Commit | Line | Data |
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7a67832c DW |
1 | /* |
2 | * Copyright (c) 2015, Christoph Hellwig. | |
3 | * Copyright (c) 2015, Intel Corporation. | |
4 | */ | |
5 | #include <linux/platform_device.h> | |
6 | #include <linux/libnvdimm.h> | |
7 | #include <linux/module.h> | |
8 | ||
9 | static const struct attribute_group *e820_pmem_attribute_groups[] = { | |
10 | &nvdimm_bus_attribute_group, | |
11 | NULL, | |
12 | }; | |
13 | ||
14 | static const struct attribute_group *e820_pmem_region_attribute_groups[] = { | |
15 | &nd_region_attribute_group, | |
16 | &nd_device_attribute_group, | |
17 | NULL, | |
18 | }; | |
19 | ||
20 | static int e820_pmem_remove(struct platform_device *pdev) | |
21 | { | |
22 | struct nvdimm_bus *nvdimm_bus = platform_get_drvdata(pdev); | |
23 | ||
24 | nvdimm_bus_unregister(nvdimm_bus); | |
25 | return 0; | |
26 | } | |
27 | ||
28 | static int e820_pmem_probe(struct platform_device *pdev) | |
29 | { | |
30 | static struct nvdimm_bus_descriptor nd_desc; | |
31 | struct device *dev = &pdev->dev; | |
32 | struct nvdimm_bus *nvdimm_bus; | |
33 | struct resource *p; | |
34 | ||
35 | nd_desc.attr_groups = e820_pmem_attribute_groups; | |
36 | nd_desc.provider_name = "e820"; | |
37 | nvdimm_bus = nvdimm_bus_register(dev, &nd_desc); | |
38 | if (!nvdimm_bus) | |
39 | goto err; | |
40 | platform_set_drvdata(pdev, nvdimm_bus); | |
41 | ||
42 | for (p = iomem_resource.child; p ; p = p->sibling) { | |
43 | struct nd_region_desc ndr_desc; | |
44 | ||
45 | if (strncmp(p->name, "Persistent Memory (legacy)", 26) != 0) | |
46 | continue; | |
47 | ||
48 | memset(&ndr_desc, 0, sizeof(ndr_desc)); | |
49 | ndr_desc.res = p; | |
50 | ndr_desc.attr_groups = e820_pmem_region_attribute_groups; | |
51 | ndr_desc.numa_node = NUMA_NO_NODE; | |
004f1afb | 52 | set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags); |
7a67832c DW |
53 | if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc)) |
54 | goto err; | |
55 | } | |
56 | ||
57 | return 0; | |
58 | ||
59 | err: | |
60 | nvdimm_bus_unregister(nvdimm_bus); | |
61 | dev_err(dev, "failed to register legacy persistent memory ranges\n"); | |
62 | return -ENXIO; | |
63 | } | |
64 | ||
65 | static struct platform_driver e820_pmem_driver = { | |
66 | .probe = e820_pmem_probe, | |
67 | .remove = e820_pmem_remove, | |
68 | .driver = { | |
69 | .name = "e820_pmem", | |
70 | }, | |
71 | }; | |
72 | ||
73 | static __init int e820_pmem_init(void) | |
74 | { | |
75 | return platform_driver_register(&e820_pmem_driver); | |
76 | } | |
77 | ||
78 | static __exit void e820_pmem_exit(void) | |
79 | { | |
80 | platform_driver_unregister(&e820_pmem_driver); | |
81 | } | |
82 | ||
83 | MODULE_ALIAS("platform:e820_pmem*"); | |
84 | MODULE_LICENSE("GPL v2"); | |
85 | MODULE_AUTHOR("Intel Corporation"); | |
86 | module_init(e820_pmem_init); | |
87 | module_exit(e820_pmem_exit); |