2 * libnvdimm - Non-volatile-memory Devices Subsystem
4 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of version 2 of the GNU General Public License as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 #ifndef __LIBNVDIMM_H__
16 #define __LIBNVDIMM_H__
17 #include <linux/kernel.h>
18 #include <linux/sizes.h>
19 #include <linux/types.h>
20 #include <linux/uuid.h>
21 #include <linux/spinlock.h>
23 struct badrange_entry {
26 struct list_head list;
30 struct list_head list;
35 /* when a dimm supports both PMEM and BLK access a label is required */
37 /* unarmed memory devices may not persist writes */
39 /* locked memory devices should not be accessed */
41 /* memory under security wipes should not be accessed */
42 NDD_SECURITY_OVERWRITE = 3,
43 /* tracking whether or not there is a pending device reference */
45 /* ignore / filter NSLABEL_FLAG_LOCAL for this DIMM, i.e. no aliasing */
48 /* need to set a limit somewhere, but yes, this is likely overkill */
49 ND_IOCTL_MAX_BUFLEN = SZ_4M,
51 ND_CMD_MAX_ENVELOPE = 256,
54 /* region flag indicating to direct-map persistent memory by default */
55 ND_REGION_PAGEMAP = 0,
57 * Platform ensures entire CPU store data path is flushed to pmem on
60 ND_REGION_PERSIST_CACHE = 1,
62 * Platform provides mechanisms to automatically flush outstanding
63 * write data from memory controler to pmem on system power loss.
66 ND_REGION_PERSIST_MEMCTRL = 2,
68 /* mark newly adjusted resources as requiring a label update */
69 DPA_RESOURCE_ADJUSTED = 1 << 0,
72 extern struct attribute_group nvdimm_bus_attribute_group;
73 extern struct attribute_group nvdimm_attribute_group;
74 extern struct attribute_group nd_device_attribute_group;
75 extern struct attribute_group nd_numa_attribute_group;
76 extern struct attribute_group nd_region_attribute_group;
77 extern struct attribute_group nd_mapping_attribute_group;
80 struct nvdimm_bus_descriptor;
81 typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
82 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
83 unsigned int buf_len, int *cmd_rc);
86 struct nvdimm_bus_descriptor {
87 const struct attribute_group **attr_groups;
88 unsigned long bus_dsm_mask;
89 unsigned long cmd_mask;
90 struct module *module;
92 struct device_node *of_node;
94 int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
95 int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
96 struct nvdimm *nvdimm, unsigned int cmd, void *data);
102 u32 in_sizes[ND_CMD_MAX_ELEM];
103 int out_sizes[ND_CMD_MAX_ELEM];
106 struct nd_interleave_set {
107 /* v1.1 definition of the interleave-set-cookie algorithm */
109 /* v1.2 definition of the interleave-set-cookie algorithm */
111 /* compatibility with initial buggy Linux implementation */
117 struct nd_mapping_desc {
118 struct nvdimm *nvdimm;
124 struct nd_region_desc {
125 struct resource *res;
126 struct nd_mapping_desc *mapping;
128 const struct attribute_group **attr_groups;
129 struct nd_interleave_set *nd_set;
134 struct device_node *of_node;
138 void *devm_nvdimm_memremap(struct device *dev, resource_size_t offset,
139 size_t size, unsigned long flags);
140 static inline void __iomem *devm_nvdimm_ioremap(struct device *dev,
141 resource_size_t offset, size_t size)
143 return (void __iomem *) devm_nvdimm_memremap(dev, offset, size, 0);
149 struct nd_blk_region;
150 struct nd_blk_region_desc {
151 int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
152 int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
153 void *iobuf, u64 len, int rw);
154 struct nd_region_desc ndr_desc;
157 static inline struct nd_blk_region_desc *to_blk_region_desc(
158 struct nd_region_desc *ndr_desc)
160 return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);
164 enum nvdimm_security_state {
165 NVDIMM_SECURITY_ERROR = -1,
166 NVDIMM_SECURITY_DISABLED,
167 NVDIMM_SECURITY_UNLOCKED,
168 NVDIMM_SECURITY_LOCKED,
169 NVDIMM_SECURITY_FROZEN,
170 NVDIMM_SECURITY_OVERWRITE,
173 #define NVDIMM_PASSPHRASE_LEN 32
174 #define NVDIMM_KEY_DESC_LEN 22
176 struct nvdimm_key_data {
177 u8 data[NVDIMM_PASSPHRASE_LEN];
180 enum nvdimm_passphrase_type {
185 struct nvdimm_security_ops {
186 enum nvdimm_security_state (*state)(struct nvdimm *nvdimm,
187 enum nvdimm_passphrase_type pass_type);
188 int (*freeze)(struct nvdimm *nvdimm);
189 int (*change_key)(struct nvdimm *nvdimm,
190 const struct nvdimm_key_data *old_data,
191 const struct nvdimm_key_data *new_data,
192 enum nvdimm_passphrase_type pass_type);
193 int (*unlock)(struct nvdimm *nvdimm,
194 const struct nvdimm_key_data *key_data);
195 int (*disable)(struct nvdimm *nvdimm,
196 const struct nvdimm_key_data *key_data);
197 int (*erase)(struct nvdimm *nvdimm,
198 const struct nvdimm_key_data *key_data,
199 enum nvdimm_passphrase_type pass_type);
200 int (*overwrite)(struct nvdimm *nvdimm,
201 const struct nvdimm_key_data *key_data);
202 int (*query_overwrite)(struct nvdimm *nvdimm);
205 void badrange_init(struct badrange *badrange);
206 int badrange_add(struct badrange *badrange, u64 addr, u64 length);
207 void badrange_forget(struct badrange *badrange, phys_addr_t start,
209 int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr,
211 struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
212 struct nvdimm_bus_descriptor *nfit_desc);
213 void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
214 struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
215 struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm);
216 struct nvdimm *to_nvdimm(struct device *dev);
217 struct nd_region *to_nd_region(struct device *dev);
218 struct device *nd_region_dev(struct nd_region *nd_region);
219 struct nd_blk_region *to_nd_blk_region(struct device *dev);
220 struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
221 struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus);
222 const char *nvdimm_name(struct nvdimm *nvdimm);
223 struct kobject *nvdimm_kobj(struct nvdimm *nvdimm);
224 unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
225 void *nvdimm_provider_data(struct nvdimm *nvdimm);
226 struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
227 void *provider_data, const struct attribute_group **groups,
228 unsigned long flags, unsigned long cmd_mask, int num_flush,
229 struct resource *flush_wpq, const char *dimm_id,
230 const struct nvdimm_security_ops *sec_ops);
231 static inline struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus,
232 void *provider_data, const struct attribute_group **groups,
233 unsigned long flags, unsigned long cmd_mask, int num_flush,
234 struct resource *flush_wpq)
236 return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
237 cmd_mask, num_flush, flush_wpq, NULL, NULL);
240 const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
241 const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
242 u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
243 const struct nd_cmd_desc *desc, int idx, void *buf);
244 u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
245 const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
246 const u32 *out_field, unsigned long remainder);
247 int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
248 struct nd_region *nvdimm_pmem_region_create(struct nvdimm_bus *nvdimm_bus,
249 struct nd_region_desc *ndr_desc);
250 struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus,
251 struct nd_region_desc *ndr_desc);
252 struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus,
253 struct nd_region_desc *ndr_desc);
254 void *nd_region_provider_data(struct nd_region *nd_region);
255 void *nd_blk_region_provider_data(struct nd_blk_region *ndbr);
256 void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data);
257 struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr);
258 unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr);
259 unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
260 void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
261 u64 nd_fletcher64(void *addr, size_t len, bool le);
262 void nvdimm_flush(struct nd_region *nd_region);
263 int nvdimm_has_flush(struct nd_region *nd_region);
264 int nvdimm_has_cache(struct nd_region *nd_region);
265 int nvdimm_in_overwrite(struct nvdimm *nvdimm);
267 static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
268 unsigned int buf_len, int *cmd_rc)
270 struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
271 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
273 return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
276 #ifdef CONFIG_ARCH_HAS_PMEM_API
277 #define ARCH_MEMREMAP_PMEM MEMREMAP_WB
278 void arch_wb_cache_pmem(void *addr, size_t size);
279 void arch_invalidate_pmem(void *addr, size_t size);
281 #define ARCH_MEMREMAP_PMEM MEMREMAP_WT
282 static inline void arch_wb_cache_pmem(void *addr, size_t size)
285 static inline void arch_invalidate_pmem(void *addr, size_t size)
290 #endif /* __LIBNVDIMM_H__ */