1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. 4 */ 5 #ifndef __ND_H__ 6 #define __ND_H__ 7 #include <linux/libnvdimm.h> 8 #include <linux/badblocks.h> 9 #include <linux/blkdev.h> 10 #include <linux/device.h> 11 #include <linux/mutex.h> 12 #include <linux/ndctl.h> 13 #include <linux/types.h> 14 #include <linux/nd.h> 15 #include "label.h" 16 17 enum { 18 /* 19 * Limits the maximum number of block apertures a dimm can 20 * support and is an input to the geometry/on-disk-format of a 21 * BTT instance 22 */ 23 ND_MAX_LANES = 256, 24 INT_LBASIZE_ALIGNMENT = 64, 25 NVDIMM_IO_ATOMIC = 1, 26 }; 27 28 struct nvdimm_drvdata { 29 struct device *dev; 30 int nslabel_size; 31 struct nd_cmd_get_config_size nsarea; 32 void *data; 33 int ns_current, ns_next; 34 struct resource dpa; 35 struct kref kref; 36 }; 37 38 struct nd_region_data { 39 int ns_count; 40 int ns_active; 41 unsigned int hints_shift; 42 void __iomem *flush_wpq[0]; 43 }; 44 45 static inline void __iomem *ndrd_get_flush_wpq(struct nd_region_data *ndrd, 46 int dimm, int hint) 47 { 48 unsigned int num = 1 << ndrd->hints_shift; 49 unsigned int mask = num - 1; 50 51 return ndrd->flush_wpq[dimm * num + (hint & mask)]; 52 } 53 54 static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm, 55 int hint, void __iomem *flush) 56 { 57 unsigned int num = 1 << ndrd->hints_shift; 58 unsigned int mask = num - 1; 59 60 ndrd->flush_wpq[dimm * num + (hint & mask)] = flush; 61 } 62 63 static inline struct nd_namespace_index *to_namespace_index( 64 struct nvdimm_drvdata *ndd, int i) 65 { 66 if (i < 0) 67 return NULL; 68 69 return ndd->data + sizeof_namespace_index(ndd) * i; 70 } 71 72 static inline struct nd_namespace_index *to_current_namespace_index( 73 struct nvdimm_drvdata *ndd) 74 { 75 return to_namespace_index(ndd, ndd->ns_current); 76 } 77 78 static inline struct nd_namespace_index *to_next_namespace_index( 79 struct nvdimm_drvdata *ndd) 80 { 81 return to_namespace_index(ndd, ndd->ns_next); 82 } 83 84 unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd); 85 86 #define namespace_label_has(ndd, field) \ 87 (offsetof(struct nd_namespace_label, field) \ 88 < sizeof_namespace_label(ndd)) 89 90 #define nd_dbg_dpa(r, d, res, fmt, arg...) \ 91 dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \ 92 (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \ 93 (unsigned long long) (res ? resource_size(res) : 0), \ 94 (unsigned long long) (res ? res->start : 0), ##arg) 95 96 #define for_each_dpa_resource(ndd, res) \ 97 for (res = (ndd)->dpa.child; res; res = res->sibling) 98 99 #define for_each_dpa_resource_safe(ndd, res, next) \ 100 for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \ 101 res; res = next, next = next ? next->sibling : NULL) 102 103 struct nd_percpu_lane { 104 int count; 105 spinlock_t lock; 106 }; 107 108 enum nd_label_flags { 109 ND_LABEL_REAP, 110 }; 111 struct nd_label_ent { 112 struct list_head list; 113 unsigned long flags; 114 struct nd_namespace_label *label; 115 }; 116 117 enum nd_mapping_lock_class { 118 ND_MAPPING_CLASS0, 119 ND_MAPPING_UUID_SCAN, 120 }; 121 122 struct nd_mapping { 123 struct nvdimm *nvdimm; 124 u64 start; 125 u64 size; 126 int position; 127 struct list_head labels; 128 struct mutex lock; 129 /* 130 * @ndd is for private use at region enable / disable time for 131 * get_ndd() + put_ndd(), all other nd_mapping to ndd 132 * conversions use to_ndd() which respects enabled state of the 133 * nvdimm. 134 */ 135 struct nvdimm_drvdata *ndd; 136 }; 137 138 struct nd_region { 139 struct device dev; 140 struct ida ns_ida; 141 struct ida btt_ida; 142 struct ida pfn_ida; 143 struct ida dax_ida; 144 unsigned long flags; 145 struct device *ns_seed; 146 struct device *btt_seed; 147 struct device *pfn_seed; 148 struct device *dax_seed; 149 u16 ndr_mappings; 150 u64 ndr_size; 151 u64 ndr_start; 152 int id, num_lanes, ro, numa_node, target_node; 153 void *provider_data; 154 struct kernfs_node *bb_state; 155 struct badblocks bb; 156 struct nd_interleave_set *nd_set; 157 struct nd_percpu_lane __percpu *lane; 158 int (*flush)(struct nd_region *nd_region, struct bio *bio); 159 struct nd_mapping mapping[0]; 160 }; 161 162 struct nd_blk_region { 163 int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev); 164 int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, 165 void *iobuf, u64 len, int rw); 166 void *blk_provider_data; 167 struct nd_region nd_region; 168 }; 169 170 /* 171 * Lookup next in the repeating sequence of 01, 10, and 11. 172 */ 173 static inline unsigned nd_inc_seq(unsigned seq) 174 { 175 static const unsigned next[] = { 0, 2, 3, 1 }; 176 177 return next[seq & 3]; 178 } 179 180 struct btt; 181 struct nd_btt { 182 struct device dev; 183 struct nd_namespace_common *ndns; 184 struct btt *btt; 185 unsigned long lbasize; 186 u64 size; 187 u8 *uuid; 188 int id; 189 int initial_offset; 190 u16 version_major; 191 u16 version_minor; 192 }; 193 194 enum nd_pfn_mode { 195 PFN_MODE_NONE, 196 PFN_MODE_RAM, 197 PFN_MODE_PMEM, 198 }; 199 200 struct nd_pfn { 201 int id; 202 u8 *uuid; 203 struct device dev; 204 unsigned long align; 205 unsigned long npfns; 206 enum nd_pfn_mode mode; 207 struct nd_pfn_sb *pfn_sb; 208 struct nd_namespace_common *ndns; 209 }; 210 211 struct nd_dax { 212 struct nd_pfn nd_pfn; 213 }; 214 215 static inline u32 nd_info_block_reserve(void) 216 { 217 return ALIGN(SZ_8K, PAGE_SIZE); 218 } 219 220 enum nd_async_mode { 221 ND_SYNC, 222 ND_ASYNC, 223 }; 224 225 int nd_integrity_init(struct gendisk *disk, unsigned long meta_size); 226 void wait_nvdimm_bus_probe_idle(struct device *dev); 227 void nd_device_register(struct device *dev); 228 void nd_device_unregister(struct device *dev, enum nd_async_mode mode); 229 void nd_device_notify(struct device *dev, enum nvdimm_event event); 230 int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf, 231 size_t len); 232 ssize_t nd_size_select_show(unsigned long current_size, 233 const unsigned long *supported, char *buf); 234 ssize_t nd_size_select_store(struct device *dev, const char *buf, 235 unsigned long *current_size, const unsigned long *supported); 236 int __init nvdimm_init(void); 237 int __init nd_region_init(void); 238 int __init nd_label_init(void); 239 void nvdimm_exit(void); 240 void nd_region_exit(void); 241 struct nvdimm; 242 extern const struct attribute_group nd_device_attribute_group; 243 extern const struct attribute_group nd_numa_attribute_group; 244 extern const struct attribute_group *nvdimm_bus_attribute_groups[]; 245 struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping); 246 int nvdimm_check_config_data(struct device *dev); 247 int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd); 248 int nvdimm_init_config_data(struct nvdimm_drvdata *ndd); 249 int nvdimm_get_config_data(struct nvdimm_drvdata *ndd, void *buf, 250 size_t offset, size_t len); 251 int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, 252 void *buf, size_t len); 253 long nvdimm_clear_poison(struct device *dev, phys_addr_t phys, 254 unsigned int len); 255 void nvdimm_set_aliasing(struct device *dev); 256 void nvdimm_set_locked(struct device *dev); 257 void nvdimm_clear_locked(struct device *dev); 258 int nvdimm_security_setup_events(struct device *dev); 259 #if IS_ENABLED(CONFIG_NVDIMM_KEYS) 260 int nvdimm_security_unlock(struct device *dev); 261 #else 262 static inline int nvdimm_security_unlock(struct device *dev) 263 { 264 return 0; 265 } 266 #endif 267 struct nd_btt *to_nd_btt(struct device *dev); 268 269 struct nd_gen_sb { 270 char reserved[SZ_4K - 8]; 271 __le64 checksum; 272 }; 273 274 u64 nd_sb_checksum(struct nd_gen_sb *sb); 275 #if IS_ENABLED(CONFIG_BTT) 276 int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns); 277 bool is_nd_btt(struct device *dev); 278 struct device *nd_btt_create(struct nd_region *nd_region); 279 #else 280 static inline int nd_btt_probe(struct device *dev, 281 struct nd_namespace_common *ndns) 282 { 283 return -ENODEV; 284 } 285 286 static inline bool is_nd_btt(struct device *dev) 287 { 288 return false; 289 } 290 291 static inline struct device *nd_btt_create(struct nd_region *nd_region) 292 { 293 return NULL; 294 } 295 #endif 296 297 struct nd_pfn *to_nd_pfn(struct device *dev); 298 #if IS_ENABLED(CONFIG_NVDIMM_PFN) 299 300 #define MAX_NVDIMM_ALIGN 4 301 302 int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns); 303 bool is_nd_pfn(struct device *dev); 304 struct device *nd_pfn_create(struct nd_region *nd_region); 305 struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn, 306 struct nd_namespace_common *ndns); 307 int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig); 308 extern const struct attribute_group *nd_pfn_attribute_groups[]; 309 #else 310 static inline int nd_pfn_probe(struct device *dev, 311 struct nd_namespace_common *ndns) 312 { 313 return -ENODEV; 314 } 315 316 static inline bool is_nd_pfn(struct device *dev) 317 { 318 return false; 319 } 320 321 static inline struct device *nd_pfn_create(struct nd_region *nd_region) 322 { 323 return NULL; 324 } 325 326 static inline int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig) 327 { 328 return -ENODEV; 329 } 330 #endif 331 332 struct nd_dax *to_nd_dax(struct device *dev); 333 #if IS_ENABLED(CONFIG_NVDIMM_DAX) 334 int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns); 335 bool is_nd_dax(struct device *dev); 336 struct device *nd_dax_create(struct nd_region *nd_region); 337 #else 338 static inline int nd_dax_probe(struct device *dev, 339 struct nd_namespace_common *ndns) 340 { 341 return -ENODEV; 342 } 343 344 static inline bool is_nd_dax(struct device *dev) 345 { 346 return false; 347 } 348 349 static inline struct device *nd_dax_create(struct nd_region *nd_region) 350 { 351 return NULL; 352 } 353 #endif 354 355 int nd_region_to_nstype(struct nd_region *nd_region); 356 int nd_region_register_namespaces(struct nd_region *nd_region, int *err); 357 u64 nd_region_interleave_set_cookie(struct nd_region *nd_region, 358 struct nd_namespace_index *nsindex); 359 u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region); 360 void nvdimm_bus_lock(struct device *dev); 361 void nvdimm_bus_unlock(struct device *dev); 362 bool is_nvdimm_bus_locked(struct device *dev); 363 int nvdimm_revalidate_disk(struct gendisk *disk); 364 void nvdimm_drvdata_release(struct kref *kref); 365 void put_ndd(struct nvdimm_drvdata *ndd); 366 int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd); 367 void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res); 368 struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd, 369 struct nd_label_id *label_id, resource_size_t start, 370 resource_size_t n); 371 resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns); 372 bool nvdimm_namespace_locked(struct nd_namespace_common *ndns); 373 struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev); 374 int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns); 375 int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt); 376 const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, 377 char *name); 378 unsigned int pmem_sector_size(struct nd_namespace_common *ndns); 379 void nvdimm_badblocks_populate(struct nd_region *nd_region, 380 struct badblocks *bb, const struct resource *res); 381 int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns, 382 resource_size_t size); 383 void devm_namespace_disable(struct device *dev, 384 struct nd_namespace_common *ndns); 385 #if IS_ENABLED(CONFIG_ND_CLAIM) 386 /* max struct page size independent of kernel config */ 387 #define MAX_STRUCT_PAGE_SIZE 64 388 int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap); 389 #else 390 static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, 391 struct dev_pagemap *pgmap) 392 { 393 return -ENXIO; 394 } 395 #endif 396 int nd_blk_region_init(struct nd_region *nd_region); 397 int nd_region_activate(struct nd_region *nd_region); 398 void __nd_iostat_start(struct bio *bio, unsigned long *start); 399 static inline bool nd_iostat_start(struct bio *bio, unsigned long *start) 400 { 401 struct gendisk *disk = bio->bi_disk; 402 403 if (!blk_queue_io_stat(disk->queue)) 404 return false; 405 406 *start = jiffies; 407 generic_start_io_acct(disk->queue, bio_op(bio), bio_sectors(bio), 408 &disk->part0); 409 return true; 410 } 411 static inline void nd_iostat_end(struct bio *bio, unsigned long start) 412 { 413 struct gendisk *disk = bio->bi_disk; 414 415 generic_end_io_acct(disk->queue, bio_op(bio), &disk->part0, start); 416 } 417 static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector, 418 unsigned int len) 419 { 420 if (bb->count) { 421 sector_t first_bad; 422 int num_bad; 423 424 return !!badblocks_check(bb, sector, len / 512, &first_bad, 425 &num_bad); 426 } 427 428 return false; 429 } 430 resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk); 431 const u8 *nd_dev_to_uuid(struct device *dev); 432 bool pmem_should_map_pages(struct device *dev); 433 #endif /* __ND_H__ */ 434