390 lines
9.9 KiB
C
390 lines
9.9 KiB
C
/*
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* Copyright (C) 1992, 1993, 1994, HD Associates, Inc.
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* PO Box 276
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* Pepperell, MA 01463
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* 508 433 5266
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* dufault@hda.com
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*
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* This code is contributed to the University of California at Berkeley:
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its 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 THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*End copyright
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*
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* $Id: scsi_ioctl.c,v 1.24 1997/02/22 09:44:33 peter Exp $
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*
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*
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*/
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#include "opt_bounce.h"
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#include "opt_scsi.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#define b_screq b_driver1 /* a patch in buf.h */
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#define b_sc_link b_driver2 /* a patch in buf.h */
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#include <sys/fcntl.h>
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#include <sys/proc.h>
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#include <vm/vm.h>
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#include "scbus.h"
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#include <scsi/scsi_debug.h>
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#include <sys/scsiio.h>
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static void scsierr(struct buf *, int); /* XXX ??? */
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/*
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* We let the user interpret his own sense in the generic scsi world.
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* This routine is called at interrupt time if the SCSI_USER bit was set
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* in the flags passed to scsi_scsi_cmd(). No other completion processing
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* takes place, even if we are running over another device driver.
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* The lower level routines that call us here, will free the xs and restart
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* the device's queue if such exists.
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*/
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#ifndef min
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#define min(A,B) ((A<B) ? A : B )
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#endif
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void scsi_user_done(xs)
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struct scsi_xfer *xs;
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{
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struct buf *bp;
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scsireq_t *screq;
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bp = xs->bp;
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if(!bp) { /* ALL user requests must have a buf */
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sc_print_addr(xs->sc_link);
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printf("User command with no buf\n");
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return ;
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}
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screq = bp->b_screq;
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if (!screq) { /* Is it one of ours? (the SCSI_USER bit says it is) */
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sc_print_addr(xs->sc_link);
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printf("User command with no request\n");
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return ;
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}
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SC_DEBUG(xs->sc_link,SDEV_DB2,("user-done\n"));
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screq->retsts = 0;
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screq->status = xs->status;
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switch((int)xs->error) {
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case XS_NOERROR:
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SC_DEBUG(xs->sc_link,SDEV_DB3,("no error\n"));
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if (xs->flags & SCSI_RESID_VALID)
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screq->datalen_used = xs->datalen - xs->resid;
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else
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screq->datalen_used = xs->datalen;
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screq->retsts = SCCMD_OK;
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break;
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case XS_SENSE:
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SC_DEBUG(xs->sc_link,SDEV_DB3,("have sense\n"));
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screq->senselen_used = min(sizeof(xs->sense),SENSEBUFLEN);
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bcopy(&xs->sense,screq->sense,screq->senselen);
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screq->retsts = SCCMD_SENSE;
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break;
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case XS_DRIVER_STUFFUP:
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sc_print_addr(xs->sc_link);
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printf("host adapter code inconsistency\n");
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screq->retsts = SCCMD_UNKNOWN;
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break;
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case XS_TIMEOUT:
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SC_DEBUG(xs->sc_link,SDEV_DB3,("timeout\n"));
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screq->retsts = SCCMD_TIMEOUT;
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break;
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case XS_BUSY:
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SC_DEBUG(xs->sc_link,SDEV_DB3,("busy\n"));
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screq->retsts = SCCMD_BUSY;
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break;
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default:
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sc_print_addr(xs->sc_link);
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printf("unknown error category from host adapter code\n");
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screq->retsts = SCCMD_UNKNOWN;
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break;
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}
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biodone(bp); /* we're waiting on it in scsistrategy() */
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return; /* it'll free the xs and restart any queue */
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}
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/* Pseudo strategy function
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* Called by scsi_do_ioctl() via physio/physstrat if there is to
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* be data transfered, and directly if there is no data transfer.
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*
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* Can't be used with block devices or raw_read/raw_write directly
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* from the cdevsw/bdevsw tables because they couldn't have added
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* the screq structure. [JRE]
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*/
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static void
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scsistrategy(struct buf *bp)
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{
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errval err;
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struct scsi_link *sc_link = bp->b_sc_link;
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scsireq_t *screq;
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u_int32_t flags = 0;
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int s;
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if(!sc_link) {
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printf("user_strat: No link pointer\n");
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scsierr(bp,EINVAL);
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return;
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}
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SC_DEBUG(sc_link,SDEV_DB2,("user_strategy\n"));
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screq = bp->b_screq;
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if(!screq) {
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sc_print_addr(sc_link);
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printf("No request block\n");
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scsierr(bp,EINVAL);
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return;
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}
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/* We're in trouble if physio tried to break up the
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* transfer:
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*/
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if (bp->b_bcount != screq->datalen) {
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sc_print_addr(sc_link);
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printf("physio split the request.. cannot proceed\n");
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scsierr(bp, EIO);
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return;
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}
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if (screq->timeout == 0) {
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scsierr(bp, EINVAL);
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return;
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}
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if (screq->cmdlen > sizeof(struct scsi_generic)) {
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sc_print_addr(sc_link);
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printf("cmdlen too big ");
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scsierr(bp, EFAULT);
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return;
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}
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if (screq->flags & SCCMD_READ)
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flags |= SCSI_DATA_IN;
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if (screq->flags & SCCMD_WRITE)
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flags |= SCSI_DATA_OUT;
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if (screq->flags & SCCMD_TARGET)
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flags |= SCSI_TARGET;
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if (screq->flags & SCCMD_ESCAPE)
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flags |= SCSI_ESCAPE;
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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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err = scsi_scsi_cmd(sc_link,
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(struct scsi_generic *)screq->cmd,
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screq->cmdlen,
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(u_char *)bp->b_un.b_addr,
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screq->datalen,
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0, /* user must do the retries *//* ignored */
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screq->timeout,
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bp,
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flags | SCSI_USER);
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/*because there is a bp, scsi_scsi_cmd will return immediatly*/
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if (err)
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{
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scsierr(bp, err);
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return;
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}
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SC_DEBUG(sc_link,SDEV_DB3,("about to sleep\n"));
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s = splbio();
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while(!(bp->b_flags & B_DONE))
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{
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tsleep((caddr_t)bp, PRIBIO, "scsistrat", 0);
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}
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splx(s);
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SC_DEBUG(sc_link,SDEV_DB3,("back from sleep\n"));
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return;
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}
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/*
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* Something (e.g. another driver) has called us
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* with an sc_link for a target/lun/adapter, and a scsi
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* specific ioctl to perform, better try.
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* If user-level type command, we must still be running
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* in the context of the calling process
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*/
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errval scsi_do_ioctl(dev_t dev, int cmd, caddr_t addr, int flags,
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struct proc *p, struct scsi_link *sc_link)
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{
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errval ret = 0;
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/* If we can't write the device we can't permit much:
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*/
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if (cmd != SCIOCIDENTIFY && !(flags & FWRITE))
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return EACCES;
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SC_DEBUG(sc_link,SDEV_DB2,("scsi_do_ioctl(0x%x)\n",cmd));
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switch(cmd)
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{
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case SCIOCCOMMAND:
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{
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/*
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* You won't believe this, but the arg copied in
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* from the user space, is on the kernel stack
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* for this process, so we can't write
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* to it at interrupt time..
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* we need to copy it in and out!
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* Make a static copy using malloc!
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*/
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scsireq_t *screq2 = (scsireq_t *)addr;
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scsireq_t *screq = (scsireq_t *)addr;
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int rwflag = (screq->flags & SCCMD_READ) ? B_READ : B_WRITE;
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struct buf *bp;
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caddr_t d_addr;
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int len;
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#if 0 /* XXX dufault@hda.com: This looks too rev dependent. Do it always? */
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if((unsigned int)screq < (unsigned int)KERNBASE)
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#endif
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{
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screq = malloc(sizeof(scsireq_t),M_TEMP,M_WAITOK);
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bcopy(screq2,screq,sizeof(scsireq_t));
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}
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bp = malloc(sizeof (struct buf),M_TEMP,M_WAITOK);
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bzero(bp,sizeof(struct buf));
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d_addr = screq->databuf;
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bp->b_bcount = len = screq->datalen;
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bp->b_screq = screq;
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bp->b_sc_link = sc_link;
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if (len) {
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struct uio auio;
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struct iovec aiov;
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long cnt;
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aiov.iov_base = d_addr;
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aiov.iov_len = len;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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auio.uio_resid = len;
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if (auio.uio_resid < 0)
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return (EINVAL);
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auio.uio_rw = (rwflag == B_READ) ? UIO_READ : UIO_WRITE;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_procp = curproc;
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cnt = len;
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ret = physio(scsistrategy, bp, dev, rwflag,
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minphys, &auio);
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} else {
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/* if no data, no need to translate it.. */
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bp->b_un.b_addr = 0;
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bp->b_dev = dev;
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bp->b_flags |= B_BUSY;
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scsistrategy(bp);
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ret = bp->b_error;
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}
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free(bp,M_TEMP);
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#if 0 /* XXX dufault@hda.com: This looks too rev dependent. Do it always? */
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if((unsigned int)screq2 < (unsigned int)KERNBASE)
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#endif
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{
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bcopy(screq,screq2,sizeof(scsireq_t));
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free(screq,M_TEMP);
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}
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break;
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}
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case SCIOCDEBUG:
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{
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int level = *((int *)addr);
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SC_DEBUG(sc_link,SDEV_DB3,("debug set to %d\n",level));
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sc_link->flags &= ~SDEV_DBX; /*clear debug bits */
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if(level & 1) sc_link->flags |= SDEV_DB1;
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if(level & 2) sc_link->flags |= SDEV_DB2;
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if(level & 4) sc_link->flags |= SDEV_DB3;
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if(level & 8) sc_link->flags |= SDEV_DB4;
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ret = 0;
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break;
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}
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case SCIOCREPROBE:
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{
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struct scsi_addr *sca = (struct scsi_addr *) addr;
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ret = scsi_probe_busses(sca->scbus,sca->target,sca->lun);
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break;
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}
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case SCIOCRECONFIG:
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case SCIOCDECONFIG:
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ret = EINVAL;
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break;
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case SCIOCIDENTIFY:
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{
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struct scsi_addr *sca = (struct scsi_addr *) addr;
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sca->scbus = sc_link->scsibus;
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sca->target = sc_link->target;
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sca->lun = sc_link->lun;
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break;
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}
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default:
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ret = ENOTTY;
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break;
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}
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return ret;
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}
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void
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scsierr(bp,err)
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struct buf *bp;
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int err;
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{
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bp->b_flags |= B_ERROR;
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bp->b_error = err;
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biodone(bp);
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return;
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}
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