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
nvdimm_bus_cmd_name(unsigned cmd)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
nvdimm_cmd_name(unsigned cmd)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__ */
261
