524bf27SDan Williams WARN_ON(index != ndd->ns_next); 704f524bf27SDan Williams nd_label_copy(ndd, to_current_namespace_index(ndd), nsindex); 705f524bf27SDan Williams ndd->ns_current = nd_label_next_nsindex(ndd->ns_current); 706f524bf27SDan Williams ndd->ns_next = nd_label_next_nsindex(ndd->ns_next); 707f524bf27SDan Williams WARN_ON(ndd->ns_current == ndd->ns_next); 708f524bf27SDan Williams 709f524bf27SDan Williams return 0; 710f524bf27SDan Williams } 711f524bf27SDan Williams 712f524bf27SDan Williams static unsigned long nd_label_offset(struct nvdimm_drvdata *ndd, 713f524bf27SDan Williams struct nd_namespace_label *nd_label) 714f524bf27SDan Williams { 715f524bf27SDan Williams return (unsigned long) nd_label 716f524bf27SDan Williams - (unsigned long) to_namespace_index(ndd, 0); 717f524bf27SDan Williams } 718f524bf27SDan Williams 719b3fde74eSDan Williams enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid) 720b3fde74eSDan Williams { 721b3fde74eSDan Williams if (guid_equal(guid, &nvdimm_btt_guid)) 722b3fde74eSDan Williams return NVDIMM_CCLASS_BTT; 72314e49454SVishal Verma else if (guid_equal(guid, &nvdimm_btt2_guid)) 72414e49454SVishal Verma return NVDIMM_CCLASS_BTT2; 725b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_pfn_guid)) 726b3fde74eSDan Williams return NVDIMM_CCLASS_PFN; 727b3fde74eSDan Williams else if (guid_equal(guid, &nvdimm_dax_guid)) 728b3fde74eSDan Williams return NVDIMM_CCLASS_DAX; 729b3fde74eSDan Williams else if (guid_equal(guid, &guid_null)) 730b3fde74eSDan Williams return NVDIMM_CCLASS_NONE; 731b3fde74eSDan Williams 732b3fde74eSDan Williams return NVDIMM_CCLASS_UNKNOWN; 733b3fde74eSDan Williams } 734b3fde74eSDan Williams 735b3fde74eSDan Williams static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, 736b3fde74eSDan Williams guid_t *target) 737b3fde74eSDan Williams { 738b3fde74eSDan Williams if (claim_class == NVDIMM_CCLASS_BTT) 739b3fde74eSDan Williams return &nvdimm_btt_guid; 74014e49454SVishal Verma else if (claim_class == NVDIMM_CCLASS_BTT2) 74114e49454SVishal Verma return &nvdimm_btt2_guid; 742b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_PFN) 743b3fde74eSDan Williams return &nvdimm_pfn_guid; 744b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_DAX) 745b3fde74eSDan Williams return &nvdimm_dax_guid; 746b3fde74eSDan Williams else if (claim_class == NVDIMM_CCLASS_UNKNOWN) { 747b3fde74eSDan Williams /* 748b3fde74eSDan Williams * If we're modifying a namespace for which we don't 749b3fde74eSDan Williams * know the claim_class, don't touch the existing guid. 750b3fde74eSDan Williams */ 751b3fde74eSDan Williams return target; 752b3fde74eSDan Williams } else 753b3fde74eSDan Williams return &guid_null; 754b3fde74eSDan Williams } 755b3fde74eSDan Williams 756f524bf27SDan Williams static int __pmem_label_update(struct nd_region *nd_region, 757f524bf27SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, 758*966d23a0SDan Williams int pos, unsigned long flags) 759f524bf27SDan Williams { 760b3fde74eSDan Williams struct nd_namespace_common *ndns = &nspm->nsio.common; 761faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 762f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 76316660eaeSDan Williams struct nd_label_ent *label_ent, *victim = NULL; 764f524bf27SDan Williams struct nd_namespace_label *nd_label; 765f524bf27SDan Williams struct nd_namespace_index *nsindex; 76616660eaeSDan Williams struct nd_label_id label_id; 76716660eaeSDan Williams struct resource *res; 768f524bf27SDan Williams unsigned long *free; 769f524bf27SDan Williams u32 nslot, slot; 770f524bf27SDan Williams size_t offset; 771c12c48ceSDan Williams u64 cookie; 772f524bf27SDan Williams int rc; 773f524bf27SDan Williams 774f524bf27SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 775f524bf27SDan Williams return -ENXIO; 776f524bf27SDan Williams 777c12c48ceSDan Williams cookie = nd_region_interleave_set_cookie(nd_region, nsindex); 77816660eaeSDan Williams nd_label_gen_id(&label_id, nspm->uuid, 0); 77916660eaeSDan Williams for_each_dpa_resource(ndd, res) 78016660eaeSDan Williams if (strcmp(res->name, label_id.id) == 0) 78116660eaeSDan Williams break; 78216660eaeSDan Williams 78316660eaeSDan Williams if (!res) { 78416660eaeSDan Williams WARN_ON_ONCE(1); 78516660eaeSDan Williams return -ENXIO; 78616660eaeSDan Williams } 78716660eaeSDan Williams 788f524bf27SDan Williams /* allocate and write the label to the staging (next) index */ 789f524bf27SDan Williams slot = nd_label_alloc_slot(ndd); 790f524bf27SDan Williams if (slot == UINT_MAX) 791f524bf27SDan Williams return -ENXIO; 792426824d6SDan Williams dev_dbg(ndd->dev, "allocated: %d\n", slot); 793f524bf27SDan Williams 794564e871aSDan Williams nd_label = to_label(ndd, slot); 795564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 796f524bf27SDan Williams memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN); 797f524bf27SDan Williams if (nspm->alt_name) 798f524bf27SDan Williams memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN); 799*966d23a0SDan Williams nd_label->flags = __cpu_to_le32(flags); 800f524bf27SDan Williams nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings); 801f524bf27SDan Williams nd_label->position = __cpu_to_le16(pos); 802f524bf27SDan Williams nd_label->isetcookie = __cpu_to_le64(cookie); 80316660eaeSDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 8042de5148fSDan Williams nd_label->lbasize = __cpu_to_le64(nspm->lbasize); 80516660eaeSDan Williams nd_label->dpa = __cpu_to_le64(res->start); 806f524bf27SDan Williams nd_label->slot = __cpu_to_le32(slot); 807faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 808faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 809b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 810b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 811b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 812b3fde74eSDan Williams &nd_label->abstraction_guid)); 813355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 814355d8388SDan Williams u64 sum; 815355d8388SDan Williams 816355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 817355d8388SDan Williams sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); 818355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 819355d8388SDan Williams } 820426824d6SDan Williams nd_dbg_dpa(nd_region, ndd, res, "\n"); 821f524bf27SDan Williams 822f524bf27SDan Williams /* update label */ 823f524bf27SDan Williams offset = nd_label_offset(ndd, nd_label); 824f524bf27SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 825564e871aSDan Williams sizeof_namespace_label(ndd)); 826f524bf27SDan Williams if (rc < 0) 827f524bf27SDan Williams return rc; 828f524bf27SDan Williams 829f524bf27SDan Williams /* Garbage collect the previous label */ 830ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 83116660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) { 83216660eaeSDan Williams if (!label_ent->label) 83316660eaeSDan Williams continue; 83416660eaeSDan Williams if (memcmp(nspm->uuid, label_ent->label->uuid, 83516660eaeSDan Williams NSLABEL_UUID_LEN) != 0) 83616660eaeSDan Williams continue; 83716660eaeSDan Williams victim = label_ent; 83816660eaeSDan Williams list_move_tail(&victim->list, &nd_mapping->labels); 83916660eaeSDan Williams break; 84016660eaeSDan Williams } 84116660eaeSDan Williams if (victim) { 842426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 84316660eaeSDan Williams slot = to_slot(ndd, victim->label); 84416660eaeSDan Williams nd_label_free_slot(ndd, slot); 84516660eaeSDan Williams victim->label = NULL; 846f524bf27SDan Williams } 847f524bf27SDan Williams 848f524bf27SDan Williams /* update index */ 849f524bf27SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 850f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 85116660eaeSDan Williams if (rc == 0) { 85216660eaeSDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 85316660eaeSDan Williams if (!label_ent->label) { 854ae8219f1SDan Williams label_ent->label = nd_label; 85516660eaeSDan Williams nd_label = NULL; 85616660eaeSDan Williams break; 85716660eaeSDan Williams } 85816660eaeSDan Williams dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label, 85916660eaeSDan Williams "failed to track label: %d\n", 86016660eaeSDan Williams to_slot(ndd, nd_label)); 86116660eaeSDan Williams if (nd_label) 86216660eaeSDan Williams rc = -ENXIO; 86316660eaeSDan Williams } 864ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 865ae8219f1SDan Williams 866f524bf27SDan Williams return rc; 8670ba1c634SDan Williams } 8680ba1c634SDan Williams 8690ba1c634SDan Williams static bool is_old_resource(struct resource *res, struct resource **list, int n) 870f524bf27SDan Williams { 871f524bf27SDan Williams int i; 8720ba1c634SDan Williams 8730ba1c634SDan Williams if (res->flags & DPA_RESOURCE_ADJUSTED) 8740ba1c634SDan Williams return false; 8750ba1c634SDan Williams for (i = 0; i < n; i++) 8760ba1c634SDan Williams if (res == list[i]) 8770ba1c634SDan Williams return true; 8780ba1c634SDan Williams return false; 8790ba1c634SDan Williams } 8800ba1c634SDan Williams 8810ba1c634SDan Williams static struct resource *to_resource(struct nvdimm_drvdata *ndd, 8820ba1c634SDan Williams struct nd_namespace_label *nd_label) 8830ba1c634SDan Williams { 8840ba1c634SDan Williams struct resource *res; 8850ba1c634SDan Williams 8860ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 8870ba1c634SDan Williams if (res->start != __le64_to_cpu(nd_label->dpa)) 8880ba1c634SDan Williams continue; 8890ba1c634SDan Williams if (resource_size(res) != __le64_to_cpu(nd_label->rawsize)) 8900ba1c634SDan Williams continue; 8910ba1c634SDan Williams return res; 8920ba1c634SDan Williams } 8930ba1c634SDan Williams 8940ba1c634SDan Williams return NULL; 8950ba1c634SDan Williams } 8960ba1c634SDan Williams 8970ba1c634SDan Williams /* 8980ba1c634SDan Williams * 1/ Account all the labels that can be freed after this update 8990ba1c634SDan Williams * 2/ Allocate and write the label to the staging (next) index 9000ba1c634SDan Williams * 3/ Record the resources in the namespace device 9010ba1c634SDan Williams */ 9020ba1c634SDan Williams static int __blk_label_update(struct nd_region *nd_region, 9030ba1c634SDan Williams struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, 9040ba1c634SDan Williams int num_labels) 9050ba1c634SDan Williams { 906ae8219f1SDan Williams int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; 907faec6f8aSDan Williams struct nd_interleave_set *nd_set = nd_region->nd_set; 908b3fde74eSDan Williams struct nd_namespace_common *ndns = &nsblk->common; 909f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 9100ba1c634SDan Williams struct nd_namespace_label *nd_label; 911ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 9120ba1c634SDan Williams struct nd_namespace_index *nsindex; 9130ba1c634SDan Williams unsigned long *free, *victim_map = NULL; 9140ba1c634SDan Williams struct resource *res, **old_res_list; 9150ba1c634SDan Williams struct nd_label_id label_id; 9160ba1c634SDan Williams u8 uuid[NSLABEL_UUID_LEN]; 9173934d841SDan Williams int min_dpa_idx = 0; 918ae8219f1SDan Williams LIST_HEAD(list); 9190ba1c634SDan Williams u32 nslot, slot; 920f524bf27SDan Williams 9210ba1c634SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 9220ba1c634SDan Williams return -ENXIO; 923f524bf27SDan Williams 9240ba1c634SDan Williams old_res_list = nsblk->res; 9250ba1c634SDan Williams nfree = nd_label_nfree(ndd); 9260ba1c634SDan Williams old_num_resources = nsblk->num_resources; 9270ba1c634SDan Williams nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); 9280ba1c634SDan Williams 9290ba1c634SDan Williams /* 9300ba1c634SDan Williams * We need to loop over the old resources a few times, which seems a 9310ba1c634SDan Williams * bit inefficient, but we need to know that we have the label 9320ba1c634SDan Williams * space before we start mutating the tracking structures. 9330ba1c634SDan Williams * Otherwise the recovery method of last resort for userspace is 9340ba1c634SDan Williams * disable and re-enable the parent region. 9350ba1c634SDan Williams */ 9360ba1c634SDan Williams alloc = 0; 9370ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 9380ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 9390ba1c634SDan Williams continue; 9400ba1c634SDan Williams if (!is_old_resource(res, old_res_list, old_num_resources)) 9410ba1c634SDan Williams alloc++; 9420ba1c634SDan Williams } 9430ba1c634SDan Williams 9440ba1c634SDan Williams victims = 0; 9450ba1c634SDan Williams if (old_num_resources) { 9460ba1c634SDan Williams /* convert old local-label-map to dimm-slot victim-map */ 9479065ed12SAndy Shevchenko victim_map = bitmap_zalloc(nslot, GFP_KERNEL); 9480ba1c634SDan Williams if (!victim_map) 9490ba1c634SDan Williams return -ENOMEM; 9500ba1c634SDan Williams 9510ba1c634SDan Williams /* mark unused labels for garbage collection */ 9520ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 953564e871aSDan Williams nd_label = to_label(ndd, slot); 9540ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 9550ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 9560ba1c634SDan Williams continue; 9570ba1c634SDan Williams res = to_resource(ndd, nd_label); 9580ba1c634SDan Williams if (res && is_old_resource(res, old_res_list, 9590ba1c634SDan Williams old_num_resources)) 9600ba1c634SDan Williams continue; 9610ba1c634SDan Williams slot = to_slot(ndd, nd_label); 9620ba1c634SDan Williams set_bit(slot, victim_map); 9630ba1c634SDan Williams victims++; 9640ba1c634SDan Williams } 9650ba1c634SDan Williams } 9660ba1c634SDan Williams 9670ba1c634SDan Williams /* don't allow updates that consume the last label */ 9680ba1c634SDan Williams if (nfree - alloc < 0 || nfree - alloc + victims < 1) { 9698c2f7e86SDan Williams dev_info(&nsblk->common.dev, "insufficient label space\n"); 9709065ed12SAndy Shevchenko bitmap_free(victim_map); 9710ba1c634SDan Williams return -ENOSPC; 9720ba1c634SDan Williams } 9730ba1c634SDan Williams /* from here on we need to abort on error */ 9740ba1c634SDan Williams 9750ba1c634SDan Williams 9760ba1c634SDan Williams /* assign all resources to the namespace before writing the labels */ 9770ba1c634SDan Williams nsblk->res = NULL; 9780ba1c634SDan Williams nsblk->num_resources = 0; 9790ba1c634SDan Williams for_each_dpa_resource(ndd, res) { 9800ba1c634SDan Williams if (strcmp(res->name, label_id.id) != 0) 9810ba1c634SDan Williams continue; 9820ba1c634SDan Williams if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { 9830ba1c634SDan Williams rc = -ENOMEM; 9840ba1c634SDan Williams goto abort; 9850ba1c634SDan Williams } 9860ba1c634SDan Williams } 9870ba1c634SDan Williams 9883934d841SDan Williams /* 9893934d841SDan Williams * Find the resource associated with the first label in the set 9903934d841SDan Williams * per the v1.2 namespace specification. 9913934d841SDan Williams */ 9923934d841SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 9933934d841SDan Williams struct resource *min = nsblk->res[min_dpa_idx]; 9943934d841SDan Williams 9953934d841SDan Williams res = nsblk->res[i]; 9963934d841SDan Williams if (res->start < min->start) 9973934d841SDan Williams min_dpa_idx = i; 9983934d841SDan Williams } 9993934d841SDan Williams 10000ba1c634SDan Williams for (i = 0; i < nsblk->num_resources; i++) { 10010ba1c634SDan Williams size_t offset; 10020ba1c634SDan Williams 10030ba1c634SDan Williams res = nsblk->res[i]; 10040ba1c634SDan Williams if (is_old_resource(res, old_res_list, old_num_resources)) 10050ba1c634SDan Williams continue; /* carry-over */ 10060ba1c634SDan Williams slot = nd_label_alloc_slot(ndd); 10070ba1c634SDan Williams if (slot == UINT_MAX) 10080ba1c634SDan Williams goto abort; 1009426824d6SDan Williams dev_dbg(ndd->dev, "allocated: %d\n", slot); 10100ba1c634SDan Williams 1011564e871aSDan Williams nd_label = to_label(ndd, slot); 1012564e871aSDan Williams memset(nd_label, 0, sizeof_namespace_label(ndd)); 10130ba1c634SDan Williams memcpy(nd_label->uuid, nsblk->uuid, NSLABEL_UUID_LEN); 10140ba1c634SDan Williams if (nsblk->alt_name) 10150ba1c634SDan Williams memcpy(nd_label->name, nsblk->alt_name, 10160ba1c634SDan Williams NSLABEL_NAME_LEN); 10170ba1c634SDan Williams nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); 10188f2bc243SDan Williams 10198f2bc243SDan Williams /* 10208f2bc243SDan Williams * Use the presence of the type_guid as a flag to 10213934d841SDan Williams * determine isetcookie usage and nlabel + position 10223934d841SDan Williams * policy for blk-aperture namespaces. 10238f2bc243SDan Williams */ 10243934d841SDan Williams if (namespace_label_has(ndd, type_guid)) { 10253934d841SDan Williams if (i == min_dpa_idx) { 10263934d841SDan Williams nd_label->nlabel = __cpu_to_le16(nsblk->num_resources); 10273934d841SDan Williams nd_label->position = __cpu_to_le16(0); 10283934d841SDan Williams } else { 10293934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0xffff); 10303934d841SDan Williams nd_label->position = __cpu_to_le16(0xffff); 10313934d841SDan Williams } 10328f2bc243SDan Williams nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); 10333934d841SDan Williams } else { 10343934d841SDan Williams nd_label->nlabel = __cpu_to_le16(0); /* N/A */ 10353934d841SDan Williams nd_label->position = __cpu_to_le16(0); /* N/A */ 10360ba1c634SDan Williams nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ 10373934d841SDan Williams } 10388f2bc243SDan Williams 10390ba1c634SDan Williams nd_label->dpa = __cpu_to_le64(res->start); 10400ba1c634SDan Williams nd_label->rawsize = __cpu_to_le64(resource_size(res)); 10410ba1c634SDan Williams nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); 10420ba1c634SDan Williams nd_label->slot = __cpu_to_le32(slot); 1043faec6f8aSDan Williams if (namespace_label_has(ndd, type_guid)) 1044faec6f8aSDan Williams guid_copy(&nd_label->type_guid, &nd_set->type_guid); 1045b3fde74eSDan Williams if (namespace_label_has(ndd, abstraction_guid)) 1046b3fde74eSDan Williams guid_copy(&nd_label->abstraction_guid, 1047b3fde74eSDan Williams to_abstraction_guid(ndns->claim_class, 1048b3fde74eSDan Williams &nd_label->abstraction_guid)); 1049b3fde74eSDan Williams 1050355d8388SDan Williams if (namespace_label_has(ndd, checksum)) { 1051355d8388SDan Williams u64 sum; 1052355d8388SDan Williams 1053355d8388SDan Williams nd_label->checksum = __cpu_to_le64(0); 1054355d8388SDan Williams sum = nd_fletcher64(nd_label, 1055355d8388SDan Williams sizeof_namespace_label(ndd), 1); 1056355d8388SDan Williams nd_label->checksum = __cpu_to_le64(sum); 1057355d8388SDan Williams } 10580ba1c634SDan Williams 10590ba1c634SDan Williams /* update label */ 10600ba1c634SDan Williams offset = nd_label_offset(ndd, nd_label); 10610ba1c634SDan Williams rc = nvdimm_set_config_data(ndd, offset, nd_label, 1062564e871aSDan Williams sizeof_namespace_label(ndd)); 10630ba1c634SDan Williams if (rc < 0) 10640ba1c634SDan Williams goto abort; 10650ba1c634SDan Williams } 10660ba1c634SDan Williams 10670ba1c634SDan Williams /* free up now unused slots in the new index */ 10680ba1c634SDan Williams for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { 1069426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 10700ba1c634SDan Williams nd_label_free_slot(ndd, slot); 10710ba1c634SDan Williams } 10720ba1c634SDan Williams 10730ba1c634SDan Williams /* update index */ 10740ba1c634SDan Williams rc = nd_label_write_index(ndd, ndd->ns_next, 10750ba1c634SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 10760ba1c634SDan Williams if (rc) 10770ba1c634SDan Williams goto abort; 10780ba1c634SDan Williams 10790ba1c634SDan Williams /* 10800ba1c634SDan Williams * Now that the on-dimm labels are up to date, fix up the tracking 10810ba1c634SDan Williams * entries in nd_mapping->labels 10820ba1c634SDan Williams */ 10830ba1c634SDan Williams nlabel = 0; 1084ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1085ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 1086ae8219f1SDan Williams nd_label = label_ent->label; 1087ae8219f1SDan Williams if (!nd_label) 1088ae8219f1SDan Williams continue; 10890ba1c634SDan Williams nlabel++; 10900ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 10910ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 10920ba1c634SDan Williams continue; 10930ba1c634SDan Williams nlabel--; 1094ae8219f1SDan Williams list_move(&label_ent->list, &list); 1095ae8219f1SDan Williams label_ent->label = NULL; 10960ba1c634SDan Williams } 1097ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 1098ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1099ae8219f1SDan Williams 11000ba1c634SDan Williams if (nlabel + nsblk->num_resources > num_labels) { 11010ba1c634SDan Williams /* 11020ba1c634SDan Williams * Bug, we can't end up with more resources than 11030ba1c634SDan Williams * available labels 11040ba1c634SDan Williams */ 11050ba1c634SDan Williams WARN_ON_ONCE(1); 11060ba1c634SDan Williams rc = -ENXIO; 11070ba1c634SDan Williams goto out; 11080ba1c634SDan Williams } 11090ba1c634SDan Williams 1110ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1111ae8219f1SDan Williams label_ent = list_first_entry_or_null(&nd_mapping->labels, 1112ae8219f1SDan Williams typeof(*label_ent), list); 1113ae8219f1SDan Williams if (!label_ent) { 1114ae8219f1SDan Williams WARN_ON(1); 1115ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1116ae8219f1SDan Williams rc = -ENXIO; 1117ae8219f1SDan Williams goto out; 1118ae8219f1SDan Williams } 11190ba1c634SDan Williams for_each_clear_bit_le(slot, free, nslot) { 1120564e871aSDan Williams nd_label = to_label(ndd, slot); 11210ba1c634SDan Williams memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); 11220ba1c634SDan Williams if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) 11230ba1c634SDan Williams continue; 11240ba1c634SDan Williams res = to_resource(ndd, nd_label); 11250ba1c634SDan Williams res->flags &= ~DPA_RESOURCE_ADJUSTED; 1126ae8219f1SDan Williams dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); 1127ae8219f1SDan Williams list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { 1128ae8219f1SDan Williams if (label_ent->label) 1129ae8219f1SDan Williams continue; 1130ae8219f1SDan Williams label_ent->label = nd_label; 1131ae8219f1SDan Williams nd_label = NULL; 1132ae8219f1SDan Williams break; 11330ba1c634SDan Williams } 1134ae8219f1SDan Williams if (nd_label) 1135ae8219f1SDan Williams dev_WARN(&nsblk->common.dev, 1136ae8219f1SDan Williams "failed to track label slot%d\n", slot); 1137ae8219f1SDan Williams } 1138ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 11390ba1c634SDan Williams 11400ba1c634SDan Williams out: 11410ba1c634SDan Williams kfree(old_res_list); 11429065ed12SAndy Shevchenko bitmap_free(victim_map); 11430ba1c634SDan Williams return rc; 11440ba1c634SDan Williams 11450ba1c634SDan Williams abort: 11460ba1c634SDan Williams /* 11470ba1c634SDan Williams * 1/ repair the allocated label bitmap in the index 11480ba1c634SDan Williams * 2/ restore the resource list 11490ba1c634SDan Williams */ 11500ba1c634SDan Williams nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); 11510ba1c634SDan Williams kfree(nsblk->res); 11520ba1c634SDan Williams nsblk->res = old_res_list; 11530ba1c634SDan Williams nsblk->num_resources = old_num_resources; 11540ba1c634SDan Williams old_res_list = NULL; 11550ba1c634SDan Williams goto out; 11560ba1c634SDan Williams } 11570ba1c634SDan Williams 11580ba1c634SDan Williams static int init_labels(struct nd_mapping *nd_mapping, int num_labels) 11590ba1c634SDan Williams { 1160ae8219f1SDan Williams int i, old_num_labels = 0; 1161ae8219f1SDan Williams struct nd_label_ent *label_ent; 11620ba1c634SDan Williams struct nd_namespace_index *nsindex; 11630ba1c634SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 11640ba1c634SDan Williams 1165ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1166ae8219f1SDan Williams list_for_each_entry(label_ent, &nd_mapping->labels, list) 11670ba1c634SDan Williams old_num_labels++; 1168ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 11690ba1c634SDan Williams 11700ba1c634SDan Williams /* 11710ba1c634SDan Williams * We need to preserve all the old labels for the mapping so 11720ba1c634SDan Williams * they can be garbage collected after writing the new labels. 11730ba1c634SDan Williams */ 1174ae8219f1SDan Williams for (i = old_num_labels; i < num_labels; i++) { 1175ae8219f1SDan Williams label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); 1176ae8219f1SDan Williams if (!label_ent) 11770ba1c634SDan Williams return -ENOMEM; 1178ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1179ae8219f1SDan Williams list_add_tail(&label_ent->list, &nd_mapping->labels); 1180ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 11810ba1c634SDan Williams } 11820ba1c634SDan Williams 1183f524bf27SDan Williams if (ndd->ns_current == -1 || ndd->ns_next == -1) 1184f524bf27SDan Williams /* pass */; 1185f524bf27SDan Williams else 11860ba1c634SDan Williams return max(num_labels, old_num_labels); 1187f524bf27SDan Williams 1188f524bf27SDan Williams nsindex = to_namespace_index(ndd, 0); 1189f524bf27SDan Williams memset(nsindex, 0, ndd->nsarea.config_size); 1190f524bf27SDan Williams for (i = 0; i < 2; i++) { 1191b18d4b8aSDan Williams int rc = nd_label_write_index(ndd, i, 3 - i, ND_NSINDEX_INIT); 1192f524bf27SDan Williams 1193f524bf27SDan Williams if (rc) 1194f524bf27SDan Williams return rc; 1195f524bf27SDan Williams } 1196f524bf27SDan Williams ndd->ns_next = 1; 1197f524bf27SDan Williams ndd->ns_current = 0; 1198f524bf27SDan Williams 11990ba1c634SDan Williams return max(num_labels, old_num_labels); 1200f524bf27SDan Williams } 1201f524bf27SDan Williams 1202f524bf27SDan Williams static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) 1203f524bf27SDan Williams { 1204f524bf27SDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 1205ae8219f1SDan Williams struct nd_label_ent *label_ent, *e; 1206f524bf27SDan Williams struct nd_namespace_index *nsindex; 1207f524bf27SDan Williams u8 label_uuid[NSLABEL_UUID_LEN]; 1208f524bf27SDan Williams unsigned long *free; 1209ae8219f1SDan Williams LIST_HEAD(list); 1210f524bf27SDan Williams u32 nslot, slot; 1211ae8219f1SDan Williams int active = 0; 1212f524bf27SDan Williams 1213f524bf27SDan Williams if (!uuid) 1214f524bf27SDan Williams return 0; 1215f524bf27SDan Williams 1216f524bf27SDan Williams /* no index || no labels == nothing to delete */ 1217ae8219f1SDan Williams if (!preamble_next(ndd, &nsindex, &free, &nslot)) 1218f524bf27SDan Williams return 0; 1219f524bf27SDan Williams 1220ae8219f1SDan Williams mutex_lock(&nd_mapping->lock); 1221ae8219f1SDan Williams list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { 1222ae8219f1SDan Williams struct nd_namespace_label *nd_label = label_ent->label; 1223ae8219f1SDan Williams 1224ae8219f1SDan Williams if (!nd_label) 1225ae8219f1SDan Williams continue; 1226ae8219f1SDan Williams active++; 1227f524bf27SDan Williams memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); 1228f524bf27SDan Williams if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) 1229f524bf27SDan Williams continue; 1230ae8219f1SDan Williams active--; 1231f524bf27SDan Williams slot = to_slot(ndd, nd_label); 1232f524bf27SDan Williams nd_label_free_slot(ndd, slot); 1233426824d6SDan Williams dev_dbg(ndd->dev, "free: %d\n", slot); 1234ae8219f1SDan Williams list_move_tail(&label_ent->list, &list); 1235ae8219f1SDan Williams label_ent->label = NULL; 1236f524bf27SDan Williams } 1237ae8219f1SDan Williams list_splice_tail_init(&list, &nd_mapping->labels); 1238f524bf27SDan Williams 1239ae8219f1SDan Williams if (active == 0) { 1240ae8219f1SDan Williams nd_mapping_free_labels(nd_mapping); 1241426824d6SDan Williams dev_dbg(ndd->dev, "no more active labels\n"); 1242f524bf27SDan Williams } 1243ae8219f1SDan Williams mutex_unlock(&nd_mapping->lock); 1244f524bf27SDan Williams 1245f524bf27SDan Williams return nd_label_write_index(ndd, ndd->ns_next, 1246f524bf27SDan Williams nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); 1247f524bf27SDan Williams } 1248f524bf27SDan Williams 1249f524bf27SDan Williams int nd_pmem_namespace_label_update(struct nd_region *nd_region, 1250f524bf27SDan Williams struct nd_namespace_pmem *nspm, resource_size_t size) 1251f524bf27SDan Williams { 1252*966d23a0SDan Williams int i, rc; 1253f524bf27SDan Williams 1254f524bf27SDan Williams for (i = 0; i < nd_region->ndr_mappings; i++) { 1255f524bf27SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 125616660eaeSDan Williams struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); 125716660eaeSDan Williams struct resource *res; 1258*966d23a0SDan Williams int count = 0; 1259f524bf27SDan Williams 1260f524bf27SDan Williams if (size == 0) { 1261f524bf27SDan Williams rc = del_labels(nd_mapping, nspm->uuid); 1262f524bf27SDan Williams if (rc) 1263f524bf27SDan Williams return rc; 1264f524bf27SDan Williams continue; 1265f524bf27SDan Williams } 1266f524bf27SDan Williams 126716660eaeSDan Williams for_each_dpa_resource(ndd, res) 12682d9a0274SNicolas Iooss if (strncmp(res->name, "pmem", 4) == 0) 126916660eaeSDan Williams count++; 127016660eaeSDan Williams WARN_ON_ONCE(!count); 127116660eaeSDan Williams 127216660eaeSDan Williams rc = init_labels(nd_mapping, count); 12730ba1c634SDan Williams if (rc < 0) 1274f524bf27SDan Williams return rc; 1275f524bf27SDan Williams 1276*966d23a0SDan Williams rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, 1277*966d23a0SDan Williams NSLABEL_FLAG_UPDATING); 1278*966d23a0SDan Williams if (rc) 1279*966d23a0SDan Williams return rc; 1280*966d23a0SDan Williams } 1281*966d23a0SDan Williams 1282*966d23a0SDan Williams if (size == 0) 1283*966d23a0SDan Williams return 0; 1284*966d23a0SDan Williams 1285*966d23a0SDan Williams /* Clear the UPDATING flag per UEFI 2.7 expectations */ 1286*966d23a0SDan Williams for (i = 0; i < nd_region->ndr_mappings; i++) { 1287*966d23a0SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[i]; 1288*966d23a0SDan Williams 1289*966d23a0SDan Williams rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, 0); 1290f524bf27SDan Williams if (rc) 1291f524bf27SDan Williams return rc; 1292f524bf27SDan Williams } 1293f524bf27SDan Williams 1294f524bf27SDan Williams return 0; 1295f524bf27SDan Williams } 12960ba1c634SDan Williams 12970ba1c634SDan Williams int nd_blk_namespace_label_update(struct nd_region *nd_region, 12980ba1c634SDan Williams struct nd_namespace_blk *nsblk, resource_size_t size) 12990ba1c634SDan Williams { 13000ba1c634SDan Williams struct nd_mapping *nd_mapping = &nd_region->mapping[0]; 13010ba1c634SDan Williams struct resource *res; 13020ba1c634SDan Williams int count = 0; 13030ba1c634SDan Williams 13040ba1c634SDan Williams if (size == 0) 13050ba1c634SDan Williams return del_labels(nd_mapping, nsblk->uuid); 13060ba1c634SDan Williams 13070ba1c634SDan Williams for_each_dpa_resource(to_ndd(nd_mapping), res) 13080ba1c634SDan Williams count++; 13090ba1c634SDan Williams 13100ba1c634SDan Williams count = init_labels(nd_mapping, count); 13110ba1c634SDan Williams if (count < 0) 13120ba1c634SDan Williams return count; 13130ba1c634SDan Williams 13140ba1c634SDan Williams return __blk_label_update(nd_region, nd_mapping, nsblk, count); 13150ba1c634SDan Williams } 1316b3fde74eSDan Williams 1317b3fde74eSDan Williams int __init nd_label_init(void) 1318b3fde74eSDan Williams { 1319b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); 132014e49454SVishal Verma WARN_ON(guid_parse(NVDIMM_BTT2_GUID, &nvdimm_btt2_guid)); 1321b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_guid)); 1322b3fde74eSDan Williams WARN_ON(guid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_guid)); 1323b3fde74eSDan Williams 1324b3fde74eSDan Williams return 0; 1325b3fde74eSDan Williams } 1326