/* $NetBSD: st.c,v 1.128 2000/11/02 13:12:58 pk Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Originally written by Julian Elischer (julian@tfs.com) * for TRW Financial Systems for use under the MACH(2.5) operating system. * * TRW Financial Systems, in accordance with their agreement with Carnegie * Mellon University, makes this software available to CMU to distribute * or use in any manner that they see fit as long as this message is kept with * the software. For this reason TFS also grants any other persons or * organisations permission to use or modify this software. * * TFS supplies this software to be publicly redistributed * on the understanding that TFS is not responsible for the correct * functioning of this software in any circumstances. * * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 * * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). */ #include "opt_scsi.h" #include "rnd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NRND > 0 #include #endif #include #include #include #include /* Defines for device specific stuff */ #define DEF_FIXED_BSIZE 512 #define ST_RETRIES 4 /* only on non IO commands */ #define STMODE(z) ( minor(z) & 0x03) #define STDSTY(z) ((minor(z) >> 2) & 0x03) #define STUNIT(z) ((minor(z) >> 4) ) #define NORMAL_MODE 0 #define NOREW_MODE 1 #define EJECT_MODE 2 #define CTRL_MODE 3 #define FALSE 0 #define TRUE 1 #define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */ #define ST_CTL_TIME (30 * 1000) /* 30 seconds */ #define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */ #ifndef ST_MOUNT_DELAY #define ST_MOUNT_DELAY 0 #endif /* * Define various devices that we know mis-behave in some way, * and note how they are bad, so we can correct for them */ struct modes { u_int quirks; /* same definitions as in quirkdata */ int blksize; u_int8_t density; }; struct quirkdata { u_int quirks; #define ST_Q_FORCE_BLKSIZE 0x0001 #define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */ #define ST_Q_IGNORE_LOADS 0x0004 #define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */ #define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */ #define ST_Q_NOPREVENT 0x0020 /* does not support PREVENT */ u_int page_0_size; #define MAX_PAGE_0_SIZE 64 struct modes modes[4]; }; struct st_quirk_inquiry_pattern { struct scsipi_inquiry_pattern pattern; struct quirkdata quirkdata; }; struct st_quirk_inquiry_pattern st_quirk_patterns[] = { {{T_SEQUENTIAL, T_REMOV, " ", " ", " "}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "TANDBERG", " TDC 3600 ", ""}, {0, 12, { {0, 0, 0}, /* minor 0-3 */ {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "TANDBERG", " TDC 3800 ", ""}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {0, 0, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, /* * lacking a manual for the 4200, it's not clear what the * specific density codes should be- the device is a 2.5GB * capable QIC drive, those density codes aren't readily * availabel. The 'default' will just have to do. */ {{T_SEQUENTIAL, T_REMOV, "TANDBERG", " TDC 4200 ", ""}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {0, 0, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, /* * At least -005 and -007 need this. I'll assume they all do unless I * hear otherwise. - mycroft, 31MAR1994 */ {{T_SEQUENTIAL, T_REMOV, "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, /* * One user reports that this works for his tape drive. It probably * needs more work. - mycroft, 09APR1994 */ {{T_SEQUENTIAL, T_REMOV, "SANKYO ", "CP525 ", ""}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "ANRITSU ", "DMT780 ", ""}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ {0, 0, QIC_150}, /* minor 4-7 */ {0, 0, QIC_120}, /* minor 8-11 */ {0, 0, QIC_24} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "ARCHIVE ", "VIPER 150 21531", ""}, {0, 12, { {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ {0, 0, QIC_150}, /* minor 4-7 */ {0, 0, QIC_120}, /* minor 8-11 */ {0, 0, QIC_24} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {0, 0, QIC_11}, /* minor 4-7 */ {0, 0, QIC_24}, /* minor 8-11 */ {0, 0, QIC_24} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {0, 0, QIC_24}, /* minor 4-7 */ {0, 0, QIC_120}, /* minor 8-11 */ {0, 0, QIC_150} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { {0, 0, 0}, /* minor 0-3 */ {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ {0, 0, QIC_150}, /* minor 8-11 */ {0, 0, QIC_120} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "WangDAT ", "Model 1300 ", ""}, {0, 0, { {0, 0, 0}, /* minor 0-3 */ {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "STK", "9490", ""}, {ST_Q_FORCE_BLKSIZE, 0, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "STK", "SD-3", ""}, {ST_Q_FORCE_BLKSIZE, 0, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { {0, 0, QIC_3095}, /* minor 0-3 */ {0, 0, QIC_3095}, /* minor 4-7 */ {0, 0, QIC_3095}, /* minor 8-11 */ {0, 0, QIC_3095}, /* minor 12-15 */ }}}, #if 0 {{T_SEQUENTIAL, T_REMOV, "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, #endif {{T_SEQUENTIAL, T_REMOV, "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ }}}, {{T_SEQUENTIAL, T_REMOV, "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { {0, 0, 0}, /* minor 0-3 */ {0, 0, 0}, /* minor 4-7 */ {0, 0, 0}, /* minor 8-11 */ {0, 0, 0} /* minor 12-15 */ }}}, }; #define NOEJECT 0 #define EJECT 1 struct st_softc { struct device sc_dev; /*--------------------present operating parameters, flags etc.---------------*/ int flags; /* see below */ u_int quirks; /* quirks for the open mode */ int blksize; /* blksize we are using */ u_int8_t density; /* present density */ u_int page_0_size; /* size of page 0 data */ u_int last_dsty; /* last density opened */ short mt_resid; /* last (short) resid */ short mt_erreg; /* last error (sense key) seen */ #define mt_key mt_erreg u_int8_t asc; /* last asc code seen */ u_int8_t ascq; /* last asc code seen */ /*--------------------device/scsi parameters---------------------------------*/ struct scsipi_link *sc_link; /* our link to the adapter etc. */ /*--------------------parameters reported by the device ---------------------*/ int blkmin; /* min blk size */ int blkmax; /* max blk size */ struct quirkdata *quirkdata; /* if we have a rogue entry */ /*--------------------parameters reported by the device for this media-------*/ u_long numblks; /* nominal blocks capacity */ int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ u_int8_t media_density; /* this is what it said when asked */ /*--------------------quirks for the whole drive-----------------------------*/ u_int drive_quirks; /* quirks of this drive */ /*--------------------How we should set up when opening each minor device----*/ struct modes modes[4]; /* plus more for each mode */ u_int8_t modeflags[4]; /* flags for the modes */ #define DENSITY_SET_BY_USER 0x01 #define DENSITY_SET_BY_QUIRK 0x02 #define BLKSIZE_SET_BY_USER 0x04 #define BLKSIZE_SET_BY_QUIRK 0x08 /*--------------------storage for sense data returned by the drive-----------*/ u_char sense_data[MAX_PAGE_0_SIZE]; /* * additional sense data needed * for mode sense/select. */ struct buf_queue buf_queue; /* the queue of pending IO */ /* operations */ #if NRND > 0 rndsource_element_t rnd_source; #endif }; int stmatch __P((struct device *, struct cfdata *, void *)); void stattach __P((struct device *, struct device *, void *)); void st_identify_drive __P((struct st_softc *, struct scsipi_inquiry_pattern *)); void st_loadquirks __P((struct st_softc *)); int st_mount_tape __P((dev_t, int)); void st_unmount __P((struct st_softc *, boolean)); int st_decide_mode __P((struct st_softc *, boolean)); void ststart __P((void *)); void stdone __P((struct scsipi_xfer *)); int st_read __P((struct st_softc *, char *, int, int)); int st_read_block_limits __P((struct st_softc *, int)); int st_mode_sense __P((struct st_softc *, int)); int st_mode_select __P((struct st_softc *, int)); int st_cmprss __P((struct st_softc *, int)); int st_space __P((struct st_softc *, int, u_int, int)); int st_write_filemarks __P((struct st_softc *, int, int)); int st_check_eod __P((struct st_softc *, boolean, int *, int)); int st_load __P((struct st_softc *, u_int, int)); int st_rewind __P((struct st_softc *, u_int, int)); int st_interpret_sense __P((struct scsipi_xfer *)); int st_touch_tape __P((struct st_softc *)); int st_erase __P((struct st_softc *, int full, int flags)); int st_rdpos __P((struct st_softc *, int, u_int32_t *)); int st_setpos __P((struct st_softc *, int, u_int32_t *)); struct cfattach st_ca = { sizeof(struct st_softc), stmatch, stattach }; extern struct cfdriver st_cd; struct scsipi_device st_switch = { st_interpret_sense, ststart, NULL, stdone }; #define ST_INFO_VALID 0x0001 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */ #define ST_FIXEDBLOCKS 0x0008 #define ST_AT_FILEMARK 0x0010 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */ #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ #define ST_FM_WRITTEN 0x0100 /* * EOF file mark written -- used with * ~ST_WRITTEN to indicate that multiple file * marks have been written */ #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ #define ST_MOUNTED 0x0800 /* Device is presently mounted */ #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */ #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */ #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \ ST_BLANK_READ) #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ ST_2FM_AT_EOD | ST_PER_ACTION) #if defined(ST_ENABLE_EARLYWARN) #define ST_INIT_FLAGS ST_EARLYWARN #else #define ST_INIT_FLAGS 0 #endif struct scsipi_inquiry_pattern st_patterns[] = { {T_SEQUENTIAL, T_REMOV, "", "", ""}, }; int stmatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct scsipibus_attach_args *sa = aux; int priority; (void)scsipi_inqmatch(&sa->sa_inqbuf, (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), sizeof(st_patterns[0]), &priority); return (priority); } /* * The routine called by the low level scsi routine when it discovers * A device suitable for this driver */ void stattach(parent, self, aux) struct device *parent, *self; void *aux; { struct st_softc *st = (void *)self; struct scsipibus_attach_args *sa = aux; struct scsipi_link *sc_link = sa->sa_sc_link; SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); /* * Store information needed to contact our base driver */ st->sc_link = sc_link; sc_link->device = &st_switch; sc_link->device_softc = st; sc_link->openings = 1; /* * Set initial flags */ st->flags = ST_INIT_FLAGS; /* * Check if the drive is a known criminal and take * Any steps needed to bring it into line */ st_identify_drive(st, &sa->sa_inqbuf); /* * Use the subdriver to request information regarding * the drive. We cannot use interrupts yet, so the * request must specify this. */ printf("\n"); printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); if (scsipi_test_unit_ready(sc_link, XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || st_mode_sense(st, XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) printf("drive empty\n"); else { printf("density code %d, ", st->media_density); if (st->media_blksize > 0) printf("%d-byte", st->media_blksize); else printf("variable"); printf(" blocks, write-%s\n", (st->flags & ST_READONLY) ? "protected" : "enabled"); } /* * Set up the buf queue for this device */ BUFQ_INIT(&st->buf_queue); #if NRND > 0 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, RND_TYPE_TAPE, 0); #endif } /* * Use the inquiry routine in 'scsi_base' to get drive info so we can * Further tailor our behaviour. */ void st_identify_drive(st, inqbuf) struct st_softc *st; struct scsipi_inquiry_pattern *inqbuf; { struct st_quirk_inquiry_pattern *finger; int priority; finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, (caddr_t)st_quirk_patterns, sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), sizeof(st_quirk_patterns[0]), &priority); if (priority != 0) { st->quirkdata = &finger->quirkdata; st->drive_quirks = finger->quirkdata.quirks; st->quirks = finger->quirkdata.quirks; /* start value */ st->page_0_size = finger->quirkdata.page_0_size; st_loadquirks(st); } } /* * initialise the subdevices to the default (QUIRK) state. * this will remove any setting made by the system operator or previous * operations. */ void st_loadquirks(st) struct st_softc *st; { int i; struct modes *mode; struct modes *mode2; mode = st->quirkdata->modes; mode2 = st->modes; for (i = 0; i < 4; i++) { bzero(mode2, sizeof(struct modes)); st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | DENSITY_SET_BY_USER); if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { mode2->blksize = mode->blksize; st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; } if (mode->density) { mode2->density = mode->density; st->modeflags[i] |= DENSITY_SET_BY_QUIRK; } mode2->quirks |= mode->quirks; mode++; mode2++; } } /* * open the device. */ int stopen(dev, flags, mode, p) dev_t dev; int flags; int mode; struct proc *p; { u_int stmode, dsty; int error, sflags, unit, tries, ntries; struct st_softc *st; struct scsipi_link *sc_link; unit = STUNIT(dev); if (unit >= st_cd.cd_ndevs) return (ENXIO); st = st_cd.cd_devs[unit]; if (st == NULL) return (ENXIO); stmode = STMODE(dev); dsty = STDSTY(dev); sc_link = st->sc_link; SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, unit, st_cd.cd_ndevs)); /* * Only allow one at a time */ if (sc_link->flags & SDEV_OPEN) { printf("%s: already open\n", st->sc_dev.dv_xname); return (EBUSY); } if ((error = scsipi_adapter_addref(sc_link)) != 0) return (error); /* * clear any latched errors. */ st->mt_resid = 0; st->mt_erreg = 0; st->asc = 0; st->ascq = 0; /* * Catch any unit attention errors. Be silent about this * unless we're already mounted. We ignore media change * if we're in control mode or not mounted yet. */ if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { #ifdef SCSIDEBUG sflags = XS_CTL_IGNORE_MEDIA_CHANGE; #else sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; #endif } else sflags = 0; /* * If we're already mounted or we aren't configured for * a mount delay, only try a test unit ready once. Otherwise, * try up to ST_MOUNT_DELAY times with a rest interval of * one second between each try. */ if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { ntries = 1; } else { ntries = ST_MOUNT_DELAY; } for (error = tries = 0; tries < ntries; tries++) { int slpintr, oflags; /* * If we had no error, or we're opening the control mode * device, we jump out right away. */ error = scsipi_test_unit_ready(sc_link, sflags); if (error == 0 || stmode == CTRL_MODE) { break; } /* * We had an error. * * If we're already mounted or we aren't configured for * a mount delay, or the error isn't a NOT READY error, * skip to the error exit now. */ if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || (st->mt_key != SKEY_NOT_READY)) { goto bad; } /* * clear any latched errors. */ st->mt_resid = 0; st->mt_erreg = 0; st->asc = 0; st->ascq = 0; /* * Fake that we have the device open so * we block other apps from getting in. */ oflags = sc_link->flags; sc_link->flags |= SDEV_OPEN; slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); sc_link->flags = oflags; /* restore flags */ if (slpintr) { goto bad; } } /* * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has * been opened to set defaults and perform other, usually non-I/O * related, operations. In this case, do a quick check to see * whether the unit actually had a tape loaded (this will be known * as to whether or not we got a NOT READY for the above * unit attention). If a tape is there, go do a mount sequence. */ if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { sc_link->flags |= SDEV_OPEN; return (0); } /* * If we get this far and had an error set, that means we failed * to pass the 'test unit ready' test for the non-controlmode device, * so we bounce the open. */ if (error) return (error); /* * Else, we're now committed to saying we're open. */ sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ /* * If it's a different mode, or if the media has been * invalidated, unmount the tape from the previous * session but continue with open processing */ if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) st_unmount(st, NOEJECT); /* * If we are not mounted, then we should start a new * mount session. */ if (!(st->flags & ST_MOUNTED)) { st_mount_tape(dev, flags); st->last_dsty = dsty; } SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); return (0); bad: st_unmount(st, NOEJECT); scsipi_adapter_delref(sc_link); sc_link->flags &= ~SDEV_OPEN; return (error); } /* * close the device.. only called if we are the LAST * occurence of an open device */ int stclose(dev, flags, mode, p) dev_t dev; int flags; int mode; struct proc *p; { int stxx, error = 0; struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); /* * Make sure that a tape opened in write-only mode will have * file marks written on it when closed, even if not written to. * * This is for SUN compatibility. Actually, the Sun way of * things is to: * * only write filemarks if there are fmks to be written and * - open for write (possibly read/write) * - the last operation was a write * or: * - opened for wronly * - no data was written (including filemarks) */ stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); if (((flags & FWRITE) && stxx == ST_WRITTEN) || ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { int nm; error = st_check_eod(st, FALSE, &nm, 0); } switch (STMODE(dev)) { case NORMAL_MODE: st_unmount(st, NOEJECT); break; case NOREW_MODE: case CTRL_MODE: /* * Leave mounted unless media seems to have been removed. * * Otherwise, if we're to terminate a tape with more than one * filemark [ and because we're not rewinding here ], backspace * one filemark so that later appends will see an unbroken * sequence of: * * file - FMK - file - FMK ... file - FMK FMK (EOM) */ if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { st_unmount(st, NOEJECT); } else if (error == 0) { /* * ST_WRITTEN was preserved from above. * * All we need to know here is: * * Were we writing this tape and was the last * operation a write? * * Are there supposed to be 2FM at EOD? * * If both statements are true, then we backspace * one filemark. */ stxx |= (st->flags & ST_2FM_AT_EOD); if ((flags & FWRITE) != 0 && (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { error = st_space(st, -1, SP_FILEMARKS, 0); } } break; case EJECT_MODE: st_unmount(st, EJECT); break; } scsipi_wait_drain(st->sc_link); scsipi_adapter_delref(st->sc_link); st->sc_link->flags &= ~SDEV_OPEN; return (error); } /* * Start a new mount session. * Copy in all the default parameters from the selected device mode. * and try guess any that seem to be defaulted. */ int st_mount_tape(dev, flags) dev_t dev; int flags; { int unit; u_int dsty; struct st_softc *st; struct scsipi_link *sc_link; int error = 0; unit = STUNIT(dev); dsty = STDSTY(dev); st = st_cd.cd_devs[unit]; sc_link = st->sc_link; if (st->flags & ST_MOUNTED) return (0); SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); st->flags |= ST_NEW_MOUNT; st->quirks = st->drive_quirks | st->modes[dsty].quirks; /* * If the media is new, then make sure we give it a chance to * to do a 'load' instruction. (We assume it is new.) */ if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) return (error); /* * Throw another dummy instruction to catch * 'Unit attention' errors. Many drives give * these after doing a Load instruction (with * the MEDIUM MAY HAVE CHANGED asc/ascq). */ scsipi_test_unit_ready(sc_link, XS_CTL_SILENT); /* XXX */ /* * Some devices can't tell you much until they have been * asked to look at the media. This quirk does this. */ if (st->quirks & ST_Q_SENSE_HELP) if ((error = st_touch_tape(st)) != 0) return (error); /* * Load the physical device parameters * loads: blkmin, blkmax */ if ((error = st_read_block_limits(st, 0)) != 0) return (error); /* * Load the media dependent parameters * includes: media_blksize,media_density,numblks * As we have a tape in, it should be reflected here. * If not you may need the "quirk" above. */ if ((error = st_mode_sense(st, 0)) != 0) return (error); /* * If we have gained a permanent density from somewhere, * then use it in preference to the one supplied by * default by the driver. */ if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) st->density = st->modes[dsty].density; else st->density = st->media_density; /* * If we have gained a permanent blocksize * then use it in preference to the one supplied by * default by the driver. */ st->flags &= ~ST_FIXEDBLOCKS; if (st->modeflags[dsty] & (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { st->blksize = st->modes[dsty].blksize; if (st->blksize) st->flags |= ST_FIXEDBLOCKS; } else { if ((error = st_decide_mode(st, FALSE)) != 0) return (error); } if ((error = st_mode_select(st, 0)) != 0) { printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); return (error); } if (!(st->quirks & ST_Q_NOPREVENT)) { scsipi_prevent(sc_link, PR_PREVENT, XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); } st->flags &= ~ST_NEW_MOUNT; st->flags |= ST_MOUNTED; sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ return (0); } /* * End the present mount session. * Rewind, and optionally eject the tape. * Reset various flags to indicate that all new * operations require another mount operation */ void st_unmount(st, eject) struct st_softc *st; boolean eject; { struct scsipi_link *sc_link = st->sc_link; int nmarks; if (!(st->flags & ST_MOUNTED)) return; SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); scsipi_prevent(sc_link, PR_ALLOW, XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); if (eject) st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); sc_link->flags &= ~SDEV_MEDIA_LOADED; } /* * Given all we know about the device, media, mode, 'quirks' and * initial operation, make a decision as to how we should be set * to run (regarding blocking and EOD marks) */ int st_decide_mode(st, first_read) struct st_softc *st; boolean first_read; { #ifdef SCSIDEBUG struct scsipi_link *sc_link = st->sc_link; #endif SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); /* * If the drive can only handle fixed-length blocks and only at * one size, perhaps we should just do that. */ if (st->blkmin && (st->blkmin == st->blkmax)) { st->flags |= ST_FIXEDBLOCKS; st->blksize = st->blkmin; SC_DEBUG(sc_link, SDEV_DB3, ("blkmin == blkmax of %d\n", st->blkmin)); goto done; } /* * If the tape density mandates (or even suggests) use of fixed * or variable-length blocks, comply. */ switch (st->density) { case HALFINCH_800: case HALFINCH_1600: case HALFINCH_6250: case DDS: st->flags &= ~ST_FIXEDBLOCKS; st->blksize = 0; SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); goto done; case QIC_11: case QIC_24: case QIC_120: case QIC_150: case QIC_525: case QIC_1320: case QIC_3095: case QIC_3220: st->flags |= ST_FIXEDBLOCKS; if (st->media_blksize > 0) st->blksize = st->media_blksize; else st->blksize = DEF_FIXED_BSIZE; SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); goto done; } /* * If we're about to read the tape, perhaps we should choose * fixed or variable-length blocks and block size according to * what the drive found on the tape. */ if (first_read && (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || (st->media_blksize == DEF_FIXED_BSIZE) || (st->media_blksize == 1024))) { if (st->media_blksize > 0) st->flags |= ST_FIXEDBLOCKS; else st->flags &= ~ST_FIXEDBLOCKS; st->blksize = st->media_blksize; SC_DEBUG(sc_link, SDEV_DB3, ("Used media_blksize of %d\n", st->media_blksize)); goto done; } /* * We're getting no hints from any direction. Choose variable- * length blocks arbitrarily. */ st->flags &= ~ST_FIXEDBLOCKS; st->blksize = 0; SC_DEBUG(sc_link, SDEV_DB3, ("Give up and default to variable mode\n")); done: /* * Decide whether or not to write two file marks to signify end- * of-data. Make the decision as a function of density. If * the decision is not to use a second file mark, the SCSI BLANK * CHECK condition code will be recognized as end-of-data when * first read. * (I think this should be a by-product of fixed/variable..julian) */ switch (st->density) { /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ case QIC_11: case QIC_24: case QIC_120: case QIC_150: case QIC_525: case QIC_1320: case QIC_3095: case QIC_3220: st->flags &= ~ST_2FM_AT_EOD; break; default: st->flags |= ST_2FM_AT_EOD; } return (0); } /* * Actually translate the requested transfer into * one the physical driver can understand * The transfer is described by a buf and will include * only one physical transfer. */ void ststrategy(bp) struct buf *bp; { struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; int s; SC_DEBUG(st->sc_link, SDEV_DB1, ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); /* * If it's a null transfer, return immediatly */ if (bp->b_bcount == 0) goto done; /* If offset is negative, error */ if (bp->b_blkno < 0) { bp->b_error = EINVAL; goto bad; } /* * Odd sized request on fixed drives are verboten */ if (st->flags & ST_FIXEDBLOCKS) { if (bp->b_bcount % st->blksize) { printf("%s: bad request, must be multiple of %d\n", st->sc_dev.dv_xname, st->blksize); bp->b_error = EIO; goto bad; } } /* * as are out-of-range requests on variable drives. */ else if (bp->b_bcount < st->blkmin || (st->blkmax && bp->b_bcount > st->blkmax)) { printf("%s: bad request, must be between %d and %d\n", st->sc_dev.dv_xname, st->blkmin, st->blkmax); bp->b_error = EIO; goto bad; } s = splbio(); /* * Place it in the queue of activities for this tape * at the end (a bit silly because we only have on user.. * (but it could fork())) */ BUFQ_INSERT_TAIL(&st->buf_queue, bp); /* * Tell the device to get going on the transfer if it's * not doing anything, otherwise just wait for completion * (All a bit silly if we're only allowing 1 open but..) */ ststart(st); splx(s); return; bad: bp->b_flags |= B_ERROR; done: /* * Correctly set the buf to indicate a completed xfer */ bp->b_resid = bp->b_bcount; biodone(bp); return; } /* * ststart looks to see if there is a buf waiting for the device * and that the device is not already busy. If both are true, * It dequeues the buf and creates a scsi command to perform the * transfer required. The transfer request will call scsipi_done * on completion, which will in turn call this routine again * so that the next queued transfer is performed. * The bufs are queued by the strategy routine (ststrategy) * * This routine is also called after other non-queued requests * have been made of the scsi driver, to ensure that the queue * continues to be drained. * ststart() is called at splbio */ void ststart(v) void *v; { struct st_softc *st = v; struct scsipi_link *sc_link = st->sc_link; struct buf *bp; struct scsi_rw_tape cmd; int flags, error; SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); /* * See if there is a buf to do and we are not already * doing one */ while (sc_link->active < sc_link->openings) { /* if a special awaits, let it proceed first */ if (sc_link->flags & SDEV_WAITING) { sc_link->flags &= ~SDEV_WAITING; wakeup((caddr_t)sc_link); return; } if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) return; BUFQ_REMOVE(&st->buf_queue, bp); /* * If the device has been unmounted by the user * then throw away all requests until done. */ if (!(st->flags & ST_MOUNTED) || !(sc_link->flags & SDEV_MEDIA_LOADED)) { /* make sure that one implies the other.. */ sc_link->flags &= ~SDEV_MEDIA_LOADED; bp->b_flags |= B_ERROR; bp->b_error = EIO; bp->b_resid = bp->b_bcount; biodone(bp); continue; } /* * only FIXEDBLOCK devices have pending I/O or space operations. */ if (st->flags & ST_FIXEDBLOCKS) { /* * If we are at a filemark but have not reported it yet * then we should report it now */ if (st->flags & ST_AT_FILEMARK) { if ((bp->b_flags & B_READ) == B_WRITE) { /* * Handling of ST_AT_FILEMARK in * st_space will fill in the right file * mark count. * Back up over filemark */ if (st_space(st, 0, SP_FILEMARKS, 0)) { bp->b_flags |= B_ERROR; bp->b_error = EIO; biodone(bp); continue; } } else { bp->b_resid = bp->b_bcount; bp->b_error = 0; bp->b_flags &= ~B_ERROR; st->flags &= ~ST_AT_FILEMARK; biodone(bp); continue; /* seek more work */ } } } /* * If we are at EOM but have not reported it * yet then we should report it now. */ if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { bp->b_resid = bp->b_bcount; if (st->flags & ST_EIO_PENDING) { bp->b_error = EIO; bp->b_flags |= B_ERROR; } st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); biodone(bp); continue; /* seek more work */ } /* * Fill out the scsi command */ bzero(&cmd, sizeof(cmd)); if ((bp->b_flags & B_READ) == B_WRITE) { cmd.opcode = WRITE; st->flags &= ~ST_FM_WRITTEN; flags = XS_CTL_DATA_OUT; } else { cmd.opcode = READ; flags = XS_CTL_DATA_IN; } /* * Handle "fixed-block-mode" tape drives by using the * block count instead of the length. */ if (st->flags & ST_FIXEDBLOCKS) { cmd.byte2 |= SRW_FIXED; _lto3b(bp->b_bcount / st->blksize, cmd.len); } else _lto3b(bp->b_bcount, cmd.len); /* * go ask the adapter to do all this for us * XXX Really need NOSLEEP? */ error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)bp->b_data, bp->b_bcount, 0, ST_IO_TIME, bp, flags | XS_CTL_NOSLEEP | XS_CTL_ASYNC); if (error) { printf("%s: not queued, error %d\n", st->sc_dev.dv_xname, error); } } /* go back and see if we can cram more work in.. */ } void stdone(xs) struct scsipi_xfer *xs; { if (xs->bp != NULL) { struct st_softc *st = xs->sc_link->device_softc; if ((xs->bp->b_flags & B_READ) == B_WRITE) { st->flags |= ST_WRITTEN; } else { st->flags &= ~ST_WRITTEN; } #if NRND > 0 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); #endif } } int stread(dev, uio, iomode) dev_t dev; struct uio *uio; int iomode; { struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; return (physio(ststrategy, NULL, dev, B_READ, st->sc_link->adapter->scsipi_minphys, uio)); } int stwrite(dev, uio, iomode) dev_t dev; struct uio *uio; int iomode; { struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; return (physio(ststrategy, NULL, dev, B_WRITE, st->sc_link->adapter->scsipi_minphys, uio)); } /* * Perform special action on behalf of the user; * knows about the internals of this device */ int stioctl(dev, cmd, arg, flag, p) dev_t dev; u_long cmd; caddr_t arg; int flag; struct proc *p; { int error = 0; int unit; int number, nmarks, dsty; int flags; struct st_softc *st; int hold_blksize; u_int8_t hold_density; struct mtop *mt = (struct mtop *) arg; /* * Find the device that the user is talking about */ flags = 0; /* give error messages, act on errors etc. */ unit = STUNIT(dev); dsty = STDSTY(dev); st = st_cd.cd_devs[unit]; hold_blksize = st->blksize; hold_density = st->density; switch ((u_int) cmd) { case MTIOCGET: { struct mtget *g = (struct mtget *) arg; /* * (to get the current state of READONLY) */ error = st_mode_sense(st, XS_CTL_SILENT); if (error) break; SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); bzero(g, sizeof(struct mtget)); g->mt_type = 0x7; /* Ultrix compat *//*? */ g->mt_blksiz = st->blksize; g->mt_density = st->density; g->mt_mblksiz[0] = st->modes[0].blksize; g->mt_mblksiz[1] = st->modes[1].blksize; g->mt_mblksiz[2] = st->modes[2].blksize; g->mt_mblksiz[3] = st->modes[3].blksize; g->mt_mdensity[0] = st->modes[0].density; g->mt_mdensity[1] = st->modes[1].density; g->mt_mdensity[2] = st->modes[2].density; g->mt_mdensity[3] = st->modes[3].density; if (st->flags & ST_READONLY) g->mt_dsreg |= MT_DS_RDONLY; if (st->flags & ST_MOUNTED) g->mt_dsreg |= MT_DS_MOUNTED; g->mt_resid = st->mt_resid; g->mt_erreg = st->mt_erreg; /* * clear latched errors. */ st->mt_resid = 0; st->mt_erreg = 0; st->asc = 0; st->ascq = 0; break; } case MTIOCTOP: { SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, mt->mt_count)); /* compat: in U*x it is a short */ number = mt->mt_count; switch ((short) (mt->mt_op)) { case MTWEOF: /* write an end-of-file record */ error = st_write_filemarks(st, number, flags); break; case MTBSF: /* backward space file */ number = -number; case MTFSF: /* forward space file */ error = st_check_eod(st, FALSE, &nmarks, flags); if (!error) error = st_space(st, number - nmarks, SP_FILEMARKS, flags); break; case MTBSR: /* backward space record */ number = -number; case MTFSR: /* forward space record */ error = st_check_eod(st, TRUE, &nmarks, flags); if (!error) error = st_space(st, number, SP_BLKS, flags); break; case MTREW: /* rewind */ error = st_rewind(st, 0, flags); break; case MTOFFL: /* rewind and put the drive offline */ st_unmount(st, EJECT); break; case MTNOP: /* no operation, sets status only */ break; case MTRETEN: /* retension the tape */ error = st_load(st, LD_RETENSION, flags); if (!error) error = st_load(st, LD_LOAD, flags); break; case MTEOM: /* forward space to end of media */ error = st_check_eod(st, FALSE, &nmarks, flags); if (!error) error = st_space(st, 1, SP_EOM, flags); break; case MTCACHE: /* enable controller cache */ st->flags &= ~ST_DONTBUFFER; goto try_new_value; case MTNOCACHE: /* disable controller cache */ st->flags |= ST_DONTBUFFER; goto try_new_value; case MTERASE: /* erase volume */ error = st_erase(st, number, flags); break; case MTSETBSIZ: /* Set block size for device */ #ifdef NOTYET if (!(st->flags & ST_NEW_MOUNT)) { uprintf("re-mount tape before changing blocksize"); error = EINVAL; break; } #endif if (number == 0) st->flags &= ~ST_FIXEDBLOCKS; else { if ((st->blkmin || st->blkmax) && (number < st->blkmin || number > st->blkmax)) { error = EINVAL; break; } st->flags |= ST_FIXEDBLOCKS; } st->blksize = number; st->flags |= ST_BLOCK_SET; /*XXX */ goto try_new_value; case MTSETDNSTY: /* Set density for device and mode */ /* * Any number >= 0 and <= 0xff is legal. Numbers * above 0x80 are 'vendor unique'. */ if (number < 0 || number > 255) { error = EINVAL; break; } else st->density = number; goto try_new_value; case MTCMPRESS: error = st_cmprss(st, number); break; case MTEWARN: if (number) st->flags |= ST_EARLYWARN; else st->flags &= ~ST_EARLYWARN; break; default: error = EINVAL; } break; } case MTIOCIEOT: case MTIOCEEOT: break; case MTIOCRDSPOS: error = st_rdpos(st, 0, (u_int32_t *) arg); break; case MTIOCRDHPOS: error = st_rdpos(st, 1, (u_int32_t *) arg); break; case MTIOCSLOCATE: error = st_setpos(st, 0, (u_int32_t *) arg); break; case MTIOCHLOCATE: error = st_setpos(st, 1, (u_int32_t *) arg); break; default: error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, flag, p); break; } return (error); /*-----------------------------*/ try_new_value: /* * Check that the mode being asked for is aggreeable to the * drive. If not, put it back the way it was. */ if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); st->density = hold_density; st->blksize = hold_blksize; if (st->blksize) st->flags |= ST_FIXEDBLOCKS; else st->flags &= ~ST_FIXEDBLOCKS; return (error); } /* * As the drive liked it, if we are setting a new default, * set it into the structures as such. * * The means for deciding this are not finalised yet- but * if the device was opened in Control Mode, the values * are persistent now across mounts. */ if (STMODE(dev) == CTRL_MODE) { switch ((short) (mt->mt_op)) { case MTSETBSIZ: st->modes[dsty].blksize = st->blksize; st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; break; case MTSETDNSTY: st->modes[dsty].density = st->density; st->modeflags[dsty] |= DENSITY_SET_BY_USER; break; } } return (0); } /* * Do a synchronous read. */ int st_read(st, buf, size, flags) struct st_softc *st; int size; int flags; char *buf; { struct scsi_rw_tape cmd; /* * If it's a null transfer, return immediatly */ if (size == 0) return (0); bzero(&cmd, sizeof(cmd)); cmd.opcode = READ; if (st->flags & ST_FIXEDBLOCKS) { cmd.byte2 |= SRW_FIXED; _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), cmd.len); } else _lto3b(size, cmd.len); return (scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); } /* * Ask the drive what it's min and max blk sizes are. */ int st_read_block_limits(st, flags) struct st_softc *st; int flags; { struct scsi_block_limits cmd; struct scsi_block_limits_data block_limits; struct scsipi_link *sc_link = st->sc_link; int error; /* * do a 'Read Block Limits' */ bzero(&cmd, sizeof(cmd)); cmd.opcode = READ_BLOCK_LIMITS; /* * do the command, update the global values */ error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); if (error) return (error); st->blkmin = _2btol(block_limits.min_length); st->blkmax = _3btol(block_limits.max_length); SC_DEBUG(sc_link, SDEV_DB3, ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); return (0); } /* * Get the scsi driver to send a full inquiry to the * device and use the results to fill out the global * parameter structure. * * called from: * attach * open * ioctl (to reset original blksize) */ int st_mode_sense(st, flags) struct st_softc *st; int flags; { u_int scsipi_sense_len; int error; struct scsi_mode_sense cmd; struct scsipi_sense { struct scsi_mode_header header; struct scsi_blk_desc blk_desc; u_char sense_data[MAX_PAGE_0_SIZE]; } scsipi_sense; struct scsipi_link *sc_link = st->sc_link; scsipi_sense_len = 12 + st->page_0_size; /* * Set up a mode sense */ bzero(&cmd, sizeof(cmd)); cmd.opcode = SCSI_MODE_SENSE; cmd.length = scsipi_sense_len; /* * do the command, but we don't need the results * just print them for our interest's sake, if asked, * or if we need it as a template for the mode select * store it away. */ error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); if (error) return (error); st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); st->media_density = scsipi_sense.blk_desc.density; if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) st->flags |= ST_READONLY; else st->flags &= ~ST_READONLY; SC_DEBUG(sc_link, SDEV_DB3, ("density code %d, %d-byte blocks, write-%s, ", st->media_density, st->media_blksize, st->flags & ST_READONLY ? "protected" : "enabled")); SC_DEBUG(sc_link, SDEV_DB3, ("%sbuffered\n", scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); if (st->page_0_size) bcopy(scsipi_sense.sense_data, st->sense_data, st->page_0_size); sc_link->flags |= SDEV_MEDIA_LOADED; return (0); } /* * Send a filled out parameter structure to the drive to * set it into the desire modes etc. */ int st_mode_select(st, flags) struct st_softc *st; int flags; { u_int scsi_select_len; struct scsi_mode_select cmd; struct scsi_select { struct scsi_mode_header header; struct scsi_blk_desc blk_desc; u_char sense_data[MAX_PAGE_0_SIZE]; } scsi_select; struct scsipi_link *sc_link = st->sc_link; scsi_select_len = 12 + st->page_0_size; /* * This quirk deals with drives that have only one valid mode * and think this gives them license to reject all mode selects, * even if the selected mode is the one that is supported. */ if (st->quirks & ST_Q_UNIMODAL) { SC_DEBUG(sc_link, SDEV_DB3, ("not setting density 0x%x blksize 0x%x\n", st->density, st->blksize)); return (0); } /* * Set up for a mode select */ bzero(&cmd, sizeof(cmd)); cmd.opcode = SCSI_MODE_SELECT; cmd.length = scsi_select_len; bzero(&scsi_select, scsi_select_len); scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; scsi_select.blk_desc.density = st->density; if (st->flags & ST_DONTBUFFER) scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; else scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; if (st->flags & ST_FIXEDBLOCKS) _lto3b(st->blksize, scsi_select.blk_desc.blklen); if (st->page_0_size) bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); /* * do the command */ return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); } int st_cmprss(st, onoff) struct st_softc *st; int onoff; { u_int scsi_dlen; struct scsi_mode_select mcmd; struct scsi_mode_sense scmd; struct scsi_select { struct scsi_mode_header header; struct scsi_blk_desc blk_desc; u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), sizeof(struct scsi_tape_dev_compression_page))]; } scsi_pdata; struct scsi_tape_dev_conf_page *ptr; struct scsi_tape_dev_compression_page *cptr; struct scsipi_link *sc_link = st->sc_link; int error, ison, flags; scsi_dlen = sizeof(scsi_pdata); bzero(&scsi_pdata, scsi_dlen); /* * Set up for a mode sense. * Do DATA COMPRESSION page first. */ bzero(&scmd, sizeof(scmd)); scmd.opcode = SCSI_MODE_SENSE; scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; scmd.length = scsi_dlen; flags = XS_CTL_SILENT; /* * Do the MODE SENSE command... */ again: bzero(&scsi_pdata, scsi_dlen); error = scsipi_command(sc_link, (struct scsipi_generic *)&scmd, sizeof(scmd), (u_char *)&scsi_pdata, scsi_dlen, ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); if (error) { if (scmd.byte2 != SMS_DBD) { scmd.byte2 = SMS_DBD; goto again; } /* * Try a different page? */ if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; scmd.byte2 = 0; goto again; } return (error); } if (scsi_pdata.header.blk_desc_len) ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; else ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; if ((scmd.page & SMS_PAGE_CODE) == 0xf) { cptr = (struct scsi_tape_dev_compression_page *) ptr; ison = (cptr->dce_dcc & DCP_DCE) != 0; if (onoff) cptr->dce_dcc |= DCP_DCE; else cptr->dce_dcc &= ~DCP_DCE; cptr->pagecode &= ~0x80; } else { ison = (ptr->sel_comp_alg != 0); if (onoff) ptr->sel_comp_alg = 1; else ptr->sel_comp_alg = 0; ptr->pagecode &= ~0x80; ptr->byte2 = 0; ptr->active_partition = 0; ptr->wb_full_ratio = 0; ptr->rb_empty_ratio = 0; ptr->byte8 &= ~0x30; ptr->gap_size = 0; ptr->byte10 &= ~0xe7; ptr->ew_bufsize[0] = 0; ptr->ew_bufsize[1] = 0; ptr->ew_bufsize[2] = 0; ptr->reserved = 0; } onoff = onoff ? 1 : 0; /* * There might be a virtue in actually doing the MODE SELECTS, * but let's not clog the bus over it. */ if (onoff == ison) return (0); /* * Set up for a mode select */ scsi_pdata.header.data_length = 0; scsi_pdata.header.medium_type = 0; if ((st->flags & ST_DONTBUFFER) == 0) scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; else scsi_pdata.header.dev_spec = 0; bzero(&mcmd, sizeof(mcmd)); mcmd.opcode = SCSI_MODE_SELECT; mcmd.byte2 = SMS_PF; mcmd.length = scsi_dlen; if (scsi_pdata.header.blk_desc_len) { scsi_pdata.blk_desc.density = 0; scsi_pdata.blk_desc.nblocks[0] = 0; scsi_pdata.blk_desc.nblocks[1] = 0; scsi_pdata.blk_desc.nblocks[2] = 0; } /* * Do the command */ error = scsipi_command(sc_link, (struct scsipi_generic *)&mcmd, sizeof(mcmd), (u_char *)&scsi_pdata, scsi_dlen, ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { /* * Try DEVICE CONFIGURATION page. */ scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; goto again; } return (error); } /* * issue an erase command */ int st_erase(st, full, flags) struct st_softc *st; int full, flags; { int tmo; struct scsi_erase cmd; /* * Full erase means set LONG bit in erase command, which asks * the drive to erase the entire unit. Without this bit, we're * asking the drive to write an erase gap. */ bzero(&cmd, sizeof(cmd)); cmd.opcode = ERASE; if (full) { cmd.byte2 = SE_IMMED|SE_LONG; tmo = ST_SPC_TIME; } else { tmo = ST_IO_TIME; cmd.byte2 = SE_IMMED; } /* * XXX We always do this asynchronously, for now. How long should * we wait if we want to (eventually) to it synchronously? */ return (scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, tmo, NULL, flags)); } /* * skip N blocks/filemarks/seq filemarks/eom */ int st_space(st, number, what, flags) struct st_softc *st; u_int what; int flags; int number; { struct scsi_space cmd; int error; switch (what) { case SP_BLKS: if (st->flags & ST_PER_ACTION) { if (number > 0) { st->flags &= ~ST_PER_ACTION; return (EIO); } else if (number < 0) { if (st->flags & ST_AT_FILEMARK) { /* * Handling of ST_AT_FILEMARK * in st_space will fill in the * right file mark count. */ error = st_space(st, 0, SP_FILEMARKS, flags); if (error) return (error); } if (st->flags & ST_BLANK_READ) { st->flags &= ~ST_BLANK_READ; return (EIO); } st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); } } break; case SP_FILEMARKS: if (st->flags & ST_EIO_PENDING) { if (number > 0) { /* pretend we just discovered the error */ st->flags &= ~ST_EIO_PENDING; return (EIO); } else if (number < 0) { /* back away from the error */ st->flags &= ~ST_EIO_PENDING; } } if (st->flags & ST_AT_FILEMARK) { st->flags &= ~ST_AT_FILEMARK; number--; } if ((st->flags & ST_BLANK_READ) && (number < 0)) { /* back away from unwritten tape */ st->flags &= ~ST_BLANK_READ; number++; /* XXX dubious */ } break; case SP_EOM: if (st->flags & ST_EOM_PENDING) { /* we're already there */ st->flags &= ~ST_EOM_PENDING; return (0); } if (st->flags & ST_EIO_PENDING) { /* pretend we just discovered the error */ st->flags &= ~ST_EIO_PENDING; return (EIO); } if (st->flags & ST_AT_FILEMARK) st->flags &= ~ST_AT_FILEMARK; break; } if (number == 0) return (0); bzero(&cmd, sizeof(cmd)); cmd.opcode = SPACE; cmd.byte2 = what; _lto3b(number, cmd.number); return (scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, 0, ST_SPC_TIME, NULL, flags)); } /* * write N filemarks */ int st_write_filemarks(st, number, flags) struct st_softc *st; int flags; int number; { struct scsi_write_filemarks cmd; /* * It's hard to write a negative number of file marks. * Don't try. */ if (number < 0) return (EINVAL); switch (number) { case 0: /* really a command to sync the drive's buffers */ break; case 1: if (st->flags & ST_FM_WRITTEN) /* already have one down */ st->flags &= ~ST_WRITTEN; else st->flags |= ST_FM_WRITTEN; st->flags &= ~ST_PER_ACTION; break; default: st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); } bzero(&cmd, sizeof(cmd)); cmd.opcode = WRITE_FILEMARKS; _lto3b(number, cmd.number); return (scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); } /* * Make sure the right number of file marks is on tape if the * tape has been written. If the position argument is true, * leave the tape positioned where it was originally. * * nmarks returns the number of marks to skip (or, if position * true, which were skipped) to get back original position. */ int st_check_eod(st, position, nmarks, flags) struct st_softc *st; boolean position; int *nmarks; int flags; { int error; switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { default: *nmarks = 0; return (0); case ST_WRITTEN: case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: *nmarks = 1; break; case ST_WRITTEN | ST_2FM_AT_EOD: *nmarks = 2; } error = st_write_filemarks(st, *nmarks, flags); if (position && !error) error = st_space(st, -*nmarks, SP_FILEMARKS, flags); return (error); } /* * load/unload/retension */ int st_load(st, type, flags) struct st_softc *st; u_int type; int flags; { int error; struct scsi_load cmd; if (type != LD_LOAD) { int nmarks; error = st_check_eod(st, FALSE, &nmarks, flags); if (error) { printf("%s: failed to write closing filemarks at " "unload, errno=%d\n", st->sc_dev.dv_xname, error); return (error); } } if (st->quirks & ST_Q_IGNORE_LOADS) { if (type == LD_LOAD) { /* * If we ignore loads, at least we should try a rewind. */ return st_rewind(st, 0, flags); } /* otherwise, we should do what's asked of us */ } bzero(&cmd, sizeof(cmd)); cmd.opcode = LOAD; cmd.how = type; error = scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); if (error) { printf("%s: error %d in st_load (op %d)\n", st->sc_dev.dv_xname, error, type); } return (error); } /* * Rewind the device */ int st_rewind(st, immediate, flags) struct st_softc *st; u_int immediate; int flags; { struct scsi_rewind cmd; int error; int nmarks; error = st_check_eod(st, FALSE, &nmarks, flags); if (error) { printf("%s: failed to write closing filemarks at " "rewind, errno=%d\n", st->sc_dev.dv_xname, error); return (error); } st->flags &= ~ST_PER_ACTION; bzero(&cmd, sizeof(cmd)); cmd.opcode = REWIND; cmd.byte2 = immediate; error = scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); if (error) { printf("%s: error %d trying to rewind\n", st->sc_dev.dv_xname, error); } return (error); } int st_rdpos(st, hard, blkptr) struct st_softc *st; int hard; u_int32_t *blkptr; { int error; u_int8_t posdata[20]; struct scsi_tape_read_position cmd; /* * First flush any pending writes... */ error = st_write_filemarks(st, 0, XS_CTL_SILENT); /* * The latter case is for 'write protected' tapes * which are too stupid to recognize a zero count * for writing filemarks as a no-op. */ if (error != 0 && error != EACCES && error != EROFS) return (error); bzero(&cmd, sizeof(cmd)); bzero(&posdata, sizeof(posdata)); cmd.opcode = READ_POSITION; if (hard) cmd.byte1 = 1; error = scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); if (error == 0) { #if 0 printf("posdata:"); for (hard = 0; hard < sizeof(posdata); hard++) printf("%02x ", posdata[hard] & 0xff); printf("\n"); #endif if (posdata[0] & 0x4) /* Block Position Unknown */ error = EINVAL; else *blkptr = _4btol(&posdata[4]); } return (error); } int st_setpos(st, hard, blkptr) struct st_softc *st; int hard; u_int32_t *blkptr; { int error; struct scsi_tape_locate cmd; /* * First flush any pending writes. Strictly speaking, * we're not supposed to have to worry about this, * but let's be untrusting. */ error = st_write_filemarks(st, 0, XS_CTL_SILENT); /* * The latter case is for 'write protected' tapes * which are too stupid to recognize a zero count * for writing filemarks as a no-op. */ if (error != 0 && error != EACCES && error != EROFS) return (error); bzero(&cmd, sizeof(cmd)); cmd.opcode = LOCATE; if (hard) cmd.byte2 = 1 << 2; _lto4b(*blkptr, cmd.blkaddr); error = scsipi_command(st->sc_link, (struct scsipi_generic *)&cmd, sizeof(cmd), NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); /* * XXX: Note file && block number position now unknown (if * XXX: these things ever start being maintained in this driver) */ return (error); } /* * Look at the returned sense and act on the error and determine * the unix error number to pass back..., 0 (== report no error), * -1 = retry the operation, -2 continue error processing. */ int st_interpret_sense(xs) struct scsipi_xfer *xs; { struct scsipi_link *sc_link = xs->sc_link; struct scsipi_sense_data *sense = &xs->sense.scsi_sense; struct buf *bp = xs->bp; struct st_softc *st = sc_link->device_softc; int retval = SCSIRET_CONTINUE; int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); u_int8_t key; int32_t info; /* * If it isn't a extended or extended/deferred error, let * the generic code handle it. */ if ((sense->error_code & SSD_ERRCODE) != 0x70 && (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ return (retval); } if (sense->error_code & SSD_ERRCODE_VALID) info = _4btol(sense->info); else info = xs->datalen; /* bad choice if fixed blocks */ key = sense->flags & SSD_KEY; st->mt_erreg = key; st->asc = sense->add_sense_code; st->ascq = sense->add_sense_code_qual; st->mt_resid = (short) info; /* * If the device is not open yet, let generic handle */ if ((sc_link->flags & SDEV_OPEN) == 0) { return (retval); } if (st->flags & ST_FIXEDBLOCKS) { xs->resid = info * st->blksize; if (sense->flags & SSD_EOM) { if ((st->flags & ST_EARLYWARN) == 0) st->flags |= ST_EIO_PENDING; st->flags |= ST_EOM_PENDING; if (bp) bp->b_resid = xs->resid; } if (sense->flags & SSD_FILEMARK) { st->flags |= ST_AT_FILEMARK; if (bp) bp->b_resid = xs->resid; } if (sense->flags & SSD_ILI) { st->flags |= ST_EIO_PENDING; if (bp) bp->b_resid = xs->resid; if (sense->error_code & SSD_ERRCODE_VALID && (xs->xs_control & XS_CTL_SILENT) == 0) printf("%s: block wrong size, %d blocks " "residual\n", st->sc_dev.dv_xname, info); /* * This quirk code helps the drive read * the first tape block, regardless of * format. That is required for these * drives to return proper MODE SENSE * information. */ if ((st->quirks & ST_Q_SENSE_HELP) && !(sc_link->flags & SDEV_MEDIA_LOADED)) st->blksize -= 512; } /* * If data wanted and no data was tranfered, do it immediatly */ if (xs->datalen && xs->resid >= xs->datalen) { if (st->flags & ST_EIO_PENDING) return (EIO); if (st->flags & ST_AT_FILEMARK) { if (bp) bp->b_resid = xs->resid; return (SCSIRET_NOERROR); } } } else { /* must be variable mode */ if (sense->flags & SSD_EOM) { /* * The current semantics of this * driver requires EOM detection * to return EIO unless early * warning detection is enabled * for variable mode (this is always * on for fixed block mode). */ if (st->flags & ST_EARLYWARN) { st->flags |= ST_EOM_PENDING; retval = SCSIRET_NOERROR; } else { retval = EIO; } /* * If it's an unadorned EOM detection, * suppress printing an error. */ if (key == SKEY_NO_SENSE) { doprint = 0; } } else if (sense->flags & SSD_FILEMARK) { retval = SCSIRET_NOERROR; } else if (sense->flags & SSD_ILI) { if (info < 0) { /* * The tape record was bigger than the read * we issued. */ if ((xs->xs_control & XS_CTL_SILENT) == 0) { printf("%s: %d-byte tape record too big" " for %d-byte user buffer\n", st->sc_dev.dv_xname, xs->datalen - info, xs->datalen); } retval = EIO; } else { retval = SCSIRET_NOERROR; } } xs->resid = info; if (bp) bp->b_resid = info; } #ifndef SCSIDEBUG if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { doprint = 0; } #endif if (key == SKEY_BLANK_CHECK) { /* * This quirk code helps the drive read the * first tape block, regardless of format. That * is required for these drives to return proper * MODE SENSE information. */ if ((st->quirks & ST_Q_SENSE_HELP) && !(sc_link->flags & SDEV_MEDIA_LOADED)) { /* still starting */ st->blksize -= 512; } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { st->flags |= ST_BLANK_READ; xs->resid = xs->datalen; if (bp) { bp->b_resid = xs->resid; /* return an EOF */ } retval = SCSIRET_NOERROR; } } /* * If generic sense processing will continue, we should not * print sense info here. */ if (retval == SCSIRET_CONTINUE) doprint = 0; if (doprint) { #ifdef SCSIVERBOSE scsipi_print_sense(xs, 0); #else xs->sc_link->sc_print_addr(xs->sc_link); printf("Sense Key 0x%02x", key); if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { switch (key) { case SKEY_NOT_READY: case SKEY_ILLEGAL_REQUEST: case SKEY_UNIT_ATTENTION: case SKEY_WRITE_PROTECT: break; case SKEY_BLANK_CHECK: printf(", requested size: %d (decimal)", info); break; case SKEY_ABORTED_COMMAND: if (xs->retries) printf(", retrying"); printf(", cmd 0x%x, info 0x%x", xs->cmd->opcode, info); break; default: printf(", info = %d (decimal)", info); } } if (sense->extra_len != 0) { int n; printf(", data ="); for (n = 0; n < sense->extra_len; n++) printf(" %02x", sense->cmd_spec_info[n]); } printf("\n"); #endif } return (retval); } /* * The quirk here is that the drive returns some value to st_mode_sense * incorrectly until the tape has actually passed by the head. * * The method is to set the drive to large fixed-block state (user-specified * density and 1024-byte blocks), then read and rewind to get it to sense the * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't * work, as a last resort, try variable- length blocks. The result will be * the ability to do an accurate st_mode_sense. * * We know we can do a rewind because we just did a load, which implies rewind. * Rewind seems preferable to space backward if we have a virgin tape. * * The rest of the code for this quirk is in ILI processing and BLANK CHECK * error processing, both part of st_interpret_sense. */ int st_touch_tape(st) struct st_softc *st; { char *buf; int readsize; int error; buf = malloc(1024, M_TEMP, M_NOWAIT); if (buf == NULL) return (ENOMEM); if ((error = st_mode_sense(st, 0)) != 0) goto bad; st->blksize = 1024; do { switch (st->blksize) { case 512: case 1024: readsize = st->blksize; st->flags |= ST_FIXEDBLOCKS; break; default: readsize = 1; st->flags &= ~ST_FIXEDBLOCKS; } if ((error = st_mode_select(st, 0)) != 0) { /* * The device did not agree with the proposed * block size. If we exhausted our options, * return failure, else try another. */ if (readsize == 1) goto bad; st->blksize -= 512; continue; } st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ if ((error = st_rewind(st, 0, 0)) != 0) { bad: free(buf, M_TEMP); return (error); } } while (readsize != 1 && readsize > st->blksize); free(buf, M_TEMP); return (0); } int stdump(dev, blkno, va, size) dev_t dev; daddr_t blkno; caddr_t va; size_t size; { /* Not implemented. */ return (ENXIO); }