1373 lines
33 KiB
C
1373 lines
33 KiB
C
/*
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* Written by Julian Elischer (julian@dialix.oz.au)
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* for TRW Financial Systems for use under the MACH(2.5) operating system.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992
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*
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* $Id: sd.c,v 1.131 1998/06/17 14:13:14 bde Exp $
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*/
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#include "opt_bounce.h"
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#include "opt_devfs.h"
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#include "opt_hw_wdog.h"
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#include "opt_scsi.h"
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#define SPLSD splbio
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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/buf.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/dkstat.h>
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#include <sys/conf.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#ifdef SLICE
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#include <sys/device.h>
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#include <sys/fcntl.h>
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#include <dev/slice/slice.h>
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#endif /* SLICE */
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#endif /* DEVFS */
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#include <scsi/scsi_disk.h>
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#include <scsi/scsiconf.h>
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#include <scsi/scsi_debug.h>
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#include <scsi/scsi_driver.h>
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#include <vm/vm.h>
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#include <vm/vm_prot.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#include <i386/i386/cons.h> /* XXX *//* for aborting dump */
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#ifdef PC98
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#include <pc98/pc98/pc98_machdep.h>
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#endif
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#include "ioconf.h"
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static u_int32_t sdstrats, sdqueues;
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#define SECSIZE 512
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#ifdef PC98
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#define SDOUTSTANDING 2
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#else
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#define SDOUTSTANDING 4
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#endif
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#define SD_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 SDUNIT(dev) dkunit(dev)
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/* XXX introduce a dkmodunit() macro for this. */
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#define SDSETUNIT(DEV, U) \
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makedev(major(DEV), dkmakeminor((U), dkslice(DEV), dkpart(DEV)))
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static errval sd_get_parms __P((int unit, int flags));
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#if 0
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static errval sd_reassign_blocks __P((int unit, int block));
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#endif
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static int sd_size(int unit, u_int32_t *sizep, u_int16_t *secsizep, int flags);
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static void sdstrategy1 __P((struct buf *));
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static int sd_sense_handler __P((struct scsi_xfer *));
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static void sdstart __P((u_int32_t, u_int32_t));
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struct scsi_data {
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u_int32_t flags;
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#define SDINIT 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_t cyls; /* Number of cylinders */
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u_char sectors;/*XXX*/ /* Number of sectors/track */
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u_int16_t secsiz; /* Number of bytes/sector */
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u_int32_t 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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#ifdef SLICE
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struct slice *slice;
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int mynor;
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struct slicelimits limit;
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struct scsi_link *sc_link;
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int unit;
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struct intr_config_hook ich;
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#else /* SLICE */
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void *b_devfs_token;
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void *c_devfs_token;
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#endif /* SLICE */
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void *ctl_devfs_token;
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#endif
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};
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#ifndef SLICE
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static int sdunit(dev_t dev) { return SDUNIT(dev); }
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static dev_t sdsetunit(dev_t dev, int unit) { return SDSETUNIT(dev, unit); }
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static errval sd_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 sd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int flag,
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struct proc *p, struct scsi_link *sc_link);
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static errval sd_close __P((dev_t dev, int flag, int fmt, struct proc *p,
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struct scsi_link *sc_link));
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static void sd_strategy(struct buf *bp, struct scsi_link *sc_link);
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static d_open_t sdopen;
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static d_read_t sdread;
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static d_write_t sdwrite;
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static d_close_t sdclose;
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static d_ioctl_t sdioctl;
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static d_dump_t sddump;
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static d_psize_t sdsize;
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static d_strategy_t sdstrategy;
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#define CDEV_MAJOR 13
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#define BDEV_MAJOR 4
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static struct cdevsw sd_cdevsw = {
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sdopen, sdclose, sdread, sdwrite,
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sdioctl, nostop, nullreset, nodevtotty,
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seltrue, nommap, sdstrategy, "sd",
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NULL, -1, sddump, sdsize,
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D_DISK, 0, -1 };
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#else /* ! SLICE */
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static errval sdattach(struct scsi_link *sc_link);
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static sl_h_IO_req_t sdsIOreq; /* IO req downward (to device) */
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static sl_h_ioctl_t sdsioctl; /* ioctl req downward (to device) */
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static sl_h_open_t sdsopen; /* downwards travelling open */
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static sl_h_close_t sdsclose; /* downwards travelling close */
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static void sds_init (void *arg);
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static sl_h_dump_t sdsdump; /* core dump req downward */
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static struct slice_handler slicetype = {
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"scsidisk",
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0,
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NULL,
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0,
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NULL, /* constructor */
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&sdsIOreq,
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&sdsioctl,
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&sdsopen,
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NULL, /* was close, now free */
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NULL, /* revoke */
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NULL, /* claim */
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NULL, /* verify */
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NULL, /* upconfig */
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&sdsdump
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};
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#endif
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#ifndef SLICE
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SCSI_DEVICE_ENTRIES(sd)
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static struct scsi_device sd_switch =
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{
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sd_sense_handler,
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sdstart, /* 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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"sd",
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0,
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{0, 0},
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0, /* Link flags */
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sdattach,
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"Direct-Access",
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sdopen,
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sizeof(struct scsi_data),
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T_DIRECT,
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sdunit,
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sdsetunit,
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sd_open,
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sd_ioctl,
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sd_close,
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sd_strategy,
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};
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#else /* SLICE */
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static struct scsi_device sd_switch =
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{
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sd_sense_handler,
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sdstart, /* 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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"sd",
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0,
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{0, 0},
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0, /* Link flags */
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sdattach,
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"Direct-Access",
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NULL,
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sizeof(struct scsi_data),
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T_DIRECT,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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};
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/* this should be called by the SYSINIT (?!) */
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void
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sdinit(void)
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{
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scsi_device_register(&sd_switch);
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}
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#endif /* SLICE */
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static struct scsi_xfer sx;
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static __inline void
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sd_registerdev(int unit)
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{
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if(dk_ndrive < DK_NDRIVE) {
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sprintf(dk_names[dk_ndrive], "sd%d", unit);
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dk_wpms[dk_ndrive] = (8*1024*1024/2);
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SCSI_DATA(&sd_switch, unit)->dkunit = dk_ndrive++;
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} else {
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SCSI_DATA(&sd_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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sdattach(struct scsi_link *sc_link)
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{
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u_int32_t unit;
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struct disk_parms *dp;
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#ifdef DEVFS
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int mynor;
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#endif
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struct scsi_data *sd = sc_link->sd;
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unit = sc_link->dev_unit;
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dp = &(sd->params);
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if (sc_link->opennings > SDOUTSTANDING)
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sc_link->opennings = SDOUTSTANDING;
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bufq_init(&sd->buf_queue);
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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,
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SCSI_ERR_OK | SCSI_SILENT | SCSI_NOSLEEP | SCSI_NOMASK);
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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. This may fail with removable media.
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*/
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if (sd_get_parms(unit, SCSI_NOSLEEP | SCSI_NOMASK) == 0) {
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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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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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#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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} else {
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printf("Media parameters not available");
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}
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sd->flags |= SDINIT;
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sd_registerdev(unit);
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#ifdef DEVFS
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#ifdef SLICE
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{
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char namebuf[64];
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sd->unit = unit;
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sd->sc_link = sc_link;
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sprintf(namebuf,"sd%d",sd->unit);
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sd->mynor = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
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sd->limit.blksize = sd->params.secsiz;
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/* need to cast to avoid overflow! */
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sd->limit.slicesize =
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(u_int64_t)sd->params.secsiz * sd->params.disksize;
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sl_make_slice(&slicetype,
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sd,
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&sd->limit,
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&sd->slice,
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NULL,
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namebuf);
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/* Allow full probing */
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sd->slice->probeinfo.typespecific = NULL;
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sd->slice->probeinfo.type = NULL;
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}
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sd->ich.ich_func = sds_init;
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sd->ich.ich_arg = sd;
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config_intrhook_establish(&sd->ich);
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#else /* SLICE */
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mynor = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
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sd->b_devfs_token = devfs_add_devswf(&sd_cdevsw, mynor, DV_BLK,
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UID_ROOT, GID_OPERATOR, 0640,
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"sd%d", unit);
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sd->c_devfs_token = devfs_add_devswf(&sd_cdevsw, mynor, DV_CHR,
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UID_ROOT, GID_OPERATOR, 0640,
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"rsd%d", unit);
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mynor = dkmakeminor(unit, 0, 0); /* XXX */
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sd->ctl_devfs_token = devfs_add_devswf(&sd_cdevsw,
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mynor | SCSI_CONTROL_MASK,
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DV_CHR,
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UID_ROOT, GID_WHEEL, 0600,
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"rsd%d.ctl", unit);
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#endif /* SLICE */
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#endif
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return 0;
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}
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#ifdef SLICE
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/* run a LOT later */
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static void
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sds_init(void *arg)
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{
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struct scsi_data *sd = arg;
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sh_p tp;
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if ((tp = slice_probeall(sd->slice)) != NULL) {
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(*tp->constructor)(sd->slice);
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}
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config_intrhook_disestablish(&sd->ich);
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}
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#endif /* SLICE */
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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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#ifdef SLICE
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static int
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sdsopen(void *private, int flags, int mode, struct proc *p)
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#else /* !SLICE */
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static errval
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sd_open(dev_t dev, int mode, int fmt, struct proc *p, struct scsi_link *sc_link)
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#endif
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{
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#ifdef SLICE
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errval errcode = 0;
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struct scsi_data *sd = private;
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struct scsi_link *sc_link = sd->sc_link;
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u_int32_t unit = sd->unit;
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if ((flags & (FREAD|FWRITE)) == 0) {
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/* Mode chenge to mode 0 (closed) */
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errcode = scsi_device_lock(sc_link);
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if (errcode) {
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return errcode; /* how can close fail? */
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}
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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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scsi_device_unlock(sc_link);
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return (0);
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}
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#else /* !SLICE */
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errval errcode = 0;
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u_int32_t unit;
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struct disklabel label;
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struct scsi_data *sd;
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unit = SDUNIT(dev);
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sd = sc_link->sd;
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#endif /* !SLICE */
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/*
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* Make sure the disk has been initialised
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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 ((!sd) || (!(sd->flags & SDINIT))) {
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return (ENXIO);
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}
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#ifdef SLICE
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SC_DEBUG(sc_link, SDEV_DB1, ("sdsopen: (unit %ld)\n", unit));
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#else /* !SLICE */
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SC_DEBUG(sc_link, SDEV_DB1,
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("sd_open: dev=0x%lx (unit %ld, partition %d)\n",
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dev, unit, PARTITION(dev)));
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#endif /* !SLICE */
|
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|
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/*
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* "unit attention" errors should occur here if the
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* drive has been restarted or the pack changed.
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* just ingnore the result, it's a decoy instruction
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* The error handlers will act on the error though
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* and invalidate any media information we had.
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*/
|
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scsi_test_unit_ready(sc_link, 0);
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|
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errcode = scsi_device_lock(sc_link);
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if (errcode)
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return errcode;
|
|
|
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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) && sd->dk_slices != NULL) {
|
|
#ifndef SLICE
|
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/*
|
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* If somebody still has it open, then forbid re-entry.
|
|
*/
|
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if (dsisopen(sd->dk_slices)) {
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errcode = ENXIO;
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goto close;
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}
|
|
|
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dsgone(&sd->dk_slices);
|
|
#endif /* !SLICE */
|
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}
|
|
|
|
/*
|
|
* Check that it is still responding and ok.
|
|
*/
|
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if (scsi_test_unit_ready(sc_link, 0)) {
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SC_DEBUG(sc_link, SDEV_DB3, ("device not reponding\n"));
|
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errcode = ENXIO;
|
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goto close;
|
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}
|
|
SC_DEBUG(sc_link, SDEV_DB3, ("device ok\n"));
|
|
|
|
/*
|
|
* Load the physical device parameters
|
|
*/
|
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if(errcode = sd_get_parms(unit, 0)) /* sets SDEV_MEDIA_LOADED */
|
|
goto close;
|
|
|
|
SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded "));
|
|
|
|
/* Lock the pack in. */
|
|
scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT);
|
|
|
|
#ifndef SLICE
|
|
/* Build label for whole disk. */
|
|
bzero(&label, sizeof label);
|
|
label.d_secsize = sd->params.secsiz;
|
|
label.d_nsectors = sd->params.sectors;
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label.d_ntracks = sd->params.heads;
|
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label.d_ncylinders = sd->params.cyls;
|
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label.d_secpercyl = sd->params.heads * sd->params.sectors;
|
|
if (label.d_secpercyl == 0)
|
|
label.d_secpercyl = 100;
|
|
/* XXX as long as it's not 0 - readdisklabel divides by it (?) */
|
|
label.d_secperunit = sd->params.disksize;
|
|
|
|
/* Initialize slice tables. */
|
|
errcode = dsopen("sd", dev, fmt, &sd->dk_slices, &label, sdstrategy1,
|
|
(ds_setgeom_t *)NULL, &sd_cdevsw, &sd_cdevsw);
|
|
if (errcode != 0)
|
|
goto close;
|
|
#endif /* !SLICE */
|
|
SC_DEBUG(sc_link, SDEV_DB3, ("Slice tables initialized "));
|
|
|
|
SC_DEBUG(sc_link, SDEV_DB3, ("open %ld %ld\n", sdstrats, sdqueues));
|
|
|
|
scsi_device_unlock(sc_link);
|
|
return 0;
|
|
|
|
close:
|
|
#ifndef SLICE
|
|
if (!dsisopen(sd->dk_slices))
|
|
#else
|
|
if((sd->slice->flags & SLF_OPEN_STATE) == SLF_CLOSED)
|
|
#endif
|
|
{
|
|
scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT);
|
|
sc_link->flags &= ~SDEV_OPEN;
|
|
}
|
|
scsi_device_unlock(sc_link);
|
|
return errcode;
|
|
}
|
|
|
|
#ifndef SLICE
|
|
/*
|
|
* close the device.. only called if we are the LAST occurence of an open
|
|
* device. Convenient now but usually a pain.
|
|
*/
|
|
static errval
|
|
sd_close(dev_t dev,int mode, int fmt, struct proc *p, struct scsi_link *sc_link)
|
|
{
|
|
struct scsi_data *sd;
|
|
errval errcode;
|
|
|
|
sd = sc_link->sd;
|
|
errcode = scsi_device_lock(sc_link);
|
|
if (errcode)
|
|
return errcode;
|
|
dsclose(dev, fmt, sd->dk_slices);
|
|
if (!dsisopen(sd->dk_slices)) {
|
|
scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT | SCSI_ERR_OK);
|
|
sc_link->flags &= ~SDEV_OPEN;
|
|
}
|
|
scsi_device_unlock(sc_link);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sdread(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
return (physio(sdstrategy, NULL, dev, 1, minphys, uio));
|
|
}
|
|
|
|
static int
|
|
sdwrite(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
return (physio(sdstrategy, NULL, dev, 0, minphys, uio));
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
sd_strategy(struct buf *bp, struct scsi_link *sc_link)
|
|
{
|
|
u_int32_t opri;
|
|
struct scsi_data *sd;
|
|
u_int32_t unit, secsize;
|
|
|
|
sdstrats++;
|
|
unit = SDUNIT((bp->b_dev));
|
|
sd = 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;
|
|
}
|
|
|
|
/*
|
|
* check it's not too big a transfer for our adapter
|
|
*/
|
|
scsi_minphys(bp,&sd_switch);
|
|
|
|
/*
|
|
* Odd number of bytes or negative offset
|
|
*/
|
|
if (bp->b_blkno < 0 ) {
|
|
bp->b_error = EINVAL;
|
|
printf("sd_strategy: Negative block number: 0x%x\n",
|
|
bp->b_blkno);
|
|
goto bad;
|
|
}
|
|
|
|
secsize = sd->params.secsiz;
|
|
|
|
/* make sure the blkno is scalable */
|
|
if( (bp->b_blkno % (secsize/DEV_BSIZE)) != 0 ) {
|
|
bp->b_error = EINVAL;
|
|
printf("sd_strategy: Block number is not multiple of sector size (2): 0x%x\n", bp->b_blkno);
|
|
goto bad;
|
|
}
|
|
|
|
/* make sure that the transfer size is a multiple of the sector size */
|
|
if( (bp->b_bcount % secsize) != 0 ) {
|
|
bp->b_error = EINVAL;
|
|
printf("sd_strategy: Invalid b_bcount %d at block number: 0x%x\n", bp->b_bcount, bp->b_blkno);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Do bounds checking, adjust transfer, set b_cylin and b_pbklno.
|
|
*/
|
|
{
|
|
int status;
|
|
int sec_blk_ratio = secsize/DEV_BSIZE;
|
|
int b_blkno = bp->b_blkno;
|
|
|
|
/* Replace blkno and count with scaled values. */
|
|
bp->b_blkno /= sec_blk_ratio;
|
|
bp->b_bcount /= sec_blk_ratio;
|
|
|
|
/* enforce limits and map to physical block number */
|
|
status = dscheck(bp, sd->dk_slices);
|
|
|
|
/*
|
|
* Restore blkno and unscale the values set by dscheck(),
|
|
* except for b_pblkno.
|
|
*/
|
|
bp->b_blkno = b_blkno;
|
|
bp->b_bcount *= sec_blk_ratio;
|
|
bp->b_resid *= sec_blk_ratio;
|
|
|
|
/* see if the mapping failed */
|
|
if (status <= 0)
|
|
goto done; /* XXX check b_resid */
|
|
}
|
|
|
|
opri = SPLSD();
|
|
/*
|
|
* 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
|
|
*/
|
|
#ifdef SDDISKSORT
|
|
bufq_disksort(&sd->buf_queue, bp);
|
|
#else
|
|
bufq_insert_tail(&sd->buf_queue, bp);
|
|
#endif
|
|
|
|
/*
|
|
* Tell the device to get going on the transfer if it's
|
|
* not doing anything, otherwise just wait for completion
|
|
*/
|
|
sdstart(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
|
|
sdstrategy1(struct buf *bp)
|
|
{
|
|
/*
|
|
* XXX - do something to make sdstrategy() but not this block while
|
|
* we're doing dsinit() and dsioctl().
|
|
*/
|
|
sdstrategy(bp);
|
|
}
|
|
|
|
#endif /* ! SLICE */
|
|
/*
|
|
* sdstart looks to see if there is a buf waiting for the device
|
|
* and that the device is not already busy. If both are true,
|
|
* It dequeues the buf and creates a scsi command to perform the
|
|
* transfer in the buf. The transfer request will call scsi_done
|
|
* on completion, which will in turn call this routine again
|
|
* so that the next queued transfer is performed.
|
|
* The bufs are queued by the strategy routine (sdstrategy)
|
|
*
|
|
* This routine is also called after other non-queued requests
|
|
* have been made of the scsi driver, to ensure that the queue
|
|
* continues to be drained.
|
|
*
|
|
* must be called at the correct (highish) spl level
|
|
* sdstart() is called at SPLSD from sdstrategy and scsi_done
|
|
*/
|
|
static void
|
|
sdstart(u_int32_t unit, u_int32_t flags)
|
|
{
|
|
register struct scsi_link *sc_link = SCSI_LINK(&sd_switch, unit);
|
|
register struct scsi_data *sd = sc_link->sd;
|
|
struct buf *bp = NULL;
|
|
struct scsi_rw_big cmd;
|
|
u_int32_t blkno, nblk, secsize;
|
|
|
|
SC_DEBUG(sc_link, SDEV_DB2, ("sdstart "));
|
|
/*
|
|
* Check if the device has room for another command
|
|
*/
|
|
while (sc_link->opennings) {
|
|
|
|
/*
|
|
* there is excess capacity, but a special waits
|
|
* It'll need the adapter as soon as we clear out of the
|
|
* way and let it run (user level wait).
|
|
*/
|
|
if (sc_link->flags & SDEV_WAITING) {
|
|
return;
|
|
}
|
|
/*
|
|
* See if there is a buf with work for us to do..
|
|
*/
|
|
bp = bufq_first(&sd->buf_queue);
|
|
if (bp == NULL) { /* yes, an assign */
|
|
return;
|
|
}
|
|
bufq_remove(&sd->buf_queue, bp);
|
|
|
|
/*
|
|
* 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 = sd->params.secsiz;
|
|
blkno = bp->b_pblkno;
|
|
if (bp->b_bcount & (secsize - 1))
|
|
{
|
|
goto bad;
|
|
}
|
|
nblk = bp->b_bcount / secsize;
|
|
|
|
/*
|
|
* Fill out the scsi command
|
|
*/
|
|
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);
|
|
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_data,
|
|
bp->b_bcount,
|
|
SD_RETRIES,
|
|
10000,
|
|
bp,
|
|
flags | ((bp->b_flags & B_READ) ?
|
|
SCSI_DATA_IN : SCSI_DATA_OUT))
|
|
== SUCCESSFULLY_QUEUED) {
|
|
sdqueues++;
|
|
if(sd->dkunit >= 0) {
|
|
dk_xfer[sd->dkunit]++;
|
|
dk_seek[sd->dkunit]++; /* don't know */
|
|
dk_wds[sd->dkunit] += bp->b_bcount >> 6;
|
|
}
|
|
} else {
|
|
bad:
|
|
printf("sd%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
|
|
*/
|
|
#ifdef SLICE
|
|
static int
|
|
sdsioctl( void *private, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
|
#else /* SLICE */
|
|
static errval
|
|
sd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p,
|
|
struct scsi_link *sc_link)
|
|
#endif /* !SLICE */
|
|
{
|
|
#ifdef SLICE
|
|
struct scsi_data *sd = private;
|
|
struct scsi_link *sc_link = sd->sc_link;
|
|
dev_t dev = makedev(0,sd->mynor);
|
|
|
|
#else /* SLICE */
|
|
errval error;
|
|
struct scsi_data *sd = sc_link->sd;
|
|
#endif /* !SLICE */
|
|
SC_DEBUG(sc_link, SDEV_DB1, ("sdioctl (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? */
|
|
sdsleep(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 */
|
|
|
|
#ifndef SLICE
|
|
error = scsi_device_lock(sc_link);
|
|
if (error)
|
|
return error;
|
|
error = dsioctl("sd", dev, cmd, addr, flag, &sd->dk_slices,
|
|
sdstrategy1, (ds_setgeom_t *)NULL);
|
|
scsi_device_unlock(sc_link);
|
|
if (error != ENOIOCTL)
|
|
return (error);
|
|
if (PARTITION(dev) != RAW_PART)
|
|
return (ENOTTY);
|
|
#endif /* ! SLICE */ /* really only take this from the ctl device XXX */
|
|
return (scsi_do_ioctl(dev, cmd, addr, flag, p, sc_link));
|
|
}
|
|
|
|
/*
|
|
* Find out from the device what its capacity is. It turns
|
|
* out this is also the best way to find out the sector size.
|
|
*/
|
|
static int
|
|
sd_size(int unit, u_int32_t *sizep, u_int16_t *secsizep, int flags)
|
|
{
|
|
struct scsi_read_cap_data rdcap;
|
|
struct scsi_read_capacity scsi_cmd;
|
|
u_int32_t size;
|
|
u_int32_t secsize;
|
|
struct scsi_link *sc_link = SCSI_LINK(&sd_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),
|
|
SD_RETRIES,
|
|
2000,
|
|
NULL,
|
|
flags | SCSI_DATA_IN) != 0) {
|
|
printf("sd%d: could not get size\n", unit);
|
|
return (ENXIO);
|
|
}
|
|
size = rdcap.addr_0 + 1;
|
|
size += rdcap.addr_1 << 8;
|
|
size += rdcap.addr_2 << 16;
|
|
size += rdcap.addr_3 << 24;
|
|
secsize = rdcap.length_0;
|
|
secsize += rdcap.length_1 << 8;
|
|
secsize += rdcap.length_2 << 16;
|
|
secsize += rdcap.length_3 << 24;
|
|
*secsizep = secsize;
|
|
*sizep = size;
|
|
return (0);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Tell the device to map out a defective block
|
|
*/
|
|
static errval
|
|
sd_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(&sd_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),
|
|
SD_RETRIES,
|
|
5000,
|
|
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.
|
|
* Even if we get an error, complete with some dummy information.
|
|
* XXX this is backwards. The read_cap (sd_size()) should be done first.
|
|
*/
|
|
static errval
|
|
sd_get_parms(int unit, int flags)
|
|
{
|
|
struct scsi_link *sc_link = SCSI_LINK(&sd_switch, unit);
|
|
struct scsi_data *sd = sc_link->sd;
|
|
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_t sectors;
|
|
int error = 0;
|
|
|
|
/*
|
|
* First check if we have it all loaded
|
|
*/
|
|
if (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;
|
|
#ifdef PC98
|
|
if (sd_bios_parms(disk_parms, sc_link)) {
|
|
} else
|
|
#endif
|
|
/*
|
|
* If the command worked, use the results to fill out
|
|
* the parameter structure
|
|
*/
|
|
if (scsi_scsi_cmd(sc_link,
|
|
(struct scsi_generic *) &scsi_cmd,
|
|
sizeof(scsi_cmd),
|
|
(u_char *) & scsi_sense,
|
|
sizeof(scsi_sense),
|
|
SD_RETRIES,
|
|
4000,
|
|
NULL,
|
|
flags | SCSI_DATA_IN) != 0) {
|
|
|
|
printf("sd%d could not mode sense (4).", unit);
|
|
printf(" Using fictitious geometry\n");
|
|
/*
|
|
* use adaptec standard fictitious geometry
|
|
* this depends on which controller (e.g. 1542C is
|
|
* different. but we have to put SOMETHING here..)
|
|
*/
|
|
if (error = sd_size(unit, §ors, &disk_parms->secsiz, flags)) {
|
|
/* we couldn't get anyhthing. removable? */
|
|
sectors = 32 * 64;
|
|
disk_parms->secsiz= DEV_BSIZE;;
|
|
}
|
|
disk_parms->heads = 64;
|
|
disk_parms->sectors = 32;
|
|
disk_parms->cyls = sectors / (64 * 32);
|
|
disk_parms->disksize = sectors;
|
|
} else {
|
|
|
|
SC_DEBUG(sc_link, SDEV_DB3,
|
|
("%ld cyls, %d heads, %d precomp, %d red_write, %d land_zone\n",
|
|
scsi_3btou(&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 = scsi_3btou(
|
|
&scsi_sense.pages.rigid_geometry.ncyl_2);
|
|
/* set in a default value */
|
|
disk_parms->secsiz = scsi_3btou(scsi_sense.blk_desc.blklen);
|
|
|
|
if (error = sd_size(unit, §ors,
|
|
&disk_parms->secsiz, flags)) {
|
|
/* we couldn't get anyhthing. removable? */
|
|
sectors = 64 * 32; /* just so non 0 */
|
|
}
|
|
disk_parms->disksize = sectors;
|
|
/* Check if none of these values are zero */
|
|
if(disk_parms->heads && disk_parms->cyls) {
|
|
sectors /= (disk_parms->heads * disk_parms->cyls);
|
|
} else {
|
|
/* set it to something reasonable */
|
|
disk_parms->heads = 64;
|
|
disk_parms->cyls = sectors / (64 * 32);
|
|
sectors = 32;
|
|
}
|
|
/* keep secsiz sane too - we may divide by it later */
|
|
if(disk_parms->secsiz == 0)
|
|
disk_parms->secsiz = SECSIZE;
|
|
disk_parms->sectors = sectors; /* dubious on SCSI *//*XXX */
|
|
}
|
|
switch (sd->params.secsiz) {
|
|
case 512:
|
|
case 1024:
|
|
case 2048:
|
|
break;
|
|
default:
|
|
printf("sd%ld: Can't deal with %d bytes logical blocks\n",
|
|
unit, sd->params.secsiz);
|
|
error = ENXIO;
|
|
}
|
|
if (error == 0)
|
|
sc_link->flags |= SDEV_MEDIA_LOADED;
|
|
return (error);
|
|
}
|
|
|
|
#ifndef SLICE
|
|
static int
|
|
sdsize(dev_t dev)
|
|
{
|
|
struct scsi_data *sd;
|
|
|
|
sd = SCSI_DATA(&sd_switch, (u_int32_t) SDUNIT(dev));
|
|
if (sd == NULL)
|
|
return (-1);
|
|
return (dssize(dev, &sd->dk_slices, sdopen, sdclose));
|
|
}
|
|
|
|
#endif /* ! SLICE */
|
|
/*
|
|
* sense handler: Called to determine what to do when the
|
|
* device returns a CHECK CONDITION.
|
|
*
|
|
* This will issue a retry when the device returns a
|
|
* non-media hardware failure. The CDC-WREN IV does this
|
|
* when you access it during thermal calibrarion, so the drive
|
|
* is pretty useless without this.
|
|
*
|
|
* In general, you probably almost always would like to issue a retry
|
|
* for your disk I/O. It can't hurt too much (the caller only retries
|
|
* so many times) and it may save your butt.
|
|
*/
|
|
|
|
static int
|
|
sd_sense_handler(struct scsi_xfer *xs)
|
|
{
|
|
struct scsi_sense_data *sense;
|
|
struct scsi_inquiry_data *inqbuf;
|
|
|
|
sense = &(xs->sense);
|
|
|
|
/* 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) == 0x05))
|
|
/* No point in retrying Illegal Requests */
|
|
return SCSIRET_CONTINUE;
|
|
|
|
inqbuf = &(xs->sc_link->inqbuf);
|
|
|
|
/* It is dangerous to retry on removable drives without
|
|
* looking carefully at the additional sense code
|
|
* and sense code qualifier and ensuring the disk hasn't changed:
|
|
*/
|
|
if (inqbuf->dev_qual2 & SID_REMOVABLE)
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* dump all of physical memory into the partition specified, starting
|
|
* at offset 'dumplo' into the partition.
|
|
* XXX for SLICE starts at argument 'start'.
|
|
*/
|
|
#ifndef SLICE
|
|
static errval
|
|
sddump(dev_t dev)
|
|
#else
|
|
static int
|
|
sdsdump(void *private, int32_t start, int32_t num)
|
|
#endif /* SLICE */
|
|
{ /* dump core after a system crash */
|
|
#ifndef SLICE
|
|
struct disklabel *lp;
|
|
int32_t num; /* number of sectors to write */
|
|
u_int32_t unit, part;
|
|
int32_t nblocks;
|
|
int32_t blkoff;
|
|
static int sddoingadump = 0;
|
|
#endif /* SLICE */
|
|
register struct scsi_data *sd; /* disk unit to do the IO */
|
|
struct scsi_link *sc_link;
|
|
int32_t blknum, blkcnt = MAXTRANSFER;
|
|
char *addr;
|
|
struct scsi_rw_big cmd;
|
|
struct scsi_xfer *xs = &sx;
|
|
errval retval;
|
|
|
|
addr = (char *) 0; /* starting address */
|
|
|
|
#ifndef SLICE
|
|
/* toss any characters present prior to dump */
|
|
while (cncheckc() != -1) ;
|
|
|
|
/* size of memory to dump */
|
|
num = Maxmem;
|
|
unit = SDUNIT(dev); /* eventually support floppies? */
|
|
part = PARTITION(dev); /* file system */
|
|
|
|
sc_link = SCSI_LINK(&sd_switch, unit);
|
|
|
|
if (!sc_link)
|
|
return ENXIO;
|
|
|
|
sd = sc_link->sd;
|
|
#else
|
|
sd = private;
|
|
sc_link = sd->sc_link;
|
|
#endif /* SLICE */
|
|
|
|
/* was it ever initialized etc. ? */
|
|
if (!(sd->flags & SDINIT))
|
|
return (ENXIO);
|
|
if ((sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED)
|
|
return (ENXIO);
|
|
#ifndef SLICE
|
|
if (sd->dk_slices == NULL)
|
|
Debugger("sddump: no slices");
|
|
if ((lp = dsgetlabel(dev, sd->dk_slices)) == NULL)
|
|
return (ENXIO);
|
|
|
|
/* Convert to disk sectors */
|
|
/* XXX it must be 512 */
|
|
num = (u_int32_t) num * PAGE_SIZE / sd->params.secsiz;
|
|
|
|
/* check if controller active */
|
|
if (sddoingadump)
|
|
return (EFAULT);
|
|
|
|
nblocks = lp->d_partitions[part].p_size;
|
|
blkoff = lp->d_partitions[part].p_offset;
|
|
/* XXX */
|
|
blkoff += sd->dk_slices->dss_slices[dkslice(dev)].ds_offset;
|
|
|
|
/* check transfer bounds against partition size */
|
|
if ((dumplo < 0) || ((dumplo + num) > nblocks))
|
|
return (EINVAL);
|
|
|
|
sddoingadump = 1;
|
|
|
|
blknum = dumplo + blkoff;
|
|
#else
|
|
blknum = start;
|
|
#endif /* SLICE */
|
|
while (num > 0) {
|
|
if (is_physical_memory((vm_offset_t)addr))
|
|
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
|
|
trunc_page(addr), VM_PROT_READ, TRUE);
|
|
else
|
|
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
|
|
trunc_page(0), VM_PROT_READ, TRUE);
|
|
/*
|
|
* 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 | SCSI_DATA_OUT;
|
|
xs->sc_link = sc_link;
|
|
xs->retries = SD_RETRIES;
|
|
xs->timeout = 10000; /* 10000 millisecs for a disk ! */
|
|
xs->cmd = (struct scsi_generic *) &cmd;
|
|
xs->cmdlen = sizeof(cmd);
|
|
xs->resid = 0;
|
|
xs->error = XS_NOERROR;
|
|
xs->bp = 0;
|
|
xs->data = (u_char *) CADDR1; /* XXX use pmap_enter() */
|
|
xs->datalen = blkcnt * sd->params.secsiz;
|
|
|
|
/*
|
|
* Pass all this info to the scsi driver.
|
|
*/
|
|
retval = (*(sc_link->adapter->scsi_cmd)) (xs);
|
|
switch (retval) {
|
|
case SUCCESSFULLY_QUEUED:
|
|
case HAD_ERROR:
|
|
return (ENXIO); /* we said not to sleep! */
|
|
case COMPLETE:
|
|
break;
|
|
default:
|
|
return (ENXIO); /* we said not to sleep! */
|
|
}
|
|
|
|
/*
|
|
* If we are dumping core, it may take a while.
|
|
* So reassure the user and hold off any watchdogs.
|
|
*/
|
|
if ((u_long)addr % (1024 * 1024) == 0) {
|
|
#ifdef HW_WDOG
|
|
if (wdog_tickler)
|
|
(*wdog_tickler)();
|
|
#endif /* HW_WDOG */
|
|
printf("%ld ", num / 2048);
|
|
}
|
|
/* update block count */
|
|
num -= blkcnt;
|
|
blknum += blkcnt;
|
|
(long) addr += blkcnt * sd->params.secsiz;
|
|
|
|
/* operator aborting dump? */
|
|
if (cncheckc() != -1)
|
|
return (EINTR);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
#ifndef SLICE
|
|
static sd_devsw_installed = 0;
|
|
|
|
static void sd_drvinit(void *unused)
|
|
{
|
|
|
|
if( ! sd_devsw_installed ) {
|
|
cdevsw_add_generic(BDEV_MAJOR, CDEV_MAJOR, &sd_cdevsw);
|
|
sd_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
SYSINIT(sddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,sd_drvinit,NULL)
|
|
|
|
#endif /* !SLICE */
|
|
#ifdef SLICE
|
|
|
|
/*
|
|
* arguments, and schedules the transfer. Does not wait for the transfer
|
|
* to complete. Multi-page transfers are supported. All I/O requests must
|
|
* be a multiple of a sector in length.
|
|
scsi_strategy(bp, &sd_switch);
|
|
*/
|
|
static void
|
|
sdsIOreq(void *private ,struct buf *bp)
|
|
{
|
|
struct scsi_data *sd = private;
|
|
u_int32_t opri;
|
|
u_int32_t unit = sd->unit;
|
|
struct scsi_link *sc_link = sd->sc_link;
|
|
|
|
SC_DEBUG(sc_link, SDEV_DB2, ("sdIOreq\n"));
|
|
SC_DEBUG(sc_link, SDEV_DB1, ("%ld bytes @ blk%ld\n",
|
|
bp->b_bcount, bp->b_pblkno));
|
|
|
|
bp->b_resid = 0;
|
|
bp->b_error = 0;
|
|
|
|
(*sc_link->adapter->scsi_minphys)(bp);
|
|
|
|
sdstrats++;
|
|
/*
|
|
* If the device has been made invalid, error out
|
|
*/
|
|
if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
|
|
bp->b_error = EIO;
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* check it's not too big a transfer for our adapter
|
|
*/
|
|
/*scsi_minphys(bp,&sd_switch);*/
|
|
|
|
opri = SPLSD();
|
|
/*
|
|
* 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
|
|
*/
|
|
#ifdef SDDISKSORT
|
|
bufq_disksort(&sd->buf_queue, bp);
|
|
#else
|
|
bufq_insert_tail(&sd->buf_queue, bp);
|
|
#endif
|
|
|
|
/*
|
|
* Tell the device to get going on the transfer if it's
|
|
* not doing anything, otherwise just wait for completion
|
|
*/
|
|
sdstart(unit, 0);
|
|
|
|
splx(opri);
|
|
return;
|
|
bad:
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_resid = bp->b_bcount;
|
|
biodone(bp);
|
|
return;
|
|
}
|
|
#endif
|