1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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>
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
24 INT_LBASIZE_ALIGNMENT = 64,
28 struct nvdimm_drvdata {
31 struct nd_cmd_get_config_size nsarea;
34 int ns_current, ns_next;
39 static inline const u8 *nsl_ref_name(struct nvdimm_drvdata *ndd,
40 struct nd_namespace_label *nd_label)
43 return nd_label->cxl.name;
44 return nd_label->efi.name;
47 static inline u8 *nsl_get_name(struct nvdimm_drvdata *ndd,
48 struct nd_namespace_label *nd_label, u8 *name)
51 return memcpy(name, nd_label->cxl.name, NSLABEL_NAME_LEN);
52 return memcpy(name, nd_label->efi.name, NSLABEL_NAME_LEN);
55 static inline u8 *nsl_set_name(struct nvdimm_drvdata *ndd,
56 struct nd_namespace_label *nd_label, u8 *name)
61 return memcpy(nd_label->cxl.name, name, NSLABEL_NAME_LEN);
62 return memcpy(nd_label->efi.name, name, NSLABEL_NAME_LEN);
65 static inline u32 nsl_get_slot(struct nvdimm_drvdata *ndd,
66 struct nd_namespace_label *nd_label)
69 return __le32_to_cpu(nd_label->cxl.slot);
70 return __le32_to_cpu(nd_label->efi.slot);
73 static inline void nsl_set_slot(struct nvdimm_drvdata *ndd,
74 struct nd_namespace_label *nd_label, u32 slot)
77 nd_label->cxl.slot = __cpu_to_le32(slot);
79 nd_label->efi.slot = __cpu_to_le32(slot);
82 static inline u64 nsl_get_checksum(struct nvdimm_drvdata *ndd,
83 struct nd_namespace_label *nd_label)
86 return __le64_to_cpu(nd_label->cxl.checksum);
87 return __le64_to_cpu(nd_label->efi.checksum);
90 static inline void nsl_set_checksum(struct nvdimm_drvdata *ndd,
91 struct nd_namespace_label *nd_label,
95 nd_label->cxl.checksum = __cpu_to_le64(checksum);
97 nd_label->efi.checksum = __cpu_to_le64(checksum);
100 static inline u32 nsl_get_flags(struct nvdimm_drvdata *ndd,
101 struct nd_namespace_label *nd_label)
104 return __le32_to_cpu(nd_label->cxl.flags);
105 return __le32_to_cpu(nd_label->efi.flags);
108 static inline void nsl_set_flags(struct nvdimm_drvdata *ndd,
109 struct nd_namespace_label *nd_label, u32 flags)
112 nd_label->cxl.flags = __cpu_to_le32(flags);
114 nd_label->efi.flags = __cpu_to_le32(flags);
117 static inline u64 nsl_get_dpa(struct nvdimm_drvdata *ndd,
118 struct nd_namespace_label *nd_label)
121 return __le64_to_cpu(nd_label->cxl.dpa);
122 return __le64_to_cpu(nd_label->efi.dpa);
125 static inline void nsl_set_dpa(struct nvdimm_drvdata *ndd,
126 struct nd_namespace_label *nd_label, u64 dpa)
129 nd_label->cxl.dpa = __cpu_to_le64(dpa);
131 nd_label->efi.dpa = __cpu_to_le64(dpa);
134 static inline u64 nsl_get_rawsize(struct nvdimm_drvdata *ndd,
135 struct nd_namespace_label *nd_label)
138 return __le64_to_cpu(nd_label->cxl.rawsize);
139 return __le64_to_cpu(nd_label->efi.rawsize);
142 static inline void nsl_set_rawsize(struct nvdimm_drvdata *ndd,
143 struct nd_namespace_label *nd_label,
147 nd_label->cxl.rawsize = __cpu_to_le64(rawsize);
149 nd_label->efi.rawsize = __cpu_to_le64(rawsize);
152 static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd,
153 struct nd_namespace_label *nd_label)
155 /* WARN future refactor attempts that break this assumption */
156 if (dev_WARN_ONCE(ndd->dev, ndd->cxl,
157 "CXL labels do not use the isetcookie concept\n"))
159 return __le64_to_cpu(nd_label->efi.isetcookie);
162 static inline void nsl_set_isetcookie(struct nvdimm_drvdata *ndd,
163 struct nd_namespace_label *nd_label,
167 nd_label->efi.isetcookie = __cpu_to_le64(isetcookie);
170 static inline bool nsl_validate_isetcookie(struct nvdimm_drvdata *ndd,
171 struct nd_namespace_label *nd_label,
175 * Let the EFI and CXL validation comingle, where fields that
176 * don't matter to CXL always validate.
180 return cookie == __le64_to_cpu(nd_label->efi.isetcookie);
183 static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd,
184 struct nd_namespace_label *nd_label)
187 return __le16_to_cpu(nd_label->cxl.position);
188 return __le16_to_cpu(nd_label->efi.position);
191 static inline void nsl_set_position(struct nvdimm_drvdata *ndd,
192 struct nd_namespace_label *nd_label,
196 nd_label->cxl.position = __cpu_to_le16(position);
198 nd_label->efi.position = __cpu_to_le16(position);
201 static inline u16 nsl_get_nlabel(struct nvdimm_drvdata *ndd,
202 struct nd_namespace_label *nd_label)
206 return __le16_to_cpu(nd_label->efi.nlabel);
209 static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd,
210 struct nd_namespace_label *nd_label,
214 nd_label->efi.nlabel = __cpu_to_le16(nlabel);
217 static inline u16 nsl_get_nrange(struct nvdimm_drvdata *ndd,
218 struct nd_namespace_label *nd_label)
221 return __le16_to_cpu(nd_label->cxl.nrange);
225 static inline void nsl_set_nrange(struct nvdimm_drvdata *ndd,
226 struct nd_namespace_label *nd_label,
230 nd_label->cxl.nrange = __cpu_to_le16(nrange);
233 static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd,
234 struct nd_namespace_label *nd_label)
237 * Yes, for some reason the EFI labels convey a massive 64-bit
238 * lbasize, that got fixed for CXL.
241 return __le16_to_cpu(nd_label->cxl.lbasize);
242 return __le64_to_cpu(nd_label->efi.lbasize);
245 static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
246 struct nd_namespace_label *nd_label,
250 nd_label->cxl.lbasize = __cpu_to_le16(lbasize);
252 nd_label->efi.lbasize = __cpu_to_le64(lbasize);
255 static inline const uuid_t *nsl_get_uuid(struct nvdimm_drvdata *ndd,
256 struct nd_namespace_label *nd_label,
260 import_uuid(uuid, nd_label->cxl.uuid);
262 import_uuid(uuid, nd_label->efi.uuid);
266 static inline const uuid_t *nsl_set_uuid(struct nvdimm_drvdata *ndd,
267 struct nd_namespace_label *nd_label,
271 export_uuid(nd_label->cxl.uuid, uuid);
273 export_uuid(nd_label->efi.uuid, uuid);
277 static inline bool nsl_uuid_equal(struct nvdimm_drvdata *ndd,
278 struct nd_namespace_label *nd_label,
284 import_uuid(&tmp, nd_label->cxl.uuid);
286 import_uuid(&tmp, nd_label->efi.uuid);
287 return uuid_equal(&tmp, uuid);
290 static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd,
291 struct nd_namespace_label *nd_label)
294 return nd_label->cxl.uuid;
295 return nd_label->efi.uuid;
298 bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
299 struct nd_namespace_label *nd_label, guid_t *guid);
300 enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd,
301 struct nd_namespace_label *nd_label);
303 struct nd_region_data {
306 unsigned int hints_shift;
307 void __iomem *flush_wpq[];
310 static inline void __iomem *ndrd_get_flush_wpq(struct nd_region_data *ndrd,
313 unsigned int num = 1 << ndrd->hints_shift;
314 unsigned int mask = num - 1;
316 return ndrd->flush_wpq[dimm * num + (hint & mask)];
319 static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm,
320 int hint, void __iomem *flush)
322 unsigned int num = 1 << ndrd->hints_shift;
323 unsigned int mask = num - 1;
325 ndrd->flush_wpq[dimm * num + (hint & mask)] = flush;
328 static inline struct nd_namespace_index *to_namespace_index(
329 struct nvdimm_drvdata *ndd, int i)
334 return ndd->data + sizeof_namespace_index(ndd) * i;
337 static inline struct nd_namespace_index *to_current_namespace_index(
338 struct nvdimm_drvdata *ndd)
340 return to_namespace_index(ndd, ndd->ns_current);
343 static inline struct nd_namespace_index *to_next_namespace_index(
344 struct nvdimm_drvdata *ndd)
346 return to_namespace_index(ndd, ndd->ns_next);
349 unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd);
351 #define efi_namespace_label_has(ndd, field) \
352 (!ndd->cxl && offsetof(struct nvdimm_efi_label, field) \
353 < sizeof_namespace_label(ndd))
355 #define nd_dbg_dpa(r, d, res, fmt, arg...) \
356 dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
357 (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
358 (unsigned long long) (res ? resource_size(res) : 0), \
359 (unsigned long long) (res ? res->start : 0), ##arg)
361 #define for_each_dpa_resource(ndd, res) \
362 for (res = (ndd)->dpa.child; res; res = res->sibling)
364 #define for_each_dpa_resource_safe(ndd, res, next) \
365 for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
366 res; res = next, next = next ? next->sibling : NULL)
368 struct nd_percpu_lane {
373 enum nd_label_flags {
376 struct nd_label_ent {
377 struct list_head list;
379 struct nd_namespace_label *label;
382 enum nd_mapping_lock_class {
384 ND_MAPPING_UUID_SCAN,
388 struct nvdimm *nvdimm;
392 struct list_head labels;
395 * @ndd is for private use at region enable / disable time for
396 * get_ndd() + put_ndd(), all other nd_mapping to ndd
397 * conversions use to_ndd() which respects enabled state of the
400 struct nvdimm_drvdata *ndd;
410 struct device *ns_seed;
411 struct device *btt_seed;
412 struct device *pfn_seed;
413 struct device *dax_seed;
418 int id, num_lanes, ro, numa_node, target_node;
420 struct kernfs_node *bb_state;
422 struct nd_interleave_set *nd_set;
423 struct nd_percpu_lane __percpu *lane;
424 int (*flush)(struct nd_region *nd_region, struct bio *bio);
425 struct nd_mapping mapping[];
428 static inline bool nsl_validate_nlabel(struct nd_region *nd_region,
429 struct nvdimm_drvdata *ndd,
430 struct nd_namespace_label *nd_label)
434 return nsl_get_nlabel(ndd, nd_label) == nd_region->ndr_mappings;
438 * Lookup next in the repeating sequence of 01, 10, and 11.
440 static inline unsigned nd_inc_seq(unsigned seq)
442 static const unsigned next[] = { 0, 2, 3, 1 };
444 return next[seq & 3];
450 struct nd_namespace_common *ndns;
452 unsigned long lbasize;
473 enum nd_pfn_mode mode;
474 struct nd_pfn_sb *pfn_sb;
475 struct nd_namespace_common *ndns;
479 struct nd_pfn nd_pfn;
482 static inline u32 nd_info_block_reserve(void)
484 return ALIGN(SZ_8K, PAGE_SIZE);
492 int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
493 void wait_nvdimm_bus_probe_idle(struct device *dev);
494 void nd_device_register(struct device *dev);
495 void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
496 void nd_device_notify(struct device *dev, enum nvdimm_event event);
497 int nd_uuid_store(struct device *dev, uuid_t **uuid_out, const char *buf,
499 ssize_t nd_size_select_show(unsigned long current_size,
500 const unsigned long *supported, char *buf);
501 ssize_t nd_size_select_store(struct device *dev, const char *buf,
502 unsigned long *current_size, const unsigned long *supported);
503 int __init nvdimm_init(void);
504 int __init nd_region_init(void);
505 int __init nd_label_init(void);
506 void nvdimm_exit(void);
507 void nd_region_exit(void);
509 extern const struct attribute_group nd_device_attribute_group;
510 extern const struct attribute_group nd_numa_attribute_group;
511 extern const struct attribute_group *nvdimm_bus_attribute_groups[];
512 struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
513 int nvdimm_check_config_data(struct device *dev);
514 int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
515 int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
516 int nvdimm_get_config_data(struct nvdimm_drvdata *ndd, void *buf,
517 size_t offset, size_t len);
518 int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
519 void *buf, size_t len);
520 long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
522 void nvdimm_set_labeling(struct device *dev);
523 void nvdimm_set_locked(struct device *dev);
524 void nvdimm_clear_locked(struct device *dev);
525 int nvdimm_security_setup_events(struct device *dev);
526 #if IS_ENABLED(CONFIG_NVDIMM_KEYS)
527 int nvdimm_security_unlock(struct device *dev);
529 static inline int nvdimm_security_unlock(struct device *dev)
534 struct nd_btt *to_nd_btt(struct device *dev);
537 char reserved[SZ_4K - 8];
541 u64 nd_sb_checksum(struct nd_gen_sb *sb);
542 #if IS_ENABLED(CONFIG_BTT)
543 int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns);
544 bool is_nd_btt(struct device *dev);
545 struct device *nd_btt_create(struct nd_region *nd_region);
547 static inline int nd_btt_probe(struct device *dev,
548 struct nd_namespace_common *ndns)
553 static inline bool is_nd_btt(struct device *dev)
558 static inline struct device *nd_btt_create(struct nd_region *nd_region)
564 struct nd_pfn *to_nd_pfn(struct device *dev);
565 #if IS_ENABLED(CONFIG_NVDIMM_PFN)
567 #define MAX_NVDIMM_ALIGN 4
569 int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns);
570 bool is_nd_pfn(struct device *dev);
571 struct device *nd_pfn_create(struct nd_region *nd_region);
572 struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn,
573 struct nd_namespace_common *ndns);
574 int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig);
575 extern const struct attribute_group *nd_pfn_attribute_groups[];
577 static inline int nd_pfn_probe(struct device *dev,
578 struct nd_namespace_common *ndns)
583 static inline bool is_nd_pfn(struct device *dev)
588 static inline struct device *nd_pfn_create(struct nd_region *nd_region)
593 static inline int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
599 struct nd_dax *to_nd_dax(struct device *dev);
600 #if IS_ENABLED(CONFIG_NVDIMM_DAX)
601 int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns);
602 bool is_nd_dax(const struct device *dev);
603 struct device *nd_dax_create(struct nd_region *nd_region);
605 static inline int nd_dax_probe(struct device *dev,
606 struct nd_namespace_common *ndns)
611 static inline bool is_nd_dax(const struct device *dev)
616 static inline struct device *nd_dax_create(struct nd_region *nd_region)
622 int nd_region_to_nstype(struct nd_region *nd_region);
623 int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
624 u64 nd_region_interleave_set_cookie(struct nd_region *nd_region,
625 struct nd_namespace_index *nsindex);
626 u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region);
627 void nvdimm_bus_lock(struct device *dev);
628 void nvdimm_bus_unlock(struct device *dev);
629 bool is_nvdimm_bus_locked(struct device *dev);
630 void nvdimm_check_and_set_ro(struct gendisk *disk);
631 void nvdimm_drvdata_release(struct kref *kref);
632 void put_ndd(struct nvdimm_drvdata *ndd);
633 int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
634 void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
635 struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
636 struct nd_label_id *label_id, resource_size_t start,
638 resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
639 bool nvdimm_namespace_locked(struct nd_namespace_common *ndns);
640 struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
641 int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
642 int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
643 const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
645 unsigned int pmem_sector_size(struct nd_namespace_common *ndns);
647 void nvdimm_badblocks_populate(struct nd_region *nd_region,
648 struct badblocks *bb, const struct range *range);
649 int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns,
650 resource_size_t size);
651 void devm_namespace_disable(struct device *dev,
652 struct nd_namespace_common *ndns);
653 #if IS_ENABLED(CONFIG_ND_CLAIM)
654 /* max struct page size independent of kernel config */
655 #define MAX_STRUCT_PAGE_SIZE 64
656 int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap);
658 static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
659 struct dev_pagemap *pgmap)
664 int nd_region_activate(struct nd_region *nd_region);
665 static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
672 return !!badblocks_check(bb, sector, len / 512, &first_bad,
678 const uuid_t *nd_dev_to_uuid(struct device *dev);
679 bool pmem_should_map_pages(struct device *dev);
680 #endif /* __ND_H__ */