853 lines
22 KiB
C
853 lines
22 KiB
C
/*
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* Copyright (c) 1995 Shunsuke Akiyama. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Shunsuke Akiyama.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Shunsuke Akiyama AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: od.c,v 1.10 1995/12/14 09:54:22 phk Exp $
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*/
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/*
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* TODO:
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* 1. Add optical disk specific ioctl functions, such as eject etc.
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*/
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#include "opt_bounce.h"
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#define SPLOD splbio
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/dkbad.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/errno.h>
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#include <sys/dkstat.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <scsi/scsi_all.h>
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#include <scsi/scsi_disk.h>
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#include <scsi/scsiconf.h>
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#include <vm/vm.h>
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#include <sys/devconf.h>
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#include <sys/dkstat.h>
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#include <machine/md_var.h>
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static u_int32 odstrats, odqueues;
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#define SECSIZE 512
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#define ODOUTSTANDING 4
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#define OD_RETRIES 4
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#define MAXTRANSFER 8 /* 1 page at a time */
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#define PARTITION(dev) dkpart(dev)
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#define ODUNIT(dev) dkunit(dev)
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/* XXX introduce a dkmodunit() macro for this. */
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#define ODSETUNIT(DEV, U) \
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makedev(major(DEV), dkmakeminor((U), dkslice(DEV), dkpart(DEV)))
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struct scsi_data {
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u_int32 flags;
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#define ODINIT 0x04 /* device has been init'd */
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struct disk_parms {
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u_char heads; /* Number of heads */
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u_int16 cyls; /* Number of cylinders */
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u_char sectors; /* dubious *//* Number of sectors/track */
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u_int16 secsiz; /* Number of bytes/sector */
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u_int32 disksize; /* total number sectors */
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} params;
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struct diskslices *dk_slices; /* virtual drives */
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struct buf_queue_head buf_queue;
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int dkunit; /* disk stats unit number */
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#ifdef DEVFS
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void *b_devfs_token; /*eventually move to common disk struct */
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void *c_devfs_token; /*eventually move to common disk struct */
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#endif
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};
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static errval od_get_parms __P((int unit, int flags));
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static errval od_reassign_blocks __P((int unit, int block));
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static u_int32 od_size __P((int unit, int flags));
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static int od_sense_handler __P((struct scsi_xfer *));
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static void odstart __P((u_int32, u_int32));
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static void odstrategy1 __P((struct buf *));
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static dev_t odsetunit(dev_t dev, int unit) { return ODSETUNIT(dev, unit); }
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static int odunit(dev_t dev) { return ODUNIT(dev); }
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static errval od_open __P((dev_t dev, int mode, int fmt, struct proc *p,
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struct scsi_link *sc_link));
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static errval od_ioctl(dev_t dev, int cmd, caddr_t addr, int flag,
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struct proc *p, struct scsi_link *sc_link);
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static errval od_close __P((dev_t dev, int fflag, int fmt, struct proc *p,
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struct scsi_link *sc_link));
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static void od_strategy(struct buf *bp, struct scsi_link *sc_link);
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static d_open_t odopen;
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static d_close_t odclose;
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static d_ioctl_t odioctl;
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static d_strategy_t odstrategy;
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#define CDEV_MAJOR 70
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#define BDEV_MAJOR 20
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extern struct cdevsw od_cdevsw;
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static struct bdevsw od_bdevsw =
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{ odopen, odclose, odstrategy, odioctl, /*20*/
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nodump, nopsize, 0, "od", &od_cdevsw, -1 };
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static struct cdevsw od_cdevsw =
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{ odopen, odclose, rawread, rawwrite, /*70*/
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odioctl, nostop, nullreset, nodevtotty,
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seltrue, nommap, odstrategy, "od",
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&od_bdevsw, -1 };
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/*
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* Actually include the interface routines
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*/
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SCSI_DEVICE_ENTRIES(od)
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static struct scsi_device od_switch =
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{
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od_sense_handler,
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odstart, /* have a queue, served by this */
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NULL, /* have no async handler */
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NULL, /* Use default 'done' routine */
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"od",
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0,
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{0, 0},
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0, /* Link flags */
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odattach,
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"Optical",
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odopen,
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sizeof(struct scsi_data),
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T_OPTICAL,
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odunit,
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odsetunit,
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od_open,
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od_ioctl,
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od_close,
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od_strategy,
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};
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static int
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od_externalize(struct kern_devconf *kdc, struct sysctl_req *req)
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{
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return scsi_externalize(SCSI_LINK(&od_switch, kdc->kdc_unit), req);
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}
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static struct kern_devconf kdc_od_template = {
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0, 0, 0, /* filled in by dev_attach */
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"od", 0, MDDC_SCSI,
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od_externalize, 0, scsi_goaway, SCSI_EXTERNALLEN,
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&kdc_scbus0, /* XXX parent */
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0, /* parentdata */
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DC_UNKNOWN, /* not supported */
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};
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static inline void
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od_registerdev(int unit)
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{
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struct kern_devconf *kdc;
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MALLOC(kdc, struct kern_devconf *, sizeof *kdc, M_TEMP, M_NOWAIT);
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if(!kdc) return;
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*kdc = kdc_od_template;
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kdc->kdc_unit = unit;
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kdc->kdc_description = od_switch.desc;
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dev_attach(kdc);
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if(dk_ndrive < DK_NDRIVE) {
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sprintf(dk_names[dk_ndrive], "od%d", unit);
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dk_wpms[dk_ndrive] = (8*1024*1024/2);
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SCSI_DATA(&od_switch, unit)->dkunit = dk_ndrive++;
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} else {
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SCSI_DATA(&od_switch, unit)->dkunit = -1;
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}
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}
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/*
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* The routine called by the low level scsi routine when it discovers
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* a device suitable for this driver.
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*/
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static errval
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odattach(struct scsi_link *sc_link)
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{
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u_int32 unit;
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struct disk_parms *dp;
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char name[32];
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struct scsi_data *od = sc_link->sd;
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unit = sc_link->dev_unit;
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dp = &(od->params);
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if (sc_link->opennings > ODOUTSTANDING)
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sc_link->opennings = ODOUTSTANDING;
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TAILQ_INIT(&od->buf_queue);
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/*
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* Use the subdriver to request information regarding
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* the drive. We cannot use interrupts yet, so the
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* request must specify this.
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*/
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od_get_parms(unit, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT);
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/*
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* if we don't have actual parameters, assume 512 bytes/sec
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* (could happen on removable media - MOD)
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* -- this avoids the division below from falling over
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*/
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if(dp->secsiz == 0) dp->secsiz = SECSIZE;
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if (dp->disksize != 0) {
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printf("%ldMB (%ld %d byte sectors)",
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dp->disksize / ((1024L * 1024L) / dp->secsiz),
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dp->disksize,
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dp->secsiz);
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} else {
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printf("od not present");
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}
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#ifndef SCSI_REPORT_GEOMETRY
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if ( (sc_link->flags & SDEV_BOOTVERBOSE) )
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#endif
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{
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sc_print_addr(sc_link);
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printf("with %d cyls, %d heads, and an average %d sectors/track",
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dp->cyls, dp->heads, dp->sectors);
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}
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od->flags |= ODINIT;
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od_registerdev(unit);
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#ifdef DEVFS
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/* FIX PROPERLY WHEN DISKSLICE CODE IS UNDERSTOOD */
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sprintf(name, "rod%d", unit);
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od->c_devfs_token = devfs_add_devsw( "/", name, &od_cdevsw, 0,
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DV_CHR, 0, 0, 0600);
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sprintf(name, "od%d", unit);
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od->b_devfs_token = devfs_add_devsw( "/", name, &od_bdevsw, 0,
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DV_BLK, 0, 0, 0600);
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#endif
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return 0;
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}
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/*
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* open the device. Make sure the partition info is a up-to-date as can be.
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*/
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static errval
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od_open(dev, mode, fmt, p, sc_link)
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dev_t dev;
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int mode;
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int fmt;
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struct proc *p;
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struct scsi_link *sc_link;
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{
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errval errcode = 0;
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u_int32 unit;
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struct disklabel label;
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struct scsi_data *od;
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unit = ODUNIT(dev);
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od = sc_link->sd;
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/*
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* Make sure the disk has been initialized
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* At some point in the future, get the scsi driver
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* to look for a new device if we are not initted
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*/
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if ((!od) || (!(od->flags & ODINIT))) {
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return (ENXIO);
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}
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SC_DEBUG(sc_link, SDEV_DB1,
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("od_open: dev=0x%lx (unit %ld, partition %d)\n",
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dev, unit, PARTITION(dev)));
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/*
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* Check that it is still responding and ok. if the media has
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* been changed this will result in a "unit attention" error
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* which the error code will disregard because the SDEV_OPEN
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* or SDEV_MEDIA_LOADED flag is not yet set. Makes sure that
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* we know it if the media has been changed..
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*/
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scsi_test_unit_ready(sc_link, SCSI_SILENT);
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/*
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* If it's been invalidated, then forget the label
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*/
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sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */
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if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
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/*
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* If somebody still has it open, then forbid re-entry.
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*/
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if (dsisopen(od->dk_slices)) {
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errcode = ENXIO;
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goto bad;
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}
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if (od->dk_slices != NULL)
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dsgone(&od->dk_slices);
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}
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/*
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* This time actually take notice of error returns
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*/
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if (scsi_test_unit_ready(sc_link, SCSI_SILENT) != 0) {
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SC_DEBUG(sc_link, SDEV_DB3, ("not ready\n"));
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errcode = ENXIO;
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goto bad;
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}
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SC_DEBUG(sc_link, SDEV_DB3, ("device present\n"));
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/*
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* In case it is a funny one, tell it to start
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* not needed for most hard drives (ignore failure)
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*/
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scsi_start_unit(sc_link, SCSI_ERR_OK | SCSI_SILENT);
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scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT);
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SC_DEBUG(sc_link, SDEV_DB3, ("'start' attempted "));
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/*
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* Load the physical device parameters
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*/
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errcode = od_get_parms(unit, 0); /* sets SDEV_MEDIA_LOADED */
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if (errcode) {
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goto bad;
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}
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if (od->params.secsiz != SECSIZE) { /* XXX One day... */
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printf("od%ld: Can't deal with %d bytes logical blocks\n",
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unit, od->params.secsiz);
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Debugger("od");
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errcode = ENXIO;
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goto bad;
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}
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SC_DEBUG(sc_link, SDEV_DB3, ("params loaded "));
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/* Build label for whole disk. */
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bzero(&label, sizeof label);
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label.d_secsize = od->params.secsiz;
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label.d_nsectors = od->params.sectors;
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label.d_ntracks = od->params.heads;
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label.d_ncylinders = od->params.cyls;
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label.d_secpercyl = od->params.heads * od->params.sectors;
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if (label.d_secpercyl == 0)
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label.d_secpercyl = 100;
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/* XXX as long as it's not 0 - readdisklabel divides by it (?) */
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label.d_secperunit = od->params.disksize;
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/* Initialize slice tables. */
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errcode = dsopen("od", dev, fmt, &od->dk_slices, &label, odstrategy1,
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(ds_setgeom_t *)NULL);
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if (errcode != 0)
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goto bad;
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SC_DEBUG(sc_link, SDEV_DB3, ("Slice tables initialized "));
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SC_DEBUG(sc_link, SDEV_DB3, ("open %ld %ld\n", odstrats, odqueues));
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return 0;
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bad:
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if (!dsisopen(od->dk_slices)) {
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scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT);
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sc_link->flags &= ~SDEV_OPEN;
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}
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return errcode;
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}
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/*
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* close the device.. only called if we are the LAST occurence of an open
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* device. Convenient now but usually a pain.
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*/
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static errval
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od_close(dev, fflag, fmt, p, sc_link)
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dev_t dev;
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int fflag;
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int fmt;
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struct proc *p;
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struct scsi_link *sc_link;
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{
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struct scsi_data *od;
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od = sc_link->sd;
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dsclose(dev, fmt, od->dk_slices);
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if (!dsisopen(od->dk_slices)) {
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scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT | SCSI_ERR_OK);
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sc_link->flags &= ~SDEV_OPEN;
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}
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return (0);
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}
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/*
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* Actually translate the requested transfer into one the physical driver
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* can understand. The transfer is described by a buf and will include
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* only one physical transfer.
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*/
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static void
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od_strategy(struct buf *bp, struct scsi_link *sc_link)
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{
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u_int32 opri;
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struct scsi_data *od;
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u_int32 unit;
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odstrats++;
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unit = ODUNIT((bp->b_dev));
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od = sc_link->sd;
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/*
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* If the device has been made invalid, error out
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*/
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if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
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bp->b_error = EIO;
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goto bad;
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}
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/*
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* Odd number of bytes
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*/
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if (bp->b_bcount % DEV_BSIZE != 0) {
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bp->b_error = EINVAL;
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goto bad;
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}
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/*
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* Do bounds checking, adjust transfer, set b_cylin and b_pbklno.
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*/
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if (dscheck(bp, od->dk_slices) <= 0)
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goto done; /* XXX check b_resid */
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opri = SPLOD();
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/*
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* Use a bounce buffer if necessary
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*/
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#ifdef BOUNCE_BUFFERS
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if (sc_link->flags & SDEV_BOUNCE)
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vm_bounce_alloc(bp);
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#endif
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/*
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* Place it in the queue of disk activities for this disk
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*/
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TAILQ_INSERT_TAIL(&od->buf_queue, bp, b_act);
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/*
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* Tell the device to get going on the transfer if it's
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* not doing anything, otherwise just wait for completion
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*/
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odstart(unit, 0);
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splx(opri);
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return /*0*/;
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bad:
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bp->b_flags |= B_ERROR;
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done:
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/*
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* Correctly set the buf to indicate a completed xfer
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*/
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bp->b_resid = bp->b_bcount;
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biodone(bp);
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return /*0*/;
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}
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static void
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odstrategy1(struct buf *bp)
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{
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/*
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* XXX - do something to make odstrategy() but not this block while
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* we're doing dsinit() and dsioctl().
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*/
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odstrategy(bp);
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}
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/*
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* odstart looks to see if there is a buf waiting for the device
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* and that the device is not already busy. If both are true,
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* It dequeues the buf and creates a scsi command to perform the
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* transfer in the buf. The transfer request will call scsi_done
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* on completion, which will in turn call this routine again
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* so that the next queued transfer is performed.
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* 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 unit, u_int32 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 blkno, nblk;
|
|
|
|
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..
|
|
*/
|
|
blkno = bp->b_pblkno;
|
|
if (bp->b_bcount & (SECSIZE - 1))
|
|
{
|
|
goto bad;
|
|
}
|
|
nblk = bp->b_bcount >> 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,
|
|
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 0
|
|
/* Wait until we have exclusive access to the device. */
|
|
/* XXX this is how wd does it. How did we work without this? */
|
|
wdsleep(du->dk_ctrlr, "wdioct");
|
|
#endif
|
|
|
|
/*
|
|
* If the device is not valid.. abandon ship
|
|
*/
|
|
if (!(sc_link->flags & SDEV_MEDIA_LOADED))
|
|
return (EIO);
|
|
|
|
if (cmd == DIOCSBAD)
|
|
return (EINVAL); /* XXX */
|
|
error = dsioctl("od", dev, cmd, addr, flag, &od->dk_slices,
|
|
odstrategy1, (ds_setgeom_t *)NULL);
|
|
if (error != -1)
|
|
return (error);
|
|
if (PARTITION(dev) != RAW_PART)
|
|
return (ENOTTY);
|
|
return (scsi_do_ioctl(dev, cmd, addr, flag, p, sc_link));
|
|
}
|
|
|
|
/*
|
|
* Find out from the device what it's capacity is
|
|
*/
|
|
static u_int32
|
|
od_size(unit, flags)
|
|
int unit, flags;
|
|
{
|
|
struct scsi_read_cap_data rdcap;
|
|
struct scsi_read_capacity scsi_cmd;
|
|
u_int32 size;
|
|
struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit);
|
|
|
|
/*
|
|
* 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(sc_link,
|
|
(struct scsi_generic *) &scsi_cmd,
|
|
sizeof(scsi_cmd),
|
|
(u_char *) & rdcap,
|
|
sizeof(rdcap),
|
|
OD_RETRIES,
|
|
20000,
|
|
NULL,
|
|
flags | SCSI_DATA_IN) != 0) {
|
|
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);
|
|
}
|
|
|
|
#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]);
|
|
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(sc_link,
|
|
(struct scsi_generic *) &scsi_cmd,
|
|
sizeof(scsi_cmd),
|
|
(u_char *) & rbdata,
|
|
sizeof(rbdata),
|
|
OD_RETRIES,
|
|
20000,
|
|
NULL,
|
|
SCSI_DATA_OUT));
|
|
}
|
|
#endif
|
|
#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.
|
|
*/
|
|
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 sectors;
|
|
errval retval;
|
|
|
|
/*
|
|
* First check if we have it all loaded
|
|
*/
|
|
if (sc_link->flags & SDEV_MEDIA_LOADED)
|
|
return 0;
|
|
|
|
/*
|
|
* use adaptec standard ficticious geometry
|
|
* this depends on which controller (e.g. 1542C is
|
|
* different. but we have to put SOMETHING here..)
|
|
*/
|
|
sectors = od_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;
|
|
|
|
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;
|
|
|
|
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)
|
|
{
|
|
dev_t dev;
|
|
|
|
if( ! od_devsw_installed ) {
|
|
dev = makedev(CDEV_MAJOR, 0);
|
|
cdevsw_add(&dev,&od_cdevsw, NULL);
|
|
dev = makedev(BDEV_MAJOR, 0);
|
|
bdevsw_add(&dev,&od_bdevsw, NULL);
|
|
od_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
SYSINIT(oddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,od_drvinit,NULL)
|
|
|
|
|