84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
|
/*
|
||
|
|
* 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/slab.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include "nd-core.h"
|
||
|
|
|
||
|
|
static int nvdimm_bus_major;
|
||
|
|
static struct class *nd_class;
|
||
|
|
|
||
|
|
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 = register_chrdev(0, "ndctl", &nvdimm_bus_fops);
|
||
|
|
if (rc < 0)
|
||
|
|
return rc;
|
||
|
|
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");
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
void __exit nvdimm_bus_exit(void)
|
||
|
|
{
|
||
|
|
class_destroy(nd_class);
|
||
|
|
unregister_chrdev(nvdimm_bus_major, "ndctl");
|
||
|
|
}
|