sys/cam/scsi/scsi_sa.c

   1 /*-
   2  * Implementation of SCSI Sequential Access Peripheral driver for CAM.
   3  *
   4  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   5  *
   6  * Copyright (c) 1999, 2000 Matthew Jacob
   7  * Copyright (c) 2013, 2014, 2015 Spectra Logic Corporation
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include <sys/param.h>
  36 #include <sys/queue.h>
  37 #ifdef _KERNEL
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/time.h>
  43 #include <sys/bio.h>
  44 #include <sys/limits.h>
  45 #include <sys/malloc.h>
  46 #include <sys/mtio.h>
  47 #ifdef _KERNEL
  48 #include <sys/conf.h>
  49 #include <sys/sbuf.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/taskqueue.h>
  52 #endif
  53 #include <sys/fcntl.h>
  54 #include <sys/devicestat.h>
  55
  56 #ifndef _KERNEL
  57 #include <stdio.h>
  58 #include <string.h>
  59 #endif
  60
  61 #include <cam/cam.h>
  62 #include <cam/cam_ccb.h>
  63 #include <cam/cam_periph.h>
  64 #include <cam/cam_xpt_periph.h>
  65 #include <cam/cam_debug.h>
  66
  67 #include <cam/scsi/scsi_all.h>
  68 #include <cam/scsi/scsi_message.h>
  69 #include <cam/scsi/scsi_sa.h>
  70
  71 #ifdef _KERNEL
  72
  73 #include "opt_sa.h"
  74
  75 #ifndef SA_IO_TIMEOUT
  76 #define SA_IO_TIMEOUT           32
  77 #endif
  78 #ifndef SA_SPACE_TIMEOUT
  79 #define SA_SPACE_TIMEOUT        1 * 60
  80 #endif
  81 #ifndef SA_REWIND_TIMEOUT
  82 #define SA_REWIND_TIMEOUT       2 * 60
  83 #endif
  84 #ifndef SA_ERASE_TIMEOUT
  85 #define SA_ERASE_TIMEOUT        4 * 60
  86 #endif
  87 #ifndef SA_REP_DENSITY_TIMEOUT
  88 #define SA_REP_DENSITY_TIMEOUT  90
  89 #endif
  90
  91 #define SCSIOP_TIMEOUT          (60 * 1000)     /* not an option */
  92
  93 #define IO_TIMEOUT              (SA_IO_TIMEOUT * 60 * 1000)
  94 #define REWIND_TIMEOUT          (SA_REWIND_TIMEOUT * 60 * 1000)
  95 #define ERASE_TIMEOUT           (SA_ERASE_TIMEOUT * 60 * 1000)
  96 #define SPACE_TIMEOUT           (SA_SPACE_TIMEOUT * 60 * 1000)
  97 #define REP_DENSITY_TIMEOUT     (SA_REP_DENSITY_TIMEOUT * 60 * 1000)
  98
  99 /*
 100  * Additional options that can be set for config: SA_1FM_AT_EOT
 101  */
 102
 103 #ifndef UNUSED_PARAMETER
 104 #define UNUSED_PARAMETER(x)     x = x
 105 #endif
 106
 107 #define QFRLS(ccb)      \
 108         if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
 109                 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
 110
 111 /*
 112  * Driver states
 113  */
 114
 115 static MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
 116
 117 typedef enum {
 118         SA_STATE_NORMAL, SA_STATE_ABNORMAL
 119 } sa_state;
 120
 121 #define ccb_pflags      ppriv_field0
 122 #define ccb_bp          ppriv_ptr1
 123
 124 /* bits in ccb_pflags */
 125 #define SA_POSITION_UPDATED     0x1
 126
 127
 128 typedef enum {
 129         SA_FLAG_OPEN            = 0x0001,
 130         SA_FLAG_FIXED           = 0x0002,
 131         SA_FLAG_TAPE_LOCKED     = 0x0004,
 132         SA_FLAG_TAPE_MOUNTED    = 0x0008,
 133         SA_FLAG_TAPE_WP         = 0x0010,
 134         SA_FLAG_TAPE_WRITTEN    = 0x0020,
 135         SA_FLAG_EOM_PENDING     = 0x0040,
 136         SA_FLAG_EIO_PENDING     = 0x0080,
 137         SA_FLAG_EOF_PENDING     = 0x0100,
 138         SA_FLAG_ERR_PENDING     = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
 139                                    SA_FLAG_EOF_PENDING),
 140         SA_FLAG_INVALID         = 0x0200,
 141         SA_FLAG_COMP_ENABLED    = 0x0400,
 142         SA_FLAG_COMP_SUPP       = 0x0800,
 143         SA_FLAG_COMP_UNSUPP     = 0x1000,
 144         SA_FLAG_TAPE_FROZEN     = 0x2000,
 145         SA_FLAG_PROTECT_SUPP    = 0x4000,
 146
 147         SA_FLAG_COMPRESSION     = (SA_FLAG_COMP_SUPP|SA_FLAG_COMP_ENABLED|
 148                                    SA_FLAG_COMP_UNSUPP),
 149         SA_FLAG_SCTX_INIT       = 0x8000
 150 } sa_flags;
 151
 152 typedef enum {
 153         SA_MODE_REWIND          = 0x00,
 154         SA_MODE_NOREWIND        = 0x01,
 155         SA_MODE_OFFLINE         = 0x02
 156 } sa_mode;
 157
 158 typedef enum {
 159         SA_PARAM_NONE           = 0x000,
 160         SA_PARAM_BLOCKSIZE      = 0x001,
 161         SA_PARAM_DENSITY        = 0x002,
 162         SA_PARAM_COMPRESSION    = 0x004,
 163         SA_PARAM_BUFF_MODE      = 0x008,
 164         SA_PARAM_NUMBLOCKS      = 0x010,
 165         SA_PARAM_WP             = 0x020,
 166         SA_PARAM_SPEED          = 0x040,
 167         SA_PARAM_DENSITY_EXT    = 0x080,
 168         SA_PARAM_LBP            = 0x100,
 169         SA_PARAM_ALL            = 0x1ff
 170 } sa_params;
 171
 172 typedef enum {
 173         SA_QUIRK_NONE           = 0x000,
 174         SA_QUIRK_NOCOMP         = 0x001, /* Can't deal with compression at all*/
 175         SA_QUIRK_FIXED          = 0x002, /* Force fixed mode */
 176         SA_QUIRK_VARIABLE       = 0x004, /* Force variable mode */
 177         SA_QUIRK_2FM            = 0x008, /* Needs Two File Marks at EOD */
 178         SA_QUIRK_1FM            = 0x010, /* No more than 1 File Mark at EOD */
 179         SA_QUIRK_NODREAD        = 0x020, /* Don't try and dummy read density */
 180         SA_QUIRK_NO_MODESEL     = 0x040, /* Don't do mode select at all */
 181         SA_QUIRK_NO_CPAGE       = 0x080, /* Don't use DEVICE COMPRESSION page */
 182         SA_QUIRK_NO_LONG_POS    = 0x100  /* No long position information */
 183 } sa_quirks;
 184
 185 #define SA_QUIRK_BIT_STRING     \
 186         "\020"                  \
 187         "\001NOCOMP"            \
 188         "\002FIXED"             \
 189         "\003VARIABLE"          \
 190         "\0042FM"               \
 191         "\0051FM"               \
 192         "\006NODREAD"           \
 193         "\007NO_MODESEL"        \
 194         "\010NO_CPAGE"          \
 195         "\011NO_LONG_POS"
 196
 197 #define SAMODE(z)       (dev2unit(z) & 0x3)
 198 #define SA_IS_CTRL(z)   (dev2unit(z) & (1 << 4))
 199
 200 #define SA_NOT_CTLDEV   0
 201 #define SA_CTLDEV       1
 202
 203 #define SA_ATYPE_R      0
 204 #define SA_ATYPE_NR     1
 205 #define SA_ATYPE_ER     2
 206 #define SA_NUM_ATYPES   3
 207
 208 #define SAMINOR(ctl, access) \
 209         ((ctl << 4) | (access & 0x3))
 210
 211 struct sa_devs {
 212         struct cdev *ctl_dev;
 213         struct cdev *r_dev;
 214         struct cdev *nr_dev;
 215         struct cdev *er_dev;
 216 };
 217
 218 #define SASBADDBASE(sb, indent, data, xfmt, name, type, xsize, desc)    \
 219         sbuf_printf(sb, "%*s<%s type=\"%s\" size=\"%zd\" "              \
 220             "fmt=\"%s\" desc=\"%s\">" #xfmt "</%s>\n", indent, "",      \
 221             #name, #type, xsize, #xfmt, desc ? desc : "", data, #name);
 222
 223 #define SASBADDINT(sb, indent, data, fmt, name)                         \
 224         SASBADDBASE(sb, indent, data, fmt, name, int, sizeof(data),     \
 225                     NULL)
 226
 227 #define SASBADDINTDESC(sb, indent, data, fmt, name, desc)               \
 228         SASBADDBASE(sb, indent, data, fmt, name, int, sizeof(data),     \
 229                     desc)
 230
 231 #define SASBADDUINT(sb, indent, data, fmt, name)                        \
 232         SASBADDBASE(sb, indent, data, fmt, name, uint, sizeof(data),    \
 233                     NULL)
 234
 235 #define SASBADDUINTDESC(sb, indent, data, fmt, name, desc)              \
 236         SASBADDBASE(sb, indent, data, fmt, name, uint, sizeof(data),    \
 237                     desc)
 238
 239 #define SASBADDFIXEDSTR(sb, indent, data, fmt, name)                    \
 240         SASBADDBASE(sb, indent, data, fmt, name, str, sizeof(data),     \
 241                     NULL)
 242
 243 #define SASBADDFIXEDSTRDESC(sb, indent, data, fmt, name, desc)          \
 244         SASBADDBASE(sb, indent, data, fmt, name, str, sizeof(data),     \
 245                     desc)
 246
 247 #define SASBADDVARSTR(sb, indent, data, fmt, name, maxlen)              \
 248         SASBADDBASE(sb, indent, data, fmt, name, str, maxlen, NULL)
 249
 250 #define SASBADDVARSTRDESC(sb, indent, data, fmt, name, maxlen, desc)    \
 251         SASBADDBASE(sb, indent, data, fmt, name, str, maxlen, desc)
 252
 253 #define SASBADDNODE(sb, indent, name) {                                 \
 254         sbuf_printf(sb, "%*s<%s type=\"%s\">\n", indent, "", #name,     \
 255             "node");                                                    \
 256         indent += 2;                                                    \
 257 }
 258
 259 #define SASBADDNODENUM(sb, indent, name, num) {                         \
 260         sbuf_printf(sb, "%*s<%s type=\"%s\" num=\"%d\">\n", indent, "", \
 261             #name, "node", num);                                        \
 262         indent += 2;                                                    \
 263 }
 264
 265 #define SASBENDNODE(sb, indent, name) {                                 \
 266         indent -= 2;                                                    \
 267         sbuf_printf(sb, "%*s</%s>\n", indent, "", #name);               \
 268 }
 269
 270 #define SA_DENSITY_TYPES        4
 271
 272 struct sa_prot_state {
 273         int initialized;
 274         uint32_t prot_method;
 275         uint32_t pi_length;
 276         uint32_t lbp_w;
 277         uint32_t lbp_r;
 278         uint32_t rbdp;
 279 };
 280
 281 struct sa_prot_info {
 282         struct sa_prot_state cur_prot_state;
 283         struct sa_prot_state pending_prot_state;
 284 };
 285
 286 /*
 287  * A table mapping protection parameters to their types and values.
 288  */
 289 struct sa_prot_map {
 290         char *name;
 291         mt_param_set_type param_type;
 292         off_t offset;
 293         uint32_t min_val;
 294         uint32_t max_val;
 295         uint32_t *value;
 296 } sa_prot_table[] = {
 297         { "prot_method", MT_PARAM_SET_UNSIGNED,
 298           __offsetof(struct sa_prot_state, prot_method),
 299           /*min_val*/ 0, /*max_val*/ 255, NULL },
 300         { "pi_length", MT_PARAM_SET_UNSIGNED,
 301           __offsetof(struct sa_prot_state, pi_length),
 302           /*min_val*/ 0, /*max_val*/ SA_CTRL_DP_PI_LENGTH_MASK, NULL },
 303         { "lbp_w", MT_PARAM_SET_UNSIGNED,
 304           __offsetof(struct sa_prot_state, lbp_w),
 305           /*min_val*/ 0, /*max_val*/ 1, NULL },
 306         { "lbp_r", MT_PARAM_SET_UNSIGNED,
 307           __offsetof(struct sa_prot_state, lbp_r),
 308           /*min_val*/ 0, /*max_val*/ 1, NULL },
 309         { "rbdp", MT_PARAM_SET_UNSIGNED,
 310           __offsetof(struct sa_prot_state, rbdp),
 311           /*min_val*/ 0, /*max_val*/ 1, NULL }
 312 };
 313
 314 #define SA_NUM_PROT_ENTS nitems(sa_prot_table)
 315
 316 #define SA_PROT_ENABLED(softc) ((softc->flags & SA_FLAG_PROTECT_SUPP)   \
 317         && (softc->prot_info.cur_prot_state.initialized != 0)           \
 318         && (softc->prot_info.cur_prot_state.prot_method != 0))
 319
 320 #define SA_PROT_LEN(softc)      softc->prot_info.cur_prot_state.pi_length
 321
 322 struct sa_softc {
 323         sa_state        state;
 324         sa_flags        flags;
 325         sa_quirks       quirks;
 326         u_int           si_flags;
 327         struct cam_periph *periph;
 328         struct          bio_queue_head bio_queue;
 329         int             queue_count;
 330         struct          devstat *device_stats;
 331         struct sa_devs  devs;
 332         int             open_count;
 333         int             num_devs_to_destroy;
 334         int             blk_gran;
 335         int             blk_mask;
 336         int             blk_shift;
 337         u_int32_t       max_blk;
 338         u_int32_t       min_blk;
 339         u_int32_t       maxio;
 340         u_int32_t       cpi_maxio;
 341         int             allow_io_split;
 342         int             inject_eom;
 343         int             set_pews_status;
 344         u_int32_t       comp_algorithm;
 345         u_int32_t       saved_comp_algorithm;
 346         u_int32_t       media_blksize;
 347         u_int32_t       last_media_blksize;
 348         u_int32_t       media_numblks;
 349         u_int8_t        media_density;
 350         u_int8_t        speed;
 351         u_int8_t        scsi_rev;
 352         u_int8_t        dsreg;          /* mtio mt_dsreg, redux */
 353         int             buffer_mode;
 354         int             filemarks;
 355         union           ccb saved_ccb;
 356         int             last_resid_was_io;
 357         uint8_t         density_type_bits[SA_DENSITY_TYPES];
 358         int             density_info_valid[SA_DENSITY_TYPES];
 359         uint8_t         density_info[SA_DENSITY_TYPES][SRDS_MAX_LENGTH];
 360
 361         struct sa_prot_info     prot_info;
 362
 363         int             sili;
 364         int             eot_warn;
 365
 366         /*
 367          * Current position information.  -1 means that the given value is
 368          * unknown.  fileno and blkno are always calculated.  blkno is
 369          * relative to the previous file mark.  rep_fileno and rep_blkno
 370          * are as reported by the drive, if it supports the long form
 371          * report for the READ POSITION command.  rep_blkno is relative to
 372          * the beginning of the partition.
 373          *
 374          * bop means that the drive is at the beginning of the partition.
 375          * eop means that the drive is between early warning and end of
 376          * partition, inside the current partition.
 377          * bpew means that the position is in a PEWZ (Programmable Early
 378          * Warning Zone)
 379          */
 380         daddr_t         partition;      /* Absolute from BOT */
 381         daddr_t         fileno;         /* Relative to beginning of partition */
 382         daddr_t         blkno;          /* Relative to last file mark */
 383         daddr_t         rep_blkno;      /* Relative to beginning of partition */
 384         daddr_t         rep_fileno;     /* Relative to beginning of partition */
 385         int             bop;            /* Beginning of Partition */
 386         int             eop;            /* End of Partition */
 387         int             bpew;           /* Beyond Programmable Early Warning */
 388
 389         /*
 390          * Latched Error Info
 391          */
 392         struct {
 393                 struct scsi_sense_data _last_io_sense;
 394                 u_int64_t _last_io_resid;
 395                 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
 396                 struct scsi_sense_data _last_ctl_sense;
 397                 u_int64_t _last_ctl_resid;
 398                 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
 399 #define last_io_sense   errinfo._last_io_sense
 400 #define last_io_resid   errinfo._last_io_resid
 401 #define last_io_cdb     errinfo._last_io_cdb
 402 #define last_ctl_sense  errinfo._last_ctl_sense
 403 #define last_ctl_resid  errinfo._last_ctl_resid
 404 #define last_ctl_cdb    errinfo._last_ctl_cdb
 405         } errinfo;
 406         /*
 407          * Misc other flags/state
 408          */
 409         u_int32_t
 410                                         : 29,
 411                 open_rdonly             : 1,    /* open read-only */
 412                 open_pending_mount      : 1,    /* open pending mount */
 413                 ctrl_mode               : 1;    /* control device open */
 414
 415         struct task             sysctl_task;
 416         struct sysctl_ctx_list  sysctl_ctx;
 417         struct sysctl_oid       *sysctl_tree;
 418 };
 419
 420 struct sa_quirk_entry {
 421         struct scsi_inquiry_pattern inq_pat;    /* matching pattern */
 422         sa_quirks quirks;       /* specific quirk type */
 423         u_int32_t prefblk;      /* preferred blocksize when in fixed mode */
 424 };
 425
 426 static struct sa_quirk_entry sa_quirk_table[] =
 427 {
 428         {
 429                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
 430                   "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
 431                    SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
 432         },
 433         {
 434                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 435                   "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
 436         },
 437         {
 438                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 439                   "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
 440         },
 441         {
 442                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 443                   "Python*", "*"}, SA_QUIRK_NODREAD, 0
 444         },
 445         {
 446                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 447                   "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 448         },
 449         {
 450                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 451                   "VIPER 2525 25462", "-011"},
 452                   SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
 453         },
 454         {
 455                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 456                   "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 457         },
 458 #if     0
 459         {
 460                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 461                   "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
 462         },
 463 #endif
 464         {
 465                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 466                   "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 467         },
 468         {
 469                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 470                   "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 471         },
 472         {
 473                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 474                   "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 475         },
 476         {
 477                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 478                   "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 479         },
 480         {
 481                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 482                   "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 483         },
 484         {
 485                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
 486                   "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 487         },
 488         {       /* jreynold@primenet.com */
 489                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 490                 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
 491         },
 492         {       /* mike@sentex.net */
 493                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 494                 "STT20000*", "*"}, SA_QUIRK_1FM, 0
 495         },
 496         {
 497                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "SEAGATE",
 498                 "DAT    06241-XXX", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 499         },
 500         {
 501                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 502                   " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 503         },
 504         {
 505                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 506                   " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 507         },
 508         {
 509                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 510                   " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 511         },
 512         {
 513                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 514                   " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 515         },
 516         {
 517                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 518                   " SLR*", "*"}, SA_QUIRK_1FM, 0
 519         },
 520         {
 521                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 522                   "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 523         },
 524         {
 525                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 526                   "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 527         }
 528 };
 529
 530 static  d_open_t        saopen;
 531 static  d_close_t       saclose;
 532 static  d_strategy_t    sastrategy;
 533 static  d_ioctl_t       saioctl;
 534 static  periph_init_t   sainit;
 535 static  periph_ctor_t   saregister;
 536 static  periph_oninv_t  saoninvalidate;
 537 static  periph_dtor_t   sacleanup;
 538 static  periph_start_t  sastart;
 539 static  void            saasync(void *callback_arg, u_int32_t code,
 540                                 struct cam_path *path, void *arg);
 541 static  void            sadone(struct cam_periph *periph,
 542                                union ccb *start_ccb);
 543 static  int             saerror(union ccb *ccb, u_int32_t cam_flags,
 544                                 u_int32_t sense_flags);
 545 static int              samarkswanted(struct cam_periph *);
 546 static int              sacheckeod(struct cam_periph *periph);
 547 static int              sagetparams(struct cam_periph *periph,
 548                                     sa_params params_to_get,
 549                                     u_int32_t *blocksize, u_int8_t *density,
 550                                     u_int32_t *numblocks, int *buff_mode,
 551                                     u_int8_t *write_protect, u_int8_t *speed,
 552                                     int *comp_supported, int *comp_enabled,
 553                                     u_int32_t *comp_algorithm,
 554                                     sa_comp_t *comp_page,
 555                                     struct scsi_control_data_prot_subpage
 556                                     *prot_page, int dp_size,
 557                                     int prot_changeable);
 558 static int              sasetprot(struct cam_periph *periph,
 559                                   struct sa_prot_state *new_prot);
 560 static int              sasetparams(struct cam_periph *periph,
 561                                     sa_params params_to_set,
 562                                     u_int32_t blocksize, u_int8_t density,
 563                                     u_int32_t comp_algorithm,
 564                                     u_int32_t sense_flags);
 565 static int              sasetsili(struct cam_periph *periph,
 566                                   struct mtparamset *ps, int num_params);
 567 static int              saseteotwarn(struct cam_periph *periph,
 568                                      struct mtparamset *ps, int num_params);
 569 static void             safillprot(struct sa_softc *softc, int *indent,
 570                                    struct sbuf *sb);
 571 static void             sapopulateprots(struct sa_prot_state *cur_state,
 572                                         struct sa_prot_map *new_table,
 573                                         int table_ents);
 574 static struct sa_prot_map *safindprotent(char *name, struct sa_prot_map *table,
 575                                          int table_ents);
 576 static int              sasetprotents(struct cam_periph *periph,
 577                                       struct mtparamset *ps, int num_params);
 578 static struct sa_param_ent *safindparament(struct mtparamset *ps);
 579 static int              saparamsetlist(struct cam_periph *periph,
 580                                        struct mtsetlist *list, int need_copy);
 581 static  int             saextget(struct cdev *dev, struct cam_periph *periph,
 582                                  struct sbuf *sb, struct mtextget *g);
 583 static  int             saparamget(struct sa_softc *softc, struct sbuf *sb);
 584 static void             saprevent(struct cam_periph *periph, int action);
 585 static int              sarewind(struct cam_periph *periph);
 586 static int              saspace(struct cam_periph *periph, int count,
 587                                 scsi_space_code code);
 588 static void             sadevgonecb(void *arg);
 589 static void             sasetupdev(struct sa_softc *softc, struct cdev *dev);
 590 static int              samount(struct cam_periph *, int, struct cdev *);
 591 static int              saretension(struct cam_periph *periph);
 592 static int              sareservereleaseunit(struct cam_periph *periph,
 593                                              int reserve);
 594 static int              saloadunload(struct cam_periph *periph, int load);
 595 static int              saerase(struct cam_periph *periph, int longerase);
 596 static int              sawritefilemarks(struct cam_periph *periph,
 597                                          int nmarks, int setmarks, int immed);
 598 static int              sagetpos(struct cam_periph *periph);
 599 static int              sardpos(struct cam_periph *periph, int, u_int32_t *);
 600 static int              sasetpos(struct cam_periph *periph, int,
 601                                  struct mtlocate *);
 602 static void             safilldenstypesb(struct sbuf *sb, int *indent,
 603                                          uint8_t *buf, int buf_len,
 604                                          int is_density);
 605 static void             safilldensitysb(struct sa_softc *softc, int *indent,
 606                                         struct sbuf *sb);
 607
 608
 609 #ifndef SA_DEFAULT_IO_SPLIT
 610 #define SA_DEFAULT_IO_SPLIT     0
 611 #endif
 612
 613 static int sa_allow_io_split = SA_DEFAULT_IO_SPLIT;
 614
 615 /*
 616  * Tunable to allow the user to set a global allow_io_split value.  Note
 617  * that this WILL GO AWAY in FreeBSD 11.0.  Silently splitting the I/O up
 618  * is bad behavior, because it hides the true tape block size from the
 619  * application.
 620  */
 621 static SYSCTL_NODE(_kern_cam, OID_AUTO, sa, CTLFLAG_RD, 0,
 622                   "CAM Sequential Access Tape Driver");
 623 SYSCTL_INT(_kern_cam_sa, OID_AUTO, allow_io_split, CTLFLAG_RDTUN,
 624     &sa_allow_io_split, 0, "Default I/O split value");
 625
 626 static struct periph_driver sadriver =
 627 {
 628         sainit, "sa",
 629         TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
 630 };
 631
 632 PERIPHDRIVER_DECLARE(sa, sadriver);
 633
 634 /* For 2.2-stable support */
 635 #ifndef D_TAPE
 636 #define D_TAPE 0
 637 #endif
 638
 639
 640 static struct cdevsw sa_cdevsw = {
 641         .d_version =    D_VERSION,
 642         .d_open =       saopen,
 643         .d_close =      saclose,
 644         .d_read =       physread,
 645         .d_write =      physwrite,
 646         .d_ioctl =      saioctl,
 647         .d_strategy =   sastrategy,
 648         .d_name =       "sa",
 649         .d_flags =      D_TAPE | D_TRACKCLOSE,
 650 };
 651
 652 static int
 653 saopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 654 {
 655         struct cam_periph *periph;
 656         struct sa_softc *softc;
 657         int error;
 658
 659         periph = (struct cam_periph *)dev->si_drv1;
 660         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 661                 return (ENXIO);
 662         }
 663
 664         cam_periph_lock(periph);
 665
 666         softc = (struct sa_softc *)periph->softc;
 667
 668         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 669             ("saopen(%s): softc=0x%x\n", devtoname(dev), softc->flags));
 670
 671         if (SA_IS_CTRL(dev)) {
 672                 softc->ctrl_mode = 1;
 673                 softc->open_count++;
 674                 cam_periph_unlock(periph);
 675                 return (0);
 676         }
 677
 678         if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
 679                 cam_periph_unlock(periph);
 680                 cam_periph_release(periph);
 681                 return (error);
 682         }
 683
 684         if (softc->flags & SA_FLAG_OPEN) {
 685                 error = EBUSY;
 686         } else if (softc->flags & SA_FLAG_INVALID) {
 687                 error = ENXIO;
 688         } else {
 689                 /*
 690                  * Preserve whether this is a read_only open.
 691                  */
 692                 softc->open_rdonly = (flags & O_RDWR) == O_RDONLY;
 693
 694                 /*
 695                  * The function samount ensures media is loaded and ready.
 696                  * It also does a device RESERVE if the tape isn't yet mounted.
 697                  *
 698                  * If the mount fails and this was a non-blocking open,
 699                  * make this a 'open_pending_mount' action.
 700                  */
 701                 error = samount(periph, flags, dev);
 702                 if (error && (flags & O_NONBLOCK)) {
 703                         softc->flags |= SA_FLAG_OPEN;
 704                         softc->open_pending_mount = 1;
 705                         softc->open_count++;
 706                         cam_periph_unhold(periph);
 707                         cam_periph_unlock(periph);
 708                         return (0);
 709                 }
 710         }
 711
 712         if (error) {
 713                 cam_periph_unhold(periph);
 714                 cam_periph_unlock(periph);
 715                 cam_periph_release(periph);
 716                 return (error);
 717         }
 718
 719         saprevent(periph, PR_PREVENT);
 720         softc->flags |= SA_FLAG_OPEN;
 721         softc->open_count++;
 722
 723         cam_periph_unhold(periph);
 724         cam_periph_unlock(periph);
 725         return (error);
 726 }
 727
 728 static int
 729 saclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 730 {
 731         struct  cam_periph *periph;
 732         struct  sa_softc *softc;
 733         int     mode, error, writing, tmp, i;
 734         int     closedbits = SA_FLAG_OPEN;
 735
 736         mode = SAMODE(dev);
 737         periph = (struct cam_periph *)dev->si_drv1;
 738         cam_periph_lock(periph);
 739
 740         softc = (struct sa_softc *)periph->softc;
 741
 742         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 743             ("saclose(%s): softc=0x%x\n", devtoname(dev), softc->flags));
 744
 745
 746         softc->open_rdonly = 0;
 747         if (SA_IS_CTRL(dev)) {
 748                 softc->ctrl_mode = 0;
 749                 softc->open_count--;
 750                 cam_periph_unlock(periph);
 751                 cam_periph_release(periph);
 752                 return (0);
 753         }
 754
 755         if (softc->open_pending_mount) {
 756                 softc->flags &= ~SA_FLAG_OPEN;
 757                 softc->open_pending_mount = 0;
 758                 softc->open_count--;
 759                 cam_periph_unlock(periph);
 760                 cam_periph_release(periph);
 761                 return (0);
 762         }
 763
 764         if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
 765                 cam_periph_unlock(periph);
 766                 return (error);
 767         }
 768
 769         /*
 770          * Were we writing the tape?
 771          */
 772         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 773
 774         /*
 775          * See whether or not we need to write filemarks. If this
 776          * fails, we probably have to assume we've lost tape
 777          * position.
 778          */
 779         error = sacheckeod(periph);
 780         if (error) {
 781                 xpt_print(periph->path,
 782                     "failed to write terminating filemark(s)\n");
 783                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 784         }
 785
 786         /*
 787          * Whatever we end up doing, allow users to eject tapes from here on.
 788          */
 789         saprevent(periph, PR_ALLOW);
 790
 791         /*
 792          * Decide how to end...
 793          */
 794         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 795                 closedbits |= SA_FLAG_TAPE_FROZEN;
 796         } else switch (mode) {
 797         case SA_MODE_OFFLINE:
 798                 /*
 799                  * An 'offline' close is an unconditional release of
 800                  * frozen && mount conditions, irrespective of whether
 801                  * these operations succeeded. The reason for this is
 802                  * to allow at least some kind of programmatic way
 803                  * around our state getting all fouled up. If somebody
 804                  * issues an 'offline' command, that will be allowed
 805                  * to clear state.
 806                  */
 807                 (void) sarewind(periph);
 808                 (void) saloadunload(periph, FALSE);
 809                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 810                 break;
 811         case SA_MODE_REWIND:
 812                 /*
 813                  * If the rewind fails, return an error- if anyone cares,
 814                  * but not overwriting any previous error.
 815                  *
 816                  * We don't clear the notion of mounted here, but we do
 817                  * clear the notion of frozen if we successfully rewound.
 818                  */
 819                 tmp = sarewind(periph);
 820                 if (tmp) {
 821                         if (error != 0)
 822                                 error = tmp;
 823                 } else {
 824                         closedbits |= SA_FLAG_TAPE_FROZEN;
 825                 }
 826                 break;
 827         case SA_MODE_NOREWIND:
 828                 /*
 829                  * If we're not rewinding/unloading the tape, find out
 830                  * whether we need to back up over one of two filemarks
 831                  * we wrote (if we wrote two filemarks) so that appends
 832                  * from this point on will be sane.
 833                  */
 834                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 835                         tmp = saspace(periph, -1, SS_FILEMARKS);
 836                         if (tmp) {
 837                                 xpt_print(periph->path, "unable to backspace "
 838                                     "over one of double filemarks at end of "
 839                                     "tape\n");
 840                                 xpt_print(periph->path, "it is possible that "
 841                                     "this device needs a SA_QUIRK_1FM quirk set"
 842                                     "for it\n");
 843                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 844                         }
 845                 }
 846                 break;
 847         default:
 848                 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
 849                 /* NOTREACHED */
 850                 break;
 851         }
 852
 853         /*
 854          * We wish to note here that there are no more filemarks to be written.
 855          */
 856         softc->filemarks = 0;
 857         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 858
 859         /*
 860          * And we are no longer open for business.
 861          */
 862         softc->flags &= ~closedbits;
 863         softc->open_count--;
 864
 865         /*
 866          * Invalidate any density information that depends on having tape
 867          * media in the drive.
 868          */
 869         for (i = 0; i < SA_DENSITY_TYPES; i++) {
 870                 if (softc->density_type_bits[i] & SRDS_MEDIA)
 871                         softc->density_info_valid[i] = 0;
 872         }
 873
 874         /*
 875          * Inform users if tape state if frozen....
 876          */
 877         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 878                 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
 879                     "REWIND or MTEOM command to clear this state.\n");
 880         }
 881
 882         /* release the device if it is no longer mounted */
 883         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 884                 sareservereleaseunit(periph, FALSE);
 885
 886         cam_periph_unhold(periph);
 887         cam_periph_unlock(periph);
 888         cam_periph_release(periph);
 889
 890         return (error);
 891 }
 892
 893 /*
 894  * Actually translate the requested transfer into one the physical driver
 895  * can understand.  The transfer is described by a buf and will include
 896  * only one physical transfer.
 897  */
 898 static void
 899 sastrategy(struct bio *bp)
 900 {
 901         struct cam_periph *periph;
 902         struct sa_softc *softc;
 903
 904         bp->bio_resid = bp->bio_bcount;
 905         if (SA_IS_CTRL(bp->bio_dev)) {
 906                 biofinish(bp, NULL, EINVAL);
 907                 return;
 908         }
 909         periph = (struct cam_periph *)bp->bio_dev->si_drv1;
 910         cam_periph_lock(periph);
 911
 912         softc = (struct sa_softc *)periph->softc;
 913
 914         if (softc->flags & SA_FLAG_INVALID) {
 915                 cam_periph_unlock(periph);
 916                 biofinish(bp, NULL, ENXIO);
 917                 return;
 918         }
 919
 920         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 921                 cam_periph_unlock(periph);
 922                 biofinish(bp, NULL, EPERM);
 923                 return;
 924         }
 925
 926         /*
 927          * This should actually never occur as the write(2)
 928          * system call traps attempts to write to a read-only
 929          * file descriptor.
 930          */
 931         if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) {
 932                 cam_periph_unlock(periph);
 933                 biofinish(bp, NULL, EBADF);
 934                 return;
 935         }
 936
 937         if (softc->open_pending_mount) {
 938                 int error = samount(periph, 0, bp->bio_dev);
 939                 if (error) {
 940                         cam_periph_unlock(periph);
 941                         biofinish(bp, NULL, ENXIO);
 942                         return;
 943                 }
 944                 saprevent(periph, PR_PREVENT);
 945                 softc->open_pending_mount = 0;
 946         }
 947
 948
 949         /*
 950          * If it's a null transfer, return immediately
 951          */
 952         if (bp->bio_bcount == 0) {
 953                 cam_periph_unlock(periph);
 954                 biodone(bp);
 955                 return;
 956         }
 957
 958         /* valid request?  */
 959         if (softc->flags & SA_FLAG_FIXED) {
 960                 /*
 961                  * Fixed block device.  The byte count must
 962                  * be a multiple of our block size.
 963                  */
 964                 if (((softc->blk_mask != ~0) &&
 965                     ((bp->bio_bcount & softc->blk_mask) != 0)) ||
 966                     ((softc->blk_mask == ~0) &&
 967                     ((bp->bio_bcount % softc->min_blk) != 0))) {
 968                         xpt_print(periph->path, "Invalid request.  Fixed block "
 969                             "device requests must be a multiple of %d bytes\n",
 970                             softc->min_blk);
 971                         cam_periph_unlock(periph);
 972                         biofinish(bp, NULL, EINVAL);
 973                         return;
 974                 }
 975         } else if ((bp->bio_bcount > softc->max_blk) ||
 976                    (bp->bio_bcount < softc->min_blk) ||
 977                    (bp->bio_bcount & softc->blk_mask) != 0) {
 978
 979                 xpt_print_path(periph->path);
 980                 printf("Invalid request.  Variable block "
 981                     "device requests must be ");
 982                 if (softc->blk_mask != 0) {
 983                         printf("a multiple of %d ", (0x1 << softc->blk_gran));
 984                 }
 985                 printf("between %d and %d bytes\n", softc->min_blk,
 986                     softc->max_blk);
 987                 cam_periph_unlock(periph);
 988                 biofinish(bp, NULL, EINVAL);
 989                 return;
 990         }
 991
 992         /*
 993          * Place it at the end of the queue.
 994          */
 995         bioq_insert_tail(&softc->bio_queue, bp);
 996         softc->queue_count++;
 997 #if     0
 998         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 999             ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
1000             (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
1001             (bp->bio_cmd == BIO_READ)? "read" : "write"));
1002 #endif
1003         if (softc->queue_count > 1) {
1004                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1005                     ("sastrategy: queue count now %d\n", softc->queue_count));
1006         }
1007
1008         /*
1009          * Schedule ourselves for performing the work.
1010          */
1011         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1012         cam_periph_unlock(periph);
1013
1014         return;
1015 }
1016
1017 static int
1018 sasetsili(struct cam_periph *periph, struct mtparamset *ps, int num_params)
1019 {
1020         uint32_t sili_blocksize;
1021         struct sa_softc *softc;
1022         int error;
1023
1024         error = 0;
1025         softc = (struct sa_softc *)periph->softc;
1026
1027         if (ps->value_type != MT_PARAM_SET_SIGNED) {
1028                 snprintf(ps->error_str, sizeof(ps->error_str),
1029                     "sili is a signed parameter");
1030                 goto bailout;
1031         }
1032         if ((ps->value.value_signed < 0)
1033          || (ps->value.value_signed > 1)) {
1034                 snprintf(ps->error_str, sizeof(ps->error_str),
1035                     "invalid sili value %jd", (intmax_t)ps->value.value_signed);
1036                 goto bailout_error;
1037         }
1038         /*
1039          * We only set the SILI flag in variable block
1040          * mode.  You'll get a check condition in fixed
1041          * block mode if things don't line up in any case.
1042          */
1043         if (softc->flags & SA_FLAG_FIXED) {
1044                 snprintf(ps->error_str, sizeof(ps->error_str),
1045                     "can't set sili bit in fixed block mode");
1046                 goto bailout_error;
1047         }
1048         if (softc->sili == ps->value.value_signed)
1049                 goto bailout;
1050
1051         if (ps->value.value_signed == 1)
1052                 sili_blocksize = 4;
1053         else
1054                 sili_blocksize = 0;
1055
1056         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
1057                             sili_blocksize, 0, 0, SF_QUIET_IR);
1058         if (error != 0) {
1059                 snprintf(ps->error_str, sizeof(ps->error_str),
1060                     "sasetparams() returned error %d", error);
1061                 goto bailout_error;
1062         }
1063
1064         softc->sili = ps->value.value_signed;
1065
1066 bailout:
1067         ps->status = MT_PARAM_STATUS_OK;
1068         return (error);
1069
1070 bailout_error:
1071         ps->status = MT_PARAM_STATUS_ERROR;
1072         if (error == 0)
1073                 error = EINVAL;
1074
1075         return (error);
1076 }
1077
1078 static int
1079 saseteotwarn(struct cam_periph *periph, struct mtparamset *ps, int num_params)
1080 {
1081         struct sa_softc *softc;
1082         int error;
1083
1084         error = 0;
1085         softc = (struct sa_softc *)periph->softc;
1086
1087         if (ps->value_type != MT_PARAM_SET_SIGNED) {
1088                 snprintf(ps->error_str, sizeof(ps->error_str),
1089                     "eot_warn is a signed parameter");
1090                 ps->status = MT_PARAM_STATUS_ERROR;
1091                 goto bailout;
1092         }
1093         if ((ps->value.value_signed < 0)
1094          || (ps->value.value_signed > 1)) {
1095                 snprintf(ps->error_str, sizeof(ps->error_str),
1096                     "invalid eot_warn value %jd\n",
1097                     (intmax_t)ps->value.value_signed);
1098                 ps->status = MT_PARAM_STATUS_ERROR;
1099                 goto bailout;
1100         }
1101         softc->eot_warn = ps->value.value_signed;
1102         ps->status = MT_PARAM_STATUS_OK;
1103 bailout:
1104         if (ps->status != MT_PARAM_STATUS_OK)
1105                 error = EINVAL;
1106
1107         return (error);
1108 }
1109
1110
1111 static void
1112 safillprot(struct sa_softc *softc, int *indent, struct sbuf *sb)
1113 {
1114         int tmpint;
1115
1116         SASBADDNODE(sb, *indent, protection);
1117         if (softc->flags & SA_FLAG_PROTECT_SUPP)
1118                 tmpint = 1;
1119         else
1120                 tmpint = 0;
1121         SASBADDINTDESC(sb, *indent, tmpint, %d, protection_supported,
1122             "Set to 1 if protection information is supported");
1123
1124         if ((tmpint != 0)
1125          && (softc->prot_info.cur_prot_state.initialized != 0)) {
1126                 struct sa_prot_state *prot;
1127
1128                 prot = &softc->prot_info.cur_prot_state;
1129
1130                 SASBADDUINTDESC(sb, *indent, prot->prot_method, %u,
1131                     prot_method, "Current Protection Method");
1132                 SASBADDUINTDESC(sb, *indent, prot->pi_length, %u,
1133                     pi_length, "Length of Protection Information");
1134                 SASBADDUINTDESC(sb, *indent, prot->lbp_w, %u,
1135                     lbp_w, "Check Protection on Writes");
1136                 SASBADDUINTDESC(sb, *indent, prot->lbp_r, %u,
1137                     lbp_r, "Check and Include Protection on Reads");
1138                 SASBADDUINTDESC(sb, *indent, prot->rbdp, %u,
1139                     rbdp, "Transfer Protection Information for RECOVER "
1140                     "BUFFERED DATA command");
1141         }
1142         SASBENDNODE(sb, *indent, protection);
1143 }
1144
1145 static void
1146 sapopulateprots(struct sa_prot_state *cur_state, struct sa_prot_map *new_table,
1147     int table_ents)
1148 {
1149         int i;
1150
1151         bcopy(sa_prot_table, new_table, min(table_ents * sizeof(*new_table),
1152             sizeof(sa_prot_table)));
1153
1154         table_ents = min(table_ents, SA_NUM_PROT_ENTS);
1155
1156         for (i = 0; i < table_ents; i++)
1157                 new_table[i].value = (uint32_t *)((uint8_t *)cur_state +
1158                     new_table[i].offset);
1159
1160         return;
1161 }
1162
1163 static struct sa_prot_map *
1164 safindprotent(char *name, struct sa_prot_map *table, int table_ents)
1165 {
1166         char *prot_name = "protection.";
1167         int i, prot_len;
1168
1169         prot_len = strlen(prot_name);
1170
1171         /*
1172          * This shouldn't happen, but we check just in case.
1173          */
1174         if (strncmp(name, prot_name, prot_len) != 0)
1175                 goto bailout;
1176
1177         for (i = 0; i < table_ents; i++) {
1178                 if (strcmp(&name[prot_len], table[i].name) != 0)
1179                         continue;
1180                 return (&table[i]);
1181         }
1182 bailout:
1183         return (NULL);
1184 }
1185
1186 static int
1187 sasetprotents(struct cam_periph *periph, struct mtparamset *ps, int num_params)
1188 {
1189         struct sa_softc *softc;
1190         struct sa_prot_map prot_ents[SA_NUM_PROT_ENTS];
1191         struct sa_prot_state new_state;
1192         int error;
1193         int i;
1194
1195         softc = (struct sa_softc *)periph->softc;
1196         error = 0;
1197
1198         /*
1199          * Make sure that this tape drive supports protection information.
1200          * Otherwise we can't set anything.
1201          */
1202         if ((softc->flags & SA_FLAG_PROTECT_SUPP) == 0) {
1203                 snprintf(ps[0].error_str, sizeof(ps[0].error_str),
1204                     "Protection information is not supported for this device");
1205                 ps[0].status = MT_PARAM_STATUS_ERROR;
1206                 goto bailout;
1207         }
1208
1209         /*
1210          * We can't operate with physio(9) splitting enabled, because there
1211          * is no way to insure (especially in variable block mode) that
1212          * what the user writes (with a checksum block at the end) will
1213          * make it into the sa(4) driver intact.
1214          */
1215         if ((softc->si_flags & SI_NOSPLIT) == 0) {
1216                 snprintf(ps[0].error_str, sizeof(ps[0].error_str),
1217                     "Protection information cannot be enabled with I/O "
1218                     "splitting");
1219                 ps[0].status = MT_PARAM_STATUS_ERROR;
1220                 goto bailout;
1221         }
1222
1223         /*
1224          * Take the current cached protection state and use that as the
1225          * basis for our new entries.
1226          */
1227         bcopy(&softc->prot_info.cur_prot_state, &new_state, sizeof(new_state));
1228
1229         /*
1230          * Populate the table mapping property names to pointers into the
1231          * state structure.
1232          */
1233         sapopulateprots(&new_state, prot_ents, SA_NUM_PROT_ENTS);
1234
1235         /*
1236          * For each parameter the user passed in, make sure the name, type
1237          * and value are valid.
1238          */
1239         for (i = 0; i < num_params; i++) {
1240                 struct sa_prot_map *ent;
1241
1242                 ent = safindprotent(ps[i].value_name, prot_ents,
1243                     SA_NUM_PROT_ENTS);
1244                 if (ent == NULL) {
1245                         ps[i].status = MT_PARAM_STATUS_ERROR;
1246                         snprintf(ps[i].error_str, sizeof(ps[i].error_str),
1247                             "Invalid protection entry name %s",
1248                             ps[i].value_name);
1249                         error = EINVAL;
1250                         goto bailout;
1251                 }
1252                 if (ent->param_type != ps[i].value_type) {
1253                         ps[i].status = MT_PARAM_STATUS_ERROR;
1254                         snprintf(ps[i].error_str, sizeof(ps[i].error_str),
1255                             "Supplied type %d does not match actual type %d",
1256                             ps[i].value_type, ent->param_type);
1257                         error = EINVAL;
1258                         goto bailout;
1259                 }
1260                 if ((ps[i].value.value_unsigned < ent->min_val)
1261                  || (ps[i].value.value_unsigned > ent->max_val)) {
1262                         ps[i].status = MT_PARAM_STATUS_ERROR;
1263                         snprintf(ps[i].error_str, sizeof(ps[i].error_str),
1264                             "Value %ju is outside valid range %u - %u",
1265                             (uintmax_t)ps[i].value.value_unsigned, ent->min_val,
1266                             ent->max_val);
1267                         error = EINVAL;
1268                         goto bailout;
1269                 }
1270                 *(ent->value) = ps[i].value.value_unsigned;
1271         }
1272
1273         /*
1274          * Actually send the protection settings to the drive.
1275          */
1276         error = sasetprot(periph, &new_state);
1277         if (error != 0) {
1278                 for (i = 0; i < num_params; i++) {
1279                         ps[i].status = MT_PARAM_STATUS_ERROR;
1280                         snprintf(ps[i].error_str, sizeof(ps[i].error_str),
1281                             "Unable to set parameter, see dmesg(8)");
1282                 }
1283                 goto bailout;
1284         }
1285
1286         /*
1287          * Let the user know that his settings were stored successfully.
1288          */
1289         for (i = 0; i < num_params; i++)
1290                 ps[i].status = MT_PARAM_STATUS_OK;
1291
1292 bailout:
1293         return (error);
1294 }
1295 /*
1296  * Entry handlers generally only handle a single entry.  Node handlers will
1297  * handle a contiguous range of parameters to set in a single call.
1298  */
1299 typedef enum {
1300         SA_PARAM_TYPE_ENTRY,
1301         SA_PARAM_TYPE_NODE
1302 } sa_param_type;
1303
1304 struct sa_param_ent {
1305         char *name;
1306         sa_param_type param_type;
1307         int (*set_func)(struct cam_periph *periph, struct mtparamset *ps,
1308                         int num_params);
1309 } sa_param_table[] = {
1310         {"sili", SA_PARAM_TYPE_ENTRY, sasetsili },
1311         {"eot_warn", SA_PARAM_TYPE_ENTRY, saseteotwarn },
1312         {"protection.", SA_PARAM_TYPE_NODE, sasetprotents }
1313 };
1314
1315 static struct sa_param_ent *
1316 safindparament(struct mtparamset *ps)
1317 {
1318         unsigned int i;
1319
1320         for (i = 0; i < nitems(sa_param_table); i++){
1321                 /*
1322                  * For entries, we compare all of the characters.  For
1323                  * nodes, we only compare the first N characters.  The node
1324                  * handler will decode the rest.
1325                  */
1326                 if (sa_param_table[i].param_type == SA_PARAM_TYPE_ENTRY) {
1327                         if (strcmp(ps->value_name, sa_param_table[i].name) != 0)
1328                                 continue;
1329                 } else {
1330                         if (strncmp(ps->value_name, sa_param_table[i].name,
1331                             strlen(sa_param_table[i].name)) != 0)
1332                                 continue;
1333                 }
1334                 return (&sa_param_table[i]);
1335         }
1336
1337         return (NULL);
1338 }
1339
1340 /*
1341  * Go through a list of parameters, coalescing contiguous parameters with
1342  * the same parent node into a single call to a set_func.
1343  */
1344 static int
1345 saparamsetlist(struct cam_periph *periph, struct mtsetlist *list,
1346     int need_copy)
1347 {
1348         int i, contig_ents;
1349         int error;
1350         struct mtparamset *params, *first;
1351         struct sa_param_ent *first_ent;
1352
1353         error = 0;
1354         params = NULL;
1355
1356         if (list->num_params == 0)
1357                 /* Nothing to do */
1358                 goto bailout;
1359
1360         /*
1361          * Verify that the user has the correct structure size.
1362          */
1363         if ((list->num_params * sizeof(struct mtparamset)) !=
1364              list->param_len) {
1365                 xpt_print(periph->path, "%s: length of params %d != "
1366                     "sizeof(struct mtparamset) %zd * num_params %d\n",
1367                     __func__, list->param_len, sizeof(struct mtparamset),
1368                     list->num_params);
1369                 error = EINVAL;
1370                 goto bailout;
1371         }
1372
1373         if (need_copy != 0) {
1374                 /*
1375                  * XXX KDM will dropping the lock cause an issue here?
1376                  */
1377                 cam_periph_unlock(periph);
1378                 params = malloc(list->param_len, M_SCSISA, M_WAITOK | M_ZERO);
1379                 error = copyin(list->params, params, list->param_len);
1380                 cam_periph_lock(periph);
1381
1382                 if (error != 0)
1383                         goto bailout;
1384         } else {
1385                 params = list->params;
1386         }
1387
1388         contig_ents = 0;
1389         first = NULL;
1390         first_ent = NULL;
1391         for (i = 0; i < list->num_params; i++) {
1392                 struct sa_param_ent *ent;
1393
1394                 ent = safindparament(&params[i]);
1395                 if (ent == NULL) {
1396                         snprintf(params[i].error_str,
1397                             sizeof(params[i].error_str),
1398                             "%s: cannot find parameter %s", __func__,
1399                             params[i].value_name);
1400                         params[i].status = MT_PARAM_STATUS_ERROR;
1401                         break;
1402                 }
1403
1404                 if (first != NULL) {
1405                         if (first_ent == ent) {
1406                                 /*
1407                                  * We're still in a contiguous list of
1408                                  * parameters that can be handled by one
1409                                  * node handler.
1410                                  */
1411                                 contig_ents++;
1412                                 continue;
1413                         } else {
1414                                 error = first_ent->set_func(periph, first,
1415                                     contig_ents);
1416                                 first = NULL;
1417                                 first_ent = NULL;
1418                                 contig_ents = 0;
1419                                 if (error != 0) {
1420                                         error = 0;
1421                                         break;
1422                                 }
1423                         }
1424                 }
1425                 if (ent->param_type == SA_PARAM_TYPE_NODE) {
1426                         first = &params[i];
1427                         first_ent = ent;
1428                         contig_ents = 1;
1429                 } else {
1430                         error = ent->set_func(periph, &params[i], 1);
1431                         if (error != 0) {
1432                                 error = 0;
1433                                 break;
1434                         }
1435                 }
1436         }
1437         if (first != NULL)
1438                 first_ent->set_func(periph, first, contig_ents);
1439
1440 bailout:
1441         if (need_copy != 0) {
1442                 if (error != EFAULT) {
1443                         cam_periph_unlock(periph);
1444                         copyout(params, list->params, list->param_len);
1445                         cam_periph_lock(periph);
1446                 }
1447                 free(params, M_SCSISA);
1448         }
1449         return (error);
1450 }
1451
1452 static int
1453 sagetparams_common(struct cdev *dev, struct cam_periph *periph)
1454 {
1455         struct sa_softc *softc;
1456         u_int8_t write_protect;
1457         int comp_enabled, comp_supported, error;
1458
1459         softc = (struct sa_softc *)periph->softc;
1460
1461         if (softc->open_pending_mount)
1462                 return (0);
1463
1464         /* The control device may issue getparams() if there are no opens. */
1465         if (SA_IS_CTRL(dev) && (softc->flags & SA_FLAG_OPEN) != 0)
1466                 return (0);
1467
1468         error = sagetparams(periph, SA_PARAM_ALL, &softc->media_blksize,
1469             &softc->media_density, &softc->media_numblks, &softc->buffer_mode,
1470             &write_protect, &softc->speed, &comp_supported, &comp_enabled,
1471             &softc->comp_algorithm, NULL, NULL, 0, 0);
1472         if (error)
1473                 return (error);
1474         if (write_protect)
1475                 softc->flags |= SA_FLAG_TAPE_WP;
1476         else
1477                 softc->flags &= ~SA_FLAG_TAPE_WP;
1478         softc->flags &= ~SA_FLAG_COMPRESSION;
1479         if (comp_supported) {
1480                 if (softc->saved_comp_algorithm == 0)
1481                         softc->saved_comp_algorithm =
1482                             softc->comp_algorithm;
1483                 softc->flags |= SA_FLAG_COMP_SUPP;
1484                 if (comp_enabled)
1485                         softc->flags |= SA_FLAG_COMP_ENABLED;
1486         } else
1487                 softc->flags |= SA_FLAG_COMP_UNSUPP;
1488
1489         return (0);
1490 }
1491
1492 #define PENDING_MOUNT_CHECK(softc, periph, dev)         \
1493         if (softc->open_pending_mount) {                \
1494                 error = samount(periph, 0, dev);        \
1495                 if (error) {                            \
1496                         break;                          \
1497                 }                                       \
1498                 saprevent(periph, PR_PREVENT);          \
1499                 softc->open_pending_mount = 0;          \
1500         }
1501
1502 static int
1503 saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
1504 {
1505         struct cam_periph *periph;
1506         struct sa_softc *softc;
1507         scsi_space_code spaceop;
1508         int didlockperiph = 0;
1509         int mode;
1510         int error = 0;
1511
1512         mode = SAMODE(dev);
1513         error = 0;              /* shut up gcc */
1514         spaceop = 0;            /* shut up gcc */
1515
1516         periph = (struct cam_periph *)dev->si_drv1;
1517         cam_periph_lock(periph);
1518         softc = (struct sa_softc *)periph->softc;
1519
1520         /*
1521          * Check for control mode accesses. We allow MTIOCGET and
1522          * MTIOCERRSTAT (but need to be the only one open in order
1523          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
1524          * and MTCOMP (but need to be the only one accessing this
1525          * device to run those).
1526          */
1527
1528         if (SA_IS_CTRL(dev)) {
1529                 switch (cmd) {
1530                 case MTIOCGETEOTMODEL:
1531                 case MTIOCGET:
1532                 case MTIOCEXTGET:
1533                 case MTIOCPARAMGET:
1534                 case MTIOCRBLIM:
1535                         break;
1536                 case MTIOCERRSTAT:
1537                         /*
1538                          * If the periph isn't already locked, lock it
1539                          * so our MTIOCERRSTAT can reset latched error stats.
1540                          *
1541                          * If the periph is already locked, skip it because
1542                          * we're just getting status and it'll be up to the
1543                          * other thread that has this device open to do
1544                          * an MTIOCERRSTAT that would clear latched status.
1545                          */
1546                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
1547                                 error = cam_periph_hold(periph, PRIBIO|PCATCH);
1548                                 if (error != 0) {
1549                                         cam_periph_unlock(periph);
1550                                         return (error);
1551                                 }
1552                                 didlockperiph = 1;
1553                         }
1554                         break;
1555
1556                 case MTIOCTOP:
1557                 {
1558                         struct mtop *mt = (struct mtop *) arg;
1559
1560                         /*
1561                          * Check to make sure it's an OP we can perform
1562                          * with no media inserted.
1563                          */
1564                         switch (mt->mt_op) {
1565                         case MTSETBSIZ:
1566                         case MTSETDNSTY:
1567                         case MTCOMP:
1568                                 mt = NULL;
1569                                 /* FALLTHROUGH */
1570                         default:
1571                                 break;
1572                         }
1573                         if (mt != NULL) {
1574                                 break;
1575                         }
1576                         /* FALLTHROUGH */
1577                 }
1578                 case MTIOCSETEOTMODEL:
1579                         /*
1580                          * We need to acquire the peripheral here rather
1581                          * than at open time because we are sharing writable
1582                          * access to data structures.
1583                          */
1584                         error = cam_periph_hold(periph, PRIBIO|PCATCH);
1585                         if (error != 0) {
1586                                 cam_periph_unlock(periph);
1587                                 return (error);
1588                         }
1589                         didlockperiph = 1;
1590                         break;
1591
1592                 default:
1593                         cam_periph_unlock(periph);
1594                         return (EINVAL);
1595                 }
1596         }
1597
1598         /*
1599          * Find the device that the user is talking about
1600          */
1601         switch (cmd) {
1602         case MTIOCGET:
1603         {
1604                 struct mtget *g = (struct mtget *)arg;
1605
1606                 error = sagetparams_common(dev, periph);
1607                 if (error)
1608                         break;
1609                 bzero(g, sizeof(struct mtget));
1610                 g->mt_type = MT_ISAR;
1611                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
1612                         g->mt_comp = MT_COMP_UNSUPP;
1613                         g->mt_comp0 = MT_COMP_UNSUPP;
1614                         g->mt_comp1 = MT_COMP_UNSUPP;
1615                         g->mt_comp2 = MT_COMP_UNSUPP;
1616                         g->mt_comp3 = MT_COMP_UNSUPP;
1617                 } else {
1618                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
1619                                 g->mt_comp = MT_COMP_DISABLED;
1620                         } else {
1621                                 g->mt_comp = softc->comp_algorithm;
1622                         }
1623                         g->mt_comp0 = softc->comp_algorithm;
1624                         g->mt_comp1 = softc->comp_algorithm;
1625                         g->mt_comp2 = softc->comp_algorithm;
1626                         g->mt_comp3 = softc->comp_algorithm;
1627                 }
1628                 g->mt_density = softc->media_density;
1629                 g->mt_density0 = softc->media_density;
1630                 g->mt_density1 = softc->media_density;
1631                 g->mt_density2 = softc->media_density;
1632                 g->mt_density3 = softc->media_density;
1633                 g->mt_blksiz = softc->media_blksize;
1634                 g->mt_blksiz0 = softc->media_blksize;
1635                 g->mt_blksiz1 = softc->media_blksize;
1636                 g->mt_blksiz2 = softc->media_blksize;
1637                 g->mt_blksiz3 = softc->media_blksize;
1638                 g->mt_fileno = softc->fileno;
1639                 g->mt_blkno = softc->blkno;
1640                 g->mt_dsreg = (short) softc->dsreg;
1641                 /*
1642                  * Yes, we know that this is likely to overflow
1643                  */
1644                 if (softc->last_resid_was_io) {
1645                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
1646                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
1647                                         softc->last_io_resid = 0;
1648                                 }
1649                         }
1650                 } else {
1651                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
1652                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
1653                                         softc->last_ctl_resid = 0;
1654                                 }
1655                         }
1656                 }
1657                 error = 0;
1658                 break;
1659         }
1660         case MTIOCEXTGET:
1661         case MTIOCPARAMGET:
1662         {
1663                 struct mtextget *g = (struct mtextget *)arg;
1664                 char *tmpstr2;
1665                 struct sbuf *sb;
1666
1667                 /*
1668                  * Report drive status using an XML format.
1669                  */
1670
1671                 /*
1672                  * XXX KDM will dropping the lock cause any problems here?
1673                  */
1674                 cam_periph_unlock(periph);
1675                 sb = sbuf_new(NULL, NULL, g->alloc_len, SBUF_FIXEDLEN);
1676                 if (sb == NULL) {
1677                         g->status = MT_EXT_GET_ERROR;
1678                         snprintf(g->error_str, sizeof(g->error_str),
1679                                  "Unable to allocate %d bytes for status info",
1680                                  g->alloc_len);
1681                         cam_periph_lock(periph);
1682                         goto extget_bailout;
1683                 }
1684                 cam_periph_lock(periph);
1685
1686                 if (cmd == MTIOCEXTGET)
1687                         error = saextget(dev, periph, sb, g);
1688                 else
1689                         error = saparamget(softc, sb);
1690
1691                 if (error != 0)
1692                         goto extget_bailout;
1693
1694                 error = sbuf_finish(sb);
1695                 if (error == ENOMEM) {
1696                         g->status = MT_EXT_GET_NEED_MORE_SPACE;
1697                         error = 0;
1698                 } else if (error != 0) {
1699                         g->status = MT_EXT_GET_ERROR;
1700                         snprintf(g->error_str, sizeof(g->error_str),
1701                             "Error %d returned from sbuf_finish()", error);
1702                 } else
1703                         g->status = MT_EXT_GET_OK;
1704
1705                 error = 0;
1706                 tmpstr2 = sbuf_data(sb);
1707                 g->fill_len = strlen(tmpstr2) + 1;
1708                 cam_periph_unlock(periph);
1709
1710                 error = copyout(tmpstr2, g->status_xml, g->fill_len);
1711
1712                 cam_periph_lock(periph);
1713
1714 extget_bailout:
1715                 sbuf_delete(sb);
1716                 break;
1717         }
1718         case MTIOCPARAMSET:
1719         {
1720                 struct mtsetlist list;
1721                 struct mtparamset *ps = (struct mtparamset *)arg;
1722
1723                 bzero(&list, sizeof(list));
1724                 list.num_params = 1;
1725                 list.param_len = sizeof(*ps);
1726                 list.params = ps;
1727
1728                 error = saparamsetlist(periph, &list, /*need_copy*/ 0);
1729                 break;
1730         }
1731         case MTIOCSETLIST:
1732         {
1733                 struct mtsetlist *list = (struct mtsetlist *)arg;
1734
1735                 error = saparamsetlist(periph, list, /*need_copy*/ 1);
1736                 break;
1737         }
1738         case MTIOCERRSTAT:
1739         {
1740                 struct scsi_tape_errors *sep =
1741                     &((union mterrstat *)arg)->scsi_errstat;
1742
1743                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1744                     ("saioctl: MTIOCERRSTAT\n"));
1745
1746                 bzero(sep, sizeof(*sep));
1747                 sep->io_resid = softc->last_io_resid;
1748                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
1749                     sizeof (sep->io_sense));
1750                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
1751                     sizeof (sep->io_cdb));
1752                 sep->ctl_resid = softc->last_ctl_resid;
1753                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
1754                     sizeof (sep->ctl_sense));
1755                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
1756                     sizeof (sep->ctl_cdb));
1757
1758                 if ((SA_IS_CTRL(dev) == 0 && !softc->open_pending_mount) ||
1759                     didlockperiph)
1760                         bzero((caddr_t) &softc->errinfo,
1761                             sizeof (softc->errinfo));
1762                 error = 0;
1763                 break;
1764         }
1765         case MTIOCTOP:
1766         {
1767                 struct mtop *mt;
1768                 int    count;
1769
1770                 PENDING_MOUNT_CHECK(softc, periph, dev);
1771
1772                 mt = (struct mtop *)arg;
1773
1774
1775                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1776                          ("saioctl: op=0x%x count=0x%x\n",
1777                           mt->mt_op, mt->mt_count));
1778
1779                 count = mt->mt_count;
1780                 switch (mt->mt_op) {
1781                 case MTWEOF:    /* write an end-of-file marker */
1782                         /*
1783                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
1784                          * flag because by keeping track of filemarks
1785                          * we have last written we know whether or not
1786                          * we need to write more when we close the device.
1787                          */
1788                         error = sawritefilemarks(periph, count, FALSE, FALSE);
1789                         break;
1790                 case MTWEOFI:
1791                         /* write an end-of-file marker without waiting */
1792                         error = sawritefilemarks(periph, count, FALSE, TRUE);
1793                         break;
1794                 case MTWSS:     /* write a setmark */
1795                         error = sawritefilemarks(periph, count, TRUE, FALSE);
1796                         break;
1797                 case MTBSR:     /* backward space record */
1798                 case MTFSR:     /* forward space record */
1799                 case MTBSF:     /* backward space file */
1800                 case MTFSF:     /* forward space file */
1801                 case MTBSS:     /* backward space setmark */
1802                 case MTFSS:     /* forward space setmark */
1803                 case MTEOD:     /* space to end of recorded medium */
1804                 {
1805                         int nmarks;
1806
1807                         spaceop = SS_FILEMARKS;
1808                         nmarks = softc->filemarks;
1809                         error = sacheckeod(periph);
1810                         if (error) {
1811                                 xpt_print(periph->path,
1812                                     "EOD check prior to spacing failed\n");
1813                                 softc->flags |= SA_FLAG_EIO_PENDING;
1814                                 break;
1815                         }
1816                         nmarks -= softc->filemarks;
1817                         switch(mt->mt_op) {
1818                         case MTBSR:
1819                                 count = -count;
1820                                 /* FALLTHROUGH */
1821                         case MTFSR:
1822                                 spaceop = SS_BLOCKS;
1823                                 break;
1824                         case MTBSF:
1825                                 count = -count;
1826                                 /* FALLTHROUGH */
1827                         case MTFSF:
1828                                 break;
1829                         case MTBSS:
1830                                 count = -count;
1831                                 /* FALLTHROUGH */
1832                         case MTFSS:
1833                                 spaceop = SS_SETMARKS;
1834                                 break;
1835                         case MTEOD:
1836                                 spaceop = SS_EOD;
1837                                 count = 0;
1838                                 nmarks = 0;
1839                                 break;
1840                         default:
1841                                 error = EINVAL;
1842                                 break;
1843                         }
1844                         if (error)
1845                                 break;
1846
1847                         nmarks = softc->filemarks;
1848                         /*
1849                          * XXX: Why are we checking again?
1850                          */
1851                         error = sacheckeod(periph);
1852                         if (error)
1853                                 break;
1854                         nmarks -= softc->filemarks;
1855                         error = saspace(periph, count - nmarks, spaceop);
1856                         /*
1857                          * At this point, clear that we've written the tape
1858                          * and that we've written any filemarks. We really
1859                          * don't know what the applications wishes to do next-
1860                          * the sacheckeod's will make sure we terminated the
1861                          * tape correctly if we'd been writing, but the next
1862                          * action the user application takes will set again
1863                          * whether we need to write filemarks.
1864                          */
1865                         softc->flags &=
1866                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1867                         softc->filemarks = 0;
1868                         break;
1869                 }
1870                 case MTREW:     /* rewind */
1871                         PENDING_MOUNT_CHECK(softc, periph, dev);
1872                         (void) sacheckeod(periph);
1873                         error = sarewind(periph);
1874                         /* see above */
1875                         softc->flags &=
1876                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1877                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1878                         softc->filemarks = 0;
1879                         break;
1880                 case MTERASE:   /* erase */
1881                         PENDING_MOUNT_CHECK(softc, periph, dev);
1882                         error = saerase(periph, count);
1883                         softc->flags &=
1884                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1885                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1886                         break;
1887                 case MTRETENS:  /* re-tension tape */
1888                         PENDING_MOUNT_CHECK(softc, periph, dev);
1889                         error = saretension(periph);
1890                         softc->flags &=
1891                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1892                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1893                         break;
1894                 case MTOFFL:    /* rewind and put the drive offline */
1895
1896                         PENDING_MOUNT_CHECK(softc, periph, dev);
1897
1898                         (void) sacheckeod(periph);
1899                         /* see above */
1900                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1901                         softc->filemarks = 0;
1902
1903                         error = sarewind(periph);
1904                         /* clear the frozen flag anyway */
1905                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1906
1907                         /*
1908                          * Be sure to allow media removal before ejecting.
1909                          */
1910
1911                         saprevent(periph, PR_ALLOW);
1912                         if (error == 0) {
1913                                 error = saloadunload(periph, FALSE);
1914                                 if (error == 0) {
1915                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1916                                 }
1917                         }
1918                         break;
1919
1920                 case MTLOAD:
1921                         error = saloadunload(periph, TRUE);
1922                         break;
1923                 case MTNOP:     /* no operation, sets status only */
1924                 case MTCACHE:   /* enable controller cache */
1925                 case MTNOCACHE: /* disable controller cache */
1926                         error = 0;
1927                         break;
1928
1929                 case MTSETBSIZ: /* Set block size for device */
1930
1931                         PENDING_MOUNT_CHECK(softc, periph, dev);
1932
1933                         if ((softc->sili != 0)
1934                          && (count != 0)) {
1935                                 xpt_print(periph->path, "Can't enter fixed "
1936                                     "block mode with SILI enabled\n");
1937                                 error = EINVAL;
1938                                 break;
1939                         }
1940                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1941                                             0, 0, 0);
1942                         if (error == 0) {
1943                                 softc->last_media_blksize =
1944                                     softc->media_blksize;
1945                                 softc->media_blksize = count;
1946                                 if (count) {
1947                                         softc->flags |= SA_FLAG_FIXED;
1948                                         if (powerof2(count)) {
1949                                                 softc->blk_shift =
1950                                                     ffs(count) - 1;
1951                                                 softc->blk_mask = count - 1;
1952                                         } else {
1953                                                 softc->blk_mask = ~0;
1954                                                 softc->blk_shift = 0;
1955                                         }
1956                                         /*
1957                                          * Make the user's desire 'persistent'.
1958                                          */
1959                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1960                                         softc->quirks |= SA_QUIRK_FIXED;
1961                                 } else {
1962                                         softc->flags &= ~SA_FLAG_FIXED;
1963                                         if (softc->max_blk == 0) {
1964                                                 softc->max_blk = ~0;
1965                                         }
1966                                         softc->blk_shift = 0;
1967                                         if (softc->blk_gran != 0) {
1968                                                 softc->blk_mask =
1969                                                     softc->blk_gran - 1;
1970                                         } else {
1971                                                 softc->blk_mask = 0;
1972                                         }
1973                                         /*
1974                                          * Make the user's desire 'persistent'.
1975                                          */
1976                                         softc->quirks |= SA_QUIRK_VARIABLE;
1977                                         softc->quirks &= ~SA_QUIRK_FIXED;
1978                                 }
1979                         }
1980                         break;
1981                 case MTSETDNSTY:        /* Set density for device and mode */
1982                         PENDING_MOUNT_CHECK(softc, periph, dev);
1983
1984                         if (count > UCHAR_MAX) {
1985                                 error = EINVAL;
1986                                 break;
1987                         } else {
1988                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1989                                                     0, count, 0, 0);
1990                         }
1991                         break;
1992                 case MTCOMP:    /* enable compression */
1993                         PENDING_MOUNT_CHECK(softc, periph, dev);
1994                         /*
1995                          * Some devices don't support compression, and
1996                          * don't like it if you ask them for the
1997                          * compression page.
1998                          */
1999                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
2000                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
2001                                 error = ENODEV;
2002                                 break;
2003                         }
2004                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
2005                             0, 0, count, SF_NO_PRINT);
2006                         break;
2007                 default:
2008                         error = EINVAL;
2009                 }
2010                 break;
2011         }
2012         case MTIOCIEOT:
2013         case MTIOCEEOT:
2014                 error = 0;
2015                 break;
2016         case MTIOCRDSPOS:
2017                 PENDING_MOUNT_CHECK(softc, periph, dev);
2018                 error = sardpos(periph, 0, (u_int32_t *) arg);
2019                 break;
2020         case MTIOCRDHPOS:
2021                 PENDING_MOUNT_CHECK(softc, periph, dev);
2022                 error = sardpos(periph, 1, (u_int32_t *) arg);
2023                 break;
2024         case MTIOCSLOCATE:
2025         case MTIOCHLOCATE: {
2026                 struct mtlocate locate_info;
2027                 int hard;
2028
2029                 bzero(&locate_info, sizeof(locate_info));
2030                 locate_info.logical_id = *((uint32_t *)arg);
2031                 if (cmd == MTIOCSLOCATE)
2032                         hard = 0;
2033                 else
2034                         hard = 1;
2035
2036                 PENDING_MOUNT_CHECK(softc, periph, dev);
2037
2038                 error = sasetpos(periph, hard, &locate_info);
2039                 break;
2040         }
2041         case MTIOCEXTLOCATE:
2042                 PENDING_MOUNT_CHECK(softc, periph, dev);
2043                 error = sasetpos(periph, /*hard*/ 0, (struct mtlocate *)arg);
2044                 softc->flags &=
2045                     ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
2046                 softc->flags &= ~SA_FLAG_ERR_PENDING;
2047                 softc->filemarks = 0;
2048                 break;
2049         case MTIOCGETEOTMODEL:
2050                 error = 0;
2051                 if (softc->quirks & SA_QUIRK_1FM)
2052                         mode = 1;
2053                 else
2054                         mode = 2;
2055                 *((u_int32_t *) arg) = mode;
2056                 break;
2057         case MTIOCSETEOTMODEL:
2058                 error = 0;
2059                 switch (*((u_int32_t *) arg)) {
2060                 case 1:
2061                         softc->quirks &= ~SA_QUIRK_2FM;
2062                         softc->quirks |= SA_QUIRK_1FM;
2063                         break;
2064                 case 2:
2065                         softc->quirks &= ~SA_QUIRK_1FM;
2066                         softc->quirks |= SA_QUIRK_2FM;
2067                         break;
2068                 default:
2069                         error = EINVAL;
2070                         break;
2071                 }
2072                 break;
2073         case MTIOCRBLIM: {
2074                 struct mtrblim *rblim;
2075
2076                 rblim = (struct mtrblim *)arg;
2077
2078                 rblim->granularity = softc->blk_gran;
2079                 rblim->min_block_length = softc->min_blk;
2080                 rblim->max_block_length = softc->max_blk;
2081                 break;
2082         }
2083         default:
2084                 error = cam_periph_ioctl(periph, cmd, arg, saerror);
2085                 break;
2086         }
2087
2088         /*
2089          * Check to see if we cleared a frozen state
2090          */
2091         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
2092                 switch(cmd) {
2093                 case MTIOCRDSPOS:
2094                 case MTIOCRDHPOS:
2095                 case MTIOCSLOCATE:
2096                 case MTIOCHLOCATE:
2097                         /*
2098                          * XXX KDM look at this.
2099                          */
2100                         softc->fileno = (daddr_t) -1;
2101                         softc->blkno = (daddr_t) -1;
2102                         softc->rep_blkno = (daddr_t) -1;
2103                         softc->rep_fileno = (daddr_t) -1;
2104                         softc->partition = (daddr_t) -1;
2105                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
2106                         xpt_print(periph->path,
2107                             "tape state now unfrozen.\n");
2108                         break;
2109                 default:
2110                         break;
2111                 }
2112         }
2113         if (didlockperiph) {
2114                 cam_periph_unhold(periph);
2115         }
2116         cam_periph_unlock(periph);
2117         return (error);
2118 }
2119
2120 static void
2121 sainit(void)
2122 {
2123         cam_status status;
2124
2125         /*
2126          * Install a global async callback.
2127          */
2128         status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
2129
2130         if (status != CAM_REQ_CMP) {
2131                 printf("sa: Failed to attach master async callback "
2132                        "due to status 0x%x!\n", status);
2133         }
2134 }
2135
2136 static void
2137 sadevgonecb(void *arg)
2138 {
2139         struct cam_periph *periph;
2140         struct mtx *mtx;
2141         struct sa_softc *softc;
2142
2143         periph = (struct cam_periph *)arg;
2144         softc = (struct sa_softc *)periph->softc;
2145
2146         mtx = cam_periph_mtx(periph);
2147         mtx_lock(mtx);
2148
2149         softc->num_devs_to_destroy--;
2150         if (softc->num_devs_to_destroy == 0) {
2151                 int i;
2152
2153                 /*
2154                  * When we have gotten all of our callbacks, we will get
2155                  * no more close calls from devfs.  So if we have any
2156                  * dangling opens, we need to release the reference held
2157                  * for that particular context.
2158                  */
2159                 for (i = 0; i < softc->open_count; i++)
2160                         cam_periph_release_locked(periph);
2161
2162                 softc->open_count = 0;
2163
2164                 /*
2165                  * Release the reference held for devfs, all of our
2166                  * instances are gone now.
2167                  */
2168                 cam_periph_release_locked(periph);
2169         }
2170
2171         /*
2172          * We reference the lock directly here, instead of using
2173          * cam_periph_unlock().  The reason is that the final call to
2174          * cam_periph_release_locked() above could result in the periph
2175          * getting freed.  If that is the case, dereferencing the periph
2176          * with a cam_periph_unlock() call would cause a page fault.
2177          */
2178         mtx_unlock(mtx);
2179 }
2180
2181 static void
2182 saoninvalidate(struct cam_periph *periph)
2183 {
2184         struct sa_softc *softc;
2185
2186         softc = (struct sa_softc *)periph->softc;
2187
2188         /*
2189          * De-register any async callbacks.
2190          */
2191         xpt_register_async(0, saasync, periph, periph->path);
2192
2193         softc->flags |= SA_FLAG_INVALID;
2194
2195         /*
2196          * Return all queued I/O with ENXIO.
2197          * XXX Handle any transactions queued to the card
2198          *     with XPT_ABORT_CCB.
2199          */
2200         bioq_flush(&softc->bio_queue, NULL, ENXIO);
2201         softc->queue_count = 0;
2202
2203         /*
2204          * Tell devfs that all of our devices have gone away, and ask for a
2205          * callback when it has cleaned up its state.
2206          */
2207         destroy_dev_sched_cb(softc->devs.ctl_dev, sadevgonecb, periph);
2208         destroy_dev_sched_cb(softc->devs.r_dev, sadevgonecb, periph);
2209         destroy_dev_sched_cb(softc->devs.nr_dev, sadevgonecb, periph);
2210         destroy_dev_sched_cb(softc->devs.er_dev, sadevgonecb, periph);
2211 }
2212
2213 static void
2214 sacleanup(struct cam_periph *periph)
2215 {
2216         struct sa_softc *softc;
2217
2218         softc = (struct sa_softc *)periph->softc;
2219
2220         cam_periph_unlock(periph);
2221
2222         if ((softc->flags & SA_FLAG_SCTX_INIT) != 0
2223          && sysctl_ctx_free(&softc->sysctl_ctx) != 0)
2224                 xpt_print(periph->path, "can't remove sysctl context\n");
2225
2226         cam_periph_lock(periph);
2227
2228         devstat_remove_entry(softc->device_stats);
2229
2230         free(softc, M_SCSISA);
2231 }
2232
2233 static void
2234 saasync(void *callback_arg, u_int32_t code,
2235         struct cam_path *path, void *arg)
2236 {
2237         struct cam_periph *periph;
2238
2239         periph = (struct cam_periph *)callback_arg;
2240         switch (code) {
2241         case AC_FOUND_DEVICE:
2242         {
2243                 struct ccb_getdev *cgd;
2244                 cam_status status;
2245
2246                 cgd = (struct ccb_getdev *)arg;
2247                 if (cgd == NULL)
2248                         break;
2249
2250                 if (cgd->protocol != PROTO_SCSI)
2251                         break;
2252                 if (SID_QUAL(&cgd->inq_data) != SID_QUAL_LU_CONNECTED)
2253                         break;
2254                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
2255                         break;
2256
2257                 /*
2258                  * Allocate a peripheral instance for
2259                  * this device and start the probe
2260                  * process.
2261                  */
2262                 status = cam_periph_alloc(saregister, saoninvalidate,
2263                                           sacleanup, sastart,
2264                                           "sa", CAM_PERIPH_BIO, path,
2265                                           saasync, AC_FOUND_DEVICE, cgd);
2266
2267                 if (status != CAM_REQ_CMP
2268                  && status != CAM_REQ_INPROG)
2269                         printf("saasync: Unable to probe new device "
2270                                 "due to status 0x%x\n", status);
2271                 break;
2272         }
2273         default:
2274                 cam_periph_async(periph, code, path, arg);
2275                 break;
2276         }
2277 }
2278
2279 static void
2280 sasetupdev(struct sa_softc *softc, struct cdev *dev)
2281 {
2282
2283         dev->si_iosize_max = softc->maxio;
2284         dev->si_flags |= softc->si_flags;
2285         /*
2286          * Keep a count of how many non-alias devices we have created,
2287          * so we can make sure we clean them all up on shutdown.  Aliases
2288          * are cleaned up when we destroy the device they're an alias for.
2289          */
2290         if ((dev->si_flags & SI_ALIAS) == 0)
2291                 softc->num_devs_to_destroy++;
2292 }
2293
2294 static void
2295 sasysctlinit(void *context, int pending)
2296 {
2297         struct cam_periph *periph;
2298         struct sa_softc *softc;
2299         char tmpstr[80], tmpstr2[80];
2300
2301         periph = (struct cam_periph *)context;
2302         /*
2303          * If the periph is invalid, no need to setup the sysctls.
2304          */
2305         if (periph->flags & CAM_PERIPH_INVALID)
2306                 goto bailout;
2307
2308         softc = (struct sa_softc *)periph->softc;
2309
2310         snprintf(tmpstr, sizeof(tmpstr), "CAM SA unit %d", periph->unit_number);
2311         snprintf(tmpstr2, sizeof(tmpstr2), "%u", periph->unit_number);
2312
2313         sysctl_ctx_init(&softc->sysctl_ctx);
2314         softc->flags |= SA_FLAG_SCTX_INIT;
2315         softc->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&softc->sysctl_ctx,
2316             SYSCTL_STATIC_CHILDREN(_kern_cam_sa), OID_AUTO, tmpstr2,
2317             CTLFLAG_RD, 0, tmpstr, "device_index");
2318         if (softc->sysctl_tree == NULL)
2319                 goto bailout;
2320
2321         SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
2322             OID_AUTO, "allow_io_split", CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
2323             &softc->allow_io_split, 0, "Allow Splitting I/O");
2324         SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
2325             OID_AUTO, "maxio", CTLFLAG_RD,
2326             &softc->maxio, 0, "Maximum I/O size");
2327         SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
2328             OID_AUTO, "cpi_maxio", CTLFLAG_RD,
2329             &softc->cpi_maxio, 0, "Maximum Controller I/O size");
2330         SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
2331             OID_AUTO, "inject_eom", CTLFLAG_RW,
2332             &softc->inject_eom, 0, "Queue EOM for the next write/read");
2333
2334 bailout:
2335         /*
2336          * Release the reference that was held when this task was enqueued.
2337          */
2338         cam_periph_release(periph);
2339 }
2340
2341 static cam_status
2342 saregister(struct cam_periph *periph, void *arg)
2343 {
2344         struct sa_softc *softc;
2345         struct ccb_getdev *cgd;
2346         struct ccb_pathinq cpi;
2347         struct make_dev_args args;
2348         caddr_t match;
2349         char tmpstr[80];
2350         int error;
2351
2352         cgd = (struct ccb_getdev *)arg;
2353         if (cgd == NULL) {
2354                 printf("saregister: no getdev CCB, can't register device\n");
2355                 return (CAM_REQ_CMP_ERR);
2356         }
2357
2358         softc = (struct sa_softc *)
2359             malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO);
2360         if (softc == NULL) {
2361                 printf("saregister: Unable to probe new device. "
2362                        "Unable to allocate softc\n");
2363                 return (CAM_REQ_CMP_ERR);
2364         }
2365         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
2366         softc->state = SA_STATE_NORMAL;
2367         softc->fileno = (daddr_t) -1;
2368         softc->blkno = (daddr_t) -1;
2369         softc->rep_fileno = (daddr_t) -1;
2370         softc->rep_blkno = (daddr_t) -1;
2371         softc->partition = (daddr_t) -1;
2372         softc->bop = -1;
2373         softc->eop = -1;
2374         softc->bpew = -1;
2375
2376         bioq_init(&softc->bio_queue);
2377         softc->periph = periph;
2378         periph->softc = softc;
2379
2380         /*
2381          * See if this device has any quirks.
2382          */
2383         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
2384                                (caddr_t)sa_quirk_table,
2385                                nitems(sa_quirk_table),
2386                                sizeof(*sa_quirk_table), scsi_inquiry_match);
2387
2388         if (match != NULL) {
2389                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
2390                 softc->last_media_blksize =
2391                     ((struct sa_quirk_entry *)match)->prefblk;
2392         } else
2393                 softc->quirks = SA_QUIRK_NONE;
2394
2395         /*
2396          * Long format data for READ POSITION was introduced in SSC, which
2397          * was after SCSI-2.  (Roughly equivalent to SCSI-3.)  If the drive
2398          * reports that it is SCSI-2 or older, it is unlikely to support
2399          * long position data, but it might.  Some drives from that era
2400          * claim to be SCSI-2, but do support long position information.
2401          * So, instead of immediately disabling long position information
2402          * for SCSI-2 devices, we'll try one pass through sagetpos(), and
2403          * then disable long position information if we get an error.
2404          */
2405         if (cgd->inq_data.version <= SCSI_REV_CCS)
2406                 softc->quirks |= SA_QUIRK_NO_LONG_POS;
2407
2408         if (cgd->inq_data.spc3_flags & SPC3_SID_PROTECT) {
2409                 struct ccb_dev_advinfo cdai;
2410                 struct scsi_vpd_extended_inquiry_data ext_inq;
2411
2412                 bzero(&ext_inq, sizeof(ext_inq));
2413
2414                 xpt_setup_ccb(&cdai.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
2415
2416                 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
2417                 cdai.flags = CDAI_FLAG_NONE;
2418                 cdai.buftype = CDAI_TYPE_EXT_INQ;
2419                 cdai.bufsiz = sizeof(ext_inq);
2420                 cdai.buf = (uint8_t *)&ext_inq;
2421                 xpt_action((union ccb *)&cdai);
2422
2423                 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
2424                         cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
2425                 if ((cdai.ccb_h.status == CAM_REQ_CMP)
2426                  && (ext_inq.flags1 & SVPD_EID_SA_SPT_LBP))
2427                         softc->flags |= SA_FLAG_PROTECT_SUPP;
2428         }
2429
2430         xpt_path_inq(&cpi, periph->path);
2431
2432         /*
2433          * The SA driver supports a blocksize, but we don't know the
2434          * blocksize until we media is inserted.  So, set a flag to
2435          * indicate that the blocksize is unavailable right now.
2436          */
2437         cam_periph_unlock(periph);
2438         softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0,
2439             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
2440             XPORT_DEVSTAT_TYPE(cpi.transport), DEVSTAT_PRIORITY_TAPE);
2441
2442         /*
2443          * Load the default value that is either compiled in, or loaded
2444          * in the global kern.cam.sa.allow_io_split tunable.
2445          */
2446         softc->allow_io_split = sa_allow_io_split;
2447
2448         /*
2449          * Load a per-instance tunable, if it exists.  NOTE that this
2450          * tunable WILL GO AWAY in FreeBSD 11.0.
2451          */
2452         snprintf(tmpstr, sizeof(tmpstr), "kern.cam.sa.%u.allow_io_split",
2453                  periph->unit_number);
2454         TUNABLE_INT_FETCH(tmpstr, &softc->allow_io_split);
2455
2456         /*
2457          * If maxio isn't set, we fall back to DFLTPHYS.  Otherwise we take
2458          * the smaller of cpi.maxio or MAXPHYS.
2459          */
2460         if (cpi.maxio == 0)
2461                 softc->maxio = DFLTPHYS;
2462         else if (cpi.maxio > MAXPHYS)
2463                 softc->maxio = MAXPHYS;
2464         else
2465                 softc->maxio = cpi.maxio;
2466
2467         /*
2468          * Record the controller's maximum I/O size so we can report it to
2469          * the user later.
2470          */
2471         softc->cpi_maxio = cpi.maxio;
2472
2473         /*
2474          * By default we tell physio that we do not want our I/O split.
2475          * The user needs to have a 1:1 mapping between the size of his
2476          * write to a tape character device and the size of the write
2477          * that actually goes down to the drive.
2478          */
2479         if (softc->allow_io_split == 0)
2480                 softc->si_flags = SI_NOSPLIT;
2481         else
2482                 softc->si_flags = 0;
2483
2484         TASK_INIT(&softc->sysctl_task, 0, sasysctlinit, periph);
2485
2486         /*
2487          * If the SIM supports unmapped I/O, let physio know that we can
2488          * handle unmapped buffers.
2489          */
2490         if (cpi.hba_misc & PIM_UNMAPPED)
2491                 softc->si_flags |= SI_UNMAPPED;
2492
2493         /*
2494          * Acquire a reference to the periph before we create the devfs
2495          * instances for it.  We'll release this reference once the devfs
2496          * instances have been freed.
2497          */
2498         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
2499                 xpt_print(periph->path, "%s: lost periph during "
2500                           "registration!\n", __func__);
2501                 cam_periph_lock(periph);
2502                 return (CAM_REQ_CMP_ERR);
2503         }
2504
2505         make_dev_args_init(&args);
2506         args.mda_devsw = &sa_cdevsw;
2507         args.mda_si_drv1 = softc->periph;
2508         args.mda_uid = UID_ROOT;
2509         args.mda_gid = GID_OPERATOR;
2510         args.mda_mode = 0660;
2511
2512         args.mda_unit = SAMINOR(SA_CTLDEV, SA_ATYPE_R);
2513         error = make_dev_s(&args, &softc->devs.ctl_dev, "%s%d.ctl",
2514             periph->periph_name, periph->unit_number);
2515         if (error != 0) {
2516                 cam_periph_lock(periph);
2517                 return (CAM_REQ_CMP_ERR);
2518         }
2519         sasetupdev(softc, softc->devs.ctl_dev);
2520
2521         args.mda_unit = SAMINOR(SA_NOT_CTLDEV, SA_ATYPE_R);
2522         error = make_dev_s(&args, &softc->devs.r_dev, "%s%d",
2523             periph->periph_name, periph->unit_number);
2524         if (error != 0) {
2525                 cam_periph_lock(periph);
2526                 return (CAM_REQ_CMP_ERR);
2527         }
2528         sasetupdev(softc, softc->devs.r_dev);
2529
2530         args.mda_unit = SAMINOR(SA_NOT_CTLDEV, SA_ATYPE_NR);
2531         error = make_dev_s(&args, &softc->devs.nr_dev, "n%s%d",
2532             periph->periph_name, periph->unit_number);
2533         if (error != 0) {
2534                 cam_periph_lock(periph);
2535                 return (CAM_REQ_CMP_ERR);
2536         }
2537         sasetupdev(softc, softc->devs.nr_dev);
2538
2539         args.mda_unit = SAMINOR(SA_NOT_CTLDEV, SA_ATYPE_ER);
2540         error = make_dev_s(&args, &softc->devs.er_dev, "e%s%d",
2541             periph->periph_name, periph->unit_number);
2542         if (error != 0) {
2543                 cam_periph_lock(periph);
2544                 return (CAM_REQ_CMP_ERR);
2545         }
2546         sasetupdev(softc, softc->devs.er_dev);
2547
2548         cam_periph_lock(periph);
2549
2550         softc->density_type_bits[0] = 0;
2551         softc->density_type_bits[1] = SRDS_MEDIA;
2552         softc->density_type_bits[2] = SRDS_MEDIUM_TYPE;
2553         softc->density_type_bits[3] = SRDS_MEDIUM_TYPE | SRDS_MEDIA;
2554         /*
2555          * Bump the peripheral refcount for the sysctl thread, in case we
2556          * get invalidated before the thread has a chance to run.
2557          */
2558         cam_periph_acquire(periph);
2559         taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task);
2560
2561         /*
2562          * Add an async callback so that we get
2563          * notified if this device goes away.
2564          */
2565         xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
2566
2567         xpt_announce_periph(periph, NULL);
2568         xpt_announce_quirks(periph, softc->quirks, SA_QUIRK_BIT_STRING);
2569
2570         return (CAM_REQ_CMP);
2571 }
2572
2573 static void
2574 sastart(struct cam_periph *periph, union ccb *start_ccb)
2575 {
2576         struct sa_softc *softc;
2577
2578         softc = (struct sa_softc *)periph->softc;
2579
2580         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
2581
2582
2583         switch (softc->state) {
2584         case SA_STATE_NORMAL:
2585         {
2586                 /* Pull a buffer from the queue and get going on it */
2587                 struct bio *bp;
2588
2589                 /*
2590                  * See if there is a buf with work for us to do..
2591                  */
2592                 bp = bioq_first(&softc->bio_queue);
2593                 if (bp == NULL) {
2594                         xpt_release_ccb(start_ccb);
2595                 } else if (((softc->flags & SA_FLAG_ERR_PENDING) != 0)
2596                         || (softc->inject_eom != 0)) {
2597                         struct bio *done_bp;
2598
2599                         if (softc->inject_eom != 0) {
2600                                 softc->flags |= SA_FLAG_EOM_PENDING;
2601                                 softc->inject_eom = 0;
2602                                 /*
2603                                  * If we're injecting EOM for writes, we
2604                                  * need to keep PEWS set for 3 queries
2605                                  * to cover 2 position requests from the
2606                                  * kernel via sagetpos(), and then allow
2607                                  * for one for the user to see the BPEW
2608                                  * flag (e.g. via mt status).  After that,
2609                                  * it will be cleared.
2610                                  */
2611                                 if (bp->bio_cmd == BIO_WRITE)
2612                                         softc->set_pews_status = 3;
2613                                 else
2614                                         softc->set_pews_status = 1;
2615                         }
2616 again:
2617                         softc->queue_count--;
2618                         bioq_remove(&softc->bio_queue, bp);
2619                         bp->bio_resid = bp->bio_bcount;
2620                         done_bp = bp;
2621                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
2622                                 /*
2623                                  * We have two different behaviors for
2624                                  * writes when we hit either Early Warning
2625                                  * or the PEWZ (Programmable Early Warning
2626                                  * Zone).  The default behavior is that
2627                                  * for all writes that are currently
2628                                  * queued after the write where we saw the
2629                                  * early warning, we will return the write
2630                                  * with the residual equal to the count.
2631                                  * i.e. tell the application that 0 bytes
2632                                  * were written.
2633                                  *
2634                                  * The alternate behavior, which is enabled
2635                                  * when eot_warn is set, is that in
2636                                  * addition to setting the residual equal
2637                                  * to the count, we will set the error
2638                                  * to ENOSPC.
2639                                  *
2640                                  * In either case, once queued writes are
2641                                  * cleared out, we clear the error flag
2642                                  * (see below) and the application is free to
2643                                  * attempt to write more.
2644                                  */
2645                                 if (softc->eot_warn != 0) {
2646                                         bp->bio_flags |= BIO_ERROR;
2647                                         bp->bio_error = ENOSPC;
2648                                 } else
2649                                         bp->bio_error = 0;
2650                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
2651                                 /*
2652                                  * This can only happen if we're reading
2653                                  * in fixed length mode. In this case,
2654                                  * we dump the rest of the list the
2655                                  * same way.
2656                                  */
2657                                 bp->bio_error = 0;
2658                                 if (bioq_first(&softc->bio_queue) != NULL) {
2659                                         biodone(done_bp);
2660                                         goto again;
2661                                 }
2662                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
2663                                 bp->bio_error = EIO;
2664                                 bp->bio_flags |= BIO_ERROR;
2665                         }
2666                         bp = bioq_first(&softc->bio_queue);
2667                         /*
2668                          * Only if we have no other buffers queued up
2669                          * do we clear the pending error flag.
2670                          */
2671                         if (bp == NULL)
2672                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
2673                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2674                             ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
2675                             "%d more buffers queued up\n",
2676                             (softc->flags & SA_FLAG_ERR_PENDING),
2677                             (bp != NULL)? "not " : " ", softc->queue_count));
2678                         xpt_release_ccb(start_ccb);
2679                         biodone(done_bp);
2680                 } else {
2681                         u_int32_t length;
2682
2683                         bioq_remove(&softc->bio_queue, bp);
2684                         softc->queue_count--;
2685
2686                         length = bp->bio_bcount;
2687
2688                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2689                                 if (softc->blk_shift != 0) {
2690                                         length = length >> softc->blk_shift;
2691                                 } else if (softc->media_blksize != 0) {
2692                                         length = length / softc->media_blksize;
2693                                 } else {
2694                                         bp->bio_error = EIO;
2695                                         xpt_print(periph->path, "zero blocksize"
2696                                             " for FIXED length writes?\n");
2697                                         biodone(bp);
2698                                         break;
2699                                 }
2700 #if     0
2701                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
2702                                     ("issuing a %d fixed record %s\n",
2703                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
2704                                     "write"));
2705 #endif
2706                         } else {
2707 #if     0
2708                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
2709                                     ("issuing a %d variable byte %s\n",
2710                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
2711                                     "write"));
2712 #endif
2713                         }
2714                         devstat_start_transaction_bio(softc->device_stats, bp);
2715                         /*
2716                          * Some people have theorized that we should
2717                          * suppress illegal length indication if we are
2718                          * running in variable block mode so that we don't
2719                          * have to request sense every time our requested
2720                          * block size is larger than the written block.
2721                          * The residual information from the ccb allows
2722                          * us to identify this situation anyway.  The only
2723                          * problem with this is that we will not get
2724                          * information about blocks that are larger than
2725                          * our read buffer unless we set the block size
2726                          * in the mode page to something other than 0.
2727                          *
2728                          * I believe that this is a non-issue. If user apps
2729                          * don't adjust their read size to match our record
2730                          * size, that's just life. Anyway, the typical usage
2731                          * would be to issue, e.g., 64KB reads and occasionally
2732                          * have to do deal with 512 byte or 1KB intermediate
2733                          * records.
2734                          *
2735                          * That said, though, we now support setting the
2736                          * SILI bit on reads, and we set the blocksize to 4
2737                          * bytes when we do that.  This gives us
2738                          * compatibility with software that wants this,
2739                          * although the only real difference between that
2740                          * and not setting the SILI bit on reads is that we
2741                          * won't get a check condition on reads where our
2742                          * request size is larger than the block on tape.
2743                          * That probably only makes a real difference in
2744                          * non-packetized SCSI, where you have to go back
2745                          * to the drive to request sense and thus incur
2746                          * more latency.
2747                          */
2748                         softc->dsreg = (bp->bio_cmd == BIO_READ)?
2749                             MTIO_DSREG_RD : MTIO_DSREG_WR;
2750                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
2751                             MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ ?
2752                             SCSI_RW_READ : SCSI_RW_WRITE) |
2753                             ((bp->bio_flags & BIO_UNMAPPED) != 0 ?
2754                             SCSI_RW_BIO : 0), softc->sili,
2755                             (softc->flags & SA_FLAG_FIXED) != 0, length,
2756                             (bp->bio_flags & BIO_UNMAPPED) != 0 ? (void *)bp :
2757                             bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE,
2758                             IO_TIMEOUT);
2759                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
2760                         start_ccb->ccb_h.ccb_bp = bp;
2761                         bp = bioq_first(&softc->bio_queue);
2762                         xpt_action(start_ccb);
2763                 }
2764
2765                 if (bp != NULL) {
2766                         /* Have more work to do, so ensure we stay scheduled */
2767                         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
2768                 }
2769                 break;
2770         }
2771         case SA_STATE_ABNORMAL:
2772         default:
2773                 panic("state 0x%x in sastart", softc->state);
2774                 break;
2775         }
2776 }
2777
2778
2779 static void
2780 sadone(struct cam_periph *periph, union ccb *done_ccb)
2781 {
2782         struct sa_softc *softc;
2783         struct ccb_scsiio *csio;
2784         struct bio *bp;
2785         int error;
2786
2787         softc = (struct sa_softc *)periph->softc;
2788         csio = &done_ccb->csio;
2789
2790         softc->dsreg = MTIO_DSREG_REST;
2791         bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
2792         error = 0;
2793         if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2794                 if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
2795                         /*
2796                          * A retry was scheduled, so just return.
2797                          */
2798                         return;
2799                 }
2800         }
2801
2802         if (error == EIO) {
2803
2804                 /*
2805                  * Catastrophic error. Mark the tape as frozen
2806                  * (we no longer know tape position).
2807                  *
2808                  * Return all queued I/O with EIO, and unfreeze
2809                  * our queue so that future transactions that
2810                  * attempt to fix this problem can get to the
2811                  * device.
2812                  *
2813                  */
2814
2815                 softc->flags |= SA_FLAG_TAPE_FROZEN;
2816                 bioq_flush(&softc->bio_queue, NULL, EIO);
2817         }
2818         if (error != 0) {
2819                 bp->bio_resid = bp->bio_bcount;
2820                 bp->bio_error = error;
2821                 bp->bio_flags |= BIO_ERROR;
2822                 /*
2823                  * In the error case, position is updated in saerror.
2824                  */
2825         } else {
2826                 bp->bio_resid = csio->resid;
2827                 bp->bio_error = 0;
2828                 if (csio->resid != 0) {
2829                         bp->bio_flags |= BIO_ERROR;
2830                 }
2831                 if (bp->bio_cmd == BIO_WRITE) {
2832                         softc->flags |= SA_FLAG_TAPE_WRITTEN;
2833                         softc->filemarks = 0;
2834                 }
2835                 if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
2836                     (softc->blkno != (daddr_t) -1)) {
2837                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2838                                 u_int32_t l;
2839                                 if (softc->blk_shift != 0) {
2840                                         l = bp->bio_bcount >>
2841                                                 softc->blk_shift;
2842                                 } else {
2843                                         l = bp->bio_bcount /
2844                                                 softc->media_blksize;
2845                                 }
2846                                 softc->blkno += (daddr_t) l;
2847                         } else {
2848                                 softc->blkno++;
2849                         }
2850                 }
2851         }
2852         /*
2853          * If we had an error (immediate or pending),
2854          * release the device queue now.
2855          */
2856         if (error || (softc->flags & SA_FLAG_ERR_PENDING))
2857                 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
2858         if (error || bp->bio_resid) {
2859                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2860                           ("error %d resid %ld count %ld\n", error,
2861                           bp->bio_resid, bp->bio_bcount));
2862         }
2863         biofinish(bp, softc->device_stats, 0);
2864         xpt_release_ccb(done_ccb);
2865 }
2866
2867 /*
2868  * Mount the tape (make sure it's ready for I/O).
2869  */
2870 static int
2871 samount(struct cam_periph *periph, int oflags, struct cdev *dev)
2872 {
2873         struct  sa_softc *softc;
2874         union   ccb *ccb;
2875         int     error;
2876
2877         /*
2878          * oflags can be checked for 'kind' of open (read-only check) - later
2879          * dev can be checked for a control-mode or compression open - later
2880          */
2881         UNUSED_PARAMETER(oflags);
2882         UNUSED_PARAMETER(dev);
2883
2884
2885         softc = (struct sa_softc *)periph->softc;
2886
2887         /*
2888          * This should determine if something has happened since the last
2889          * open/mount that would invalidate the mount. We do *not* want
2890          * to retry this command- we just want the status. But we only
2891          * do this if we're mounted already- if we're not mounted,
2892          * we don't care about the unit read state and can instead use
2893          * this opportunity to attempt to reserve the tape unit.
2894          */
2895
2896         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
2897                 ccb = cam_periph_getccb(periph, 1);
2898                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
2899                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
2900                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2901                     softc->device_stats);
2902                 if (error == ENXIO) {
2903                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
2904                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
2905                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
2906                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2907                             softc->device_stats);
2908                 } else if (error) {
2909                         /*
2910                          * We don't need to freeze the tape because we
2911                          * will now attempt to rewind/load it.
2912                          */
2913                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
2914                         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2915                                 xpt_print(periph->path,
2916                                     "error %d on TUR in samount\n", error);
2917                         }
2918                 }
2919         } else {
2920                 error = sareservereleaseunit(periph, TRUE);
2921                 if (error) {
2922                         return (error);
2923                 }
2924                 ccb = cam_periph_getccb(periph, 1);
2925                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
2926                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
2927                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2928                     softc->device_stats);
2929         }
2930
2931         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
2932                 struct scsi_read_block_limits_data *rblim = NULL;
2933                 int comp_enabled, comp_supported;
2934                 u_int8_t write_protect, guessing = 0;
2935
2936                 /*
2937                  * Clear out old state.
2938                  */
2939                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
2940                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMPRESSION);
2941                 softc->filemarks = 0;
2942
2943                 /*
2944                  * *Very* first off, make sure we're loaded to BOT.
2945                  */
2946                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2947                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
2948                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2949                     softc->device_stats);
2950
2951                 /*
2952                  * In case this doesn't work, do a REWIND instead
2953                  */
2954                 if (error) {
2955                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
2956                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
2957                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2958                                 softc->device_stats);
2959                 }
2960                 if (error) {
2961                         xpt_release_ccb(ccb);
2962                         goto exit;
2963                 }
2964
2965                 /*
2966                  * Do a dummy test read to force access to the
2967                  * media so that the drive will really know what's
2968                  * there. We actually don't really care what the
2969                  * blocksize on tape is and don't expect to really
2970                  * read a full record.
2971                  */
2972                 rblim = (struct  scsi_read_block_limits_data *)
2973                     malloc(8192, M_SCSISA, M_NOWAIT);
2974                 if (rblim == NULL) {
2975                         xpt_print(periph->path, "no memory for test read\n");
2976                         xpt_release_ccb(ccb);
2977                         error = ENOMEM;
2978                         goto exit;
2979                 }
2980
2981                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
2982                         scsi_sa_read_write(&ccb->csio, 0, sadone,
2983                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
2984                             (void *) rblim, 8192, SSD_FULL_SIZE,
2985                             IO_TIMEOUT);
2986                         (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2987                             softc->device_stats);
2988                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
2989                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
2990                         error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
2991                             SF_NO_PRINT | SF_RETRY_UA,
2992                             softc->device_stats);
2993                         if (error) {
2994                                 xpt_print(periph->path,
2995                                     "unable to rewind after test read\n");
2996                                 xpt_release_ccb(ccb);
2997                                 goto exit;
2998                         }
2999                 }
3000
3001                 /*
3002                  * Next off, determine block limits.
3003                  */
3004                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
3005                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3006
3007                 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
3008                     SF_NO_PRINT | SF_RETRY_UA, softc->device_stats);
3009
3010                 xpt_release_ccb(ccb);
3011
3012                 if (error != 0) {
3013                         /*
3014                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
3015                          * a MANDATORY command. Anyway- it doesn't matter-
3016                          * we can proceed anyway.
3017                          */
3018                         softc->blk_gran = 0;
3019                         softc->max_blk = ~0;
3020                         softc->min_blk = 0;
3021                 } else {
3022                         if (softc->scsi_rev >= SCSI_REV_SPC) {
3023                                 softc->blk_gran = RBL_GRAN(rblim);
3024                         } else {
3025                                 softc->blk_gran = 0;
3026                         }
3027                         /*
3028                          * We take max_blk == min_blk to mean a default to
3029                          * fixed mode- but note that whatever we get out of
3030                          * sagetparams below will actually determine whether
3031                          * we are actually *in* fixed mode.
3032                          */
3033                         softc->max_blk = scsi_3btoul(rblim->maximum);
3034                         softc->min_blk = scsi_2btoul(rblim->minimum);
3035
3036
3037                 }
3038                 /*
3039                  * Next, perform a mode sense to determine
3040                  * current density, blocksize, compression etc.
3041                  */
3042                 error = sagetparams(periph, SA_PARAM_ALL,
3043                                     &softc->media_blksize,
3044                                     &softc->media_density,
3045                                     &softc->media_numblks,
3046                                     &softc->buffer_mode, &write_protect,
3047                                     &softc->speed, &comp_supported,
3048                                     &comp_enabled, &softc->comp_algorithm,
3049                                     NULL, NULL, 0, 0);
3050
3051                 if (error != 0) {
3052                         /*
3053                          * We could work a little harder here. We could
3054                          * adjust our attempts to get information. It
3055                          * might be an ancient tape drive. If someone
3056                          * nudges us, we'll do that.
3057                          */
3058                         goto exit;
3059                 }
3060
3061                 /*
3062                  * If no quirk has determined that this is a device that is
3063                  * preferred to be in fixed or variable mode, now is the time
3064                  * to find out.
3065                  */
3066                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
3067                         guessing = 1;
3068                         /*
3069                          * This could be expensive to find out. Luckily we
3070                          * only need to do this once. If we start out in
3071                          * 'default' mode, try and set ourselves to one
3072                          * of the densities that would determine a wad
3073                          * of other stuff. Go from highest to lowest.
3074                          */
3075                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
3076                                 int i;
3077                                 static u_int8_t ctry[] = {
3078                                         SCSI_DENSITY_HALFINCH_PE,
3079                                         SCSI_DENSITY_HALFINCH_6250C,
3080                                         SCSI_DENSITY_HALFINCH_6250,
3081                                         SCSI_DENSITY_HALFINCH_1600,
3082                                         SCSI_DENSITY_HALFINCH_800,
3083                                         SCSI_DENSITY_QIC_4GB,
3084                                         SCSI_DENSITY_QIC_2GB,
3085                                         SCSI_DENSITY_QIC_525_320,
3086                                         SCSI_DENSITY_QIC_150,
3087                                         SCSI_DENSITY_QIC_120,
3088                                         SCSI_DENSITY_QIC_24,
3089                                         SCSI_DENSITY_QIC_11_9TRK,
3090                                         SCSI_DENSITY_QIC_11_4TRK,
3091                                         SCSI_DENSITY_QIC_1320,
3092                                         SCSI_DENSITY_QIC_3080,
3093                                         0
3094                                 };
3095                                 for (i = 0; ctry[i]; i++) {
3096                                         error = sasetparams(periph,
3097                                             SA_PARAM_DENSITY, 0, ctry[i],
3098                                             0, SF_NO_PRINT);
3099                                         if (error == 0) {
3100                                                 softc->media_density = ctry[i];
3101                                                 break;
3102                                         }
3103                                 }
3104                         }
3105                         switch (softc->media_density) {
3106                         case SCSI_DENSITY_QIC_11_4TRK:
3107                         case SCSI_DENSITY_QIC_11_9TRK:
3108                         case SCSI_DENSITY_QIC_24:
3109                         case SCSI_DENSITY_QIC_120:
3110                         case SCSI_DENSITY_QIC_150:
3111                         case SCSI_DENSITY_QIC_525_320:
3112                         case SCSI_DENSITY_QIC_1320:
3113                         case SCSI_DENSITY_QIC_3080:
3114                                 softc->quirks &= ~SA_QUIRK_2FM;
3115                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
3116                                 softc->last_media_blksize = 512;
3117                                 break;
3118                         case SCSI_DENSITY_QIC_4GB:
3119                         case SCSI_DENSITY_QIC_2GB:
3120                                 softc->quirks &= ~SA_QUIRK_2FM;
3121                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
3122                                 softc->last_media_blksize = 1024;
3123                                 break;
3124                         default:
3125                                 softc->last_media_blksize =
3126                                     softc->media_blksize;
3127                                 softc->quirks |= SA_QUIRK_VARIABLE;
3128                                 break;
3129                         }
3130                 }
3131
3132                 /*
3133                  * If no quirk has determined that this is a device that needs
3134                  * to have 2 Filemarks at EOD, now is the time to find out.
3135                  */
3136
3137                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
3138                         switch (softc->media_density) {
3139                         case SCSI_DENSITY_HALFINCH_800:
3140                         case SCSI_DENSITY_HALFINCH_1600:
3141                         case SCSI_DENSITY_HALFINCH_6250:
3142                         case SCSI_DENSITY_HALFINCH_6250C:
3143                         case SCSI_DENSITY_HALFINCH_PE:
3144                                 softc->quirks &= ~SA_QUIRK_1FM;
3145                                 softc->quirks |= SA_QUIRK_2FM;
3146                                 break;
3147                         default:
3148                                 break;
3149                         }
3150                 }
3151
3152                 /*
3153                  * Now validate that some info we got makes sense.
3154                  */
3155                 if ((softc->max_blk < softc->media_blksize) ||
3156                     (softc->min_blk > softc->media_blksize &&
3157                     softc->media_blksize)) {
3158                         xpt_print(periph->path,
3159                             "BLOCK LIMITS (%d..%d) could not match current "
3160                             "block settings (%d)- adjusting\n", softc->min_blk,
3161                             softc->max_blk, softc->media_blksize);
3162                         softc->max_blk = softc->min_blk =
3163                             softc->media_blksize;
3164                 }
3165
3166                 /*
3167                  * Now put ourselves into the right frame of mind based
3168                  * upon quirks...
3169                  */
3170 tryagain:
3171                 /*
3172                  * If we want to be in FIXED mode and our current blocksize
3173                  * is not equal to our last blocksize (if nonzero), try and
3174                  * set ourselves to this last blocksize (as the 'preferred'
3175                  * block size).  The initial quirkmatch at registry sets the
3176                  * initial 'last' blocksize. If, for whatever reason, this
3177                  * 'last' blocksize is zero, set the blocksize to 512,
3178                  * or min_blk if that's larger.
3179                  */
3180                 if ((softc->quirks & SA_QUIRK_FIXED) &&
3181                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
3182                     (softc->media_blksize != softc->last_media_blksize)) {
3183                         softc->media_blksize = softc->last_media_blksize;
3184                         if (softc->media_blksize == 0) {
3185                                 softc->media_blksize = 512;
3186                                 if (softc->media_blksize < softc->min_blk) {
3187                                         softc->media_blksize = softc->min_blk;
3188                                 }
3189                         }
3190                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
3191                             softc->media_blksize, 0, 0, SF_NO_PRINT);
3192                         if (error) {
3193                                 xpt_print(periph->path,
3194                                     "unable to set fixed blocksize to %d\n",
3195                                     softc->media_blksize);
3196                                 goto exit;
3197                         }
3198                 }
3199
3200                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
3201                     (softc->media_blksize != 0)) {
3202                         softc->last_media_blksize = softc->media_blksize;
3203                         softc->media_blksize = 0;
3204                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
3205                             0, 0, 0, SF_NO_PRINT);
3206                         if (error) {
3207                                 /*
3208                                  * If this fails and we were guessing, just
3209                                  * assume that we got it wrong and go try
3210                                  * fixed block mode. Don't even check against
3211                                  * density code at this point.
3212                                  */
3213                                 if (guessing) {
3214                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
3215                                         softc->quirks |= SA_QUIRK_FIXED;
3216                                         if (softc->last_media_blksize == 0)
3217                                                 softc->last_media_blksize = 512;
3218                                         goto tryagain;
3219                                 }
3220                                 xpt_print(periph->path,
3221                                     "unable to set variable blocksize\n");
3222                                 goto exit;
3223                         }
3224                 }
3225
3226                 /*
3227                  * Now that we have the current block size,
3228                  * set up some parameters for sastart's usage.
3229                  */
3230                 if (softc->media_blksize) {
3231                         softc->flags |= SA_FLAG_FIXED;
3232                         if (powerof2(softc->media_blksize)) {
3233                                 softc->blk_shift =
3234                                     ffs(softc->media_blksize) - 1;
3235                                 softc->blk_mask = softc->media_blksize - 1;
3236                         } else {
3237                                 softc->blk_mask = ~0;
3238                                 softc->blk_shift = 0;
3239                         }
3240                 } else {
3241                         /*
3242                          * The SCSI-3 spec allows 0 to mean "unspecified".
3243                          * The SCSI-1 spec allows 0 to mean 'infinite'.
3244                          *
3245                          * Either works here.
3246                          */
3247                         if (softc->max_blk == 0) {
3248                                 softc->max_blk = ~0;
3249                         }
3250                         softc->blk_shift = 0;
3251                         if (softc->blk_gran != 0) {
3252                                 softc->blk_mask = softc->blk_gran - 1;
3253                         } else {
3254                                 softc->blk_mask = 0;
3255                         }
3256                 }
3257
3258                 if (write_protect)
3259                         softc->flags |= SA_FLAG_TAPE_WP;
3260
3261                 if (comp_supported) {
3262                         if (softc->saved_comp_algorithm == 0)
3263                                 softc->saved_comp_algorithm =
3264                                     softc->comp_algorithm;
3265                         softc->flags |= SA_FLAG_COMP_SUPP;
3266                         if (comp_enabled)
3267                                 softc->flags |= SA_FLAG_COMP_ENABLED;
3268                 } else
3269                         softc->flags |= SA_FLAG_COMP_UNSUPP;
3270
3271                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
3272                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
3273                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
3274                             0, 0, SF_NO_PRINT);
3275                         if (error == 0) {
3276                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
3277                         } else {
3278                                 xpt_print(periph->path,
3279                                     "unable to set buffered mode\n");
3280                         }
3281                         error = 0;      /* not an error */
3282                 }
3283
3284
3285                 if (error == 0) {
3286                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
3287                 }
3288 exit:
3289                 if (rblim != NULL)
3290                         free(rblim, M_SCSISA);
3291
3292                 if (error != 0) {
3293                         softc->dsreg = MTIO_DSREG_NIL;
3294                 } else {
3295                         softc->fileno = softc->blkno = 0;
3296                         softc->rep_fileno = softc->rep_blkno = -1;
3297                         softc->partition = 0;
3298                         softc->dsreg = MTIO_DSREG_REST;
3299                 }
3300 #ifdef  SA_1FM_AT_EOD
3301                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
3302                         softc->quirks |= SA_QUIRK_1FM;
3303 #else
3304                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
3305                         softc->quirks |= SA_QUIRK_2FM;
3306 #endif
3307         } else
3308                 xpt_release_ccb(ccb);
3309
3310         /*
3311          * If we return an error, we're not mounted any more,
3312          * so release any device reservation.
3313          */
3314         if (error != 0) {
3315                 (void) sareservereleaseunit(periph, FALSE);
3316         } else {
3317                 /*
3318                  * Clear I/O residual.
3319                  */
3320                 softc->last_io_resid = 0;
3321                 softc->last_ctl_resid = 0;
3322         }
3323         return (error);
3324 }
3325
3326 /*
3327  * How many filemarks do we need to write if we were to terminate the
3328  * tape session right now? Note that this can be a negative number
3329  */
3330
3331 static int
3332 samarkswanted(struct cam_periph *periph)
3333 {
3334         int     markswanted;
3335         struct  sa_softc *softc;
3336
3337         softc = (struct sa_softc *)periph->softc;
3338         markswanted = 0;
3339         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
3340                 markswanted++;
3341                 if (softc->quirks & SA_QUIRK_2FM)
3342                         markswanted++;
3343         }
3344         markswanted -= softc->filemarks;
3345         return (markswanted);
3346 }
3347
3348 static int
3349 sacheckeod(struct cam_periph *periph)
3350 {
3351         int     error;
3352         int     markswanted;
3353
3354         markswanted = samarkswanted(periph);
3355
3356         if (markswanted > 0) {
3357                 error = sawritefilemarks(periph, markswanted, FALSE, FALSE);
3358         } else {
3359                 error = 0;
3360         }
3361         return (error);
3362 }
3363
3364 static int
3365 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
3366 {
3367         static const char *toobig =
3368             "%d-byte tape record bigger than supplied buffer\n";
3369         struct  cam_periph *periph;
3370         struct  sa_softc *softc;
3371         struct  ccb_scsiio *csio;
3372         struct  scsi_sense_data *sense;
3373         uint64_t resid = 0;
3374         int64_t info = 0;
3375         cam_status status;
3376         int error_code, sense_key, asc, ascq, error, aqvalid, stream_valid;
3377         int sense_len;
3378         uint8_t stream_bits;
3379
3380         periph = xpt_path_periph(ccb->ccb_h.path);
3381         softc = (struct sa_softc *)periph->softc;
3382         csio = &ccb->csio;
3383         sense = &csio->sense_data;
3384         sense_len = csio->sense_len - csio->sense_resid;
3385         scsi_extract_sense_len(sense, sense_len, &error_code, &sense_key,
3386             &asc, &ascq, /*show_errors*/ 1);
3387         if (asc != -1 && ascq != -1)
3388                 aqvalid = 1;
3389         else
3390                 aqvalid = 0;
3391         if (scsi_get_stream_info(sense, sense_len, NULL, &stream_bits) == 0)
3392                 stream_valid = 1;
3393         else
3394                 stream_valid = 0;
3395         error = 0;
3396
3397         status = csio->ccb_h.status & CAM_STATUS_MASK;
3398
3399         /*
3400          * Calculate/latch up, any residuals... We do this in a funny 2-step
3401          * so we can print stuff here if we have CAM_DEBUG enabled for this
3402          * unit.
3403          */
3404         if (status == CAM_SCSI_STATUS_ERROR) {
3405                 if (scsi_get_sense_info(sense, sense_len, SSD_DESC_INFO, &resid,
3406                                         &info) == 0) {
3407                         if ((softc->flags & SA_FLAG_FIXED) != 0)
3408                                 resid *= softc->media_blksize;
3409                 } else {
3410                         resid = csio->dxfer_len;
3411                         info = resid;
3412                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
3413                                 if (softc->media_blksize)
3414                                         info /= softc->media_blksize;
3415                         }
3416                 }
3417                 if (csio->cdb_io.cdb_bytes[0] == SA_READ ||
3418                     csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
3419                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
3420                             sizeof (struct scsi_sense_data));
3421                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
3422                             (int) csio->cdb_len);
3423                         softc->last_io_resid = resid;
3424                         softc->last_resid_was_io = 1;
3425                 } else {
3426                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
3427                             sizeof (struct scsi_sense_data));
3428                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
3429                             (int) csio->cdb_len);
3430                         softc->last_ctl_resid = resid;
3431                         softc->last_resid_was_io = 0;
3432                 }
3433                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
3434                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %jd "
3435                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
3436                     sense_key, asc, ascq, status,
3437                     (stream_valid) ? stream_bits : 0, (intmax_t)resid,
3438                     csio->dxfer_len));
3439         } else {
3440                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
3441                     ("Cam Status 0x%x\n", status));
3442         }
3443
3444         switch (status) {
3445         case CAM_REQ_CMP:
3446                 return (0);
3447         case CAM_SCSI_STATUS_ERROR:
3448                 /*
3449                  * If a read/write command, we handle it here.
3450                  */
3451                 if (csio->cdb_io.cdb_bytes[0] == SA_READ ||
3452                     csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
3453                         break;
3454                 }
3455                 /*
3456                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
3457                  * on a non read/write command, we assume it's not an error
3458                  * and propagate the residule and return.
3459                  */
3460                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
3461                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
3462                         csio->resid = resid;
3463                         QFRLS(ccb);
3464                         return (0);
3465                 }
3466                 /*
3467                  * Otherwise, we let the common code handle this.
3468                  */
3469                 return (cam_periph_error(ccb, cflgs, sflgs));
3470
3471         /*
3472          * XXX: To Be Fixed
3473          * We cannot depend upon CAM honoring retry counts for these.
3474          */
3475         case CAM_SCSI_BUS_RESET:
3476         case CAM_BDR_SENT:
3477                 if (ccb->ccb_h.retry_count <= 0) {
3478                         return (EIO);
3479                 }
3480                 /* FALLTHROUGH */
3481         default:
3482                 return (cam_periph_error(ccb, cflgs, sflgs));
3483         }
3484
3485         /*
3486          * Handle filemark, end of tape, mismatched record sizes....
3487          * From this point out, we're only handling read/write cases.
3488          * Handle writes && reads differently.
3489          */
3490
3491         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
3492                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
3493                         csio->resid = resid;
3494                         error = ENOSPC;
3495                 } else if ((stream_valid != 0) && (stream_bits & SSD_EOM)) {
3496                         softc->flags |= SA_FLAG_EOM_PENDING;
3497                         /*
3498                          * Grotesque as it seems, the few times
3499                          * I've actually seen a non-zero resid,
3500                          * the tape drive actually lied and had
3501                          * written all the data!.
3502                          */
3503                         csio->resid = 0;
3504                 }
3505         } else {
3506                 csio->resid = resid;
3507                 if (sense_key == SSD_KEY_BLANK_CHECK) {
3508                         if (softc->quirks & SA_QUIRK_1FM) {
3509                                 error = 0;
3510                                 softc->flags |= SA_FLAG_EOM_PENDING;
3511                         } else {
3512                                 error = EIO;
3513                         }
3514                 } else if ((stream_valid != 0) && (stream_bits & SSD_FILEMARK)){
3515                         if (softc->flags & SA_FLAG_FIXED) {
3516                                 error = -1;
3517                                 softc->flags |= SA_FLAG_EOF_PENDING;
3518                         }
3519                         /*
3520                          * Unconditionally, if we detected a filemark on a read,
3521                          * mark that we've run moved a file ahead.
3522                          */
3523                         if (softc->fileno != (daddr_t) -1) {
3524                                 softc->fileno++;
3525                                 softc->blkno = 0;
3526                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
3527                         }
3528                 }
3529         }
3530
3531         /*
3532          * Incorrect Length usually applies to read, but can apply to writes.
3533          */
3534         if (error == 0 && (stream_valid != 0) && (stream_bits & SSD_ILI)) {
3535                 if (info < 0) {
3536                         xpt_print(csio->ccb_h.path, toobig,
3537                             csio->dxfer_len - info);
3538                         csio->resid = csio->dxfer_len;
3539                         error = EIO;
3540                 } else {
3541                         csio->resid = resid;
3542                         if (softc->flags & SA_FLAG_FIXED) {
3543                                 softc->flags |= SA_FLAG_EIO_PENDING;
3544                         }
3545                         /*
3546                          * Bump the block number if we hadn't seen a filemark.
3547                          * Do this independent of errors (we've moved anyway).
3548                          */
3549                         if ((stream_valid == 0) ||
3550                             (stream_bits & SSD_FILEMARK) == 0) {
3551                                 if (softc->blkno != (daddr_t) -1) {
3552                                         softc->blkno++;
3553                                         csio->ccb_h.ccb_pflags |=
3554                                            SA_POSITION_UPDATED;
3555                                 }
3556                         }
3557                 }
3558         }
3559
3560         if (error <= 0) {
3561                 /*
3562                  * Unfreeze the queue if frozen as we're not returning anything
3563                  * to our waiters that would indicate an I/O error has occurred
3564                  * (yet).
3565                  */
3566                 QFRLS(ccb);
3567                 error = 0;
3568         }
3569         return (error);
3570 }
3571
3572 static int
3573 sagetparams(struct cam_periph *periph, sa_params params_to_get,
3574             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
3575             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
3576             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
3577             sa_comp_t *tcs, struct scsi_control_data_prot_subpage *prot_page,
3578             int dp_size, int prot_changeable)
3579 {
3580         union ccb *ccb;
3581         void *mode_buffer;
3582         struct scsi_mode_header_6 *mode_hdr;
3583         struct scsi_mode_blk_desc *mode_blk;
3584         int mode_buffer_len;
3585         struct sa_softc *softc;
3586         u_int8_t cpage;
3587         int error;
3588         cam_status status;
3589
3590         softc = (struct sa_softc *)periph->softc;
3591         ccb = cam_periph_getccb(periph, 1);
3592         if (softc->quirks & SA_QUIRK_NO_CPAGE)
3593                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
3594         else
3595                 cpage = SA_DATA_COMPRESSION_PAGE;
3596
3597 retry:
3598         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
3599
3600         if (params_to_get & SA_PARAM_COMPRESSION) {
3601                 if (softc->quirks & SA_QUIRK_NOCOMP) {
3602                         *comp_supported = FALSE;
3603                         params_to_get &= ~SA_PARAM_COMPRESSION;
3604                 } else
3605                         mode_buffer_len += sizeof (sa_comp_t);
3606         }
3607
3608         /* XXX Fix M_NOWAIT */
3609         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
3610         if (mode_buffer == NULL) {
3611                 xpt_release_ccb(ccb);
3612                 return (ENOMEM);
3613         }
3614         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
3615         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
3616
3617         /* it is safe to retry this */
3618         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3619             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
3620             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
3621             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3622
3623         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
3624             softc->device_stats);
3625
3626         status = ccb->ccb_h.status & CAM_STATUS_MASK;
3627
3628         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
3629                 /*
3630                  * Hmm. Let's see if we can try another page...
3631                  * If we've already done that, give up on compression
3632                  * for this device and remember this for the future
3633                  * and attempt the request without asking for compression
3634                  * info.
3635                  */
3636                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
3637                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
3638                         goto retry;
3639                 }
3640                 softc->quirks |= SA_QUIRK_NOCOMP;
3641                 free(mode_buffer, M_SCSISA);
3642                 goto retry;
3643         } else if (status == CAM_SCSI_STATUS_ERROR) {
3644                 /* Tell the user about the fatal error. */
3645                 scsi_sense_print(&ccb->csio);
3646                 goto sagetparamsexit;
3647         }
3648
3649         /*
3650          * If the user only wants the compression information, and
3651          * the device doesn't send back the block descriptor, it's
3652          * no big deal.  If the user wants more than just
3653          * compression, though, and the device doesn't pass back the
3654          * block descriptor, we need to send another mode sense to
3655          * get the block descriptor.
3656          */
3657         if ((mode_hdr->blk_desc_len == 0) &&
3658             (params_to_get & SA_PARAM_COMPRESSION) &&
3659             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
3660
3661                 /*
3662                  * Decrease the mode buffer length by the size of
3663                  * the compression page, to make sure the data
3664                  * there doesn't get overwritten.
3665                  */
3666                 mode_buffer_len -= sizeof (sa_comp_t);
3667
3668                 /*
3669                  * Now move the compression page that we presumably
3670                  * got back down the memory chunk a little bit so
3671                  * it doesn't get spammed.
3672                  */
3673                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
3674                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
3675
3676                 /*
3677                  * Now, we issue another mode sense and just ask
3678                  * for the block descriptor, etc.
3679                  */
3680
3681                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3682                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
3683                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
3684                     SCSIOP_TIMEOUT);
3685
3686                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
3687                     softc->device_stats);
3688
3689                 if (error != 0)
3690                         goto sagetparamsexit;
3691         }
3692
3693         if (params_to_get & SA_PARAM_BLOCKSIZE)
3694                 *blocksize = scsi_3btoul(mode_blk->blklen);
3695
3696         if (params_to_get & SA_PARAM_NUMBLOCKS)
3697                 *numblocks = scsi_3btoul(mode_blk->nblocks);
3698
3699         if (params_to_get & SA_PARAM_BUFF_MODE)
3700                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
3701
3702         if (params_to_get & SA_PARAM_DENSITY)
3703                 *density = mode_blk->density;
3704
3705         if (params_to_get & SA_PARAM_WP)
3706                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
3707
3708         if (params_to_get & SA_PARAM_SPEED)
3709                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
3710
3711         if (params_to_get & SA_PARAM_COMPRESSION) {
3712                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
3713                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
3714                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
3715                         *comp_supported =
3716                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
3717                         *comp_enabled =
3718                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
3719                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
3720                 } else {
3721                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
3722                         /*
3723                          * We don't really know whether this device supports
3724                          * Data Compression if the algorithm field is
3725                          * zero. Just say we do.
3726                          */
3727                         *comp_supported = TRUE;
3728                         *comp_enabled =
3729                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
3730                         *comp_algorithm = cp->sel_comp_alg;
3731                 }
3732                 if (tcs != NULL)
3733                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
3734         }
3735
3736         if ((params_to_get & SA_PARAM_DENSITY_EXT)
3737          && (softc->scsi_rev >= SCSI_REV_SPC)) {
3738                 int i;
3739
3740                 for (i = 0; i < SA_DENSITY_TYPES; i++) {
3741                         scsi_report_density_support(&ccb->csio,
3742                             /*retries*/ 1,
3743                             /*cbfcnp*/ sadone,
3744                             /*tag_action*/ MSG_SIMPLE_Q_TAG,
3745                             /*media*/ softc->density_type_bits[i] & SRDS_MEDIA,
3746                             /*medium_type*/ softc->density_type_bits[i] &
3747                                             SRDS_MEDIUM_TYPE,
3748                             /*data_ptr*/ softc->density_info[i],
3749                             /*length*/ sizeof(softc->density_info[i]),
3750                             /*sense_len*/ SSD_FULL_SIZE,
3751                             /*timeout*/ REP_DENSITY_TIMEOUT);
3752                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
3753                             softc->device_stats);
3754                         status = ccb->ccb_h.status & CAM_STATUS_MASK;
3755
3756                         /*
3757                          * Some tape drives won't support this command at
3758                          * all, but hopefully we'll minimize that with the
3759                          * check for SPC or greater support above.  If they
3760                          * don't support the default report (neither the
3761                          * MEDIA or MEDIUM_TYPE bits set), then there is
3762                          * really no point in continuing on to look for
3763                          * other reports.
3764                          */
3765                         if ((error != 0)
3766                          || (status != CAM_REQ_CMP)) {
3767                                 error = 0;
3768                                 softc->density_info_valid[i] = 0;
3769                                 if (softc->density_type_bits[i] == 0)
3770                                         break;
3771                                 else
3772                                         continue;
3773                         }
3774                         softc->density_info_valid[i] = ccb->csio.dxfer_len -
3775                             ccb->csio.resid;
3776                 }
3777         }
3778
3779         /*
3780          * Get logical block protection parameters if the drive supports it.
3781          */
3782         if ((params_to_get & SA_PARAM_LBP)
3783          && (softc->flags & SA_FLAG_PROTECT_SUPP)) {
3784                 struct scsi_mode_header_10 *mode10_hdr;
3785                 struct scsi_control_data_prot_subpage *dp_page;
3786                 struct scsi_mode_sense_10 *cdb;
3787                 struct sa_prot_state *prot;
3788                 int dp_len, returned_len;
3789
3790                 if (dp_size == 0)
3791                         dp_size = sizeof(*dp_page);
3792
3793                 dp_len = sizeof(*mode10_hdr) + dp_size;
3794                 mode10_hdr = malloc(dp_len, M_SCSISA, M_NOWAIT | M_ZERO);
3795                 if (mode10_hdr == NULL) {
3796                         error = ENOMEM;
3797                         goto sagetparamsexit;
3798                 }
3799
3800                 scsi_mode_sense_len(&ccb->csio,
3801                                     /*retries*/ 5,
3802                                     /*cbfcnp*/ sadone,
3803                                     /*tag_action*/ MSG_SIMPLE_Q_TAG,
3804                                     /*dbd*/ TRUE,
3805                                     /*page_code*/ (prot_changeable == 0) ?
3806                                                   SMS_PAGE_CTRL_CURRENT :
3807                                                   SMS_PAGE_CTRL_CHANGEABLE,
3808                                     /*page*/ SMS_CONTROL_MODE_PAGE,
3809                                     /*param_buf*/ (uint8_t *)mode10_hdr,
3810                                     /*param_len*/ dp_len,
3811                                     /*minimum_cmd_size*/ 10,
3812                                     /*sense_len*/ SSD_FULL_SIZE,
3813                                     /*timeout*/ SCSIOP_TIMEOUT);
3814                 /*
3815                  * XXX KDM we need to be able to set the subpage in the
3816                  * fill function.
3817                  */
3818                 cdb = (struct scsi_mode_sense_10 *)ccb->csio.cdb_io.cdb_bytes;
3819                 cdb->subpage = SA_CTRL_DP_SUBPAGE_CODE;
3820
3821                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
3822                     softc->device_stats);
3823                 if (error != 0) {
3824                         free(mode10_hdr, M_SCSISA);
3825                         goto sagetparamsexit;
3826                 }
3827
3828                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
3829                 if (status != CAM_REQ_CMP) {
3830                         error = EINVAL;
3831                         free(mode10_hdr, M_SCSISA);
3832                         goto sagetparamsexit;
3833                 }
3834
3835                 /*
3836                  * The returned data length at least has to be long enough
3837                  * for us to look at length in the mode page header.
3838                  */
3839                 returned_len = ccb->csio.dxfer_len - ccb->csio.resid;
3840                 if (returned_len < sizeof(mode10_hdr->data_length)) {
3841                         error = EINVAL;
3842                         free(mode10_hdr, M_SCSISA);
3843                         goto sagetparamsexit;
3844                 }
3845
3846                 returned_len = min(returned_len,
3847                     sizeof(mode10_hdr->data_length) +
3848                     scsi_2btoul(mode10_hdr->data_length));
3849
3850                 dp_page = (struct scsi_control_data_prot_subpage *)
3851                     &mode10_hdr[1];
3852
3853                 /*
3854                  * We also have to have enough data to include the prot_bits
3855                  * in the subpage.
3856                  */
3857                 if (returned_len < (sizeof(*mode10_hdr) +
3858                     __offsetof(struct scsi_control_data_prot_subpage, prot_bits)
3859                     + sizeof(dp_page->prot_bits))) {
3860                         error = EINVAL;
3861                         free(mode10_hdr, M_SCSISA);
3862                         goto sagetparamsexit;
3863                 }
3864
3865                 prot = &softc->prot_info.cur_prot_state;
3866                 prot->prot_method = dp_page->prot_method;
3867                 prot->pi_length = dp_page->pi_length &
3868                     SA_CTRL_DP_PI_LENGTH_MASK;
3869                 prot->lbp_w = (dp_page->prot_bits & SA_CTRL_DP_LBP_W) ? 1 :0;
3870                 prot->lbp_r = (dp_page->prot_bits & SA_CTRL_DP_LBP_R) ? 1 :0;
3871                 prot->rbdp = (dp_page->prot_bits & SA_CTRL_DP_RBDP) ? 1 :0;
3872                 prot->initialized = 1;
3873
3874                 if (prot_page != NULL)
3875                         bcopy(dp_page, prot_page, min(sizeof(*prot_page),
3876                             sizeof(*dp_page)));
3877
3878                 free(mode10_hdr, M_SCSISA);
3879         }
3880
3881         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3882                 int idx;
3883                 char *xyz = mode_buffer;
3884                 xpt_print_path(periph->path);
3885                 printf("Mode Sense Data=");
3886                 for (idx = 0; idx < mode_buffer_len; idx++)
3887                         printf(" 0x%02x", xyz[idx] & 0xff);
3888                 printf("\n");
3889         }
3890
3891 sagetparamsexit:
3892
3893         xpt_release_ccb(ccb);
3894         free(mode_buffer, M_SCSISA);
3895         return (error);
3896 }
3897
3898 /*
3899  * Set protection information to the pending protection information stored
3900  * in the softc.
3901  */
3902 static int
3903 sasetprot(struct cam_periph *periph, struct sa_prot_state *new_prot)
3904 {
3905         struct sa_softc *softc;
3906         struct scsi_control_data_prot_subpage *dp_page, *dp_changeable;
3907         struct scsi_mode_header_10 *mode10_hdr, *mode10_changeable;
3908         union ccb *ccb;
3909         uint8_t current_speed;
3910         size_t dp_size, dp_page_length;
3911         int dp_len, buff_mode;
3912         int error;
3913
3914         softc = (struct sa_softc *)periph->softc;
3915         mode10_hdr = NULL;
3916         mode10_changeable = NULL;
3917         ccb = NULL;
3918
3919         /*
3920          * Start off with the size set to the actual length of the page
3921          * that we have defined.
3922          */
3923         dp_size = sizeof(*dp_changeable);
3924         dp_page_length = dp_size -
3925             __offsetof(struct scsi_control_data_prot_subpage, prot_method);
3926
3927 retry_length:
3928
3929         dp_len = sizeof(*mode10_changeable) + dp_size;
3930         mode10_changeable = malloc(dp_len, M_SCSISA, M_NOWAIT | M_ZERO);
3931         if (mode10_changeable == NULL) {
3932                 error = ENOMEM;
3933                 goto bailout;
3934         }
3935
3936         dp_changeable =
3937             (struct scsi_control_data_prot_subpage *)&mode10_changeable[1];
3938
3939         /*
3940          * First get the data protection page changeable parameters mask.
3941          * We need to know which parameters the drive supports changing.
3942          * We also need to know what the drive claims that its page length
3943          * is.  The reason is that IBM drives in particular are very picky
3944          * about the page length.  They want it (the length set in the
3945          * page structure itself) to be 28 bytes, and they want the
3946          * parameter list length specified in the mode select header to be
3947          * 40 bytes.  So, to work with IBM drives as well as any other tape
3948          * drive, find out what the drive claims the page length is, and
3949          * make sure that we match that.
3950          */
3951         error = sagetparams(periph, SA_PARAM_SPEED | SA_PARAM_LBP,
3952             NULL, NULL, NULL, &buff_mode, NULL, &current_speed, NULL, NULL,
3953             NULL, NULL, dp_changeable, dp_size, /*prot_changeable*/ 1);
3954         if (error != 0)
3955                 goto bailout;
3956
3957         if (scsi_2btoul(dp_changeable->length) > dp_page_length) {
3958                 dp_page_length = scsi_2btoul(dp_changeable->length);
3959                 dp_size = dp_page_length +
3960                     __offsetof(struct scsi_control_data_prot_subpage,
3961                     prot_method);
3962                 free(mode10_changeable, M_SCSISA);
3963                 mode10_changeable = NULL;
3964                 goto retry_length;
3965         }
3966
3967         mode10_hdr = malloc(dp_len, M_SCSISA, M_NOWAIT | M_ZERO);
3968         if (mode10_hdr == NULL) {
3969                 error = ENOMEM;
3970                 goto bailout;
3971         }
3972
3973         dp_page = (struct scsi_control_data_prot_subpage *)&mode10_hdr[1];
3974
3975         /*
3976          * Now grab the actual current settings in the page.
3977          */
3978         error = sagetparams(periph, SA_PARAM_SPEED | SA_PARAM_LBP,
3979             NULL, NULL, NULL, &buff_mode, NULL, &current_speed, NULL, NULL,
3980             NULL, NULL, dp_page, dp_size, /*prot_changeable*/ 0);
3981         if (error != 0)
3982                 goto bailout;
3983
3984         /* These two fields need to be 0 for MODE SELECT */
3985         scsi_ulto2b(0, mode10_hdr->data_length);
3986         mode10_hdr->medium_type = 0;
3987         /* We are not including a block descriptor */
3988         scsi_ulto2b(0, mode10_hdr->blk_desc_len);
3989
3990         mode10_hdr->dev_spec = current_speed;
3991         /* if set, set single-initiator buffering mode */
3992         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
3993                 mode10_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
3994         }
3995
3996         /*
3997          * For each field, make sure that the drive allows changing it
3998          * before bringing in the user's setting.
3999          */
4000         if (dp_changeable->prot_method != 0)
4001                 dp_page->prot_method = new_prot->prot_method;
4002
4003         if (dp_changeable->pi_length & SA_CTRL_DP_PI_LENGTH_MASK) {
4004                 dp_page->pi_length &= ~SA_CTRL_DP_PI_LENGTH_MASK;
4005                 dp_page->pi_length |= (new_prot->pi_length &
4006                     SA_CTRL_DP_PI_LENGTH_MASK);
4007         }
4008         if (dp_changeable->prot_bits & SA_CTRL_DP_LBP_W) {
4009                 if (new_prot->lbp_w)
4010                         dp_page->prot_bits |= SA_CTRL_DP_LBP_W;
4011                 else
4012                         dp_page->prot_bits &= ~SA_CTRL_DP_LBP_W;
4013         }
4014
4015         if (dp_changeable->prot_bits & SA_CTRL_DP_LBP_R) {
4016                 if (new_prot->lbp_r)
4017                         dp_page->prot_bits |= SA_CTRL_DP_LBP_R;
4018                 else
4019                         dp_page->prot_bits &= ~SA_CTRL_DP_LBP_R;
4020         }
4021
4022         if (dp_changeable->prot_bits & SA_CTRL_DP_RBDP) {
4023                 if (new_prot->rbdp)
4024                         dp_page->prot_bits |= SA_CTRL_DP_RBDP;
4025                 else
4026                         dp_page->prot_bits &= ~SA_CTRL_DP_RBDP;
4027         }
4028
4029         ccb = cam_periph_getccb(periph, 1);
4030
4031         scsi_mode_select_len(&ccb->csio,
4032                              /*retries*/ 5,
4033                              /*cbfcnp*/ sadone,
4034                              /*tag_action*/ MSG_SIMPLE_Q_TAG,
4035                              /*scsi_page_fmt*/ TRUE,
4036                              /*save_pages*/ FALSE,
4037                              /*param_buf*/ (uint8_t *)mode10_hdr,
4038                              /*param_len*/ dp_len,
4039                              /*minimum_cmd_size*/ 10,
4040                              /*sense_len*/ SSD_FULL_SIZE,
4041                              /*timeout*/ SCSIOP_TIMEOUT);
4042
4043         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
4044         if (error != 0)
4045                 goto bailout;
4046
4047         if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
4048                 error = EINVAL;
4049                 goto bailout;
4050         }
4051
4052         /*
4053          * The operation was successful.  We could just copy the settings
4054          * the user requested, but just in case the drive ignored some of
4055          * our settings, let's ask for status again.
4056          */
4057         error = sagetparams(periph, SA_PARAM_SPEED | SA_PARAM_LBP,
4058             NULL, NULL, NULL, &buff_mode, NULL, &current_speed, NULL, NULL,
4059             NULL, NULL, dp_page, dp_size, 0);
4060
4061 bailout:
4062         if (ccb != NULL)
4063                 xpt_release_ccb(ccb);
4064         free(mode10_hdr, M_SCSISA);
4065         free(mode10_changeable, M_SCSISA);
4066         return (error);
4067 }
4068
4069 /*
4070  * The purpose of this function is to set one of four different parameters
4071  * for a tape drive:
4072  *      - blocksize
4073  *      - density
4074  *      - compression / compression algorithm
4075  *      - buffering mode
4076  *
4077  * The assumption is that this will be called from saioctl(), and therefore
4078  * from a process context.  Thus the waiting malloc calls below.  If that
4079  * assumption ever changes, the malloc calls should be changed to be
4080  * NOWAIT mallocs.
4081  *
4082  * Any or all of the four parameters may be set when this function is
4083  * called.  It should handle setting more than one parameter at once.
4084  */
4085 static int
4086 sasetparams(struct cam_periph *periph, sa_params params_to_set,
4087             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
4088             u_int32_t sense_flags)
4089 {
4090         struct sa_softc *softc;
4091         u_int32_t current_blocksize;
4092         u_int32_t current_calg;
4093         u_int8_t current_density;
4094         u_int8_t current_speed;
4095         int comp_enabled, comp_supported;
4096         void *mode_buffer;
4097         int mode_buffer_len;
4098         struct scsi_mode_header_6 *mode_hdr;
4099         struct scsi_mode_blk_desc *mode_blk;
4100         sa_comp_t *ccomp, *cpage;
4101         int buff_mode;
4102         union ccb *ccb = NULL;
4103         int error;
4104
4105         softc = (struct sa_softc *)periph->softc;
4106
4107         ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_NOWAIT);
4108         if (ccomp == NULL)
4109                 return (ENOMEM);
4110
4111         /*
4112          * Since it doesn't make sense to set the number of blocks, or
4113          * write protection, we won't try to get the current value.  We
4114          * always want to get the blocksize, so we can set it back to the
4115          * proper value.
4116          */
4117         error = sagetparams(periph,
4118             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
4119             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
4120             &current_speed, &comp_supported, &comp_enabled,
4121             &current_calg, ccomp, NULL, 0, 0);
4122
4123         if (error != 0) {
4124                 free(ccomp, M_SCSISA);
4125                 return (error);
4126         }
4127
4128         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
4129         if (params_to_set & SA_PARAM_COMPRESSION)
4130                 mode_buffer_len += sizeof (sa_comp_t);
4131
4132         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
4133         if (mode_buffer == NULL) {
4134                 free(ccomp, M_SCSISA);
4135                 return (ENOMEM);
4136         }
4137
4138         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
4139         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
4140
4141         ccb = cam_periph_getccb(periph, 1);
4142
4143 retry:
4144
4145         if (params_to_set & SA_PARAM_COMPRESSION) {
4146                 if (mode_blk) {
4147                         cpage = (sa_comp_t *)&mode_blk[1];
4148                 } else {
4149                         cpage = (sa_comp_t *)&mode_hdr[1];
4150                 }
4151                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
4152                 cpage->hdr.pagecode &= ~0x80;
4153         } else
4154                 cpage = NULL;
4155
4156         /*
4157          * If the caller wants us to set the blocksize, use the one they
4158          * pass in.  Otherwise, use the blocksize we got back from the
4159          * mode select above.
4160          */
4161         if (mode_blk) {
4162                 if (params_to_set & SA_PARAM_BLOCKSIZE)
4163                         scsi_ulto3b(blocksize, mode_blk->blklen);
4164                 else
4165                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
4166
4167                 /*
4168                  * Set density if requested, else preserve old density.
4169                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
4170                  * devices, else density we've latched up in our softc.
4171                  */
4172                 if (params_to_set & SA_PARAM_DENSITY) {
4173                         mode_blk->density = density;
4174                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
4175                         mode_blk->density = SCSI_SAME_DENSITY;
4176                 } else {
4177                         mode_blk->density = softc->media_density;
4178                 }
4179         }
4180
4181         /*
4182          * For mode selects, these two fields must be zero.
4183          */
4184         mode_hdr->data_length = 0;
4185         mode_hdr->medium_type = 0;
4186
4187         /* set the speed to the current value */
4188         mode_hdr->dev_spec = current_speed;
4189
4190         /* if set, set single-initiator buffering mode */
4191         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
4192                 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
4193         }
4194
4195         if (mode_blk)
4196                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
4197         else
4198                 mode_hdr->blk_desc_len = 0;
4199
4200         /*
4201          * First, if the user wants us to set the compression algorithm or
4202          * just turn compression on, check to make sure that this drive
4203          * supports compression.
4204          */
4205         if (params_to_set & SA_PARAM_COMPRESSION) {
4206                 /*
4207                  * If the compression algorithm is 0, disable compression.
4208                  * If the compression algorithm is non-zero, enable
4209                  * compression and set the compression type to the
4210                  * specified compression algorithm, unless the algorithm is
4211                  * MT_COMP_ENABLE.  In that case, we look at the
4212                  * compression algorithm that is currently set and if it is
4213                  * non-zero, we leave it as-is.  If it is zero, and we have
4214                  * saved a compression algorithm from a time when
4215                  * compression was enabled before, set the compression to
4216                  * the saved value.
4217                  */
4218                 switch (ccomp->hdr.pagecode & ~0x80) {
4219                 case SA_DEVICE_CONFIGURATION_PAGE:
4220                 {
4221                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
4222                         if (calg == 0) {
4223                                 dcp->sel_comp_alg = SA_COMP_NONE;
4224                                 break;
4225                         }
4226                         if (calg != MT_COMP_ENABLE) {
4227                                 dcp->sel_comp_alg = calg;
4228                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
4229                             softc->saved_comp_algorithm != 0) {
4230                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
4231                         }
4232                         break;
4233                 }
4234                 case SA_DATA_COMPRESSION_PAGE:
4235                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
4236                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
4237                         if (calg == 0) {
4238                                 /*
4239                                  * Disable compression, but leave the
4240                                  * decompression and the capability bit
4241                                  * alone.
4242                                  */
4243                                 dcp->dce_and_dcc = SA_DCP_DCC;
4244                                 dcp->dde_and_red |= SA_DCP_DDE;
4245                                 break;
4246                         }
4247                         /* enable compression && decompression */
4248                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
4249                         dcp->dde_and_red |= SA_DCP_DDE;
4250                         /*
4251                          * If there, use compression algorithm from caller.
4252                          * Otherwise, if there's a saved compression algorithm
4253                          * and there is no current algorithm, use the saved
4254                          * algorithm. Else parrot back what we got and hope
4255                          * for the best.
4256                          */
4257                         if (calg != MT_COMP_ENABLE) {
4258                                 scsi_ulto4b(calg, dcp->comp_algorithm);
4259                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
4260                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
4261                             softc->saved_comp_algorithm != 0) {
4262                                 scsi_ulto4b(softc->saved_comp_algorithm,
4263                                     dcp->comp_algorithm);
4264                                 scsi_ulto4b(softc->saved_comp_algorithm,
4265                                     dcp->decomp_algorithm);
4266                         }
4267                         break;
4268                 }
4269                 /*
4270                  * Compression does not appear to be supported-
4271                  * at least via the DATA COMPRESSION page. It
4272                  * would be too much to ask us to believe that
4273                  * the page itself is supported, but incorrectly
4274                  * reports an ability to manipulate data compression,
4275                  * so we'll assume that this device doesn't support
4276                  * compression. We can just fall through for that.
4277                  */
4278                 /* FALLTHROUGH */
4279                 default:
4280                         /*
4281                          * The drive doesn't seem to support compression,
4282                          * so turn off the set compression bit.
4283                          */
4284                         params_to_set &= ~SA_PARAM_COMPRESSION;
4285                         xpt_print(periph->path,
4286                             "device does not seem to support compression\n");
4287
4288                         /*
4289                          * If that was the only thing the user wanted us to set,
4290                          * clean up allocated resources and return with
4291                          * 'operation not supported'.
4292                          */
4293                         if (params_to_set == SA_PARAM_NONE) {
4294                                 free(mode_buffer, M_SCSISA);
4295                                 xpt_release_ccb(ccb);
4296                                 return (ENODEV);
4297                         }
4298
4299                         /*
4300                          * That wasn't the only thing the user wanted us to set.
4301                          * So, decrease the stated mode buffer length by the
4302                          * size of the compression mode page.
4303                          */
4304                         mode_buffer_len -= sizeof(sa_comp_t);
4305                 }
4306         }
4307
4308         /* It is safe to retry this operation */
4309         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
4310             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
4311             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
4312
4313         error = cam_periph_runccb(ccb, saerror, 0,
4314             sense_flags, softc->device_stats);
4315
4316         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
4317                 int idx;
4318                 char *xyz = mode_buffer;
4319                 xpt_print_path(periph->path);
4320                 printf("Err%d, Mode Select Data=", error);
4321                 for (idx = 0; idx < mode_buffer_len; idx++)
4322                         printf(" 0x%02x", xyz[idx] & 0xff);
4323                 printf("\n");
4324         }
4325
4326
4327         if (error) {
4328                 /*
4329                  * If we can, try without setting density/blocksize.
4330                  */
4331                 if (mode_blk) {
4332                         if ((params_to_set &
4333                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
4334                                 mode_blk = NULL;
4335                                 goto retry;
4336                         }
4337                 } else {
4338                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
4339                         cpage = (sa_comp_t *)&mode_blk[1];
4340                 }
4341
4342                 /*
4343                  * If we were setting the blocksize, and that failed, we
4344                  * want to set it to its original value.  If we weren't
4345                  * setting the blocksize, we don't want to change it.
4346                  */
4347                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
4348
4349                 /*
4350                  * Set density if requested, else preserve old density.
4351                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
4352                  * devices, else density we've latched up in our softc.
4353                  */
4354                 if (params_to_set & SA_PARAM_DENSITY) {
4355                         mode_blk->density = current_density;
4356                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
4357                         mode_blk->density = SCSI_SAME_DENSITY;
4358                 } else {
4359                         mode_blk->density = softc->media_density;
4360                 }
4361
4362                 if (params_to_set & SA_PARAM_COMPRESSION)
4363                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
4364
4365                 /*
4366                  * The retry count is the only CCB field that might have been
4367                  * changed that we care about, so reset it back to 1.
4368                  */
4369                 ccb->ccb_h.retry_count = 1;
4370                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
4371                     softc->device_stats);
4372         }
4373
4374         xpt_release_ccb(ccb);
4375
4376         if (ccomp != NULL)
4377                 free(ccomp, M_SCSISA);
4378
4379         if (params_to_set & SA_PARAM_COMPRESSION) {
4380                 if (error) {
4381                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
4382                         /*
4383                          * Even if we get an error setting compression,
4384                          * do not say that we don't support it. We could
4385                          * have been wrong, or it may be media specific.
4386                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
4387                          */
4388                         softc->saved_comp_algorithm = softc->comp_algorithm;
4389                         softc->comp_algorithm = 0;
4390                 } else {
4391                         softc->flags |= SA_FLAG_COMP_ENABLED;
4392                         softc->comp_algorithm = calg;
4393                 }
4394         }
4395
4396         free(mode_buffer, M_SCSISA);
4397         return (error);
4398 }
4399
4400 static int
4401 saextget(struct cdev *dev, struct cam_periph *periph, struct sbuf *sb,
4402     struct mtextget *g)
4403 {
4404         int indent, error;
4405         char tmpstr[80];
4406         struct sa_softc *softc;
4407         int tmpint;
4408         uint32_t maxio_tmp;
4409         struct ccb_getdev cgd;
4410
4411         softc = (struct sa_softc *)periph->softc;
4412
4413         error = 0;
4414
4415         error = sagetparams_common(dev, periph);
4416         if (error)
4417                 goto extget_bailout;
4418         if (!SA_IS_CTRL(dev) && !softc->open_pending_mount)
4419                 sagetpos(periph);
4420
4421         indent = 0;
4422         SASBADDNODE(sb, indent, mtextget);
4423         /*
4424          * Basic CAM peripheral information.
4425          */
4426         SASBADDVARSTR(sb, indent, periph->periph_name, %s, periph_name,
4427             strlen(periph->periph_name) + 1);
4428         SASBADDUINT(sb, indent, periph->unit_number, %u, unit_number);
4429         xpt_setup_ccb(&cgd.ccb_h,
4430                       periph->path,
4431                       CAM_PRIORITY_NORMAL);
4432         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
4433         xpt_action((union ccb *)&cgd);
4434         if ((cgd.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
4435                 g->status = MT_EXT_GET_ERROR;
4436                 snprintf(g->error_str, sizeof(g->error_str),
4437                     "Error %#x returned for XPT_GDEV_TYPE CCB",
4438                     cgd.ccb_h.status);
4439                 goto extget_bailout;
4440         }
4441
4442         cam_strvis(tmpstr, cgd.inq_data.vendor,
4443             sizeof(cgd.inq_data.vendor), sizeof(tmpstr));
4444         SASBADDVARSTRDESC(sb, indent, tmpstr, %s, vendor,
4445             sizeof(cgd.inq_data.vendor) + 1, "SCSI Vendor ID");
4446
4447         cam_strvis(tmpstr, cgd.inq_data.product,
4448             sizeof(cgd.inq_data.product), sizeof(tmpstr));
4449         SASBADDVARSTRDESC(sb, indent, tmpstr, %s, product,
4450             sizeof(cgd.inq_data.product) + 1, "SCSI Product ID");
4451
4452         cam_strvis(tmpstr, cgd.inq_data.revision,
4453             sizeof(cgd.inq_data.revision), sizeof(tmpstr));
4454         SASBADDVARSTRDESC(sb, indent, tmpstr, %s, revision,
4455             sizeof(cgd.inq_data.revision) + 1, "SCSI Revision");
4456
4457         if (cgd.serial_num_len > 0) {
4458                 char *tmpstr2;
4459                 size_t ts2_len;
4460                 int ts2_malloc;
4461
4462                 ts2_len = 0;
4463
4464                 if (cgd.serial_num_len > sizeof(tmpstr)) {
4465                         ts2_len = cgd.serial_num_len + 1;
4466                         ts2_malloc = 1;
4467                         tmpstr2 = malloc(ts2_len, M_SCSISA, M_NOWAIT | M_ZERO);
4468                         /*
4469                          * The 80 characters allocated on the stack above
4470                          * will handle the vast majority of serial numbers.
4471                          * If we run into one that is larger than that, and
4472                          * we can't malloc the length without blocking,
4473                          * bail out with an out of memory error.
4474                          */
4475                         if (tmpstr2 == NULL) {
4476                                 error = ENOMEM;
4477                                 goto extget_bailout;
4478                         }
4479                 } else {
4480                         ts2_len = sizeof(tmpstr);
4481                         ts2_malloc = 0;
4482                         tmpstr2 = tmpstr;
4483                 }
4484
4485                 cam_strvis(tmpstr2, cgd.serial_num, cgd.serial_num_len,
4486                     ts2_len);
4487
4488                 SASBADDVARSTRDESC(sb, indent, tmpstr2, %s, serial_num,
4489                     (ssize_t)cgd.serial_num_len + 1, "Serial Number");
4490                 if (ts2_malloc != 0)
4491                         free(tmpstr2, M_SCSISA);
4492         } else {
4493                 /*
4494                  * We return a serial_num element in any case, but it will
4495                  * be empty if the device has no serial number.
4496                  */
4497                 tmpstr[0] = '\0';
4498                 SASBADDVARSTRDESC(sb, indent, tmpstr, %s, serial_num,
4499                     (ssize_t)0, "Serial Number");
4500         }
4501
4502         SASBADDUINTDESC(sb, indent, softc->maxio, %u, maxio,
4503             "Maximum I/O size allowed by driver and controller");
4504
4505         SASBADDUINTDESC(sb, indent, softc->cpi_maxio, %u, cpi_maxio,
4506             "Maximum I/O size reported by controller");
4507
4508         SASBADDUINTDESC(sb, indent, softc->max_blk, %u, max_blk,
4509             "Maximum block size supported by tape drive and media");
4510
4511         SASBADDUINTDESC(sb, indent, softc->min_blk, %u, min_blk,
4512             "Minimum block size supported by tape drive and media");
4513
4514         SASBADDUINTDESC(sb, indent, softc->blk_gran, %u, blk_gran,
4515             "Block granularity supported by tape drive and media");
4516
4517         maxio_tmp = min(softc->max_blk, softc->maxio);
4518
4519         SASBADDUINTDESC(sb, indent, maxio_tmp, %u, max_effective_iosize,
4520             "Maximum possible I/O size");
4521
4522         SASBADDINTDESC(sb, indent, softc->flags & SA_FLAG_FIXED ? 1 : 0, %d,
4523             fixed_mode, "Set to 1 for fixed block mode, 0 for variable block");
4524
4525         /*
4526          * XXX KDM include SIM, bus, target, LUN?
4527          */
4528         if (softc->flags & SA_FLAG_COMP_UNSUPP)
4529                 tmpint = 0;
4530         else
4531                 tmpint = 1;
4532         SASBADDINTDESC(sb, indent, tmpint, %d, compression_supported,
4533             "Set to 1 if compression is supported, 0 if not");
4534         if (softc->flags & SA_FLAG_COMP_ENABLED)
4535                 tmpint = 1;
4536         else
4537                 tmpint = 0;
4538         SASBADDINTDESC(sb, indent, tmpint, %d, compression_enabled,
4539             "Set to 1 if compression is enabled, 0 if not");
4540         SASBADDUINTDESC(sb, indent, softc->comp_algorithm, %u,
4541             compression_algorithm, "Numeric compression algorithm");
4542
4543         safillprot(softc, &indent, sb);
4544
4545         SASBADDUINTDESC(sb, indent, softc->media_blksize, %u,
4546             media_blocksize, "Block size reported by drive or set by user");
4547         SASBADDINTDESC(sb, indent, (intmax_t)softc->fileno, %jd,
4548             calculated_fileno, "Calculated file number, -1 if unknown");
4549         SASBADDINTDESC(sb, indent, (intmax_t)softc->blkno, %jd,
4550             calculated_rel_blkno, "Calculated block number relative to file, "
4551             "set to -1 if unknown");
4552         SASBADDINTDESC(sb, indent, (intmax_t)softc->rep_fileno, %jd,
4553             reported_fileno, "File number reported by drive, -1 if unknown");
4554         SASBADDINTDESC(sb, indent, (intmax_t)softc->rep_blkno, %jd,
4555             reported_blkno, "Block number relative to BOP/BOT reported by "
4556             "drive, -1 if unknown");
4557         SASBADDINTDESC(sb, indent, (intmax_t)softc->partition, %jd,
4558             partition, "Current partition number, 0 is the default");
4559         SASBADDINTDESC(sb, indent, softc->bop, %d, bop,
4560             "Set to 1 if drive is at the beginning of partition/tape, 0 if "
4561             "not, -1 if unknown");
4562         SASBADDINTDESC(sb, indent, softc->eop, %d, eop,
4563             "Set to 1 if drive is past early warning, 0 if not, -1 if unknown");
4564         SASBADDINTDESC(sb, indent, softc->bpew, %d, bpew,
4565             "Set to 1 if drive is past programmable early warning, 0 if not, "
4566             "-1 if unknown");
4567         SASBADDINTDESC(sb, indent, (intmax_t)softc->last_io_resid, %jd,
4568             residual, "Residual for the last I/O");
4569         /*
4570          * XXX KDM should we send a string with the current driver
4571          * status already decoded instead of a numeric value?
4572          */
4573         SASBADDINTDESC(sb, indent, softc->dsreg, %d, dsreg,
4574             "Current state of the driver");
4575
4576         safilldensitysb(softc, &indent, sb);
4577
4578         SASBENDNODE(sb, indent, mtextget);
4579
4580 extget_bailout:
4581
4582         return (error);
4583 }
4584
4585 static int
4586 saparamget(struct sa_softc *softc, struct sbuf *sb)
4587 {
4588         int indent;
4589
4590         indent = 0;
4591         SASBADDNODE(sb, indent, mtparamget);
4592         SASBADDINTDESC(sb, indent, softc->sili, %d, sili,
4593             "Suppress an error on underlength variable reads");
4594         SASBADDINTDESC(sb, indent, softc->eot_warn, %d, eot_warn,
4595             "Return an error to warn that end of tape is approaching");
4596         safillprot(softc, &indent, sb);
4597         SASBENDNODE(sb, indent, mtparamget);
4598
4599         return (0);
4600 }
4601
4602 static void
4603 saprevent(struct cam_periph *periph, int action)
4604 {
4605         struct  sa_softc *softc;
4606         union   ccb *ccb;
4607         int     error, sf;
4608
4609         softc = (struct sa_softc *)periph->softc;
4610
4611         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
4612                 return;
4613         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
4614                 return;
4615
4616         /*
4617          * We can be quiet about illegal requests.
4618          */
4619         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
4620                 sf = 0;
4621         } else
4622                 sf = SF_QUIET_IR;
4623
4624         ccb = cam_periph_getccb(periph, 1);
4625
4626         /* It is safe to retry this operation */
4627         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
4628             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
4629
4630         error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats);
4631         if (error == 0) {
4632                 if (action == PR_ALLOW)
4633                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
4634                 else
4635                         softc->flags |= SA_FLAG_TAPE_LOCKED;
4636         }
4637
4638         xpt_release_ccb(ccb);
4639 }
4640
4641 static int
4642 sarewind(struct cam_periph *periph)
4643 {
4644         union   ccb *ccb;
4645         struct  sa_softc *softc;
4646         int     error;
4647
4648         softc = (struct sa_softc *)periph->softc;
4649
4650         ccb = cam_periph_getccb(periph, 1);
4651
4652         /* It is safe to retry this operation */
4653         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
4654             SSD_FULL_SIZE, REWIND_TIMEOUT);
4655
4656         softc->dsreg = MTIO_DSREG_REW;
4657         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
4658         softc->dsreg = MTIO_DSREG_REST;
4659
4660         xpt_release_ccb(ccb);
4661         if (error == 0) {
4662                 softc->partition = softc->fileno = softc->blkno = (daddr_t) 0;
4663                 softc->rep_fileno = softc->rep_blkno = (daddr_t) 0;
4664         } else {
4665                 softc->fileno = softc->blkno = (daddr_t) -1;
4666                 softc->partition = (daddr_t) -1;
4667                 softc->rep_fileno = softc->rep_blkno = (daddr_t) -1;
4668         }
4669         return (error);
4670 }
4671
4672 static int
4673 saspace(struct cam_periph *periph, int count, scsi_space_code code)
4674 {
4675         union   ccb *ccb;
4676         struct  sa_softc *softc;
4677         int     error;
4678
4679         softc = (struct sa_softc *)periph->softc;
4680
4681         ccb = cam_periph_getccb(periph, 1);
4682
4683         /* This cannot be retried */
4684
4685         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
4686             SSD_FULL_SIZE, SPACE_TIMEOUT);
4687
4688         /*
4689          * Clear residual because we will be using it.
4690          */
4691         softc->last_ctl_resid = 0;
4692
4693         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
4694         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
4695         softc->dsreg = MTIO_DSREG_REST;
4696
4697         xpt_release_ccb(ccb);
4698
4699         /*
4700          * If a spacing operation has failed, we need to invalidate
4701          * this mount.
4702          *
4703          * If the spacing operation was setmarks or to end of recorded data,
4704          * we no longer know our relative position.
4705          *
4706          * If the spacing operations was spacing files in reverse, we
4707          * take account of the residual, but still check against less
4708          * than zero- if we've gone negative, we must have hit BOT.
4709          *
4710          * If the spacing operations was spacing records in reverse and
4711          * we have a residual, we've either hit BOT or hit a filemark.
4712          * In the former case, we know our new record number (0). In
4713          * the latter case, we have absolutely no idea what the real
4714          * record number is- we've stopped between the end of the last
4715          * record in the previous file and the filemark that stopped
4716          * our spacing backwards.
4717          */
4718         if (error) {
4719                 softc->fileno = softc->blkno = (daddr_t) -1;
4720                 softc->rep_blkno = softc->partition = (daddr_t) -1;
4721                 softc->rep_fileno = (daddr_t) -1;
4722         } else if (code == SS_SETMARKS || code == SS_EOD) {
4723                 softc->fileno = softc->blkno = (daddr_t) -1;
4724         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
4725                 softc->fileno += (count - softc->last_ctl_resid);
4726                 if (softc->fileno < 0)  /* we must of hit BOT */
4727                         softc->fileno = 0;
4728                 softc->blkno = 0;
4729         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
4730                 softc->blkno += (count - softc->last_ctl_resid);
4731                 if (count < 0) {
4732                         if (softc->last_ctl_resid || softc->blkno < 0) {
4733                                 if (softc->fileno == 0) {
4734                                         softc->blkno = 0;
4735                                 } else {
4736                                         softc->blkno = (daddr_t) -1;
4737                                 }
4738                         }
4739                 }
4740         }
4741         if (error == 0)
4742                 sagetpos(periph);
4743
4744         return (error);
4745 }
4746
4747 static int
4748 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks, int immed)
4749 {
4750         union   ccb *ccb;
4751         struct  sa_softc *softc;
4752         int     error, nwm = 0;
4753
4754         softc = (struct sa_softc *)periph->softc;
4755         if (softc->open_rdonly)
4756                 return (EBADF);
4757
4758         ccb = cam_periph_getccb(periph, 1);
4759         /*
4760          * Clear residual because we will be using it.
4761          */
4762         softc->last_ctl_resid = 0;
4763
4764         softc->dsreg = MTIO_DSREG_FMK;
4765         /* this *must* not be retried */
4766         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
4767             immed, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
4768         softc->dsreg = MTIO_DSREG_REST;
4769
4770
4771         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
4772
4773         if (error == 0 && nmarks) {
4774                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
4775                 nwm = nmarks - softc->last_ctl_resid;
4776                 softc->filemarks += nwm;
4777         }
4778
4779         xpt_release_ccb(ccb);
4780
4781         /*
4782          * Update relative positions (if we're doing that).
4783          */
4784         if (error) {
4785                 softc->fileno = softc->blkno = softc->partition = (daddr_t) -1;
4786         } else if (softc->fileno != (daddr_t) -1) {
4787                 softc->fileno += nwm;
4788                 softc->blkno = 0;
4789         }
4790
4791         /*
4792          * Ask the tape drive for position information.
4793          */
4794         sagetpos(periph);
4795
4796         /*
4797          * If we got valid position information, since we just wrote a file
4798          * mark, we know we're at the file mark and block 0 after that
4799          * filemark.
4800          */
4801         if (softc->rep_fileno != (daddr_t) -1) {
4802                 softc->fileno = softc->rep_fileno;
4803                 softc->blkno = 0;
4804         }
4805
4806         return (error);
4807 }
4808
4809 static int
4810 sagetpos(struct cam_periph *periph)
4811 {
4812         union ccb *ccb;
4813         struct scsi_tape_position_long_data long_pos;
4814         struct sa_softc *softc = (struct sa_softc *)periph->softc;
4815         int error;
4816
4817         if (softc->quirks & SA_QUIRK_NO_LONG_POS) {
4818                 softc->rep_fileno = (daddr_t) -1;
4819                 softc->rep_blkno = (daddr_t) -1;
4820                 softc->bop = softc->eop = softc->bpew = -1;
4821                 return (EOPNOTSUPP);
4822         }
4823
4824         bzero(&long_pos, sizeof(long_pos));
4825
4826         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
4827         scsi_read_position_10(&ccb->csio,
4828                               /*retries*/ 1,
4829                               /*cbfcnp*/ sadone,
4830                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
4831                               /*service_action*/ SA_RPOS_LONG_FORM,
4832                               /*data_ptr*/ (uint8_t *)&long_pos,
4833                               /*length*/ sizeof(long_pos),
4834                               /*sense_len*/ SSD_FULL_SIZE,
4835                               /*timeout*/ SCSIOP_TIMEOUT);
4836
4837         softc->dsreg = MTIO_DSREG_RBSY;
4838         error = cam_periph_runccb(ccb, saerror, 0, SF_QUIET_IR,
4839                                   softc->device_stats);
4840         softc->dsreg = MTIO_DSREG_REST;
4841
4842         if (error == 0) {
4843                 if (long_pos.flags & SA_RPOS_LONG_MPU) {
4844                         /*
4845                          * If the drive doesn't know what file mark it is
4846                          * on, our calculated filemark isn't going to be
4847                          * accurate either.
4848                          */
4849                         softc->fileno = (daddr_t) -1;
4850                         softc->rep_fileno = (daddr_t) -1;
4851                 } else {
4852                         softc->fileno = softc->rep_fileno =
4853                             scsi_8btou64(long_pos.logical_file_num);
4854                 }
4855
4856                 if (long_pos.flags & SA_RPOS_LONG_LONU) {
4857                         softc->partition = (daddr_t) -1;
4858                         softc->rep_blkno = (daddr_t) -1;
4859                         /*
4860                          * If the tape drive doesn't know its block
4861                          * position, we can't claim to know it either.
4862                          */
4863                         softc->blkno = (daddr_t) -1;
4864                 } else {
4865                         softc->partition = scsi_4btoul(long_pos.partition);
4866                         softc->rep_blkno =
4867                             scsi_8btou64(long_pos.logical_object_num);
4868                 }
4869                 if (long_pos.flags & SA_RPOS_LONG_BOP)
4870                         softc->bop = 1;
4871                 else
4872                         softc->bop = 0;
4873
4874                 if (long_pos.flags & SA_RPOS_LONG_EOP)
4875                         softc->eop = 1;
4876                 else
4877                         softc->eop = 0;
4878
4879                 if ((long_pos.flags & SA_RPOS_LONG_BPEW)
4880                  || (softc->set_pews_status != 0)) {
4881                         softc->bpew = 1;
4882                         if (softc->set_pews_status > 0)
4883                                 softc->set_pews_status--;
4884                 } else
4885                         softc->bpew = 0;
4886         } else if (error == EINVAL) {
4887                 /*
4888                  * If this drive returned an invalid-request type error,
4889                  * then it likely doesn't support the long form report.
4890                  */
4891                 softc->quirks |= SA_QUIRK_NO_LONG_POS;
4892         }
4893
4894         if (error != 0) {
4895                 softc->rep_fileno = softc->rep_blkno = (daddr_t) -1;
4896                 softc->partition = (daddr_t) -1;
4897                 softc->bop = softc->eop = softc->bpew = -1;
4898         }
4899
4900         xpt_release_ccb(ccb);
4901
4902         return (error);
4903 }
4904
4905 static int
4906 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
4907 {
4908         struct scsi_tape_position_data loc;
4909         union ccb *ccb;
4910         struct sa_softc *softc = (struct sa_softc *)periph->softc;
4911         int error;
4912
4913         /*
4914          * We try and flush any buffered writes here if we were writing
4915          * and we're trying to get hardware block position. It eats
4916          * up performance substantially, but I'm wary of drive firmware.
4917          *
4918          * I think that *logical* block position is probably okay-
4919          * but hardware block position might have to wait for data
4920          * to hit media to be valid. Caveat Emptor.
4921          */
4922
4923         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
4924                 error = sawritefilemarks(periph, 0, 0, 0);
4925                 if (error && error != EACCES)
4926                         return (error);
4927         }
4928
4929         ccb = cam_periph_getccb(periph, 1);
4930         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
4931             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
4932         softc->dsreg = MTIO_DSREG_RBSY;
4933         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
4934         softc->dsreg = MTIO_DSREG_REST;
4935
4936         if (error == 0) {
4937                 if (loc.flags & SA_RPOS_UNCERTAIN) {
4938                         error = EINVAL;         /* nothing is certain */
4939                 } else {
4940                         *blkptr = scsi_4btoul(loc.firstblk);
4941                 }
4942         }
4943
4944         xpt_release_ccb(ccb);
4945         return (error);
4946 }
4947
4948 static int
4949 sasetpos(struct cam_periph *periph, int hard, struct mtlocate *locate_info)
4950 {
4951         union ccb *ccb;
4952         struct sa_softc *softc;
4953         int locate16;
4954         int immed, cp;
4955         int error;
4956
4957         /*
4958          * We used to try and flush any buffered writes here.
4959          * Now we push this onto user applications to either
4960          * flush the pending writes themselves (via a zero count
4961          * WRITE FILEMARKS command) or they can trust their tape
4962          * drive to do this correctly for them.
4963          */
4964
4965         softc = (struct sa_softc *)periph->softc;
4966         ccb = cam_periph_getccb(periph, 1);
4967
4968         cp = locate_info->flags & MT_LOCATE_FLAG_CHANGE_PART ? 1 : 0;
4969         immed = locate_info->flags & MT_LOCATE_FLAG_IMMED ? 1 : 0;
4970
4971         /*
4972          * Determine whether we have to use LOCATE or LOCATE16.  The hard
4973          * bit is only possible with LOCATE, but the new ioctls do not
4974          * allow setting that bit.  So we can't get into the situation of
4975          * having the hard bit set with a block address that is larger than
4976          * 32-bits.
4977          */
4978         if (hard != 0)
4979                 locate16 = 0;
4980         else if ((locate_info->dest_type != MT_LOCATE_DEST_OBJECT)
4981               || (locate_info->block_address_mode != MT_LOCATE_BAM_IMPLICIT)
4982               || (locate_info->logical_id > SA_SPOS_MAX_BLK))
4983                 locate16 = 1;
4984         else
4985                 locate16 = 0;
4986
4987         if (locate16 != 0) {
4988                 scsi_locate_16(&ccb->csio,
4989                                /*retries*/ 1,
4990                                /*cbfcnp*/ sadone,
4991                                /*tag_action*/ MSG_SIMPLE_Q_TAG,
4992                                /*immed*/ immed,
4993                                /*cp*/ cp,
4994                                /*dest_type*/ locate_info->dest_type,
4995                                /*bam*/ locate_info->block_address_mode,
4996                                /*partition*/ locate_info->partition,
4997                                /*logical_id*/ locate_info->logical_id,
4998                                /*sense_len*/ SSD_FULL_SIZE,
4999                                /*timeout*/ SPACE_TIMEOUT);
5000         } else {
5001                 scsi_locate_10(&ccb->csio,
5002                                /*retries*/ 1,
5003                                /*cbfcnp*/ sadone,
5004                                /*tag_action*/ MSG_SIMPLE_Q_TAG,
5005                                /*immed*/ immed,
5006                                /*cp*/ cp,
5007                                /*hard*/ hard,
5008                                /*partition*/ locate_info->partition,
5009                                /*block_address*/ locate_info->logical_id,
5010                                /*sense_len*/ SSD_FULL_SIZE,
5011                                /*timeout*/ SPACE_TIMEOUT);
5012         }
5013
5014         softc->dsreg = MTIO_DSREG_POS;
5015         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
5016         softc->dsreg = MTIO_DSREG_REST;
5017         xpt_release_ccb(ccb);
5018
5019         /*
5020          * We assume the calculated file and block numbers are unknown
5021          * unless we have enough information to populate them.
5022          */
5023         softc->fileno = softc->blkno = (daddr_t) -1;
5024
5025         /*
5026          * If the user requested changing the partition and the request
5027          * succeeded, note the partition.
5028          */
5029         if ((error == 0)
5030          && (cp != 0))
5031                 softc->partition = locate_info->partition;
5032         else
5033                 softc->partition = (daddr_t) -1;
5034
5035         if (error == 0) {
5036                 switch (locate_info->dest_type) {
5037                 case MT_LOCATE_DEST_FILE:
5038                         /*
5039                          * This is the only case where we can reliably
5040                          * calculate the file and block numbers.
5041                          */
5042                         softc->fileno = locate_info->logical_id;
5043                         softc->blkno = 0;
5044                         break;
5045                 case MT_LOCATE_DEST_OBJECT:
5046                 case MT_LOCATE_DEST_SET:
5047                 case MT_LOCATE_DEST_EOD:
5048                 default:
5049                         break;
5050                 }
5051         }
5052
5053         /*
5054          * Ask the drive for current position information.
5055          */
5056         sagetpos(periph);
5057
5058         return (error);
5059 }
5060
5061 static int
5062 saretension(struct cam_periph *periph)
5063 {
5064         union ccb *ccb;
5065         struct sa_softc *softc;
5066         int error;
5067
5068         softc = (struct sa_softc *)periph->softc;
5069
5070         ccb = cam_periph_getccb(periph, 1);
5071
5072         /* It is safe to retry this operation */
5073         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
5074             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
5075
5076         softc->dsreg = MTIO_DSREG_TEN;
5077         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
5078         softc->dsreg = MTIO_DSREG_REST;
5079
5080         xpt_release_ccb(ccb);
5081         if (error == 0) {
5082                 softc->partition = softc->fileno = softc->blkno = (daddr_t) 0;
5083                 sagetpos(periph);
5084         } else
5085                 softc->partition = softc->fileno = softc->blkno = (daddr_t) -1;
5086         return (error);
5087 }
5088
5089 static int
5090 sareservereleaseunit(struct cam_periph *periph, int reserve)
5091 {
5092         union ccb *ccb;
5093         struct sa_softc *softc;
5094         int error;
5095
5096         softc = (struct sa_softc *)periph->softc;
5097         ccb = cam_periph_getccb(periph,  1);
5098
5099         /* It is safe to retry this operation */
5100         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
5101             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
5102         softc->dsreg = MTIO_DSREG_RBSY;
5103         error = cam_periph_runccb(ccb, saerror, 0,
5104             SF_RETRY_UA | SF_NO_PRINT, softc->device_stats);
5105         softc->dsreg = MTIO_DSREG_REST;
5106         xpt_release_ccb(ccb);
5107
5108         /*
5109          * If the error was Illegal Request, then the device doesn't support
5110          * RESERVE/RELEASE. This is not an error.
5111          */
5112         if (error == EINVAL) {
5113                 error = 0;
5114         }
5115
5116         return (error);
5117 }
5118
5119 static int
5120 saloadunload(struct cam_periph *periph, int load)
5121 {
5122         union   ccb *ccb;
5123         struct  sa_softc *softc;
5124         int     error;
5125
5126         softc = (struct sa_softc *)periph->softc;
5127
5128         ccb = cam_periph_getccb(periph, 1);
5129
5130         /* It is safe to retry this operation */
5131         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
5132             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
5133
5134         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
5135         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
5136         softc->dsreg = MTIO_DSREG_REST;
5137         xpt_release_ccb(ccb);
5138
5139         if (error || load == 0) {
5140                 softc->partition = softc->fileno = softc->blkno = (daddr_t) -1;
5141                 softc->rep_fileno = softc->rep_blkno = (daddr_t) -1;
5142         } else if (error == 0) {
5143                 softc->partition = softc->fileno = softc->blkno = (daddr_t) 0;
5144                 sagetpos(periph);
5145         }
5146         return (error);
5147 }
5148
5149 static int
5150 saerase(struct cam_periph *periph, int longerase)
5151 {
5152
5153         union   ccb *ccb;
5154         struct  sa_softc *softc;
5155         int error;
5156
5157         softc = (struct sa_softc *)periph->softc;
5158         if (softc->open_rdonly)
5159                 return (EBADF);
5160
5161         ccb = cam_periph_getccb(periph, 1);
5162
5163         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
5164             SSD_FULL_SIZE, ERASE_TIMEOUT);
5165
5166         softc->dsreg = MTIO_DSREG_ZER;
5167         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
5168         softc->dsreg = MTIO_DSREG_REST;
5169
5170         xpt_release_ccb(ccb);
5171         return (error);
5172 }
5173
5174 /*
5175  * Fill an sbuf with density data in XML format.  This particular macro
5176  * works for multi-byte integer fields.
5177  *
5178  * Note that 1 byte fields aren't supported here.  The reason is that the
5179  * compiler does not evaluate the sizeof(), and assumes that any of the
5180  * sizes are possible for a given field.  So passing in a multi-byte
5181  * field will result in a warning that the assignment makes an integer
5182  * from a pointer without a cast, if there is an assignment in the 1 byte
5183  * case.
5184  */
5185 #define SAFILLDENSSB(dens_data, sb, indent, field, desc_remain,         \
5186                      len_to_go, cur_offset, desc){                      \
5187         size_t cur_field_len;                                           \
5188                                                                         \
5189         cur_field_len = sizeof(dens_data->field);                       \
5190         if (desc_remain < cur_field_len) {                              \
5191                 len_to_go -= desc_remain;                               \
5192                 cur_offset += desc_remain;                              \
5193                 continue;                                               \
5194         }                                                               \
5195         len_to_go -= cur_field_len;                                     \
5196         cur_offset += cur_field_len;                                    \
5197         desc_remain -= cur_field_len;                                   \
5198                                                                         \
5199         switch (sizeof(dens_data->field)) {                             \
5200         case 1:                                                         \
5201                 KASSERT(1 == 0, ("Programmer error, invalid 1 byte "    \
5202                         "field width for SAFILLDENSFIELD"));            \
5203                 break;                                                  \
5204         case 2:                                                         \
5205                 SASBADDUINTDESC(sb, indent,                             \
5206                     scsi_2btoul(dens_data->field), %u, field, desc);    \
5207                 break;                                                  \
5208         case 3:                                                         \
5209                 SASBADDUINTDESC(sb, indent,                             \
5210                     scsi_3btoul(dens_data->field), %u, field, desc);    \
5211                 break;                                                  \
5212         case 4:                                                         \
5213                 SASBADDUINTDESC(sb, indent,                             \
5214                     scsi_4btoul(dens_data->field), %u, field, desc);    \
5215                 break;                                                  \
5216         case 8:                                                         \
5217                 SASBADDUINTDESC(sb, indent,                             \
5218                     (uintmax_t)scsi_8btou64(dens_data->field),  %ju,    \
5219                     field, desc);                                       \
5220                 break;                                                  \
5221         default:                                                        \
5222                 break;                                                  \
5223         }                                                               \
5224 };
5225 /*
5226  * Fill an sbuf with density data in XML format.  This particular macro
5227  * works for strings.
5228  */
5229 #define SAFILLDENSSBSTR(dens_data, sb, indent, field, desc_remain,      \
5230                         len_to_go, cur_offset, desc){                   \
5231         size_t cur_field_len;                                           \
5232         char tmpstr[32];                                                \
5233                                                                         \
5234         cur_field_len = sizeof(dens_data->field);                       \
5235         if (desc_remain < cur_field_len) {                              \
5236                 len_to_go -= desc_remain;                               \
5237                 cur_offset += desc_remain;                              \
5238                 continue;                                               \
5239         }                                                               \
5240         len_to_go -= cur_field_len;                                     \
5241         cur_offset += cur_field_len;                                    \
5242         desc_remain -= cur_field_len;                                   \
5243                                                                         \
5244         cam_strvis(tmpstr, dens_data->field,                            \
5245             sizeof(dens_data->field), sizeof(tmpstr));                  \
5246         SASBADDVARSTRDESC(sb, indent, tmpstr, %s, field,                \
5247             strlen(tmpstr) + 1, desc);                                  \
5248 };
5249
5250 /*
5251  * Fill an sbuf with density data descriptors.
5252  */
5253 static void
5254 safilldenstypesb(struct sbuf *sb, int *indent, uint8_t *buf, int buf_len,
5255     int is_density)
5256 {
5257         struct scsi_density_hdr *hdr;
5258         uint32_t hdr_len;
5259         int len_to_go, cur_offset;
5260         int length_offset;
5261         int num_reports, need_close;
5262
5263         /*
5264          * We need at least the header length.  Note that this isn't an
5265          * error, not all tape drives will have every data type.
5266          */
5267         if (buf_len < sizeof(*hdr))
5268                 goto bailout;
5269
5270
5271         hdr = (struct scsi_density_hdr *)buf;
5272         hdr_len = scsi_2btoul(hdr->length);
5273         len_to_go = min(buf_len - sizeof(*hdr), hdr_len);
5274         if (is_density) {
5275                 length_offset = __offsetof(struct scsi_density_data,
5276                     bits_per_mm);
5277         } else {
5278                 length_offset = __offsetof(struct scsi_medium_type_data,
5279                     num_density_codes);
5280         }
5281         cur_offset = sizeof(*hdr);
5282
5283         num_reports = 0;
5284         need_close = 0;
5285
5286         while (len_to_go > length_offset) {
5287                 struct scsi_density_data *dens_data;
5288                 struct scsi_medium_type_data *type_data;
5289                 int desc_remain;
5290                 size_t cur_field_len;
5291
5292                 dens_data = NULL;
5293                 type_data = NULL;
5294
5295                 if (is_density) {
5296                         dens_data =(struct scsi_density_data *)&buf[cur_offset];
5297                         if (dens_data->byte2 & SDD_DLV)
5298                                 desc_remain = scsi_2btoul(dens_data->length);
5299                         else
5300                                 desc_remain = SDD_DEFAULT_LENGTH -
5301                                     length_offset;
5302                 } else {
5303                         type_data = (struct scsi_medium_type_data *)
5304                             &buf[cur_offset];
5305                         desc_remain = scsi_2btoul(type_data->length);
5306                 }
5307
5308                 len_to_go -= length_offset;
5309                 desc_remain = min(desc_remain, len_to_go);
5310                 cur_offset += length_offset;
5311
5312                 if (need_close != 0) {
5313                         SASBENDNODE(sb, *indent, density_entry);
5314                 }
5315
5316                 SASBADDNODENUM(sb, *indent, density_entry, num_reports);
5317                 num_reports++;
5318                 need_close = 1;
5319
5320                 if (is_density) {
5321                         SASBADDUINTDESC(sb, *indent,
5322                             dens_data->primary_density_code, %u,
5323                             primary_density_code, "Primary Density Code");
5324                         SASBADDUINTDESC(sb, *indent,
5325                             dens_data->secondary_density_code, %u,
5326                             secondary_density_code, "Secondary Density Code");
5327                         SASBADDUINTDESC(sb, *indent,
5328                             dens_data->byte2 & ~SDD_DLV, %#x, density_flags,
5329                             "Density Flags");
5330
5331                         SAFILLDENSSB(dens_data, sb, *indent, bits_per_mm,
5332                             desc_remain, len_to_go, cur_offset, "Bits per mm");
5333                         SAFILLDENSSB(dens_data, sb, *indent, media_width,
5334                             desc_remain, len_to_go, cur_offset, "Media width");
5335                         SAFILLDENSSB(dens_data, sb, *indent, tracks,
5336                             desc_remain, len_to_go, cur_offset,
5337                             "Number of Tracks");
5338                         SAFILLDENSSB(dens_data, sb, *indent, capacity,
5339                             desc_remain, len_to_go, cur_offset, "Capacity");
5340
5341                         SAFILLDENSSBSTR(dens_data, sb, *indent, assigning_org,
5342                             desc_remain, len_to_go, cur_offset,
5343                             "Assigning Organization");
5344
5345                         SAFILLDENSSBSTR(dens_data, sb, *indent, density_name,
5346                             desc_remain, len_to_go, cur_offset, "Density Name");
5347
5348                         SAFILLDENSSBSTR(dens_data, sb, *indent, description,
5349                             desc_remain, len_to_go, cur_offset, "Description");
5350                 } else {
5351                         int i;
5352
5353                         SASBADDUINTDESC(sb, *indent, type_data->medium_type,
5354                             %u, medium_type, "Medium Type");
5355
5356                         cur_field_len =
5357                             __offsetof(struct scsi_medium_type_data,
5358                                        media_width) -
5359                             __offsetof(struct scsi_medium_type_data,
5360                                        num_density_codes);
5361
5362                         if (desc_remain < cur_field_len) {
5363                                 len_to_go -= desc_remain;
5364                                 cur_offset += desc_remain;
5365                                 continue;
5366                         }
5367                         len_to_go -= cur_field_len;
5368                         cur_offset += cur_field_len;
5369                         desc_remain -= cur_field_len;
5370
5371                         SASBADDINTDESC(sb, *indent,
5372                             type_data->num_density_codes, %d,
5373                             num_density_codes, "Number of Density Codes");
5374                         SASBADDNODE(sb, *indent, density_code_list);
5375                         for (i = 0; i < type_data->num_density_codes;
5376                              i++) {
5377                                 SASBADDUINTDESC(sb, *indent,
5378                                     type_data->primary_density_codes[i], %u,
5379                                     density_code, "Density Code");
5380                         }
5381                         SASBENDNODE(sb, *indent, density_code_list);
5382
5383                         SAFILLDENSSB(type_data, sb, *indent, media_width,
5384                             desc_remain, len_to_go, cur_offset,
5385                             "Media width");
5386                         SAFILLDENSSB(type_data, sb, *indent, medium_length,
5387                             desc_remain, len_to_go, cur_offset,
5388                             "Medium length");
5389
5390                         /*
5391                          * Account for the two reserved bytes.
5392                          */
5393                         cur_field_len = sizeof(type_data->reserved2);
5394                         if (desc_remain < cur_field_len) {
5395                                 len_to_go -= desc_remain;
5396                                 cur_offset += desc_remain;
5397                                 continue;
5398                         }
5399                         len_to_go -= cur_field_len;
5400                         cur_offset += cur_field_len;
5401                         desc_remain -= cur_field_len;
5402
5403                         SAFILLDENSSBSTR(type_data, sb, *indent, assigning_org,
5404                             desc_remain, len_to_go, cur_offset,
5405                             "Assigning Organization");
5406                         SAFILLDENSSBSTR(type_data, sb, *indent,
5407                             medium_type_name, desc_remain, len_to_go,
5408                             cur_offset, "Medium type name");
5409                         SAFILLDENSSBSTR(type_data, sb, *indent, description,
5410                             desc_remain, len_to_go, cur_offset, "Description");
5411
5412                 }
5413         }
5414         if (need_close != 0) {
5415                 SASBENDNODE(sb, *indent, density_entry);
5416         }
5417
5418 bailout:
5419         return;
5420 }
5421
5422 /*
5423  * Fill an sbuf with density data information
5424  */
5425 static void
5426 safilldensitysb(struct sa_softc *softc, int *indent, struct sbuf *sb)
5427 {
5428         int i, is_density;
5429
5430         SASBADDNODE(sb, *indent, mtdensity);
5431         SASBADDUINTDESC(sb, *indent, softc->media_density, %u, media_density,
5432             "Current Medium Density");
5433         is_density = 0;
5434         for (i = 0; i < SA_DENSITY_TYPES; i++) {
5435                 int tmpint;
5436
5437                 if (softc->density_info_valid[i] == 0)
5438                         continue;
5439
5440                 SASBADDNODE(sb, *indent, density_report);
5441                 if (softc->density_type_bits[i] & SRDS_MEDIUM_TYPE) {
5442                         tmpint = 1;
5443                         is_density = 0;
5444                 } else {
5445                         tmpint = 0;
5446                         is_density = 1;
5447                 }
5448                 SASBADDINTDESC(sb, *indent, tmpint, %d, medium_type_report,
5449                     "Medium type report");
5450
5451                 if (softc->density_type_bits[i] & SRDS_MEDIA)
5452                         tmpint = 1;
5453                 else
5454                         tmpint = 0;
5455                 SASBADDINTDESC(sb, *indent, tmpint, %d, media_report,
5456                     "Media report");
5457
5458                 safilldenstypesb(sb, indent, softc->density_info[i],
5459                     softc->density_info_valid[i], is_density);
5460                 SASBENDNODE(sb, *indent, density_report);
5461         }
5462         SASBENDNODE(sb, *indent, mtdensity);
5463 }
5464
5465 #endif /* _KERNEL */
5466
5467 /*
5468  * Read tape block limits command.
5469  */
5470 void
5471 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
5472                    void (*cbfcnp)(struct cam_periph *, union ccb *),
5473                    u_int8_t tag_action,
5474                    struct scsi_read_block_limits_data *rlimit_buf,
5475                    u_int8_t sense_len, u_int32_t timeout)
5476 {
5477         struct scsi_read_block_limits *scsi_cmd;
5478
5479         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
5480              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
5481              sizeof(*scsi_cmd), timeout);
5482
5483         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
5484         bzero(scsi_cmd, sizeof(*scsi_cmd));
5485         scsi_cmd->opcode = READ_BLOCK_LIMITS;
5486 }
5487
5488 void
5489 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
5490                    void (*cbfcnp)(struct cam_periph *, union ccb *),
5491                    u_int8_t tag_action, int readop, int sli,
5492                    int fixed, u_int32_t length, u_int8_t *data_ptr,
5493                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
5494 {
5495         struct scsi_sa_rw *scsi_cmd;
5496         int read;
5497
5498         read = (readop & SCSI_RW_DIRMASK) == SCSI_RW_READ;
5499
5500         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
5501         scsi_cmd->opcode = read ? SA_READ : SA_WRITE;
5502         scsi_cmd->sli_fixed = 0;
5503         if (sli && read)
5504                 scsi_cmd->sli_fixed |= SAR_SLI;
5505         if (fixed)
5506                 scsi_cmd->sli_fixed |= SARW_FIXED;
5507         scsi_ulto3b(length, scsi_cmd->length);
5508         scsi_cmd->control = 0;
5509
5510         cam_fill_csio(csio, retries, cbfcnp, (read ? CAM_DIR_IN : CAM_DIR_OUT) |
5511             ((readop & SCSI_RW_BIO) != 0 ? CAM_DATA_BIO : 0),
5512             tag_action, data_ptr, dxfer_len, sense_len,
5513             sizeof(*scsi_cmd), timeout);
5514 }
5515
5516 void
5517 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
5518                  void (*cbfcnp)(struct cam_periph *, union ccb *),
5519                  u_int8_t tag_action, int immediate, int eot,
5520                  int reten, int load, u_int8_t sense_len,
5521                  u_int32_t timeout)
5522 {
5523         struct scsi_load_unload *scsi_cmd;
5524
5525         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
5526         bzero(scsi_cmd, sizeof(*scsi_cmd));
5527         scsi_cmd->opcode = LOAD_UNLOAD;
5528         if (immediate)
5529                 scsi_cmd->immediate = SLU_IMMED;
5530         if (eot)
5531                 scsi_cmd->eot_reten_load |= SLU_EOT;
5532         if (reten)
5533                 scsi_cmd->eot_reten_load |= SLU_RETEN;
5534         if (load)
5535                 scsi_cmd->eot_reten_load |= SLU_LOAD;
5536
5537         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
5538             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
5539 }
5540
5541 void
5542 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
5543             void (*cbfcnp)(struct cam_periph *, union ccb *),
5544             u_int8_t tag_action, int immediate, u_int8_t sense_len,
5545             u_int32_t timeout)
5546 {
5547         struct scsi_rewind *scsi_cmd;
5548
5549         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
5550         bzero(scsi_cmd, sizeof(*scsi_cmd));
5551         scsi_cmd->opcode = REWIND;
5552         if (immediate)
5553                 scsi_cmd->immediate = SREW_IMMED;
5554
5555         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
5556             0, sense_len, sizeof(*scsi_cmd), timeout);
5557 }
5558
5559 void
5560 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
5561            void (*cbfcnp)(struct cam_periph *, union ccb *),
5562            u_int8_t tag_action, scsi_space_code code,
5563            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
5564 {
5565         struct scsi_space *scsi_cmd;
5566
5567         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
5568         scsi_cmd->opcode = SPACE;
5569         scsi_cmd->code = code;
5570         scsi_ulto3b(count, scsi_cmd->count);
5571         scsi_cmd->control = 0;
5572
5573         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
5574             0, sense_len, sizeof(*scsi_cmd), timeout);
5575 }
5576
5577 void
5578 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
5579                      void (*cbfcnp)(struct cam_periph *, union ccb *),
5580                      u_int8_t tag_action, int immediate, int setmark,
5581                      u_int32_t num_marks, u_int8_t sense_len,
5582                      u_int32_t timeout)
5583 {
5584         struct scsi_write_filemarks *scsi_cmd;
5585
5586         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
5587         bzero(scsi_cmd, sizeof(*scsi_cmd));
5588         scsi_cmd->opcode = WRITE_FILEMARKS;
5589         if (immediate)
5590                 scsi_cmd->byte2 |= SWFMRK_IMMED;
5591         if (setmark)
5592                 scsi_cmd->byte2 |= SWFMRK_WSMK;
5593
5594         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
5595
5596         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
5597             0, sense_len, sizeof(*scsi_cmd), timeout);
5598 }
5599
5600 /*
5601  * The reserve and release unit commands differ only by their opcodes.
5602  */
5603 void
5604 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
5605                           void (*cbfcnp)(struct cam_periph *, union ccb *),
5606                           u_int8_t tag_action, int third_party,
5607                           int third_party_id, u_int8_t sense_len,
5608                           u_int32_t timeout, int reserve)
5609 {
5610         struct scsi_reserve_release_unit *scsi_cmd;
5611
5612         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
5613         bzero(scsi_cmd, sizeof(*scsi_cmd));
5614
5615         if (reserve)
5616                 scsi_cmd->opcode = RESERVE_UNIT;
5617         else
5618                 scsi_cmd->opcode = RELEASE_UNIT;
5619
5620         if (third_party) {
5621                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
5622                 scsi_cmd->lun_thirdparty |=
5623                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
5624         }
5625
5626         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
5627             0, sense_len, sizeof(*scsi_cmd), timeout);
5628 }
5629
5630 void
5631 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
5632            void (*cbfcnp)(struct cam_periph *, union ccb *),
5633            u_int8_t tag_action, int immediate, int long_erase,
5634            u_int8_t sense_len, u_int32_t timeout)
5635 {
5636         struct scsi_erase *scsi_cmd;
5637
5638         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
5639         bzero(scsi_cmd, sizeof(*scsi_cmd));
5640
5641         scsi_cmd->opcode = ERASE;
5642
5643         if (immediate)
5644                 scsi_cmd->lun_imm_long |= SE_IMMED;
5645
5646         if (long_erase)
5647                 scsi_cmd->lun_imm_long |= SE_LONG;
5648
5649         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
5650             0, sense_len, sizeof(*scsi_cmd), timeout);
5651 }
5652
5653 /*
5654  * Read Tape Position command.
5655  */
5656 void
5657 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
5658                    void (*cbfcnp)(struct cam_periph *, union ccb *),
5659                    u_int8_t tag_action, int hardsoft,
5660                    struct scsi_tape_position_data *sbp,
5661                    u_int8_t sense_len, u_int32_t timeout)
5662 {
5663         struct scsi_tape_read_position *scmd;
5664
5665         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
5666             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
5667         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
5668         bzero(scmd, sizeof(*scmd));
5669         scmd->opcode = READ_POSITION;
5670         scmd->byte1 = hardsoft;
5671 }
5672
5673 /*
5674  * Read Tape Position command.
5675  */
5676 void
5677 scsi_read_position_10(struct ccb_scsiio *csio, u_int32_t retries,
5678                       void (*cbfcnp)(struct cam_periph *, union ccb *),
5679                       u_int8_t tag_action, int service_action,
5680                       u_int8_t *data_ptr, u_int32_t length,
5681                       u_int32_t sense_len, u_int32_t timeout)
5682 {
5683         struct scsi_tape_read_position *scmd;
5684
5685         cam_fill_csio(csio,
5686                       retries,
5687                       cbfcnp,
5688                       /*flags*/CAM_DIR_IN,
5689                       tag_action,
5690                       /*data_ptr*/data_ptr,
5691                       /*dxfer_len*/length,
5692                       sense_len,
5693                       sizeof(*scmd),
5694                       timeout);
5695
5696
5697         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
5698         bzero(scmd, sizeof(*scmd));
5699         scmd->opcode = READ_POSITION;
5700         scmd->byte1 = service_action;
5701         /*
5702          * The length is only currently set (as of SSC4r03) if the extended
5703          * form is specified.  The other forms have fixed lengths.
5704          */
5705         if (service_action == SA_RPOS_EXTENDED_FORM)
5706                 scsi_ulto2b(length, scmd->length);
5707 }
5708
5709 /*
5710  * Set Tape Position command.
5711  */
5712 void
5713 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
5714                    void (*cbfcnp)(struct cam_periph *, union ccb *),
5715                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
5716                    u_int8_t sense_len, u_int32_t timeout)
5717 {
5718         struct scsi_tape_locate *scmd;
5719
5720         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
5721             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
5722         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
5723         bzero(scmd, sizeof(*scmd));
5724         scmd->opcode = LOCATE;
5725         if (hardsoft)
5726                 scmd->byte1 |= SA_SPOS_BT;
5727         scsi_ulto4b(blkno, scmd->blkaddr);
5728 }
5729
5730 /*
5731  * XXX KDM figure out how to make a compatibility function.
5732  */
5733 void
5734 scsi_locate_10(struct ccb_scsiio *csio, u_int32_t retries,
5735                void (*cbfcnp)(struct cam_periph *, union ccb *),
5736                u_int8_t tag_action, int immed, int cp, int hard,
5737                int64_t partition, u_int32_t block_address,
5738                int sense_len, u_int32_t timeout)
5739 {
5740         struct scsi_tape_locate *scmd;
5741
5742         cam_fill_csio(csio,
5743                       retries,
5744                       cbfcnp,
5745                       CAM_DIR_NONE,
5746                       tag_action,
5747                       /*data_ptr*/ NULL,
5748                       /*dxfer_len*/ 0,
5749                       sense_len,
5750                       sizeof(*scmd),
5751                       timeout);
5752         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
5753         bzero(scmd, sizeof(*scmd));
5754         scmd->opcode = LOCATE;
5755         if (immed)
5756                 scmd->byte1 |= SA_SPOS_IMMED;
5757         if (cp)
5758                 scmd->byte1 |= SA_SPOS_CP;
5759         if (hard)
5760                 scmd->byte1 |= SA_SPOS_BT;
5761         scsi_ulto4b(block_address, scmd->blkaddr);
5762         scmd->partition = partition;
5763 }
5764
5765 void
5766 scsi_locate_16(struct ccb_scsiio *csio, u_int32_t retries,
5767                void (*cbfcnp)(struct cam_periph *, union ccb *),
5768                u_int8_t tag_action, int immed, int cp, u_int8_t dest_type,
5769                int bam, int64_t partition, u_int64_t logical_id,
5770                int sense_len, u_int32_t timeout)
5771 {
5772
5773         struct scsi_locate_16 *scsi_cmd;
5774
5775         cam_fill_csio(csio,
5776                       retries,
5777                       cbfcnp,
5778                       /*flags*/CAM_DIR_NONE,
5779                       tag_action,
5780                       /*data_ptr*/NULL,
5781                       /*dxfer_len*/0,
5782                       sense_len,
5783                       sizeof(*scsi_cmd),
5784                       timeout);
5785
5786         scsi_cmd = (struct scsi_locate_16 *)&csio->cdb_io.cdb_bytes;
5787         bzero(scsi_cmd, sizeof(*scsi_cmd));
5788         scsi_cmd->opcode = LOCATE_16;
5789         if (immed)
5790                 scsi_cmd->byte1 |= SA_LC_IMMEDIATE;
5791         if (cp)
5792                 scsi_cmd->byte1 |= SA_LC_CP;
5793         scsi_cmd->byte1 |= (dest_type << SA_LC_DEST_TYPE_SHIFT);
5794
5795         scsi_cmd->byte2 |= bam;
5796         scsi_cmd->partition = partition;
5797         scsi_u64to8b(logical_id, scsi_cmd->logical_id);
5798 }
5799
5800 void
5801 scsi_report_density_support(struct ccb_scsiio *csio, u_int32_t retries,
5802                             void (*cbfcnp)(struct cam_periph *, union ccb *),
5803                             u_int8_t tag_action, int media, int medium_type,
5804                             u_int8_t *data_ptr, u_int32_t length,
5805                             u_int32_t sense_len, u_int32_t timeout)
5806 {
5807         struct scsi_report_density_support *scsi_cmd;
5808
5809         scsi_cmd =(struct scsi_report_density_support *)&csio->cdb_io.cdb_bytes;
5810         bzero(scsi_cmd, sizeof(*scsi_cmd));
5811
5812         scsi_cmd->opcode = REPORT_DENSITY_SUPPORT;
5813         if (media != 0)
5814                 scsi_cmd->byte1 |= SRDS_MEDIA;
5815         if (medium_type != 0)
5816                 scsi_cmd->byte1 |= SRDS_MEDIUM_TYPE;
5817
5818         scsi_ulto2b(length, scsi_cmd->length);
5819
5820         cam_fill_csio(csio,
5821                       retries,
5822                       cbfcnp,
5823                       /*flags*/CAM_DIR_IN,
5824                       tag_action,
5825                       /*data_ptr*/data_ptr,
5826                       /*dxfer_len*/length,
5827                       sense_len,
5828                       sizeof(*scsi_cmd),
5829                       timeout);
5830 }
5831
5832 void
5833 scsi_set_capacity(struct ccb_scsiio *csio, u_int32_t retries,
5834                   void (*cbfcnp)(struct cam_periph *, union ccb *),
5835                   u_int8_t tag_action, int byte1, u_int32_t proportion,
5836                   u_int32_t sense_len, u_int32_t timeout)
5837 {
5838         struct scsi_set_capacity *scsi_cmd;
5839
5840         scsi_cmd = (struct scsi_set_capacity *)&csio->cdb_io.cdb_bytes;
5841         bzero(scsi_cmd, sizeof(*scsi_cmd));
5842
5843         scsi_cmd->opcode = SET_CAPACITY;
5844
5845         scsi_cmd->byte1 = byte1;
5846         scsi_ulto2b(proportion, scsi_cmd->cap_proportion);
5847
5848         cam_fill_csio(csio,
5849                       retries,
5850                       cbfcnp,
5851                       /*flags*/CAM_DIR_NONE,
5852                       tag_action,
5853                       /*data_ptr*/NULL,
5854                       /*dxfer_len*/0,
5855                       sense_len,
5856                       sizeof(*scsi_cmd),
5857                       timeout);
5858 }
5859
5860 void
5861 scsi_format_medium(struct ccb_scsiio *csio, u_int32_t retries,
5862                    void (*cbfcnp)(struct cam_periph *, union ccb *),
5863                    u_int8_t tag_action, int byte1, int byte2,
5864                    u_int8_t *data_ptr, u_int32_t dxfer_len,
5865                    u_int32_t sense_len, u_int32_t timeout)
5866 {
5867         struct scsi_format_medium *scsi_cmd;
5868
5869         scsi_cmd = (struct scsi_format_medium*)&csio->cdb_io.cdb_bytes;
5870         bzero(scsi_cmd, sizeof(*scsi_cmd));
5871
5872         scsi_cmd->opcode = FORMAT_MEDIUM;
5873
5874         scsi_cmd->byte1 = byte1;
5875         scsi_cmd->byte2 = byte2;
5876
5877         scsi_ulto2b(dxfer_len, scsi_cmd->length);
5878
5879         cam_fill_csio(csio,
5880                       retries,
5881                       cbfcnp,
5882                       /*flags*/(dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
5883                       tag_action,
5884                       /*data_ptr*/ data_ptr,
5885                       /*dxfer_len*/ dxfer_len,
5886                       sense_len,
5887                       sizeof(*scsi_cmd),
5888                       timeout);
5889 }
5890
5891 void
5892 scsi_allow_overwrite(struct ccb_scsiio *csio, u_int32_t retries,
5893                    void (*cbfcnp)(struct cam_periph *, union ccb *),
5894                    u_int8_t tag_action, int allow_overwrite, int partition,
5895                    u_int64_t logical_id, u_int32_t sense_len, u_int32_t timeout)
5896 {
5897         struct scsi_allow_overwrite *scsi_cmd;
5898
5899         scsi_cmd = (struct scsi_allow_overwrite *)&csio->cdb_io.cdb_bytes;
5900         bzero(scsi_cmd, sizeof(*scsi_cmd));
5901
5902         scsi_cmd->opcode = ALLOW_OVERWRITE;
5903
5904         scsi_cmd->allow_overwrite = allow_overwrite;
5905         scsi_cmd->partition = partition;
5906         scsi_u64to8b(logical_id, scsi_cmd->logical_id);
5907
5908         cam_fill_csio(csio,
5909                       retries,
5910                       cbfcnp,
5911                       CAM_DIR_NONE,
5912                       tag_action,
5913                       /*data_ptr*/ NULL,
5914                       /*dxfer_len*/ 0,
5915                       sense_len,
5916                       sizeof(*scsi_cmd),
5917                       timeout);
5918 }