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 struct ctl_lba_len { 116 uint64_t lba; 117 uint32_t len; 118 }; 119 120 struct ctl_lba_len_flags { 121 uint64_t lba; 122 uint32_t len; 123 uint32_t flags; 124 #define CTL_LLF_FUA 0x04000000 125 #define CTL_LLF_DPO 0x08000000 126 #define CTL_LLF_READ 0x10000000 127 #define CTL_LLF_WRITE 0x20000000 128 #define CTL_LLF_VERIFY 0x40000000 129 #define CTL_LLF_COMPARE 0x80000000 130 }; 131 132 struct ctl_ptr_len_flags { 133 uint8_t *ptr; 134 uint32_t len; 135 uint32_t flags; 136 }; 137 138 union ctl_priv { 139 uint8_t bytes[sizeof(uint64_t) * 2]; 140 uint64_t integer; 141 uint64_t integers[2]; 142 void *ptr; 143 void *ptrs[2]; 144 }; 145 146 /* 147 * Number of CTL private areas. 148 */ 149 #define CTL_NUM_PRIV 6 150 151 /* 152 * Which private area are we using for a particular piece of data? 153 */ 154 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */ 155 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/ 156 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */ 157 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */ 158 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */ 159 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */ 160 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */ 161 162 #define CTL_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[0]) 163 #define CTL_SOFTC(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[1]) 164 #define CTL_BACKEND_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND_LUN].ptrs[0]) 165 #define CTL_PORT(io) (((struct ctl_softc *)CTL_SOFTC(io))-> \ 166 ctl_ports[(io)->io_hdr.nexus.targ_port]) 167 168 /* 169 * These are used only on Originating SC in XFER mode, where requests don't 170 * ever reach backends, so we can reuse backend's private storage. 171 */ 172 #define CTL_RSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[0]) 173 #define CTL_LSGL(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptrs[1]) 174 #define CTL_RSGLT(io) ((struct ctl_sg_entry *)CTL_RSGL(io)) 175 #define CTL_LSGLT(io) ((struct ctl_sg_entry *)CTL_LSGL(io)) 176 177 #define CTL_INVALID_PORTNAME 0xFF 178 #define CTL_UNMAPPED_IID 0xFF 179 180 struct ctl_sg_entry { 181 void *addr; 182 size_t len; 183 }; 184 185 typedef enum { 186 CTL_IO_NONE, 187 CTL_IO_SCSI, 188 CTL_IO_TASK, 189 } ctl_io_type; 190 191 struct ctl_nexus { 192 uint32_t initid; /* Initiator ID */ 193 uint32_t targ_port; /* Target port, filled in by PORT */ 194 uint32_t targ_lun; /* Destination lun */ 195 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */ 196 }; 197 198 typedef enum { 199 CTL_MSG_SERIALIZE, 200 CTL_MSG_R2R, 201 CTL_MSG_FINISH_IO, 202 CTL_MSG_BAD_JUJU, 203 CTL_MSG_MANAGE_TASKS, 204 CTL_MSG_PERS_ACTION, 205 CTL_MSG_DATAMOVE, 206 CTL_MSG_DATAMOVE_DONE, 207 CTL_MSG_UA, /* Set/clear UA on secondary. */ 208 CTL_MSG_PORT_SYNC, /* Information about port. */ 209 CTL_MSG_LUN_SYNC, /* Information about LUN. */ 210 CTL_MSG_IID_SYNC, /* Information about initiator. */ 211 CTL_MSG_LOGIN, /* Information about HA peer. */ 212 CTL_MSG_MODE_SYNC, /* Mode page current content. */ 213 CTL_MSG_FAILOVER /* Fake, never sent though the wire */ 214 } ctl_msg_type; 215 216 struct ctl_scsiio; 217 218 struct ctl_io_hdr { 219 uint32_t version; /* interface version XXX */ 220 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */ 221 ctl_msg_type msg_type; 222 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 223 uint32_t iid_indx; /* the index into the iid mapping */ 224 uint32_t flags; /* transaction flags */ 225 uint32_t status; /* transaction status */ 226 uint32_t port_status; /* trans status, set by PORT, 0 = good*/ 227 uint32_t timeout; /* timeout in ms */ 228 uint32_t retries; /* retry count */ 229 #ifdef CTL_IO_DELAY 230 struct callout delay_callout; 231 #endif /* CTL_IO_DELAY */ 232 #ifdef CTL_TIME_IO 233 time_t start_time; /* I/O start time */ 234 struct bintime start_bt; /* Timer start ticks */ 235 struct bintime dma_start_bt; /* DMA start ticks */ 236 struct bintime dma_bt; /* DMA total ticks */ 237 #endif /* CTL_TIME_IO */ 238 uint32_t num_dmas; /* Number of DMAs */ 239 union ctl_io *remote_io; /* I/O counterpart on remote HA side */ 240 union ctl_io *blocker; /* I/O blocking this one */ 241 void *pool; /* I/O pool */ 242 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 243 TAILQ_HEAD(, ctl_io_hdr) blocked_queue; /* I/Os blocked by this one */ 244 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 245 TAILQ_ENTRY(ctl_io_hdr) ooa_links; /* ooa_queue links */ 246 TAILQ_ENTRY(ctl_io_hdr) blocked_links; /* blocked_queue links */ 247 }; 248 249 typedef enum { 250 CTL_TAG_UNTAGGED, 251 CTL_TAG_SIMPLE, 252 CTL_TAG_ORDERED, 253 CTL_TAG_HEAD_OF_QUEUE, 254 CTL_TAG_ACA 255 } ctl_tag_type; 256 257 union ctl_io; 258 259 typedef void (*ctl_ref)(void *arg, int diff); 260 261 /* 262 * SCSI passthrough I/O structure for the CAM Target Layer. Note 263 * that some of these fields are here for completeness, but they aren't 264 * used in the CTL implementation. e.g., timeout and retries won't be 265 * used. 266 * 267 * Note: Make sure the io_hdr is *always* the first element in this 268 * structure. 269 */ 270 struct ctl_scsiio { 271 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 272 273 /* 274 * The ext_* fields are generally intended for frontend use; CTL itself 275 * doesn't modify or use them. 276 */ 277 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 278 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 279 uint32_t ext_data_len; /* Data transfer length */ 280 uint32_t ext_data_filled; /* Amount of data filled so far */ 281 282 /* 283 * The number of scatter/gather entries in the list pointed to 284 * by kern_data_ptr. 0 means there is no list, just a data pointer. 285 */ 286 uint32_t kern_sg_entries; 287 288 uint32_t rem_sg_entries; /* Unused. */ 289 290 /* 291 * The data pointer or a pointer to the scatter/gather list. 292 */ 293 uint8_t *kern_data_ptr; 294 295 /* 296 * Length of the data buffer or scatter/gather list. It's also 297 * the length of this particular piece of the data transfer, 298 * ie. number of bytes expected to be transferred by the current 299 * invocation of frontend's datamove() callback. It's always 300 * less than or equal to kern_total_len. 301 */ 302 uint32_t kern_data_len; 303 304 /* 305 * Total length of data to be transferred during this particular 306 * SCSI command, as decoded from SCSI CDB. 307 */ 308 uint32_t kern_total_len; 309 310 /* 311 * Amount of data left after the current data transfer. 312 */ 313 uint32_t kern_data_resid; 314 315 /* 316 * Byte offset of this transfer, equal to the amount of data 317 * already transferred for this SCSI command during previous 318 * datamove() invocations. 319 */ 320 uint32_t kern_rel_offset; 321 322 struct scsi_sense_data sense_data; /* sense data */ 323 uint8_t sense_len; /* Returned sense length */ 324 uint8_t scsi_status; /* SCSI status byte */ 325 uint8_t sense_residual; /* Unused. */ 326 uint32_t residual; /* Unused */ 327 uint32_t tag_num; /* tag number */ 328 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 329 uint8_t cdb_len; /* CDB length */ 330 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 331 int (*be_move_done)(union ctl_io *io); /* called by fe */ 332 int (*io_cont)(union ctl_io *io); /* to continue processing */ 333 ctl_ref kern_data_ref; /* Method to reference/release data */ 334 void *kern_data_arg; /* Opaque argument for kern_data_ref() */ 335 }; 336 337 typedef enum { 338 CTL_TASK_ABORT_TASK, 339 CTL_TASK_ABORT_TASK_SET, 340 CTL_TASK_CLEAR_ACA, 341 CTL_TASK_CLEAR_TASK_SET, 342 CTL_TASK_I_T_NEXUS_RESET, 343 CTL_TASK_LUN_RESET, 344 CTL_TASK_TARGET_RESET, 345 CTL_TASK_BUS_RESET, 346 CTL_TASK_PORT_LOGIN, 347 CTL_TASK_PORT_LOGOUT, 348 CTL_TASK_QUERY_TASK, 349 CTL_TASK_QUERY_TASK_SET, 350 CTL_TASK_QUERY_ASYNC_EVENT 351 } ctl_task_type; 352 353 typedef enum { 354 CTL_TASK_FUNCTION_COMPLETE, 355 CTL_TASK_FUNCTION_SUCCEEDED, 356 CTL_TASK_FUNCTION_REJECTED, 357 CTL_TASK_LUN_DOES_NOT_EXIST, 358 CTL_TASK_FUNCTION_NOT_SUPPORTED 359 } ctl_task_status; 360 361 /* 362 * Task management I/O structure. Aborts, bus resets, etc., are sent using 363 * this structure. 364 * 365 * Note: Make sure the io_hdr is *always* the first element in this 366 * structure. 367 */ 368 struct ctl_taskio { 369 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 370 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 371 uint32_t tag_num; /* tag number */ 372 ctl_tag_type tag_type; /* simple, ordered, etc. */ 373 uint8_t task_status; /* Complete, Succeeded, etc. */ 374 uint8_t task_resp[3];/* Response information */ 375 }; 376 377 /* 378 * HA link messages. 379 */ 380 #define CTL_HA_VERSION 3 381 382 /* 383 * Used for CTL_MSG_LOGIN. 384 */ 385 struct ctl_ha_msg_login { 386 ctl_msg_type msg_type; 387 int version; 388 int ha_mode; 389 int ha_id; 390 int max_luns; 391 int max_ports; 392 int max_init_per_port; 393 }; 394 395 typedef enum { 396 CTL_PR_REG_KEY, 397 CTL_PR_UNREG_KEY, 398 CTL_PR_PREEMPT, 399 CTL_PR_CLEAR, 400 CTL_PR_RESERVE, 401 CTL_PR_RELEASE 402 } ctl_pr_action; 403 404 /* 405 * The PR info is specifically for sending Persistent Reserve actions 406 * to the other SC which it must also act on. 407 * 408 * Note: Make sure the io_hdr is *always* the first element in this 409 * structure. 410 */ 411 struct ctl_pr_info { 412 ctl_pr_action action; 413 uint8_t sa_res_key[8]; 414 uint8_t res_type; 415 uint32_t residx; 416 }; 417 418 struct ctl_ha_msg_hdr { 419 ctl_msg_type msg_type; 420 uint32_t status; /* transaction status */ 421 union ctl_io *original_sc; 422 union ctl_io *serializing_sc; 423 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 424 }; 425 426 #define CTL_HA_MAX_SG_ENTRIES 16 427 #define CTL_HA_DATAMOVE_SEGMENT 131072 428 429 /* 430 * Used for CTL_MSG_PERS_ACTION. 431 */ 432 struct ctl_ha_msg_pr { 433 struct ctl_ha_msg_hdr hdr; 434 struct ctl_pr_info pr_info; 435 }; 436 437 /* 438 * Used for CTL_MSG_UA. 439 */ 440 struct ctl_ha_msg_ua { 441 struct ctl_ha_msg_hdr hdr; 442 int ua_all; 443 int ua_set; 444 int ua_type; 445 uint8_t ua_info[8]; 446 }; 447 448 /* 449 * The S/G handling here is a little different than the standard ctl_scsiio 450 * structure, because we can't pass data by reference in between controllers. 451 * The S/G list in the ctl_scsiio struct is normally passed in the 452 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 453 * even if there is only one entry. 454 * 455 * Used for CTL_MSG_DATAMOVE. 456 */ 457 struct ctl_ha_msg_dt { 458 struct ctl_ha_msg_hdr hdr; 459 ctl_io_flags flags; /* Only I/O flags are used here */ 460 uint32_t sg_sequence; /* S/G portion number */ 461 uint8_t sg_last; /* last S/G batch = 1 */ 462 uint32_t sent_sg_entries; /* previous S/G count */ 463 uint32_t cur_sg_entries; /* current S/G entries */ 464 uint32_t kern_sg_entries; /* total S/G entries */ 465 uint32_t kern_data_len; /* Length of this S/G list */ 466 uint32_t kern_total_len; /* Total length of this 467 transaction */ 468 uint32_t kern_data_resid; /* Length left to transfer 469 after this*/ 470 uint32_t kern_rel_offset; /* Byte Offset of this 471 transfer */ 472 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 473 }; 474 475 /* 476 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU, 477 * and CTL_MSG_DATAMOVE_DONE. 478 */ 479 struct ctl_ha_msg_scsi { 480 struct ctl_ha_msg_hdr hdr; 481 uint32_t tag_num; /* tag number */ 482 ctl_tag_type tag_type; /* simple, ordered, etc. */ 483 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 484 uint8_t cdb_len; /* CDB length */ 485 uint8_t scsi_status; /* SCSI status byte */ 486 uint8_t sense_len; /* Returned sense length */ 487 uint32_t port_status; /* trans status, set by FETD, 488 0 = good*/ 489 uint32_t kern_data_resid; /* for DATAMOVE_DONE */ 490 struct scsi_sense_data sense_data; /* sense data */ 491 }; 492 493 /* 494 * Used for CTL_MSG_MANAGE_TASKS. 495 */ 496 struct ctl_ha_msg_task { 497 struct ctl_ha_msg_hdr hdr; 498 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 499 uint32_t tag_num; /* tag number */ 500 ctl_tag_type tag_type; /* simple, ordered, etc. */ 501 }; 502 503 /* 504 * Used for CTL_MSG_PORT_SYNC. 505 */ 506 struct ctl_ha_msg_port { 507 struct ctl_ha_msg_hdr hdr; 508 int port_type; 509 int physical_port; 510 int virtual_port; 511 int status; 512 int name_len; 513 int lun_map_len; 514 int port_devid_len; 515 int target_devid_len; 516 int init_devid_len; 517 uint8_t data[]; 518 }; 519 520 /* 521 * Used for CTL_MSG_LUN_SYNC. 522 */ 523 struct ctl_ha_msg_lun { 524 struct ctl_ha_msg_hdr hdr; 525 int flags; 526 unsigned int pr_generation; 527 uint32_t pr_res_idx; 528 uint8_t pr_res_type; 529 int lun_devid_len; 530 int pr_key_count; 531 uint8_t data[]; 532 }; 533 534 struct ctl_ha_msg_lun_pr_key { 535 uint32_t pr_iid; 536 uint64_t pr_key; 537 }; 538 539 /* 540 * Used for CTL_MSG_IID_SYNC. 541 */ 542 struct ctl_ha_msg_iid { 543 struct ctl_ha_msg_hdr hdr; 544 int in_use; 545 int name_len; 546 uint64_t wwpn; 547 uint8_t data[]; 548 }; 549 550 /* 551 * Used for CTL_MSG_MODE_SYNC. 552 */ 553 struct ctl_ha_msg_mode { 554 struct ctl_ha_msg_hdr hdr; 555 uint8_t page_code; 556 uint8_t subpage; 557 uint16_t page_len; 558 uint8_t data[]; 559 }; 560 561 union ctl_ha_msg { 562 struct ctl_ha_msg_hdr hdr; 563 struct ctl_ha_msg_task task; 564 struct ctl_ha_msg_scsi scsi; 565 struct ctl_ha_msg_dt dt; 566 struct ctl_ha_msg_pr pr; 567 struct ctl_ha_msg_ua ua; 568 struct ctl_ha_msg_port port; 569 struct ctl_ha_msg_lun lun; 570 struct ctl_ha_msg_iid iid; 571 struct ctl_ha_msg_login login; 572 struct ctl_ha_msg_mode mode; 573 }; 574 575 struct ctl_prio { 576 struct ctl_io_hdr io_hdr; 577 struct ctl_ha_msg_pr pr_msg; 578 }; 579 580 union ctl_io { 581 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 582 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 583 struct ctl_taskio taskio; /* SCSI task management/reset */ 584 struct ctl_prio presio; /* update per. res info on other SC */ 585 }; 586 587 #ifdef _KERNEL 588 589 union ctl_io *ctl_alloc_io(void *pool_ref); 590 union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 591 void ctl_free_io(union ctl_io *io); 592 void ctl_zero_io(union ctl_io *io); 593 594 #endif /* _KERNEL */ 595 596 #endif /* _CTL_IO_H_ */ 597 598 /* 599 * vim: ts=8 600 */ 601