1 /* 2 * CXL Flash Device Driver 3 * 4 * Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation 5 * Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) 2015 IBM Corporation 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15 #ifndef _SISLITE_H 16 #define _SISLITE_H 17 18 #include <linux/types.h> 19 20 typedef u16 ctx_hndl_t; 21 typedef u32 res_hndl_t; 22 23 #define SIZE_4K 4096 24 #define SIZE_64K 65536 25 26 /* 27 * IOARCB: 64 bytes, min 16 byte alignment required, host native endianness 28 * except for SCSI CDB which remains big endian per SCSI standards. 29 */ 30 struct sisl_ioarcb { 31 u16 ctx_id; /* ctx_hndl_t */ 32 u16 req_flags; 33 #define SISL_REQ_FLAGS_RES_HNDL 0x8000U /* bit 0 (MSB) */ 34 #define SISL_REQ_FLAGS_PORT_LUN_ID 0x0000U 35 36 #define SISL_REQ_FLAGS_SUP_UNDERRUN 0x4000U /* bit 1 */ 37 38 #define SISL_REQ_FLAGS_TIMEOUT_SECS 0x0000U /* bits 8,9 */ 39 #define SISL_REQ_FLAGS_TIMEOUT_MSECS 0x0040U 40 #define SISL_REQ_FLAGS_TIMEOUT_USECS 0x0080U 41 #define SISL_REQ_FLAGS_TIMEOUT_CYCLES 0x00C0U 42 43 #define SISL_REQ_FLAGS_TMF_CMD 0x0004u /* bit 13 */ 44 45 #define SISL_REQ_FLAGS_AFU_CMD 0x0002U /* bit 14 */ 46 47 #define SISL_REQ_FLAGS_HOST_WRITE 0x0001U /* bit 15 (LSB) */ 48 #define SISL_REQ_FLAGS_HOST_READ 0x0000U 49 50 union { 51 u32 res_hndl; /* res_hndl_t */ 52 u32 port_sel; /* this is a selection mask: 53 * 0x1 -> port#0 can be selected, 54 * 0x2 -> port#1 can be selected. 55 * Can be bitwise ORed. 56 */ 57 }; 58 u64 lun_id; 59 u32 data_len; /* 4K for read/write */ 60 u32 ioadl_len; 61 union { 62 u64 data_ea; /* min 16 byte aligned */ 63 u64 ioadl_ea; 64 }; 65 u8 msi; /* LISN to send on RRQ write */ 66 #define SISL_MSI_CXL_PFAULT 0 /* reserved for CXL page faults */ 67 #define SISL_MSI_SYNC_ERROR 1 /* recommended for AFU sync error */ 68 #define SISL_MSI_RRQ_UPDATED 2 /* recommended for IO completion */ 69 #define SISL_MSI_ASYNC_ERROR 3 /* master only - for AFU async error */ 70 71 u8 rrq; /* 0 for a single RRQ */ 72 u16 timeout; /* in units specified by req_flags */ 73 u32 rsvd1; 74 u8 cdb[16]; /* must be in big endian */ 75 union { 76 u64 reserved; /* Reserved for IOARRIN mode */ 77 struct sisl_ioasa *ioasa; /* IOASA EA for SQ Mode */ 78 }; 79 } __packed; 80 81 struct sisl_rc { 82 u8 flags; 83 #define SISL_RC_FLAGS_SENSE_VALID 0x80U 84 #define SISL_RC_FLAGS_FCP_RSP_CODE_VALID 0x40U 85 #define SISL_RC_FLAGS_OVERRUN 0x20U 86 #define SISL_RC_FLAGS_UNDERRUN 0x10U 87 88 u8 afu_rc; 89 #define SISL_AFU_RC_RHT_INVALID 0x01U /* user error */ 90 #define SISL_AFU_RC_RHT_UNALIGNED 0x02U /* should never happen */ 91 #define SISL_AFU_RC_RHT_OUT_OF_BOUNDS 0x03u /* user error */ 92 #define SISL_AFU_RC_RHT_DMA_ERR 0x04u /* see afu_extra 93 * may retry if afu_retry is off 94 * possible on master exit 95 */ 96 #define SISL_AFU_RC_RHT_RW_PERM 0x05u /* no RW perms, user error */ 97 #define SISL_AFU_RC_LXT_UNALIGNED 0x12U /* should never happen */ 98 #define SISL_AFU_RC_LXT_OUT_OF_BOUNDS 0x13u /* user error */ 99 #define SISL_AFU_RC_LXT_DMA_ERR 0x14u /* see afu_extra 100 * may retry if afu_retry is off 101 * possible on master exit 102 */ 103 #define SISL_AFU_RC_LXT_RW_PERM 0x15u /* no RW perms, user error */ 104 105 #define SISL_AFU_RC_NOT_XLATE_HOST 0x1au /* possible if master exited */ 106 107 /* NO_CHANNELS means the FC ports selected by dest_port in 108 * IOARCB or in the LXT entry are down when the AFU tried to select 109 * a FC port. If the port went down on an active IO, it will set 110 * fc_rc to =0x54(NOLOGI) or 0x57(LINKDOWN) instead. 111 */ 112 #define SISL_AFU_RC_NO_CHANNELS 0x20U /* see afu_extra, may retry */ 113 #define SISL_AFU_RC_CAP_VIOLATION 0x21U /* either user error or 114 * afu reset/master restart 115 */ 116 #define SISL_AFU_RC_OUT_OF_DATA_BUFS 0x30U /* always retry */ 117 #define SISL_AFU_RC_DATA_DMA_ERR 0x31U /* see afu_extra 118 * may retry if afu_retry is off 119 */ 120 121 u8 scsi_rc; /* SCSI status byte, retry as appropriate */ 122 #define SISL_SCSI_RC_CHECK 0x02U 123 #define SISL_SCSI_RC_BUSY 0x08u 124 125 u8 fc_rc; /* retry */ 126 /* 127 * We should only see fc_rc=0x57 (LINKDOWN) or 0x54(NOLOGI) for 128 * commands that are in flight when a link goes down or is logged out. 129 * If the link is down or logged out before AFU selects the port, either 130 * it will choose the other port or we will get afu_rc=0x20 (no_channel) 131 * if there is no valid port to use. 132 * 133 * ABORTPEND/ABORTOK/ABORTFAIL/TGTABORT can be retried, typically these 134 * would happen if a frame is dropped and something times out. 135 * NOLOGI or LINKDOWN can be retried if the other port is up. 136 * RESIDERR can be retried as well. 137 * 138 * ABORTFAIL might indicate that lots of frames are getting CRC errors. 139 * So it maybe retried once and reset the link if it happens again. 140 * The link can also be reset on the CRC error threshold interrupt. 141 */ 142 #define SISL_FC_RC_ABORTPEND 0x52 /* exchange timeout or abort request */ 143 #define SISL_FC_RC_WRABORTPEND 0x53 /* due to write XFER_RDY invalid */ 144 #define SISL_FC_RC_NOLOGI 0x54 /* port not logged in, in-flight cmds */ 145 #define SISL_FC_RC_NOEXP 0x55 /* FC protocol error or HW bug */ 146 #define SISL_FC_RC_INUSE 0x56 /* tag already in use, HW bug */ 147 #define SISL_FC_RC_LINKDOWN 0x57 /* link down, in-flight cmds */ 148 #define SISL_FC_RC_ABORTOK 0x58 /* pending abort completed w/success */ 149 #define SISL_FC_RC_ABORTFAIL 0x59 /* pending abort completed w/fail */ 150 #define SISL_FC_RC_RESID 0x5A /* ioasa underrun/overrun flags set */ 151 #define SISL_FC_RC_RESIDERR 0x5B /* actual data len does not match SCSI 152 * reported len, possibly due to dropped 153 * frames 154 */ 155 #define SISL_FC_RC_TGTABORT 0x5C /* command aborted by target */ 156 }; 157 158 #define SISL_SENSE_DATA_LEN 20 /* Sense data length */ 159 160 /* 161 * IOASA: 64 bytes & must follow IOARCB, min 16 byte alignment required, 162 * host native endianness 163 */ 164 struct sisl_ioasa { 165 union { 166 struct sisl_rc rc; 167 u32 ioasc; 168 #define SISL_IOASC_GOOD_COMPLETION 0x00000000U 169 }; 170 u32 resid; 171 u8 port; 172 u8 afu_extra; 173 /* when afu_rc=0x04, 0x14, 0x31 (_xxx_DMA_ERR): 174 * afu_exta contains PSL response code. Useful codes are: 175 */ 176 #define SISL_AFU_DMA_ERR_PAGE_IN 0x0A /* AFU_retry_on_pagein Action 177 * Enabled N/A 178 * Disabled retry 179 */ 180 #define SISL_AFU_DMA_ERR_INVALID_EA 0x0B /* this is a hard error 181 * afu_rc Implies 182 * 0x04, 0x14 master exit. 183 * 0x31 user error. 184 */ 185 /* when afu rc=0x20 (no channels): 186 * afu_extra bits [4:5]: available portmask, [6:7]: requested portmask. 187 */ 188 #define SISL_AFU_NO_CLANNELS_AMASK(afu_extra) (((afu_extra) & 0x0C) >> 2) 189 #define SISL_AFU_NO_CLANNELS_RMASK(afu_extra) ((afu_extra) & 0x03) 190 191 u8 scsi_extra; 192 u8 fc_extra; 193 u8 sense_data[SISL_SENSE_DATA_LEN]; 194 195 /* These fields are defined by the SISlite architecture for the 196 * host to use as they see fit for their implementation. 197 */ 198 union { 199 u64 host_use[4]; 200 u8 host_use_b[32]; 201 }; 202 } __packed; 203 204 #define SISL_RESP_HANDLE_T_BIT 0x1ULL /* Toggle bit */ 205 206 /* MMIO space is required to support only 64-bit access */ 207 208 /* 209 * This AFU has two mechanisms to deal with endian-ness. 210 * One is a global configuration (in the afu_config) register 211 * below that specifies the endian-ness of the host. 212 * The other is a per context (i.e. application) specification 213 * controlled by the endian_ctrl field here. Since the master 214 * context is one such application the master context's 215 * endian-ness is set to be the same as the host. 216 * 217 * As per the SISlite spec, the MMIO registers are always 218 * big endian. 219 */ 220 #define SISL_ENDIAN_CTRL_BE 0x8000000000000080ULL 221 #define SISL_ENDIAN_CTRL_LE 0x0000000000000000ULL 222 223 #ifdef __BIG_ENDIAN 224 #define SISL_ENDIAN_CTRL SISL_ENDIAN_CTRL_BE 225 #else 226 #define SISL_ENDIAN_CTRL SISL_ENDIAN_CTRL_LE 227 #endif 228 229 /* per context host transport MMIO */ 230 struct sisl_host_map { 231 __be64 endian_ctrl; /* Per context Endian Control. The AFU will 232 * operate on whatever the context is of the 233 * host application. 234 */ 235 236 __be64 intr_status; /* this sends LISN# programmed in ctx_ctrl. 237 * Only recovery in a PERM_ERR is a context 238 * exit since there is no way to tell which 239 * command caused the error. 240 */ 241 #define SISL_ISTATUS_PERM_ERR_CMDROOM 0x0010ULL /* b59, user error */ 242 #define SISL_ISTATUS_PERM_ERR_RCB_READ 0x0008ULL /* b60, user error */ 243 #define SISL_ISTATUS_PERM_ERR_SA_WRITE 0x0004ULL /* b61, user error */ 244 #define SISL_ISTATUS_PERM_ERR_RRQ_WRITE 0x0002ULL /* b62, user error */ 245 /* Page in wait accessing RCB/IOASA/RRQ is reported in b63. 246 * Same error in data/LXT/RHT access is reported via IOASA. 247 */ 248 #define SISL_ISTATUS_TEMP_ERR_PAGEIN 0x0001ULL /* b63, can be generated 249 * only when AFU auto 250 * retry is disabled. 251 * If user can determine 252 * the command that 253 * caused the error, it 254 * can be retried. 255 */ 256 #define SISL_ISTATUS_UNMASK (0x001FULL) /* 1 means unmasked */ 257 #define SISL_ISTATUS_MASK ~(SISL_ISTATUS_UNMASK) /* 1 means masked */ 258 259 __be64 intr_clear; 260 __be64 intr_mask; 261 __be64 ioarrin; /* only write what cmd_room permits */ 262 __be64 rrq_start; /* start & end are both inclusive */ 263 __be64 rrq_end; /* write sequence: start followed by end */ 264 __be64 cmd_room; 265 __be64 ctx_ctrl; /* least significant byte or b56:63 is LISN# */ 266 __be64 mbox_w; /* restricted use */ 267 __be64 sq_start; /* Submission Queue (R/W): write sequence and */ 268 __be64 sq_end; /* inclusion semantics are the same as RRQ */ 269 __be64 sq_head; /* Submission Queue Head (R): for debugging */ 270 __be64 sq_tail; /* Submission Queue TAIL (R/W): next IOARCB */ 271 __be64 sq_ctx_reset; /* Submission Queue Context Reset (R/W) */ 272 }; 273 274 /* per context provisioning & control MMIO */ 275 struct sisl_ctrl_map { 276 __be64 rht_start; 277 __be64 rht_cnt_id; 278 /* both cnt & ctx_id args must be ULL */ 279 #define SISL_RHT_CNT_ID(cnt, ctx_id) (((cnt) << 48) | ((ctx_id) << 32)) 280 281 __be64 ctx_cap; /* afu_rc below is when the capability is violated */ 282 #define SISL_CTX_CAP_PROXY_ISSUE 0x8000000000000000ULL /* afu_rc 0x21 */ 283 #define SISL_CTX_CAP_REAL_MODE 0x4000000000000000ULL /* afu_rc 0x21 */ 284 #define SISL_CTX_CAP_HOST_XLATE 0x2000000000000000ULL /* afu_rc 0x1a */ 285 #define SISL_CTX_CAP_PROXY_TARGET 0x1000000000000000ULL /* afu_rc 0x21 */ 286 #define SISL_CTX_CAP_AFU_CMD 0x0000000000000008ULL /* afu_rc 0x21 */ 287 #define SISL_CTX_CAP_GSCSI_CMD 0x0000000000000004ULL /* afu_rc 0x21 */ 288 #define SISL_CTX_CAP_WRITE_CMD 0x0000000000000002ULL /* afu_rc 0x21 */ 289 #define SISL_CTX_CAP_READ_CMD 0x0000000000000001ULL /* afu_rc 0x21 */ 290 __be64 mbox_r; 291 }; 292 293 /* single copy global regs */ 294 struct sisl_global_regs { 295 __be64 aintr_status; 296 /* 297 * In cxlflash, FC port/link are arranged in port pairs, each 298 * gets a byte of status: 299 * 300 * *_OTHER: other err, FC_ERRCAP[31:20] 301 * *_LOGO: target sent FLOGI/PLOGI/LOGO while logged in 302 * *_CRC_T: CRC threshold exceeded 303 * *_LOGI_R: login state machine timed out and retrying 304 * *_LOGI_F: login failed, FC_ERROR[19:0] 305 * *_LOGI_S: login succeeded 306 * *_LINK_DN: link online to offline 307 * *_LINK_UP: link offline to online 308 */ 309 #define SISL_ASTATUS_FC2_OTHER 0x80000000ULL /* b32 */ 310 #define SISL_ASTATUS_FC2_LOGO 0x40000000ULL /* b33 */ 311 #define SISL_ASTATUS_FC2_CRC_T 0x20000000ULL /* b34 */ 312 #define SISL_ASTATUS_FC2_LOGI_R 0x10000000ULL /* b35 */ 313 #define SISL_ASTATUS_FC2_LOGI_F 0x08000000ULL /* b36 */ 314 #define SISL_ASTATUS_FC2_LOGI_S 0x04000000ULL /* b37 */ 315 #define SISL_ASTATUS_FC2_LINK_DN 0x02000000ULL /* b38 */ 316 #define SISL_ASTATUS_FC2_LINK_UP 0x01000000ULL /* b39 */ 317 318 #define SISL_ASTATUS_FC3_OTHER 0x00800000ULL /* b40 */ 319 #define SISL_ASTATUS_FC3_LOGO 0x00400000ULL /* b41 */ 320 #define SISL_ASTATUS_FC3_CRC_T 0x00200000ULL /* b42 */ 321 #define SISL_ASTATUS_FC3_LOGI_R 0x00100000ULL /* b43 */ 322 #define SISL_ASTATUS_FC3_LOGI_F 0x00080000ULL /* b44 */ 323 #define SISL_ASTATUS_FC3_LOGI_S 0x00040000ULL /* b45 */ 324 #define SISL_ASTATUS_FC3_LINK_DN 0x00020000ULL /* b46 */ 325 #define SISL_ASTATUS_FC3_LINK_UP 0x00010000ULL /* b47 */ 326 327 #define SISL_ASTATUS_FC0_OTHER 0x00008000ULL /* b48 */ 328 #define SISL_ASTATUS_FC0_LOGO 0x00004000ULL /* b49 */ 329 #define SISL_ASTATUS_FC0_CRC_T 0x00002000ULL /* b50 */ 330 #define SISL_ASTATUS_FC0_LOGI_R 0x00001000ULL /* b51 */ 331 #define SISL_ASTATUS_FC0_LOGI_F 0x00000800ULL /* b52 */ 332 #define SISL_ASTATUS_FC0_LOGI_S 0x00000400ULL /* b53 */ 333 #define SISL_ASTATUS_FC0_LINK_DN 0x00000200ULL /* b54 */ 334 #define SISL_ASTATUS_FC0_LINK_UP 0x00000100ULL /* b55 */ 335 336 #define SISL_ASTATUS_FC1_OTHER 0x00000080ULL /* b56 */ 337 #define SISL_ASTATUS_FC1_LOGO 0x00000040ULL /* b57 */ 338 #define SISL_ASTATUS_FC1_CRC_T 0x00000020ULL /* b58 */ 339 #define SISL_ASTATUS_FC1_LOGI_R 0x00000010ULL /* b59 */ 340 #define SISL_ASTATUS_FC1_LOGI_F 0x00000008ULL /* b60 */ 341 #define SISL_ASTATUS_FC1_LOGI_S 0x00000004ULL /* b61 */ 342 #define SISL_ASTATUS_FC1_LINK_DN 0x00000002ULL /* b62 */ 343 #define SISL_ASTATUS_FC1_LINK_UP 0x00000001ULL /* b63 */ 344 345 #define SISL_FC_INTERNAL_UNMASK 0x0000000300000000ULL /* 1 means unmasked */ 346 #define SISL_FC_INTERNAL_MASK ~(SISL_FC_INTERNAL_UNMASK) 347 #define SISL_FC_INTERNAL_SHIFT 32 348 349 #define SISL_FC_SHUTDOWN_NORMAL 0x0000000000000010ULL 350 #define SISL_FC_SHUTDOWN_ABRUPT 0x0000000000000020ULL 351 352 #define SISL_STATUS_SHUTDOWN_ACTIVE 0x0000000000000010ULL 353 #define SISL_STATUS_SHUTDOWN_COMPLETE 0x0000000000000020ULL 354 355 #define SISL_ASTATUS_UNMASK 0xFFFFFFFFULL /* 1 means unmasked */ 356 #define SISL_ASTATUS_MASK ~(SISL_ASTATUS_UNMASK) /* 1 means masked */ 357 358 __be64 aintr_clear; 359 __be64 aintr_mask; 360 __be64 afu_ctrl; 361 __be64 afu_hb; 362 __be64 afu_scratch_pad; 363 __be64 afu_port_sel; 364 #define SISL_AFUCONF_AR_IOARCB 0x4000ULL 365 #define SISL_AFUCONF_AR_LXT 0x2000ULL 366 #define SISL_AFUCONF_AR_RHT 0x1000ULL 367 #define SISL_AFUCONF_AR_DATA 0x0800ULL 368 #define SISL_AFUCONF_AR_RSRC 0x0400ULL 369 #define SISL_AFUCONF_AR_IOASA 0x0200ULL 370 #define SISL_AFUCONF_AR_RRQ 0x0100ULL 371 /* Aggregate all Auto Retry Bits */ 372 #define SISL_AFUCONF_AR_ALL (SISL_AFUCONF_AR_IOARCB|SISL_AFUCONF_AR_LXT| \ 373 SISL_AFUCONF_AR_RHT|SISL_AFUCONF_AR_DATA| \ 374 SISL_AFUCONF_AR_RSRC|SISL_AFUCONF_AR_IOASA| \ 375 SISL_AFUCONF_AR_RRQ) 376 #ifdef __BIG_ENDIAN 377 #define SISL_AFUCONF_ENDIAN 0x0000ULL 378 #else 379 #define SISL_AFUCONF_ENDIAN 0x0020ULL 380 #endif 381 #define SISL_AFUCONF_MBOX_CLR_READ 0x0010ULL 382 __be64 afu_config; 383 __be64 rsvd[0xf8]; 384 __le64 afu_version; 385 __be64 interface_version; 386 #define SISL_INTVER_CAP_SHIFT 16 387 #define SISL_INTVER_MAJ_SHIFT 8 388 #define SISL_INTVER_CAP_MASK 0xFFFFFFFF00000000ULL 389 #define SISL_INTVER_MAJ_MASK 0x00000000FFFF0000ULL 390 #define SISL_INTVER_MIN_MASK 0x000000000000FFFFULL 391 #define SISL_INTVER_CAP_IOARRIN_CMD_MODE 0x800000000000ULL 392 #define SISL_INTVER_CAP_SQ_CMD_MODE 0x400000000000ULL 393 #define SISL_INTVER_CAP_RESERVED_CMD_MODE_A 0x200000000000ULL 394 #define SISL_INTVER_CAP_RESERVED_CMD_MODE_B 0x100000000000ULL 395 }; 396 397 #define CXLFLASH_NUM_FC_PORTS_PER_BANK 2 /* fixed # of ports per bank */ 398 #define CXLFLASH_MAX_FC_BANKS 2 /* max # of banks supported */ 399 #define CXLFLASH_MAX_FC_PORTS (CXLFLASH_NUM_FC_PORTS_PER_BANK * \ 400 CXLFLASH_MAX_FC_BANKS) 401 #define CXLFLASH_MAX_CONTEXT 512 /* number of contexts per AFU */ 402 #define CXLFLASH_NUM_VLUNS 512 /* number of vluns per AFU/port */ 403 #define CXLFLASH_NUM_REGS 512 /* number of registers per port */ 404 405 struct fc_port_bank { 406 __be64 fc_port_regs[CXLFLASH_NUM_FC_PORTS_PER_BANK][CXLFLASH_NUM_REGS]; 407 __be64 fc_port_luns[CXLFLASH_NUM_FC_PORTS_PER_BANK][CXLFLASH_NUM_VLUNS]; 408 }; 409 410 struct sisl_global_map { 411 union { 412 struct sisl_global_regs regs; 413 char page0[SIZE_4K]; /* page 0 */ 414 }; 415 416 char page1[SIZE_4K]; /* page 1 */ 417 418 struct fc_port_bank bank[CXLFLASH_MAX_FC_BANKS]; /* pages 2 - 9 */ 419 420 /* pages 10 - 15 are reserved */ 421 422 }; 423 424 /* 425 * CXL Flash Memory Map 426 * 427 * +-------------------------------+ 428 * | 512 * 64 KB User MMIO | 429 * | (per context) | 430 * | User Accessible | 431 * +-------------------------------+ 432 * | 512 * 128 B per context | 433 * | Provisioning and Control | 434 * | Trusted Process accessible | 435 * +-------------------------------+ 436 * | 64 KB Global | 437 * | Trusted Process accessible | 438 * +-------------------------------+ 439 */ 440 struct cxlflash_afu_map { 441 union { 442 struct sisl_host_map host; 443 char harea[SIZE_64K]; /* 64KB each */ 444 } hosts[CXLFLASH_MAX_CONTEXT]; 445 446 union { 447 struct sisl_ctrl_map ctrl; 448 char carea[cache_line_size()]; /* 128B each */ 449 } ctrls[CXLFLASH_MAX_CONTEXT]; 450 451 union { 452 struct sisl_global_map global; 453 char garea[SIZE_64K]; /* 64KB single block */ 454 }; 455 }; 456 457 /* 458 * LXT - LBA Translation Table 459 * LXT control blocks 460 */ 461 struct sisl_lxt_entry { 462 u64 rlba_base; /* bits 0:47 is base 463 * b48:55 is lun index 464 * b58:59 is write & read perms 465 * (if no perm, afu_rc=0x15) 466 * b60:63 is port_sel mask 467 */ 468 }; 469 470 /* 471 * RHT - Resource Handle Table 472 * Per the SISlite spec, RHT entries are to be 16-byte aligned 473 */ 474 struct sisl_rht_entry { 475 struct sisl_lxt_entry *lxt_start; 476 u32 lxt_cnt; 477 u16 rsvd; 478 u8 fp; /* format & perm nibbles. 479 * (if no perm, afu_rc=0x05) 480 */ 481 u8 nmask; 482 } __packed __aligned(16); 483 484 struct sisl_rht_entry_f1 { 485 u64 lun_id; 486 union { 487 struct { 488 u8 valid; 489 u8 rsvd[5]; 490 u8 fp; 491 u8 port_sel; 492 }; 493 494 u64 dw; 495 }; 496 } __packed __aligned(16); 497 498 /* make the fp byte */ 499 #define SISL_RHT_FP(fmt, perm) (((fmt) << 4) | (perm)) 500 501 /* make the fp byte for a clone from a source fp and clone flags 502 * flags must be only 2 LSB bits. 503 */ 504 #define SISL_RHT_FP_CLONE(src_fp, cln_flags) ((src_fp) & (0xFC | (cln_flags))) 505 506 #define RHT_PERM_READ 0x01U 507 #define RHT_PERM_WRITE 0x02U 508 #define RHT_PERM_RW (RHT_PERM_READ | RHT_PERM_WRITE) 509 510 /* extract the perm bits from a fp */ 511 #define SISL_RHT_PERM(fp) ((fp) & RHT_PERM_RW) 512 513 #define PORT0 0x01U 514 #define PORT1 0x02U 515 #define PORT2 0x04U 516 #define PORT3 0x08U 517 #define PORT_MASK(_n) ((1 << (_n)) - 1) 518 519 /* AFU Sync Mode byte */ 520 #define AFU_LW_SYNC 0x0U 521 #define AFU_HW_SYNC 0x1U 522 #define AFU_GSYNC 0x2U 523 524 /* Special Task Management Function CDB */ 525 #define TMF_LUN_RESET 0x1U 526 #define TMF_CLEAR_ACA 0x2U 527 528 529 #define SISLITE_MAX_WS_BLOCKS 512 530 531 #endif /* _SISLITE_H */ 532