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>
22 /* when a dimm supports both PMEM and BLK access a label is required */
23 NDD_ALIASING = 1 << 0,
24 /* unarmed memory devices may not persist writes */
27 /* need to set a limit somewhere, but yes, this is likely overkill */
28 ND_IOCTL_MAX_BUFLEN = SZ_4M,
30 ND_CMD_MAX_ENVELOPE = 256,
33 /* region flag indicating to direct-map persistent memory by default */
34 ND_REGION_PAGEMAP = 0,
36 /* mark newly adjusted resources as requiring a label update */
37 DPA_RESOURCE_ADJUSTED = 1 << 0,
40 extern struct attribute_group nvdimm_bus_attribute_group;
41 extern struct attribute_group nvdimm_attribute_group;
42 extern struct attribute_group nd_device_attribute_group;
43 extern struct attribute_group nd_numa_attribute_group;
44 extern struct attribute_group nd_region_attribute_group;
45 extern struct attribute_group nd_mapping_attribute_group;
48 struct nvdimm_bus_descriptor;
49 typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
50 struct nvdimm *nvdimm, unsigned int cmd, void *buf,
51 unsigned int buf_len, int *cmd_rc);
53 struct nvdimm_bus_descriptor {
54 const struct attribute_group **attr_groups;
55 unsigned long cmd_mask;
56 struct module *module;
59 int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
60 int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
61 struct nvdimm *nvdimm, unsigned int cmd);
67 u32 in_sizes[ND_CMD_MAX_ELEM];
68 int out_sizes[ND_CMD_MAX_ELEM];
71 struct nd_interleave_set {
73 /* compatibility with initial buggy Linux implementation */
77 struct nd_mapping_desc {
78 struct nvdimm *nvdimm;
83 struct nd_region_desc {
85 struct nd_mapping_desc *mapping;
87 const struct attribute_group **attr_groups;
88 struct nd_interleave_set *nd_set;
96 void *devm_nvdimm_memremap(struct device *dev, resource_size_t offset,
97 size_t size, unsigned long flags);
98 static inline void __iomem *devm_nvdimm_ioremap(struct device *dev,
99 resource_size_t offset, size_t size)
101 return (void __iomem *) devm_nvdimm_memremap(dev, offset, size, 0);
107 struct nd_blk_region;
108 struct nd_blk_region_desc {
109 int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
110 int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
111 void *iobuf, u64 len, int rw);
112 struct nd_region_desc ndr_desc;
115 static inline struct nd_blk_region_desc *to_blk_region_desc(
116 struct nd_region_desc *ndr_desc)
118 return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);
122 int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length);
123 void nvdimm_clear_from_poison_list(struct nvdimm_bus *nvdimm_bus,
124 phys_addr_t start, unsigned int len);
125 struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
126 struct nvdimm_bus_descriptor *nfit_desc);
127 void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
128 struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
129 struct nvdimm *to_nvdimm(struct device *dev);
130 struct nd_region *to_nd_region(struct device *dev);
131 struct nd_blk_region *to_nd_blk_region(struct device *dev);
132 struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
133 struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus);
134 const char *nvdimm_name(struct nvdimm *nvdimm);
135 struct kobject *nvdimm_kobj(struct nvdimm *nvdimm);
136 unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
137 void *nvdimm_provider_data(struct nvdimm *nvdimm);
138 struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
139 const struct attribute_group **groups, unsigned long flags,
140 unsigned long cmd_mask, int num_flush,
141 struct resource *flush_wpq);
142 const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
143 const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
144 u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
145 const struct nd_cmd_desc *desc, int idx, void *buf);
146 u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
147 const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
148 const u32 *out_field, unsigned long remainder);
149 int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
150 struct nd_region *nvdimm_pmem_region_create(struct nvdimm_bus *nvdimm_bus,
151 struct nd_region_desc *ndr_desc);
152 struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus,
153 struct nd_region_desc *ndr_desc);
154 struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus,
155 struct nd_region_desc *ndr_desc);
156 void *nd_region_provider_data(struct nd_region *nd_region);
157 void *nd_blk_region_provider_data(struct nd_blk_region *ndbr);
158 void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data);
159 struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr);
160 unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
161 void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
162 u64 nd_fletcher64(void *addr, size_t len, bool le);
163 void nvdimm_flush(struct nd_region *nd_region);
164 int nvdimm_has_flush(struct nd_region *nd_region);
165 #endif /* __LIBNVDIMM_H__ */