include/uapi/linux/ndctl.h

   1 /*
   2  * Copyright (c) 2014-2016, 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_dimm_flags {
  19         __u32 status;
  20         __u32 flags;
  21 } __packed;
  22
  23 struct nd_cmd_get_config_size {
  24         __u32 status;
  25         __u32 config_size;
  26         __u32 max_xfer;
  27 } __packed;
  28
  29 struct nd_cmd_get_config_data_hdr {
  30         __u32 in_offset;
  31         __u32 in_length;
  32         __u32 status;
  33         __u8 out_buf[0];
  34 } __packed;
  35
  36 struct nd_cmd_set_config_hdr {
  37         __u32 in_offset;
  38         __u32 in_length;
  39         __u8 in_buf[0];
  40 } __packed;
  41
  42 struct nd_cmd_vendor_hdr {
  43         __u32 opcode;
  44         __u32 in_length;
  45         __u8 in_buf[0];
  46 } __packed;
  47
  48 struct nd_cmd_vendor_tail {
  49         __u32 status;
  50         __u32 out_length;
  51         __u8 out_buf[0];
  52 } __packed;
  53
  54 struct nd_cmd_ars_cap {
  55         __u64 address;
  56         __u64 length;
  57         __u32 status;
  58         __u32 max_ars_out;
  59         __u32 clear_err_unit;
  60         __u16 flags;
  61         __u16 reserved;
  62 } __packed;
  63
  64 struct nd_cmd_ars_start {
  65         __u64 address;
  66         __u64 length;
  67         __u16 type;
  68         __u8 flags;
  69         __u8 reserved[5];
  70         __u32 status;
  71         __u32 scrub_time;
  72 } __packed;
  73
  74 struct nd_cmd_ars_status {
  75         __u32 status;
  76         __u32 out_length;
  77         __u64 address;
  78         __u64 length;
  79         __u64 restart_address;
  80         __u64 restart_length;
  81         __u16 type;
  82         __u16 flags;
  83         __u32 num_records;
  84         struct nd_ars_record {
  85                 __u32 handle;
  86                 __u32 reserved;
  87                 __u64 err_address;
  88                 __u64 length;
  89         } __packed records[0];
  90 } __packed;
  91
  92 struct nd_cmd_clear_error {
  93         __u64 address;
  94         __u64 length;
  95         __u32 status;
  96         __u8 reserved[4];
  97         __u64 cleared;
  98 } __packed;
  99
 100 enum {
 101         ND_CMD_IMPLEMENTED = 0,
 102
 103         /* bus commands */
 104         ND_CMD_ARS_CAP = 1,
 105         ND_CMD_ARS_START = 2,
 106         ND_CMD_ARS_STATUS = 3,
 107         ND_CMD_CLEAR_ERROR = 4,
 108
 109         /* per-dimm commands */
 110         ND_CMD_SMART = 1,
 111         ND_CMD_SMART_THRESHOLD = 2,
 112         ND_CMD_DIMM_FLAGS = 3,
 113         ND_CMD_GET_CONFIG_SIZE = 4,
 114         ND_CMD_GET_CONFIG_DATA = 5,
 115         ND_CMD_SET_CONFIG_DATA = 6,
 116         ND_CMD_VENDOR_EFFECT_LOG_SIZE = 7,
 117         ND_CMD_VENDOR_EFFECT_LOG = 8,
 118         ND_CMD_VENDOR = 9,
 119         ND_CMD_CALL = 10,
 120 };
 121
 122 enum {
 123         ND_ARS_VOLATILE = 1,
 124         ND_ARS_PERSISTENT = 2,
 125         ND_ARS_RETURN_PREV_DATA = 1 << 1,
 126         ND_CONFIG_LOCKED = 1,
 127 };
 128
 129 static inline const char *nvdimm_bus_cmd_name(unsigned cmd)
 130 {
 131         static const char * const names[] = {
 132                 [ND_CMD_ARS_CAP] = "ars_cap",
 133                 [ND_CMD_ARS_START] = "ars_start",
 134                 [ND_CMD_ARS_STATUS] = "ars_status",
 135                 [ND_CMD_CLEAR_ERROR] = "clear_error",
 136                 [ND_CMD_CALL] = "cmd_call",
 137         };
 138
 139         if (cmd < ARRAY_SIZE(names) && names[cmd])
 140                 return names[cmd];
 141         return "unknown";
 142 }
 143
 144 static inline const char *nvdimm_cmd_name(unsigned cmd)
 145 {
 146         static const char * const names[] = {
 147                 [ND_CMD_SMART] = "smart",
 148                 [ND_CMD_SMART_THRESHOLD] = "smart_thresh",
 149                 [ND_CMD_DIMM_FLAGS] = "flags",
 150                 [ND_CMD_GET_CONFIG_SIZE] = "get_size",
 151                 [ND_CMD_GET_CONFIG_DATA] = "get_data",
 152                 [ND_CMD_SET_CONFIG_DATA] = "set_data",
 153                 [ND_CMD_VENDOR_EFFECT_LOG_SIZE] = "effect_size",
 154                 [ND_CMD_VENDOR_EFFECT_LOG] = "effect_log",
 155                 [ND_CMD_VENDOR] = "vendor",
 156                 [ND_CMD_CALL] = "cmd_call",
 157         };
 158
 159         if (cmd < ARRAY_SIZE(names) && names[cmd])
 160                 return names[cmd];
 161         return "unknown";
 162 }
 163
 164 #define ND_IOCTL 'N'
 165
 166 #define ND_IOCTL_DIMM_FLAGS             _IOWR(ND_IOCTL, ND_CMD_DIMM_FLAGS,\
 167                                         struct nd_cmd_dimm_flags)
 168
 169 #define ND_IOCTL_GET_CONFIG_SIZE        _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_SIZE,\
 170                                         struct nd_cmd_get_config_size)
 171
 172 #define ND_IOCTL_GET_CONFIG_DATA        _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_DATA,\
 173                                         struct nd_cmd_get_config_data_hdr)
 174
 175 #define ND_IOCTL_SET_CONFIG_DATA        _IOWR(ND_IOCTL, ND_CMD_SET_CONFIG_DATA,\
 176                                         struct nd_cmd_set_config_hdr)
 177
 178 #define ND_IOCTL_VENDOR                 _IOWR(ND_IOCTL, ND_CMD_VENDOR,\
 179                                         struct nd_cmd_vendor_hdr)
 180
 181 #define ND_IOCTL_ARS_CAP                _IOWR(ND_IOCTL, ND_CMD_ARS_CAP,\
 182                                         struct nd_cmd_ars_cap)
 183
 184 #define ND_IOCTL_ARS_START              _IOWR(ND_IOCTL, ND_CMD_ARS_START,\
 185                                         struct nd_cmd_ars_start)
 186
 187 #define ND_IOCTL_ARS_STATUS             _IOWR(ND_IOCTL, ND_CMD_ARS_STATUS,\
 188                                         struct nd_cmd_ars_status)
 189
 190 #define ND_IOCTL_CLEAR_ERROR            _IOWR(ND_IOCTL, ND_CMD_CLEAR_ERROR,\
 191                                         struct nd_cmd_clear_error)
 192
 193 #define ND_DEVICE_DIMM 1            /* nd_dimm: container for "config data" */
 194 #define ND_DEVICE_REGION_PMEM 2     /* nd_region: (parent of PMEM namespaces) */
 195 #define ND_DEVICE_REGION_BLK 3      /* nd_region: (parent of BLK namespaces) */
 196 #define ND_DEVICE_NAMESPACE_IO 4    /* legacy persistent memory */
 197 #define ND_DEVICE_NAMESPACE_PMEM 5  /* PMEM namespace (may alias with BLK) */
 198 #define ND_DEVICE_NAMESPACE_BLK 6   /* BLK namespace (may alias with PMEM) */
 199 #define ND_DEVICE_DAX_PMEM 7        /* Device DAX interface to pmem */
 200
 201 enum nd_driver_flags {
 202         ND_DRIVER_DIMM            = 1 << ND_DEVICE_DIMM,
 203         ND_DRIVER_REGION_PMEM     = 1 << ND_DEVICE_REGION_PMEM,
 204         ND_DRIVER_REGION_BLK      = 1 << ND_DEVICE_REGION_BLK,
 205         ND_DRIVER_NAMESPACE_IO    = 1 << ND_DEVICE_NAMESPACE_IO,
 206         ND_DRIVER_NAMESPACE_PMEM  = 1 << ND_DEVICE_NAMESPACE_PMEM,
 207         ND_DRIVER_NAMESPACE_BLK   = 1 << ND_DEVICE_NAMESPACE_BLK,
 208         ND_DRIVER_DAX_PMEM        = 1 << ND_DEVICE_DAX_PMEM,
 209 };
 210
 211 enum {
 212         ND_MIN_NAMESPACE_SIZE = PAGE_SIZE,
 213 };
 214
 215 enum ars_masks {
 216         ARS_STATUS_MASK = 0x0000FFFF,
 217         ARS_EXT_STATUS_SHIFT = 16,
 218 };
 219
 220 /*
 221  * struct nd_cmd_pkg
 222  *
 223  * is a wrapper to a quasi pass thru interface for invoking firmware
 224  * associated with nvdimms.
 225  *
 226  * INPUT PARAMETERS
 227  *
 228  * nd_family corresponds to the firmware (e.g. DSM) interface.
 229  *
 230  * nd_command are the function index advertised by the firmware.
 231  *
 232  * nd_size_in is the size of the input parameters being passed to firmware
 233  *
 234  * OUTPUT PARAMETERS
 235  *
 236  * nd_fw_size is the size of the data firmware wants to return for
 237  * the call.  If nd_fw_size is greater than size of nd_size_out, only
 238  * the first nd_size_out bytes are returned.
 239  */
 240
 241 struct nd_cmd_pkg {
 242         __u64   nd_family;              /* family of commands */
 243         __u64   nd_command;
 244         __u32   nd_size_in;             /* INPUT: size of input args */
 245         __u32   nd_size_out;            /* INPUT: size of payload */
 246         __u32   nd_reserved2[9];        /* reserved must be zero */
 247         __u32   nd_fw_size;             /* OUTPUT: size fw wants to return */
 248         unsigned char nd_payload[];     /* Contents of call      */
 249 };
 250
 251 /* These NVDIMM families represent pre-standardization command sets */
 252 #define NVDIMM_FAMILY_INTEL 0
 253 #define NVDIMM_FAMILY_HPE1 1
 254 #define NVDIMM_FAMILY_HPE2 2
 255 #define NVDIMM_FAMILY_MSFT 3
 256
 257 #define ND_IOCTL_CALL                   _IOWR(ND_IOCTL, ND_CMD_CALL,\
 258                                         struct nd_cmd_pkg)
 259
 260 #endif /* __NDCTL_H__ */