blob: 83e5d09350123bceab6c02d63c122567df7d8ca4 [file] [log] [blame]
Dan Williams4d88a972015-05-31 14:41:48 -04001/*
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__
Dan Williams1f7df6f2015-06-09 20:13:14 -040015#include <linux/libnvdimm.h>
Dan Williamsf0dc0892015-05-16 12:28:53 -040016#include <linux/blkdev.h>
Dan Williams4d88a972015-05-31 14:41:48 -040017#include <linux/device.h>
18#include <linux/mutex.h>
19#include <linux/ndctl.h>
Dan Williamsbf9bccc2015-06-17 17:14:46 -040020#include <linux/types.h>
Dan Williams4a826c82015-06-09 16:09:36 -040021#include "label.h"
Dan Williams4d88a972015-05-31 14:41:48 -040022
Dan Williams8c2f7e82015-06-25 04:20:04 -040023enum {
Vishal Verma5212e112015-06-25 04:20:32 -040024 /*
25 * Limits the maximum number of block apertures a dimm can
26 * support and is an input to the geometry/on-disk-format of a
27 * BTT instance
28 */
29 ND_MAX_LANES = 256,
Dan Williams8c2f7e82015-06-25 04:20:04 -040030 SECTOR_SHIFT = 9,
Vishal Vermafcae6952015-06-25 04:22:39 -040031 INT_LBASIZE_ALIGNMENT = 64,
Dan Williamse1455742015-07-30 17:57:47 -040032#if IS_ENABLED(CONFIG_NVDIMM_PFN)
33 ND_PFN_ALIGN = PAGES_PER_SECTION * PAGE_SIZE,
34 ND_PFN_MASK = ND_PFN_ALIGN - 1,
35#else
36 ND_PFN_ALIGN = 0,
37 ND_PFN_MASK = 0,
38#endif
Dan Williams8c2f7e82015-06-25 04:20:04 -040039};
40
Dan Williams4d88a972015-05-31 14:41:48 -040041struct nvdimm_drvdata {
42 struct device *dev;
Dan Williams4a826c82015-06-09 16:09:36 -040043 int nsindex_size;
Dan Williams4d88a972015-05-31 14:41:48 -040044 struct nd_cmd_get_config_size nsarea;
45 void *data;
Dan Williams4a826c82015-06-09 16:09:36 -040046 int ns_current, ns_next;
47 struct resource dpa;
Dan Williamsbf9bccc2015-06-17 17:14:46 -040048 struct kref kref;
Dan Williams4d88a972015-05-31 14:41:48 -040049};
50
Dan Williams3d880022015-05-31 15:02:11 -040051struct nd_region_namespaces {
52 int count;
53 int active;
54};
55
Dan Williams4a826c82015-06-09 16:09:36 -040056static inline struct nd_namespace_index *to_namespace_index(
57 struct nvdimm_drvdata *ndd, int i)
58{
59 if (i < 0)
60 return NULL;
61
62 return ndd->data + sizeof_namespace_index(ndd) * i;
63}
64
65static inline struct nd_namespace_index *to_current_namespace_index(
66 struct nvdimm_drvdata *ndd)
67{
68 return to_namespace_index(ndd, ndd->ns_current);
69}
70
71static inline struct nd_namespace_index *to_next_namespace_index(
72 struct nvdimm_drvdata *ndd)
73{
74 return to_namespace_index(ndd, ndd->ns_next);
75}
76
77#define nd_dbg_dpa(r, d, res, fmt, arg...) \
78 dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
79 (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
80 (unsigned long long) (res ? resource_size(res) : 0), \
81 (unsigned long long) (res ? res->start : 0), ##arg)
82
Dan Williamsbf9bccc2015-06-17 17:14:46 -040083#define for_each_label(l, label, labels) \
84 for (l = 0; (label = labels ? labels[l] : NULL); l++)
85
86#define for_each_dpa_resource(ndd, res) \
87 for (res = (ndd)->dpa.child; res; res = res->sibling)
88
Dan Williams4a826c82015-06-09 16:09:36 -040089#define for_each_dpa_resource_safe(ndd, res, next) \
90 for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
91 res; res = next, next = next ? next->sibling : NULL)
92
Vishal Verma5212e112015-06-25 04:20:32 -040093struct nd_percpu_lane {
94 int count;
95 spinlock_t lock;
96};
97
Dan Williams1f7df6f2015-06-09 20:13:14 -040098struct nd_region {
99 struct device dev;
Dan Williams1b40e092015-05-01 13:34:01 -0400100 struct ida ns_ida;
Dan Williams8c2f7e82015-06-25 04:20:04 -0400101 struct ida btt_ida;
Dan Williamse1455742015-07-30 17:57:47 -0400102 struct ida pfn_ida;
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400103 struct device *ns_seed;
Dan Williams8c2f7e82015-06-25 04:20:04 -0400104 struct device *btt_seed;
Dan Williamse1455742015-07-30 17:57:47 -0400105 struct device *pfn_seed;
Dan Williams1f7df6f2015-06-09 20:13:14 -0400106 u16 ndr_mappings;
107 u64 ndr_size;
108 u64 ndr_start;
Toshi Kani41d7a6d2015-06-19 12:18:33 -0600109 int id, num_lanes, ro, numa_node;
Dan Williams1f7df6f2015-06-09 20:13:14 -0400110 void *provider_data;
Dan Williamseaf96152015-05-01 13:11:27 -0400111 struct nd_interleave_set *nd_set;
Vishal Verma5212e112015-06-25 04:20:32 -0400112 struct nd_percpu_lane __percpu *lane;
Dan Williams1f7df6f2015-06-09 20:13:14 -0400113 struct nd_mapping mapping[0];
114};
115
Ross Zwisler047fc8a2015-06-25 04:21:02 -0400116struct nd_blk_region {
117 int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
118 void (*disable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
119 int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
120 void *iobuf, u64 len, int rw);
121 void *blk_provider_data;
122 struct nd_region nd_region;
123};
124
Dan Williams4a826c82015-06-09 16:09:36 -0400125/*
126 * Lookup next in the repeating sequence of 01, 10, and 11.
127 */
128static inline unsigned nd_inc_seq(unsigned seq)
129{
130 static const unsigned next[] = { 0, 2, 3, 1 };
131
132 return next[seq & 3];
133}
Dan Williamsf524bf22015-05-30 12:36:02 -0400134
Vishal Verma5212e112015-06-25 04:20:32 -0400135struct btt;
Dan Williams8c2f7e82015-06-25 04:20:04 -0400136struct nd_btt {
137 struct device dev;
138 struct nd_namespace_common *ndns;
Vishal Verma5212e112015-06-25 04:20:32 -0400139 struct btt *btt;
Dan Williams8c2f7e82015-06-25 04:20:04 -0400140 unsigned long lbasize;
141 u8 *uuid;
142 int id;
143};
144
Dan Williamse1455742015-07-30 17:57:47 -0400145enum nd_pfn_mode {
146 PFN_MODE_NONE,
147 PFN_MODE_RAM,
148 PFN_MODE_PMEM,
149};
150
151struct nd_pfn {
152 int id;
153 u8 *uuid;
154 struct device dev;
155 unsigned long npfns;
156 enum nd_pfn_mode mode;
157 struct nd_pfn_sb *pfn_sb;
158 struct nd_namespace_common *ndns;
159};
160
Dan Williams4d88a972015-05-31 14:41:48 -0400161enum nd_async_mode {
162 ND_SYNC,
163 ND_ASYNC,
164};
165
Vishal Verma41cd8b72015-06-25 04:21:52 -0400166int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400167void wait_nvdimm_bus_probe_idle(struct device *dev);
Dan Williams4d88a972015-05-31 14:41:48 -0400168void nd_device_register(struct device *dev);
169void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400170int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
171 size_t len);
Dan Williams1b40e092015-05-01 13:34:01 -0400172ssize_t nd_sector_size_show(unsigned long current_lbasize,
173 const unsigned long *supported, char *buf);
174ssize_t nd_sector_size_store(struct device *dev, const char *buf,
175 unsigned long *current_lbasize, const unsigned long *supported);
Dan Williams4d88a972015-05-31 14:41:48 -0400176int __init nvdimm_init(void);
Dan Williams3d880022015-05-31 15:02:11 -0400177int __init nd_region_init(void);
Dan Williams4d88a972015-05-31 14:41:48 -0400178void nvdimm_exit(void);
Dan Williams3d880022015-05-31 15:02:11 -0400179void nd_region_exit(void);
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400180struct nvdimm;
181struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
Dan Williams4d88a972015-05-31 14:41:48 -0400182int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
183int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
Dan Williamsf524bf22015-05-30 12:36:02 -0400184int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
185 void *buf, size_t len);
Dan Williams8c2f7e82015-06-25 04:20:04 -0400186struct nd_btt *to_nd_btt(struct device *dev);
Dan Williamse1455742015-07-30 17:57:47 -0400187
188struct nd_gen_sb {
189 char reserved[SZ_4K - 8];
190 __le64 checksum;
191};
192
193u64 nd_sb_checksum(struct nd_gen_sb *sb);
Dan Williams8c2f7e82015-06-25 04:20:04 -0400194#if IS_ENABLED(CONFIG_BTT)
195int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata);
196bool is_nd_btt(struct device *dev);
197struct device *nd_btt_create(struct nd_region *nd_region);
198#else
Randy Dunlapf6ef5a22015-07-28 12:27:01 -0700199static inline int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata)
Dan Williams8c2f7e82015-06-25 04:20:04 -0400200{
201 return -ENODEV;
202}
203
204static inline bool is_nd_btt(struct device *dev)
205{
206 return false;
207}
208
209static inline struct device *nd_btt_create(struct nd_region *nd_region)
210{
211 return NULL;
212}
Dan Williams8c2f7e82015-06-25 04:20:04 -0400213#endif
Dan Williamse1455742015-07-30 17:57:47 -0400214
215struct nd_pfn *to_nd_pfn(struct device *dev);
216#if IS_ENABLED(CONFIG_NVDIMM_PFN)
217int nd_pfn_probe(struct nd_namespace_common *ndns, void *drvdata);
218bool is_nd_pfn(struct device *dev);
219struct device *nd_pfn_create(struct nd_region *nd_region);
Dan Williams32ab0a3f2015-08-01 02:16:37 -0400220int nd_pfn_validate(struct nd_pfn *nd_pfn);
Dan Williamse1455742015-07-30 17:57:47 -0400221#else
222static inline int nd_pfn_probe(struct nd_namespace_common *ndns, void *drvdata)
223{
224 return -ENODEV;
225}
226
227static inline bool is_nd_pfn(struct device *dev)
228{
229 return false;
230}
231
232static inline struct device *nd_pfn_create(struct nd_region *nd_region)
233{
234 return NULL;
235}
Dan Williams32ab0a3f2015-08-01 02:16:37 -0400236
237static inline int nd_pfn_validate(struct nd_pfn *nd_pfn)
238{
239 return -ENODEV;
240}
Dan Williamse1455742015-07-30 17:57:47 -0400241#endif
242
Dan Williams3d880022015-05-31 15:02:11 -0400243struct nd_region *to_nd_region(struct device *dev);
244int nd_region_to_nstype(struct nd_region *nd_region);
245int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400246u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
Dan Williams3d880022015-05-31 15:02:11 -0400247void nvdimm_bus_lock(struct device *dev);
248void nvdimm_bus_unlock(struct device *dev);
249bool is_nvdimm_bus_locked(struct device *dev);
Dan Williams58138822015-06-23 20:08:34 -0400250int nvdimm_revalidate_disk(struct gendisk *disk);
Dan Williamsbf9bccc2015-06-17 17:14:46 -0400251void nvdimm_drvdata_release(struct kref *kref);
252void put_ndd(struct nvdimm_drvdata *ndd);
Dan Williams4a826c82015-06-09 16:09:36 -0400253int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
254void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
255struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
256 struct nd_label_id *label_id, resource_size_t start,
257 resource_size_t n);
Dan Williams8c2f7e82015-06-25 04:20:04 -0400258resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
259struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
Vishal Verma5212e112015-06-25 04:20:32 -0400260int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
261int nvdimm_namespace_detach_btt(struct nd_namespace_common *ndns);
262const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
263 char *name);
Ross Zwisler047fc8a2015-06-25 04:21:02 -0400264int nd_blk_region_init(struct nd_region *nd_region);
Dan Williamsf0dc0892015-05-16 12:28:53 -0400265void __nd_iostat_start(struct bio *bio, unsigned long *start);
266static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
267{
268 struct gendisk *disk = bio->bi_bdev->bd_disk;
269
270 if (!blk_queue_io_stat(disk->queue))
271 return false;
272
273 __nd_iostat_start(bio, start);
274 return true;
275}
276void nd_iostat_end(struct bio *bio, unsigned long start);
Ross Zwisler047fc8a2015-06-25 04:21:02 -0400277resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
Vishal Verma6ec68952015-07-29 14:58:09 -0600278const u8 *nd_dev_to_uuid(struct device *dev);
Dan Williams4d88a972015-05-31 14:41:48 -0400279#endif /* __ND_H__ */