[linux-2.6-block.git] / drivers / nvdimm / core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
 */
#include <linux/libnvdimm.h>
#include <linux/badblocks.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/device.h>
#include <linux/ctype.h>
#include <linux/ndctl.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/io.h>
#include "nd-core.h"
#include "nd.h"

LIST_HEAD(nvdimm_bus_list);
DEFINE_MUTEX(nvdimm_bus_list_mutex);

void nvdimm_bus_lock(struct device *dev)
{
	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

	if (!nvdimm_bus)
		return;
	mutex_lock(&nvdimm_bus->reconfig_mutex);
}
EXPORT_SYMBOL(nvdimm_bus_lock);

void nvdimm_bus_unlock(struct device *dev)
{
	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

	if (!nvdimm_bus)
		return;
	mutex_unlock(&nvdimm_bus->reconfig_mutex);
}
EXPORT_SYMBOL(nvdimm_bus_unlock);

bool is_nvdimm_bus_locked(struct device *dev)
{
	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

	if (!nvdimm_bus)
		return false;
	return mutex_is_locked(&nvdimm_bus->reconfig_mutex);
}
EXPORT_SYMBOL(is_nvdimm_bus_locked);

struct nvdimm_map {
	struct nvdimm_bus *nvdimm_bus;
	struct list_head list;
	resource_size_t offset;
	unsigned long flags;
	size_t size;
	union {
		void *mem;
		void __iomem *iomem;
	};
	struct kref kref;
};

static struct nvdimm_map *find_nvdimm_map(struct device *dev,
		resource_size_t offset)
{
	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	struct nvdimm_map *nvdimm_map;

	list_for_each_entry(nvdimm_map, &nvdimm_bus->mapping_list, list)
		if (nvdimm_map->offset == offset)
			return nvdimm_map;
	return NULL;
}

static struct nvdimm_map *alloc_nvdimm_map(struct device *dev,
		resource_size_t offset, size_t size, unsigned long flags)
{
	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	struct nvdimm_map *nvdimm_map;

	nvdimm_map = kzalloc(sizeof(*nvdimm_map), GFP_KERNEL);
	if (!nvdimm_map)
		return NULL;

	INIT_LIST_HEAD(&nvdimm_map->list);
	nvdimm_map->nvdimm_bus = nvdimm_bus;
	nvdimm_map->offset = offset;
	nvdimm_map->flags = flags;
	nvdimm_map->size = size;
	kref_init(&nvdimm_map->kref);

	if (!request_mem_region(offset, size, dev_name(&nvdimm_bus->dev))) {
		dev_err(&nvdimm_bus->dev, "failed to request %pa + %zd for %s\n",
				&offset, size, dev_name(dev));
		goto err_request_region;
	}

	if (flags)
		nvdimm_map->mem = memremap(offset, size, flags);
	else
		nvdimm_map->iomem = ioremap(offset, size);

	if (!nvdimm_map->mem)
		goto err_map;

	dev_WARN_ONCE(dev, !is_nvdimm_bus_locked(dev), "%s: bus unlocked!",
			__func__);
	list_add(&nvdimm_map->list, &nvdimm_bus->mapping_list);

	return nvdimm_map;

 err_map:
	release_mem_region(offset, size);
 err_request_region:
	kfree(nvdimm_map);
	return NULL;
}

static void nvdimm_map_release(struct kref *kref)
{
	struct nvdimm_bus *nvdimm_bus;
	struct nvdimm_map *nvdimm_map;

	nvdimm_map = container_of(kref, struct nvdimm_map, kref);
	nvdimm_bus = nvdimm_map->nvdimm_bus;

	dev_dbg(&nvdimm_bus->dev, "%pa\n", &nvdimm_map->offset);
	list_del(&nvdimm_map->list);
	if (nvdimm_map->flags)
		memunmap(nvdimm_map->mem);
	else
		iounmap(nvdimm_map->iomem);
	release_mem_region(nvdimm_map->offset, nvdimm_map->size);
	kfree(nvdimm_map);
}

static void nvdimm_map_put(void *data)
{
	struct nvdimm_map *nvdimm_map = data;
	struct nvdimm_bus *nvdimm_bus = nvdimm_map->nvdimm_bus;

	nvdimm_bus_lock(&nvdimm_bus->dev);
	kref_put(&nvdimm_map->kref, nvdimm_map_release);
	nvdimm_bus_unlock(&nvdimm_bus->dev);
}

/**
 * devm_nvdimm_memremap - map a resource that is shared across regions
 * @dev: device that will own a reference to the shared mapping
 * @offset: physical base address of the mapping
 * @size: mapping size
 * @flags: memremap flags, or, if zero, perform an ioremap instead
 */
void *devm_nvdimm_memremap(struct device *dev, resource_size_t offset,
		size_t size, unsigned long flags)
{
	struct nvdimm_map *nvdimm_map;

	nvdimm_bus_lock(dev);
	nvdimm_map = find_nvdimm_map(dev, offset);
	if (!nvdimm_map)
		nvdimm_map = alloc_nvdimm_map(dev, offset, size, flags);
	else
		kref_get(&nvdimm_map->kref);
	nvdimm_bus_unlock(dev);

	if (!nvdimm_map)
		return NULL;

	if (devm_add_action_or_reset(dev, nvdimm_map_put, nvdimm_map))
		return NULL;

	return nvdimm_map->mem;
}
EXPORT_SYMBOL_GPL(devm_nvdimm_memremap);

u64 nd_fletcher64(void *addr, size_t len, bool le)
{
	u32 *buf = addr;
	u32 lo32 = 0;
	u64 hi32 = 0;
	int i;

	for (i = 0; i < len / sizeof(u32); i++) {
		lo32 += le ? le32_to_cpu((__le32) buf[i]) : buf[i];
		hi32 += lo32;
	}

	return hi32 << 32 | lo32;
}
EXPORT_SYMBOL_GPL(nd_fletcher64);

struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus)
{
	/* struct nvdimm_bus definition is private to libnvdimm */
	return nvdimm_bus->nd_desc;
}
EXPORT_SYMBOL_GPL(to_nd_desc);

struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus)
{
	/* struct nvdimm_bus definition is private to libnvdimm */
	return &nvdimm_bus->dev;
}
EXPORT_SYMBOL_GPL(to_nvdimm_bus_dev);

static bool is_uuid_sep(char sep)
{
	if (sep == '\n' || sep == '-' || sep == ':' || sep == '\0')
		return true;
	return false;
}

static int nd_uuid_parse(struct device *dev, u8 *uuid_out, const char *buf,
		size_t len)
{
	const char *str = buf;
	u8 uuid[16];
	int i;

	for (i = 0; i < 16; i++) {
		if (!isxdigit(str[0]) || !isxdigit(str[1])) {
			dev_dbg(dev, "pos: %d buf[%zd]: %c buf[%zd]: %c\n",
					i, str - buf, str[0],
					str + 1 - buf, str[1]);
			return -EINVAL;
		}

		uuid[i] = (hex_to_bin(str[0]) << 4) | hex_to_bin(str[1]);
		str += 2;
		if (is_uuid_sep(*str))
			str++;
	}

	memcpy(uuid_out, uuid, sizeof(uuid));
	return 0;
}

/**
 * nd_uuid_store: common implementation for writing 'uuid' sysfs attributes
 * @dev: container device for the uuid property
 * @uuid_out: uuid buffer to replace
 * @buf: raw sysfs buffer to parse
 *
 * Enforce that uuids can only be changed while the device is disabled
 * (driver detached)
 * LOCKING: expects nd_device_lock() is held on entry
 */
int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
		size_t len)
{
	u8 uuid[16];
	int rc;

	if (dev->driver)
		return -EBUSY;

	rc = nd_uuid_parse(dev, uuid, buf, len);
	if (rc)
		return rc;

	kfree(*uuid_out);
	*uuid_out = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
	if (!(*uuid_out))
		return -ENOMEM;

	return 0;
}

ssize_t nd_size_select_show(unsigned long current_size,
		const unsigned long *supported, char *buf)
{
	ssize_t len = 0;
	int i;

	for (i = 0; supported[i]; i++)
		if (current_size == supported[i])
			len += sprintf(buf + len, "[%ld] ", supported[i]);
		else
			len += sprintf(buf + len, "%ld ", supported[i]);
	len += sprintf(buf + len, "\n");
	return len;
}

ssize_t nd_size_select_store(struct device *dev, const char *buf,
		unsigned long *current_size, const unsigned long *supported)
{
	unsigned long lbasize;
	int rc, i;

	if (dev->driver)
		return -EBUSY;

	rc = kstrtoul(buf, 0, &lbasize);
	if (rc)
		return rc;

	for (i = 0; supported[i]; i++)
		if (lbasize == supported[i])
			break;

	if (supported[i]) {
		*current_size = lbasize;
		return 0;
	} else {
		return -EINVAL;
	}
}

static ssize_t commands_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int cmd, len = 0;
	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
	struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;

	for_each_set_bit(cmd, &nd_desc->cmd_mask, BITS_PER_LONG)
		len += sprintf(buf + len, "%s ", nvdimm_bus_cmd_name(cmd));
	len += sprintf(buf + len, "\n");
	return len;
}
static DEVICE_ATTR_RO(commands);

static const char *nvdimm_bus_provider(struct nvdimm_bus *nvdimm_bus)
{
	struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
	struct device *parent = nvdimm_bus->dev.parent;

	if (nd_desc->provider_name)
		return nd_desc->provider_name;
	else if (parent)
		return dev_name(parent);
	else
		return "unknown";
}

static ssize_t provider_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);

	return sprintf(buf, "%s\n", nvdimm_bus_provider(nvdimm_bus));
}
static DEVICE_ATTR_RO(provider);

static int flush_namespaces(struct device *dev, void *data)
{
	nd_device_lock(dev);
	nd_device_unlock(dev);
	return 0;
}

static int flush_regions_dimms(struct device *dev, void *data)
{
	nd_device_lock(dev);
	nd_device_unlock(dev);
	device_for_each_child(dev, NULL, flush_namespaces);
	return 0;
}

static ssize_t wait_probe_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
	struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
	int rc;

	if (nd_desc->flush_probe) {
		rc = nd_desc->flush_probe(nd_desc);
		if (rc)
			return rc;
	}
	nd_synchronize();
	device_for_each_child(dev, NULL, flush_regions_dimms);
	return sprintf(buf, "1\n");
}
static DEVICE_ATTR_RO(wait_probe);

static struct attribute *nvdimm_bus_attributes[] = {
	&dev_attr_commands.attr,
	&dev_attr_wait_probe.attr,
	&dev_attr_provider.attr,
	NULL,
};

struct attribute_group nvdimm_bus_attribute_group = {
	.attrs = nvdimm_bus_attributes,
};
EXPORT_SYMBOL_GPL(nvdimm_bus_attribute_group);

int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
{
	return badrange_add(&nvdimm_bus->badrange, addr, length);
}
EXPORT_SYMBOL_GPL(nvdimm_bus_add_badrange);

#ifdef CONFIG_BLK_DEV_INTEGRITY
int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
{
	struct blk_integrity bi;

	if (meta_size == 0)
		return 0;

	memset(&bi, 0, sizeof(bi));

	bi.tuple_size = meta_size;
	bi.tag_size = meta_size;

	blk_integrity_register(disk, &bi);
	blk_queue_max_integrity_segments(disk->queue, 1);

	return 0;
}
EXPORT_SYMBOL(nd_integrity_init);

#else /* CONFIG_BLK_DEV_INTEGRITY */
int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
{
	return 0;
}
EXPORT_SYMBOL(nd_integrity_init);

#endif

static __init int libnvdimm_init(void)
{
	int rc;

	rc = nvdimm_bus_init();
	if (rc)
		return rc;
	rc = nvdimm_init();
	if (rc)
		goto err_dimm;
	rc = nd_region_init();
	if (rc)
		goto err_region;

	nd_label_init();

	return 0;
 err_region:
	nvdimm_exit();
 err_dimm:
	nvdimm_bus_exit();
	return rc;
}

static __exit void libnvdimm_exit(void)
{
	WARN_ON(!list_empty(&nvdimm_bus_list));
	nd_region_exit();
	nvdimm_exit();
	nvdimm_bus_exit();
	nd_region_devs_exit();
	nvdimm_devs_exit();
}

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Intel Corporation");
subsys_initcall(libnvdimm_init);
module_exit(libnvdimm_exit);
Commit	Line	Data
5b497af4	1	// SPDX-License-Identifier: GPL-2.0-only
b94d5230 DW	2	/*
b94d5230 DW	3	* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
b94d5230 DW	4	*/
b94d5230 DW	5	#include <linux/libnvdimm.h>
b95f5f43	6	#include <linux/badblocks.h>
b94d5230 DW	7	#include <linux/export.h>
b94d5230 DW	8	#include <linux/module.h>
41cd8b70	9	#include <linux/blkdev.h>
b94d5230	10	#include <linux/device.h>
bf9bccc1	11	#include <linux/ctype.h>
62232e45	12	#include <linux/ndctl.h>
45def22c	13	#include <linux/mutex.h>
b94d5230	14	#include <linux/slab.h>
29b9aa0a	15	#include <linux/io.h>
b94d5230	16	#include "nd-core.h"
4d88a97a	17	#include "nd.h"
b94d5230	18
e6dfb2de DW	19	LIST_HEAD(nvdimm_bus_list);
e6dfb2de DW	20	DEFINE_MUTEX(nvdimm_bus_list_mutex);
b94d5230	21
3d88002e DW	22	void nvdimm_bus_lock(struct device *dev)
	23	{
	24	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	25
	26	if (!nvdimm_bus)
	27	return;
	28	mutex_lock(&nvdimm_bus->reconfig_mutex);
	29	}
	30	EXPORT_SYMBOL(nvdimm_bus_lock);
	31
	32	void nvdimm_bus_unlock(struct device *dev)
	33	{
	34	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	35
	36	if (!nvdimm_bus)
	37	return;
	38	mutex_unlock(&nvdimm_bus->reconfig_mutex);
	39	}
	40	EXPORT_SYMBOL(nvdimm_bus_unlock);
	41
	42	bool is_nvdimm_bus_locked(struct device *dev)
	43	{
	44	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	45
	46	if (!nvdimm_bus)
	47	return false;
	48	return mutex_is_locked(&nvdimm_bus->reconfig_mutex);
	49	}
	50	EXPORT_SYMBOL(is_nvdimm_bus_locked);
	51
29b9aa0a DW	52	struct nvdimm_map {
	53	struct nvdimm_bus *nvdimm_bus;
	54	struct list_head list;
	55	resource_size_t offset;
	56	unsigned long flags;
	57	size_t size;
	58	union {
	59	void *mem;
	60	void __iomem *iomem;
	61	};
	62	struct kref kref;
	63	};
	64
	65	static struct nvdimm_map find_nvdimm_map(struct device dev,
	66	resource_size_t offset)
	67	{
	68	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	69	struct nvdimm_map *nvdimm_map;
	70
	71	list_for_each_entry(nvdimm_map, &nvdimm_bus->mapping_list, list)
	72	if (nvdimm_map->offset == offset)
	73	return nvdimm_map;
	74	return NULL;
	75	}
	76
	77	static struct nvdimm_map alloc_nvdimm_map(struct device dev,
	78	resource_size_t offset, size_t size, unsigned long flags)
	79	{
	80	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
	81	struct nvdimm_map *nvdimm_map;
	82
	83	nvdimm_map = kzalloc(sizeof(*nvdimm_map), GFP_KERNEL);
	84	if (!nvdimm_map)
	85	return NULL;
	86
	87	INIT_LIST_HEAD(&nvdimm_map->list);
	88	nvdimm_map->nvdimm_bus = nvdimm_bus;
	89	nvdimm_map->offset = offset;
	90	nvdimm_map->flags = flags;
	91	nvdimm_map->size = size;
	92	kref_init(&nvdimm_map->kref);
	93
ecfb6d8a DW	94	if (!request_mem_region(offset, size, dev_name(&nvdimm_bus->dev))) {
	95	dev_err(&nvdimm_bus->dev, "failed to request %pa + %zd for %s\n",
	96	&offset, size, dev_name(dev));
29b9aa0a	97	goto err_request_region;
ecfb6d8a	98	}
29b9aa0a DW	99
	100	if (flags)
	101	nvdimm_map->mem = memremap(offset, size, flags);
	102	else
	103	nvdimm_map->iomem = ioremap(offset, size);
	104
	105	if (!nvdimm_map->mem)
	106	goto err_map;
	107
	108	dev_WARN_ONCE(dev, !is_nvdimm_bus_locked(dev), "%s: bus unlocked!",
	109	__func__);
	110	list_add(&nvdimm_map->list, &nvdimm_bus->mapping_list);
	111
	112	return nvdimm_map;
	113
	114	err_map:
	115	release_mem_region(offset, size);
	116	err_request_region:
	117	kfree(nvdimm_map);
	118	return NULL;
	119	}
	120
	121	static void nvdimm_map_release(struct kref *kref)
	122	{
	123	struct nvdimm_bus *nvdimm_bus;
	124	struct nvdimm_map *nvdimm_map;
	125
	126	nvdimm_map = container_of(kref, struct nvdimm_map, kref);
	127	nvdimm_bus = nvdimm_map->nvdimm_bus;
	128
426824d6	129	dev_dbg(&nvdimm_bus->dev, "%pa\n", &nvdimm_map->offset);
29b9aa0a DW	130	list_del(&nvdimm_map->list);
	131	if (nvdimm_map->flags)
	132	memunmap(nvdimm_map->mem);
	133	else
	134	iounmap(nvdimm_map->iomem);
	135	release_mem_region(nvdimm_map->offset, nvdimm_map->size);
	136	kfree(nvdimm_map);
	137	}
	138
	139	static void nvdimm_map_put(void *data)
	140	{
	141	struct nvdimm_map *nvdimm_map = data;
	142	struct nvdimm_bus *nvdimm_bus = nvdimm_map->nvdimm_bus;
	143
	144	nvdimm_bus_lock(&nvdimm_bus->dev);
	145	kref_put(&nvdimm_map->kref, nvdimm_map_release);
	146	nvdimm_bus_unlock(&nvdimm_bus->dev);
	147	}
	148
	149	/**
	150	* devm_nvdimm_memremap - map a resource that is shared across regions
	151	* @dev: device that will own a reference to the shared mapping
	152	* @offset: physical base address of the mapping
	153	* @size: mapping size
	154	* @flags: memremap flags, or, if zero, perform an ioremap instead
	155	*/
	156	void devm_nvdimm_memremap(struct device dev, resource_size_t offset,
	157	size_t size, unsigned long flags)
	158	{
	159	struct nvdimm_map *nvdimm_map;
	160
	161	nvdimm_bus_lock(dev);
	162	nvdimm_map = find_nvdimm_map(dev, offset);
	163	if (!nvdimm_map)
	164	nvdimm_map = alloc_nvdimm_map(dev, offset, size, flags);
	165	else
	166	kref_get(&nvdimm_map->kref);
	167	nvdimm_bus_unlock(dev);
	168
ecfb6d8a DW	169	if (!nvdimm_map)
	170	return NULL;
	171
29b9aa0a DW	172	if (devm_add_action_or_reset(dev, nvdimm_map_put, nvdimm_map))
	173	return NULL;
	174
	175	return nvdimm_map->mem;
	176	}
	177	EXPORT_SYMBOL_GPL(devm_nvdimm_memremap);
	178
eaf96153 DW	179	u64 nd_fletcher64(void *addr, size_t len, bool le)
	180	{
	181	u32 *buf = addr;
	182	u32 lo32 = 0;
	183	u64 hi32 = 0;
	184	int i;
	185
	186	for (i = 0; i < len / sizeof(u32); i++) {
	187	lo32 += le ? le32_to_cpu((__le32) buf[i]) : buf[i];
	188	hi32 += lo32;
	189	}
	190
	191	return hi32 << 32 \| lo32;
	192	}
	193	EXPORT_SYMBOL_GPL(nd_fletcher64);
	194
45def22c DW	195	struct nvdimm_bus_descriptor to_nd_desc(struct nvdimm_bus nvdimm_bus)
	196	{
	197	/* struct nvdimm_bus definition is private to libnvdimm */
	198	return nvdimm_bus->nd_desc;
	199	}
	200	EXPORT_SYMBOL_GPL(to_nd_desc);
	201
37b137ff VV	202	struct device to_nvdimm_bus_dev(struct nvdimm_bus nvdimm_bus)
	203	{
	204	/* struct nvdimm_bus definition is private to libnvdimm */
	205	return &nvdimm_bus->dev;
	206	}
	207	EXPORT_SYMBOL_GPL(to_nvdimm_bus_dev);
	208
bf9bccc1 DW	209	static bool is_uuid_sep(char sep)
	210	{
	211	if (sep == '\n' \|\| sep == '-' \|\| sep == ':' \|\| sep == '\0')
	212	return true;
	213	return false;
	214	}
	215
	216	static int nd_uuid_parse(struct device dev, u8 uuid_out, const char *buf,
	217	size_t len)
	218	{
	219	const char *str = buf;
	220	u8 uuid[16];
	221	int i;
	222
	223	for (i = 0; i < 16; i++) {
	224	if (!isxdigit(str[0]) \|\| !isxdigit(str[1])) {
426824d6 DW	225	dev_dbg(dev, "pos: %d buf[%zd]: %c buf[%zd]: %c\n",
426824d6 DW	226	i, str - buf, str[0],
bf9bccc1 DW	227	str + 1 - buf, str[1]);
	228	return -EINVAL;
	229	}
	230
	231	uuid[i] = (hex_to_bin(str[0]) << 4) \| hex_to_bin(str[1]);
	232	str += 2;
	233	if (is_uuid_sep(*str))
	234	str++;
	235	}
	236
	237	memcpy(uuid_out, uuid, sizeof(uuid));
	238	return 0;
	239	}
	240
	241	/**
	242	* nd_uuid_store: common implementation for writing 'uuid' sysfs attributes
	243	* @dev: container device for the uuid property
	244	* @uuid_out: uuid buffer to replace
	245	* @buf: raw sysfs buffer to parse
	246	*
	247	* Enforce that uuids can only be changed while the device is disabled
	248	* (driver detached)
87a30e1f	249	* LOCKING: expects nd_device_lock() is held on entry
bf9bccc1 DW	250	*/
	251	int nd_uuid_store(struct device dev, u8 uuid_out, const char buf,
	252	size_t len)
	253	{
	254	u8 uuid[16];
	255	int rc;
	256
	257	if (dev->driver)
	258	return -EBUSY;
	259
	260	rc = nd_uuid_parse(dev, uuid, buf, len);
	261	if (rc)
	262	return rc;
	263
	264	kfree(*uuid_out);
	265	*uuid_out = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
	266	if (!(*uuid_out))
	267	return -ENOMEM;
	268
	269	return 0;
	270	}
	271
b2c48f9f	272	ssize_t nd_size_select_show(unsigned long current_size,
1b40e09a DW	273	const unsigned long supported, char buf)
	274	{
	275	ssize_t len = 0;
	276	int i;
	277
	278	for (i = 0; supported[i]; i++)
b2c48f9f	279	if (current_size == supported[i])
1b40e09a DW	280	len += sprintf(buf + len, "[%ld] ", supported[i]);
	281	else
	282	len += sprintf(buf + len, "%ld ", supported[i]);
	283	len += sprintf(buf + len, "\n");
	284	return len;
	285	}
	286
b2c48f9f DW	287	ssize_t nd_size_select_store(struct device dev, const char buf,
b2c48f9f DW	288	unsigned long current_size, const unsigned long supported)
1b40e09a DW	289	{
	290	unsigned long lbasize;
	291	int rc, i;
	292
	293	if (dev->driver)
	294	return -EBUSY;
	295
	296	rc = kstrtoul(buf, 0, &lbasize);
	297	if (rc)
	298	return rc;
	299
	300	for (i = 0; supported[i]; i++)
	301	if (lbasize == supported[i])
	302	break;
	303
	304	if (supported[i]) {
b2c48f9f	305	*current_size = lbasize;
1b40e09a DW	306	return 0;
	307	} else {
	308	return -EINVAL;
	309	}
	310	}
	311
62232e45 DW	312	static ssize_t commands_show(struct device *dev,
	313	struct device_attribute attr, char buf)
	314	{
	315	int cmd, len = 0;
	316	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
	317	struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
	318
e3654eca	319	for_each_set_bit(cmd, &nd_desc->cmd_mask, BITS_PER_LONG)
62232e45 DW	320	len += sprintf(buf + len, "%s ", nvdimm_bus_cmd_name(cmd));
	321	len += sprintf(buf + len, "\n");
	322	return len;
	323	}
	324	static DEVICE_ATTR_RO(commands);
	325
45def22c DW	326	static const char nvdimm_bus_provider(struct nvdimm_bus nvdimm_bus)
	327	{
	328	struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
	329	struct device *parent = nvdimm_bus->dev.parent;
	330
	331	if (nd_desc->provider_name)
	332	return nd_desc->provider_name;
	333	else if (parent)
	334	return dev_name(parent);
	335	else
	336	return "unknown";
	337	}
	338
	339	static ssize_t provider_show(struct device *dev,
	340	struct device_attribute attr, char buf)
	341	{
	342	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
	343
	344	return sprintf(buf, "%s\n", nvdimm_bus_provider(nvdimm_bus));
	345	}
	346	static DEVICE_ATTR_RO(provider);
	347
4d88a97a DW	348	static int flush_namespaces(struct device dev, void data)
4d88a97a DW	349	{
87a30e1f DW	350	nd_device_lock(dev);
87a30e1f DW	351	nd_device_unlock(dev);
4d88a97a DW	352	return 0;
	353	}
	354
	355	static int flush_regions_dimms(struct device dev, void data)
	356	{
87a30e1f DW	357	nd_device_lock(dev);
87a30e1f DW	358	nd_device_unlock(dev);
4d88a97a DW	359	device_for_each_child(dev, NULL, flush_namespaces);
	360	return 0;
	361	}
	362
	363	static ssize_t wait_probe_show(struct device *dev,
	364	struct device_attribute attr, char buf)
	365	{
7ae0fa43 DW	366	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
	367	struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
	368	int rc;
	369
	370	if (nd_desc->flush_probe) {
	371	rc = nd_desc->flush_probe(nd_desc);
	372	if (rc)
	373	return rc;
	374	}
4d88a97a DW	375	nd_synchronize();
	376	device_for_each_child(dev, NULL, flush_regions_dimms);
	377	return sprintf(buf, "1\n");
	378	}
	379	static DEVICE_ATTR_RO(wait_probe);
	380
45def22c	381	static struct attribute *nvdimm_bus_attributes[] = {
62232e45	382	&dev_attr_commands.attr,
4d88a97a	383	&dev_attr_wait_probe.attr,
45def22c DW	384	&dev_attr_provider.attr,
	385	NULL,
	386	};
	387
	388	struct attribute_group nvdimm_bus_attribute_group = {
	389	.attrs = nvdimm_bus_attributes,
	390	};
	391	EXPORT_SYMBOL_GPL(nvdimm_bus_attribute_group);
	392
aa9ad44a	393	int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
87ba05df	394	{
aa9ad44a	395	return badrange_add(&nvdimm_bus->badrange, addr, length);
87ba05df	396	}
aa9ad44a	397	EXPORT_SYMBOL_GPL(nvdimm_bus_add_badrange);
e046114a	398
41cd8b70	399	#ifdef CONFIG_BLK_DEV_INTEGRITY
41cd8b70 VV	400	int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
41cd8b70 VV	401	{
0f8087ec	402	struct blk_integrity bi;
41cd8b70	403
fcae6957 VV	404	if (meta_size == 0)
	405	return 0;
	406
8729bdea JT	407	memset(&bi, 0, sizeof(bi));
8729bdea JT	408
0f8087ec MP	409	bi.tuple_size = meta_size;
	410	bi.tag_size = meta_size;
	411
25520d55	412	blk_integrity_register(disk, &bi);
41cd8b70 VV	413	blk_queue_max_integrity_segments(disk->queue, 1);
	414
	415	return 0;
	416	}
	417	EXPORT_SYMBOL(nd_integrity_init);
	418
	419	#else /* CONFIG_BLK_DEV_INTEGRITY */
	420	int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
	421	{
	422	return 0;
	423	}
	424	EXPORT_SYMBOL(nd_integrity_init);
	425
	426	#endif
	427
45def22c DW	428	static __init int libnvdimm_init(void)
45def22c DW	429	{
4d88a97a DW	430	int rc;
	431
	432	rc = nvdimm_bus_init();
	433	if (rc)
	434	return rc;
	435	rc = nvdimm_init();
	436	if (rc)
	437	goto err_dimm;
3d88002e DW	438	rc = nd_region_init();
	439	if (rc)
	440	goto err_region;
b3fde74e DW	441
	442	nd_label_init();
	443
4d88a97a	444	return 0;
3d88002e DW	445	err_region:
3d88002e DW	446	nvdimm_exit();
4d88a97a DW	447	err_dimm:
	448	nvdimm_bus_exit();
	449	return rc;
45def22c DW	450	}
	451
	452	static __exit void libnvdimm_exit(void)
	453	{
	454	WARN_ON(!list_empty(&nvdimm_bus_list));
3d88002e	455	nd_region_exit();
4d88a97a	456	nvdimm_exit();
45def22c	457	nvdimm_bus_exit();
b354aba0 DW	458	nd_region_devs_exit();
b354aba0 DW	459	nvdimm_devs_exit();
45def22c DW	460	}
45def22c DW	461
b94d5230 DW	462	MODULE_LICENSE("GPL v2");
b94d5230 DW	463	MODULE_AUTHOR("Intel Corporation");
45def22c DW	464	subsys_initcall(libnvdimm_init);
45def22c DW	465	module_exit(libnvdimm_exit);