2 * Copyright (c) 2015, Christoph Hellwig.
3 * Copyright (c) 2015, Intel Corporation.
5 #include <linux/platform_device.h>
6 #include <linux/libnvdimm.h>
7 #include <linux/module.h>
9 static const struct attribute_group
*e820_pmem_attribute_groups
[] = {
10 &nvdimm_bus_attribute_group
,
14 static const struct attribute_group
*e820_pmem_region_attribute_groups
[] = {
15 &nd_region_attribute_group
,
16 &nd_device_attribute_group
,
20 static int e820_pmem_remove(struct platform_device
*pdev
)
22 struct nvdimm_bus
*nvdimm_bus
= platform_get_drvdata(pdev
);
24 nvdimm_bus_unregister(nvdimm_bus
);
28 static int e820_pmem_probe(struct platform_device
*pdev
)
30 static struct nvdimm_bus_descriptor nd_desc
;
31 struct device
*dev
= &pdev
->dev
;
32 struct nvdimm_bus
*nvdimm_bus
;
35 nd_desc
.attr_groups
= e820_pmem_attribute_groups
;
36 nd_desc
.provider_name
= "e820";
37 nvdimm_bus
= nvdimm_bus_register(dev
, &nd_desc
);
40 platform_set_drvdata(pdev
, nvdimm_bus
);
42 for (p
= iomem_resource
.child
; p
; p
= p
->sibling
) {
43 struct nd_region_desc ndr_desc
;
45 if (strncmp(p
->name
, "Persistent Memory (legacy)", 26) != 0)
48 memset(&ndr_desc
, 0, sizeof(ndr_desc
));
50 ndr_desc
.attr_groups
= e820_pmem_region_attribute_groups
;
51 ndr_desc
.numa_node
= NUMA_NO_NODE
;
52 set_bit(ND_REGION_PAGEMAP
, &ndr_desc
.flags
);
53 if (!nvdimm_pmem_region_create(nvdimm_bus
, &ndr_desc
))
60 nvdimm_bus_unregister(nvdimm_bus
);
61 dev_err(dev
, "failed to register legacy persistent memory ranges\n");
65 static struct platform_driver e820_pmem_driver
= {
66 .probe
= e820_pmem_probe
,
67 .remove
= e820_pmem_remove
,
73 static __init
int e820_pmem_init(void)
75 return platform_driver_register(&e820_pmem_driver
);
78 static __exit
void e820_pmem_exit(void)
80 platform_driver_unregister(&e820_pmem_driver
);
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
);