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7#ifndef __LIBNVDIMM_H__
8#define __LIBNVDIMM_H__
9#include <linux/kernel.h>
10#include <linux/sizes.h>
11#include <linux/types.h>
12#include <linux/uuid.h>
13#include <linux/spinlock.h>
14#include <linux/bio.h>
15
16struct badrange_entry {
17 u64 start;
18 u64 length;
19 struct list_head list;
20};
21
22struct badrange {
23 struct list_head list;
24 spinlock_t lock;
25};
26
27enum {
28
29 NDD_ALIASING = 0,
30
31 NDD_UNARMED = 1,
32
33 NDD_LOCKED = 2,
34
35 NDD_SECURITY_OVERWRITE = 3,
36
37 NDD_WORK_PENDING = 4,
38
39 NDD_NOBLK = 5,
40
41 NDD_LABELING = 6,
42
43
44 ND_IOCTL_MAX_BUFLEN = SZ_4M,
45 ND_CMD_MAX_ELEM = 5,
46 ND_CMD_MAX_ENVELOPE = 256,
47 ND_MAX_MAPPINGS = 32,
48
49
50 ND_REGION_PAGEMAP = 0,
51
52
53
54
55 ND_REGION_PERSIST_CACHE = 1,
56
57
58
59
60
61 ND_REGION_PERSIST_MEMCTRL = 2,
62
63
64 ND_REGION_ASYNC = 3,
65
66
67 DPA_RESOURCE_ADJUSTED = 1 << 0,
68};
69
70struct nvdimm;
71struct nvdimm_bus_descriptor;
72typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
73 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
74 unsigned int buf_len, int *cmd_rc);
75
76struct device_node;
77struct nvdimm_bus_descriptor {
78 const struct attribute_group **attr_groups;
79 unsigned long cmd_mask;
80 unsigned long dimm_family_mask;
81 unsigned long bus_family_mask;
82 struct module *module;
83 char *provider_name;
84 struct device_node *of_node;
85 ndctl_fn ndctl;
86 int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
87 int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
88 struct nvdimm *nvdimm, unsigned int cmd, void *data);
89 const struct nvdimm_bus_fw_ops *fw_ops;
90};
91
92struct nd_cmd_desc {
93 int in_num;
94 int out_num;
95 u32 in_sizes[ND_CMD_MAX_ELEM];
96 int out_sizes[ND_CMD_MAX_ELEM];
97};
98
99struct nd_interleave_set {
100
101 u64 cookie1;
102
103 u64 cookie2;
104
105 u64 altcookie;
106
107 guid_t type_guid;
108};
109
110struct nd_mapping_desc {
111 struct nvdimm *nvdimm;
112 u64 start;
113 u64 size;
114 int position;
115};
116
117struct nd_region;
118struct nd_region_desc {
119 struct resource *res;
120 struct nd_mapping_desc *mapping;
121 u16 num_mappings;
122 const struct attribute_group **attr_groups;
123 struct nd_interleave_set *nd_set;
124 void *provider_data;
125 int num_lanes;
126 int numa_node;
127 int target_node;
128 unsigned long flags;
129 struct device_node *of_node;
130 int (*flush)(struct nd_region *nd_region, struct bio *bio);
131};
132
133struct device;
134void *devm_nvdimm_memremap(struct device *dev, resource_size_t offset,
135 size_t size, unsigned long flags);
136static inline void __iomem *devm_nvdimm_ioremap(struct device *dev,
137 resource_size_t offset, size_t size)
138{
139 return (void __iomem *) devm_nvdimm_memremap(dev, offset, size, 0);
140}
141
142struct nvdimm_bus;
143struct module;
144struct nd_blk_region;
145struct nd_blk_region_desc {
146 int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
147 int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
148 void *iobuf, u64 len, int rw);
149 struct nd_region_desc ndr_desc;
150};
151
152static inline struct nd_blk_region_desc *to_blk_region_desc(
153 struct nd_region_desc *ndr_desc)
154{
155 return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);
156
157}
158
159
160
161
162
163enum nvdimm_security_bits {
164 NVDIMM_SECURITY_DISABLED,
165 NVDIMM_SECURITY_UNLOCKED,
166 NVDIMM_SECURITY_LOCKED,
167 NVDIMM_SECURITY_FROZEN,
168 NVDIMM_SECURITY_OVERWRITE,
169};
170
171#define NVDIMM_PASSPHRASE_LEN 32
172#define NVDIMM_KEY_DESC_LEN 22
173
174struct nvdimm_key_data {
175 u8 data[NVDIMM_PASSPHRASE_LEN];
176};
177
178enum nvdimm_passphrase_type {
179 NVDIMM_USER,
180 NVDIMM_MASTER,
181};
182
183struct nvdimm_security_ops {
184 unsigned long (*get_flags)(struct nvdimm *nvdimm,
185 enum nvdimm_passphrase_type pass_type);
186 int (*freeze)(struct nvdimm *nvdimm);
187 int (*change_key)(struct nvdimm *nvdimm,
188 const struct nvdimm_key_data *old_data,
189 const struct nvdimm_key_data *new_data,
190 enum nvdimm_passphrase_type pass_type);
191 int (*unlock)(struct nvdimm *nvdimm,
192 const struct nvdimm_key_data *key_data);
193 int (*disable)(struct nvdimm *nvdimm,
194 const struct nvdimm_key_data *key_data);
195 int (*erase)(struct nvdimm *nvdimm,
196 const struct nvdimm_key_data *key_data,
197 enum nvdimm_passphrase_type pass_type);
198 int (*overwrite)(struct nvdimm *nvdimm,
199 const struct nvdimm_key_data *key_data);
200 int (*query_overwrite)(struct nvdimm *nvdimm);
201};
202
203enum nvdimm_fwa_state {
204 NVDIMM_FWA_INVALID,
205 NVDIMM_FWA_IDLE,
206 NVDIMM_FWA_ARMED,
207 NVDIMM_FWA_BUSY,
208 NVDIMM_FWA_ARM_OVERFLOW,
209};
210
211enum nvdimm_fwa_trigger {
212 NVDIMM_FWA_ARM,
213 NVDIMM_FWA_DISARM,
214};
215
216enum nvdimm_fwa_capability {
217 NVDIMM_FWA_CAP_INVALID,
218 NVDIMM_FWA_CAP_NONE,
219 NVDIMM_FWA_CAP_QUIESCE,
220 NVDIMM_FWA_CAP_LIVE,
221};
222
223enum nvdimm_fwa_result {
224 NVDIMM_FWA_RESULT_INVALID,
225 NVDIMM_FWA_RESULT_NONE,
226 NVDIMM_FWA_RESULT_SUCCESS,
227 NVDIMM_FWA_RESULT_NOTSTAGED,
228 NVDIMM_FWA_RESULT_NEEDRESET,
229 NVDIMM_FWA_RESULT_FAIL,
230};
231
232struct nvdimm_bus_fw_ops {
233 enum nvdimm_fwa_state (*activate_state)
234 (struct nvdimm_bus_descriptor *nd_desc);
235 enum nvdimm_fwa_capability (*capability)
236 (struct nvdimm_bus_descriptor *nd_desc);
237 int (*activate)(struct nvdimm_bus_descriptor *nd_desc);
238};
239
240struct nvdimm_fw_ops {
241 enum nvdimm_fwa_state (*activate_state)(struct nvdimm *nvdimm);
242 enum nvdimm_fwa_result (*activate_result)(struct nvdimm *nvdimm);
243 int (*arm)(struct nvdimm *nvdimm, enum nvdimm_fwa_trigger arg);
244};
245
246void badrange_init(struct badrange *badrange);
247int badrange_add(struct badrange *badrange, u64 addr, u64 length);
248void badrange_forget(struct badrange *badrange, phys_addr_t start,
249 unsigned int len);
250int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr,
251 u64 length);
252struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
253 struct nvdimm_bus_descriptor *nfit_desc);
254void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
255struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
256struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm);
257struct nvdimm *to_nvdimm(struct device *dev);
258struct nd_region *to_nd_region(struct device *dev);
259struct device *nd_region_dev(struct nd_region *nd_region);
260struct nd_blk_region *to_nd_blk_region(struct device *dev);
261struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
262struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus);
263const char *nvdimm_name(struct nvdimm *nvdimm);
264struct kobject *nvdimm_kobj(struct nvdimm *nvdimm);
265unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
266void *nvdimm_provider_data(struct nvdimm *nvdimm);
267struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
268 void *provider_data, const struct attribute_group **groups,
269 unsigned long flags, unsigned long cmd_mask, int num_flush,
270 struct resource *flush_wpq, const char *dimm_id,
271 const struct nvdimm_security_ops *sec_ops,
272 const struct nvdimm_fw_ops *fw_ops);
273static inline struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus,
274 void *provider_data, const struct attribute_group **groups,
275 unsigned long flags, unsigned long cmd_mask, int num_flush,
276 struct resource *flush_wpq)
277{
278 return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
279 cmd_mask, num_flush, flush_wpq, NULL, NULL, NULL);
280}
281void nvdimm_delete(struct nvdimm *nvdimm);
282
283const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
284const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
285u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
286 const struct nd_cmd_desc *desc, int idx, void *buf);
287u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
288 const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
289 const u32 *out_field, unsigned long remainder);
290int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
291struct nd_region *nvdimm_pmem_region_create(struct nvdimm_bus *nvdimm_bus,
292 struct nd_region_desc *ndr_desc);
293struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus,
294 struct nd_region_desc *ndr_desc);
295struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus,
296 struct nd_region_desc *ndr_desc);
297void *nd_region_provider_data(struct nd_region *nd_region);
298void *nd_blk_region_provider_data(struct nd_blk_region *ndbr);
299void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data);
300struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr);
301unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr);
302unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
303void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
304u64 nd_fletcher64(void *addr, size_t len, bool le);
305int nvdimm_flush(struct nd_region *nd_region, struct bio *bio);
306int generic_nvdimm_flush(struct nd_region *nd_region);
307int nvdimm_has_flush(struct nd_region *nd_region);
308int nvdimm_has_cache(struct nd_region *nd_region);
309int nvdimm_in_overwrite(struct nvdimm *nvdimm);
310bool is_nvdimm_sync(struct nd_region *nd_region);
311
312static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
313 unsigned int buf_len, int *cmd_rc)
314{
315 struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
316 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
317
318 return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
319}
320
321#ifdef CONFIG_ARCH_HAS_PMEM_API
322#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
323void arch_wb_cache_pmem(void *addr, size_t size);
324void arch_invalidate_pmem(void *addr, size_t size);
325#else
326#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
327static inline void arch_wb_cache_pmem(void *addr, size_t size)
328{
329}
330static inline void arch_invalidate_pmem(void *addr, size_t size)
331{
332}
333#endif
334
335#endif
336