1584 lines
38 KiB
C
1584 lines
38 KiB
C
/* $NetBSD: scsi.c,v 1.24 1998/01/12 18:31:08 thorpej Exp $ */
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/*-
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* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Van Jacobson of Lawrence Berkeley Laboratory.
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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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*
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* @(#)scsi.c 8.2 (Berkeley) 1/12/94
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*/
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#ifndef DEBUG
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#define DEBUG
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#endif
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/*
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* HP9000/3xx 98658 SCSI host adaptor driver.
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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/buf.h>
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#include <sys/device.h>
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#include <machine/autoconf.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <machine/hp300spu.h>
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#include <hp300/dev/dioreg.h>
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#include <hp300/dev/diovar.h>
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#include <hp300/dev/diodevs.h>
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#include <hp300/dev/dmavar.h>
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#include <hp300/dev/scsireg.h>
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#include <hp300/dev/scsivar.h>
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#include "locators.h"
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struct scsi_softc {
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struct device sc_dev; /* generic device glue */
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volatile struct scsidevice *sc_regs; /* card registers */
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struct dmaqueue sc_dq; /* our entry in DMA job queue */
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TAILQ_HEAD(, scsiqueue) sc_queue; /* job queue */
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u_char sc_flags;
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u_char sc_sync;
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u_char sc_scsi_addr;
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u_char sc_scsiid; /* XXX unencoded copy of sc_scsi_addr */
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u_char sc_stat[2];
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u_char sc_msg[7];
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};
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/* sc_flags */
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#define SCSI_IO 0x80 /* DMA I/O in progress */
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#define SCSI_DMA32 0x40 /* 32-bit DMA should be used */
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#define SCSI_HAVEDMA 0x04 /* controller has DMA channel */
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#ifdef DEBUG
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#define SCSI_PAD 0x02 /* 'padded' transfer in progress */
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#endif
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#define SCSI_ALIVE 0x01 /* controller initialized */
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/*
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* SCSI delays
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* In u-seconds, primarily for state changes on the SPC.
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*/
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#define SCSI_CMD_WAIT 10000 /* wait per step of 'immediate' cmds */
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#define SCSI_DATA_WAIT 10000 /* wait per data in/out step */
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#define SCSI_INIT_WAIT 50000 /* wait per step (both) during init */
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static void scsiabort __P((int, struct scsi_softc *,
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volatile struct scsidevice *, char *));
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static void scsierror __P((struct scsi_softc *,
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volatile struct scsidevice *, u_char));
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static int issue_select __P((volatile struct scsidevice *,
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u_char, u_char));
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static int wait_for_select __P((volatile struct scsidevice *));
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static int ixfer_start __P((volatile struct scsidevice *,
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int, u_char, int));
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static int ixfer_out __P((volatile struct scsidevice *, int, u_char *));
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static void ixfer_in __P((volatile struct scsidevice *, int, u_char *));
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static int mxfer_in __P((volatile struct scsidevice *,
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int, u_char *, u_char));
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static int scsiicmd __P((struct scsi_softc *, int, u_char *, int,
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u_char *, int, u_char));
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static void finishxfer __P((struct scsi_softc *,
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volatile struct scsidevice *, int));
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int scsimatch __P((struct device *, struct cfdata *, void *));
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void scsiattach __P((struct device *, struct device *, void *));
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void scsi_attach_children __P((struct scsi_softc *));
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int scsisubmatch __P((struct device *, struct cfdata *, void *));
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struct cfattach oscsi_ca = {
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sizeof(struct scsi_softc), scsimatch, scsiattach
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};
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extern struct cfdriver oscsi_cd;
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int scsi_cmd_wait = SCSI_CMD_WAIT;
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int scsi_data_wait = SCSI_DATA_WAIT;
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int scsi_init_wait = SCSI_INIT_WAIT;
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int scsi_nosync = 1; /* inhibit sync xfers if 1 */
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int scsi_pridma = 0; /* use "priority" dma */
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#ifdef DEBUG
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int scsi_debug = 0;
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#define WAITHIST
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#endif
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#ifdef WAITHIST
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#define MAXWAIT 1022
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u_int ixstart_wait[MAXWAIT+2];
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u_int ixin_wait[MAXWAIT+2];
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u_int ixout_wait[MAXWAIT+2];
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u_int mxin_wait[MAXWAIT+2];
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u_int mxin2_wait[MAXWAIT+2];
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u_int cxin_wait[MAXWAIT+2];
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u_int fxfr_wait[MAXWAIT+2];
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u_int sgo_wait[MAXWAIT+2];
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#define HIST(h,w) (++h[((w)>MAXWAIT? MAXWAIT : ((w) < 0 ? -1 : (w))) + 1]);
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#else
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#define HIST(h,w)
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#endif
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#define b_cylin b_resid
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static void
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scsiabort(target, hs, hd, where)
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int target;
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struct scsi_softc *hs;
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volatile struct scsidevice *hd;
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char *where;
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{
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int len;
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int maxtries; /* XXX - kludge till I understand whats *supposed* to happen */
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int startlen; /* XXX - kludge till I understand whats *supposed* to happen */
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u_char junk;
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printf("%s: ", hs->sc_dev.dv_xname);
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if (target != -1)
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printf("targ %d ", target);
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printf("abort from %s: phase=0x%x, ssts=0x%x, ints=0x%x\n",
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where, hd->scsi_psns, hd->scsi_ssts, hd->scsi_ints);
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hd->scsi_ints = hd->scsi_ints;
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hd->scsi_csr = 0;
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if (hd->scsi_psns == 0 || (hd->scsi_ssts & SSTS_INITIATOR) == 0)
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/* no longer connected to scsi target */
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return;
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/* get the number of bytes remaining in current xfer + fudge */
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len = (hd->scsi_tch << 16) | (hd->scsi_tcm << 8) | hd->scsi_tcl;
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/* for that many bus cycles, try to send an abort msg */
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for (startlen = (len += 1024); (hd->scsi_ssts & SSTS_INITIATOR) && --len >= 0; ) {
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hd->scsi_scmd = SCMD_SET_ATN;
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maxtries = 1000;
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while ((hd->scsi_psns & PSNS_REQ) == 0) {
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if (! (hd->scsi_ssts & SSTS_INITIATOR))
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goto out;
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DELAY(1);
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if (--maxtries == 0) {
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printf("-- scsiabort gave up after 1000 tries (startlen = %d len = %d)\n",
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startlen, len);
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goto out2;
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}
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}
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out2:
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if ((hd->scsi_psns & PHASE) == MESG_OUT_PHASE)
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hd->scsi_scmd = SCMD_RST_ATN;
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hd->scsi_pctl = hd->scsi_psns & PHASE;
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if (hd->scsi_psns & PHASE_IO) {
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/* one of the input phases - read & discard a byte */
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hd->scsi_scmd = SCMD_SET_ACK;
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if (hd->scsi_tmod == 0)
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while (hd->scsi_psns & PSNS_REQ)
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DELAY(1);
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junk = hd->scsi_temp;
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} else {
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/* one of the output phases - send an abort msg */
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hd->scsi_temp = MSG_ABORT;
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hd->scsi_scmd = SCMD_SET_ACK;
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if (hd->scsi_tmod == 0)
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while (hd->scsi_psns & PSNS_REQ)
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DELAY(1);
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}
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hd->scsi_scmd = SCMD_RST_ACK;
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}
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out:
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/*
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* Either the abort was successful & the bus is disconnected or
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* the device didn't listen. If the latter, announce the problem.
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* Either way, reset the card & the SPC.
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*/
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if (len < 0 && hs)
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printf("%s: abort failed. phase=0x%x, ssts=0x%x\n",
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hs->sc_dev.dv_xname, hd->scsi_psns, hd->scsi_ssts);
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if (! ((junk = hd->scsi_ints) & INTS_RESEL)) {
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hd->scsi_sctl |= SCTL_CTRLRST;
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DELAY(2);
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hd->scsi_sctl &=~ SCTL_CTRLRST;
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hd->scsi_hconf = 0;
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hd->scsi_ints = hd->scsi_ints;
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}
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}
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/*
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* XXX Set/reset long delays.
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*
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* if delay == 0, reset default delays
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* if delay < 0, set both delays to default long initialization values
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* if delay > 0, set both delays to this value
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*
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* Used when a devices is expected to respond slowly (e.g. during
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* initialization).
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*/
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void
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scsi_delay(delay)
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int delay;
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{
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static int saved_cmd_wait, saved_data_wait;
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if (delay) {
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saved_cmd_wait = scsi_cmd_wait;
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saved_data_wait = scsi_data_wait;
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if (delay > 0)
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scsi_cmd_wait = scsi_data_wait = delay;
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else
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scsi_cmd_wait = scsi_data_wait = scsi_init_wait;
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} else {
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scsi_cmd_wait = saved_cmd_wait;
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scsi_data_wait = saved_data_wait;
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}
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}
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int
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scsimatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct dio_attach_args *da = aux;
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switch (da->da_id) {
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case DIO_DEVICE_ID_SCSI0:
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case DIO_DEVICE_ID_SCSI1:
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case DIO_DEVICE_ID_SCSI2:
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case DIO_DEVICE_ID_SCSI3:
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return (1);
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}
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return (0);
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}
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void
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scsiattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct scsi_softc *hs = (struct scsi_softc *)self;
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struct dio_attach_args *da = aux;
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struct scsidevice *hd;
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int ipl, unit = self->dv_unit;
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/*
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* Set up DMA job queue entry.
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*/
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hs->sc_dq.dq_softc = hs;
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hs->sc_dq.dq_start = scsistart;
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hs->sc_dq.dq_done = scsidone;
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/* Initialize request queue. */
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TAILQ_INIT(&hs->sc_queue);
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/* Map the device. */
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hd = (struct scsidevice *)iomap(dio_scodetopa(da->da_scode),
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da->da_size);
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if (hd == NULL) {
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printf("\n%s: can't map registers\n", self->dv_xname);
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return;
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}
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ipl = DIO_IPL(hd);
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printf(" ipl %d", ipl);
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hs->sc_regs = hd;
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/* Establish the interrupt handler. */
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(void) dio_intr_establish(scsiintr, hs, ipl, IPL_BIO);
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/* Reset the controller. */
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scsireset(unit);
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/*
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* Print information about what we've found.
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*/
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printf(":");
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if (hs->sc_flags & SCSI_DMA32)
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printf(" 32 bit dma, ");
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switch (hs->sc_sync) {
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case 0:
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printf("async");
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break;
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case (TMOD_SYNC | 0x3e):
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printf("250ns sync");
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break;
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case (TMOD_SYNC | 0x5e):
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printf("375ns sync");
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break;
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case (TMOD_SYNC | 0x7d):
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printf("500ns sync");
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break;
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default:
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panic("scsiattach: unknown sync param 0x%x", hs->sc_sync);
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}
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if ((hd->scsi_hconf & HCONF_PARITY) == 0)
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printf(", no parity");
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printf(", scsi id %d\n", hs->sc_scsiid);
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/*
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* XXX scale initialization wait according to CPU speed.
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* Should we do this for all wait? Should we do this at all?
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*/
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scsi_init_wait *= (cpuspeed / 8);
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/*
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* Find and attach devices on the SCSI bus.
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*/
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scsi_attach_children(hs);
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}
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void
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scsi_attach_children(sc)
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struct scsi_softc *sc;
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{
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struct oscsi_attach_args osa;
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struct scsi_inquiry inqbuf;
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int target, lun;
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/*
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* Look for devices on the SCSI bus.
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*/
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for (target = 0; target < 8; target++) {
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/* Skip target used by controller. */
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if (target == sc->sc_scsiid)
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continue;
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for (lun = 0; lun < 1 /* XXX */; lun++) {
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bzero(&inqbuf, sizeof(inqbuf));
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if (scsi_probe_device(sc->sc_dev.dv_unit,
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target, lun, &inqbuf, sizeof(inqbuf))) {
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/*
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* XXX First command on some tapes
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* XXX always fails. (Or, at least,
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* XXX that's what the old Utah "st"
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* XXX driver claimed.)
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*/
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bzero(&inqbuf, sizeof(inqbuf));
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if (scsi_probe_device(sc->sc_dev.dv_unit,
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target, lun, &inqbuf, sizeof(inqbuf)))
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continue;
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}
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/*
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* There is a device here; find a driver
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* to match it.
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*/
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osa.osa_target = target;
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osa.osa_lun = lun;
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osa.osa_inqbuf = &inqbuf;
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(void)config_found_sm(&sc->sc_dev, &osa,
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scsi_print, scsisubmatch);
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}
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}
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}
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|
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int
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scsisubmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct oscsi_attach_args *osa = aux;
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if (match->cf_loc[OSCSICF_TARGET] != OSCSICF_TARGET_DEFAULT &&
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match->cf_loc[OSCSICF_TARGET] != osa->osa_target)
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return (0);
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if (match->cf_loc[OSCSICF_LUN] != OSCSICF_LUN_DEFAULT &&
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match->cf_loc[OSCSICF_LUN] != osa->osa_lun)
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return (0);
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return ((*match->cf_attach->ca_match)(parent, match, aux));
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}
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int
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scsi_print(aux, pnp)
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void *aux;
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const char *pnp;
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{
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struct oscsi_attach_args *osa = aux;
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struct scsi_inquiry *inqbuf = osa->osa_inqbuf;
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char vendor[9], product[17], revision[5];
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if (pnp == NULL)
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printf(" targ %d lun %d: ", osa->osa_target, osa->osa_lun);
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bzero(vendor, sizeof(vendor));
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bzero(product, sizeof(product));
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bzero(revision, sizeof(revision));
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switch (inqbuf->version) {
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case 1:
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case 2:
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scsi_str(inqbuf->vendor_id, vendor, sizeof(inqbuf->vendor_id));
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scsi_str(inqbuf->product_id, product,
|
|
sizeof(inqbuf->product_id));
|
|
scsi_str(inqbuf->rev, revision, sizeof(inqbuf->rev));
|
|
printf("<%s, %s, %s>", vendor, product, revision);
|
|
if (inqbuf->version == 2)
|
|
printf(" (SCSI-2)");
|
|
break;
|
|
default:
|
|
printf("type 0x%x, qual 0x%x, ver %d",
|
|
inqbuf->type, inqbuf->qual, inqbuf->version);
|
|
}
|
|
if (pnp != NULL)
|
|
printf(" at %s targ %d lun %d",
|
|
pnp, osa->osa_target, osa->osa_lun);
|
|
|
|
return (UNCONF);
|
|
}
|
|
|
|
void
|
|
scsireset(unit)
|
|
int unit;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[unit];
|
|
volatile struct scsidevice *hd = hs->sc_regs;
|
|
u_int i;
|
|
|
|
if (hs->sc_flags & SCSI_ALIVE)
|
|
scsiabort(-1, hs, hd, "reset");
|
|
|
|
hd->scsi_id = 0xFF;
|
|
DELAY(100);
|
|
/*
|
|
* Disable interrupts then reset the FUJI chip.
|
|
*/
|
|
hd->scsi_csr = 0;
|
|
hd->scsi_sctl = SCTL_DISABLE | SCTL_CTRLRST;
|
|
hd->scsi_scmd = 0;
|
|
hd->scsi_tmod = 0;
|
|
hd->scsi_pctl = 0;
|
|
hd->scsi_temp = 0;
|
|
hd->scsi_tch = 0;
|
|
hd->scsi_tcm = 0;
|
|
hd->scsi_tcl = 0;
|
|
hd->scsi_ints = 0;
|
|
|
|
if ((hd->scsi_id & ID_WORD_DMA) == 0)
|
|
hs->sc_flags |= SCSI_DMA32;
|
|
|
|
/* Determine Max Synchronous Transfer Rate */
|
|
if (scsi_nosync)
|
|
i = 3;
|
|
else
|
|
i = SCSI_SYNC_XFER(hd->scsi_hconf);
|
|
switch (i) {
|
|
case 0:
|
|
hs->sc_sync = TMOD_SYNC | 0x3e; /* 250 nsecs */
|
|
break;
|
|
case 1:
|
|
hs->sc_sync = TMOD_SYNC | 0x5e; /* 375 nsecs */
|
|
break;
|
|
case 2:
|
|
hs->sc_sync = TMOD_SYNC | 0x7d; /* 500 nsecs */
|
|
break;
|
|
case 3:
|
|
hs->sc_sync = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Configure the FUJI chip with its SCSI address, all
|
|
* interrupts enabled & appropriate parity.
|
|
*/
|
|
i = (~hd->scsi_hconf) & 0x7;
|
|
hs->sc_scsi_addr = 1 << i;
|
|
hd->scsi_bdid = i;
|
|
hs->sc_scsiid = i;
|
|
if (hd->scsi_hconf & HCONF_PARITY)
|
|
hd->scsi_sctl = SCTL_DISABLE | SCTL_ABRT_ENAB |
|
|
SCTL_SEL_ENAB | SCTL_RESEL_ENAB |
|
|
SCTL_INTR_ENAB | SCTL_PARITY_ENAB;
|
|
else
|
|
hd->scsi_sctl = SCTL_DISABLE | SCTL_ABRT_ENAB |
|
|
SCTL_SEL_ENAB | SCTL_RESEL_ENAB |
|
|
SCTL_INTR_ENAB;
|
|
|
|
hd->scsi_sctl &=~ SCTL_DISABLE;
|
|
hs->sc_flags |= SCSI_ALIVE;
|
|
}
|
|
|
|
static void
|
|
scsierror(hs, hd, ints)
|
|
struct scsi_softc *hs;
|
|
volatile struct scsidevice *hd;
|
|
u_char ints;
|
|
{
|
|
char *sep = "";
|
|
|
|
printf("%s: ", hs->sc_dev.dv_xname);
|
|
if (ints & INTS_RST) {
|
|
DELAY(100);
|
|
if (hd->scsi_hconf & HCONF_SD)
|
|
printf("spurious RST interrupt");
|
|
else
|
|
printf("hardware error - check fuse");
|
|
sep = ", ";
|
|
}
|
|
if ((ints & INTS_HARD_ERR) || hd->scsi_serr) {
|
|
if (hd->scsi_serr & SERR_SCSI_PAR) {
|
|
printf("%sparity err", sep);
|
|
sep = ", ";
|
|
}
|
|
if (hd->scsi_serr & SERR_SPC_PAR) {
|
|
printf("%sSPC parity err", sep);
|
|
sep = ", ";
|
|
}
|
|
if (hd->scsi_serr & SERR_TC_PAR) {
|
|
printf("%sTC parity err", sep);
|
|
sep = ", ";
|
|
}
|
|
if (hd->scsi_serr & SERR_PHASE_ERR) {
|
|
printf("%sphase err", sep);
|
|
sep = ", ";
|
|
}
|
|
if (hd->scsi_serr & SERR_SHORT_XFR) {
|
|
printf("%ssync short transfer err", sep);
|
|
sep = ", ";
|
|
}
|
|
if (hd->scsi_serr & SERR_OFFSET) {
|
|
printf("%ssync offset error", sep);
|
|
sep = ", ";
|
|
}
|
|
}
|
|
if (ints & INTS_TIMEOUT)
|
|
printf("%sSPC select timeout error", sep);
|
|
if (ints & INTS_SRV_REQ)
|
|
printf("%sspurious SRV_REQ interrupt", sep);
|
|
if (ints & INTS_CMD_DONE)
|
|
printf("%sspurious CMD_DONE interrupt", sep);
|
|
if (ints & INTS_DISCON)
|
|
printf("%sspurious disconnect interrupt", sep);
|
|
if (ints & INTS_RESEL)
|
|
printf("%sspurious reselect interrupt", sep);
|
|
if (ints & INTS_SEL)
|
|
printf("%sspurious select interrupt", sep);
|
|
printf("\n");
|
|
}
|
|
|
|
static int
|
|
issue_select(hd, target, our_addr)
|
|
volatile struct scsidevice *hd;
|
|
u_char target, our_addr;
|
|
{
|
|
if (hd->scsi_ssts & (SSTS_INITIATOR|SSTS_TARGET|SSTS_BUSY))
|
|
return (1);
|
|
|
|
if (hd->scsi_ints & INTS_DISCON)
|
|
hd->scsi_ints = INTS_DISCON;
|
|
|
|
hd->scsi_pctl = 0;
|
|
hd->scsi_temp = (1 << target) | our_addr;
|
|
/* select timeout is hardcoded to 2ms */
|
|
hd->scsi_tch = 0;
|
|
hd->scsi_tcm = 32;
|
|
hd->scsi_tcl = 4;
|
|
|
|
hd->scsi_scmd = SCMD_SELECT;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
wait_for_select(hd)
|
|
volatile struct scsidevice *hd;
|
|
{
|
|
u_char ints;
|
|
|
|
while ((ints = hd->scsi_ints) == 0)
|
|
DELAY(1);
|
|
hd->scsi_ints = ints;
|
|
return (!(hd->scsi_ssts & SSTS_INITIATOR));
|
|
}
|
|
|
|
static int
|
|
ixfer_start(hd, len, phase, wait)
|
|
volatile struct scsidevice *hd;
|
|
int len;
|
|
u_char phase;
|
|
int wait;
|
|
{
|
|
|
|
hd->scsi_tch = len >> 16;
|
|
hd->scsi_tcm = len >> 8;
|
|
hd->scsi_tcl = len;
|
|
hd->scsi_pctl = phase;
|
|
hd->scsi_tmod = 0; /*XXX*/
|
|
hd->scsi_scmd = SCMD_XFR | SCMD_PROG_XFR;
|
|
|
|
/* wait for xfer to start or svc_req interrupt */
|
|
while ((hd->scsi_ssts & SSTS_BUSY) == 0) {
|
|
if (hd->scsi_ints || --wait < 0) {
|
|
#ifdef DEBUG
|
|
if (scsi_debug)
|
|
printf("ixfer_start fail: i%x, w%d\n",
|
|
hd->scsi_ints, wait);
|
|
#endif
|
|
HIST(ixstart_wait, wait)
|
|
return (0);
|
|
}
|
|
DELAY(1);
|
|
}
|
|
HIST(ixstart_wait, wait)
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
ixfer_out(hd, len, buf)
|
|
volatile struct scsidevice *hd;
|
|
int len;
|
|
u_char *buf;
|
|
{
|
|
int wait = scsi_data_wait;
|
|
|
|
for (; len > 0; --len) {
|
|
while (hd->scsi_ssts & SSTS_DREG_FULL) {
|
|
if (hd->scsi_ints || --wait < 0) {
|
|
#ifdef DEBUG
|
|
if (scsi_debug)
|
|
printf("ixfer_out fail: l%d i%x w%d\n",
|
|
len, hd->scsi_ints, wait);
|
|
#endif
|
|
HIST(ixout_wait, wait)
|
|
return (len);
|
|
}
|
|
DELAY(1);
|
|
}
|
|
hd->scsi_dreg = *buf++;
|
|
}
|
|
HIST(ixout_wait, wait)
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ixfer_in(hd, len, buf)
|
|
volatile struct scsidevice *hd;
|
|
int len;
|
|
u_char *buf;
|
|
{
|
|
int wait = scsi_data_wait;
|
|
|
|
for (; len > 0; --len) {
|
|
while (hd->scsi_ssts & SSTS_DREG_EMPTY) {
|
|
if (hd->scsi_ints || --wait < 0) {
|
|
while (! (hd->scsi_ssts & SSTS_DREG_EMPTY)) {
|
|
*buf++ = hd->scsi_dreg;
|
|
--len;
|
|
}
|
|
#ifdef DEBUG
|
|
if (scsi_debug)
|
|
printf("ixfer_in fail: l%d i%x w%d\n",
|
|
len, hd->scsi_ints, wait);
|
|
#endif
|
|
HIST(ixin_wait, wait)
|
|
return;
|
|
}
|
|
DELAY(1);
|
|
}
|
|
*buf++ = hd->scsi_dreg;
|
|
}
|
|
HIST(ixin_wait, wait)
|
|
}
|
|
|
|
static int
|
|
mxfer_in(hd, len, buf, phase)
|
|
volatile struct scsidevice *hd;
|
|
int len;
|
|
u_char *buf;
|
|
u_char phase;
|
|
{
|
|
int wait = scsi_cmd_wait;
|
|
int i;
|
|
|
|
hd->scsi_tmod = 0;
|
|
for (i = 0; i < len; ++i) {
|
|
/*
|
|
* manual sez: reset ATN before ACK is sent.
|
|
*/
|
|
if (hd->scsi_psns & PSNS_ATN)
|
|
hd->scsi_scmd = SCMD_RST_ATN;
|
|
/*
|
|
* wait for the request line (which says the target
|
|
* wants to give us data). If the phase changes while
|
|
* we're waiting, we're done.
|
|
*/
|
|
while ((hd->scsi_psns & PSNS_REQ) == 0) {
|
|
if (--wait < 0) {
|
|
HIST(mxin_wait, wait)
|
|
return (-1);
|
|
}
|
|
if ((hd->scsi_psns & PHASE) != phase ||
|
|
(hd->scsi_ssts & SSTS_INITIATOR) == 0)
|
|
goto out;
|
|
|
|
DELAY(1);
|
|
}
|
|
/*
|
|
* set ack (which says we're ready for the data, wait for
|
|
* req to go away (target says data is available), grab the
|
|
* data, then reset ack (say we've got the data).
|
|
*/
|
|
hd->scsi_pctl = phase;
|
|
hd->scsi_scmd = SCMD_SET_ACK;
|
|
while (hd->scsi_psns & PSNS_REQ) {
|
|
if (--wait < 0) {
|
|
HIST(mxin_wait, wait)
|
|
return (-2);
|
|
}
|
|
DELAY(1);
|
|
}
|
|
*buf++ = hd->scsi_temp;
|
|
hd->scsi_scmd = SCMD_RST_ACK;
|
|
}
|
|
out:
|
|
HIST(mxin_wait, wait)
|
|
/*
|
|
* Wait for manual transfer to finish.
|
|
* Avoids occasional "unexpected phase" errors in finishxfer
|
|
* formerly addressed by per-slave delays.
|
|
*/
|
|
wait = scsi_cmd_wait;
|
|
while ((hd->scsi_ssts & SSTS_ACTIVE) == SSTS_INITIATOR) {
|
|
if (--wait < 0)
|
|
break;
|
|
DELAY(1);
|
|
}
|
|
HIST(mxin2_wait, wait)
|
|
return (i);
|
|
}
|
|
|
|
/*
|
|
* SCSI 'immediate' command: issue a command to some SCSI device
|
|
* and get back an 'immediate' response (i.e., do programmed xfer
|
|
* to get the response data). 'cbuf' is a buffer containing a scsi
|
|
* command of length clen bytes. 'buf' is a buffer of length 'len'
|
|
* bytes for data. The transfer direction is determined by the device
|
|
* (i.e., by the scsi bus data xfer phase). If 'len' is zero, the
|
|
* command must supply no data. 'xferphase' is the bus phase the
|
|
* caller expects to happen after the command is issued. It should
|
|
* be one of DATA_IN_PHASE, DATA_OUT_PHASE or STATUS_PHASE.
|
|
*/
|
|
static int
|
|
scsiicmd(hs, target, cbuf, clen, buf, len, xferphase)
|
|
struct scsi_softc *hs;
|
|
int target;
|
|
u_char *cbuf;
|
|
int clen;
|
|
u_char *buf;
|
|
int len;
|
|
u_char xferphase;
|
|
{
|
|
volatile struct scsidevice *hd = hs->sc_regs;
|
|
u_char phase, ints;
|
|
int wait;
|
|
|
|
/* select the SCSI bus (it's an error if bus isn't free) */
|
|
if (issue_select(hd, target, hs->sc_scsi_addr))
|
|
return (-1);
|
|
if (wait_for_select(hd))
|
|
return (-1);
|
|
/*
|
|
* Wait for a phase change (or error) then let the device
|
|
* sequence us through the various SCSI phases.
|
|
*/
|
|
hs->sc_stat[0] = 0xff;
|
|
hs->sc_msg[0] = 0xff;
|
|
phase = CMD_PHASE;
|
|
while (1) {
|
|
wait = scsi_cmd_wait;
|
|
switch (phase) {
|
|
|
|
case CMD_PHASE:
|
|
if (ixfer_start(hd, clen, phase, wait))
|
|
if (ixfer_out(hd, clen, cbuf))
|
|
goto abort;
|
|
phase = xferphase;
|
|
break;
|
|
|
|
case DATA_IN_PHASE:
|
|
if (len <= 0)
|
|
goto abort;
|
|
wait = scsi_data_wait;
|
|
if (ixfer_start(hd, len, phase, wait) ||
|
|
!(hd->scsi_ssts & SSTS_DREG_EMPTY))
|
|
ixfer_in(hd, len, buf);
|
|
phase = STATUS_PHASE;
|
|
break;
|
|
|
|
case DATA_OUT_PHASE:
|
|
if (len <= 0)
|
|
goto abort;
|
|
wait = scsi_data_wait;
|
|
if (ixfer_start(hd, len, phase, wait)) {
|
|
if (ixfer_out(hd, len, buf))
|
|
goto abort;
|
|
}
|
|
phase = STATUS_PHASE;
|
|
break;
|
|
|
|
case STATUS_PHASE:
|
|
wait = scsi_data_wait;
|
|
if (ixfer_start(hd, sizeof(hs->sc_stat), phase, wait) ||
|
|
!(hd->scsi_ssts & SSTS_DREG_EMPTY))
|
|
ixfer_in(hd, sizeof(hs->sc_stat), hs->sc_stat);
|
|
phase = MESG_IN_PHASE;
|
|
break;
|
|
|
|
case MESG_IN_PHASE:
|
|
if (ixfer_start(hd, sizeof(hs->sc_msg), phase, wait) ||
|
|
!(hd->scsi_ssts & SSTS_DREG_EMPTY)) {
|
|
ixfer_in(hd, sizeof(hs->sc_msg), hs->sc_msg);
|
|
hd->scsi_scmd = SCMD_RST_ACK;
|
|
}
|
|
phase = BUS_FREE_PHASE;
|
|
break;
|
|
|
|
case BUS_FREE_PHASE:
|
|
goto out;
|
|
|
|
default:
|
|
printf("%s: unexpected phase %d in icmd from %d\n",
|
|
hs->sc_dev.dv_xname, phase, target);
|
|
goto abort;
|
|
}
|
|
/* wait for last command to complete */
|
|
while ((ints = hd->scsi_ints) == 0) {
|
|
if (--wait < 0) {
|
|
HIST(cxin_wait, wait)
|
|
goto abort;
|
|
}
|
|
DELAY(1);
|
|
}
|
|
HIST(cxin_wait, wait)
|
|
hd->scsi_ints = ints;
|
|
if (ints & INTS_SRV_REQ)
|
|
phase = hd->scsi_psns & PHASE;
|
|
else if (ints & INTS_DISCON)
|
|
goto out;
|
|
else if ((ints & INTS_CMD_DONE) == 0) {
|
|
scsierror(hs, hd, ints);
|
|
goto abort;
|
|
}
|
|
}
|
|
abort:
|
|
scsiabort(target, hs, hd, "icmd");
|
|
out:
|
|
return (hs->sc_stat[0]);
|
|
}
|
|
|
|
/*
|
|
* Finish SCSI xfer command: After the completion interrupt from
|
|
* a read/write operation, sequence through the final phases in
|
|
* programmed i/o. This routine is a lot like scsiicmd except we
|
|
* skip (and don't allow) the select, cmd out and data in/out phases.
|
|
*/
|
|
static void
|
|
finishxfer(hs, hd, target)
|
|
struct scsi_softc *hs;
|
|
volatile struct scsidevice *hd;
|
|
int target;
|
|
{
|
|
u_char phase, ints;
|
|
|
|
/*
|
|
* We specified padding xfer so we ended with either a phase
|
|
* change interrupt (normal case) or an error interrupt (handled
|
|
* elsewhere). Reset the board dma logic then try to get the
|
|
* completion status & command done msg. The reset confuses
|
|
* the SPC REQ/ACK logic so we have to do any status/msg input
|
|
* operations via 'manual xfer'.
|
|
*/
|
|
if (hd->scsi_ssts & SSTS_BUSY) {
|
|
int wait = scsi_cmd_wait;
|
|
|
|
/* wait for dma operation to finish */
|
|
while (hd->scsi_ssts & SSTS_BUSY) {
|
|
if (--wait < 0) {
|
|
#ifdef DEBUG
|
|
if (scsi_debug)
|
|
printf("finishxfer fail: ssts %x\n",
|
|
hd->scsi_ssts);
|
|
#endif
|
|
HIST(fxfr_wait, wait)
|
|
goto abort;
|
|
}
|
|
}
|
|
HIST(fxfr_wait, wait)
|
|
}
|
|
hd->scsi_scmd |= SCMD_PROG_XFR;
|
|
hd->scsi_sctl |= SCTL_CTRLRST;
|
|
DELAY(2);
|
|
hd->scsi_sctl &=~ SCTL_CTRLRST;
|
|
hd->scsi_hconf = 0;
|
|
/*
|
|
* The following delay is definitely needed when trying to
|
|
* write on a write protected disk (in the optical jukebox anyways),
|
|
* but we shall see if other unexplained machine freezeups
|
|
* also stop occuring... A value of 5 seems to work but
|
|
* 10 seems safer considering the potential consequences.
|
|
*/
|
|
DELAY(10);
|
|
hs->sc_stat[0] = 0xff;
|
|
hs->sc_msg[0] = 0xff;
|
|
hd->scsi_csr = 0;
|
|
hd->scsi_ints = ints = hd->scsi_ints;
|
|
while (1) {
|
|
phase = hd->scsi_psns & PHASE;
|
|
switch (phase) {
|
|
|
|
case STATUS_PHASE:
|
|
if (mxfer_in(hd, sizeof(hs->sc_stat),
|
|
(u_char *)hs->sc_stat, phase) <= 0)
|
|
goto abort;
|
|
break;
|
|
|
|
case MESG_IN_PHASE:
|
|
if (mxfer_in(hd, sizeof(hs->sc_msg),
|
|
(u_char *)hs->sc_msg, phase) < 0)
|
|
goto abort;
|
|
break;
|
|
|
|
case BUS_FREE_PHASE:
|
|
return;
|
|
|
|
default:
|
|
printf("%s: unexpected phase %d in finishxfer from %d\n",
|
|
hs->sc_dev.dv_xname, phase, target);
|
|
goto abort;
|
|
}
|
|
if ((ints = hd->scsi_ints)) {
|
|
hd->scsi_ints = ints;
|
|
if (ints & INTS_DISCON)
|
|
return;
|
|
else if (ints & ~(INTS_SRV_REQ|INTS_CMD_DONE)) {
|
|
scsierror(hs, hd, ints);
|
|
break;
|
|
}
|
|
}
|
|
if ((hd->scsi_ssts & SSTS_INITIATOR) == 0)
|
|
return;
|
|
}
|
|
abort:
|
|
scsiabort(target, hs, hd, "finishxfer");
|
|
hs->sc_stat[0] = 0xfe;
|
|
}
|
|
|
|
int
|
|
scsi_test_unit_rdy(ctlr, slave, unit)
|
|
int ctlr, slave, unit;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
static struct scsi_cdb6 cdb = { CMD_TEST_UNIT_READY };
|
|
|
|
cdb.lun = unit;
|
|
return (scsiicmd(hs, slave, (u_char *)&cdb, sizeof(cdb),
|
|
(u_char *)0, 0, STATUS_PHASE));
|
|
}
|
|
|
|
int
|
|
scsi_request_sense(ctlr, slave, unit, buf, len)
|
|
int ctlr, slave, unit;
|
|
u_char *buf;
|
|
u_int len;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
static struct scsi_cdb6 cdb = { CMD_REQUEST_SENSE };
|
|
|
|
cdb.lun = unit;
|
|
cdb.len = len;
|
|
return (scsiicmd(hs, slave, (u_char *)&cdb, sizeof(cdb),
|
|
buf, len, DATA_IN_PHASE));
|
|
}
|
|
|
|
int
|
|
scsi_immed_command(ctlr, slave, unit, cdb, buf, len, rd)
|
|
int ctlr, slave, unit, rd;
|
|
struct scsi_fmt_cdb *cdb;
|
|
u_char *buf;
|
|
u_int len;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
|
|
cdb->cdb[1] |= unit << 5;
|
|
return (scsiicmd(hs, slave, cdb->cdb, cdb->len, buf, len,
|
|
rd != 0? DATA_IN_PHASE : DATA_OUT_PHASE));
|
|
}
|
|
|
|
/*
|
|
* The following routines are test-and-transfer i/o versions of read/write
|
|
* for things like reading disk labels and writing core dumps. The
|
|
* routine scsigo should be used for normal data transfers, NOT these
|
|
* routines.
|
|
*/
|
|
int
|
|
scsi_tt_read(ctlr, slave, unit, buf, len, blk, bshift)
|
|
int ctlr, slave, unit;
|
|
u_char *buf;
|
|
u_int len;
|
|
daddr_t blk;
|
|
int bshift;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
struct scsi_cdb10 cdb;
|
|
int stat;
|
|
int old_wait = scsi_data_wait;
|
|
|
|
scsi_data_wait = 300000;
|
|
bzero(&cdb, sizeof(cdb));
|
|
cdb.cmd = CMD_READ_EXT;
|
|
cdb.lun = unit;
|
|
blk >>= bshift;
|
|
cdb.lbah = blk >> 24;
|
|
cdb.lbahm = blk >> 16;
|
|
cdb.lbalm = blk >> 8;
|
|
cdb.lbal = blk;
|
|
cdb.lenh = len >> (8 + DEV_BSHIFT + bshift);
|
|
cdb.lenl = len >> (DEV_BSHIFT + bshift);
|
|
stat = scsiicmd(hs, slave, (u_char *)&cdb, sizeof(cdb),
|
|
buf, len, DATA_IN_PHASE);
|
|
scsi_data_wait = old_wait;
|
|
return (stat);
|
|
}
|
|
|
|
int
|
|
scsi_tt_write(ctlr, slave, unit, buf, len, blk, bshift)
|
|
int ctlr, slave, unit;
|
|
u_char *buf;
|
|
u_int len;
|
|
daddr_t blk;
|
|
int bshift;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
struct scsi_cdb10 cdb;
|
|
int stat;
|
|
int old_wait = scsi_data_wait;
|
|
|
|
scsi_data_wait = 300000;
|
|
|
|
bzero(&cdb, sizeof(cdb));
|
|
cdb.cmd = CMD_WRITE_EXT;
|
|
cdb.lun = unit;
|
|
blk >>= bshift;
|
|
cdb.lbah = blk >> 24;
|
|
cdb.lbahm = blk >> 16;
|
|
cdb.lbalm = blk >> 8;
|
|
cdb.lbal = blk;
|
|
cdb.lenh = len >> (8 + DEV_BSHIFT + bshift);
|
|
cdb.lenl = len >> (DEV_BSHIFT + bshift);
|
|
stat = scsiicmd(hs, slave, (u_char *)&cdb, sizeof(cdb),
|
|
buf, len, DATA_OUT_PHASE);
|
|
scsi_data_wait = old_wait;
|
|
return (stat);
|
|
}
|
|
|
|
int
|
|
scsireq(pdev, sq)
|
|
struct device *pdev;
|
|
struct scsiqueue *sq;
|
|
{
|
|
struct scsi_softc *hs = (struct scsi_softc *)pdev;
|
|
int s;
|
|
|
|
s = splhigh(); /* XXXthorpej */
|
|
TAILQ_INSERT_TAIL(&hs->sc_queue, sq, sq_list);
|
|
splx(s);
|
|
|
|
if (hs->sc_queue.tqh_first == sq)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
scsiustart(unit)
|
|
int unit;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[unit];
|
|
|
|
hs->sc_dq.dq_chan = DMA0 | DMA1;
|
|
hs->sc_flags |= SCSI_HAVEDMA;
|
|
if (dmareq(&hs->sc_dq))
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
void
|
|
scsistart(arg)
|
|
void *arg;
|
|
{
|
|
struct scsi_softc *hs = arg;
|
|
struct scsiqueue *sq;
|
|
|
|
sq = hs->sc_queue.tqh_first;
|
|
(sq->sq_go)(sq->sq_softc);
|
|
}
|
|
|
|
int
|
|
scsigo(ctlr, slave, unit, bp, cdb, pad)
|
|
int ctlr, slave, unit;
|
|
struct buf *bp;
|
|
struct scsi_fmt_cdb *cdb;
|
|
int pad;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
volatile struct scsidevice *hd = hs->sc_regs;
|
|
int i, dmaflags;
|
|
u_char phase, ints, cmd;
|
|
|
|
cdb->cdb[1] |= unit << 5;
|
|
|
|
/* select the SCSI bus (it's an error if bus isn't free) */
|
|
if (issue_select(hd, slave, hs->sc_scsi_addr) || wait_for_select(hd)) {
|
|
if (hs->sc_flags & SCSI_HAVEDMA) {
|
|
hs->sc_flags &=~ SCSI_HAVEDMA;
|
|
dmafree(&hs->sc_dq);
|
|
}
|
|
return (1);
|
|
}
|
|
/*
|
|
* Wait for a phase change (or error) then let the device
|
|
* sequence us through command phase (we may have to take
|
|
* a msg in/out before doing the command). If the disk has
|
|
* to do a seek, it may be a long time until we get a change
|
|
* to data phase so, in the absense of an explicit phase
|
|
* change, we assume data phase will be coming up and tell
|
|
* the SPC to start a transfer whenever it does. We'll get
|
|
* a service required interrupt later if this assumption is
|
|
* wrong. Otherwise we'll get a service required int when
|
|
* the transfer changes to status phase.
|
|
*/
|
|
phase = CMD_PHASE;
|
|
while (1) {
|
|
int wait = scsi_cmd_wait;
|
|
|
|
switch (phase) {
|
|
|
|
case CMD_PHASE:
|
|
if (ixfer_start(hd, cdb->len, phase, wait))
|
|
if (ixfer_out(hd, cdb->len, cdb->cdb))
|
|
goto abort;
|
|
break;
|
|
|
|
case MESG_IN_PHASE:
|
|
if (ixfer_start(hd, sizeof(hs->sc_msg), phase, wait)||
|
|
!(hd->scsi_ssts & SSTS_DREG_EMPTY)) {
|
|
ixfer_in(hd, sizeof(hs->sc_msg), hs->sc_msg);
|
|
hd->scsi_scmd = SCMD_RST_ACK;
|
|
}
|
|
phase = BUS_FREE_PHASE;
|
|
break;
|
|
|
|
case DATA_IN_PHASE:
|
|
case DATA_OUT_PHASE:
|
|
goto out;
|
|
|
|
default:
|
|
printf("%s: unexpected phase %d in go from %d\n",
|
|
hs->sc_dev.dv_xname, phase, slave);
|
|
goto abort;
|
|
}
|
|
while ((ints = hd->scsi_ints) == 0) {
|
|
if (--wait < 0) {
|
|
HIST(sgo_wait, wait)
|
|
goto abort;
|
|
}
|
|
DELAY(1);
|
|
}
|
|
HIST(sgo_wait, wait)
|
|
hd->scsi_ints = ints;
|
|
if (ints & INTS_SRV_REQ)
|
|
phase = hd->scsi_psns & PHASE;
|
|
else if (ints & INTS_CMD_DONE)
|
|
goto out;
|
|
else {
|
|
scsierror(hs, hd, ints);
|
|
goto abort;
|
|
}
|
|
}
|
|
out:
|
|
/*
|
|
* Reset the card dma logic, setup the dma channel then
|
|
* get the dio part of the card set for a dma xfer.
|
|
*/
|
|
hd->scsi_hconf = 0;
|
|
cmd = CSR_IE;
|
|
dmaflags = DMAGO_NOINT;
|
|
if (scsi_pridma)
|
|
dmaflags |= DMAGO_PRI;
|
|
if (bp->b_flags & B_READ)
|
|
dmaflags |= DMAGO_READ;
|
|
if ((hs->sc_flags & SCSI_DMA32) &&
|
|
((int)bp->b_un.b_addr & 3) == 0 && (bp->b_bcount & 3) == 0) {
|
|
cmd |= CSR_DMA32;
|
|
dmaflags |= DMAGO_LWORD;
|
|
} else
|
|
dmaflags |= DMAGO_WORD;
|
|
dmago(hs->sc_dq.dq_chan, bp->b_un.b_addr, bp->b_bcount, dmaflags);
|
|
|
|
if (bp->b_flags & B_READ) {
|
|
cmd |= CSR_DMAIN;
|
|
phase = DATA_IN_PHASE;
|
|
} else
|
|
phase = DATA_OUT_PHASE;
|
|
/*
|
|
* DMA enable bits must be set after size and direction bits.
|
|
*/
|
|
hd->scsi_csr = cmd;
|
|
hd->scsi_csr |= (CSR_DE0 << hs->sc_dq.dq_chan);
|
|
/*
|
|
* Setup the SPC for the transfer. We don't want to take
|
|
* first a command complete then a service required interrupt
|
|
* at the end of the transfer so we try to disable the cmd
|
|
* complete by setting the transfer counter to more bytes
|
|
* than we expect. (XXX - This strategy may have to be
|
|
* modified to deal with devices that return variable length
|
|
* blocks, e.g., some tape drives.)
|
|
*/
|
|
cmd = SCMD_XFR;
|
|
i = (unsigned)bp->b_bcount;
|
|
if (pad) {
|
|
cmd |= SCMD_PAD;
|
|
/*
|
|
* XXX - If we don't do this, the last 2 or 4 bytes
|
|
* (depending on word/lword DMA) of a read get trashed.
|
|
* It looks like it is necessary for the DMA to complete
|
|
* before the SPC goes into "pad mode"??? Note: if we
|
|
* also do this on a write, the request never completes.
|
|
*/
|
|
if (bp->b_flags & B_READ)
|
|
i += 2;
|
|
#ifdef DEBUG
|
|
hs->sc_flags |= SCSI_PAD;
|
|
if (i & 1)
|
|
printf("%s: odd byte count: %d bytes @ %ld\n",
|
|
hs->sc_dev.dv_xname, i, bp->b_cylin);
|
|
#endif
|
|
} else
|
|
i += 4;
|
|
hd->scsi_tch = i >> 16;
|
|
hd->scsi_tcm = i >> 8;
|
|
hd->scsi_tcl = i;
|
|
hd->scsi_pctl = phase;
|
|
hd->scsi_tmod = 0;
|
|
hd->scsi_scmd = cmd;
|
|
hs->sc_flags |= SCSI_IO;
|
|
return (0);
|
|
abort:
|
|
scsiabort(slave, hs, hd, "go");
|
|
hs->sc_flags &=~ SCSI_HAVEDMA;
|
|
dmafree(&hs->sc_dq);
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
scsidone(arg)
|
|
void *arg;
|
|
{
|
|
struct scsi_softc *hs = arg;
|
|
volatile struct scsidevice *hd = hs->sc_regs;
|
|
|
|
#ifdef DEBUG
|
|
if (scsi_debug)
|
|
printf("%s: done called!\n", hs->sc_dev.dv_xname);
|
|
#endif
|
|
/* dma operation is done -- turn off card dma */
|
|
hd->scsi_csr &=~ (CSR_DE1|CSR_DE0);
|
|
}
|
|
|
|
int
|
|
scsiintr(arg)
|
|
void *arg;
|
|
{
|
|
struct scsi_softc *hs = arg;
|
|
volatile struct scsidevice *hd = hs->sc_regs;
|
|
u_char ints;
|
|
struct scsiqueue *sq;
|
|
|
|
if ((hd->scsi_csr & (CSR_IE|CSR_IR)) != (CSR_IE|CSR_IR))
|
|
return (0);
|
|
|
|
sq = hs->sc_queue.tqh_first;
|
|
|
|
ints = hd->scsi_ints;
|
|
if ((ints & INTS_SRV_REQ) && (hs->sc_flags & SCSI_IO)) {
|
|
/*
|
|
* this should be the normal i/o completion case.
|
|
* get the status & cmd complete msg then let the
|
|
* device driver look at what happened.
|
|
*/
|
|
#ifdef DEBUG
|
|
int len = (hd->scsi_tch << 16) | (hd->scsi_tcm << 8) |
|
|
hd->scsi_tcl;
|
|
if (!(hs->sc_flags & SCSI_PAD))
|
|
len -= 4;
|
|
hs->sc_flags &=~ SCSI_PAD;
|
|
#endif
|
|
finishxfer(hs, hd, sq->sq_target);
|
|
hs->sc_flags &=~ (SCSI_IO|SCSI_HAVEDMA);
|
|
dmafree(&hs->sc_dq);
|
|
(sq->sq_intr)(sq->sq_softc, hs->sc_stat[0]);
|
|
} else {
|
|
/* Something unexpected happened -- deal with it. */
|
|
hd->scsi_ints = ints;
|
|
hd->scsi_csr = 0;
|
|
scsierror(hs, hd, ints);
|
|
scsiabort(sq->sq_target, hs, hd, "intr");
|
|
if (hs->sc_flags & SCSI_IO) {
|
|
hs->sc_flags &=~ (SCSI_IO|SCSI_HAVEDMA);
|
|
dmafree(&hs->sc_dq);
|
|
(sq->sq_intr)(sq->sq_softc, -1);
|
|
}
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
void
|
|
scsifree(pdev, sq)
|
|
struct device *pdev;
|
|
struct scsiqueue *sq;
|
|
{
|
|
struct scsi_softc *hs = (struct scsi_softc *)pdev;
|
|
int s;
|
|
|
|
s = splhigh(); /* XXXthorpej */
|
|
TAILQ_REMOVE(&hs->sc_queue, sq, sq_list);
|
|
splx(s);
|
|
|
|
if ((sq = hs->sc_queue.tqh_first) != NULL)
|
|
(*sq->sq_start)(sq->sq_softc);
|
|
}
|
|
|
|
/*
|
|
* (XXX) The following routine is needed for the SCSI tape driver
|
|
* to read odd-size records.
|
|
*/
|
|
|
|
#include "st.h"
|
|
#if NST > 0
|
|
int
|
|
scsi_tt_oddio(ctlr, slave, unit, buf, len, b_flags, freedma)
|
|
int ctlr, slave, unit, b_flags, freedma;
|
|
u_char *buf;
|
|
u_int len;
|
|
{
|
|
struct scsi_softc *hs = oscsi_cd.cd_devs[ctlr];
|
|
struct scsi_cdb6 cdb;
|
|
u_char iphase;
|
|
int stat;
|
|
|
|
#ifdef DEBUG
|
|
if ((freedma && (hs->sc_flags & SCSI_HAVEDMA) == 0) ||
|
|
(!freedma && (hs->sc_flags & SCSI_HAVEDMA)))
|
|
printf("oddio: freedma (%d) inconsistency (flags=%x)\n",
|
|
freedma, hs->sc_flags);
|
|
#endif
|
|
/*
|
|
* First free any DMA channel that was allocated.
|
|
* We can't use DMA to do this transfer.
|
|
*/
|
|
if (freedma) {
|
|
hs->sc_flags &=~ SCSI_HAVEDMA;
|
|
dmafree(&hs->sc_dq);
|
|
}
|
|
/*
|
|
* Initialize command block
|
|
*/
|
|
bzero(&cdb, sizeof(cdb));
|
|
cdb.lun = unit;
|
|
cdb.lbam = (len >> 16) & 0xff;
|
|
cdb.lbal = (len >> 8) & 0xff;
|
|
cdb.len = len & 0xff;
|
|
if (buf == 0) {
|
|
cdb.cmd = CMD_SPACE;
|
|
cdb.lun |= 0x00;
|
|
len = 0;
|
|
iphase = MESG_IN_PHASE;
|
|
} else if (b_flags & B_READ) {
|
|
cdb.cmd = CMD_READ;
|
|
iphase = DATA_IN_PHASE;
|
|
} else {
|
|
cdb.cmd = CMD_WRITE;
|
|
iphase = DATA_OUT_PHASE;
|
|
}
|
|
/*
|
|
* Perform command (with very long delays)
|
|
*/
|
|
scsi_delay(30000000);
|
|
stat = scsiicmd(hs, slave, (u_char *)&cdb, sizeof(cdb),
|
|
buf, len, iphase);
|
|
scsi_delay(0);
|
|
return (stat);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Copy a counted string, trimming the trailing space, and turn
|
|
* the result into a C-style string.
|
|
*/
|
|
void
|
|
scsi_str(src, dst, len)
|
|
char *src, *dst;
|
|
size_t len;
|
|
{
|
|
|
|
while (src[len - 1] == ' ') {
|
|
if (--len == 0) {
|
|
*dst = '\0';
|
|
return;
|
|
}
|
|
}
|
|
bcopy(src, dst, len);
|
|
dst[len] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Probe for a device at the given ctlr/target/lun, and fill in the inqbuf.
|
|
*/
|
|
int
|
|
scsi_probe_device(ctlr, targ, lun, inqbuf, inqlen)
|
|
int ctlr, targ, lun;
|
|
struct scsi_inquiry *inqbuf;
|
|
int inqlen;
|
|
{
|
|
static struct scsi_fmt_cdb inq = {
|
|
6, { CMD_INQUIRY, 0, 0, 0, 0, 0 }
|
|
};
|
|
int i, tries = 10, isrm = 0;
|
|
|
|
inq.cdb[4] = inqlen & 0xff;
|
|
|
|
scsi_delay(-1);
|
|
|
|
/*
|
|
* See if the unit exists.
|
|
*/
|
|
while ((i = scsi_test_unit_rdy(ctlr, targ, lun)) != 0) {
|
|
if (i == -1 || --tries < 0) {
|
|
if (isrm)
|
|
break;
|
|
/* doesn't exist or not a CCS device */
|
|
goto failed;
|
|
}
|
|
if (i == STS_CHECKCOND) {
|
|
u_char sensebuf[128];
|
|
struct scsi_xsense *sp =
|
|
(struct scsi_xsense *)sensebuf;
|
|
|
|
scsi_request_sense(ctlr, targ, lun, (u_char *)sensebuf,
|
|
sizeof(sensebuf));
|
|
if (sp->class == 7) {
|
|
switch (sp->key) {
|
|
/*
|
|
* Not ready -- might be removable media
|
|
* device with no media. Assume as much,
|
|
* if it really isn't, the inquiry command
|
|
* below will fail.
|
|
*/
|
|
case 2:
|
|
isrm = 1;
|
|
break;
|
|
/* drive doing an RTZ -- give it a while */
|
|
case 6:
|
|
delay(1000000);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
delay(1000);
|
|
}
|
|
|
|
/*
|
|
* Find out about the device.
|
|
*/
|
|
if (scsi_immed_command(ctlr, targ, lun, &inq, (u_char *)inqbuf,
|
|
inqlen, B_READ))
|
|
goto failed;
|
|
|
|
scsi_delay(0);
|
|
return (0);
|
|
|
|
failed:
|
|
scsi_delay(0);
|
|
return (-1);
|
|
}
|