/* * 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 1.16 1994/01/22 11:05:16 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 #include #include u_int32 sdstrats, sdqueues; #ifdef NetBSD #ifdef DDB int Debugger(); #else /* DDB */ #define Debugger() #endif /* DDB */ #else /* NetBSD */ #include #if NDDB > 0 #else /* NDDB > 0 */ #define Debugger(s) #endif /* NDDB > 0 */ #endif #define PAGESIZ 4096 #define SECSIZE 512 #define PDLOCATION 29 #define BOOTRECORDSIGNATURE (0x55aa & 0x00ff) #define SDOUTSTANDING 2 #define SDQSIZE 4 #define SD_RETRIES 4 #define MAXTRANSFER 8 /* 1 page at a time */ #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 ) errval sdgetdisklabel __P((unsigned char unit)); errval sd_get_parms __P((int unit, int flags)); void sdstrategy __P((struct buf *)); void sdstart __P((u_int32)); struct scsi_device sd_switch = { NULL, /* Use default error handler */ sdstart, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ "sd", 0, { 0, 0 } }; struct sd_data { u_int32 flags; #define SDINIT 0x04 /* device has been init'd */ #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_link *sc_link; /* contains our targ, lun etc. */ u_int32 ad_info; /* info about the adapter */ u_int32 cmdscount; /* cmds allowed outstanding by board */ boolean wlabel; /* label is writable */ struct disk_parms { u_char heads; /* Number of heads */ u_int16 cyls; /* Number of cylinders */ u_char sectors; /*dubious *//* Number of sectors/track */ u_int16 secsiz; /* Number of bytes/sector */ u_int32 disksize; /* total number sectors */ } params; struct disklabel disklabel; #ifdef NetBSD struct cpu_disklabel cpudisklabel; #else struct dos_partition dosparts[NDOSPART]; /* DOS view of disk */ #endif /* NetBSD */ u_int32 partflags[MAXPARTITIONS]; /* per partition flags */ #define SDOPEN 0x01 u_int32 openparts; /* one bit for each open partition */ u_int32 sd_start_of_unix; /* unix vs dos partitions */ struct buf buf_queue; u_int32 xfer_block_wait; } *sd_data[NSD]; static u_int32 next_sd_unit = 0; static struct scsi_xfer sx; /* * The routine called by the low level scsi routine when it discovers * a device suitable for this driver. */ errval sdattach(sc_link) struct scsi_link *sc_link; { u_int32 unit; struct sd_data *sd; struct disk_parms *dp; unit = next_sd_unit++; SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: ")); /* * 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_link = sc_link; sc_link->device = &sd_switch; sc_link->dev_unit = unit; if (sd->sc_link->adapter->adapter_info) { sd->ad_info = ((*(sd->sc_link->adapter->adapter_info)) (sc_link->adapter_unit)); sd->cmdscount = sd->ad_info & AD_INF_MAX_CMDS; if (sd->cmdscount > SDOUTSTANDING) { sd->cmdscount = SDOUTSTANDING; } } else { sd->ad_info = 1; sd->cmdscount = 1; } sc_link->opennings = sd->cmdscount; /* * 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 0; } /* * open the device. Make sure the partition info is a up-to-date as can be. */ errval sdopen(dev) int dev; /* XXX should be dev_t, but avoid promotion problems for now */ { errval errcode = 0; u_int32 unit, part; struct sd_data *sd; struct scsi_link *sc_link; unit = UNIT(dev); part = PARTITION(dev); sd = sd_data[unit]; /* * 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) || (!(sd->flags & SDINIT))) { return (ENXIO); } sc_link = sd->sc_link; SC_DEBUG(sc_link, SDEV_DB1, ("sdopen: dev=0x%x (unit %d (of %d),partition %d)\n" ,dev, unit, NSD, part)); /* * "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. */ scsi_test_unit_ready(sc_link, 0); /* * If it's been invalidated, then forget the label */ sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */ if (!(sc_link->flags & SDEV_MEDIA_LOADED)) { sd->flags &= ~SDHAVELABEL; /* * If somebody still has it open, then forbid re-entry. */ if (sd->openparts) { errcode = ENXIO; goto bad; } } /* * In case it is a funny one, tell it to start * not needed for most hard drives (ignore failure) */ scsi_start_unit(sc_link, SCSI_ERR_OK | SCSI_SILENT); /* * Check that it is still responding and ok. */ if (scsi_test_unit_ready(sc_link, 0)) { SC_DEBUG(sc_link, SDEV_DB3, ("device not reponding\n")); errcode = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("device ok\n")); /* * Load the physical device parameters */ sd_get_parms(unit, 0); /* sets SDEV_MEDIA_LOADED */ 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("sd"); errcode = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); /* Lock the pack in. */ scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT); /* * Load the partition info if not already loaded. */ if ((errcode = sdgetdisklabel(unit)) && (part != RAW_PART)) { goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); /* * Check the partition is legal */ if (part >= MAXPARTITIONS) { errcode = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("partition ok")); /* * Check that the partition exists */ if ((sd->disklabel.d_partitions[part].p_size == 0) && (part != RAW_PART)) { errcode = ENXIO; goto bad; } sd->partflags[part] |= SDOPEN; sd->openparts |= (1 << part); SC_DEBUG(sc_link, SDEV_DB3, ("open %d %d\n", sdstrats, sdqueues)); return 0; bad: if (!(sd->openparts)) { scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT); sc_link->flags &= ~SDEV_OPEN; } return errcode; } /* * close the device.. only called if we are the LAST occurence of an open * device. Convenient now but usually a pain. */ errval sdclose(dev) dev_t dev; { unsigned char unit, part; struct sd_data *sd; unit = UNIT(dev); part = PARTITION(dev); sd = sd_data[unit]; sd->partflags[part] &= ~SDOPEN; sd->openparts &= ~(1 << part); scsi_prevent(sd->sc_link, PR_ALLOW, SCSI_SILENT | SCSI_ERR_OK); if (!(sd->openparts)) sd->sc_link->flags &= ~SDEV_OPEN; return 0; } /* * 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_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. */ void sdstrategy(bp) struct buf *bp; { struct buf *dp; u_int32 opri; struct sd_data *sd; u_int32 unit; sdstrats++; unit = UNIT((bp->b_dev)); sd = sd_data[unit]; SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); SC_DEBUG(sd->sc_link, SDEV_DB1, (" %d bytes @ blk%d\n", bp->b_bcount, bp->b_blkno)); sdminphys(bp); /* * If the device has been made invalid, error out */ if (!(sd->sc_link->flags & SDEV_MEDIA_LOADED)) { sd->flags &= ~SDHAVELABEL; 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; /* * 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 /*0*/; 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 /*0*/; } /* * 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 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 (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 scsi_done */ void sdstart(unit) u_int32 unit; { register struct sd_data *sd = sd_data[unit]; register struct scsi_link *sc_link = sd->sc_link; struct buf *bp = 0; struct buf *dp; struct scsi_rw_big cmd; u_int32 blkno, nblk; struct partition *p; SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); /* * Check if the device has room for another command */ while (sc_link->opennings) { /* * 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 (sc_link->flags & SDEV_WAITING) { return; } /* * See if there is a buf with work for us to do.. */ dp = &sd->buf_queue; 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 (!(sc_link->flags & SDEV_MEDIA_LOADED)) { sd->flags &= ~SDHAVELABEL; 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 & 0xff000000UL) >> 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 (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &cmd, sizeof(cmd), (u_char *) bp->b_un.b_addr, bp->b_bcount, SD_RETRIES, 10000, bp, SCSI_NOSLEEP | ((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT)) == SUCCESSFULLY_QUEUED) { sdqueues++; } else { bad: printf("sd%d: oops not queued", unit); bp->b_error = EIO; bp->b_flags |= B_ERROR; biodone(bp); } } } /* * Perform special action on behalf of the user * Knows about the internals of this device */ errval sdioctl(dev_t dev, int cmd, caddr_t addr, int flag) { /* struct sd_cmd_buf *args; */ errval error = 0; 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]; SC_DEBUG(sd->sc_link, SDEV_DB1, ("sdioctl (0x%x)", cmd)); /* * If the device is not valid.. abandon ship */ if (!(sd->sc_link->flags & SDEV_MEDIA_LOADED)) 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, #ifdef NetBSD &sd->cpudisklabel #else sd->dosparts #endif ); if (error == 0) { sd->flags |= SDHAVELABEL; } break; case DIOCWLABEL: sd->flags &= ~SDWRITEPROT; if ((flag & FWRITE) == 0) error = EBADF; else sd->wlabel = *(boolean *) addr; break; case DIOCWDINFO: sd->flags &= ~SDWRITEPROT; if ((flag & FWRITE) == 0) error = EBADF; else { error = setdisklabel(&sd->disklabel, (struct disklabel *)addr, /*(sd->flags & SDHAVELABEL) ? sd->openparts : */ 0, #ifdef NetBSD &sd->cpudisklabel #else sd->dosparts #endif ); if (!error) { boolean wlab; /* ok - write will succeed */ sd->flags |= SDHAVELABEL; /* simulate opening partition 0 so write succeeds */ sd->openparts |= (1 << 0); /* XXX */ wlab = sd->wlabel; sd->wlabel = 1; error = writedisklabel(dev, sdstrategy, &sd->disklabel, #ifdef NetBSD &sd->cpudisklabel #else sd->dosparts #endif ); sd->wlabel = wlab; } } break; default: if (part == RAW_PART) error = scsi_do_ioctl(sd->sc_link, cmd, addr, flag); else error = ENOTTY; break; } return error; } /* * Load the label information on the named device */ errval sdgetdisklabel(unsigned char unit) { char *errstring; 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 = SECSIZE; /* 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 << UNITSHIFT) + 3), sdstrategy, &sd->disklabel, #ifdef NetBSD &sd->cpudisklabel #else sd->dosparts, 0, 0 #endif )) { 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 */ u_int32 sd_size(unit, flags) int unit, flags; { struct scsi_read_cap_data rdcap; struct scsi_read_capacity scsi_cmd; u_int32 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 (scsi_scsi_cmd(sd_data[unit]->sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) & rdcap, sizeof(rdcap), SD_RETRIES, 2000, 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); } /* * Tell the device to map out a defective block */ errval sd_reassign_blocks(unit, block) int 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 (scsi_scsi_cmd(sd_data[unit]->sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) & rbdata, sizeof(rbdata), SD_RETRIES, 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. */ errval sd_get_parms(unit, flags) int 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; u_int32 sectors; /* * First check if we have it all loaded */ if (sd->sc_link->flags & SDEV_MEDIA_LOADED) return 0; /* * 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 (scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) & scsi_sense, sizeof(scsi_sense), SD_RETRIES, 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 { SC_DEBUG(sd->sc_link, SDEV_DB3, ("%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))); /* * 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->sc_link->flags |= SDEV_MEDIA_LOADED; return 0; } int sdsize(dev_t dev) { u_int32 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) return -1; } if (sd->flags & SDWRITEPROT) return -1; return (int)sd->disklabel.d_partitions[part].p_size; } /* * dump all of physical memory into the partition specified, starting * at offset 'dumplo' into the partition. */ errval sddump(dev_t dev) { /* dump core after a system crash */ register struct sd_data *sd; /* disk unit to do the IO */ int32 num; /* number of sectors to write */ u_int32 unit, part; int32 blkoff, blknum, blkcnt = MAXTRANSFER; int32 nblocks; char *addr; struct scsi_rw_big cmd; extern int Maxmem; static int sddoingadump = 0; extern caddr_t CADDR1; /* map the page we are about to write, here */ extern struct pte *CMAP1; struct scsi_xfer *xs = &sx; errval retval; int c; addr = (char *) 0; /* starting address */ /* toss any characters present prior to dump */ while ((c = sgetc(1)) && (c != 0x100)); /*syscons and pccons differ */ /* 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); sd = sd_data[unit]; if (!sd) return (ENXIO); /* was it ever initialized etc. ? */ if (!(sd->flags & SDINIT)) return (ENXIO); if (sd->sc_link->flags & SDEV_MEDIA_LOADED != SDEV_MEDIA_LOADED) return (ENXIO); if (sd->flags & SDWRITEPROT) return (ENXIO); /* Convert to disk sectors */ num = (u_int32) 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) { *(int *)CMAP1 = PG_V | PG_KW | ((unsigned long)addr >> PG_SHIFT); tlbflush(); /* * 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 * don't use scsi_scsi_cmd() as it may want * to wait for an xs. */ bzero(xs, sizeof(sx)); xs->flags |= SCSI_NOMASK | SCSI_NOSLEEP | INUSE; xs->sc_link = sd->sc_link; 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->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_link->adapter->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! */ } if ((unsigned) addr % (1024 * 1024) == 0) printf("%d ", num / 2048); /* update block count */ num -= blkcnt; blknum += blkcnt; (int) addr += 512 * blkcnt; /* operator aborting dump? */ if ((c = sgetc(1)) && (c != 0x100)) return (EINTR); } return (0); }