2 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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.
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.
15 #include <linux/libnvdimm.h>
16 #include <linux/badblocks.h>
17 #include <linux/blkdev.h>
18 #include <linux/device.h>
19 #include <linux/mutex.h>
20 #include <linux/ndctl.h>
21 #include <linux/types.h>
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
33 INT_LBASIZE_ALIGNMENT = 64,
39 struct list_head list;
42 struct nvdimm_drvdata {
45 struct nd_cmd_get_config_size nsarea;
47 int ns_current, ns_next;
52 struct nd_region_data {
55 unsigned int hints_shift;
56 void __iomem *flush_wpq[0];
59 static inline void __iomem *ndrd_get_flush_wpq(struct nd_region_data *ndrd,
62 unsigned int num = 1 << ndrd->hints_shift;
63 unsigned int mask = num - 1;
65 return ndrd->flush_wpq[dimm * num + (hint & mask)];
68 static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm,
69 int hint, void __iomem *flush)
71 unsigned int num = 1 << ndrd->hints_shift;
72 unsigned int mask = num - 1;
74 ndrd->flush_wpq[dimm * num + (hint & mask)] = flush;
77 static inline struct nd_namespace_index *to_namespace_index(
78 struct nvdimm_drvdata *ndd, int i)
83 return ndd->data + sizeof_namespace_index(ndd) * i;
86 static inline struct nd_namespace_index *to_current_namespace_index(
87 struct nvdimm_drvdata *ndd)
89 return to_namespace_index(ndd, ndd->ns_current);
92 static inline struct nd_namespace_index *to_next_namespace_index(
93 struct nvdimm_drvdata *ndd)
95 return to_namespace_index(ndd, ndd->ns_next);
98 #define nd_dbg_dpa(r, d, res, fmt, arg...) \
99 dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
100 (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
101 (unsigned long long) (res ? resource_size(res) : 0), \
102 (unsigned long long) (res ? res->start : 0), ##arg)
104 #define for_each_label(l, label, labels) \
105 for (l = 0; (label = labels ? labels[l] : NULL); l++)
107 #define for_each_dpa_resource(ndd, res) \
108 for (res = (ndd)->dpa.child; res; res = res->sibling)
110 #define for_each_dpa_resource_safe(ndd, res, next) \
111 for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
112 res; res = next, next = next ? next->sibling : NULL)
114 struct nd_percpu_lane {
126 struct device *ns_seed;
127 struct device *btt_seed;
128 struct device *pfn_seed;
129 struct device *dax_seed;
133 int id, num_lanes, ro, numa_node;
135 struct nd_interleave_set *nd_set;
136 struct nd_percpu_lane __percpu *lane;
137 struct nd_mapping mapping[0];
140 struct nd_blk_region {
141 int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
142 int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
143 void *iobuf, u64 len, int rw);
144 void *blk_provider_data;
145 struct nd_region nd_region;
149 * Lookup next in the repeating sequence of 01, 10, and 11.
151 static inline unsigned nd_inc_seq(unsigned seq)
153 static const unsigned next[] = { 0, 2, 3, 1 };
155 return next[seq & 3];
161 struct nd_namespace_common *ndns;
163 unsigned long lbasize;
181 enum nd_pfn_mode mode;
182 struct nd_pfn_sb *pfn_sb;
183 struct nd_namespace_common *ndns;
187 struct nd_pfn nd_pfn;
195 int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
196 void wait_nvdimm_bus_probe_idle(struct device *dev);
197 void nd_device_register(struct device *dev);
198 void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
199 void nd_device_notify(struct device *dev, enum nvdimm_event event);
200 int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
202 ssize_t nd_sector_size_show(unsigned long current_lbasize,
203 const unsigned long *supported, char *buf);
204 ssize_t nd_sector_size_store(struct device *dev, const char *buf,
205 unsigned long *current_lbasize, const unsigned long *supported);
206 int __init nvdimm_init(void);
207 int __init nd_region_init(void);
208 void nvdimm_exit(void);
209 void nd_region_exit(void);
211 struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
212 int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
213 int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
214 int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
215 void *buf, size_t len);
216 long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
218 struct nd_btt *to_nd_btt(struct device *dev);
221 char reserved[SZ_4K - 8];
225 u64 nd_sb_checksum(struct nd_gen_sb *sb);
226 #if IS_ENABLED(CONFIG_BTT)
227 int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns);
228 bool is_nd_btt(struct device *dev);
229 struct device *nd_btt_create(struct nd_region *nd_region);
231 static inline int nd_btt_probe(struct device *dev,
232 struct nd_namespace_common *ndns)
237 static inline bool is_nd_btt(struct device *dev)
242 static inline struct device *nd_btt_create(struct nd_region *nd_region)
248 struct nd_pfn *to_nd_pfn(struct device *dev);
249 #if IS_ENABLED(CONFIG_NVDIMM_PFN)
250 int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns);
251 bool is_nd_pfn(struct device *dev);
252 struct device *nd_pfn_create(struct nd_region *nd_region);
253 struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn,
254 struct nd_namespace_common *ndns);
255 int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig);
256 extern struct attribute_group nd_pfn_attribute_group;
258 static inline int nd_pfn_probe(struct device *dev,
259 struct nd_namespace_common *ndns)
264 static inline bool is_nd_pfn(struct device *dev)
269 static inline struct device *nd_pfn_create(struct nd_region *nd_region)
274 static inline int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
280 struct nd_dax *to_nd_dax(struct device *dev);
281 #if IS_ENABLED(CONFIG_NVDIMM_DAX)
282 int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns);
283 bool is_nd_dax(struct device *dev);
284 struct device *nd_dax_create(struct nd_region *nd_region);
286 static inline int nd_dax_probe(struct device *dev,
287 struct nd_namespace_common *ndns)
292 static inline bool is_nd_dax(struct device *dev)
297 static inline struct device *nd_dax_create(struct nd_region *nd_region)
303 struct nd_region *to_nd_region(struct device *dev);
304 int nd_region_to_nstype(struct nd_region *nd_region);
305 int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
306 u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
307 void nvdimm_bus_lock(struct device *dev);
308 void nvdimm_bus_unlock(struct device *dev);
309 bool is_nvdimm_bus_locked(struct device *dev);
310 int nvdimm_revalidate_disk(struct gendisk *disk);
311 void nvdimm_drvdata_release(struct kref *kref);
312 void put_ndd(struct nvdimm_drvdata *ndd);
313 int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
314 void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
315 struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
316 struct nd_label_id *label_id, resource_size_t start,
318 resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
319 struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
320 int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
321 int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
322 const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
324 void nvdimm_badblocks_populate(struct nd_region *nd_region,
325 struct badblocks *bb, const struct resource *res);
326 #if IS_ENABLED(CONFIG_ND_CLAIM)
327 struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
328 struct resource *res, struct vmem_altmap *altmap);
329 int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio);
330 void devm_nsio_disable(struct device *dev, struct nd_namespace_io *nsio);
332 static inline struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
333 struct resource *res, struct vmem_altmap *altmap)
335 return ERR_PTR(-ENXIO);
337 static inline int devm_nsio_enable(struct device *dev,
338 struct nd_namespace_io *nsio)
342 static inline void devm_nsio_disable(struct device *dev,
343 struct nd_namespace_io *nsio)
347 int nd_blk_region_init(struct nd_region *nd_region);
348 int nd_region_activate(struct nd_region *nd_region);
349 void __nd_iostat_start(struct bio *bio, unsigned long *start);
350 static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
352 struct gendisk *disk = bio->bi_bdev->bd_disk;
354 if (!blk_queue_io_stat(disk->queue))
357 __nd_iostat_start(bio, start);
360 void nd_iostat_end(struct bio *bio, unsigned long start);
361 static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
368 return !!badblocks_check(bb, sector, len / 512, &first_bad,
374 resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
375 const u8 *nd_dev_to_uuid(struct device *dev);
376 bool pmem_should_map_pages(struct device *dev);
377 #endif /* __ND_H__ */