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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 |