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4d88a97a 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 | #include <linux/vmalloc.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/sizes.h> | |
17 | #include <linux/ndctl.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/nd.h> | |
4a826c83 | 21 | #include "label.h" |
4d88a97a DW |
22 | #include "nd.h" |
23 | ||
4d88a97a DW |
24 | static int nvdimm_probe(struct device *dev) |
25 | { | |
26 | struct nvdimm_drvdata *ndd; | |
27 | int rc; | |
28 | ||
aee65987 TK |
29 | rc = nvdimm_check_config_data(dev); |
30 | if (rc) { | |
31 | /* not required for non-aliased nvdimm, ex. NVDIMM-N */ | |
32 | if (rc == -ENOTTY) | |
33 | rc = 0; | |
34 | return rc; | |
35 | } | |
36 | ||
4d88a97a DW |
37 | ndd = kzalloc(sizeof(*ndd), GFP_KERNEL); |
38 | if (!ndd) | |
39 | return -ENOMEM; | |
40 | ||
41 | dev_set_drvdata(dev, ndd); | |
4a826c83 DW |
42 | ndd->dpa.name = dev_name(dev); |
43 | ndd->ns_current = -1; | |
44 | ndd->ns_next = -1; | |
45 | ndd->dpa.start = 0; | |
46 | ndd->dpa.end = -1; | |
4d88a97a | 47 | ndd->dev = dev; |
bf9bccc1 DW |
48 | get_device(dev); |
49 | kref_init(&ndd->kref); | |
4d88a97a DW |
50 | |
51 | rc = nvdimm_init_nsarea(ndd); | |
52 | if (rc) | |
53 | goto err; | |
54 | ||
55 | rc = nvdimm_init_config_data(ndd); | |
56 | if (rc) | |
57 | goto err; | |
58 | ||
59 | dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size); | |
60 | ||
4a826c83 DW |
61 | nvdimm_bus_lock(dev); |
62 | ndd->ns_current = nd_label_validate(ndd); | |
63 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); | |
64 | nd_label_copy(ndd, to_next_namespace_index(ndd), | |
65 | to_current_namespace_index(ndd)); | |
66 | rc = nd_label_reserve_dpa(ndd); | |
42237e39 DW |
67 | if (ndd->ns_current >= 0) |
68 | nvdimm_set_aliasing(dev); | |
4a826c83 DW |
69 | nvdimm_bus_unlock(dev); |
70 | ||
71 | if (rc) | |
72 | goto err; | |
73 | ||
4d88a97a DW |
74 | return 0; |
75 | ||
76 | err: | |
bf9bccc1 | 77 | put_ndd(ndd); |
4d88a97a DW |
78 | return rc; |
79 | } | |
80 | ||
81 | static int nvdimm_remove(struct device *dev) | |
82 | { | |
83 | struct nvdimm_drvdata *ndd = dev_get_drvdata(dev); | |
84 | ||
aee65987 TK |
85 | if (!ndd) |
86 | return 0; | |
87 | ||
4a826c83 DW |
88 | nvdimm_bus_lock(dev); |
89 | dev_set_drvdata(dev, NULL); | |
4a826c83 | 90 | nvdimm_bus_unlock(dev); |
bf9bccc1 | 91 | put_ndd(ndd); |
4d88a97a DW |
92 | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static struct nd_device_driver nvdimm_driver = { | |
97 | .probe = nvdimm_probe, | |
98 | .remove = nvdimm_remove, | |
99 | .drv = { | |
100 | .name = "nvdimm", | |
101 | }, | |
102 | .type = ND_DRIVER_DIMM, | |
103 | }; | |
104 | ||
105 | int __init nvdimm_init(void) | |
106 | { | |
107 | return nd_driver_register(&nvdimm_driver); | |
108 | } | |
109 | ||
3d88002e | 110 | void nvdimm_exit(void) |
4d88a97a DW |
111 | { |
112 | driver_unregister(&nvdimm_driver.drv); | |
113 | } | |
114 | ||
115 | MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM); |