blob: 8282db2ef99ea02077ef5609b85acfe0a8aae823 [file] [log] [blame]
Dan Williams7a678322015-08-19 00:34:34 -04001/*
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
9static const struct attribute_group *e820_pmem_attribute_groups[] = {
10 &nvdimm_bus_attribute_group,
11 NULL,
12};
13
14static const struct attribute_group *e820_pmem_region_attribute_groups[] = {
15 &nd_region_attribute_group,
16 &nd_device_attribute_group,
17 NULL,
18};
19
20static 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
28static 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;
Dan Williams004f1af2015-08-24 19:20:23 -040052 set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
Dan Williams7a678322015-08-19 00:34:34 -040053 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
65static 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
73static __init int e820_pmem_init(void)
74{
75 return platform_driver_register(&e820_pmem_driver);
76}
77
78static __exit void e820_pmem_exit(void)
79{
80 platform_driver_unregister(&e820_pmem_driver);
81}
82
83MODULE_ALIAS("platform:e820_pmem*");
84MODULE_LICENSE("GPL v2");
85MODULE_AUTHOR("Intel Corporation");
86module_init(e820_pmem_init);
87module_exit(e820_pmem_exit);