Merge tag 'mmc-v5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
[sfrench/cifs-2.6.git] / 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         switch (cmd) {
132         case ND_CMD_ARS_CAP:            return "ars_cap";
133         case ND_CMD_ARS_START:          return "ars_start";
134         case ND_CMD_ARS_STATUS:         return "ars_status";
135         case ND_CMD_CLEAR_ERROR:        return "clear_error";
136         case ND_CMD_CALL:               return "cmd_call";
137         default:                        return "unknown";
138         }
139 }
140
141 static inline const char *nvdimm_cmd_name(unsigned cmd)
142 {
143         switch (cmd) {
144         case ND_CMD_SMART:                      return "smart";
145         case ND_CMD_SMART_THRESHOLD:            return "smart_thresh";
146         case ND_CMD_DIMM_FLAGS:                 return "flags";
147         case ND_CMD_GET_CONFIG_SIZE:            return "get_size";
148         case ND_CMD_GET_CONFIG_DATA:            return "get_data";
149         case ND_CMD_SET_CONFIG_DATA:            return "set_data";
150         case ND_CMD_VENDOR_EFFECT_LOG_SIZE:     return "effect_size";
151         case ND_CMD_VENDOR_EFFECT_LOG:          return "effect_log";
152         case ND_CMD_VENDOR:                     return "vendor";
153         case ND_CMD_CALL:                       return "cmd_call";
154         default:                                return "unknown";
155         }
156 }
157
158 #define ND_IOCTL 'N'
159
160 #define ND_IOCTL_DIMM_FLAGS             _IOWR(ND_IOCTL, ND_CMD_DIMM_FLAGS,\
161                                         struct nd_cmd_dimm_flags)
162
163 #define ND_IOCTL_GET_CONFIG_SIZE        _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_SIZE,\
164                                         struct nd_cmd_get_config_size)
165
166 #define ND_IOCTL_GET_CONFIG_DATA        _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_DATA,\
167                                         struct nd_cmd_get_config_data_hdr)
168
169 #define ND_IOCTL_SET_CONFIG_DATA        _IOWR(ND_IOCTL, ND_CMD_SET_CONFIG_DATA,\
170                                         struct nd_cmd_set_config_hdr)
171
172 #define ND_IOCTL_VENDOR                 _IOWR(ND_IOCTL, ND_CMD_VENDOR,\
173                                         struct nd_cmd_vendor_hdr)
174
175 #define ND_IOCTL_ARS_CAP                _IOWR(ND_IOCTL, ND_CMD_ARS_CAP,\
176                                         struct nd_cmd_ars_cap)
177
178 #define ND_IOCTL_ARS_START              _IOWR(ND_IOCTL, ND_CMD_ARS_START,\
179                                         struct nd_cmd_ars_start)
180
181 #define ND_IOCTL_ARS_STATUS             _IOWR(ND_IOCTL, ND_CMD_ARS_STATUS,\
182                                         struct nd_cmd_ars_status)
183
184 #define ND_IOCTL_CLEAR_ERROR            _IOWR(ND_IOCTL, ND_CMD_CLEAR_ERROR,\
185                                         struct nd_cmd_clear_error)
186
187 #define ND_DEVICE_DIMM 1            /* nd_dimm: container for "config data" */
188 #define ND_DEVICE_REGION_PMEM 2     /* nd_region: (parent of PMEM namespaces) */
189 #define ND_DEVICE_REGION_BLK 3      /* nd_region: (parent of BLK namespaces) */
190 #define ND_DEVICE_NAMESPACE_IO 4    /* legacy persistent memory */
191 #define ND_DEVICE_NAMESPACE_PMEM 5  /* PMEM namespace (may alias with BLK) */
192 #define ND_DEVICE_NAMESPACE_BLK 6   /* BLK namespace (may alias with PMEM) */
193 #define ND_DEVICE_DAX_PMEM 7        /* Device DAX interface to pmem */
194
195 enum nd_driver_flags {
196         ND_DRIVER_DIMM            = 1 << ND_DEVICE_DIMM,
197         ND_DRIVER_REGION_PMEM     = 1 << ND_DEVICE_REGION_PMEM,
198         ND_DRIVER_REGION_BLK      = 1 << ND_DEVICE_REGION_BLK,
199         ND_DRIVER_NAMESPACE_IO    = 1 << ND_DEVICE_NAMESPACE_IO,
200         ND_DRIVER_NAMESPACE_PMEM  = 1 << ND_DEVICE_NAMESPACE_PMEM,
201         ND_DRIVER_NAMESPACE_BLK   = 1 << ND_DEVICE_NAMESPACE_BLK,
202         ND_DRIVER_DAX_PMEM        = 1 << ND_DEVICE_DAX_PMEM,
203 };
204
205 enum ars_masks {
206         ARS_STATUS_MASK = 0x0000FFFF,
207         ARS_EXT_STATUS_SHIFT = 16,
208 };
209
210 /*
211  * struct nd_cmd_pkg
212  *
213  * is a wrapper to a quasi pass thru interface for invoking firmware
214  * associated with nvdimms.
215  *
216  * INPUT PARAMETERS
217  *
218  * nd_family corresponds to the firmware (e.g. DSM) interface.
219  *
220  * nd_command are the function index advertised by the firmware.
221  *
222  * nd_size_in is the size of the input parameters being passed to firmware
223  *
224  * OUTPUT PARAMETERS
225  *
226  * nd_fw_size is the size of the data firmware wants to return for
227  * the call.  If nd_fw_size is greater than size of nd_size_out, only
228  * the first nd_size_out bytes are returned.
229  */
230
231 struct nd_cmd_pkg {
232         __u64   nd_family;              /* family of commands */
233         __u64   nd_command;
234         __u32   nd_size_in;             /* INPUT: size of input args */
235         __u32   nd_size_out;            /* INPUT: size of payload */
236         __u32   nd_reserved2[9];        /* reserved must be zero */
237         __u32   nd_fw_size;             /* OUTPUT: size fw wants to return */
238         unsigned char nd_payload[];     /* Contents of call      */
239 };
240
241 /* These NVDIMM families represent pre-standardization command sets */
242 #define NVDIMM_FAMILY_INTEL 0
243 #define NVDIMM_FAMILY_HPE1 1
244 #define NVDIMM_FAMILY_HPE2 2
245 #define NVDIMM_FAMILY_MSFT 3
246
247 #define ND_IOCTL_CALL                   _IOWR(ND_IOCTL, ND_CMD_CALL,\
248                                         struct nd_cmd_pkg)
249
250 #endif /* __NDCTL_H__ */