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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
4 */
5#include <linux/vmalloc.h>
6#include <linux/module.h>
7#include <linux/device.h>
8#include <linux/sizes.h>
9#include <linux/ndctl.h>
10#include <linux/slab.h>
11#include <linux/mm.h>
12#include <linux/nd.h>
13#include "label.h"
14#include "nd.h"
15
16static int nvdimm_probe(struct device *dev)
17{
18 struct nvdimm_drvdata *ndd;
19 int rc;
20
21 rc = nvdimm_security_setup_events(dev);
22 if (rc < 0) {
23 dev_err(dev, "security event setup failed: %d\n", rc);
24 return rc;
25 }
26
27 rc = nvdimm_check_config_data(dev);
28 if (rc) {
29 /* not required for non-aliased nvdimm, ex. NVDIMM-N */
30 if (rc == -ENOTTY)
31 rc = 0;
32 return rc;
33 }
34
35 /*
36 * The locked status bit reflects explicit status codes from the
37 * label reading commands, revalidate it each time the driver is
38 * activated and re-reads the label area.
39 */
40 nvdimm_clear_locked(dev);
41
42 ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
43 if (!ndd)
44 return -ENOMEM;
45
46 dev_set_drvdata(dev, ndd);
47 ndd->dpa.name = dev_name(dev);
48 ndd->ns_current = -1;
49 ndd->ns_next = -1;
50 ndd->dpa.start = 0;
51 ndd->dpa.end = -1;
52 ndd->dev = dev;
53 get_device(dev);
54 kref_init(&ndd->kref);
55
56 /*
57 * Attempt to unlock, if the DIMM supports security commands,
58 * otherwise the locked indication is determined by explicit
59 * status codes from the label reading commands.
60 */
61 rc = nvdimm_security_unlock(dev);
62 if (rc < 0)
63 dev_dbg(dev, "failed to unlock dimm: %d\n", rc);
64
65
66 /*
67 * EACCES failures reading the namespace label-area-properties
68 * are interpreted as the DIMM capacity being locked but the
69 * namespace labels themselves being accessible.
70 */
71 rc = nvdimm_init_nsarea(ndd);
72 if (rc == -EACCES) {
73 /*
74 * See nvdimm_namespace_common_probe() where we fail to
75 * allow namespaces to probe while the DIMM is locked,
76 * but we do allow for namespace enumeration.
77 */
78 nvdimm_set_locked(dev);
79 rc = 0;
80 }
81 if (rc)
82 goto err;
83
84 /*
85 * EACCES failures reading the namespace label-data are
86 * interpreted as the label area being locked in addition to the
87 * DIMM capacity. We fail the dimm probe to prevent regions from
88 * attempting to parse the label area.
89 */
90 rc = nd_label_data_init(ndd);
91 if (rc == -EACCES)
92 nvdimm_set_locked(dev);
93 if (rc)
94 goto err;
95
96 dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
97
98 nvdimm_bus_lock(dev);
99 if (ndd->ns_current >= 0) {
100 rc = nd_label_reserve_dpa(ndd);
101 if (rc == 0)
102 nvdimm_set_labeling(dev);
103 }
104 nvdimm_bus_unlock(dev);
105
106 if (rc)
107 goto err;
108
109 return 0;
110
111 err:
112 put_ndd(ndd);
113 return rc;
114}
115
116static void nvdimm_remove(struct device *dev)
117{
118 struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
119
120 nvdimm_bus_lock(dev);
121 dev_set_drvdata(dev, NULL);
122 nvdimm_bus_unlock(dev);
123 put_ndd(ndd);
124}
125
126static struct nd_device_driver nvdimm_driver = {
127 .probe = nvdimm_probe,
128 .remove = nvdimm_remove,
129 .drv = {
130 .name = "nvdimm",
131 },
132 .type = ND_DRIVER_DIMM,
133};
134
135int __init nvdimm_init(void)
136{
137 return nd_driver_register(&nvdimm_driver);
138}
139
140void nvdimm_exit(void)
141{
142 driver_unregister(&nvdimm_driver.drv);
143}
144
145MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM);
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>
21#include "label.h"
22#include "nd.h"
23
24static int nvdimm_probe(struct device *dev)
25{
26 struct nvdimm_drvdata *ndd;
27 int rc;
28
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
37 ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
38 if (!ndd)
39 return -ENOMEM;
40
41 dev_set_drvdata(dev, ndd);
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;
47 ndd->dev = dev;
48 get_device(dev);
49 kref_init(&ndd->kref);
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
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);
67 if (ndd->ns_current >= 0)
68 nvdimm_set_aliasing(dev);
69 nvdimm_bus_unlock(dev);
70
71 if (rc)
72 goto err;
73
74 return 0;
75
76 err:
77 put_ndd(ndd);
78 return rc;
79}
80
81static int nvdimm_remove(struct device *dev)
82{
83 struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
84
85 if (!ndd)
86 return 0;
87
88 nvdimm_bus_lock(dev);
89 dev_set_drvdata(dev, NULL);
90 nvdimm_bus_unlock(dev);
91 put_ndd(ndd);
92
93 return 0;
94}
95
96static 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
105int __init nvdimm_init(void)
106{
107 return nd_driver_register(&nvdimm_driver);
108}
109
110void nvdimm_exit(void)
111{
112 driver_unregister(&nvdimm_driver.drv);
113}
114
115MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM);