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 57EXTERN(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 69typedef 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 */ 86typedef 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 = 0x00000800, /* this I/O should be aborted */ 100 CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */ 101 CTL_FLAG_NO_DATASYNC = 0x00002000, /* don't cache flush data */ 102 CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */ 103 CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/ 104 CTL_FLAG_SENT_2OTHER_SC = 0x00010000, 105 CTL_FLAG_FROM_OTHER_SC = 0x00020000, 106 CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/ 107 CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS 108 addresses, not virtual ones*/ 109 CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of 110 completing */ 111 CTL_FLAG_AUTO_MIRROR = 0x00200000, /* Automatically use memory 112 from the RC cache mirrored 113 address area. */ 114#if 0 115 CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */ 116#endif 117 CTL_FLAG_NO_DATAMOVE = 0x00400000, 118 CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/ 119 CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/ 120 121 CTL_FLAG_REDIR_DONE = 0x02000000, /* Redirection has already 122 been done. */ 123 CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */ 124 CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */ 125 CTL_FLAG_RDMA_MASK = CTL_FLAG_NO_DATASYNC | CTL_FLAG_BUS_ADDR | 126 CTL_FLAG_AUTO_MIRROR | CTL_FLAG_REDIR_DONE 127 /* Flags we care about for 128 remote DMA */ 129} ctl_io_flags; 130 131 132struct ctl_lba_len { 133 uint64_t lba; 134 uint32_t len; 135}; 136 137union ctl_priv { 138 uint8_t bytes[sizeof(uint64_t) * 2]; 139 uint64_t integer; 140 void *ptr; 141}; 142 143/* 144 * Number of CTL private areas. 145 */ 146#define CTL_NUM_PRIV 6 147 148/* 149 * Which private area are we using for a particular piece of data? 150 */ 151#define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */ 152#define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/ 153#define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */ 154#define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */ 155#define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */ 156#define CTL_PRIV_FRONTEND 4 /* LSI driver, ioctl front end */ 157#define CTL_PRIV_USER 5 /* Userland use */ 158 159#define CTL_INVALID_PORTNAME 0xFF 160#define CTL_UNMAPPED_IID 0xFF 161/* 162 * XXX KDM this size is for the port_priv variable in struct ctl_io_hdr 163 * below. This should be defined in terms of the size of struct 164 * ctlfe_lun_cmd_info at the moment: 165 * struct ctlfe_lun_cmd_info { 166 * int cur_transfer_index; 167 * ctlfe_cmd_flags flags; 168 * bus_dma_segment_t cam_sglist[32]; 169 * }; 170 * 171 * This isn't really the way I'd prefer to do it, but it does make some 172 * sense, AS LONG AS we can guarantee that there will always only be one 173 * outstanding DMA request per ctl_io. If that assumption isn't valid, 174 * then we've got problems. 175 * 176 * At some point it may be nice switch CTL over to using CCBs for 177 * everything. At that point we can probably use the ATIO/CTIO model, so 178 * that multiple simultaneous DMAs per command will just work. 179 * 180 * Also note that the current size, 600, is appropriate for 64-bit 181 * architectures, but is overkill for 32-bit architectures. Need a way to 182 * figure out the size at compile time, or just get rid of this altogether. 183 */ 184#define CTL_PORT_PRIV_SIZE 600 185 186struct ctl_sg_entry { 187 void *addr; 188 size_t len; 189}; 190 191struct ctl_id { 192 uint32_t id; 193 uint64_t wwid[2]; 194}; 195 196typedef enum { 197 CTL_IO_NONE, 198 CTL_IO_SCSI, 199 CTL_IO_TASK, 200} ctl_io_type; 201 202struct ctl_nexus { 203 struct ctl_id initid; /* Initiator ID */ 204 uint32_t targ_port; /* Target port, filled in by PORT */ 205 struct ctl_id targ_target; /* Destination target */ 206 uint32_t targ_lun; /* Destination lun */ 207}; 208 209typedef enum { 210 CTL_MSG_SERIALIZE, 211 CTL_MSG_R2R, 212 CTL_MSG_FINISH_IO, 213 CTL_MSG_BAD_JUJU, 214 CTL_MSG_MANAGE_TASKS, 215 CTL_MSG_PERS_ACTION, 216 CTL_MSG_SYNC_FE, 217 CTL_MSG_APS_LOCK, 218 CTL_MSG_DATAMOVE, 219 CTL_MSG_DATAMOVE_DONE 220} ctl_msg_type; 221 222struct ctl_scsiio; 223 224#define CTL_NUM_SG_ENTRIES 9 225 226struct ctl_io_hdr { 227 uint32_t version; /* interface version XXX */ 228 ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */ 229 ctl_msg_type msg_type; 230 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 231 uint32_t iid_indx; /* the index into the iid mapping */ 232 uint32_t flags; /* transaction flags */ 233 uint32_t status; /* transaction status */ 234 uint32_t port_status; /* trans status, set by PORT, 0 = good*/ 235 uint32_t timeout; /* timeout in ms */ 236 uint32_t retries; /* retry count */ 237#ifdef CTL_IO_DELAY 238 uint8_t timer_bytes[CTL_TIMER_BYTES]; /* timer kludge */ 239#endif /* CTL_IO_DELAY */ 240#ifdef CTL_TIME_IO 241 time_t start_time; /* I/O start time */ 242 struct bintime start_bt; /* Timer start ticks */ 243 struct bintime dma_start_bt; /* DMA start ticks */ 244 struct bintime dma_bt; /* DMA total ticks */ 245 uint32_t num_dmas; /* Number of DMAs */ 246#endif /* CTL_TIME_IO */ 247 union ctl_io *original_sc; 248 union ctl_io *serializing_sc; 249 void *pool; /* I/O pool */ 250 union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */ 251 uint8_t port_priv[CTL_PORT_PRIV_SIZE];/* PORT private area*/ 252 struct ctl_sg_entry remote_sglist[CTL_NUM_SG_ENTRIES]; 253 struct ctl_sg_entry remote_dma_sglist[CTL_NUM_SG_ENTRIES]; 254 struct ctl_sg_entry local_sglist[CTL_NUM_SG_ENTRIES]; 255 struct ctl_sg_entry local_dma_sglist[CTL_NUM_SG_ENTRIES]; 256 STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */ 257 TAILQ_ENTRY(ctl_io_hdr) ooa_links; 258 TAILQ_ENTRY(ctl_io_hdr) blocked_links; 259}; 260 261typedef enum { 262 CTL_TAG_UNTAGGED, 263 CTL_TAG_SIMPLE, 264 CTL_TAG_ORDERED, 265 CTL_TAG_HEAD_OF_QUEUE, 266 CTL_TAG_ACA 267} ctl_tag_type; 268 269union ctl_io; 270 271/* 272 * SCSI passthrough I/O structure for the CAM Target Layer. Note 273 * that some of these fields are here for completeness, but they aren't 274 * used in the CTL implementation. e.g., timeout and retries won't be 275 * used. 276 * 277 * Note: Make sure the io_hdr is *always* the first element in this 278 * structure. 279 */ 280struct ctl_scsiio { 281 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 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 uint32_t kern_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 287 uint32_t rem_sg_entries; /* 0 = no S/G list, > 0 = num entries */ 288 uint8_t *kern_data_ptr; /* data buffer or S/G list */ 289 uint32_t kern_data_len; /* Length of this S/G list/buffer */ 290 uint32_t kern_total_len; /* Total length of this transaction */ 291 uint32_t kern_data_resid; /* Length left to transfer after this*/ 292 uint32_t kern_rel_offset; /* Byte Offset of this transfer */ 293 struct scsi_sense_data sense_data; /* sense data */ 294 uint8_t sense_len; /* Returned sense length */ 295 uint8_t scsi_status; /* SCSI status byte */ 296 uint8_t sense_residual; /* sense residual length */ 297 uint32_t residual; /* data residual length */ 298 uint32_t tag_num; /* tag number */ 299 ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/ 300 uint8_t cdb_len; /* CDB length */ 301 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 302 int (*be_move_done)(union ctl_io *io); /* called by fe */ 303 int (*io_cont)(union ctl_io *io); /* to continue processing */ 304}; 305 306typedef enum { 307 CTL_TASK_ABORT_TASK, 308 CTL_TASK_ABORT_TASK_SET, 309 CTL_TASK_CLEAR_ACA, 310 CTL_TASK_CLEAR_TASK_SET, 311 CTL_TASK_LUN_RESET, 312 CTL_TASK_TARGET_RESET, 313 CTL_TASK_BUS_RESET, 314 CTL_TASK_PORT_LOGIN, 315 CTL_TASK_PORT_LOGOUT 316} ctl_task_type; 317 318/* 319 * Task management I/O structure. Aborts, bus resets, etc., are sent using 320 * this structure. 321 * 322 * Note: Make sure the io_hdr is *always* the first element in this 323 * structure. 324 */ 325struct ctl_taskio { 326 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 327 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 328 uint32_t tag_num; /* tag number */ 329 ctl_tag_type tag_type; /* simple, ordered, etc. */ 330}; 331 332typedef enum { 333 CTL_PR_REG_KEY, 334 CTL_PR_UNREG_KEY, 335 CTL_PR_PREEMPT, 336 CTL_PR_CLEAR, 337 CTL_PR_RESERVE, 338 CTL_PR_RELEASE 339} ctl_pr_action; 340 341/* 342 * The PR info is specifically for sending Persistent Reserve actions 343 * to the other SC which it must also act on. 344 * 345 * Note: Make sure the io_hdr is *always* the first element in this 346 * structure. 347 */ 348struct ctl_pr_info { 349 ctl_pr_action action; 350 uint8_t sa_res_key[8]; 351 uint8_t res_type; 352 uint16_t residx; 353}; 354 355struct ctl_ha_msg_hdr { 356 ctl_msg_type msg_type; 357 union ctl_io *original_sc; 358 union ctl_io *serializing_sc; 359 struct ctl_nexus nexus; /* Initiator, port, target, lun */ 360 uint32_t status; /* transaction status */ 361 TAILQ_ENTRY(ctl_ha_msg_hdr) links; 362}; 363 364#define CTL_HA_MAX_SG_ENTRIES 16 365 366/* 367 * Used for CTL_MSG_APS_LOCK. 368 */ 369struct ctl_ha_msg_aps { 370 struct ctl_ha_msg_hdr hdr; 371 uint8_t lock_flag; 372}; 373 374/* 375 * Used for CTL_MSG_PERS_ACTION. 376 */ 377struct ctl_ha_msg_pr { 378 struct ctl_ha_msg_hdr hdr; 379 struct ctl_pr_info pr_info; 380}; 381 382/* 383 * The S/G handling here is a little different than the standard ctl_scsiio 384 * structure, because we can't pass data by reference in between controllers. 385 * The S/G list in the ctl_scsiio struct is normally passed in the 386 * kern_data_ptr field. So kern_sg_entries here will always be non-zero, 387 * even if there is only one entry. 388 * 389 * Used for CTL_MSG_DATAMOVE. 390 */ 391struct ctl_ha_msg_dt { 392 struct ctl_ha_msg_hdr hdr; 393 ctl_io_flags flags; /* Only I/O flags are used here */ 394 uint32_t sg_sequence; /* S/G portion number */ 395 uint8_t sg_last; /* last S/G batch = 1 */ 396 uint32_t sent_sg_entries; /* previous S/G count */ 397 uint32_t cur_sg_entries; /* current S/G entries */ 398 uint32_t kern_sg_entries; /* total S/G entries */ 399 uint32_t kern_data_len; /* Length of this S/G list */ 400 uint32_t kern_total_len; /* Total length of this 401 transaction */ 402 uint32_t kern_data_resid; /* Length left to transfer 403 after this*/ 404 uint32_t kern_rel_offset; /* Byte Offset of this 405 transfer */ 406 struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES]; 407}; 408 409/* 410 * Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU. 411 */ 412struct ctl_ha_msg_scsi { 413 struct ctl_ha_msg_hdr hdr; 414 uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */ 415 uint32_t tag_num; /* tag number */ 416 ctl_tag_type tag_type; /* simple, ordered, etc. */ 417 uint8_t scsi_status; /* SCSI status byte */ 418 struct scsi_sense_data sense_data; /* sense data */ 419 uint8_t sense_len; /* Returned sense length */ 420 uint8_t sense_residual; /* sense residual length */ 421 uint32_t residual; /* data residual length */ 422 uint32_t fetd_status; /* trans status, set by FETD, 423 0 = good*/ 424 struct ctl_lba_len lbalen; /* used for stats */ 425}; 426 427/* 428 * Used for CTL_MSG_MANAGE_TASKS. 429 */ 430struct ctl_ha_msg_task { 431 struct ctl_ha_msg_hdr hdr; 432 ctl_task_type task_action; /* Target Reset, Abort, etc. */ 433 uint32_t tag_num; /* tag number */ 434 ctl_tag_type tag_type; /* simple, ordered, etc. */ 435}; 436 437union ctl_ha_msg { 438 struct ctl_ha_msg_hdr hdr; 439 struct ctl_ha_msg_task task; 440 struct ctl_ha_msg_scsi scsi; 441 struct ctl_ha_msg_dt dt; 442 struct ctl_ha_msg_pr pr; 443 struct ctl_ha_msg_aps aps; 444}; 445 446 447struct ctl_prio { 448 struct ctl_io_hdr io_hdr; 449 struct ctl_ha_msg_pr pr_msg; 450}; 451 452 453 454union ctl_io { 455 struct ctl_io_hdr io_hdr; /* common to all I/O types */ 456 struct ctl_scsiio scsiio; /* Normal SCSI commands */ 457 struct ctl_taskio taskio; /* SCSI task management/reset */ 458 struct ctl_prio presio; /* update per. res info on other SC */ 459}; 460 461#ifdef _KERNEL 462 463union ctl_io *ctl_alloc_io(void *pool_ref); 464void ctl_free_io(union ctl_io *io); 465void ctl_zero_io(union ctl_io *io); 466void ctl_copy_io(union ctl_io *src, union ctl_io *dest); 467 468#endif /* _KERNEL */ 469 470#endif /* _CTL_IO_H_ */ 471 472/* 473 * vim: ts=8 474 */ 475