blob: 233907889f96a36d6a3b87fc79cf82cabf602def [file] [log] [blame]
Dan Williams4d88a972015-05-31 14:41:48 -04001/*
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>
Dan Williams4a826c82015-06-09 16:09:36 -040021#include "label.h"
Dan Williams4d88a972015-05-31 14:41:48 -040022#include "nd.h"
23
Dan Williams4d88a972015-05-31 14:41:48 -040024static int nvdimm_probe(struct device *dev)
25{
26 struct nvdimm_drvdata *ndd;
27 int rc;
28
Toshi Kaniaee65982016-08-16 13:08:40 -060029 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
Dan Williams4d88a972015-05-31 14:41:48 -040037 ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
38 if (!ndd)
39 return -ENOMEM;
40
41 dev_set_drvdata(dev, ndd);
Dan Williams4a826c82015-06-09 16:09:36 -040042 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;
Dan Williams4d88a972015-05-31 14:41:48 -040047 ndd->dev = dev;
Dan Williamsbf9bccc2015-06-17 17:14:46 -040048 get_device(dev);
49 kref_init(&ndd->kref);
Dan Williams4d88a972015-05-31 14:41:48 -040050
51 rc = nvdimm_init_nsarea(ndd);
Dan Williams9d62ed92017-05-04 11:47:22 -070052 if (rc == -EACCES)
53 nvdimm_set_locked(dev);
Dan Williams4d88a972015-05-31 14:41:48 -040054 if (rc)
55 goto err;
56
57 rc = nvdimm_init_config_data(ndd);
Dan Williams4b27db72017-09-24 09:57:34 -070058 if (rc == -EACCES)
59 nvdimm_set_locked(dev);
Dan Williams4d88a972015-05-31 14:41:48 -040060 if (rc)
61 goto err;
62
63 dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
64
Dan Williams4a826c82015-06-09 16:09:36 -040065 nvdimm_bus_lock(dev);
66 ndd->ns_current = nd_label_validate(ndd);
67 ndd->ns_next = nd_label_next_nsindex(ndd->ns_current);
68 nd_label_copy(ndd, to_next_namespace_index(ndd),
69 to_current_namespace_index(ndd));
Dan Williamsc31898c2018-04-06 11:25:38 -070070 if (ndd->ns_current >= 0) {
71 rc = nd_label_reserve_dpa(ndd);
72 if (rc == 0)
73 nvdimm_set_aliasing(dev);
74 }
Dan Williamsd34cb802017-09-25 11:01:31 -070075 nvdimm_clear_locked(dev);
Dan Williams4a826c82015-06-09 16:09:36 -040076 nvdimm_bus_unlock(dev);
77
78 if (rc)
79 goto err;
80
Dan Williams4d88a972015-05-31 14:41:48 -040081 return 0;
82
83 err:
Dan Williamsbf9bccc2015-06-17 17:14:46 -040084 put_ndd(ndd);
Dan Williams4d88a972015-05-31 14:41:48 -040085 return rc;
86}
87
88static int nvdimm_remove(struct device *dev)
89{
90 struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
91
Toshi Kaniaee65982016-08-16 13:08:40 -060092 if (!ndd)
93 return 0;
94
Dan Williams4a826c82015-06-09 16:09:36 -040095 nvdimm_bus_lock(dev);
96 dev_set_drvdata(dev, NULL);
Dan Williams4a826c82015-06-09 16:09:36 -040097 nvdimm_bus_unlock(dev);
Dan Williamsbf9bccc2015-06-17 17:14:46 -040098 put_ndd(ndd);
Dan Williams4d88a972015-05-31 14:41:48 -040099
100 return 0;
101}
102
103static struct nd_device_driver nvdimm_driver = {
104 .probe = nvdimm_probe,
105 .remove = nvdimm_remove,
106 .drv = {
107 .name = "nvdimm",
108 },
109 .type = ND_DRIVER_DIMM,
110};
111
112int __init nvdimm_init(void)
113{
114 return nd_driver_register(&nvdimm_driver);
115}
116
Dan Williams3d880022015-05-31 15:02:11 -0400117void nvdimm_exit(void)
Dan Williams4d88a972015-05-31 14:41:48 -0400118{
119 driver_unregister(&nvdimm_driver.drv);
120}
121
122MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM);