These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / include / uapi / linux / lightnvm.h
1 /*
2  * Copyright (C) 2015 CNEX Labs.  All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License version
6  * 2 as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful, but
9  * WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11  * General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; see the file COPYING.  If not, write to
15  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
16  * USA.
17  */
18
19 #ifndef _UAPI_LINUX_LIGHTNVM_H
20 #define _UAPI_LINUX_LIGHTNVM_H
21
22 #ifdef __KERNEL__
23 #include <linux/kernel.h>
24 #include <linux/ioctl.h>
25 #else /* __KERNEL__ */
26 #include <stdio.h>
27 #include <sys/ioctl.h>
28 #define DISK_NAME_LEN 32
29 #endif /* __KERNEL__ */
30
31 #include <linux/types.h>
32 #include <linux/ioctl.h>
33
34 #define NVM_TTYPE_NAME_MAX 48
35 #define NVM_TTYPE_MAX 63
36
37 #define NVM_CTRL_FILE "/dev/lightnvm/control"
38
39 struct nvm_ioctl_info_tgt {
40         __u32 version[3];
41         __u32 reserved;
42         char tgtname[NVM_TTYPE_NAME_MAX];
43 };
44
45 struct nvm_ioctl_info {
46         __u32 version[3];       /* in/out - major, minor, patch */
47         __u16 tgtsize;          /* number of targets */
48         __u16 reserved16;       /* pad to 4K page */
49         __u32 reserved[12];
50         struct nvm_ioctl_info_tgt tgts[NVM_TTYPE_MAX];
51 };
52
53 enum {
54         NVM_DEVICE_ACTIVE = 1 << 0,
55 };
56
57 struct nvm_ioctl_device_info {
58         char devname[DISK_NAME_LEN];
59         char bmname[NVM_TTYPE_NAME_MAX];
60         __u32 bmversion[3];
61         __u32 flags;
62         __u32 reserved[8];
63 };
64
65 struct nvm_ioctl_get_devices {
66         __u32 nr_devices;
67         __u32 reserved[31];
68         struct nvm_ioctl_device_info info[31];
69 };
70
71 struct nvm_ioctl_create_simple {
72         __u32 lun_begin;
73         __u32 lun_end;
74 };
75
76 enum {
77         NVM_CONFIG_TYPE_SIMPLE = 0,
78 };
79
80 struct nvm_ioctl_create_conf {
81         __u32 type;
82         union {
83                 struct nvm_ioctl_create_simple s;
84         };
85 };
86
87 struct nvm_ioctl_create {
88         char dev[DISK_NAME_LEN];                /* open-channel SSD device */
89         char tgttype[NVM_TTYPE_NAME_MAX];       /* target type name */
90         char tgtname[DISK_NAME_LEN];            /* dev to expose target as */
91
92         __u32 flags;
93
94         struct nvm_ioctl_create_conf conf;
95 };
96
97 struct nvm_ioctl_remove {
98         char tgtname[DISK_NAME_LEN];
99
100         __u32 flags;
101 };
102
103
104 /* The ioctl type, 'L', 0x20 - 0x2F documented in ioctl-number.txt */
105 enum {
106         /* top level cmds */
107         NVM_INFO_CMD = 0x20,
108         NVM_GET_DEVICES_CMD,
109
110         /* device level cmds */
111         NVM_DEV_CREATE_CMD,
112         NVM_DEV_REMOVE_CMD,
113 };
114
115 #define NVM_IOCTL 'L' /* 0x4c */
116
117 #define NVM_INFO                _IOWR(NVM_IOCTL, NVM_INFO_CMD, \
118                                                 struct nvm_ioctl_info)
119 #define NVM_GET_DEVICES         _IOR(NVM_IOCTL, NVM_GET_DEVICES_CMD, \
120                                                 struct nvm_ioctl_get_devices)
121 #define NVM_DEV_CREATE          _IOW(NVM_IOCTL, NVM_DEV_CREATE_CMD, \
122                                                 struct nvm_ioctl_create)
123 #define NVM_DEV_REMOVE          _IOW(NVM_IOCTL, NVM_DEV_REMOVE_CMD, \
124                                                 struct nvm_ioctl_remove)
125
126 #define NVM_VERSION_MAJOR       1
127 #define NVM_VERSION_MINOR       0
128 #define NVM_VERSION_PATCHLEVEL  0
129
130 #endif