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 /* 261 * SCSI passthrough I/O structure for the CAM Target Layer. Note 262 * that some of these fields are here for completeness, but they aren't 263 * used in the CTL implementation. e.g., timeout and retries won't be 264 * used. 265 * 266 * Note: Make sure the io_hdr is *always* the first element in this 267 * structure. 268 */ 269 struct ctl_scsiio { 270 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 271 272 /* 273 * The ext_* fields are generally intended for frontend use; CTL itself 274 * doesn't modify or use them. 275 */ 276 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 277 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 278 uint32_t ext_data_len; /* Data transfer length */ 279 uint32_t ext_data_filled; /* Amount of data filled so far */ 280 281 /* 282 * The number of scatter/gather entries in the list pointed to 283 * by kern_data_ptr. 0 means there is no list, just a data pointer. 284 */ 285 uint32_t kern_sg_entries; 286 287 uint32_t rem_sg_entries; /* Unused. */ 288 289 /* 290 * The data pointer or a pointer to the scatter/gather list. 291 */ 292 uint8_t *kern_data_ptr; 293 294 /* 295 * Length of the data buffer or scatter/gather list. It's also 296 * the length of this particular piece of the data transfer, 297 * ie. number of bytes expected to be transferred by the current 298 * invocation of frontend's datamove() callback. It's always 299 * less than or equal to kern_total_len. 300 */ 301 uint32_t kern_data_len; 302 303 /* 304 * Total length of data to be transferred during this particular 305 * SCSI command, as decoded from SCSI CDB. 306 */ 307 uint32_t kern_total_len; 308 309 /* 310 * Amount of data left after the current data transfer. 311 */ 312 uint32_t kern_data_resid; 313 314 /* 315 * Byte offset of this transfer, equal to the amount of data 316 * already transferred for this SCSI command during previous 317 * datamove() invocations. 318 */ 319 uint32_t kern_rel_offset; 320 321 struct scsi_sense_data sense_data; /* sense data */ 322 uint8_t sense_len; /* Returned sense length */ 323 uint8_t scsi_status; /* SCSI status byte */ 324 uint8_t sense_residual; /* Unused. */ 325 uint32_t residual; /* Unused */ 326 uint32_t tag_num; /* tag number */ 327 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 328 uint8_t cdb_len; /* CDB length */ 329 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 330 int (*be_move_done)(union ctl_io *io); /* called by fe */ 331 int (*io_cont)(union ctl_io *io); /* to continue processing */ 332 }; 333 334 typedef enum { 335 CTL_TASK_ABORT_TASK, 336 CTL_TASK_ABORT_TASK_SET, 337 CTL_TASK_CLEAR_ACA, 338 CTL_TASK_CLEAR_TASK_SET, 339 CTL_TASK_I_T_NEXUS_RESET, 340 CTL_TASK_LUN_RESET, 341 CTL_TASK_TARGET_RESET, 342 CTL_TASK_BUS_RESET, 343 CTL_TASK_PORT_LOGIN, 344 CTL_TASK_PORT_LOGOUT, 345 CTL_TASK_QUERY_TASK, 346 CTL_TASK_QUERY_TASK_SET, 347 CTL_TASK_QUERY_ASYNC_EVENT 348 } ctl_task_type; 349 350 typedef enum { 351 CTL_TASK_FUNCTION_COMPLETE, 352 CTL_TASK_FUNCTION_SUCCEEDED, 353 CTL_TASK_FUNCTION_REJECTED, 354 CTL_TASK_LUN_DOES_NOT_EXIST, 355 CTL_TASK_FUNCTION_NOT_SUPPORTED 356 } ctl_task_status; 357 358 /* 359 * Task management I/O structure. Aborts, bus resets, etc., are sent using 360 * this structure. 361 * 362 * Note: Make sure the io_hdr is *always* the first element in this 363 * structure. 364 */ 365 struct ctl_taskio { 366 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 367 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 368 uint32_t tag_num; /* tag number */ 369 ctl_tag_type tag_type; /* simple, ordered, etc. */ 370 uint8_t task_status; /* Complete, Succeeded, etc. */ 371 uint8_t task_resp[3];/* Response information */ 372 }; 373 374 375 /* 376 * HA link messages. 377 */ 378 #define CTL_HA_VERSION 3 379 380 /* 381 * Used for CTL_MSG_LOGIN. 382 */ 383 struct ctl_ha_msg_login { 384 ctl_msg_type msg_type; 385 int version; 386 int ha_mode; 387 int ha_id; 388 int max_luns; 389 int max_ports; 390 int max_init_per_port; 391 }; 392 393 typedef enum { 394 CTL_PR_REG_KEY, 395 CTL_PR_UNREG_KEY, 396 CTL_PR_PREEMPT, 397 CTL_PR_CLEAR, 398 CTL_PR_RESERVE, 399 CTL_PR_RELEASE 400 } ctl_pr_action; 401 402 /* 403 * The PR info is specifically for sending Persistent Reserve actions 404 * to the other SC which it must also act on. 405 * 406 * Note: Make sure the io_hdr is *always* the first element in this 407 * structure. 408 */ 409 struct ctl_pr_info { 410 ctl_pr_action action; 411 uint8_t sa_res_key[8]; 412 uint8_t res_type; 413 uint32_t residx; 414 }; 415 416 struct ctl_ha_msg_hdr { 417 ctl_msg_type msg_type; 418 uint32_t status; /* transaction status */ 419 union ctl_io *original_sc; 420 union ctl_io *serializing_sc; 421 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 422 }; 423 424 #define CTL_HA_MAX_SG_ENTRIES 16 425 #define CTL_HA_DATAMOVE_SEGMENT 131072 426 427 /* 428 * Used for CTL_MSG_PERS_ACTION. 429 */ 430 struct ctl_ha_msg_pr { 431 struct ctl_ha_msg_hdr hdr; 432 struct ctl_pr_info pr_info; 433 }; 434 435 /* 436 * Used for CTL_MSG_UA. 437 */ 438 struct ctl_ha_msg_ua { 439 struct ctl_ha_msg_hdr hdr; 440 int ua_all; 441 int ua_set; 442 int ua_type; 443 uint8_t ua_info[8]; 444 }; 445 446 /* 447 * The S/G handling here is a little different than the standard ctl_scsiio 448 * structure, because we can't pass data by reference in between controllers. 449 * The S/G list in the ctl_scsiio struct is normally passed in the 450 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 451 * even if there is only one entry. 452 * 453 * Used for CTL_MSG_DATAMOVE. 454 */ 455 struct ctl_ha_msg_dt { 456 struct ctl_ha_msg_hdr hdr; 457 ctl_io_flags flags; /* Only I/O flags are used here */ 458 uint32_t sg_sequence; /* S/G portion number */ 459 uint8_t sg_last; /* last S/G batch = 1 */ 460 uint32_t sent_sg_entries; /* previous S/G count */ 461 uint32_t cur_sg_entries; /* current S/G entries */ 462 uint32_t kern_sg_entries; /* total S/G entries */ 463 uint32_t kern_data_len; /* Length of this S/G list */ 464 uint32_t kern_total_len; /* Total length of this 465 transaction */ 466 uint32_t kern_data_resid; /* Length left to transfer 467 after this*/ 468 uint32_t kern_rel_offset; /* Byte Offset of this 469 transfer */ 470 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 471 }; 472 473 /* 474 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU, 475 * and CTL_MSG_DATAMOVE_DONE. 476 */ 477 struct ctl_ha_msg_scsi { 478 struct ctl_ha_msg_hdr hdr; 479 uint32_t tag_num; /* tag number */ 480 ctl_tag_type tag_type; /* simple, ordered, etc. */ 481 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 482 uint8_t cdb_len; /* CDB length */ 483 uint8_t scsi_status; /* SCSI status byte */ 484 uint8_t sense_len; /* Returned sense length */ 485 uint32_t port_status; /* trans status, set by FETD, 486 0 = good*/ 487 uint32_t kern_data_resid; /* for DATAMOVE_DONE */ 488 struct scsi_sense_data sense_data; /* sense data */ 489 }; 490 491 /* 492 * Used for CTL_MSG_MANAGE_TASKS. 493 */ 494 struct ctl_ha_msg_task { 495 struct ctl_ha_msg_hdr hdr; 496 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 497 uint32_t tag_num; /* tag number */ 498 ctl_tag_type tag_type; /* simple, ordered, etc. */ 499 }; 500 501 /* 502 * Used for CTL_MSG_PORT_SYNC. 503 */ 504 struct ctl_ha_msg_port { 505 struct ctl_ha_msg_hdr hdr; 506 int port_type; 507 int physical_port; 508 int virtual_port; 509 int status; 510 int name_len; 511 int lun_map_len; 512 int port_devid_len; 513 int target_devid_len; 514 int init_devid_len; 515 uint8_t data[]; 516 }; 517 518 /* 519 * Used for CTL_MSG_LUN_SYNC. 520 */ 521 struct ctl_ha_msg_lun { 522 struct ctl_ha_msg_hdr hdr; 523 int flags; 524 unsigned int pr_generation; 525 uint32_t pr_res_idx; 526 uint8_t pr_res_type; 527 int lun_devid_len; 528 int pr_key_count; 529 uint8_t data[]; 530 }; 531 532 struct ctl_ha_msg_lun_pr_key { 533 uint32_t pr_iid; 534 uint64_t pr_key; 535 }; 536 537 /* 538 * Used for CTL_MSG_IID_SYNC. 539 */ 540 struct ctl_ha_msg_iid { 541 struct ctl_ha_msg_hdr hdr; 542 int in_use; 543 int name_len; 544 uint64_t wwpn; 545 uint8_t data[]; 546 }; 547 548 /* 549 * Used for CTL_MSG_MODE_SYNC. 550 */ 551 struct ctl_ha_msg_mode { 552 struct ctl_ha_msg_hdr hdr; 553 uint8_t page_code; 554 uint8_t subpage; 555 uint16_t page_len; 556 uint8_t data[]; 557 }; 558 559 union ctl_ha_msg { 560 struct ctl_ha_msg_hdr hdr; 561 struct ctl_ha_msg_task task; 562 struct ctl_ha_msg_scsi scsi; 563 struct ctl_ha_msg_dt dt; 564 struct ctl_ha_msg_pr pr; 565 struct ctl_ha_msg_ua ua; 566 struct ctl_ha_msg_port port; 567 struct ctl_ha_msg_lun lun; 568 struct ctl_ha_msg_iid iid; 569 struct ctl_ha_msg_login login; 570 struct ctl_ha_msg_mode mode; 571 }; 572 573 struct ctl_prio { 574 struct ctl_io_hdr io_hdr; 575 struct ctl_ha_msg_pr pr_msg; 576 }; 577 578 union ctl_io { 579 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 580 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 581 struct ctl_taskio taskio; /* SCSI task management/reset */ 582 struct ctl_prio presio; /* update per. res info on other SC */ 583 }; 584 585 #ifdef _KERNEL 586 587 union ctl_io *ctl_alloc_io(void *pool_ref); 588 union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 589 void ctl_free_io(union ctl_io *io); 590 void ctl_zero_io(union ctl_io *io); 591 592 #endif /* _KERNEL */ 593 594 #endif /* _CTL_IO_H_ */ 595 596 /* 597 * vim: ts=8 598 */ 599