/* * Written by Julian Elischer (julian@dialix.oz.au) * for TRW Financial Systems for use under the MACH(2.5) operating system. * * TRW Financial Systems, in accordance with their agreement with Carnegie * Mellon University, makes this software available to CMU to distribute * or use in any manner that they see fit as long as this message is kept with * the software. For this reason TFS also grants any other persons or * organisations permission to use or modify this software. * * TFS supplies this software to be publicly redistributed * on the understanding that TFS is not responsible for the correct * functioning of this software in any circumstances. * * Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992 * * $Id: sd.c,v 1.9 1993/09/20 06:27:04 rgrimes Exp $ */ #define SPLSD splbio #define ESUCCESS 0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include long int sdstrats,sdqueues; #include #if NDDB > 0 int Debugger(); #else NDDB > 0 #define Debugger() #endif NDDB > 0 #define PAGESIZ 4096 #define SECSIZE 512 #define PDLOCATION 29 #define BOOTRECORDSIGNATURE (0x55aa & 0x00ff) #define SDOUTSTANDING 2 #define SDQSIZE 4 #define SD_RETRIES 4 #define MAKESDDEV(maj, unit, part) (makedev(maj,((unit<<3)+part))) #define UNITSHIFT 3 #define PARTITION(z) (minor(z) & 0x07) #define RAW_PART 3 #define UNIT(z) ( (minor(z) >> UNITSHIFT) ) #define WHOLE_DISK(unit) ( (unit << UNITSHIFT) + RAW_PART ) struct buf sd_buf_queue[NSD]; int sd_done(); int sdstrategy(); #ifdef SDDEBUG int sd_debug = 0; #endif /*SDDEBUG*/ struct scsi_xfer *sd_free_xfer[NSD]; int sd_xfer_block_wait[NSD]; struct sd_data { int flags; #define SDVALID 0x02 /* PARAMS LOADED */ #define SDINIT 0x04 /* device has been init'd */ #define SDWAIT 0x08 /* device has someone waiting */ #define SDHAVELABEL 0x10 /* have read the label */ #define SDDOSPART 0x20 /* Have read the DOS partition table */ #define SDWRITEPROT 0x40 /* Device in readonly mode (S/W)*/ 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; /* out scsi lu */ long int ad_info; /* info about the adapter */ int cmdscount; /* cmds allowed outstanding by board*/ int wlabel; /* label is writable */ struct disk_parms { u_char heads; /* Number of heads */ u_short cyls; /* Number of cylinders */ u_char sectors;/*dubious*/ /* Number of sectors/track */ u_short secsiz; /* Number of bytes/sector */ u_long disksize; /* total number sectors */ }params; struct disklabel disklabel; struct dos_partition dosparts[NDOSPART]; /* DOS view of disk */ int partflags[MAXPARTITIONS]; /* per partition flags */ #define SDOPEN 0x01 int openparts; /* one bit for each open partition */ unsigned int sd_start_of_unix; /* unix vs dos partitions */ }*sd_data[NSD]; static int next_sd_unit = 0; /***********************************************************************\ * The routine called by the low level scsi routine when it discovers * * A device suitable for this driver * \***********************************************************************/ int sdattach(ctlr,targ,lu,scsi_switch) struct scsi_switch *scsi_switch; { int unit,i; unsigned char *tbl; struct sd_data *sd; struct disk_parms *dp; long int ad_info; struct scsi_xfer *sd_scsi_xfer; unit = next_sd_unit++; #ifdef SDDEBUG if(scsi_debug & PRINTROUTINES) printf("sdattach: "); #endif /*SDDEBUG*/ /*******************************************************\ * Check we have the resources for another drive * \*******************************************************/ if( unit >= NSD) { printf("Too many scsi disks..(%d > %d) reconfigure kernel\n",(unit + 1),NSD); return(0); } if(sd_data[unit]) { printf("sd%d: unit already has storage allocated!\n",unit); return(0); } sd = sd_data[unit] = malloc(sizeof(struct sd_data),M_DEVBUF,M_NOWAIT); if(!sd) { printf("malloc failed in sd.c\n"); return(0); } bzero(sd,sizeof(struct sd_data)); dp = &(sd->params); /*******************************************************\ * Store information needed to contact our base driver * \*******************************************************/ sd->sc_sw = scsi_switch; sd->ctlr = ctlr; sd->targ = targ; sd->lu = lu; if(sd->sc_sw->adapter_info) { sd->ad_info = ( (*(sd->sc_sw->adapter_info))(ctlr)); sd->cmdscount = sd->ad_info & AD_INF_MAX_CMDS; if(sd->cmdscount > SDOUTSTANDING) { sd->cmdscount = SDOUTSTANDING; } } else { sd->ad_info = 1; sd->cmdscount = 1; } i = sd->cmdscount; sd_scsi_xfer = (struct scsi_xfer *)malloc(sizeof(struct scsi_xfer) * i ,M_TEMP, M_NOWAIT); while(i-- ) { sd_scsi_xfer->next = sd_free_xfer[unit]; sd_free_xfer[unit] = sd_scsi_xfer; sd_scsi_xfer++; } /*******************************************************\ * Use the subdriver to request information regarding * * the drive. We cannot use interrupts yet, so the * * request must specify this. * \*******************************************************/ sd_get_parms(unit, SCSI_NOSLEEP | SCSI_NOMASK); printf("sd%d: %dMB (%d total sec), %d cyl, %d head, %d sec, bytes/sec %d\n", unit, dp->disksize / ((1024L * 1024L) / dp->secsiz), dp->disksize, dp->cyls, dp->heads, dp->sectors, dp->secsiz); sd->flags |= SDINIT; return; } /*******************************************************\ * open the device. Make sure the partition info * * is a up-to-date as can be. * \*******************************************************/ sdopen(dev) { int errcode = 0; int unit, part; struct disk_parms disk_parms; struct sd_data *sd ; unit = UNIT(dev); part = PARTITION(dev); sd = sd_data[unit]; #ifdef SDDEBUG if(scsi_debug & (PRINTROUTINES | TRACEOPENS)) printf("sdopen: dev=0x%x (unit %d (of %d),partition %d)\n" , dev, unit, NSD, part); #endif /*SDDEBUG*/ /*******************************************************\ * Check the unit is legal * \*******************************************************/ if ( unit >= NSD ) { return(ENXIO); } /*******************************************************\ * Make sure the disk has been initialised * * At some point in the future, get the scsi driver * * to look for a new device if we are not initted * \*******************************************************/ if (! (sd->flags & SDINIT)) { return(ENXIO); } /*******************************************************\ * If it's been invalidated, and not everybody has * * closed it then forbid re-entry. * \*******************************************************/ if ((! (sd->flags & SDVALID)) && ( sd->openparts)) return(ENXIO); /*******************************************************\ * "unit attention" errors should occur here if the * * drive has been restarted or the pack changed. * * just ingnore the result, it's a decoy instruction * * The error code will act on the error though * * and invalidate any media information we had. * \*******************************************************/ sd_test_unit_ready(unit,0); /*******************************************************\ * In case it is a funny one, tell it to start * * not needed for most hard drives (ignore failure) * \*******************************************************/ sd_start_unit(unit,SCSI_ERR_OK|SCSI_SILENT); /*******************************************************\ * Check that it is still responding and ok. * \*******************************************************/ if (sd_test_unit_ready(unit,0)) { #ifdef SDDEBUG if(scsi_debug & TRACEOPENS) printf("device not reponding\n"); #endif /*SDDEBUG*/ return(ENXIO); } #ifdef SDDEBUG if(scsi_debug & TRACEOPENS) printf("device ok\n"); #endif /*SDDEBUG*/ /*******************************************************\ * Load the physical device parameters * \*******************************************************/ sd_get_parms(unit, 0); /* sets SDVALID */ if (sd->params.secsiz != SECSIZE) /* XXX One day...*/ { printf("sd%d: Can't deal with %d bytes logical blocks\n" ,unit, sd->params.secsiz); Debugger(); return(ENXIO); } #ifdef SDDEBUG if(scsi_debug & TRACEOPENS) printf("Params loaded "); #endif /*SDDEBUG*/ /*******************************************************\ * Load the partition info if not already loaded * * Lock the pack in * \*******************************************************/ sd_prevent(unit,PR_PREVENT,SCSI_ERR_OK|SCSI_SILENT); if((errcode = sdgetdisklabel(unit)) && (part != RAW_PART)) { sd_prevent(unit,PR_ALLOW,SCSI_ERR_OK|SCSI_SILENT); return(errcode); } #ifdef SDDEBUG if(scsi_debug & TRACEOPENS) printf("Disklabel loaded "); #endif /*SDDEBUG*/ /*******************************************************\ * Check the partition is legal * \*******************************************************/ if ( part >= MAXPARTITIONS ) { sd_prevent(unit,PR_ALLOW,SCSI_ERR_OK|SCSI_SILENT); /* who cares if it fails? */ return(ENXIO); } #ifdef SDDEBUG if(scsi_debug & TRACEOPENS) printf("ok"); #endif /*SDDEBUG*/ /*******************************************************\ * Check that the partition exists * \*******************************************************/ if (( sd->disklabel.d_partitions[part].p_size == 0 ) && (part != RAW_PART)) { sd_prevent(unit,PR_ALLOW,SCSI_ERR_OK|SCSI_SILENT); /* who cares if it fails? */ return(ENXIO); } sd->partflags[part] |= SDOPEN; sd->openparts |= (1 << part); #ifdef SDDEBUG if(scsi_debug & TRACEOPENS) printf("open %d %d\n",sdstrats,sdqueues); #endif /*SDDEBUG*/ return(0); } /*******************************************************\ * Get ownership of a scsi_xfer * * If need be, sleep on it, until it comes free * \*******************************************************/ struct scsi_xfer *sd_get_xs(unit,flags) int flags; int unit; { struct scsi_xfer *xs; int s; if(flags & (SCSI_NOSLEEP | SCSI_NOMASK)) { if (xs = sd_free_xfer[unit]) { sd_free_xfer[unit] = xs->next; xs->flags = 0; } } else { s = SPLSD(); while (!(xs = sd_free_xfer[unit])) { sd_xfer_block_wait[unit]++; /* someone waiting! */ sleep((caddr_t)&sd_free_xfer[unit], PRIBIO+1); sd_xfer_block_wait[unit]--; } sd_free_xfer[unit] = xs->next; splx(s); xs->flags = 0; } return(xs); } /*******************************************************\ * Free a scsi_xfer, wake processes waiting for it * \*******************************************************/ sd_free_xs(unit,xs,flags) struct scsi_xfer *xs; int unit; int flags; { int s; if(flags & SCSI_NOMASK) { if (sd_xfer_block_wait[unit]) { printf("doing a wakeup from NOMASK mode\n"); wakeup((caddr_t)&sd_free_xfer[unit]); } xs->next = sd_free_xfer[unit]; sd_free_xfer[unit] = xs; } else { s = SPLSD(); if (sd_xfer_block_wait[unit]) wakeup((caddr_t)&sd_free_xfer[unit]); xs->next = sd_free_xfer[unit]; sd_free_xfer[unit] = xs; splx(s); } } /*******************************************************\ * trim the size of the transfer if needed, * * called by physio * * basically the smaller of our max and the scsi driver's* * minphys (note we have no max) * \*******************************************************/ /* Trim buffer length if buffer-size is bigger than page size */ void sdminphys(bp) struct buf *bp; { (*(sd_data[UNIT(bp->b_dev)]->sc_sw->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 sdstrategy(bp) struct buf *bp; { struct buf *dp; unsigned int opri; struct sd_data *sd ; int unit; sdstrats++; unit = UNIT((bp->b_dev)); sd = sd_data[unit]; #ifdef SDDEBUG if(scsi_debug & PRINTROUTINES) printf("\nsdstrategy "); if(scsi_debug & SHOWREQUESTS) printf("sd%d: %d bytes @ blk%d\n", unit,bp->b_bcount,bp->b_blkno); #endif /*SDDEBUG*/ sdminphys(bp); /*******************************************************\ * If the device has been made invalid, error out * \*******************************************************/ if(!(sd->flags & SDVALID)) { bp->b_error = EIO; goto bad; } /*******************************************************\ * "soft" write protect check * \*******************************************************/ if ((sd->flags & SDWRITEPROT) && (bp->b_flags & B_READ) == 0) { bp->b_error = EROFS; goto bad; } /*******************************************************\ * If it's a null transfer, return immediatly * \*******************************************************/ if (bp->b_bcount == 0) { goto done; } /*******************************************************\ * Decide which unit and partition we are talking about * * only raw is ok if no label * \*******************************************************/ if(PARTITION(bp->b_dev) != RAW_PART) { if (!(sd->flags & SDHAVELABEL)) { bp->b_error = EIO; goto bad; } /* * do bounds checking, adjust transfer. if error, process. * if end of partition, just return */ if (bounds_check_with_label(bp,&sd->disklabel,sd->wlabel) <= 0) goto done; /* otherwise, process transfer request */ } opri = SPLSD(); dp = &sd_buf_queue[unit]; /*******************************************************\ * Place it in the queue of disk activities for this disk* \*******************************************************/ disksort(dp, bp); /*******************************************************\ * Tell the device to get going on the transfer if it's * * not doing anything, otherwise just wait for completion* \*******************************************************/ sdstart(unit); splx(opri); return; bad: bp->b_flags |= B_ERROR; done: /*******************************************************\ * Correctly set the buf to indicate a completed xfer * \*******************************************************/ bp->b_resid = bp->b_bcount; biodone(bp); return; } /***************************************************************\ * sdstart 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 in the buf. The transfer request will call sd_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 (sdstrategy) * * * * 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. * * * * must be called at the correct (highish) spl level * \***************************************************************/ /* sdstart() is called at SPLSD from sdstrategy and sd_done*/ sdstart(unit) int unit; { int drivecount; register struct buf *bp = 0; register struct buf *dp; struct scsi_xfer *xs; struct scsi_rw_big cmd; int blkno, nblk; struct sd_data *sd = sd_data[unit]; struct partition *p ; #ifdef SDDEBUG if(scsi_debug & PRINTROUTINES) printf("sdstart%d ",unit); #endif /*SDDEBUG*/ /*******************************************************\ * Check if the device is already running full capacity * \*******************************************************/ if(!sd_free_xfer[unit]) { return; /* none for us, unit already underway */ } /*******************************************************\ * there is excess capacity, but a special waits * * It'll need the adapter as soon as we clear out of the * * way and let it run (user level wait). * \*******************************************************/ if(sd_xfer_block_wait[unit]) { return; } /*******************************************************\ * See if there is a buf with work for us to do.. * \*******************************************************/ dp = &sd_buf_queue[unit]; if ((bp = dp->b_actf) == NULL) /* yes, an assign */ { return; } dp->b_actf = bp->av_forw; /*******************************************************\ * If the device has become invalid, abort all the * * reads and writes until all files have been closed and * * re-openned * \*******************************************************/ if(!(sd->flags & SDVALID)) { goto bad; } /*******************************************************\ * We have a buf, now we know we are going to go through * * With this thing.. * * * * First, translate the block to absolute * \*******************************************************/ p = sd->disklabel.d_partitions + PARTITION(bp->b_dev); blkno = bp->b_blkno + p->p_offset; nblk = (bp->b_bcount + 511) >> 9; /*******************************************************\ * Fill out the scsi command * \*******************************************************/ bzero(&cmd, sizeof(cmd)); cmd.op_code = (bp->b_flags & B_READ) ? READ_BIG : WRITE_BIG; cmd.addr_3 = (blkno & 0xff000000) >> 24; cmd.addr_2 = (blkno & 0xff0000) >> 16; cmd.addr_1 = (blkno & 0xff00) >> 8; cmd.addr_0 = blkno & 0xff; cmd.length2 = (nblk & 0xff00) >> 8; cmd.length1 = (nblk & 0xff); /*******************************************************\ * Call the routine that chats with the adapter * * Note: we cannot sleep as we may be an interrupt * \*******************************************************/ if (sd_scsi_cmd(unit, &cmd, sizeof(cmd), (u_char *)bp->b_un.b_addr, bp->b_bcount, 10000, bp, SCSI_NOSLEEP| ((bp->b_flags & B_READ)? SCSI_DATA_IN : SCSI_DATA_OUT)) != SUCCESSFULLY_QUEUED) { bad: printf("sd%d: oops not queued",unit); bp->b_error = EIO; bp->b_flags |= B_ERROR; biodone(bp); return ; } sdqueues++; } /*******************************************************\ * Perform special action on behalf of the user * * Knows about the internals of this device * \*******************************************************/ sdioctl(dev_t dev, int cmd, caddr_t addr, int flag) { /* struct sd_cmd_buf *args;*/ int error = 0; unsigned int opri; unsigned char unit, part; register struct sd_data *sd; /*******************************************************\ * Find the device that the user is talking about * \*******************************************************/ unit = UNIT(dev); part = PARTITION(dev); sd = sd_data[unit]; #ifdef SDDEBUG if(scsi_debug & PRINTROUTINES) printf("sdioctl%d ",unit); #endif /*SDDEBUG*/ /*******************************************************\ * If the device is not valid.. abandon ship * \*******************************************************/ if (!(sd->flags & SDVALID)) return(EIO); switch(cmd) { case DIOCSBAD: error = EINVAL; break; case DIOCGDINFO: *(struct disklabel *)addr = sd->disklabel; break; case DIOCGPART: ((struct partinfo *)addr)->disklab = &sd->disklabel; ((struct partinfo *)addr)->part = &sd->disklabel.d_partitions[PARTITION(dev)]; break; case DIOCSDINFO: if ((flag & FWRITE) == 0) error = EBADF; else error = setdisklabel(&sd->disklabel, (struct disklabel *)addr, /*(sd->flags & DKFL_BSDLABEL) ? sd->openparts : */0, sd->dosparts); if (error == 0) { sd->flags |= SDHAVELABEL; } break; case DIOCWLABEL: sd->flags &= ~SDWRITEPROT; if ((flag & FWRITE) == 0) error = EBADF; else sd->wlabel = *(int *)addr; break; case DIOCWDINFO: sd->flags &= ~SDWRITEPROT; if ((flag & FWRITE) == 0) error = EBADF; else { if ((error = setdisklabel(&sd->disklabel , (struct disklabel *)addr , /*(sd->flags & SDHAVELABEL) ? sd->openparts :*/ 0 , sd->dosparts)) == 0) { int wlab; sd->flags |= SDHAVELABEL; /* ok write will succeed */ /* simulate opening partition 0 so write succeeds */ sd->openparts |= (1 << 0); /* XXX */ wlab = sd->wlabel; sd->wlabel = 1; error = writedisklabel(dev, sdstrategy, &sd->disklabel, sd->dosparts); sd->wlabel = wlab; } } break; default: error = ENOTTY; break; } return (error); } /*******************************************************\ * Load the label information on the named device * \*******************************************************/ int sdgetdisklabel(unit) unsigned char unit; { /*unsigned int n, m;*/ char *errstring; struct dos_partition *dos_partition_p; struct sd_data *sd = sd_data[unit]; /*******************************************************\ * If the inflo is already loaded, use it * \*******************************************************/ if(sd->flags & SDHAVELABEL) return(ESUCCESS); bzero(&sd->disklabel,sizeof(struct disklabel)); /*******************************************************\ * make partition 3 the whole disk in case of failure * * then get pdinfo * * for historical reasons, make part a same as raw part * \*******************************************************/ sd->disklabel.d_partitions[0].p_offset = 0; sd->disklabel.d_partitions[0].p_size = sd->params.disksize; sd->disklabel.d_partitions[RAW_PART].p_offset = 0; sd->disklabel.d_partitions[RAW_PART].p_size = sd->params.disksize; sd->disklabel.d_npartitions = MAXPARTITIONS; sd->disklabel.d_secsize = 512; /* as long as it's not 0 */ sd->disklabel.d_ntracks = sd->params.heads; sd->disklabel.d_nsectors = sd->params.sectors; sd->disklabel.d_ncylinders = sd->params.cyls; sd->disklabel.d_secpercyl = sd->params.heads * sd->params.sectors; if (sd->disklabel.d_secpercyl == 0) { sd->disklabel.d_secpercyl = 100; /* as long as it's not 0 */ /* readdisklabel divides by it (?)*/ } /*******************************************************\ * Call the generic disklabel extraction routine * \*******************************************************/ if(errstring = readdisklabel(makedev(0 ,(unit<disklabel , sd->dosparts , 0 , 0)) { printf("sd%d: %s\n",unit, errstring); return(ENXIO); } sd->flags |= SDHAVELABEL; /* WE HAVE IT ALL NOW */ return(ESUCCESS); } /*******************************************************\ * Find out from the device what it's capacity is * \*******************************************************/ sd_size(unit, flags) { struct scsi_read_cap_data rdcap; struct scsi_read_capacity scsi_cmd; int size; /*******************************************************\ * make up a scsi command and ask the scsi driver to do * * it for you. * \*******************************************************/ bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = READ_CAPACITY; /*******************************************************\ * If the command works, interpret the result as a 4 byte* * number of blocks * \*******************************************************/ if (sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), &rdcap, sizeof(rdcap), 6000, NULL, flags | SCSI_DATA_IN) != 0) { printf("sd%d: could not get size\n", unit); return(0); } else { size = rdcap.addr_0 + 1 ; size += rdcap.addr_1 << 8; size += rdcap.addr_2 << 16; size += rdcap.addr_3 << 24; } return(size); } /*******************************************************\ * Get scsi driver to send a "are you ready?" command * \*******************************************************/ sd_test_unit_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 (sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), 0, 0, 100000, NULL, flags)); } /*******************************************************\ * Prevent or allow the user to remove the tape * * Don't change this status if any partitions are open * \*******************************************************/ sd_prevent(unit,type,flags) int unit,type,flags; { struct scsi_prevent scsi_cmd; if(sd_data[unit]->openparts) return; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = PREVENT_ALLOW; scsi_cmd.how=type; return (sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), 0, 0, 5000, NULL, flags) ); } /*******************************************************\ * Get scsi driver to send a "start up" command * \*******************************************************/ sd_start_unit(unit,flags) int unit,flags; { struct scsi_start_stop scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = START_STOP; scsi_cmd.how = SSS_START; return (sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), 0, 0, 2000, NULL, flags)); } /*******************************************************\ * Tell the device to map out a defective block * \*******************************************************/ sd_reassign_blocks(unit,block) { struct scsi_reassign_blocks scsi_cmd; struct scsi_reassign_blocks_data rbdata; bzero(&scsi_cmd, sizeof(scsi_cmd)); bzero(&rbdata, sizeof(rbdata)); scsi_cmd.op_code = REASSIGN_BLOCKS; rbdata.length_msb = 0; rbdata.length_lsb = sizeof(rbdata.defect_descriptor[0]); rbdata.defect_descriptor[0].dlbaddr_3 = ((block >> 24) & 0xff); rbdata.defect_descriptor[0].dlbaddr_2 = ((block >> 16) & 0xff); rbdata.defect_descriptor[0].dlbaddr_1 = ((block >> 8) & 0xff); rbdata.defect_descriptor[0].dlbaddr_0 = ((block ) & 0xff); return(sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), &rbdata, sizeof(rbdata), 5000, NULL, SCSI_DATA_OUT)); } #define b2tol(a) (((unsigned)(a##_1) << 8) + (unsigned)a##_0 ) /*******************************************************\ * Get the scsi driver to send a full inquiry to the * * device and use the results to fill out the disk * * parameter structure. * \*******************************************************/ int sd_get_parms(unit, flags) { struct sd_data *sd = sd_data[unit]; struct disk_parms *disk_parms = &sd->params; struct scsi_mode_sense scsi_cmd; struct scsi_mode_sense_data { struct scsi_mode_header header; struct blk_desc blk_desc; union disk_pages pages; }scsi_sense; int sectors; /*******************************************************\ * First check if we have it all loaded * \*******************************************************/ if(sd->flags & SDVALID) return(0); /*******************************************************\ * First do a mode sense page 3 * \*******************************************************/ #ifdef SDDEBUG if (sd_debug) { bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = MODE_SENSE; scsi_cmd.page = 3; scsi_cmd.length = 0x24; /*******************************************************\ * do the command, but we don't need the results * * just print them for our interest's sake * \*******************************************************/ if (sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), &scsi_sense, sizeof(scsi_sense), 2000, NULL, flags | SCSI_DATA_IN) != 0) { printf("sd%d: could not mode sense (3)\n", unit); } else { printf("unit %d: %d trk/zone, %d alt_sec/zone, %d alt_trk/zone, %d alt_trk/lun\n", unit, b2tol(scsi_sense.pages.disk_format.trk_z), b2tol(scsi_sense.pages.disk_format.alt_sec), b2tol(scsi_sense.pages.disk_format.alt_trk_z), b2tol(scsi_sense.pages.disk_format.alt_trk_v)); printf(" %d sec/trk, %d bytes/sec, %d interleave, %d %d bytes/log_blk\n", b2tol(scsi_sense.pages.disk_format.ph_sec_t), b2tol(scsi_sense.pages.disk_format.bytes_s), b2tol(scsi_sense.pages.disk_format.interleave), sd_size(unit, flags), _3btol(scsi_sense.blk_desc.blklen)); } } #endif /*SDDEBUG*/ /*******************************************************\ * do a "mode sense page 4" * \*******************************************************/ bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = MODE_SENSE; scsi_cmd.page = 4; scsi_cmd.length = 0x20; /*******************************************************\ * If the command worked, use the results to fill out * * the parameter structure * \*******************************************************/ if (sd_scsi_cmd(unit, &scsi_cmd, sizeof(scsi_cmd), &scsi_sense, sizeof(scsi_sense), 2000, NULL, flags | SCSI_DATA_IN) != 0) { printf("sd%d could not mode sense (4).", unit); printf(" Using ficticious geometry\n"); /* * use adaptec standard ficticious geometry * this depends on which controller (e.g. 1542C is * different. but we have to put SOMETHING here..) */ sectors = sd_size(unit, flags); disk_parms->heads = 64; disk_parms->sectors = 32; disk_parms->cyls = sectors/(64 * 32); disk_parms->secsiz = SECSIZE; disk_parms->disksize = sectors; } else { #ifdef SDDEBUG if (sd_debug) { printf(" %d cyls, %d heads, %d precomp, %d red_write, %d land_zone\n", _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2), scsi_sense.pages.rigid_geometry.nheads, b2tol(scsi_sense.pages.rigid_geometry.st_cyl_wp), b2tol(scsi_sense.pages.rigid_geometry.st_cyl_rwc), b2tol(scsi_sense.pages.rigid_geometry.land_zone)); } #endif /*SDDEBUG*/ /*******************************************************\ * KLUDGE!!(for zone recorded disks) * * give a number of sectors so that sec * trks * cyls * * is <= disk_size * * can lead to wasted space! THINK ABOUT THIS ! * \*******************************************************/ disk_parms->heads = scsi_sense.pages.rigid_geometry.nheads; disk_parms->cyls = _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2); disk_parms->secsiz = _3btol(&scsi_sense.blk_desc.blklen); sectors = sd_size(unit, flags); disk_parms->disksize = sectors; sectors /= (disk_parms->heads * disk_parms->cyls); disk_parms->sectors = sectors; /* dubious on SCSI*//*XXX*/ } sd->flags |= SDVALID; return(0); } /*******************************************************\ * close the device.. only called if we are the LAST * * occurence of an open device * * convenient now but usually a pain * \*******************************************************/ sdclose(dev) dev_t dev; { unsigned char unit, part; unsigned int old_priority; struct sd_data *sd; unit = UNIT(dev); part = PARTITION(dev); sd = sd_data[unit]; sd->partflags[part] &= ~SDOPEN; sd->openparts &= ~(1 << part); sd_prevent(unit,PR_ALLOW,SCSI_SILENT|SCSI_ERR_OK); return(0); } /*******************************************************\ * This routine is called by the scsi interrupt when * * the transfer is complete. \*******************************************************/ int sd_done(unit,xs) int unit; struct scsi_xfer *xs; { struct buf *bp; int retval; int retries = 0; #ifdef SDDEBUG if(scsi_debug & PRINTROUTINES) printf("sd_done%d ",unit); #endif /*SDDEBUG*/ #ifdef PARANOID if (! (xs->flags & INUSE)) panic("scsi_xfer not in use!"); #endif if((bp = xs->bp) == NULL) { /***********************************************\ * if it's a normal user level request, then ask * * The user level code to handle error checking * * rather than doing it here at interrupt time * \***********************************************/ wakeup(xs); return; } /***********************************************\ * If it has a buf, we might be working with * * a request from the buffer cache or some other * * piece of code that requires us to process * * errors right now, despite cost * \***********************************************/ switch(xs->error) { case XS_NOERROR: bp->b_error = 0; bp->b_resid = 0; break; case XS_SENSE: retval = (sd_interpret_sense(unit,xs)); if(retval) { bp->b_flags |= B_ERROR; bp->b_error = retval; } break; case XS_BUSY: /*should somehow arange for a 1 sec delay here (how?)*/ case XS_TIMEOUT: /***********************************************\ * If we can, resubmit it to the adapter. * \***********************************************/ if(xs->retries--) { xs->error = XS_NOERROR; xs->flags &= ~ITSDONE; if ( (*(sd_data[unit]->sc_sw->scsi_cmd))(xs) == SUCCESSFULLY_QUEUED) { /* don't wake the job, ok? */ return; } xs->flags |= ITSDONE; } /* fall through */ case XS_DRIVER_STUFFUP: bp->b_flags |= B_ERROR; bp->b_error = EIO; break; default: printf("sd%d: unknown error category from scsi driver\n" ,unit); } /*******************************\ * tell the owner we're done * * then free our resources * * and see if there's more work * \*******************************/ biodone(bp); sd_free_xs(unit,xs,0); sdstart(unit); /* If there's anything waiting.. do it */ } /*******************************************************\ * 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 * * and how long it is. * * Also tell it where to read/write the data, and how * * long the data is supposed to be. If we have a buf * * to associate with the transfer, we need that too. * \*******************************************************/ int sd_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; int datalen; struct buf *bp; { struct scsi_xfer *xs; int retval; int s; struct sd_data *sd = sd_data[unit]; #ifdef SDDEBUG if(scsi_debug & PRINTROUTINES) printf("\nsd_scsi_cmd%d ",unit); #endif /*SDDEBUG*/ #ifdef PARANOID if(!(sd->sc_sw)) /* If we have a scsi driver */ {/* How we got here is anyone's guess */ printf("sd%d: not set up\n",unit); return(EINVAL); } #endif xs = sd_get_xs(unit,flags); /* should wait unless booting */ #ifdef PARANOID if(!xs) { printf("sd_scsi_cmd%d: controller busy" " (this should never happen)\n",unit); return(EBUSY); } #endif /*******************************************************\ * Fill out the scsi_xfer structure * \*******************************************************/ xs->flags = INUSE | flags; xs->adapter = sd->ctlr; xs->targ = sd->targ; xs->lu = sd->lu; xs->retries = SD_RETRIES; xs->timeout = timeout; xs->cmd = scsi_cmd; xs->cmdlen = cmdlen; xs->data = data_addr; xs->datalen = datalen; xs->resid = datalen; xs->when_done = sd_done; xs->done_arg = unit; xs->done_arg2 = (int)xs; xs->bp = bp; retry: xs->error = XS_NOERROR; /*******************************************************\ * Do the transfer. If we are polling we will return: * * COMPLETE, Was poll, and sd_done has been called * * HAD_ERROR, Was poll and an error was encountered * * TRY_AGAIN_LATER, Adapter short resources, try again * * * * if under full steam (interrupts) it will return: * * SUCCESSFULLY_QUEUED, will do a wakeup when complete * * HAD_ERROR, had an erro before it could queue * * TRY_AGAIN_LATER, (as for polling) * * After the wakeup, we must still check if it succeeded * * * * If we have a bp however, all the error proccessing * * and the buffer code both expect us to return straight * * to them, so as soon as the command is queued, return * \*******************************************************/ retval = (*(sd->sc_sw->scsi_cmd))(xs); if(bp) return retval; /* will sleep (or not) elsewhere */ /*******************************************************\ * Only here for non I/O cmds. It's cheaper to process * * the error status here than at interrupt time so * * sd_done will have done nothing except wake us up. * \*******************************************************/ switch(retval) { case SUCCESSFULLY_QUEUED: s = splbio(); while(!(xs->flags & ITSDONE)) sleep(xs,PRIBIO+1); splx(s); /* fall through to check success of completed command */ case HAD_ERROR: switch(xs->error) { case XS_NOERROR: /* nearly always hit this one */ retval = ESUCCESS; break; case XS_SENSE: retval = (sd_interpret_sense(unit,xs)); break; case XS_BUSY: /* should sleep 1 sec here */ case XS_TIMEOUT: if(xs->retries-- ) { xs->flags &= ~ITSDONE; goto retry; } case XS_DRIVER_STUFFUP: retval = EIO; break; default: retval = EIO; printf("sd%d: unknown error category from scsi driver\n" ,unit); } break; case COMPLETE: /* Polling command completed ok */ retval = ESUCCESS; break; case TRY_AGAIN_LATER: /* adapter resource shortage */ /* should sleep 1 sec here */ if(xs->retries-- ) { xs->flags &= ~ITSDONE; goto retry; } default: retval = EIO; } /*******************************************************\ * we have finished with the xfer stuct, free it and * * check if anyone else needs to be started up. * \*******************************************************/ sd_free_xs(unit,xs,flags); sdstart(unit); /* check queue */ 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 sd_interpret_sense(unit,xs) int unit; struct scsi_xfer *xs; { struct scsi_sense_data *sense; int key; int silent; long int info; /***************************************************************\ * If the flags say errs are ok, then always return ok. * \***************************************************************/ if (xs->flags & SCSI_ERR_OK) return(ESUCCESS); silent = (xs->flags & SCSI_SILENT); sense = &(xs->sense); info = ((sense->ext.extended.info[0] <<24)| (sense->ext.extended.info[1] <<16)| (sense->ext.extended.info[2] <<8)| (sense->ext.extended.info[3] )); switch(sense->error_code & SSD_ERRCODE) { case 0x70: { key=sense->ext.extended.flags & SSD_KEY; switch(key) { case 0x0: return(ESUCCESS); case 0x1: if(!silent) { printf("sd%d: soft error(corrected) ", unit); if(sense->error_code & SSD_ERRCODE_VALID) { printf("block no. %d (decimal)",info); } printf("\n"); } return(ESUCCESS); case 0x2: if(!silent)printf("sd%d: not ready\n ", unit); return(ENODEV); case 0x3: if(!silent) { printf("sd%d: medium error ", unit); if(sense->error_code & SSD_ERRCODE_VALID) { printf("block no. %d (decimal)",info); } printf("\n"); } return(EIO); case 0x4: if(!silent)printf("sd%d: non-media hardware failure\n ", unit); return(EIO); case 0x5: if(!silent)printf("sd%d: illegal request\n ", unit); return(EINVAL); case 0x6: /***********************************************\ * If we are not open, then this is not an error * * as we don't have state yet. Either way, make * * sure that we don't have any residual state * \***********************************************/ if(!silent)printf("sd%d: Unit attention.\n ", unit); sd_data[unit]->flags &= ~(SDVALID | SDHAVELABEL); if (sd_data[unit]->openparts) { return(EIO); } return(ESUCCESS); /* not an error if nothing's open */ case 0x7: if(!silent) { printf("sd%d: attempted protection violation ", unit); if(sense->error_code & SSD_ERRCODE_VALID) { printf("block no. %d (decimal)\n",info); } printf("\n"); } return(EACCES); case 0x8: if(!silent) { printf("sd%d: block wrong state (format?)\n ", unit); if(sense->error_code & SSD_ERRCODE_VALID) { printf("block no. %d (decimal)\n",info); } printf("\n"); } return(EIO); case 0x9: if(!silent)printf("sd%d: vendor unique\n", unit); return(EIO); case 0xa: if(!silent)printf("sd%d: copy aborted\n ", unit); return(EIO); case 0xb: if(!silent)printf("sd%d: command aborted\n ", unit); return(EIO); case 0xc: if(!silent) { printf("sd%d: search returned\n ", unit); if(sense->error_code & SSD_ERRCODE_VALID) { printf("block no. %d (decimal)\n",info); } printf("\n"); } return(ESUCCESS); case 0xd: if(!silent)printf("sd%d: volume overflow\n ", unit); return(ENOSPC); case 0xe: if(!silent) { printf("sd%d: verify miscompare\n ", unit); if(sense->error_code & SSD_ERRCODE_VALID) { printf("block no. %d (decimal)\n",info); } printf("\n"); } return(EIO); case 0xf: if(!silent)printf("sd%d: unknown error key\n ", unit); return(EIO); } break; } default: { if(!silent)printf("sd%d: code %d\n", unit, sense->error_code & SSD_ERRCODE); if(sense->error_code & SSD_ERRCODE_VALID) if(!silent)printf("block no. %d (decimal)\n", (sense->ext.unextended.blockhi <<16) + (sense->ext.unextended.blockmed <<8) + (sense->ext.unextended.blocklow )); } return(EIO); } } int sdsize(dev_t dev) { int unit = UNIT(dev), part = PARTITION(dev), val; struct sd_data *sd; if (unit >= NSD) return(-1); sd = sd_data[unit]; if(!sd) return(-1); if((sd->flags & SDINIT) == 0) return(-1); if (sd == 0 || (sd->flags & SDHAVELABEL) == 0) val = sdopen (MAKESDDEV(major(dev), unit, RAW_PART), FREAD, S_IFBLK, 0); if ( val != 0 || sd->flags & SDWRITEPROT) return (-1); return((int)sd->disklabel.d_partitions[part].p_size); } /*#define SCSIDUMP*/ #ifdef SCSIDUMP #include /***********************************************************************\ * dump all of physical memory into the partition specified, starting * * at offset 'dumplo' into the partition. * \***********************************************************************/ static struct scsi_xfer sx; #define MAXTRANSFER 8 /* 1 page at a time */ int sddump(dev_t dev) /* dump core after a system crash */ { register struct sd_data *sd; /* disk unit to do the IO */ long num; /* number of sectors to write */ int unit, part, sdc; long blkoff, blknum, blkcnt; long nblocks; char *addr; struct scsi_rw_big cmd; extern int Maxmem; static sddoingadump = 0 ; extern caddr_t CADDR1; /* map the page we are about to write, here*/ struct scsi_xfer *xs = &sx; int retval; addr = (char *) 0; /* starting address */ /* toss any characters present prior to dump */ while (sgetc(1)) ; /* size of memory to dump */ num = Maxmem; unit = UNIT(dev); /* eventually support floppies? */ part = PARTITION(dev); /* file system */ /* check for acceptable drive number */ if (unit >= NSD) return(ENXIO); /* 31 Jul 92*/ sd = sd_data[unit]; if(!sd) return (ENXIO); /* was it ever initialized etc. ? */ if (!(sd->flags & SDINIT)) return (ENXIO); if (sd->flags & SDVALID != SDVALID) return (ENXIO) ; if (sd->flags & SDWRITEPROT) return (ENXIO); /* Convert to disk sectors */ num = (u_long) num * NBPG / sd->disklabel.d_secsize; /* check if controller active */ if (sddoingadump) return(EFAULT); nblocks = sd->disklabel.d_partitions[part].p_size; blkoff = sd->disklabel.d_partitions[part].p_offset; /* check transfer bounds against partition size */ if ((dumplo < 0) || ((dumplo + num) > nblocks)) return(EINVAL); sddoingadump = 1 ; blknum = dumplo + blkoff; while (num > 0) { if (blkcnt > MAXTRANSFER) blkcnt = MAXTRANSFER; pmap_enter( kernel_pmap, CADDR1, trunc_page(addr), VM_PROT_READ, TRUE); #ifndef NOT_TRUSTED /*******************************************************\ * Fill out the scsi command * \*******************************************************/ bzero(&cmd, sizeof(cmd)); cmd.op_code = WRITE_BIG; cmd.addr_3 = (blknum & 0xff000000) >> 24; cmd.addr_2 = (blknum & 0xff0000) >> 16; cmd.addr_1 = (blknum & 0xff00) >> 8; cmd.addr_0 = blknum & 0xff; cmd.length2 = (blkcnt & 0xff00) >> 8; cmd.length1 = (blkcnt & 0xff); /*******************************************************\ * Fill out the scsi_xfer structure * * Note: we cannot sleep as we may be an interrupt * \*******************************************************/ bzero(xs, sizeof(sx)); xs->flags |= SCSI_NOMASK|SCSI_NOSLEEP|INUSE; xs->adapter = sd->ctlr; xs->targ = sd->targ; xs->lu = sd->lu; xs->retries = SD_RETRIES; xs->timeout = 10000;/* 10000 millisecs for a disk !*/ xs->cmd = (struct scsi_generic *)&cmd; xs->cmdlen = sizeof(cmd); xs->resid = blkcnt * 512; xs->when_done = 0; xs->done_arg = unit; xs->done_arg2 = (int)xs; xs->error = XS_NOERROR; xs->bp = 0; xs->data = (u_char *)CADDR1; xs->datalen = blkcnt * 512; /*******************************************************\ * Pass all this info to the scsi driver. * \*******************************************************/ retval = (*(sd->sc_sw->scsi_cmd))(xs); switch(retval) { case SUCCESSFULLY_QUEUED: case HAD_ERROR: return(ENXIO); /* we said not to sleep! */ case COMPLETE: break; default: return(ENXIO); /* we said not to sleep! */ } #else NOT_TRUSTED /* lets just talk about this first...*/ printf ("sd%d: dump addr 0x%x, blk %d\n",unit,addr,blknum); #endif NOT_TRUSTED if ((unsigned)addr % (1024*1024) == 0) printf("%d ", num/2048) ; /* update block count */ num -= MAXTRANSFER; blknum += MAXTRANSFER ; (int) addr += 512 * MAXTRANSFER; /* operator aborting dump? */ if (sgetc(1)) return(EINTR); } return(0); } #else SCSIDUMP sddump() { printf("\nsddump() -- not implemented\n"); DELAY(20000000); /* 20 seconds */ return(-1); } #endif SCSIDUMP