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/*
* Copyright (C) 2015 CNEX Labs. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
* USA.
*/
#ifndef _UAPI_LINUX_LIGHTNVM_H
#define _UAPI_LINUX_LIGHTNVM_H
#ifdef __KERNEL__
#include <linux/kernel.h>
#include <linux/ioctl.h>
#else /* __KERNEL__ */
#include <stdio.h>
#include <sys/ioctl.h>
#define DISK_NAME_LEN 32
#endif /* __KERNEL__ */
#include <linux/types.h>
#include <linux/ioctl.h>
#define NVM_TTYPE_NAME_MAX 48
#define NVM_TTYPE_MAX 63
#define NVM_MMTYPE_LEN 8
#define NVM_CTRL_FILE "/dev/lightnvm/control"
struct nvm_ioctl_info_tgt {
__u32 version[3];
__u32 reserved;
char tgtname[NVM_TTYPE_NAME_MAX];
};
struct nvm_ioctl_info {
__u32 version[3]; /* in/out - major, minor, patch */
__u16 tgtsize; /* number of targets */
__u16 reserved16; /* pad to 4K page */
__u32 reserved[12];
struct nvm_ioctl_info_tgt tgts[NVM_TTYPE_MAX];
};
enum {
NVM_DEVICE_ACTIVE = 1 << 0,
};
struct nvm_ioctl_device_info {
char devname[DISK_NAME_LEN];
char bmname[NVM_TTYPE_NAME_MAX];
__u32 bmversion[3];
__u32 flags;
__u32 reserved[8];
};
struct nvm_ioctl_get_devices {
__u32 nr_devices;
__u32 reserved[31];
struct nvm_ioctl_device_info info[31];
};
struct nvm_ioctl_create_simple {
__u32 lun_begin;
__u32 lun_end;
};
enum {
NVM_CONFIG_TYPE_SIMPLE = 0,
};
struct nvm_ioctl_create_conf {
__u32 type;
union {
struct nvm_ioctl_create_simple s;
};
};
struct nvm_ioctl_create {
char dev[DISK_NAME_LEN]; /* open-channel SSD device */
char tgttype[NVM_TTYPE_NAME_MAX]; /* target type name */
char tgtname[DISK_NAME_LEN]; /* dev to expose target as */
__u32 flags;
struct nvm_ioctl_create_conf conf;
};
struct nvm_ioctl_remove {
char tgtname[DISK_NAME_LEN];
__u32 flags;
};
struct nvm_ioctl_dev_init {
char dev[DISK_NAME_LEN]; /* open-channel SSD device */
char mmtype[NVM_MMTYPE_LEN]; /* register to media manager */
__u32 flags;
};
/* The ioctl type, 'L', 0x20 - 0x2F documented in ioctl-number.txt */
enum {
/* top level cmds */
NVM_INFO_CMD = 0x20,
NVM_GET_DEVICES_CMD,
/* device level cmds */
NVM_DEV_CREATE_CMD,
NVM_DEV_REMOVE_CMD,
/* Init a device to support LightNVM media managers */
NVM_DEV_INIT_CMD,
};
#define NVM_IOCTL 'L' /* 0x4c */
#define NVM_INFO _IOWR(NVM_IOCTL, NVM_INFO_CMD, \
struct nvm_ioctl_info)
#define NVM_GET_DEVICES _IOR(NVM_IOCTL, NVM_GET_DEVICES_CMD, \
struct nvm_ioctl_get_devices)
#define NVM_DEV_CREATE _IOW(NVM_IOCTL, NVM_DEV_CREATE_CMD, \
struct nvm_ioctl_create)
#define NVM_DEV_REMOVE _IOW(NVM_IOCTL, NVM_DEV_REMOVE_CMD, \
struct nvm_ioctl_remove)
#define NVM_DEV_INIT _IOW(NVM_IOCTL, NVM_DEV_INIT_CMD, \
struct nvm_ioctl_dev_init)
#define NVM_VERSION_MAJOR 1
#define NVM_VERSION_MINOR 0
#define NVM_VERSION_PATCHLEVEL 0
#endif
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