aboutsummaryrefslogtreecommitdiffstats
path: root/include/uapi/scsi/cxlflash_ioctl.h
blob: ad79c34f4d119080757a4abf2c286fba809c9c8c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
/*
 * CXL Flash Device Driver
 *
 * Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation
 *             Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
 *
 * Copyright (C) 2015 IBM Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef _CXLFLASH_IOCTL_H
#define _CXLFLASH_IOCTL_H

#include <linux/types.h>

/*
 * Structure and flag definitions CXL Flash superpipe ioctls
 */

#define DK_CXLFLASH_VERSION_0	0

struct dk_cxlflash_hdr {
	__u16 version;			/* Version data */
	__u16 rsvd[3];			/* Reserved for future use */
	__u64 flags;			/* Input flags */
	__u64 return_flags;		/* Returned flags */
};

/*
 * Return flag definitions available to all superpipe ioctls
 *
 * Similar to the input flags, these are grown from the bottom-up with the
 * intention that ioctl-specific return flag definitions would grow from the
 * top-down, allowing the two sets to co-exist. While not required/enforced
 * at this time, this provides future flexibility.
 */
#define DK_CXLFLASH_ALL_PORTS_ACTIVE	0x0000000000000001ULL
#define DK_CXLFLASH_APP_CLOSE_ADAP_FD	0x0000000000000002ULL
#define DK_CXLFLASH_CONTEXT_SQ_CMD_MODE	0x0000000000000004ULL

/*
 * General Notes:
 * -------------
 * The 'context_id' field of all ioctl structures contains the context
 * identifier for a context in the lower 32-bits (upper 32-bits are not
 * to be used when identifying a context to the AFU). That said, the value
 * in its entirety (all 64-bits) is to be treated as an opaque cookie and
 * should be presented as such when issuing ioctls.
 */

/*
 * DK_CXLFLASH_ATTACH Notes:
 * ------------------------
 * Read/write access permissions are specified via the O_RDONLY, O_WRONLY,
 * and O_RDWR flags defined in the fcntl.h header file.
 *
 * A valid adapter file descriptor (fd >= 0) is only returned on the initial
 * attach (successful) of a context. When a context is shared(reused), the user
 * is expected to already 'know' the adapter file descriptor associated with the
 * context.
 */
#define DK_CXLFLASH_ATTACH_REUSE_CONTEXT	0x8000000000000000ULL

struct dk_cxlflash_attach {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 num_interrupts;		/* Requested number of interrupts */
	__u64 context_id;		/* Returned context */
	__u64 mmio_size;		/* Returned size of MMIO area */
	__u64 block_size;		/* Returned block size, in bytes */
	__u64 adap_fd;			/* Returned adapter file descriptor */
	__u64 last_lba;			/* Returned last LBA on the device */
	__u64 max_xfer;			/* Returned max transfer size, blocks */
	__u64 reserved[8];		/* Reserved for future use */
};

struct dk_cxlflash_detach {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id;		/* Context to detach */
	__u64 reserved[8];		/* Reserved for future use */
};

struct dk_cxlflash_udirect {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id;		/* Context to own physical resources */
	__u64 rsrc_handle;		/* Returned resource handle */
	__u64 last_lba;			/* Returned last LBA on the device */
	__u64 reserved[8];		/* Reserved for future use */
};

#define DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME	0x8000000000000000ULL

struct dk_cxlflash_uvirtual {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id;		/* Context to own virtual resources */
	__u64 lun_size;			/* Requested size, in 4K blocks */
	__u64 rsrc_handle;		/* Returned resource handle */
	__u64 last_lba;			/* Returned last LBA of LUN */
	__u64 reserved[8];		/* Reserved for future use */
};

struct dk_cxlflash_release {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id;		/* Context owning resources */
	__u64 rsrc_handle;		/* Resource handle to release */
	__u64 reserved[8];		/* Reserved for future use */
};

struct dk_cxlflash_resize {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id;		/* Context owning resources */
	__u64 rsrc_handle;		/* Resource handle of LUN to resize */
	__u64 req_size;			/* New requested size, in 4K blocks */
	__u64 last_lba;			/* Returned last LBA of LUN */
	__u64 reserved[8];		/* Reserved for future use */
};

struct dk_cxlflash_clone {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id_src;		/* Context to clone from */
	__u64 context_id_dst;		/* Context to clone to */
	__u64 adap_fd_src;		/* Source context adapter fd */
	__u64 reserved[8];		/* Reserved for future use */
};

#define DK_CXLFLASH_VERIFY_SENSE_LEN	18
#define DK_CXLFLASH_VERIFY_HINT_SENSE	0x8000000000000000ULL

struct dk_cxlflash_verify {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 context_id;		/* Context owning resources to verify */
	__u64 rsrc_handle;		/* Resource handle of LUN */
	__u64 hint;			/* Reasons for verify */
	__u64 last_lba;			/* Returned last LBA of device */
	__u8 sense_data[DK_CXLFLASH_VERIFY_SENSE_LEN]; /* SCSI sense data */
	__u8 pad[6];			/* Pad to next 8-byte boundary */
	__u64 reserved[8];		/* Reserved for future use */
};

#define DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET	0x8000000000000000ULL

struct dk_cxlflash_recover_afu {
	struct dk_cxlflash_hdr hdr;	/* Common fields */
	__u64 reason;			/* Reason for recovery request */
	__u64 context_id;		/* Context to recover / updated ID */
	__u64 mmio_size;		/* Returned size of MMIO area */
	__u64 adap_fd;			/* Returned adapter file descriptor */
	__u64 reserved[8];		/* Reserved for future use */
};

#define DK_CXLFLASH_MANAGE_LUN_WWID_LEN			16
#define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE		0x8000000000000000ULL
#define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE	0x4000000000000000ULL
#define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE	0x2000000000000000ULL

struct dk_cxlflash_manage_lun {
	struct dk_cxlflash_hdr hdr;			/* Common fields */
	__u8 wwid[DK_CXLFLASH_MANAGE_LUN_WWID_LEN];	/* Page83 WWID, NAA-6 */
	__u64 reserved[8];				/* Rsvd, future use */
};

union cxlflash_ioctls {
	struct dk_cxlflash_attach attach;
	struct dk_cxlflash_detach detach;
	struct dk_cxlflash_udirect udirect;
	struct dk_cxlflash_uvirtual uvirtual;
	struct dk_cxlflash_release release;
	struct dk_cxlflash_resize resize;
	struct dk_cxlflash_clone clone;
	struct dk_cxlflash_verify verify;
	struct dk_cxlflash_recover_afu recover_afu;
	struct dk_cxlflash_manage_lun manage_lun;
};

#define MAX_CXLFLASH_IOCTL_SZ	(sizeof(union cxlflash_ioctls))

#define CXL_MAGIC 0xCA
#define CXL_IOWR(_n, _s)	_IOWR(CXL_MAGIC, _n, struct _s)

/*
 * CXL Flash superpipe ioctls start at base of the reserved CXL_MAGIC
 * region (0x80) and grow upwards.
 */
#define DK_CXLFLASH_ATTACH		CXL_IOWR(0x80, dk_cxlflash_attach)
#define DK_CXLFLASH_USER_DIRECT		CXL_IOWR(0x81, dk_cxlflash_udirect)
#define DK_CXLFLASH_RELEASE		CXL_IOWR(0x82, dk_cxlflash_release)
#define DK_CXLFLASH_DETACH		CXL_IOWR(0x83, dk_cxlflash_detach)
#define DK_CXLFLASH_VERIFY		CXL_IOWR(0x84, dk_cxlflash_verify)
#define DK_CXLFLASH_RECOVER_AFU		CXL_IOWR(0x85, dk_cxlflash_recover_afu)
#define DK_CXLFLASH_MANAGE_LUN		CXL_IOWR(0x86, dk_cxlflash_manage_lun)
#define DK_CXLFLASH_USER_VIRTUAL	CXL_IOWR(0x87, dk_cxlflash_uvirtual)
#define DK_CXLFLASH_VLUN_RESIZE		CXL_IOWR(0x88, dk_cxlflash_resize)
#define DK_CXLFLASH_VLUN_CLONE		CXL_IOWR(0x89, dk_cxlflash_clone)

/*
 * Structure and flag definitions CXL Flash host ioctls
 */

#define HT_CXLFLASH_VERSION_0  0

struct ht_cxlflash_hdr {
	__u16 version;		/* Version data */
	__u16 subcmd;		/* Sub-command */
	__u16 rsvd[2];		/* Reserved for future use */
	__u64 flags;		/* Input flags */
	__u64 return_flags;	/* Returned flags */
};

#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_CREATE_LUN	0x0001
#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_DELETE_LUN	0x0002
#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_QUERY_PORT	0x0003
#define HT_CXLFLASH_LUN_PROVISION_WWID_LEN		16

struct ht_cxlflash_lun_provision {
	struct ht_cxlflash_hdr hdr; /* Common fields */
	__u16 port;		    /* Target port for provision request */
	__u16 reserved16[3];	    /* Reserved for future use */
	__u64 size;		    /* Size of LUN (4K blocks) */
	__u64 lun_id;		    /* SCSI LUN ID */
	__u8 wwid[HT_CXLFLASH_LUN_PROVISION_WWID_LEN]; /* Page83 WWID, NAA-6 */
	__u64 max_num_luns;	    /* Maximum number of LUNs provisioned */
	__u64 cur_num_luns;	    /* Current number of LUNs provisioned */
	__u64 max_cap_port;	    /* Total capacity for port (4K blocks) */
	__u64 cur_cap_port;	    /* Current capacity for port (4K blocks) */
	__u64 reserved[8];	    /* Reserved for future use */
};

union cxlflash_ht_ioctls {
	struct ht_cxlflash_lun_provision lun_provision;
};

#define MAX_HT_CXLFLASH_IOCTL_SZ	(sizeof(union cxlflash_ht_ioctls))

/*
 * CXL Flash host ioctls start at the top of the reserved CXL_MAGIC
 * region (0xBF) and grow downwards.
 */
#define HT_CXLFLASH_LUN_PROVISION CXL_IOWR(0xBF, ht_cxlflash_lun_provision)


#endif /* ifndef _CXLFLASH_IOCTL_H */

Privacy Policy