Release 4.7 include/uapi/linux/lightnvm.h

/*
 * 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;
};

enum {
	
NVM_FACTORY_ERASE_ONLY_USER	= 1 << 0, /* erase only blocks used as
                                                   * host blks or grown blks */
	
NVM_FACTORY_RESET_HOST_BLKS	= 1 << 1, /* remove host blk marks */
	
NVM_FACTORY_RESET_GRWN_BBLKS	= 1 << 2, /* remove grown blk marks */
	
NVM_FACTORY_NR_BITS		= 1 << 3, /* stops here */
};


struct nvm_ioctl_dev_factory {
	
char dev[DISK_NAME_LEN];

	
__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,

	/* Factory reset device */
	
NVM_DEV_FACTORY_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_DEV_FACTORY		_IOW(NVM_IOCTL, NVM_DEV_FACTORY_CMD, \
                                                struct nvm_ioctl_dev_factory)


#define NVM_VERSION_MAJOR	1

#define NVM_VERSION_MINOR	0

#define NVM_VERSION_PATCHLEVEL	0

#endif
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Directory: include/uapi/linux

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