1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 68 typedef 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 */ 85 typedef 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_USER_TAG = 0x00000020, /* userland provides tag */ 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 struct ctl_lba_len { 120 uint64_t lba; 121 uint32_t len; 122 }; 123 124 struct ctl_lba_len_flags { 125 uint64_t lba; 126 uint32_t len; 127 uint32_t flags; 128 #define CTL_LLF_FUA 0x04000000 129 #define CTL_LLF_DPO 0x08000000 130 #define CTL_LLF_READ 0x10000000 131 #define CTL_LLF_WRITE 0x20000000 132 #define CTL_LLF_VERIFY 0x40000000 133 #define CTL_LLF_COMPARE 0x80000000 134 }; 135 136 struct ctl_ptr_len_flags { 137 uint8_t *ptr; 138 uint32_t len; 139 uint32_t flags; 140 }; 141 142 union ctl_priv { 143 uint8_t bytes[sizeof(uint64_t) * 2]; 144 uint64_t integer; 145 uint64_t integers[2]; 146 void *ptr; 147 void *ptrs[2]; 148 }; 149 150 /* 151 * Number of CTL private areas. 152 */ 153 #define CTL_NUM_PRIV 6 154 155 /* 156 * Which private area are we using for a particular piece of data? 157 */ 158 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */ 159 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/ 160 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */ 161 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */ 162 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */ 163 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */ 164 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */ 165 166 #define CTL_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[0]) 167 #define CTL_SOFTC(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[1]) 168 #define CTL_BACKEND_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND_LUN].ptrs[0]) 169 #define CTL_PORT(io) (((struct ctl_softc *)CTL_SOFTC(io))-> \ 170 ctl_ports[(io)->io_hdr.nexus.targ_port]) 171 172 /* 173 * These are used only on Originating SC in XFER mode, where requests don't 174 * ever reach backends, so we can reuse backend's private storage. 175 */ 176 #define CTL_RSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[0]) 177 #define CTL_LSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[1]) 178 #define CTL_RSGLT(io) ((struct ctl_sg_entry *)CTL_RSGL(io)) 179 #define CTL_LSGLT(io) ((struct ctl_sg_entry *)CTL_LSGL(io)) 180 181 #define CTL_INVALID_PORTNAME 0xFF 182 #define CTL_UNMAPPED_IID 0xFF 183 184 struct ctl_sg_entry { 185 void *addr; 186 size_t len; 187 }; 188 189 typedef enum { 190 CTL_IO_NONE, 191 CTL_IO_SCSI, 192 CTL_IO_TASK, 193 } ctl_io_type; 194 195 struct ctl_nexus { 196 uint32_t initid; /* Initiator ID */ 197 uint32_t targ_port; /* Target port, filled in by PORT */ 198 uint32_t targ_lun; /* Destination lun */ 199 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */ 200 }; 201 202 typedef enum { 203 CTL_MSG_SERIALIZE, 204 CTL_MSG_R2R, 205 CTL_MSG_FINISH_IO, 206 CTL_MSG_BAD_JUJU, 207 CTL_MSG_MANAGE_TASKS, 208 CTL_MSG_PERS_ACTION, 209 CTL_MSG_DATAMOVE, 210 CTL_MSG_DATAMOVE_DONE, 211 CTL_MSG_UA, /* Set/clear UA on secondary. */ 212 CTL_MSG_PORT_SYNC, /* Information about port. */ 213 CTL_MSG_LUN_SYNC, /* Information about LUN. */ 214 CTL_MSG_IID_SYNC, /* Information about initiator. */ 215 CTL_MSG_LOGIN, /* Information about HA peer. */ 216 CTL_MSG_MODE_SYNC, /* Mode page current content. */ 217 CTL_MSG_FAILOVER /* Fake, never sent though the wire */ 218 } ctl_msg_type; 219 220 struct ctl_scsiio; 221 222 struct ctl_io_hdr { 223 uint32_t version; /* interface version XXX */ 224 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */ 225 ctl_msg_type msg_type; 226 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 227 uint32_t iid_indx; /* the index into the iid mapping */ 228 uint32_t flags; /* transaction flags */ 229 uint32_t status; /* transaction status */ 230 uint32_t port_status; /* trans status, set by PORT, 0 = good*/ 231 uint32_t timeout; /* timeout in ms */ 232 uint32_t retries; /* retry count */ 233 #ifdef CTL_IO_DELAY 234 struct callout delay_callout; 235 #endif /* CTL_IO_DELAY */ 236 #ifdef CTL_TIME_IO 237 time_t start_time; /* I/O start time */ 238 struct bintime start_bt; /* Timer start ticks */ 239 struct bintime dma_start_bt; /* DMA start ticks */ 240 struct bintime dma_bt; /* DMA total ticks */ 241 #endif /* CTL_TIME_IO */ 242 uint32_t num_dmas; /* Number of DMAs */ 243 union ctl_io *remote_io; /* I/O counterpart on remote HA side */ 244 union ctl_io *blocker; /* I/O blocking this one */ 245 void *pool; /* I/O pool */ 246 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 247 TAILQ_HEAD(, ctl_io_hdr) blocked_queue; /* I/Os blocked by this one */ 248 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 249 LIST_ENTRY(ctl_io_hdr) ooa_links; /* ooa_queue links */ 250 TAILQ_ENTRY(ctl_io_hdr) blocked_links; /* blocked_queue links */ 251 }; 252 253 typedef enum { 254 CTL_TAG_UNTAGGED, 255 CTL_TAG_SIMPLE, 256 CTL_TAG_ORDERED, 257 CTL_TAG_HEAD_OF_QUEUE, 258 CTL_TAG_ACA 259 } ctl_tag_type; 260 261 union ctl_io; 262 263 typedef void (*ctl_ref)(void *arg, int diff); 264 265 /* 266 * SCSI passthrough I/O structure for the CAM Target Layer. Note 267 * that some of these fields are here for completeness, but they aren't 268 * used in the CTL implementation. e.g., timeout and retries won't be 269 * used. 270 * 271 * Note: Make sure the io_hdr is *always* the first element in this 272 * structure. 273 */ 274 struct ctl_scsiio { 275 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 276 277 /* 278 * The ext_* fields are generally intended for frontend use; CTL itself 279 * doesn't modify or use them. 280 */ 281 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 282 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 283 uint32_t ext_data_len; /* Data transfer length */ 284 uint32_t ext_data_filled; /* Amount of data filled so far */ 285 286 /* 287 * The number of scatter/gather entries in the list pointed to 288 * by kern_data_ptr. 0 means there is no list, just a data pointer. 289 */ 290 uint32_t kern_sg_entries; 291 292 uint32_t rem_sg_entries; /* Unused. */ 293 294 /* 295 * The data pointer or a pointer to the scatter/gather list. 296 */ 297 uint8_t *kern_data_ptr; 298 299 /* 300 * Length of the data buffer or scatter/gather list. It's also 301 * the length of this particular piece of the data transfer, 302 * ie. number of bytes expected to be transferred by the current 303 * invocation of frontend's datamove() callback. It's always 304 * less than or equal to kern_total_len. 305 */ 306 uint32_t kern_data_len; 307 308 /* 309 * Total length of data to be transferred during this particular 310 * SCSI command, as decoded from SCSI CDB. 311 */ 312 uint32_t kern_total_len; 313 314 /* 315 * Amount of data left after the current data transfer. 316 */ 317 uint32_t kern_data_resid; 318 319 /* 320 * Byte offset of this transfer, equal to the amount of data 321 * already transferred for this SCSI command during previous 322 * datamove() invocations. 323 */ 324 uint32_t kern_rel_offset; 325 326 struct scsi_sense_data sense_data; /* sense data */ 327 uint8_t sense_len; /* Returned sense length */ 328 uint8_t scsi_status; /* SCSI status byte */ 329 uint8_t seridx; /* Serialization index. */ 330 uint8_t priority; /* Command priority */ 331 uint64_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 ctl_ref kern_data_ref; /* Method to reference/release data */ 338 void *kern_data_arg; /* Opaque argument for kern_data_ref() */ 339 }; 340 341 typedef enum { 342 CTL_TASK_ABORT_TASK, 343 CTL_TASK_ABORT_TASK_SET, 344 CTL_TASK_CLEAR_ACA, 345 CTL_TASK_CLEAR_TASK_SET, 346 CTL_TASK_I_T_NEXUS_RESET, 347 CTL_TASK_LUN_RESET, 348 CTL_TASK_TARGET_RESET, 349 CTL_TASK_BUS_RESET, 350 CTL_TASK_PORT_LOGIN, 351 CTL_TASK_PORT_LOGOUT, 352 CTL_TASK_QUERY_TASK, 353 CTL_TASK_QUERY_TASK_SET, 354 CTL_TASK_QUERY_ASYNC_EVENT 355 } ctl_task_type; 356 357 typedef enum { 358 CTL_TASK_FUNCTION_COMPLETE, 359 CTL_TASK_FUNCTION_SUCCEEDED, 360 CTL_TASK_FUNCTION_REJECTED, 361 CTL_TASK_LUN_DOES_NOT_EXIST, 362 CTL_TASK_FUNCTION_NOT_SUPPORTED 363 } ctl_task_status; 364 365 /* 366 * Task management I/O structure. Aborts, bus resets, etc., are sent using 367 * this structure. 368 * 369 * Note: Make sure the io_hdr is *always* the first element in this 370 * structure. 371 */ 372 struct ctl_taskio { 373 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 374 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 375 uint64_t tag_num; /* tag number */ 376 ctl_tag_type tag_type; /* simple, ordered, etc. */ 377 uint8_t task_status; /* Complete, Succeeded, etc. */ 378 uint8_t task_resp[3];/* Response information */ 379 }; 380 381 /* 382 * HA link messages. 383 */ 384 #define CTL_HA_VERSION 4 385 386 /* 387 * Used for CTL_MSG_LOGIN. 388 */ 389 struct ctl_ha_msg_login { 390 ctl_msg_type msg_type; 391 int version; 392 int ha_mode; 393 int ha_id; 394 int max_luns; 395 int max_ports; 396 int max_init_per_port; 397 }; 398 399 typedef enum { 400 CTL_PR_REG_KEY, 401 CTL_PR_UNREG_KEY, 402 CTL_PR_PREEMPT, 403 CTL_PR_CLEAR, 404 CTL_PR_RESERVE, 405 CTL_PR_RELEASE 406 } ctl_pr_action; 407 408 /* 409 * The PR info is specifically for sending Persistent Reserve actions 410 * to the other SC which it must also act on. 411 * 412 * Note: Make sure the io_hdr is *always* the first element in this 413 * structure. 414 */ 415 struct ctl_pr_info { 416 ctl_pr_action action; 417 uint8_t sa_res_key[8]; 418 uint8_t res_type; 419 uint32_t residx; 420 }; 421 422 struct ctl_ha_msg_hdr { 423 ctl_msg_type msg_type; 424 uint32_t status; /* transaction status */ 425 union ctl_io *original_sc; 426 union ctl_io *serializing_sc; 427 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 428 }; 429 430 #define CTL_HA_MAX_SG_ENTRIES 16 431 #define CTL_HA_DATAMOVE_SEGMENT 131072 432 433 /* 434 * Used for CTL_MSG_PERS_ACTION. 435 */ 436 struct ctl_ha_msg_pr { 437 struct ctl_ha_msg_hdr hdr; 438 struct ctl_pr_info pr_info; 439 }; 440 441 /* 442 * Used for CTL_MSG_UA. 443 */ 444 struct ctl_ha_msg_ua { 445 struct ctl_ha_msg_hdr hdr; 446 int ua_all; 447 int ua_set; 448 int ua_type; 449 uint8_t ua_info[8]; 450 }; 451 452 /* 453 * The S/G handling here is a little different than the standard ctl_scsiio 454 * structure, because we can't pass data by reference in between controllers. 455 * The S/G list in the ctl_scsiio struct is normally passed in the 456 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 457 * even if there is only one entry. 458 * 459 * Used for CTL_MSG_DATAMOVE. 460 */ 461 struct ctl_ha_msg_dt { 462 struct ctl_ha_msg_hdr hdr; 463 ctl_io_flags flags; /* Only I/O flags are used here */ 464 uint32_t sg_sequence; /* S/G portion number */ 465 uint8_t sg_last; /* last S/G batch = 1 */ 466 uint32_t sent_sg_entries; /* previous S/G count */ 467 uint32_t cur_sg_entries; /* current S/G entries */ 468 uint32_t kern_sg_entries; /* total S/G entries */ 469 uint32_t kern_data_len; /* Length of this S/G list */ 470 uint32_t kern_total_len; /* Total length of this 471 transaction */ 472 uint32_t kern_data_resid; /* Length left to transfer 473 after this*/ 474 uint32_t kern_rel_offset; /* Byte Offset of this 475 transfer */ 476 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 477 }; 478 479 /* 480 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU, 481 * and CTL_MSG_DATAMOVE_DONE. 482 */ 483 struct ctl_ha_msg_scsi { 484 struct ctl_ha_msg_hdr hdr; 485 uint64_t tag_num; /* tag number */ 486 ctl_tag_type tag_type; /* simple, ordered, etc. */ 487 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 488 uint8_t cdb_len; /* CDB length */ 489 uint8_t scsi_status; /* SCSI status byte */ 490 uint8_t sense_len; /* Returned sense length */ 491 uint8_t priority; /* Command priority */ 492 uint32_t port_status; /* trans status, set by FETD, 493 0 = good*/ 494 uint32_t kern_data_resid; /* for DATAMOVE_DONE */ 495 struct scsi_sense_data sense_data; /* sense data */ 496 }; 497 498 /* 499 * Used for CTL_MSG_MANAGE_TASKS. 500 */ 501 struct ctl_ha_msg_task { 502 struct ctl_ha_msg_hdr hdr; 503 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 504 uint64_t tag_num; /* tag number */ 505 ctl_tag_type tag_type; /* simple, ordered, etc. */ 506 }; 507 508 /* 509 * Used for CTL_MSG_PORT_SYNC. 510 */ 511 struct ctl_ha_msg_port { 512 struct ctl_ha_msg_hdr hdr; 513 int port_type; 514 int physical_port; 515 int virtual_port; 516 int status; 517 int name_len; 518 int lun_map_len; 519 int port_devid_len; 520 int target_devid_len; 521 int init_devid_len; 522 uint8_t data[]; 523 }; 524 525 /* 526 * Used for CTL_MSG_LUN_SYNC. 527 */ 528 struct ctl_ha_msg_lun { 529 struct ctl_ha_msg_hdr hdr; 530 int flags; 531 unsigned int pr_generation; 532 uint32_t pr_res_idx; 533 uint8_t pr_res_type; 534 int lun_devid_len; 535 int pr_key_count; 536 uint8_t data[]; 537 }; 538 539 struct ctl_ha_msg_lun_pr_key { 540 uint32_t pr_iid; 541 uint64_t pr_key; 542 }; 543 544 /* 545 * Used for CTL_MSG_IID_SYNC. 546 */ 547 struct ctl_ha_msg_iid { 548 struct ctl_ha_msg_hdr hdr; 549 int in_use; 550 int name_len; 551 uint64_t wwpn; 552 uint8_t data[]; 553 }; 554 555 /* 556 * Used for CTL_MSG_MODE_SYNC. 557 */ 558 struct ctl_ha_msg_mode { 559 struct ctl_ha_msg_hdr hdr; 560 uint8_t page_code; 561 uint8_t subpage; 562 uint16_t page_len; 563 uint8_t data[]; 564 }; 565 566 union ctl_ha_msg { 567 struct ctl_ha_msg_hdr hdr; 568 struct ctl_ha_msg_task task; 569 struct ctl_ha_msg_scsi scsi; 570 struct ctl_ha_msg_dt dt; 571 struct ctl_ha_msg_pr pr; 572 struct ctl_ha_msg_ua ua; 573 struct ctl_ha_msg_port port; 574 struct ctl_ha_msg_lun lun; 575 struct ctl_ha_msg_iid iid; 576 struct ctl_ha_msg_login login; 577 struct ctl_ha_msg_mode mode; 578 }; 579 580 struct ctl_prio { 581 struct ctl_io_hdr io_hdr; 582 struct ctl_ha_msg_pr pr_msg; 583 }; 584 585 union ctl_io { 586 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 587 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 588 struct ctl_taskio taskio; /* SCSI task management/reset */ 589 struct ctl_prio presio; /* update per. res info on other SC */ 590 }; 591 592 #ifdef _KERNEL 593 594 union ctl_io *ctl_alloc_io(void *pool_ref); 595 union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 596 void ctl_free_io(union ctl_io *io); 597 void ctl_zero_io(union ctl_io *io); 598 599 #endif /* _KERNEL */ 600 601 #endif /* _CTL_IO_H_ */ 602 603 /* 604 * vim: ts=8 605 */ 606