kernel/include/uapi/linux/ndctl.h

   1 /*
   2  * Copyright (c) 2014-2015, Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU Lesser General Public License,
   6  * version 2.1, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT ANY
   9  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  10  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
  11  * more details.
  12  */
  13 #ifndef __NDCTL_H__
  14 #define __NDCTL_H__
  15
  16 #include <linux/types.h>
  17
  18 struct nd_cmd_smart {
  19         __u32 status;
  20         __u8 data[128];
  21 } __packed;
  22
  23 struct nd_cmd_smart_threshold {
  24         __u32 status;
  25         __u8 data[8];
  26 } __packed;
  27
  28 struct nd_cmd_dimm_flags {
  29         __u32 status;
  30         __u32 flags;
  31 } __packed;
  32
  33 struct nd_cmd_get_config_size {
  34         __u32 status;
  35         __u32 config_size;
  36         __u32 max_xfer;
  37 } __packed;
  38
  39 struct nd_cmd_get_config_data_hdr {
  40         __u32 in_offset;
  41         __u32 in_length;
  42         __u32 status;
  43         __u8 out_buf[0];
  44 } __packed;
  45
  46 struct nd_cmd_set_config_hdr {
  47         __u32 in_offset;
  48         __u32 in_length;
  49         __u8 in_buf[0];
  50 } __packed;
  51
  52 struct nd_cmd_vendor_hdr {
  53         __u32 opcode;
  54         __u32 in_length;
  55         __u8 in_buf[0];
  56 } __packed;
  57
  58 struct nd_cmd_vendor_tail {
  59         __u32 status;
  60         __u32 out_length;
  61         __u8 out_buf[0];
  62 } __packed;
  63
  64 struct nd_cmd_ars_cap {
  65         __u64 address;
  66         __u64 length;
  67         __u32 status;
  68         __u32 max_ars_out;
  69 } __packed;
  70
  71 struct nd_cmd_ars_start {
  72         __u64 address;
  73         __u64 length;
  74         __u16 type;
  75         __u8 reserved[6];
  76         __u32 status;
  77 } __packed;
  78
  79 struct nd_cmd_ars_status {
  80         __u32 status;
  81         __u32 out_length;
  82         __u64 address;
  83         __u64 length;
  84         __u16 type;
  85         __u32 num_records;
  86         struct nd_ars_record {
  87                 __u32 handle;
  88                 __u32 flags;
  89                 __u64 err_address;
  90                 __u64 length;
  91         } __packed records[0];
  92 } __packed;
  93
  94 enum {
  95         ND_CMD_IMPLEMENTED = 0,
  96
  97         /* bus commands */
  98         ND_CMD_ARS_CAP = 1,
  99         ND_CMD_ARS_START = 2,
 100         ND_CMD_ARS_STATUS = 3,
 101
 102         /* per-dimm commands */
 103         ND_CMD_SMART = 1,
 104         ND_CMD_SMART_THRESHOLD = 2,
 105         ND_CMD_DIMM_FLAGS = 3,
 106         ND_CMD_GET_CONFIG_SIZE = 4,
 107         ND_CMD_GET_CONFIG_DATA = 5,
 108         ND_CMD_SET_CONFIG_DATA = 6,
 109         ND_CMD_VENDOR_EFFECT_LOG_SIZE = 7,
 110         ND_CMD_VENDOR_EFFECT_LOG = 8,
 111         ND_CMD_VENDOR = 9,
 112 };
 113
 114 enum {
 115         ND_ARS_VOLATILE = 1,
 116         ND_ARS_PERSISTENT = 2,
 117 };
 118
 119 static inline const char *nvdimm_bus_cmd_name(unsigned cmd)
 120 {
 121         static const char * const names[] = {
 122                 [ND_CMD_ARS_CAP] = "ars_cap",
 123                 [ND_CMD_ARS_START] = "ars_start",
 124                 [ND_CMD_ARS_STATUS] = "ars_status",
 125         };
 126
 127         if (cmd < ARRAY_SIZE(names) && names[cmd])
 128                 return names[cmd];
 129         return "unknown";
 130 }
 131
 132 static inline const char *nvdimm_cmd_name(unsigned cmd)
 133 {
 134         static const char * const names[] = {
 135                 [ND_CMD_SMART] = "smart",
 136                 [ND_CMD_SMART_THRESHOLD] = "smart_thresh",
 137                 [ND_CMD_DIMM_FLAGS] = "flags",
 138                 [ND_CMD_GET_CONFIG_SIZE] = "get_size",
 139                 [ND_CMD_GET_CONFIG_DATA] = "get_data",
 140                 [ND_CMD_SET_CONFIG_DATA] = "set_data",
 141                 [ND_CMD_VENDOR_EFFECT_LOG_SIZE] = "effect_size",
 142                 [ND_CMD_VENDOR_EFFECT_LOG] = "effect_log",
 143                 [ND_CMD_VENDOR] = "vendor",
 144         };
 145
 146         if (cmd < ARRAY_SIZE(names) && names[cmd])
 147                 return names[cmd];
 148         return "unknown";
 149 }
 150
 151 #define ND_IOCTL 'N'
 152
 153 #define ND_IOCTL_SMART                  _IOWR(ND_IOCTL, ND_CMD_SMART,\
 154                                         struct nd_cmd_smart)
 155
 156 #define ND_IOCTL_SMART_THRESHOLD        _IOWR(ND_IOCTL, ND_CMD_SMART_THRESHOLD,\
 157                                         struct nd_cmd_smart_threshold)
 158
 159 #define ND_IOCTL_DIMM_FLAGS             _IOWR(ND_IOCTL, ND_CMD_DIMM_FLAGS,\
 160                                         struct nd_cmd_dimm_flags)
 161
 162 #define ND_IOCTL_GET_CONFIG_SIZE        _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_SIZE,\
 163                                         struct nd_cmd_get_config_size)
 164
 165 #define ND_IOCTL_GET_CONFIG_DATA        _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_DATA,\
 166                                         struct nd_cmd_get_config_data_hdr)
 167
 168 #define ND_IOCTL_SET_CONFIG_DATA        _IOWR(ND_IOCTL, ND_CMD_SET_CONFIG_DATA,\
 169                                         struct nd_cmd_set_config_hdr)
 170
 171 #define ND_IOCTL_VENDOR                 _IOWR(ND_IOCTL, ND_CMD_VENDOR,\
 172                                         struct nd_cmd_vendor_hdr)
 173
 174 #define ND_IOCTL_ARS_CAP                _IOWR(ND_IOCTL, ND_CMD_ARS_CAP,\
 175                                         struct nd_cmd_ars_cap)
 176
 177 #define ND_IOCTL_ARS_START              _IOWR(ND_IOCTL, ND_CMD_ARS_START,\
 178                                         struct nd_cmd_ars_start)
 179
 180 #define ND_IOCTL_ARS_STATUS             _IOWR(ND_IOCTL, ND_CMD_ARS_STATUS,\
 181                                         struct nd_cmd_ars_status)
 182
 183 #define ND_DEVICE_DIMM 1            /* nd_dimm: container for "config data" */
 184 #define ND_DEVICE_REGION_PMEM 2     /* nd_region: (parent of PMEM namespaces) */
 185 #define ND_DEVICE_REGION_BLK 3      /* nd_region: (parent of BLK namespaces) */
 186 #define ND_DEVICE_NAMESPACE_IO 4    /* legacy persistent memory */
 187 #define ND_DEVICE_NAMESPACE_PMEM 5  /* PMEM namespace (may alias with BLK) */
 188 #define ND_DEVICE_NAMESPACE_BLK 6   /* BLK namespace (may alias with PMEM) */
 189
 190 enum nd_driver_flags {
 191         ND_DRIVER_DIMM            = 1 << ND_DEVICE_DIMM,
 192         ND_DRIVER_REGION_PMEM     = 1 << ND_DEVICE_REGION_PMEM,
 193         ND_DRIVER_REGION_BLK      = 1 << ND_DEVICE_REGION_BLK,
 194         ND_DRIVER_NAMESPACE_IO    = 1 << ND_DEVICE_NAMESPACE_IO,
 195         ND_DRIVER_NAMESPACE_PMEM  = 1 << ND_DEVICE_NAMESPACE_PMEM,
 196         ND_DRIVER_NAMESPACE_BLK   = 1 << ND_DEVICE_NAMESPACE_BLK,
 197 };
 198
 199 enum {
 200         ND_MIN_NAMESPACE_SIZE = 0x00400000,
 201 };
 202
 203 enum ars_masks {
 204         ARS_STATUS_MASK = 0x0000FFFF,
 205         ARS_EXT_STATUS_SHIFT = 16,
 206 };
 207 #endif /* __NDCTL_H__ */