1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Silicon Graphics International Corp. 5 * Copyright (c) 2014-2015 Alexander Motin <mav@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification. 14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 15 * substantially similar to the "NO WARRANTY" disclaimer below 16 * ("Disclaimer") and any redistribution must be conditioned upon 17 * including a substantially similar Disclaimer requirement for further 18 * binary redistribution. 19 * 20 * NO WARRANTY 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 29 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGES. 32 * 33 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_io.h#5 $ 34 * $FreeBSD$ 35 */ 36 /* 37 * CAM Target Layer data movement structures/interface. 38 * 39 * Author: Ken Merry <ken@FreeBSD.org> 40 */ 41 42 #ifndef _CTL_IO_H_ 43 #define _CTL_IO_H_ 44 45 #define CTL_MAX_CDBLEN 32 46 /* 47 * Uncomment this next line to enable printing out times for I/Os 48 * that take longer than CTL_TIME_IO_SECS seconds to get to the datamove 49 * and/or done stage. 50 */ 51 #define CTL_TIME_IO 52 #ifdef CTL_TIME_IO 53 #define CTL_TIME_IO_DEFAULT_SECS 90 54 #endif 55 56 /* 57 * Uncomment this next line to enable the CTL I/O delay feature. You 58 * can delay I/O at two different points -- datamove and done. This is 59 * useful for diagnosing abort conditions (for hosts that send an abort on a 60 * timeout), and for determining how long a host's timeout is. 61 */ 62 //#define CTL_IO_DELAY 63 64 typedef enum { 65 CTL_STATUS_NONE, /* No status */ 66 CTL_SUCCESS, /* Transaction completed successfully */ 67 CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */ 68 CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */ 69 CTL_ERROR, /* General CTL error XXX expand on this? */ 70 CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */ 71 CTL_CMD_ABORTED, /* Command aborted, don't return status */ 72 CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */ 73 CTL_AUTOSENSE = 0x1000 /* Autosense performed */ 74 } ctl_io_status; 75 76 /* 77 * WARNING: Keep the data in/out/none flags where they are. They're used 78 * in conjunction with ctl_cmd_flags. See comment above ctl_cmd_flags 79 * definition in ctl_private.h. 80 */ 81 typedef enum { 82 CTL_FLAG_NONE = 0x00000000, /* no flags */ 83 CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */ 84 CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */ 85 CTL_FLAG_DATA_NONE = 0x00000003, /* no data */ 86 CTL_FLAG_DATA_MASK = 0x00000003, 87 CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */ 88 CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */ 89 CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */ 90 CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */ 91 CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */ 92 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */ 93 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */ 94 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/ 95 CTL_FLAG_SENT_2OTHER_SC = 0x00010000, 96 CTL_FLAG_FROM_OTHER_SC = 0x00020000, 97 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/ 98 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS 99 addresses, not virtual ones*/ 100 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of 101 completing */ 102 #if 0 103 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */ 104 #endif 105 CTL_FLAG_NO_DATAMOVE = 0x00400000, 106 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/ 107 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/ 108 109 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */ 110 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */ 111 CTL_FLAG_STATUS_SENT = 0x10000000, /* Status sent by datamove */ 112 CTL_FLAG_SERSEQ_DONE = 0x20000000 /* All storage I/O started */ 113 } ctl_io_flags; 114 115 116 struct ctl_lba_len { 117 uint64_t lba; 118 uint32_t len; 119 }; 120 121 struct ctl_lba_len_flags { 122 uint64_t lba; 123 uint32_t len; 124 uint32_t flags; 125 #define CTL_LLF_FUA 0x04000000 126 #define CTL_LLF_DPO 0x08000000 127 #define CTL_LLF_READ 0x10000000 128 #define CTL_LLF_WRITE 0x20000000 129 #define CTL_LLF_VERIFY 0x40000000 130 #define CTL_LLF_COMPARE 0x80000000 131 }; 132 133 struct ctl_ptr_len_flags { 134 uint8_t *ptr; 135 uint32_t len; 136 uint32_t flags; 137 }; 138 139 union ctl_priv { 140 uint8_t bytes[sizeof(uint64_t) * 2]; 141 uint64_t integer; 142 uint64_t integers[2]; 143 void *ptr; 144 void *ptrs[2]; 145 }; 146 147 /* 148 * Number of CTL private areas. 149 */ 150 #define CTL_NUM_PRIV 6 151 152 /* 153 * Which private area are we using for a particular piece of data? 154 */ 155 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */ 156 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/ 157 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */ 158 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */ 159 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */ 160 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */ 161 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */ 162 163 #define CTL_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[0]) 164 #define CTL_SOFTC(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[1]) 165 #define CTL_BACKEND_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND_LUN].ptrs[0]) 166 #define CTL_PORT(io) (((struct ctl_softc *)CTL_SOFTC(io))-> \ 167 ctl_ports[(io)->io_hdr.nexus.targ_port]) 168 169 /* 170 * These are used only on Originating SC in XFER mode, where requests don't 171 * ever reach backends, so we can reuse backend's private storage. 172 */ 173 #define CTL_RSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[0]) 174 #define CTL_LSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[1]) 175 #define CTL_RSGLT(io) ((struct ctl_sg_entry *)CTL_RSGL(io)) 176 #define CTL_LSGLT(io) ((struct ctl_sg_entry *)CTL_LSGL(io)) 177 178 #define CTL_INVALID_PORTNAME 0xFF 179 #define CTL_UNMAPPED_IID 0xFF 180 181 struct ctl_sg_entry { 182 void *addr; 183 size_t len; 184 }; 185 186 typedef enum { 187 CTL_IO_NONE, 188 CTL_IO_SCSI, 189 CTL_IO_TASK, 190 } ctl_io_type; 191 192 struct ctl_nexus { 193 uint32_t initid; /* Initiator ID */ 194 uint32_t targ_port; /* Target port, filled in by PORT */ 195 uint32_t targ_lun; /* Destination lun */ 196 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */ 197 }; 198 199 typedef enum { 200 CTL_MSG_SERIALIZE, 201 CTL_MSG_R2R, 202 CTL_MSG_FINISH_IO, 203 CTL_MSG_BAD_JUJU, 204 CTL_MSG_MANAGE_TASKS, 205 CTL_MSG_PERS_ACTION, 206 CTL_MSG_DATAMOVE, 207 CTL_MSG_DATAMOVE_DONE, 208 CTL_MSG_UA, /* Set/clear UA on secondary. */ 209 CTL_MSG_PORT_SYNC, /* Information about port. */ 210 CTL_MSG_LUN_SYNC, /* Information about LUN. */ 211 CTL_MSG_IID_SYNC, /* Information about initiator. */ 212 CTL_MSG_LOGIN, /* Information about HA peer. */ 213 CTL_MSG_MODE_SYNC, /* Mode page current content. */ 214 CTL_MSG_FAILOVER /* Fake, never sent though the wire */ 215 } ctl_msg_type; 216 217 struct ctl_scsiio; 218 219 struct ctl_io_hdr { 220 uint32_t version; /* interface version XXX */ 221 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */ 222 ctl_msg_type msg_type; 223 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 224 uint32_t iid_indx; /* the index into the iid mapping */ 225 uint32_t flags; /* transaction flags */ 226 uint32_t status; /* transaction status */ 227 uint32_t port_status; /* trans status, set by PORT, 0 = good*/ 228 uint32_t timeout; /* timeout in ms */ 229 uint32_t retries; /* retry count */ 230 #ifdef CTL_IO_DELAY 231 struct callout delay_callout; 232 #endif /* CTL_IO_DELAY */ 233 #ifdef CTL_TIME_IO 234 time_t start_time; /* I/O start time */ 235 struct bintime start_bt; /* Timer start ticks */ 236 struct bintime dma_start_bt; /* DMA start ticks */ 237 struct bintime dma_bt; /* DMA total ticks */ 238 #endif /* CTL_TIME_IO */ 239 uint32_t num_dmas; /* Number of DMAs */ 240 union ctl_io *remote_io; /* I/O counterpart on remote HA side */ 241 union ctl_io *blocker; /* I/O blocking this one */ 242 void *pool; /* I/O pool */ 243 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 244 TAILQ_HEAD(, ctl_io_hdr) blocked_queue; /* I/Os blocked by this one */ 245 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 246 TAILQ_ENTRY(ctl_io_hdr) ooa_links; /* ooa_queue links */ 247 TAILQ_ENTRY(ctl_io_hdr) blocked_links; /* blocked_queue links */ 248 }; 249 250 typedef enum { 251 CTL_TAG_UNTAGGED, 252 CTL_TAG_SIMPLE, 253 CTL_TAG_ORDERED, 254 CTL_TAG_HEAD_OF_QUEUE, 255 CTL_TAG_ACA 256 } ctl_tag_type; 257 258 union ctl_io; 259 260 typedef void (*ctl_ref)(void *arg, int diff); 261 262 /* 263 * SCSI passthrough I/O structure for the CAM Target Layer. Note 264 * that some of these fields are here for completeness, but they aren't 265 * used in the CTL implementation. e.g., timeout and retries won't be 266 * used. 267 * 268 * Note: Make sure the io_hdr is *always* the first element in this 269 * structure. 270 */ 271 struct ctl_scsiio { 272 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 273 274 /* 275 * The ext_* fields are generally intended for frontend use; CTL itself 276 * doesn't modify or use them. 277 */ 278 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 279 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 280 uint32_t ext_data_len; /* Data transfer length */ 281 uint32_t ext_data_filled; /* Amount of data filled so far */ 282 283 /* 284 * The number of scatter/gather entries in the list pointed to 285 * by kern_data_ptr. 0 means there is no list, just a data pointer. 286 */ 287 uint32_t kern_sg_entries; 288 289 uint32_t rem_sg_entries; /* Unused. */ 290 291 /* 292 * The data pointer or a pointer to the scatter/gather list. 293 */ 294 uint8_t *kern_data_ptr; 295 296 /* 297 * Length of the data buffer or scatter/gather list. It's also 298 * the length of this particular piece of the data transfer, 299 * ie. number of bytes expected to be transferred by the current 300 * invocation of frontend's datamove() callback. It's always 301 * less than or equal to kern_total_len. 302 */ 303 uint32_t kern_data_len; 304 305 /* 306 * Total length of data to be transferred during this particular 307 * SCSI command, as decoded from SCSI CDB. 308 */ 309 uint32_t kern_total_len; 310 311 /* 312 * Amount of data left after the current data transfer. 313 */ 314 uint32_t kern_data_resid; 315 316 /* 317 * Byte offset of this transfer, equal to the amount of data 318 * already transferred for this SCSI command during previous 319 * datamove() invocations. 320 */ 321 uint32_t kern_rel_offset; 322 323 struct scsi_sense_data sense_data; /* sense data */ 324 uint8_t sense_len; /* Returned sense length */ 325 uint8_t scsi_status; /* SCSI status byte */ 326 uint8_t sense_residual; /* Unused. */ 327 uint32_t residual; /* Unused */ 328 uint32_t tag_num; /* tag number */ 329 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 330 uint8_t cdb_len; /* CDB length */ 331 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 332 int (*be_move_done)(union ctl_io *io); /* called by fe */ 333 int (*io_cont)(union ctl_io *io); /* to continue processing */ 334 ctl_ref kern_data_ref; /* Method to reference/release data */ 335 void *kern_data_arg; /* Opaque argument for kern_data_ref() */ 336 }; 337 338 typedef enum { 339 CTL_TASK_ABORT_TASK, 340 CTL_TASK_ABORT_TASK_SET, 341 CTL_TASK_CLEAR_ACA, 342 CTL_TASK_CLEAR_TASK_SET, 343 CTL_TASK_I_T_NEXUS_RESET, 344 CTL_TASK_LUN_RESET, 345 CTL_TASK_TARGET_RESET, 346 CTL_TASK_BUS_RESET, 347 CTL_TASK_PORT_LOGIN, 348 CTL_TASK_PORT_LOGOUT, 349 CTL_TASK_QUERY_TASK, 350 CTL_TASK_QUERY_TASK_SET, 351 CTL_TASK_QUERY_ASYNC_EVENT 352 } ctl_task_type; 353 354 typedef enum { 355 CTL_TASK_FUNCTION_COMPLETE, 356 CTL_TASK_FUNCTION_SUCCEEDED, 357 CTL_TASK_FUNCTION_REJECTED, 358 CTL_TASK_LUN_DOES_NOT_EXIST, 359 CTL_TASK_FUNCTION_NOT_SUPPORTED 360 } ctl_task_status; 361 362 /* 363 * Task management I/O structure. Aborts, bus resets, etc., are sent using 364 * this structure. 365 * 366 * Note: Make sure the io_hdr is *always* the first element in this 367 * structure. 368 */ 369 struct ctl_taskio { 370 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 371 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 372 uint32_t tag_num; /* tag number */ 373 ctl_tag_type tag_type; /* simple, ordered, etc. */ 374 uint8_t task_status; /* Complete, Succeeded, etc. */ 375 uint8_t task_resp[3];/* Response information */ 376 }; 377 378 379 /* 380 * HA link messages. 381 */ 382 #define CTL_HA_VERSION 3 383 384 /* 385 * Used for CTL_MSG_LOGIN. 386 */ 387 struct ctl_ha_msg_login { 388 ctl_msg_type msg_type; 389 int version; 390 int ha_mode; 391 int ha_id; 392 int max_luns; 393 int max_ports; 394 int max_init_per_port; 395 }; 396 397 typedef enum { 398 CTL_PR_REG_KEY, 399 CTL_PR_UNREG_KEY, 400 CTL_PR_PREEMPT, 401 CTL_PR_CLEAR, 402 CTL_PR_RESERVE, 403 CTL_PR_RELEASE 404 } ctl_pr_action; 405 406 /* 407 * The PR info is specifically for sending Persistent Reserve actions 408 * to the other SC which it must also act on. 409 * 410 * Note: Make sure the io_hdr is *always* the first element in this 411 * structure. 412 */ 413 struct ctl_pr_info { 414 ctl_pr_action action; 415 uint8_t sa_res_key[8]; 416 uint8_t res_type; 417 uint32_t residx; 418 }; 419 420 struct ctl_ha_msg_hdr { 421 ctl_msg_type msg_type; 422 uint32_t status; /* transaction status */ 423 union ctl_io *original_sc; 424 union ctl_io *serializing_sc; 425 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 426 }; 427 428 #define CTL_HA_MAX_SG_ENTRIES 16 429 #define CTL_HA_DATAMOVE_SEGMENT 131072 430 431 /* 432 * Used for CTL_MSG_PERS_ACTION. 433 */ 434 struct ctl_ha_msg_pr { 435 struct ctl_ha_msg_hdr hdr; 436 struct ctl_pr_info pr_info; 437 }; 438 439 /* 440 * Used for CTL_MSG_UA. 441 */ 442 struct ctl_ha_msg_ua { 443 struct ctl_ha_msg_hdr hdr; 444 int ua_all; 445 int ua_set; 446 int ua_type; 447 uint8_t ua_info[8]; 448 }; 449 450 /* 451 * The S/G handling here is a little different than the standard ctl_scsiio 452 * structure, because we can't pass data by reference in between controllers. 453 * The S/G list in the ctl_scsiio struct is normally passed in the 454 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 455 * even if there is only one entry. 456 * 457 * Used for CTL_MSG_DATAMOVE. 458 */ 459 struct ctl_ha_msg_dt { 460 struct ctl_ha_msg_hdr hdr; 461 ctl_io_flags flags; /* Only I/O flags are used here */ 462 uint32_t sg_sequence; /* S/G portion number */ 463 uint8_t sg_last; /* last S/G batch = 1 */ 464 uint32_t sent_sg_entries; /* previous S/G count */ 465 uint32_t cur_sg_entries; /* current S/G entries */ 466 uint32_t kern_sg_entries; /* total S/G entries */ 467 uint32_t kern_data_len; /* Length of this S/G list */ 468 uint32_t kern_total_len; /* Total length of this 469 transaction */ 470 uint32_t kern_data_resid; /* Length left to transfer 471 after this*/ 472 uint32_t kern_rel_offset; /* Byte Offset of this 473 transfer */ 474 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 475 }; 476 477 /* 478 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU, 479 * and CTL_MSG_DATAMOVE_DONE. 480 */ 481 struct ctl_ha_msg_scsi { 482 struct ctl_ha_msg_hdr hdr; 483 uint32_t tag_num; /* tag number */ 484 ctl_tag_type tag_type; /* simple, ordered, etc. */ 485 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 486 uint8_t cdb_len; /* CDB length */ 487 uint8_t scsi_status; /* SCSI status byte */ 488 uint8_t sense_len; /* Returned sense length */ 489 uint32_t port_status; /* trans status, set by FETD, 490 0 = good*/ 491 uint32_t kern_data_resid; /* for DATAMOVE_DONE */ 492 struct scsi_sense_data sense_data; /* sense data */ 493 }; 494 495 /* 496 * Used for CTL_MSG_MANAGE_TASKS. 497 */ 498 struct ctl_ha_msg_task { 499 struct ctl_ha_msg_hdr hdr; 500 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 501 uint32_t tag_num; /* tag number */ 502 ctl_tag_type tag_type; /* simple, ordered, etc. */ 503 }; 504 505 /* 506 * Used for CTL_MSG_PORT_SYNC. 507 */ 508 struct ctl_ha_msg_port { 509 struct ctl_ha_msg_hdr hdr; 510 int port_type; 511 int physical_port; 512 int virtual_port; 513 int status; 514 int name_len; 515 int lun_map_len; 516 int port_devid_len; 517 int target_devid_len; 518 int init_devid_len; 519 uint8_t data[]; 520 }; 521 522 /* 523 * Used for CTL_MSG_LUN_SYNC. 524 */ 525 struct ctl_ha_msg_lun { 526 struct ctl_ha_msg_hdr hdr; 527 int flags; 528 unsigned int pr_generation; 529 uint32_t pr_res_idx; 530 uint8_t pr_res_type; 531 int lun_devid_len; 532 int pr_key_count; 533 uint8_t data[]; 534 }; 535 536 struct ctl_ha_msg_lun_pr_key { 537 uint32_t pr_iid; 538 uint64_t pr_key; 539 }; 540 541 /* 542 * Used for CTL_MSG_IID_SYNC. 543 */ 544 struct ctl_ha_msg_iid { 545 struct ctl_ha_msg_hdr hdr; 546 int in_use; 547 int name_len; 548 uint64_t wwpn; 549 uint8_t data[]; 550 }; 551 552 /* 553 * Used for CTL_MSG_MODE_SYNC. 554 */ 555 struct ctl_ha_msg_mode { 556 struct ctl_ha_msg_hdr hdr; 557 uint8_t page_code; 558 uint8_t subpage; 559 uint16_t page_len; 560 uint8_t data[]; 561 }; 562 563 union ctl_ha_msg { 564 struct ctl_ha_msg_hdr hdr; 565 struct ctl_ha_msg_task task; 566 struct ctl_ha_msg_scsi scsi; 567 struct ctl_ha_msg_dt dt; 568 struct ctl_ha_msg_pr pr; 569 struct ctl_ha_msg_ua ua; 570 struct ctl_ha_msg_port port; 571 struct ctl_ha_msg_lun lun; 572 struct ctl_ha_msg_iid iid; 573 struct ctl_ha_msg_login login; 574 struct ctl_ha_msg_mode mode; 575 }; 576 577 struct ctl_prio { 578 struct ctl_io_hdr io_hdr; 579 struct ctl_ha_msg_pr pr_msg; 580 }; 581 582 union ctl_io { 583 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 584 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 585 struct ctl_taskio taskio; /* SCSI task management/reset */ 586 struct ctl_prio presio; /* update per. res info on other SC */ 587 }; 588 589 #ifdef _KERNEL 590 591 union ctl_io *ctl_alloc_io(void *pool_ref); 592 union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 593 void ctl_free_io(union ctl_io *io); 594 void ctl_zero_io(union ctl_io *io); 595 596 #endif /* _KERNEL */ 597 598 #endif /* _CTL_IO_H_ */ 599 600 /* 601 * vim: ts=8 602 */ 603