[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / drivers / nvdimm / e820.c

/*
 * Copyright (c) 2015, Christoph Hellwig.
 * Copyright (c) 2015, Intel Corporation.
 */
#include <linux/platform_device.h>
#include <linux/libnvdimm.h>
#include <linux/module.h>

static const struct attribute_group *e820_pmem_attribute_groups[] = {
	&nvdimm_bus_attribute_group,
	NULL,
};

static const struct attribute_group *e820_pmem_region_attribute_groups[] = {
	&nd_region_attribute_group,
	&nd_device_attribute_group,
	NULL,
};

static int e820_pmem_remove(struct platform_device *pdev)
{
	struct nvdimm_bus *nvdimm_bus = platform_get_drvdata(pdev);

	nvdimm_bus_unregister(nvdimm_bus);
	return 0;
}

static int e820_pmem_probe(struct platform_device *pdev)
{
	static struct nvdimm_bus_descriptor nd_desc;
	struct device *dev = &pdev->dev;
	struct nvdimm_bus *nvdimm_bus;
	struct resource *p;

	nd_desc.attr_groups = e820_pmem_attribute_groups;
	nd_desc.provider_name = "e820";
	nvdimm_bus = nvdimm_bus_register(dev, &nd_desc);
	if (!nvdimm_bus)
		goto err;
	platform_set_drvdata(pdev, nvdimm_bus);

	for (p = iomem_resource.child; p ; p = p->sibling) {
		struct nd_region_desc ndr_desc;

		if (strncmp(p->name, "Persistent Memory (legacy)", 26) != 0)
			continue;

		memset(&ndr_desc, 0, sizeof(ndr_desc));
		ndr_desc.res = p;
		ndr_desc.attr_groups = e820_pmem_region_attribute_groups;
		ndr_desc.numa_node = NUMA_NO_NODE;
		set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
		if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc))
			goto err;
	}

	return 0;

 err:
	nvdimm_bus_unregister(nvdimm_bus);
	dev_err(dev, "failed to register legacy persistent memory ranges\n");
	return -ENXIO;
}

static struct platform_driver e820_pmem_driver = {
	.probe = e820_pmem_probe,
	.remove = e820_pmem_remove,
	.driver = {
		.name = "e820_pmem",
	},
};

static __init int e820_pmem_init(void)
{
	return platform_driver_register(&e820_pmem_driver);
}

static __exit void e820_pmem_exit(void)
{
	platform_driver_unregister(&e820_pmem_driver);
}

MODULE_ALIAS("platform:e820_pmem*");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Intel Corporation");
module_init(e820_pmem_init);
module_exit(e820_pmem_exit);
Commit	Line	Data
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);