1 /*- 2 * Copyright (c) 2003 Silicon Graphics International Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * substantially similar to the "NO WARRANTY" disclaimer below 13 * ("Disclaimer") and any redistribution must be conditioned upon 14 * including a substantially similar Disclaimer requirement for further 15 * binary redistribution. 16 * 17 * NO WARRANTY 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGES. 29 * 30 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_io.h#5 $ 31 * $FreeBSD$ 32 */ 33 /* 34 * CAM Target Layer data movement structures/interface. 35 * 36 * Author: Ken Merry <ken@FreeBSD.org> 37 */ 38 39 #ifndef _CTL_IO_H_ 40 #define _CTL_IO_H_ 41 42 #ifdef _CTL_C 43 #define EXTERN(__var,__val) __var = __val 44 #else 45 #define EXTERN(__var,__val) extern __var 46 #endif 47 48 #define CTL_MAX_CDBLEN 32 49 /* 50 * Uncomment this next line to enable printing out times for I/Os 51 * that take longer than CTL_TIME_IO_SECS seconds to get to the datamove 52 * and/or done stage. 53 */ 54 #define CTL_TIME_IO 55 #ifdef CTL_TIME_IO 56 #define CTL_TIME_IO_DEFAULT_SECS 90 57 EXTERN(int ctl_time_io_secs, CTL_TIME_IO_DEFAULT_SECS); 58 #endif 59 60 /* 61 * Uncomment these next two lines 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 #define CTL_TIMER_BYTES sizeof(struct callout) 68 69 typedef enum { 70 CTL_STATUS_NONE, /* No status */ 71 CTL_SUCCESS, /* Transaction completed successfully */ 72 CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */ 73 CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */ 74 CTL_ERROR, /* General CTL error XXX expand on this? */ 75 CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */ 76 CTL_CMD_ABORTED, /* Command aborted, don't return status */ 77 CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */ 78 CTL_AUTOSENSE = 0x1000 /* Autosense performed */ 79 } ctl_io_status; 80 81 /* 82 * WARNING: Keep the data in/out/none flags where they are. They're used 83 * in conjuction with ctl_cmd_flags. See comment above ctl_cmd_flags 84 * definition in ctl_private.h. 85 */ 86 typedef enum { 87 CTL_FLAG_NONE = 0x00000000, /* no flags */ 88 CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */ 89 CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */ 90 CTL_FLAG_DATA_NONE = 0x00000003, /* no data */ 91 CTL_FLAG_DATA_MASK = 0x00000003, 92 CTL_FLAG_KDPTR_SGLIST = 0x00000008, /* kern_data_ptr is S/G list*/ 93 CTL_FLAG_EDPTR_SGLIST = 0x00000010, /* ext_data_ptr is S/G list */ 94 CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */ 95 CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */ 96 CTL_FLAG_CONTROL_DEV = 0x00000080, /* processor device */ 97 CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */ 98 CTL_FLAG_BLOCKED = 0x00000200, /* on the blocked queue */ 99 CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */ 100 CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */ 101 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */ 102 CTL_FLAG_NO_DATASYNC = 0x00002000, /* don't cache flush data */ 103 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */ 104 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/ 105 CTL_FLAG_SENT_2OTHER_SC = 0x00010000, 106 CTL_FLAG_FROM_OTHER_SC = 0x00020000, 107 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/ 108 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS 109 addresses, not virtual ones*/ 110 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of 111 completing */ 112 CTL_FLAG_AUTO_MIRROR = 0x00200000, /* Automatically use memory 113 from the RC cache mirrored 114 address area. */ 115 #if 0 116 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */ 117 #endif 118 CTL_FLAG_NO_DATAMOVE = 0x00400000, 119 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/ 120 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/ 121 122 CTL_FLAG_REDIR_DONE = 0x02000000, /* Redirection has already 123 been done. */ 124 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */ 125 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */ 126 CTL_FLAG_RDMA_MASK = CTL_FLAG_NO_DATASYNC | CTL_FLAG_BUS_ADDR | 127 CTL_FLAG_AUTO_MIRROR | CTL_FLAG_REDIR_DONE, 128 /* Flags we care about for 129 remote DMA */ 130 CTL_FLAG_STATUS_SENT = 0x10000000 /* Status sent by datamove */ 131 } ctl_io_flags; 132 133 134 struct ctl_lba_len { 135 uint64_t lba; 136 uint32_t len; 137 }; 138 139 struct ctl_lba_len_flags { 140 uint64_t lba; 141 uint32_t len; 142 uint32_t flags; 143 #define CTL_LLF_FUA 0x04000000 144 #define CTL_LLF_DPO 0x08000000 145 #define CTL_LLF_READ 0x10000000 146 #define CTL_LLF_WRITE 0x20000000 147 #define CTL_LLF_VERIFY 0x40000000 148 #define CTL_LLF_COMPARE 0x80000000 149 }; 150 151 struct ctl_ptr_len_flags { 152 uint8_t *ptr; 153 uint32_t len; 154 uint32_t flags; 155 }; 156 157 union ctl_priv { 158 uint8_t bytes[sizeof(uint64_t) * 2]; 159 uint64_t integer; 160 void *ptr; 161 }; 162 163 /* 164 * Number of CTL private areas. 165 */ 166 #define CTL_NUM_PRIV 6 167 168 /* 169 * Which private area are we using for a particular piece of data? 170 */ 171 #define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */ 172 #define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/ 173 #define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */ 174 #define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */ 175 #define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */ 176 #define CTL_PRIV_FRONTEND 4 /* Frontend storage */ 177 #define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */ 178 179 #define CTL_INVALID_PORTNAME 0xFF 180 #define CTL_UNMAPPED_IID 0xFF 181 182 struct ctl_sg_entry { 183 void *addr; 184 size_t len; 185 }; 186 187 struct ctl_id { 188 uint32_t id; 189 uint64_t wwid[2]; 190 }; 191 192 typedef enum { 193 CTL_IO_NONE, 194 CTL_IO_SCSI, 195 CTL_IO_TASK, 196 } ctl_io_type; 197 198 struct ctl_nexus { 199 struct ctl_id initid; /* Initiator ID */ 200 uint32_t targ_port; /* Target port, filled in by PORT */ 201 struct ctl_id targ_target; /* Destination target */ 202 uint32_t targ_lun; /* Destination lun */ 203 uint32_t targ_mapped_lun; /* Destination lun CTL-wide */ 204 }; 205 206 typedef enum { 207 CTL_MSG_SERIALIZE, 208 CTL_MSG_R2R, 209 CTL_MSG_FINISH_IO, 210 CTL_MSG_BAD_JUJU, 211 CTL_MSG_MANAGE_TASKS, 212 CTL_MSG_PERS_ACTION, 213 CTL_MSG_SYNC_FE, 214 CTL_MSG_DATAMOVE, 215 CTL_MSG_DATAMOVE_DONE 216 } ctl_msg_type; 217 218 struct ctl_scsiio; 219 220 #define CTL_NUM_SG_ENTRIES 9 221 222 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 uint8_t timer_bytes[CTL_TIMER_BYTES]; /* timer kludge */ 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 uint32_t num_dmas; /* Number of DMAs */ 242 #endif /* CTL_TIME_IO */ 243 union ctl_io *original_sc; 244 union ctl_io *serializing_sc; 245 void *pool; /* I/O pool */ 246 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 247 struct ctl_sg_entry remote_sglist[CTL_NUM_SG_ENTRIES]; 248 struct ctl_sg_entry remote_dma_sglist[CTL_NUM_SG_ENTRIES]; 249 struct ctl_sg_entry local_sglist[CTL_NUM_SG_ENTRIES]; 250 struct ctl_sg_entry local_dma_sglist[CTL_NUM_SG_ENTRIES]; 251 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 252 TAILQ_ENTRY(ctl_io_hdr) ooa_links; 253 TAILQ_ENTRY(ctl_io_hdr) blocked_links; 254 }; 255 256 typedef enum { 257 CTL_TAG_UNTAGGED, 258 CTL_TAG_SIMPLE, 259 CTL_TAG_ORDERED, 260 CTL_TAG_HEAD_OF_QUEUE, 261 CTL_TAG_ACA 262 } ctl_tag_type; 263 264 union ctl_io; 265 266 /* 267 * SCSI passthrough I/O structure for the CAM Target Layer. Note 268 * that some of these fields are here for completeness, but they aren't 269 * used in the CTL implementation. e.g., timeout and retries won't be 270 * used. 271 * 272 * Note: Make sure the io_hdr is *always* the first element in this 273 * structure. 274 */ 275 struct ctl_scsiio { 276 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 277 278 /* 279 * The ext_* fields are generally intended for frontend use; CTL itself 280 * doesn't modify or use them. 281 */ 282 uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 283 uint8_t *ext_data_ptr; /* data buffer or S/G list */ 284 uint32_t ext_data_len; /* Data transfer length */ 285 uint32_t ext_data_filled; /* Amount of data filled so far */ 286 287 /* 288 * The number of scatter/gather entries in the list pointed to 289 * by kern_data_ptr. 0 means there is no list, just a data pointer. 290 */ 291 uint32_t kern_sg_entries; 292 293 uint32_t rem_sg_entries; /* Unused. */ 294 295 /* 296 * The data pointer or a pointer to the scatter/gather list. 297 */ 298 uint8_t *kern_data_ptr; 299 300 /* 301 * Length of the data buffer or scatter/gather list. It's also 302 * the length of this particular piece of the data transfer, 303 * ie. number of bytes expected to be transferred by the current 304 * invocation of frontend's datamove() callback. It's always 305 * less than or equal to kern_total_len. 306 */ 307 uint32_t kern_data_len; 308 309 /* 310 * Total length of data to be transferred during this particular 311 * SCSI command, as decoded from SCSI CDB. 312 */ 313 uint32_t kern_total_len; 314 315 /* 316 * Amount of data left after the current data transfer. 317 */ 318 uint32_t kern_data_resid; 319 320 /* 321 * Byte offset of this transfer, equal to the amount of data 322 * already transferred for this SCSI command during previous 323 * datamove() invocations. 324 */ 325 uint32_t kern_rel_offset; 326 327 struct scsi_sense_data sense_data; /* sense data */ 328 uint8_t sense_len; /* Returned sense length */ 329 uint8_t scsi_status; /* SCSI status byte */ 330 uint8_t sense_residual; /* Unused. */ 331 uint32_t residual; /* data residual length */ 332 uint32_t tag_num; /* tag number */ 333 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 334 uint8_t cdb_len; /* CDB length */ 335 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 336 int (*be_move_done)(union ctl_io *io); /* called by fe */ 337 int (*io_cont)(union ctl_io *io); /* to continue processing */ 338 }; 339 340 typedef enum { 341 CTL_TASK_ABORT_TASK, 342 CTL_TASK_ABORT_TASK_SET, 343 CTL_TASK_CLEAR_ACA, 344 CTL_TASK_CLEAR_TASK_SET, 345 CTL_TASK_I_T_NEXUS_RESET, 346 CTL_TASK_LUN_RESET, 347 CTL_TASK_TARGET_RESET, 348 CTL_TASK_BUS_RESET, 349 CTL_TASK_PORT_LOGIN, 350 CTL_TASK_PORT_LOGOUT 351 } ctl_task_type; 352 353 /* 354 * Task management I/O structure. Aborts, bus resets, etc., are sent using 355 * this structure. 356 * 357 * Note: Make sure the io_hdr is *always* the first element in this 358 * structure. 359 */ 360 struct ctl_taskio { 361 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 362 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 363 uint32_t tag_num; /* tag number */ 364 ctl_tag_type tag_type; /* simple, ordered, etc. */ 365 }; 366 367 typedef enum { 368 CTL_PR_REG_KEY, 369 CTL_PR_UNREG_KEY, 370 CTL_PR_PREEMPT, 371 CTL_PR_CLEAR, 372 CTL_PR_RESERVE, 373 CTL_PR_RELEASE 374 } ctl_pr_action; 375 376 /* 377 * The PR info is specifically for sending Persistent Reserve actions 378 * to the other SC which it must also act on. 379 * 380 * Note: Make sure the io_hdr is *always* the first element in this 381 * structure. 382 */ 383 struct ctl_pr_info { 384 ctl_pr_action action; 385 uint8_t sa_res_key[8]; 386 uint8_t res_type; 387 uint32_t residx; 388 }; 389 390 struct ctl_ha_msg_hdr { 391 ctl_msg_type msg_type; 392 union ctl_io *original_sc; 393 union ctl_io *serializing_sc; 394 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 395 uint32_t status; /* transaction status */ 396 TAILQ_ENTRY(ctl_ha_msg_hdr) links; 397 }; 398 399 #define CTL_HA_MAX_SG_ENTRIES 16 400 401 /* 402 * Used for CTL_MSG_PERS_ACTION. 403 */ 404 struct ctl_ha_msg_pr { 405 struct ctl_ha_msg_hdr hdr; 406 struct ctl_pr_info pr_info; 407 }; 408 409 /* 410 * The S/G handling here is a little different than the standard ctl_scsiio 411 * structure, because we can't pass data by reference in between controllers. 412 * The S/G list in the ctl_scsiio struct is normally passed in the 413 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 414 * even if there is only one entry. 415 * 416 * Used for CTL_MSG_DATAMOVE. 417 */ 418 struct ctl_ha_msg_dt { 419 struct ctl_ha_msg_hdr hdr; 420 ctl_io_flags flags; /* Only I/O flags are used here */ 421 uint32_t sg_sequence; /* S/G portion number */ 422 uint8_t sg_last; /* last S/G batch = 1 */ 423 uint32_t sent_sg_entries; /* previous S/G count */ 424 uint32_t cur_sg_entries; /* current S/G entries */ 425 uint32_t kern_sg_entries; /* total S/G entries */ 426 uint32_t kern_data_len; /* Length of this S/G list */ 427 uint32_t kern_total_len; /* Total length of this 428 transaction */ 429 uint32_t kern_data_resid; /* Length left to transfer 430 after this*/ 431 uint32_t kern_rel_offset; /* Byte Offset of this 432 transfer */ 433 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 434 }; 435 436 /* 437 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU. 438 */ 439 struct ctl_ha_msg_scsi { 440 struct ctl_ha_msg_hdr hdr; 441 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 442 uint32_t tag_num; /* tag number */ 443 ctl_tag_type tag_type; /* simple, ordered, etc. */ 444 uint8_t scsi_status; /* SCSI status byte */ 445 struct scsi_sense_data sense_data; /* sense data */ 446 uint8_t sense_len; /* Returned sense length */ 447 uint8_t sense_residual; /* sense residual length */ 448 uint32_t residual; /* data residual length */ 449 uint32_t fetd_status; /* trans status, set by FETD, 450 0 = good*/ 451 struct ctl_lba_len lbalen; /* used for stats */ 452 }; 453 454 /* 455 * Used for CTL_MSG_MANAGE_TASKS. 456 */ 457 struct ctl_ha_msg_task { 458 struct ctl_ha_msg_hdr hdr; 459 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 460 uint32_t tag_num; /* tag number */ 461 ctl_tag_type tag_type; /* simple, ordered, etc. */ 462 }; 463 464 union ctl_ha_msg { 465 struct ctl_ha_msg_hdr hdr; 466 struct ctl_ha_msg_task task; 467 struct ctl_ha_msg_scsi scsi; 468 struct ctl_ha_msg_dt dt; 469 struct ctl_ha_msg_pr pr; 470 }; 471 472 473 struct ctl_prio { 474 struct ctl_io_hdr io_hdr; 475 struct ctl_ha_msg_pr pr_msg; 476 }; 477 478 479 480 union ctl_io { 481 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 482 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 483 struct ctl_taskio taskio; /* SCSI task management/reset */ 484 struct ctl_prio presio; /* update per. res info on other SC */ 485 }; 486 487 #ifdef _KERNEL 488 489 union ctl_io *ctl_alloc_io(void *pool_ref); 490 union ctl_io *ctl_alloc_io_nowait(void *pool_ref); 491 void ctl_free_io(union ctl_io *io); 492 void ctl_zero_io(union ctl_io *io); 493 void ctl_copy_io(union ctl_io *src, union ctl_io *dest); 494 495 #endif /* _KERNEL */ 496 497 #endif /* _CTL_IO_H_ */ 498 499 /* 500 * vim: ts=8 501 */ 502