diff options
Diffstat (limited to 'sys/scsi/st.c')
| -rw-r--r-- | sys/scsi/st.c | 3440 |
1 files changed, 1499 insertions, 1941 deletions
diff --git a/sys/scsi/st.c b/sys/scsi/st.c index abd39e8cf952..2bc6e494e013 100644 --- a/sys/scsi/st.c +++ b/sys/scsi/st.c @@ -12,13 +12,24 @@ * on the understanding that TFS is not responsible for the correct * functioning of this software in any circumstances. * + * + * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE + * -------------------- ----- ---------------------- + * CURRENT PATCH LEVEL: 1 00098 + * -------------------- ----- ---------------------- + * + * 16 Feb 93 Julian Elischer ADDED for SCSI system + * 1.15 is the last version to support MACH and OSF/1 + */ +/* $Revision: 1.15 $ */ + +/* * 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 * - * $Id: st.c,v 1.12 1993/10/20 15:49:02 rgrimes Exp $ + * $Id: st.c,v 1.15 1994/01/29 10:30:41 rgrimes Exp $ */ - /* * To do: * work out some better way of guessing what a good timeout is going @@ -41,886 +52,882 @@ #include <sys/user.h> #include <sys/mtio.h> - #include <scsi/scsi_all.h> #include <scsi/scsi_tape.h> #include <scsi/scsiconf.h> - -long int ststrats,stqueues; +u_int32 ststrats, stqueues; /* Defines for device specific stuff */ #define PAGE_0_SENSE_DATA_SIZE 12 #define PAGESIZ 4096 #define DEF_FIXED_BSIZE 512 -#define STQSIZE 4 -#define ST_RETRIES 4 - +#define ST_RETRIES 4 /* only on non IO commands */ #define MODE(z) ( (minor(z) & 0x03) ) #define DSTY(z) ( ((minor(z) >> 2) & 0x03) ) #define UNIT(z) ( (minor(z) >> 4) ) - -#define DSTY3 3 -#define DSTY2 2 -#define DSTY1 1 +#define CTLMODE 3 #define SCSI_2_MAX_DENSITY_CODE 0x17 /* maximum density code specified - in SCSI II spec. */ -/***************************************************************\ -* 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 -{ - int quirks; /* same definitions as in rogues */ - char density; - char spare[3]; + * in SCSI II spec. */ +/* + * 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_int32 blksiz; + u_int32 quirks; /* same definitions as in rogues */ + char density; + char spare[3]; }; -struct rogues -{ - char *name; - char *manu; - char *model; - char *version; - int quirks; /* valid for all modes */ - struct modes modes[4]; + +struct rogues { + char *name; + char *manu; + char *model; + char *version; + u_int32 quirks; /* valid for all modes */ + struct modes modes[4]; }; /* define behaviour codes (quirks) */ #define ST_Q_NEEDS_PAGE_0 0x00001 #define ST_Q_FORCE_FIXED_MODE 0x00002 #define ST_Q_FORCE_VAR_MODE 0x00004 -#define ST_Q_SNS_HLP 0x00008 /* must do READ for good MODE SENSE */ +#define ST_Q_SNS_HLP 0x00008 /* must do READ for good MODE SENSE */ #define ST_Q_IGNORE_LOADS 0x00010 -#define ST_Q_BLKSIZ 0x00020 /* variable-block media_blksiz > 0 */ +#define ST_Q_BLKSIZ 0x00020 /* variable-block media_blksiz > 0 */ -static struct rogues gallery[] = /* ends with an all null entry */ +static struct rogues gallery[] = /* ends with an all-null entry */ { - { "Such an old device ", "pre-scsi", " unknown model ","????", - 0, - { {ST_Q_FORCE_FIXED_MODE,0}, /* minor 0,1,2,3 */ - {ST_Q_FORCE_FIXED_MODE,QIC_24}, /* minor 4,5,6,7 */ - {ST_Q_FORCE_VAR_MODE,HALFINCH_1600}, /* minor 8,9,10,11*/ - {ST_Q_FORCE_VAR_MODE,HALFINCH_6250} /* minor 12,13,14,15*/ - } - }, - { "Tandberg tdc3600", "TANDBERG", " TDC 3600","????", - ST_Q_NEEDS_PAGE_0, - { {0,0}, /* minor 0,1,2,3*/ - {ST_Q_FORCE_VAR_MODE,QIC_525}, /* minor 4,5,6,7*/ - {0,QIC_150}, /* minor 8,9,10,11*/ - {0,QIC_120} /* minor 12,13,14,15*/ - } - }, - { "Rev 5 of the Archive 2525", "ARCHIVE ", "VIPER 2525 25462","-005", - 0, - { {ST_Q_SNS_HLP,0}, /* minor 0,1,2,3*/ - {ST_Q_SNS_HLP,QIC_525}, /* minor 4,5,6,7*/ - {0,QIC_150}, /* minor 8,9,10,11*/ - {0,QIC_120} /* minor 12,13,14,15*/ - } - }, - { "Archive Viper 150", "ARCHIVE ", "VIPER 150","????", - ST_Q_NEEDS_PAGE_0, - { {0,0}, /* minor 0,1,2,3*/ - {0,QIC_150}, /* minor 4,5,6,7*/ - {0,QIC_120}, /* minor 8,9,10,11*/ - {0,QIC_24} /* minor 12,13,14,15*/ - } - }, - { "Wangtek 5525ES", "WANGTEK ", "5525ES SCSI REV7", "????", - 0, - { {0,0}, /* minor 0,1,2,3*/ - {ST_Q_BLKSIZ,QIC_525}, /* minor 4,5,6,7*/ - {0,QIC_150}, /* minor 8,9,10,11*/ - {0,QIC_120} /* minor 12,13,14,15*/ - } - }, - {(char *)0} + {"Such an old device ", "pre-scsi", " unknown model ", "????", + 0, + { + {512, ST_Q_FORCE_FIXED_MODE, 0}, /* minor 0,1,2,3 */ + {512, ST_Q_FORCE_FIXED_MODE, QIC_24}, /* minor 4,5,6,7 */ + {0, ST_Q_FORCE_VAR_MODE, HALFINCH_1600}, /* minor 8,9,10,11 */ + {0, ST_Q_FORCE_VAR_MODE, HALFINCH_6250} /* minor 12,13,14,15 */ + } + }, + {"Tandberg tdc3600", "TANDBERG", " TDC 3600", "????", + ST_Q_NEEDS_PAGE_0, + { + {0, 0, 0}, /* minor 0,1,2,3 */ + {0, ST_Q_FORCE_VAR_MODE, QIC_525}, /* minor 4,5,6,7 */ + {0, 0, QIC_150}, /* minor 8,9,10,11 */ + {0, 0, QIC_120} /* minor 12,13,14,15 */ + } + }, + {"Rev 5 of the Archive 2525", "ARCHIVE ", "VIPER 2525 25462", "-005", + 0, + { + {0, ST_Q_SNS_HLP, 0}, /* minor 0,1,2,3 */ + {0, ST_Q_SNS_HLP, QIC_525}, /* minor 4,5,6,7 */ + {0, 0, QIC_150}, /* minor 8,9,10,11 */ + {0, 0, QIC_120} /* minor 12,13,14,15 */ + } + }, + {"Archive Viper 150", "ARCHIVE ", "VIPER 150", "????", + ST_Q_NEEDS_PAGE_0, + { + {0, 0, 0}, /* minor 0,1,2,3 */ + {0, 0, QIC_150}, /* minor 4,5,6,7 */ + {0, 0, QIC_120}, /* minor 8,9,10,11 */ + {0, 0, QIC_24} /* minor 12,13,14,15 */ + } + }, + {"Wangtek 5525ES", "WANGTEK ", "5525ES SCSI REV7", "????", + 0, + { + {0, 0, 0}, /* minor 0,1,2,3 */ + {0, ST_Q_BLKSIZ, QIC_525}, /* minor 4,5,6,7 */ + {0, 0, QIC_150}, /* minor 8,9,10,11 */ + {0, 0, QIC_120} /* minor 12,13,14,15 */ + } + }, + {"WangDAT model 1300", "WangDAT ", "Model 1300", "????", + 0, + { + {0, 0, 0}, /* minor 0,1,2,3 */ + {512, ST_Q_FORCE_FIXED_MODE, 0x13}, /* minor 4,5,6,7 */ + {1024, ST_Q_FORCE_FIXED_MODE, 0x13}, /* minor 8,9,10,11 */ + {0, ST_Q_FORCE_VAR_MODE, 0x13} /* minor 12,13,14,15 */ + } + }, + {(char *) 0} }; - -int ststrategy(); -void stminphys(); +errval st_space __P((u_int32 unit, int32 number, u_int32 what, u_int32 flags)); +errval st_rewind __P((u_int32 unit, boolean immed, u_int32 flags)); +errval st_mode_sense __P((u_int32 unit, u_int32 flags)); +errval st_decide_mode __P((u_int32 unit, boolean first_read)); +errval st_rd_blk_lim __P((u_int32 unit, u_int32 flags)); +errval st_touch_tape __P((u_int32 unit)); +errval st_write_filemarks __P((u_int32 unit, int32 number, u_int32 flags)); +errval st_load __P((u_int32 unit, u_int32 type, u_int32 flags)); +errval st_mode_select __P((u_int32 unit, u_int32 flags)); +void ststrategy(); +void stminphys(); +int32 st_chkeod(); +errval stattach(); +void ststart(); +void st_unmount(); +errval st_mount_tape(); +void st_loadquirks(); +void st_identify_drive(); +errval st_interpret_sense(); #define ESUCCESS 0 +#define NOEJECT 0 +#define EJECT 1 -#ifdef STDEBUG -int st_debug = 1; -#endif /*STDEBUG*/ - -int stattach(); -int st_done(); - -struct st_data +struct scsi_device st_switch = { + st_interpret_sense, /* check errors with us first */ + ststart, /* we have a queue, and this is how we service it */ + NULL, + NULL, /* use the default 'done' routine */ + "st", + 0, + { 0, 0 } +}; + +struct st_data { /*--------------------present operating parameters, flags etc.----------------*/ - int flags; /* see below */ - int blksiz; /* blksiz we are using */ - int density; /* present density */ - int quirks; /* quirks for the open mode */ - int last_dsty; /* last density used */ + u_int32 flags; /* see below */ + u_int32 blksiz; /* blksiz we are using */ + u_int32 density; /* present density */ + u_int32 quirks; /* quirks for the open mode */ + u_int32 last_dsty; /* last density openned */ /*--------------------device/scsi parameters----------------------------------*/ - struct scsi_switch *sc_sw; /* address of scsi low level switch */ - int ctlr; /* so they know which one we want */ - int targ; /* our scsi target ID */ - int lu; /* our scsi lu */ + struct scsi_link *sc_link; /* our link to the adpter etc. */ /*--------------------parameters reported by the device ----------------------*/ - int blkmin; /* min blk size */ - int blkmax; /* max blk size */ + u_int32 blkmin; /* min blk size */ + u_int32 blkmax; /* max blk size */ + struct rogues *rogues; /* if we have a rogue entry */ /*--------------------parameters reported by the device for this media--------*/ - int numblks; /* nominal blocks capacity */ - int media_blksiz; /* 0 if not ST_FIXEDBLOCKS */ - int media_density; /* this is what it said when asked */ + u_int32 numblks; /* nominal blocks capacity */ + u_int32 media_blksiz; /* 0 if not ST_FIXEDBLOCKS */ + u_int32 media_density; /* this is what it said when asked */ /*--------------------quirks for the whole drive------------------------------*/ - int drive_quirks; /* quirks of this drive */ + u_int32 drive_quirks; /* quirks of this drive */ /*--------------------How we should set up when openning each minor device----*/ - struct modes modes[4]; /* plus more for each mode */ + struct modes modes[4]; /* plus more for each mode */ + u_int8 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------------*/ - unsigned char sense_data[12]; /* additional sense data needed */ - /* for mode sense/select. */ - struct buf *buf_queue; /* the queue of pending IO operations */ - struct scsi_xfer scsi_xfer; /* The scsi xfer struct for this drive*/ - int xfer_block_wait; /* whether there is a process waiting */ -}*st_data[NST]; + unsigned char sense_data[12]; /* + * additional sense data needed + * for mode sense/select. + */ + struct buf *buf_queue; /* the queue of pending IO operations */ + struct scsi_xfer scsi_xfer; /* scsi xfer struct for this drive */ + u_int32 xfer_block_wait; /* is a process waiting? */ +} *st_data[NST]; + #define ST_INITIALIZED 0x01 #define ST_INFO_VALID 0x02 #define ST_OPEN 0x04 -#define ST_BLOCK_SET 0x08 /* block size, mode set by ioctl */ -#define ST_WRITTEN 0x10 /* data have been written, EOD needed */ +#define ST_BLOCK_SET 0x08 /* block size, mode set by ioctl */ +#define ST_WRITTEN 0x10 /* data have been written, EOD needed */ #define ST_FIXEDBLOCKS 0x20 #define ST_AT_FILEMARK 0x40 -#define ST_EIO_PENDING 0x80 /* we couldn't report it then (had data)*/ -#define ST_AT_BOM 0x100 /* ops history suggests Beg of Medium */ -#define ST_READONLY 0x200 /* st_mode_sense says write protected */ -#define ST_FM_WRITTEN 0x400 /* EOF file mark written -- */ - /* used with ~ST_WRITTEN to indicate */ - /* that multiple file marks have been */ - /* written */ -#define ST_BLANK_READ 0x800 /* BLANK CHECK encountered already */ -#define ST_2FM_AT_EOD 0x1000 /* write 2 file marks at EOD */ +#define ST_EIO_PENDING 0x80 /* we couldn't report it then (had data) */ +#define ST_NEW_MOUNT 0x100 /* still need to decide mode */ +#define ST_READONLY 0x200 /* st_mode_sense says write protected */ +#define ST_FM_WRITTEN 0x400 /* + * EOF file mark written -- used with + * ~ST_WRITTEN to indicate that multiple file + * marks have been written + */ +#define ST_BLANK_READ 0x800 /* BLANK CHECK encountered already */ +#define ST_2FM_AT_EOD 0x1000 /* write 2 file marks at EOD */ +#define ST_MOUNTED 0x2000 /* Device is presently mounted */ #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_BLANK_READ) -#define ST_PER_OPEN ST_OPEN -#define ST_PER_MEDIA (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ - ST_FIXEDBLOCKS | ST_AT_BOM | ST_READONLY | \ +#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) -static int next_st_unit = 0; -/***********************************************************************\ -* The routine called by the low level scsi routine when it discovers * -* A device suitable for this driver * -\***********************************************************************/ +static u_int32 next_st_unit = 0; -int stattach(ctlr,targ,lu,scsi_switch) -struct scsi_switch *scsi_switch; +/* + * The routine called by the low level scsi routine when it discovers + * A device suitable for this driver + */ + +errval +stattach(sc_link) + struct scsi_link *sc_link; { - int unit,i; + u_int32 unit; struct st_data *st; -#ifdef STDEBUG - if(scsi_debug & PRINTROUTINES) printf("stattach: "); -#endif /*STDEBUG*/ - /*******************************************************\ - * Check we have the resources for another drive * - \*******************************************************/ + SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); + /* + * Check we have the resources for another drive + */ unit = next_st_unit++; - if( unit >= NST) - { + + if (unit >= NST) { printf("Too many scsi tapes..(%d > %d) reconfigure kernel\n", - (unit + 1),NST); - return(0); + (unit + 1), NST); + return 0; } - if(st_data[unit]) - { - printf("st%d: Already has storage!\n",unit); - return(0); + if (st_data[unit]) { + printf("st%d: Already has storage!\n", unit); + return 0; } - st = st_data[unit] = malloc(sizeof(struct st_data),M_DEVBUF,M_NOWAIT); - if(!st) - { - printf("st%d: malloc failed in st.c\n",unit); - return(0); + sc_link->device = &st_switch; + sc_link->dev_unit = unit; + st = st_data[unit] = malloc(sizeof(struct st_data), M_DEVBUF, M_NOWAIT); + if (!st) { + printf("st%d: malloc failed in st.c\n", unit); + return 0; } - bzero(st,sizeof(struct st_data)); - - /*******************************************************\ - * Store information needed to contact our base driver * - \*******************************************************/ - st->sc_sw = scsi_switch; - st->ctlr = ctlr; - st->targ = targ; - st->lu = lu; - - /*******************************************************\ - * Store information about default densities * - \*******************************************************/ - st->modes[DSTY1].density = QIC_525; - st->modes[DSTY2].density = QIC_150; - st->modes[DSTY3].density = QIC_120; - - /*******************************************************\ - * Check if the drive is a known criminal and take * - * Any steps needed to bring it into line * - \*******************************************************/ + bzero(st, sizeof(struct st_data)); + + /* + * Store information needed to contact our base driver + */ + st->sc_link = sc_link; + + /* + * Check if the drive is a known criminal and take + * Any steps needed to bring it into line + */ st_identify_drive(unit); - /*******************************************************\ - * Use the subdriver to request information regarding * - * the drive. We cannot use interrupts yet, so the * - * request must specify this. * - \*******************************************************/ - if(st_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT)) - { + /* + * Use the subdriver to request information regarding + * the drive. We cannot use interrupts yet, so the + * request must specify this. + */ + if (st_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT)) { printf("st%d: drive offline\n", unit); - } - else - { - if(!st_test_ready(unit,SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT)) - { - printf("st%d: density code 0x%x, ", - unit, st->media_density); - if (st->media_blksiz) - { + } else { + printf("st%d: density code 0x%x, ", unit, st->media_density); + if (!scsi_test_unit_ready(sc_link, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT)) { + if (st->media_blksiz) { printf("%d-byte", st->media_blksiz); - } - else - { + } else { printf("variable"); } printf(" blocks, write-%s\n", - st->flags & ST_READONLY ? "protected" : "enabled"); - } - else - { - printf("st%d: drive empty\n", unit); + (st->flags & ST_READONLY) ? "protected" : "enabled"); + } else { + printf(" drive empty\n"); } } - /*******************************************************\ - * Set up the bufs for this device * - \*******************************************************/ - st->buf_queue = 0; - - + /* + * Set up the buf queue for this device + */ + st->buf_queue = 0; st->flags |= ST_INITIALIZED; - return; - + return 0; } -/***********************************************************************\ -* Use the identify routine in 'scsiconf' to get drive info so we can * -* Further tailor our behaviour. * -\***********************************************************************/ - +/* + * Use the inquiry routine in 'scsi_base' to get drive info so we can + * Further tailor our behaviour. + */ +void st_identify_drive(unit) -int unit; + u_int32 unit; { - - struct st_data *st = st_data[unit]; - struct scsi_inquiry_data inqbuf; - struct rogues *finger; - char manu[32]; - char model[32]; - char model2[32]; - char version[32]; - int model_len; - - - /*******************************************************\ - * Get the device type information * - \*******************************************************/ - if (scsi_inquire(st->ctlr, st->targ, st->lu, st->sc_sw, &inqbuf, - SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT) != COMPLETE) - { + struct st_data *st = st_data[unit]; + struct scsi_inquiry_data inqbuf; + struct rogues *finger; + char manu[32]; + char model[32]; + char model2[32]; + char version[32]; + u_int32 model_len; + + /* + * Get the device type information + */ + if (scsi_inquire(st->sc_link, &inqbuf, + SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT) != 0) { printf("st%d: couldn't get device type, using default\n", unit); return; } - if((inqbuf.version & SID_ANSII) == 0) - { - /***********************************************\ - * If not advanced enough, use default values * - \***********************************************/ - strncpy(manu,"pre-scsi",8);manu[8]=0; - strncpy(model," unknown model ",16);model[16]=0; - strncpy(version,"????",4);version[4]=0; + if ((inqbuf.version & SID_ANSII) == 0) { + /* + * If not advanced enough, use default values + */ + strncpy(manu, "pre-scsi", 8); + manu[8] = 0; + strncpy(model, " unknown model ", 16); + model[16] = 0; + strncpy(version, "????", 4); + version[4] = 0; + } else { + strncpy(manu, inqbuf.vendor, 8); + manu[8] = 0; + strncpy(model, inqbuf.product, 16); + model[16] = 0; + strncpy(version, inqbuf.revision, 4); + version[4] = 0; } - else - { - strncpy(manu,inqbuf.vendor,8);manu[8]=0; - strncpy(model,inqbuf.product,16);model[16]=0; - strncpy(version,inqbuf.revision,4);version[4]=0; - } - - /*******************************************************\ - * Load the parameters for this kind of device, so we * - * treat it as appropriate for each operating mode * - * Only check the number of characters in the array's * - * model entry, not the entire model string returned. * - \*******************************************************/ + + /* + * Load the parameters for this kind of device, so we + * treat it as appropriate for each operating mode. + * Only check the number of characters in the array's + * model entry, not the entire model string returned. + */ finger = gallery; - while(finger->name) - { + while (finger->name) { model_len = 0; - while(finger->model[model_len] && (model_len < 32)) - { + while (finger->model[model_len] && (model_len < 32)) { model2[model_len] = model[model_len]; model_len++; } model2[model_len] = 0; - if ((strcmp(manu, finger->manu) == 0 ) - && (strcmp(model2, finger->model) == 0 || - strcmp("????????????????", finger->model) == 0) - && (strcmp(version, finger->version) == 0 || - strcmp("????", finger->version) == 0)) - { - printf("st%d: %s is a known rogue\n", unit,finger->name); - st->modes[0] = finger->modes[0]; - st->modes[1] = finger->modes[1]; - st->modes[2] = finger->modes[2]; - st->modes[3] = finger->modes[3]; - st->drive_quirks= finger->quirks; - st->quirks = finger->quirks; /*start value*/ + if ((strcmp(manu, finger->manu) == 0) + && (strcmp(model2, finger->model) == 0 || + strcmp("????????????????", finger->model) == 0) + && (strcmp(version, finger->version) == 0 || + strcmp("????", finger->version) == 0)) { + printf("st%d: %s is a known rogue\n", unit, finger->name); + st->rogues = finger; + st->drive_quirks = finger->quirks; + st->quirks = finger->quirks; /*start value */ + st_loadquirks(st); break; - } - else - { + } else { finger++; /* go to next suspect */ } } } -/*******************************************************\ -* open the device. * -\*******************************************************/ +/* + * 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_data *st; +{ + int i; + struct modes *mode; + struct modes *mode2; + + if (!st->rogues) + return; + mode = st->rogues->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->blksiz && ((mode->quirks | st->drive_quirks) + & (ST_Q_FORCE_FIXED_MODE))) { + mode2->blksiz = mode->blksiz; + st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; + } else { + if ((mode->quirks | st->drive_quirks) + & ST_Q_FORCE_VAR_MODE) { + mode2->blksiz = 0; + st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; + } + } + if (mode->density) { + mode2->density = mode->density; + st->modeflags[i] |= DENSITY_SET_BY_QUIRK; + } + mode++; + mode2++; + } +} + +/* + * open the device. + */ +errval stopen(dev, flags) -int dev, flags; + dev_t dev; + u_int32 flags; { - int unit,mode,dsty; - int errno = 0; + u_int32 unit, mode, dsty; + errval errno = 0; struct st_data *st; + struct scsi_link *sc_link; unit = UNIT(dev); mode = MODE(dev); dsty = DSTY(dev); - /*******************************************************\ - * Check the unit is legal * - \*******************************************************/ - if ( unit >= NST ) - { - return(ENXIO); + /* + * Check the unit is legal + */ + if (unit >= NST) { + return (ENXIO); } st = st_data[unit]; - /*******************************************************\ - * Make sure the device has been initialised * - \*******************************************************/ + /* + * Make sure the device has been initialised + */ if ((st == NULL) || (!(st->flags & ST_INITIALIZED))) - return(ENXIO); - - /*******************************************************\ - * Only allow one at a time * - \*******************************************************/ - if(st->flags & ST_OPEN) - { - return(ENXIO); + return (ENXIO); + + sc_link = st->sc_link; + SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n" + ,dev, unit, NST)); + /* + * Only allow one at a time + */ + if (st->flags & ST_OPEN) { + return (EBUSY); } - - /*******************************************************\ - * Throw out a dummy instruction to catch 'Unit attention* - * errors (the error handling will invalidate all our * - * device info if we get one, but otherwise, ignore it * - \*******************************************************/ - st_test_ready(unit, SCSI_SILENT); - - /***************************************************************\ - * Check that the device is ready to use (media loaded?) * - * This time take notice of the return result * - \***************************************************************/ - if(errno = (st_test_ready(unit,0))) - { - printf("st%d: not ready\n",unit); - return(errno); + /* + * Throw out a dummy instruction to catch 'Unit attention + * errors (the error handling will invalidate all our + * device info if we get one, but otherwise, ignore it) + */ + scsi_test_unit_ready(sc_link, SCSI_SILENT); + + sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ + /* + * If the mode is 3 (e.g. minor = 3,7,11,15) + * then the device has been openned to set defaults + * This mode does NOT ALLOW I/O, only ioctls + */ + if (mode == CTLMODE) + return 0; + + /* + * Check that the device is ready to use (media loaded?) + * This time take notice of the return result + */ + if (errno = (scsi_test_unit_ready(sc_link, 0))) { + printf("st%d: not ready\n", unit); + st_unmount(unit, NOEJECT); + return (errno); } - - /*******************************************************\ - * Set up the mode flags according to the minor number * - * ensure all open flags are in a known state * - * if it's a different mode, dump all cached parameters * - \*******************************************************/ - if(st->last_dsty != dsty || !(st->flags & ST_INFO_VALID)) - { - st->flags &= ~ST_INFO_VALID; - st->last_dsty = dsty; - st->quirks = st->drive_quirks | st->modes[dsty].quirks; - st->density = st->modes[dsty].density; + /* + * 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(unit, NOEJECT); } - st->flags &= ~ST_PER_OPEN; - -#ifdef STDEBUG - if(scsi_debug & (PRINTROUTINES | TRACEOPENS)) - printf("stopen: dev=0x%x (unit %d (of %d))\n" - , dev, unit, NST); -#endif /*STDEBUG*/ - /***************************************************************\ - * If the media is new, then make sure we give it a chance to * - * to do a 'load' instruction. * - \***************************************************************/ - if(!(st->flags & ST_INFO_VALID)) /* is media new? */ - { - if(errno = st_load(unit,LD_LOAD,0)) - { - return(errno); - } - st_test_ready(unit,0); - if(st->quirks & ST_Q_SNS_HLP) - { - /***********************************************\ - * 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 pretend not to be at beginning of medium * - * to keep st_read from calling st_decide_mode. * - * * - * 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. * - \***********************************************/ - char *buf; - int readsiz; - - buf = malloc(1024,M_TEMP,M_NOWAIT); - if(!buf) return(ENOMEM); - - if (errno = st_mode_sense(unit, 0)) - { - goto bad; - } - st->blksiz = 1024; - do { - switch (st->blksiz) - { - case 512: - case 1024: - readsiz = st->blksiz; - st->flags |= ST_FIXEDBLOCKS; - break; - default: - readsiz = 1; - st->flags &= ~ST_FIXEDBLOCKS; - } - if (errno = st_mode_select(unit, 0)) - { - goto bad; - } - st->flags &= ~ST_AT_BOM; - st_read(unit, buf, readsiz, SCSI_SILENT); - if (errno = st_rewind(unit, FALSE, 0)) - { -bad: free(buf,M_TEMP); - return(errno); - } - } while (readsiz != 1 && readsiz > st->blksiz); - free(buf,M_TEMP); - } - } - - /*******************************************************\ - * Load the physical device parameters * - * loads: blkmin, blkmax * - \*******************************************************/ - if(errno = st_rd_blk_lim(unit,0)) - { - return(errno); - } - - /*******************************************************\ - * Load the media dependent parameters * - * includes: media_blksiz,media_density,numblks * - \*******************************************************/ - if(errno = st_mode_sense(unit,0)) - { - return(errno); - } - - if (!(st->flags & ST_INFO_VALID) && dsty == 0) - { - /*******************************************************\ - * If the user defaulted the density, use the drive's * - * opinion of it. * - \*******************************************************/ - st->quirks = st->drive_quirks; - st->density = st->media_density; - do { - if (st->density == st->modes[dsty].density) - { - st->quirks |= st->modes[dsty].quirks; -#ifdef STDEBUG - if(st_debug) printf("selected density %d\n", dsty); -#endif /*STDEBUG*/ - break; /* only out of the loop*/ - } - } while (++dsty < 4); - /*******************************************************\ - * If dsty got to 4, the drive must have reported a * - * density which isn't in our density list (e.g. QIC-24 * - * for a default drive). We can handle that, except * - * there'd better be no density-specific quirks in the * - * drive's behavior. * - \*******************************************************/ - } - - /***************************************************************\ - * 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. * - \***************************************************************/ - 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: - st->flags &= ~ST_2FM_AT_EOD; - break; - default: - st->flags |= ST_2FM_AT_EOD; + /* + * 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; } - - /***************************************************************\ - * Make sure that a tape opened in write-only mode will have * - * file marks written on it. This is the only way to write a * - * zero-length file on tape. * - \***************************************************************/ + /* + * 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 + */ if ((flags & O_ACCMODE) == FWRITE) st->flags |= ST_WRITTEN; - st->flags |= ST_INFO_VALID; - - st_prevent(unit,PR_PREVENT,0); /* who cares if it fails? */ - -#ifdef STDEBUG - if(scsi_debug & TRACEOPENS) - printf("Params loaded "); -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB2, ("Open complete\n")); st->flags |= ST_OPEN; - return(0); + return (0); } -/*******************************************************\ -* close the device.. only called if we are the LAST * -* occurence of an open device * -\*******************************************************/ +/* + * close the device.. only called if we are the LAST + * occurence of an open device + */ +errval stclose(dev) + dev_t dev; { - unsigned char unit,mode; - struct st_data *st; + unsigned char unit, mode; + struct st_data *st; + struct scsi_link *sc_link; unit = UNIT(dev); mode = MODE(dev); st = st_data[unit]; - -#ifdef STDEBUG - if(scsi_debug & TRACEOPENS) - printf("Closing device"); -#endif /*STDEBUG*/ - switch(mode) - { - case 0: - st_rewind(unit,FALSE,SCSI_SILENT); - st_prevent(unit,PR_ALLOW,SCSI_SILENT); - st->flags &= ~ST_PER_MEDIA; - break; - case 1: /*non rewind*/ - if((st->flags & (ST_WRITTEN | ST_FM_WRITTEN)) == ST_WRITTEN) - st_write_filemarks(unit, 1, 0); + sc_link = st->sc_link; + + SC_DEBUG(sc_link, SDEV_DB1, ("closing\n")); + if ((st->flags & (ST_WRITTEN | ST_FM_WRITTEN)) == ST_WRITTEN) + st_write_filemarks(unit, 1, 0); + switch (mode & 0x3) { + case 0: + case 3: /* for now */ + st_unmount(unit, NOEJECT); break; - case 2: - st_rewind(unit,FALSE,SCSI_SILENT); - st_prevent(unit,PR_ALLOW,SCSI_SILENT); - st_load(unit,LD_UNLOAD,SCSI_SILENT); - st->flags &= ~ST_PER_MEDIA; + case 1: /*leave mounted unless media seems to have been removed */ + if (!(sc_link->flags & SDEV_MEDIA_LOADED)) { + st_unmount(unit, NOEJECT); + } break; - case 3:/* a bit silly really */ - st_prevent(unit,PR_ALLOW,SCSI_SILENT); - st_load(unit,LD_UNLOAD,SCSI_SILENT); - st->flags &= ~ST_PER_MEDIA; + case 2: + st_unmount(unit, EJECT); break; - default: - printf("st%d: close: Bad mode (minor number)%d how's it open?\n" - ,unit,mode); - return(EINVAL); } - st->flags &= ~ST_PER_OPEN; - return(0); + sc_link->flags &= ~SDEV_OPEN; + st->flags &= ~ST_OPEN; + return (0); } -/***************************************************************\ -* Given all we know about the device, media, mode, 'quirks' and * -* initial operation, make a decision as to how we should be set * -* up. First, choose the density, then variable/fixed blocks. * -\***************************************************************/ -st_decide_mode(unit, first_read) -int unit, first_read; +/* + * 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. + */ +errval +st_mount_tape(dev, flags) + dev_t dev; + u_int32 flags; { - int dsty, error; - struct st_data *st = st_data[unit]; + u_int32 unit, mode, dsty; + struct st_data *st; + struct scsi_link *sc_link; + errval errno = 0; - /***************************************************************\ - * First, if our information about the tape is out of date, get * - * new information. * - \***************************************************************/ - if (!(st->flags & ST_INFO_VALID)) - { - if (error = st_mode_sense(unit, 0)) - return (error); - st->flags |= ST_INFO_VALID; + unit = UNIT(dev); + mode = MODE(dev); + dsty = DSTY(dev); + st = st_data[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 (errno = st_load(unit, LD_LOAD, 0)) { + return (errno); } -#ifdef STDEBUG - if(st_debug) printf("starting mode decision\n"); -#endif /*STDEBUG*/ - - /***************************************************************\ - * If the user has already specified fixed or variable-length * - * blocks using an ioctl, just believe him. OVERRIDE ALL * - \***************************************************************/ - if (st->flags & ST_BLOCK_SET) - { -#ifdef STDEBUG - if(st_debug) printf("user has specified %s mode\n", - st->flags & ST_FIXEDBLOCKS ? "fixed" : "variable"); -#endif /*STDEBUG*/ - goto done; + /* + * Throw another dummy instruction to catch + * 'Unit attention' errors. Some drives appear to give + * these after doing a Load instruction. + * (noteably some DAT drives) + */ + scsi_test_unit_ready(sc_link, SCSI_SILENT); + + /* + * 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_SNS_HLP) { + if (errno = st_touch_tape(unit)) + return errno; + } + /* + * Load the physical device parameters + * loads: blkmin, blkmax + */ + if (errno = st_rd_blk_lim(unit, 0)) { + return errno; + } + /* + * Load the media dependent parameters + * includes: media_blksiz,media_density,numblks + * As we have a tape in, it should be reflected here. + * If not you may need the "quirk" above. + */ + if (errno = st_mode_sense(unit, 0)) { + return errno; + } + /* + * 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->blksiz = st->modes[dsty].blksiz; + if (st->blksiz) { + st->flags |= ST_FIXEDBLOCKS; + } + } else { + if (errno = st_decide_mode(unit, FALSE)) { + return errno; + } + } + if (errno = st_mode_select(unit, 0)) { + printf("st%d: Cannot set selected mode", unit); + return errno; } + scsi_prevent(sc_link, PR_PREVENT, 0); /* who cares if it fails? */ + st->flags &= ~ST_NEW_MOUNT; + st->flags |= ST_MOUNTED; + sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ - /***************************************************************\ - * If the user hasn't already specified fixed or variable-length * - * blocks and the block size (zero if variable-length), we'll * - * have to try to figure them out ourselves. * - * * - * Our first shot at a method is, "The quirks made me do it!" * - \***************************************************************/ - switch (st->quirks & (ST_Q_FORCE_FIXED_MODE | ST_Q_FORCE_VAR_MODE)) - { - case (ST_Q_FORCE_FIXED_MODE | ST_Q_FORCE_VAR_MODE): - printf("st%d: bad quirks\n",unit); + 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(int unit, boolean eject) +{ + struct st_data *st = st_data[unit]; + struct scsi_link *sc_link = st->sc_link; + int32 nmarks; + + if (!(st->flags & ST_MOUNTED)) + return; + SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); + st_chkeod(unit, FALSE, &nmarks, SCSI_SILENT); + st_rewind(unit, FALSE, SCSI_SILENT); + scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT); + if (eject) { + st_load(unit, LD_UNLOAD, SCSI_SILENT); + } + 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) + */ +errval +st_decide_mode(unit, first_read) + u_int32 unit; + boolean first_read; +{ + struct st_data *st = st_data[unit]; +#ifdef SCSIDEBUG + struct scsi_link *sc_link = st->sc_link; +#endif + + SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); + + /* + * If the user hasn't already specified fixed or variable-length + * blocks and the block size (zero if variable-length), we'll + * have to try to figure them out ourselves. + * + * Our first shot at a method is, "The quirks made me do it!" + */ + switch ((int)(st->quirks & (ST_Q_FORCE_FIXED_MODE | ST_Q_FORCE_VAR_MODE))) { + case (ST_Q_FORCE_FIXED_MODE | ST_Q_FORCE_VAR_MODE): + printf("st%d: bad quirks\n", unit); return (EINVAL); - case ST_Q_FORCE_FIXED_MODE: + case ST_Q_FORCE_FIXED_MODE: /*specified fixed, but not what size */ st->flags |= ST_FIXEDBLOCKS; if (st->blkmin && (st->blkmin == st->blkmax)) st->blksiz = st->blkmin; - else if(st->media_blksiz > 0) + else if (st->media_blksiz > 0) st->blksiz = st->media_blksiz; else st->blksiz = DEF_FIXED_BSIZE; -#ifdef STDEBUG - if(st_debug) printf("Quirks force fixed mode\n"); -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB3, ("Quirks force fixed mode(%d)\n", + st->blksiz)); goto done; - case ST_Q_FORCE_VAR_MODE: + case ST_Q_FORCE_VAR_MODE: st->flags &= ~ST_FIXEDBLOCKS; st->blksiz = 0; -#ifdef STDEBUG - if(st_debug) printf("Quirks force variable mode\n"); -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB3, ("Quirks force variable mode\n")); goto done; } - - /***************************************************************\ - * 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)) - { + /* + * 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->blksiz = st->blkmin; -#ifdef STDEBUG - if(st_debug) printf("blkmin == blkmax of %d\n",st->blkmin); -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB3, + ("blkmin == blkmax of %d\n", st->blkmin)); goto done; } - - /***************************************************************\ - * If the tape density mandates use of fixed or variable-length * - * blocks, comply. * - \***************************************************************/ - switch (st->density) - { - case HALFINCH_800: - case HALFINCH_1600: - case HALFINCH_6250: - case DDS: + /* + * If the tape density mandates (or even suggests) use of fixed + * or variable-length blocks, comply. + */ + switch ((int)st->density) { + case HALFINCH_800: + case HALFINCH_1600: + case HALFINCH_6250: + case DDS: st->flags &= ~ST_FIXEDBLOCKS; st->blksiz = 0; -#ifdef STDEBUG - if(st_debug) printf("density specified variable\n"); -#endif /*STDEBUG*/ + 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_11: + case QIC_24: + case QIC_120: + case QIC_150: + case QIC_525: + case QIC_1320: st->flags |= ST_FIXEDBLOCKS; - if (st->media_blksiz > 0) + if (st->media_blksiz > 0) { st->blksiz = st->media_blksiz; - else + } else { st->blksiz = DEF_FIXED_BSIZE; -#ifdef STDEBUG - if(st_debug) printf("density specified fixed\n"); -#endif /*STDEBUG*/ + } + 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_BLKSIZ) || st->media_blksiz == 0 - || st->media_blksiz == DEF_FIXED_BSIZE || st->media_blksiz == 1024)) - { - if (st->media_blksiz == 0) + /* + * 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_BLKSIZ) + || (st->media_blksiz == 0) + || (st->media_blksiz == DEF_FIXED_BSIZE) + || (st->media_blksiz == 1024))) { + if (st->media_blksiz == 0) { st->flags &= ~ST_FIXEDBLOCKS; - else + } else { st->flags |= ST_FIXEDBLOCKS; + } st->blksiz = st->media_blksiz; -#ifdef STDEBUG - if(st_debug) printf("Used media_blksiz of %d\n",st->media_blksiz); -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB3, + ("Used media_blksiz of %d\n", st->media_blksiz)); goto done; } - - /***************************************************************\ - * We're getting no hints from any direction. Choose variable- * - * length blocks arbitrarily. * - \***************************************************************/ + /* + * We're getting no hints from any direction. Choose variable- + * length blocks arbitrarily. + */ st->flags &= ~ST_FIXEDBLOCKS; st->blksiz = 0; -#ifdef STDEBUG - if(st_debug) printf("Give up and default to variable mode\n"); -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB3, ("Give up and default to variable mode\n")); done: - st->flags &= ~ST_AT_BOM; - return (st_mode_select(unit, 0)); + + /* + * 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 ((int)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: + st->flags &= ~ST_2FM_AT_EOD; + break; + default: + st->flags |= ST_2FM_AT_EOD; + } + return 0; } -/*******************************************************\ -* trim the size of the transfer if needed, * -* called by physio * -* basically the smaller of our min and the scsi driver's* -* minphys * -\*******************************************************/ -void stminphys(bp) -struct buf *bp; +/* + * trim the size of the transfer if needed, + * called by physio + * basically the smaller of our min and the scsi driver's + * minphys + */ +void +stminphys(bp) + struct buf *bp; { - (*(st_data[UNIT(bp->b_dev)]->sc_sw->scsi_minphys))(bp); + (*(st_data[UNIT(bp->b_dev)]->sc_link->adapter->scsi_minphys)) (bp); } -/*******************************************************\ -* 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. * -\*******************************************************/ - -int ststrategy(bp) -struct buf *bp; +/* + * 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 buf **dp; + struct buf **dp; unsigned char unit; - unsigned int opri; + u_int32 opri; struct st_data *st; ststrats++; unit = UNIT((bp->b_dev)); st = st_data[unit]; -#ifdef STDEBUG - if(scsi_debug & PRINTROUTINES) printf("\nststrategy "); - if(scsi_debug & SHOWREQUESTS) printf("st%d: %d bytes @ blk%d\n", - unit,bp->b_bcount,bp->b_blkno); -#endif /*STDEBUG*/ - /*******************************************************\ - * If it's a null transfer, return immediatly * - \*******************************************************/ - if (bp->b_bcount == 0) - { + SC_DEBUG(st->sc_link, SDEV_DB1, + (" strategy: %d 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 we're at beginning of medium, now is the time to * - * set medium access density, fixed or variable-blocks * - * and, if fixed, the block size. * - \*******************************************************/ - if (st->flags & ST_AT_BOM && - (bp->b_error = st_decide_mode(unit, (bp->b_flags & B_READ) != 0))) - goto bad; - - /*******************************************************\ - * Odd sized request on fixed drives are verboten * - \*******************************************************/ - if(st->flags & ST_FIXEDBLOCKS) - { - if(bp->b_bcount % st->blksiz) - { + /* + * Odd sized request on fixed drives are verboten + */ + if (st->flags & ST_FIXEDBLOCKS) { + if (bp->b_bcount % st->blksiz) { printf("st%d: bad request, must be multiple of %d\n", - unit, st->blksiz); + unit, st->blksiz); bp->b_error = EIO; goto bad; } } - /*******************************************************\ - * as are out-of-range requests on variable drives. * - \*******************************************************/ - else if(bp->b_bcount < st->blkmin || bp->b_bcount > st->blkmax) - { + /* + * as are out-of-range requests on variable drives. + */ + else if (bp->b_bcount < st->blkmin || bp->b_bcount > st->blkmax) { printf("st%d: bad request, must be between %d and %d\n", - unit, st->blkmin, st->blkmax); + unit, st->blkmin, st->blkmax); bp->b_error = EIO; goto bad; } - stminphys(bp); opri = 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() )) * - \*******************************************************/ + /* + * 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() )) + */ dp = &(st->buf_queue); - while (*dp) - { + while (*dp) { dp = &((*dp)->b_actf); - } + } *dp = bp; bp->b_actf = NULL; - /*******************************************************\ - * 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..) * - \*******************************************************/ + /* + * 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(unit); splx(opri); @@ -928,1443 +935,994 @@ struct buf *bp; bad: bp->b_flags |= B_ERROR; done: - /*******************************************************\ - * Correctly set the buf to indicate a completed xfer * - \*******************************************************/ + /* + * Correctly set the buf to indicate a completed xfer + */ iodone(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 scsi_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(unit) + u_int32 unit; +{ + struct st_data *st = st_data[unit]; + struct scsi_link *sc_link = st->sc_link; + register struct buf *bp = 0; + struct scsi_rw_tape cmd; + u_int32 flags; + + 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->opennings != 0) { + + /* 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 = st->buf_queue) == NULL) { + return; /* no work to bother with */ + } + st->buf_queue = bp->b_actf; + + /* + * if the device has been unmounted byt 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; + goto badnews; + } + /* + * only FIXEDBLOCK devices have pending 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(unit, 0, SP_FILEMARKS, 0) != + ESUCCESS) + goto badnews; + } 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 EIO (e.g. EOM) but have not reported it + * yet then we should report it now + */ + if (st->flags & ST_EIO_PENDING) { + bp->b_resid = bp->b_bcount; + bp->b_error = EIO; + bp->b_flags |= B_ERROR; + st->flags &= ~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.op_code = WRITE_COMMAND_TAPE; + st->flags &= ~ST_FM_WRITTEN; + st->flags |= ST_WRITTEN; + flags = SCSI_DATA_OUT; + } else { + cmd.op_code = READ_COMMAND_TAPE; + flags = SCSI_DATA_IN; + } + /* + * Handle "fixed-block-mode" tape drives by using the + * block count instead of the length. + */ + if (st->flags & ST_FIXEDBLOCKS) { + cmd.byte2 |= SRWT_FIXED; + lto3b(bp->b_bcount / st->blksiz, cmd.len); + } else { + lto3b(bp->b_bcount, cmd.len); + } + /* + * go ask the adapter to do all this for us + */ + if (scsi_scsi_cmd(sc_link, + (struct scsi_generic *) &cmd, + sizeof(cmd), + (u_char *) bp->b_un.b_addr, + bp->b_bcount, + 0, /* can't retry a read on a tape really */ + 100000, + bp, + flags | SCSI_NOSLEEP) == SUCCESSFULLY_QUEUED) { + stqueues++; + } else { +badnews: + printf("st%d: oops not queued\n", unit); + bp->b_flags |= B_ERROR; + bp->b_error = EIO; + biodone(bp); + } + } /* go back and see if we can cram more work in.. */ +} - -/*******************************************************\ -* Perform special action on behalf of the user * -* Knows about the internals of this device * -\*******************************************************/ -stioctl(dev, cmd, arg, mode) -dev_t dev; -int cmd; -caddr_t arg; +/* + * Perform special action on behalf of the user; + * knows about the internals of this device + */ +errval +stioctl(dev, cmd, arg, flag) + dev_t dev; + int cmd; + caddr_t arg; + int flag; { - int errcode = 0; + errval errcode = 0; unsigned char unit; - int number,flags,dsty; - struct st_data *st; - - - /*******************************************************\ - * Find the device that the user is talking about * - \*******************************************************/ - flags = 0; /* give error messages, act on errors etc. */ + u_int32 number, flags, dsty; + struct st_data *st; + u_int32 hold_blksiz; + u_int32 hold_density; + int32 nmarks; + 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 = UNIT(dev); dsty = DSTY(dev); - st = st_data[unit]; + st = st_data[unit]; + hold_blksiz = st->blksiz; + hold_density = st->density; - switch(cmd) - { + switch (cmd) { case MTIOCGET: - { - struct mtget *g = (struct mtget *) arg; - - bzero(g, sizeof(struct mtget)); - g->mt_type = 0x7; /* Ultrix compat */ /*?*/ - if (st->flags & ST_FIXEDBLOCKS) { - g->mt_bsiz = st->blksiz; - } else { - g->mt_bsiz = 0; - } - g->mt_dns_dflt = st->modes[0].density; - g->mt_dns_dsty1 = st->modes[DSTY1].density; - g->mt_dns_dsty2 = st->modes[DSTY2].density; - g->mt_dns_dsty3 = st->modes[DSTY3].density; - break; - } - - + { + struct mtget *g = (struct mtget *) arg; + + SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); + bzero(g, sizeof(struct mtget)); + g->mt_type = 0x7; /* Ultrix compat *//*? */ + g->mt_density = st->density; + g->mt_blksiz = st->blksiz; + g->mt_density0 = st->modes[0].density; + g->mt_density1 = st->modes[1].density; + g->mt_density2 = st->modes[2].density; + g->mt_density3 = st->modes[3].density; + g->mt_blksiz0 = st->modes[0].blksiz; + g->mt_blksiz1 = st->modes[1].blksiz; + g->mt_blksiz2 = st->modes[2].blksiz; + g->mt_blksiz3 = st->modes[3].blksiz; + break; + } case MTIOCTOP: - { - int nmarks; - struct mtop *mt = (struct mtop *) arg; - -#ifdef STDEBUG - if (st_debug) - printf("[sctape_sstatus: %x %x]\n", - mt->mt_op, mt->mt_count); -#endif /*STDEBUG*/ - + { + 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 */ - errcode = st_write_filemarks(unit,number,flags); - break; - case MTBSF: /* backward space file */ - number = -number; - case MTFSF: /* forward space file */ - errcode = st_chkeod(unit, FALSE, &nmarks, flags); - if (errcode == ESUCCESS) - errcode = st_space(unit, number - nmarks, - SP_FILEMARKS, flags); - break; - case MTBSR: /* backward space record */ - number = -number; - case MTFSR: /* forward space record */ - errcode = st_chkeod(unit, TRUE, &nmarks, flags); - if (errcode == ESUCCESS) - errcode = st_space(unit,number,SP_BLKS,flags); - break; - case MTREW: /* rewind */ - errcode = st_rewind(unit,FALSE,flags); - break; - case MTOFFL: /* rewind and put the drive offline */ - if(st_rewind(unit,FALSE,flags)) - { - printf("st%d: rewind failed, unit still loaded\n", - unit); - } - else - { - st_prevent(unit,PR_ALLOW,0); - st_load(unit,LD_UNLOAD,flags); - } - break; - case MTNOP: /* no operation, sets status only */ - case MTCACHE: /* enable controller cache */ - case MTNOCACHE: /* disable controller cache */ - break; - case MTSETBSIZ: /* Set block size for device */ - if (!(st->flags & ST_AT_BOM)) - { - errcode = EINVAL; + /* 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 */ + errcode = st_write_filemarks(unit, number, flags); break; - } - if (number == 0) - { - st->flags &= ~ST_FIXEDBLOCKS; - } - else - { - if ((st->blkmin || st->blkmax) /* they exist */ - && ((number < st->blkmin - || number > st->blkmax))) - { + case MTBSF: /* backward space file */ + number = -number; + case MTFSF: /* forward space file */ + errcode = st_chkeod(unit, FALSE, &nmarks, flags); + if (errcode == ESUCCESS) + errcode = st_space(unit, number - nmarks, + SP_FILEMARKS, flags); + break; + case MTBSR: /* backward space record */ + number = -number; + case MTFSR: /* forward space record */ + errcode = st_chkeod(unit, TRUE, &nmarks, flags); + if (errcode == ESUCCESS) + errcode = st_space(unit, number, SP_BLKS, flags); + break; + case MTREW: /* rewind */ + errcode = st_rewind(unit, FALSE, flags); + break; + case MTOFFL: /* rewind and put the drive offline */ + st_unmount(unit, EJECT); + break; + case MTNOP: /* no operation, sets status only */ + case MTCACHE: /* enable controller cache */ + case MTNOCACHE: /* disable controller cache */ + break; + case MTSETBSIZ: /* Set block size for device */ +#ifdef NOTYET + if (!(st->flags & ST_NEW_MOUNT)) { + uprintf("re-mount tape before changing blocksize"); errcode = EINVAL; break; } - st->flags |= ST_FIXEDBLOCKS; - } - st->blksiz = number; - st->flags |= ST_BLOCK_SET; - break; +#endif + if (number == 0) { + st->flags &= ~ST_FIXEDBLOCKS; + } else { + if ((st->blkmin || st->blkmax) /* they exist */ + &&((number < st->blkmin + || number > st->blkmax))) { + errcode = EINVAL; + break; + } + st->flags |= ST_FIXEDBLOCKS; + } + st->blksiz = number; + st->flags |= ST_BLOCK_SET; /*XXX */ + goto try_new_value; - /* How do we check that the drive can handle - the requested density ? */ + case MTSETDNSTY: /* Set density for device and mode */ + if (number > SCSI_2_MAX_DENSITY_CODE) { + errcode = EINVAL; + } else { + st->density = number; + } + goto try_new_value; - case MTSETDNSTY: /* Set density for device and mode */ - if (number < 0 || number > SCSI_2_MAX_DENSITY_CODE) - { + default: errcode = EINVAL; } - else - { - st->modes[dsty].density = number; - } break; - - default: - errcode = EINVAL; } - break; - } case MTIOCIEOT: case MTIOCEEOT: break; default: - errcode = EINVAL; + if(MODE(dev) == CTLMODE) + errcode = scsi_do_ioctl(st->sc_link,cmd,arg,flag); + else + errcode = ENOTTY; + break; } - return errcode; +/*-----------------------------*/ +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 (errcode = st_mode_select(unit, 0)) { /* put it back as it was */ + printf("st%d: Cannot set selected mode", unit); + st->density = hold_density; + st->blksiz = hold_blksiz; + if (st->blksiz) { + st->flags |= ST_FIXEDBLOCKS; + } else { + st->flags &= ~ST_FIXEDBLOCKS; + } + return (errcode); + } + /* + * 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 + */ + if (MODE(dev) == 0x03) { + /* special mode */ + /* XXX */ + switch ((short) (mt->mt_op)) { + case MTSETBSIZ: + st->modes[dsty].blksiz = st->blksiz; + 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(unit, buf, size, flags) -int unit, size, flags; -char *buf; +/* + * Do a synchronous read. + */ +errval +st_read(unit, buf, size, flags) + u_int32 unit, size, flags; + char *buf; { - int error; struct scsi_rw_tape scsi_cmd; struct st_data *st = st_data[unit]; - /*******************************************************\ - * If it's a null transfer, return immediatly * - \*******************************************************/ - if (size == 0) - { - return(ESUCCESS); + /* + * If it's a null transfer, return immediatly + */ + if (size == 0) { + return (ESUCCESS); } - - /*******************************************************\ - * If we're at beginning of medium, now is the time to * - * set medium access density, fixed or variable-blocks * - * and, if fixed, the block size. * - \*******************************************************/ - if (st->flags & ST_AT_BOM && (error = st_decide_mode(unit, TRUE))) - return (error); - bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = READ_COMMAND_TAPE; - scsi_cmd.byte2 |= st->flags & ST_FIXEDBLOCKS ? SRWT_FIXED : 0; - lto3b(scsi_cmd.byte2 & SRWT_FIXED ? - size / (st->blksiz ? st->blksiz : DEF_FIXED_BSIZE) : size, - scsi_cmd.len); - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - buf, - size, - 100000, - NULL, - flags | SCSI_DATA_IN)); -} - -/*******************************************************\ -* Get scsi driver to send a "are you ready" command * -\*******************************************************/ -st_test_ready(unit,flags) -int unit,flags; -{ - struct scsi_test_unit_ready scsi_cmd; - - bzero(&scsi_cmd, sizeof(scsi_cmd)); - scsi_cmd.op_code = TEST_UNIT_READY; - - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - 0, - 0, - 100000, - NULL, - flags)); + if (st->flags & ST_FIXEDBLOCKS) { + scsi_cmd.byte2 |= SRWT_FIXED; + lto3b(size / (st->blksiz ? st->blksiz : DEF_FIXED_BSIZE), + scsi_cmd.len); + } else { + lto3b(size, scsi_cmd.len); + } + return (scsi_scsi_cmd(st->sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + (u_char *) buf, + size, + 0, /* not on io commands */ + 100000, + NULL, + flags | SCSI_DATA_IN)); } - - #ifdef __STDC__ #define b2tol(a) (((unsigned)(a##_1) << 8) + (unsigned)a##_0 ) #else #define b2tol(a) (((unsigned)(a/**/_1) << 8) + (unsigned)a/**/_0 ) #endif -/*******************************************************\ -* Ask the drive what it's min and max blk sizes are. * -\*******************************************************/ +/* + * Ask the drive what it's min and max blk sizes are. + */ +errval st_rd_blk_lim(unit, flags) -int unit,flags; + u_int32 unit, flags; { - struct scsi_blk_limits scsi_cmd; + struct scsi_blk_limits scsi_cmd; struct scsi_blk_limits_data scsi_blkl; struct st_data *st = st_data[unit]; - int errno; - - /*******************************************************\ - * First check if we have it all loaded * - \*******************************************************/ - if ((st->flags & ST_INFO_VALID)) return 0; - - /*******************************************************\ - * do a 'Read Block Limits' * - \*******************************************************/ + errval errno; + struct scsi_link *sc_link = st->sc_link; + + /* + * First check if we have it all loaded + */ + if ((sc_link->flags & SDEV_MEDIA_LOADED)) + return 0; + + /* + * do a 'Read Block Limits' + */ bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = READ_BLK_LIMITS; - /*******************************************************\ - * do the command, update the global values * - \*******************************************************/ - if ( errno = st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - &scsi_blkl, - sizeof(scsi_blkl), - 5000, - NULL, - flags | SCSI_DATA_IN)) - { + /* + * do the command, update the global values + */ + if (errno = scsi_scsi_cmd(sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + (u_char *) & scsi_blkl, + sizeof(scsi_blkl), + ST_RETRIES, + 5000, + NULL, + flags | SCSI_DATA_IN)) { return errno; - } + } st->blkmin = b2tol(scsi_blkl.min_length); st->blkmax = _3btol(&scsi_blkl.max_length_2); -#ifdef STDEBUG - if (st_debug) - { - printf("(%d <= blksiz <= %d)\n", st->blkmin, st->blkmax); - } -#endif /*STDEBUG*/ + SC_DEBUG(sc_link, SDEV_DB3, + ("(%d <= blksiz <= %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) * -\*******************************************************/ +/* + * 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) + */ +errval st_mode_sense(unit, flags) -int unit,flags; + u_int32 unit, flags; { - int scsi_sense_len; - int errno; - char *scsi_sense_ptr; - struct scsi_mode_sense scsi_cmd; - struct scsi_sense - { - struct scsi_mode_header header; - struct blk_desc blk_desc; - }scsi_sense; + u_int32 scsi_sense_len; + errval errno; + char *scsi_sense_ptr; + struct scsi_mode_sense scsi_cmd; + struct scsi_sense { + struct scsi_mode_header header; + struct blk_desc blk_desc; + } scsi_sense; + + struct scsi_sense_page_0 { + struct scsi_mode_header header; + struct blk_desc blk_desc; + unsigned char sense_data[PAGE_0_SENSE_DATA_SIZE]; + /* Tandberg tape drives returns page 00 + * with the sense data, whether or not + * you want it( ie the don't like you + * saying you want anything less!!!!! + * They also expect page 00 + * back when you issue a mode select + */ + } scsi_sense_page_0; + struct st_data *st = st_data[unit]; + struct scsi_link *sc_link = st->sc_link; - struct scsi_sense_page_0 - { - struct scsi_mode_header header; - struct blk_desc blk_desc; - unsigned char sense_data[PAGE_0_SENSE_DATA_SIZE]; - /* Tandberg tape drives returns page 00 */ - /* with the sense data, whether or not */ - /* you want it( ie the don't like you */ - /* saying you want anything less!!!!! */ - /* They also expect page 00 */ - /* back when you issue a mode select */ - }scsi_sense_page_0; - struct st_data *st = st_data[unit]; - - /*******************************************************\ - * First check if we have it all loaded * - \*******************************************************/ - if ((st->flags & ST_INFO_VALID)) return 0; - - /*******************************************************\ - * Define what sort of structure we're working with * - \*******************************************************/ - if (st->quirks & ST_Q_NEEDS_PAGE_0) - { + /* + * Define what sort of structure we're working with + */ + if (st->quirks & ST_Q_NEEDS_PAGE_0) { scsi_sense_len = sizeof(scsi_sense_page_0); scsi_sense_ptr = (char *) &scsi_sense_page_0; - } - else - { + } else { scsi_sense_len = sizeof(scsi_sense); scsi_sense_ptr = (char *) &scsi_sense; } - - /*******************************************************\ - * Set up a mode sense * - \*******************************************************/ + /* + * Set up a mode sense + */ bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = MODE_SENSE; scsi_cmd.length = scsi_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. * - \*******************************************************/ - if (errno = st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - scsi_sense_ptr, - scsi_sense_len, - 5000, - NULL, - flags | SCSI_DATA_IN) ) - { + /* + * 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. + */ + if (errno = scsi_scsi_cmd(sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + (u_char *) scsi_sense_ptr, + scsi_sense_len, + ST_RETRIES, + 5000, + NULL, + flags | SCSI_DATA_IN)) { return errno; - } - st->numblks = _3btol(&(((struct scsi_sense *)scsi_sense_ptr)->blk_desc.nblocks)); - st->media_blksiz = _3btol(&(((struct scsi_sense *)scsi_sense_ptr)->blk_desc.blklen)); - st->media_density = ((struct scsi_sense *)scsi_sense_ptr)->blk_desc.density; - if (((struct scsi_sense *)scsi_sense_ptr)->header.dev_spec & - SMH_DSP_WRITE_PROT) + } + st->numblks = _3btol(((struct scsi_sense *)scsi_sense_ptr)->blk_desc.nblocks); + st->media_blksiz = _3btol(((struct scsi_sense *)scsi_sense_ptr)->blk_desc.blklen); + st->media_density = ((struct scsi_sense *) scsi_sense_ptr)->blk_desc.density; + if (((struct scsi_sense *) scsi_sense_ptr)->header.dev_spec & + SMH_DSP_WRITE_PROT) { st->flags |= ST_READONLY; -#ifdef STDEBUG - if (st_debug) - { - printf("st%d: density code 0x%x, %d-byte blocks, write-%s, ", - unit, st->media_density, st->media_blksiz, - st->flags & ST_READONLY ? "protected" : "enabled"); - printf("%sbuffered\n", - ((struct scsi_sense *)scsi_sense_ptr)->header.dev_spec - & SMH_DSP_BUFF_MODE ? "" : "un"); } -#endif /*STDEBUG*/ - if (st->quirks & ST_Q_NEEDS_PAGE_0) - { - bcopy(((struct scsi_sense_page_0 *)scsi_sense_ptr)->sense_data, - st->sense_data, - sizeof(((struct scsi_sense_page_0 *)scsi_sense_ptr)->sense_data)); + SC_DEBUG(sc_link, SDEV_DB3, + ("density code 0x%x, %d-byte blocks, write-%s, ", + st->media_density, st->media_blksiz, + st->flags & ST_READONLY ? "protected" : "enabled")); + SC_DEBUG(sc_link, SDEV_DB3, + ("%sbuffered\n", + ((struct scsi_sense *) scsi_sense_ptr)->header.dev_spec + & SMH_DSP_BUFF_MODE ? "" : "un")); + if (st->quirks & ST_Q_NEEDS_PAGE_0) { + bcopy(((struct scsi_sense_page_0 *) scsi_sense_ptr)->sense_data, + st->sense_data, + sizeof(((struct scsi_sense_page_0 *) scsi_sense_ptr)->sense_data)); } + 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. * -\*******************************************************/ +/* + * Send a filled out parameter structure to the drive to + * set it into the desire modes etc. + */ +errval st_mode_select(unit, flags) -int unit, flags; + u_int32 unit, flags; { - int dat_len; - char *dat_ptr; + u_int32 dat_len; + char *dat_ptr; struct scsi_mode_select scsi_cmd; - struct dat - { - struct scsi_mode_header header; - struct blk_desc blk_desc; - }dat; - struct dat_page_0 - { - struct scsi_mode_header header; - struct blk_desc blk_desc; - unsigned char sense_data[PAGE_0_SENSE_DATA_SIZE]; - }dat_page_0; - struct st_data *st = st_data[unit]; - - /*******************************************************\ - * Define what sort of structure we're working with * - \*******************************************************/ - if (st->quirks & ST_Q_NEEDS_PAGE_0) - { + struct dat { + struct scsi_mode_header header; + struct blk_desc blk_desc; + } dat; + struct dat_page_0 { + struct scsi_mode_header header; + struct blk_desc blk_desc; + unsigned char sense_data[PAGE_0_SENSE_DATA_SIZE]; + } dat_page_0; + struct st_data *st = st_data[unit]; + + /* + * Define what sort of structure we're working with + */ + if (st->quirks & ST_Q_NEEDS_PAGE_0) { dat_len = sizeof(dat_page_0); dat_ptr = (char *) &dat_page_0; - } - else - { + } else { dat_len = sizeof(dat); dat_ptr = (char *) &dat; } - - /*******************************************************\ - * Set up for a mode select * - \*******************************************************/ + /* + * Set up for a mode select + */ bzero(dat_ptr, dat_len); bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = MODE_SELECT; scsi_cmd.length = dat_len; - ((struct dat *)dat_ptr)->header.blk_desc_len = sizeof(struct blk_desc); - ((struct dat *)dat_ptr)->header.dev_spec |= SMH_DSP_BUFF_MODE_ON; - ((struct dat *)dat_ptr)->blk_desc.density = st->density; - if(st->flags & ST_FIXEDBLOCKS) - { - lto3b( st->blksiz , ((struct dat *)dat_ptr)->blk_desc.blklen); + ((struct dat *) dat_ptr)->header.blk_desc_len = sizeof(struct blk_desc); + ((struct dat *) dat_ptr)->header.dev_spec |= SMH_DSP_BUFF_MODE_ON; + ((struct dat *) dat_ptr)->blk_desc.density = st->density; + if (st->flags & ST_FIXEDBLOCKS) { + lto3b(st->blksiz, ((struct dat *) dat_ptr)->blk_desc.blklen); } - if (st->quirks & ST_Q_NEEDS_PAGE_0) - { - bcopy(st->sense_data, ((struct dat_page_0 *)dat_ptr)->sense_data, - sizeof(((struct dat_page_0 *)dat_ptr)->sense_data)); - /* the Tandberg tapes need the block size to */ - /* be set on each mode sense/select. */ + if (st->quirks & ST_Q_NEEDS_PAGE_0) { + bcopy(st->sense_data, ((struct dat_page_0 *) dat_ptr)->sense_data, + sizeof(((struct dat_page_0 *) dat_ptr)->sense_data)); + /* the Tandberg tapes need the block size to */ + /* be set on each mode sense/select. */ } - /*******************************************************\ - * do the command * - \*******************************************************/ - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - dat_ptr, - dat_len, - 5000, - NULL, - flags | SCSI_DATA_OUT) ); + /* + * do the command + */ + return (scsi_scsi_cmd(st->sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + (u_char *) dat_ptr, + dat_len, + ST_RETRIES, + 5000, + NULL, + flags | SCSI_DATA_OUT)); } -/*******************************************************\ -* skip N blocks/filemarks/seq filemarks/eom * -\*******************************************************/ -st_space(unit,number,what,flags) -int unit,number,what,flags; +/* + * skip N blocks/filemarks/seq filemarks/eom + */ +errval +st_space(unit, number, what, flags) + u_int32 unit, what, flags; + int32 number; { - int error; + errval error; struct scsi_space scsi_cmd; - struct st_data *st = st_data[unit]; - - /*******************************************************\ - * If we're at beginning of medium, now is the time to * - * set medium access density, fixed or variable-blocks * - * and, if fixed, the block size. * - \*******************************************************/ - if (st->flags & ST_AT_BOM && - (error = st_decide_mode(unit, TRUE))) - return (error); + struct st_data *st = st_data[unit]; - switch (what) - { - case SP_BLKS: - if (st->flags & ST_PER_ACTION) - { - if (number > 0) - { + switch ((int)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. * - \*******************************/ + 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(unit, 0, SP_FILEMARKS, flags); - if (error) return(error); + if (error) + return (error); } - if (st->flags & ST_BLANK_READ) - { + if (st->flags & ST_BLANK_READ) { st->flags &= ~ST_BLANK_READ; - return(EIO); + return (EIO); } st->flags &= ~ST_EIO_PENDING; } } break; - case SP_FILEMARKS: - if (st->flags & ST_EIO_PENDING) - { - if (number > 0) - { + case SP_FILEMARKS: + if (st->flags & ST_EIO_PENDING) { + if (number > 0) { /* pretend we just discover the error */ st->flags &= ~ST_EIO_PENDING; - return(EIO); - } - else if (number < 0) + return (EIO); + } else if (number < 0) { /* back away from the error */ st->flags &= ~ST_EIO_PENDING; + } } - if (st->flags & ST_AT_FILEMARK) - { + if (st->flags & ST_AT_FILEMARK) { st->flags &= ~ST_AT_FILEMARK; number--; } - if (st->flags & ST_BLANK_READ && number < 0) - { + if ((st->flags & ST_BLANK_READ) && (number < 0)) { /* back away from unwritten tape */ st->flags &= ~ST_BLANK_READ; - number++; + number++; /* dubious */ } } - if (number == 0) - return(ESUCCESS); + if (number == 0) { + return (ESUCCESS); + } bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = SPACE; scsi_cmd.byte2 = what & SS_CODE; - lto3b(number,scsi_cmd.number); - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - 0, - 0, - 600000, /* 10 mins enough? */ - NULL, - flags)); + lto3b(number, scsi_cmd.number); + return (scsi_scsi_cmd(st->sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + 0, + 0, + 0, /* no retries please , just fail */ + 600000, /* 10 mins enough? */ + NULL, + flags)); } -/*******************************************************\ -* write N filemarks * -\*******************************************************/ -st_write_filemarks(unit,number,flags) -int unit,number,flags; + +/* + * write N filemarks + */ +errval +st_write_filemarks(unit, number, flags) + u_int32 unit, flags; + int32 number; { - int error; struct scsi_write_filemarks scsi_cmd; - struct st_data *st = st_data[unit]; - - /*******************************************************\ - * It's hard to write a negative number of file marks. * - * Don't try. * - \*******************************************************/ - if (number < 0) - return (EINVAL); - - /*******************************************************\ - * If we're at beginning of medium, now is the time to * - * set medium access density, fixed or variable-blocks * - * and, if fixed, the block size. * - \*******************************************************/ - if (st->flags & ST_AT_BOM && number > 0 && - (error = st_decide_mode(unit, FALSE))) - return (error); + struct st_data *st = st_data[unit]; - switch (number) - { - case 0: /* really a command to sync the drive's buffers */ + /* + * It's hard to write a negative number of file marks. + * Don't try. + */ + if (number < 0) { + return EINVAL; + } + switch ((int)number) { + case 0: /* really a command to sync the drive's buffers */ break; - case 1: - if (st->flags & ST_FM_WRITTEN) + case 1: + if (st->flags & ST_FM_WRITTEN) { /* already have one down */ st->flags &= ~ST_WRITTEN; - else + } else { st->flags |= ST_FM_WRITTEN; + } st->flags &= ~ST_PER_ACTION; break; default: st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); } - bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = WRITE_FILEMARKS; - lto3b(number,scsi_cmd.number); - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - 0, - 0, - 100000, /* 10 secs.. (may need to repos head )*/ - NULL, - flags) ); + lto3b(number, scsi_cmd.number); + return scsi_scsi_cmd(st->sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + 0, + 0, + 0, /* no retries, just fail */ + 100000, /* 10 secs.. (may need to repos head ) */ + 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. * -\***************************************************************/ +/* + * 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. + */ +int32 st_chkeod(unit, position, nmarks, flags) -int unit; -int position; -int *nmarks; -int flags; + u_int32 unit; + boolean position; + int32 *nmarks; + u_int32 flags; { - int error; - struct st_data *st = st_data[unit]; + errval error; + struct st_data *st = st_data[unit]; - switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) - { + switch ((int)(st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD))) { default: *nmarks = 0; - return(ESUCCESS); - case ST_WRITTEN: - case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: + return (ESUCCESS); + case ST_WRITTEN: + case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: *nmarks = 1; break; - case ST_WRITTEN | ST_2FM_AT_EOD: + case ST_WRITTEN | ST_2FM_AT_EOD: *nmarks = 2; } error = st_write_filemarks(unit, *nmarks, flags); - if (position && error == ESUCCESS) + if (position && (error == ESUCCESS)) error = st_space(unit, -*nmarks, SP_FILEMARKS, flags); return (error); } -/*******************************************************\ -* load/unload (with retension if true) * -\*******************************************************/ -st_load(unit,type,flags) -int unit,type,flags; +/* + * load/unload (with retension if true) + */ +errval +st_load(unit, type, flags) + u_int32 unit, type, flags; { - struct scsi_load scsi_cmd; - struct st_data *st = st_data[unit]; + struct scsi_load scsi_cmd; + struct st_data *st = st_data[unit]; + struct scsi_link *sc_link = st->sc_link; - st->flags &= ~ST_PER_MEDIA; bzero(&scsi_cmd, sizeof(scsi_cmd)); - if (type == LD_LOAD) - { - /*scsi_cmd.how |= LD_RETEN;*/ - st->flags |= ST_AT_BOM; - } - else - { - int error, nmarks; + if (type != LD_LOAD) { + errval error; + int32 nmarks; error = st_chkeod(unit, FALSE, &nmarks, flags); - if (error != ESUCCESS) return(error); - st->flags &= ~ST_INFO_VALID; + if (error != ESUCCESS) + return (error); + sc_link->flags &= ~SDEV_MEDIA_LOADED; } - if(st->quirks & ST_Q_IGNORE_LOADS) return(0); + if (st->quirks & ST_Q_IGNORE_LOADS) + return (0); scsi_cmd.op_code = LOAD_UNLOAD; scsi_cmd.how |= type; - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - 0, - 0, - 300000, /* 5 min */ - NULL, - flags)); + return (scsi_scsi_cmd(st->sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + 0, + 0, + ST_RETRIES, + 300000, /* 5 min */ + NULL, + flags)); } -/*******************************************************\ -* Prevent or allow the user to remove the tape * -\*******************************************************/ -st_prevent(unit,type,flags) -int unit,type,flags; -{ - struct scsi_prevent scsi_cmd; - if (type == PR_ALLOW) - { - int error, nmarks; - - error = st_chkeod(unit, TRUE, &nmarks, flags); - if (error != ESUCCESS) return(error); - st_data[unit]->flags &= ~ST_INFO_VALID; - } - bzero(&scsi_cmd, sizeof(scsi_cmd)); - scsi_cmd.op_code = PREVENT_ALLOW; - scsi_cmd.how=type; - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - 0, - 0, - 5000, - NULL, - flags)); -} -/*******************************************************\ -* Rewind the device * -\*******************************************************/ -st_rewind(unit,immed,flags) -int unit,immed,flags; +/* + * Rewind the device + */ +errval +st_rewind(unit, immed, flags) + u_int32 unit, flags; + boolean immed; { - struct scsi_rewind scsi_cmd; - struct st_data *st = st_data[unit]; - int error, nmarks; + struct scsi_rewind scsi_cmd; + struct st_data *st = st_data[unit]; + errval error; + int32 nmarks; error = st_chkeod(unit, FALSE, &nmarks, flags); - if (error != ESUCCESS) return(error); + if (error != ESUCCESS) + return (error); st->flags &= ~ST_PER_ACTION; - st->flags |= ST_AT_BOM; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = REWIND; scsi_cmd.byte2 = immed ? SR_IMMED : 0; - return (st_scsi_cmd(unit, - &scsi_cmd, - sizeof(scsi_cmd), - 0, - 0, - immed?5000:300000, /* 5 sec or 5 min */ - NULL, - flags)); -} - -/***************************************************************\ -* 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 deques the buf and creates a scsi command to perform the * -* transfer in the buf. The transfer request will call st_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 */ -ststart(unit) -{ - int drivecount; - register struct buf *bp = 0; - register struct buf *dp; - struct scsi_rw_tape cmd; - int blkno, nblk; - struct st_data *st = st_data[unit]; - int flags; - - - -#ifdef STDEBUG - if(scsi_debug & PRINTROUTINES) printf("ststart%d ",unit); -#endif /*STDEBUG*/ - /*******************************************************\ - * See if there is a buf to do and we are not already * - * doing one * - \*******************************************************/ - if(st->scsi_xfer.flags & INUSE) - { - return; /* unit already underway */ - } -trynext: - if(st->xfer_block_wait) /* a special awaits, let it proceed first */ - { - wakeup(&(st->xfer_block_wait)); - return; - } - - if ((bp = st->buf_queue) == NULL) - { - return; /* no work to bother with */ - } - st->buf_queue = bp->b_actf; - - - - /*******************************************************\ - * only FIXEDBLOCK devices have pending 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. * - \***************************************/ - if (st_space(unit, 0, SP_FILEMARKS, 0) != - ESUCCESS) goto badnews; - } - else - { - bp->b_resid = bp->b_bcount; - bp->b_error = 0; - bp->b_flags &= ~B_ERROR; - st->flags &= ~ST_AT_FILEMARK; - biodone(bp); - goto trynext; - } - } - /*******************************************************\ - * If we are at EIO (e.g. EOM) but have not reported it * - * yet then we should report it now * - \*******************************************************/ - if(st->flags & ST_EIO_PENDING) - { - bp->b_resid = bp->b_bcount; - bp->b_error = EIO; - bp->b_flags |= B_ERROR; - st->flags &= ~ST_EIO_PENDING; - biodone(bp); - goto trynext; - } - } - /*******************************************************\ - * Fill out the scsi command * - \*******************************************************/ - bzero(&cmd, sizeof(cmd)); - if((bp->b_flags & B_READ) == B_WRITE) - { - cmd.op_code = WRITE_COMMAND_TAPE; - st->flags &= ~ST_FM_WRITTEN; - st->flags |= ST_WRITTEN; - flags = SCSI_DATA_OUT; - } - else - { - cmd.op_code = READ_COMMAND_TAPE; - flags = SCSI_DATA_IN; - } - - /*******************************************************\ - * Handle "fixed-block-mode" tape drives by using the * - * block count instead of the length. * - \*******************************************************/ - if(st->flags & ST_FIXEDBLOCKS) - { - cmd.byte2 |= SRWT_FIXED; - lto3b(bp->b_bcount/st->blksiz,cmd.len); - } - else - { - lto3b(bp->b_bcount,cmd.len); - } - - /*******************************************************\ - * go ask the adapter to do all this for us * - \*******************************************************/ - if (st_scsi_cmd(unit, - &cmd, - sizeof(cmd), - (u_char *)bp->b_un.b_addr, - bp->b_bcount, - 100000, - bp, - flags | SCSI_NOSLEEP ) != SUCCESSFULLY_QUEUED) - - { -badnews: - printf("st%d: oops not queued\n",unit); - bp->b_flags |= B_ERROR; - bp->b_error = EIO; - biodone(bp); - return; - } - stqueues++; + return (scsi_scsi_cmd(st->sc_link, + (struct scsi_generic *) &scsi_cmd, + sizeof(scsi_cmd), + 0, + 0, + ST_RETRIES, + immed ? 5000 : 300000, /* 5 sec or 5 min */ + NULL, + flags)); } -/*******************************************************\ -* This routine is called by the scsi interrupt when * -* the transfer is complete. -\*******************************************************/ -int st_done(unit,xs) -int unit; -struct scsi_xfer *xs; -{ - struct buf *bp; - int retval; - struct st_data *st = st_data[unit]; - -#ifdef STDEBUG - if(scsi_debug & PRINTROUTINES) printf("st_done%d ",unit); -#endif /*STDEBUG*/ -#ifdef PARANOID - if (! (xs->flags & INUSE)) - panic("scsi_xfer not in use!"); -#endif /*PARANOID*/ - if((bp = xs->bp)== NULL) - { - wakeup(xs); - return; - } - switch(xs->error) - { - case XS_NOERROR: - bp->b_flags &= ~B_ERROR; - bp->b_error = 0; - bp->b_resid = 0; - break; - case XS_SENSE: - retval = (st_interpret_sense(unit,xs)); - bp->b_resid = xs->resid; /* already multiplied by blksiz */ - if(retval) - { - /***************************************\ - * We have a real error, the bit should * - * be set to indicate this. The return * - * value will contain the unix error code* - * that the error interpretation routine * - * thought was suitable, so pass this * - * value back in the buf structure. * - * Furthermore we return information * - * saying that no data was transferred * - * All status is now suspect * - \***************************************/ - bp->b_flags |= B_ERROR; - bp->b_error = retval; - bp->b_resid = bp->b_bcount; - st->flags &= ~ST_PER_ACTION; - } - else - { - /***********************************************\ - * The error interpretation code has declared * - * that it wasn't a real error, or at least that * - * we should be ignoring it if it was. * - \***********************************************/ - if(xs->resid == 0) - { - /***************************************\ - * we apparently had a corrected error * - * or something. * - * pretend the error never happenned * - \***************************************/ - bp->b_flags &= ~B_ERROR; - bp->b_error = 0; - break; - } - if ( xs->resid != xs->datalen ) - { - /***************************************\ - * Here we have the tricky part.. * - * We successfully read less data than * - * we requested. (but not 0) * - *------for variable blocksize tapes:----* - * UNDER 386BSD: * - * We should legitimatly have the error * - * bit set, with the error value set to * - * zero.. This is to indicate to the * - * physio code that while we didn't get * - * as much information as was requested, * - * we did reach the end of the record * - * and so physio should not call us * - * again for more data... we have it all * - * SO SET THE ERROR BIT! * - * * - * UNDER NetBSD: * - * To indicate the same as above, we * - * need only have a non 0 resid that is * - * less than the b_bcount, but the * - * ERROR BIT MUST BE CLEAR! (sigh) * - * * - *-------for fixed blocksize device------* - * We read some successful records * - * before hitting the EOF or EOT. These * - * must be passed to the user, before we * - * report the EOx. We will report the * - * EOx NEXT time. * - \***************************************/ -#ifdef NETBSD - bp->b_flags &= ~B_ERROR; +#ifdef NETBSD +#define SIGNAL_SHORT_READ #else - bp->b_flags |= B_ERROR; -#endif - bp->b_error = 0; - xs->error = XS_NOERROR; - break; - } - else - { - /***************************************\ - * We have come out of the error handler * - * with no error code. We have also not * - * transferred any data (would have gone * - * to the previous clause). * - * This must be an EOF * - * Any caller request to read no * - * data would have been short-circuited * - * at st_read or ststrategy. * - * * - * At least all o/s agree that: * - * 0 bytes read with no error is EOF * - \***************************************/ - - bp->b_error = 0; - bp->b_flags &= ~B_ERROR; - st->flags &= ~ST_AT_FILEMARK; - break; - } - } - break; - - case XS_TIMEOUT: - printf("st%d: timeout\n",unit); - - case XS_BUSY: /* should retry */ /* how? */ - /************************************************/ - /* SHOULD put buf back at head of queue */ - /* and decrement retry count in (*xs) */ - /* HOWEVER, this should work as a kludge */ - /************************************************/ - if(xs->retries--) - { - xs->flags &= ~ITSDONE; - xs->error = XS_NOERROR; - if ( (*(st->sc_sw->scsi_cmd))(xs) - == SUCCESSFULLY_QUEUED) - { /* don't wake the job, ok? */ - return; - } - printf("st%d: device busy\n",unit); - xs->flags |= ITSDONE; - } - - case XS_DRIVER_STUFFUP: - bp->b_flags |= B_ERROR; - bp->b_error = EIO; - break; - default: - printf("st%d: unknown error category from scsi driver\n" - ,unit); - } - biodone(bp); - xs->flags = 0; /* no longer in use */ - ststart(unit); /* If there's another waiting.. do it */ -} - - +#define SIGNAL_SHORT_READ bp->b_flags |= B_ERROR; +#endif -/*******************************************************\ -* ask the scsi driver to perform a command for us. * -* Call it through the switch table, and tell it which * -* sub-unit we want, and what target and lu we wish to * -* talk to. Also tell it where to find the command * -* how long int is. * -* Also tell it where to read/write the data, and how * -* long the data is supposed to be * -\*******************************************************/ -int st_scsi_cmd(unit,scsi_cmd,cmdlen,data_addr,datalen,timeout,bp,flags) - -int unit,flags; -struct scsi_generic *scsi_cmd; -int cmdlen; -int timeout; -u_char *data_addr; -struct buf *bp; -int datalen; +/* + * Look at the returned sense and act on the error and detirmine + * The unix error number to pass back... (0 = report no error) + * (-1 = continue processing) + */ +errval +st_interpret_sense(xs) + struct scsi_xfer *xs; { - struct scsi_xfer *xs; - int retval; - int s; - struct st_data *st = st_data[unit]; - -#ifdef STDEBUG - if(scsi_debug & PRINTROUTINES) printf("\nst_scsi_cmd%d ",unit); -#endif /*STDEBUG*/ -#ifdef PARANOID - if(st->sc_sw == NULL) /* If we have no scsi driver */ - { - printf("st%d: not set up\n",unit); - return(EINVAL); + struct scsi_link *sc_link = xs->sc_link; + struct scsi_sense_data *sense = &(xs->sense); + boolean silent = xs->flags & SCSI_SILENT; + struct buf *bp = xs->bp; + u_int32 unit = sc_link->dev_unit; + struct st_data *st = st_data[unit]; + u_int32 key; + int32 info; + + /* + * Get the sense fields and work out what code + */ + if (sense->error_code & SSD_ERRCODE_VALID) { + info = ntohl(*((int32 *) sense->ext.extended.info)); + } else { + info = xs->datalen; /* bad choice if fixed blocks */ } -#endif /*PARANOID*/ - - xs = &(st->scsi_xfer); - if(!(flags & SCSI_NOMASK)) - s = splbio(); - st->xfer_block_wait++; /* there is someone waiting */ - while (xs->flags & INUSE) - { - if(flags & SCSI_NOSLEEP) - return EBUSY; - sleep(&(st->xfer_block_wait),PRIBIO+1); + if ((sense->error_code & SSD_ERRCODE) != 0x70) { + return (-1); /* let the generic code handle it */ } - st->xfer_block_wait--; - xs->flags = INUSE; - if(!(flags & SCSI_NOMASK)) - splx(s); - - /*******************************************************\ - * Fill out the scsi_xfer structure * - \*******************************************************/ - xs->flags |= flags; - xs->adapter = st->ctlr; - xs->targ = st->targ; - xs->lu = st->lu; - xs->retries = bp?0:ST_RETRIES;/*can't retry on IO*/ - xs->timeout = timeout; - xs->cmd = scsi_cmd; - xs->cmdlen = cmdlen; - xs->data = data_addr; - xs->datalen = datalen; - xs->resid = datalen; - xs->when_done = st_done; - xs->done_arg = unit; - xs->done_arg2 = (int)xs; - xs->bp = bp; -retry: xs->error = XS_NOERROR; - - /***********************************************\ - * Ask the adapter to do the command for us * - \***********************************************/ - retval = (*(st->sc_sw->scsi_cmd))(xs); - - /***********************************************\ - * IO operations are handled differently.. * - * Physio does the sleep, and error handling is * - * Done in st_done at interrupt time * - \***********************************************/ - if(bp) return retval; - - /***********************************************\ - * Wait for the result if queued, or handle the * - * error if it was rejected.. * - \***********************************************/ - switch(retval) - { - case SUCCESSFULLY_QUEUED: - s = splbio(); - while(!(xs->flags & ITSDONE)) - sleep(xs,PRIBIO+1); - splx(s); - /*******************************\ - * finished.. check for failure * - * Fall through...... * - \*******************************/ - case HAD_ERROR: - case COMPLETE: - switch(xs->error) - { - case XS_NOERROR: - retval = ESUCCESS; - break; - case XS_SENSE: - retval = (st_interpret_sense(unit,xs)); - /* only useful for reads *//* why did I say that?*/ - if (retval) - { /* error... don't care about filemarks */ - st->flags &= ~ST_PER_ACTION; - } - else - { - xs->error = XS_NOERROR; - retval = ESUCCESS; - } - break; - case XS_DRIVER_STUFFUP: - retval = EIO; - break; - case XS_BUSY: - /* should sleep 1 sec here */ - case XS_TIMEOUT: - if(xs->retries-- ) - { - xs->flags &= ~ITSDONE; - goto retry; + if (st->flags & ST_FIXEDBLOCKS) { + xs->resid = info * st->blksiz; + if (sense->ext.extended.flags & SSD_EOM) { + st->flags |= ST_EIO_PENDING; + if (bp) { + bp->b_resid = xs->resid; + SIGNAL_SHORT_READ } - retval = EIO; - break; - default: - retval = EIO; - printf("st%d: unknown error category from scsi driver\n" - ,unit); - break; - } - break; - case TRY_AGAIN_LATER: - if(xs->retries-- ) - { - xs->flags &= ~ITSDONE; - /* should delay here */ - goto retry; } - retval = EIO; - break; - default: - retval = EIO; - } - xs->flags = 0; /* it's free! */ - ststart(unit); - return(retval); -} -/***************************************************************\ -* Look at the returned sense and act on the error and detirmine * -* The unix error number to pass back... (0 = report no error) * -\***************************************************************/ - -int st_interpret_sense(unit,xs) -int unit; -struct scsi_xfer *xs; -{ - struct scsi_sense_data *sense; - int key; - int silent = xs->flags & SCSI_SILENT; - struct st_data *st = st_data[unit]; - int info; - static char *error_mes[] = { "soft error (corrected)", - "not ready", "medium error", - "non-media hardware failure", "illegal request", - "unit attention", "tape is write-protected", - "no data found", "vendor unique", - "copy aborted", "command aborted", - "search returned equal", "volume overflow", - "verify miscompare", "unknown error key" - }; - - /***************************************************************\ - * If errors are ok, report a success * - \***************************************************************/ - if(xs->flags & SCSI_ERR_OK) return(ESUCCESS); - - /***************************************************************\ - * Get the sense fields and work out what code * - \***************************************************************/ - sense = &(xs->sense); -#ifdef STDEBUG - if(st_debug) - { - int count = 0; - printf("code%x valid%x\n" - ,sense->error_code & SSD_ERRCODE - ,sense->error_code & SSD_ERRCODE_VALID ? 1 : 0); - printf("seg%x key%x ili%x eom%x fmark%x\n" - ,sense->ext.extended.segment - ,sense->ext.extended.flags & SSD_KEY - ,sense->ext.extended.flags & SSD_ILI ? 1 : 0 - ,sense->ext.extended.flags & SSD_EOM ? 1 : 0 - ,sense->ext.extended.flags & SSD_FILEMARK ? 1 : 0); - printf("info: %x %x %x %x followed by %d extra bytes\n" - ,sense->ext.extended.info[0] - ,sense->ext.extended.info[1] - ,sense->ext.extended.info[2] - ,sense->ext.extended.info[3] - ,sense->ext.extended.extra_len); - printf("extra: "); - while(count < sense->ext.extended.extra_len) - { - printf ("%x ",sense->ext.extended.extra_bytes[count++]); + if (sense->ext.extended.flags & SSD_FILEMARK) { + st->flags |= ST_AT_FILEMARK; + if (bp) { + bp->b_resid = xs->resid; + SIGNAL_SHORT_READ + } } - printf("\n"); - } -#endif /*STDEBUG*/ - if(sense->error_code & SSD_ERRCODE_VALID) - { - info = ntohl(*((long *)sense->ext.extended.info)); - } - else - { - info = xs->datalen; /* bad choice if fixed blocks */ - } - - - switch(sense->error_code & SSD_ERRCODE) - { - /***************************************************************\ - * If it's code 70, use the extended stuff and interpret the key * - \***************************************************************/ - case 0x70: - if(st->flags & ST_FIXEDBLOCKS) - { - xs->resid = info * st->blksiz; - if(sense->ext.extended.flags & SSD_EOM) - { - st->flags |= ST_EIO_PENDING; + if (sense->ext.extended.flags & SSD_ILI) { + st->flags |= ST_EIO_PENDING; + if (bp) { + bp->b_resid = xs->resid; + SIGNAL_SHORT_READ } - if(sense->ext.extended.flags & SSD_FILEMARK) - { - st->flags |= ST_AT_FILEMARK; + if (sense->error_code & SSD_ERRCODE_VALID && + !silent) + printf("st%d: block wrong size" + ", %d blocks residual\n", unit + ,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_SNS_HLP) && + !(sc_link->flags & SDEV_MEDIA_LOADED)) { + st->blksiz -= 512; } - if(sense->ext.extended.flags & SSD_ILI) - { - st->flags |= ST_EIO_PENDING; - if (sense->error_code & SSD_ERRCODE_VALID && - !silent) - printf("st%d: %d-byte block wrong size" - "\n", unit, xs->datalen - 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_SNS_HLP) && - !(st->flags & ST_INFO_VALID)) - { - st->blksiz -= 512; - } + } + /* + * If no data was tranfered, do it immediatly + */ + if (xs->resid >= xs->datalen) { + if (st->flags & ST_EIO_PENDING) { + return EIO; } - /***********************************************\ - * If no data was tranfered, do it immediatly * - \***********************************************/ - if(xs->resid >= xs->datalen) - { - if(st->flags & ST_EIO_PENDING) - { - return EIO; - } - if(st->flags & ST_AT_FILEMARK) - { - return 0; + if (st->flags & ST_AT_FILEMARK) { + if (bp) { + bp->b_resid = xs->resid; + SIGNAL_SHORT_READ } + return 0; } } - else - { - xs->resid = xs->datalen; /* to be sure */ - if(sense->ext.extended.flags & SSD_EOM) - { - return(EIO); + } else { /* must be variable mode */ + xs->resid = xs->datalen; /* to be sure */ + if (sense->ext.extended.flags & SSD_EOM) { + return (EIO); + } + if (sense->ext.extended.flags & SSD_FILEMARK) { + if (bp) + bp->b_resid = bp->b_bcount; + return 0; + } + if (sense->ext.extended.flags & SSD_ILI) { + if (info < 0) { + /* + * the record was bigger than the read + */ + if (!silent) + printf("st%d: %d-byte record " + "too big\n", unit, + xs->datalen - info); + return (EIO); } - if(sense->ext.extended.flags & SSD_FILEMARK) - { - return 0; + xs->resid = info; + if (bp) { + bp->b_resid = info; + SIGNAL_SHORT_READ } - if(sense->ext.extended.flags & SSD_ILI) - { - if(info < 0) - /***************************************\ - * the record was bigger than the read * - \***************************************/ - { - if (!silent) - printf("st%d: %d-byte record " - "too big\n", unit, - xs->datalen - info); - return(EIO); - } - xs->resid = info; + } + } + key = sense->ext.extended.flags & SSD_KEY; + + if (key == 0x8) { + /* + * 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_SNS_HLP) && + !(sc_link->flags & SDEV_MEDIA_LOADED)) { /* still starting */ + st->blksiz -= 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 */ } - }/* there may be some other error. check the rest */ + return (ESUCCESS); + } + } + return (-1); /* let the default/generic handler handle it */ +} - key=sense->ext.extended.flags & SSD_KEY; +/* + * 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. + */ +errval +st_touch_tape(unit) + u_int32 unit; +{ + struct st_data *st = st_data[unit]; + char *buf; + u_int32 readsiz; + errval errno; - if (!silent && key > 0 && (key != 0x8 || - st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) - { - printf("st%d: %s", unit, error_mes[key - 1]); - if(sense->error_code & SSD_ERRCODE_VALID) - { - switch (key) - { - case 0x2: /* NOT READY */ - case 0x5: /* ILLEGAL REQUEST */ - case 0x6: /* UNIT ATTENTION */ - case 0x7: /* DATA PROTECT */ - break; - case 0x8: /* BLANK CHECK */ - printf(", requested size: %d (decimal)", - info); - break; - default: - printf(", info = %d (decimal)", info); - } - } - printf("\n"); - } + buf = malloc(1024, M_TEMP, M_NOWAIT); + if (!buf) + return (ENOMEM); - switch (key) - { - case 0x0: /* NO SENSE */ - case 0x1: /* RECOVERED ERROR */ - if(xs->resid == xs->datalen) xs->resid = 0; - case 0xc: /* EQUAL */ - return(ESUCCESS); - case 0x2: /* NOT READY */ - return(ENODEV); - case 0x5: /* ILLEGAL REQUEST */ - return(EINVAL); - case 0x6: /* UNIT ATTENTION */ - st->flags &= ~ST_PER_MEDIA; - if (st->flags & ST_OPEN) /* TEMP!!!! */ - return(EIO); - else - return(ESUCCESS); - case 0x7: /* DATA PROTECT */ - return(EACCES); - case 0xd: /* VOLUME OVERFLOW */ - return(ENOSPC); - case 0x8: /* 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_SNS_HLP) && - !(st->flags & ST_INFO_VALID)) - { - st->blksiz -= 512; - } - else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) - { - st->flags |= ST_BLANK_READ; - xs->resid = xs->datalen; - return(ESUCCESS); - } + if (errno = st_mode_sense(unit, 0)) { + goto bad; + } + st->blksiz = 1024; + do { + switch ((int)st->blksiz) { + case 512: + case 1024: + readsiz = st->blksiz; + st->flags |= ST_FIXEDBLOCKS; + break; default: - return(EIO); + readsiz = 1; + st->flags &= ~ST_FIXEDBLOCKS; + } if (errno = st_mode_select(unit, 0)) { + goto bad; } - /***************************************************************\ - * If it's NOT code 70, just report it. * - \***************************************************************/ - default: - if (!silent) - { - printf("st%d: error code %d", unit, - sense->error_code & SSD_ERRCODE); - if(sense->error_code & SSD_ERRCODE_VALID) - { - printf(" at block no. %d (decimal)", - (sense->ext.unextended.blockhi << 16) + - (sense->ext.unextended.blockmed << 8) + - sense->ext.unextended.blocklow); - } - printf("\n"); + st_read(unit, buf, readsiz, SCSI_SILENT); + if (errno = st_rewind(unit, FALSE, 0)) { +bad: free(buf, M_TEMP); + return (errno); } - return(EIO); - } + } while (readsiz != 1 && readsiz > st->blksiz); + free(buf, M_TEMP); + return 0; } |