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NetBSD/sys/dev/scsipi/scsipi_ioctl.c

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/* $NetBSD: scsipi_ioctl.c,v 1.66 2008/07/14 12:36:44 drochner Exp $ */
/*-
* Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Contributed by HD Associates (hd@world.std.com).
* Copyright (c) 1992, 1993 HD Associates
*
* Berkeley style copyright.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: scsipi_ioctl.c,v 1.66 2008/07/14 12:36:44 drochner Exp $");
#include "opt_compat_freebsd.h"
#include "opt_compat_netbsd.h"
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/fcntl.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsipiconf.h>
#include <dev/scsipi/scsipi_base.h>
#include <dev/scsipi/scsiconf.h>
#include <sys/scsiio.h>
#include "scsibus.h"
#include "atapibus.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 scsipi_periph *si_periph;
};
static LIST_HEAD(, scsi_ioctl) si_head;
static struct scsi_ioctl *
si_get(void)
{
struct scsi_ioctl *si;
int s;
si = malloc(sizeof(struct scsi_ioctl), M_TEMP, M_WAITOK|M_ZERO);
buf_init(&si->si_bp);
s = splbio();
LIST_INSERT_HEAD(&si_head, si, si_list);
splx(s);
return (si);
}
static void
si_free(struct scsi_ioctl *si)
{
int s;
s = splbio();
LIST_REMOVE(si, si_list);
splx(s);
buf_destroy(&si->si_bp);
free(si, M_TEMP);
}
static struct scsi_ioctl *
si_find(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 XS_CTL_USERCMD bit was set
* in the flags passed to scsi_scsipi_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
scsipi_user_done(struct scsipi_xfer *xs)
{
struct buf *bp;
struct scsi_ioctl *si;
scsireq_t *screq;
struct scsipi_periph *periph = xs->xs_periph;
int s;
bp = xs->bp;
#ifdef DIAGNOSTIC
if (bp == NULL) {
scsipi_printaddr(periph);
printf("user command with no buf\n");
panic("scsipi_user_done");
}
#endif
si = si_find(bp);
#ifdef DIAGNOSTIC
if (si == NULL) {
scsipi_printaddr(periph);
printf("user command with no ioctl\n");
panic("scsipi_user_done");
}
#endif
screq = &si->si_screq;
SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("user-done\n"));
screq->retsts = 0;
screq->status = xs->status;
switch (xs->error) {
case XS_NOERROR:
SC_DEBUG(periph, SCSIPI_DB3, ("no error\n"));
screq->datalen_used =
xs->datalen - xs->resid; /* probably rubbish */
screq->retsts = SCCMD_OK;
break;
case XS_SENSE:
SC_DEBUG(periph, SCSIPI_DB3, ("have sense\n"));
screq->senselen_used = min(sizeof(xs->sense.scsi_sense),
SENSEBUFLEN);
memcpy(screq->sense, &xs->sense.scsi_sense, screq->senselen);
screq->retsts = SCCMD_SENSE;
break;
case XS_SHORTSENSE:
SC_DEBUG(periph, SCSIPI_DB3, ("have short sense\n"));
screq->senselen_used = min(sizeof(xs->sense.atapi_sense),
SENSEBUFLEN);
memcpy(screq->sense, &xs->sense.scsi_sense, screq->senselen);
screq->retsts = SCCMD_UNKNOWN; /* XXX need a shortsense here */
break;
case XS_DRIVER_STUFFUP:
scsipi_printaddr(periph);
printf("passthrough: adapter inconsistency\n");
screq->retsts = SCCMD_UNKNOWN;
break;
case XS_SELTIMEOUT:
SC_DEBUG(periph, SCSIPI_DB3, ("seltimeout\n"));
screq->retsts = SCCMD_TIMEOUT;
break;
case XS_TIMEOUT:
SC_DEBUG(periph, SCSIPI_DB3, ("timeout\n"));
screq->retsts = SCCMD_TIMEOUT;
break;
case XS_BUSY:
SC_DEBUG(periph, SCSIPI_DB3, ("busy\n"));
screq->retsts = SCCMD_BUSY;
break;
default:
scsipi_printaddr(periph);
printf("unknown error category %d from adapter\n",
xs->error);
screq->retsts = SCCMD_UNKNOWN;
break;
}
if (xs->xs_control & XS_CTL_ASYNC) {
s = splbio();
scsipi_put_xs(xs);
splx(s);
}
}
/* Pseudo strategy function
* Called by scsipi_do_ioctl() via physio/physstrat if there is to
* be data transfered, and directly if there is no data transfer.
*
* Should I reorganize this so it returns to physio instead
* of sleeping in scsiio_scsipi_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]
*/
static void
scsistrategy(struct buf *bp)
{
struct scsi_ioctl *si;
scsireq_t *screq;
struct scsipi_periph *periph;
int error;
int flags = 0;
si = si_find(bp);
if (si == NULL) {
printf("scsistrategy: "
"No matching ioctl request found in queue\n");
error = EINVAL;
goto done;
}
screq = &si->si_screq;
periph = si->si_periph;
SC_DEBUG(periph, SCSIPI_DB2, ("user_strategy\n"));
/*
* We're in trouble if physio tried to break up the transfer.
*/
if (bp->b_bcount != screq->datalen) {
scsipi_printaddr(periph);
printf("physio split the request.. cannot proceed\n");
error = EIO;
goto done;
}
if (screq->timeout == 0) {
error = EINVAL;
goto done;
}
if (screq->cmdlen > sizeof(struct scsipi_generic)) {
scsipi_printaddr(periph);
printf("cmdlen too big\n");
error = EFAULT;
goto done;
}
if ((screq->flags & SCCMD_READ) && screq->datalen > 0)
flags |= XS_CTL_DATA_IN;
if ((screq->flags & SCCMD_WRITE) && screq->datalen > 0)
flags |= XS_CTL_DATA_OUT;
if (screq->flags & SCCMD_TARGET)
flags |= XS_CTL_TARGET;
if (screq->flags & SCCMD_ESCAPE)
flags |= XS_CTL_ESCAPE;
error = scsipi_command(periph, (void *)screq->cmd, screq->cmdlen,
(void *)bp->b_data, screq->datalen,
0, /* user must do the retries *//* ignored */
screq->timeout, bp, flags | XS_CTL_USERCMD);
done:
if (error)
bp->b_resid = bp->b_bcount;
bp->b_error = error;
biodone(bp);
return;
}
/*
* Something (e.g. another driver) has called us
* with a periph 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
scsipi_do_ioctl(struct scsipi_periph *periph, dev_t dev, u_long cmd,
void *addr, int flag, struct lwp *l)
{
int error;
SC_DEBUG(periph, SCSIPI_DB2, ("scsipi_do_ioctl(0x%lx)\n", cmd));
if (addr == NULL)
return EINVAL;
/* Check for the safe-ness of this request. */
switch (cmd) {
case OSCIOCIDENTIFY:
case SCIOCIDENTIFY:
break;
case SCIOCCOMMAND:
if ((((scsireq_t *)addr)->flags & SCCMD_READ) == 0 &&
(flag & FWRITE) == 0)
return (EBADF);
break;
default:
if ((flag & FWRITE) == 0)
return (EBADF);
}
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_periph = periph;
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_rw =
(screq->flags & SCCMD_READ) ? UIO_READ : UIO_WRITE;
if ((flag & FKIOCTL) == 0) {
si->si_uio.uio_vmspace = l->l_proc->p_vmspace;
} else {
UIO_SETUP_SYSSPACE(&si->si_uio);
}
error = physio(scsistrategy, &si->si_bp, dev,
(screq->flags & SCCMD_READ) ? B_READ : B_WRITE,
periph->periph_channel->chan_adapter->adapt_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 = l->l_proc;
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(periph, SCSIPI_DB3, ("debug set to %d\n", level));
periph->periph_dbflags = 0;
if (level & 1)
periph->periph_dbflags |= SCSIPI_DB1;
if (level & 2)
periph->periph_dbflags |= SCSIPI_DB2;
if (level & 4)
periph->periph_dbflags |= SCSIPI_DB3;
if (level & 8)
periph->periph_dbflags |= SCSIPI_DB4;
return (0);
}
case SCIOCRECONFIG:
case SCIOCDECONFIG:
return (EINVAL);
case SCIOCIDENTIFY: {
struct scsi_addr *sca = (struct scsi_addr *)addr;
switch (scsipi_periph_bustype(periph)) {
case SCSIPI_BUSTYPE_SCSI:
sca->type = TYPE_SCSI;
sca->addr.scsi.scbus =
device_unit(device_parent(periph->periph_dev));
sca->addr.scsi.target = periph->periph_target;
sca->addr.scsi.lun = periph->periph_lun;
return (0);
case SCSIPI_BUSTYPE_ATAPI:
sca->type = TYPE_ATAPI;
sca->addr.atapi.atbus =
device_unit(device_parent(periph->periph_dev));
sca->addr.atapi.drive = periph->periph_target;
return (0);
}
return (ENXIO);
}
#if defined(COMPAT_12) || defined(COMPAT_FREEBSD)
/* SCIOCIDENTIFY before ATAPI staff merge */
case OSCIOCIDENTIFY: {
struct oscsi_addr *sca = (struct oscsi_addr *)addr;
switch (scsipi_periph_bustype(periph)) {
case SCSIPI_BUSTYPE_SCSI:
sca->scbus =
device_unit(device_parent(periph->periph_dev));
sca->target = periph->periph_target;
sca->lun = periph->periph_lun;
return (0);
}
return (ENODEV);
}
#endif
default:
return (ENOTTY);
}
#ifdef DIAGNOSTIC
panic("scsipi_do_ioctl: impossible");
#endif
}
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