411 lines
10 KiB
C
411 lines
10 KiB
C
/* $NetBSD: scsi_ioctl.c,v 1.8 1994/10/20 20:31:27 mycroft 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/malloc.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <scsi/scsi_all.h>
|
|
#include <scsi/scsiconf.h>
|
|
#include <sys/scsiio.h>
|
|
|
|
void scsierr __P((struct buf *, int));
|
|
|
|
/*
|
|
* We need to maintain an assocation between the buf and the SCSI request
|
|
* structure. We do this with a simple array of scsi_ioctl structures below.
|
|
* XXX The free structures should probably be in a linked list.
|
|
*/
|
|
#define NIOCTL 16
|
|
|
|
struct scsi_ioctl {
|
|
struct buf *si_bp;
|
|
scsireq_t *si_screq;
|
|
struct scsi_link *si_sc_link;
|
|
struct uio si_uio;
|
|
struct iovec si_iov;
|
|
} scsi_ioctl[NIOCTL];
|
|
|
|
struct scsi_ioctl *
|
|
si_get(bp)
|
|
struct buf *bp;
|
|
{
|
|
int s = splbio();
|
|
struct scsi_ioctl *si;
|
|
int error;
|
|
|
|
for (;;) {
|
|
for (si = scsi_ioctl; si < &scsi_ioctl[NIOCTL]; si++)
|
|
if (si->si_bp == 0) {
|
|
si->si_bp = bp;
|
|
splx(s);
|
|
return si;
|
|
}
|
|
error = tsleep(scsi_ioctl, PRIBIO | PCATCH, "siget", 0);
|
|
if (error) {
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
si_free(si)
|
|
struct scsi_ioctl *si;
|
|
{
|
|
int s = splbio();
|
|
|
|
si->si_bp = 0;
|
|
wakeup(scsi_ioctl);
|
|
splx(s);
|
|
}
|
|
|
|
struct scsi_ioctl *
|
|
si_find(bp)
|
|
struct buf *bp;
|
|
{
|
|
int s = splbio();
|
|
struct scsi_ioctl *si;
|
|
|
|
for (si = scsi_ioctl; si < &scsi_ioctl[NIOCTL]; si++)
|
|
if (si->si_bp == bp) {
|
|
splx(s);
|
|
return si;
|
|
}
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
scsireq_t *screq;
|
|
struct scsi_ioctl *si;
|
|
|
|
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;
|
|
si_free(si);
|
|
if (!screq) { /* Is it one of ours? (the SCSI_USER bit says it is) */
|
|
sc_print_addr(xs->sc_link);
|
|
printf("User command with no request\n");
|
|
return;
|
|
}
|
|
|
|
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(xs->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(xs->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(xs->sc_link);
|
|
printf("host adapter code inconsistency\n");
|
|
screq->retsts = SCCMD_UNKNOWN;
|
|
break;
|
|
case XS_TIMEOUT:
|
|
SC_DEBUG(xs->sc_link, SDEV_DB3, ("timeout\n"));
|
|
screq->retsts = SCCMD_TIMEOUT;
|
|
break;
|
|
case XS_BUSY:
|
|
SC_DEBUG(xs->sc_link, SDEV_DB3, ("busy\n"));
|
|
screq->retsts = SCCMD_BUSY;
|
|
break;
|
|
default:
|
|
sc_print_addr(xs->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() */
|
|
return; /* it'll free the xs and restart any queue */
|
|
}
|
|
|
|
|
|
/* Pseudo strategy function
|
|
* Called by scsi_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_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;
|
|
{
|
|
int err;
|
|
struct scsi_ioctl *si;
|
|
scsireq_t *screq;
|
|
struct scsi_link *sc_link;
|
|
int flags = 0;
|
|
int s;
|
|
|
|
si = si_find(bp);
|
|
if (!si) {
|
|
printf("user_strat: No ioctl\n");
|
|
scsierr(bp, EINVAL);
|
|
return;
|
|
}
|
|
screq = si->si_screq;
|
|
sc_link = si->si_sc_link;
|
|
si_free(si);
|
|
if (!sc_link) {
|
|
printf("user_strat: No link pointer\n");
|
|
scsierr(bp, EINVAL);
|
|
return;
|
|
}
|
|
SC_DEBUG(sc_link, SDEV_DB2, ("user_strategy\n"));
|
|
if (!screq) {
|
|
sc_print_addr(sc_link);
|
|
printf("No request block\n");
|
|
scsierr(bp, EINVAL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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");
|
|
scsierr(bp, EIO);
|
|
return;
|
|
}
|
|
|
|
if (screq->timeout == 0) {
|
|
scsierr(bp, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (screq->cmdlen > sizeof(struct scsi_generic)) {
|
|
sc_print_addr(sc_link);
|
|
printf("cmdlen too big\n");
|
|
scsierr(bp, EFAULT);
|
|
return;
|
|
}
|
|
|
|
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;
|
|
|
|
err = 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);
|
|
|
|
/* because there is a bp, scsi_scsi_cmd will return immediatly */
|
|
if (err) {
|
|
scsierr(bp, err);
|
|
return;
|
|
}
|
|
SC_DEBUG(sc_link, SDEV_DB3, ("about to sleep\n"));
|
|
s = splbio();
|
|
while (!(bp->b_flags & B_DONE))
|
|
tsleep(bp, PRIBIO, "scistr", 0);
|
|
splx(s);
|
|
SC_DEBUG(sc_link, SDEV_DB3, ("back from sleep\n"));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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, f)
|
|
struct scsi_link *sc_link;
|
|
dev_t dev;
|
|
int cmd;
|
|
caddr_t addr;
|
|
int f;
|
|
{
|
|
int error;
|
|
|
|
SC_DEBUG(sc_link, SDEV_DB2, ("scsi_do_ioctl(0x%x)\n", cmd));
|
|
switch(cmd) {
|
|
case SCIOCCOMMAND: {
|
|
/*
|
|
* You won't believe this, but the arg copied in
|
|
* from the user space, is on the kernel stack
|
|
* for this process, so we can't write
|
|
* to it at interrupt time..
|
|
* we need to copy it in and out!
|
|
* Make a static copy using malloc!
|
|
*/
|
|
scsireq_t *screq = (scsireq_t *)addr;
|
|
struct buf *bp;
|
|
struct scsi_ioctl *si;
|
|
caddr_t daddr;
|
|
int len;
|
|
|
|
bp = malloc(sizeof(struct buf), M_TEMP, M_WAITOK);
|
|
bzero(bp, sizeof(struct buf));
|
|
daddr = screq->databuf;
|
|
bp->b_bcount = len = screq->datalen;
|
|
si = si_get(bp);
|
|
if (!si) {
|
|
scsierr(bp, EINTR);
|
|
return EINTR;
|
|
}
|
|
si->si_screq = screq;
|
|
si->si_sc_link = sc_link;
|
|
if (len) {
|
|
si->si_iov.iov_base = daddr;
|
|
si->si_iov.iov_len = len;
|
|
si->si_uio.uio_iov = &si->si_iov;
|
|
si->si_uio.uio_iovcnt = 1;
|
|
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 = curproc; /* XXX */
|
|
error = physio(scsistrategy, 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.. */
|
|
bp->b_data = 0;
|
|
bp->b_dev = -1; /* irrelevant info */
|
|
bp->b_flags = 0;
|
|
scsistrategy(bp);
|
|
error = bp->b_error;
|
|
}
|
|
free(bp, M_TEMP);
|
|
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 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 SCIOCIDENTIFY: {
|
|
struct scsi_addr *sca = (struct scsi_addr *)addr;
|
|
|
|
sca->scbus = sc_link->scsibus;
|
|
sca->target = sc_link->target;
|
|
sca->lun = sc_link->lun;
|
|
return 0;
|
|
}
|
|
default:
|
|
return ENOTTY;
|
|
}
|
|
|
|
#ifdef DIAGNOSTIC
|
|
panic("scsi_do_ioctl: impossible");
|
|
#endif
|
|
}
|
|
|
|
void
|
|
scsierr(bp, error)
|
|
struct buf *bp;
|
|
int error;
|
|
{
|
|
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = error;
|
|
biodone(bp);
|
|
return;
|
|
}
|