/* $NetBSD: sd.c,v 1.34.2.1 1994/07/26 19:55:20 cgd Exp $ */ /* * Copyright (c) 1994 Charles Hannum. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Originally written by Julian Elischer (julian@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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB int Debugger(); #else /* DDB */ #define Debugger() #endif /* DDB */ #define SDOUTSTANDING 2 #define SDRETRIES 4 #define SDUNIT(dev) (minor(dev) / MAXPARTITIONS) #define SDPART(dev) (minor(dev) % MAXPARTITIONS) #define makesddev(maj, unit, part) \ (makedev((maj), ((unit) * MAXPARTITIONS) + (part))) #ifndef RAW_PART #define RAW_PART 3 /* XXX should be 2 */ #endif #define SDLABELDEV(dev) (makesddev(major(dev), SDUNIT(dev), RAW_PART)) struct sd_data { struct device sc_dev; struct dkdevice sc_dk; int flags; #define SDHAVELABEL 0x01 /* have read the label */ #define SDDOSPART 0x02 /* Have read the DOS partition table */ #define SDWRITEPROT 0x04 /* 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; /* Number of sectors/track */ u_int32 blksize; /* Number of bytes/sector */ u_long disksize; /* total number sectors */ } params; int partflags[MAXPARTITIONS]; /* per partition flags */ #define SDOPEN 0x01 u_int32 openparts; /* one bit for each open partition */ u_int32 xfer_block_wait; struct buf buf_queue; }; void sdattach __P((struct device *, struct device *, void *)); struct cfdriver sdcd = { NULL, "sd", scsi_targmatch, sdattach, DV_DISK, sizeof(struct sd_data) }; int sdgetdisklabel __P((struct sd_data *)); int sd_get_parms __P((struct sd_data *, int)); void sdstrategy __P((struct buf *)); void sdstart __P((int)); struct dkdriver sddkdriver = { sdstrategy }; 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 }; /* * The routine called by the low level scsi routine when it discovers * a device suitable for this driver. */ void sdattach(parent, self, aux) struct device *parent, *self; void *aux; { struct sd_data *sd = (void *)self; struct disk_parms *dp = &sd->params; struct scsi_link *sc_link = aux; SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: ")); /* * Store information needed to contact our base driver */ sd->sc_link = sc_link; sc_link->device = &sd_switch; sc_link->dev_unit = self->dv_unit; sd->sc_dk.dk_driver = &sddkdriver; #if !defined(i386) || defined(NEWCONFIG) dk_establish(&sd->sc_dk, &sd->sc_dev); #endif if (sd->sc_link->adapter->adapter_info) { sd->ad_info = ((*(sd->sc_link->adapter->adapter_info)) (sc_link->adapter_softc)); 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(sd, SCSI_NOSLEEP | SCSI_NOMASK); printf(": %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", dp->disksize / ((1024L * 1024L) / dp->blksize), dp->cyls, dp->heads, dp->sectors, dp->blksize); } /* * open the device. Make sure the partition info is a up-to-date as can be. */ int sdopen(dev) dev_t dev; { int error = 0; int unit, part; struct sd_data *sd; struct scsi_link *sc_link; unit = SDUNIT(dev); part = SDPART(dev); if (unit >= sdcd.cd_ndevs) return ENXIO; sd = sdcd.cd_devs[unit]; if (!sd) 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, sdcd.cd_ndevs, part)); /* * If it's been invalidated, then forget the label */ if (!(sc_link->flags & SDEV_MEDIA_LOADED)) { sd->flags &= ~SDHAVELABEL; /* * If somebody still has it open, then forbid re-entry. */ if (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. */ scsi_test_unit_ready(sc_link, SCSI_SILENT); /* * In case it is a funny one, tell it to start * not needed for most hard drives (ignore failure) */ scsi_start(sc_link, SSS_START, SCSI_ERR_OK | SCSI_SILENT); /* * Check that it is still responding and ok. */ sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */ if (scsi_test_unit_ready(sc_link, 0)) { SC_DEBUG(sc_link, SDEV_DB3, ("device not reponding\n")); error = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("device ok\n")); /* Lock the pack in. */ scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT); /* * Load the physical device parameters */ if (sd_get_parms(sd, 0)) { error = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); /* * Load the partition info if not already loaded. */ if ((error = sdgetdisklabel(sd)) && (part != RAW_PART)) goto bad; SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); /* * Check the partition is legal */ if (part >= sd->sc_dk.dk_label.d_npartitions && part != RAW_PART) { error = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("partition ok")); /* * Check that the partition exists */ if (sd->sc_dk.dk_label.d_partitions[part].p_fstype == FS_UNUSED && part != RAW_PART) { error = ENXIO; goto bad; } sd->partflags[part] |= SDOPEN; sd->openparts |= (1 << part); SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); sc_link->flags |= SDEV_MEDIA_LOADED; return 0; bad: if (!sd->openparts) { scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT); sc_link->flags &= ~SDEV_OPEN; } return error; } /* * close the device.. only called if we are the LAST occurence of an open * device. Convenient now but usually a pain. */ int sdclose(dev) dev_t dev; { int unit, part; struct sd_data *sd; unit = SDUNIT(dev); part = SDPART(dev); sd = sdcd.cd_devs[unit]; sd->partflags[part] &= ~SDOPEN; sd->openparts &= ~(1 << part); if (!sd->openparts) { scsi_prevent(sd->sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT); 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; { register struct sd_data *sd = sdcd.cd_devs[SDUNIT(bp->b_dev)]; (sd->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; int opri; struct sd_data *sd; int unit; unit = SDUNIT(bp->b_dev); sd = sdcd.cd_devs[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 (SDPART(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->sc_dk.dk_label, sd->wlabel) <= 0) goto done; /* otherwise, process transfer request */ } opri = splbio(); 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; bad: bp->b_flags |= B_ERROR; done: /* * Correctly set the buf to indicate a completed xfer */ bp->b_resid = bp->b_bcount; biodone(bp); } /* * 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 splbio from sdstrategy and scsi_done */ void sdstart(unit) int unit; { register struct sd_data *sd = sdcd.cd_devs[unit]; register struct scsi_link *sc_link = sd->sc_link; struct buf *bp = 0; struct buf *dp; struct scsi_rw_big cmd; int blkno, nblks; 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) { sc_link->flags &= ~SDEV_WAITING; wakeup((caddr_t)sc_link); 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->b_actf; /* * 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; bp->b_error = EIO; bp->b_flags |= B_ERROR; biodone(bp); continue; } /* * We have a buf, now we know we are going to go through * With this thing.. * * First, translate the block to absolute */ blkno = bp->b_blkno / (sd->params.blksize / DEV_BSIZE); if (SDPART(bp->b_dev) != RAW_PART) { p = &sd->sc_dk.dk_label.d_partitions[SDPART(bp->b_dev)]; blkno += p->p_offset; } nblks = (bp->b_bcount + (sd->params.blksize - 1)) / sd->params.blksize; /* * 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 = (nblks & 0xff00) >> 8; cmd.length1 = (nblks & 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_data, bp->b_bcount, SDRETRIES, 10000, bp, SCSI_NOSLEEP | ((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT)) != SUCCESSFULLY_QUEUED) printf("%s: not queued", sd->sc_dev.dv_xname); } } /* * Perform special action on behalf of the user * Knows about the internals of this device */ int sdioctl(dev, cmd, addr, flag) dev_t dev; int cmd; caddr_t addr; int flag; { int error = 0; int unit, part; register struct sd_data *sd; /* * Find the device that the user is talking about */ unit = SDUNIT(dev); part = SDPART(dev); sd = sdcd.cd_devs[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: return EINVAL; case DIOCGDINFO: *(struct disklabel *) addr = sd->sc_dk.dk_label; return 0; case DIOCGPART: ((struct partinfo *) addr)->disklab = &sd->sc_dk.dk_label; ((struct partinfo *) addr)->part = &sd->sc_dk.dk_label.d_partitions[SDPART(dev)]; return 0; case DIOCSDINFO: if ((flag & FWRITE) == 0) return EBADF; error = setdisklabel(&sd->sc_dk.dk_label, (struct disklabel *) addr, 0, &sd->sc_dk.dk_cpulabel); /*(sd->flags & DKFL_BSDLABEL) ? sd->openparts : 0*/ if (!error) sd->flags |= SDHAVELABEL; return error; case DIOCWLABEL: sd->flags &= ~SDWRITEPROT; if ((flag & FWRITE) == 0) return EBADF; sd->wlabel = *(boolean *) addr; return 0; case DIOCWDINFO: sd->flags &= ~SDWRITEPROT; if ((flag & FWRITE) == 0) return EBADF; error = setdisklabel(&sd->sc_dk.dk_label, (struct disklabel *) addr, 0, &sd->sc_dk.dk_cpulabel); /*(sd->flags & SDHAVELABEL) ? sd->openparts : 0*/ if (error) return error; { boolean wlab; /* ok - write will succeed */ sd->flags |= SDHAVELABEL; /* simulate opening partition 0 so write succeeds */ sd->openparts |= (1 << 0); /* XXXX */ wlab = sd->wlabel; sd->wlabel = 1; error = writedisklabel(SDLABELDEV(dev), sdstrategy, &sd->sc_dk.dk_label, &sd->sc_dk.dk_cpulabel); sd->wlabel = wlab; return error; } default: if (part != RAW_PART) return ENOTTY; return scsi_do_ioctl(sd->sc_link, cmd, addr, flag); } #ifdef DIAGNOSTIC panic("sdioctl: impossible"); #endif } /* * Load the label information on the named device */ int sdgetdisklabel(sd) struct sd_data *sd; { char *errstring; /* * If the inflo is already loaded, use it */ if (sd->flags & SDHAVELABEL) return 0; bzero(&sd->sc_dk.dk_label, sizeof(struct disklabel)); bzero(&sd->sc_dk.dk_cpulabel, sizeof(struct cpu_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->sc_dk.dk_label.d_partitions[0].p_offset = 0; sd->sc_dk.dk_label.d_partitions[0].p_size = sd->params.disksize * (sd->params.blksize / DEV_BSIZE); sd->sc_dk.dk_label.d_partitions[0].p_fstype = 9; /* XXXX */ sd->sc_dk.dk_label.d_partitions[RAW_PART].p_offset = 0; sd->sc_dk.dk_label.d_partitions[RAW_PART].p_size = sd->params.disksize * (sd->params.blksize / DEV_BSIZE); sd->sc_dk.dk_label.d_npartitions = MAXPARTITIONS; sd->sc_dk.dk_label.d_secsize = sd->params.blksize; sd->sc_dk.dk_label.d_ntracks = sd->params.heads; sd->sc_dk.dk_label.d_nsectors = sd->params.sectors; sd->sc_dk.dk_label.d_ncylinders = sd->params.cyls; sd->sc_dk.dk_label.d_secpercyl = sd->params.heads * sd->params.sectors; if (sd->sc_dk.dk_label.d_secpercyl == 0) { sd->sc_dk.dk_label.d_secpercyl = 100; /* as long as it's not 0 - readdisklabel divides by it (?) */ } /* * Call the generic disklabel extraction routine */ if (errstring = readdisklabel(makesddev(0, sd->sc_dev.dv_unit, RAW_PART), sdstrategy, &sd->sc_dk.dk_label, &sd->sc_dk.dk_cpulabel)) { printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); return ENXIO; } sd->flags |= SDHAVELABEL; /* WE HAVE IT ALL NOW */ return 0; } /* * Find out from the device what it's capacity is */ u_int32 sd_size(sd, flags) struct sd_data *sd; int 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->sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) &rdcap, sizeof(rdcap), SDRETRIES, 2000, NULL, flags | SCSI_DATA_IN) != 0) { printf("%s: could not get size\n", sd->sc_dev.dv_xname); return 0; } else { size = (rdcap.addr_3 << 24) + (rdcap.addr_2 << 16) + (rdcap.addr_1 << 8) + rdcap.addr_0 + 1; } return size; } /* * Tell the device to map out a defective block */ int sd_reassign_blocks(sd, block) struct sd_data *sd; int 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->sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) &rbdata, sizeof(rbdata), SDRETRIES, 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(sd, flags) struct sd_data *sd; int flags; { 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), SDRETRIES, 6000, NULL, flags | SCSI_DATA_IN) != 0) { printf("%s: could not mode sense (4)", sd->sc_dev.dv_xname); fake_it: 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(sd, flags); disk_parms->heads = 64; disk_parms->sectors = 32; disk_parms->cyls = sectors / (64 * 32); disk_parms->blksize = 512; 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->blksize = _3btol(scsi_sense.blk_desc.blklen); if (!disk_parms->heads || !disk_parms->cyls || !disk_parms->blksize) { printf("%s: mode sense (4) returned nonsense", sd->sc_dev.dv_xname); goto fake_it; } sectors = sd_size(sd, flags); disk_parms->disksize = sectors; sectors /= (disk_parms->heads * disk_parms->cyls); disk_parms->sectors = sectors; /* XXX dubious on SCSI */ } sd->sc_link->flags |= SDEV_MEDIA_LOADED; return 0; } int sdsize(dev_t dev) { int unit = SDUNIT(dev), part = SDPART(dev), val; struct sd_data *sd; if (unit >= sdcd.cd_ndevs) return -1; sd = sdcd.cd_devs[unit]; if (!sd) return -1; if ((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 sd->sc_dk.dk_label.d_partitions[part].p_size; } #define SCSIDUMP 1 #undef SCSIDUMP #define NOT_TRUSTED 1 #ifdef SCSIDUMP #include static struct scsi_xfer sx; #define MAXTRANSFER 8 /* 1 page at a time */ /* * dump all of physical memory into the partition specified, starting * at offset 'dumplo' into the partition. */ int 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; #define MAPTO CADDR1 extern caddr_t MAPTO; /* map the page we are about to write, here */ struct scsi_xfer *xs = &sx; int 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 = SDUNIT(dev); /* eventually support floppies? */ part = SDPART(dev); /* file system */ /* check for acceptable drive number */ if (unit >= sdcd.cd_ndevs) return ENXIO; sd = sd_data[unit]; if (!sd) 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->sc_dk.dk_label.d_secsize; /* check if controller active */ if (sddoingadump) return EFAULT; nblocks = sd->sc_dk.dk_label.d_partitions[part].p_size; blkoff = sd->sc_dk.dk_label.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) { pmap_enter(kernel_pmap, MAPTO, 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 * 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 = SDRETRIES; 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 *) MAPTO; 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! */ } #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 -= blkcnt; blknum += blkcnt; (int) addr += 512 * blkcnt; /* operator aborting dump? */ if ((c = sgetc(1)) && (c != 0x100)) return EINTR; } return 0; } #else /* SCSIDUMP */ int sddump() { printf("\nsddump() -- not implemented\n"); delay(60000000); /* 60 seconds */ return -1; } #endif /* SCSIDUMP */