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e6dfb2de DW |
1 | /* |
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 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
14 | #include <linux/device.h> | |
62232e45 | 15 | #include <linux/ndctl.h> |
e6dfb2de DW |
16 | #include <linux/slab.h> |
17 | #include <linux/io.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/mm.h> | |
20 | #include "nd-core.h" | |
21 | ||
22 | static DEFINE_IDA(dimm_ida); | |
23 | ||
24 | static void nvdimm_release(struct device *dev) | |
25 | { | |
26 | struct nvdimm *nvdimm = to_nvdimm(dev); | |
27 | ||
28 | ida_simple_remove(&dimm_ida, nvdimm->id); | |
29 | kfree(nvdimm); | |
30 | } | |
31 | ||
32 | static struct device_type nvdimm_device_type = { | |
33 | .name = "nvdimm", | |
34 | .release = nvdimm_release, | |
35 | }; | |
36 | ||
62232e45 | 37 | bool is_nvdimm(struct device *dev) |
e6dfb2de DW |
38 | { |
39 | return dev->type == &nvdimm_device_type; | |
40 | } | |
41 | ||
42 | struct nvdimm *to_nvdimm(struct device *dev) | |
43 | { | |
44 | struct nvdimm *nvdimm = container_of(dev, struct nvdimm, dev); | |
45 | ||
46 | WARN_ON(!is_nvdimm(dev)); | |
47 | return nvdimm; | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(to_nvdimm); | |
50 | ||
51 | const char *nvdimm_name(struct nvdimm *nvdimm) | |
52 | { | |
53 | return dev_name(&nvdimm->dev); | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(nvdimm_name); | |
56 | ||
57 | void *nvdimm_provider_data(struct nvdimm *nvdimm) | |
58 | { | |
62232e45 DW |
59 | if (nvdimm) |
60 | return nvdimm->provider_data; | |
61 | return NULL; | |
e6dfb2de DW |
62 | } |
63 | EXPORT_SYMBOL_GPL(nvdimm_provider_data); | |
64 | ||
62232e45 DW |
65 | static ssize_t commands_show(struct device *dev, |
66 | struct device_attribute *attr, char *buf) | |
67 | { | |
68 | struct nvdimm *nvdimm = to_nvdimm(dev); | |
69 | int cmd, len = 0; | |
70 | ||
71 | if (!nvdimm->dsm_mask) | |
72 | return sprintf(buf, "\n"); | |
73 | ||
74 | for_each_set_bit(cmd, nvdimm->dsm_mask, BITS_PER_LONG) | |
75 | len += sprintf(buf + len, "%s ", nvdimm_cmd_name(cmd)); | |
76 | len += sprintf(buf + len, "\n"); | |
77 | return len; | |
78 | } | |
79 | static DEVICE_ATTR_RO(commands); | |
80 | ||
81 | static struct attribute *nvdimm_attributes[] = { | |
82 | &dev_attr_commands.attr, | |
83 | NULL, | |
84 | }; | |
85 | ||
86 | struct attribute_group nvdimm_attribute_group = { | |
87 | .attrs = nvdimm_attributes, | |
88 | }; | |
89 | EXPORT_SYMBOL_GPL(nvdimm_attribute_group); | |
90 | ||
e6dfb2de | 91 | struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data, |
62232e45 DW |
92 | const struct attribute_group **groups, unsigned long flags, |
93 | unsigned long *dsm_mask) | |
e6dfb2de DW |
94 | { |
95 | struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL); | |
96 | struct device *dev; | |
97 | ||
98 | if (!nvdimm) | |
99 | return NULL; | |
100 | ||
101 | nvdimm->id = ida_simple_get(&dimm_ida, 0, 0, GFP_KERNEL); | |
102 | if (nvdimm->id < 0) { | |
103 | kfree(nvdimm); | |
104 | return NULL; | |
105 | } | |
106 | nvdimm->provider_data = provider_data; | |
107 | nvdimm->flags = flags; | |
62232e45 | 108 | nvdimm->dsm_mask = dsm_mask; |
e6dfb2de DW |
109 | |
110 | dev = &nvdimm->dev; | |
111 | dev_set_name(dev, "nmem%d", nvdimm->id); | |
112 | dev->parent = &nvdimm_bus->dev; | |
113 | dev->type = &nvdimm_device_type; | |
114 | dev->bus = &nvdimm_bus_type; | |
62232e45 | 115 | dev->devt = MKDEV(nvdimm_major, nvdimm->id); |
e6dfb2de DW |
116 | dev->groups = groups; |
117 | if (device_register(dev) != 0) { | |
118 | put_device(dev); | |
119 | return NULL; | |
120 | } | |
121 | ||
122 | return nvdimm; | |
123 | } | |
124 | EXPORT_SYMBOL_GPL(nvdimm_create); |