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.
13 #ifndef __LINUX_ND_H__
14 #define __LINUX_ND_H__
16 #include <linux/ndctl.h>
17 #include <linux/device.h>
18 #include <linux/badblocks.h>
21 NVDIMM_REVALIDATE_POISON
,
24 struct nd_device_driver
{
25 struct device_driver drv
;
27 int (*probe
)(struct device
*dev
);
28 int (*remove
)(struct device
*dev
);
29 void (*shutdown
)(struct device
*dev
);
30 void (*notify
)(struct device
*dev
, enum nvdimm_event event
);
33 static inline struct nd_device_driver
*to_nd_device_driver(
34 struct device_driver
*drv
)
36 return container_of(drv
, struct nd_device_driver
, drv
);
40 * struct nd_namespace_common - core infrastructure of a namespace
41 * @force_raw: ignore other personalities for the namespace (e.g. btt)
42 * @dev: device model node
43 * @claim: when set a another personality has taken ownership of the namespace
44 * @rw_bytes: access the raw namespace capacity with byte-aligned transfers
46 struct nd_namespace_common
{
50 int (*rw_bytes
)(struct nd_namespace_common
*, resource_size_t offset
,
51 void *buf
, size_t size
, int rw
);
54 static inline struct nd_namespace_common
*to_ndns(struct device
*dev
)
56 return container_of(dev
, struct nd_namespace_common
, dev
);
60 * struct nd_namespace_io - device representation of a persistent memory range
61 * @dev: namespace device created by the nd region driver
62 * @res: struct resource conversion of a NFIT SPA table
63 * @size: cached resource_size(@res) for fast path size checks
64 * @addr: virtual address to access the namespace range
65 * @bb: badblocks list for the namespace range
67 struct nd_namespace_io
{
68 struct nd_namespace_common common
;
76 * struct nd_namespace_pmem - namespace device for dimm-backed interleaved memory
77 * @nsio: device and system physical address range to drive
78 * @alt_name: namespace name supplied in the dimm label
79 * @uuid: namespace name supplied in the dimm label
81 struct nd_namespace_pmem
{
82 struct nd_namespace_io nsio
;
88 * struct nd_namespace_blk - namespace for dimm-bounded persistent memory
89 * @alt_name: namespace name supplied in the dimm label
90 * @uuid: namespace name supplied in the dimm label
91 * @id: ida allocated id
92 * @lbasize: blk namespaces have a native sector size when btt not present
93 * @size: sum of all the resource ranges allocated to this namespace
94 * @num_resources: number of dpa extents to claim
95 * @res: discontiguous dpa extents for given dimm
97 struct nd_namespace_blk
{
98 struct nd_namespace_common common
;
102 unsigned long lbasize
;
103 resource_size_t size
;
105 struct resource
**res
;
108 static inline struct nd_namespace_io
*to_nd_namespace_io(struct device
*dev
)
110 return container_of(dev
, struct nd_namespace_io
, common
.dev
);
113 static inline struct nd_namespace_pmem
*to_nd_namespace_pmem(struct device
*dev
)
115 struct nd_namespace_io
*nsio
= to_nd_namespace_io(dev
);
117 return container_of(nsio
, struct nd_namespace_pmem
, nsio
);
120 static inline struct nd_namespace_blk
*to_nd_namespace_blk(struct device
*dev
)
122 return container_of(dev
, struct nd_namespace_blk
, common
.dev
);
126 * nvdimm_read_bytes() - synchronously read bytes from an nvdimm namespace
127 * @ndns: device to read
128 * @offset: namespace-relative starting offset
129 * @buf: buffer to fill
130 * @size: transfer length
132 * @buf is up-to-date upon return from this routine.
134 static inline int nvdimm_read_bytes(struct nd_namespace_common
*ndns
,
135 resource_size_t offset
, void *buf
, size_t size
)
137 return ndns
->rw_bytes(ndns
, offset
, buf
, size
, READ
);
141 * nvdimm_write_bytes() - synchronously write bytes to an nvdimm namespace
142 * @ndns: device to read
143 * @offset: namespace-relative starting offset
144 * @buf: buffer to drain
145 * @size: transfer length
147 * NVDIMM Namepaces disks do not implement sectors internally. Depending on
148 * the @ndns, the contents of @buf may be in cpu cache, platform buffers,
149 * or on backing memory media upon return from this routine. Flushing
150 * to media is handled internal to the @ndns driver, if at all.
152 static inline int nvdimm_write_bytes(struct nd_namespace_common
*ndns
,
153 resource_size_t offset
, void *buf
, size_t size
)
155 return ndns
->rw_bytes(ndns
, offset
, buf
, size
, WRITE
);
158 #define MODULE_ALIAS_ND_DEVICE(type) \
159 MODULE_ALIAS("nd:t" __stringify(type) "*")
160 #define ND_DEVICE_MODALIAS_FMT "nd:t%d"
163 void nvdimm_region_notify(struct nd_region
*nd_region
, enum nvdimm_event event
);
164 int __must_check
__nd_driver_register(struct nd_device_driver
*nd_drv
,
165 struct module
*module
, const char *mod_name
);
166 #define nd_driver_register(driver) \
167 __nd_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
168 #endif /* __LINUX_ND_H__ */