/* * Copyright (c) 1995,1996 Shunsuke Akiyama. 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 Shunsuke Akiyama. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Shunsuke Akiyama AND CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL Shunsuke Akiyama OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * $Id: od.c,v 1.21 1996/08/17 20:50:26 joerg Exp $ */ /* * Compile option defines: */ /* * If drive returns sense key as 0x02 with vendor specific additional * sense code (ASC) and additional sense code qualifier (ASCQ), or * illegal ASC and ASCQ. This cause an error (NOT READY) and retrying. * To suppress this, uncomment following. * Or put "options OD_BOGUS_NOT_READY" entry into your kernel * configuration file. * #define OD_BOGUS_NOT_READY */ /* * For an automatic spindown, try this. Again, preferrably as an * option in your config file. * WARNING! Use at your own risk. Joerg's ancient SONY SMO drive * groks it fine, while Shunsuke's Fujitsu chokes on it and times * out. #define OD_AUTO_TURNOFF */ #include "opt_bounce.h" #include "opt_scsi.h" #include "opt_od.h" #define SPLOD splbio #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEVFS #include #endif /*DEVFS*/ #include #include #include #include #include #include static u_int32_t odstrats, odqueues; #define SECSIZE 512 /* default sector size */ #define ODOUTSTANDING 4 #define OD_RETRIES 4 #define PARTITION(dev) dkpart(dev) #define ODUNIT(dev) dkunit(dev) /* XXX introduce a dkmodunit() macro for this. */ #define ODSETUNIT(DEV, U) \ makedev(major(DEV), dkmakeminor((U), dkslice(DEV), dkpart(DEV))) struct scsi_data { u_int32_t flags; #define ODINIT 0x04 /* device has been init'd */ struct disk_parms { u_char heads; /* Number of heads */ u_int16_t cyls; /* Number of cylinders (ficticous) */ u_int16_t sectors; /* Number of sectors/track */ u_int16_t secsiz; /* Number of bytes/sector */ u_int32_t disksize; /* total number sectors */ u_int16_t rpm; /* medium rotation rate */ } params; struct diskslices *dk_slices; /* virtual drives */ struct buf_queue_head buf_queue; int dkunit; /* disk stats unit number */ #ifdef DEVFS /* Eventually move all these to common disk struct. */ void *b_devfs_token; void *c_devfs_token; void *ctl_devfs_token; #endif }; static errval od_get_parms __P((int unit, int flags)); #ifdef notyet static errval od_reassign_blocks __P((int unit, int block)); #endif static u_int32_t od_size __P((int unit, int flags)); static int od_sense_handler __P((struct scsi_xfer *)); static void odstart __P((u_int32_t, u_int32_t)); static void odstrategy1 __P((struct buf *)); static dev_t odsetunit(dev_t dev, int unit) { return ODSETUNIT(dev, unit); } static int odunit(dev_t dev) { return ODUNIT(dev); } static errval od_open __P((dev_t dev, int mode, int fmt, struct proc *p, struct scsi_link *sc_link)); static errval od_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, struct scsi_link *sc_link); static errval od_close __P((dev_t dev, int fflag, int fmt, struct proc *p, struct scsi_link *sc_link)); static void od_strategy(struct buf *bp, struct scsi_link *sc_link); static d_open_t odopen; static d_close_t odclose; static d_ioctl_t odioctl; static d_strategy_t odstrategy; #define CDEV_MAJOR 70 #define BDEV_MAJOR 20 static struct cdevsw od_cdevsw; static struct bdevsw od_bdevsw = { odopen, odclose, odstrategy, odioctl, /*20*/ nodump, nopsize, 0, "od", &od_cdevsw, -1 }; /* * Actually include the interface routines */ SCSI_DEVICE_ENTRIES(od) static struct scsi_device od_switch = { od_sense_handler, odstart, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ "od", 0, {0, 0}, 0, /* Link flags */ odattach, "Optical", odopen, sizeof(struct scsi_data), T_OPTICAL, odunit, odsetunit, od_open, od_ioctl, od_close, od_strategy, }; static inline void od_registerdev(int unit) { if(dk_ndrive < DK_NDRIVE) { sprintf(dk_names[dk_ndrive], "od%d", unit); dk_wpms[dk_ndrive] = (4*1024*1024/2); /* 4MB/sec */ SCSI_DATA(&od_switch, unit)->dkunit = dk_ndrive++; } else { SCSI_DATA(&od_switch, unit)->dkunit = -1; } } /* * The routine called by the low level scsi routine when it discovers * a device suitable for this driver. */ static errval odattach(struct scsi_link *sc_link) { u_int32_t unit; struct disk_parms *dp; #ifdef DEVFS int mynor; #endif struct scsi_data *od = sc_link->sd; unit = sc_link->dev_unit; dp = &(od->params); if (sc_link->opennings > ODOUTSTANDING) sc_link->opennings = ODOUTSTANDING; TAILQ_INIT(&od->buf_queue); /* * Use the subdriver to request information regarding * the drive. We cannot use interrupts yet, so the * request must specify this. */ scsi_start_unit(sc_link, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_ERR_OK | SCSI_SILENT); od_get_parms(unit, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT); /* * if we don't have actual parameters, assume 512 bytes/sec * (could happen on removable media - MOD) * -- this avoids the division below from falling over */ if(dp->secsiz == 0) dp->secsiz = SECSIZE; if (dp->disksize != 0) { printf("%ldMB (%ld %d byte sectors)", dp->disksize / ((1024L * 1024L) / dp->secsiz), dp->disksize, dp->secsiz); } else { printf("od not present"); } #ifndef SCSI_REPORT_GEOMETRY if ( (sc_link->flags & SDEV_BOOTVERBOSE) ) #endif { sc_print_addr(sc_link); printf("with approximate %d cyls, %d heads, and %d sectors/track", dp->cyls, dp->heads, dp->sectors); } #ifdef OD_AUTO_TURNOFF scsi_stop_unit(sc_link, 0, SCSI_ERR_OK | SCSI_SILENT); #endif /* OD_AUTO_TURNOFF */ od->flags |= ODINIT; od_registerdev(unit); #ifdef DEVFS mynor = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART); od->b_devfs_token = devfs_add_devswf(&od_bdevsw, mynor, DV_BLK, UID_ROOT, GID_OPERATOR, 0640, "od%d", unit); od->c_devfs_token = devfs_add_devswf(&od_cdevsw, mynor, DV_CHR, UID_ROOT, GID_OPERATOR, 0640, "rod%d", unit); mynor = dkmakeminor(unit, 0, 0); /* XXX */ od->ctl_devfs_token = devfs_add_devswf(&od_cdevsw, mynor | SCSI_CONTROL_MASK, DV_CHR, UID_ROOT, GID_WHEEL, 0600, "rod%d.ctl", unit); #endif return 0; } /* * open the device. Make sure the partition info is a up-to-date as can be. */ static errval od_open(dev, mode, fmt, p, sc_link) dev_t dev; int mode; int fmt; struct proc *p; struct scsi_link *sc_link; { errval errcode = 0; u_int32_t unit; struct disklabel label; struct scsi_data *od; unit = ODUNIT(dev); od = sc_link->sd; /* * Make sure the disk has been initialized * At some point in the future, get the scsi driver * to look for a new device if we are not initted */ if ((!od) || (!(od->flags & ODINIT))) { return ENXIO; } SC_DEBUG(sc_link, SDEV_DB1, ("od_open: dev=0x%lx (unit %ld, partition %d)\n", dev, unit, PARTITION(dev))); /* * Try to start the drive (ignore failure). */ scsi_start_unit(sc_link, SCSI_ERR_OK | SCSI_SILENT); scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT); /* * Try to clear "Unit Attention" condition, when media had * been changed before. * This operation also clears the SDEV_MEDIA_LOADED flag in its * error handling routine. */ scsi_test_unit_ready(sc_link, SCSI_SILENT); SC_DEBUG(sc_link, SDEV_DB3, ("'start' attempted ")); sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */ /* * If it's been invalidated, then forget the label. */ if (!(sc_link->flags & SDEV_MEDIA_LOADED)) { /* * If somebody still has it open, then forbid re-entry. */ if (dsisopen(od->dk_slices)) { errcode = ENXIO; goto bad; } if (od->dk_slices != NULL) dsgone(&od->dk_slices); } /* * This time actually take notice of error returns */ if (scsi_test_unit_ready(sc_link, SCSI_SILENT) != 0) { SC_DEBUG(sc_link, SDEV_DB3, ("not ready\n")); errcode = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("device present\n")); /* * Load the physical device parameters */ errcode = od_get_parms(unit, 0); /* sets SDEV_MEDIA_LOADED */ if (errcode) { goto bad; } switch (od->params.secsiz) { case SECSIZE : case 1024 : #ifdef notyet case 2048 : #endif break; default : printf("od%ld: Can't deal with %d bytes logical blocks\n", unit, od->params.secsiz); Debugger("od"); errcode = ENXIO; goto bad; } SC_DEBUG(sc_link, SDEV_DB3, ("params loaded ")); /* Build label for whole disk. */ bzero(&label, sizeof label); label.d_secsize = od->params.secsiz; label.d_nsectors = od->params.sectors; label.d_ntracks = od->params.heads; label.d_ncylinders = od->params.cyls; label.d_secpercyl = od->params.heads * od->params.sectors; label.d_rpm = od->params.rpm; /* maybe wrong */ if (label.d_secpercyl == 0) label.d_secpercyl = 64*32; /* XXX as long as it's not 0 * - readdisklabel divides by it (?) */ label.d_secperunit = od->params.disksize; /* Initialize slice tables. */ errcode = dsopen("od", dev, fmt, &od->dk_slices, &label, odstrategy1, (ds_setgeom_t *)NULL, &od_bdevsw, &od_cdevsw); if (errcode != 0) goto bad; SC_DEBUG(sc_link, SDEV_DB3, ("Slice tables initialized ")); SC_DEBUG(sc_link, SDEV_DB3, ("open %ld %ld\n", odstrats, odqueues)); return 0; bad: if (!dsisopen(od->dk_slices)) { scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT); #ifdef OD_AUTO_TURNOFF scsi_stop_unit(sc_link, 0, SCSI_ERR_OK | SCSI_SILENT); #endif /* OD_AUTO_TURNOFF */ 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. */ static errval od_close(dev, fflag, fmt, p, sc_link) dev_t dev; int fflag; int fmt; struct proc *p; struct scsi_link *sc_link; { struct scsi_data *od; od = sc_link->sd; dsclose(dev, fmt, od->dk_slices); if (!dsisopen(od->dk_slices)) { scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT | SCSI_ERR_OK); #ifdef OD_AUTO_TURNOFF scsi_stop_unit(sc_link, 0, SCSI_ERR_OK | SCSI_SILENT); #endif /* OD_AUTO_TURNOFF */ sc_link->flags &= ~SDEV_OPEN; } return 0; } /* * Actually translate the requested transfer into one the physical driver * can understand. The transfer is described by a buf and will include * only one physical transfer. */ static void od_strategy(struct buf *bp, struct scsi_link *sc_link) { u_int32_t opri; struct scsi_data *od; u_int32_t unit; odstrats++; unit = ODUNIT((bp->b_dev)); od = sc_link->sd; /* * If the device has been made invalid, error out */ if (!(sc_link->flags & SDEV_MEDIA_LOADED)) { bp->b_error = EIO; goto bad; } /* * Odd number of bytes or negative offset */ if (bp->b_blkno < 0 || bp->b_bcount % DEV_BSIZE != 0) { bp->b_error = EINVAL; goto bad; } /* * Do bounds checking, adjust transfer, set b_cylin and b_pbklno. */ if (dscheck(bp, od->dk_slices) <= 0) goto done; /* XXX check b_resid */ opri = SPLOD(); /* * Use a bounce buffer if necessary */ #ifdef BOUNCE_BUFFERS if (sc_link->flags & SDEV_BOUNCE) vm_bounce_alloc(bp); #endif /* * Place it in the queue of disk activities for this disk */ TAILQ_INSERT_TAIL(&od->buf_queue, bp, b_act); /* * Tell the device to get going on the transfer if it's * not doing anything, otherwise just wait for completion */ odstart(unit, 0); 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*/; } static void odstrategy1(struct buf *bp) { /* * XXX - do something to make odstrategy() but not this block while * we're doing dsinit() and dsioctl(). */ odstrategy(bp); } /* * odstart 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 (odstrategy) * * 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 * odstart() is called at SPLOD from odstrategy and scsi_done */ static void odstart(u_int32_t unit, u_int32_t flags) { register struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit); register struct scsi_data *od = sc_link->sd; struct buf *bp = 0; struct scsi_rw_big cmd; u_int32_t blkno, nblk; u_int32_t secsize; SC_DEBUG(sc_link, SDEV_DB2, ("odstart ")); /* * 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.. */ bp = od->buf_queue.tqh_first; if (bp == NULL) { /* yes, an assign */ return; } TAILQ_REMOVE( &od->buf_queue, bp, b_act); /* * 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)) { goto bad; } /* * We have a buf, now we know we are going to go through * With this thing.. */ secsize = od->params.secsiz; blkno = bp->b_pblkno / (secsize / DEV_BSIZE); if (bp->b_bcount & (secsize - 1)) { goto bad; } nblk = (bp->b_bcount + (secsize - 1)) / secsize; /* * Fill out the scsi command */ cmd.op_code = (bp->b_flags & B_READ) ? READ_BIG : WRITE_BIG; scsi_uto4b(blkno, &cmd.addr_3); scsi_uto2b(nblk, &cmd.length2); cmd.byte2 = cmd.reserved = cmd.control = 0; /* * 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, OD_RETRIES, 100000, bp, flags | ((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT)) == SUCCESSFULLY_QUEUED) { odqueues++; if(od->dkunit >= 0) { dk_xfer[od->dkunit]++; dk_seek[od->dkunit]++; /* don't know */ dk_wds[od->dkunit] += bp->b_bcount >> 6; } } else { bad: printf("od%ld: oops not queued\n", 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 */ static errval od_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, struct scsi_link *sc_link) { /* struct od_cmd_buf *args; */ errval error; struct scsi_data *od; /* * Find the device that the user is talking about */ od = sc_link->sd; SC_DEBUG(sc_link, SDEV_DB1, ("odioctl (0x%x)", cmd)); /* * If the device is not valid.. abandon ship */ if (!(sc_link->flags & SDEV_MEDIA_LOADED)) return EIO; switch (cmd) { case DIOCSBAD: error = EINVAL; break; case CDIOCEJECT: error = scsi_stop_unit(sc_link, 1, 0); sc_link->flags &= ~SDEV_MEDIA_LOADED; break; case CDIOCALLOW: error = scsi_prevent(sc_link, PR_ALLOW, 0); break; case CDIOCPREVENT: error = scsi_prevent(sc_link, PR_PREVENT, 0); break; default: error = dsioctl("od", dev, cmd, addr, flag, &od->dk_slices, odstrategy1, (ds_setgeom_t *)NULL); if (error == -1) { if (PARTITION(dev) != RAW_PART) { error = ENOTTY; } else { error = scsi_do_ioctl(dev, cmd, addr, flag, p, sc_link); } } break; } return error; } /* * Find out from the device what it's capacity is */ static u_int32_t od_size(unit, flags) int unit, flags; { struct scsi_read_cap_data rdcap; struct scsi_read_capacity rdcap_cmd; struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit); struct scsi_data *od = sc_link->sd; struct scsi_mode_sense mdsense_cmd; struct scsi_mode_sense_data { struct scsi_mode_header header; struct blk_desc blk_desc; union disk_pages pages; } scsi_sense; /* * make up a scsi command and ask the scsi driver to do * it for you. */ bzero(&rdcap_cmd, sizeof(rdcap_cmd)); rdcap_cmd.op_code = READ_CAPACITY; /* * If the command works, interpret the result as a 4 byte * number of blocks */ if (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &rdcap_cmd, sizeof(rdcap_cmd), (u_char *) & rdcap, sizeof(rdcap), OD_RETRIES, 10000, NULL, flags | SCSI_DATA_IN) != 0) { return 0; } else { od->params.disksize = scsi_4btou(&rdcap.addr_3) + 1; od->params.secsiz = scsi_4btou(&rdcap.length_3); } /* * do a "mode sense page 4" (rigid disk drive geometry) */ bzero(&mdsense_cmd, sizeof(mdsense_cmd)); mdsense_cmd.op_code = MODE_SENSE; mdsense_cmd.page = 4; mdsense_cmd.length = 0x20; /* * If the command worked, use the results to fill out * the parameter structure */ if (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &mdsense_cmd, sizeof(mdsense_cmd), (u_char *) & scsi_sense, sizeof(scsi_sense), OD_RETRIES, 10000, NULL, flags | SCSI_SILENT | SCSI_DATA_IN) != 0) { /* default to a ficticous geometry */ od->params.heads = 64; } else { SC_DEBUG(sc_link, SDEV_DB3, ("%ld cyls, %d heads, %d rpm\n", scsi_3btou(&scsi_sense.pages.rigid_geometry.ncyl_2), scsi_sense.pages.rigid_geometry.nheads, scsi_2btou(&scsi_sense.pages.rigid_geometry.medium_rot_rate_1))); od->params.heads = scsi_sense.pages.rigid_geometry.nheads; if (od->params.heads == 0) od->params.heads = 64; /* ficticous */ od->params.rpm = scsi_2btou(&scsi_sense.pages.rigid_geometry.medium_rot_rate_1); } /* * do a "mode sense page 3" (format device) */ bzero(&mdsense_cmd, sizeof(mdsense_cmd)); mdsense_cmd.op_code = MODE_SENSE; mdsense_cmd.page = 3; mdsense_cmd.length = 0x20; /* * If the command worked, use the results to fill out * the parameter structure */ if (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &mdsense_cmd, sizeof(mdsense_cmd), (u_char *) & scsi_sense, sizeof(scsi_sense), OD_RETRIES, 10000, NULL, flags | SCSI_SILENT | SCSI_DATA_IN) != 0) { /* default to a ficticous geometry */ od->params.sectors = 32; } else { SC_DEBUG(sc_link, SDEV_DB3, ("%d secs\n", scsi_2btou(&scsi_sense.pages.disk_format.ph_sec_t_1))); od->params.sectors = scsi_2btou(&scsi_sense.pages.disk_format.ph_sec_t_1); if (od->params.sectors == 0) od->params.sectors = 32; /* ficticous */ } return od->params.disksize; } #ifdef notyet /* * Tell the device to map out a defective block */ static errval od_reassign_blocks(unit, block) int unit, block; { struct scsi_reassign_blocks scsi_cmd; struct scsi_reassign_blocks_data rbdata; struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit); 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]); scsi_uto4b(block, &rbdata.defect_descriptor[0].dlbaddr_3); return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) & rbdata, sizeof(rbdata), OD_RETRIES, 20000, NULL, SCSI_DATA_OUT); } #endif /* * Get the scsi driver to send a full inquiry to the * device and use the results to fill out the disk * parameter structure. */ static errval od_get_parms(unit, flags) int unit, flags; { struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit); struct scsi_data *od = sc_link->sd; struct disk_parms *disk_parms = &od->params; u_int32_t sectors; errval retval; /* * First check if we have it all loaded */ if (sc_link->flags & SDEV_MEDIA_LOADED) return 0; /* * Use ficticious geometry, this depends on the size of medium. */ sectors = od_size(unit, flags); /* od_size() sets secsiz, disksize, sectors, and heads */ /* ficticous number of cylinders, so that C*H*S <= total */ if (disk_parms->sectors != 0 && disk_parms->heads != 0) { disk_parms->cyls = sectors / (disk_parms->sectors * disk_parms->heads); } else { disk_parms->cyls = 0; } if (sectors != 0) { sc_link->flags |= SDEV_MEDIA_LOADED; retval = 0; } else { retval = ENXIO; } return retval; } /* * sense handler: Called to determine what to do when the * device returns a CHECK CONDITION. */ static int od_sense_handler(struct scsi_xfer *xs) { struct scsi_sense_data *sense; struct scsi_sense_extended *ext; int asc, ascq; sense = &(xs->sense); ext = (struct scsi_sense_extended *)&(sense->ext.extended); /* I don't know what the heck to do with a deferred error, * so I'll just kick it back to the caller. */ if ((sense->error_code & SSD_ERRCODE) == 0x71) return SCSIRET_CONTINUE; #ifdef OD_BOGUS_NOT_READY if (((sense->error_code & SSD_ERRCODE) == 0x70) && ((sense->ext.extended.flags & SSD_KEY) == 0x02)) /* No point in retrying Not Ready */ return SCSIRET_CONTINUE; #endif if (((sense->error_code & SSD_ERRCODE) == 0x70) && ((sense->ext.extended.flags & SSD_KEY) == 0x04)) /* No point in retrying Hardware Failure */ return SCSIRET_CONTINUE; if (((sense->error_code & SSD_ERRCODE) == 0x70) && ((sense->ext.extended.flags & SSD_KEY) == 0x05)) /* No point in retrying Illegal Requests */ return SCSIRET_CONTINUE; asc = (ext->extra_len >= 5) ? ext->add_sense_code : 0; ascq = (ext->extra_len >= 6) ? ext->add_sense_code_qual : 0; if (asc == 0x11 || asc == 0x30 || asc == 0x31 || asc == 0x53 || asc == 0x5a) { /* Unrecovered errors */ return SCSIRET_CONTINUE; } if (asc == 0x21 && ascq == 0) { /* Logical block address out of range */ return SCSIRET_CONTINUE; } if (asc == 0x27 && ascq == 0) { /* Write protected */ return SCSIRET_CONTINUE; } if (asc == 0x28 && ascq == 0) { /* Not ready to ready transition */ /* (medium may have changed) */ return SCSIRET_CONTINUE; } if (asc == 0x3a && ascq == 0) { /* Medium not present */ return SCSIRET_CONTINUE; } /* Retry all disk errors. */ scsi_sense_print(xs); if (xs->retries) printf(", retries:%d\n", xs->retries); else printf(", FAILURE\n"); return SCSIRET_DO_RETRY; } static od_devsw_installed = 0; static void od_drvinit(void *unused) { if( ! od_devsw_installed ) { bdevsw_add_generic(BDEV_MAJOR, CDEV_MAJOR, &od_bdevsw); od_devsw_installed = 1; } } SYSINIT(oddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,od_drvinit,NULL)