1 /*- 2 * Copyright (c) 2003 Silicon Graphics International Corp. 3 * Copyright (c) 2014-2015 Alexander Motin <mav@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer, 11 * without modification. 12 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 13 * substantially similar to the "NO WARRANTY" disclaimer below 14 * ("Disclaimer") and any redistribution must be conditioned upon 15 * including a substantially similar Disclaimer requirement for further 16 * binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 28 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGES. 30 * 31 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_io.h#5 $ 32 * $FreeBSD$ 33 */ 34 /* 35 * CAM Target Layer data movement structures/interface. 36 * 37 * Author: Ken Merry <ken@FreeBSD.org> 38 */ 39 40 #ifndef _CTL_IO_H_ 41 #define _CTL_IO_H_ 42 43 #ifdef _CTL_C 44 #define EXTERN(__var,__val) __var = __val 45 #else 46 #define EXTERN(__var,__val) extern __var 47 #endif 48 49 #define CTL_MAX_CDBLEN 32 50 /* 51 * Uncomment this next line to enable printing out times for I/Os 52 * that take longer than CTL_TIME_IO_SECS seconds to get to the datamove 53 * and/or done stage. 54 */ 55 #define CTL_TIME_IO 56 #ifdef CTL_TIME_IO 57 #define CTL_TIME_IO_DEFAULT_SECS 90 58 EXTERN(int ctl_time_io_secs, CTL_TIME_IO_DEFAULT_SECS); 59 #endif 60 61 /* 62 * Uncomment this next line to enable the CTL I/O delay feature. You 63 * can delay I/O at two different points -- datamove and done. This is 64 * useful for diagnosing abort conditions (for hosts that send an abort on a 65 * timeout), and for determining how long a host's timeout is. 66 */ 67 //#define CTL_IO_DELAY 68 69 typedef enum { 70 CTL_STATUS_NONE, /* No status */ 71 CTL_SUCCESS, /* Transaction completed successfully */ 72 CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */ 73 CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */ 74 CTL_ERROR, /* General CTL error XXX expand on this? */ 75 CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */ 76 CTL_CMD_ABORTED, /* Command aborted, don't return status */ 77 CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */ 78 CTL_AUTOSENSE = 0x1000 /* Autosense performed */ 79 } ctl_io_status; 80 81 /* 82 * WARNING: Keep the data in/out/none flags where they are. They're used 83 * in conjunction with ctl_cmd_flags. See comment above ctl_cmd_flags 84 * definition in ctl_private.h. 85 */ 86 typedef enum { 87 CTL_FLAG_NONE = 0x00000000, /* no flags */ 88 CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */ 89 CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */ 90 CTL_FLAG_DATA_NONE = 0x00000003, /* no data */ 91 CTL_FLAG_DATA_MASK = 0x00000003, 92 CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */ 93 CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */ 94 CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */ 95 CTL_FLAG_BLOCKED = 0x00000200, /* on the blocked queue */ 96 CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */ 97 CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */ 98 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */ 99 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */ 100 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/ 101 CTL_FLAG_SENT_2OTHER_SC = 0x00010000, 102 CTL_FLAG_FROM_OTHER_SC = 0x00020000, 103 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/ 104 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS 105 addresses, not virtual ones*/ 106 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of 107 completing */ 108 #if 0 109 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */ 110 #endif 111 CTL_FLAG_NO_DATAMOVE = 0x00400000, 112 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/ 113 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/ 114 115 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */ 116 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */ 117 CTL_FLAG_STATUS_SENT = 0x10000000, /* Status sent by datamove */ 118 CTL_FLAG_SERSEQ_DONE = 0x20000000 /* All storage I/O started */ 119 } ctl_io_flags; 120 121 122 struct ctl_lba_len { 123 uint64_t lba; 124 uint32_t len; 125 }; 126 127 struct ctl_lba_len_flags { 128 uint64_t lba; 129 uint32_t len; 130 uint32_t flags; 131 #define CTL_LLF_FUA 0x04000000 132 #define CTL_LLF_DPO 0x08000000 133 #define CTL_LLF_READ 0x10000000 134 #define CTL_LLF_WRITE 0x20000000 135 #define CTL_LLF_VERIFY 0x40000000 136 #define CTL_LLF_COMPARE 0x80000000 137 }; 138 139 struct ctl_ptr_len_flags { 140 uint8_t *ptr; 141 uint32_t len; 142 uint32_t flags; 143 }; 144 145 union ctl_priv { 146 uint8_t bytes[sizeof(uint64_t) * 2]; 147 uint64_t integer; 148 void *ptr; 149 }; 150 151 /* 152 * Number of CTL private areas. 153 */ 154 #define CTL_NUM_PRIV 6 155 156 /* 157 * Which private area are we using for a particular piece of data? 158 */ 159 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */ 160 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/ 161 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */ 162 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */ 163 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */ 164 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */ 165 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */ 166 167 #define CTL_INVALID_PORTNAME 0xFF 168 #define CTL_UNMAPPED_IID 0xFF 169 170 struct ctl_sg_entry { 171 void *addr; 172 size_t len; 173 }; 174 175 typedef enum { 176 CTL_IO_NONE, 177 CTL_IO_SCSI, 178 CTL_IO_TASK, 179 } ctl_io_type; 180 181 struct ctl_nexus { 182 uint32_t initid; /* Initiator ID */ 183 uint32_t targ_port; /* Target port, filled in by PORT */ 184 uint32_t targ_lun; /* Destination lun */ 185 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */ 186 }; 187 188 typedef enum { 189 CTL_MSG_SERIALIZE, 190 CTL_MSG_R2R, 191 CTL_MSG_FINISH_IO, 192 CTL_MSG_BAD_JUJU, 193 CTL_MSG_MANAGE_TASKS, 194 CTL_MSG_PERS_ACTION, 195 CTL_MSG_DATAMOVE, 196 CTL_MSG_DATAMOVE_DONE, 197 CTL_MSG_UA, /* Set/clear UA on secondary. */ 198 CTL_MSG_PORT_SYNC, /* Information about port. */ 199 CTL_MSG_LUN_SYNC, /* Information about LUN. */ 200 CTL_MSG_IID_SYNC, /* Information about initiator. */ 201 CTL_MSG_LOGIN, /* Information about HA peer. */ 202 CTL_MSG_MODE_SYNC, /* Mode page current content. */ 203 CTL_MSG_FAILOVER /* Fake, never sent though the wire */ 204 } ctl_msg_type; 205 206 struct ctl_scsiio; 207 208 struct ctl_io_hdr { 209 uint32_t version; /* interface version XXX */ 210 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */ 211 ctl_msg_type msg_type; 212 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 213 uint32_t iid_indx; /* the index into the iid mapping */ 214 uint32_t flags; /* transaction flags */ 215 uint32_t status; /* transaction status */ 216 uint32_t port_status; /* trans status, set by PORT, 0 = good*/ 217 uint32_t timeout; /* timeout in ms */ 218 uint32_t retries; /* retry count */ 219 #ifdef CTL_IO_DELAY 220 struct callout delay_callout; 221 #endif /* CTL_IO_DELAY */ 222 #ifdef CTL_TIME_IO 223 time_t start_time; /* I/O start time */ 224 struct bintime start_bt; /* Timer start ticks */ 225 struct bintime dma_start_bt; /* DMA start ticks */ 226 struct bintime dma_bt; /* DMA total ticks */ 227 #endif /* CTL_TIME_IO */ 228 uint32_t num_dmas; /* Number of DMAs */ 229 union ctl_io *original_sc; 230 union ctl_io *serializing_sc; 231 void *pool; /* I/O pool */ 232 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 233 struct ctl_sg_entry *remote_sglist; 234 struct ctl_sg_entry *local_sglist; 235 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 236 TAILQ_ENTRY(ctl_io_hdr) ooa_links; 237 TAILQ_ENTRY(ctl_io_hdr) blocked_links; 238 }; 239 240 typedef enum { 241 CTL_TAG_UNTAGGED, 242 CTL_TAG_SIMPLE, 243 CTL_TAG_ORDERED, 244 CTL_TAG_HEAD_OF_QUEUE, 245 CTL_TAG_ACA 246 } ctl_tag_type; 247 248 union ctl_io; 249 250 /* 251 * SCSI passthrough I/O structure for the CAM Target Layer. Note 252 * that some of these fields are here for completeness, but they aren't 253 * used in the CTL implementation. e.g., timeout and retries won't be 254 * used. 255 * 256 * Note: Make sure the io_hdr is *always* the first element in this 257 * structure. 258 */ 259 struct ctl_scsiio { 260 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 261 262 /* 263 * The ext_* fields are generally intended for frontend use; CTL itself 264 * doesn't modify or use them. 265 */ 266 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 267 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 268 uint32_t ext_data_len; /* Data transfer length */ 269 uint32_t ext_data_filled; /* Amount of data filled so far */ 270 271 /* 272 * The number of scatter/gather entries in the list pointed to 273 * by kern_data_ptr. 0 means there is no list, just a data pointer. 274 */ 275 uint32_t kern_sg_entries; 276 277 uint32_t rem_sg_entries; /* Unused. */ 278 279 /* 280 * The data pointer or a pointer to the scatter/gather list. 281 */ 282 uint8_t *kern_data_ptr; 283 284 /* 285 * Length of the data buffer or scatter/gather list. It's also 286 * the length of this particular piece of the data transfer, 287 * ie. number of bytes expected to be transferred by the current 288 * invocation of frontend's datamove() callback. It's always 289 * less than or equal to kern_total_len. 290 */ 291 uint32_t kern_data_len; 292 293 /* 294 * Total length of data to be transferred during this particular 295 * SCSI command, as decoded from SCSI CDB. 296 */ 297 uint32_t kern_total_len; 298 299 /* 300 * Amount of data left after the current data transfer. 301 */ 302 uint32_t kern_data_resid; 303 304 /* 305 * Byte offset of this transfer, equal to the amount of data 306 * already transferred for this SCSI command during previous 307 * datamove() invocations. 308 */ 309 uint32_t kern_rel_offset; 310 311 struct scsi_sense_data sense_data; /* sense data */ 312 uint8_t sense_len; /* Returned sense length */ 313 uint8_t scsi_status; /* SCSI status byte */ 314 uint8_t sense_residual; /* Unused. */ 315 uint32_t residual; /* data residual length */ 316 uint32_t tag_num; /* tag number */ 317 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 318 uint8_t cdb_len; /* CDB length */ 319 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 320 int (*be_move_done)(union ctl_io *io); /* called by fe */ 321 int (*io_cont)(union ctl_io *io); /* to continue processing */ 322 }; 323 324 typedef enum { 325 CTL_TASK_ABORT_TASK, 326 CTL_TASK_ABORT_TASK_SET, 327 CTL_TASK_CLEAR_ACA, 328 CTL_TASK_CLEAR_TASK_SET, 329 CTL_TASK_I_T_NEXUS_RESET, 330 CTL_TASK_LUN_RESET, 331 CTL_TASK_TARGET_RESET, 332 CTL_TASK_BUS_RESET, 333 CTL_TASK_PORT_LOGIN, 334 CTL_TASK_PORT_LOGOUT, 335 CTL_TASK_QUERY_TASK, 336 CTL_TASK_QUERY_TASK_SET, 337 CTL_TASK_QUERY_ASYNC_EVENT 338 } ctl_task_type; 339 340 typedef enum { 341 CTL_TASK_FUNCTION_COMPLETE, 342 CTL_TASK_FUNCTION_SUCCEEDED, 343 CTL_TASK_FUNCTION_REJECTED, 344 CTL_TASK_LUN_DOES_NOT_EXIST, 345 CTL_TASK_FUNCTION_NOT_SUPPORTED 346 } ctl_task_status; 347 348 /* 349 * Task management I/O structure. Aborts, bus resets, etc., are sent using 350 * this structure. 351 * 352 * Note: Make sure the io_hdr is *always* the first element in this 353 * structure. 354 */ 355 struct ctl_taskio { 356 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 357 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 358 uint32_t tag_num; /* tag number */ 359 ctl_tag_type tag_type; /* simple, ordered, etc. */ 360 uint8_t task_status; /* Complete, Succeeded, etc. */ 361 uint8_t task_resp[3];/* Response information */ 362 }; 363 364 365 /* 366 * HA link messages. 367 */ 368 #define CTL_HA_VERSION 1 369 370 /* 371 * Used for CTL_MSG_LOGIN. 372 */ 373 struct ctl_ha_msg_login { 374 ctl_msg_type msg_type; 375 int version; 376 int ha_mode; 377 int ha_id; 378 int max_luns; 379 int max_ports; 380 int max_init_per_port; 381 }; 382 383 typedef enum { 384 CTL_PR_REG_KEY, 385 CTL_PR_UNREG_KEY, 386 CTL_PR_PREEMPT, 387 CTL_PR_CLEAR, 388 CTL_PR_RESERVE, 389 CTL_PR_RELEASE 390 } ctl_pr_action; 391 392 /* 393 * The PR info is specifically for sending Persistent Reserve actions 394 * to the other SC which it must also act on. 395 * 396 * Note: Make sure the io_hdr is *always* the first element in this 397 * structure. 398 */ 399 struct ctl_pr_info { 400 ctl_pr_action action; 401 uint8_t sa_res_key[8]; 402 uint8_t res_type; 403 uint32_t residx; 404 }; 405 406 struct ctl_ha_msg_hdr { 407 ctl_msg_type msg_type; 408 uint32_t status; /* transaction status */ 409 union ctl_io *original_sc; 410 union ctl_io *serializing_sc; 411 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 412 }; 413 414 #define CTL_HA_MAX_SG_ENTRIES 16 415 #define CTL_HA_DATAMOVE_SEGMENT 131072 416 417 /* 418 * Used for CTL_MSG_PERS_ACTION. 419 */ 420 struct ctl_ha_msg_pr { 421 struct ctl_ha_msg_hdr hdr; 422 struct ctl_pr_info pr_info; 423 }; 424 425 /* 426 * Used for CTL_MSG_UA. 427 */ 428 struct ctl_ha_msg_ua { 429 struct ctl_ha_msg_hdr hdr; 430 int ua_all; 431 int ua_set; 432 int ua_type; 433 uint8_t ua_info[8]; 434 }; 435 436 /* 437 * The S/G handling here is a little different than the standard ctl_scsiio 438 * structure, because we can't pass data by reference in between controllers. 439 * The S/G list in the ctl_scsiio struct is normally passed in the 440 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 441 * even if there is only one entry. 442 * 443 * Used for CTL_MSG_DATAMOVE. 444 */ 445 struct ctl_ha_msg_dt { 446 struct ctl_ha_msg_hdr hdr; 447 ctl_io_flags flags; /* Only I/O flags are used here */ 448 uint32_t sg_sequence; /* S/G portion number */ 449 uint8_t sg_last; /* last S/G batch = 1 */ 450 uint32_t sent_sg_entries; /* previous S/G count */ 451 uint32_t cur_sg_entries; /* current S/G entries */ 452 uint32_t kern_sg_entries; /* total S/G entries */ 453 uint32_t kern_data_len; /* Length of this S/G list */ 454 uint32_t kern_total_len; /* Total length of this 455 transaction */ 456 uint32_t kern_data_resid; /* Length left to transfer 457 after this*/ 458 uint32_t kern_rel_offset; /* Byte Offset of this 459 transfer */ 460 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 461 }; 462 463 /* 464 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU. 465 */ 466 struct ctl_ha_msg_scsi { 467 struct ctl_ha_msg_hdr hdr; 468 uint32_t tag_num; /* tag number */ 469 ctl_tag_type tag_type; /* simple, ordered, etc. */ 470 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 471 uint8_t cdb_len; /* CDB length */ 472 uint8_t scsi_status; /* SCSI status byte */ 473 uint8_t sense_len; /* Returned sense length */ 474 uint8_t sense_residual; /* sense residual length */ 475 uint32_t residual; /* data residual length */ 476 uint32_t fetd_status; /* trans status, set by FETD, 477 0 = good*/ 478 struct scsi_sense_data sense_data; /* sense data */ 479 }; 480 481 /* 482 * Used for CTL_MSG_MANAGE_TASKS. 483 */ 484 struct ctl_ha_msg_task { 485 struct ctl_ha_msg_hdr hdr; 486 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 487 uint32_t tag_num; /* tag number */ 488 ctl_tag_type tag_type; /* simple, ordered, etc. */ 489 }; 490 491 /* 492 * Used for CTL_MSG_PORT_SYNC. 493 */ 494 struct ctl_ha_msg_port { 495 struct ctl_ha_msg_hdr hdr; 496 int port_type; 497 int physical_port; 498 int virtual_port; 499 int status; 500 int name_len; 501 int lun_map_len; 502 int port_devid_len; 503 int target_devid_len; 504 int init_devid_len; 505 uint8_t data[]; 506 }; 507 508 /* 509 * Used for CTL_MSG_LUN_SYNC. 510 */ 511 struct ctl_ha_msg_lun { 512 struct ctl_ha_msg_hdr hdr; 513 int flags; 514 unsigned int pr_generation; 515 uint32_t pr_res_idx; 516 uint8_t pr_res_type; 517 int lun_devid_len; 518 int pr_key_count; 519 uint8_t data[]; 520 }; 521 522 struct ctl_ha_msg_lun_pr_key { 523 uint32_t pr_iid; 524 uint64_t pr_key; 525 }; 526 527 /* 528 * Used for CTL_MSG_IID_SYNC. 529 */ 530 struct ctl_ha_msg_iid { 531 struct ctl_ha_msg_hdr hdr; 532 int in_use; 533 int name_len; 534 uint64_t wwpn; 535 uint8_t data[]; 536 }; 537 538 /* 539 * Used for CTL_MSG_MODE_SYNC. 540 */ 541 struct ctl_ha_msg_mode { 542 struct ctl_ha_msg_hdr hdr; 543 uint8_t page_code; 544 uint8_t subpage; 545 uint16_t page_len; 546 uint8_t data[]; 547 }; 548 549 union ctl_ha_msg { 550 struct ctl_ha_msg_hdr hdr; 551 struct ctl_ha_msg_task task; 552 struct ctl_ha_msg_scsi scsi; 553 struct ctl_ha_msg_dt dt; 554 struct ctl_ha_msg_pr pr; 555 struct ctl_ha_msg_ua ua; 556 struct ctl_ha_msg_port port; 557 struct ctl_ha_msg_lun lun; 558 struct ctl_ha_msg_iid iid; 559 struct ctl_ha_msg_login login; 560 struct ctl_ha_msg_mode mode; 561 }; 562 563 struct ctl_prio { 564 struct ctl_io_hdr io_hdr; 565 struct ctl_ha_msg_pr pr_msg; 566 }; 567 568 union ctl_io { 569 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 570 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 571 struct ctl_taskio taskio; /* SCSI task management/reset */ 572 struct ctl_prio presio; /* update per. res info on other SC */ 573 }; 574 575 #ifdef _KERNEL 576 577 union ctl_io *ctl_alloc_io(void *pool_ref); 578 union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 579 void ctl_free_io(union ctl_io *io); 580 void ctl_zero_io(union ctl_io *io); 581 582 #endif /* _KERNEL */ 583 584 #endif /* _CTL_IO_H_ */ 585 586 /* 587 * vim: ts=8 588 */ 589