1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2/* 3 * CXL Flash Device Driver 4 * 5 * Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation 6 * Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation 7 * 8 * Copyright (C) 2015 IBM Corporation 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 */ 15 16#ifndef _CXLFLASH_IOCTL_H 17#define _CXLFLASH_IOCTL_H 18 19#include <linux/types.h> 20 21/* 22 * Structure and definitions for all CXL Flash ioctls 23 */ 24#define CXLFLASH_WWID_LEN 16 25 26/* 27 * Structure and flag definitions CXL Flash superpipe ioctls 28 */ 29 30#define DK_CXLFLASH_VERSION_0 0 31 32struct dk_cxlflash_hdr { 33 __u16 version; /* Version data */ 34 __u16 rsvd[3]; /* Reserved for future use */ 35 __u64 flags; /* Input flags */ 36 __u64 return_flags; /* Returned flags */ 37}; 38 39/* 40 * Return flag definitions available to all superpipe ioctls 41 * 42 * Similar to the input flags, these are grown from the bottom-up with the 43 * intention that ioctl-specific return flag definitions would grow from the 44 * top-down, allowing the two sets to co-exist. While not required/enforced 45 * at this time, this provides future flexibility. 46 */ 47#define DK_CXLFLASH_ALL_PORTS_ACTIVE 0x0000000000000001ULL 48#define DK_CXLFLASH_APP_CLOSE_ADAP_FD 0x0000000000000002ULL 49#define DK_CXLFLASH_CONTEXT_SQ_CMD_MODE 0x0000000000000004ULL 50 51/* 52 * General Notes: 53 * ------------- 54 * The 'context_id' field of all ioctl structures contains the context 55 * identifier for a context in the lower 32-bits (upper 32-bits are not 56 * to be used when identifying a context to the AFU). That said, the value 57 * in its entirety (all 64-bits) is to be treated as an opaque cookie and 58 * should be presented as such when issuing ioctls. 59 */ 60 61/* 62 * DK_CXLFLASH_ATTACH Notes: 63 * ------------------------ 64 * Read/write access permissions are specified via the O_RDONLY, O_WRONLY, 65 * and O_RDWR flags defined in the fcntl.h header file. 66 * 67 * A valid adapter file descriptor (fd >= 0) is only returned on the initial 68 * attach (successful) of a context. When a context is shared(reused), the user 69 * is expected to already 'know' the adapter file descriptor associated with the 70 * context. 71 */ 72#define DK_CXLFLASH_ATTACH_REUSE_CONTEXT 0x8000000000000000ULL 73 74struct dk_cxlflash_attach { 75 struct dk_cxlflash_hdr hdr; /* Common fields */ 76 __u64 num_interrupts; /* Requested number of interrupts */ 77 __u64 context_id; /* Returned context */ 78 __u64 mmio_size; /* Returned size of MMIO area */ 79 __u64 block_size; /* Returned block size, in bytes */ 80 __u64 adap_fd; /* Returned adapter file descriptor */ 81 __u64 last_lba; /* Returned last LBA on the device */ 82 __u64 max_xfer; /* Returned max transfer size, blocks */ 83 __u64 reserved[8]; /* Reserved for future use */ 84}; 85 86struct dk_cxlflash_detach { 87 struct dk_cxlflash_hdr hdr; /* Common fields */ 88 __u64 context_id; /* Context to detach */ 89 __u64 reserved[8]; /* Reserved for future use */ 90}; 91 92struct dk_cxlflash_udirect { 93 struct dk_cxlflash_hdr hdr; /* Common fields */ 94 __u64 context_id; /* Context to own physical resources */ 95 __u64 rsrc_handle; /* Returned resource handle */ 96 __u64 last_lba; /* Returned last LBA on the device */ 97 __u64 reserved[8]; /* Reserved for future use */ 98}; 99 100#define DK_CXLFLASH_UVIRTUAL_NEED_WRITE_SAME 0x8000000000000000ULL 101 102struct dk_cxlflash_uvirtual { 103 struct dk_cxlflash_hdr hdr; /* Common fields */ 104 __u64 context_id; /* Context to own virtual resources */ 105 __u64 lun_size; /* Requested size, in 4K blocks */ 106 __u64 rsrc_handle; /* Returned resource handle */ 107 __u64 last_lba; /* Returned last LBA of LUN */ 108 __u64 reserved[8]; /* Reserved for future use */ 109}; 110 111struct dk_cxlflash_release { 112 struct dk_cxlflash_hdr hdr; /* Common fields */ 113 __u64 context_id; /* Context owning resources */ 114 __u64 rsrc_handle; /* Resource handle to release */ 115 __u64 reserved[8]; /* Reserved for future use */ 116}; 117 118struct dk_cxlflash_resize { 119 struct dk_cxlflash_hdr hdr; /* Common fields */ 120 __u64 context_id; /* Context owning resources */ 121 __u64 rsrc_handle; /* Resource handle of LUN to resize */ 122 __u64 req_size; /* New requested size, in 4K blocks */ 123 __u64 last_lba; /* Returned last LBA of LUN */ 124 __u64 reserved[8]; /* Reserved for future use */ 125}; 126 127struct dk_cxlflash_clone { 128 struct dk_cxlflash_hdr hdr; /* Common fields */ 129 __u64 context_id_src; /* Context to clone from */ 130 __u64 context_id_dst; /* Context to clone to */ 131 __u64 adap_fd_src; /* Source context adapter fd */ 132 __u64 reserved[8]; /* Reserved for future use */ 133}; 134 135#define DK_CXLFLASH_VERIFY_SENSE_LEN 18 136#define DK_CXLFLASH_VERIFY_HINT_SENSE 0x8000000000000000ULL 137 138struct dk_cxlflash_verify { 139 struct dk_cxlflash_hdr hdr; /* Common fields */ 140 __u64 context_id; /* Context owning resources to verify */ 141 __u64 rsrc_handle; /* Resource handle of LUN */ 142 __u64 hint; /* Reasons for verify */ 143 __u64 last_lba; /* Returned last LBA of device */ 144 __u8 sense_data[DK_CXLFLASH_VERIFY_SENSE_LEN]; /* SCSI sense data */ 145 __u8 pad[6]; /* Pad to next 8-byte boundary */ 146 __u64 reserved[8]; /* Reserved for future use */ 147}; 148 149#define DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET 0x8000000000000000ULL 150 151struct dk_cxlflash_recover_afu { 152 struct dk_cxlflash_hdr hdr; /* Common fields */ 153 __u64 reason; /* Reason for recovery request */ 154 __u64 context_id; /* Context to recover / updated ID */ 155 __u64 mmio_size; /* Returned size of MMIO area */ 156 __u64 adap_fd; /* Returned adapter file descriptor */ 157 __u64 reserved[8]; /* Reserved for future use */ 158}; 159 160#define DK_CXLFLASH_MANAGE_LUN_WWID_LEN CXLFLASH_WWID_LEN 161#define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE 0x8000000000000000ULL 162#define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE 0x4000000000000000ULL 163#define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE 0x2000000000000000ULL 164 165struct dk_cxlflash_manage_lun { 166 struct dk_cxlflash_hdr hdr; /* Common fields */ 167 __u8 wwid[DK_CXLFLASH_MANAGE_LUN_WWID_LEN]; /* Page83 WWID, NAA-6 */ 168 __u64 reserved[8]; /* Rsvd, future use */ 169}; 170 171union cxlflash_ioctls { 172 struct dk_cxlflash_attach attach; 173 struct dk_cxlflash_detach detach; 174 struct dk_cxlflash_udirect udirect; 175 struct dk_cxlflash_uvirtual uvirtual; 176 struct dk_cxlflash_release release; 177 struct dk_cxlflash_resize resize; 178 struct dk_cxlflash_clone clone; 179 struct dk_cxlflash_verify verify; 180 struct dk_cxlflash_recover_afu recover_afu; 181 struct dk_cxlflash_manage_lun manage_lun; 182}; 183 184#define MAX_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ioctls)) 185 186#define CXL_MAGIC 0xCA 187#define CXL_IOWR(_n, _s) _IOWR(CXL_MAGIC, _n, struct _s) 188 189/* 190 * CXL Flash superpipe ioctls start at base of the reserved CXL_MAGIC 191 * region (0x80) and grow upwards. 192 */ 193#define DK_CXLFLASH_ATTACH CXL_IOWR(0x80, dk_cxlflash_attach) 194#define DK_CXLFLASH_USER_DIRECT CXL_IOWR(0x81, dk_cxlflash_udirect) 195#define DK_CXLFLASH_RELEASE CXL_IOWR(0x82, dk_cxlflash_release) 196#define DK_CXLFLASH_DETACH CXL_IOWR(0x83, dk_cxlflash_detach) 197#define DK_CXLFLASH_VERIFY CXL_IOWR(0x84, dk_cxlflash_verify) 198#define DK_CXLFLASH_RECOVER_AFU CXL_IOWR(0x85, dk_cxlflash_recover_afu) 199#define DK_CXLFLASH_MANAGE_LUN CXL_IOWR(0x86, dk_cxlflash_manage_lun) 200#define DK_CXLFLASH_USER_VIRTUAL CXL_IOWR(0x87, dk_cxlflash_uvirtual) 201#define DK_CXLFLASH_VLUN_RESIZE CXL_IOWR(0x88, dk_cxlflash_resize) 202#define DK_CXLFLASH_VLUN_CLONE CXL_IOWR(0x89, dk_cxlflash_clone) 203 204/* 205 * Structure and flag definitions CXL Flash host ioctls 206 */ 207 208#define HT_CXLFLASH_VERSION_0 0 209 210struct ht_cxlflash_hdr { 211 __u16 version; /* Version data */ 212 __u16 subcmd; /* Sub-command */ 213 __u16 rsvd[2]; /* Reserved for future use */ 214 __u64 flags; /* Input flags */ 215 __u64 return_flags; /* Returned flags */ 216}; 217 218/* 219 * Input flag definitions available to all host ioctls 220 * 221 * These are grown from the bottom-up with the intention that ioctl-specific 222 * input flag definitions would grow from the top-down, allowing the two sets 223 * to co-exist. While not required/enforced at this time, this provides future 224 * flexibility. 225 */ 226#define HT_CXLFLASH_HOST_READ 0x0000000000000000ULL 227#define HT_CXLFLASH_HOST_WRITE 0x0000000000000001ULL 228 229#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_CREATE_LUN 0x0001 230#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_DELETE_LUN 0x0002 231#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_QUERY_PORT 0x0003 232 233struct ht_cxlflash_lun_provision { 234 struct ht_cxlflash_hdr hdr; /* Common fields */ 235 __u16 port; /* Target port for provision request */ 236 __u16 reserved16[3]; /* Reserved for future use */ 237 __u64 size; /* Size of LUN (4K blocks) */ 238 __u64 lun_id; /* SCSI LUN ID */ 239 __u8 wwid[CXLFLASH_WWID_LEN];/* Page83 WWID, NAA-6 */ 240 __u64 max_num_luns; /* Maximum number of LUNs provisioned */ 241 __u64 cur_num_luns; /* Current number of LUNs provisioned */ 242 __u64 max_cap_port; /* Total capacity for port (4K blocks) */ 243 __u64 cur_cap_port; /* Current capacity for port (4K blocks) */ 244 __u64 reserved[8]; /* Reserved for future use */ 245}; 246 247#define HT_CXLFLASH_AFU_DEBUG_MAX_DATA_LEN 262144 /* 256K */ 248#define HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN 12 249struct ht_cxlflash_afu_debug { 250 struct ht_cxlflash_hdr hdr; /* Common fields */ 251 __u8 reserved8[4]; /* Reserved for future use */ 252 __u8 afu_subcmd[HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN]; /* AFU subcommand, 253 * (pass through) 254 */ 255 __u64 data_ea; /* Data buffer effective address */ 256 __u32 data_len; /* Data buffer length */ 257 __u32 reserved32; /* Reserved for future use */ 258 __u64 reserved[8]; /* Reserved for future use */ 259}; 260 261union cxlflash_ht_ioctls { 262 struct ht_cxlflash_lun_provision lun_provision; 263 struct ht_cxlflash_afu_debug afu_debug; 264}; 265 266#define MAX_HT_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ht_ioctls)) 267 268/* 269 * CXL Flash host ioctls start at the top of the reserved CXL_MAGIC 270 * region (0xBF) and grow downwards. 271 */ 272#define HT_CXLFLASH_LUN_PROVISION CXL_IOWR(0xBF, ht_cxlflash_lun_provision) 273#define HT_CXLFLASH_AFU_DEBUG CXL_IOWR(0xBE, ht_cxlflash_afu_debug) 274 275 276#endif /* ifndef _CXLFLASH_IOCTL_H */ 277