5ec480ad23
Merged in changes required for NetBSD support (by mycroft@gnu.ai.mit.edu) and support for multiple NCR chips.
5910 lines
122 KiB
C
5910 lines
122 KiB
C
/**************************************************************************
|
||
**
|
||
** $Id: ncr.c,v 2.0.0.16 94/08/29 19:33:12 wolf Exp $
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**
|
||
** Device driver for the NCR 53C810 PCI-SCSI-Controller.
|
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**
|
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** 386bsd / FreeBSD / NetBSD
|
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**
|
||
**-------------------------------------------------------------------------
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**
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** Written for 386bsd and FreeBSD by
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** wolf@dentaro.gun.de Wolfgang Stanglmeier
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** se@mi.Uni-Koeln.de Stefan Esser
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**
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** Ported to NetBSD by
|
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** mycroft@gnu.ai.mit.edu
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**
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||
**-------------------------------------------------------------------------
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**
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** Copyright (c) 1994 Wolfgang Stanglmeier. All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
|
||
** 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
|
||
** 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. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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||
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**
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**-------------------------------------------------------------------------
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**
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** $Log: ncr.c,v $
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** Revision 2.0.0.16 94/08/29 19:33:12 wolf
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** Typo removed. :-(
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**
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** Revision 2.0.0.15 94/08/27 20:10:12 wolf
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** New: ncr_lookup().
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** Determine special flags by device name.
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** New user commands: WIDE and FLAG
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** New: tracing of commands on a per target base.
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**
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** Revision 2.0.0.14 94/08/25 22:48:52 wolf
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** New DEBUG_RESTART.
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** treatment field in struct tcb for silly devices.
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** repetition of busy-getcc removed.
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** --> CR_NOMSG set for target 6 <-- has to be removed.
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**
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** Revision 2.0.0.13 94/08/21 19:27:51 wolf
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** Special handling for Wangdat tape:
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** if getcc results with busy, try again without startup message.
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**
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** Revision 2.0.0.12 94/08/18 23:02:22 wolf
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** ATN cleared after send of multibyte message.
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** ncr_msgout moved into struct ncb field lastmsg.
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**
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** Revision 2.0.0.11 94/08/11 19:01:46 wolf
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** port to NetBSD.
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** script: start0-label introduced.
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** start sequence changed.
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** badgetcc: extended.
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** chip: stest2.ext bit used.
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** ncr_int_sir(): case 2 debugged: usage of target.
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**
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** Revision 2.0.0.10 94/08/08 22:28:55 wolf
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** debug messages use sc_print_addr.
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** ncr_int_sir() changed.
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**
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** Revision 2.0.0.9 94/08/08 19:45:09 wolf
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** struct script left outside struct ncb.
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** (must fit in one physical page)
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**
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** Revision 2.0.0.7 94/08/04 18:29:07 mycroft
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** Adaption to NetBSD.
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** ncr_unit changed to ncr_name.
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**
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** Revision 2.0.0.6 94/08/01 20:37:34 wolf
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** Tiny cleanup.
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**
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** Revision 2.0.0.5 94/08/01 18:50:40 wolf
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** Write MAX_TARGET and revision before scanning targets.
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** ncr_int_ma: extended comments.
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**
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** Revision 2.0.0.4 94/07/25 18:24:39 wolf
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** Overwrites bogus xp->opennings value of /sys/scsi/cd.c.
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** Annoying "constant overflow" done away.
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**
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** Revision 2.0.0.3 94/07/24 09:02:42 wolf
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** sstat0 used to calculate residue in int_ma.
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** log messages extended.
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**
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** Revision 2.0.0.2 94/07/22 19:04:26 wolf
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** ncr_int_ma: byte count corrected with dfifo.
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** script: dispatch and no_data changed.
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**
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** Revision 2.0.0.1 94/07/19 21:42:02 wolf
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** New debug value: DEBUG_FREEZE
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** M_REJECT log entry includes rejected message.
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** Phase change in command/status/msg phase logged.
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** Timeout exception handler locked.
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**
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** Revision 2.0 94/07/10 15:53:22 wolf
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** FreeBSD release.
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**
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** Revision 1.0 94/06/07 20:02:16 wolf
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** Beta release.
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**
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***************************************************************************
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*/
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#ifndef __NetBSD__
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#ifdef KERNEL
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#include <ncr.h>
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#else /* KERNEL */
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#define NNCR 1
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#endif /* KERNEL */
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#endif /* !__NetBSD__ */
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#define NCR_VERSION (2)
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/*==========================================================
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**
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** Configuration and Debugging
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**
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** May be overwritten in <i386/conf/XXXXX>
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**
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**==========================================================
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*/
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/*
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** Enable/Disable debug messages.
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** Can be changed at runtime too.
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*/
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#ifndef SCSI_NCR_DEBUG
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#define SCSI_NCR_DEBUG (0)
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#endif /* SCSI_NCR_DEBUG */
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/*
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** SCSI address of this device.
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** The boot routines should have set it.
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** If not, use this.
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*/
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#ifndef SCSI_NCR_MYADDR
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#define SCSI_NCR_MYADDR (7)
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#endif /* SCSI_NCR_MYADDR */
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/*
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** The maximal synchronous frequency in kHz.
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** (0=asynchronous)
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*/
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#ifndef SCSI_NCR_MAX_SYNC
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#define SCSI_NCR_MAX_SYNC (0)
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#endif /* SCSI_NCR_MAX_SYNC */
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/*
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** The maximum number of tags per logic unit.
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** Used only for disk devices that support tags.
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*/
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#ifndef SCSI_NCR_MAX_TAGS
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#define SCSI_NCR_MAX_TAGS (8)
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#endif /* SCSI_NCR_MAX_TAGS */
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/*==========================================================
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**
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** Configuration and Debugging
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**
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**==========================================================
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*/
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/*
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** Number of targets supported by the driver.
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** n permits target numbers 0..n-1.
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** Default is 7, meaning targets #0..#6.
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** #7 .. is myself.
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*/
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#define MAX_TARGET (7)
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/*
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** Number of logic units supported by the driver.
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** n enables logic unit numbers 0..n-1.
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** The common SCSI devices require only
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** one lun, so take 1 as the default.
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*/
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#define MAX_LUN (1)
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/*
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** The maximum number of jobs scheduled for starting.
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** There should be one slot per target, and one slot
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** for each tag of each target.
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*/
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#define MAX_START (20)
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/*
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** The maximum number of segments a transfer is split into.
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*/
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#define MAX_SCATTER (33)
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/*
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** The maximum transfer length (should be >= 64k).
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** MUST NOT be greater than (MAX_SCATTER-1) * NBPG.
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*/
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#define MAX_SIZE ((MAX_SCATTER-1) * NBPG)
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/*
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** Enable some processor/os dependent functions.
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*/
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#define DIRTY 1
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/*
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** Write disk status information to dkstat ?
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*/
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#define DK 1
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/*==========================================================
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**
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** Include files
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**
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**==========================================================
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#ifdef KERNEL
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <sys/kernel.h>
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#ifdef DK
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#include <sys/dkstat.h>
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#endif /* DK */
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#include <vm/vm.h>
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#endif /* KERNEL */
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#include <i386/pci/ncr_reg.h>
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#ifdef __NetBSD__
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#include <sys/device.h>
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#include <i386/pci/pcivar.h>
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#include <i386/pci/pcireg.h>
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#else
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#include <i386/pci/pci.h>
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#include <i386/pci/pci_device.h>
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#endif
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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/*==========================================================
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**
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** Debugging tags
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**
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**==========================================================
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*/
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#ifdef SCSI_NCR_DEBUG
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#define DEBUG_ALLOC (0x0001)
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#define DEBUG_PHASE (0x0002)
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#define DEBUG_POLL (0x0004)
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#define DEBUG_QUEUE (0x0008)
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#define DEBUG_RESULT (0x0010)
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#define DEBUG_SCATTER (0x0020)
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#define DEBUG_SCRIPT (0x0040)
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#define DEBUG_TINY (0x0080)
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#define DEBUG_TIMING (0x0100)
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#define DEBUG_SDTR (0x0200)
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#define DEBUG_TAGS (0x0400)
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#define DEBUG_FREEZE (0x0800)
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#define DEBUG_NODUMP (0x1000)
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#define DEBUG_RESTART (0x2000)
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int ncr_debug = SCSI_NCR_DEBUG;
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#else /* SCSI_NCR_DEBUG */
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int ncr_debug = 0;
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#endif /* SCSI_NCR_DEBUG */
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/*==========================================================
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**
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** assert ()
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**
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**==========================================================
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**
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** modified copy from 386bsd:/usr/include/sys/assert.h
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**
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**----------------------------------------------------------
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*/
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#define assert(expression) { \
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if (!(expression)) { \
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(void)printf(\
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"assertion \"%s\" failed: file \"%s\", line %d\n", \
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#expression, \
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__FILE__, __LINE__); \
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} \
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}
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/*==========================================================
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**
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** Access to the controller chip.
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**
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**==========================================================
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*/
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#define INB(r) (np->reg->r)
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#define INW(r) (np->reg->r)
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#define INL(r) (np->reg->r)
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#define OUTB(r, val) np->reg->r = val
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#define OUTW(r, val) np->reg->r = val
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#define OUTL(r, val) np->reg->r = val
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/*==========================================================
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**
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** Command control block states.
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**
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**==========================================================
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*/
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#define HS_IDLE (0)
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#define HS_BUSY (1)
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#define HS_NEGOTIATE (2) /* sync. data transfer */
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#define HS_DISCONNECT (3) /* Disconnected by target */
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#define HS_COMPLETE (4)
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#define HS_SEL_TIMEOUT (5) /* Selection timeout */
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#define HS_RESET (6) /* SCSI reset */
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#define HS_ABORTED (7) /* Transfer aborted */
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#define HS_TIMEOUT (8) /* Software timeout */
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#define HS_FAIL (9) /* SCSI or PCI bus errors */
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#define HS_UNEXPECTED (10) /* Unexpected disconnect */
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/*==========================================================
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**
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** Misc.
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**
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**==========================================================
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*/
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#define ILLEGAL_ADDR (0xefffffff)
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#define CCB_MAGIC (0xf2691ad2)
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/*==========================================================
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**
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** Capability bits in Inquire response byte #7.
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**
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**==========================================================
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*/
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#define INQ7_SYNC (0x10)
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#define INQ7_QUEUE (0x02)
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/*==========================================================
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**
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** OS dependencies.
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||
**
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**==========================================================
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*/
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#ifndef __FreeBSD__
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#ifndef __NetBSD__
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#define ANCIENT
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#endif /*__NetBSD__*/
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#endif /*__FreeBSD__*/
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#ifdef ANCIENT
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#define LUN lu
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#define TARGET targ
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#define PRINT_ADDR(xp) printf ("ncr0: targ %d lun %d ",xp->targ,xp->lu)
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#define INT32 int
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#define U_INT32 long
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#define TIMEOUT
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#else /* !ANCIENT */
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#define LUN sc_link->lun
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#define TARGET sc_link->target
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#define PRINT_ADDR(xp) sc_print_addr(xp->sc_link)
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#ifdef __NetBSD__
|
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#define INT32 int
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#define U_INT32 u_int
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#define TIMEOUT (void*)
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#else /*__NetBSD__*/
|
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#define INT32 int32
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#define U_INT32 u_int32
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#define TIMEOUT (timeout_func_t)
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#endif /*__NetBSD__*/
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#endif /* ANCIENT */
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||
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/*==========================================================
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**
|
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** Declaration of structs.
|
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**
|
||
**==========================================================
|
||
*/
|
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struct tcb;
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struct lcb;
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struct ccb;
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struct ncb;
|
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struct script;
|
||
|
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typedef struct ncb * ncb_p;
|
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typedef struct tcb * tcb_p;
|
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typedef struct lcb * lcb_p;
|
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typedef struct ccb * ccb_p;
|
||
|
||
struct link {
|
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u_long l_cmd;
|
||
u_long l_paddr;
|
||
};
|
||
|
||
struct usrcmd {
|
||
u_long target;
|
||
u_long lun;
|
||
u_long data;
|
||
u_long cmd;
|
||
};
|
||
|
||
#define UC_SETSYNC 10
|
||
#define UC_SETTAGS 11
|
||
#define UC_SETDEBUG 12
|
||
#define UC_SETORDER 13
|
||
#define UC_SETWIDE 14
|
||
#define UC_SETFLAG 15
|
||
|
||
/*==========================================================
|
||
**
|
||
** Access to fields of structs.
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
|
||
|
||
/*---------------------------------------
|
||
**
|
||
** Timestamps for profiling
|
||
**
|
||
**---------------------------------------
|
||
*/
|
||
|
||
struct tstamp {
|
||
struct timeval start;
|
||
struct timeval end;
|
||
struct timeval select;
|
||
struct timeval command;
|
||
struct timeval data;
|
||
struct timeval status;
|
||
struct timeval disconnect;
|
||
struct timeval reselect;
|
||
};
|
||
|
||
/*
|
||
** profiling data (per device)
|
||
*/
|
||
|
||
struct profile {
|
||
u_long num_trans;
|
||
u_long num_bytes;
|
||
u_long num_disc;
|
||
u_long num_break;
|
||
u_long num_int;
|
||
u_long num_fly;
|
||
u_long ms_setup;
|
||
u_long ms_data;
|
||
u_long ms_disc;
|
||
u_long ms_post;
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
** Declaration of structs: TARGET control block
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
struct tcb {
|
||
/*
|
||
** during reselection the ncr jumps to this point
|
||
** with SFBR set to the encoded TARGET number
|
||
** with bit 7 set.
|
||
** if it's not this target, jump to the next.
|
||
**
|
||
** JUMP IF (SFBR != #TARGET#)
|
||
** @(next tcb)
|
||
*/
|
||
|
||
struct link jump_tcb;
|
||
|
||
/*
|
||
** load the actual synchronous mode
|
||
** for this target to the sxfer register
|
||
**
|
||
** SCR_COPY (1);
|
||
** @(sval field of this tcb)
|
||
** @(sxfer register)
|
||
*/
|
||
|
||
ncrcmd getscr[3];
|
||
|
||
/*
|
||
** if next message is "identify"
|
||
** then load the message to SFBR,
|
||
** else load 0 to SFBR.
|
||
**
|
||
** CALL
|
||
** <RESEL_LUN>
|
||
*/
|
||
|
||
struct link call_lun;
|
||
|
||
/*
|
||
** now look for the right lun.
|
||
**
|
||
** JUMP
|
||
** @(first ccb of this lun)
|
||
*/
|
||
|
||
struct link jump_lcb;
|
||
|
||
/*
|
||
** pointer to interrupted getcc ccb
|
||
*/
|
||
|
||
ccb_p hold_cp;
|
||
|
||
/*
|
||
** statistical data
|
||
*/
|
||
|
||
u_long transfers;
|
||
u_long bytes;
|
||
|
||
/*
|
||
** user settable limits for sync transfer
|
||
** and tagged commands.
|
||
*/
|
||
|
||
u_char usrsync;
|
||
u_char usrtags;
|
||
u_char usrwide;
|
||
u_char usrflag;
|
||
|
||
#define UF_TRACE (0x01)
|
||
|
||
/*
|
||
** negotiation of synch transfer and tagged commands
|
||
** and tagging of criminal devices.
|
||
*/
|
||
|
||
u_char _1; /* prepared for wide transfers */
|
||
u_char _2;
|
||
u_short period;
|
||
u_char criminal; /* has to be longword alligned. */
|
||
u_char sval;
|
||
u_char minsync;
|
||
u_char maxoffs;
|
||
|
||
/*
|
||
** inquire data
|
||
*/
|
||
#define MAX_INQUIRE 36
|
||
u_char inqdata[MAX_INQUIRE];
|
||
|
||
/*
|
||
** the lcb's of this tcb
|
||
*/
|
||
|
||
lcb_p lp[MAX_LUN];
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
** Declaration of structs: LUN control block
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
struct lcb {
|
||
/*
|
||
** during reselection the ncr jumps to this point
|
||
** with SFBR set to the "Identify" message.
|
||
** if it's not this lun, jump to the next.
|
||
**
|
||
** JUMP IF (SFBR == #LUN#)
|
||
** @(next lcb of this target)
|
||
*/
|
||
|
||
struct link jump_lcb;
|
||
|
||
/*
|
||
** if next message is "simple tag",
|
||
** then load the tag to SFBR,
|
||
** else load 0 to SFBR.
|
||
**
|
||
** CALL
|
||
** <RESEL_TAG>
|
||
*/
|
||
|
||
struct link call_tag;
|
||
|
||
/*
|
||
** now look for the right ccb.
|
||
**
|
||
** JUMP
|
||
** @(first ccb of this lun)
|
||
*/
|
||
|
||
struct link jump_ccb;
|
||
|
||
/*
|
||
** start of the ccb chain
|
||
*/
|
||
|
||
ccb_p next_ccb;
|
||
|
||
/*
|
||
** Control of tagged queueing
|
||
*/
|
||
|
||
u_char reqccbs;
|
||
u_char actccbs;
|
||
u_char reqlink;
|
||
u_char actlink;
|
||
u_char usetags;
|
||
u_char lasttag;
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
** Declaration of structs: COMMAND control block
|
||
**
|
||
**==========================================================
|
||
**
|
||
** This substructure is copied from the ccb to a
|
||
** global address after selection (or reselection)
|
||
** and copied back before disconnect.
|
||
**
|
||
** These fields are accessible to the script processor.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
struct head {
|
||
/*
|
||
** Execution of a ccb starts at this point.
|
||
** It's a jump to the "SELECT" label
|
||
** of the script.
|
||
**
|
||
** After successful selection the script
|
||
** processor overwrites it with a jump to
|
||
** the IDLE label of the script.
|
||
*/
|
||
|
||
struct link launch;
|
||
|
||
/*
|
||
** Saved data pointer.
|
||
** Points to the position in the script
|
||
** responsible for the actual transfer
|
||
** of data.
|
||
** It's written after reception of a
|
||
** "SAVE_DATA_POINTER" message.
|
||
*/
|
||
|
||
u_long savep;
|
||
|
||
/*
|
||
** The virtual address of the ccb
|
||
** containing this header.
|
||
*/
|
||
|
||
ccb_p cp;
|
||
|
||
/*
|
||
** space for some timestamps to gather
|
||
** profiling data about devices and this driver.
|
||
*/
|
||
|
||
struct tstamp stamp;
|
||
|
||
/*
|
||
** status fields.
|
||
*/
|
||
|
||
u_char status[8];
|
||
|
||
#define host_status phys.header.status[0]
|
||
#define scsi_status phys.header.status[1]
|
||
#define scs2_status phys.header.status[2]
|
||
#define sync_status phys.header.status[3]
|
||
#define treatment phys.header.status[4]
|
||
#define parity_errs phys.header.status[5]
|
||
};
|
||
|
||
#define CR_NOMSG (0x01)
|
||
|
||
/*==========================================================
|
||
**
|
||
** Declaration of structs: Data structure block
|
||
**
|
||
**==========================================================
|
||
**
|
||
** During execution of a ccb by the script processor,
|
||
** the DSA (data structure address) register points
|
||
** to this substructure of the ccb.
|
||
** This substructure contains the header with
|
||
** the script-processor-changable data and
|
||
** data blocks for the indirect move commands.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
struct dsb {
|
||
|
||
/*
|
||
** Header.
|
||
** Has to be the first entry,
|
||
** because it's jumped to by the
|
||
** script processor
|
||
*/
|
||
|
||
struct head header;
|
||
|
||
/*
|
||
** Table data for Script
|
||
*/
|
||
|
||
struct scr_tblsel select;
|
||
struct scr_tblmove smsg ;
|
||
struct scr_tblmove smsg2 ;
|
||
struct scr_tblmove cmd ;
|
||
struct scr_tblmove sense ;
|
||
struct scr_tblmove data [MAX_SCATTER];
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
** Declaration of structs: Command control block.
|
||
**
|
||
**==========================================================
|
||
**
|
||
** During execution of a ccb by the script processor,
|
||
** the DSA (data structure address) register points
|
||
** to this substructure of the ccb.
|
||
** This substructure contains the header with
|
||
** the script-processor-changable data and then
|
||
** data blocks for the indirect move commands.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
|
||
struct ccb {
|
||
/*
|
||
** during reselection the ncr jumps to this point.
|
||
** If a "SIMPLE_TAG" message was received,
|
||
** then SFBR is set to the tag.
|
||
** else SFBR is set to 0
|
||
** If looking for another tag, jump to the next ccb.
|
||
**
|
||
** JUMP IF (SFBR != #TAG#)
|
||
** @(next ccb of this lun)
|
||
*/
|
||
|
||
struct link jump_ccb;
|
||
|
||
/*
|
||
** After execution of this call, the return address
|
||
** (in the TEMP register) points to the following
|
||
** data structure block.
|
||
** So copy it to the DSA register, and start
|
||
** processing of this data structure.
|
||
**
|
||
** CALL
|
||
** <RESEL_TMP>
|
||
*/
|
||
|
||
struct link call_tmp;
|
||
|
||
/*
|
||
** This is the data structure which is
|
||
** to be executed by the script processor.
|
||
*/
|
||
|
||
struct dsb phys;
|
||
|
||
/*
|
||
** If a data transfer phase is terminated too early
|
||
** (after reception of a message (i.e. DISCONNECT)),
|
||
** we have to prepare a mini script to transfer
|
||
** the rest of the data.
|
||
*/
|
||
|
||
u_long patch[8];
|
||
|
||
/*
|
||
** The general SCSI driver provides a
|
||
** pointer to a control block.
|
||
*/
|
||
|
||
struct scsi_xfer *xfer;
|
||
|
||
#ifdef ANCIENT
|
||
/*
|
||
** We copy the SCSI command, because it
|
||
** may be volatile (on the stack).
|
||
**
|
||
*/
|
||
struct scsi_generic cmd;
|
||
#endif /* ANCIENT */
|
||
|
||
/*
|
||
** We prepare a message to be sent after selection,
|
||
** and a second one to be sent after getcc selection.
|
||
** Contents are IDENTIFY and SIMPLE_TAG.
|
||
** And sdtr .. (if negotiating sync transfers)
|
||
*/
|
||
|
||
u_char scsi_smsg [8];
|
||
u_char scsi_smsg2[8];
|
||
|
||
/*
|
||
** Lock this ccb.
|
||
** Flag is used while looking for a free ccb.
|
||
*/
|
||
|
||
u_long magic;
|
||
u_long tlimit;
|
||
|
||
/*
|
||
** All ccbs of one hostadapter are linked.
|
||
*/
|
||
|
||
ccb_p link_ccb;
|
||
|
||
/*
|
||
** All ccbs of one target/lun are linked.
|
||
*/
|
||
|
||
ccb_p next_ccb;
|
||
|
||
/*
|
||
** Tag for this transfer.
|
||
** It's patched into jump_ccb.
|
||
** If it's not zero, a SIMPLE_TAG
|
||
** message is included in smsg.
|
||
*/
|
||
|
||
u_char tag;
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
** Declaration of structs: NCR device descriptor
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
struct ncb {
|
||
#ifdef __NetBSD__
|
||
struct device sc_dev;
|
||
struct intrhand sc_ih;
|
||
#endif
|
||
|
||
/*-----------------------------------------------
|
||
** Scripts ..
|
||
**-----------------------------------------------
|
||
**
|
||
** During reselection the ncr jumps to this point.
|
||
** The SFBR register is loaded with the encoded target id.
|
||
**
|
||
** Jump to the first target.
|
||
**
|
||
** JUMP
|
||
** @(next tcb)
|
||
*/
|
||
struct link jump_tcb;
|
||
|
||
/*-----------------------------------------------
|
||
** Configuration ..
|
||
**-----------------------------------------------
|
||
**
|
||
** virtual and physical addresses
|
||
** of the 53c810 chip.
|
||
*/
|
||
vm_offset_t vaddr;
|
||
vm_offset_t paddr;
|
||
|
||
/*
|
||
** pointer to the chip's registers.
|
||
*/
|
||
volatile
|
||
struct ncr_reg* reg;
|
||
|
||
/*
|
||
** A copy of the script, relocated for this ncb.
|
||
*/
|
||
struct script *script;
|
||
u_long p_script;
|
||
|
||
/*
|
||
** The SCSI address of the host adapter.
|
||
*/
|
||
u_char myaddr;
|
||
|
||
/*
|
||
** timing parameters
|
||
*/
|
||
u_char ns_async;
|
||
u_char ns_sync;
|
||
u_char rv_scntl3;
|
||
|
||
#ifndef ANCIENT
|
||
/*-----------------------------------------------
|
||
** Link to the generic SCSI driver
|
||
**-----------------------------------------------
|
||
*/
|
||
|
||
struct scsi_link sc_link;
|
||
#endif /* ANCIENT */
|
||
|
||
/*-----------------------------------------------
|
||
** Job control
|
||
**-----------------------------------------------
|
||
**
|
||
** Commands from user
|
||
*/
|
||
struct usrcmd user;
|
||
u_char order;
|
||
|
||
/*
|
||
** Target data
|
||
*/
|
||
struct tcb target[MAX_TARGET];
|
||
|
||
/*
|
||
** Start queue.
|
||
*/
|
||
u_long squeue [MAX_START];
|
||
u_short squeueput;
|
||
u_short actccbs;
|
||
|
||
/*
|
||
** Timeout handler
|
||
*/
|
||
u_long heartbeat;
|
||
u_short ticks;
|
||
u_short latetime;
|
||
u_long lasttime;
|
||
#ifndef __NetBSD__
|
||
u_short imask;
|
||
u_short mcount;
|
||
#endif
|
||
|
||
/*-----------------------------------------------
|
||
** Debug and profiling
|
||
**-----------------------------------------------
|
||
**
|
||
** register dump
|
||
*/
|
||
struct ncr_reg regdump;
|
||
struct timeval regtime;
|
||
|
||
/*
|
||
** Profiling data
|
||
*/
|
||
struct profile profile;
|
||
u_long disc_phys;
|
||
u_long disc_ref;
|
||
|
||
/*-----------------------------------------------
|
||
** Working areas
|
||
**-----------------------------------------------
|
||
**
|
||
** The global header.
|
||
** Accessible to both the host and the
|
||
** script-processor.
|
||
*/
|
||
|
||
struct head header;
|
||
|
||
/*
|
||
** The global control block.
|
||
** It's used only during the configuration phase.
|
||
** A target control block will be created
|
||
** after the first successful transfer.
|
||
*/
|
||
|
||
struct ccb ccb;
|
||
|
||
/*
|
||
** message buffers.
|
||
** Should be longword aligned,
|
||
** because they're written with a
|
||
** COPY script command.
|
||
*/
|
||
|
||
u_char msgout[8];
|
||
u_char msgin [8];
|
||
u_long lastmsg;
|
||
|
||
/*
|
||
** Buffer for STATUS_IN phase.
|
||
*/
|
||
|
||
u_char scratch;
|
||
u_char lock; /* @DEBUG@ */
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Script for NCR-Processor.
|
||
**
|
||
** Use ncr_script_fill() to create the variable parts.
|
||
** Use ncr_script_copy_and_bind() to make a copy and
|
||
** bind to physical addresses.
|
||
**
|
||
**
|
||
**==========================================================
|
||
**
|
||
** We have to know the offsets of all labels before
|
||
** we reach them (for forward jumps).
|
||
** Therefore we declare a struct here.
|
||
** If you make changes inside the script,
|
||
** DONT FORGET TO CHANGE THE LENGTHS HERE!
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
struct script {
|
||
ncrcmd start [ 7];
|
||
ncrcmd start0 [ 2];
|
||
ncrcmd start1 [ 3];
|
||
ncrcmd startpos [ 1];
|
||
ncrcmd tryloop [MAX_START*5+2];
|
||
ncrcmd trysel [ 8];
|
||
ncrcmd skip [ 8];
|
||
ncrcmd skip2 [ 3];
|
||
ncrcmd idle [ 2];
|
||
ncrcmd select [ 24];
|
||
ncrcmd prepare [ 4];
|
||
ncrcmd loadpos [ 24];
|
||
ncrcmd prepare2 [ 20];
|
||
ncrcmd setmsg [ 5];
|
||
ncrcmd clrack [ 6];
|
||
ncrcmd dispatch [ 22];
|
||
ncrcmd no_data [ 19];
|
||
ncrcmd checkatn [ 16];
|
||
ncrcmd command [ 15];
|
||
ncrcmd status [ 25];
|
||
ncrcmd msg_in [ 22];
|
||
ncrcmd msg_bad [ 6];
|
||
ncrcmd msg_parity [ 12];
|
||
ncrcmd msg_reject [ 6];
|
||
ncrcmd msg_extended [ 34];
|
||
ncrcmd msg_sdtr [ 41];
|
||
ncrcmd complete [ 6];
|
||
ncrcmd cleanup [ 12];
|
||
ncrcmd savepos [ 11];
|
||
ncrcmd signal [ 10];
|
||
ncrcmd save_dp [ 5];
|
||
ncrcmd restore_dp [ 5];
|
||
ncrcmd disconnect [ 21];
|
||
ncrcmd msg_out [ 9];
|
||
ncrcmd msg_out_done [ 7];
|
||
ncrcmd msg_out_abort [ 10];
|
||
ncrcmd getcc [ 4];
|
||
ncrcmd getcc1 [ 5];
|
||
ncrcmd getcc2 [ 36];
|
||
ncrcmd getcc3 [ 12];
|
||
ncrcmd badgetcc [ 6];
|
||
ncrcmd reselect [ 12];
|
||
ncrcmd reselect2 [ 6];
|
||
ncrcmd resel_tmp [ 5];
|
||
ncrcmd resel_lun [ 18];
|
||
ncrcmd resel_tag [ 24];
|
||
ncrcmd data_in [MAX_SCATTER * 4 + 7];
|
||
ncrcmd data_out [MAX_SCATTER * 4 + 7];
|
||
ncrcmd aborttag [ 4];
|
||
ncrcmd abort [ 20];
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Function Headers.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#ifdef KERNEL
|
||
#ifdef ANCIENT
|
||
extern int splbio(void);
|
||
extern void splx(int level);
|
||
extern int wakeup(void* channel);
|
||
extern int tsleep();
|
||
extern int DELAY();
|
||
extern int scsi_attachdevs();
|
||
extern void timeout();
|
||
extern void untimeout();
|
||
#endif /* ANCIENT */
|
||
|
||
static void ncr_alloc_ccb (ncb_p np, struct scsi_xfer * xp);
|
||
static void ncr_complete (ncb_p np, ccb_p cp);
|
||
static int ncr_delta (struct timeval * from, struct timeval * to);
|
||
static void ncr_exception (ncb_p np);
|
||
static void ncr_free_ccb (ncb_p np, ccb_p cp, int flags);
|
||
static void ncr_getclock (ncb_p np);
|
||
static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long t,u_long l);
|
||
static U_INT32 ncr_info (int unit);
|
||
static void ncr_init (ncb_p np, char * msg, u_long code);
|
||
static void ncr_int_ma (ncb_p np);
|
||
static void ncr_int_sir (ncb_p np);
|
||
static void ncr_int_sto (ncb_p np);
|
||
static u_long ncr_lookup (char* id);
|
||
static void ncr_min_phys (struct buf *bp);
|
||
static void ncr_opennings (ncb_p np, lcb_p lp, struct scsi_xfer * xp);
|
||
static void ncb_profile (ncb_p np, ccb_p cp);
|
||
static void ncr_script_copy_and_bind
|
||
(struct script * script, ncb_p np);
|
||
static void ncr_script_fill (struct script * scr);
|
||
static u_long ncr_scatter (struct dsb* phys,u_long vaddr,u_long datalen);
|
||
static void ncr_setmaxtags (tcb_p tp, u_long usrtags);
|
||
static void ncr_setsync (ncb_p np, ccb_p cp, u_char sxfer);
|
||
static void ncr_settags (tcb_p tp, lcb_p lp);
|
||
static INT32 ncr_start (struct scsi_xfer *xp);
|
||
static void ncr_timeout (ncb_p np);
|
||
static void ncr_usercmd (ncb_p np);
|
||
static void ncr_wakeup (ncb_p np, u_long code);
|
||
|
||
#ifdef __NetBSD__
|
||
static int ncb_probe (struct device *, struct device *, void *);
|
||
static void ncr_attach (struct device *, struct device *, void *);
|
||
static int ncr_intr (ncb_p np);
|
||
#else
|
||
static int ncb_probe (pcici_t config_id);
|
||
static int ncr_attach (pcici_t config_id);
|
||
static int ncr_intr (int dev);
|
||
#endif
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Access to processor ports.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#ifdef DIRTY
|
||
|
||
#ifdef __NetBSD__
|
||
#include <i386/include/cpufunc.h>
|
||
#include <i386/include/pio.h>
|
||
#include <i386/isa/isareg.h>
|
||
#define DELAY(x) delay(x)
|
||
#else /* !__NetBSD__ */
|
||
|
||
#include <i386/isa/isa.h>
|
||
#ifdef ANCIENT
|
||
/*
|
||
** Doch das ist alles nur geklaut ..
|
||
** aus: 386bsd:/sys/i386/include/pio.h
|
||
**
|
||
** Mach Operating System
|
||
** Copyright (c) 1990 Carnegie-Mellon University
|
||
** All rights reserved. The CMU software License Agreement specifies
|
||
** the terms and conditions for use and redistribution.
|
||
*/
|
||
|
||
#undef inb
|
||
#define inb(port) \
|
||
({ unsigned char data; \
|
||
__asm __volatile("inb %1, %0": "=a" (data): "d" ((u_short)(port))); \
|
||
data; })
|
||
|
||
#undef outb
|
||
#define outb(port, data) \
|
||
{__asm __volatile("outb %0, %1"::"a" ((u_char)(data)), "d" ((u_short)(port)));}
|
||
|
||
#define disable_intr() \
|
||
{__asm __volatile("cli");}
|
||
|
||
#define enable_intr() \
|
||
{__asm __volatile("sti");}
|
||
#endif /* ANCIENT */
|
||
|
||
/*------------------------------------------------------------------
|
||
**
|
||
** getirr: get a bit vector of the pending interrupts.
|
||
**
|
||
** NOTE: this is HIGHLY hardware dependant :-(
|
||
**
|
||
**------------------------------------------------------------------
|
||
*/
|
||
|
||
|
||
static u_long getirr (void)
|
||
{
|
||
u_long mask;
|
||
|
||
disable_intr();
|
||
|
||
outb (IO_ICU2, 0x0a);
|
||
mask = inb (IO_ICU2);
|
||
outb (IO_ICU2, 0x0b);
|
||
|
||
mask <<= 8;
|
||
|
||
outb (IO_ICU1, 0x0a);
|
||
mask|= inb (IO_ICU1);
|
||
outb (IO_ICU1, 0x0b);
|
||
|
||
enable_intr();
|
||
|
||
return (mask);
|
||
}
|
||
|
||
#endif /* __NetBSD__ */
|
||
#else /* DIRTY */
|
||
#define getirr() (0)
|
||
#endif /* DIRTY */
|
||
#endif /* KERNEL */
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Global static data.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
|
||
static char ident[] =
|
||
"\n$Id: ncr.c,v 2.0.0.16 94/08/29 19:33:12 wolf Exp $\n"
|
||
"Copyright (c) 1994, Wolfgang Stanglmeier\n";
|
||
|
||
u_long ncr_version = NCR_VERSION
|
||
+ (u_long) sizeof (struct ncb)
|
||
* (u_long) sizeof (struct ccb)
|
||
* (u_long) sizeof (struct lcb)
|
||
* (u_long) sizeof (struct tcb);
|
||
|
||
#ifdef KERNEL
|
||
|
||
#ifndef __NetBSD__
|
||
u_long ncr_units;
|
||
u_long nncr=NNCR;
|
||
ncb_p ncrp [NNCR];
|
||
#endif
|
||
|
||
/*
|
||
** SCSI cmd to get the SCSI sense data
|
||
*/
|
||
|
||
static u_char rs_cmd [6] =
|
||
{ 0x03, 0, 0, 0, sizeof (struct scsi_sense_data), 0 };
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Global static data: auto configure
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#ifdef __NetBSD__
|
||
|
||
struct cfdriver ncrcd = {
|
||
NULL, "ncr", ncb_probe, ncr_attach, DV_DISK, sizeof(struct ncb)
|
||
};
|
||
|
||
#else /* !__NetBSD__ */
|
||
|
||
struct pci_driver ncrdevice = {
|
||
ncb_probe,
|
||
ncr_attach,
|
||
0x00011000ul,
|
||
"ncr",
|
||
"ncr 53c810 scsi",
|
||
ncr_intr
|
||
};
|
||
|
||
#endif /* !__NetBSD__ */
|
||
|
||
|
||
#ifndef ANCIENT
|
||
struct scsi_adapter ncr_switch =
|
||
{
|
||
ncr_start,
|
||
ncr_min_phys,
|
||
0,
|
||
0,
|
||
ncr_info,
|
||
"ncr",
|
||
};
|
||
|
||
struct scsi_device ncr_dev =
|
||
{
|
||
NULL, /* Use default error handler */
|
||
NULL, /* have a queue, served by this */
|
||
NULL, /* have no async handler */
|
||
NULL, /* Use default 'done' routine */
|
||
"ncr",
|
||
};
|
||
#else /* ANCIENT */
|
||
struct scsi_switch ncr_switch =
|
||
{
|
||
ncr_start,
|
||
ncr_min_phys,
|
||
0,
|
||
0,
|
||
ncr_info,
|
||
0,0,0
|
||
};
|
||
#endif /* ANCIENT */
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Scripts for NCR-Processor.
|
||
**
|
||
** Use ncr_script_bind for binding to physical addresses.
|
||
**
|
||
**
|
||
**==========================================================
|
||
**
|
||
** NADDR generates a reference to a field of the controller data.
|
||
** PADDR generates a reference to another part of the script.
|
||
** RADDR generates a reference to a script processor register.
|
||
** FADDR generates a reference to a script processor register
|
||
** with offset.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
#define RELOC_SOFTC 0x40000000
|
||
#define RELOC_LABEL 0x50000000
|
||
#define RELOC_REGISTER 0x60000000
|
||
#define RELOC_MASK 0xf0000000
|
||
|
||
#define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
|
||
#define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
|
||
#define RADDR(label) (RELOC_REGISTER | REG(label))
|
||
#define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
|
||
|
||
static struct script script0 = {
|
||
/*--------------------------< START >-----------------------*/ {
|
||
/*
|
||
** Claim to be still alive ...
|
||
*/
|
||
SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)),
|
||
(ncrcmd) &time.tv_sec,
|
||
NADDR (heartbeat),
|
||
/*
|
||
** Make data structure address invalid.
|
||
** clear SIGP.
|
||
*/
|
||
SCR_LOAD_REG (dsa, 0xff),
|
||
0,
|
||
SCR_FROM_REG (ctest2),
|
||
0,
|
||
}/*-------------------------< START0 >----------------------*/,{
|
||
/*
|
||
** Hook for interrupted GetConditionCode.
|
||
** Will be patched to ... IFTRUE by
|
||
** the interrupt handler.
|
||
*/
|
||
SCR_INT ^ IFFALSE (0),
|
||
1,
|
||
}/*-------------------------< START1 >----------------------*/,{
|
||
/*
|
||
** Hook for stalled start queue.
|
||
** Will be patched to IFTRUE by the interrupt handler.
|
||
*/
|
||
SCR_INT ^ IFFALSE (0),
|
||
7,
|
||
/*
|
||
** Then jump to a certain point in tryloop.
|
||
** Due to the lack of indirect addressing the code
|
||
** is self modifying here.
|
||
*/
|
||
SCR_JUMP,
|
||
}/*-------------------------< STARTPOS >--------------------*/,{
|
||
PADDR(tryloop),
|
||
|
||
}/*-------------------------< TRYLOOP >---------------------*/,{
|
||
/*
|
||
** Load an entry of the start queue into dsa
|
||
** and try to start it by jumping to TRYSEL.
|
||
**
|
||
** Because the size depends on the
|
||
** #define MAX_START parameter, it is filled
|
||
** in at runtime.
|
||
**
|
||
**-----------------------------------------------------------
|
||
**
|
||
** ##===========< I=0; i<MAX_START >===========
|
||
** || SCR_COPY (4),
|
||
** || NADDR (squeue[i]),
|
||
** || RADDR (dsa),
|
||
** || SCR_CALL,
|
||
** || PADDR (trysel),
|
||
** ##==========================================
|
||
**
|
||
** SCR_JUMP,
|
||
** PADDR(tryloop),
|
||
**
|
||
**-----------------------------------------------------------
|
||
*/
|
||
0
|
||
|
||
}/*-------------------------< TRYSEL >----------------------*/,{
|
||
/*
|
||
** Now:
|
||
** DSA: Address of a Data Structure
|
||
** or Address of the IDLE-Label.
|
||
**
|
||
** TEMP: Address of a script, which tries to
|
||
** start the NEXT entry.
|
||
**
|
||
** Save the TEMP register into the SCRATCHA register.
|
||
** Then copy the DSA to TEMP and RETURN.
|
||
** This is kind of an indirect jump.
|
||
** (The script processor has NO stack, so the
|
||
** CALL is actually a jump and link, and the
|
||
** RETURN is an indirect jump.)
|
||
**
|
||
** If the slot was empty, DSA contains the address
|
||
** of the IDLE part of this script. The processor
|
||
** jumps to IDLE and waits for a reselect.
|
||
** It will wake up and try the same slot again
|
||
** after the SIGP bit becomes set by the host.
|
||
**
|
||
** If the slot was not empty, DSA contains
|
||
** the address of the phys-part of a ccb.
|
||
** The processor jumps to this address.
|
||
** phys starts with head,
|
||
** head starts with launch,
|
||
** so actually the processor jumps to
|
||
** the lauch part.
|
||
** If the entry is scheduled to be executed,
|
||
** then launch contains a jump to SELECT.
|
||
** If it's not scheduled, it contains a jump to IDLE.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (temp),
|
||
RADDR (scratcha),
|
||
SCR_COPY (4),
|
||
RADDR (dsa),
|
||
RADDR (temp),
|
||
SCR_RETURN,
|
||
0
|
||
|
||
}/*-------------------------< SKIP >------------------------*/,{
|
||
/*
|
||
** This entry has been canceled.
|
||
** Next time use the next slot.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (scratcha),
|
||
PADDR (startpos),
|
||
/*
|
||
** patch the launch field.
|
||
** should look like an idle process.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (dsa),
|
||
PADDR (skip2),
|
||
SCR_COPY (8),
|
||
PADDR (idle),
|
||
}/*-------------------------< SKIP2 >-----------------------*/,{
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR(start),
|
||
}/*-------------------------< IDLE >------------------------*/,{
|
||
/*
|
||
** Nothing to do?
|
||
** Wait for reselect.
|
||
*/
|
||
SCR_JUMP,
|
||
PADDR(reselect),
|
||
|
||
}/*-------------------------< SELECT >----------------------*/,{
|
||
/*
|
||
** DSA contains the address of a scheduled
|
||
** data structure.
|
||
**
|
||
** SCRATCHA contains the address of the script,
|
||
** which starts the next entry.
|
||
**
|
||
** Set Initiator mode.
|
||
**
|
||
** (Target mode is left as an exercise for the student)
|
||
*/
|
||
|
||
SCR_CLR (SCR_TRG),
|
||
0,
|
||
SCR_LOAD_REG (scr0, 0xff),
|
||
0,
|
||
|
||
/*
|
||
** And try to select this target.
|
||
*/
|
||
SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
|
||
PADDR (reselect),
|
||
|
||
/*
|
||
** Now there are 4 possibilities:
|
||
**
|
||
** (1) The ncr looses arbitration.
|
||
** This is ok, because it will try again,
|
||
** when the bus becomes idle.
|
||
** (But beware of the timeout function!)
|
||
**
|
||
** (2) The ncr is reselected.
|
||
** Then the script processor takes the jump
|
||
** to the RESELECT label.
|
||
**
|
||
** (3) The ncr completes the selection.
|
||
** Then it will execute the next statement.
|
||
**
|
||
** (4) There is a selection timeout.
|
||
** Then the ncr should interrupt the host and stop.
|
||
** Unfortunately, it seems to continue execution
|
||
** of the script. But it will fail with an
|
||
** IID-interrupt on the next WHEN.
|
||
*/
|
||
|
||
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)),
|
||
0,
|
||
|
||
/*
|
||
** Save target id to ctest0 register
|
||
*/
|
||
|
||
SCR_FROM_REG (sdid),
|
||
0,
|
||
SCR_TO_REG (ctest0),
|
||
0,
|
||
/*
|
||
** Send the IDENTIFY and SIMPLE_TAG messages
|
||
** (and the M_X_SDTR message)
|
||
*/
|
||
SCR_MOVE_TBL ^ SCR_MSG_OUT,
|
||
offsetof (struct dsb, smsg),
|
||
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
|
||
-16,
|
||
SCR_CLR (SCR_ATN),
|
||
0,
|
||
SCR_COPY (1),
|
||
RADDR (sfbr),
|
||
NADDR (lastmsg),
|
||
/*
|
||
** Selection complete.
|
||
** Next time use the next slot.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (scratcha),
|
||
PADDR (startpos),
|
||
}/*-------------------------< PREPARE >----------------------*/,{
|
||
/*
|
||
** The ncr doesn't have an indirect load
|
||
** or store command. So we have to
|
||
** copy part of the control block to a
|
||
** fixed place, where we can access it.
|
||
**
|
||
** We patch the address part of a
|
||
** COPY command with the DSA-register.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (dsa),
|
||
PADDR (loadpos),
|
||
/*
|
||
** then we do the actual copy.
|
||
*/
|
||
SCR_COPY (sizeof (struct head)),
|
||
/*
|
||
** continued after the next label ...
|
||
*/
|
||
|
||
}/*-------------------------< LOADPOS >---------------------*/,{
|
||
0,
|
||
NADDR (header),
|
||
/*
|
||
** Mark this ccb as not scheduled.
|
||
*/
|
||
SCR_COPY (8),
|
||
PADDR (idle),
|
||
NADDR (header.launch),
|
||
/*
|
||
** Set a time stamp for this selection
|
||
*/
|
||
SCR_COPY (sizeof (struct timeval)),
|
||
(ncrcmd) &time,
|
||
NADDR (header.stamp.select),
|
||
/*
|
||
** load the savep (saved pointer) into
|
||
** the TEMP register (actual pointer)
|
||
*/
|
||
SCR_COPY (4),
|
||
NADDR (header.savep),
|
||
RADDR (temp),
|
||
/*
|
||
** Initialize the status registers
|
||
*/
|
||
SCR_COPY (4),
|
||
NADDR (header.status),
|
||
RADDR (scr0),
|
||
/*
|
||
** Set carry according to host_status
|
||
*/
|
||
SCR_CLR (SCR_CARRY),
|
||
0,
|
||
SCR_FROM_REG (scr0),
|
||
0,
|
||
SCR_JUMPR ^ IFFALSE (DATA (HS_NEGOTIATE)),
|
||
16,
|
||
SCR_LOAD_REG (scr0, HS_BUSY),
|
||
0,
|
||
SCR_SET (SCR_CARRY),
|
||
0,
|
||
|
||
}/*-------------------------< PREPARE2 >---------------------*/,{
|
||
/*
|
||
** <Carry set iff SDTM message sent>
|
||
**
|
||
** Load the synchronous mode register
|
||
*/
|
||
SCR_FROM_REG (scr3),
|
||
0,
|
||
SCR_TO_REG (sxfer),
|
||
0,
|
||
/*
|
||
** Initialize the msgout buffer with a NOOP message.
|
||
*/
|
||
SCR_LOAD_REG (scratcha, M_NOOP),
|
||
0,
|
||
SCR_COPY (1),
|
||
RADDR (scratcha),
|
||
NADDR (msgout),
|
||
SCR_COPY (1),
|
||
RADDR (scratcha),
|
||
NADDR (msgin),
|
||
/*
|
||
** If M_X_SDTR sent, but no MSG_IN phase, ...
|
||
*/
|
||
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
|
||
PADDR (msg_in),
|
||
SCR_JUMP ^ IFFALSE (CARRYSET),
|
||
PADDR (dispatch),
|
||
/*
|
||
** no answer is an answer, too.
|
||
*/
|
||
SCR_INT,
|
||
3,
|
||
SCR_JUMP,
|
||
PADDR (dispatch),
|
||
|
||
}/*-------------------------< SETMSG >----------------------*/,{
|
||
SCR_COPY (1),
|
||
RADDR (scratcha),
|
||
NADDR (msgout),
|
||
SCR_SET (SCR_ATN),
|
||
0,
|
||
}/*-------------------------< CLRACK >----------------------*/,{
|
||
/*
|
||
** Terminate sdtr mode.
|
||
** Terminate possible pending message phase.
|
||
*/
|
||
SCR_FROM_REG (scr0),
|
||
0,
|
||
SCR_LOAD_REG (scr0, HS_BUSY),
|
||
0,
|
||
SCR_CLR (SCR_ACK | SCR_CARRY),
|
||
0,
|
||
|
||
}/*-----------------------< DISPATCH >----------------------*/,{
|
||
SCR_RETURN ^ IFTRUE (WHEN (SCR_DATA_OUT)),
|
||
0,
|
||
SCR_RETURN ^ IFTRUE (IF (SCR_DATA_IN)),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
|
||
PADDR (msg_out),
|
||
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN)),
|
||
PADDR (msg_in),
|
||
SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
|
||
PADDR (command),
|
||
SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
|
||
PADDR (status),
|
||
/*
|
||
** Discard one illegal phase byte, if required.
|
||
*/
|
||
SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
|
||
8,
|
||
SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
|
||
NADDR (scratch),
|
||
SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
|
||
8,
|
||
SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
|
||
NADDR (scratch),
|
||
SCR_JUMP,
|
||
PADDR (dispatch),
|
||
}/*-------------------------< NO_DATA >--------------------*/,{
|
||
/*
|
||
** The target wants to tranfer too much data
|
||
** or in the wrong direction.
|
||
** Prepare an abort message and set ATN.
|
||
*/
|
||
SCR_LOAD_REG (scratcha, M_ABORT),
|
||
0,
|
||
SCR_COPY (1),
|
||
RADDR (scratcha),
|
||
NADDR (msgout),
|
||
SCR_SET (SCR_ATN),
|
||
0,
|
||
/*
|
||
** Discard one data byte, if required.
|
||
*/
|
||
SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
|
||
8,
|
||
SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
|
||
NADDR (scratch),
|
||
SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
|
||
8,
|
||
SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
|
||
NADDR (scratch),
|
||
/*
|
||
** .. and repeat as required.
|
||
*/
|
||
SCR_CALL,
|
||
PADDR (dispatch),
|
||
SCR_JUMP,
|
||
PADDR (no_data),
|
||
|
||
}/*-------------------------< CHECKATN >--------------------*/,{
|
||
/*
|
||
** If AAP (bit 1 of scntl0 register) is set
|
||
** and a parity error is detected,
|
||
** the script processor asserts ATN.
|
||
**
|
||
** The target should switch to a MSG_OUT phase
|
||
** to get the message.
|
||
*/
|
||
SCR_FROM_REG (socl),
|
||
0,
|
||
SCR_JUMP ^ IFFALSE (MASK (CATN, CATN)),
|
||
PADDR (dispatch),
|
||
/*
|
||
** count it
|
||
*/
|
||
SCR_COPY (1),
|
||
NADDR (header.status[5]),
|
||
FADDR (scratcha, 1),
|
||
SCR_REG_REG (scratcha, SCR_ADD, 0x01) | SCR_REG_OFS(1),
|
||
0,
|
||
SCR_COPY (1),
|
||
FADDR (scratcha, 1),
|
||
NADDR (header.status[5]),
|
||
/*
|
||
** Prepare a M_ID_ERROR message
|
||
** (initiator detected error).
|
||
** The target should retry the transfer.
|
||
*/
|
||
SCR_LOAD_REG (scratcha, M_ID_ERROR),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (setmsg),
|
||
|
||
}/*-------------------------< COMMAND >--------------------*/,{
|
||
/*
|
||
** If this is not a GETCC transfer ...
|
||
*/
|
||
SCR_FROM_REG (scr1),
|
||
0,
|
||
/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (S_CHECK_COND)),
|
||
28,
|
||
/*
|
||
** ... set a timestamp ...
|
||
*/
|
||
SCR_COPY (sizeof (struct timeval)),
|
||
(ncrcmd) &time,
|
||
NADDR (header.stamp.command),
|
||
/*
|
||
** ... and send the command
|
||
*/
|
||
SCR_MOVE_TBL ^ SCR_COMMAND,
|
||
offsetof (struct dsb, cmd),
|
||
SCR_JUMP,
|
||
PADDR (dispatch),
|
||
/*
|
||
** Send the GETCC command
|
||
*/
|
||
/*>>>*/ SCR_MOVE_ABS (6) ^ SCR_COMMAND,
|
||
(ncrcmd) &rs_cmd,
|
||
SCR_JUMP,
|
||
PADDR (dispatch),
|
||
|
||
}/*-------------------------< STATUS >--------------------*/,{
|
||
/*
|
||
** set the timestamp.
|
||
*/
|
||
SCR_COPY (sizeof (struct timeval)),
|
||
(ncrcmd) &time,
|
||
NADDR (header.stamp.status),
|
||
/*
|
||
** If this is a GETCC transfer,
|
||
*/
|
||
SCR_FROM_REG (scr1),
|
||
0,
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (S_CHECK_COND)),
|
||
32,
|
||
/*
|
||
** get the status
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_STATUS,
|
||
NADDR (scratch),
|
||
/*
|
||
** Save status to scs2_status.
|
||
** Mark as complete.
|
||
** And wait for disconnect.
|
||
*/
|
||
SCR_TO_REG (scr2),
|
||
0,
|
||
SCR_LOAD_REG (scr0, HS_COMPLETE),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (checkatn),
|
||
/*
|
||
** If it was no GETCC transfer,
|
||
** save the status to scsi_status.
|
||
*/
|
||
/*>>>*/ SCR_MOVE_ABS (1) ^ SCR_STATUS,
|
||
NADDR (scratch),
|
||
SCR_TO_REG (scr1),
|
||
0,
|
||
/*
|
||
** if it was no check condition ...
|
||
*/
|
||
SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
|
||
PADDR (checkatn),
|
||
/*
|
||
** ... mark as complete.
|
||
*/
|
||
SCR_LOAD_REG (scr0, HS_COMPLETE),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (checkatn),
|
||
|
||
}/*-------------------------< MSG_IN >--------------------*/,{
|
||
/*
|
||
** Get the first byte of the message
|
||
** and save it to SCRATCHA.
|
||
**
|
||
** The script processor doesn't negate the
|
||
** ACK signal after this transfer.
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
||
NADDR (msgin[0]),
|
||
/*
|
||
** Check for message parity error.
|
||
*/
|
||
SCR_TO_REG (scratcha),
|
||
0,
|
||
SCR_FROM_REG (socl),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
|
||
PADDR (msg_parity),
|
||
SCR_FROM_REG (scratcha),
|
||
0,
|
||
/*
|
||
** Parity was ok, handle this message.
|
||
*/
|
||
SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
|
||
PADDR (complete),
|
||
SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)),
|
||
PADDR (save_dp),
|
||
SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)),
|
||
PADDR (restore_dp),
|
||
SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
|
||
PADDR (disconnect),
|
||
SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
|
||
PADDR (msg_extended),
|
||
SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
|
||
PADDR (msg_reject),
|
||
/*
|
||
** Rest of the messages left as
|
||
** an exercise ...
|
||
**
|
||
** Unimplemented messages:
|
||
** fall through to MSG_BAD.
|
||
*/
|
||
}/*-------------------------< MSG_BAD >------------------*/,{
|
||
/*
|
||
** unimplemented message - reject it.
|
||
*/
|
||
SCR_INT,
|
||
6,
|
||
SCR_LOAD_REG (scratcha, M_REJECT),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (setmsg),
|
||
|
||
}/*-------------------------< MSG_PARITY >---------------*/,{
|
||
/*
|
||
** count it
|
||
*/
|
||
SCR_COPY (1),
|
||
NADDR (header.status[4]),
|
||
RADDR (scratcha),
|
||
SCR_REG_REG (scratcha, SCR_ADD, 0x01),
|
||
0,
|
||
SCR_COPY (1),
|
||
RADDR (scratcha),
|
||
NADDR (header.status[4]),
|
||
/*
|
||
** send a "message parity error" message.
|
||
*/
|
||
SCR_LOAD_REG (scratcha, M_PARITY),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (setmsg),
|
||
}/*-------------------------< MSG_REJECT >---------------*/,{
|
||
/*
|
||
** If a M_X_SDTR message was sent,
|
||
** negotiate synchronous mode.
|
||
*/
|
||
SCR_INT ^ IFTRUE (CARRYSET),
|
||
3,
|
||
/*
|
||
** make host log this message
|
||
*/
|
||
SCR_INT ^ IFFALSE (CARRYSET),
|
||
5,
|
||
SCR_JUMP,
|
||
PADDR (clrack),
|
||
|
||
}/*-------------------------< MSG_EXTENDED >-------------*/,{
|
||
/*
|
||
** Terminate cycle
|
||
*/
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
||
PADDR (dispatch),
|
||
/*
|
||
** get length.
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
||
NADDR (msgin[1]),
|
||
/*
|
||
** Check for message parity error.
|
||
*/
|
||
SCR_TO_REG (scratcha),
|
||
0,
|
||
SCR_FROM_REG (socl),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
|
||
PADDR (msg_parity),
|
||
SCR_FROM_REG (scratcha),
|
||
0,
|
||
/*
|
||
*/
|
||
SCR_JUMP ^ IFFALSE (DATA (3)),
|
||
PADDR (msg_bad),
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
||
PADDR (dispatch),
|
||
/*
|
||
** get extended message code.
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
||
NADDR (msgin[2]),
|
||
/*
|
||
** Check for message parity error.
|
||
*/
|
||
SCR_TO_REG (scratcha),
|
||
0,
|
||
SCR_FROM_REG (socl),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
|
||
PADDR (msg_parity),
|
||
SCR_FROM_REG (scratcha),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (DATA (M_X_SDTR)),
|
||
PADDR (msg_sdtr),
|
||
/*
|
||
** unknown extended message
|
||
*/
|
||
SCR_JUMP,
|
||
PADDR (msg_bad)
|
||
|
||
}/*-------------------------< MSG_SDTR >-----------------*/,{
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
||
PADDR (dispatch),
|
||
/*
|
||
** get period and offset
|
||
*/
|
||
SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
|
||
NADDR (msgin[3]),
|
||
SCR_FROM_REG (socl),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
|
||
PADDR (msg_parity),
|
||
/*
|
||
** let the host do the real work.
|
||
*/
|
||
SCR_INT ^ IFTRUE (CARRYSET),
|
||
3,
|
||
SCR_INT ^ IFFALSE (CARRYSET),
|
||
4,
|
||
/*
|
||
** let the target fetch our answer.
|
||
*/
|
||
SCR_SET (SCR_ATN),
|
||
0,
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
|
||
/*<<<*/ SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
|
||
16,
|
||
SCR_INT,
|
||
4,
|
||
SCR_JUMP,
|
||
PADDR (dispatch),
|
||
/*
|
||
** Sent the M_X_SDTR
|
||
*/
|
||
/*>>>*/ SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
|
||
NADDR (msgout),
|
||
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
|
||
-16,
|
||
SCR_CLR (SCR_ATN),
|
||
0,
|
||
SCR_COPY (1),
|
||
RADDR (sfbr),
|
||
NADDR (lastmsg),
|
||
/*
|
||
** If rejected, cancel sync transfer.
|
||
*/
|
||
SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)),
|
||
PADDR (msg_out_done),
|
||
SCR_FROM_REG (sbdl),
|
||
0,
|
||
SCR_INT ^ IFTRUE (DATA (M_REJECT)),
|
||
4,
|
||
SCR_JUMP,
|
||
PADDR (msg_out_done),
|
||
|
||
}/*-------------------------< COMPLETE >-----------------*/,{
|
||
/*
|
||
** Complete message.
|
||
**
|
||
** When we terminate the cycle by clearing ACK,
|
||
** the target may disconnect immediately.
|
||
**
|
||
** We don't want to be told of an
|
||
** "unexpected disconnect",
|
||
** so we disable this feature.
|
||
*/
|
||
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
|
||
0,
|
||
/*
|
||
** Terminate cycle ...
|
||
*/
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
/*
|
||
** ... and wait for the disconnect.
|
||
*/
|
||
SCR_WAIT_DISC,
|
||
0,
|
||
}/*-------------------------< CLEANUP >-------------------*/,{
|
||
/*
|
||
** dsa: Pointer to ccb
|
||
** or xxxxxxFF (no ccb)
|
||
**
|
||
** scr0: Host-Status (<>0!)
|
||
*/
|
||
SCR_FROM_REG (dsa),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (DATA (0xff)),
|
||
PADDR (signal),
|
||
/*
|
||
** dsa is valid.
|
||
** save the status registers
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (scr0),
|
||
NADDR (header.status),
|
||
/*
|
||
** and copy back the header to the ccb.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (dsa),
|
||
PADDR (savepos),
|
||
SCR_COPY (sizeof (struct head)),
|
||
NADDR (header),
|
||
}/*-------------------------< SAVEPOS >---------------------*/,{
|
||
0,
|
||
|
||
/*
|
||
** If command resulted in "check condition"
|
||
** status and is not yet completed,
|
||
** try to get the condition code.
|
||
*/
|
||
SCR_FROM_REG (scr0),
|
||
0,
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (0x00, 0xfc)),
|
||
16,
|
||
SCR_FROM_REG (scr1),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
|
||
PADDR(getcc2),
|
||
/*
|
||
** And make the DSA register invalid.
|
||
*/
|
||
/*>>>*/ SCR_LOAD_REG (dsa, 0xff), /* invalid */
|
||
0,
|
||
}/*-------------------------< SIGNAL >----------------------*/,{
|
||
/*
|
||
** if status = queue full,
|
||
** reinsert in startqueue and stall queue.
|
||
*/
|
||
SCR_FROM_REG (scr1),
|
||
0,
|
||
SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
|
||
8,
|
||
/*
|
||
** if job completed ...
|
||
*/
|
||
SCR_FROM_REG (scr0),
|
||
0,
|
||
/*
|
||
** ... signal completion to the host
|
||
*/
|
||
SCR_INT_FLY ^ IFFALSE (MASK (0x00, 0xfc)),
|
||
0,
|
||
/*
|
||
** Auf zu neuen Schandtaten!
|
||
*/
|
||
SCR_JUMP,
|
||
PADDR(start),
|
||
|
||
}/*-------------------------< SAVE_DP >------------------*/,{
|
||
/*
|
||
** SAVE_DP message:
|
||
** Copy TEMP register to SAVEP in header.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (temp),
|
||
NADDR (header.savep),
|
||
SCR_JUMP,
|
||
PADDR (clrack),
|
||
}/*-------------------------< RESTORE_DP >---------------*/,{
|
||
/*
|
||
** RESTORE_DP message:
|
||
** Copy SAVEP in header to TEMP register.
|
||
*/
|
||
SCR_COPY (4),
|
||
NADDR (header.savep),
|
||
RADDR (temp),
|
||
SCR_JUMP,
|
||
PADDR (clrack),
|
||
}/*-------------------------< DISCONNECT >---------------*/,{
|
||
/*
|
||
** Disable the "unexpected disconnect" feature.
|
||
*/
|
||
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
|
||
0,
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
/*
|
||
** Wait for the disconnect.
|
||
*/
|
||
SCR_WAIT_DISC,
|
||
0,
|
||
/*
|
||
** Profiling:
|
||
** Set a time stamp,
|
||
** and count the disconnects.
|
||
*/
|
||
SCR_COPY (sizeof (struct timeval)),
|
||
(ncrcmd) &time,
|
||
NADDR (header.stamp.disconnect),
|
||
SCR_COPY (4),
|
||
NADDR (disc_phys),
|
||
RADDR (temp),
|
||
SCR_REG_REG (temp, SCR_ADD, 0x01),
|
||
0,
|
||
SCR_COPY (4),
|
||
RADDR (temp),
|
||
NADDR (disc_phys),
|
||
/*
|
||
** Status is: DISCONNECTED.
|
||
*/
|
||
SCR_LOAD_REG (scr0, HS_DISCONNECT),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (cleanup),
|
||
|
||
}/*-------------------------< MSG_OUT >-------------------*/,{
|
||
/*
|
||
** The target requests a message.
|
||
** First remove ATN so the target will
|
||
** not continue fetching messages.
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
|
||
NADDR (msgout),
|
||
SCR_COPY (1),
|
||
RADDR (sfbr),
|
||
NADDR (lastmsg),
|
||
/*
|
||
** If it was no ABORT message ...
|
||
*/
|
||
SCR_JUMP ^ IFTRUE (DATA (M_ABORT)),
|
||
PADDR (msg_out_abort),
|
||
/*
|
||
** ... wait for the next phase
|
||
** if it's a message out, send it again, ...
|
||
*/
|
||
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
|
||
PADDR (msg_out),
|
||
}/*-------------------------< MSG_OUT_DONE >--------------*/,{
|
||
/*
|
||
** ... else clear the message ...
|
||
*/
|
||
SCR_LOAD_REG (scratcha, M_NOOP),
|
||
0,
|
||
SCR_COPY (4),
|
||
RADDR (scratcha),
|
||
NADDR (msgout),
|
||
/*
|
||
** ... and process the next phase
|
||
*/
|
||
SCR_JUMP,
|
||
PADDR (dispatch),
|
||
}/*-------------------------< MSG_OUT_ABORT >-------------*/,{
|
||
/*
|
||
** After ABORT message,
|
||
**
|
||
** expect an immediate disconnect, ...
|
||
*/
|
||
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
|
||
0,
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
SCR_WAIT_DISC,
|
||
0,
|
||
/*
|
||
** ... and set the status to "ABORTED"
|
||
*/
|
||
SCR_LOAD_REG (scr0, HS_ABORTED),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (cleanup),
|
||
|
||
}/*-------------------------< GETCC >-----------------------*/,{
|
||
/*
|
||
** The ncr doesn't have an indirect load
|
||
** or store command. So we have to
|
||
** copy part of the control block to a
|
||
** fixed place, where we can modify it.
|
||
**
|
||
** We patch the address part of a COPY command
|
||
** with the address of the dsa register ...
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (dsa),
|
||
PADDR (getcc1),
|
||
/*
|
||
** ... then we do the actual copy.
|
||
*/
|
||
SCR_COPY (sizeof (struct head)),
|
||
}/*-------------------------< GETCC1 >----------------------*/,{
|
||
0,
|
||
NADDR (header),
|
||
/*
|
||
** Initialize the status registers
|
||
*/
|
||
SCR_COPY (4),
|
||
NADDR (header.status),
|
||
RADDR (scr0),
|
||
}/*-------------------------< GETCC2 >----------------------*/,{
|
||
/*
|
||
** Get the condition code from a target.
|
||
**
|
||
** DSA points to a data structure.
|
||
** Set TEMP to the script location
|
||
** that receives the condition code.
|
||
**
|
||
** Because there is no script command
|
||
** to load a longword into a register,
|
||
** we use a CALL command.
|
||
*/
|
||
/*<<<*/ SCR_CALLR,
|
||
24,
|
||
/*
|
||
** Get the condition code.
|
||
*/
|
||
SCR_MOVE_TBL ^ SCR_DATA_IN,
|
||
offsetof (struct dsb, sense),
|
||
/*
|
||
** No data phase may follow!
|
||
*/
|
||
SCR_CALL,
|
||
PADDR (checkatn),
|
||
SCR_JUMP,
|
||
PADDR (no_data),
|
||
/*>>>*/
|
||
/*
|
||
** The CALL jumps to this point.
|
||
** Prepare for a RESTORE_POINTER message.
|
||
** Save the TEMP register into the saved pointer.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (temp),
|
||
NADDR (header.savep),
|
||
/*
|
||
** Load scratcha, because in case of a selection timeout,
|
||
** the host will expect a new value for startpos in
|
||
** the scratcha register.
|
||
*/
|
||
SCR_COPY (4),
|
||
PADDR (startpos),
|
||
RADDR (scratcha),
|
||
/*
|
||
** If CR_NOMSG is set, select without ATN.
|
||
** and don't send a message.
|
||
*/
|
||
SCR_COPY (1),
|
||
NADDR (header.status[4]),
|
||
RADDR (sfbr),
|
||
SCR_JUMP ^ IFTRUE (MASK (CR_NOMSG, CR_NOMSG)),
|
||
PADDR(getcc3),
|
||
|
||
/*
|
||
** Then try to connect to the target.
|
||
** If we are reselected, special treatment
|
||
** of the current job is required before
|
||
** accepting the reselection.
|
||
*/
|
||
SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
|
||
PADDR(badgetcc),
|
||
/*
|
||
** save target id.
|
||
*/
|
||
SCR_FROM_REG (sdid),
|
||
0,
|
||
SCR_TO_REG (ctest0),
|
||
0,
|
||
/*
|
||
** Send the IDENTIFY and a SDTM message.
|
||
** In case of short transfer, remove ATN.
|
||
*/
|
||
SCR_MOVE_TBL ^ SCR_MSG_OUT,
|
||
offsetof (struct dsb, smsg2),
|
||
SCR_CLR (SCR_ATN),
|
||
0,
|
||
/*
|
||
** save the first byte of the message.
|
||
*/
|
||
SCR_COPY (1),
|
||
RADDR (sfbr),
|
||
NADDR (lastmsg),
|
||
/*
|
||
** Handle synch negotiation.
|
||
*/
|
||
SCR_SET (SCR_CARRY),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (prepare2),
|
||
|
||
}/*-------------------------< GETCC3 >----------------------*/,{
|
||
/*
|
||
** Try to connect to the target.
|
||
** If we are reselected, special treatment
|
||
** of the current job is required before
|
||
** accepting the reselection.
|
||
**
|
||
** Silly target won't accept a message.
|
||
** Select without ATN.
|
||
*/
|
||
SCR_SEL_TBL ^ offsetof (struct dsb, select),
|
||
PADDR(badgetcc),
|
||
/*
|
||
** save target id.
|
||
*/
|
||
SCR_FROM_REG (sdid),
|
||
0,
|
||
SCR_TO_REG (ctest0),
|
||
0,
|
||
/*
|
||
** Force error if selection timeout
|
||
*/
|
||
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)),
|
||
0,
|
||
/*
|
||
** don't negotiate.
|
||
*/
|
||
SCR_CLR (SCR_CARRY),
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (prepare2),
|
||
|
||
}/*------------------------< BADGETCC >---------------------*/,{
|
||
/*
|
||
** If SIGP was set, clear it and try again.
|
||
*/
|
||
SCR_FROM_REG (ctest2),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
|
||
PADDR (getcc2),
|
||
SCR_INT,
|
||
2,
|
||
}/*-------------------------< RESELECT >--------------------*/,{
|
||
/*
|
||
** make the DSA invalid.
|
||
*/
|
||
SCR_LOAD_REG (dsa, 0xff),
|
||
0,
|
||
SCR_CLR (SCR_TRG),
|
||
0,
|
||
/*
|
||
** Sleep waiting for a reselection.
|
||
** If SIGP is set, special treatment.
|
||
**
|
||
** Zu allem bereit ..
|
||
*/
|
||
SCR_WAIT_RESEL,
|
||
PADDR(reselect2),
|
||
/*
|
||
** ... zu nichts zu gebrauchen ?
|
||
**
|
||
** load the target id into the SFBR
|
||
** and jump to the control block.
|
||
**
|
||
** Look at the declarations of
|
||
** - struct ncb
|
||
** - struct tcb
|
||
** - struct lcb
|
||
** - struct ccb
|
||
** to understand what's going on.
|
||
*/
|
||
SCR_REG_SFBR (ssid, SCR_AND, 0x87),
|
||
0,
|
||
SCR_TO_REG (ctest0),
|
||
0,
|
||
SCR_JUMP,
|
||
NADDR (jump_tcb),
|
||
}/*-------------------------< RESELECT2 >-------------------*/,{
|
||
/*
|
||
** If it's not connected :(
|
||
** -> interrupted by SIGP bit.
|
||
** Jump to start.
|
||
*/
|
||
SCR_FROM_REG (ctest2),
|
||
0,
|
||
SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
|
||
PADDR (start),
|
||
SCR_JUMP,
|
||
PADDR (reselect),
|
||
|
||
}/*-------------------------< RESEL_TMP >-------------------*/,{
|
||
/*
|
||
** The return address in TEMP
|
||
** is in fact the data structure address,
|
||
** so copy it to the DSA register.
|
||
*/
|
||
SCR_COPY (4),
|
||
RADDR (temp),
|
||
RADDR (dsa),
|
||
SCR_JUMP,
|
||
PADDR (prepare),
|
||
|
||
}/*-------------------------< RESEL_LUN >-------------------*/,{
|
||
/*
|
||
** come back to this point
|
||
** to get an IDENTIFY message
|
||
** Wait for a msg_in phase.
|
||
*/
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
||
48,
|
||
/*
|
||
** message phase
|
||
** It's not a sony, it's a trick:
|
||
** read the data without acknowledging it.
|
||
*/
|
||
SCR_FROM_REG (sbdl),
|
||
0,
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (M_IDENTIFY, 0x98)),
|
||
32,
|
||
/*
|
||
** It WAS an Identify message.
|
||
** get it and ack it!
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
||
NADDR (msgin),
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
/*
|
||
** Mask out the LUN.
|
||
*/
|
||
SCR_REG_REG (sfbr, SCR_AND, 0x07),
|
||
0,
|
||
SCR_RETURN,
|
||
0,
|
||
/*
|
||
** No message phase or no IDENTIFY message:
|
||
** return 0.
|
||
*/
|
||
/*>>>*/ SCR_LOAD_SFBR (0),
|
||
0,
|
||
SCR_RETURN,
|
||
0,
|
||
|
||
}/*-------------------------< RESEL_TAG >-------------------*/,{
|
||
/*
|
||
** come back to this point
|
||
** to get a SIMPLE_TAG message
|
||
** Wait for a MSG_IN phase.
|
||
*/
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
||
64,
|
||
/*
|
||
** message phase
|
||
** It's a trick - read the data
|
||
** without acknowledging it.
|
||
*/
|
||
SCR_FROM_REG (sbdl),
|
||
0,
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (M_SIMPLE_TAG)),
|
||
48,
|
||
/*
|
||
** It WAS a SIMPLE_TAG message.
|
||
** get it and ack it!
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
||
NADDR (msgin),
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
/*
|
||
** Wait for the second byte (the tag)
|
||
*/
|
||
/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
||
24,
|
||
/*
|
||
** Get it and ack it!
|
||
*/
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
||
NADDR (msgin),
|
||
SCR_CLR (SCR_ACK|SCR_CARRY),
|
||
0,
|
||
SCR_RETURN,
|
||
0,
|
||
/*
|
||
** No message phase or no SIMPLE_TAG message
|
||
** or no second byte: return 0.
|
||
*/
|
||
/*>>>*/ SCR_LOAD_SFBR (0),
|
||
0,
|
||
SCR_SET (SCR_CARRY),
|
||
0,
|
||
SCR_RETURN,
|
||
0,
|
||
|
||
}/*-------------------------< DATA_IN >--------------------*/,{
|
||
/*
|
||
** Because the size depends on the
|
||
** #define MAX_SCATTER parameter,
|
||
** it is filled in at runtime.
|
||
**
|
||
** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
|
||
** PADDR (no_data),
|
||
** SCR_COPY (sizeof (struct timeval)),
|
||
** (ncrcmd) &time,
|
||
** NADDR (header.stamp.data),
|
||
** SCR_MOVE_TBL ^ SCR_DATA_IN,
|
||
** offsetof (struct dsb, data[ 0]),
|
||
**
|
||
** ##===========< i=1; i<MAX_SCATTER >=========
|
||
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
|
||
** || PADDR (checkatn),
|
||
** || SCR_MOVE_TBL ^ SCR_DATA_IN,
|
||
** || offsetof (struct dsb, data[ i]),
|
||
** ##==========================================
|
||
**
|
||
** SCR_CALL,
|
||
** PADDR (checkatn),
|
||
** SCR_JUMP,
|
||
** PADDR (no_data),
|
||
*/
|
||
0
|
||
}/*-------------------------< DATA_OUT >-------------------*/,{
|
||
/*
|
||
** Because the size depends on the
|
||
** #define MAX_SCATTER parameter,
|
||
** it is filled in at runtime.
|
||
**
|
||
** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
|
||
** PADDR (no_data),
|
||
** SCR_COPY (sizeof (struct timeval)),
|
||
** (ncrcmd) &time,
|
||
** NADDR (header.stamp.data),
|
||
** SCR_MOVE_TBL ^ SCR_DATA_OUT,
|
||
** offsetof (struct dsb, data[ 0]),
|
||
**
|
||
** ##===========< i=1; i<MAX_SCATTER >=========
|
||
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
|
||
** || PADDR (dispatch),
|
||
** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
|
||
** || offsetof (struct dsb, data[ i]),
|
||
** ##==========================================
|
||
**
|
||
** SCR_CALL,
|
||
** PADDR (dispatch),
|
||
** SCR_JUMP,
|
||
** PADDR (no_data),
|
||
**
|
||
**---------------------------------------------------------
|
||
*/
|
||
(u_long)&ident
|
||
|
||
}/*-------------------------< ABORTTAG >-------------------*/,{
|
||
/*
|
||
** Abort a bad reselection.
|
||
** Set the message to ABORT vs. ABORT_TAG
|
||
*/
|
||
SCR_LOAD_REG (scratcha, M_ABORT_TAG),
|
||
0,
|
||
SCR_JUMPR ^ IFFALSE (CARRYSET),
|
||
8,
|
||
}/*-------------------------< ABORT >----------------------*/,{
|
||
SCR_LOAD_REG (scratcha, M_ABORT),
|
||
0,
|
||
SCR_COPY (1),
|
||
RADDR (scratcha),
|
||
NADDR (msgout),
|
||
SCR_SET (SCR_ATN),
|
||
0,
|
||
SCR_CLR (SCR_ACK),
|
||
0,
|
||
/*
|
||
** and send it.
|
||
** we expect an immediate disconnect
|
||
*/
|
||
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
|
||
0,
|
||
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
|
||
NADDR (msgout),
|
||
SCR_COPY (1),
|
||
RADDR (sfbr),
|
||
NADDR (lastmsg),
|
||
SCR_WAIT_DISC,
|
||
0,
|
||
SCR_JUMP,
|
||
PADDR (start),
|
||
}/*--------------------------------------------------------*/
|
||
};
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Fill in #define dependent parts of the script
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
void ncr_script_fill (struct script * scr)
|
||
{
|
||
int i;
|
||
ncrcmd *p;
|
||
|
||
p = scr->tryloop;
|
||
for (i=0; i<MAX_START; i++) {
|
||
*p++ =SCR_COPY (4);
|
||
*p++ =NADDR (squeue[i]);
|
||
*p++ =RADDR (dsa);
|
||
*p++ =SCR_CALL;
|
||
*p++ =PADDR (trysel);
|
||
};
|
||
*p++ =SCR_JUMP;
|
||
*p++ =PADDR(tryloop);
|
||
|
||
assert ((u_long)p == (u_long)&scr->tryloop + sizeof (scr->tryloop));
|
||
|
||
p = scr->data_in;
|
||
|
||
*p++ =SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN));
|
||
*p++ =PADDR (no_data);
|
||
*p++ =SCR_COPY (sizeof (struct timeval));
|
||
*p++ =(ncrcmd) &time;
|
||
*p++ =NADDR (header.stamp.data);
|
||
*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
|
||
*p++ =offsetof (struct dsb, data[ 0]);
|
||
|
||
for (i=1; i<MAX_SCATTER; i++) {
|
||
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
|
||
*p++ =PADDR (checkatn);
|
||
*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
|
||
*p++ =offsetof (struct dsb, data[i]);
|
||
};
|
||
|
||
*p++ =SCR_CALL;
|
||
*p++ =PADDR (checkatn);
|
||
*p++ =SCR_JUMP;
|
||
*p++ =PADDR (no_data);
|
||
|
||
assert ((u_long)p == (u_long)&scr->data_in + sizeof (scr->data_in));
|
||
|
||
p = scr->data_out;
|
||
|
||
*p++ =SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_OUT));
|
||
*p++ =PADDR (no_data);
|
||
*p++ =SCR_COPY (sizeof (struct timeval));
|
||
*p++ =(ncrcmd) &time;
|
||
*p++ =NADDR (header.stamp.data);
|
||
*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
|
||
*p++ =offsetof (struct dsb, data[ 0]);
|
||
|
||
for (i=1; i<MAX_SCATTER; i++) {
|
||
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
|
||
*p++ =PADDR (dispatch);
|
||
*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
|
||
*p++ =offsetof (struct dsb, data[i]);
|
||
};
|
||
|
||
*p++ =SCR_CALL;
|
||
*p++ =PADDR (dispatch);
|
||
*p++ =SCR_JUMP;
|
||
*p++ =PADDR (no_data);
|
||
|
||
assert ((u_long)p == (u_long)&scr->data_out + sizeof (scr->data_out));
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Bind the script to its physical address.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#ifdef __NetBSD__
|
||
|
||
#define ncr_name(np) (np->sc_dev.dv_xname)
|
||
|
||
#else /* !__NetBSD__ */
|
||
|
||
static char *ncr_name (ncb_p np)
|
||
{
|
||
static char name[10];
|
||
int idx;
|
||
|
||
for (idx = 0; idx < NNCR; idx++)
|
||
if (ncrp[idx] == np) {
|
||
sprintf(name, "ncr%d", idx);
|
||
return (name);
|
||
}
|
||
return ("ncr?");
|
||
}
|
||
|
||
#endif
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Copy and rebind a script.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static void ncr_script_copy_and_bind (struct script *script, ncb_p np)
|
||
{
|
||
ncrcmd opcode, new, old;
|
||
ncrcmd *src, *dst, *start, *end;
|
||
int relocs;
|
||
|
||
np->script = (struct script *)
|
||
malloc (sizeof (struct script), M_DEVBUF, M_WAITOK);
|
||
np->p_script = vtophys(np->script);
|
||
|
||
src = script->start;
|
||
dst = np->script->start;
|
||
|
||
start = src;
|
||
end = src + (sizeof(struct script) / 4);
|
||
|
||
while (src < end) {
|
||
|
||
*dst++ = opcode = *src++;
|
||
|
||
/*
|
||
** If we forget to change the length
|
||
** in struct script, a field will be
|
||
** padded with 0. This is an illegal
|
||
** command.
|
||
*/
|
||
|
||
if (opcode == 0)
|
||
printf ("%s: ERROR0 IN SCRIPT at %d.\n",
|
||
ncr_name(np), src-start-1);
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_SCRIPT)
|
||
printf ("%x: <%x>\n",
|
||
(u_long)(src-1), opcode);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** We don't have to decode ALL commands
|
||
*/
|
||
switch (opcode >> 28) {
|
||
|
||
case 0xc:
|
||
/*
|
||
** COPY has TWO arguments.
|
||
*/
|
||
relocs = 2;
|
||
break;
|
||
|
||
case 0x0:
|
||
/*
|
||
** MOVE (absolute address)
|
||
*/
|
||
relocs = 1;
|
||
break;
|
||
|
||
case 0x8:
|
||
/*
|
||
** JUMP / CALL
|
||
** dont't relocate if relative :-)
|
||
*/
|
||
if (opcode & 0x00800000)
|
||
relocs = 0;
|
||
else
|
||
relocs = 1;
|
||
break;
|
||
|
||
case 0x4:
|
||
case 0x5:
|
||
case 0x6:
|
||
case 0x7:
|
||
relocs = 1;
|
||
break;
|
||
|
||
default:
|
||
relocs = 0;
|
||
break;
|
||
};
|
||
|
||
if (relocs) {
|
||
while (relocs--) {
|
||
old = *src++;
|
||
|
||
switch (old & RELOC_MASK) {
|
||
case RELOC_REGISTER:
|
||
new = (old & ~RELOC_MASK) + np->paddr;
|
||
break;
|
||
case RELOC_LABEL:
|
||
new = (old & ~RELOC_MASK) + vtophys(np->script);
|
||
break;
|
||
case RELOC_SOFTC:
|
||
new = (old & ~RELOC_MASK) + vtophys(np);
|
||
break;
|
||
case 0:
|
||
/* Don't relocate a 0 address. */
|
||
if (old == 0) {
|
||
new = old;
|
||
break;
|
||
}
|
||
/* fall through */
|
||
default:
|
||
new = vtophys(old);
|
||
break;
|
||
}
|
||
|
||
*dst++ = new;
|
||
}
|
||
} else
|
||
*dst++ = *src++;
|
||
|
||
};
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Auto configuration.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
/*----------------------------------------------------------
|
||
**
|
||
** Reduce the transfer length to the max value
|
||
** we can transfer safely.
|
||
**
|
||
** Reading a block greater then MAX_SIZE from the
|
||
** raw (character) device exercises a memory leak
|
||
** in the vm subsystem. This is common to ALL devices.
|
||
** We have submitted a description of this bug to
|
||
** <FreeBSD-bugs@freefall.cdrom.com>.
|
||
** It should be fixed in the current release.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
void ncr_min_phys (struct buf *bp)
|
||
{
|
||
if (bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE;
|
||
}
|
||
|
||
/*----------------------------------------------------------
|
||
**
|
||
** Maximal number of outstanding requests per target.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
U_INT32 ncr_info (int unit)
|
||
{
|
||
return (1); /* may be changed later */
|
||
}
|
||
|
||
/*----------------------------------------------------------
|
||
**
|
||
** Probe the hostadapter.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
#ifdef __NetBSD__
|
||
|
||
int
|
||
ncb_probe(parent, self, aux)
|
||
struct device *parent, *self;
|
||
void *aux;
|
||
{
|
||
struct cfdata *cf = self->dv_cfdata;
|
||
struct pci_attach_args *pa = aux;
|
||
|
||
if (!pci_targmatch(cf, pa))
|
||
return 0;
|
||
if (pa->pa_id != 0x00011000)
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
#else /* !__NetBSD__ */
|
||
|
||
static int ncb_probe(pcici_t config_id)
|
||
{
|
||
if (ncr_units >= NNCR) return (-1);
|
||
return (ncr_units);
|
||
}
|
||
|
||
#endif /* !__NetBSD__ */
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Auto configuration: attach and init a host adapter.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#define MIN_ASYNC_PD 40
|
||
#define MIN_SYNC_PD 20
|
||
|
||
#ifdef __NetBSD__
|
||
|
||
int
|
||
ncr_print()
|
||
{
|
||
}
|
||
|
||
void
|
||
ncr_attach(parent, self, aux)
|
||
struct device *parent, *self;
|
||
void *aux;
|
||
{
|
||
struct pci_attach_args *pa = aux;
|
||
int retval;
|
||
ncb_p np = (void *)self;
|
||
|
||
/*
|
||
* XXX
|
||
* Perhaps try to figure what which model chip it is and print that
|
||
* out.
|
||
*/
|
||
printf("\n");
|
||
|
||
/*
|
||
** Try to map the controller chip to
|
||
** virtual and physical memory.
|
||
*/
|
||
|
||
retval = pci_map_mem(pa->pa_tag, 0x14, &np->vaddr, &np->paddr);
|
||
if (retval)
|
||
return;
|
||
|
||
np->sc_ih.ih_fun = ncr_intr;
|
||
np->sc_ih.ih_arg = np;
|
||
np->sc_ih.ih_level = IPL_BIO;
|
||
|
||
retval = pci_map_int(pa->pa_tag, &np->sc_ih);
|
||
if (retval)
|
||
return;
|
||
|
||
#else /* !__NetBSD__ */
|
||
|
||
static int ncr_attach (pcici_t config_id)
|
||
{
|
||
int retval;
|
||
ncb_p np = ncrp[ncr_units];
|
||
|
||
/*
|
||
** allocate structure
|
||
*/
|
||
|
||
if (!np) {
|
||
np = (ncb_p) malloc (sizeof (struct ncb),
|
||
M_DEVBUF, M_NOWAIT);
|
||
if (!np) return (0);
|
||
ncrp[ncr_units]=np;
|
||
}
|
||
|
||
/*
|
||
** initialize structure.
|
||
*/
|
||
|
||
bzero (np, sizeof (*np));
|
||
|
||
/*
|
||
** Try to map the controller chip to
|
||
** virtual and physical memory.
|
||
*/
|
||
|
||
retval = pci_map_mem (config_id, 0x14, &np->vaddr, &np->paddr);
|
||
|
||
if (retval) {
|
||
printf ("%s: pci_map_mem failed.\n", ncr_name (np));
|
||
return (retval);
|
||
};
|
||
|
||
#endif /* !__NetBSD__ */
|
||
|
||
/*
|
||
** Patch script to physical addresses
|
||
*/
|
||
|
||
ncr_script_fill (&script0);
|
||
ncr_script_copy_and_bind (&script0, np);
|
||
|
||
/*
|
||
** init data structure
|
||
*/
|
||
|
||
np -> jump_tcb.l_cmd = SCR_JUMP ;
|
||
np -> jump_tcb.l_paddr = vtophys (&np->script->abort);
|
||
|
||
/*
|
||
** Make the controller's registers available.
|
||
** Now the INB INW INL OUTB OUTW OUTL macros
|
||
** can be used safely.
|
||
*/
|
||
|
||
np->reg = (struct ncr_reg*) np->vaddr;
|
||
|
||
/*
|
||
** Get SCSI addr of host adapter (set by bios?).
|
||
*/
|
||
|
||
np->myaddr = INB(nc_scid) & 0x07;
|
||
if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR;
|
||
|
||
/*
|
||
** Get the value of the chip's clock.
|
||
** Find the right value for scntl3.
|
||
*/
|
||
|
||
ncr_getclock (np);
|
||
|
||
/*
|
||
** Reset chip.
|
||
*/
|
||
|
||
OUTB (nc_istat, SRST);
|
||
OUTB (nc_istat, 0 );
|
||
|
||
/*
|
||
** After SCSI devices have been opened, we cannot
|
||
** reset the bus safely, so we do it here.
|
||
** Interrupt handler does the real work.
|
||
*/
|
||
|
||
OUTB (nc_scntl1, CRST);
|
||
|
||
/*
|
||
** process the reset exception,
|
||
** if interrupts are not enabled yet.
|
||
*/
|
||
ncr_exception (np);
|
||
|
||
#ifdef ANCIENT
|
||
printf ("%s: waiting for scsi devices to settle\n",
|
||
ncr_name (np));
|
||
DELAY (1000000);
|
||
#endif
|
||
printf ("%s scanning for targets 0..%d ($Revision: 2.0.0.16 $%x$)\n",
|
||
ncr_name (np), MAX_TARGET-1, SCSI_NCR_DEBUG);
|
||
|
||
/*
|
||
** Now let the generic SCSI driver
|
||
** look for the SCSI devices on the bus ..
|
||
*/
|
||
|
||
#ifndef ANCIENT
|
||
#ifdef __NetBSD__
|
||
np->sc_link.adapter_softc = np;
|
||
#else /* !__NetBSD__ */
|
||
np->sc_link.adapter_unit = ncr_units;
|
||
#endif /* !__NetBSD__ */
|
||
np->sc_link.adapter_targ = np->myaddr;
|
||
np->sc_link.adapter = &ncr_switch;
|
||
np->sc_link.device = &ncr_dev;
|
||
|
||
#ifdef __NetBSD__
|
||
config_found(self, &np->sc_link, ncr_print);
|
||
#else /* !__NetBSD__ */
|
||
scsi_attachdevs (&np->sc_link);
|
||
#endif /* !__NetBSD__ */
|
||
#else /* ANCIENT */
|
||
scsi_attachdevs (ncr_units, np->myaddr, &ncr_switch);
|
||
#endif /* ANCIENT */
|
||
|
||
/*
|
||
** start the timeout daemon
|
||
*/
|
||
ncr_timeout (np);
|
||
np->lasttime=0;
|
||
|
||
/*
|
||
** Done.
|
||
*/
|
||
|
||
#ifndef __NetBSD__
|
||
ncr_units++;
|
||
return(1);
|
||
#endif
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Process pending device interrupts.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
#ifdef __NetBSD__
|
||
|
||
int
|
||
ncr_intr(np)
|
||
ncb_p np;
|
||
{
|
||
int n = 0;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("[");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
#else /* !__NetBSD__ */
|
||
|
||
static int ncr_intr (int dev)
|
||
{
|
||
ncb_p np;
|
||
int n=0;
|
||
|
||
/*
|
||
** Sanity check
|
||
*/
|
||
|
||
if (dev >= ncr_units) return (0);
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("[");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
assert (dev<NNCR);
|
||
|
||
/*
|
||
** Repeat until no outstanding ints
|
||
*/
|
||
|
||
np = ncrp[dev];
|
||
|
||
#endif /* !__NetBSD__ */
|
||
|
||
while (INB(nc_istat) & (INTF|SIP|DIP)) {
|
||
ncr_exception (np);
|
||
n=1;
|
||
};
|
||
|
||
/*
|
||
** Switch timeout function to slow.
|
||
*/
|
||
|
||
if (n) np->ticks = 100;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("]\n");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
return (n);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Start execution of a SCSI command.
|
||
** This is called from the generic SCSI driver.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static INT32 ncr_start (struct scsi_xfer * xp)
|
||
{
|
||
#ifndef ANCIENT
|
||
#ifdef __NetBSD__
|
||
ncb_p np = xp->sc_link->adapter_softc;
|
||
#else /*__NetBSD__*/
|
||
ncb_p np = ncrp[xp->sc_link->adapter_unit];
|
||
#endif/*__NetBSD__*/
|
||
#else /* ANCIENT */
|
||
ncb_p np = ncrp[xp->adapter];
|
||
#endif /* ANCIENT */
|
||
|
||
struct scsi_generic * cmd = xp->cmd;
|
||
ccb_p cp;
|
||
lcb_p lp;
|
||
tcb_p tp;
|
||
|
||
int i, oldspl, flags = xp->flags;
|
||
u_char ptr, startcode, idmsg;
|
||
u_long msglen, msglen2;
|
||
|
||
/*---------------------------------------------
|
||
**
|
||
** Reset SCSI bus
|
||
**
|
||
** Interrupt handler does the real work.
|
||
**
|
||
**---------------------------------------------
|
||
*/
|
||
|
||
if (flags & SCSI_RESET) {
|
||
OUTB (nc_scntl1, CRST);
|
||
return(COMPLETE);
|
||
};
|
||
|
||
/*---------------------------------------------
|
||
**
|
||
** Some shortcuts ...
|
||
**
|
||
**---------------------------------------------
|
||
*/
|
||
|
||
if ((xp->TARGET == np->myaddr ) ||
|
||
(xp->TARGET >= MAX_TARGET) ||
|
||
(xp->LUN >= MAX_LUN ) ||
|
||
(flags & SCSI_DATA_UIO)) {
|
||
xp->error = XS_DRIVER_STUFFUP;
|
||
return(HAD_ERROR);
|
||
};
|
||
|
||
#ifdef ANCIENT
|
||
/*---------------------------------------------
|
||
** Ancient version of <sys/scsi/sd.c>
|
||
** doesn't set the DATA_IN/DATA_OUT bits.
|
||
** So we have to fix it ..
|
||
**---------------------------------------------
|
||
*/
|
||
|
||
switch (cmd->opcode) {
|
||
case 0x1a: /* MODE_SENSE */
|
||
case 0x25: /* READ_CAPACITY */
|
||
case 0x28: /* READ_BIG (10) */
|
||
xp->flags |= SCSI_DATA_IN;
|
||
break;
|
||
case 0x2a: /* WRITE_BIG(10) */
|
||
xp->flags |= SCSI_DATA_OUT;
|
||
break;
|
||
};
|
||
#endif /* ANCIENT */
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) {
|
||
PRINT_ADDR(xp);
|
||
printf ("CMD=%x F=%x L=%x ", cmd->opcode,
|
||
xp->flags, xp->datalen);
|
||
}
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*--------------------------------------------
|
||
**
|
||
** Sanity checks ...
|
||
** copied from Elischer's Adaptec driver.
|
||
**
|
||
**--------------------------------------------
|
||
*/
|
||
|
||
flags = xp->flags;
|
||
if (!(flags & INUSE)) {
|
||
printf("%s: ?INUSE?\n", ncr_name (np));
|
||
xp->flags |= INUSE;
|
||
};
|
||
|
||
if(flags & ITSDONE) {
|
||
printf("%s: ?ITSDONE?\n", ncr_name (np));
|
||
xp->flags &= ~ITSDONE;
|
||
};
|
||
|
||
if (xp->bp)
|
||
flags |= (SCSI_NOSLEEP); /* just to be sure */
|
||
|
||
/*---------------------------------------------------
|
||
**
|
||
** Assign a ccb
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
if (!(cp=ncr_get_ccb (np, flags, xp->TARGET, xp->LUN))) {
|
||
printf ("%s: no ccb.\n", ncr_name (np));
|
||
xp->error = XS_DRIVER_STUFFUP;
|
||
return(TRY_AGAIN_LATER);
|
||
};
|
||
|
||
/*---------------------------------------------------
|
||
**
|
||
** timestamp
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
bzero (&cp->phys.header.stamp, sizeof (struct tstamp));
|
||
cp->phys.header.stamp.start = time;
|
||
|
||
/*---------------------------------------------------
|
||
**
|
||
** sync negotiation required?
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
tp = &np->target[xp->TARGET];
|
||
|
||
if ((cmd->opcode!=0x12) && (tp->period)) {
|
||
|
||
startcode = HS_BUSY;
|
||
|
||
} else if (!(tp->inqdata[7] & INQ7_SYNC)) {
|
||
|
||
tp->minsync = 255;
|
||
tp->maxoffs = 8 ;
|
||
tp->period =0xffff;
|
||
startcode = HS_BUSY;
|
||
|
||
} else {
|
||
/*
|
||
** minsync unit is 4ns !
|
||
*/
|
||
|
||
u_long minsync = tp->usrsync;
|
||
|
||
if (minsync < 25) minsync=25;
|
||
|
||
/*
|
||
** if not scsi 2
|
||
** don't believe FAST!
|
||
*/
|
||
|
||
if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2)
|
||
minsync=50;
|
||
|
||
/*
|
||
** our limit ..
|
||
*/
|
||
|
||
if (minsync < np->ns_sync)
|
||
minsync = np->ns_sync;
|
||
|
||
/*
|
||
** divider limit
|
||
*/
|
||
|
||
if (minsync > (np->ns_sync * 11) / 4)
|
||
minsync = 255;
|
||
|
||
tp->minsync = minsync;
|
||
tp->maxoffs = (minsync<255 ? 8 : 0);
|
||
|
||
startcode = HS_NEGOTIATE;
|
||
};
|
||
|
||
/*---------------------------------------------------
|
||
**
|
||
** choose a new tag ...
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
if ((lp = tp->lp[xp->LUN]) && (lp->usetags)) {
|
||
/*
|
||
** assign a tag to this ccb!
|
||
*/
|
||
while (!cp->tag) {
|
||
ccb_p cp2 = lp->next_ccb;
|
||
lp->lasttag = lp->lasttag % 255 + 1;
|
||
while (cp2 && cp2->tag != lp->lasttag)
|
||
cp2 = cp2->next_ccb;
|
||
if (cp2) continue;
|
||
cp->tag=lp->lasttag;
|
||
PRINT_ADDR(xp);
|
||
printf ("using tag #%d.\n", cp->tag);
|
||
};
|
||
} else {
|
||
cp->tag=0;
|
||
#if !defined(ANCIENT) && !defined(__NetBSD__)
|
||
/*
|
||
** @GENSCSI@ Bug in "/sys/scsi/cd.c"
|
||
**
|
||
** /sys/scsi/cd.c initializes opennings with 2.
|
||
** Our info value of 1 is not respected.
|
||
*/
|
||
if (xp->sc_link && xp->sc_link->opennings) {
|
||
PRINT_ADDR(xp);
|
||
printf ("opennings set to 0.\n");
|
||
xp->sc_link->opennings = 0;
|
||
};
|
||
#endif
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** Build the identify / tag / sdtr message
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
idmsg = (cp==&np->ccb ? 0x80 : 0xc0) | xp->LUN;
|
||
|
||
cp -> scsi_smsg [0] = idmsg;
|
||
msglen=1;
|
||
|
||
if (cp->tag) {
|
||
|
||
/*
|
||
** Ordered write ops, unordered read ops.
|
||
*/
|
||
switch (cmd->opcode) {
|
||
case 0x08: /* READ_SMALL (6) */
|
||
case 0x28: /* READ_BIG (10) */
|
||
case 0xa8: /* READ_HUGE (12) */
|
||
cp -> scsi_smsg [msglen] = M_SIMPLE_TAG;
|
||
break;
|
||
default:
|
||
cp -> scsi_smsg [msglen] = M_ORDERED_TAG;
|
||
}
|
||
|
||
/*
|
||
** can be overwritten by ncrstat
|
||
*/
|
||
switch (np->order) {
|
||
|
||
case M_SIMPLE_TAG:
|
||
cp -> scsi_smsg [msglen] = M_SIMPLE_TAG;
|
||
break;
|
||
|
||
case M_ORDERED_TAG:
|
||
cp -> scsi_smsg [msglen] = M_ORDERED_TAG;
|
||
break;
|
||
};
|
||
msglen++;
|
||
|
||
cp -> scsi_smsg [msglen++] = cp -> tag;
|
||
}
|
||
if (startcode==HS_NEGOTIATE) {
|
||
cp -> scsi_smsg [msglen++] = M_EXTENDED;
|
||
cp -> scsi_smsg [msglen++] = 3;
|
||
cp -> scsi_smsg [msglen++] = M_X_SDTR;
|
||
cp -> scsi_smsg [msglen++] = np->target[xp->TARGET].minsync;
|
||
cp -> scsi_smsg [msglen++] = np->target[xp->TARGET].maxoffs;
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** Build the identify / sdtr message for getcc
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
cp -> scsi_smsg2 [0] = idmsg;
|
||
msglen2 = 1;
|
||
if (np->target[xp->TARGET].inqdata[7]&INQ7_SYNC) {
|
||
cp -> scsi_smsg2 [1] = M_EXTENDED;
|
||
cp -> scsi_smsg2 [2] = 3;
|
||
cp -> scsi_smsg2 [3] = M_X_SDTR;
|
||
cp -> scsi_smsg2 [4] = np->target[xp->TARGET].minsync;
|
||
cp -> scsi_smsg2 [5] = np->target[xp->TARGET].maxoffs;
|
||
msglen2 = 6;
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** Build the data descriptors
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
if (ncr_scatter (&cp->phys,
|
||
(vm_offset_t) xp->data,
|
||
(vm_size_t) xp->datalen)) {
|
||
xp->error = XS_DRIVER_STUFFUP;
|
||
ncr_free_ccb(np, cp, flags);
|
||
return(HAD_ERROR);
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** Set the SAVED_POINTER.
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
if (flags & SCSI_DATA_IN) {
|
||
cp->phys.header.savep = vtophys (&np->script->data_in);
|
||
} else if (flags & SCSI_DATA_OUT) {
|
||
cp->phys.header.savep = vtophys (&np->script->data_out);
|
||
} else {
|
||
cp->phys.header.savep = vtophys (&np->script->no_data);
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** fill ccb
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
/*
|
||
** physical -> virtual translation
|
||
*/
|
||
cp->phys.header.cp = cp;
|
||
/*
|
||
** Generic SCSI command
|
||
*/
|
||
cp->xfer = xp;
|
||
/*
|
||
** Startqueue
|
||
*/
|
||
cp->phys.header.launch.l_paddr = vtophys (&np->script->select);
|
||
cp->phys.header.launch.l_cmd = SCR_JUMP;
|
||
/*
|
||
** select
|
||
*/
|
||
cp->phys.select.sel_id = xp->TARGET;
|
||
cp->phys.select.sel_scntl3 = np->rv_scntl3;
|
||
cp->phys.select.sel_sxfer = np->target[xp->TARGET].sval;
|
||
/*
|
||
** message
|
||
*/
|
||
cp->phys.smsg.addr = vtophys (&cp->scsi_smsg );
|
||
cp->phys.smsg.size = msglen;
|
||
cp->phys.smsg2.addr = vtophys (&cp->scsi_smsg2);
|
||
cp->phys.smsg2.size = msglen2;
|
||
/*
|
||
** command
|
||
*/
|
||
#ifdef ANCIENT
|
||
bcopy (cmd, &cp->cmd, sizeof (cp->cmd));
|
||
cp->phys.cmd.addr = vtophys (&cp->cmd);
|
||
#else /* ANCIENT */
|
||
cp->phys.cmd.addr = vtophys (cmd);
|
||
#endif /* ANCIENT */
|
||
cp->phys.cmd.size = xp->cmdlen;
|
||
/*
|
||
** sense data
|
||
*/
|
||
cp->phys.sense.addr = vtophys (&cp->xfer->sense);
|
||
cp->phys.sense.size = sizeof(struct scsi_sense_data);
|
||
/*
|
||
** status
|
||
*/
|
||
cp->scs2_status = S_ILLEGAL;
|
||
cp->scsi_status = S_ILLEGAL;
|
||
cp->sync_status = np->target[xp->TARGET].sval;
|
||
cp->host_status = startcode;
|
||
cp->treatment = np->target[xp->TARGET].criminal;
|
||
cp->parity_errs = 0;
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** Critical region: starting this job.
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
oldspl = 0; /* for the sake of gcc */
|
||
if (!(flags & SCSI_NOMASK)) oldspl = splbio();
|
||
np->lock++;
|
||
|
||
/*
|
||
** reselect pattern and activate this job.
|
||
*/
|
||
|
||
cp->jump_ccb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (cp->tag)));
|
||
cp->tlimit = time.tv_sec + xp->timeout / 1000 + 2;
|
||
cp->magic = CCB_MAGIC;
|
||
|
||
/*
|
||
** insert into startqueue.
|
||
*/
|
||
|
||
ptr = np->squeueput + 1;
|
||
if (ptr >= MAX_START) ptr=0;
|
||
np->squeue [ptr ] = vtophys(&np->script->idle);
|
||
np->squeue [np->squeueput] = vtophys(&cp->phys);
|
||
np->squeueput = ptr;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if(ncr_debug & DEBUG_QUEUE)
|
||
printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np),
|
||
np->squeueput, np->script->startpos[0]-(vtophys(&np->script->tryloop)));
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** Script processor may be waiting for reconnect.
|
||
** Wake it up.
|
||
*/
|
||
OUTB (nc_istat, SIGP);
|
||
|
||
/*
|
||
** If interrupts are enabled, return now.
|
||
** Command is successfully queued.
|
||
*/
|
||
|
||
np->lock--;
|
||
if (!(flags & SCSI_NOMASK)) {
|
||
splx (oldspl);
|
||
if (np->lasttime) {
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if(ncr_debug & DEBUG_TINY) printf ("Q");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
return(SUCCESSFULLY_QUEUED);
|
||
};
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** Interrupts not yet enabled - have to poll.
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_POLL) printf("P");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
for (i=xp->timeout; i && !(xp->flags & ITSDONE);i--) {
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if ((ncr_debug & DEBUG_POLL) && (cp->host_status))
|
||
printf ("%c", (cp->host_status & 0xf) + '0');
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
DELAY (1000);
|
||
ncr_exception (np);
|
||
};
|
||
|
||
/*
|
||
** Abort if command not done.
|
||
*/
|
||
if (!(xp->flags & ITSDONE)) {
|
||
printf ("%s: aborting job ...\n", ncr_name (np));
|
||
OUTB (nc_istat, CABRT);
|
||
DELAY (100000);
|
||
OUTB (nc_istat, SIGP);
|
||
ncr_exception (np);
|
||
};
|
||
|
||
if (!(xp->flags & ITSDONE)) {
|
||
printf ("%s: abortion failed at %x.\n",
|
||
ncr_name (np), INL(nc_dsp));
|
||
ncr_init (np, "timeout", HS_TIMEOUT);
|
||
};
|
||
|
||
if (!(xp->flags & ITSDONE)) {
|
||
cp-> host_status = HS_SEL_TIMEOUT;
|
||
ncr_complete (np, cp);
|
||
};
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESULT) {
|
||
printf ("%s: result: %x %x %x.\n",
|
||
ncr_name (np), cp->host_status,
|
||
cp->scsi_status, cp->scs2_status);
|
||
};
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
if (!(flags & SCSI_NOMASK))
|
||
return (SUCCESSFULLY_QUEUED);
|
||
switch (xp->error) {
|
||
case 0 : return (COMPLETE);
|
||
case XS_BUSY: return (TRY_AGAIN_LATER);
|
||
};
|
||
return (HAD_ERROR);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Complete execution of a SCSI command.
|
||
** Signal completion to the generic SCSI driver.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
void ncr_complete (ncb_p np, ccb_p cp)
|
||
{
|
||
struct scsi_xfer * xp;
|
||
tcb_p tp;
|
||
lcb_p lp;
|
||
|
||
/*
|
||
** Sanity check
|
||
*/
|
||
|
||
if (!cp || !cp->magic || !cp->xfer) return;
|
||
cp->magic = 1;
|
||
cp->tlimit= 0;
|
||
|
||
/*
|
||
** No Reselect anymore.
|
||
*/
|
||
cp->jump_ccb.l_cmd = (SCR_JUMP);
|
||
|
||
/*
|
||
** No starting.
|
||
*/
|
||
cp->phys.header.launch.l_paddr= vtophys (&np->script->idle);
|
||
|
||
/*
|
||
** timestamp
|
||
*/
|
||
ncb_profile (np, cp);
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY)
|
||
printf ("CCB=%x STAT=%x/%x/%x\n", (u_long)cp & 0xfff,
|
||
cp->host_status,cp->scsi_status,cp->scs2_status);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
xp = cp->xfer;
|
||
cp->xfer = NULL;
|
||
tp = &np->target[xp->TARGET];
|
||
lp = tp->lp[xp->LUN];
|
||
|
||
/*
|
||
** Check for parity errors.
|
||
*/
|
||
|
||
if (cp->parity_errs) {
|
||
PRINT_ADDR(xp);
|
||
printf ("%d parity error(s), fallback.\n", cp->parity_errs);
|
||
/*
|
||
** fallback to asynch transfer.
|
||
*/
|
||
tp->usrsync=255;
|
||
tp->period = 0;
|
||
};
|
||
|
||
/*
|
||
** Check the status.
|
||
*/
|
||
if ( (cp->host_status == HS_COMPLETE)
|
||
&& (cp->scsi_status == S_GOOD)) {
|
||
|
||
/*
|
||
** All went well.
|
||
*/
|
||
xp->resid = 0;
|
||
|
||
/*
|
||
** Try to assign a ccb to this nexus
|
||
*/
|
||
ncr_alloc_ccb (np, xp);
|
||
|
||
/*
|
||
** On inquire cmd (0x12) save some data.
|
||
*/
|
||
#ifdef ANCIENT
|
||
if (cp->cmd.opcode == 0x12) {
|
||
#else /* ANCIENT */
|
||
if (xp->cmd->opcode == 0x12) {
|
||
#endif /* ANCIENT */
|
||
bcopy ( xp->data,
|
||
&tp->inqdata,
|
||
sizeof (tp->inqdata));
|
||
ncr_setmaxtags (tp, tp->usrtags);
|
||
tp->period=0;
|
||
|
||
/*
|
||
** lookup the device in the speciality table.
|
||
*/
|
||
tp->criminal = ncr_lookup ((char*) &tp->inqdata[0]);
|
||
if (tp->criminal) {
|
||
PRINT_ADDR(xp);
|
||
printf ("misfeature=%x.\n", tp->criminal);
|
||
};
|
||
};
|
||
|
||
if (!tp->sval) {
|
||
PRINT_ADDR(xp);
|
||
printf ("asynchronous.\n");
|
||
tp->sval = 0xe0;
|
||
};
|
||
|
||
/*
|
||
** Announce changes to the generic driver
|
||
*/
|
||
if (lp) {
|
||
ncr_settags (tp, lp);
|
||
if (lp->reqlink != lp->actlink)
|
||
ncr_opennings (np, lp, xp);
|
||
};
|
||
|
||
#ifdef DK
|
||
dk_xfer[DK] ++;
|
||
dk_wds [DK] += xp->datalen/64;
|
||
dk_wpms[DK] = 1000000;
|
||
#endif /* DK */
|
||
|
||
tp->bytes += xp->datalen;
|
||
tp->transfers ++;
|
||
|
||
} else if (xp->flags & SCSI_ERR_OK) {
|
||
|
||
/*
|
||
** Not correct, but errors expected.
|
||
*/
|
||
xp->resid = 0;
|
||
|
||
} else if ((cp->host_status == HS_COMPLETE)
|
||
&& (cp->scsi_status == S_CHECK_COND)
|
||
&& (cp->scs2_status == S_GOOD)) {
|
||
|
||
/*
|
||
** Check condition code
|
||
*/
|
||
xp->error = XS_SENSE;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & (DEBUG_RESULT|DEBUG_TINY)) {
|
||
u_char * p = (u_char*) & xp->sense;
|
||
int i;
|
||
printf ("\n%s: sense data:", ncr_name (np));
|
||
for (i=0; i<14; i++) printf (" %x", *p++);
|
||
printf (".\n");
|
||
};
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
} else if ((cp->host_status == HS_COMPLETE)
|
||
&& (cp->scsi_status == S_BUSY)) {
|
||
|
||
/*
|
||
** Target is busy.
|
||
*/
|
||
xp->error = XS_BUSY;
|
||
|
||
} else if ((cp->host_status == HS_SEL_TIMEOUT)
|
||
|| (cp->host_status == HS_TIMEOUT)) {
|
||
|
||
/*
|
||
** No response
|
||
*/
|
||
xp->error = XS_TIMEOUT;
|
||
|
||
} else {
|
||
|
||
/*
|
||
** Other protocol messes
|
||
*/
|
||
PRINT_ADDR(xp);
|
||
printf ("COMMAND FAILED (%x %x %x) @%x.\n",
|
||
cp->host_status, cp->scsi_status, cp->scs2_status,
|
||
cp);
|
||
|
||
xp->error = XS_DRIVER_STUFFUP;
|
||
}
|
||
|
||
xp->flags |= ITSDONE;
|
||
|
||
/*
|
||
** trace output
|
||
*/
|
||
|
||
if (tp->usrflag & UF_TRACE) {
|
||
u_char * p;
|
||
int i;
|
||
PRINT_ADDR(xp);
|
||
printf (" CMD:");
|
||
#ifdef ANCIENT
|
||
p = (u_char*) &cp->cmd.opcode;
|
||
#else /* ANCIENT */
|
||
p = (u_char*) &xp->cmd->opcode;
|
||
#endif /* ANCIENT */
|
||
for (i=0; i<xp->cmdlen; i++) printf (" %x", *p++);
|
||
|
||
if (cp->host_status==HS_COMPLETE) {
|
||
switch (cp->scsi_status) {
|
||
case S_GOOD:
|
||
printf (" GOOD");
|
||
break;
|
||
case S_CHECK_COND:
|
||
printf (" SENSE:");
|
||
p = (u_char*) &xp->sense;
|
||
#ifdef ANCIENT
|
||
for (i=0; i<sizeof(xp->sense); i++)
|
||
#else /* ANCIENT */
|
||
for (i=0; i<xp->req_sense_length; i++)
|
||
#endif /* ANCIENT */
|
||
printf (" %x", *p++);
|
||
break;
|
||
default:
|
||
printf (" STAT: %x\n", cp->scsi_status);
|
||
break;
|
||
};
|
||
} else printf (" HOSTERROR: %x", cp->host_status);
|
||
printf ("\n");
|
||
};
|
||
|
||
/*
|
||
** Free this ccb
|
||
*/
|
||
ncr_free_ccb (np, cp, xp->flags);
|
||
|
||
/*
|
||
** signal completion to generic driver.
|
||
*/
|
||
#ifdef ANCIENT
|
||
if (xp->when_done)
|
||
(*(xp->when_done))(xp->done_arg,xp->done_arg2);
|
||
#else /* ANCIENT */
|
||
scsi_done (xp);
|
||
#endif /* ANCIENT */
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Signal all (or one) control block done.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
void ncr_wakeup (ncb_p np, u_long code)
|
||
{
|
||
/*
|
||
** Starting at the default ccb and following
|
||
** the links, complete all jobs with a
|
||
** host_status greater than "disconnect".
|
||
**
|
||
** If the "code" parameter is not zero,
|
||
** complete all jobs that are not IDLE.
|
||
*/
|
||
|
||
ccb_p cp = &np->ccb;
|
||
while (cp) {
|
||
switch (cp->host_status) {
|
||
|
||
case HS_IDLE:
|
||
break;
|
||
|
||
case HS_DISCONNECT:
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if(ncr_debug & DEBUG_TINY) printf ("D");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
/* fall through */
|
||
|
||
case HS_BUSY:
|
||
case HS_NEGOTIATE:
|
||
if (!code) break;
|
||
cp->host_status = code;
|
||
|
||
/* fall through */
|
||
|
||
default:
|
||
ncr_complete (np, cp);
|
||
break;
|
||
};
|
||
cp = cp -> link_ccb;
|
||
};
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Start NCR chip.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
void ncr_init (ncb_p np, char * msg, u_long code)
|
||
{
|
||
int i;
|
||
u_long usrsync;
|
||
|
||
/*
|
||
** Reset chip.
|
||
*/
|
||
|
||
OUTB (nc_istat, SRST );
|
||
|
||
/*
|
||
** Message.
|
||
*/
|
||
|
||
if (msg) printf ("%s: restart (%s).\n", ncr_name (np), msg);
|
||
|
||
/*
|
||
** Clear Start Queue
|
||
*/
|
||
|
||
for (i=0;i<MAX_START;i++)
|
||
np -> squeue [i] = vtophys (&np->script->idle);
|
||
|
||
/*
|
||
** Start at first entry.
|
||
*/
|
||
|
||
np->squeueput = 0;
|
||
np->script->startpos[0] = vtophys (&np->script->tryloop);
|
||
np->script->start0 [0] = SCR_INT ^ IFFALSE (0);
|
||
|
||
/*
|
||
** Wakeup all pending jobs.
|
||
*/
|
||
|
||
ncr_wakeup (np, code);
|
||
|
||
/*
|
||
** Init chip.
|
||
*/
|
||
|
||
OUTB (nc_istat, 0 ); /* Remove Reset, abort ... */
|
||
OUTB (nc_scntl0, 0xca ); /* full arb., ena parity, par->ATN */
|
||
OUTB (nc_scntl1, 0x00 ); /* odd parity, and remove CRST!! */
|
||
OUTB (nc_scntl3, np->rv_scntl3);/* timing prescaler */
|
||
OUTB (nc_scid , 0x40|np->myaddr); /* host adapter SCSI address */
|
||
OUTB (nc_respid, 1<<np->myaddr);/* id to respond to */
|
||
OUTB (nc_istat , SIGP ); /* Signal Process */
|
||
OUTB (nc_dmode , 0xc ); /* Burst length = 16 transfer */
|
||
OUTB (nc_dcntl , NOCOM ); /* no single step mode, protect SFBR*/
|
||
OUTB (nc_ctest4, 0x08 ); /* enable master parity checking */
|
||
OUTB (nc_stest2, EXT ); /* Extended Sreq/Sack filtering */
|
||
OUTB (nc_stest3, TE ); /* TolerANT enable */
|
||
OUTB (nc_stime0, 0xfb ); /* HTH = 1.6sec STO = 0.1 sec. */
|
||
|
||
/*
|
||
** Reinitialize usrsync.
|
||
** Have to renegotiate synch mode.
|
||
*/
|
||
|
||
usrsync = 255;
|
||
if (SCSI_NCR_MAX_SYNC) {
|
||
u_long period;
|
||
period =1000000/SCSI_NCR_MAX_SYNC; /* ns = 10e6 / kHz */
|
||
if (period <= 11 * np->ns_sync) {
|
||
if (period < 4 * np->ns_sync)
|
||
usrsync = np->ns_sync;
|
||
else
|
||
usrsync = period / 4;
|
||
};
|
||
};
|
||
|
||
for (i=0;i<MAX_TARGET;i++) {
|
||
tcb_p tp = &np->target[i];
|
||
tp->period = 0;
|
||
tp->sval = 0;
|
||
tp->usrsync = usrsync;
|
||
}
|
||
|
||
/*
|
||
** enable ints
|
||
*/
|
||
|
||
OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST);
|
||
OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
|
||
|
||
/*
|
||
** Start script processor.
|
||
*/
|
||
|
||
OUTL (nc_dsp, vtophys (&np->script->start));
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
** Switch sync mode for current job and it's target
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static void ncr_setsync (ncb_p np, ccb_p cp, u_char sxfer)
|
||
{
|
||
struct scsi_xfer *xp;
|
||
u_short target = INB (nc_ctest0)&7;
|
||
tcb_p tp;
|
||
|
||
assert (cp);
|
||
if (!cp) return;
|
||
|
||
xp = cp->xfer;
|
||
assert (xp);
|
||
if (!xp) return;
|
||
assert (target == xp->TARGET & 7);
|
||
|
||
tp = &np->target[target];
|
||
tp->period= sxfer&0xf ? ((sxfer>>5)+4) * np->ns_sync : 0xffff;
|
||
if (tp->sval == sxfer) return;
|
||
tp->sval = sxfer;
|
||
|
||
/*
|
||
** Bells and whistles ;-)
|
||
*/
|
||
PRINT_ADDR(xp);
|
||
if (sxfer & 0x0f) {
|
||
/*
|
||
** Disable extended Sreq/Sack filtering
|
||
*/
|
||
if (tp->period <= 200) OUTB (nc_stest2, 0);
|
||
printf ("%s%dns (%d Mb/sec) offset %d.\n",
|
||
tp->period<200 ? "FAST SCSI-2 ":"",
|
||
tp->period, (1000+tp->period/2)/tp->period,
|
||
sxfer & 0x0f);
|
||
} else {
|
||
printf ("asynchronous.\n");
|
||
}
|
||
|
||
/*
|
||
** set actual value and sync_status
|
||
*/
|
||
OUTB (nc_scr3 , sxfer);
|
||
OUTB (nc_sxfer, sxfer);
|
||
|
||
/*
|
||
** patch ALL ccbs of this target.
|
||
*/
|
||
for (cp = &np->ccb; cp; cp = cp->link_ccb) {
|
||
if (!cp->xfer) continue;
|
||
if (cp->xfer->TARGET != target) continue;
|
||
cp->sync_status = sxfer;
|
||
};
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
** Switch tagged mode for a target.
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static void ncr_setmaxtags (tcb_p tp, u_long usrtags)
|
||
{
|
||
int l;
|
||
tp->usrtags = usrtags;
|
||
for (l=0; l<MAX_LUN; l++) {
|
||
lcb_p lp;
|
||
if (!tp) break;
|
||
lp=tp->lp[l];
|
||
if (!lp) continue;
|
||
ncr_settags (tp, lp);
|
||
};
|
||
}
|
||
|
||
static void ncr_settags (tcb_p tp, lcb_p lp)
|
||
{
|
||
u_char reqtags, tmp;
|
||
|
||
if ((!tp) || (!lp)) return;
|
||
|
||
/*
|
||
** only devices capable of tagges commands
|
||
** only disk devices
|
||
** only if enabled by user ..
|
||
*/
|
||
if (( tp->inqdata[7] & INQ7_QUEUE) && ((tp->inqdata[0] & 0x1f)==0x00)
|
||
&& tp->usrtags) {
|
||
reqtags = tp->usrtags;
|
||
if (lp->actlink <= 1)
|
||
lp->usetags=reqtags;
|
||
} else {
|
||
reqtags = 1;
|
||
if (lp->actlink <= 1)
|
||
lp->usetags=0;
|
||
};
|
||
|
||
/*
|
||
** don't announce more than available.
|
||
*/
|
||
tmp = lp->actccbs;
|
||
if (tmp > reqtags) tmp = reqtags;
|
||
lp->reqlink = tmp;
|
||
|
||
/*
|
||
** don't discard if announced.
|
||
*/
|
||
tmp = lp->actlink;
|
||
if (tmp < reqtags) tmp = reqtags;
|
||
lp->reqccbs = tmp;
|
||
}
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** handle user commands
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
static void ncr_usercmd (ncb_p np)
|
||
{
|
||
u_char t;
|
||
tcb_p tp;
|
||
|
||
switch (np->user.cmd) {
|
||
|
||
case 0: return;
|
||
|
||
case UC_SETSYNC:
|
||
for (t=0; t<MAX_TARGET; t++) {
|
||
if (!((np->user.target>>t)&1)) continue;
|
||
tp = &np->target[t];
|
||
tp->usrsync = np->user.data;
|
||
tp->period = 0;
|
||
};
|
||
break;
|
||
|
||
case UC_SETTAGS:
|
||
if (np->user.data > SCSI_NCR_MAX_TAGS)
|
||
break;
|
||
for (t=0; t<MAX_TARGET; t++) {
|
||
if (!((np->user.target>>t)&1)) continue;
|
||
ncr_setmaxtags (&np->target[t], np->user.data);
|
||
};
|
||
break;
|
||
|
||
case UC_SETDEBUG:
|
||
ncr_debug = np->user.data;
|
||
break;
|
||
|
||
case UC_SETORDER:
|
||
np->order = np->user.data;
|
||
break;
|
||
|
||
case UC_SETWIDE:
|
||
for (t=0; t<MAX_TARGET; t++) {
|
||
if (!((np->user.target>>t)&1)) continue;
|
||
tp = &np->target[t];
|
||
tp->usrwide = np->user.data;
|
||
tp->_1 = 0;
|
||
};
|
||
break;
|
||
|
||
case UC_SETFLAG:
|
||
for (t=0; t<MAX_TARGET; t++) {
|
||
if (!((np->user.target>>t)&1)) continue;
|
||
tp = &np->target[t];
|
||
tp->usrflag = np->user.data;
|
||
};
|
||
break;
|
||
}
|
||
np->user.cmd=0;
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** ncr timeout handler.
|
||
**
|
||
**
|
||
**==========================================================
|
||
**
|
||
** Misused to keep the driver running when
|
||
** interrupts are not configured correctly.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
static void ncr_timeout (ncb_p np)
|
||
{
|
||
u_long thistime = time.tv_sec;
|
||
u_long step = np->ticks;
|
||
u_long count = 0;
|
||
long signed t;
|
||
ccb_p cp;
|
||
|
||
if (np->lasttime != thistime) {
|
||
np->lasttime = thistime;
|
||
|
||
ncr_usercmd (np);
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** handle ncr chip timeouts
|
||
**
|
||
** Assumption:
|
||
** We have a chance to arbitrate for the
|
||
** SCSI bus at least every 10 seconds.
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
t = thistime - np->heartbeat;
|
||
|
||
if (t<2) np->latetime=0; else np->latetime++;
|
||
|
||
if (np->latetime>2) {
|
||
/*
|
||
** If there are no requests, the script
|
||
** processor will sleep on SEL_WAIT_RESEL.
|
||
** But we have to check whether it died.
|
||
** Let's wake it up.
|
||
*/
|
||
OUTB (nc_istat, SIGP);
|
||
};
|
||
|
||
if (np->latetime>10) {
|
||
/*
|
||
** Although we tried to wakeup it,
|
||
** the script processor didn't answer.
|
||
**
|
||
** May be a target is hanging,
|
||
** or another initator lets a tape device
|
||
** rewind with disconnect disabled :-(
|
||
**
|
||
** We won't accept that.
|
||
*/
|
||
printf ("%s: reset by timeout.\n", ncr_name (np));
|
||
OUTB (nc_istat, SRST);
|
||
OUTB (nc_istat, 0);
|
||
if (INB (nc_sbcl) & CBSY)
|
||
OUTB (nc_scntl1, CRST);
|
||
ncr_init (np, NULL, HS_TIMEOUT);
|
||
np->heartbeat = thistime;
|
||
};
|
||
|
||
/*----------------------------------------------------
|
||
**
|
||
** handle ccb timeouts
|
||
**
|
||
**----------------------------------------------------
|
||
*/
|
||
|
||
for (cp=&np->ccb; cp; cp=cp->link_ccb) {
|
||
/*
|
||
** look for timed out ccbs.
|
||
*/
|
||
if (!cp->host_status) continue;
|
||
count++;
|
||
if (cp->tlimit > thistime) continue;
|
||
|
||
/*
|
||
** Disable reselect.
|
||
** Remove it from startqueue.
|
||
*/
|
||
cp->jump_ccb.l_cmd = (SCR_JUMP);
|
||
if (cp->phys.header.launch.l_paddr ==
|
||
vtophys (&np->script->select)) {
|
||
printf ("%s: timeout ccb=%x (skip)\n",
|
||
ncr_name (np), cp);
|
||
cp->phys.header.launch.l_paddr
|
||
= vtophys (&np->script->skip);
|
||
};
|
||
|
||
switch (cp->host_status) {
|
||
|
||
case HS_BUSY:
|
||
case HS_NEGOTIATE:
|
||
/*
|
||
** still in start queue ?
|
||
*/
|
||
if (cp->phys.header.launch.l_paddr ==
|
||
vtophys (&np->script->skip))
|
||
continue;
|
||
|
||
/* fall through */
|
||
case HS_DISCONNECT:
|
||
cp->host_status=HS_TIMEOUT;
|
||
};
|
||
cp->tag = 0;
|
||
|
||
/*
|
||
** wakeup this ccb.
|
||
*/
|
||
{
|
||
int oldspl = splbio();
|
||
ncr_complete (np, cp);
|
||
splx (oldspl);
|
||
};
|
||
};
|
||
}
|
||
|
||
timeout (TIMEOUT ncr_timeout, (caddr_t) np, step ? step : 1);
|
||
|
||
if ((INB(nc_istat) & (INTF|SIP|DIP)) && !np->lock) {
|
||
|
||
/*
|
||
** Process pending interrupts.
|
||
*/
|
||
|
||
int oldspl = splbio ();
|
||
#ifndef __NetBSD__
|
||
u_long imask = getirr();
|
||
#endif
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("{");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
ncr_exception (np);
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("}");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
#ifndef __NetBSD__
|
||
imask &=~getirr();
|
||
splx (oldspl);
|
||
|
||
/*
|
||
** automagically find int vector.
|
||
*/
|
||
if (imask) {
|
||
if ((imask != np->imask) && (np->mcount < 100))
|
||
np->mcount = 0;
|
||
np->imask = imask;
|
||
np->mcount++;
|
||
};
|
||
|
||
/*
|
||
** a hint to the user :-)
|
||
*/
|
||
if (np->mcount == 100) {
|
||
if (np->imask & (np->imask-1)) {
|
||
printf ("%s: please configure intr mask %x.\n",
|
||
ncr_name (np), np->imask);
|
||
} else {
|
||
printf ("%s: please configure intr %d.\n",
|
||
ncr_name (np), ffs (np->imask)-1);
|
||
};
|
||
np->mcount++;
|
||
};
|
||
#endif
|
||
};
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** ncr chip exception handler.
|
||
**
|
||
**
|
||
**==========================================================
|
||
**
|
||
** @RECOVER@ this function is not yet complete.
|
||
**
|
||
** there should be better ways to handle
|
||
** unexpected exceptions than to restart the
|
||
** script processor.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
void ncr_exception (ncb_p np)
|
||
{
|
||
u_char istat, dstat;
|
||
u_short sist;
|
||
u_long dsp;
|
||
|
||
/*
|
||
** interrupt on the fly ?
|
||
*/
|
||
while ((istat = INB (nc_istat)) & INTF) {
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("F");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
OUTB (nc_istat, INTF);
|
||
np->profile.num_fly++;
|
||
ncr_wakeup (np, 0);
|
||
};
|
||
|
||
if (!(istat & (SIP|DIP))) return;
|
||
|
||
/*
|
||
** Steinbach's Guideline for Systems Programming:
|
||
** Never test for an error condition you don't know how to handle.
|
||
*/
|
||
|
||
dstat = INB (nc_dstat);
|
||
sist = INW (nc_sist) ;
|
||
np->profile.num_int++;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY)
|
||
printf ("<%d|%x:%x|%x:%x>",
|
||
INB(nc_scr0),
|
||
dstat,sist,
|
||
INL(nc_dsp),INL(nc_dbc));
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
if ((dstat==DFE) && (sist==PAR)) return;
|
||
|
||
/*==========================================================
|
||
**
|
||
** First the normal cases.
|
||
**
|
||
**==========================================================
|
||
*/
|
||
/*-------------------------------------------
|
||
** SCSI reset
|
||
**-------------------------------------------
|
||
*/
|
||
|
||
if (sist & RST) {
|
||
ncr_init (np, "scsi reset", HS_RESET);
|
||
return;
|
||
};
|
||
|
||
/*-------------------------------------------
|
||
** selection timeout
|
||
**
|
||
** IID excluded from dstat mask!
|
||
** (chip bug)
|
||
**-------------------------------------------
|
||
*/
|
||
|
||
if ((sist & STO) &&
|
||
!(sist & (GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
||
!(dstat & (MDPE|BF|ABRT|SIR))) {
|
||
ncr_int_sto (np);
|
||
return;
|
||
};
|
||
|
||
/*-------------------------------------------
|
||
** Phase mismatch.
|
||
**-------------------------------------------
|
||
*/
|
||
|
||
if ((sist & MA) &&
|
||
!(sist & (STO|GEN|HTH|SGE|UDC|RST|PAR)) &&
|
||
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
|
||
ncr_int_ma (np);
|
||
return;
|
||
};
|
||
|
||
/*-------------------------------------------
|
||
** Programmed interrupt
|
||
**-------------------------------------------
|
||
*/
|
||
|
||
if ((dstat & SIR) &&
|
||
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
||
!(dstat & (MDPE|BF|ABRT|IID)) &&
|
||
(INB(nc_dsps) <= 8)) {
|
||
ncr_int_sir (np);
|
||
return;
|
||
};
|
||
|
||
/*========================================
|
||
** do the register dump
|
||
**========================================
|
||
*/
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (!(ncr_debug & DEBUG_NODUMP)) /* @DEBUG@ */
|
||
#endif
|
||
if (time.tv_sec - np->regtime.tv_sec>10) {
|
||
int i;
|
||
np->regtime = time;
|
||
for (i=0; i<sizeof(np->regdump); i++)
|
||
((char*)&np->regdump)[i] = ((char*)np->reg)[i];
|
||
np->regdump.nc_dstat = dstat;
|
||
np->regdump.nc_sist = sist;
|
||
};
|
||
|
||
printf ("%s targ %d?: ERROR (%x:%x:%x) (%x/%x) @ (%x:%x).\n",
|
||
ncr_name (np), INB (nc_ctest0)&7, dstat, sist,
|
||
INB (nc_sbcl),
|
||
INB (nc_sxfer),INB (nc_scr3),
|
||
dsp = INL (nc_dsp), INL (nc_dbc));
|
||
|
||
/*----------------------------------------
|
||
** clean up the dma fifo
|
||
**----------------------------------------
|
||
*/
|
||
|
||
if ((INB(nc_sstat0)&(ILF|ORF|OLF)) ||
|
||
(INB(nc_sstat1)&0xf0) || !(dstat & DFE)) {
|
||
printf ("%s: have to clear fifos.\n", ncr_name (np));
|
||
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
|
||
OUTB (nc_ctest3, CLF); /* clear dma fifo */
|
||
}
|
||
|
||
/*----------------------------------------
|
||
** unexpected disconnect
|
||
**----------------------------------------
|
||
*/
|
||
|
||
if ((sist & UDC) &&
|
||
!(sist & (STO|GEN|HTH|MA|SGE|RST|PAR)) &&
|
||
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
|
||
OUTB (nc_scr0, HS_UNEXPECTED);
|
||
OUTL (nc_dsp, vtophys(&np->script->cleanup));
|
||
return;
|
||
};
|
||
|
||
/*----------------------------------------
|
||
** cannot disconnect
|
||
**----------------------------------------
|
||
*/
|
||
|
||
if ((dstat & IID) &&
|
||
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
||
!(dstat & (MDPE|BF|ABRT|SIR)) &&
|
||
((INL(nc_dbc) & 0xf8000000) == 0x18000000)) {
|
||
/*
|
||
** Data cycles while waiting for disconnect.
|
||
** Force disconnect.
|
||
*/
|
||
OUTB (nc_scntl1, 0);
|
||
/*
|
||
** System may hang, but timeout will handle that.
|
||
** In fact, timeout can handle ALL problems :-)
|
||
*/
|
||
OUTB (nc_dcntl, (STD|NOCOM));
|
||
return;
|
||
};
|
||
|
||
/*----------------------------------------
|
||
** single step
|
||
**----------------------------------------
|
||
*/
|
||
|
||
if ((dstat & SSI) &&
|
||
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
||
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
|
||
OUTB (nc_dcntl, (STD|NOCOM));
|
||
return;
|
||
};
|
||
|
||
/*
|
||
** @RECOVER@ HTH, SGE, ABRT.
|
||
**
|
||
** We should try to recover from these interrupts.
|
||
** They may occur if there are problems with synch transfers,
|
||
** or if targets are powerswitched while the driver is running.
|
||
*/
|
||
|
||
if (sist & SGE) {
|
||
OUTB (nc_ctest3, CLF); /* clear scsi offsets */
|
||
}
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
/*
|
||
** Freeze controller to be able to read the messages.
|
||
*/
|
||
|
||
if (ncr_debug & DEBUG_FREEZE) {
|
||
int i;
|
||
unsigned char val;
|
||
for (i=0; i<0x60; i++) {
|
||
switch (i%16) {
|
||
|
||
case 0:
|
||
printf ("%s: reg[%d0]: ",
|
||
ncr_name(np),i/16);
|
||
break;
|
||
case 4:
|
||
case 8:
|
||
case 12:
|
||
printf (" ");
|
||
break;
|
||
};
|
||
val = ((unsigned char*) np->vaddr) [i];
|
||
printf (" %x%x", val/16, val%16);
|
||
if (i%16==15) printf (".\n");
|
||
};
|
||
|
||
untimeout (TIMEOUT ncr_timeout, (caddr_t) np);
|
||
|
||
printf ("%s: halted!\n", ncr_name(np));
|
||
/*
|
||
** don't restart controller ...
|
||
*/
|
||
OUTB (nc_istat, SRST);
|
||
return;
|
||
};
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** sorry, have to kill ALL jobs ...
|
||
*/
|
||
|
||
ncr_init (np, "fatal error", HS_FAIL);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
** ncr chip exception handler for selection timeout
|
||
**
|
||
**==========================================================
|
||
**
|
||
** There seems to be a bug in the 53c810.
|
||
** Although a STO-Interupt is pending,
|
||
** it continues executing script commands.
|
||
** But it will fail and interrupt (IID) on
|
||
** the next instruction where it's looking
|
||
** for a valid phase.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
void ncr_int_sto (ncb_p np)
|
||
{
|
||
u_long dsa, scratcha, diff;
|
||
ccb_p cp;
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("T");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** look for ccb and set the status.
|
||
*/
|
||
|
||
dsa = INL (nc_dsa);
|
||
cp = &np->ccb;
|
||
while (cp && (vtophys(&cp->phys) != dsa))
|
||
cp = cp->link_ccb;
|
||
|
||
if (cp) {
|
||
cp-> host_status = HS_SEL_TIMEOUT;
|
||
ncr_complete (np, cp);
|
||
};
|
||
|
||
/*
|
||
** repair start queue
|
||
*/
|
||
|
||
scratcha = INL (nc_scratcha);
|
||
diff = scratcha - vtophys(&np->script->tryloop);
|
||
|
||
assert ((diff <= MAX_START * 20) && !(diff % 20));
|
||
|
||
if ((diff <= MAX_START * 20) && !(diff % 20)) {
|
||
np->script->startpos[0] = scratcha;
|
||
OUTL (nc_dsp, vtophys (&np->script->start));
|
||
return;
|
||
};
|
||
ncr_init (np, "selection timeout", HS_FAIL);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** ncr chip exception handler for phase errors.
|
||
**
|
||
**
|
||
**==========================================================
|
||
**
|
||
** We have to construct a new transfer descriptor,
|
||
** to transfer the rest of the current block.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
static void ncr_int_ma (ncb_p np)
|
||
{
|
||
u_long dbc;
|
||
u_long rest;
|
||
u_long dsa;
|
||
u_long dsp;
|
||
u_long nxtdsp;
|
||
u_long *vdsp;
|
||
u_long oadr;
|
||
u_long olen;
|
||
u_long *tblp;
|
||
u_long *newcmd;
|
||
u_char cmd;
|
||
u_char sbcl;
|
||
u_char delta;
|
||
u_char ss0;
|
||
ccb_p cp;
|
||
|
||
dsp = INL (nc_dsp);
|
||
dsa = INL (nc_dsa);
|
||
dbc = INL (nc_dbc);
|
||
ss0 = INB (nc_sstat0);
|
||
sbcl= INB (nc_sbcl);
|
||
|
||
cmd = dbc >> 24;
|
||
rest= dbc & 0xffffff;
|
||
delta=(INB (nc_dfifo) - rest) & 0x7f;
|
||
|
||
/*
|
||
** The data in the dma fifo has not been transfered to
|
||
** the target -> add the amount to the rest
|
||
** and clear the data.
|
||
*/
|
||
|
||
if (! (INB(nc_dstat) & DFE)) rest += delta;
|
||
if (ss0 & OLF) rest++;
|
||
if (ss0 & ORF) rest++;
|
||
|
||
OUTB (nc_ctest3, CLF ); /* clear dma fifo */
|
||
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
|
||
|
||
/*
|
||
** verify cp
|
||
*/
|
||
dsa = INL (nc_dsa);
|
||
cp = &np->ccb;
|
||
while (cp && (vtophys(&cp->phys) != dsa))
|
||
cp = cp->link_ccb;
|
||
|
||
assert (cp == np->header.cp);
|
||
assert (cp);
|
||
if (!cp)
|
||
return;
|
||
|
||
/*
|
||
** find the interrupted script command,
|
||
** and the address at where to continue.
|
||
*/
|
||
|
||
if (dsp == vtophys (&cp->patch[2])) {
|
||
vdsp = &cp->patch[0];
|
||
nxtdsp = vdsp[3];
|
||
} else if (dsp == vtophys (&cp->patch[6])) {
|
||
vdsp = &cp->patch[4];
|
||
nxtdsp = vdsp[3];
|
||
} else {
|
||
vdsp = (u_long*) ((char*)np->script - vtophys(np->script) + dsp -8);
|
||
nxtdsp = dsp;
|
||
};
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
/*
|
||
** log the information
|
||
*/
|
||
if (ncr_debug & (DEBUG_TINY|DEBUG_PHASE)) {
|
||
printf ("P%d%d ",cmd&7, sbcl&7);
|
||
printf ("RL=%d D=%d SS0=%x ",rest,delta,ss0);
|
||
};
|
||
if (ncr_debug & DEBUG_PHASE) {
|
||
printf ("\nCP=%x CP2=%x DSP=%x NXT=%x VDSP=%x CMD=%x ",
|
||
cp, np->header.cp, dsp, nxtdsp, vdsp, cmd);
|
||
};
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** get old startaddress and old length.
|
||
*/
|
||
|
||
oadr = vdsp[1];
|
||
|
||
if (cmd & 0x10) { /* Table indirect */
|
||
tblp = (u_long*) ((char*) &cp->phys + oadr);
|
||
olen = tblp[0];
|
||
oadr = tblp[1];
|
||
} else {
|
||
tblp = (u_long*) 0;
|
||
olen = vdsp[0] & 0xffffff;
|
||
};
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_PHASE) {
|
||
printf ("OCMD=%x\nTBLP=%x OLEN=%x OADR=%x\n",
|
||
vdsp[0] >> 24, tblp, olen, oadr);
|
||
};
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** if old phase not dataphase, leave here.
|
||
*/
|
||
|
||
assert (cmd == (vdsp[0] >> 24));
|
||
if (cmd & 0x06) {
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("phase change %d-%d %d@%x resid=%d.\n",
|
||
cmd&7, sbcl&7, olen, oadr, rest);
|
||
|
||
OUTB (nc_dcntl, (STD|NOCOM));
|
||
return;
|
||
};
|
||
|
||
/*
|
||
** choose the correct patch area.
|
||
** if savep points to one, choose the other.
|
||
*/
|
||
|
||
newcmd = cp->patch;
|
||
if (cp->phys.header.savep == vtophys (newcmd)) newcmd+=4;
|
||
|
||
/*
|
||
** fillin the commands
|
||
*/
|
||
|
||
newcmd[0] = ((cmd & 0x0f) << 24) | rest;
|
||
newcmd[1] = oadr + olen - rest;
|
||
newcmd[2] = SCR_JUMP;
|
||
newcmd[3] = nxtdsp;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_PHASE) {
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("newcmd[%d] %x %x %x %x.\n",
|
||
newcmd - cp->patch,
|
||
newcmd[0], newcmd[1], newcmd[2], newcmd[3]);
|
||
}
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
/*
|
||
** fake the return address (to the patch).
|
||
** and restart script processor at dispatcher.
|
||
*/
|
||
np->profile.num_break++;
|
||
OUTL (nc_temp, vtophys (newcmd));
|
||
OUTL (nc_dsp, vtophys (&np->script->dispatch));
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** ncr chip exception handler for programmed interrupts.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static void ncr_show_msg (u_char * msg)
|
||
{
|
||
u_char i;
|
||
printf ("%x",*msg);
|
||
if (*msg==M_EXTENDED) {
|
||
for (i=1;i<8;i++) {
|
||
if (i-1>msg[1]) break;
|
||
printf ("-%x",msg[i]);
|
||
};
|
||
} else if ((*msg & 0xf0) == 0x20) {
|
||
printf ("-%x",msg[1]);
|
||
}
|
||
}
|
||
|
||
void ncr_int_sir (ncb_p np)
|
||
{
|
||
u_char chg, ofs, per, fak;
|
||
u_char num = INB (nc_dsps);
|
||
ccb_p cp=0;
|
||
tcb_p tp;
|
||
u_long dsa;
|
||
u_char target = INB (nc_ctest0) & 7;
|
||
int i;
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TINY) printf ("I#%d", num);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
switch (num) {
|
||
case 2:
|
||
case 3:
|
||
case 4:
|
||
case 5:
|
||
case 6:
|
||
case 8:
|
||
/*
|
||
** lookup the ccb
|
||
*/
|
||
dsa = INL (nc_dsa);
|
||
cp = &np->ccb;
|
||
while (cp && (vtophys(&cp->phys) != dsa))
|
||
cp = cp->link_ccb;
|
||
|
||
assert (cp == np->header.cp);
|
||
assert (cp);
|
||
if (!cp)
|
||
goto out;
|
||
}
|
||
|
||
switch (num) {
|
||
|
||
/*--------------------------------------------------------------------
|
||
**
|
||
** Processing of interrupted getcc selects
|
||
**
|
||
**--------------------------------------------------------------------
|
||
*/
|
||
|
||
case 1: /*------------------------------------------
|
||
** Script processor is idle.
|
||
** Look for interrupted "check cond"
|
||
**------------------------------------------
|
||
*/
|
||
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART)
|
||
printf ("%s: int#%d",ncr_name (np),num);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
cp = (ccb_p) 0;
|
||
for (i=0; i<MAX_TARGET; i++) {
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART) printf (" t%d", i);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
tp = &np->target[i];
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART) printf ("+");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
cp = tp->hold_cp;
|
||
if (!cp) continue;
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART) printf ("+");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
if ((cp->host_status==HS_BUSY) &&
|
||
(cp->scsi_status==S_CHECK_COND) &&
|
||
(cp->scs2_status==S_ILLEGAL))
|
||
break;
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART) printf ("- (remove)");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
tp->hold_cp = cp = (ccb_p) 0;
|
||
};
|
||
|
||
if (cp) {
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART)
|
||
printf ("+ restart job ..\n");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
OUTL (nc_dsa, vtophys (&cp->phys));
|
||
OUTL (nc_dsp, vtophys (&np->script->getcc));
|
||
return;
|
||
};
|
||
|
||
/*
|
||
** no job, resume normal processing
|
||
*/
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART) printf (" -- remove trap\n");
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
np->script->start0[0] = SCR_INT ^ IFFALSE (0);
|
||
break;
|
||
|
||
|
||
case 2: /*-------------------------------------------
|
||
** While trying to reselect for
|
||
** getting the condition code,
|
||
** a target reselected us.
|
||
**-------------------------------------------
|
||
*/
|
||
PRINT_ADDR(cp->xfer);
|
||
#ifdef NCR_DEBUG
|
||
if (ncr_debug & DEBUG_RESTART)
|
||
printf ("in getcc reselect by t%d.\n",
|
||
INB(nc_ssid)&7);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** Mark this job
|
||
*/
|
||
cp->host_status = HS_BUSY;
|
||
cp->scsi_status = S_CHECK_COND;
|
||
cp->scs2_status = S_ILLEGAL;
|
||
np->target[cp->xfer->TARGET].hold_cp = cp;
|
||
|
||
/*
|
||
** And patch code to restart it.
|
||
*/
|
||
np->script->start0[0] = SCR_INT;
|
||
break;
|
||
|
||
/*--------------------------------------------------------------------
|
||
**
|
||
** Negotiation of synch mode.
|
||
**
|
||
** Possible cases: int msg_in[0] sxfer send goto
|
||
** We try try to negotiate:
|
||
** -> target doesnt't msgin (3) noop ASYNC - -
|
||
** -> target rejected our msg (3) reject ASYNC - -
|
||
** -> target answered (ok) (3) sdtr set - clrack
|
||
** -> target answered (!ok) (3) sdtr ASYNC REJ--->msg_bad
|
||
** -> any other msgin -
|
||
**
|
||
** Target tries to negotiate:
|
||
** -> incoming message (4) sdtr set SDTR -
|
||
** We sent our answer:
|
||
** -> target doesn't msgout (4) reject* ASYNC - -
|
||
** -> target rejected our msg (4) reject ASYNC - -
|
||
** -> target negotiates again (4) sdtr set SDTR -
|
||
**
|
||
**--------------------------------------------------------------------
|
||
*/
|
||
case 3:
|
||
case 4:
|
||
/*
|
||
** @CHECKOUT@
|
||
*/
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_SDTR) {
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("sync msgin: ");
|
||
ncr_show_msg (np->msgin);
|
||
printf (".\n");
|
||
};
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
tp = &np->target[target];
|
||
|
||
/*
|
||
** any error in negotiation:
|
||
** fall back to asynch.
|
||
*/
|
||
|
||
if ((np->msgin[0]!=M_EXTENDED) ||
|
||
(np->msgin[1]!=3) ||
|
||
(np->msgin[2]!=M_X_SDTR)) {
|
||
np->msgin [0] = M_NOOP;
|
||
ncr_setsync (np, cp, 0xe0);
|
||
break;
|
||
}
|
||
|
||
per = np->msgin[3];
|
||
ofs = np->msgin[4];
|
||
|
||
/*
|
||
** if target sends SDTR message,
|
||
** it CAN transfer synch.
|
||
*/
|
||
|
||
if (ofs)
|
||
tp->inqdata[7] |= INQ7_SYNC;
|
||
|
||
/*------------------------------------------------
|
||
** do actual computation.
|
||
**------------------------------------------------
|
||
*/
|
||
chg = 0;
|
||
|
||
if (ofs==0) per=255;
|
||
if (per < np->ns_sync) {chg = 1; per = np->ns_sync;}
|
||
if (per < tp->minsync)
|
||
{chg = 1; per = tp->minsync;}
|
||
if (ofs > tp->maxoffs)
|
||
{chg = 1; ofs = 8;}
|
||
fak = (4ul * per - 1) / np->ns_sync - 3;
|
||
|
||
if (ofs && (fak>7)) {chg = 1; ofs = 0;}
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_SDTR) {
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("sync: per=%d ofs=%d fak=%d chg=%d.\n",
|
||
per, ofs, fak, chg);
|
||
}
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** if the answer had bad values,
|
||
** we will use asynch mode.
|
||
*/
|
||
|
||
if ((num == 3) && chg) ofs = 0;
|
||
if (!ofs) fak=7;
|
||
|
||
/*
|
||
** Set synchronous mode now.
|
||
*/
|
||
ncr_setsync (np, cp, (fak<<5)|ofs);
|
||
|
||
if (num == 3) {
|
||
if (chg) OUTL (nc_dsp,vtophys (&np->script->msg_bad));
|
||
else OUTL (nc_dsp,vtophys (&np->script->clrack));
|
||
return;
|
||
};
|
||
|
||
/*------------------------------------------------
|
||
** prepare an answer message
|
||
**------------------------------------------------
|
||
*/
|
||
|
||
np->msgout[0] = M_EXTENDED;
|
||
np->msgout[1] = 3;
|
||
np->msgout[2] = M_X_SDTR;
|
||
np->msgout[3] = per;
|
||
np->msgout[4] = ofs;
|
||
|
||
np->msgin [0] = M_NOOP;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_SDTR) {
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("sync msgout: ");
|
||
ncr_show_msg (np->msgin);
|
||
printf (".\n");
|
||
}
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
break;
|
||
|
||
|
||
/*--------------------------------------------------------------------
|
||
**
|
||
** Processing of special messages
|
||
**
|
||
**--------------------------------------------------------------------
|
||
*/
|
||
|
||
case 5: /*
|
||
** We received a M_REJECT message.
|
||
*/
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("M_REJECT received (%x:%x).\n",
|
||
np->lastmsg, np->msgout[0]);
|
||
break;
|
||
|
||
case 6: /*
|
||
** We received an unknown message
|
||
*/
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("M_REJECT sent for ");
|
||
ncr_show_msg (np->msgin);
|
||
printf (".\n");
|
||
break;
|
||
|
||
/*--------------------------------------------------------------------
|
||
**
|
||
** Processing of a "S_QUEUE_FULL" status.
|
||
**
|
||
** The current command has been rejected.
|
||
** We have started too many commands for that target.
|
||
**
|
||
** If possible, reinsert at head of queue.
|
||
** Stall queue until there are no disconnected jobs
|
||
** (ncr REALLY idle). Then restart processing.
|
||
**
|
||
**--------------------------------------------------------------------
|
||
*/
|
||
case 8: /*
|
||
** Stall the start queue.
|
||
*/
|
||
PRINT_ADDR(cp->xfer);
|
||
printf ("queue full.\n");
|
||
|
||
np->script->start1[0] = SCR_INT;
|
||
|
||
/*
|
||
** Try to disable tagged transfers.
|
||
*/
|
||
ncr_setmaxtags (&np->target[target], 0);
|
||
|
||
/*
|
||
** @QUEUE@ reinsert current job in queue.
|
||
*/
|
||
|
||
/* fall through */
|
||
|
||
case 7: /*
|
||
** Look for a disconnected job.
|
||
*/
|
||
cp = &np->ccb;
|
||
while (cp && cp->host_status != HS_DISCONNECT)
|
||
cp = cp->link_ccb;
|
||
|
||
/*
|
||
** if there is one, ...
|
||
*/
|
||
if (cp) {
|
||
/*
|
||
** wait for reselection
|
||
*/
|
||
OUTL (nc_dsp, vtophys (&np->script->reselect));
|
||
return;
|
||
};
|
||
|
||
/*
|
||
** else remove the interrupt.
|
||
*/
|
||
|
||
printf ("%s: queue empty.\n", ncr_name (np));
|
||
np->script->start1[0] = SCR_INT ^ IFFALSE (0);
|
||
break;
|
||
|
||
};
|
||
|
||
out:
|
||
OUTB (nc_dcntl, (STD|NOCOM));
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Aquire a control block
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static ccb_p ncr_get_ccb
|
||
(ncb_p np, u_long flags, u_long target, u_long lun)
|
||
{
|
||
lcb_p lp;
|
||
ccb_p cp = (ccb_p ) 0;
|
||
|
||
/*
|
||
** Lun structure available ?
|
||
*/
|
||
|
||
lp = np->target[target].lp[lun];
|
||
if (lp)
|
||
cp = lp->next_ccb;
|
||
|
||
/*
|
||
** Look for free CCB
|
||
*/
|
||
|
||
while (cp && cp->magic) cp = cp->next_ccb;
|
||
|
||
/*
|
||
** if nothing available, take the default.
|
||
*/
|
||
|
||
if (!cp) cp = &np->ccb;
|
||
|
||
/*
|
||
** Wait until available.
|
||
*/
|
||
|
||
while (cp->magic) {
|
||
if (flags & SCSI_NOSLEEP) break;
|
||
if (tsleep ((caddr_t)cp, PZERO|PCATCH, "ncr", 0))
|
||
break;
|
||
};
|
||
|
||
if (cp->magic)
|
||
return ((ccb_p) 0);
|
||
|
||
cp->magic = 1;
|
||
return (cp);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Release one control block
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
void ncr_free_ccb (ncb_p np, ccb_p cp, int flags)
|
||
{
|
||
/*
|
||
** sanity
|
||
*/
|
||
|
||
if (!cp) return;
|
||
|
||
cp -> host_status = HS_IDLE;
|
||
cp -> magic = 0;
|
||
if (cp == &np->ccb)
|
||
wakeup ((caddr_t) cp);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Allocation of resources for Targets/Luns/Tags.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static void ncr_alloc_ccb (ncb_p np, struct scsi_xfer * xp)
|
||
{
|
||
tcb_p tp;
|
||
lcb_p lp;
|
||
ccb_p cp;
|
||
|
||
u_long target;
|
||
u_long lun;
|
||
|
||
if (!np) return;
|
||
if (!xp) return;
|
||
|
||
target = xp->TARGET;
|
||
lun = xp->LUN;
|
||
|
||
if (target>=MAX_TARGET) return;
|
||
if (lun >=MAX_LUN ) return;
|
||
|
||
/*
|
||
** target control block ?
|
||
*/
|
||
tp=&np->target[target];
|
||
|
||
if (!tp->jump_tcb.l_cmd) {
|
||
|
||
/*
|
||
** initialize it.
|
||
*/
|
||
tp->jump_tcb.l_cmd = (SCR_JUMP^IFFALSE (DATA (0x80 + target)));
|
||
tp->jump_tcb.l_paddr = np->jump_tcb.l_paddr;
|
||
|
||
tp->getscr[0] = SCR_COPY (1);
|
||
tp->getscr[1] = vtophys (&tp->sval);
|
||
tp->getscr[2] = np->paddr + offsetof (struct ncr_reg, nc_sxfer);
|
||
|
||
assert (( (offsetof(struct ncr_reg, nc_sxfer) ^
|
||
offsetof(struct tcb , sval )) &3) == 0);
|
||
|
||
tp->call_lun.l_cmd = (SCR_CALL);
|
||
tp->call_lun.l_paddr = vtophys (&np->script->resel_lun);
|
||
|
||
tp->jump_lcb.l_cmd = (SCR_JUMP);
|
||
tp->jump_lcb.l_paddr = vtophys (&np->script->abort);
|
||
|
||
np->jump_tcb.l_paddr = vtophys (&tp->jump_tcb);
|
||
}
|
||
|
||
/*
|
||
** Logic unit control block
|
||
*/
|
||
lp = tp->lp[lun];
|
||
if (!lp) {
|
||
/*
|
||
** Allocate a lcb
|
||
*/
|
||
lp = (lcb_p) malloc (sizeof (struct lcb), M_DEVBUF, M_NOWAIT);
|
||
if (!lp) return;
|
||
|
||
/*
|
||
** Initialize it
|
||
*/
|
||
bzero (lp, sizeof (*lp));
|
||
lp->jump_lcb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (lun)));
|
||
lp->jump_lcb.l_paddr = tp->jump_lcb.l_paddr;
|
||
|
||
lp->call_tag.l_cmd = (SCR_CALL);
|
||
lp->call_tag.l_paddr = vtophys (&np->script->resel_tag);
|
||
|
||
lp->jump_ccb.l_cmd = (SCR_JUMP);
|
||
lp->jump_ccb.l_paddr = vtophys (&np->script->aborttag);
|
||
|
||
lp->actlink = 1;
|
||
/*
|
||
** Link into Lun-Chain
|
||
*/
|
||
|
||
tp->jump_lcb.l_paddr = vtophys (&lp->jump_lcb);
|
||
tp->lp[lun] = lp;
|
||
|
||
}
|
||
|
||
/*
|
||
** Limit possible number of ccbs.
|
||
**
|
||
** If tagged command queueing is enabled,
|
||
** can use more than one ccb.
|
||
*/
|
||
|
||
if (np->actccbs >= MAX_START-2) return;
|
||
if (lp->actccbs && (lp->actccbs >= lp->reqccbs))
|
||
return;
|
||
|
||
/*
|
||
** Allocate a ccb
|
||
*/
|
||
cp = (ccb_p) malloc (sizeof (struct ccb), M_DEVBUF, M_NOWAIT);
|
||
|
||
if (!cp)
|
||
return;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_ALLOC) {
|
||
PRINT_ADDR(xp);
|
||
printf ("new ccb @%x.\n", cp);
|
||
}
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** Count it
|
||
*/
|
||
lp->actccbs++;
|
||
np->actccbs++;
|
||
|
||
/*
|
||
** Initialize it.
|
||
*/
|
||
bzero (cp, sizeof (*cp));
|
||
|
||
/*
|
||
** link in reselect chain.
|
||
*/
|
||
cp->jump_ccb.l_cmd = SCR_JUMP;
|
||
cp->jump_ccb.l_paddr = lp->jump_ccb.l_paddr;
|
||
lp->jump_ccb.l_paddr = vtophys(&cp->jump_ccb);
|
||
cp->call_tmp.l_cmd = SCR_CALL;
|
||
cp->call_tmp.l_paddr = vtophys(&np->script->resel_tmp);
|
||
|
||
/*
|
||
** link in wakeup chain
|
||
*/
|
||
cp->link_ccb = np->ccb.link_ccb;
|
||
np->ccb.link_ccb = cp;
|
||
|
||
/*
|
||
** Link into CCB-Chain
|
||
*/
|
||
cp->next_ccb = lp->next_ccb;
|
||
lp->next_ccb = cp;
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Announce the number of ccbs/tags to the scsi driver.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
static void ncr_opennings (ncb_p np, lcb_p lp, struct scsi_xfer * xp)
|
||
{
|
||
#ifndef ANCIENT
|
||
/*
|
||
** want to reduce the number ...
|
||
*/
|
||
if (lp->actlink > lp->reqlink) {
|
||
|
||
/*
|
||
** Try to reduce the count.
|
||
** We assume to run at splbio ..
|
||
*/
|
||
u_char diff = lp->actlink - lp->reqlink;
|
||
|
||
if (!diff) return;
|
||
|
||
if (diff > xp->sc_link->opennings)
|
||
diff = xp->sc_link->opennings;
|
||
|
||
/*
|
||
** reduce it.
|
||
*/
|
||
|
||
xp->sc_link->opennings -= diff;
|
||
lp->actlink -= diff;
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TAGS)
|
||
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
|
||
ncr_name(np), diff, lp->actlink, lp->reqlink);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
return;
|
||
};
|
||
|
||
/*
|
||
** want to increase the number ?
|
||
*/
|
||
if (lp->reqlink > lp->actlink) {
|
||
u_char diff = lp->reqlink - lp->actlink;
|
||
|
||
xp->sc_link->opennings += diff;
|
||
lp->actlink += diff;
|
||
wakeup ((caddr_t) xp->sc_link);
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TAGS)
|
||
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
|
||
ncr_name(np), diff, lp->actlink, lp->reqlink);
|
||
#endif
|
||
};
|
||
#endif
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Build Scatter Gather Block
|
||
**
|
||
**
|
||
**==========================================================
|
||
**
|
||
** The transfer area may be scattered among
|
||
** several non adjacent physical pages.
|
||
**
|
||
** We may use MAX_SCATTER blocks.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
static u_long ncr_scatter
|
||
(struct dsb* phys, vm_offset_t vaddr, vm_size_t datalen)
|
||
{
|
||
u_long paddr, pnext;
|
||
|
||
u_short segment = 0;
|
||
u_long segsize, segaddr;
|
||
u_long size, csize = 0;
|
||
u_long chunk = MAX_SIZE;
|
||
int free;
|
||
|
||
bzero (&phys->data, sizeof (phys->data));
|
||
if (!datalen) return (0);
|
||
|
||
paddr = vtophys (vaddr);
|
||
|
||
/*
|
||
** insert extra break points at a distance of chunk.
|
||
** We try to reduce the number of interrupts due to
|
||
** unexpected phase changes due to disconnects.
|
||
** A typical harddisk may disconnect before ANY block.
|
||
** If we want to avoid unexpected phase changes at all
|
||
** we have to use a break point every 512 bytes.
|
||
** Of course the number of scatter/gather blocks is
|
||
** limited.
|
||
*/
|
||
|
||
free = MAX_SCATTER - 1;
|
||
|
||
if (vaddr & (NBPG-1)) free -= datalen / NBPG;
|
||
|
||
if (free>1)
|
||
while ((chunk * free >= 2 * datalen) && (chunk>=1024))
|
||
chunk /= 2;
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if(ncr_debug & DEBUG_SCATTER)
|
||
printf("ncr?:\tscattering virtual=0x%x size=%d chunk=%d.\n",
|
||
(u_long) vaddr, (u_long) datalen, chunk);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
/*
|
||
** Build data descriptors.
|
||
*/
|
||
while (datalen && (segment < MAX_SCATTER)) {
|
||
|
||
/*
|
||
** this segment is empty
|
||
*/
|
||
segsize = 0;
|
||
segaddr = paddr;
|
||
pnext = paddr;
|
||
|
||
if (!csize) csize = chunk;
|
||
|
||
while ((datalen) && (paddr == pnext) && (csize)) {
|
||
|
||
/*
|
||
** continue this segment
|
||
*/
|
||
pnext = (paddr & (~(NBPG - 1))) + NBPG;
|
||
|
||
/*
|
||
** Compute max size
|
||
*/
|
||
|
||
size = pnext - paddr; /* page size */
|
||
if (size > datalen) size = datalen; /* data size */
|
||
if (size > csize ) size = csize ; /* chunksize */
|
||
|
||
segsize += size;
|
||
vaddr += size;
|
||
csize -= size;
|
||
datalen -= size;
|
||
paddr = vtophys (vaddr);
|
||
};
|
||
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if(ncr_debug & DEBUG_SCATTER)
|
||
printf ("\tseg #%d addr=%x size=%d (rest=%d).\n",
|
||
segment, segaddr, segsize, datalen);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
|
||
phys->data[segment].addr = segaddr;
|
||
phys->data[segment].size = segsize;
|
||
segment++;
|
||
}
|
||
|
||
if (datalen)
|
||
printf("ncr?: scatter/gather failed (residue=%d).\n",
|
||
datalen);
|
||
|
||
return (datalen);
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Profiling the drivers and targets performance.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
/*
|
||
** Compute the difference in milliseconds.
|
||
**/
|
||
|
||
static int ncr_delta (struct timeval * from, struct timeval * to)
|
||
{
|
||
if (!from->tv_sec) return (-1);
|
||
if (!to ->tv_sec) return (-2);
|
||
return ( (to->tv_sec - from->tv_sec - 2)*1000+
|
||
+(to->tv_usec - from->tv_usec + 2000000)/1000);
|
||
}
|
||
|
||
#define PROFILE cp->phys.header.stamp
|
||
static void ncb_profile (ncb_p np, ccb_p cp)
|
||
{
|
||
int co, da, st, en, di, se, post,work,disc;
|
||
u_long diff;
|
||
|
||
PROFILE.end = time;
|
||
|
||
st = ncr_delta (&PROFILE.start,&PROFILE.status);
|
||
if (st<0) return; /* status not reached */
|
||
|
||
da = ncr_delta (&PROFILE.start,&PROFILE.data);
|
||
if (da<0) return; /* No data transfer phase */
|
||
|
||
co = ncr_delta (&PROFILE.start,&PROFILE.command);
|
||
if (co<0) return; /* command not executed */
|
||
|
||
en = ncr_delta (&PROFILE.start,&PROFILE.end),
|
||
di = ncr_delta (&PROFILE.start,&PROFILE.disconnect),
|
||
se = ncr_delta (&PROFILE.start,&PROFILE.select);
|
||
post = en - st;
|
||
|
||
/*
|
||
** @PROFILE@ Disconnect time invalid if multiple disconnects
|
||
*/
|
||
|
||
if (di>=0) disc = se-di; else disc = 0;
|
||
|
||
work = (st - co) - disc;
|
||
|
||
diff = (np->disc_phys - np->disc_ref) & 0xff;
|
||
np->disc_ref += diff;
|
||
|
||
np->profile.num_trans += 1;
|
||
if (cp->xfer)
|
||
np->profile.num_bytes += cp->xfer->datalen;
|
||
np->profile.num_disc += diff;
|
||
np->profile.ms_setup += co;
|
||
np->profile.ms_data += work;
|
||
np->profile.ms_disc += disc;
|
||
np->profile.ms_post += post;
|
||
}
|
||
#undef PROFILE
|
||
|
||
/*==========================================================
|
||
**
|
||
**
|
||
** Device lookup.
|
||
**
|
||
**
|
||
**==========================================================
|
||
*/
|
||
|
||
struct table_entry {
|
||
char * manufacturer;
|
||
char * model;
|
||
char * version;
|
||
u_long info;
|
||
};
|
||
|
||
static struct table_entry device_tab[] =
|
||
{
|
||
{"WangDAT", "Model 2600", "01.7", CR_NOMSG},
|
||
{"WangDAT", "Model 3200", "02.2", CR_NOMSG},
|
||
{"", "", "", 0} /* catch all: must be last entry. */
|
||
};
|
||
|
||
static u_long ncr_lookup(char * id)
|
||
{
|
||
struct table_entry * p = device_tab;
|
||
char *d, *r, c;
|
||
|
||
for (;;p++) {
|
||
|
||
d = id+8;
|
||
r = p->manufacturer;
|
||
while (c=*r++) if (c!=*d++) break;
|
||
if (c) continue;
|
||
|
||
d = id+16;
|
||
r = p->model;
|
||
while (c=*r++) if (c!=*d++) break;
|
||
if (c) continue;
|
||
|
||
d = id+32;
|
||
r = p->version;
|
||
while (c=*r++) if (c!=*d++) break;
|
||
if (c) continue;
|
||
|
||
return (p->info);
|
||
}
|
||
}
|
||
|
||
/*==========================================================
|
||
**
|
||
** Determine the ncr's clock frequency.
|
||
** This is important for the negotiation
|
||
** of the synchronous transfer rate.
|
||
**
|
||
**==========================================================
|
||
**
|
||
** Note: we have to return the correct value.
|
||
** THERE IS NO SAVE DEFAULT VALUE.
|
||
**
|
||
** We assume that all NCR based boards are delivered
|
||
** with a 40Mhz clock. Because we have to divide
|
||
** by an integer value greater than 3, only clock
|
||
** frequencies of 40Mhz (/4) or 50MHz (/5) permit
|
||
** the FAST-SCSI rate of 10MHz.
|
||
**
|
||
**----------------------------------------------------------
|
||
*/
|
||
|
||
#ifndef NCR_CLOCK
|
||
# define NCR_CLOCK 40
|
||
#endif /* NCR_CLOCK */
|
||
|
||
|
||
static void ncr_getclock (ncb_p np)
|
||
{
|
||
u_char tbl[5] = {6,2,3,4,6};
|
||
u_char f;
|
||
u_char ns_clock = (1000/NCR_CLOCK);
|
||
|
||
/*
|
||
** Compute the best value for scntl3.
|
||
*/
|
||
|
||
f = (2 * MIN_SYNC_PD - 1) / ns_clock;
|
||
if (!f ) f=1;
|
||
if (f>4) f=4;
|
||
np -> ns_sync = (ns_clock * tbl[f]) / 2;
|
||
np -> rv_scntl3 = f<<4;
|
||
|
||
f = (2 * MIN_ASYNC_PD - 1) / ns_clock;
|
||
if (!f ) f=1;
|
||
if (f>4) f=4;
|
||
np -> ns_async = (ns_clock * tbl[f]) / 2;
|
||
np -> rv_scntl3 |= f;
|
||
#ifdef SCSI_NCR_DEBUG
|
||
if (ncr_debug & DEBUG_TIMING)
|
||
printf ("%s: sclk=%d async=%d sync=%d (ns) scntl3=0x%x\n",
|
||
ncr_name (np), ns_clock, np->ns_async, np->ns_sync, np->rv_scntl3);
|
||
#endif /* SCSI_NCR_DEBUG */
|
||
}
|
||
|
||
/*=========================================================================*/
|
||
#endif /* KERNEL */
|