xref: /openbmc/linux/include/uapi/linux/ndctl.h (revision 94dfc73e)
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[];
34 } __packed;
35 
36 struct nd_cmd_set_config_hdr {
37 	__u32 in_offset;
38 	__u32 in_length;
39 	__u8 in_buf[];
40 } __packed;
41 
42 struct nd_cmd_vendor_hdr {
43 	__u32 opcode;
44 	__u32 in_length;
45 	__u8 in_buf[];
46 } __packed;
47 
48 struct nd_cmd_vendor_tail {
49 	__u32 status;
50 	__u32 out_length;
51 	__u8 out_buf[];
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[];
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 	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 
nvdimm_cmd_name(unsigned cmd)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_DAX_PMEM 7        /* Device DAX interface to pmem */
193 
194 enum nd_driver_flags {
195 	ND_DRIVER_DIMM            = 1 << ND_DEVICE_DIMM,
196 	ND_DRIVER_REGION_PMEM     = 1 << ND_DEVICE_REGION_PMEM,
197 	ND_DRIVER_REGION_BLK      = 1 << ND_DEVICE_REGION_BLK,
198 	ND_DRIVER_NAMESPACE_IO    = 1 << ND_DEVICE_NAMESPACE_IO,
199 	ND_DRIVER_NAMESPACE_PMEM  = 1 << ND_DEVICE_NAMESPACE_PMEM,
200 	ND_DRIVER_DAX_PMEM	  = 1 << ND_DEVICE_DAX_PMEM,
201 };
202 
203 enum ars_masks {
204 	ARS_STATUS_MASK = 0x0000FFFF,
205 	ARS_EXT_STATUS_SHIFT = 16,
206 };
207 
208 /*
209  * struct nd_cmd_pkg
210  *
211  * is a wrapper to a quasi pass thru interface for invoking firmware
212  * associated with nvdimms.
213  *
214  * INPUT PARAMETERS
215  *
216  * nd_family corresponds to the firmware (e.g. DSM) interface.
217  *
218  * nd_command are the function index advertised by the firmware.
219  *
220  * nd_size_in is the size of the input parameters being passed to firmware
221  *
222  * OUTPUT PARAMETERS
223  *
224  * nd_fw_size is the size of the data firmware wants to return for
225  * the call.  If nd_fw_size is greater than size of nd_size_out, only
226  * the first nd_size_out bytes are returned.
227  */
228 
229 struct nd_cmd_pkg {
230 	__u64   nd_family;		/* family of commands */
231 	__u64   nd_command;
232 	__u32   nd_size_in;		/* INPUT: size of input args */
233 	__u32   nd_size_out;		/* INPUT: size of payload */
234 	__u32   nd_reserved2[9];	/* reserved must be zero */
235 	__u32   nd_fw_size;		/* OUTPUT: size fw wants to return */
236 	unsigned char nd_payload[];	/* Contents of call      */
237 };
238 
239 /* These NVDIMM families represent pre-standardization command sets */
240 #define NVDIMM_FAMILY_INTEL 0
241 #define NVDIMM_FAMILY_HPE1 1
242 #define NVDIMM_FAMILY_HPE2 2
243 #define NVDIMM_FAMILY_MSFT 3
244 #define NVDIMM_FAMILY_HYPERV 4
245 #define NVDIMM_FAMILY_PAPR 5
246 #define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_PAPR
247 
248 #define NVDIMM_BUS_FAMILY_NFIT 0
249 #define NVDIMM_BUS_FAMILY_INTEL 1
250 #define NVDIMM_BUS_FAMILY_MAX NVDIMM_BUS_FAMILY_INTEL
251 
252 #define ND_IOCTL_CALL			_IOWR(ND_IOCTL, ND_CMD_CALL,\
253 					struct nd_cmd_pkg)
254 
255 #endif /* __NDCTL_H__ */
256