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/*
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
#include <linux/ndctl.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include "nd-core.h"
static DEFINE_IDA(dimm_ida);
static void nvdimm_release(struct device *dev)
{
struct nvdimm *nvdimm = to_nvdimm(dev);
ida_simple_remove(&dimm_ida, nvdimm->id);
kfree(nvdimm);
}
static struct device_type nvdimm_device_type = {
.name = "nvdimm",
.release = nvdimm_release,
};
bool is_nvdimm(struct device *dev)
{
return dev->type == &nvdimm_device_type;
}
struct nvdimm *to_nvdimm(struct device *dev)
{
struct nvdimm *nvdimm = container_of(dev, struct nvdimm, dev);
WARN_ON(!is_nvdimm(dev));
return nvdimm;
}
EXPORT_SYMBOL_GPL(to_nvdimm);
const char *nvdimm_name(struct nvdimm *nvdimm)
{
return dev_name(&nvdimm->dev);
}
EXPORT_SYMBOL_GPL(nvdimm_name);
void *nvdimm_provider_data(struct nvdimm *nvdimm)
{
if (nvdimm)
return nvdimm->provider_data;
return NULL;
}
EXPORT_SYMBOL_GPL(nvdimm_provider_data);
static ssize_t commands_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvdimm *nvdimm = to_nvdimm(dev);
int cmd, len = 0;
if (!nvdimm->dsm_mask)
return sprintf(buf, "\n");
for_each_set_bit(cmd, nvdimm->dsm_mask, BITS_PER_LONG)
len += sprintf(buf + len, "%s ", nvdimm_cmd_name(cmd));
len += sprintf(buf + len, "\n");
return len;
}
static DEVICE_ATTR_RO(commands);
static struct attribute *nvdimm_attributes[] = {
&dev_attr_commands.attr,
NULL,
};
struct attribute_group nvdimm_attribute_group = {
.attrs = nvdimm_attributes,
};
EXPORT_SYMBOL_GPL(nvdimm_attribute_group);
struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
const struct attribute_group **groups, unsigned long flags,
unsigned long *dsm_mask)
{
struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL);
struct device *dev;
if (!nvdimm)
return NULL;
nvdimm->id = ida_simple_get(&dimm_ida, 0, 0, GFP_KERNEL);
if (nvdimm->id < 0) {
kfree(nvdimm);
return NULL;
}
nvdimm->provider_data = provider_data;
nvdimm->flags = flags;
nvdimm->dsm_mask = dsm_mask;
dev = &nvdimm->dev;
dev_set_name(dev, "nmem%d", nvdimm->id);
dev->parent = &nvdimm_bus->dev;
dev->type = &nvdimm_device_type;
dev->bus = &nvdimm_bus_type;
dev->devt = MKDEV(nvdimm_major, nvdimm->id);
dev->groups = groups;
if (device_register(dev) != 0) {
put_device(dev);
return NULL;
}
return nvdimm;
}
EXPORT_SYMBOL_GPL(nvdimm_create);
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