/*
 * Copyright(c) 2012-2022 Intel Corporation
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <linux/module.h>
#include <linux/fs.h>
#include <linux/vmalloc.h>
#include "cas_disk_defs.h"
#include "cas_disk.h"
#include "disk.h"
#include "exp_obj.h"

/* Layer information. */
MODULE_AUTHOR("Intel(R) Corporation");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(CAS_VERSION);

static int iface_version = CASDSK_IFACE_VERSION;
module_param(iface_version, int, (S_IRUSR | S_IRGRP));

struct casdsk_module *casdsk_module;

uint32_t casdsk_get_version(void)
{
	return CASDSK_IFACE_VERSION;
}
EXPORT_SYMBOL(casdsk_get_version);

static int __init casdsk_init_module(void)
{
	int result = 0;

	casdsk_module = kzalloc(sizeof(*casdsk_module), GFP_KERNEL);
	if (!casdsk_module) {
		result = -ENOMEM;
		goto error_kmalloc;
	}

	mutex_init(&casdsk_module->lock);

	mutex_lock(&casdsk_module->lock);

	result = casdsk_init_exp_objs();
	if (result)
		goto error_init_exp_objs;

	result = casdsk_init_disks();
	if (result)
		goto error_init_disks;

	mutex_unlock(&casdsk_module->lock);

	printk(KERN_INFO "%s Version %s (%s)::Module loaded successfully\n",
		CASDSK_LOGO, CAS_VERSION, CAS_KERNEL);

	return result;

error_init_disks:
	casdsk_deinit_exp_objs();
error_init_exp_objs:
	mutex_unlock(&casdsk_module->lock);
	kfree(casdsk_module);
error_kmalloc:
	return result;
}
module_init(casdsk_init_module);

static void __exit casdsk_exit_module(void)
{
	casdsk_deinit_disks();
	casdsk_deinit_exp_objs();
	kfree(casdsk_module);
}
module_exit(casdsk_exit_module);