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4d88a97a DW |
1 | /* |
2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | */ | |
13 | #ifndef __ND_H__ | |
14 | #define __ND_H__ | |
1f7df6f8 | 15 | #include <linux/libnvdimm.h> |
200c79da | 16 | #include <linux/badblocks.h> |
f0dc089c | 17 | #include <linux/blkdev.h> |
4d88a97a DW |
18 | #include <linux/device.h> |
19 | #include <linux/mutex.h> | |
20 | #include <linux/ndctl.h> | |
bf9bccc1 | 21 | #include <linux/types.h> |
71999466 | 22 | #include <linux/nd.h> |
4a826c83 | 23 | #include "label.h" |
4d88a97a | 24 | |
8c2f7e86 | 25 | enum { |
5212e11f VV |
26 | /* |
27 | * Limits the maximum number of block apertures a dimm can | |
28 | * support and is an input to the geometry/on-disk-format of a | |
29 | * BTT instance | |
30 | */ | |
31 | ND_MAX_LANES = 256, | |
8c2f7e86 | 32 | SECTOR_SHIFT = 9, |
fcae6957 | 33 | INT_LBASIZE_ALIGNMENT = 64, |
3ae3d67b | 34 | NVDIMM_IO_ATOMIC = 1, |
8c2f7e86 DW |
35 | }; |
36 | ||
0caeef63 VV |
37 | struct nd_poison { |
38 | u64 start; | |
39 | u64 length; | |
40 | struct list_head list; | |
41 | }; | |
42 | ||
4d88a97a DW |
43 | struct nvdimm_drvdata { |
44 | struct device *dev; | |
564e871a | 45 | int nsindex_size, nslabel_size; |
4d88a97a DW |
46 | struct nd_cmd_get_config_size nsarea; |
47 | void *data; | |
4a826c83 DW |
48 | int ns_current, ns_next; |
49 | struct resource dpa; | |
bf9bccc1 | 50 | struct kref kref; |
4d88a97a DW |
51 | }; |
52 | ||
e5ae3b25 DW |
53 | struct nd_region_data { |
54 | int ns_count; | |
55 | int ns_active; | |
595c7307 DW |
56 | unsigned int hints_shift; |
57 | void __iomem *flush_wpq[0]; | |
3d88002e DW |
58 | }; |
59 | ||
595c7307 DW |
60 | static inline void __iomem *ndrd_get_flush_wpq(struct nd_region_data *ndrd, |
61 | int dimm, int hint) | |
62 | { | |
63 | unsigned int num = 1 << ndrd->hints_shift; | |
64 | unsigned int mask = num - 1; | |
65 | ||
66 | return ndrd->flush_wpq[dimm * num + (hint & mask)]; | |
67 | } | |
68 | ||
69 | static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm, | |
70 | int hint, void __iomem *flush) | |
71 | { | |
72 | unsigned int num = 1 << ndrd->hints_shift; | |
73 | unsigned int mask = num - 1; | |
74 | ||
75 | ndrd->flush_wpq[dimm * num + (hint & mask)] = flush; | |
76 | } | |
77 | ||
4a826c83 DW |
78 | static inline struct nd_namespace_index *to_namespace_index( |
79 | struct nvdimm_drvdata *ndd, int i) | |
80 | { | |
81 | if (i < 0) | |
82 | return NULL; | |
83 | ||
84 | return ndd->data + sizeof_namespace_index(ndd) * i; | |
85 | } | |
86 | ||
87 | static inline struct nd_namespace_index *to_current_namespace_index( | |
88 | struct nvdimm_drvdata *ndd) | |
89 | { | |
90 | return to_namespace_index(ndd, ndd->ns_current); | |
91 | } | |
92 | ||
93 | static inline struct nd_namespace_index *to_next_namespace_index( | |
94 | struct nvdimm_drvdata *ndd) | |
95 | { | |
96 | return to_namespace_index(ndd, ndd->ns_next); | |
97 | } | |
98 | ||
564e871a DW |
99 | unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd); |
100 | ||
101 | #define namespace_label_has(ndd, field) \ | |
102 | (offsetof(struct nd_namespace_label, field) \ | |
103 | < sizeof_namespace_label(ndd)) | |
104 | ||
4a826c83 DW |
105 | #define nd_dbg_dpa(r, d, res, fmt, arg...) \ |
106 | dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \ | |
107 | (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \ | |
108 | (unsigned long long) (res ? resource_size(res) : 0), \ | |
109 | (unsigned long long) (res ? res->start : 0), ##arg) | |
110 | ||
bf9bccc1 DW |
111 | #define for_each_dpa_resource(ndd, res) \ |
112 | for (res = (ndd)->dpa.child; res; res = res->sibling) | |
113 | ||
4a826c83 DW |
114 | #define for_each_dpa_resource_safe(ndd, res, next) \ |
115 | for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \ | |
116 | res; res = next, next = next ? next->sibling : NULL) | |
117 | ||
5212e11f VV |
118 | struct nd_percpu_lane { |
119 | int count; | |
120 | spinlock_t lock; | |
121 | }; | |
122 | ||
ae8219f1 DW |
123 | struct nd_label_ent { |
124 | struct list_head list; | |
125 | struct nd_namespace_label *label; | |
126 | }; | |
127 | ||
128 | enum nd_mapping_lock_class { | |
129 | ND_MAPPING_CLASS0, | |
130 | ND_MAPPING_UUID_SCAN, | |
131 | }; | |
132 | ||
44c462eb DW |
133 | struct nd_mapping { |
134 | struct nvdimm *nvdimm; | |
44c462eb DW |
135 | u64 start; |
136 | u64 size; | |
ae8219f1 DW |
137 | struct list_head labels; |
138 | struct mutex lock; | |
44c462eb DW |
139 | /* |
140 | * @ndd is for private use at region enable / disable time for | |
141 | * get_ndd() + put_ndd(), all other nd_mapping to ndd | |
142 | * conversions use to_ndd() which respects enabled state of the | |
143 | * nvdimm. | |
144 | */ | |
145 | struct nvdimm_drvdata *ndd; | |
146 | }; | |
147 | ||
1f7df6f8 DW |
148 | struct nd_region { |
149 | struct device dev; | |
1b40e09a | 150 | struct ida ns_ida; |
8c2f7e86 | 151 | struct ida btt_ida; |
e1455744 | 152 | struct ida pfn_ida; |
cd03412a | 153 | struct ida dax_ida; |
004f1afb | 154 | unsigned long flags; |
bf9bccc1 | 155 | struct device *ns_seed; |
8c2f7e86 | 156 | struct device *btt_seed; |
e1455744 | 157 | struct device *pfn_seed; |
cd03412a | 158 | struct device *dax_seed; |
1f7df6f8 DW |
159 | u16 ndr_mappings; |
160 | u64 ndr_size; | |
161 | u64 ndr_start; | |
41d7a6d6 | 162 | int id, num_lanes, ro, numa_node; |
1f7df6f8 | 163 | void *provider_data; |
975750a9 | 164 | struct kernfs_node *bb_state; |
6a6bef90 | 165 | struct badblocks bb; |
eaf96153 | 166 | struct nd_interleave_set *nd_set; |
5212e11f | 167 | struct nd_percpu_lane __percpu *lane; |
1f7df6f8 DW |
168 | struct nd_mapping mapping[0]; |
169 | }; | |
170 | ||
047fc8a1 RZ |
171 | struct nd_blk_region { |
172 | int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev); | |
047fc8a1 RZ |
173 | int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, |
174 | void *iobuf, u64 len, int rw); | |
175 | void *blk_provider_data; | |
176 | struct nd_region nd_region; | |
177 | }; | |
178 | ||
4a826c83 DW |
179 | /* |
180 | * Lookup next in the repeating sequence of 01, 10, and 11. | |
181 | */ | |
182 | static inline unsigned nd_inc_seq(unsigned seq) | |
183 | { | |
184 | static const unsigned next[] = { 0, 2, 3, 1 }; | |
185 | ||
186 | return next[seq & 3]; | |
187 | } | |
f524bf27 | 188 | |
5212e11f | 189 | struct btt; |
8c2f7e86 DW |
190 | struct nd_btt { |
191 | struct device dev; | |
192 | struct nd_namespace_common *ndns; | |
5212e11f | 193 | struct btt *btt; |
8c2f7e86 | 194 | unsigned long lbasize; |
abe8b4e3 | 195 | u64 size; |
8c2f7e86 DW |
196 | u8 *uuid; |
197 | int id; | |
198 | }; | |
199 | ||
e1455744 DW |
200 | enum nd_pfn_mode { |
201 | PFN_MODE_NONE, | |
202 | PFN_MODE_RAM, | |
203 | PFN_MODE_PMEM, | |
204 | }; | |
205 | ||
206 | struct nd_pfn { | |
207 | int id; | |
208 | u8 *uuid; | |
209 | struct device dev; | |
315c5625 | 210 | unsigned long align; |
e1455744 DW |
211 | unsigned long npfns; |
212 | enum nd_pfn_mode mode; | |
213 | struct nd_pfn_sb *pfn_sb; | |
214 | struct nd_namespace_common *ndns; | |
215 | }; | |
216 | ||
cd03412a DW |
217 | struct nd_dax { |
218 | struct nd_pfn nd_pfn; | |
219 | }; | |
220 | ||
4d88a97a DW |
221 | enum nd_async_mode { |
222 | ND_SYNC, | |
223 | ND_ASYNC, | |
224 | }; | |
225 | ||
41cd8b70 | 226 | int nd_integrity_init(struct gendisk *disk, unsigned long meta_size); |
bf9bccc1 | 227 | void wait_nvdimm_bus_probe_idle(struct device *dev); |
4d88a97a DW |
228 | void nd_device_register(struct device *dev); |
229 | void nd_device_unregister(struct device *dev, enum nd_async_mode mode); | |
71999466 | 230 | void nd_device_notify(struct device *dev, enum nvdimm_event event); |
bf9bccc1 DW |
231 | int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf, |
232 | size_t len); | |
1b40e09a DW |
233 | ssize_t nd_sector_size_show(unsigned long current_lbasize, |
234 | const unsigned long *supported, char *buf); | |
235 | ssize_t nd_sector_size_store(struct device *dev, const char *buf, | |
236 | unsigned long *current_lbasize, const unsigned long *supported); | |
4d88a97a | 237 | int __init nvdimm_init(void); |
3d88002e | 238 | int __init nd_region_init(void); |
b3fde74e | 239 | int __init nd_label_init(void); |
4d88a97a | 240 | void nvdimm_exit(void); |
3d88002e | 241 | void nd_region_exit(void); |
bf9bccc1 DW |
242 | struct nvdimm; |
243 | struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping); | |
aee65987 | 244 | int nvdimm_check_config_data(struct device *dev); |
4d88a97a DW |
245 | int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd); |
246 | int nvdimm_init_config_data(struct nvdimm_drvdata *ndd); | |
f524bf27 DW |
247 | int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, |
248 | void *buf, size_t len); | |
59e64739 DW |
249 | long nvdimm_clear_poison(struct device *dev, phys_addr_t phys, |
250 | unsigned int len); | |
42237e39 | 251 | void nvdimm_set_aliasing(struct device *dev); |
8f078b38 | 252 | void nvdimm_set_locked(struct device *dev); |
8c2f7e86 | 253 | struct nd_btt *to_nd_btt(struct device *dev); |
e1455744 DW |
254 | |
255 | struct nd_gen_sb { | |
256 | char reserved[SZ_4K - 8]; | |
257 | __le64 checksum; | |
258 | }; | |
259 | ||
260 | u64 nd_sb_checksum(struct nd_gen_sb *sb); | |
8c2f7e86 | 261 | #if IS_ENABLED(CONFIG_BTT) |
200c79da | 262 | int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns); |
8c2f7e86 DW |
263 | bool is_nd_btt(struct device *dev); |
264 | struct device *nd_btt_create(struct nd_region *nd_region); | |
265 | #else | |
e32bc729 | 266 | static inline int nd_btt_probe(struct device *dev, |
200c79da | 267 | struct nd_namespace_common *ndns) |
8c2f7e86 DW |
268 | { |
269 | return -ENODEV; | |
270 | } | |
271 | ||
272 | static inline bool is_nd_btt(struct device *dev) | |
273 | { | |
274 | return false; | |
275 | } | |
276 | ||
277 | static inline struct device *nd_btt_create(struct nd_region *nd_region) | |
278 | { | |
279 | return NULL; | |
280 | } | |
e1455744 | 281 | #endif |
8c2f7e86 | 282 | |
e1455744 DW |
283 | struct nd_pfn *to_nd_pfn(struct device *dev); |
284 | #if IS_ENABLED(CONFIG_NVDIMM_PFN) | |
200c79da | 285 | int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns); |
e1455744 DW |
286 | bool is_nd_pfn(struct device *dev); |
287 | struct device *nd_pfn_create(struct nd_region *nd_region); | |
cd03412a DW |
288 | struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn, |
289 | struct nd_namespace_common *ndns); | |
c5ed9268 | 290 | int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig); |
cd03412a | 291 | extern struct attribute_group nd_pfn_attribute_group; |
e1455744 | 292 | #else |
200c79da DW |
293 | static inline int nd_pfn_probe(struct device *dev, |
294 | struct nd_namespace_common *ndns) | |
e1455744 DW |
295 | { |
296 | return -ENODEV; | |
297 | } | |
298 | ||
299 | static inline bool is_nd_pfn(struct device *dev) | |
300 | { | |
301 | return false; | |
302 | } | |
303 | ||
304 | static inline struct device *nd_pfn_create(struct nd_region *nd_region) | |
305 | { | |
306 | return NULL; | |
307 | } | |
32ab0a3f | 308 | |
c5ed9268 | 309 | static inline int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig) |
32ab0a3f DW |
310 | { |
311 | return -ENODEV; | |
312 | } | |
8c2f7e86 | 313 | #endif |
e1455744 | 314 | |
cd03412a DW |
315 | struct nd_dax *to_nd_dax(struct device *dev); |
316 | #if IS_ENABLED(CONFIG_NVDIMM_DAX) | |
c5ed9268 | 317 | int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns); |
cd03412a DW |
318 | bool is_nd_dax(struct device *dev); |
319 | struct device *nd_dax_create(struct nd_region *nd_region); | |
320 | #else | |
c5ed9268 DW |
321 | static inline int nd_dax_probe(struct device *dev, |
322 | struct nd_namespace_common *ndns) | |
323 | { | |
324 | return -ENODEV; | |
325 | } | |
326 | ||
cd03412a DW |
327 | static inline bool is_nd_dax(struct device *dev) |
328 | { | |
329 | return false; | |
330 | } | |
331 | ||
332 | static inline struct device *nd_dax_create(struct nd_region *nd_region) | |
333 | { | |
334 | return NULL; | |
335 | } | |
336 | #endif | |
337 | ||
3d88002e DW |
338 | struct nd_region *to_nd_region(struct device *dev); |
339 | int nd_region_to_nstype(struct nd_region *nd_region); | |
340 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err); | |
c12c48ce DW |
341 | u64 nd_region_interleave_set_cookie(struct nd_region *nd_region, |
342 | struct nd_namespace_index *nsindex); | |
86ef58a4 | 343 | u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region); |
3d88002e DW |
344 | void nvdimm_bus_lock(struct device *dev); |
345 | void nvdimm_bus_unlock(struct device *dev); | |
346 | bool is_nvdimm_bus_locked(struct device *dev); | |
58138820 | 347 | int nvdimm_revalidate_disk(struct gendisk *disk); |
bf9bccc1 DW |
348 | void nvdimm_drvdata_release(struct kref *kref); |
349 | void put_ndd(struct nvdimm_drvdata *ndd); | |
4a826c83 DW |
350 | int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd); |
351 | void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res); | |
352 | struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd, | |
353 | struct nd_label_id *label_id, resource_size_t start, | |
354 | resource_size_t n); | |
8c2f7e86 DW |
355 | resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns); |
356 | struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev); | |
5212e11f | 357 | int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns); |
298f2bc5 | 358 | int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt); |
5212e11f VV |
359 | const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, |
360 | char *name); | |
f979b13c | 361 | unsigned int pmem_sector_size(struct nd_namespace_common *ndns); |
a3901802 DW |
362 | void nvdimm_badblocks_populate(struct nd_region *nd_region, |
363 | struct badblocks *bb, const struct resource *res); | |
200c79da | 364 | #if IS_ENABLED(CONFIG_ND_CLAIM) |
ac515c08 DW |
365 | struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn, |
366 | struct resource *res, struct vmem_altmap *altmap); | |
200c79da DW |
367 | int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio); |
368 | void devm_nsio_disable(struct device *dev, struct nd_namespace_io *nsio); | |
369 | #else | |
ac515c08 DW |
370 | static inline struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn, |
371 | struct resource *res, struct vmem_altmap *altmap) | |
372 | { | |
373 | return ERR_PTR(-ENXIO); | |
374 | } | |
200c79da DW |
375 | static inline int devm_nsio_enable(struct device *dev, |
376 | struct nd_namespace_io *nsio) | |
377 | { | |
378 | return -ENXIO; | |
379 | } | |
380 | static inline void devm_nsio_disable(struct device *dev, | |
381 | struct nd_namespace_io *nsio) | |
382 | { | |
383 | } | |
384 | #endif | |
047fc8a1 | 385 | int nd_blk_region_init(struct nd_region *nd_region); |
e5ae3b25 | 386 | int nd_region_activate(struct nd_region *nd_region); |
f0dc089c DW |
387 | void __nd_iostat_start(struct bio *bio, unsigned long *start); |
388 | static inline bool nd_iostat_start(struct bio *bio, unsigned long *start) | |
389 | { | |
390 | struct gendisk *disk = bio->bi_bdev->bd_disk; | |
391 | ||
392 | if (!blk_queue_io_stat(disk->queue)) | |
393 | return false; | |
394 | ||
8d7c22ac TK |
395 | *start = jiffies; |
396 | generic_start_io_acct(bio_data_dir(bio), | |
397 | bio_sectors(bio), &disk->part0); | |
f0dc089c DW |
398 | return true; |
399 | } | |
8d7c22ac TK |
400 | static inline void nd_iostat_end(struct bio *bio, unsigned long start) |
401 | { | |
402 | struct gendisk *disk = bio->bi_bdev->bd_disk; | |
403 | ||
404 | generic_end_io_acct(bio_data_dir(bio), &disk->part0, start); | |
405 | } | |
200c79da DW |
406 | static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector, |
407 | unsigned int len) | |
408 | { | |
409 | if (bb->count) { | |
410 | sector_t first_bad; | |
411 | int num_bad; | |
412 | ||
413 | return !!badblocks_check(bb, sector, len / 512, &first_bad, | |
414 | &num_bad); | |
415 | } | |
416 | ||
417 | return false; | |
418 | } | |
047fc8a1 | 419 | resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk); |
6ec68954 | 420 | const u8 *nd_dev_to_uuid(struct device *dev); |
004f1afb | 421 | bool pmem_should_map_pages(struct device *dev); |
4d88a97a | 422 | #endif /* __ND_H__ */ |