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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/uaccess.h>
#include <linux/fcntl.h>
#include <linux/async.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/io.h>
#include "nd-core.h"
static int nvdimm_bus_major;
static struct class *nd_class;
struct bus_type nvdimm_bus_type = {
.name = "nd",
};
int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus)
{
dev_t devt = MKDEV(nvdimm_bus_major, nvdimm_bus->id);
struct device *dev;
dev = device_create(nd_class, &nvdimm_bus->dev, devt, nvdimm_bus,
"ndctl%d", nvdimm_bus->id);
if (IS_ERR(dev)) {
dev_dbg(&nvdimm_bus->dev, "failed to register ndctl%d: %ld\n",
nvdimm_bus->id, PTR_ERR(dev));
return PTR_ERR(dev);
}
return 0;
}
void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus)
{
device_destroy(nd_class, MKDEV(nvdimm_bus_major, nvdimm_bus->id));
}
static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
return -ENXIO;
}
static const struct file_operations nvdimm_bus_fops = {
.owner = THIS_MODULE,
.open = nonseekable_open,
.unlocked_ioctl = nd_ioctl,
.compat_ioctl = nd_ioctl,
.llseek = noop_llseek,
};
int __init nvdimm_bus_init(void)
{
int rc;
rc = bus_register(&nvdimm_bus_type);
if (rc)
return rc;
rc = register_chrdev(0, "ndctl", &nvdimm_bus_fops);
if (rc < 0)
goto err_chrdev;
nvdimm_bus_major = rc;
nd_class = class_create(THIS_MODULE, "nd");
if (IS_ERR(nd_class))
goto err_class;
return 0;
err_class:
unregister_chrdev(nvdimm_bus_major, "ndctl");
err_chrdev:
bus_unregister(&nvdimm_bus_type);
return rc;
}
void __exit nvdimm_bus_exit(void)
{
class_destroy(nd_class);
unregister_chrdev(nvdimm_bus_major, "ndctl");
bus_unregister(&nvdimm_bus_type);
}
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