bus.c (4d88a97aa9e8cfa6460aab119c5da60ad2267423) bus.c (3d88002e4a7bd40f355550284c6cd140e6fe29dc)
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/vmalloc.h>
15#include <linux/uaccess.h>
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/vmalloc.h>
15#include <linux/uaccess.h>
16#include <linux/module.h>
16#include <linux/fcntl.h>
17#include <linux/async.h>
18#include <linux/ndctl.h>
19#include <linux/sched.h>
20#include <linux/slab.h>
21#include <linux/fs.h>
22#include <linux/io.h>
23#include <linux/mm.h>

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28int nvdimm_major;
29static int nvdimm_bus_major;
30static struct class *nd_class;
31
32static int to_nd_device_type(struct device *dev)
33{
34 if (is_nvdimm(dev))
35 return ND_DEVICE_DIMM;
17#include <linux/fcntl.h>
18#include <linux/async.h>
19#include <linux/ndctl.h>
20#include <linux/sched.h>
21#include <linux/slab.h>
22#include <linux/fs.h>
23#include <linux/io.h>
24#include <linux/mm.h>

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29int nvdimm_major;
30static int nvdimm_bus_major;
31static struct class *nd_class;
32
33static int to_nd_device_type(struct device *dev)
34{
35 if (is_nvdimm(dev))
36 return ND_DEVICE_DIMM;
37 else if (is_nd_pmem(dev))
38 return ND_DEVICE_REGION_PMEM;
39 else if (is_nd_blk(dev))
40 return ND_DEVICE_REGION_BLK;
41 else if (is_nd_pmem(dev->parent) || is_nd_blk(dev->parent))
42 return nd_region_to_nstype(to_nd_region(dev->parent));
36
37 return 0;
38}
39
40static int nvdimm_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
41{
42 return add_uevent_var(env, "MODALIAS=" ND_DEVICE_MODALIAS_FMT,
43 to_nd_device_type(dev));
44}
45
46static int nvdimm_bus_match(struct device *dev, struct device_driver *drv)
47{
48 struct nd_device_driver *nd_drv = to_nd_device_driver(drv);
49
50 return test_bit(to_nd_device_type(dev), &nd_drv->type);
51}
52
43
44 return 0;
45}
46
47static int nvdimm_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
48{
49 return add_uevent_var(env, "MODALIAS=" ND_DEVICE_MODALIAS_FMT,
50 to_nd_device_type(dev));
51}
52
53static int nvdimm_bus_match(struct device *dev, struct device_driver *drv)
54{
55 struct nd_device_driver *nd_drv = to_nd_device_driver(drv);
56
57 return test_bit(to_nd_device_type(dev), &nd_drv->type);
58}
59
60static struct module *to_bus_provider(struct device *dev)
61{
62 /* pin bus providers while regions are enabled */
63 if (is_nd_pmem(dev) || is_nd_blk(dev)) {
64 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
65
66 return nvdimm_bus->module;
67 }
68 return NULL;
69}
70
53static int nvdimm_bus_probe(struct device *dev)
54{
55 struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
71static int nvdimm_bus_probe(struct device *dev)
72{
73 struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
74 struct module *provider = to_bus_provider(dev);
56 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
57 int rc;
58
75 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
76 int rc;
77
78 if (!try_module_get(provider))
79 return -ENXIO;
80
59 rc = nd_drv->probe(dev);
60 dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name,
61 dev_name(dev), rc);
81 rc = nd_drv->probe(dev);
82 dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name,
83 dev_name(dev), rc);
84 if (rc != 0)
85 module_put(provider);
62 return rc;
63}
64
65static int nvdimm_bus_remove(struct device *dev)
66{
67 struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
86 return rc;
87}
88
89static int nvdimm_bus_remove(struct device *dev)
90{
91 struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
92 struct module *provider = to_bus_provider(dev);
68 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
69 int rc;
70
71 rc = nd_drv->remove(dev);
72 dev_dbg(&nvdimm_bus->dev, "%s.remove(%s) = %d\n", dev->driver->name,
73 dev_name(dev), rc);
93 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
94 int rc;
95
96 rc = nd_drv->remove(dev);
97 dev_dbg(&nvdimm_bus->dev, "%s.remove(%s) = %d\n", dev->driver->name,
98 dev_name(dev), rc);
99 module_put(provider);
74 return rc;
75}
76
77static struct bus_type nvdimm_bus_type = {
78 .name = "nd",
79 .uevent = nvdimm_bus_uevent,
80 .match = nvdimm_bus_match,
81 .probe = nvdimm_bus_probe,

--- 496 unchanged lines hidden --- 		100 return rc;
101}
102
103static struct bus_type nvdimm_bus_type = {
104 .name = "nd",
105 .uevent = nvdimm_bus_uevent,
106 .match = nvdimm_bus_match,
107 .probe = nvdimm_bus_probe,

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