// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
* Initial release: Matias Bjorling <m@bjorling.me>
*/
#define pr_fmt(fmt) "nvm: " fmt
#include <linux/list.h>
#include <linux/types.h>
#include <linux/sem.h>
#include <linux/bitmap.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/miscdevice.h>
#include <linux/lightnvm.h>
#include <linux/sched/sysctl.h>
static LIST_HEAD(nvm_tgt_types);
static DECLARE_RWSEM(nvm_tgtt_lock);
static LIST_HEAD(nvm_devices);
static DECLARE_RWSEM(nvm_lock);
/* Map between virtual and physical channel and lun */
struct nvm_ch_map {
int ch_off;
int num_lun;
int *lun_offs;
};
struct nvm_dev_map {
struct nvm_ch_map *chnls;
int num_ch;
};
static void nvm_free(struct kref *ref);
static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
{
struct nvm_target *tgt;
list_for_each_entry(tgt, &dev->targets, list)
if (!strcmp(name, tgt->disk->disk_name))
return tgt;
return NULL;
}
static bool nvm_target_exists(const char *name)
{
struct nvm_dev *dev;
struct nvm_target *tgt;
bool ret = false;
down_write(&nvm_lock);
list_for_each_entry(dev, &nvm_devices, devices) {
mutex_lock(&dev->mlock);
list_for_each_entry(tgt, &dev->targets, list) {
