region_devs.c (1f7df6f88b9245a7f2d0f8ecbc97dc88c8d0d8e1) region_devs.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

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42 .release = nd_region_release,
43};
44
45static struct device_type nd_volatile_device_type = {
46 .name = "nd_volatile",
47 .release = nd_region_release,
48};
49
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

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42 .release = nd_region_release,
43};
44
45static struct device_type nd_volatile_device_type = {
46 .name = "nd_volatile",
47 .release = nd_region_release,
48};
49
50static bool is_nd_pmem(struct device *dev)
50bool is_nd_pmem(struct device *dev)
51{
52 return dev ? dev->type == &nd_pmem_device_type : false;
53}
54
51{
52 return dev ? dev->type == &nd_pmem_device_type : false;
53}
54
55bool is_nd_blk(struct device *dev)
56{
57 return dev ? dev->type == &nd_blk_device_type : false;
58}
59
55struct nd_region *to_nd_region(struct device *dev)
56{
57 struct nd_region *nd_region = container_of(dev, struct nd_region, dev);
58
59 WARN_ON(dev->type->release != nd_region_release);
60 return nd_region;
61}
62EXPORT_SYMBOL_GPL(to_nd_region);
63
60struct nd_region *to_nd_region(struct device *dev)
61{
62 struct nd_region *nd_region = container_of(dev, struct nd_region, dev);
63
64 WARN_ON(dev->type->release != nd_region_release);
65 return nd_region;
66}
67EXPORT_SYMBOL_GPL(to_nd_region);
68
69/**
70 * nd_region_to_nstype() - region to an integer namespace type
71 * @nd_region: region-device to interrogate
72 *
73 * This is the 'nstype' attribute of a region as well, an input to the
74 * MODALIAS for namespace devices, and bit number for a nvdimm_bus to match
75 * namespace devices with namespace drivers.
76 */
77int nd_region_to_nstype(struct nd_region *nd_region)
78{
79 if (is_nd_pmem(&nd_region->dev)) {
80 u16 i, alias;
81
82 for (i = 0, alias = 0; i < nd_region->ndr_mappings; i++) {
83 struct nd_mapping *nd_mapping = &nd_region->mapping[i];
84 struct nvdimm *nvdimm = nd_mapping->nvdimm;
85
86 if (nvdimm->flags & NDD_ALIASING)
87 alias++;
88 }
89 if (alias)
90 return ND_DEVICE_NAMESPACE_PMEM;
91 else
92 return ND_DEVICE_NAMESPACE_IO;
93 } else if (is_nd_blk(&nd_region->dev)) {
94 return ND_DEVICE_NAMESPACE_BLK;
95 }
96
97 return 0;
98}
99
64static ssize_t size_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
66{
67 struct nd_region *nd_region = to_nd_region(dev);
68 unsigned long long size = 0;
69
70 if (is_nd_pmem(dev)) {
71 size = nd_region->ndr_size;

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83 struct device_attribute *attr, char *buf)
84{
85 struct nd_region *nd_region = to_nd_region(dev);
86
87 return sprintf(buf, "%d\n", nd_region->ndr_mappings);
88}
89static DEVICE_ATTR_RO(mappings);
90
100static ssize_t size_show(struct device *dev,
101 struct device_attribute *attr, char *buf)
102{
103 struct nd_region *nd_region = to_nd_region(dev);
104 unsigned long long size = 0;
105
106 if (is_nd_pmem(dev)) {
107 size = nd_region->ndr_size;

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119 struct device_attribute *attr, char *buf)
120{
121 struct nd_region *nd_region = to_nd_region(dev);
122
123 return sprintf(buf, "%d\n", nd_region->ndr_mappings);
124}
125static DEVICE_ATTR_RO(mappings);
126
127static ssize_t nstype_show(struct device *dev,
128 struct device_attribute *attr, char *buf)
129{
130 struct nd_region *nd_region = to_nd_region(dev);
131
132 return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region));
133}
134static DEVICE_ATTR_RO(nstype);
135
136static ssize_t init_namespaces_show(struct device *dev,
137 struct device_attribute *attr, char *buf)
138{
139 struct nd_region_namespaces *num_ns = dev_get_drvdata(dev);
140 ssize_t rc;
141
142 nvdimm_bus_lock(dev);
143 if (num_ns)
144 rc = sprintf(buf, "%d/%d\n", num_ns->active, num_ns->count);
145 else
146 rc = -ENXIO;
147 nvdimm_bus_unlock(dev);
148
149 return rc;
150}
151static DEVICE_ATTR_RO(init_namespaces);
152
91static struct attribute *nd_region_attributes[] = {
92 &dev_attr_size.attr,
153static struct attribute *nd_region_attributes[] = {
154 &dev_attr_size.attr,
155 &dev_attr_nstype.attr,
93 &dev_attr_mappings.attr,
156 &dev_attr_mappings.attr,
157 &dev_attr_init_namespaces.attr,
94 NULL,
95};
96
97struct attribute_group nd_region_attribute_group = {
98 .attrs = nd_region_attributes,
99};
100EXPORT_SYMBOL_GPL(nd_region_attribute_group);
101

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159};
160
161struct attribute_group nd_region_attribute_group = {
162 .attrs = nd_region_attributes,
163};
164EXPORT_SYMBOL_GPL(nd_region_attribute_group);
165

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