7627 lines
164 KiB
C
7627 lines
164 KiB
C
/**************************************************************************
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**
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** $Id: ncr.c,v 1.116 1998/03/30 09:55:09 phk Exp $
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**
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** Device driver for the NCR 53C810 PCI-SCSI-Controller.
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**
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** FreeBSD / NetBSD
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**
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**-------------------------------------------------------------------------
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**
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** Written for 386bsd and FreeBSD by
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** Wolfgang Stanglmeier <wolf@cologne.de>
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** Stefan Esser <se@mi.Uni-Koeln.de>
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**
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** Ported to NetBSD by
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** Charles M. Hannum <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
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** modification, are permitted provided that the following conditions
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** are met:
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. 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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#define NCR_DATE "pl24 96/12/14"
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#define NCR_VERSION (2)
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#define MAX_UNITS (16)
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#define NCR_GETCC_WITHMSG
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#if defined (__FreeBSD__) && defined(KERNEL)
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#include "opt_failsafe.h"
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#include "opt_ncr.h"
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#endif /* defined (__FreeBSD__) && defined(KERNEL) */
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#ifdef FAILSAFE
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#ifndef SCSI_NCR_DFLT_TAGS
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#define SCSI_NCR_DFLT_TAGS (0)
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#endif /* SCSI_NCR_DFLT_TAGS */
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#define CDROM_ASYNC
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#endif /* FAILSAFE */
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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 <arch/conf/xxxx>
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**
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**==========================================================
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*/
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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 default synchronous period factor
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** (0=asynchronous)
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** If maximum synchronous frequency is defined, use it instead.
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*/
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#ifndef SCSI_NCR_MAX_SYNC
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#ifndef SCSI_NCR_DFLT_SYNC
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#define SCSI_NCR_DFLT_SYNC (12)
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#endif /* SCSI_NCR_DFLT_SYNC */
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#else
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#if SCSI_NCR_MAX_SYNC == 0
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#define SCSI_NCR_DFLT_SYNC 0
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#else
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#define SCSI_NCR_DFLT_SYNC (250000 / SCSI_NCR_MAX_SYNC)
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#endif
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#endif
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/*
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** The minimal asynchronous pre-scaler period (ns)
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** Shall be 40.
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*/
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#ifndef SCSI_NCR_MIN_ASYNC
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#define SCSI_NCR_MIN_ASYNC (40)
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#endif /* SCSI_NCR_MIN_ASYNC */
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/*
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** The maximal bus with (in log2 byte)
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** (0=8 bit, 1=16 bit)
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*/
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#ifndef SCSI_NCR_MAX_WIDE
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#define SCSI_NCR_MAX_WIDE (1)
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#endif /* SCSI_NCR_MAX_WIDE */
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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_DFLT_TAGS
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#define SCSI_NCR_DFLT_TAGS (4)
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#endif /* SCSI_NCR_DFLT_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 (16)
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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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#ifndef MAX_LUN
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#define MAX_LUN (8)
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#endif /* MAX_LUN */
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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 in use.
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** The calculation below is actually quite silly ...
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*/
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#define MAX_START (32) /* (MAX_TARGET + 7 * SCSI_NCR_DFLT_TAGS) */
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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) * PAGE_SIZE.
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*/
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#define MAX_SIZE ((MAX_SCATTER-1) * (long) PAGE_SIZE)
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/*
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** other
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*/
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#define NCR_SNOOP_TIMEOUT (1000000)
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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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#ifdef __NetBSD__
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#ifdef _KERNEL
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#define KERNEL
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#endif
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#endif
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#include <stddef.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 __NetBSD__
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#define bootverbose 1
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#endif
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#include <sys/sysctl.h>
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#ifndef __NetBSD__
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#include <machine/clock.h>
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#endif
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_extern.h>
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#endif /* KERNEL */
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#ifndef __NetBSD__
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#include <pci/pcivar.h>
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#include <pci/pcireg.h>
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#include <pci/ncrreg.h>
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#else
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#include <sys/device.h>
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#include <dev/pci/ncr_reg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#define DELAY(x) delay(x)
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#endif /* __NetBSD */
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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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#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_NEGO (0x0200)
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#define DEBUG_TAGS (0x0400)
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#define DEBUG_FREEZE (0x0800)
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#define DEBUG_RESTART (0x1000)
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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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#ifdef SCSI_NCR_DEBUG
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#define DEBUG_FLAGS ncr_debug
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#else /* SCSI_NCR_DEBUG */
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#define SCSI_NCR_DEBUG 0
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#define DEBUG_FLAGS 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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#ifdef NCR_IOMAPPED
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#define INB(r) inb (np->port + offsetof(struct ncr_reg, r))
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#define INW(r) inw (np->port + offsetof(struct ncr_reg, r))
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#define INL(r) inl (np->port + offsetof(struct ncr_reg, r))
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#define OUTB(r, val) outb (np->port+offsetof(struct ncr_reg,r),(val))
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#define OUTW(r, val) outw (np->port+offsetof(struct ncr_reg,r),(val))
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#define OUTL(r, val) outl (np->port+offsetof(struct ncr_reg,r),(val))
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#define INB_OFF(o) inb (np->port + (o))
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#define INW_OFF(o) inw (np->port + (o))
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#define INL_OFF(o) inl (np->port + (o))
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#else
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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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#define INB_OFF(o) *( ((u_char *) np->reg) + (o) )
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#define INW_OFF(o) *((u_short *) ( ((u_char *) np->reg) + (o)) )
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#define INL_OFF(o) *((u_int32_t *) ( ((u_char *) np->reg) + (o)) )
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#endif
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/*
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** Set bit field ON, OFF
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*/
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#define OUTONB(r, m) OUTB(r, INB(r) | (m))
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#define OUTOFFB(r, m) OUTB(r, INB(r) & ~(m))
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#define OUTONW(r, m) OUTW(r, INW(r) | (m))
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#define OUTOFFW(r, m) OUTW(r, INW(r) & ~(m))
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#define OUTONL(r, m) OUTL(r, INL(r) | (m))
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#define OUTOFFL(r, m) OUTL(r, INL(r) & ~(m))
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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/wide 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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#define HS_DONEMASK (0xfc)
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/*==========================================================
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**
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** Software Interrupt Codes
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**
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**==========================================================
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*/
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#define SIR_SENSE_RESTART (1)
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#define SIR_SENSE_FAILED (2)
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#define SIR_STALL_RESTART (3)
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#define SIR_STALL_QUEUE (4)
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#define SIR_NEGO_SYNC (5)
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#define SIR_NEGO_WIDE (6)
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#define SIR_NEGO_FAILED (7)
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#define SIR_NEGO_PROTO (8)
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#define SIR_REJECT_RECEIVED (9)
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#define SIR_REJECT_SENT (10)
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#define SIR_IGN_RESIDUE (11)
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#define SIR_MISSING_SAVE (12)
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#define SIR_MAX (12)
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/*==========================================================
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**
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** Extended error codes.
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** xerr_status field of struct ccb.
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**
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**==========================================================
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*/
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#define XE_OK (0)
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#define XE_EXTRA_DATA (1) /* unexpected data phase */
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#define XE_BAD_PHASE (2) /* illegal phase (4/5) */
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/*==========================================================
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**
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** Negotiation status.
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** nego_status field of struct ccb.
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**
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**==========================================================
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*/
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#define NS_SYNC (1)
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#define NS_WIDE (2)
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/*==========================================================
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**
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** "Special features" of targets.
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** quirks field of struct tcb.
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** actualquirks field of struct ccb.
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**
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**==========================================================
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*/
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#define QUIRK_AUTOSAVE (0x01)
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#define QUIRK_NOMSG (0x02)
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#define QUIRK_NOSYNC (0x10)
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#define QUIRK_NOWIDE16 (0x20)
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#define QUIRK_NOTAGS (0x40)
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#define QUIRK_UPDATE (0x80)
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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_QUEUE (0x02)
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#define INQ7_SYNC (0x10)
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#define INQ7_WIDE16 (0x20)
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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 CCB_MAGIC (0xf2691ad2)
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#define MAX_TAGS (16) /* hard limit */
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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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#define PRINT_ADDR(xp) sc_print_addr(xp->sc_link)
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/*==========================================================
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**
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** Declaration of structs.
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**
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**==========================================================
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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;
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struct link {
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ncrcmd l_cmd;
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ncrcmd l_paddr;
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};
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struct usrcmd {
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u_long target;
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u_long lun;
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u_long data;
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u_long cmd;
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};
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|
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#define UC_SETSYNC 10
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#define UC_SETTAGS 11
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#define UC_SETDEBUG 12
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#define UC_SETORDER 13
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#define UC_SETWIDE 14
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#define UC_SETFLAG 15
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|
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#define UF_TRACE (0x01)
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|
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/*---------------------------------------
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**
|
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** Timestamps for profiling
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**
|
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**---------------------------------------
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*/
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struct tstamp {
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int start;
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int end;
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int select;
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int command;
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int data;
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int status;
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int disconnect;
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int reselect;
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};
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|
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/*
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** profiling data (per device)
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|
*/
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|
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struct profile {
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u_long num_trans;
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u_long num_bytes;
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u_long num_disc;
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u_long num_break;
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u_long num_int;
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u_long num_fly;
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u_long ms_setup;
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u_long ms_data;
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u_long ms_disc;
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u_long ms_post;
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};
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|
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/*==========================================================
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**
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** Declaration of structs: target control block
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**
|
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**==========================================================
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*/
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struct tcb {
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/*
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** during reselection the ncr jumps to this point
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** with SFBR set to the encoded target number
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** with bit 7 set.
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** if it's not this target, jump to the next.
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**
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** JUMP IF (SFBR != #target#)
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** @(next tcb)
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|
*/
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|
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struct link jump_tcb;
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|
|
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/*
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** load the actual values for the sxfer and the scntl3
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** register (sync/wide mode).
|
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**
|
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** SCR_COPY (1);
|
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** @(sval field of this tcb)
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** @(sxfer register)
|
|
** SCR_COPY (1);
|
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** @(wval field of this tcb)
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** @(scntl3 register)
|
|
*/
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|
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ncrcmd getscr[6];
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|
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/*
|
|
** 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;
|
|
|
|
/*
|
|
** pointer to ccb used for negotiating.
|
|
** Avoid to start a nego for all queued commands
|
|
** when tagged command queuing is enabled.
|
|
*/
|
|
|
|
ccb_p nego_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;
|
|
|
|
/*
|
|
** negotiation of wide and synch transfer.
|
|
** device quirks.
|
|
*/
|
|
|
|
/*0*/ u_char minsync;
|
|
/*1*/ u_char sval;
|
|
/*2*/ u_short period;
|
|
/*0*/ u_char maxoffs;
|
|
|
|
/*1*/ u_char quirks;
|
|
|
|
/*2*/ u_char widedone;
|
|
/*3*/ u_char wval;
|
|
/*
|
|
** 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.
|
|
** The goalpointer points after
|
|
** the last transfer command.
|
|
*/
|
|
|
|
u_int32_t savep;
|
|
u_int32_t lastp;
|
|
u_int32_t goalp;
|
|
|
|
/*
|
|
** 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];
|
|
};
|
|
|
|
/*
|
|
** The status bytes are used by the host and the script processor.
|
|
**
|
|
** The first four byte are copied to the scratchb register
|
|
** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
|
|
** and copied back just after disconnecting.
|
|
** Inside the script the XX_REG are used.
|
|
**
|
|
** The last four bytes are used inside the script by "COPY" commands.
|
|
** Because source and destination must have the same alignment
|
|
** in a longword, the fields HAVE to be at the choosen offsets.
|
|
** xerr_st (4) 0 (0x34) scratcha
|
|
** sync_st (5) 1 (0x05) sxfer
|
|
** wide_st (7) 3 (0x03) scntl3
|
|
*/
|
|
|
|
/*
|
|
** First four bytes (script)
|
|
*/
|
|
#define QU_REG scr0
|
|
#define HS_REG scr1
|
|
#define HS_PRT nc_scr1
|
|
#define SS_REG scr2
|
|
#define PS_REG scr3
|
|
|
|
/*
|
|
** First four bytes (host)
|
|
*/
|
|
#define actualquirks phys.header.status[0]
|
|
#define host_status phys.header.status[1]
|
|
#define scsi_status phys.header.status[2]
|
|
#define parity_status phys.header.status[3]
|
|
|
|
/*
|
|
** Last four bytes (script)
|
|
*/
|
|
#define xerr_st header.status[4] /* MUST be ==0 mod 4 */
|
|
#define sync_st header.status[5] /* MUST be ==1 mod 4 */
|
|
#define nego_st header.status[6]
|
|
#define wide_st header.status[7] /* MUST be ==3 mod 4 */
|
|
|
|
/*
|
|
** Last four bytes (host)
|
|
*/
|
|
#define xerr_status phys.xerr_st
|
|
#define sync_status phys.sync_st
|
|
#define nego_status phys.nego_st
|
|
#define wide_status phys.wide_st
|
|
|
|
/*==========================================================
|
|
**
|
|
** 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 scmd ;
|
|
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 {
|
|
/*
|
|
** This filler ensures that the global header is
|
|
** cache line size aligned.
|
|
*/
|
|
ncrcmd filler[4];
|
|
|
|
/*
|
|
** 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.
|
|
*/
|
|
|
|
ncrcmd patch[8];
|
|
|
|
/*
|
|
** The general SCSI driver provides a
|
|
** pointer to a control block.
|
|
*/
|
|
|
|
struct scsi_xfer *xfer;
|
|
|
|
/*
|
|
** 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.
|
|
** While negotiating sync or wide transfer,
|
|
** a SDTM or WDTM message is appended.
|
|
*/
|
|
|
|
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;
|
|
|
|
/*
|
|
** Physical address of this instance of ccb
|
|
*/
|
|
|
|
u_long p_ccb;
|
|
|
|
/*
|
|
** Completion time out for this job.
|
|
** It's set to time of start + allowed number of seconds.
|
|
*/
|
|
|
|
u_long tlimit;
|
|
|
|
/*
|
|
** All ccbs of one hostadapter are chained.
|
|
*/
|
|
|
|
ccb_p link_ccb;
|
|
|
|
/*
|
|
** All ccbs of one target/lun are chained.
|
|
*/
|
|
|
|
ccb_p next_ccb;
|
|
|
|
/*
|
|
** Sense command
|
|
*/
|
|
|
|
u_char sensecmd[6];
|
|
|
|
/*
|
|
** 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;
|
|
};
|
|
|
|
#define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
|
|
|
|
/*==========================================================
|
|
**
|
|
** Declaration of structs: NCR device descriptor
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
struct ncb {
|
|
/*
|
|
** The global header.
|
|
** Accessible to both the host and the
|
|
** script-processor.
|
|
** We assume it is cache line size aligned.
|
|
*/
|
|
struct head header;
|
|
|
|
#ifdef __NetBSD__
|
|
struct device sc_dev;
|
|
void *sc_ih;
|
|
#else /* !__NetBSD__ */
|
|
int unit;
|
|
#endif /* __NetBSD__ */
|
|
|
|
/*-----------------------------------------------
|
|
** 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;
|
|
|
|
vm_offset_t vaddr2;
|
|
vm_offset_t paddr2;
|
|
|
|
/*
|
|
** pointer to the chip's registers.
|
|
*/
|
|
volatile
|
|
struct ncr_reg* reg;
|
|
|
|
/*
|
|
** Scripts instance virtual address.
|
|
*/
|
|
struct script *script;
|
|
struct scripth *scripth;
|
|
|
|
/*
|
|
** Scripts instance physical address.
|
|
*/
|
|
u_long p_script;
|
|
u_long p_scripth;
|
|
|
|
/*
|
|
** The SCSI address of the host adapter.
|
|
*/
|
|
u_char myaddr;
|
|
|
|
/*
|
|
** timing parameters
|
|
*/
|
|
u_char minsync; /* Minimum sync period factor */
|
|
u_char maxsync; /* Maximum sync period factor */
|
|
u_char maxoffs; /* Max scsi offset */
|
|
u_char clock_divn; /* Number of clock divisors */
|
|
u_long clock_khz; /* SCSI clock frequency in KHz */
|
|
u_long features; /* Chip features map */
|
|
u_char multiplier; /* Clock multiplier (1,2,4) */
|
|
|
|
u_char maxburst; /* log base 2 of dwords burst */
|
|
|
|
/*
|
|
** BIOS supplied PCI bus options
|
|
*/
|
|
u_char rv_scntl3;
|
|
u_char rv_dcntl;
|
|
u_char rv_dmode;
|
|
u_char rv_ctest3;
|
|
u_char rv_ctest4;
|
|
u_char rv_ctest5;
|
|
u_char rv_gpcntl;
|
|
u_char rv_stest2;
|
|
|
|
/*-----------------------------------------------
|
|
** Link to the generic SCSI driver
|
|
**-----------------------------------------------
|
|
*/
|
|
|
|
struct scsi_link sc_link;
|
|
|
|
/*-----------------------------------------------
|
|
** Job control
|
|
**-----------------------------------------------
|
|
**
|
|
** Commands from user
|
|
*/
|
|
struct usrcmd user;
|
|
u_char order;
|
|
|
|
/*
|
|
** Target data
|
|
*/
|
|
struct tcb target[MAX_TARGET];
|
|
|
|
/*
|
|
** Start queue.
|
|
*/
|
|
u_int32_t squeue [MAX_START];
|
|
u_short squeueput;
|
|
u_short actccbs;
|
|
|
|
/*
|
|
** Timeout handler
|
|
*/
|
|
u_long heartbeat;
|
|
u_short ticks;
|
|
u_short latetime;
|
|
u_long lasttime;
|
|
struct callout_handle timeout_ch;
|
|
|
|
/*-----------------------------------------------
|
|
** 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;
|
|
|
|
/*
|
|
** The global control block.
|
|
** It's used only during the configuration phase.
|
|
** A target control block will be created
|
|
** after the first successful transfer.
|
|
** It is allocated separately in order to insure
|
|
** cache line size alignment.
|
|
*/
|
|
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_int32_t lastmsg;
|
|
|
|
/*
|
|
** Buffer for STATUS_IN phase.
|
|
*/
|
|
u_char scratch;
|
|
|
|
/*
|
|
** controller chip dependent maximal transfer width.
|
|
*/
|
|
u_char maxwide;
|
|
|
|
/*
|
|
** option for M_IDENTIFY message: enables disconnecting
|
|
*/
|
|
u_char disc;
|
|
|
|
#ifdef NCR_IOMAPPED
|
|
/*
|
|
** address of the ncr control registers in io space
|
|
*/
|
|
u_short port;
|
|
#endif
|
|
};
|
|
|
|
#define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
|
|
#define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** 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!
|
|
**
|
|
**----------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
** Script fragments which are loaded into the on-board RAM
|
|
** of 825A, 875 and 895 chips.
|
|
*/
|
|
struct script {
|
|
ncrcmd start [ 7];
|
|
ncrcmd start0 [ 2];
|
|
ncrcmd start1 [ 3];
|
|
ncrcmd startpos [ 1];
|
|
ncrcmd trysel [ 8];
|
|
ncrcmd skip [ 8];
|
|
ncrcmd skip2 [ 3];
|
|
ncrcmd idle [ 2];
|
|
ncrcmd select [ 22];
|
|
ncrcmd prepare [ 4];
|
|
ncrcmd loadpos [ 14];
|
|
ncrcmd prepare2 [ 24];
|
|
ncrcmd setmsg [ 5];
|
|
ncrcmd clrack [ 2];
|
|
ncrcmd dispatch [ 33];
|
|
ncrcmd no_data [ 17];
|
|
ncrcmd checkatn [ 10];
|
|
ncrcmd command [ 15];
|
|
ncrcmd status [ 27];
|
|
ncrcmd msg_in [ 26];
|
|
ncrcmd msg_bad [ 6];
|
|
ncrcmd complete [ 13];
|
|
ncrcmd cleanup [ 12];
|
|
ncrcmd cleanup0 [ 11];
|
|
ncrcmd signal [ 10];
|
|
ncrcmd save_dp [ 5];
|
|
ncrcmd restore_dp [ 5];
|
|
ncrcmd disconnect [ 12];
|
|
ncrcmd disconnect0 [ 5];
|
|
ncrcmd disconnect1 [ 23];
|
|
ncrcmd msg_out [ 9];
|
|
ncrcmd msg_out_done [ 7];
|
|
ncrcmd badgetcc [ 6];
|
|
ncrcmd reselect [ 8];
|
|
ncrcmd reselect1 [ 8];
|
|
ncrcmd reselect2 [ 8];
|
|
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];
|
|
};
|
|
|
|
/*
|
|
** Script fragments which stay in main memory for all chips.
|
|
*/
|
|
struct scripth {
|
|
ncrcmd tryloop [MAX_START*5+2];
|
|
ncrcmd msg_parity [ 6];
|
|
ncrcmd msg_reject [ 8];
|
|
ncrcmd msg_ign_residue [ 32];
|
|
ncrcmd msg_extended [ 18];
|
|
ncrcmd msg_ext_2 [ 18];
|
|
ncrcmd msg_wdtr [ 27];
|
|
ncrcmd msg_ext_3 [ 18];
|
|
ncrcmd msg_sdtr [ 27];
|
|
ncrcmd msg_out_abort [ 10];
|
|
ncrcmd getcc [ 4];
|
|
ncrcmd getcc1 [ 5];
|
|
#ifdef NCR_GETCC_WITHMSG
|
|
ncrcmd getcc2 [ 33];
|
|
#else
|
|
ncrcmd getcc2 [ 14];
|
|
#endif
|
|
ncrcmd getcc3 [ 10];
|
|
ncrcmd aborttag [ 4];
|
|
ncrcmd abort [ 22];
|
|
ncrcmd snooptest [ 9];
|
|
ncrcmd snoopend [ 2];
|
|
};
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Function headers.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
#ifdef KERNEL
|
|
static void ncr_alloc_ccb (ncb_p np, u_long target, u_long lun);
|
|
static void ncr_complete (ncb_p np, ccb_p cp);
|
|
static int ncr_delta (int * from, int * to);
|
|
static void ncr_exception (ncb_p np);
|
|
static void ncr_free_ccb (ncb_p np, ccb_p cp, int flags);
|
|
static void ncr_selectclock (ncb_p np, u_char scntl3);
|
|
static void ncr_getclock (ncb_p np, u_char multiplier);
|
|
static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long t,u_long l);
|
|
static u_int32_t ncr_info (int unit);
|
|
static void ncr_init (ncb_p np, char * msg, u_long code);
|
|
static void ncr_intr (void *vnp);
|
|
static void ncr_int_ma (ncb_p np, u_char dstat);
|
|
static void ncr_int_sir (ncb_p np);
|
|
static void ncr_int_sto (ncb_p np);
|
|
static void ncr_min_phys (struct buf *bp);
|
|
static void ncr_negotiate (struct ncb* np, struct tcb* tp);
|
|
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
|
|
(ncb_p np, ncrcmd *src, ncrcmd *dst, int len);
|
|
static void ncr_script_fill (struct script * scr, struct scripth *scrh);
|
|
static int ncr_scatter (struct dsb* phys, vm_offset_t vaddr,
|
|
vm_size_t datalen);
|
|
static void ncr_setmaxtags (tcb_p tp, u_long usrtags);
|
|
static void ncr_getsync (ncb_p np, u_char sfac, u_char *fakp,
|
|
u_char *scntl3p);
|
|
static void ncr_setsync (ncb_p np, ccb_p cp,u_char scntl3,u_char sxfer);
|
|
static void ncr_settags (tcb_p tp, lcb_p lp, u_long usrtags);
|
|
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack);
|
|
static int ncr_show_msg (u_char * msg);
|
|
static int ncr_snooptest (ncb_p np);
|
|
static int32_t ncr_start (struct scsi_xfer *xp);
|
|
static void ncr_timeout (void *arg);
|
|
static void ncr_usercmd (ncb_p np);
|
|
static void ncr_wakeup (ncb_p np, u_long code);
|
|
|
|
#ifdef __NetBSD__
|
|
static int ncr_probe (struct device *, void *, void *);
|
|
static void ncr_attach (struct device *, struct device *, void *);
|
|
#else /* !__NetBSD */
|
|
static char* ncr_probe (pcici_t tag, pcidi_t type);
|
|
static void ncr_attach (pcici_t tag, int unit);
|
|
#endif /* __NetBSD__ */
|
|
|
|
#endif /* KERNEL */
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Global static data.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
|
|
static char ident[] =
|
|
"\n$Id: ncr.c,v 1.116 1998/03/30 09:55:09 phk Exp $\n";
|
|
|
|
static const u_long ncr_version = NCR_VERSION * 11
|
|
+ (u_long) sizeof (struct ncb) * 7
|
|
+ (u_long) sizeof (struct ccb) * 5
|
|
+ (u_long) sizeof (struct lcb) * 3
|
|
+ (u_long) sizeof (struct tcb) * 2;
|
|
|
|
#ifdef KERNEL
|
|
static const int nncr=MAX_UNITS; /* XXX to be replaced by SYSCTL */
|
|
static ncb_p ncrp [MAX_UNITS]; /* XXX to be replaced by SYSCTL */
|
|
|
|
static int ncr_debug = SCSI_NCR_DEBUG;
|
|
SYSCTL_INT(_debug, OID_AUTO, ncr_debug, CTLFLAG_RW, &ncr_debug, 0, "");
|
|
|
|
static int ncr_cache; /* to be aligned _NOT_ static */
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Global static data: auto configure
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
#define NCR_810_ID (0x00011000ul)
|
|
#define NCR_815_ID (0x00041000ul)
|
|
#define NCR_820_ID (0x00021000ul)
|
|
#define NCR_825_ID (0x00031000ul)
|
|
#define NCR_860_ID (0x00061000ul)
|
|
#define NCR_875_ID (0x000f1000ul)
|
|
#define NCR_875_ID2 (0x008f1000ul)
|
|
#define NCR_885_ID (0x000d1000ul)
|
|
#define NCR_895_ID (0x000c1000ul)
|
|
#define NCR_896_ID (0x000b1000ul)
|
|
|
|
#ifdef __NetBSD__
|
|
|
|
struct cfdriver ncrcd = {
|
|
NULL, "ncr", ncr_probe, ncr_attach, DV_DISK, sizeof(struct ncb)
|
|
};
|
|
|
|
#else /* !__NetBSD__ */
|
|
|
|
static u_long ncr_count;
|
|
|
|
static struct pci_device ncr_device = {
|
|
"ncr",
|
|
ncr_probe,
|
|
ncr_attach,
|
|
&ncr_count,
|
|
NULL
|
|
};
|
|
|
|
DATA_SET (pcidevice_set, ncr_device);
|
|
|
|
#endif /* !__NetBSD__ */
|
|
|
|
static struct scsi_adapter ncr_switch =
|
|
{
|
|
ncr_start,
|
|
ncr_min_phys,
|
|
0,
|
|
0,
|
|
#ifndef __NetBSD__
|
|
ncr_info,
|
|
"ncr",
|
|
#endif /* !__NetBSD__ */
|
|
};
|
|
|
|
static 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 */
|
|
#ifndef __NetBSD__
|
|
"ncr",
|
|
#endif /* !__NetBSD__ */
|
|
};
|
|
|
|
#ifdef __NetBSD__
|
|
|
|
#define ncr_name(np) (np->sc_dev.dv_xname)
|
|
|
|
#else /* !__NetBSD__ */
|
|
|
|
static char *ncr_name (ncb_p np)
|
|
{
|
|
static char name[10];
|
|
sprintf(name, "ncr%d", np->unit);
|
|
return (name);
|
|
}
|
|
#endif
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** 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_KVAR 0x70000000
|
|
#define RELOC_LABELH 0x80000000
|
|
#define RELOC_MASK 0xf0000000
|
|
|
|
#define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
|
|
#define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
|
|
#define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
|
|
#define RADDR(label) (RELOC_REGISTER | REG(label))
|
|
#define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
|
|
#define KVAR(which) (RELOC_KVAR | (which))
|
|
|
|
#define KVAR_SECOND (0)
|
|
#define KVAR_TICKS (1)
|
|
#define KVAR_NCR_CACHE (2)
|
|
|
|
#define SCRIPT_KVAR_FIRST (0)
|
|
#define SCRIPT_KVAR_LAST (3)
|
|
|
|
/*
|
|
* Kernel variables referenced in the scripts.
|
|
* THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
|
|
*/
|
|
static void *script_kvars[] =
|
|
{ &time_second, &ticks, &ncr_cache };
|
|
|
|
static struct script script0 = {
|
|
/*--------------------------< START >-----------------------*/ {
|
|
/*
|
|
** Claim to be still alive ...
|
|
*/
|
|
SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)),
|
|
KVAR (KVAR_SECOND),
|
|
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),
|
|
SIR_SENSE_RESTART,
|
|
|
|
}/*-------------------------< START1 >----------------------*/,{
|
|
/*
|
|
** Hook for stalled start queue.
|
|
** Will be patched to IFTRUE by the interrupt handler.
|
|
*/
|
|
SCR_INT ^ IFFALSE (0),
|
|
SIR_STALL_RESTART,
|
|
/*
|
|
** Then jump to a certain point in tryloop.
|
|
** Due to the lack of indirect addressing the code
|
|
** is self modifying here.
|
|
*/
|
|
SCR_JUMP,
|
|
}/*-------------------------< STARTPOS >--------------------*/,{
|
|
PADDRH(tryloop),
|
|
|
|
}/*-------------------------< 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 for execution,
|
|
** 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_F (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 reader)
|
|
*/
|
|
|
|
SCR_CLR (SCR_TRG),
|
|
0,
|
|
SCR_LOAD_REG (HS_REG, 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_SYNC_REQ message)
|
|
*/
|
|
SCR_MOVE_TBL ^ SCR_MSG_OUT,
|
|
offsetof (struct dsb, smsg),
|
|
#ifdef undef /* XXX better fail than try to deal with this ... */
|
|
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
|
|
-16,
|
|
#endif
|
|
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_F (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)),
|
|
KVAR (KVAR_TICKS),
|
|
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),
|
|
|
|
}/*-------------------------< PREPARE2 >---------------------*/,{
|
|
/*
|
|
** Load the synchronous mode register
|
|
*/
|
|
SCR_COPY (1),
|
|
NADDR (sync_st),
|
|
RADDR (sxfer),
|
|
/*
|
|
** Load the wide mode and timing register
|
|
*/
|
|
SCR_COPY (1),
|
|
NADDR (wide_st),
|
|
RADDR (scntl3),
|
|
/*
|
|
** 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),
|
|
/*
|
|
** Message in phase ?
|
|
*/
|
|
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
|
PADDR (dispatch),
|
|
/*
|
|
** Extended or reject message ?
|
|
*/
|
|
SCR_FROM_REG (sbdl),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
|
|
PADDR (msg_in),
|
|
SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
|
|
PADDRH (msg_reject),
|
|
/*
|
|
** normal processing
|
|
*/
|
|
SCR_JUMP,
|
|
PADDR (dispatch),
|
|
}/*-------------------------< SETMSG >----------------------*/,{
|
|
SCR_COPY (1),
|
|
RADDR (scratcha),
|
|
NADDR (msgout),
|
|
SCR_SET (SCR_ATN),
|
|
0,
|
|
}/*-------------------------< CLRACK >----------------------*/,{
|
|
/*
|
|
** Terminate possible pending message phase.
|
|
*/
|
|
SCR_CLR (SCR_ACK),
|
|
0,
|
|
|
|
}/*-----------------------< DISPATCH >----------------------*/,{
|
|
SCR_FROM_REG (HS_REG),
|
|
0,
|
|
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
|
|
SIR_NEGO_FAILED,
|
|
/*
|
|
** remove bogus output signals
|
|
*/
|
|
SCR_REG_REG (socl, SCR_AND, CACK|CATN),
|
|
0,
|
|
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_LOAD_REG (scratcha, XE_BAD_PHASE),
|
|
0,
|
|
SCR_COPY (1),
|
|
RADDR (scratcha),
|
|
NADDR (xerr_st),
|
|
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.
|
|
** Remember that in extended error.
|
|
*/
|
|
SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
|
|
0,
|
|
SCR_COPY (1),
|
|
RADDR (scratcha),
|
|
NADDR (xerr_st),
|
|
/*
|
|
** 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_REG_REG (PS_REG, SCR_ADD, 1),
|
|
0,
|
|
/*
|
|
** 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 (SS_REG),
|
|
0,
|
|
/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (S_CHECK_COND)),
|
|
28,
|
|
/*
|
|
** ... set a timestamp ...
|
|
*/
|
|
SCR_COPY (sizeof (struct timeval)),
|
|
KVAR (KVAR_TICKS),
|
|
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_TBL ^ SCR_COMMAND,
|
|
offsetof (struct dsb, scmd),
|
|
SCR_JUMP,
|
|
PADDR (dispatch),
|
|
|
|
}/*-------------------------< STATUS >--------------------*/,{
|
|
/*
|
|
** set the timestamp.
|
|
*/
|
|
SCR_COPY (sizeof (struct timeval)),
|
|
KVAR (KVAR_TICKS),
|
|
NADDR (header.stamp.status),
|
|
/*
|
|
** If this is a GETCC transfer,
|
|
*/
|
|
SCR_FROM_REG (SS_REG),
|
|
0,
|
|
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (S_CHECK_COND)),
|
|
40,
|
|
/*
|
|
** get the status
|
|
*/
|
|
SCR_MOVE_ABS (1) ^ SCR_STATUS,
|
|
NADDR (scratch),
|
|
/*
|
|
** Save status to scsi_status.
|
|
** Mark as complete.
|
|
** And wait for disconnect.
|
|
*/
|
|
SCR_TO_REG (SS_REG),
|
|
0,
|
|
SCR_REG_REG (SS_REG, SCR_OR, S_SENSE),
|
|
0,
|
|
SCR_LOAD_REG (HS_REG, 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 (SS_REG),
|
|
0,
|
|
/*
|
|
** if it was no check condition ...
|
|
*/
|
|
SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
|
|
PADDR (checkatn),
|
|
/*
|
|
** ... mark as complete.
|
|
*/
|
|
SCR_LOAD_REG (HS_REG, 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)),
|
|
PADDRH (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)),
|
|
PADDRH (msg_extended),
|
|
SCR_JUMP ^ IFTRUE (DATA (M_NOOP)),
|
|
PADDR (clrack),
|
|
SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
|
|
PADDRH (msg_reject),
|
|
SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)),
|
|
PADDRH (msg_ign_residue),
|
|
/*
|
|
** Rest of the messages left as
|
|
** an exercise ...
|
|
**
|
|
** Unimplemented messages:
|
|
** fall through to MSG_BAD.
|
|
*/
|
|
}/*-------------------------< MSG_BAD >------------------*/,{
|
|
/*
|
|
** unimplemented message - reject it.
|
|
*/
|
|
SCR_INT,
|
|
SIR_REJECT_SENT,
|
|
SCR_LOAD_REG (scratcha, M_REJECT),
|
|
0,
|
|
SCR_JUMP,
|
|
PADDR (setmsg),
|
|
|
|
}/*-------------------------< COMPLETE >-----------------*/,{
|
|
/*
|
|
** Complete message.
|
|
**
|
|
** If it's not the get condition code,
|
|
** copy TEMP register to LASTP in header.
|
|
*/
|
|
SCR_FROM_REG (SS_REG),
|
|
0,
|
|
/*<<<*/ SCR_JUMPR ^ IFTRUE (MASK (S_SENSE, S_SENSE)),
|
|
12,
|
|
SCR_COPY (4),
|
|
RADDR (temp),
|
|
NADDR (header.lastp),
|
|
/*>>>*/ /*
|
|
** 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|SCR_ATN),
|
|
0,
|
|
/*
|
|
** ... and wait for the disconnect.
|
|
*/
|
|
SCR_WAIT_DISC,
|
|
0,
|
|
}/*-------------------------< CLEANUP >-------------------*/,{
|
|
/*
|
|
** dsa: Pointer to ccb
|
|
** or xxxxxxFF (no ccb)
|
|
**
|
|
** HS_REG: 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_F (4),
|
|
RADDR (dsa),
|
|
PADDR (cleanup0),
|
|
SCR_COPY (sizeof (struct head)),
|
|
NADDR (header),
|
|
}/*-------------------------< CLEANUP0 >--------------------*/,{
|
|
0,
|
|
|
|
/*
|
|
** If command resulted in "check condition"
|
|
** status and is not yet completed,
|
|
** try to get the condition code.
|
|
*/
|
|
SCR_FROM_REG (HS_REG),
|
|
0,
|
|
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
|
|
16,
|
|
SCR_FROM_REG (SS_REG),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
|
|
PADDRH(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 (SS_REG),
|
|
0,
|
|
SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
|
|
SIR_STALL_QUEUE,
|
|
/*
|
|
** if job completed ...
|
|
*/
|
|
SCR_FROM_REG (HS_REG),
|
|
0,
|
|
/*
|
|
** ... signal completion to the host
|
|
*/
|
|
SCR_INT_FLY ^ IFFALSE (MASK (0, HS_DONEMASK)),
|
|
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 >---------------*/,{
|
|
/*
|
|
** If QUIRK_AUTOSAVE is set,
|
|
** do an "save pointer" operation.
|
|
*/
|
|
SCR_FROM_REG (QU_REG),
|
|
0,
|
|
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)),
|
|
12,
|
|
/*
|
|
** like SAVE_DP message:
|
|
** Copy TEMP register to SAVEP in header.
|
|
*/
|
|
SCR_COPY (4),
|
|
RADDR (temp),
|
|
NADDR (header.savep),
|
|
/*>>>*/ /*
|
|
** Check if temp==savep or temp==goalp:
|
|
** if not, log a missing save pointer message.
|
|
** In fact, it's a comparison mod 256.
|
|
**
|
|
** Hmmm, I hadn't thought that I would be urged to
|
|
** write this kind of ugly self modifying code.
|
|
**
|
|
** It's unbelievable, but the ncr53c8xx isn't able
|
|
** to subtract one register from another.
|
|
*/
|
|
SCR_FROM_REG (temp),
|
|
0,
|
|
/*
|
|
** You are not expected to understand this ..
|
|
**
|
|
** CAUTION: only little endian architectures supported! XXX
|
|
*/
|
|
SCR_COPY_F (1),
|
|
NADDR (header.savep),
|
|
PADDR (disconnect0),
|
|
}/*-------------------------< DISCONNECT0 >--------------*/,{
|
|
/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (1)),
|
|
20,
|
|
/*
|
|
** neither this
|
|
*/
|
|
SCR_COPY_F (1),
|
|
NADDR (header.goalp),
|
|
PADDR (disconnect1),
|
|
}/*-------------------------< DISCONNECT1 >--------------*/,{
|
|
SCR_INT ^ IFFALSE (DATA (1)),
|
|
SIR_MISSING_SAVE,
|
|
/*>>>*/
|
|
|
|
/*
|
|
** DISCONNECTing ...
|
|
**
|
|
** disable the "unexpected disconnect" feature,
|
|
** and remove the ACK signal.
|
|
*/
|
|
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
|
|
0,
|
|
SCR_CLR (SCR_ACK|SCR_ATN),
|
|
0,
|
|
/*
|
|
** Wait for the disconnect.
|
|
*/
|
|
SCR_WAIT_DISC,
|
|
0,
|
|
/*
|
|
** Profiling:
|
|
** Set a time stamp,
|
|
** and count the disconnects.
|
|
*/
|
|
SCR_COPY (sizeof (struct timeval)),
|
|
KVAR (KVAR_TICKS),
|
|
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 (HS_REG, HS_DISCONNECT),
|
|
0,
|
|
SCR_JUMP,
|
|
PADDR (cleanup),
|
|
|
|
}/*-------------------------< MSG_OUT >-------------------*/,{
|
|
/*
|
|
** The target requests a message.
|
|
*/
|
|
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)),
|
|
PADDRH (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),
|
|
|
|
}/*------------------------< BADGETCC >---------------------*/,{
|
|
/*
|
|
** If SIGP was set, clear it and try again.
|
|
*/
|
|
SCR_FROM_REG (ctest2),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
|
|
PADDRH (getcc2),
|
|
SCR_INT,
|
|
SIR_SENSE_FAILED,
|
|
}/*-------------------------< RESELECT >--------------------*/,{
|
|
/*
|
|
** This NOP will be patched with LED OFF
|
|
** SCR_REG_REG (gpreg, SCR_OR, 0x01)
|
|
*/
|
|
SCR_NO_OP,
|
|
0,
|
|
|
|
/*
|
|
** 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),
|
|
}/*-------------------------< RESELECT1 >--------------------*/,{
|
|
/*
|
|
** This NOP will be patched with LED ON
|
|
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
|
|
*/
|
|
SCR_NO_OP,
|
|
0,
|
|
/*
|
|
** ... 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, 0x8F),
|
|
0,
|
|
SCR_TO_REG (ctest0),
|
|
0,
|
|
SCR_JUMP,
|
|
NADDR (jump_tcb),
|
|
}/*-------------------------< RESELECT2 >-------------------*/,{
|
|
/*
|
|
** This NOP will be patched with LED ON
|
|
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
|
|
*/
|
|
SCR_NO_OP,
|
|
0,
|
|
/*
|
|
** 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)),
|
|
** KVAR (KVAR_TICKS),
|
|
** 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_OUT)),
|
|
** PADDR (no_data),
|
|
** SCR_COPY (sizeof (struct timeval)),
|
|
** KVAR (KVAR_TICKS),
|
|
** 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
|
|
|
|
}/*--------------------------------------------------------*/
|
|
};
|
|
|
|
|
|
static struct scripth scripth0 = {
|
|
/*-------------------------< 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,
|
|
** PADDRH(tryloop),
|
|
**
|
|
**-----------------------------------------------------------
|
|
*/
|
|
0
|
|
}/*-------------------------< MSG_PARITY >---------------*/,{
|
|
/*
|
|
** count it
|
|
*/
|
|
SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
|
|
0,
|
|
/*
|
|
** send a "message parity error" message.
|
|
*/
|
|
SCR_LOAD_REG (scratcha, M_PARITY),
|
|
0,
|
|
SCR_JUMP,
|
|
PADDR (setmsg),
|
|
}/*-------------------------< MSG_REJECT >---------------*/,{
|
|
/*
|
|
** If a negotiation was in progress,
|
|
** negotiation failed.
|
|
*/
|
|
SCR_FROM_REG (HS_REG),
|
|
0,
|
|
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
|
|
SIR_NEGO_FAILED,
|
|
/*
|
|
** else make host log this message
|
|
*/
|
|
SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
|
|
SIR_REJECT_RECEIVED,
|
|
SCR_JUMP,
|
|
PADDR (clrack),
|
|
|
|
}/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
|
|
/*
|
|
** Terminate cycle
|
|
*/
|
|
SCR_CLR (SCR_ACK),
|
|
0,
|
|
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
|
PADDR (dispatch),
|
|
/*
|
|
** get residue size.
|
|
*/
|
|
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)),
|
|
PADDRH (msg_parity),
|
|
SCR_FROM_REG (scratcha),
|
|
0,
|
|
/*
|
|
** Size is 0 .. ignore message.
|
|
*/
|
|
SCR_JUMP ^ IFTRUE (DATA (0)),
|
|
PADDR (clrack),
|
|
/*
|
|
** Size is not 1 .. have to interrupt.
|
|
*/
|
|
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (1)),
|
|
40,
|
|
/*
|
|
** Check for residue byte in swide register
|
|
*/
|
|
SCR_FROM_REG (scntl2),
|
|
0,
|
|
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
|
|
16,
|
|
/*
|
|
** There IS data in the swide register.
|
|
** Discard it.
|
|
*/
|
|
SCR_REG_REG (scntl2, SCR_OR, WSR),
|
|
0,
|
|
SCR_JUMP,
|
|
PADDR (clrack),
|
|
/*
|
|
** Load again the size to the sfbr register.
|
|
*/
|
|
/*>>>*/ SCR_FROM_REG (scratcha),
|
|
0,
|
|
/*>>>*/ SCR_INT,
|
|
SIR_IGN_RESIDUE,
|
|
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)),
|
|
PADDRH (msg_parity),
|
|
SCR_FROM_REG (scratcha),
|
|
0,
|
|
/*
|
|
*/
|
|
SCR_JUMP ^ IFTRUE (DATA (3)),
|
|
PADDRH (msg_ext_3),
|
|
SCR_JUMP ^ IFFALSE (DATA (2)),
|
|
PADDR (msg_bad),
|
|
}/*-------------------------< MSG_EXT_2 >----------------*/,{
|
|
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)),
|
|
PADDRH (msg_parity),
|
|
SCR_FROM_REG (scratcha),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)),
|
|
PADDRH (msg_wdtr),
|
|
/*
|
|
** unknown extended message
|
|
*/
|
|
SCR_JUMP,
|
|
PADDR (msg_bad)
|
|
}/*-------------------------< MSG_WDTR >-----------------*/,{
|
|
SCR_CLR (SCR_ACK),
|
|
0,
|
|
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
|
|
PADDR (dispatch),
|
|
/*
|
|
** get data bus width
|
|
*/
|
|
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
|
|
NADDR (msgin[3]),
|
|
SCR_FROM_REG (socl),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
|
|
PADDRH (msg_parity),
|
|
/*
|
|
** let the host do the real work.
|
|
*/
|
|
SCR_INT,
|
|
SIR_NEGO_WIDE,
|
|
/*
|
|
** let the target fetch our answer.
|
|
*/
|
|
SCR_SET (SCR_ATN),
|
|
0,
|
|
SCR_CLR (SCR_ACK),
|
|
0,
|
|
|
|
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
|
|
SIR_NEGO_PROTO,
|
|
/*
|
|
** Send the M_X_WIDE_REQ
|
|
*/
|
|
SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
|
|
NADDR (msgout),
|
|
SCR_CLR (SCR_ATN),
|
|
0,
|
|
SCR_COPY (1),
|
|
RADDR (sfbr),
|
|
NADDR (lastmsg),
|
|
SCR_JUMP,
|
|
PADDR (msg_out_done),
|
|
|
|
}/*-------------------------< MSG_EXT_3 >----------------*/,{
|
|
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)),
|
|
PADDRH (msg_parity),
|
|
SCR_FROM_REG (scratcha),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)),
|
|
PADDRH (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)),
|
|
PADDRH (msg_parity),
|
|
/*
|
|
** let the host do the real work.
|
|
*/
|
|
SCR_INT,
|
|
SIR_NEGO_SYNC,
|
|
/*
|
|
** let the target fetch our answer.
|
|
*/
|
|
SCR_SET (SCR_ATN),
|
|
0,
|
|
SCR_CLR (SCR_ACK),
|
|
0,
|
|
|
|
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
|
|
SIR_NEGO_PROTO,
|
|
/*
|
|
** Send the M_X_SYNC_REQ
|
|
*/
|
|
SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
|
|
NADDR (msgout),
|
|
SCR_CLR (SCR_ATN),
|
|
0,
|
|
SCR_COPY (1),
|
|
RADDR (sfbr),
|
|
NADDR (lastmsg),
|
|
SCR_JUMP,
|
|
PADDR (msg_out_done),
|
|
|
|
}/*-------------------------< MSG_OUT_ABORT >-------------*/,{
|
|
/*
|
|
** After ABORT message,
|
|
**
|
|
** expect an immediate disconnect, ...
|
|
*/
|
|
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
|
|
0,
|
|
SCR_CLR (SCR_ACK|SCR_ATN),
|
|
0,
|
|
SCR_WAIT_DISC,
|
|
0,
|
|
/*
|
|
** ... and set the status to "ABORTED"
|
|
*/
|
|
SCR_LOAD_REG (HS_REG, 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_F (4),
|
|
RADDR (dsa),
|
|
PADDRH (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),
|
|
#ifdef NCR_GETCC_WITHMSG
|
|
/*
|
|
** If QUIRK_NOMSG is set, select without ATN.
|
|
** and don't send a message.
|
|
*/
|
|
SCR_FROM_REG (QU_REG),
|
|
0,
|
|
SCR_JUMP ^ IFTRUE (MASK (QUIRK_NOMSG, QUIRK_NOMSG)),
|
|
PADDRH(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 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),
|
|
SCR_JUMP,
|
|
PADDR (prepare2),
|
|
|
|
#endif
|
|
}/*-------------------------< 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_JUMP,
|
|
PADDR (prepare2),
|
|
}/*-------------------------< 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_CLR (SCR_ACK|SCR_ATN),
|
|
0,
|
|
SCR_WAIT_DISC,
|
|
0,
|
|
SCR_JUMP,
|
|
PADDR (start),
|
|
}/*-------------------------< SNOOPTEST >-------------------*/,{
|
|
/*
|
|
** Read the variable.
|
|
*/
|
|
SCR_COPY (4),
|
|
KVAR (KVAR_NCR_CACHE),
|
|
RADDR (scratcha),
|
|
/*
|
|
** Write the variable.
|
|
*/
|
|
SCR_COPY (4),
|
|
RADDR (temp),
|
|
KVAR (KVAR_NCR_CACHE),
|
|
/*
|
|
** Read back the variable.
|
|
*/
|
|
SCR_COPY (4),
|
|
KVAR (KVAR_NCR_CACHE),
|
|
RADDR (temp),
|
|
}/*-------------------------< SNOOPEND >-------------------*/,{
|
|
/*
|
|
** And stop.
|
|
*/
|
|
SCR_INT,
|
|
99,
|
|
}/*--------------------------------------------------------*/
|
|
};
|
|
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Fill in #define dependent parts of the script
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
void ncr_script_fill (struct script * scr, struct scripth * scrh)
|
|
{
|
|
int i;
|
|
ncrcmd *p;
|
|
|
|
p = scrh->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++ =PADDRH(tryloop);
|
|
|
|
assert ((u_long)p == (u_long)&scrh->tryloop + sizeof (scrh->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) KVAR (KVAR_TICKS);
|
|
*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) KVAR (KVAR_TICKS);
|
|
*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));
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Copy and rebind a script.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_script_copy_and_bind (ncb_p np, ncrcmd *src, ncrcmd *dst, int len)
|
|
{
|
|
ncrcmd opcode, new, old, tmp1, tmp2;
|
|
ncrcmd *start, *end;
|
|
int relocs;
|
|
|
|
start = src;
|
|
end = src + len/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), (int) (src-start-1));
|
|
DELAY (1000000);
|
|
};
|
|
|
|
if (DEBUG_FLAGS & DEBUG_SCRIPT)
|
|
printf ("%p: <%x>\n",
|
|
(src-1), (unsigned)opcode);
|
|
|
|
/*
|
|
** We don't have to decode ALL commands
|
|
*/
|
|
switch (opcode >> 28) {
|
|
|
|
case 0xc:
|
|
/*
|
|
** COPY has TWO arguments.
|
|
*/
|
|
relocs = 2;
|
|
tmp1 = src[0];
|
|
if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
|
|
tmp1 = 0;
|
|
tmp2 = src[1];
|
|
if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
|
|
tmp2 = 0;
|
|
if ((tmp1 ^ tmp2) & 3) {
|
|
printf ("%s: ERROR1 IN SCRIPT at %d.\n",
|
|
ncr_name(np), (int) (src-start-1));
|
|
DELAY (1000000);
|
|
}
|
|
/*
|
|
** If PREFETCH feature not enabled, remove
|
|
** the NO FLUSH bit if present.
|
|
*/
|
|
if ((opcode & SCR_NO_FLUSH) && !(np->features&FE_PFEN))
|
|
dst[-1] = (opcode & ~SCR_NO_FLUSH);
|
|
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) + np->p_script;
|
|
break;
|
|
case RELOC_LABELH:
|
|
new = (old & ~RELOC_MASK) + np->p_scripth;
|
|
break;
|
|
case RELOC_SOFTC:
|
|
new = (old & ~RELOC_MASK) + vtophys(np);
|
|
break;
|
|
case RELOC_KVAR:
|
|
if (((old & ~RELOC_MASK) <
|
|
SCRIPT_KVAR_FIRST) ||
|
|
((old & ~RELOC_MASK) >
|
|
SCRIPT_KVAR_LAST))
|
|
panic("ncr KVAR out of range");
|
|
new = vtophys(script_kvars[old &
|
|
~RELOC_MASK]);
|
|
break;
|
|
case 0:
|
|
/* Don't relocate a 0 address. */
|
|
if (old == 0) {
|
|
new = old;
|
|
break;
|
|
}
|
|
/* fall through */
|
|
default:
|
|
panic("ncr_script_copy_and_bind: weird relocation %x @ %d\n", old, (src - start));
|
|
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 ((unsigned long)bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE;
|
|
}
|
|
|
|
/*----------------------------------------------------------
|
|
**
|
|
** Maximal number of outstanding requests per target.
|
|
**
|
|
**----------------------------------------------------------
|
|
*/
|
|
|
|
u_int32_t ncr_info (int unit)
|
|
{
|
|
return (1); /* may be changed later */
|
|
}
|
|
|
|
/*----------------------------------------------------------
|
|
**
|
|
** NCR chip devices table and chip look up function.
|
|
** Features bit are defined in ncrreg.h. Is it the
|
|
** right place?
|
|
**
|
|
**----------------------------------------------------------
|
|
*/
|
|
typedef struct {
|
|
unsigned long device_id;
|
|
unsigned short minrevid;
|
|
char *name;
|
|
unsigned char maxburst;
|
|
unsigned char maxoffs;
|
|
unsigned char clock_divn;
|
|
unsigned int features;
|
|
} ncr_chip;
|
|
|
|
static ncr_chip ncr_chip_table[] = {
|
|
{NCR_810_ID, 0x00, "ncr 53c810 fast10 scsi", 4, 8, 4,
|
|
FE_ERL}
|
|
,
|
|
{NCR_810_ID, 0x10, "ncr 53c810a fast10 scsi", 4, 8, 4,
|
|
FE_ERL|FE_LDSTR|FE_PFEN|FE_BOF}
|
|
,
|
|
{NCR_815_ID, 0x00, "ncr 53c815 fast10 scsi", 4, 8, 4,
|
|
FE_ERL|FE_BOF}
|
|
,
|
|
{NCR_820_ID, 0x00, "ncr 53c820 fast10 wide scsi", 4, 8, 4,
|
|
FE_WIDE|FE_ERL}
|
|
,
|
|
{NCR_825_ID, 0x00, "ncr 53c825 fast10 wide scsi", 4, 8, 4,
|
|
FE_WIDE|FE_ERL|FE_BOF}
|
|
,
|
|
{NCR_825_ID, 0x10, "ncr 53c825a fast10 wide scsi", 7, 8, 4,
|
|
FE_WIDE|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
,
|
|
{NCR_860_ID, 0x00, "ncr 53c860 fast20 scsi", 4, 8, 5,
|
|
FE_ULTRA|FE_CLK80|FE_CACHE_SET|FE_LDSTR|FE_PFEN}
|
|
,
|
|
{NCR_875_ID, 0x00, "ncr 53c875 fast20 wide scsi", 7, 16, 5,
|
|
FE_WIDE|FE_ULTRA|FE_CLK80|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
,
|
|
{NCR_875_ID, 0x02, "ncr 53c875 fast20 wide scsi", 7, 16, 5,
|
|
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
,
|
|
{NCR_875_ID2, 0x00, "ncr 53c875j fast20 wide scsi", 7, 16, 5,
|
|
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
,
|
|
{NCR_885_ID, 0x00, "ncr 53c885 fast20 wide scsi", 7, 16, 5,
|
|
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
,
|
|
{NCR_895_ID, 0x00, "ncr 53c895 fast40 wide scsi", 7, 31, 7,
|
|
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
,
|
|
{NCR_896_ID, 0x00, "ncr 53c896 fast40 wide scsi", 7, 31, 7,
|
|
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
|
|
};
|
|
|
|
static int ncr_chip_lookup(u_long device_id, u_char revision_id)
|
|
{
|
|
int i, found;
|
|
|
|
found = -1;
|
|
for (i = 0; i < sizeof(ncr_chip_table)/sizeof(ncr_chip_table[0]); i++) {
|
|
if (device_id == ncr_chip_table[i].device_id &&
|
|
ncr_chip_table[i].minrevid <= revision_id) {
|
|
if (found < 0 ||
|
|
ncr_chip_table[found].minrevid
|
|
< ncr_chip_table[i].minrevid) {
|
|
found = i;
|
|
}
|
|
}
|
|
}
|
|
return found;
|
|
}
|
|
|
|
/*----------------------------------------------------------
|
|
**
|
|
** Probe the hostadapter.
|
|
**
|
|
**----------------------------------------------------------
|
|
*/
|
|
|
|
#ifdef __NetBSD__
|
|
|
|
int
|
|
ncr_probe(parent, match, aux)
|
|
struct device *parent;
|
|
void *match, *aux;
|
|
{
|
|
struct cfdata *cf = match;
|
|
struct pci_attach_args *pa = aux;
|
|
|
|
#if 0
|
|
if (!pci_targmatch(cf, pa))
|
|
return 0;
|
|
#endif
|
|
if (ncr_chip_lookup(pa->pa_id, 0xff) < 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#else /* !__NetBSD__ */
|
|
|
|
|
|
static char* ncr_probe (pcici_t tag, pcidi_t type)
|
|
{
|
|
u_char rev = pci_conf_read (tag, PCI_CLASS_REG) & 0xff;
|
|
int i;
|
|
|
|
i = ncr_chip_lookup(type, rev);
|
|
if (i >= 0)
|
|
return ncr_chip_table[i].name;
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
#endif /* !__NetBSD__ */
|
|
|
|
|
|
/*==========================================================
|
|
**
|
|
** NCR chip clock divisor table.
|
|
** Divisors are multiplied by 10,000,000 in order to make
|
|
** calculations more simple.
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
#define _5M 5000000
|
|
static u_long div_10M[] =
|
|
{2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
|
|
|
|
/*===============================================================
|
|
**
|
|
** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
|
|
** transfers. 32,64,128 are only supported by 875 and 895 chips.
|
|
** We use log base 2 (burst length) as internal code, with
|
|
** value 0 meaning "burst disabled".
|
|
**
|
|
**===============================================================
|
|
*/
|
|
|
|
/*
|
|
* Burst length from burst code.
|
|
*/
|
|
#define burst_length(bc) (!(bc))? 0 : 1 << (bc)
|
|
|
|
/*
|
|
* Burst code from io register bits.
|
|
*/
|
|
#define burst_code(dmode, ctest4, ctest5) \
|
|
(ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
|
|
|
|
/*
|
|
* Set initial io register bits from burst code.
|
|
*/
|
|
static void ncr_init_burst(ncb_p np, u_char bc)
|
|
{
|
|
np->rv_ctest4 &= ~0x80;
|
|
np->rv_dmode &= ~(0x3 << 6);
|
|
np->rv_ctest5 &= ~0x4;
|
|
|
|
if (!bc) {
|
|
np->rv_ctest4 |= 0x80;
|
|
}
|
|
else {
|
|
--bc;
|
|
np->rv_dmode |= ((bc & 0x3) << 6);
|
|
np->rv_ctest5 |= (bc & 0x4);
|
|
}
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Auto configuration: attach and init a host adapter.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
#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;
|
|
u_char rev = 0;
|
|
u_long period;
|
|
int i;
|
|
ncr_chip *chip;
|
|
|
|
/*
|
|
** XXX NetBSD
|
|
** 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 = pci_map_int(pa->pa_tag, PCI_IPL_BIO, ncr_intr, np);
|
|
if (np->sc_ih == NULL)
|
|
return;
|
|
|
|
|
|
#else /* !__NetBSD__ */
|
|
|
|
static void ncr_attach (pcici_t config_id, int unit)
|
|
{
|
|
ncb_p np = (struct ncb*) 0;
|
|
#if ! (__FreeBSD__ >= 2)
|
|
extern unsigned bio_imask;
|
|
#endif
|
|
|
|
#if (__FreeBSD__ >= 2)
|
|
struct scsibus_data *scbus;
|
|
#endif
|
|
u_char rev = 0;
|
|
u_long period;
|
|
int i;
|
|
|
|
/*
|
|
** allocate and initialize structures.
|
|
*/
|
|
|
|
if (!np) {
|
|
np = (ncb_p) malloc (sizeof (struct ncb), M_DEVBUF, M_WAITOK);
|
|
if (!np) return;
|
|
ncrp[unit]=np;
|
|
}
|
|
bzero (np, sizeof (*np));
|
|
|
|
np->ccb = (ccb_p) malloc (sizeof (struct ccb), M_DEVBUF, M_WAITOK);
|
|
if (!np->ccb) return;
|
|
bzero (np->ccb, sizeof (*np->ccb));
|
|
|
|
np->unit = unit;
|
|
|
|
/*
|
|
** Try to map the controller chip to
|
|
** virtual and physical memory.
|
|
*/
|
|
|
|
if (!pci_map_mem (config_id, 0x14, &np->vaddr, &np->paddr))
|
|
return;
|
|
|
|
/*
|
|
** 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;
|
|
|
|
#ifdef NCR_IOMAPPED
|
|
/*
|
|
** Try to map the controller chip into iospace.
|
|
*/
|
|
|
|
if (!pci_map_port (config_id, 0x10, &np->port))
|
|
return;
|
|
#endif
|
|
|
|
#endif /* !__NetBSD__ */
|
|
|
|
/*
|
|
** Save some controller register default values
|
|
*/
|
|
|
|
np->rv_scntl3 = INB(nc_scntl3) & 0x77;
|
|
np->rv_dmode = INB(nc_dmode) & 0xce;
|
|
np->rv_dcntl = INB(nc_dcntl) & 0xa9;
|
|
np->rv_ctest3 = INB(nc_ctest3) & 0x01;
|
|
np->rv_ctest4 = INB(nc_ctest4) & 0x88;
|
|
np->rv_ctest5 = INB(nc_ctest5) & 0x24;
|
|
np->rv_gpcntl = INB(nc_gpcntl);
|
|
np->rv_stest2 = INB(nc_stest2) & 0x20;
|
|
|
|
if (bootverbose >= 2) {
|
|
printf ("\tBIOS values: SCNTL3:%02x DMODE:%02x DCNTL:%02x\n",
|
|
np->rv_scntl3, np->rv_dmode, np->rv_dcntl);
|
|
printf ("\t CTEST3:%02x CTEST4:%02x CTEST5:%02x\n",
|
|
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
|
|
}
|
|
|
|
np->rv_dcntl |= NOCOM;
|
|
|
|
/*
|
|
** Do chip dependent initialization.
|
|
*/
|
|
|
|
#ifndef __NetBSD__
|
|
rev = pci_conf_read (config_id, PCI_CLASS_REG) & 0xff;
|
|
#endif /* !__NetBSD__ */
|
|
|
|
/*
|
|
** Get chip features from chips table.
|
|
*/
|
|
#ifdef __NetBSD__
|
|
i = ncr_chip_lookup(pa->pa_id, rev);
|
|
#else /* !__NetBSD__ */
|
|
i = ncr_chip_lookup(pci_conf_read(config_id, PCI_ID_REG), rev);
|
|
#endif /* __NetBSD__ */
|
|
|
|
if (i >= 0) {
|
|
np->maxburst = ncr_chip_table[i].maxburst;
|
|
np->maxoffs = ncr_chip_table[i].maxoffs;
|
|
np->clock_divn = ncr_chip_table[i].clock_divn;
|
|
np->features = ncr_chip_table[i].features;
|
|
} else { /* Should'nt happen if probe() is ok */
|
|
np->maxburst = 4;
|
|
np->maxoffs = 8;
|
|
np->clock_divn = 4;
|
|
np->features = FE_ERL;
|
|
}
|
|
|
|
np->maxwide = np->features & FE_WIDE ? 1 : 0;
|
|
np->clock_khz = np->features & FE_CLK80 ? 80000 : 40000;
|
|
if (np->features & FE_QUAD) np->multiplier = 4;
|
|
else if (np->features & FE_DBLR) np->multiplier = 2;
|
|
else np->multiplier = 1;
|
|
|
|
/*
|
|
** Get the frequency of the chip's clock.
|
|
** Find the right value for scntl3.
|
|
*/
|
|
if (np->features & (FE_ULTRA|FE_ULTRA2))
|
|
ncr_getclock(np, np->multiplier);
|
|
|
|
#ifdef NCR_TEKRAM_EEPROM
|
|
if (bootverbose) {
|
|
printf ("%s: Tekram EEPROM read %s\n",
|
|
ncr_name(np),
|
|
read_tekram_eeprom (np, NULL) ?
|
|
"succeeded" : "failed");
|
|
}
|
|
#endif /* NCR_TEKRAM_EEPROM */
|
|
|
|
/*
|
|
* If scntl3 != 0, we assume BIOS is present.
|
|
*/
|
|
if (np->rv_scntl3)
|
|
np->features |= FE_BIOS;
|
|
|
|
/*
|
|
* Divisor to be used for async (timer pre-scaler).
|
|
*/
|
|
i = np->clock_divn - 1;
|
|
while (i >= 0) {
|
|
--i;
|
|
if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
|
|
++i;
|
|
break;
|
|
}
|
|
}
|
|
np->rv_scntl3 = i+1;
|
|
|
|
/*
|
|
* Minimum synchronous period factor supported by the chip.
|
|
* Btw, 'period' is in tenths of nanoseconds.
|
|
*/
|
|
|
|
period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
|
|
if (period <= 250) np->minsync = 10;
|
|
else if (period <= 303) np->minsync = 11;
|
|
else if (period <= 500) np->minsync = 12;
|
|
else np->minsync = (period + 40 - 1) / 40;
|
|
|
|
/*
|
|
* Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
|
|
*/
|
|
|
|
if (np->minsync < 25 && !(np->features & (FE_ULTRA|FE_ULTRA2)))
|
|
np->minsync = 25;
|
|
else if (np->minsync < 12 && !(np->features & FE_ULTRA2))
|
|
np->minsync = 12;
|
|
|
|
/*
|
|
* Maximum synchronous period factor supported by the chip.
|
|
*/
|
|
|
|
period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
|
|
np->maxsync = period > 2540 ? 254 : period / 10;
|
|
|
|
/*
|
|
* Now, some features available with Symbios compatible boards.
|
|
* LED support through GPIO0 and DIFF support.
|
|
*/
|
|
|
|
#ifdef SCSI_NCR_SYMBIOS_COMPAT
|
|
if (!(np->rv_gpcntl & 0x01))
|
|
np->features |= FE_LED0;
|
|
#if 0 /* Not safe enough without NVRAM support or user settable option */
|
|
if (!(INB(nc_gpreg) & 0x08))
|
|
np->features |= FE_DIFF;
|
|
#endif
|
|
#endif /* SCSI_NCR_SYMBIOS_COMPAT */
|
|
|
|
/*
|
|
* Prepare initial IO registers settings.
|
|
* Trust BIOS only if we believe we have one and if we want to.
|
|
*/
|
|
#ifdef SCSI_NCR_TRUST_BIOS
|
|
if (!(np->features & FE_BIOS)) {
|
|
#else
|
|
if (1) {
|
|
#endif
|
|
np->rv_dmode = 0;
|
|
np->rv_dcntl = NOCOM;
|
|
np->rv_ctest3 = 0;
|
|
np->rv_ctest4 = MPEE;
|
|
np->rv_ctest5 = 0;
|
|
np->rv_stest2 = 0;
|
|
|
|
if (np->features & FE_ERL)
|
|
np->rv_dmode |= ERL; /* Enable Read Line */
|
|
if (np->features & FE_BOF)
|
|
np->rv_dmode |= BOF; /* Burst Opcode Fetch */
|
|
if (np->features & FE_ERMP)
|
|
np->rv_dmode |= ERMP; /* Enable Read Multiple */
|
|
if (np->features & FE_CLSE)
|
|
np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
|
|
if (np->features & FE_WRIE)
|
|
np->rv_ctest3 |= WRIE; /* Write and Invalidate */
|
|
if (np->features & FE_PFEN)
|
|
np->rv_dcntl |= PFEN; /* Prefetch Enable */
|
|
if (np->features & FE_DFS)
|
|
np->rv_ctest5 |= DFS; /* Dma Fifo Size */
|
|
if (np->features & FE_DIFF)
|
|
np->rv_stest2 |= 0x20; /* Differential mode */
|
|
ncr_init_burst(np, np->maxburst); /* Max dwords burst length */
|
|
} else {
|
|
np->maxburst =
|
|
burst_code(np->rv_dmode, np->rv_ctest4, np->rv_ctest5);
|
|
}
|
|
|
|
#ifndef NCR_IOMAPPED
|
|
/*
|
|
** Get on-chip SRAM address, if supported
|
|
*/
|
|
if ((np->features & FE_RAM) && sizeof(struct script) <= 4096)
|
|
#ifdef __NetBSD__
|
|
(void)pci_map_mem(pa->pa_tag, 0x18, &np->vaddr2, &np->paddr2));
|
|
#else /* !__NetBSD__ */
|
|
(void)(!pci_map_mem (config_id,0x18, &np->vaddr2, &np->paddr2));
|
|
#endif /* __NetBSD */
|
|
#endif /* !NCR_IOMAPPED */
|
|
|
|
/*
|
|
** Allocate structure for script relocation.
|
|
*/
|
|
if (np->vaddr2 != NULL) {
|
|
np->script = (struct script *) np->vaddr2;
|
|
np->p_script = np->paddr2;
|
|
#ifdef __FreeBSD__
|
|
} else if (sizeof (struct script) > PAGE_SIZE) {
|
|
np->script = (struct script*) vm_page_alloc_contig
|
|
(round_page(sizeof (struct script)),
|
|
0x100000, 0xffffffff, PAGE_SIZE);
|
|
#endif /* __FreeBSD__ */
|
|
} else {
|
|
np->script = (struct script *)
|
|
malloc (sizeof (struct script), M_DEVBUF, M_WAITOK);
|
|
}
|
|
|
|
#ifdef __FreeBSD__
|
|
if (sizeof (struct scripth) > PAGE_SIZE) {
|
|
np->scripth = (struct scripth*) vm_page_alloc_contig
|
|
(round_page(sizeof (struct scripth)),
|
|
0x100000, 0xffffffff, PAGE_SIZE);
|
|
} else
|
|
#endif /* __FreeBSD__ */
|
|
{
|
|
np->scripth = (struct scripth *)
|
|
malloc (sizeof (struct scripth), M_DEVBUF, M_WAITOK);
|
|
}
|
|
|
|
#ifdef SCSI_NCR_PCI_CONFIG_FIXUP
|
|
/*
|
|
** If cache line size is enabled, check PCI config space and
|
|
** try to fix it up if necessary.
|
|
*/
|
|
#ifdef PCIR_CACHELNSZ /* To be sure that new PCI stuff is present */
|
|
{
|
|
u_char cachelnsz = pci_cfgread(config_id, PCIR_CACHELNSZ, 1);
|
|
u_short command = pci_cfgread(config_id, PCIR_COMMAND, 2);
|
|
|
|
if (!cachelnsz) {
|
|
cachelnsz = 8;
|
|
printf("%s: setting PCI cache line size register to %d.\n",
|
|
ncr_name(np), (int)cachelnsz);
|
|
pci_cfgwrite(config_id, PCIR_CACHELNSZ, cachelnsz, 1);
|
|
}
|
|
|
|
if (!(command & (1<<4))) {
|
|
command |= (1<<4);
|
|
printf("%s: setting PCI command write and invalidate.\n",
|
|
ncr_name(np));
|
|
pci_cfgwrite(config_id, PCIR_COMMAND, command, 2);
|
|
}
|
|
}
|
|
#endif /* PCIR_CACHELNSZ */
|
|
|
|
#endif /* SCSI_NCR_PCI_CONFIG_FIXUP */
|
|
|
|
/*
|
|
** Bells and whistles ;-)
|
|
*/
|
|
if (bootverbose)
|
|
printf("%s: minsync=%d, maxsync=%d, maxoffs=%d, %d dwords burst, %s dma fifo\n",
|
|
ncr_name(np), np->minsync, np->maxsync, np->maxoffs,
|
|
burst_length(np->maxburst),
|
|
(np->rv_ctest5 & DFS) ? "large" : "normal");
|
|
|
|
/*
|
|
** Print some complementary information that can be helpfull.
|
|
*/
|
|
if (bootverbose)
|
|
printf("%s: %s, %s IRQ driver%s\n",
|
|
ncr_name(np),
|
|
np->rv_stest2 & 0x20 ? "differential" : "single-ended",
|
|
np->rv_dcntl & IRQM ? "totem pole" : "open drain",
|
|
np->vaddr2 ? ", using on-chip SRAM" : "");
|
|
|
|
/*
|
|
** Patch scripts to physical addresses
|
|
*/
|
|
ncr_script_fill (&script0, &scripth0);
|
|
|
|
np->p_script = vtophys(np->script);
|
|
np->p_scripth = vtophys(np->scripth);
|
|
|
|
ncr_script_copy_and_bind (np, (ncrcmd *) &script0,
|
|
(ncrcmd *) np->script, sizeof(struct script));
|
|
|
|
ncr_script_copy_and_bind (np, (ncrcmd *) &scripth0,
|
|
(ncrcmd *) np->scripth, sizeof(struct scripth));
|
|
|
|
np->ccb->p_ccb = vtophys (np->ccb);
|
|
|
|
/*
|
|
** Patch the script for LED support.
|
|
*/
|
|
|
|
if (np->features & FE_LED0) {
|
|
np->script->reselect[0] = SCR_REG_REG(gpreg, SCR_OR, 0x01);
|
|
np->script->reselect1[0] = SCR_REG_REG(gpreg, SCR_AND, 0xfe);
|
|
np->script->reselect2[0] = SCR_REG_REG(gpreg, SCR_AND, 0xfe);
|
|
}
|
|
|
|
/*
|
|
** init data structure
|
|
*/
|
|
|
|
np->jump_tcb.l_cmd = SCR_JUMP;
|
|
np->jump_tcb.l_paddr = NCB_SCRIPTH_PHYS (np, abort);
|
|
|
|
/*
|
|
** Get SCSI addr of host adapter (set by bios?).
|
|
*/
|
|
|
|
np->myaddr = INB(nc_scid) & 0x07;
|
|
if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR;
|
|
|
|
#ifdef NCR_DUMP_REG
|
|
/*
|
|
** Log the initial register contents
|
|
*/
|
|
{
|
|
int reg;
|
|
#ifdef __NetBSD__
|
|
u_long config_id = pa->pa_tag;
|
|
#endif /* __NetBSD__ */
|
|
for (reg=0; reg<256; reg+=4) {
|
|
if (reg%16==0) printf ("reg[%2x]", reg);
|
|
printf (" %08x", (int)pci_conf_read (config_id, reg));
|
|
if (reg%16==12) printf ("\n");
|
|
}
|
|
}
|
|
#endif /* NCR_DUMP_REG */
|
|
|
|
/*
|
|
** Reset chip.
|
|
*/
|
|
|
|
OUTB (nc_istat, SRST);
|
|
DELAY (1000);
|
|
OUTB (nc_istat, 0 );
|
|
|
|
|
|
/*
|
|
** Now check the cache handling of the pci chipset.
|
|
*/
|
|
|
|
if (ncr_snooptest (np)) {
|
|
printf ("CACHE INCORRECTLY CONFIGURED.\n");
|
|
return;
|
|
};
|
|
|
|
#ifndef __NetBSD__
|
|
/*
|
|
** Install the interrupt handler.
|
|
*/
|
|
|
|
if (!pci_map_int (config_id, ncr_intr, np, &bio_imask))
|
|
printf ("\tinterruptless mode: reduced performance.\n");
|
|
#endif /* __NetBSD__ */
|
|
|
|
/*
|
|
** 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);
|
|
DELAY (1000);
|
|
|
|
/*
|
|
** Process the reset exception,
|
|
** if interrupts are not enabled yet.
|
|
** Then enable disconnects.
|
|
*/
|
|
ncr_exception (np);
|
|
np->disc = 1;
|
|
|
|
/*
|
|
** Now let the generic SCSI driver
|
|
** look for the SCSI devices on the bus ..
|
|
*/
|
|
|
|
#ifdef __NetBSD__
|
|
np->sc_link.adapter_softc = np;
|
|
np->sc_link.adapter_target = np->myaddr;
|
|
np->sc_link.openings = 1;
|
|
#else /* !__NetBSD__ */
|
|
np->sc_link.adapter_unit = unit;
|
|
np->sc_link.adapter_softc = np;
|
|
np->sc_link.adapter_targ = np->myaddr;
|
|
np->sc_link.fordriver = 0;
|
|
#endif /* !__NetBSD__ */
|
|
np->sc_link.adapter = &ncr_switch;
|
|
np->sc_link.device = &ncr_dev;
|
|
np->sc_link.flags = 0;
|
|
|
|
#ifdef __NetBSD__
|
|
config_found(self, &np->sc_link, ncr_print);
|
|
#else /* !__NetBSD__ */
|
|
#if (__FreeBSD__ >= 2)
|
|
scbus = scsi_alloc_bus();
|
|
if(!scbus)
|
|
return;
|
|
scbus->adapter_link = &np->sc_link;
|
|
|
|
if(np->maxwide)
|
|
scbus->maxtarg = 15;
|
|
|
|
if (bootverbose) {
|
|
unsigned t_from = 0;
|
|
unsigned t_to = scbus->maxtarg;
|
|
unsigned myaddr = np->myaddr;
|
|
|
|
char *txt_and = "";
|
|
printf ("%s scanning for targets ", ncr_name (np));
|
|
if (t_from < myaddr) {
|
|
printf ("%d..%d ", t_from, myaddr -1);
|
|
txt_and = "and ";
|
|
}
|
|
if (myaddr < t_to)
|
|
printf ("%s%d..%d ", txt_and, myaddr +1, t_to);
|
|
printf ("(V%d " NCR_DATE ")\n", NCR_VERSION);
|
|
}
|
|
|
|
scsi_attachdevs (scbus);
|
|
scbus = NULL; /* Upper-level SCSI code owns this now */
|
|
#else
|
|
scsi_attachdevs (&np->sc_link);
|
|
#endif /* !__FreeBSD__ >= 2 */
|
|
#endif /* !__NetBSD__ */
|
|
|
|
/*
|
|
** start the timeout daemon
|
|
*/
|
|
ncr_timeout (np);
|
|
np->lasttime=0;
|
|
|
|
/*
|
|
** use SIMPLE TAG messages by default
|
|
*/
|
|
|
|
np->order = M_SIMPLE_TAG;
|
|
|
|
/*
|
|
** Done.
|
|
*/
|
|
|
|
return;
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Process pending device interrupts.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void
|
|
ncr_intr(vnp)
|
|
void *vnp;
|
|
{
|
|
ncb_p np = vnp;
|
|
int oldspl = splbio();
|
|
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
|
|
|
|
if (INB(nc_istat) & (INTF|SIP|DIP)) {
|
|
/*
|
|
** Repeat until no outstanding ints
|
|
*/
|
|
do {
|
|
ncr_exception (np);
|
|
} while (INB(nc_istat) & (INTF|SIP|DIP));
|
|
|
|
np->ticks = 100;
|
|
};
|
|
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
|
|
|
|
splx (oldspl);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Start execution of a SCSI command.
|
|
** This is called from the generic SCSI driver.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static int32_t ncr_start (struct scsi_xfer * xp)
|
|
{
|
|
ncb_p np = (ncb_p) xp->sc_link->adapter_softc;
|
|
|
|
struct scsi_generic * cmd = xp->cmd;
|
|
ccb_p cp;
|
|
lcb_p lp;
|
|
tcb_p tp = &np->target[xp->sc_link->target];
|
|
|
|
int i, oldspl, segments, flags = xp->flags;
|
|
u_char qidx, nego, idmsg, *msgptr;
|
|
u_long msglen, msglen2;
|
|
|
|
/*---------------------------------------------
|
|
**
|
|
** Reset SCSI bus
|
|
**
|
|
** Interrupt handler does the real work.
|
|
**
|
|
**---------------------------------------------
|
|
*/
|
|
|
|
if (flags & SCSI_RESET) {
|
|
OUTB (nc_scntl1, CRST);
|
|
DELAY (1000);
|
|
return(COMPLETE);
|
|
};
|
|
|
|
/*---------------------------------------------
|
|
**
|
|
** Some shortcuts ...
|
|
**
|
|
**---------------------------------------------
|
|
*/
|
|
|
|
if ((xp->sc_link->target == np->myaddr ) ||
|
|
(xp->sc_link->target >= MAX_TARGET) ||
|
|
(xp->sc_link->lun >= MAX_LUN ) ||
|
|
(flags & SCSI_DATA_UIO)) {
|
|
xp->error = XS_DRIVER_STUFFUP;
|
|
return(COMPLETE);
|
|
};
|
|
|
|
/*---------------------------------------------
|
|
**
|
|
** Diskaccess to partial blocks?
|
|
**
|
|
**---------------------------------------------
|
|
*/
|
|
|
|
if ((xp->datalen & 0x1ff) && !(tp->inqdata[0] & 0x1f)) {
|
|
switch (cmd->opcode) {
|
|
case 0x28: /* READ_BIG (10) */
|
|
case 0xa8: /* READ_HUGE (12) */
|
|
case 0x2a: /* WRITE_BIG (10) */
|
|
case 0xaa: /* WRITE_HUGE(12) */
|
|
PRINT_ADDR(xp);
|
|
printf ("access to partial disk block refused.\n");
|
|
xp->error = XS_DRIVER_STUFFUP;
|
|
return(COMPLETE);
|
|
};
|
|
};
|
|
|
|
if ((unsigned)xp->datalen > 128*1024*1024) {
|
|
PRINT_ADDR(xp);
|
|
printf ("trying to transfer %8x bytes, mem addr = %8x\n",
|
|
xp->datalen, xp->data);
|
|
{
|
|
int j;
|
|
PRINT_ADDR(xp);
|
|
printf ("command: %2x (", cmd->opcode);
|
|
for (j = 0; j<11; j++)
|
|
printf (" %2x", cmd->bytes[j]);
|
|
printf (")\n");
|
|
}
|
|
}
|
|
|
|
if (DEBUG_FLAGS & DEBUG_TINY) {
|
|
PRINT_ADDR(xp);
|
|
printf ("CMD=%x F=%x A=%x L=%x ",
|
|
cmd->opcode, (unsigned)xp->flags,
|
|
(unsigned) xp->data, (unsigned) xp->datalen);
|
|
}
|
|
|
|
/*--------------------------------------------
|
|
**
|
|
** 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 / bind xp
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
oldspl = splbio();
|
|
|
|
if (!(cp=ncr_get_ccb (np, flags, xp->sc_link->target, xp->sc_link->lun))) {
|
|
printf ("%s: no ccb.\n", ncr_name (np));
|
|
xp->error = XS_DRIVER_STUFFUP;
|
|
splx(oldspl);
|
|
return(TRY_AGAIN_LATER);
|
|
};
|
|
cp->xfer = xp;
|
|
|
|
/*---------------------------------------------------
|
|
**
|
|
** timestamp
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
bzero (&cp->phys.header.stamp, sizeof (struct tstamp));
|
|
cp->phys.header.stamp.start = ticks;
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Get device quirks from a speciality table.
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
if (tp->quirks & QUIRK_UPDATE) {
|
|
int q = xp->sc_link->quirks;
|
|
tp->quirks = QUIRK_NOMSG;
|
|
if (q & SD_Q_NO_TAGS)
|
|
tp->quirks |= QUIRK_NOTAGS;
|
|
if (q & SD_Q_NO_SYNC)
|
|
tp->quirks |= QUIRK_NOSYNC;
|
|
if (q & SD_Q_NO_WIDE)
|
|
tp->quirks |= QUIRK_NOWIDE16;
|
|
if (bootverbose && tp->quirks) {
|
|
PRINT_ADDR(xp);
|
|
printf ("NCR quirks=0x%x\n", tp->quirks);
|
|
};
|
|
/*
|
|
** set number of tags
|
|
*/
|
|
ncr_setmaxtags (tp, tp->usrtags);
|
|
};
|
|
|
|
/*---------------------------------------------------
|
|
**
|
|
** negotiation required?
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
nego = 0;
|
|
|
|
if (!tp->nego_cp && tp->inqdata[7]) {
|
|
/*
|
|
** negotiate wide transfers ?
|
|
*/
|
|
|
|
if (!tp->widedone) {
|
|
if (tp->inqdata[7] & INQ7_WIDE16) {
|
|
nego = NS_WIDE;
|
|
} else
|
|
tp->widedone=1;
|
|
};
|
|
|
|
/*
|
|
** negotiate synchronous transfers?
|
|
*/
|
|
|
|
if (!nego && !tp->period) {
|
|
if (SCSI_NCR_DFLT_SYNC
|
|
#if defined (CDROM_ASYNC)
|
|
&& ((tp->inqdata[0] & 0x1f) != 5)
|
|
#endif
|
|
&& (tp->inqdata[7] & INQ7_SYNC)) {
|
|
nego = NS_SYNC;
|
|
} else {
|
|
tp->period =0xffff;
|
|
tp->sval = 0xe0;
|
|
PRINT_ADDR(xp);
|
|
printf ("asynchronous.\n");
|
|
};
|
|
};
|
|
|
|
/*
|
|
** remember nego is pending for the target.
|
|
** Avoid to start a nego for all queued commands
|
|
** when tagged command queuing is enabled.
|
|
*/
|
|
|
|
if (nego)
|
|
tp->nego_cp = cp;
|
|
};
|
|
|
|
/*---------------------------------------------------
|
|
**
|
|
** choose a new tag ...
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
if ((lp = tp->lp[xp->sc_link->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;
|
|
if (DEBUG_FLAGS & DEBUG_TAGS) {
|
|
PRINT_ADDR(xp);
|
|
printf ("using tag #%d.\n", cp->tag);
|
|
};
|
|
};
|
|
} else {
|
|
cp->tag=0;
|
|
};
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Build the identify / tag / sdtr message
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
idmsg = M_IDENTIFY | xp->sc_link->lun;
|
|
if ((cp!=np->ccb) && (np->disc))
|
|
idmsg |= 0x40;
|
|
|
|
msgptr = cp->scsi_smsg;
|
|
msglen = 0;
|
|
msgptr[msglen++] = idmsg;
|
|
|
|
if (cp->tag) {
|
|
char tag;
|
|
|
|
tag = np->order;
|
|
if (tag == 0) {
|
|
/*
|
|
** Ordered write ops, unordered read ops.
|
|
*/
|
|
switch (cmd->opcode) {
|
|
case 0x08: /* READ_SMALL (6) */
|
|
case 0x28: /* READ_BIG (10) */
|
|
case 0xa8: /* READ_HUGE (12) */
|
|
tag = M_SIMPLE_TAG;
|
|
break;
|
|
default:
|
|
tag = M_ORDERED_TAG;
|
|
}
|
|
}
|
|
msgptr[msglen++] = tag;
|
|
msgptr[msglen++] = cp -> tag;
|
|
}
|
|
|
|
switch (nego) {
|
|
case NS_SYNC:
|
|
msgptr[msglen++] = M_EXTENDED;
|
|
msgptr[msglen++] = 3;
|
|
msgptr[msglen++] = M_X_SYNC_REQ;
|
|
msgptr[msglen++] = tp->minsync;
|
|
msgptr[msglen++] = tp->maxoffs;
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("sync msgout: ");
|
|
ncr_show_msg (&cp->scsi_smsg [msglen-5]);
|
|
printf (".\n");
|
|
};
|
|
break;
|
|
case NS_WIDE:
|
|
msgptr[msglen++] = M_EXTENDED;
|
|
msgptr[msglen++] = 2;
|
|
msgptr[msglen++] = M_X_WIDE_REQ;
|
|
msgptr[msglen++] = tp->usrwide;
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("wide msgout: ");
|
|
ncr_show_msg (&cp->scsi_smsg [msglen-4]);
|
|
printf (".\n");
|
|
};
|
|
break;
|
|
};
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Build the identify message for getcc.
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
cp -> scsi_smsg2 [0] = idmsg;
|
|
msglen2 = 1;
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Build the data descriptors
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
segments = ncr_scatter (&cp->phys, (vm_offset_t) xp->data,
|
|
(vm_size_t) xp->datalen);
|
|
|
|
if (segments < 0) {
|
|
xp->error = XS_DRIVER_STUFFUP;
|
|
ncr_free_ccb(np, cp, flags);
|
|
splx(oldspl);
|
|
return(COMPLETE);
|
|
};
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Set the SAVED_POINTER.
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
if (flags & SCSI_DATA_IN) {
|
|
cp->phys.header.savep = NCB_SCRIPT_PHYS (np, data_in);
|
|
cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16;
|
|
} else if (flags & SCSI_DATA_OUT) {
|
|
cp->phys.header.savep = NCB_SCRIPT_PHYS (np, data_out);
|
|
cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16;
|
|
} else {
|
|
cp->phys.header.savep = NCB_SCRIPT_PHYS (np, no_data);
|
|
cp->phys.header.goalp = cp->phys.header.savep;
|
|
};
|
|
cp->phys.header.lastp = cp->phys.header.savep;
|
|
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** fill in ccb
|
|
**
|
|
**----------------------------------------------------
|
|
**
|
|
**
|
|
** physical -> virtual backlink
|
|
** Generic SCSI command
|
|
*/
|
|
cp->phys.header.cp = cp;
|
|
/*
|
|
** Startqueue
|
|
*/
|
|
cp->phys.header.launch.l_paddr = NCB_SCRIPT_PHYS (np, select);
|
|
cp->phys.header.launch.l_cmd = SCR_JUMP;
|
|
/*
|
|
** select
|
|
*/
|
|
cp->phys.select.sel_id = xp->sc_link->target;
|
|
cp->phys.select.sel_scntl3 = tp->wval;
|
|
cp->phys.select.sel_sxfer = tp->sval;
|
|
/*
|
|
** message
|
|
*/
|
|
cp->phys.smsg.addr = CCB_PHYS (cp, scsi_smsg);
|
|
cp->phys.smsg.size = msglen;
|
|
|
|
cp->phys.smsg2.addr = CCB_PHYS (cp, scsi_smsg2);
|
|
cp->phys.smsg2.size = msglen2;
|
|
/*
|
|
** command
|
|
*/
|
|
cp->phys.cmd.addr = vtophys (cmd);
|
|
cp->phys.cmd.size = xp->cmdlen;
|
|
/*
|
|
** sense command
|
|
*/
|
|
cp->phys.scmd.addr = CCB_PHYS (cp, sensecmd);
|
|
cp->phys.scmd.size = 6;
|
|
/*
|
|
** patch requested size into sense command
|
|
*/
|
|
cp->sensecmd[0] = 0x03;
|
|
cp->sensecmd[1] = xp->sc_link->lun << 5;
|
|
cp->sensecmd[4] = sizeof(struct scsi_sense_data);
|
|
if (xp->req_sense_length)
|
|
cp->sensecmd[4] = xp->req_sense_length;
|
|
/*
|
|
** sense data
|
|
*/
|
|
cp->phys.sense.addr = vtophys (&cp->xfer->sense);
|
|
cp->phys.sense.size = sizeof(struct scsi_sense_data);
|
|
/*
|
|
** status
|
|
*/
|
|
cp->actualquirks = tp->quirks;
|
|
cp->host_status = nego ? HS_NEGOTIATE : HS_BUSY;
|
|
cp->scsi_status = S_ILLEGAL;
|
|
cp->parity_status = 0;
|
|
|
|
cp->xerr_status = XE_OK;
|
|
cp->sync_status = tp->sval;
|
|
cp->nego_status = nego;
|
|
cp->wide_status = tp->wval;
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Critical region: start this job.
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
** reselect pattern and activate this job.
|
|
*/
|
|
|
|
cp->jump_ccb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (cp->tag)));
|
|
cp->tlimit = time_second + xp->timeout / 1000 + 2;
|
|
cp->magic = CCB_MAGIC;
|
|
|
|
/*
|
|
** insert into start queue.
|
|
*/
|
|
|
|
qidx = np->squeueput + 1;
|
|
if (qidx >= MAX_START) qidx=0;
|
|
np->squeue [qidx ] = NCB_SCRIPT_PHYS (np, idle);
|
|
np->squeue [np->squeueput] = CCB_PHYS (cp, phys);
|
|
np->squeueput = qidx;
|
|
|
|
if(DEBUG_FLAGS & DEBUG_QUEUE)
|
|
printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np),
|
|
np->squeueput,
|
|
(unsigned)(np->script->startpos[0]-
|
|
(NCB_SCRIPTH_PHYS (np, tryloop))));
|
|
|
|
/*
|
|
** Script processor may be waiting for reselect.
|
|
** Wake it up.
|
|
*/
|
|
OUTB (nc_istat, SIGP);
|
|
|
|
/*
|
|
** and reenable interrupts
|
|
*/
|
|
splx (oldspl);
|
|
|
|
/*
|
|
** If interrupts are enabled, return now.
|
|
** Command is successfully queued.
|
|
*/
|
|
|
|
#ifdef __NetBSD__
|
|
if (!(flags & SCSI_POLL)) {
|
|
#else /* !__NetBSD__ */
|
|
if (!(flags & SCSI_NOMASK)) {
|
|
#endif /* __NetBSD__ */
|
|
if (np->lasttime) {
|
|
if(DEBUG_FLAGS & DEBUG_TINY) printf ("Q");
|
|
return(SUCCESSFULLY_QUEUED);
|
|
};
|
|
};
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** Interrupts not yet enabled - have to poll.
|
|
**
|
|
**----------------------------------------------------
|
|
*/
|
|
|
|
if (DEBUG_FLAGS & DEBUG_POLL) printf("P");
|
|
|
|
for (i=xp->timeout; i && !(xp->flags & ITSDONE);i--) {
|
|
if ((DEBUG_FLAGS & DEBUG_POLL) && (cp->host_status))
|
|
printf ("%c", (cp->host_status & 0xf) + '0');
|
|
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), (unsigned) INL(nc_dsp));
|
|
ncr_init (np, "timeout", HS_TIMEOUT);
|
|
};
|
|
|
|
if (!(xp->flags & ITSDONE)) {
|
|
cp-> host_status = HS_SEL_TIMEOUT;
|
|
ncr_complete (np, cp);
|
|
};
|
|
|
|
if (DEBUG_FLAGS & DEBUG_RESULT) {
|
|
printf ("%s: result: %x %x.\n",
|
|
ncr_name (np), cp->host_status, cp->scsi_status);
|
|
};
|
|
#ifdef __NetBSD__
|
|
if (!(flags & SCSI_POLL))
|
|
#else /* !__NetBSD__ */
|
|
if (!(flags & SCSI_NOMASK))
|
|
#endif /* __NetBSD__ */
|
|
return (SUCCESSFULLY_QUEUED);
|
|
switch (xp->error) {
|
|
case 0 : return (COMPLETE);
|
|
case XS_BUSY: return (TRY_AGAIN_LATER);
|
|
};
|
|
return (COMPLETE);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** 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!=CCB_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= NCB_SCRIPT_PHYS (np, idle);
|
|
|
|
/*
|
|
** timestamp
|
|
*/
|
|
ncb_profile (np, cp);
|
|
|
|
if (DEBUG_FLAGS & DEBUG_TINY)
|
|
printf ("CCB=%x STAT=%x/%x\n", (unsigned)cp & 0xfff,
|
|
cp->host_status,cp->scsi_status);
|
|
|
|
xp = cp->xfer;
|
|
cp->xfer = NULL;
|
|
tp = &np->target[xp->sc_link->target];
|
|
lp = tp->lp[xp->sc_link->lun];
|
|
|
|
/*
|
|
** We donnot queue more than 1 ccb per target
|
|
** with negotiation at any time. If this ccb was
|
|
** used for negotiation, clear this info in the tcb.
|
|
*/
|
|
|
|
if (cp == tp->nego_cp)
|
|
tp->nego_cp = 0;
|
|
|
|
/*
|
|
** Check for parity errors.
|
|
*/
|
|
|
|
if (cp->parity_status) {
|
|
PRINT_ADDR(xp);
|
|
printf ("%d parity error(s), fallback.\n", cp->parity_status);
|
|
/*
|
|
** fallback to asynch transfer.
|
|
*/
|
|
tp->usrsync=255;
|
|
tp->period = 0;
|
|
};
|
|
|
|
/*
|
|
** Check for extended errors.
|
|
*/
|
|
|
|
if (cp->xerr_status != XE_OK) {
|
|
PRINT_ADDR(xp);
|
|
switch (cp->xerr_status) {
|
|
case XE_EXTRA_DATA:
|
|
printf ("extraneous data discarded.\n");
|
|
break;
|
|
case XE_BAD_PHASE:
|
|
printf ("illegal scsi phase (4/5).\n");
|
|
break;
|
|
default:
|
|
printf ("extended error %d.\n", cp->xerr_status);
|
|
break;
|
|
};
|
|
if (cp->host_status==HS_COMPLETE)
|
|
cp->host_status = HS_FAIL;
|
|
};
|
|
|
|
/*
|
|
** Check the status.
|
|
*/
|
|
#ifdef __NetBSD__
|
|
if (xp->error != XS_NOERROR) {
|
|
|
|
/*
|
|
** Don't override the error value.
|
|
*/
|
|
} else
|
|
#endif /* __NetBSD__ */
|
|
if ( (cp->host_status == HS_COMPLETE)
|
|
&& (cp->scsi_status == S_GOOD)) {
|
|
|
|
/*
|
|
** All went well.
|
|
*/
|
|
|
|
xp->resid = 0;
|
|
|
|
/*
|
|
** if (cp->phys.header.lastp != cp->phys.header.goalp)...
|
|
**
|
|
** @RESID@
|
|
** Could dig out the correct value for resid,
|
|
** but it would be quite complicated.
|
|
**
|
|
** The ah1542.c driver sets it to 0 too ...
|
|
*/
|
|
|
|
/*
|
|
** Try to assign a ccb to this nexus
|
|
*/
|
|
ncr_alloc_ccb (np, xp->sc_link->target, xp->sc_link->lun);
|
|
|
|
/*
|
|
** On inquire cmd (0x12) save some data.
|
|
*/
|
|
if (xp->cmd->opcode == 0x12 && xp->sc_link->lun == 0) {
|
|
bcopy ( xp->data,
|
|
&tp->inqdata,
|
|
sizeof (tp->inqdata));
|
|
/*
|
|
** prepare negotiation of synch and wide.
|
|
*/
|
|
ncr_negotiate (np, tp);
|
|
|
|
/*
|
|
** force quirks update before next command start
|
|
*/
|
|
tp->quirks |= QUIRK_UPDATE;
|
|
};
|
|
|
|
/*
|
|
** Announce changes to the generic driver
|
|
*/
|
|
if (lp) {
|
|
if (lp->reqlink != lp->actlink)
|
|
ncr_opennings (np, lp, xp);
|
|
};
|
|
|
|
tp->bytes += xp->datalen;
|
|
tp->transfers ++;
|
|
#ifndef __NetBSD__
|
|
} else if (xp->flags & SCSI_ERR_OK) {
|
|
|
|
/*
|
|
** Not correct, but errors expected.
|
|
*/
|
|
xp->resid = 0;
|
|
#endif /* !__NetBSD__ */
|
|
} else if ((cp->host_status == HS_COMPLETE)
|
|
&& (cp->scsi_status == (S_SENSE|S_GOOD))) {
|
|
|
|
/*
|
|
** Check condition code
|
|
*/
|
|
xp->error = XS_SENSE;
|
|
|
|
if (DEBUG_FLAGS & (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");
|
|
};
|
|
|
|
} else if ((cp->host_status == HS_COMPLETE)
|
|
&& ((cp->scsi_status == S_BUSY)
|
|
|| (cp->scsi_status == S_CONFLICT))) {
|
|
|
|
/*
|
|
** Target is busy, or reservation conflict
|
|
*/
|
|
xp->error = XS_BUSY;
|
|
|
|
} else if (cp->host_status == HS_SEL_TIMEOUT) {
|
|
|
|
/*
|
|
** Device failed selection
|
|
*/
|
|
xp->error = XS_SELTIMEOUT;
|
|
|
|
} else if(cp->host_status == HS_TIMEOUT) {
|
|
|
|
/*
|
|
** No response
|
|
*/
|
|
xp->error = XS_TIMEOUT;
|
|
|
|
} else {
|
|
|
|
/*
|
|
** Other protocol messes
|
|
*/
|
|
PRINT_ADDR(xp);
|
|
printf ("COMMAND FAILED (%x %x) @%x.\n",
|
|
cp->host_status, cp->scsi_status, (unsigned)cp);
|
|
|
|
xp->error = XS_TIMEOUT;
|
|
}
|
|
|
|
xp->flags |= ITSDONE;
|
|
|
|
/*
|
|
** trace output
|
|
*/
|
|
|
|
if (tp->usrflag & UF_TRACE) {
|
|
u_char * p;
|
|
int i;
|
|
PRINT_ADDR(xp);
|
|
printf (" CMD:");
|
|
p = (u_char*) &xp->cmd->opcode;
|
|
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;
|
|
for (i=0; i<xp->req_sense_length; i++)
|
|
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.
|
|
*/
|
|
scsi_done (xp);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** 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:
|
|
if(DEBUG_FLAGS & DEBUG_TINY) printf ("D");
|
|
/* 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;
|
|
u_char usrwide;
|
|
|
|
/*
|
|
** Reset chip.
|
|
*/
|
|
|
|
OUTB (nc_istat, SRST);
|
|
DELAY (1000);
|
|
OUTB (nc_istat, 0);
|
|
|
|
/*
|
|
** 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] = NCB_SCRIPT_PHYS (np, idle);
|
|
|
|
/*
|
|
** Start at first entry.
|
|
*/
|
|
|
|
np->squeueput = 0;
|
|
np->script->startpos[0] = NCB_SCRIPTH_PHYS (np, tryloop);
|
|
np->script->start0 [0] = SCR_INT ^ IFFALSE (0);
|
|
|
|
/*
|
|
** Wakeup all pending jobs.
|
|
*/
|
|
|
|
ncr_wakeup (np, code);
|
|
|
|
/*
|
|
** Init chip.
|
|
*/
|
|
|
|
OUTB (nc_istat, 0x00 ); /* Remove Reset, abort ... */
|
|
OUTB (nc_scntl0, 0xca ); /* full arb., ena parity, par->ATN */
|
|
OUTB (nc_scntl1, 0x00 ); /* odd parity, and remove CRST!! */
|
|
ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
|
|
OUTB (nc_scid , RRE|np->myaddr);/* host adapter SCSI address */
|
|
OUTW (nc_respid, 1ul<<np->myaddr);/* id to respond to */
|
|
OUTB (nc_istat , SIGP ); /* Signal Process */
|
|
OUTB (nc_dmode , np->rv_dmode); /* XXX modify burstlen ??? */
|
|
OUTB (nc_dcntl , np->rv_dcntl);
|
|
OUTB (nc_ctest3, np->rv_ctest3);
|
|
OUTB (nc_ctest5, np->rv_ctest5);
|
|
OUTB (nc_ctest4, np->rv_ctest4);/* enable master parity checking */
|
|
OUTB (nc_stest2, np->rv_stest2|EXT); /* Extended Sreq/Sack filtering */
|
|
OUTB (nc_stest3, TE ); /* TolerANT enable */
|
|
OUTB (nc_stime0, 0x0b ); /* HTH = disabled, STO = 0.1 sec. */
|
|
|
|
if (bootverbose >= 2) {
|
|
printf ("\tACTUAL values:SCNTL3:%02x DMODE:%02x DCNTL:%02x\n",
|
|
np->rv_scntl3, np->rv_dmode, np->rv_dcntl);
|
|
printf ("\t CTEST3:%02x CTEST4:%02x CTEST5:%02x\n",
|
|
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
|
|
}
|
|
|
|
/*
|
|
** Enable GPIO0 pin for writing if LED support.
|
|
*/
|
|
|
|
if (np->features & FE_LED0) {
|
|
OUTOFFB (nc_gpcntl, 0x01);
|
|
}
|
|
|
|
/*
|
|
** Reinitialize usrsync.
|
|
** Have to renegotiate synch mode.
|
|
*/
|
|
|
|
usrsync = 255;
|
|
if (SCSI_NCR_DFLT_SYNC) {
|
|
usrsync = SCSI_NCR_DFLT_SYNC;
|
|
if (usrsync > np->maxsync)
|
|
usrsync = np->maxsync;
|
|
if (usrsync < np->minsync)
|
|
usrsync = np->minsync;
|
|
};
|
|
|
|
/*
|
|
** Reinitialize usrwide.
|
|
** Have to renegotiate wide mode.
|
|
*/
|
|
|
|
usrwide = (SCSI_NCR_MAX_WIDE);
|
|
if (usrwide > np->maxwide) usrwide=np->maxwide;
|
|
|
|
/*
|
|
** Disable disconnects.
|
|
*/
|
|
|
|
np->disc = 0;
|
|
|
|
/*
|
|
** Fill in target structure.
|
|
*/
|
|
|
|
for (i=0;i<MAX_TARGET;i++) {
|
|
tcb_p tp = &np->target[i];
|
|
|
|
tp->sval = 0;
|
|
tp->wval = np->rv_scntl3;
|
|
|
|
tp->usrsync = usrsync;
|
|
tp->usrwide = usrwide;
|
|
|
|
ncr_negotiate (np, tp);
|
|
}
|
|
|
|
/*
|
|
** 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, NCB_SCRIPT_PHYS (np, start));
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
** Prepare the negotiation values for wide and
|
|
** synchronous transfers.
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_negotiate (struct ncb* np, struct tcb* tp)
|
|
{
|
|
/*
|
|
** minsync unit is 4ns !
|
|
*/
|
|
|
|
u_long minsync = tp->usrsync;
|
|
|
|
/*
|
|
** if not scsi 2
|
|
** don't believe FAST!
|
|
*/
|
|
|
|
if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2)
|
|
minsync=50;
|
|
|
|
/*
|
|
** our limit ..
|
|
*/
|
|
|
|
if (minsync < np->minsync)
|
|
minsync = np->minsync;
|
|
|
|
/*
|
|
** divider limit
|
|
*/
|
|
|
|
if (minsync > np->maxsync)
|
|
minsync = 255;
|
|
|
|
tp->minsync = minsync;
|
|
tp->maxoffs = (minsync<255 ? np->maxoffs : 0);
|
|
|
|
/*
|
|
** period=0: has to negotiate sync transfer
|
|
*/
|
|
|
|
tp->period=0;
|
|
|
|
/*
|
|
** widedone=0: has to negotiate wide transfer
|
|
*/
|
|
tp->widedone=0;
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
** Get clock factor and sync divisor for a given
|
|
** synchronous factor period.
|
|
** Returns the clock factor (in sxfer) and scntl3
|
|
** synchronous divisor field.
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_getsync(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p)
|
|
{
|
|
u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
|
|
int div = np->clock_divn; /* Number of divisors supported */
|
|
u_long fak; /* Sync factor in sxfer */
|
|
u_long per; /* Period in tenths of ns */
|
|
u_long kpc; /* (per * clk) */
|
|
|
|
/*
|
|
** Compute the synchronous period in tenths of nano-seconds
|
|
*/
|
|
if (sfac <= 10) per = 250;
|
|
else if (sfac == 11) per = 303;
|
|
else if (sfac == 12) per = 500;
|
|
else per = 40 * sfac;
|
|
|
|
/*
|
|
** Look for the greatest clock divisor that allows an
|
|
** input speed faster than the period.
|
|
*/
|
|
kpc = per * clk;
|
|
while (--div >= 0)
|
|
if (kpc >= (div_10M[div] * 4)) break;
|
|
|
|
/*
|
|
** Calculate the lowest clock factor that allows an output
|
|
** speed not faster than the period.
|
|
*/
|
|
fak = (kpc - 1) / div_10M[div] + 1;
|
|
|
|
#if 0 /* You can #if 1 if you think this optimization is usefull */
|
|
|
|
per = (fak * div_10M[div]) / clk;
|
|
|
|
/*
|
|
** Why not to try the immediate lower divisor and to choose
|
|
** the one that allows the fastest output speed ?
|
|
** We dont want input speed too much greater than output speed.
|
|
*/
|
|
if (div >= 1 && fak < 6) {
|
|
u_long fak2, per2;
|
|
fak2 = (kpc - 1) / div_10M[div-1] + 1;
|
|
per2 = (fak2 * div_10M[div-1]) / clk;
|
|
if (per2 < per && fak2 <= 6) {
|
|
fak = fak2;
|
|
per = per2;
|
|
--div;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (fak < 4) fak = 4; /* Should never happen, too bad ... */
|
|
|
|
/*
|
|
** Compute and return sync parameters for the ncr
|
|
*/
|
|
*fakp = fak - 4;
|
|
*scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
** Switch sync mode for current job and its target
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer)
|
|
{
|
|
struct scsi_xfer *xp;
|
|
tcb_p tp;
|
|
int div;
|
|
u_char target = INB (nc_ctest0) & 0x0f;
|
|
|
|
assert (cp);
|
|
if (!cp) return;
|
|
|
|
xp = cp->xfer;
|
|
assert (xp);
|
|
if (!xp) return;
|
|
assert (target == (xp->sc_link->target & 0x0f));
|
|
|
|
tp = &np->target[target];
|
|
|
|
if (!scntl3 || !(sxfer & 0x1f))
|
|
scntl3 = np->rv_scntl3;
|
|
scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
|
|
|
|
/*
|
|
** Deduce the value of controller sync period from scntl3.
|
|
** period is in tenths of nano-seconds.
|
|
*/
|
|
|
|
div = ((scntl3 >> 4) & 0x7);
|
|
if ((sxfer & 0x1f) && div)
|
|
tp->period = (((sxfer>>5)+4)*div_10M[div-1])/np->clock_khz;
|
|
else
|
|
tp->period = 0xffff;
|
|
|
|
/*
|
|
** Stop there if sync parameters are unchanged
|
|
*/
|
|
|
|
if (tp->sval == sxfer && tp->wval == scntl3) return;
|
|
tp->sval = sxfer;
|
|
tp->wval = scntl3;
|
|
|
|
/*
|
|
** Bells and whistles ;-)
|
|
*/
|
|
PRINT_ADDR(xp);
|
|
if (sxfer & 0x1f) {
|
|
unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
|
|
unsigned mb10 = (f10 + tp->period/2) / tp->period;
|
|
/*
|
|
** Disable extended Sreq/Sack filtering
|
|
*/
|
|
if (tp->period <= 2000) OUTOFFB (nc_stest2, EXT);
|
|
printf ("%d.%d MB/s (%d ns, offset %d)\n",
|
|
mb10 / 10, mb10 % 10, tp->period / 10, sxfer & 0x1f);
|
|
} else printf ("asynchronous.\n");
|
|
|
|
/*
|
|
** set actual value and sync_status
|
|
*/
|
|
OUTB (nc_sxfer, sxfer);
|
|
np->sync_st = sxfer;
|
|
OUTB (nc_scntl3, scntl3);
|
|
np->wide_st = scntl3;
|
|
|
|
/*
|
|
** patch ALL ccbs of this target.
|
|
*/
|
|
for (cp = np->ccb; cp; cp = cp->link_ccb) {
|
|
if (!cp->xfer) continue;
|
|
if (cp->xfer->sc_link->target != target) continue;
|
|
cp->sync_status = sxfer;
|
|
cp->wide_status = scntl3;
|
|
};
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
** Switch wide mode for current job and its target
|
|
** SCSI specs say: a SCSI device that accepts a WDTR
|
|
** message shall reset the synchronous agreement to
|
|
** asynchronous mode.
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack)
|
|
{
|
|
struct scsi_xfer *xp;
|
|
u_short target = INB (nc_ctest0) & 0x0f;
|
|
tcb_p tp;
|
|
u_char scntl3;
|
|
u_char sxfer;
|
|
|
|
assert (cp);
|
|
if (!cp) return;
|
|
|
|
xp = cp->xfer;
|
|
assert (xp);
|
|
if (!xp) return;
|
|
assert (target == (xp->sc_link->target & 0x0f));
|
|
|
|
tp = &np->target[target];
|
|
tp->widedone = wide+1;
|
|
scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
|
|
|
|
sxfer = ack ? 0 : tp->sval;
|
|
|
|
/*
|
|
** Stop there if sync/wide parameters are unchanged
|
|
*/
|
|
if (tp->sval == sxfer && tp->wval == scntl3) return;
|
|
tp->sval = sxfer;
|
|
tp->wval = scntl3;
|
|
|
|
/*
|
|
** Bells and whistles ;-)
|
|
*/
|
|
PRINT_ADDR(xp);
|
|
if (scntl3 & EWS)
|
|
printf ("WIDE SCSI (16 bit) enabled");
|
|
else
|
|
printf ("WIDE SCSI disabled");
|
|
|
|
/*
|
|
** set actual value and sync_status
|
|
*/
|
|
OUTB (nc_sxfer, sxfer);
|
|
np->sync_st = sxfer;
|
|
OUTB (nc_scntl3, scntl3);
|
|
np->wide_st = scntl3;
|
|
|
|
/*
|
|
** patch ALL ccbs of this target.
|
|
*/
|
|
for (cp = np->ccb; cp; cp = cp->link_ccb) {
|
|
if (!cp->xfer) continue;
|
|
if (cp->xfer->sc_link->target != target) continue;
|
|
cp->sync_status = sxfer;
|
|
cp->wide_status = scntl3;
|
|
};
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
** Switch tagged mode for a target.
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_setmaxtags (tcb_p tp, u_long usrtags)
|
|
{
|
|
int l;
|
|
for (l=0; l<MAX_LUN; l++) {
|
|
lcb_p lp;
|
|
if (!tp) break;
|
|
lp=tp->lp[l];
|
|
if (!lp) continue;
|
|
ncr_settags (tp, lp, usrtags);
|
|
};
|
|
}
|
|
|
|
static void ncr_settags (tcb_p tp, lcb_p lp, u_long usrtags)
|
|
{
|
|
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[0] & 0x1f) != 0x00
|
|
|| (tp->inqdata[7] & INQ7_QUEUE) == 0
|
|
|| (tp->quirks & QUIRK_NOTAGS) != 0) {
|
|
usrtags=0;
|
|
}
|
|
if (usrtags) {
|
|
reqtags = 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;
|
|
if (lp->reqlink < lp->reqccbs)
|
|
lp->reqlink = lp->reqccbs;
|
|
}
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** 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;
|
|
ncr_negotiate (np, tp);
|
|
};
|
|
break;
|
|
|
|
case UC_SETTAGS:
|
|
if (np->user.data > MAX_TAGS)
|
|
break;
|
|
for (t=0; t<MAX_TARGET; t++) {
|
|
if (!((np->user.target>>t)&1)) continue;
|
|
tp = &np->target[t];
|
|
tp->usrtags = np->user.data;
|
|
ncr_setmaxtags (tp, tp->usrtags);
|
|
};
|
|
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++) {
|
|
u_long size;
|
|
if (!((np->user.target>>t)&1)) continue;
|
|
tp = &np->target[t];
|
|
size = np->user.data;
|
|
if (size > np->maxwide) size=np->maxwide;
|
|
tp->usrwide = size;
|
|
ncr_negotiate (np, tp);
|
|
};
|
|
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 (void *arg)
|
|
{
|
|
ncb_p np = arg;
|
|
u_long thistime = time_second;
|
|
u_long step = np->ticks;
|
|
u_long count = 0;
|
|
long signed t;
|
|
ccb_p cp;
|
|
|
|
if (np->lasttime != thistime) {
|
|
/*
|
|
** block ncr interrupts
|
|
*/
|
|
int oldspl = splbio();
|
|
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 try to wake it up.
|
|
*/
|
|
OUTB (nc_istat, SIGP);
|
|
};
|
|
|
|
/*----------------------------------------------------
|
|
**
|
|
** 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 ==
|
|
NCB_SCRIPT_PHYS (np, select)) {
|
|
printf ("%s: timeout ccb=%x (skip)\n",
|
|
ncr_name (np), (unsigned)cp);
|
|
cp->phys.header.launch.l_paddr
|
|
= NCB_SCRIPT_PHYS (np, skip);
|
|
};
|
|
|
|
switch (cp->host_status) {
|
|
|
|
case HS_BUSY:
|
|
case HS_NEGOTIATE:
|
|
/*
|
|
** still in start queue ?
|
|
*/
|
|
if (cp->phys.header.launch.l_paddr ==
|
|
NCB_SCRIPT_PHYS (np, skip))
|
|
continue;
|
|
|
|
/* fall through */
|
|
case HS_DISCONNECT:
|
|
cp->host_status=HS_TIMEOUT;
|
|
};
|
|
cp->tag = 0;
|
|
|
|
/*
|
|
** wakeup this ccb.
|
|
*/
|
|
ncr_complete (np, cp);
|
|
};
|
|
splx (oldspl);
|
|
}
|
|
|
|
np->timeout_ch = timeout (ncr_timeout, (caddr_t) np, step ? step : 1);
|
|
|
|
if (INB(nc_istat) & (INTF|SIP|DIP)) {
|
|
|
|
/*
|
|
** Process pending interrupts.
|
|
*/
|
|
|
|
int oldspl = splbio ();
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("{");
|
|
ncr_exception (np);
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("}");
|
|
splx (oldspl);
|
|
};
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
** log message for real hard errors
|
|
**
|
|
** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
|
|
** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
|
|
**
|
|
** exception register:
|
|
** ds: dstat
|
|
** si: sist
|
|
**
|
|
** SCSI bus lines:
|
|
** so: control lines as driver by NCR.
|
|
** si: control lines as seen by NCR.
|
|
** sd: scsi data lines as seen by NCR.
|
|
**
|
|
** wide/fastmode:
|
|
** sxfer: (see the manual)
|
|
** scntl3: (see the manual)
|
|
**
|
|
** current script command:
|
|
** dsp: script adress (relative to start of script).
|
|
** dbc: first word of script command.
|
|
**
|
|
** First 16 register of the chip:
|
|
** r0..rf
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static void ncr_log_hard_error(ncb_p np, u_short sist, u_char dstat)
|
|
{
|
|
u_int32_t dsp;
|
|
int script_ofs;
|
|
int script_size;
|
|
char *script_name;
|
|
u_char *script_base;
|
|
int i;
|
|
|
|
dsp = INL (nc_dsp);
|
|
|
|
if (np->p_script < dsp &&
|
|
dsp <= np->p_script + sizeof(struct script)) {
|
|
script_ofs = dsp - np->p_script;
|
|
script_size = sizeof(struct script);
|
|
script_base = (u_char *) np->script;
|
|
script_name = "script";
|
|
}
|
|
else if (np->p_scripth < dsp &&
|
|
dsp <= np->p_scripth + sizeof(struct scripth)) {
|
|
script_ofs = dsp - np->p_scripth;
|
|
script_size = sizeof(struct scripth);
|
|
script_base = (u_char *) np->scripth;
|
|
script_name = "scripth";
|
|
} else {
|
|
script_ofs = dsp;
|
|
script_size = 0;
|
|
script_base = 0;
|
|
script_name = "mem";
|
|
}
|
|
|
|
printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
|
|
ncr_name (np), (unsigned)INB (nc_ctest0)&0x0f, dstat, sist,
|
|
(unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
|
|
(unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
|
|
(unsigned)INL (nc_dbc));
|
|
|
|
if (((script_ofs & 3) == 0) &&
|
|
(unsigned)script_ofs < script_size) {
|
|
printf ("%s: script cmd = %08x\n", ncr_name(np),
|
|
(int) *(ncrcmd *)(script_base + script_ofs));
|
|
}
|
|
|
|
printf ("%s: regdump:", ncr_name(np));
|
|
for (i=0; i<16;i++)
|
|
printf (" %02x", (unsigned)INB_OFF(i));
|
|
printf (".\n");
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** ncr chip exception handler.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
void ncr_exception (ncb_p np)
|
|
{
|
|
u_char istat, dstat;
|
|
u_short sist;
|
|
|
|
/*
|
|
** interrupt on the fly ?
|
|
*/
|
|
while ((istat = INB (nc_istat)) & INTF) {
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("F ");
|
|
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.
|
|
*/
|
|
|
|
sist = (istat & SIP) ? INW (nc_sist) : 0;
|
|
dstat = (istat & DIP) ? INB (nc_dstat) : 0;
|
|
np->profile.num_int++;
|
|
|
|
if (DEBUG_FLAGS & DEBUG_TINY)
|
|
printf ("<%d|%x:%x|%x:%x>",
|
|
INB(nc_scr0),
|
|
dstat,sist,
|
|
(unsigned)INL(nc_dsp),
|
|
(unsigned)INL(nc_dbc));
|
|
if ((dstat==DFE) && (sist==PAR)) return;
|
|
|
|
/*==========================================================
|
|
**
|
|
** First the normal cases.
|
|
**
|
|
**==========================================================
|
|
*/
|
|
/*-------------------------------------------
|
|
** SCSI reset
|
|
**-------------------------------------------
|
|
*/
|
|
|
|
if (sist & RST) {
|
|
ncr_init (np, bootverbose ? "scsi reset" : NULL, 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, dstat);
|
|
return;
|
|
};
|
|
|
|
/*----------------------------------------
|
|
** move command with length 0
|
|
**----------------------------------------
|
|
*/
|
|
|
|
if ((dstat & IID) &&
|
|
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
|
!(dstat & (MDPE|BF|ABRT|SIR)) &&
|
|
((INL(nc_dbc) & 0xf8000000) == SCR_MOVE_TBL)) {
|
|
/*
|
|
** Target wants more data than available.
|
|
** The "no_data" script will do it.
|
|
*/
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, no_data));
|
|
return;
|
|
};
|
|
|
|
/*-------------------------------------------
|
|
** Programmed interrupt
|
|
**-------------------------------------------
|
|
*/
|
|
|
|
if ((dstat & SIR) &&
|
|
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
|
!(dstat & (MDPE|BF|ABRT|IID)) &&
|
|
(INB(nc_dsps) <= SIR_MAX)) {
|
|
ncr_int_sir (np);
|
|
return;
|
|
};
|
|
|
|
/*========================================
|
|
** log message for real hard errors
|
|
**========================================
|
|
*/
|
|
|
|
ncr_log_hard_error(np, sist, dstat);
|
|
|
|
/*========================================
|
|
** do the register dump
|
|
**========================================
|
|
*/
|
|
|
|
if (time_second - np->regtime.tv_sec>10) {
|
|
int i;
|
|
getmicrotime(&np->regtime);
|
|
for (i=0; i<sizeof(np->regdump); i++)
|
|
((char*)&np->regdump)[i] = INB_OFF(i);
|
|
np->regdump.nc_dstat = dstat;
|
|
np->regdump.nc_sist = sist;
|
|
};
|
|
|
|
|
|
/*----------------------------------------
|
|
** clean up the dma fifo
|
|
**----------------------------------------
|
|
*/
|
|
|
|
if ( (INB(nc_sstat0) & (ILF|ORF|OLF) ) ||
|
|
(INB(nc_sstat1) & (FF3210) ) ||
|
|
(INB(nc_sstat2) & (ILF1|ORF1|OLF1)) || /* wide .. */
|
|
!(dstat & DFE)) {
|
|
printf ("%s: have to clear fifos.\n", ncr_name (np));
|
|
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
|
|
OUTB (nc_ctest3, np->rv_ctest3 | CLF);
|
|
/* clear dma fifo */
|
|
}
|
|
|
|
/*----------------------------------------
|
|
** handshake timeout
|
|
**----------------------------------------
|
|
*/
|
|
|
|
if (sist & HTH) {
|
|
printf ("%s: handshake timeout\n", ncr_name(np));
|
|
OUTB (nc_scntl1, CRST);
|
|
DELAY (1000);
|
|
OUTB (nc_scntl1, 0x00);
|
|
OUTB (nc_scr0, HS_FAIL);
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup));
|
|
return;
|
|
}
|
|
|
|
/*----------------------------------------
|
|
** 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, NCB_SCRIPT_PHYS (np, 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) == SCR_WAIT_DISC)) {
|
|
/*
|
|
** Unexpected data cycle while waiting for disconnect.
|
|
*/
|
|
if (INB(nc_sstat2) & LDSC) {
|
|
/*
|
|
** It's an early reconnect.
|
|
** Let's continue ...
|
|
*/
|
|
OUTB (nc_dcntl, np->rv_dcntl | STD);
|
|
/*
|
|
** info message
|
|
*/
|
|
printf ("%s: INFO: LDSC while IID.\n",
|
|
ncr_name (np));
|
|
return;
|
|
};
|
|
printf ("%s: target %d doesn't release the bus.\n",
|
|
ncr_name (np), INB (nc_ctest0)&0x0f);
|
|
/*
|
|
** return without restarting the NCR.
|
|
** timeout will do the real work.
|
|
*/
|
|
return;
|
|
};
|
|
|
|
/*----------------------------------------
|
|
** single step
|
|
**----------------------------------------
|
|
*/
|
|
|
|
if ((dstat & SSI) &&
|
|
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
|
|
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
|
|
OUTB (nc_dcntl, np->rv_dcntl | STD);
|
|
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 switched on or off while the driver is running.
|
|
*/
|
|
|
|
if (sist & SGE) {
|
|
/* clear scsi offsets */
|
|
OUTB (nc_ctest3, np->rv_ctest3 | CLF);
|
|
}
|
|
|
|
/*
|
|
** Freeze controller to be able to read the messages.
|
|
*/
|
|
|
|
if (DEBUG_FLAGS & 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 (ncr_timeout, (caddr_t) np, np->timeout_ch);
|
|
|
|
printf ("%s: halted!\n", ncr_name(np));
|
|
/*
|
|
** don't restart controller ...
|
|
*/
|
|
OUTB (nc_istat, SRST);
|
|
return;
|
|
};
|
|
|
|
#ifdef NCR_FREEZE
|
|
/*
|
|
** Freeze system to be able to read the messages.
|
|
*/
|
|
printf ("ncr: fatal error: system halted - press reset to reboot ...");
|
|
(void) splhigh();
|
|
for (;;);
|
|
#endif
|
|
|
|
/*
|
|
** 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-Interrupt 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;
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("T");
|
|
|
|
/*
|
|
** look for ccb and set the status.
|
|
*/
|
|
|
|
dsa = INL (nc_dsa);
|
|
cp = np->ccb;
|
|
while (cp && (CCB_PHYS (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 - NCB_SCRIPTH_PHYS (np, tryloop);
|
|
|
|
/* assert ((diff <= MAX_START * 20) && !(diff % 20));*/
|
|
|
|
if ((diff <= MAX_START * 20) && !(diff % 20)) {
|
|
np->script->startpos[0] = scratcha;
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, 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_char dstat)
|
|
{
|
|
u_int32_t dbc;
|
|
u_int32_t rest;
|
|
u_int32_t dsa;
|
|
u_int32_t dsp;
|
|
u_int32_t nxtdsp;
|
|
u_int32_t *vdsp;
|
|
u_int32_t oadr, olen;
|
|
u_int32_t *tblp, *newcmd;
|
|
u_char cmd, sbcl, ss0, ss2, ctest5;
|
|
u_short delta;
|
|
ccb_p cp;
|
|
|
|
dsp = INL (nc_dsp);
|
|
dsa = INL (nc_dsa);
|
|
dbc = INL (nc_dbc);
|
|
ss0 = INB (nc_sstat0);
|
|
ss2 = INB (nc_sstat2);
|
|
sbcl= INB (nc_sbcl);
|
|
|
|
cmd = dbc >> 24;
|
|
rest= dbc & 0xffffff;
|
|
|
|
ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
|
|
if (ctest5 & DFS)
|
|
delta=(((ctest5<<8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
|
|
else
|
|
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.
|
|
** Check the sstat2 register in case of wide transfer.
|
|
*/
|
|
|
|
if (!(dstat & DFE)) rest += delta;
|
|
if (ss0 & OLF) rest++;
|
|
if (ss0 & ORF) rest++;
|
|
if (INB(nc_scntl3) & EWS) {
|
|
if (ss2 & OLF1) rest++;
|
|
if (ss2 & ORF1) rest++;
|
|
};
|
|
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
|
|
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
|
|
|
|
/*
|
|
** locate matching cp
|
|
*/
|
|
dsa = INL (nc_dsa);
|
|
cp = np->ccb;
|
|
while (cp && (CCB_PHYS (cp, phys) != dsa))
|
|
cp = cp->link_ccb;
|
|
|
|
if (!cp) {
|
|
printf ("%s: SCSI phase error fixup: CCB already dequeued (0x%08lx)\n",
|
|
ncr_name (np), (u_long) np->header.cp);
|
|
return;
|
|
}
|
|
if (cp != np->header.cp) {
|
|
printf ("%s: SCSI phase error fixup: CCB address mismatch (0x%08lx != 0x%08lx) np->ccb = 0x%08lx\n",
|
|
ncr_name (np), (u_long) cp, (u_long) np->header.cp, np->ccb);
|
|
/* return;*/
|
|
}
|
|
|
|
/*
|
|
** find the interrupted script command,
|
|
** and the address at which 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 if (dsp > np->p_script &&
|
|
dsp <= np->p_script + sizeof(struct script)) {
|
|
vdsp = (u_int32_t *) ((char*)np->script - np->p_script + dsp-8);
|
|
nxtdsp = dsp;
|
|
} else {
|
|
vdsp = (u_int32_t *) ((char*)np->scripth - np->p_scripth+dsp-8);
|
|
nxtdsp = dsp;
|
|
};
|
|
|
|
/*
|
|
** log the information
|
|
*/
|
|
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) {
|
|
printf ("P%x%x ",cmd&7, sbcl&7);
|
|
printf ("RL=%d D=%d SS0=%x ",
|
|
(unsigned) rest, (unsigned) delta, ss0);
|
|
};
|
|
if (DEBUG_FLAGS & DEBUG_PHASE) {
|
|
printf ("\nCP=%x CP2=%x DSP=%x NXT=%x VDSP=%x CMD=%x ",
|
|
(unsigned)cp, (unsigned)np->header.cp,
|
|
(unsigned)dsp,
|
|
(unsigned)nxtdsp, (unsigned)vdsp, cmd);
|
|
};
|
|
|
|
/*
|
|
** get old startaddress and old length.
|
|
*/
|
|
|
|
oadr = vdsp[1];
|
|
|
|
if (cmd & 0x10) { /* Table indirect */
|
|
tblp = (u_int32_t *) ((char*) &cp->phys + oadr);
|
|
olen = tblp[0];
|
|
oadr = tblp[1];
|
|
} else {
|
|
tblp = (u_int32_t *) 0;
|
|
olen = vdsp[0] & 0xffffff;
|
|
};
|
|
|
|
if (DEBUG_FLAGS & DEBUG_PHASE) {
|
|
printf ("OCMD=%x\nTBLP=%x OLEN=%x OADR=%x\n",
|
|
(unsigned) (vdsp[0] >> 24),
|
|
(unsigned) tblp,
|
|
(unsigned) olen,
|
|
(unsigned) oadr);
|
|
};
|
|
|
|
/*
|
|
** if old phase not dataphase, leave here.
|
|
*/
|
|
|
|
if (cmd != (vdsp[0] >> 24)) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
|
|
(unsigned)cmd, (unsigned)vdsp[0] >> 24);
|
|
|
|
return;
|
|
}
|
|
if (cmd & 0x06) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("phase change %x-%x %d@%08x resid=%d.\n",
|
|
cmd&7, sbcl&7, (unsigned)olen,
|
|
(unsigned)oadr, (unsigned)rest);
|
|
|
|
OUTB (nc_dcntl, np->rv_dcntl | STD);
|
|
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;
|
|
|
|
if (DEBUG_FLAGS & DEBUG_PHASE) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("newcmd[%d] %x %x %x %x.\n",
|
|
newcmd - cp->patch,
|
|
(unsigned)newcmd[0],
|
|
(unsigned)newcmd[1],
|
|
(unsigned)newcmd[2],
|
|
(unsigned)newcmd[3]);
|
|
}
|
|
/*
|
|
** fake the return address (to the patch).
|
|
** and restart script processor at dispatcher.
|
|
*/
|
|
np->profile.num_break++;
|
|
OUTL (nc_temp, vtophys (newcmd));
|
|
if ((cmd & 7) == 0)
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
|
|
else
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, checkatn));
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** ncr chip exception handler for programmed interrupts.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
static int 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]);
|
|
};
|
|
return (i+1);
|
|
} else if ((*msg & 0xf0) == 0x20) {
|
|
printf ("-%x",msg[1]);
|
|
return (2);
|
|
};
|
|
return (1);
|
|
}
|
|
|
|
void ncr_int_sir (ncb_p np)
|
|
{
|
|
u_char scntl3;
|
|
u_char chg, ofs, per, fak, wide;
|
|
u_char num = INB (nc_dsps);
|
|
ccb_p cp=0;
|
|
u_long dsa;
|
|
u_char target = INB (nc_ctest0) & 0x0f;
|
|
tcb_p tp = &np->target[target];
|
|
int i;
|
|
if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num);
|
|
|
|
switch (num) {
|
|
case SIR_SENSE_RESTART:
|
|
case SIR_STALL_RESTART:
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
** lookup the ccb
|
|
*/
|
|
dsa = INL (nc_dsa);
|
|
cp = np->ccb;
|
|
while (cp && (CCB_PHYS (cp, phys) != dsa))
|
|
cp = cp->link_ccb;
|
|
|
|
assert (cp);
|
|
if (!cp)
|
|
goto out;
|
|
assert (cp == np->header.cp);
|
|
if (cp != np->header.cp)
|
|
goto out;
|
|
}
|
|
|
|
switch (num) {
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Processing of interrupted getcc selects
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
case SIR_SENSE_RESTART:
|
|
/*------------------------------------------
|
|
** Script processor is idle.
|
|
** Look for interrupted "check cond"
|
|
**------------------------------------------
|
|
*/
|
|
|
|
if (DEBUG_FLAGS & DEBUG_RESTART)
|
|
printf ("%s: int#%d",ncr_name (np),num);
|
|
cp = (ccb_p) 0;
|
|
for (i=0; i<MAX_TARGET; i++) {
|
|
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" t%d", i);
|
|
tp = &np->target[i];
|
|
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
|
|
cp = tp->hold_cp;
|
|
if (!cp) continue;
|
|
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
|
|
if ((cp->host_status==HS_BUSY) &&
|
|
(cp->scsi_status==S_CHECK_COND))
|
|
break;
|
|
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("- (remove)");
|
|
tp->hold_cp = cp = (ccb_p) 0;
|
|
};
|
|
|
|
if (cp) {
|
|
if (DEBUG_FLAGS & DEBUG_RESTART)
|
|
printf ("+ restart job ..\n");
|
|
OUTL (nc_dsa, CCB_PHYS (cp, phys));
|
|
OUTL (nc_dsp, NCB_SCRIPTH_PHYS (np, getcc));
|
|
return;
|
|
};
|
|
|
|
/*
|
|
** no job, resume normal processing
|
|
*/
|
|
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" -- remove trap\n");
|
|
np->script->start0[0] = SCR_INT ^ IFFALSE (0);
|
|
break;
|
|
|
|
case SIR_SENSE_FAILED:
|
|
/*-------------------------------------------
|
|
** While trying to select for
|
|
** getting the condition code,
|
|
** a target reselected us.
|
|
**-------------------------------------------
|
|
*/
|
|
if (DEBUG_FLAGS & DEBUG_RESTART) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("in getcc reselect by t%d.\n",
|
|
INB(nc_ssid) & 0x0f);
|
|
}
|
|
|
|
/*
|
|
** Mark this job
|
|
*/
|
|
cp->host_status = HS_BUSY;
|
|
cp->scsi_status = S_CHECK_COND;
|
|
np->target[cp->xfer->sc_link->target].hold_cp = cp;
|
|
|
|
/*
|
|
** And patch code to restart it.
|
|
*/
|
|
np->script->start0[0] = SCR_INT;
|
|
break;
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
**
|
|
** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
|
|
**
|
|
** We try to negotiate sync and wide transfer only after
|
|
** a successfull inquire command. We look at byte 7 of the
|
|
** inquire data to determine the capabilities if the target.
|
|
**
|
|
** When we try to negotiate, we append the negotiation message
|
|
** to the identify and (maybe) simple tag message.
|
|
** The host status field is set to HS_NEGOTIATE to mark this
|
|
** situation.
|
|
**
|
|
** If the target doesn't answer this message immidiately
|
|
** (as required by the standard), the SIR_NEGO_FAIL interrupt
|
|
** will be raised eventually.
|
|
** The handler removes the HS_NEGOTIATE status, and sets the
|
|
** negotiated value to the default (async / nowide).
|
|
**
|
|
** If we receive a matching answer immediately, we check it
|
|
** for validity, and set the values.
|
|
**
|
|
** If we receive a Reject message immediately, we assume the
|
|
** negotiation has failed, and fall back to standard values.
|
|
**
|
|
** If we receive a negotiation message while not in HS_NEGOTIATE
|
|
** state, it's a target initiated negotiation. We prepare a
|
|
** (hopefully) valid answer, set our parameters, and send back
|
|
** this answer to the target.
|
|
**
|
|
** If the target doesn't fetch the answer (no message out phase),
|
|
** we assume the negotiation has failed, and fall back to default
|
|
** settings.
|
|
**
|
|
** When we set the values, we adjust them in all ccbs belonging
|
|
** to this target, in the controller's register, and in the "phys"
|
|
** field of the controller's struct ncb.
|
|
**
|
|
** Possible cases: hs sir msg_in value send goto
|
|
** We try try to negotiate:
|
|
** -> target doesnt't msgin NEG FAIL noop defa. - dispatch
|
|
** -> target rejected our msg NEG FAIL reject defa. - dispatch
|
|
** -> target answered (ok) NEG SYNC sdtr set - clrack
|
|
** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
|
|
** -> target answered (ok) NEG WIDE wdtr set - clrack
|
|
** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
|
|
** -> any other msgin NEG FAIL noop defa. - dispatch
|
|
**
|
|
** Target tries to negotiate:
|
|
** -> incoming message --- SYNC sdtr set SDTR -
|
|
** -> incoming message --- WIDE wdtr set WDTR -
|
|
** We sent our answer:
|
|
** -> target doesn't msgout --- PROTO ? defa. - dispatch
|
|
**
|
|
**-----------------------------------------------------------------------------
|
|
*/
|
|
|
|
case SIR_NEGO_FAILED:
|
|
/*-------------------------------------------------------
|
|
**
|
|
** Negotiation failed.
|
|
** Target doesn't send an answer message,
|
|
** or target rejected our message.
|
|
**
|
|
** Remove negotiation request.
|
|
**
|
|
**-------------------------------------------------------
|
|
*/
|
|
OUTB (HS_PRT, HS_BUSY);
|
|
|
|
/* fall through */
|
|
|
|
case SIR_NEGO_PROTO:
|
|
/*-------------------------------------------------------
|
|
**
|
|
** Negotiation failed.
|
|
** Target doesn't fetch the answer message.
|
|
**
|
|
**-------------------------------------------------------
|
|
*/
|
|
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("negotiation failed sir=%x status=%x.\n",
|
|
num, cp->nego_status);
|
|
};
|
|
|
|
/*
|
|
** any error in negotiation:
|
|
** fall back to default mode.
|
|
*/
|
|
switch (cp->nego_status) {
|
|
|
|
case NS_SYNC:
|
|
ncr_setsync (np, cp, 0, 0xe0);
|
|
break;
|
|
|
|
case NS_WIDE:
|
|
ncr_setwide (np, cp, 0, 0);
|
|
break;
|
|
|
|
};
|
|
np->msgin [0] = M_NOOP;
|
|
np->msgout[0] = M_NOOP;
|
|
cp->nego_status = 0;
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
|
|
break;
|
|
|
|
case SIR_NEGO_SYNC:
|
|
/*
|
|
** Synchronous request message received.
|
|
*/
|
|
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("sync msgin: ");
|
|
(void) ncr_show_msg (np->msgin);
|
|
printf (".\n");
|
|
};
|
|
|
|
/*
|
|
** get requested values.
|
|
*/
|
|
|
|
chg = 0;
|
|
per = np->msgin[3];
|
|
ofs = np->msgin[4];
|
|
if (ofs==0) per=255;
|
|
|
|
/*
|
|
** if target sends SDTR message,
|
|
** it CAN transfer synch.
|
|
*/
|
|
|
|
if (ofs)
|
|
tp->inqdata[7] |= INQ7_SYNC;
|
|
|
|
/*
|
|
** check values against driver limits.
|
|
*/
|
|
|
|
if (per < np->minsync)
|
|
{chg = 1; per = np->minsync;}
|
|
if (per < tp->minsync)
|
|
{chg = 1; per = tp->minsync;}
|
|
if (ofs > tp->maxoffs)
|
|
{chg = 1; ofs = tp->maxoffs;}
|
|
|
|
/*
|
|
** Check against controller limits.
|
|
*/
|
|
|
|
fak = 7;
|
|
scntl3 = 0;
|
|
if (ofs != 0) {
|
|
ncr_getsync(np, per, &fak, &scntl3);
|
|
if (fak > 7) {
|
|
chg = 1;
|
|
ofs = 0;
|
|
}
|
|
}
|
|
if (ofs == 0) {
|
|
fak = 7;
|
|
per = 0;
|
|
scntl3 = 0;
|
|
tp->minsync = 0;
|
|
}
|
|
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("sync: per=%d scntl3=0x%x ofs=%d fak=%d chg=%d.\n",
|
|
per, scntl3, ofs, fak, chg);
|
|
}
|
|
|
|
if (INB (HS_PRT) == HS_NEGOTIATE) {
|
|
OUTB (HS_PRT, HS_BUSY);
|
|
switch (cp->nego_status) {
|
|
|
|
case NS_SYNC:
|
|
/*
|
|
** This was an answer message
|
|
*/
|
|
if (chg) {
|
|
/*
|
|
** Answer wasn't acceptable.
|
|
*/
|
|
ncr_setsync (np, cp, 0, 0xe0);
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
|
|
} else {
|
|
/*
|
|
** Answer is ok.
|
|
*/
|
|
ncr_setsync (np,cp,scntl3,(fak<<5)|ofs);
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
|
|
};
|
|
return;
|
|
|
|
case NS_WIDE:
|
|
ncr_setwide (np, cp, 0, 0);
|
|
break;
|
|
};
|
|
};
|
|
|
|
/*
|
|
** It was a request. Set value and
|
|
** prepare an answer message
|
|
*/
|
|
|
|
ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
|
|
|
|
np->msgout[0] = M_EXTENDED;
|
|
np->msgout[1] = 3;
|
|
np->msgout[2] = M_X_SYNC_REQ;
|
|
np->msgout[3] = per;
|
|
np->msgout[4] = ofs;
|
|
|
|
cp->nego_status = NS_SYNC;
|
|
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("sync msgout: ");
|
|
(void) ncr_show_msg (np->msgout);
|
|
printf (".\n");
|
|
}
|
|
|
|
if (!ofs) {
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
|
|
return;
|
|
}
|
|
np->msgin [0] = M_NOOP;
|
|
|
|
break;
|
|
|
|
case SIR_NEGO_WIDE:
|
|
/*
|
|
** Wide request message received.
|
|
*/
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("wide msgin: ");
|
|
(void) ncr_show_msg (np->msgin);
|
|
printf (".\n");
|
|
};
|
|
|
|
/*
|
|
** get requested values.
|
|
*/
|
|
|
|
chg = 0;
|
|
wide = np->msgin[3];
|
|
|
|
/*
|
|
** if target sends WDTR message,
|
|
** it CAN transfer wide.
|
|
*/
|
|
|
|
if (wide)
|
|
tp->inqdata[7] |= INQ7_WIDE16;
|
|
|
|
/*
|
|
** check values against driver limits.
|
|
*/
|
|
|
|
if (wide > tp->usrwide)
|
|
{chg = 1; wide = tp->usrwide;}
|
|
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("wide: wide=%d chg=%d.\n", wide, chg);
|
|
}
|
|
|
|
if (INB (HS_PRT) == HS_NEGOTIATE) {
|
|
OUTB (HS_PRT, HS_BUSY);
|
|
switch (cp->nego_status) {
|
|
|
|
case NS_WIDE:
|
|
/*
|
|
** This was an answer message
|
|
*/
|
|
if (chg) {
|
|
/*
|
|
** Answer wasn't acceptable.
|
|
*/
|
|
ncr_setwide (np, cp, 0, 1);
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
|
|
} else {
|
|
/*
|
|
** Answer is ok.
|
|
*/
|
|
ncr_setwide (np, cp, wide, 1);
|
|
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
|
|
};
|
|
return;
|
|
|
|
case NS_SYNC:
|
|
ncr_setsync (np, cp, 0, 0xe0);
|
|
break;
|
|
};
|
|
};
|
|
|
|
/*
|
|
** It was a request, set value and
|
|
** prepare an answer message
|
|
*/
|
|
|
|
ncr_setwide (np, cp, wide, 1);
|
|
|
|
np->msgout[0] = M_EXTENDED;
|
|
np->msgout[1] = 2;
|
|
np->msgout[2] = M_X_WIDE_REQ;
|
|
np->msgout[3] = wide;
|
|
|
|
np->msgin [0] = M_NOOP;
|
|
|
|
cp->nego_status = NS_WIDE;
|
|
|
|
if (DEBUG_FLAGS & DEBUG_NEGO) {
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("wide msgout: ");
|
|
(void) ncr_show_msg (np->msgout);
|
|
printf (".\n");
|
|
}
|
|
break;
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Processing of special messages
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
case SIR_REJECT_RECEIVED:
|
|
/*-----------------------------------------------
|
|
**
|
|
** We received a M_REJECT message.
|
|
**
|
|
**-----------------------------------------------
|
|
*/
|
|
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("M_REJECT received (%x:%x).\n",
|
|
(unsigned)np->lastmsg, np->msgout[0]);
|
|
break;
|
|
|
|
case SIR_REJECT_SENT:
|
|
/*-----------------------------------------------
|
|
**
|
|
** We received an unknown message
|
|
**
|
|
**-----------------------------------------------
|
|
*/
|
|
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("M_REJECT sent for ");
|
|
(void) ncr_show_msg (np->msgin);
|
|
printf (".\n");
|
|
break;
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Processing of special messages
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
case SIR_IGN_RESIDUE:
|
|
/*-----------------------------------------------
|
|
**
|
|
** We received an IGNORE RESIDUE message,
|
|
** which couldn't be handled by the script.
|
|
**
|
|
**-----------------------------------------------
|
|
*/
|
|
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("M_IGN_RESIDUE received, but not yet implemented.\n");
|
|
break;
|
|
|
|
case SIR_MISSING_SAVE:
|
|
/*-----------------------------------------------
|
|
**
|
|
** We received an DISCONNECT message,
|
|
** but the datapointer wasn't saved before.
|
|
**
|
|
**-----------------------------------------------
|
|
*/
|
|
|
|
PRINT_ADDR(cp->xfer);
|
|
printf ("M_DISCONNECT received, but datapointer not saved:\n"
|
|
"\tdata=%x save=%x goal=%x.\n",
|
|
(unsigned) INL (nc_temp),
|
|
(unsigned) np->header.savep,
|
|
(unsigned) np->header.goalp);
|
|
break;
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Processing of a "S_QUEUE_FULL" status.
|
|
**
|
|
** The current command has been rejected,
|
|
** because there are too many in the command queue.
|
|
** 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 is REALLY idle). Then restart processing.
|
|
**
|
|
** We should restart the current job after the controller
|
|
** has become idle. But this is not yet implemented.
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
case SIR_STALL_QUEUE:
|
|
/*-----------------------------------------------
|
|
**
|
|
** 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@
|
|
**
|
|
** Should update the launch field of the
|
|
** current job to be able to restart it.
|
|
** Then prepend it to the start queue.
|
|
*/
|
|
|
|
/* fall through */
|
|
|
|
case SIR_STALL_RESTART:
|
|
/*-----------------------------------------------
|
|
**
|
|
** Enable selecting again,
|
|
** if NO disconnected jobs.
|
|
**
|
|
**-----------------------------------------------
|
|
*/
|
|
/*
|
|
** 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, NCB_SCRIPT_PHYS (np, 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, np->rv_dcntl | STD);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** 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;
|
|
int oldspl;
|
|
|
|
oldspl = splhigh();
|
|
/*
|
|
** 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, PRIBIO|PCATCH, "ncr", 0))
|
|
break;
|
|
};
|
|
|
|
if (cp->magic) {
|
|
splx(oldspl);
|
|
return ((ccb_p) 0);
|
|
}
|
|
|
|
cp->magic = 1;
|
|
splx(oldspl);
|
|
return (cp);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Release one control block
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
void ncr_free_ccb (ncb_p np, ccb_p cp, int flags)
|
|
{
|
|
/*
|
|
** sanity
|
|
*/
|
|
|
|
assert (cp != NULL);
|
|
|
|
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, u_long target, u_long lun)
|
|
{
|
|
tcb_p tp;
|
|
lcb_p lp;
|
|
ccb_p cp;
|
|
|
|
assert (np != NULL);
|
|
|
|
if (target>=MAX_TARGET) return;
|
|
if (lun >=MAX_LUN ) return;
|
|
|
|
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] =
|
|
(np->features & FE_PFEN)? SCR_COPY(1) : SCR_COPY_F(1);
|
|
tp->getscr[1] = vtophys (&tp->sval);
|
|
tp->getscr[2] = np->paddr + offsetof (struct ncr_reg, nc_sxfer);
|
|
tp->getscr[3] =
|
|
(np->features & FE_PFEN)? SCR_COPY(1) : SCR_COPY_F(1);
|
|
tp->getscr[4] = vtophys (&tp->wval);
|
|
tp->getscr[5] = np->paddr + offsetof (struct ncr_reg, nc_scntl3);
|
|
|
|
assert (( (offsetof(struct ncr_reg, nc_sxfer) ^
|
|
offsetof(struct tcb , sval )) &3) == 0);
|
|
assert (( (offsetof(struct ncr_reg, nc_scntl3) ^
|
|
offsetof(struct tcb , wval )) &3) == 0);
|
|
|
|
tp->call_lun.l_cmd = (SCR_CALL);
|
|
tp->call_lun.l_paddr = NCB_SCRIPT_PHYS (np, resel_lun);
|
|
|
|
tp->jump_lcb.l_cmd = (SCR_JUMP);
|
|
tp->jump_lcb.l_paddr = NCB_SCRIPTH_PHYS (np, abort);
|
|
np->jump_tcb.l_paddr = vtophys (&tp->jump_tcb);
|
|
|
|
tp->usrtags = SCSI_NCR_DFLT_TAGS;
|
|
ncr_setmaxtags (tp, tp->usrtags);
|
|
}
|
|
|
|
/*
|
|
** 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 = NCB_SCRIPT_PHYS (np, resel_tag);
|
|
|
|
lp->jump_ccb.l_cmd = (SCR_JUMP);
|
|
lp->jump_ccb.l_paddr = NCB_SCRIPTH_PHYS (np, aborttag);
|
|
|
|
lp->actlink = 1;
|
|
|
|
/*
|
|
** Chain into LUN list
|
|
*/
|
|
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;
|
|
|
|
if (DEBUG_FLAGS & DEBUG_ALLOC) {
|
|
printf ("new ccb @%x.\n", (unsigned) cp);
|
|
}
|
|
|
|
/*
|
|
** Count it
|
|
*/
|
|
lp->actccbs++;
|
|
np->actccbs++;
|
|
|
|
/*
|
|
** Initialize it
|
|
*/
|
|
bzero (cp, sizeof (*cp));
|
|
|
|
/*
|
|
** Fill in physical addresses
|
|
*/
|
|
|
|
cp->p_ccb = vtophys (cp);
|
|
|
|
/*
|
|
** Chain into reselect list
|
|
*/
|
|
cp->jump_ccb.l_cmd = SCR_JUMP;
|
|
cp->jump_ccb.l_paddr = lp->jump_ccb.l_paddr;
|
|
lp->jump_ccb.l_paddr = CCB_PHYS (cp, jump_ccb);
|
|
cp->call_tmp.l_cmd = SCR_CALL;
|
|
cp->call_tmp.l_paddr = NCB_SCRIPT_PHYS (np, resel_tmp);
|
|
|
|
/*
|
|
** Chain into wakeup list
|
|
*/
|
|
cp->link_ccb = np->ccb->link_ccb;
|
|
np->ccb->link_ccb = cp;
|
|
|
|
/*
|
|
** Chain into CCB list
|
|
*/
|
|
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)
|
|
{
|
|
/*
|
|
** 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;
|
|
|
|
#ifdef __NetBSD__
|
|
if (diff > xp->sc_link->openings)
|
|
diff = xp->sc_link->openings;
|
|
|
|
xp->sc_link->openings -= diff;
|
|
#else /* !__NetBSD__ */
|
|
if (diff > xp->sc_link->opennings)
|
|
diff = xp->sc_link->opennings;
|
|
|
|
xp->sc_link->opennings -= diff;
|
|
#endif /* __NetBSD__ */
|
|
lp->actlink -= diff;
|
|
if (DEBUG_FLAGS & DEBUG_TAGS)
|
|
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
|
|
ncr_name(np), diff, lp->actlink, lp->reqlink);
|
|
return;
|
|
};
|
|
|
|
/*
|
|
** want to increase the number ?
|
|
*/
|
|
if (lp->reqlink > lp->actlink) {
|
|
u_char diff = lp->reqlink - lp->actlink;
|
|
|
|
#ifdef __NetBSD__
|
|
xp->sc_link->openings += diff;
|
|
#else /* !__NetBSD__ */
|
|
xp->sc_link->opennings += diff;
|
|
#endif /* __NetBSD__ */
|
|
lp->actlink += diff;
|
|
wakeup ((caddr_t) xp->sc_link);
|
|
if (DEBUG_FLAGS & DEBUG_TAGS)
|
|
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
|
|
ncr_name(np), diff, lp->actlink, lp->reqlink);
|
|
};
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Build Scatter Gather Block
|
|
**
|
|
**
|
|
**==========================================================
|
|
**
|
|
** The transfer area may be scattered among
|
|
** several non adjacent physical pages.
|
|
**
|
|
** We may use MAX_SCATTER blocks.
|
|
**
|
|
**----------------------------------------------------------
|
|
*/
|
|
|
|
static int 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 caused
|
|
** by unexpected phase changes due to disconnects.
|
|
** A typical harddisk may disconnect before ANY block.
|
|
** If we wanted to avoid unexpected phase changes at all
|
|
** we had to use a break point every 512 bytes.
|
|
** Of course the number of scatter/gather blocks is
|
|
** limited.
|
|
*/
|
|
|
|
free = MAX_SCATTER - 1;
|
|
|
|
if (vaddr & PAGE_MASK) free -= datalen / PAGE_SIZE;
|
|
|
|
if (free>1)
|
|
while ((chunk * free >= 2 * datalen) && (chunk>=1024))
|
|
chunk /= 2;
|
|
|
|
if(DEBUG_FLAGS & DEBUG_SCATTER)
|
|
printf("ncr?:\tscattering virtual=0x%x size=%d chunk=%d.\n",
|
|
(unsigned) vaddr, (unsigned) datalen, (unsigned) chunk);
|
|
|
|
/*
|
|
** 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 & (~PAGE_MASK)) + PAGE_SIZE;
|
|
|
|
/*
|
|
** 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);
|
|
};
|
|
|
|
if(DEBUG_FLAGS & DEBUG_SCATTER)
|
|
printf ("\tseg #%d addr=%x size=%d (rest=%d).\n",
|
|
segment,
|
|
(unsigned) segaddr,
|
|
(unsigned) segsize,
|
|
(unsigned) datalen);
|
|
|
|
phys->data[segment].addr = segaddr;
|
|
phys->data[segment].size = segsize;
|
|
segment++;
|
|
}
|
|
|
|
if (datalen) {
|
|
printf("ncr?: scatter/gather failed (residue=%d).\n",
|
|
(unsigned) datalen);
|
|
return (-1);
|
|
};
|
|
|
|
return (segment);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Test the pci bus snoop logic :-(
|
|
**
|
|
** Has to be called with interrupts disabled.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
#ifndef NCR_IOMAPPED
|
|
static int ncr_regtest (struct ncb* np)
|
|
{
|
|
register volatile u_int32_t data, *addr;
|
|
/*
|
|
** ncr registers may NOT be cached.
|
|
** write 0xffffffff to a read only register area,
|
|
** and try to read it back.
|
|
*/
|
|
addr = (volatile u_int32_t *) &np->reg->nc_dstat;
|
|
data = 0xffffffff;
|
|
*addr= data;
|
|
data = *addr;
|
|
#if 1
|
|
if (data == 0xffffffff) {
|
|
#else
|
|
if ((data & 0xe2f0fffd) != 0x02000080) {
|
|
#endif
|
|
printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
|
|
(unsigned) data);
|
|
return (0x10);
|
|
};
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
static int ncr_snooptest (struct ncb* np)
|
|
{
|
|
u_int32_t ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
|
|
int i, err=0;
|
|
#ifndef NCR_IOMAPPED
|
|
err |= ncr_regtest (np);
|
|
if (err) return (err);
|
|
#endif
|
|
/*
|
|
** init
|
|
*/
|
|
pc = NCB_SCRIPTH_PHYS (np, snooptest);
|
|
host_wr = 1;
|
|
ncr_wr = 2;
|
|
/*
|
|
** Set memory and register.
|
|
*/
|
|
ncr_cache = host_wr;
|
|
OUTL (nc_temp, ncr_wr);
|
|
/*
|
|
** Start script (exchange values)
|
|
*/
|
|
OUTL (nc_dsp, pc);
|
|
/*
|
|
** Wait 'til done (with timeout)
|
|
*/
|
|
for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
|
|
if (INB(nc_istat) & (INTF|SIP|DIP))
|
|
break;
|
|
/*
|
|
** Save termination position.
|
|
*/
|
|
pc = INL (nc_dsp);
|
|
/*
|
|
** Read memory and register.
|
|
*/
|
|
host_rd = ncr_cache;
|
|
ncr_rd = INL (nc_scratcha);
|
|
ncr_bk = INL (nc_temp);
|
|
/*
|
|
** Reset ncr chip
|
|
*/
|
|
OUTB (nc_istat, SRST);
|
|
DELAY (1000);
|
|
OUTB (nc_istat, 0 );
|
|
/*
|
|
** check for timeout
|
|
*/
|
|
if (i>=NCR_SNOOP_TIMEOUT) {
|
|
printf ("CACHE TEST FAILED: timeout.\n");
|
|
return (0x20);
|
|
};
|
|
/*
|
|
** Check termination position.
|
|
*/
|
|
if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
|
|
printf ("CACHE TEST FAILED: script execution failed.\n");
|
|
printf ("start=%08lx, pc=%08lx, end=%08lx\n",
|
|
(u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc,
|
|
(u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
|
|
return (0x40);
|
|
};
|
|
/*
|
|
** Show results.
|
|
*/
|
|
if (host_wr != ncr_rd) {
|
|
printf ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
|
|
(int) host_wr, (int) ncr_rd);
|
|
err |= 1;
|
|
};
|
|
if (host_rd != ncr_wr) {
|
|
printf ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
|
|
(int) ncr_wr, (int) host_rd);
|
|
err |= 2;
|
|
};
|
|
if (ncr_bk != ncr_wr) {
|
|
printf ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
|
|
(int) ncr_wr, (int) ncr_bk);
|
|
err |= 4;
|
|
};
|
|
return (err);
|
|
}
|
|
|
|
/*==========================================================
|
|
**
|
|
**
|
|
** Profiling the drivers and targets performance.
|
|
**
|
|
**
|
|
**==========================================================
|
|
*/
|
|
|
|
/*
|
|
** Compute the difference in milliseconds.
|
|
**/
|
|
|
|
static int ncr_delta (int *from, int *to)
|
|
{
|
|
if (!from) return (-1);
|
|
if (!to) return (-2);
|
|
return ((to - from) * 1000 / hz);
|
|
}
|
|
|
|
#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 = ticks;
|
|
|
|
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
|
|
|
|
/*==========================================================
|
|
**
|
|
** Determine the ncr's clock frequency.
|
|
** This is essential for the negotiation
|
|
** of the synchronous transfer rate.
|
|
**
|
|
**==========================================================
|
|
**
|
|
** Note: we have to return the correct value.
|
|
** THERE IS NO SAVE DEFAULT VALUE.
|
|
**
|
|
** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
|
|
** 53C860 and 53C875 rev. 1 support fast20 transfers but
|
|
** do not have a clock doubler and so are provided with a
|
|
** 80 MHz clock. All other fast20 boards incorporate a doubler
|
|
** and so should be delivered with a 40 MHz clock.
|
|
** The future fast40 chips (895/895) use a 40 Mhz base clock
|
|
** and provide a clock quadrupler (160 Mhz). The code below
|
|
** tries to deal as cleverly as possible with all this stuff.
|
|
**
|
|
**----------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* Select NCR SCSI clock frequency
|
|
*/
|
|
static void ncr_selectclock(ncb_p np, u_char scntl3)
|
|
{
|
|
if (np->multiplier < 2) {
|
|
OUTB(nc_scntl3, scntl3);
|
|
return;
|
|
}
|
|
|
|
if (bootverbose >= 2)
|
|
printf ("%s: enabling clock multiplier\n", ncr_name(np));
|
|
|
|
OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
|
|
if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
|
|
int i = 20;
|
|
while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
|
|
DELAY(20);
|
|
if (!i)
|
|
printf("%s: the chip cannot lock the frequency\n", ncr_name(np));
|
|
} else /* Wait 20 micro-seconds for doubler */
|
|
DELAY(20);
|
|
OUTB(nc_stest3, HSC); /* Halt the scsi clock */
|
|
OUTB(nc_scntl3, scntl3);
|
|
OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
|
|
OUTB(nc_stest3, 0x00); /* Restart scsi clock */
|
|
}
|
|
|
|
/*
|
|
* calculate NCR SCSI clock frequency (in KHz)
|
|
*/
|
|
static unsigned
|
|
ncrgetfreq (ncb_p np, int gen)
|
|
{
|
|
int ms = 0;
|
|
/*
|
|
* Measure GEN timer delay in order
|
|
* to calculate SCSI clock frequency
|
|
*
|
|
* This code will never execute too
|
|
* many loop iterations (if DELAY is
|
|
* reasonably correct). It could get
|
|
* too low a delay (too high a freq.)
|
|
* if the CPU is slow executing the
|
|
* loop for some reason (an NMI, for
|
|
* example). For this reason we will
|
|
* if multiple measurements are to be
|
|
* performed trust the higher delay
|
|
* (lower frequency returned).
|
|
*/
|
|
OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
|
|
OUTW (nc_sien , 0); /* mask all scsi interrupts */
|
|
(void) INW (nc_sist); /* clear pending scsi interrupt */
|
|
OUTB (nc_dien , 0); /* mask all dma interrupts */
|
|
(void) INW (nc_sist); /* another one, just to be sure :) */
|
|
OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
|
|
OUTB (nc_stime1, 0); /* disable general purpose timer */
|
|
OUTB (nc_stime1, gen); /* set to nominal delay of (1<<gen) * 125us */
|
|
while (!(INW(nc_sist) & GEN) && ms++ < 1000)
|
|
DELAY(1000); /* count ms */
|
|
OUTB (nc_stime1, 0); /* disable general purpose timer */
|
|
OUTB (nc_scntl3, 0);
|
|
/*
|
|
* Set prescaler to divide by whatever "0" means.
|
|
* "0" ought to choose divide by 2, but appears
|
|
* to set divide by 3.5 mode in my 53c810 ...
|
|
*/
|
|
OUTB (nc_scntl3, 0);
|
|
|
|
if (bootverbose >= 2)
|
|
printf ("\tDelay (GEN=%d): %lu msec\n", gen, ms);
|
|
/*
|
|
* adjust for prescaler, and convert into KHz
|
|
*/
|
|
return ms ? ((1 << gen) * 4440) / ms : 0;
|
|
}
|
|
|
|
static void ncr_getclock (ncb_p np, u_char multiplier)
|
|
{
|
|
unsigned char scntl3;
|
|
unsigned char stest1;
|
|
scntl3 = INB(nc_scntl3);
|
|
stest1 = INB(nc_stest1);
|
|
|
|
np->multiplier = 1;
|
|
/* always false, except for 875 with clock doubler selected */
|
|
if ((stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
|
|
np->multiplier = multiplier;
|
|
np->clock_khz = 40000 * multiplier;
|
|
} else {
|
|
if ((scntl3 & 7) == 0) {
|
|
unsigned f1, f2;
|
|
/* throw away first result */
|
|
(void) ncrgetfreq (np, 11);
|
|
f1 = ncrgetfreq (np, 11);
|
|
f2 = ncrgetfreq (np, 11);
|
|
|
|
if (bootverbose >= 2)
|
|
printf ("\tNCR clock is %luKHz, %luKHz\n", f1, f2);
|
|
if (f1 > f2) f1 = f2; /* trust lower result */
|
|
if (f1 > 45000) {
|
|
scntl3 = 5; /* >45Mhz: assume 80MHz */
|
|
} else {
|
|
scntl3 = 3; /* <45Mhz: assume 40MHz */
|
|
}
|
|
}
|
|
else if ((scntl3 & 7) == 5)
|
|
np->clock_khz = 80000; /* Probably a 875 rev. 1 ? */
|
|
}
|
|
}
|
|
|
|
/*=========================================================================*/
|
|
|
|
#ifdef NCR_TEKRAM_EEPROM
|
|
|
|
struct tekram_eeprom_dev {
|
|
u_char devmode;
|
|
#define TKR_PARCHK 0x01
|
|
#define TKR_TRYSYNC 0x02
|
|
#define TKR_ENDISC 0x04
|
|
#define TKR_STARTUNIT 0x08
|
|
#define TKR_USETAGS 0x10
|
|
#define TKR_TRYWIDE 0x20
|
|
u_char syncparam; /* max. sync transfer rate (table ?) */
|
|
u_char filler1;
|
|
u_char filler2;
|
|
};
|
|
|
|
|
|
struct tekram_eeprom {
|
|
struct tekram_eeprom_dev
|
|
dev[16];
|
|
u_char adaptid;
|
|
u_char adaptmode;
|
|
#define TKR_ADPT_GT2DRV 0x01
|
|
#define TKR_ADPT_GT1GB 0x02
|
|
#define TKR_ADPT_RSTBUS 0x04
|
|
#define TKR_ADPT_ACTNEG 0x08
|
|
#define TKR_ADPT_NOSEEK 0x10
|
|
#define TKR_ADPT_MORLUN 0x20
|
|
u_char delay; /* unit ? (table ???) */
|
|
u_char tags; /* use 4 times as many ... */
|
|
u_char filler[60];
|
|
};
|
|
|
|
static void
|
|
tekram_write_bit (ncb_p np, int bit)
|
|
{
|
|
u_char val = 0x10 + ((bit & 1) << 1);
|
|
|
|
DELAY(10);
|
|
OUTB (nc_gpreg, val);
|
|
DELAY(10);
|
|
OUTB (nc_gpreg, val | 0x04);
|
|
DELAY(10);
|
|
OUTB (nc_gpreg, val);
|
|
DELAY(10);
|
|
}
|
|
|
|
static int
|
|
tekram_read_bit (ncb_p np)
|
|
{
|
|
OUTB (nc_gpreg, 0x10);
|
|
DELAY(10);
|
|
OUTB (nc_gpreg, 0x14);
|
|
DELAY(10);
|
|
return INB (nc_gpreg) & 1;
|
|
}
|
|
|
|
static u_short
|
|
read_tekram_eeprom_reg (ncb_p np, int reg)
|
|
{
|
|
int bit;
|
|
u_short result = 0;
|
|
int cmd = 0x80 | reg;
|
|
|
|
OUTB (nc_gpreg, 0x10);
|
|
|
|
tekram_write_bit (np, 1);
|
|
for (bit = 7; bit >= 0; bit--)
|
|
{
|
|
tekram_write_bit (np, cmd >> bit);
|
|
}
|
|
|
|
for (bit = 0; bit < 16; bit++)
|
|
{
|
|
result <<= 1;
|
|
result |= tekram_read_bit (np);
|
|
}
|
|
|
|
OUTB (nc_gpreg, 0x00);
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
read_tekram_eeprom(ncb_p np, struct tekram_eeprom *buffer)
|
|
{
|
|
u_short *p = (u_short *) buffer;
|
|
u_short sum = 0;
|
|
int i;
|
|
|
|
if (INB (nc_gpcntl) != 0x09)
|
|
{
|
|
return 0;
|
|
}
|
|
for (i = 0; i < 64; i++)
|
|
{
|
|
u_short val;
|
|
if((i&0x0f) == 0) printf ("%02x:", i*2);
|
|
val = read_tekram_eeprom_reg (np, i);
|
|
if (p)
|
|
*p++ = val;
|
|
sum += val;
|
|
if((i&0x01) == 0x00) printf (" ");
|
|
printf ("%02x%02x", val & 0xff, (val >> 8) & 0xff);
|
|
if((i&0x0f) == 0x0f) printf ("\n");
|
|
}
|
|
printf ("Sum = %04x\n", sum);
|
|
return sum == 0x1234;
|
|
}
|
|
#endif /* NCR_TEKRAM_EEPROM */
|
|
|
|
/*=========================================================================*/
|
|
#endif /* KERNEL */
|