sys/bus/cam/scsi/scsi_low.h

   1 /*      $FreeBSD: src/sys/cam/scsi/scsi_low.h,v 1.1.2.4 2001/07/22 00:21:41 non Exp $   */
   2 /*      $NecBSD: scsi_low.h,v 1.24.10.5 2001/06/26 07:31:46 honda Exp $ */
   3 /*      $NetBSD$        */
   4
   5 #define SCSI_LOW_DIAGNOSTIC
   6 #define SCSI_LOW_ALT_QTAG_ALLOCATE
   7
   8 /*
   9  * [NetBSD for NEC PC-98 series]
  10  *  Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2001
  11  *      NetBSD/pc98 porting staff. All rights reserved.
  12  *  Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2001
  13  *      Naofumi HONDA. All rights reserved.
  14  *
  15  * [Ported for FreeBSD CAM]
  16  *  Copyright (c) 2000, 2001
  17  *      MITSUNAGA Noriaki, NOKUBI Hirotaka and TAKAHASHI Yoshihiro.
  18  *      All rights reserved.
  19  *
  20  *  Redistribution and use in source and binary forms, with or without
  21  *  modification, are permitted provided that the following conditions
  22  *  are met:
  23  *  1. Redistributions of source code must retain the above copyright
  24  *     notice, this list of conditions and the following disclaimer.
  25  *  2. Redistributions in binary form must reproduce the above copyright
  26  *     notice, this list of conditions and the following disclaimer in the
  27  *     documentation and/or other materials provided with the distribution.
  28  *  3. The name of the author may not be used to endorse or promote products
  29  *     derived from this software without specific prior written permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  32  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  33  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  34  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  35  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  36  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  37  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  40  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGE.
  42  */
  43
  44 #ifndef _SCSI_LOW_H_
  45 #define _SCSI_LOW_H_
  46
  47 #define SCSI_LOW_INTERFACE_CAM
  48
  49 #include <sys/device_port.h>
  50 #include <sys/ccbque.h>
  51 #include <bus/cam/cam.h>
  52 #include <bus/cam/cam_ccb.h>
  53 #include <bus/cam/cam_sim.h>
  54 #include <bus/cam/cam_xpt_sim.h>
  55 #include <bus/cam/cam_debug.h>
  56
  57 #include "scsi_dvcfg.h"
  58
  59 #undef  MSG_IDENTIFY
  60 #define SCSI_LOW_DEBUGGER(dev)  Debugger((dev))
  61 #define SCSI_LOW_DELAY(mu)      DELAY((mu))
  62 #define SCSI_LOW_BZERO(pt, size)        bzero((pt), (size))
  63
  64 typedef struct scsi_sense_data scsi_low_osdep_sense_data_t;
  65
  66 struct scsi_low_osdep_interface {
  67         DEVPORT_DEVICE si_dev;
  68
  69         struct cam_sim *sim;
  70         struct cam_path *path;
  71
  72         int si_poll_count;
  73
  74         struct callout engage_ch;
  75         struct callout timeout_ch;
  76 };
  77
  78 struct scsi_low_osdep_targ_interface {
  79 };
  80
  81 struct scsi_low_osdep_lun_interface {
  82 };
  83
  84 /******** os depend interface functions *************/
  85 struct slccb;
  86 struct scsi_low_softc;
  87 #define SCSI_LOW_TIMEOUT_STOP           0
  88 #define SCSI_LOW_TIMEOUT_START          1
  89 #define SCSI_LOW_TIMEOUT_CH_IO          0
  90 #define SCSI_LOW_TIMEOUT_CH_ENGAGE      1
  91 #define SCSI_LOW_TIMEOUT_CH_RECOVER     2
  92
  93 struct scsi_low_osdep_funcs {
  94         int (*scsi_low_osdep_attach) \
  95                         (struct scsi_low_softc *);
  96         int (*scsi_low_osdep_world_start) \
  97                         (struct scsi_low_softc *);
  98         int (*scsi_low_osdep_dettach) \
  99                         (struct scsi_low_softc *);
 100         int (*scsi_low_osdep_ccb_setup) \
 101                         (struct scsi_low_softc *, struct slccb *);
 102         int (*scsi_low_osdep_done) \
 103                         (struct scsi_low_softc *, struct slccb *);
 104         void (*scsi_low_osdep_timeout) \
 105                         (struct scsi_low_softc *, int, int);
 106 };
 107
 108 /*================================================
 109  * Generic Scsi Low header file
 110  * (All os depend structures should be above!)
 111  ================================================*/
 112 /*************************************************
 113  * Scsi low definitions
 114  *************************************************/
 115 #define SCSI_LOW_SYNC           DVF_SCSI_SYNC
 116 #define SCSI_LOW_DISC           DVF_SCSI_DISC
 117 #define SCSI_LOW_WAIT           DVF_SCSI_WAIT
 118 #define SCSI_LOW_LINK           DVF_SCSI_LINK
 119 #define SCSI_LOW_QTAG           DVF_SCSI_QTAG
 120 #define SCSI_LOW_NOPARITY       DVF_SCSI_NOPARITY
 121 #define SCSI_LOW_SAVESP         DVF_SCSI_SAVESP
 122 #define SCSI_LOW_DEFCFG         DVF_SCSI_DEFCFG
 123 #define SCSI_LOW_BITS           DVF_SCSI_BITS
 124
 125 #define SCSI_LOW_PERIOD(n)      DVF_SCSI_PERIOD(n)
 126 #define SCSI_LOW_OFFSET(n)      DVF_SCSI_OFFSET(n)
 127
 128 /* host scsi id and targets macro */
 129 #ifndef SCSI_LOW_NTARGETS
 130 #define SCSI_LOW_NTARGETS                       8
 131 #endif  /* SCSI_LOW_NTARGETS */
 132 #define SCSI_LOW_NCCB                           128
 133
 134 #define SCSI_LOW_MAX_RETRY                      3
 135 #define SCSI_LOW_MAX_SELECTION_RETRY            10
 136
 137 /* timeout control macro */
 138 #define SCSI_LOW_TIMEOUT_HZ                     10
 139 #define SCSI_LOW_MIN_TOUT                       12
 140 #define SCSI_LOW_TIMEOUT_CHECK_INTERVAL         1
 141 #define SCSI_LOW_POWDOWN_TC                     15
 142 #define SCSI_LOW_MAX_PHCHANGES                  256
 143 #define SCSI2_RESET_DELAY                       5000000
 144
 145 /* msg */
 146 #define SCSI_LOW_MAX_MSGLEN                     32
 147 #define SCSI_LOW_MSG_LOG_DATALEN                8
 148
 149 /*************************************************
 150  * Scsi Data Pointer
 151  *************************************************/
 152 /* scsi pointer */
 153 struct sc_p {
 154         u_int8_t *scp_data;
 155         int scp_datalen;
 156
 157         u_int8_t *scp_cmd;
 158         int scp_cmdlen;
 159
 160         u_int8_t scp_direction;
 161 #define SCSI_LOW_RWUNK  (-1)
 162 #define SCSI_LOW_WRITE  0
 163 #define SCSI_LOW_READ   1
 164         u_int8_t scp_status;
 165         u_int8_t scp_spare[2];
 166 };
 167
 168 /*************************************************
 169  * Command Control Block Structure
 170  *************************************************/
 171 typedef int scsi_low_tag_t;
 172 struct targ_info;
 173
 174 #define SCSI_LOW_UNKLUN ((u_int) -1)
 175 #define SCSI_LOW_UNKTAG ((scsi_low_tag_t) -1)
 176
 177 struct slccb {
 178         TAILQ_ENTRY(slccb) ccb_chain;
 179
 180         void *osdep;                    /* os depend structure */
 181
 182         struct targ_info *ti;           /* targ_info */
 183         struct lun_info *li;            /* lun info */
 184         struct buf *bp;                 /* io bufs */
 185
 186         scsi_low_tag_t ccb_tag;         /* effective qtag */
 187         scsi_low_tag_t ccb_otag;        /* allocated qtag */
 188
 189         /*****************************************
 190          * Scsi data pointers (original and saved)
 191          *****************************************/
 192         struct sc_p ccb_scp;            /* given */
 193         struct sc_p ccb_sscp;           /* saved scsi data pointer */
 194         int ccb_datalen;                /* transfered data counter */
 195
 196         /*****************************************
 197          * Msgout
 198          *****************************************/
 199         u_int ccb_msgoutflag;
 200         u_int ccb_omsgoutflag;
 201
 202         /*****************************************
 203          * Error or Timeout counters
 204          *****************************************/
 205         u_int ccb_flags;
 206 #define CCB_INTERNAL    0x0001
 207 #define CCB_SENSE       0x0002
 208 #define CCB_CLEARQ      0x0004
 209 #define CCB_DISCQ       0x0008
 210 #define CCB_STARTQ      0x0010
 211 #define CCB_POLLED      0x0100  /* polling ccb */
 212 #define CCB_NORETRY     0x0200  /* do NOT retry */
 213 #define CCB_AUTOSENSE   0x0400  /* do a sence after CA */
 214 #define CCB_URGENT      0x0800  /* an urgent ccb */
 215 #define CCB_NOSDONE     0x1000  /* do not call an os done routine */
 216 #define CCB_SCSIIO      0x2000  /* a normal scsi io coming from upper layer */
 217 #define CCB_SILENT      0x4000  /* no terminate messages */
 218
 219         u_int ccb_error;
 220
 221         int ccb_rcnt;                   /* retry counter */
 222         int ccb_selrcnt;                /* selection retry counter */
 223         int ccb_tc;                     /* timer counter */
 224         int ccb_tcmax;                  /* max timeout */
 225
 226         /*****************************************
 227          * Sense data buffer
 228          *****************************************/
 229         u_int8_t ccb_scsi_cmd[12];
 230         scsi_low_osdep_sense_data_t ccb_sense;
 231 };
 232
 233 /*************************************************
 234  * Slccb functions
 235  *************************************************/
 236 GENERIC_CCB_ASSERT(scsi_low, slccb)
 237
 238 /*************************************************
 239  * Target and Lun structures
 240  *************************************************/
 241 struct scsi_low_softc;
 242 LIST_HEAD(scsi_low_softc_tab, scsi_low_softc);
 243 TAILQ_HEAD(targ_info_tab, targ_info);
 244 LIST_HEAD(lun_info_tab, lun_info);
 245
 246 struct lun_info {
 247         struct scsi_low_osdep_lun_interface li_sloi;
 248
 249         int li_lun;
 250         struct targ_info *li_ti;                /* my target */
 251
 252         LIST_ENTRY(lun_info) lun_chain;         /* targ_info link */
 253
 254         struct slccbtab li_discq;                       /* disconnect queue */
 255
 256         /*
 257          * qtag control
 258          */
 259         int li_maxnexus;
 260         int li_maxnqio;
 261         int li_nqio;
 262         int li_disc;
 263
 264 #define SCSI_LOW_MAXNEXUS (sizeof(u_int) * NBBY)
 265         u_int li_qtagbits;
 266
 267 #ifdef  SCSI_LOW_ALT_QTAG_ALLOCATE
 268         u_int8_t li_qtagarray[SCSI_LOW_MAXNEXUS];
 269         u_int li_qd;
 270 #endif  /* SCSI_LOW_ALT_QTAG_ALLOCATE */
 271
 272 #define SCSI_LOW_QFLAG_CA_QCLEAR        0x01
 273         u_int li_qflags;
 274
 275         /*
 276          * lun state
 277          */
 278 #define SCSI_LOW_LUN_SLEEP      0x00
 279 #define SCSI_LOW_LUN_START      0x01
 280 #define SCSI_LOW_LUN_INQ        0x02
 281 #define SCSI_LOW_LUN_MODEQ      0x03
 282 #define SCSI_LOW_LUN_OK         0x04
 283         u_int li_state;                         /* target lun state */
 284
 285         /*
 286          * lun control flags
 287          */
 288         u_int li_flags_valid;   /* valid flags */
 289 #define SCSI_LOW_LUN_FLAGS_USER_VALID   0x0001
 290 #define SCSI_LOW_LUN_FLAGS_DISK_VALID   0x0002
 291 #define SCSI_LOW_LUN_FLAGS_QUIRKS_VALID 0x0004
 292 #define SCSI_LOW_LUN_FLAGS_ALL_VALID \
 293         (SCSI_LOW_LUN_FLAGS_USER_VALID | \
 294          SCSI_LOW_LUN_FLAGS_DISK_VALID | SCSI_LOW_LUN_FLAGS_QUIRKS_VALID)
 295
 296         u_int li_flags;         /* real lun control flags */
 297         u_int li_cfgflags;      /* lun control flags given by user */
 298         u_int li_diskflags;     /* lun control flags given by hardware info */
 299         u_int li_quirks;        /* lun control flags given by upper layer */
 300
 301         /* inq buffer */
 302         struct scsi_low_inq_data {
 303                 u_int8_t sd_type;
 304                 u_int8_t sd_sp1;
 305                 u_int8_t sd_version;
 306                 u_int8_t sd_resp;
 307                 u_int8_t sd_len;
 308                 u_int8_t sd_sp2[2];
 309                 u_int8_t sd_support;
 310         } __attribute__((packed)) li_inq;
 311
 312         /* modeq buffer */
 313         struct scsi_low_mode_sense_data {
 314                 u_int8_t sms_header[4];
 315                 struct {
 316                         u_int8_t cmp_page;
 317                         u_int8_t cmp_length;
 318                         u_int8_t cmp_rlec;
 319                         u_int8_t cmp_qc;
 320                         u_int8_t cmp_eca;
 321                         u_int8_t cmp_spare[3];
 322                 } __attribute__((packed)) sms_cmp;
 323
 324         } li_sms;
 325 };
 326
 327 struct scsi_low_msg_log {
 328         int slml_ptr;
 329         struct {
 330                 u_int8_t msg[2];
 331         } slml_msg[SCSI_LOW_MSG_LOG_DATALEN];
 332 };
 333
 334 struct targ_info {
 335         struct scsi_low_osdep_targ_interface ti_slti;
 336
 337         TAILQ_ENTRY(targ_info) ti_chain;        /* targ_info link */
 338
 339         struct scsi_low_softc *ti_sc;           /* our softc */
 340         u_int ti_id;                            /* scsi id */
 341
 342         /*
 343          * Lun chain
 344          */
 345         struct lun_info_tab ti_litab;           /* lun chain */
 346
 347         /*
 348          * total disconnected nexus
 349          */
 350         int ti_disc;
 351
 352         /*
 353          * Scsi phase control
 354          */
 355
 356 #define PH_NULL         0x00
 357 #define PH_ARBSTART     0x01
 358 #define PH_SELSTART     0x02
 359 #define PH_SELECTED     0x03
 360 #define PH_CMD          0x04
 361 #define PH_DATA         0x05
 362 #define PH_MSGIN        0x06
 363 #define PH_MSGOUT       0x07
 364 #define PH_STAT         0x08
 365 #define PH_DISC         0x09
 366 #define PH_RESEL        0x0a
 367         u_int ti_phase;                         /* scsi phase */
 368         u_int ti_ophase;                        /* old scsi phase */
 369
 370         /*
 371          * Msg in
 372          */
 373         u_int ti_msginptr;                      /* msgin ptr */
 374         u_int ti_msginlen;                      /* expected msg length */
 375         int ti_msgin_parity_error;              /* parity error detected */
 376         u_int8_t ti_msgin[SCSI_LOW_MAX_MSGLEN]; /* msgin buffer */
 377
 378         /*
 379          * Msg out
 380          */
 381         u_int ti_msgflags;                      /* msgs to be asserted */
 382         u_int ti_omsgflags;                     /* msgs asserted */
 383         u_int ti_emsgflags;                     /* a msg currently asserted */
 384 #define SCSI_LOW_MSG_RESET      0x00000001
 385 #define SCSI_LOW_MSG_REJECT     0x00000002
 386 #define SCSI_LOW_MSG_PARITY     0x00000004
 387 #define SCSI_LOW_MSG_ERROR      0x00000008
 388 #define SCSI_LOW_MSG_IDENTIFY   0x00000010
 389 #define SCSI_LOW_MSG_ABORT      0x00000020
 390 #define SCSI_LOW_MSG_TERMIO     0x00000040
 391 #define SCSI_LOW_MSG_SIMPLE_QTAG        0x00000080
 392 #define SCSI_LOW_MSG_ORDERED_QTAG       0x00000100
 393 #define SCSI_LOW_MSG_HEAD_QTAG          0x00000200
 394 #define SCSI_LOW_MSG_ABORT_QTAG 0x00000400
 395 #define SCSI_LOW_MSG_CLEAR_QTAG 0x00000800
 396 #define SCSI_LOW_MSG_WIDE       0x00001000
 397 #define SCSI_LOW_MSG_SYNCH      0x00002000
 398 #define SCSI_LOW_MSG_NOOP       0x00004000
 399 #define SCSI_LOW_MSG_LAST       0x00008000
 400 #define SCSI_LOW_MSG_ALL        0xffffffff
 401
 402         /* msgout buffer */
 403         u_int8_t ti_msgoutstr[SCSI_LOW_MAX_MSGLEN];     /* scsi msgout */
 404         u_int ti_msgoutlen;                     /* msgout strlen */
 405
 406         /*
 407          * target initialize msgout
 408          */
 409         u_int ti_setup_msg;             /* setup msgout requests */
 410         u_int ti_setup_msg_done;
 411
 412         /*
 413          * synch and wide data info
 414          */
 415         u_int ti_flags_valid;   /* valid flags */
 416 #define SCSI_LOW_TARG_FLAGS_USER_VALID          0x0001
 417 #define SCSI_LOW_TARG_FLAGS_DISK_VALID          0x0002
 418 #define SCSI_LOW_TARG_FLAGS_QUIRKS_VALID        0x0004
 419 #define SCSI_LOW_TARG_FLAGS_ALL_VALID \
 420         (SCSI_LOW_TARG_FLAGS_USER_VALID | \
 421          SCSI_LOW_TARG_FLAGS_DISK_VALID | SCSI_LOW_TARG_FLAGS_QUIRKS_VALID)
 422
 423         u_int ti_diskflags;     /* given target disk flags */
 424         u_int ti_quirks;        /* given target quirk */
 425
 426         struct synch {
 427                 u_int8_t offset;
 428                 u_int8_t period;
 429         } ti_osynch, ti_maxsynch;               /* synch data */
 430
 431 #define SCSI_LOW_BUS_WIDTH_8    0
 432 #define SCSI_LOW_BUS_WIDTH_16   1
 433 #define SCSI_LOW_BUS_WIDTH_32   2
 434         u_int ti_owidth, ti_width;
 435
 436         /*
 437          * lun info size.
 438          */
 439         int ti_lunsize;
 440
 441 #ifdef  SCSI_LOW_DIAGNOSTIC
 442         struct scsi_low_msg_log ti_log_msgout;
 443         struct scsi_low_msg_log ti_log_msgin;
 444 #endif  /* SCSI_LOW_DIAGNOSTIC */
 445 };
 446
 447 /*************************************************
 448  * COMMON HEADER STRUCTURE
 449  *************************************************/
 450 struct scsi_low_softc;
 451 struct proc;
 452 typedef struct scsi_low_softc *sc_low_t;
 453
 454 #define SCSI_LOW_START_OK       0
 455 #define SCSI_LOW_START_FAIL     1
 456 #define SCSI_LOW_INFO_ALLOC     0
 457 #define SCSI_LOW_INFO_REVOKE    1
 458 #define SCSI_LOW_INFO_DEALLOC   2
 459 #define SCSI_LOW_POWDOWN        1
 460 #define SCSI_LOW_ENGAGE         2
 461
 462 #define SC_LOW_INIT_T (int (*) (sc_low_t, int))
 463 #define SC_LOW_BUSRST_T (void (*) (sc_low_t))
 464 #define SC_LOW_TARG_INIT_T (int (*) (sc_low_t, struct targ_info *, int))
 465 #define SC_LOW_LUN_INIT_T (int (*) (sc_low_t, struct targ_info *, struct lun_info *, int))
 466 #define SC_LOW_SELECT_T (int (*) (sc_low_t, struct slccb *))
 467 #define SC_LOW_ATTEN_T (void (*) (sc_low_t))
 468 #define SC_LOW_NEXUS_T (int (*) (sc_low_t))
 469 #define SC_LOW_MSG_T (int (*) (sc_low_t, struct targ_info *, u_int))
 470 #define SC_LOW_POLL_T (int (*) (void *))
 471 #define SC_LOW_POWER_T (int (*) (sc_low_t, u_int))
 472 #define SC_LOW_TIMEOUT_T (int (*) (sc_low_t))
 473
 474 struct scsi_low_funcs {
 475         int (*scsi_low_init) (sc_low_t, int);
 476         void (*scsi_low_bus_reset) (sc_low_t);
 477         int (*scsi_low_targ_init) (sc_low_t, struct targ_info *, int);
 478         int (*scsi_low_lun_init) (sc_low_t, struct targ_info *, struct lun_info *, int);
 479         int (*scsi_low_start_bus) (sc_low_t, struct slccb *);
 480         int (*scsi_low_establish_lun_nexus) (sc_low_t);
 481         int (*scsi_low_establish_ccb_nexus) (sc_low_t);
 482         void (*scsi_low_attention) (sc_low_t);
 483         int (*scsi_low_msg) (sc_low_t, struct targ_info *, u_int);
 484         int (*scsi_low_timeout) (sc_low_t);
 485         int (*scsi_low_poll) (void *);
 486         int (*scsi_low_power) (sc_low_t, u_int);
 487         int (*scsi_low_ioctl) (sc_low_t, u_long, caddr_t, int, struct proc *);
 488 };
 489
 490 struct scsi_low_softc {
 491         /* os depend structure */
 492         struct scsi_low_osdep_interface sl_si;
 493 #define sl_dev  sl_si.si_dev
 494         struct scsi_low_osdep_funcs *sl_osdep_fp;
 495         u_char sl_xname[16];
 496
 497         /* our chain */
 498         LIST_ENTRY(scsi_low_softc) sl_chain;
 499
 500         /* my targets */
 501         struct targ_info *sl_ti[SCSI_LOW_NTARGETS];
 502         struct targ_info_tab sl_titab;
 503
 504         /* current active T_L_Q nexus */
 505         struct targ_info *sl_Tnexus;            /* Target nexus */
 506         struct lun_info *sl_Lnexus;             /* Lun nexus */
 507         struct slccb *sl_Qnexus;                        /* Qtag nexus */
 508         int sl_nexus_call;
 509
 510         /* ccb start queue */
 511         struct slccbtab sl_start;
 512
 513         /* retry limit and phase change counter */
 514         int sl_max_retry;
 515         int sl_ph_count;
 516         int sl_timeout_count;
 517
 518         /* selection & total num disconnect targets */
 519         int sl_nio;
 520         int sl_disc;
 521         int sl_retry_sel;
 522         struct slccb *sl_selid;
 523
 524         /* attention */
 525         int sl_atten;                   /* ATN asserted */
 526         int sl_clear_atten;             /* negate ATN required */
 527
 528         /* scsi phase suggested by scsi msg */
 529         u_int sl_msgphase;
 530 #define MSGPH_NULL      0x00            /* no msg */
 531 #define MSGPH_DISC      0x01            /* disconnect msg */
 532 #define MSGPH_CMDC      0x02            /* cmd complete msg */
 533 #define MSGPH_ABORT     0x03            /* abort seq */
 534 #define MSGPH_TERM      0x04            /* current io terminate */
 535 #define MSGPH_LCTERM    0x05            /* cmd link terminated */
 536 #define MSGPH_RESET     0x06            /* reset target */
 537
 538         /* error */
 539         u_int sl_error;                 /* error flags */
 540 #define FATALIO         0x0001          /* generic io error & retry io */
 541 #define ABORTIO         0x0002          /* generic io error & terminate io */
 542 #define TIMEOUTIO       0x0004          /* watch dog timeout */
 543 #define SELTIMEOUTIO    0x0008          /* selection timeout */
 544 #define PDMAERR         0x0010          /* dma xfer error */
 545 #define MSGERR          0x0020          /* msgsys error */
 546 #define PARITYERR       0x0040          /* parity error */
 547 #define BUSYERR         0x0080          /* target busy error */
 548 #define STATERR         0x0100          /* status error */
 549 #define UACAERR         0x0200          /* target CA state, no sense check */
 550 #define SENSEIO         0x1000          /* cmd not excuted but sense data ok */
 551 #define SENSEERR        0x2000          /* cmd not excuted and sense data bad */
 552 #define UBFERR          0x4000          /* unexpected bus free */
 553 #define PENDINGIO       0x8000          /* ccb start not yet */
 554 #define SCSI_LOW_ERRORBITS "\020\017ubferr\016senseerr\015senseio\012uacaerr\011staterr\010busy\007parity\006msgerr\005pdmaerr\004seltimeout\003timeout\002abort\001fatal"
 555
 556         /* current scsi data pointer */
 557         struct sc_p sl_scp;
 558
 559         /* power control */
 560         u_int sl_active;                /* host is busy state */
 561         int sl_powc;                    /* power down timer counter */
 562         u_int sl_rstep;                 /* resume step */
 563
 564         /* configuration flags */
 565         u_int sl_flags;
 566 #define HW_POWDOWN      0x0001
 567 #define HW_RESUME       0x0002
 568 #define HW_PDMASTART    0x0004
 569 #define HW_INACTIVE     0x0008
 570 #define HW_POWERCTRL    0x0010
 571 #define HW_INITIALIZING 0x0020
 572 #define HW_READ_PADDING         0x1000
 573 #define HW_WRITE_PADDING        0x2000
 574
 575         u_int sl_cfgflags;
 576 #define CFG_NODISC              0x0001
 577 #define CFG_NOPARITY            0x0002
 578 #define CFG_NOATTEN             0x0004
 579 #define CFG_ASYNC               0x0008
 580 #define CFG_NOQTAG              0x0010
 581
 582         int sl_show_result;
 583 #define SHOW_SYNCH_NEG  0x0001
 584 #define SHOW_WIDE_NEG   0x0002
 585 #define SHOW_CALCF_RES  0x0010
 586 #define SHOW_PROBE_RES  0x0020
 587 #define SHOW_ALL_NEG    -1
 588
 589         /* host informations */
 590         u_int sl_hostid;
 591         int sl_nluns;
 592         int sl_ntargs;
 593         int sl_openings;
 594
 595         /* interface functions */
 596         struct scsi_low_funcs *sl_funcs;
 597
 598         /* targinfo size */
 599         int sl_targsize;
 600 };
 601
 602 /*************************************************
 603  * SCSI LOW service functions
 604  *************************************************/
 605 /*
 606  * Scsi low attachment function.
 607  */
 608 int scsi_low_attach (struct scsi_low_softc *, int, int, int, int, int);
 609 int scsi_low_dettach (struct scsi_low_softc *);
 610
 611 /*
 612  * Scsi low interface activate or deactivate functions
 613  */
 614 int scsi_low_is_busy (struct scsi_low_softc *);
 615 int scsi_low_activate (struct scsi_low_softc *);
 616 int scsi_low_deactivate (struct scsi_low_softc *);
 617
 618 /*
 619  * Scsi phase "bus service" functions.
 620  * These functions are corresponding to each scsi bus phaeses.
 621  */
 622 /* bus idle phase (other initiators or targets release bus) */
 623 void scsi_low_bus_idle (struct scsi_low_softc *);
 624
 625 /* arbitration and selection phase */
 626 void scsi_low_arbit_fail (struct scsi_low_softc *, struct slccb *);
 627 static __inline void scsi_low_arbit_win (struct scsi_low_softc *);
 628
 629 /* msgout phase */
 630 #define SCSI_LOW_MSGOUT_INIT            0x00000001
 631 #define SCSI_LOW_MSGOUT_UNIFY           0x00000002
 632 int scsi_low_msgout (struct scsi_low_softc *, struct targ_info *, u_int);
 633
 634 /* msgin phase */
 635 #define SCSI_LOW_DATA_PE        0x80000000
 636 int scsi_low_msgin (struct scsi_low_softc *, struct targ_info *, u_int);
 637
 638 /* statusin phase */
 639 static __inline int scsi_low_statusin (struct scsi_low_softc *, struct targ_info *, u_int);
 640
 641 /* data phase */
 642 int scsi_low_data (struct scsi_low_softc *, struct targ_info *, struct buf **, int);
 643 static __inline void scsi_low_data_finish (struct scsi_low_softc *);
 644
 645 /* cmd phase */
 646 int scsi_low_cmd (struct scsi_low_softc *, struct targ_info *);
 647
 648 /* reselection phase */
 649 struct targ_info *scsi_low_reselected (struct scsi_low_softc *, u_int);
 650
 651 /* disconnection phase */
 652 int scsi_low_disconnected (struct scsi_low_softc *, struct targ_info *);
 653
 654 /*
 655  * Scsi bus restart function.
 656  * Canncel all established nexuses => scsi system initialized => restart jobs.
 657  */
 658 #define SCSI_LOW_RESTART_HARD   1
 659 #define SCSI_LOW_RESTART_SOFT   0
 660 int scsi_low_restart (struct scsi_low_softc *, int, u_char *);
 661
 662 /*
 663  * Scsi utility fucntions
 664  */
 665 /* print current status */
 666 void scsi_low_print (struct scsi_low_softc *, struct targ_info *);
 667
 668 /* bus reset utility */
 669 void scsi_low_bus_reset (struct scsi_low_softc *);
 670
 671 /*************************************************
 672  * Message macro defs
 673  *************************************************/
 674 #define SCSI_LOW_SETUP_PHASE(ti, phase)                 \
 675 {                                                       \
 676         (ti)->ti_ophase = ti->ti_phase;                 \
 677         (ti)->ti_phase = (phase);                       \
 678 }
 679
 680 #define SCSI_LOW_SETUP_MSGPHASE(slp, PHASE)             \
 681 {                                                       \
 682         (slp)->sl_msgphase = (PHASE);                   \
 683 }
 684
 685 #define SCSI_LOW_ASSERT_ATN(slp)                        \
 686 {                                                       \
 687         (slp)->sl_atten = 1;                            \
 688 }
 689
 690 #define SCSI_LOW_DEASSERT_ATN(slp)                      \
 691 {                                                       \
 692         (slp)->sl_atten = 0;                            \
 693 }
 694
 695 /*************************************************
 696  * Inline functions
 697  *************************************************/
 698 static __inline void scsi_low_attention (struct scsi_low_softc *);
 699 static __inline int scsi_low_is_msgout_continue (struct targ_info *, u_int);
 700 static __inline int scsi_low_assert_msg (struct scsi_low_softc *, struct targ_info *, u_int, int);
 701 static __inline int scsi_low_is_disconnect_ok (struct slccb *);
 702
 703 static __inline int
 704 scsi_low_is_msgout_continue(struct targ_info *ti, u_int mask)
 705 {
 706         return ((ti->ti_msgflags & (~mask)) != 0);
 707 }
 708
 709 static __inline int
 710 scsi_low_is_disconnect_ok(struct slccb *cb)
 711 {
 712         return ((cb->li->li_flags & SCSI_LOW_DISC) != 0 &&
 713                     (cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) == 0);
 714 }
 715
 716 static __inline void
 717 scsi_low_attention(struct scsi_low_softc *slp)
 718 {
 719         if (slp->sl_atten != 0)
 720                 return;
 721
 722         (*slp->sl_funcs->scsi_low_attention) (slp);
 723         SCSI_LOW_ASSERT_ATN(slp);
 724 }
 725
 726 static __inline int
 727 scsi_low_assert_msg(struct scsi_low_softc *slp, struct targ_info *ti, u_int msg, int now)
 728 {
 729         ti->ti_msgflags |= msg;
 730         if (now != 0)
 731                 scsi_low_attention(slp);
 732         return 0;
 733 }
 734
 735 static __inline void
 736 scsi_low_arbit_win(struct scsi_low_softc *slp)
 737 {
 738         slp->sl_selid = NULL;
 739 }
 740
 741 static __inline void
 742 scsi_low_data_finish(struct scsi_low_softc *slp)
 743 {
 744         if (slp->sl_Qnexus != NULL)
 745         {
 746                 slp->sl_Qnexus->ccb_datalen = slp->sl_scp.scp_datalen;
 747         }
 748 }
 749
 750 static __inline int
 751 scsi_low_statusin(struct scsi_low_softc *slp, struct targ_info *ti, u_int c)
 752 {
 753         slp->sl_ph_count ++;
 754         if ((c & SCSI_LOW_DATA_PE) != 0)
 755         {
 756                 scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ERROR, 0);
 757                 return EIO;
 758         }
 759         slp->sl_scp.scp_status = (u_int8_t) c;
 760         return 0;
 761 }
 762
 763 /*************************************************
 764  * Message out defs
 765  *************************************************/
 766 /* XXX: use scsi_message.h */
 767 #define ST_GOOD         0x00
 768 #define ST_CHKCOND      0x02
 769 #define ST_MET          0x04
 770 #define ST_BUSY         0x08
 771 #define ST_INTERGOOD    0x10
 772 #define ST_INTERMET     0x14
 773 #define ST_CONFLICT     0x18
 774 #define ST_CMDTERM      0x22
 775 #define ST_QUEFULL      0x28
 776 #define ST_UNKNOWN      0xff
 777
 778 #define MSG_COMP        0x00
 779 #define MSG_EXTEND      0x01
 780
 781 #define MKMSG_EXTEND(XLEN, XCODE) ((((u_int)(XLEN)) << NBBY) | ((u_int)(XCODE)))
 782 #define MSG_EXTEND_MDPCODE      0x00
 783 #define MSG_EXTEND_MDPLEN       0x05
 784 #define MSG_EXTEND_SYNCHCODE    0x01
 785 #define MSG_EXTEND_SYNCHLEN     0x03
 786 #define MSG_EXTEND_WIDECODE     0x03
 787 #define MSG_EXTEND_WIDELEN      0x02
 788
 789 #define MSG_SAVESP      0x02
 790 #define MSG_RESTORESP   0x03
 791 #define MSG_DISCON      0x04
 792 #define MSG_I_ERROR     0x05
 793 #define MSG_ABORT       0x06
 794 #define MSG_REJECT      0x07
 795 #define MSG_NOOP        0x08
 796 #define MSG_PARITY      0x09
 797 #define MSG_LCOMP       0x0a
 798 #define MSG_LCOMP_F     0x0b
 799 #define MSG_RESET       0x0c
 800 #define MSG_ABORT_QTAG  0x0d
 801 #define MSG_CLEAR_QTAG  0x0e
 802 #define MSG_TERM_IO     0x11
 803 #define MSG_SIMPLE_QTAG 0x20
 804 #define MSG_HEAD_QTAG   0x21
 805 #define MSG_ORDERED_QTAG        0x22
 806 #define MSG_IDENTIFY            0x80
 807 #define MSG_IDENTIFY_DISCPRIV   0x40
 808 #endif  /* !_SCSI_LOW_H_ */