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|
/* $OpenBSD: scsi_ioctl.c,v 1.16 2002/06/09 00:03:54 art Exp $ */
/* $NetBSD: scsi_ioctl.c,v 1.23 1996/10/12 23:23:17 christos Exp $ */
/*
* Copyright (c) 1994 Charles Hannum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Contributed by HD Associates (hd@world.std.com).
* Copyright (c) 1992, 1993 HD Associates
*
* Berkeley style copyright.
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/fcntl.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <sys/scsiio.h>
struct scsi_ioctl {
LIST_ENTRY(scsi_ioctl) si_list;
struct buf si_bp;
struct uio si_uio;
struct iovec si_iov;
scsireq_t si_screq;
struct scsi_link *si_sc_link;
};
LIST_HEAD(, scsi_ioctl) si_head;
struct scsi_ioctl *si_get(void);
void si_free(struct scsi_ioctl *);
struct scsi_ioctl *si_find(struct buf *);
void scsistrategy(struct buf *);
struct scsi_ioctl *
si_get()
{
struct scsi_ioctl *si;
int s;
si = malloc(sizeof(struct scsi_ioctl), M_TEMP, M_WAITOK);
bzero(si, sizeof(struct scsi_ioctl));
s = splbio();
LIST_INSERT_HEAD(&si_head, si, si_list);
splx(s);
return (si);
}
void
si_free(si)
struct scsi_ioctl *si;
{
int s;
s = splbio();
LIST_REMOVE(si, si_list);
splx(s);
free(si, M_TEMP);
}
struct scsi_ioctl *
si_find(bp)
struct buf *bp;
{
struct scsi_ioctl *si;
int s;
s = splbio();
for (si = si_head.lh_first; si != 0; si = si->si_list.le_next)
if (bp == &si->si_bp)
break;
splx(s);
return (si);
}
/*
* We let the user interpret his own sense in the generic scsi world.
* This routine is called at interrupt time if the SCSI_USER bit was set
* in the flags passed to scsi_scsi_cmd(). No other completion processing
* takes place, even if we are running over another device driver.
* The lower level routines that call us here, will free the xs and restart
* the device's queue if such exists.
*/
void
scsi_user_done(xs)
struct scsi_xfer *xs;
{
struct buf *bp;
struct scsi_ioctl *si;
scsireq_t *screq;
struct scsi_link *sc_link;
splassert(IPL_BIO);
bp = xs->bp;
if (!bp) { /* ALL user requests must have a buf */
sc_print_addr(xs->sc_link);
printf("User command with no buf\n");
return;
}
si = si_find(bp);
if (!si) {
sc_print_addr(xs->sc_link);
printf("User command with no ioctl\n");
return;
}
screq = &si->si_screq;
sc_link = si->si_sc_link;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("user-done\n"));
screq->retsts = 0;
screq->status = xs->status;
switch (xs->error) {
case XS_NOERROR:
SC_DEBUG(sc_link, SDEV_DB3, ("no error\n"));
screq->datalen_used = xs->datalen - xs->resid; /* probably rubbish */
screq->retsts = SCCMD_OK;
break;
case XS_SENSE:
SC_DEBUG(sc_link, SDEV_DB3, ("have sense\n"));
screq->senselen_used = min(sizeof(xs->sense), SENSEBUFLEN);
bcopy(&xs->sense, screq->sense, screq->senselen);
screq->retsts = SCCMD_SENSE;
break;
case XS_DRIVER_STUFFUP:
sc_print_addr(sc_link);
printf("host adapter code inconsistency\n");
screq->retsts = SCCMD_UNKNOWN;
break;
case XS_TIMEOUT:
SC_DEBUG(sc_link, SDEV_DB3, ("timeout\n"));
screq->retsts = SCCMD_TIMEOUT;
break;
case XS_BUSY:
SC_DEBUG(sc_link, SDEV_DB3, ("busy\n"));
screq->retsts = SCCMD_BUSY;
break;
default:
sc_print_addr(sc_link);
printf("unknown error category from host adapter code\n");
screq->retsts = SCCMD_UNKNOWN;
break;
}
biodone(bp); /* we're waiting on it in scsi_strategy() */
}
/* Pseudo strategy function
* Called by scsi_do_ioctl() via physio/physstrat if there is to
* be data transferred, and directly if there is no data transfer.
*
* Should I reorganize this so it returns to physio instead
* of sleeping in scsiio_scsi_cmd? Is there any advantage, other
* than avoiding the probable duplicate wakeup in iodone? [PD]
*
* No, seems ok to me... [JRE]
* (I don't see any duplicate wakeups)
*
* Can't be used with block devices or raw_read/raw_write directly
* from the cdevsw/bdevsw tables because they couldn't have added
* the screq structure. [JRE]
*/
void
scsistrategy(bp)
struct buf *bp;
{
struct scsi_ioctl *si;
scsireq_t *screq;
struct scsi_link *sc_link;
int error;
int flags = 0;
int s;
si = si_find(bp);
if (!si) {
printf("user_strat: No ioctl\n");
error = EINVAL;
goto bad;
}
screq = &si->si_screq;
sc_link = si->si_sc_link;
SC_DEBUG(sc_link, SDEV_DB2, ("user_strategy\n"));
/*
* We're in trouble if physio tried to break up the transfer.
*/
if (bp->b_bcount != screq->datalen) {
sc_print_addr(sc_link);
printf("physio split the request.. cannot proceed\n");
error = EIO;
goto bad;
}
if (screq->timeout == 0) {
error = EINVAL;
goto bad;
}
if (screq->cmdlen > sizeof(struct scsi_generic)) {
sc_print_addr(sc_link);
printf("cmdlen too big\n");
error = EFAULT;
goto bad;
}
if (screq->flags & SCCMD_READ)
flags |= SCSI_DATA_IN;
if (screq->flags & SCCMD_WRITE)
flags |= SCSI_DATA_OUT;
if (screq->flags & SCCMD_TARGET)
flags |= SCSI_TARGET;
if (screq->flags & SCCMD_ESCAPE)
flags |= SCSI_ESCAPE;
error = scsi_scsi_cmd(sc_link, (struct scsi_generic *)screq->cmd,
screq->cmdlen, (u_char *)bp->b_data, screq->datalen,
0, /* user must do the retries *//* ignored */
screq->timeout, bp, flags | SCSI_USER | SCSI_NOSLEEP);
/* because there is a bp, scsi_scsi_cmd will return immediatly */
if (error)
goto bad;
SC_DEBUG(sc_link, SDEV_DB3, ("about to sleep\n"));
s = splbio();
while ((bp->b_flags & B_DONE) == 0)
tsleep(bp, PRIBIO, "scistr", 0);
splx(s);
SC_DEBUG(sc_link, SDEV_DB3, ("back from sleep\n"));
return;
bad:
bp->b_flags |= B_ERROR;
bp->b_error = error;
s = splbio();
biodone(bp);
splx(s);
}
/*
* Something (e.g. another driver) has called us
* with an sc_link for a target/lun/adapter, and a scsi
* specific ioctl to perform, better try.
* If user-level type command, we must still be running
* in the context of the calling process
*/
int
scsi_do_ioctl(sc_link, dev, cmd, addr, flag, p)
struct scsi_link *sc_link;
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
int error;
SC_DEBUG(sc_link, SDEV_DB2, ("scsi_do_ioctl(0x%lx)\n", cmd));
/* If we don't have write access, just skip to the safe ones. */
if ((flag & FWRITE) == 0)
return scsi_do_safeioctl(sc_link, dev, cmd, addr, flag, p);
switch(cmd) {
case SCIOCCOMMAND: {
scsireq_t *screq = (scsireq_t *)addr;
struct scsi_ioctl *si;
int len;
si = si_get();
si->si_screq = *screq;
si->si_sc_link = sc_link;
len = screq->datalen;
if (len) {
si->si_iov.iov_base = screq->databuf;
si->si_iov.iov_len = len;
si->si_uio.uio_iov = &si->si_iov;
si->si_uio.uio_iovcnt = 1;
si->si_uio.uio_resid = len;
si->si_uio.uio_offset = 0;
si->si_uio.uio_segflg = UIO_USERSPACE;
si->si_uio.uio_rw =
(screq->flags & SCCMD_READ) ? UIO_READ : UIO_WRITE;
si->si_uio.uio_procp = p;
error = physio(scsistrategy, &si->si_bp, dev,
(screq->flags & SCCMD_READ) ? B_READ : B_WRITE,
sc_link->adapter->scsi_minphys, &si->si_uio);
} else {
/* if no data, no need to translate it.. */
si->si_bp.b_flags = 0;
si->si_bp.b_data = 0;
si->si_bp.b_bcount = 0;
si->si_bp.b_dev = dev;
si->si_bp.b_proc = p;
scsistrategy(&si->si_bp);
error = si->si_bp.b_error;
}
*screq = si->si_screq;
si_free(si);
return error;
}
case SCIOCDEBUG: {
int level = *((int *)addr);
SC_DEBUG(sc_link, SDEV_DB3, ("debug set to %d\n", level));
sc_link->flags &= ~SDEV_DBX; /* clear debug bits */
if (level & 1)
sc_link->flags |= SDEV_DB1;
if (level & 2)
sc_link->flags |= SDEV_DB2;
if (level & 4)
sc_link->flags |= SDEV_DB3;
if (level & 8)
sc_link->flags |= SDEV_DB4;
return 0;
}
case OSCIOCREPROBE: {
struct oscsi_addr *sca = (struct oscsi_addr *)addr;
return scsi_probe_busses(sca->scbus, sca->target, sca->lun);
}
case SCIOCREPROBE: {
struct scsi_addr *sca = (struct scsi_addr *)addr;
return scsi_probe_busses(sca->scbus, sca->target, sca->lun);
}
case SCIOCRECONFIG:
case SCIOCDECONFIG:
return EINVAL;
case SCIOCRESET: {
if ((flag & FWRITE) == 0)
return EBADF;
scsi_scsi_cmd(sc_link, 0, 0, 0, 0, GENRETRY, 2000, NULL,
SCSI_RESET);
return 0;
}
default:
return scsi_do_safeioctl(sc_link, dev, cmd, addr, flag, p);
}
#ifdef DIAGNOSTIC
panic("scsi_do_ioctl: impossible");
#endif
}
int
scsi_do_safeioctl(sc_link, dev, cmd, addr, flag, p)
struct scsi_link *sc_link;
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
SC_DEBUG(sc_link, SDEV_DB2, ("scsi_do_safeioctl(0x%lx)\n", cmd));
switch(cmd) {
case OSCIOCIDENTIFY: {
struct oscsi_addr *sca = (struct oscsi_addr *)addr;
sca->scbus = sc_link->scsibus;
sca->target = sc_link->target;
sca->lun = sc_link->lun;
return 0;
}
case SCIOCIDENTIFY: {
struct scsi_addr *sca = (struct scsi_addr *)addr;
sca->type = (sc_link->flags & SDEV_ATAPI)
? TYPE_ATAPI : TYPE_SCSI;
sca->scbus = sc_link->scsibus;
sca->target = sc_link->target;
sca->lun = sc_link->lun;
return 0;
}
case SCIOCCOMMAND:
case SCIOCDEBUG:
case SCIOCREPROBE:
case OSCIOCREPROBE:
case SCIOCRESET:
return EBADF;
case SCIOCRECONFIG:
case SCIOCDECONFIG:
return EINVAL;
default:
if (sc_link->adapter->ioctl)
return (sc_link->adapter->ioctl)(sc_link, cmd, addr,
flag, p);
else
return ENOTTY;
}
}
|