7562b0d606
Reenabled "SCIOCOMAND" ioctl. Restructured so low level drivers can easily request retries. Added preliminary fixed SCSI devices (should be revisited before 2.1) Added "ssc" device that can have its' (HBA, ID, LUN) set via ioctl.
377 lines
9.7 KiB
C
377 lines
9.7 KiB
C
/*
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*Begin copyright
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*
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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 1.8 1994/10/08 22:26:37 phk Exp $
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*
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*
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* Note: The SCSIUSER option is required to support the user defined
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* ioctl calls.
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*/
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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/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 <sys/scsiio.h>
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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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screq->datalen_used = xs->datalen - xs->resid; /* probably rubbish */
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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 scsi_strategy() */
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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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void 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 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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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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void scsiminphys(struct buf *bp)
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{
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/*XXX*//* call the adapter's minphys */
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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,
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struct scsi_link *sc_link, int cmd, caddr_t addr, int f)
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{
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errval ret = 0;
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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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#ifdef SCSIUSER
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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, error = 0;
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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 = 0;
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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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#endif /* SCSIUSER */
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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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