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#ifndef _KERNEL 46#include <stdbool.h> 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#endif 59 60/* 61 * Uncomment this next line to enable the CTL I/O delay feature. You 62 * can delay I/O at two different points -- datamove and done. This is 63 * useful for diagnosing abort conditions (for hosts that send an abort on a 64 * timeout), and for determining how long a host's timeout is. 65 */ 66//#define CTL_IO_DELAY 67 68typedef enum { 69 CTL_STATUS_NONE, /* No status */ 70 CTL_SUCCESS, /* Transaction completed successfully */ 71 CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */ 72 CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */ 73 CTL_ERROR, /* General CTL error XXX expand on this? */ 74 CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */ 75 CTL_CMD_ABORTED, /* Command aborted, don't return status */ 76 CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */ 77 CTL_AUTOSENSE = 0x1000 /* Autosense performed */ 78} ctl_io_status; 79 80/* 81 * WARNING: Keep the data in/out/none flags where they are. They're used 82 * in conjunction with ctl_cmd_flags. See comment above ctl_cmd_flags 83 * definition in ctl_private.h. 84 */ 85typedef enum { 86 CTL_FLAG_NONE = 0x00000000, /* no flags */ 87 CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */ 88 CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */ 89 CTL_FLAG_DATA_NONE = 0x00000003, /* no data */ 90 CTL_FLAG_DATA_MASK = 0x00000003, 91 CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */ 92 CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */ 93 CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */ 94 CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */ 95 CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */ 96 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */ 97 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */ 98 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/ 99 CTL_FLAG_SENT_2OTHER_SC = 0x00010000, 100 CTL_FLAG_FROM_OTHER_SC = 0x00020000, 101 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/ 102 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS 103 addresses, not virtual ones*/ 104 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of 105 completing */ 106#if 0 107 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */ 108#endif 109 CTL_FLAG_NO_DATAMOVE = 0x00400000, 110 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/ 111 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/ 112 113 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */ 114 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */ 115 CTL_FLAG_STATUS_SENT = 0x10000000, /* Status sent by datamove */ 116 CTL_FLAG_SERSEQ_DONE = 0x20000000 /* All storage I/O started */ 117} ctl_io_flags; 118 119 120struct ctl_lba_len { 121 uint64_t lba; 122 uint32_t len; 123}; 124 125struct ctl_lba_len_flags { 126 uint64_t lba; 127 uint32_t len; 128 uint32_t flags; 129#define CTL_LLF_FUA 0x04000000 130#define CTL_LLF_DPO 0x08000000 131#define CTL_LLF_READ 0x10000000 132#define CTL_LLF_WRITE 0x20000000 133#define CTL_LLF_VERIFY 0x40000000 134#define CTL_LLF_COMPARE 0x80000000 135}; 136 137struct ctl_ptr_len_flags { 138 uint8_t *ptr; 139 uint32_t len; 140 uint32_t flags; 141}; 142 143union ctl_priv { 144 uint8_t bytes[sizeof(uint64_t) * 2]; 145 uint64_t integer; 146 uint64_t integers[2]; 147 void *ptr; 148 void *ptrs[2]; 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_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[0]) 168#define CTL_SOFTC(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[1]) 169#define CTL_BACKEND_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND_LUN].ptrs[0]) 170#define CTL_PORT(io) (((struct ctl_softc *)CTL_SOFTC(io))-> \ 171 ctl_ports[(io)->io_hdr.nexus.targ_port]) 172 173/* 174 * These are used only on Originating SC in XFER mode, where requests don't 175 * ever reach backends, so we can reuse backend's private storage. 176 */ 177#define CTL_RSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[0]) 178#define CTL_LSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[1]) 179#define CTL_RSGLT(io) ((struct ctl_sg_entry *)CTL_RSGL(io)) 180#define CTL_LSGLT(io) ((struct ctl_sg_entry *)CTL_LSGL(io)) 181 182#define CTL_INVALID_PORTNAME 0xFF 183#define CTL_UNMAPPED_IID 0xFF 184 185struct ctl_sg_entry { 186 void *addr; 187 size_t len; 188}; 189 190typedef enum { 191 CTL_IO_NONE, 192 CTL_IO_SCSI, 193 CTL_IO_TASK, 194} ctl_io_type; 195 196struct ctl_nexus { 197 uint32_t initid; /* Initiator ID */ 198 uint32_t targ_port; /* Target port, filled in by PORT */ 199 uint32_t targ_lun; /* Destination lun */ 200 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */ 201}; 202 203typedef enum { 204 CTL_MSG_SERIALIZE, 205 CTL_MSG_R2R, 206 CTL_MSG_FINISH_IO, 207 CTL_MSG_BAD_JUJU, 208 CTL_MSG_MANAGE_TASKS, 209 CTL_MSG_PERS_ACTION, 210 CTL_MSG_DATAMOVE, 211 CTL_MSG_DATAMOVE_DONE, 212 CTL_MSG_UA, /* Set/clear UA on secondary. */ 213 CTL_MSG_PORT_SYNC, /* Information about port. */ 214 CTL_MSG_LUN_SYNC, /* Information about LUN. */ 215 CTL_MSG_IID_SYNC, /* Information about initiator. */ 216 CTL_MSG_LOGIN, /* Information about HA peer. */ 217 CTL_MSG_MODE_SYNC, /* Mode page current content. */ 218 CTL_MSG_FAILOVER /* Fake, never sent though the wire */ 219} ctl_msg_type; 220 221struct ctl_scsiio; 222 223struct ctl_io_hdr { 224 uint32_t version; /* interface version XXX */ 225 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */ 226 ctl_msg_type msg_type; 227 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 228 uint32_t iid_indx; /* the index into the iid mapping */ 229 uint32_t flags; /* transaction flags */ 230 uint32_t status; /* transaction status */ 231 uint32_t port_status; /* trans status, set by PORT, 0 = good*/ 232 uint32_t timeout; /* timeout in ms */ 233 uint32_t retries; /* retry count */ 234#ifdef CTL_IO_DELAY 235 struct callout delay_callout; 236#endif /* CTL_IO_DELAY */ 237#ifdef CTL_TIME_IO 238 time_t start_time; /* I/O start time */ 239 struct bintime start_bt; /* Timer start ticks */ 240 struct bintime dma_start_bt; /* DMA start ticks */ 241 struct bintime dma_bt; /* DMA total ticks */ 242#endif /* CTL_TIME_IO */ 243 uint32_t num_dmas; /* Number of DMAs */ 244 union ctl_io *remote_io; /* I/O counterpart on remote HA side */ 245 union ctl_io *blocker; /* I/O blocking this one */ 246 void *pool; /* I/O pool */ 247 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 248 TAILQ_HEAD(, ctl_io_hdr) blocked_queue; /* I/Os blocked by this one */ 249 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 250 LIST_ENTRY(ctl_io_hdr) ooa_links; /* ooa_queue links */ 251 TAILQ_ENTRY(ctl_io_hdr) blocked_links; /* blocked_queue links */ 252}; 253 254typedef enum { 255 CTL_TAG_UNTAGGED, 256 CTL_TAG_SIMPLE, 257 CTL_TAG_ORDERED, 258 CTL_TAG_HEAD_OF_QUEUE, 259 CTL_TAG_ACA 260} ctl_tag_type; 261 262union ctl_io; 263 264/* 265 * SCSI passthrough I/O structure for the CAM Target Layer. Note 266 * that some of these fields are here for completeness, but they aren't 267 * used in the CTL implementation. e.g., timeout and retries won't be 268 * used. 269 * 270 * Note: Make sure the io_hdr is *always* the first element in this 271 * structure. 272 */ 273struct ctl_scsiio { 274 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 275 276 /* 277 * The ext_* fields are generally intended for frontend use; CTL itself 278 * doesn't modify or use them. 279 */ 280 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 281 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 282 uint32_t ext_data_len; /* Data transfer length */ 283 uint32_t ext_data_filled; /* Amount of data filled so far */ 284 285 /* 286 * The number of scatter/gather entries in the list pointed to 287 * by kern_data_ptr. 0 means there is no list, just a data pointer. 288 */ 289 uint32_t kern_sg_entries; 290 291 uint32_t rem_sg_entries; /* Unused. */ 292 293 /* 294 * The data pointer or a pointer to the scatter/gather list. 295 */ 296 uint8_t *kern_data_ptr; 297 298 /* 299 * Length of the data buffer or scatter/gather list. It's also 300 * the length of this particular piece of the data transfer, 301 * ie. number of bytes expected to be transferred by the current 302 * invocation of frontend's datamove() callback. It's always 303 * less than or equal to kern_total_len. 304 */ 305 uint32_t kern_data_len; 306 307 /* 308 * Total length of data to be transferred during this particular 309 * SCSI command, as decoded from SCSI CDB. 310 */ 311 uint32_t kern_total_len; 312 313 /* 314 * Amount of data left after the current data transfer. 315 */ 316 uint32_t kern_data_resid; 317 318 /* 319 * Byte offset of this transfer, equal to the amount of data 320 * already transferred for this SCSI command during previous 321 * datamove() invocations. 322 */ 323 uint32_t kern_rel_offset; 324 325 struct scsi_sense_data sense_data; /* sense data */ 326 uint8_t sense_len; /* Returned sense length */ 327 uint8_t scsi_status; /* SCSI status byte */ 328 uint8_t seridx; /* Serialization index. */ 329 uint8_t priority; /* Command priority */ 330 uint32_t residual; /* Unused */ 331 uint32_t tag_num; /* tag number */ 332 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 333 uint8_t cdb_len; /* CDB length */ 334 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 335 int (*be_move_done)(union ctl_io *io, bool samethr); /* called by fe */ 336 int (*io_cont)(union ctl_io *io); /* to continue processing */ 337}; 338 339typedef enum { 340 CTL_TASK_ABORT_TASK, 341 CTL_TASK_ABORT_TASK_SET, 342 CTL_TASK_CLEAR_ACA, 343 CTL_TASK_CLEAR_TASK_SET, 344 CTL_TASK_I_T_NEXUS_RESET, 345 CTL_TASK_LUN_RESET, 346 CTL_TASK_TARGET_RESET, 347 CTL_TASK_BUS_RESET, 348 CTL_TASK_PORT_LOGIN, 349 CTL_TASK_PORT_LOGOUT, 350 CTL_TASK_QUERY_TASK, 351 CTL_TASK_QUERY_TASK_SET, 352 CTL_TASK_QUERY_ASYNC_EVENT 353} ctl_task_type; 354 355typedef enum { 356 CTL_TASK_FUNCTION_COMPLETE, 357 CTL_TASK_FUNCTION_SUCCEEDED, 358 CTL_TASK_FUNCTION_REJECTED, 359 CTL_TASK_LUN_DOES_NOT_EXIST, 360 CTL_TASK_FUNCTION_NOT_SUPPORTED 361} ctl_task_status; 362 363/* 364 * Task management I/O structure. Aborts, bus resets, etc., are sent using 365 * this structure. 366 * 367 * Note: Make sure the io_hdr is *always* the first element in this 368 * structure. 369 */ 370struct ctl_taskio { 371 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 372 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 373 uint32_t tag_num; /* tag number */ 374 ctl_tag_type tag_type; /* simple, ordered, etc. */ 375 uint8_t task_status; /* Complete, Succeeded, etc. */ 376 uint8_t task_resp[3];/* Response information */ 377}; 378 379 380/* 381 * HA link messages. 382 */ 383#define CTL_HA_VERSION 3 384 385/* 386 * Used for CTL_MSG_LOGIN. 387 */ 388struct ctl_ha_msg_login { 389 ctl_msg_type msg_type; 390 int version; 391 int ha_mode; 392 int ha_id; 393 int max_luns; 394 int max_ports; 395 int max_init_per_port; 396}; 397 398typedef enum { 399 CTL_PR_REG_KEY, 400 CTL_PR_UNREG_KEY, 401 CTL_PR_PREEMPT, 402 CTL_PR_CLEAR, 403 CTL_PR_RESERVE, 404 CTL_PR_RELEASE 405} ctl_pr_action; 406 407/* 408 * The PR info is specifically for sending Persistent Reserve actions 409 * to the other SC which it must also act on. 410 * 411 * Note: Make sure the io_hdr is *always* the first element in this 412 * structure. 413 */ 414struct ctl_pr_info { 415 ctl_pr_action action; 416 uint8_t sa_res_key[8]; 417 uint8_t res_type; 418 uint32_t residx; 419}; 420 421struct ctl_ha_msg_hdr { 422 ctl_msg_type msg_type; 423 uint32_t status; /* transaction status */ 424 union ctl_io *original_sc; 425 union ctl_io *serializing_sc; 426 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 427}; 428 429#define CTL_HA_MAX_SG_ENTRIES 16 430#define CTL_HA_DATAMOVE_SEGMENT 131072 431 432/* 433 * Used for CTL_MSG_PERS_ACTION. 434 */ 435struct ctl_ha_msg_pr { 436 struct ctl_ha_msg_hdr hdr; 437 struct ctl_pr_info pr_info; 438}; 439 440/* 441 * Used for CTL_MSG_UA. 442 */ 443struct ctl_ha_msg_ua { 444 struct ctl_ha_msg_hdr hdr; 445 int ua_all; 446 int ua_set; 447 int ua_type; 448 uint8_t ua_info[8]; 449}; 450 451/* 452 * The S/G handling here is a little different than the standard ctl_scsiio 453 * structure, because we can't pass data by reference in between controllers. 454 * The S/G list in the ctl_scsiio struct is normally passed in the 455 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 456 * even if there is only one entry. 457 * 458 * Used for CTL_MSG_DATAMOVE. 459 */ 460struct ctl_ha_msg_dt { 461 struct ctl_ha_msg_hdr hdr; 462 ctl_io_flags flags; /* Only I/O flags are used here */ 463 uint32_t sg_sequence; /* S/G portion number */ 464 uint8_t sg_last; /* last S/G batch = 1 */ 465 uint32_t sent_sg_entries; /* previous S/G count */ 466 uint32_t cur_sg_entries; /* current S/G entries */ 467 uint32_t kern_sg_entries; /* total S/G entries */ 468 uint32_t kern_data_len; /* Length of this S/G list */ 469 uint32_t kern_total_len; /* Total length of this 470 transaction */ 471 uint32_t kern_data_resid; /* Length left to transfer 472 after this*/ 473 uint32_t kern_rel_offset; /* Byte Offset of this 474 transfer */ 475 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 476}; 477 478/* 479 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU, 480 * and CTL_MSG_DATAMOVE_DONE. 481 */ 482struct ctl_ha_msg_scsi { 483 struct ctl_ha_msg_hdr hdr; 484 uint32_t tag_num; /* tag number */ 485 ctl_tag_type tag_type; /* simple, ordered, etc. */ 486 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 487 uint8_t cdb_len; /* CDB length */ 488 uint8_t scsi_status; /* SCSI status byte */ 489 uint8_t sense_len; /* Returned sense length */ 490 uint8_t priority; /* Command priority */ 491 uint32_t port_status; /* trans status, set by FETD, 492 0 = good*/ 493 uint32_t kern_data_resid; /* for DATAMOVE_DONE */ 494 struct scsi_sense_data sense_data; /* sense data */ 495}; 496 497/* 498 * Used for CTL_MSG_MANAGE_TASKS. 499 */ 500struct ctl_ha_msg_task { 501 struct ctl_ha_msg_hdr hdr; 502 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 503 uint32_t tag_num; /* tag number */ 504 ctl_tag_type tag_type; /* simple, ordered, etc. */ 505}; 506 507/* 508 * Used for CTL_MSG_PORT_SYNC. 509 */ 510struct ctl_ha_msg_port { 511 struct ctl_ha_msg_hdr hdr; 512 int port_type; 513 int physical_port; 514 int virtual_port; 515 int status; 516 int name_len; 517 int lun_map_len; 518 int port_devid_len; 519 int target_devid_len; 520 int init_devid_len; 521 uint8_t data[]; 522}; 523 524/* 525 * Used for CTL_MSG_LUN_SYNC. 526 */ 527struct ctl_ha_msg_lun { 528 struct ctl_ha_msg_hdr hdr; 529 int flags; 530 unsigned int pr_generation; 531 uint32_t pr_res_idx; 532 uint8_t pr_res_type; 533 int lun_devid_len; 534 int pr_key_count; 535 uint8_t data[]; 536}; 537 538struct ctl_ha_msg_lun_pr_key { 539 uint32_t pr_iid; 540 uint64_t pr_key; 541}; 542 543/* 544 * Used for CTL_MSG_IID_SYNC. 545 */ 546struct ctl_ha_msg_iid { 547 struct ctl_ha_msg_hdr hdr; 548 int in_use; 549 int name_len; 550 uint64_t wwpn; 551 uint8_t data[]; 552}; 553 554/* 555 * Used for CTL_MSG_MODE_SYNC. 556 */ 557struct ctl_ha_msg_mode { 558 struct ctl_ha_msg_hdr hdr; 559 uint8_t page_code; 560 uint8_t subpage; 561 uint16_t page_len; 562 uint8_t data[]; 563}; 564 565union ctl_ha_msg { 566 struct ctl_ha_msg_hdr hdr; 567 struct ctl_ha_msg_task task; 568 struct ctl_ha_msg_scsi scsi; 569 struct ctl_ha_msg_dt dt; 570 struct ctl_ha_msg_pr pr; 571 struct ctl_ha_msg_ua ua; 572 struct ctl_ha_msg_port port; 573 struct ctl_ha_msg_lun lun; 574 struct ctl_ha_msg_iid iid; 575 struct ctl_ha_msg_login login; 576 struct ctl_ha_msg_mode mode; 577}; 578 579struct ctl_prio { 580 struct ctl_io_hdr io_hdr; 581 struct ctl_ha_msg_pr pr_msg; 582}; 583 584union ctl_io { 585 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 586 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 587 struct ctl_taskio taskio; /* SCSI task management/reset */ 588 struct ctl_prio presio; /* update per. res info on other SC */ 589}; 590 591#ifdef _KERNEL 592 593union ctl_io *ctl_alloc_io(void *pool_ref); 594union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 595void ctl_free_io(union ctl_io *io); 596void ctl_zero_io(union ctl_io *io); 597 598#endif /* _KERNEL */ 599 600#endif /* _CTL_IO_H_ */ 601 602/* 603 * vim: ts=8 604 */ 605