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// SPDX-License-Identifier: GPL-2.0
/*
* Provide diagnose information via misc device /dev/diag.
*
* Copyright IBM Corp. 2024
*/
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/types.h>
#include <uapi/asm/diag.h>
#include "diag_ioctl.h"
static long diag_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
long rc;
switch (cmd) {
case DIAG324_GET_PIBLEN:
rc = diag324_piblen(arg);
break;
case DIAG324_GET_PIBBUF:
rc = diag324_pibbuf(arg);
break;
case DIAG310_GET_STRIDE:
rc = diag310_memtop_stride(arg);
break;
case DIAG310_GET_MEMTOPLEN:
rc = diag310_memtop_len(arg);
break;
case DIAG310_GET_MEMTOPBUF:
rc = diag310_memtop_buf(arg);
break;
default:
rc = -ENOIOCTLCMD;
break;
}
return rc;
}
static const struct file_operations fops = {
.owner = THIS_MODULE,
.open = nonseekable_open,
.unlocked_ioctl = diag_ioctl,
};
static struct miscdevice diagdev = {
.name = "diag",
.minor = MISC_DYNAMIC_MINOR,
.fops = &fops,
.mode = 0444,
};
static int diag_init(void)
{
return misc_register(&diagdev);
}
device_initcall(diag_init);
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