3898 lines
101 KiB
C
3898 lines
101 KiB
C
/*
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* Generic driver for the aic7xxx based adaptec SCSI controllers
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* Product specific probe and attach routines can be found in:
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* i386/eisa/aic7770.c 27/284X and aic7770 motherboard controllers
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* pci/aic7870.c 3940, 2940, aic7880, aic7870, aic7860,
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* and aic7850 controllers
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*
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* Copyright (c) 1994, 1995, 1996, 1997 Justin T. Gibbs.
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* 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 immediately at the beginning of the file, without modification,
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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: aic7xxx.c,v 1.111 1997/04/04 04:21:43 gibbs Exp $
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*/
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/*
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* TODO:
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* Implement Target Mode
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*
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* A few notes on features of the driver.
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*
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* SCB paging takes advantage of the fact that devices stay disconnected
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* from the bus a relatively long time and that while they're disconnected,
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* having the SCBs for these transactions down on the host adapter is of
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* little use. Instead of leaving this idle SCB down on the card we copy
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* it back up into kernel memory and reuse the SCB slot on the card to
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* schedule another transaction. This can be a real payoff when doing random
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* I/O to tagged queueing devices since there are more transactions active at
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* once for the device to sort for optimal seek reduction. The algorithm goes
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* like this...
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*
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* The sequencer maintains two lists of its hardware SCBs. The first is the
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* singly linked free list which tracks all SCBs that are not currently in
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* use. The second is the doubly linked disconnected list which holds the
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* SCBs of transactions that are in the disconnected state sorted most
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* recently disconnected first. When the kernel queues a transaction to
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* the card, a hardware SCB to "house" this transaction is retrieved from
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* either of these two lists. If the SCB came from the disconnected list,
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* a check is made to see if any data transfer or SCB linking (more on linking
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* in a bit) information has been changed since it was copied from the host
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* and if so, DMAs the SCB back up before it can be used. Once a hardware
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* SCB has been obtained, the SCB is DMAed from the host. Before any work
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* can begin on this SCB, the sequencer must ensure that either the SCB is
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* for a tagged transaction or the target is not already working on another
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* non-tagged transaction. If a conflict arises in the non-tagged case, the
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* sequencer finds the SCB for the active transactions and sets the SCB_LINKED
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* field in that SCB to this next SCB to execute. To facilitate finding
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* active non-tagged SCBs, the last four bytes of up to the first four hardware
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* SCBs serve as a storage area for the currently active SCB ID for each
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* target.
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*
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* When a device reconnects, a search is made of the hardware SCBs to find
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* the SCB for this transaction. If the search fails, a hardware SCB is
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* pulled from either the free or disconnected SCB list and the proper
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* SCB is DMAed from the host. If the SCB_ABORTED control bit is set
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* in the control byte of the SCB while it was disconnected, the sequencer
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* will send an abort or abort tag message to the target during the
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* reconnection and signal the kernel that the abort was successfull.
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*
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* When a command completes, a check for non-zero status and residuals is
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* made. If either of these conditions exists, the SCB is DMAed back up to
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* the host so that it can interpret this information. Additionally, in the
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* case of bad status, the sequencer generates a special interrupt and pauses
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* itself. This allows the host to setup a request sense command if it
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* chooses for this target synchronously with the error so that sense
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* information isn't lost.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#if defined(__NetBSD__)
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#endif /* defined(__NetBSD__) */
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsi_message.h>
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#if defined(__NetBSD__)
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#include <scsi/scsi_debug.h>
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#endif
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#include <scsi/scsiconf.h>
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#include <scsi/scsi_debug.h>
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#if defined(__FreeBSD__)
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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/vm_param.h>
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#include <vm/pmap.h>
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#if defined(__FreeBSD__)
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#include <i386/scsi/aic7xxx.h>
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#include <dev/aic7xxx/sequencer.h>
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#include <aic7xxx_reg.h>
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#include <aic7xxx_seq.h>
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#endif /* defined(__FreeBSD__) */
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#if defined(__NetBSD__)
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#include <dev/ic/aic7xxxreg.h>
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#include <dev/ic/aic7xxxvar.h>
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#define bootverbose 1
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#if DEBUGTARGET < 0 /* Negative numbers for disabling cause warnings */
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#define DEBUGTARGET 17
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#endif
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#endif /* defined(__NetBSD__) */
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#include <sys/kernel.h>
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#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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#define MIN(a,b) (((a) < (b)) ? (a) : (b))
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#define ALL_TARGETS -1
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#define ALL_LUNS -1
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#define ALL_CHANNELS '\0'
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#if defined(__FreeBSD__)
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u_long ahc_unit = 0;
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#endif
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#ifdef AHC_DEBUG
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static int ahc_debug = AHC_DEBUG;
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#endif
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#ifdef AHC_BROKEN_CACHE
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int ahc_broken_cache = 1;
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/*
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* "wbinvd" cause writing back whole cache (both CPU internal & external)
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* to memory, so that the instruction takes a lot of time.
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* This makes machine slow.
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*/
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#define INVALIDATE_CACHE() __asm __volatile("wbinvd")
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#endif
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/**** bit definitions for SCSIDEF ****/
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#define HSCSIID 0x07 /* our SCSI ID */
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#define HWSCSIID 0x0f /* our SCSI ID if Wide Bus */
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static void ahcminphys __P((struct buf *bp));
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static int32_t ahc_scsi_cmd __P((struct scsi_xfer *xs));
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static void ahc_run_waiting_queue __P((struct ahc_softc *ahc));
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static struct scb *
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ahc_get_scb __P((struct ahc_softc *ahc, u_int32_t flags));
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static void ahc_free_scb __P((struct ahc_softc *ahc, struct scb *scb));
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static struct scb *
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ahc_alloc_scb __P((struct ahc_softc *ahc));
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static inline void pause_sequencer __P((struct ahc_softc *ahc));
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static inline void unpause_sequencer __P((struct ahc_softc *ahc,
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int unpause_always));
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static inline void restart_sequencer __P((struct ahc_softc *ahc));
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static int timeouts_work; /*
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* Boolean that lets the driver know
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* that it can safely use timeouts
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* for event scheduling. Timeouts
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* don't work early in the boot
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* process.
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*/
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#define AHC_BUSRESET_DELAY 1000 /* Reset delay in us */
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#define AHC_BUSSETTLE_DELAY (100 * 1000)/* Delay before taking commands
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* after a reset in us
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*/
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static struct scsi_adapter ahc_switch =
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{
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ahc_scsi_cmd,
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ahcminphys,
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NULL,
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NULL,
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#if defined(__FreeBSD__)
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NULL,
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"ahc",
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{ 0, 0 }
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#endif
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};
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static struct scsi_device ahc_dev =
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{
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NULL, /* Use default error handler */
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NULL, /* have a queue, served by this */
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NULL, /* have no async handler */
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NULL, /* Use default 'done' routine */
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#if defined(__FreeBSD__)
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"ahc",
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0,
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{ 0, 0 }
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#endif
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};
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static inline void
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pause_sequencer(ahc)
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struct ahc_softc *ahc;
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{
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ahc_outb(ahc, HCNTRL, ahc->pause);
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/*
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* Since the sequencer can disable pausing in a critical section, we
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* must loop until it actually stops.
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*/
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while ((ahc_inb(ahc, HCNTRL) & PAUSE) == 0)
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;
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}
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static inline void
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unpause_sequencer(ahc, unpause_always)
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struct ahc_softc *ahc;
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int unpause_always;
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{
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if (unpause_always
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|| (ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0)
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ahc_outb(ahc, HCNTRL, ahc->unpause);
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}
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/*
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* Restart the sequencer program from address zero
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*/
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static inline void
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restart_sequencer(ahc)
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struct ahc_softc *ahc;
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{
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do {
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ahc_outb(ahc, SEQCTL, SEQRESET|FASTMODE);
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} while ((ahc_inb(ahc, SEQADDR0) != 0)
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|| (ahc_inb(ahc, SEQADDR1) != 0));
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unpause_sequencer(ahc, /*unpause_always*/TRUE);
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}
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#if defined(__FreeBSD__)
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#define IS_SCSIBUS_B(ahc, sc_link) \
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(((u_int32_t)((sc_link)->fordriver) & SELBUSB) != 0)
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#else /* NetBSD/OpenBSD */
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#define IS_SCSIBUS_B(ahc, sc_link) \
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((sc_link)->scsibus == (ahc)->sc_link_b.scsibus)
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#endif
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static u_int8_t ahc_abort_wscb __P((struct ahc_softc *ahc, struct scb *scbp,
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u_int8_t scbpos, u_int8_t prev,
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u_int32_t xs_error));
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static void ahc_done __P((struct ahc_softc *ahc, struct scb *scbp));
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static void ahc_handle_seqint __P((struct ahc_softc *ahc, u_int8_t intstat));
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static void ahc_handle_scsiint __P((struct ahc_softc *ahc,
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u_int8_t intstat));
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static void ahc_handle_devreset __P((struct ahc_softc *ahc,
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struct scb *scb));
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static void ahc_loadseq __P((struct ahc_softc *ahc));
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static struct patch *
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ahc_next_patch __P((struct patch *cur_patch, int options,
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int instrptr));
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static void ahc_download_instr __P((struct ahc_softc *ahc, int options,
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int instrptr));
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static int ahc_match_scb __P((struct scb *scb, int target, char channel,
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int lun, u_int8_t tag));
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static int ahc_poll __P((struct ahc_softc *ahc, int wait));
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#ifdef AHC_DEBUG
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static void ahc_print_scb __P((struct scb *scb));
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#endif
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static u_int8_t ahc_find_scb __P((struct ahc_softc *ahc, struct scb *scb));
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static int ahc_search_qinfifo __P((struct ahc_softc *ahc, int target,
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char channel, int lun, u_int8_t tag,
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u_int32_t flags, u_int32_t xs_error,
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int requeue));
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static int ahc_reset_channel __P((struct ahc_softc *ahc, char channel,
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u_int32_t xs_error, int initiate_reset));
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static int ahc_reset_device __P((struct ahc_softc *ahc, int target,
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char channel, int lun, u_int8_t tag,
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u_int32_t xs_error));
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static u_int8_t ahc_rem_scb_from_disc_list __P((struct ahc_softc *ahc,
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u_int8_t scbptr));
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static void ahc_add_curscb_to_free_list __P((struct ahc_softc *ahc));
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static void ahc_clear_intstat __P((struct ahc_softc *ahc));
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static void ahc_reset_current_bus __P((struct ahc_softc *ahc));
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static void ahc_run_done_queue __P((struct ahc_softc *ahc));
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static void ahc_scsirate __P((struct ahc_softc* ahc, u_int8_t *scsirate,
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u_int8_t *period, u_int8_t *offset,
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char channel, int target));
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#if defined(__FreeBSD__)
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static timeout_t
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ahc_timeout;
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#elif defined(__NetBSD__)
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static void ahc_timeout __P((void *));
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#endif
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static timeout_t
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ahc_first_timeout;
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static timeout_t
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ahc_busreset_complete;
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static timeout_t
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ahc_busreset_settle_complete;
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static u_int8_t ahc_index_busy_target __P((struct ahc_softc *ahc, int target,
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char channel, int unbusy));
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static void ahc_busy_target __P((struct ahc_softc *ahc, int target,
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char channel, u_int8_t scbid));
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static void ahc_construct_sdtr __P((struct ahc_softc *ahc, int start_byte,
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u_int8_t period, u_int8_t offset));
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static void ahc_construct_wdtr __P((struct ahc_softc *ahc, int start_byte,
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u_int8_t bus_width));
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|
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static void ahc_calc_residual __P((struct scb *scb));
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#if defined(__FreeBSD__)
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char *ahc_name(ahc)
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struct ahc_softc *ahc;
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{
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static char name[10];
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sprintf(name, "ahc%d", ahc->unit);
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return (name);
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}
|
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|
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#elif defined(__NetBSD__)
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struct cfdriver ahc_cd = {
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NULL, "ahc", DV_DULL
|
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};
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#endif
|
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|
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#ifdef AHC_DEBUG
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static void
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ahc_print_scb(scb)
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struct scb *scb;
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{
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struct hardware_scb *hscb = scb->hscb;
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|
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printf("scb:%p control:0x%x tcl:0x%x cmdlen:%d cmdpointer:0x%lx\n",
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scb,
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hscb->control,
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hscb->tcl,
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hscb->cmdlen,
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hscb->cmdpointer );
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printf(" datlen:%d data:0x%lx segs:0x%x segp:0x%lx\n",
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hscb->datalen,
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hscb->data,
|
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hscb->SG_segment_count,
|
|
hscb->SG_list_pointer);
|
|
printf(" sg_addr:%lx sg_len:%ld\n",
|
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hscb->ahc_dma[0].addr,
|
|
hscb->ahc_dma[0].len);
|
|
}
|
|
|
|
#endif
|
|
|
|
static struct {
|
|
u_int8_t errno;
|
|
char *errmesg;
|
|
} hard_error[] = {
|
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{ ILLHADDR, "Illegal Host Access" },
|
|
{ ILLSADDR, "Illegal Sequencer Address referrenced" },
|
|
{ ILLOPCODE, "Illegal Opcode in sequencer program" },
|
|
{ PARERR, "Sequencer Ram Parity Error" }
|
|
};
|
|
|
|
|
|
/*
|
|
* Valid SCSIRATE values. (p. 3-17)
|
|
* Provides a mapping of tranfer periods in ns to the proper value to
|
|
* stick in the scsiscfr reg to use that transfer rate.
|
|
*/
|
|
static struct {
|
|
int sxfr;
|
|
/* Rates in Ultra mode have bit 8 of sxfr set */
|
|
#define ULTRA_SXFR 0x100
|
|
u_int8_t period; /* Period to send to SCSI target */
|
|
char *rate;
|
|
} ahc_syncrates[] = {
|
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{ 0x100, 12, "20.0" },
|
|
{ 0x110, 15, "16.0" },
|
|
{ 0x120, 18, "13.4" },
|
|
{ 0x000, 25, "10.0" },
|
|
{ 0x010, 31, "8.0" },
|
|
{ 0x020, 37, "6.67" },
|
|
{ 0x030, 43, "5.7" },
|
|
{ 0x040, 50, "5.0" },
|
|
{ 0x050, 56, "4.4" },
|
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{ 0x060, 62, "4.0" },
|
|
{ 0x070, 68, "3.6" }
|
|
};
|
|
|
|
static int ahc_num_syncrates =
|
|
sizeof(ahc_syncrates) / sizeof(ahc_syncrates[0]);
|
|
|
|
/*
|
|
* Allocate a controller structure for a new device and initialize it.
|
|
*/
|
|
#if defined(__FreeBSD__)
|
|
struct ahc_softc *
|
|
ahc_alloc(unit, iobase, maddr, type, flags, scb_data)
|
|
int unit;
|
|
u_int32_t iobase;
|
|
#elif defined(__NetBSD__)
|
|
void
|
|
ahc_construct(ahc, bc, ioh, maddr, type, flags)
|
|
struct ahc_softc *ahc;
|
|
bus_chipset_tag_t bc;
|
|
bus_io_handle_t ioh;
|
|
#endif
|
|
vm_offset_t maddr;
|
|
ahc_type type;
|
|
ahc_flag flags;
|
|
struct scb_data *scb_data;
|
|
{
|
|
/*
|
|
* find unit and check we have that many defined
|
|
*/
|
|
#if defined(__FreeBSD__)
|
|
struct ahc_softc *ahc;
|
|
size_t alloc_size;
|
|
|
|
/*
|
|
* Allocate a storage area for us
|
|
*/
|
|
if (scb_data == NULL)
|
|
/*
|
|
* We are not sharing SCB space with another controller
|
|
* so allocate our own SCB data space.
|
|
*/
|
|
alloc_size = sizeof(struct full_ahc_softc);
|
|
else
|
|
alloc_size = sizeof(struct ahc_softc);
|
|
ahc = malloc(alloc_size, M_DEVBUF, M_NOWAIT);
|
|
if (!ahc) {
|
|
printf("ahc%d: cannot malloc!\n", unit);
|
|
return NULL;
|
|
}
|
|
bzero(ahc, alloc_size);
|
|
#endif
|
|
if (scb_data == NULL) {
|
|
struct full_ahc_softc* full_softc = (struct full_ahc_softc*)ahc;
|
|
ahc->scb_data = &full_softc->scb_data_storage;
|
|
STAILQ_INIT(&ahc->scb_data->free_scbs);
|
|
} else
|
|
ahc->scb_data = scb_data;
|
|
STAILQ_INIT(&ahc->waiting_scbs);
|
|
#if defined(__FreeBSD__)
|
|
ahc->unit = unit;
|
|
#endif
|
|
#if defined(__FreeBSD__)
|
|
ahc->baseport = iobase;
|
|
#elif defined(__NetBSD__)
|
|
ahc->sc_bc = bc;
|
|
ahc->sc_ioh = ioh;
|
|
#endif
|
|
ahc->maddr = (volatile u_int8_t *)maddr;
|
|
ahc->type = type;
|
|
ahc->flags = flags;
|
|
ahc->unpause = (ahc_inb(ahc, HCNTRL) & IRQMS) | INTEN;
|
|
ahc->pause = ahc->unpause | PAUSE;
|
|
|
|
ahc->busreset_args.ahc = ahc;
|
|
ahc->busreset_args.bus = 'A';
|
|
ahc->busreset_args_b.ahc = ahc;
|
|
ahc->busreset_args_b.bus = 'B';
|
|
|
|
#if defined(__FreeBSD__)
|
|
return (ahc);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
ahc_free(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
#if defined(__FreeBSD__)
|
|
free(ahc, M_DEVBUF);
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
ahc_reset(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
u_int8_t hcntrl;
|
|
int wait;
|
|
|
|
/* Retain the IRQ type accross the chip reset */
|
|
hcntrl = (ahc_inb(ahc, HCNTRL) & IRQMS) | INTEN;
|
|
|
|
ahc_outb(ahc, HCNTRL, CHIPRST | PAUSE);
|
|
/*
|
|
* Ensure that the reset has finished
|
|
*/
|
|
wait = 1000;
|
|
while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK))
|
|
DELAY(1000);
|
|
if (wait == 0) {
|
|
printf("%s: WARNING - Failed chip reset! "
|
|
"Trying to initialize anyway.\n", ahc_name(ahc));
|
|
}
|
|
ahc_outb(ahc, HCNTRL, hcntrl | PAUSE);
|
|
}
|
|
|
|
/*
|
|
* Look up the valid period to SCSIRATE conversion in our table.
|
|
*/
|
|
static void
|
|
ahc_scsirate(ahc, scsirate, period, offset, channel, target )
|
|
struct ahc_softc *ahc;
|
|
u_int8_t *scsirate;
|
|
u_int8_t *period;
|
|
u_int8_t *offset;
|
|
char channel;
|
|
int target;
|
|
{
|
|
int i;
|
|
u_int32_t ultra_enb_addr;
|
|
u_int8_t sxfrctl0;
|
|
u_int8_t ultra_enb;
|
|
|
|
i = ahc_num_syncrates; /* Default to async */
|
|
|
|
if (*period >= ahc_syncrates[0].period && *offset != 0) {
|
|
for (i = 0; i < ahc_num_syncrates; i++) {
|
|
|
|
if (*period <= ahc_syncrates[i].period) {
|
|
/*
|
|
* Watch out for Ultra speeds when ultra is not
|
|
* enabled and vice-versa.
|
|
*/
|
|
if (!(ahc->type & AHC_ULTRA)
|
|
&& (ahc_syncrates[i].sxfr & ULTRA_SXFR)) {
|
|
/*
|
|
* This should only happen if the
|
|
* drive is the first to negotiate
|
|
* and chooses a high rate. We'll
|
|
* just move down the table util
|
|
* we hit a non ultra speed.
|
|
*/
|
|
continue;
|
|
}
|
|
*scsirate = (ahc_syncrates[i].sxfr & 0xF0)
|
|
| (*offset & 0x0f);
|
|
*period = ahc_syncrates[i].period;
|
|
|
|
if (bootverbose) {
|
|
printf("%s: target %d synchronous at "
|
|
"%sMHz, offset = 0x%x\n",
|
|
ahc_name(ahc), target,
|
|
ahc_syncrates[i].rate, *offset );
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (i >= ahc_num_syncrates) {
|
|
/* Use asynchronous transfers. */
|
|
*scsirate = 0;
|
|
*period = 0;
|
|
*offset = 0;
|
|
if (bootverbose)
|
|
printf("%s: target %d using asynchronous transfers\n",
|
|
ahc_name(ahc), target );
|
|
}
|
|
/*
|
|
* Ensure Ultra mode is set properly for
|
|
* this target.
|
|
*/
|
|
ultra_enb_addr = ULTRA_ENB;
|
|
if (channel == 'B' || target > 7)
|
|
ultra_enb_addr++;
|
|
ultra_enb = ahc_inb(ahc, ultra_enb_addr);
|
|
sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
|
|
if (*scsirate != 0 && ahc_syncrates[i].sxfr & ULTRA_SXFR) {
|
|
ultra_enb |= 0x01 << (target & 0x07);
|
|
sxfrctl0 |= FAST20;
|
|
} else {
|
|
ultra_enb &= ~(0x01 << (target & 0x07));
|
|
sxfrctl0 &= ~FAST20;
|
|
}
|
|
ahc_outb(ahc, ultra_enb_addr, ultra_enb);
|
|
ahc_outb(ahc, SXFRCTL0, sxfrctl0);
|
|
}
|
|
|
|
#if defined(__NetBSD__)
|
|
int
|
|
ahcprint(aux, name)
|
|
void *aux;
|
|
char *name;
|
|
{
|
|
if (name != NULL)
|
|
printf("%s: scsibus ", name);
|
|
return UNCONF;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Attach all the sub-devices we can find
|
|
*/
|
|
int
|
|
ahc_attach(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
struct scsibus_data *scbus;
|
|
|
|
#ifdef AHC_BROKEN_CACHE
|
|
if (cpu_class == CPUCLASS_386) /* doesn't have "wbinvd" instruction */
|
|
ahc_broken_cache = 0;
|
|
#endif
|
|
/*
|
|
* fill in the prototype scsi_links.
|
|
*/
|
|
#if defined(__FreeBSD__)
|
|
ahc->sc_link.adapter_unit = ahc->unit;
|
|
ahc->sc_link.adapter_targ = ahc->our_id;
|
|
ahc->sc_link.fordriver = 0;
|
|
#elif defined(__NetBSD__)
|
|
ahc->sc_link.adapter_target = ahc->our_id;
|
|
#endif
|
|
ahc->sc_link.adapter_softc = ahc;
|
|
ahc->sc_link.adapter = &ahc_switch;
|
|
ahc->sc_link.opennings = 2;
|
|
ahc->sc_link.device = &ahc_dev;
|
|
ahc->sc_link.flags = DEBUGLEVEL;
|
|
|
|
if (ahc->type & AHC_TWIN) {
|
|
/* Configure the second scsi bus */
|
|
ahc->sc_link_b = ahc->sc_link;
|
|
#if defined(__FreeBSD__)
|
|
ahc->sc_link_b.adapter_targ = ahc->our_id_b;
|
|
ahc->sc_link_b.adapter_bus = 1;
|
|
ahc->sc_link_b.fordriver = (void *)SELBUSB;
|
|
#elif defined(__NetBSD__)
|
|
ahc->sc_link_b.adapter_target = ahc->our_id_b;
|
|
#endif
|
|
}
|
|
|
|
|
|
#if defined(__FreeBSD__)
|
|
/*
|
|
* Prepare the scsibus_data area for the upperlevel
|
|
* scsi code.
|
|
*/
|
|
scbus = scsi_alloc_bus();
|
|
if(!scbus)
|
|
return 0;
|
|
scbus->adapter_link = (ahc->flags & AHC_CHANNEL_B_PRIMARY) ?
|
|
&ahc->sc_link_b : &ahc->sc_link;
|
|
if (ahc->type & AHC_WIDE)
|
|
scbus->maxtarg = 15;
|
|
|
|
/*
|
|
* ask the adapter what subunits are present
|
|
*/
|
|
if (bootverbose)
|
|
printf("ahc%d: Probing channel %c\n", ahc->unit,
|
|
(ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 'B' : 'A');
|
|
scsi_attachdevs(scbus);
|
|
scbus = NULL; /* Upper-level SCSI code owns this now */
|
|
|
|
if (ahc->type & AHC_TWIN) {
|
|
scbus = scsi_alloc_bus();
|
|
if (!scbus)
|
|
return 0;
|
|
scbus->adapter_link = (ahc->flags & AHC_CHANNEL_B_PRIMARY) ?
|
|
&ahc->sc_link : &ahc->sc_link_b;
|
|
if (ahc->type & AHC_WIDE)
|
|
scbus->maxtarg = 15;
|
|
if (bootverbose)
|
|
printf("ahc%d: Probing Channel %c\n", ahc->unit,
|
|
(ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 'A': 'B');
|
|
scsi_attachdevs(scbus);
|
|
scbus = NULL; /* Upper-level SCSI code owns this now */
|
|
}
|
|
#elif defined(__NetBSD__)
|
|
/*
|
|
* XXX - Update MI SCSI code
|
|
*
|
|
* if(ahc->type & AHC_WIDE)
|
|
* max target of both channel A and B = 15;
|
|
*/
|
|
|
|
/*
|
|
* ask the adapter what subunits are present
|
|
*/
|
|
if ((ahc->flags & AHC_CHANNEL_B_PRIMARY) == 0) {
|
|
/* make IS_SCSIBUS_B() == false, while probing channel A */
|
|
ahc->sc_link_b.scsibus = 0xff;
|
|
|
|
if (ahc->type & AHC_TWIN)
|
|
printf("%s: Probing channel A\n", ahc_name(ahc));
|
|
config_found((void *)ahc, &ahc->sc_link, ahcprint);
|
|
if (ahc->type & AHC_TWIN) {
|
|
printf("%s: Probing channel B\n", ahc_name(ahc));
|
|
config_found((void *)ahc, &ahc->sc_link_b, ahcprint);
|
|
}
|
|
} else {
|
|
/*
|
|
* if implementation of IS_SCSIBUS_B() is changed to use
|
|
* ahc->sc_link.scsibus, then "ahc->sc_link.scsibus = 0xff;"
|
|
* is needed, here.
|
|
*/
|
|
|
|
/* assert(ahc->type & AHC_TWIN); */
|
|
printf("%s: Probing channel B\n", ahc_name(ahc));
|
|
config_found((void *)ahc, &ahc->sc_link_b, ahcprint);
|
|
printf("%s: Probing channel A\n", ahc_name(ahc));
|
|
config_found((void *)ahc, &ahc->sc_link, ahcprint);
|
|
}
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Catch an interrupt from the adapter
|
|
*/
|
|
#if defined(__FreeBSD__)
|
|
void
|
|
#elif defined (__NetBSD__)
|
|
int
|
|
#endif
|
|
ahc_intr(arg)
|
|
void *arg;
|
|
{
|
|
struct ahc_softc *ahc;
|
|
u_int8_t intstat;
|
|
|
|
ahc = (struct ahc_softc *)arg;
|
|
intstat = ahc_inb(ahc, INTSTAT);
|
|
/*
|
|
* Is this interrupt for me? or for
|
|
* someone who is sharing my interrupt?
|
|
*/
|
|
if (!(intstat & INT_PEND))
|
|
#if defined(__FreeBSD__)
|
|
return;
|
|
#elif defined(__NetBSD__)
|
|
return 0;
|
|
#endif
|
|
|
|
if (intstat & CMDCMPLT) {
|
|
struct scb *scb;
|
|
u_int8_t scb_index;
|
|
u_int8_t qoutcnt;
|
|
int int_cleared;
|
|
|
|
int_cleared = 0;
|
|
while (qoutcnt = (ahc_inb(ahc, QOUTCNT) & ahc->qcntmask)) {
|
|
for (; qoutcnt > 0; qoutcnt--) {
|
|
scb_index = ahc_inb(ahc, QOUTFIFO);
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
if (!scb || !(scb->flags & SCB_ACTIVE)) {
|
|
printf("%s: WARNING "
|
|
"no command for scb %d "
|
|
"(cmdcmplt)\nQOUTCNT == %d\n",
|
|
ahc_name(ahc), scb_index,
|
|
qoutcnt);
|
|
continue;
|
|
}
|
|
/*
|
|
* Save off the residual if there is one.
|
|
*/
|
|
if (scb->hscb->residual_SG_segment_count != 0)
|
|
ahc_calc_residual(scb);
|
|
if ((scb->flags & SCB_QUEUED_ABORT) != 0) {
|
|
/* Have to clean up any possible
|
|
* entries in the waiting queue and
|
|
* QINFIFO.
|
|
*/
|
|
int target;
|
|
char channel;
|
|
int lun;
|
|
u_int8_t tag;
|
|
|
|
tag = SCB_LIST_NULL;
|
|
target = scb->xs->sc_link->target;
|
|
lun = scb->xs->sc_link->lun;
|
|
channel = (scb->hscb->tcl & SELBUSB)
|
|
? 'B': 'A';
|
|
if (scb->hscb->control & TAG_ENB)
|
|
tag = scb->hscb->tag;
|
|
ahc_reset_device(ahc,
|
|
target,
|
|
channel,
|
|
lun,
|
|
tag,
|
|
scb->xs->error);
|
|
ahc_run_done_queue(ahc);
|
|
}
|
|
ahc_done(ahc, scb);
|
|
}
|
|
ahc_outb(ahc, CLRINT, CLRCMDINT);
|
|
int_cleared++;
|
|
}
|
|
|
|
if (int_cleared == 0)
|
|
ahc_outb(ahc, CLRINT, CLRCMDINT);
|
|
}
|
|
if (intstat & BRKADRINT) {
|
|
/*
|
|
* We upset the sequencer :-(
|
|
* Lookup the error message
|
|
*/
|
|
int i, error, num_errors;
|
|
|
|
error = ahc_inb(ahc, ERROR);
|
|
num_errors = sizeof(hard_error)/sizeof(hard_error[0]);
|
|
for (i = 0; error != 1 && i < num_errors; i++)
|
|
error >>= 1;
|
|
printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
|
|
ahc_name(ahc), hard_error[i].errmesg,
|
|
(ahc_inb(ahc, SEQADDR1) << 8) |
|
|
ahc_inb(ahc, SEQADDR0));
|
|
|
|
ahc_reset_device(ahc, ALL_TARGETS, ALL_CHANNELS, ALL_LUNS,
|
|
SCB_LIST_NULL, XS_DRIVER_STUFFUP);
|
|
ahc_run_done_queue(ahc);
|
|
}
|
|
if (intstat & SEQINT)
|
|
ahc_handle_seqint(ahc, intstat);
|
|
|
|
if (intstat & SCSIINT)
|
|
ahc_handle_scsiint(ahc, intstat);
|
|
|
|
if (ahc->waiting_scbs.stqh_first != NULL)
|
|
ahc_run_waiting_queue(ahc);
|
|
#if defined(__NetBSD__)
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
ahc_handle_seqint(ahc, intstat)
|
|
struct ahc_softc *ahc;
|
|
u_int8_t intstat;
|
|
{
|
|
struct scb *scb;
|
|
u_int16_t targ_mask;
|
|
u_int8_t target;
|
|
int scratch_offset;
|
|
char channel;
|
|
|
|
if ((ahc_inb(ahc, SEQ_FLAGS) & RESELECTED) != 0)
|
|
target = ahc_inb(ahc, SELID);
|
|
else
|
|
target = ahc_inb(ahc, SCSIID);
|
|
target = (target >> 4) & 0x0f;
|
|
scratch_offset = target;
|
|
channel = ahc_inb(ahc, SBLKCTL) & SELBUSB ? 'B': 'A';
|
|
if (channel == 'B')
|
|
scratch_offset += 8;
|
|
targ_mask = (0x01 << scratch_offset);
|
|
|
|
switch (intstat & SEQINT_MASK) {
|
|
case NO_MATCH:
|
|
{
|
|
/*
|
|
* This could be for a normal abort request.
|
|
* Figure out the SCB that we were trying to find
|
|
* and only give an error if we didn't ask for this
|
|
* to happen.
|
|
*/
|
|
u_int8_t scb_index;
|
|
u_int8_t busy_scbid;
|
|
|
|
busy_scbid = ahc_index_busy_target(ahc, target, channel,
|
|
/*unbusy*/FALSE);
|
|
scb_index = ahc_inb(ahc, ARG_1);
|
|
|
|
if (scb_index == SCB_LIST_NULL)
|
|
/* Untagged Request */
|
|
scb_index = busy_scbid;
|
|
|
|
if (scb_index < ahc->scb_data->numscbs) {
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
|
|
if (scb->hscb->control & ABORT_SCB) {
|
|
/*
|
|
* We expected this. Let the busfree
|
|
* handler take care of this when we
|
|
* the abort is finially sent.
|
|
* Set IDENTIFY_SEEN so that the busfree
|
|
* handler knows that there is an SCB to
|
|
* cleanup.
|
|
*/
|
|
ahc_outb(ahc, SEQ_FLAGS, ahc_inb(ahc, SEQ_FLAGS)
|
|
| IDENTIFY_SEEN);
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("reconnect SCB abort successfull\n");
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* We expect a busfree to occur, so don't bother to interrupt
|
|
* when it happens - we've already handled the error.
|
|
*/
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
|
|
|
|
busy_scbid = ahc_index_busy_target(ahc, target, channel,
|
|
/*unbusy*/TRUE);
|
|
|
|
printf("%s:%c:%d: no active SCB for reconnecting "
|
|
"target - issuing ABORT\n",
|
|
ahc_name(ahc), channel, target);
|
|
printf("SAVED_TCL == 0x%x\n",
|
|
ahc_inb(ahc, SAVED_TCL));
|
|
break;
|
|
}
|
|
case NO_MATCH_BUSY:
|
|
{
|
|
/*
|
|
* XXX Leave this as a panic for the time being since
|
|
* it indicates a bug in the timeout code for this
|
|
* to happen.
|
|
*/
|
|
u_int8_t scb_index;
|
|
u_int8_t busy_scbindex;
|
|
|
|
scb_index = ahc_inb(ahc, CUR_SCBID);
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
|
|
panic("%s:%c:%d: Target busy link failure.\n",
|
|
ahc_name(ahc), (scb->hscb->tcl & SELBUSB) ? 'B' : 'A',
|
|
scb->xs->sc_link->target);
|
|
}
|
|
case SEND_REJECT:
|
|
{
|
|
u_int8_t rejbyte = ahc_inb(ahc, REJBYTE);
|
|
printf("%s:%c:%d: Warning - unknown message received from "
|
|
"target (0x%x). Rejecting\n",
|
|
ahc_name(ahc), channel, target, rejbyte);
|
|
break;
|
|
}
|
|
case NO_IDENT:
|
|
{
|
|
/*
|
|
* The reconnecting target either did not send an identify
|
|
* message, or did, but we didn't find and SCB to match and
|
|
* before it could respond to our ATN/abort, it hit a dataphase.
|
|
* The only safe thing to do is to blow it away with a bus
|
|
* reset.
|
|
*/
|
|
int found;
|
|
|
|
printf("%s:%c:%d: Target did not send an IDENTIFY message. "
|
|
"LASTPHASE = 0x%x, SAVED_TCL == 0x%x\n",
|
|
ahc_name(ahc), channel, target, ahc_inb(ahc, LASTPHASE),
|
|
ahc_inb(ahc, SAVED_TCL));
|
|
found = ahc_reset_channel(ahc, channel, XS_TIMEOUT,
|
|
/*initiate reset*/TRUE);
|
|
printf("%s: Issued Channel %c Bus Reset. "
|
|
"%d SCBs aborted\n", ahc_name(ahc), channel, found);
|
|
break;
|
|
}
|
|
case BAD_PHASE:
|
|
if (ahc_inb(ahc, LASTPHASE) == P_BUSFREE) {
|
|
printf("%s:%c:%d: Missed busfree.\n", ahc_name(ahc),
|
|
channel, target);
|
|
restart_sequencer(ahc);
|
|
} else {
|
|
printf("%s:%c:%d: unknown scsi bus phase. Attempting "
|
|
"to continue\n", ahc_name(ahc), channel, target);
|
|
}
|
|
break;
|
|
case EXTENDED_MSG:
|
|
{
|
|
u_int8_t message_length;
|
|
u_int8_t message_code;
|
|
u_int8_t scb_index;
|
|
|
|
message_length = ahc_inb(ahc, MSGIN_EXT_LEN);
|
|
message_code = ahc_inb(ahc, MSGIN_EXT_OPCODE);
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
switch (message_code) {
|
|
case MSG_EXT_SDTR:
|
|
{
|
|
u_int8_t period;
|
|
u_int8_t offset;
|
|
u_int8_t saved_offset;
|
|
u_int8_t targ_scratch;
|
|
u_int8_t maxoffset;
|
|
u_int8_t rate;
|
|
|
|
if (message_length != MSG_EXT_SDTR_LEN) {
|
|
ahc_outb(ahc, RETURN_1, SEND_REJ);
|
|
break;
|
|
}
|
|
period = ahc_inb(ahc, MSGIN_EXT_BYTES);
|
|
saved_offset = ahc_inb(ahc, MSGIN_EXT_BYTES + 1);
|
|
targ_scratch = ahc_inb(ahc, TARG_SCRATCH
|
|
+ scratch_offset);
|
|
if (targ_scratch & WIDEXFER)
|
|
maxoffset = MAX_OFFSET_16BIT;
|
|
else
|
|
maxoffset = MAX_OFFSET_8BIT;
|
|
offset = MIN(saved_offset, maxoffset);
|
|
ahc_scsirate(ahc, &rate, &period, &offset,
|
|
channel, target);
|
|
/* Preserve the WideXfer flag */
|
|
targ_scratch = rate | (targ_scratch & WIDEXFER);
|
|
|
|
/*
|
|
* Update both the target scratch area and the
|
|
* current SCSIRATE.
|
|
*/
|
|
ahc_outb(ahc, TARG_SCRATCH + scratch_offset,
|
|
targ_scratch);
|
|
ahc_outb(ahc, SCSIRATE, targ_scratch);
|
|
|
|
/*
|
|
* See if we initiated Sync Negotiation
|
|
* and didn't have to fall down to async
|
|
* transfers.
|
|
*/
|
|
if ((scb->flags & SCB_MSGOUT_SDTR) != 0) {
|
|
/* We started it */
|
|
if (saved_offset == offset) {
|
|
/*
|
|
* Don't send an SDTR back to
|
|
* the target
|
|
*/
|
|
ahc_outb(ahc, RETURN_1, 0);
|
|
} else
|
|
/* Went too low - force async */
|
|
ahc_outb(ahc, RETURN_1, SEND_REJ);
|
|
} else {
|
|
/*
|
|
* Send our own SDTR in reply
|
|
*/
|
|
printf("Sending SDTR!!\n");
|
|
ahc_construct_sdtr(ahc, /*start_byte*/0,
|
|
period, offset);
|
|
ahc_outb(ahc, RETURN_1, SEND_MSG);
|
|
}
|
|
ahc->needsdtr &= ~targ_mask;
|
|
break;
|
|
}
|
|
case MSG_EXT_WDTR:
|
|
{
|
|
u_int8_t scratch, bus_width;
|
|
|
|
if (message_length != MSG_EXT_WDTR_LEN) {
|
|
ahc_outb(ahc, RETURN_1, SEND_REJ);
|
|
break;
|
|
}
|
|
|
|
bus_width = ahc_inb(ahc, MSGIN_EXT_BYTES);
|
|
scratch = ahc_inb(ahc, TARG_SCRATCH + scratch_offset);
|
|
|
|
if ((scb->flags & SCB_MSGOUT_WDTR) != 0) {
|
|
/*
|
|
* Don't send a WDTR back to the
|
|
* target, since we asked first.
|
|
*/
|
|
ahc_outb(ahc, RETURN_1, 0);
|
|
switch (bus_width){
|
|
case BUS_8_BIT:
|
|
scratch &= 0x7f;
|
|
break;
|
|
case BUS_16_BIT:
|
|
if (bootverbose)
|
|
printf("%s: target %d using "
|
|
"16Bit transfers\n",
|
|
ahc_name(ahc), target);
|
|
scratch |= WIDEXFER;
|
|
break;
|
|
case BUS_32_BIT:
|
|
/*
|
|
* How can we do 32bit transfers
|
|
* on a 16bit bus?
|
|
*/
|
|
ahc_outb(ahc, RETURN_1, SEND_REJ);
|
|
printf("%s: target %d requested 32Bit "
|
|
"transfers. Rejecting...\n",
|
|
ahc_name(ahc), target);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* Send our own WDTR in reply
|
|
*/
|
|
switch (bus_width) {
|
|
case BUS_8_BIT:
|
|
scratch &= 0x7f;
|
|
break;
|
|
case BUS_32_BIT:
|
|
case BUS_16_BIT:
|
|
if (ahc->type & AHC_WIDE) {
|
|
/* Negotiate 16_BITS */
|
|
bus_width = BUS_16_BIT;
|
|
if (bootverbose)
|
|
printf("%s: target %d "
|
|
"using 16Bit "
|
|
"transfers\n",
|
|
ahc_name(ahc),
|
|
target);
|
|
scratch |= WIDEXFER;
|
|
} else
|
|
bus_width = BUS_8_BIT;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
ahc_construct_wdtr(ahc, /*start_byte*/0,
|
|
bus_width);
|
|
ahc_outb(ahc, RETURN_1, SEND_MSG);
|
|
}
|
|
ahc->needwdtr &= ~targ_mask;
|
|
ahc_outb(ahc, TARG_SCRATCH + scratch_offset, scratch);
|
|
ahc_outb(ahc, SCSIRATE, scratch);
|
|
break;
|
|
}
|
|
default:
|
|
/* Unknown extended message. Reject it. */
|
|
ahc_outb(ahc, RETURN_1, SEND_REJ);
|
|
}
|
|
break;
|
|
}
|
|
case REJECT_MSG:
|
|
{
|
|
/*
|
|
* What we care about here is if we had an
|
|
* outstanding SDTR or WDTR message for this
|
|
* target. If we did, this is a signal that
|
|
* the target is refusing negotiation.
|
|
*/
|
|
|
|
u_int8_t targ_scratch;
|
|
u_int8_t scb_index;
|
|
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
|
|
targ_scratch = ahc_inb(ahc, TARG_SCRATCH
|
|
+ scratch_offset);
|
|
|
|
if ((scb->flags & SCB_MSGOUT_WDTR) != 0) {
|
|
/* note 8bit xfers and clear flag */
|
|
targ_scratch &= 0x7f;
|
|
ahc->needwdtr &= ~targ_mask;
|
|
printf("%s:%c:%d: refuses WIDE negotiation. Using "
|
|
"8bit transfers\n", ahc_name(ahc),
|
|
channel, target);
|
|
} else if ((scb->flags & SCB_MSGOUT_SDTR) != 0) {
|
|
/* note asynch xfers and clear flag */
|
|
targ_scratch &= 0xf0;
|
|
ahc->needsdtr &= ~targ_mask;
|
|
printf("%s:%c:%d: refuses synchronous negotiation. "
|
|
"Using asynchronous transfers\n",
|
|
ahc_name(ahc),
|
|
channel, target);
|
|
} else {
|
|
/*
|
|
* Otherwise, we ignore it.
|
|
*/
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOWMISC)
|
|
printf("%s:%c:%d: Message reject -- ignored\n",
|
|
ahc_name(ahc), channel, target);
|
|
#endif
|
|
break;
|
|
}
|
|
ahc_outb(ahc, TARG_SCRATCH + scratch_offset, targ_scratch);
|
|
ahc_outb(ahc, SCSIRATE, targ_scratch);
|
|
break;
|
|
}
|
|
case BAD_STATUS:
|
|
{
|
|
u_int8_t scb_index;
|
|
struct scsi_xfer *xs;
|
|
struct hardware_scb *hscb;
|
|
|
|
/*
|
|
* The sequencer will notify us when a command
|
|
* has an error that would be of interest to
|
|
* the kernel. This allows us to leave the sequencer
|
|
* running in the common case of command completes
|
|
* without error. The sequencer will already have
|
|
* dma'd the SCB back up to us, so we can reference
|
|
* the in kernel copy directly.
|
|
*/
|
|
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
hscb = scb->hscb;
|
|
|
|
/*
|
|
* Set the default return value to 0 (don't
|
|
* send sense). The sense code will change
|
|
* this if needed and this reduces code
|
|
* duplication.
|
|
*/
|
|
ahc_outb(ahc, RETURN_1, 0);
|
|
if (!(scb && (scb->flags & SCB_ACTIVE))) {
|
|
printf("%s:%c:%d: ahc_intr - referenced scb "
|
|
"not valid during seqint 0x%x scb(%d)\n",
|
|
ahc_name(ahc),
|
|
channel, target, intstat,
|
|
scb_index);
|
|
goto clear;
|
|
}
|
|
|
|
xs = scb->xs;
|
|
|
|
xs->status = hscb->status;
|
|
switch (hscb->status){
|
|
case SCSI_OK:
|
|
printf("%s: Interrupted for staus of"
|
|
" 0???\n", ahc_name(ahc));
|
|
break;
|
|
case SCSI_CHECK:
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOWSENSE) {
|
|
sc_print_addr(xs->sc_link);
|
|
printf("SCB %d: requests Check Status\n",
|
|
scb->hscb->tag);
|
|
}
|
|
#endif
|
|
|
|
if ((xs->error == XS_NOERROR)
|
|
&& !(scb->flags & SCB_SENSE)) {
|
|
struct ahc_dma_seg *sg = scb->ahc_dma;
|
|
struct scsi_sense *sc = &(scb->sense_cmd);
|
|
|
|
/*
|
|
* Save off the residual if there is one.
|
|
*/
|
|
if (hscb->residual_SG_segment_count != 0)
|
|
ahc_calc_residual(scb);
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOWSENSE) {
|
|
sc_print_addr(xs->sc_link);
|
|
printf("Sending Sense\n");
|
|
}
|
|
#endif
|
|
#if defined(__FreeBSD__)
|
|
sc->op_code = REQUEST_SENSE;
|
|
#elif defined(__NetBSD__)
|
|
sc->opcode = REQUEST_SENSE;
|
|
#endif
|
|
sc->byte2 = xs->sc_link->lun << 5;
|
|
sc->length = sizeof(struct scsi_sense_data);
|
|
sc->control = 0;
|
|
|
|
sg->addr = vtophys(&xs->sense);
|
|
sg->len = sizeof(struct scsi_sense_data);
|
|
|
|
hscb->control &= DISCENB;
|
|
hscb->status = 0;
|
|
hscb->SG_segment_count = 1;
|
|
hscb->SG_list_pointer = vtophys(sg);
|
|
hscb->data = sg->addr;
|
|
/* Maintain SCB_LINKED_NEXT */
|
|
hscb->datalen &= 0xFF000000;
|
|
hscb->datalen |= sg->len;
|
|
hscb->cmdpointer = vtophys(sc);
|
|
hscb->cmdlen = sizeof(*sc);
|
|
scb->sg_count = hscb->SG_segment_count;
|
|
scb->flags |= SCB_SENSE;
|
|
/*
|
|
* Ensure the target is busy since this
|
|
* will be an untagged request.
|
|
*/
|
|
ahc_busy_target(ahc, target, channel,
|
|
hscb->tag);
|
|
ahc_outb(ahc, RETURN_1, SEND_SENSE);
|
|
|
|
/*
|
|
* Ensure we have enough time to actually
|
|
* retrieve the sense.
|
|
*/
|
|
untimeout(ahc_timeout, (caddr_t)scb);
|
|
timeout(ahc_timeout, (caddr_t)scb, hz);
|
|
break;
|
|
}
|
|
/*
|
|
* Clear the SCB_SENSE Flag and have
|
|
* the sequencer do a normal command
|
|
* complete with either a "DRIVER_STUFFUP"
|
|
* error or whatever other error condition
|
|
* we already had.
|
|
*/
|
|
scb->flags &= ~SCB_SENSE;
|
|
if (xs->error == XS_NOERROR)
|
|
xs->error = XS_DRIVER_STUFFUP;
|
|
break;
|
|
case SCSI_QUEUE_FULL:
|
|
if (scb->hscb->control & TAG_ENB) {
|
|
/*
|
|
* The upper level SCSI code in 3.0
|
|
* handles this properly...
|
|
*/
|
|
struct scsi_link *sc_link;
|
|
|
|
sc_link = xs->sc_link;
|
|
if (sc_link->active > 2
|
|
&& sc_link->opennings != 0) {
|
|
/* truncate the opennings */
|
|
sc_link->opennings = 0;
|
|
sc_print_addr(sc_link);
|
|
printf("Tagged openings reduced to "
|
|
"%d\n", sc_link->active);
|
|
}
|
|
/*
|
|
* XXX requeue this unconditionally.
|
|
*/
|
|
scb->xs->retries++;
|
|
scb->xs->error = XS_BUSY;
|
|
break;
|
|
}
|
|
/* Else treat as if it is a BUSY condition */
|
|
scb->hscb->status = SCSI_BUSY;
|
|
/* Fall Through... */
|
|
case SCSI_BUSY:
|
|
xs->error = XS_BUSY;
|
|
sc_print_addr(xs->sc_link);
|
|
printf("Target Busy\n");
|
|
break;
|
|
default:
|
|
sc_print_addr(xs->sc_link);
|
|
printf("unexpected targ_status: %x\n", hscb->status);
|
|
xs->error = XS_DRIVER_STUFFUP;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case AWAITING_MSG:
|
|
{
|
|
int scb_index;
|
|
u_int8_t message_offset;
|
|
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
|
|
/*
|
|
* This SCB had MK_MESSAGE set in its control byte,
|
|
* informing the sequencer that we wanted to send a
|
|
* special message to this target.
|
|
*/
|
|
message_offset = ahc_inb(ahc, MSG_LEN);
|
|
if (scb->flags & SCB_DEVICE_RESET) {
|
|
ahc_outb(ahc, MSG_OUT, MSG_BUS_DEV_RESET);
|
|
ahc_outb(ahc, MSG_LEN, 1);
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("Bus Device Reset Message Sent\n");
|
|
} else if (scb->flags & SCB_ABORT) {
|
|
if ((scb->hscb->control & TAG_ENB) != 0)
|
|
ahc_outb(ahc, MSG_OUT + message_offset,
|
|
MSG_ABORT_TAG);
|
|
else
|
|
ahc_outb(ahc, MSG_OUT + message_offset,
|
|
MSG_ABORT);
|
|
ahc_outb(ahc, MSG_LEN, message_offset + 1);
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("Abort Message Sent\n");
|
|
} else if (scb->flags & SCB_MSGOUT_WDTR) {
|
|
ahc_construct_wdtr(ahc, message_offset, BUS_16_BIT);
|
|
} else if (scb->flags & SCB_MSGOUT_SDTR) {
|
|
int sxfr;
|
|
int i;
|
|
u_int16_t ultraenable;
|
|
u_int8_t target_scratch;
|
|
|
|
/* Pull the user defined setting */
|
|
target_scratch = ahc_inb(ahc, TARG_SCRATCH
|
|
+ scratch_offset);
|
|
|
|
sxfr = target_scratch & SXFR;
|
|
ultraenable = ahc_inb(ahc, ULTRA_ENB)
|
|
| (ahc_inb(ahc, ULTRA_ENB + 1) << 8);
|
|
|
|
if (ultraenable & targ_mask)
|
|
/* Want an ultra speed in the table */
|
|
sxfr |= 0x100;
|
|
|
|
for (i = 0; i < ahc_num_syncrates; i++)
|
|
if (sxfr == ahc_syncrates[i].sxfr)
|
|
break;
|
|
|
|
ahc_construct_sdtr(ahc, message_offset,
|
|
ahc_syncrates[i].period,
|
|
(target_scratch & WIDEXFER) ?
|
|
MAX_OFFSET_16BIT : MAX_OFFSET_8BIT);
|
|
} else
|
|
panic("ahc_intr: AWAITING_MSG for an SCB that "
|
|
"does not have a waiting message");
|
|
break;
|
|
}
|
|
case DATA_OVERRUN:
|
|
{
|
|
/*
|
|
* When the sequencer detects an overrun, it
|
|
* sets STCNT to 0x00ffffff and allows the
|
|
* target to complete its transfer in
|
|
* BITBUCKET mode.
|
|
*/
|
|
u_int8_t scbindex = ahc_inb(ahc, SCB_TAG);
|
|
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
|
|
u_int32_t overrun;
|
|
int i;
|
|
scb = ahc->scb_data->scbarray[scbindex];
|
|
overrun = ahc_inb(ahc, STCNT)
|
|
| (ahc_inb(ahc, STCNT + 1) << 8)
|
|
| (ahc_inb(ahc, STCNT + 2) << 16);
|
|
overrun = 0x00ffffff - overrun;
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("data overrun of %d bytes detected in %s phase."
|
|
" Tag == 0x%x. Forcing a retry.\n", overrun,
|
|
lastphase == P_DATAIN ? "Data-In" : "Data-Out",
|
|
scb->hscb->tag);
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("%s seen Data Phase. Length = %d. NumSGs = %d.\n",
|
|
ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
|
|
scb->xs->datalen, scb->sg_count);
|
|
for (i = 0; i < scb->sg_count; i++) {
|
|
printf("sg[%d] - Addr 0x%x : Length %d\n",
|
|
i,
|
|
scb->ahc_dma[i].addr,
|
|
scb->ahc_dma[i].len);
|
|
}
|
|
/*
|
|
* Set this and it will take affect when the
|
|
* target does a command complete.
|
|
*/
|
|
scb->xs->error = XS_DRIVER_STUFFUP;
|
|
break;
|
|
}
|
|
#if NOT_YET
|
|
/* XXX Fill these in later */
|
|
case MESG_BUFFER_BUSY:
|
|
break;
|
|
case MSGIN_PHASEMIS:
|
|
break;
|
|
#endif
|
|
#if 0
|
|
case SCB_TRACE_POINT:
|
|
{
|
|
/*
|
|
* Print out the bus phase
|
|
*/
|
|
char *phase;
|
|
u_int8_t scbindex = ahc_inb(ahc, SCB_TAG);
|
|
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
|
|
|
|
scb = ahc->scb_data->scbarray[scbindex];
|
|
sc_print_addr(scb->xs->sc_link);
|
|
|
|
switch (lastphase) {
|
|
case P_DATAOUT:
|
|
phase = "Data-Out";
|
|
break;
|
|
case P_DATAIN:
|
|
phase = "Data-In";
|
|
break;
|
|
case P_COMMAND:
|
|
phase = "Command";
|
|
break;
|
|
case P_MESGOUT:
|
|
phase = "Message-Out";
|
|
break;
|
|
case P_STATUS:
|
|
phase = "Status";
|
|
break;
|
|
case P_MESGIN:
|
|
phase = "Message-In";
|
|
break;
|
|
default:
|
|
phase = "busfree";
|
|
break;
|
|
}
|
|
printf("- %s\n", phase);
|
|
break;
|
|
}
|
|
#endif
|
|
case ABORT_CMDCMPLT:
|
|
/* This interrupt serves to pause the sequencer
|
|
* until we can clean up the QOUTFIFO allowing us
|
|
* to hanle any abort SCBs that may have completed
|
|
* yet still have an SCB in the QINFIFO or
|
|
* waiting for selection queue. By the time we get
|
|
* here, we should have already cleaned up the
|
|
* queues, so all we need to do is unpause the sequencer.
|
|
*/
|
|
break;
|
|
default:
|
|
printf("ahc_intr: seqint, "
|
|
"intstat == 0x%x, scsisigi = 0x%x\n",
|
|
intstat, ahc_inb(ahc, SCSISIGI));
|
|
break;
|
|
}
|
|
|
|
clear:
|
|
/*
|
|
* Clear the upper byte that holds SEQINT status
|
|
* codes and clear the SEQINT bit.
|
|
*/
|
|
ahc_outb(ahc, CLRINT, CLRSEQINT);
|
|
|
|
/*
|
|
* The sequencer is paused immediately on
|
|
* a SEQINT, so we should restart it when
|
|
* we're done.
|
|
*/
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
}
|
|
|
|
static void
|
|
ahc_handle_scsiint(ahc, intstat)
|
|
struct ahc_softc *ahc;
|
|
u_int8_t intstat;
|
|
{
|
|
u_int8_t scb_index;
|
|
u_int8_t status;
|
|
struct scb *scb;
|
|
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
status = ahc_inb(ahc, SSTAT1);
|
|
|
|
if (scb_index < ahc->scb_data->numscbs) {
|
|
scb = ahc->scb_data->scbarray[scb_index];
|
|
if ((scb->flags & SCB_ACTIVE) == 0)
|
|
scb = NULL;
|
|
} else
|
|
scb = NULL;
|
|
|
|
if ((status & SCSIRSTI) != 0) {
|
|
char channel;
|
|
channel = (ahc_inb(ahc, SBLKCTL) & SELBUSB) ? 'B' : 'A';
|
|
printf("%s: Someone reset channel %c\n",
|
|
ahc_name(ahc), channel);
|
|
ahc_reset_channel(ahc,
|
|
channel,
|
|
XS_BUSY,
|
|
/* Initiate Reset */FALSE);
|
|
scb = NULL;
|
|
} else if ((status & BUSFREE) != 0 && (status & SELTO) == 0) {
|
|
/*
|
|
* First look at what phase we were last in.
|
|
* If its message out, chances are pretty good
|
|
* that the busfree was in response to one of
|
|
* our abort requests.
|
|
*/
|
|
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
|
|
u_int8_t target = (ahc_inb(ahc, SCSIID) >> 4) & 0x0f;
|
|
u_int8_t scbptr = ahc_inb(ahc, SCBPTR);
|
|
u_int8_t scb_control = ahc_inb(ahc, SCB_CONTROL);
|
|
char channel = ahc_inb(ahc, SBLKCTL) & SELBUSB ? 'B': 'A';
|
|
int printerror = 1;
|
|
|
|
ahc_outb(ahc, SCSISEQ, 0);
|
|
if (lastphase != P_BUSFREE) {
|
|
u_int8_t flags = ahc_inb(ahc, SEQ_FLAGS)
|
|
& (IDENTIFY_SEEN|RESELECTED);
|
|
|
|
if (flags == 0 || flags == (IDENTIFY_SEEN|RESELECTED)) {
|
|
/*
|
|
* We have an SCB we have to clean up.
|
|
*/
|
|
if ((scb_control & DISCONNECTED) != 0)
|
|
ahc_rem_scb_from_disc_list(ahc, scbptr);
|
|
else {
|
|
ahc_add_curscb_to_free_list(ahc);
|
|
}
|
|
|
|
/* Did we ask for this?? */
|
|
if ((lastphase == P_MESGOUT
|
|
|| lastphase == P_MESGIN) && scb != NULL) {
|
|
if (scb->flags & SCB_DEVICE_RESET) {
|
|
ahc_handle_devreset(ahc, scb);
|
|
scb = NULL;
|
|
printerror = 0;
|
|
} else if (scb->flags & SCB_ABORT) {
|
|
struct hardware_scb *hscb;
|
|
u_int8_t tag;
|
|
int lun;
|
|
|
|
hscb = scb->hscb;
|
|
tag = SCB_LIST_NULL;
|
|
lun = hscb->tcl & 0x7;
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("SCB %d - Abort "
|
|
"Completed.\n",
|
|
scbptr);
|
|
if (hscb->control & TAG_ENB)
|
|
tag = scb->hscb->tag;
|
|
ahc_reset_device(ahc,
|
|
target,
|
|
channel,
|
|
lun,
|
|
tag,
|
|
XS_TIMEOUT);
|
|
ahc_run_done_queue(ahc);
|
|
scb = NULL;
|
|
printerror = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (printerror != 0) {
|
|
if (scb != NULL) {
|
|
u_int8_t next;
|
|
ahc_index_busy_target(ahc, target,
|
|
channel, /*unbusy*/TRUE);
|
|
|
|
ahc_outb(ahc, SCBPTR, scbptr);
|
|
next = ahc_inb(ahc, SCB_LINKED_NEXT);
|
|
if (next != SCB_LIST_NULL) {
|
|
/*
|
|
* Re-queue the waiting SCB via the
|
|
* waiting list.
|
|
*/
|
|
struct scb *next_scb;
|
|
|
|
next_scb =
|
|
ahc->scb_data->scbarray[next];
|
|
STAILQ_INSERT_HEAD(&ahc->waiting_scbs,
|
|
next_scb, links);
|
|
next_scb->flags |= SCB_WAITINGQ;
|
|
}
|
|
scb->xs->error = XS_TIMEOUT;
|
|
sc_print_addr(scb->xs->sc_link);
|
|
ahc_done(ahc, scb);
|
|
scb = NULL;
|
|
} else {
|
|
printf("%s: ", ahc_name(ahc));
|
|
}
|
|
printf("Unexpected busfree. LASTPHASE == 0x%x\n"
|
|
"SEQADDR == 0x%x\n",
|
|
lastphase, (ahc_inb(ahc, SEQADDR1) << 8)
|
|
| ahc_inb(ahc, SEQADDR0));
|
|
}
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
|
|
ahc_outb(ahc, CLRSINT1, CLRBUSFREE);
|
|
restart_sequencer(ahc);
|
|
ahc_outb(ahc, CLRINT, CLRSCSIINT);
|
|
} else if (scb == NULL) {
|
|
printf("%s: ahc_intr - referenced scb not "
|
|
"valid during scsiint 0x%x scb(%d)\n"
|
|
"SIMODE0 = 0x%x, SIMODE1 = 0x%x, SSTAT0 = 0x%x\n"
|
|
"SEQADDR = 0x%x\n", ahc_name(ahc),
|
|
status, scb_index, ahc_inb(ahc, SIMODE0),
|
|
ahc_inb(ahc, SIMODE1), ahc_inb(ahc, SSTAT0),
|
|
(ahc_inb(ahc, SEQADDR1) << 8)
|
|
| ahc_inb(ahc, SEQADDR0));
|
|
ahc_outb(ahc, CLRSINT1, status);
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
ahc_outb(ahc, CLRINT, CLRSCSIINT);
|
|
scb = NULL;
|
|
} else if ((status & SCSIPERR) != 0) {
|
|
/*
|
|
* Determine the bus phase and
|
|
* queue an appropriate message
|
|
*/
|
|
char *phase;
|
|
u_int8_t mesg_out = MSG_NOOP;
|
|
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
|
|
struct scsi_xfer *xs;
|
|
|
|
xs = scb->xs;
|
|
sc_print_addr(xs->sc_link);
|
|
|
|
switch (lastphase) {
|
|
case P_DATAOUT:
|
|
phase = "Data-Out";
|
|
break;
|
|
case P_DATAIN:
|
|
phase = "Data-In";
|
|
mesg_out = MSG_INITIATOR_DET_ERR;
|
|
break;
|
|
case P_COMMAND:
|
|
phase = "Command";
|
|
break;
|
|
case P_MESGOUT:
|
|
phase = "Message-Out";
|
|
break;
|
|
case P_STATUS:
|
|
phase = "Status";
|
|
mesg_out = MSG_INITIATOR_DET_ERR;
|
|
break;
|
|
case P_MESGIN:
|
|
phase = "Message-In";
|
|
mesg_out = MSG_PARITY_ERROR;
|
|
break;
|
|
default:
|
|
phase = "unknown";
|
|
break;
|
|
}
|
|
printf("parity error during %s phase.\n", phase);
|
|
|
|
/*
|
|
* We've set the hardware to assert ATN if we
|
|
* get a parity error on "in" phases, so all we
|
|
* need to do is stuff the message buffer with
|
|
* the appropriate message. "In" phases have set
|
|
* mesg_out to something other than MSG_NOP.
|
|
*/
|
|
if (mesg_out != MSG_NOOP) {
|
|
ahc_outb(ahc, MSG_OUT, mesg_out);
|
|
ahc_outb(ahc, MSG_LEN, 1);
|
|
scb = NULL;
|
|
} else
|
|
/*
|
|
* Should we allow the target to make
|
|
* this decision for us? If we get a
|
|
* sense request from the drive, we will
|
|
* not fetch it since xs->error != XS_NOERROR.
|
|
* perhaps we need two error fields in the
|
|
* xs structure?
|
|
*/
|
|
xs->error = XS_DRIVER_STUFFUP;
|
|
ahc_outb(ahc, CLRSINT1, CLRSCSIPERR);
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
ahc_outb(ahc, CLRINT, CLRSCSIINT);
|
|
} else if ((status & SELTO) != 0) {
|
|
struct scsi_xfer *xs;
|
|
u_int8_t scbptr;
|
|
u_int8_t nextscb;
|
|
|
|
/*
|
|
* XXX If we queued an abort tag, go clean up the
|
|
* disconnected list.
|
|
*/
|
|
xs = scb->xs;
|
|
xs->error = XS_SELTIMEOUT;
|
|
/*
|
|
* Clear any pending messages for the timed out
|
|
* target, and mark the target as free
|
|
*/
|
|
ahc_outb(ahc, MSG_LEN, 0);
|
|
ahc_index_busy_target(ahc, xs->sc_link->target,
|
|
IS_SCSIBUS_B(ahc, xs->sc_link) ? 'B' : 'A',
|
|
/*unbusy*/TRUE);
|
|
/* Stop the selection */
|
|
ahc_outb(ahc, SCSISEQ, 0);
|
|
|
|
ahc_outb(ahc, SCB_CONTROL, 0);
|
|
|
|
ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE);
|
|
|
|
ahc_outb(ahc, CLRINT, CLRSCSIINT);
|
|
|
|
/* Shift the waiting Q forward. */
|
|
scbptr = ahc_inb(ahc, WAITING_SCBH);
|
|
ahc_outb(ahc, SCBPTR, scbptr);
|
|
nextscb = ahc_inb(ahc, SCB_NEXT);
|
|
ahc_outb(ahc, WAITING_SCBH, nextscb);
|
|
|
|
ahc_add_curscb_to_free_list(ahc);
|
|
|
|
restart_sequencer(ahc);
|
|
} else {
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("Unknown SCSIINT. Status = 0x%x\n", status);
|
|
ahc_outb(ahc, CLRSINT1, status);
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
ahc_outb(ahc, CLRINT, CLRSCSIINT);
|
|
scb = NULL;
|
|
}
|
|
if (scb != NULL) {
|
|
/* We want to process the command */
|
|
ahc_done(ahc, scb);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_handle_devreset(ahc, scb)
|
|
struct ahc_softc *ahc;
|
|
struct scb *scb;
|
|
{
|
|
u_int16_t targ_mask;
|
|
u_int8_t targ_scratch;
|
|
int target = scb->xs->sc_link->target;
|
|
int lun = scb->xs->sc_link->lun;
|
|
int scratch_offset = target;
|
|
char channel = (scb->hscb->tcl & SELBUSB) ? 'B': 'A';
|
|
int found;
|
|
|
|
if (channel == 'B')
|
|
scratch_offset += 8;
|
|
targ_mask = (0x01 << scratch_offset);
|
|
/*
|
|
* Go back to async/narrow transfers and
|
|
* renegotiate.
|
|
*/
|
|
ahc_index_busy_target(ahc, target, channel, /*unbusy*/TRUE);
|
|
ahc->needsdtr |= ahc->needsdtr_orig & targ_mask;
|
|
ahc->needwdtr |= ahc->needwdtr_orig & targ_mask;
|
|
ahc->sdtrpending &= ~targ_mask;
|
|
ahc->wdtrpending &= ~targ_mask;
|
|
targ_scratch = ahc_inb(ahc, TARG_SCRATCH + scratch_offset);
|
|
targ_scratch &= SXFR;
|
|
ahc_outb(ahc, TARG_SCRATCH + scratch_offset, targ_scratch);
|
|
sc_print_addr(scb->xs->sc_link);
|
|
found = ahc_reset_device(ahc, target, channel, lun,
|
|
SCB_LIST_NULL, XS_NOERROR);
|
|
printf("Bus Device Reset delivered. %d SCBs aborted\n", found);
|
|
ahc_run_done_queue(ahc);
|
|
}
|
|
|
|
/*
|
|
* We have a scb which has been processed by the
|
|
* adaptor, now we look to see how the operation
|
|
* went.
|
|
*/
|
|
static void
|
|
ahc_done(ahc, scb)
|
|
struct ahc_softc *ahc;
|
|
struct scb *scb;
|
|
{
|
|
struct scsi_xfer *xs = scb->xs;
|
|
|
|
SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_done\n"));
|
|
/*
|
|
* If the recovery SCB completes, we have to be
|
|
* out of our timeout.
|
|
*/
|
|
if (scb->flags & SCB_RECOVERY_SCB) {
|
|
ahc->in_timeout = FALSE;
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("no longer in timeout\n");
|
|
}
|
|
/*
|
|
* Put the results of the operation
|
|
* into the xfer and call whoever started it
|
|
*/
|
|
/* Don't override the error value. */
|
|
if (xs->error == XS_NOERROR
|
|
&& (scb->flags & SCB_SENSE) != 0)
|
|
xs->error = XS_SENSE;
|
|
|
|
#if defined(__FreeBSD__)
|
|
if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) {
|
|
/* All went correctly OR errors expected */
|
|
xs->error = XS_NOERROR;
|
|
}
|
|
#elif defined(__NetBSD__)
|
|
/*
|
|
* Since NetBSD doesn't have error ignoring operation mode
|
|
* (SCSI_ERR_OK in FreeBSD), we don't have to care this case.
|
|
*/
|
|
#endif
|
|
xs->flags |= ITSDONE;
|
|
#ifdef AHC_TAGENABLE
|
|
/*
|
|
* This functionality will be provided by the generic SCSI layer
|
|
* in FreeBSD 3.0.
|
|
*/
|
|
if (xs->cmd->opcode == INQUIRY && xs->error == XS_NOERROR) {
|
|
struct scsi_inquiry_data *inq_data;
|
|
u_int16_t mask = 0x01 << (xs->sc_link->target |
|
|
(scb->hscb->tcl & 0x08));
|
|
/*
|
|
* Sneak a look at the results of the SCSI Inquiry
|
|
* command and see if we can do Tagged queing. This
|
|
* should really be done by the higher level drivers.
|
|
*/
|
|
inq_data = (struct scsi_inquiry_data *)xs->data;
|
|
if ((inq_data->flags & SID_CmdQue)
|
|
&& !(ahc->tagenable & mask)) {
|
|
printf("%s: target %d Tagged Queuing Device\n",
|
|
ahc_name(ahc), xs->sc_link->target);
|
|
ahc->tagenable |= mask;
|
|
if (ahc->scb_data->maxhscbs >= 16
|
|
|| (ahc->flags & AHC_PAGESCBS)) {
|
|
/* Default to 8 tags */
|
|
xs->sc_link->opennings += 13;
|
|
} else {
|
|
/*
|
|
* Default to 4 tags on whimpy
|
|
* cards that don't have much SCB
|
|
* space and can't page. This prevents
|
|
* a single device from hogging all
|
|
* slots. We should really have a better
|
|
* way of providing fairness.
|
|
*/
|
|
xs->sc_link->opennings += 2;
|
|
}
|
|
}
|
|
}
|
|
#endif /* AHC_TAGENABLE */
|
|
if ((scb->flags & SCB_MSGOUT_WDTR|SCB_MSGOUT_SDTR) != 0) {
|
|
/*
|
|
* Turn off the pending flags for any DTR messages
|
|
* regardless of whether they completed successfully
|
|
* or not. This ensures that we don't have lingering
|
|
* state after we abort an SCB.
|
|
*/
|
|
u_int16_t mask;
|
|
|
|
mask = (0x01 << (xs->sc_link->target
|
|
| (IS_SCSIBUS_B(ahc, xs->sc_link) ? SELBUSB : 0)));
|
|
if (scb->flags & SCB_MSGOUT_WDTR)
|
|
ahc->wdtrpending &= ~mask;
|
|
if (scb->flags & SCB_MSGOUT_SDTR)
|
|
ahc->sdtrpending &= ~mask;
|
|
}
|
|
untimeout(ahc_timeout, (caddr_t)scb);
|
|
ahc_free_scb(ahc, scb);
|
|
/*
|
|
* If we're polling, we rely on the ITS_DONE flag in the xs structure
|
|
* to know that the command has completed. Unfortunately, scsi_done
|
|
* can cause the same xs to get requeued putting us in an infinite
|
|
* loop. So, we defer the scsi_done call until the poll routine exits
|
|
* its loop. I hate the way this works.
|
|
*/
|
|
if ((xs->flags & SCSI_NOMASK) == 0)
|
|
scsi_done(xs);
|
|
}
|
|
|
|
/*
|
|
* Start the board, ready for normal operation
|
|
*/
|
|
int
|
|
ahc_init(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
u_int8_t scsi_conf, sblkctl, sxfrctl1, i;
|
|
u_int16_t ultraenable = 0;
|
|
int max_targ = 15;
|
|
/*
|
|
* Assume we have a board at this stage and it has been reset.
|
|
*/
|
|
|
|
/* Handle the SCBPAGING option */
|
|
#ifndef AHC_SCBPAGING_ENABLE
|
|
ahc->flags &= ~AHC_PAGESCBS;
|
|
#endif
|
|
|
|
/* Determine channel configuration and who we are on the scsi bus. */
|
|
switch ((sblkctl = ahc_inb(ahc, SBLKCTL) & 0x0a)) {
|
|
case 0:
|
|
ahc->our_id = (ahc_inb(ahc, SCSICONF) & HSCSIID);
|
|
ahc->flags &= ~AHC_CHANNEL_B_PRIMARY;
|
|
if ((ahc->type & AHC_39X) != 0) {
|
|
char channel = 'A';
|
|
|
|
if ((ahc->flags & (AHC_CHNLB|AHC_CHNLC)) != 0)
|
|
channel = ahc->flags & AHC_CHNLB ? 'B' : 'C';
|
|
printf("Channel %c, SCSI Id=%d, ", channel,
|
|
ahc->our_id);
|
|
} else
|
|
printf("Single Channel, SCSI Id=%d, ", ahc->our_id);
|
|
ahc_outb(ahc, SEQ_FLAGS, ahc->flags & AHC_PAGESCBS);
|
|
break;
|
|
case 2:
|
|
ahc->our_id = (ahc_inb(ahc, SCSICONF + 1) & HWSCSIID);
|
|
ahc->flags &= ~AHC_CHANNEL_B_PRIMARY;
|
|
if ((ahc->type & AHC_39X) != 0) {
|
|
char channel = 'A';
|
|
|
|
if ((ahc->flags & (AHC_CHNLB|AHC_CHNLC)) != 0)
|
|
channel = ahc->flags & AHC_CHNLB ? 'B' : 'C';
|
|
printf("Wide Channel %c, SCSI Id=%d, ", channel,
|
|
ahc->our_id);
|
|
} else
|
|
printf("Wide Channel, SCSI Id=%d, ", ahc->our_id);
|
|
ahc->type |= AHC_WIDE;
|
|
ahc_outb(ahc, SEQ_FLAGS, WIDE_BUS | (ahc->flags & AHC_PAGESCBS));
|
|
break;
|
|
case 8:
|
|
ahc->our_id = (ahc_inb(ahc, SCSICONF) & HSCSIID);
|
|
ahc->our_id_b = (ahc_inb(ahc, SCSICONF + 1) & HSCSIID);
|
|
printf("Twin Channel, A SCSI Id=%d, B SCSI Id=%d, ",
|
|
ahc->our_id, ahc->our_id_b);
|
|
ahc->type |= AHC_TWIN;
|
|
ahc_outb(ahc, SEQ_FLAGS, TWIN_BUS | (ahc->flags & AHC_PAGESCBS));
|
|
break;
|
|
default:
|
|
printf(" Unsupported adapter type. Ignoring\n");
|
|
return(-1);
|
|
}
|
|
|
|
/* Determine the number of SCBs and initialize them */
|
|
|
|
if (ahc->scb_data->maxhscbs == 0) {
|
|
/* SCB 0 heads the free list */
|
|
ahc_outb(ahc, FREE_SCBH, 0);
|
|
for (i = 0; i < AHC_SCB_MAX; i++) {
|
|
ahc_outb(ahc, SCBPTR, i);
|
|
ahc_outb(ahc, SCB_CONTROL, i);
|
|
if(ahc_inb(ahc, SCB_CONTROL) != i)
|
|
break;
|
|
ahc_outb(ahc, SCBPTR, 0);
|
|
if(ahc_inb(ahc, SCB_CONTROL) != 0)
|
|
break;
|
|
ahc_outb(ahc, SCBPTR, i);
|
|
|
|
/* Clear the control byte. */
|
|
ahc_outb(ahc, SCB_CONTROL, 0);
|
|
|
|
/* Set the next pointer */
|
|
ahc_outb(ahc, SCB_NEXT, i+1);
|
|
|
|
/* Make the tag number invalid */
|
|
ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
|
|
|
|
/* No Busy non-tagged targets yet */
|
|
ahc_outb(ahc, SCB_BUSYTARGETS, SCB_LIST_NULL);
|
|
ahc_outb(ahc, SCB_BUSYTARGETS + 1, SCB_LIST_NULL);
|
|
ahc_outb(ahc, SCB_BUSYTARGETS + 2, SCB_LIST_NULL);
|
|
ahc_outb(ahc, SCB_BUSYTARGETS + 3, SCB_LIST_NULL);
|
|
}
|
|
|
|
/* Make that the last SCB terminates the free list */
|
|
ahc_outb(ahc, SCBPTR, i-1);
|
|
ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
|
|
|
|
/* Ensure we clear the 0 SCB's control byte. */
|
|
ahc_outb(ahc, SCBPTR, 0);
|
|
ahc_outb(ahc, SCB_CONTROL, 0);
|
|
|
|
ahc->scb_data->maxhscbs = i;
|
|
}
|
|
|
|
if ((ahc->scb_data->maxhscbs < AHC_SCB_MAX)
|
|
&& (ahc->flags & AHC_PAGESCBS)) {
|
|
u_int8_t max_scbid = 255;
|
|
|
|
/* Determine the number of valid bits in the FIFOs */
|
|
ahc_outb(ahc, QINFIFO, max_scbid);
|
|
max_scbid = ahc_inb(ahc, QINFIFO);
|
|
ahc->scb_data->maxscbs = MIN(AHC_SCB_MAX, max_scbid + 1);
|
|
printf("%d/%d SCBs\n", ahc->scb_data->maxhscbs,
|
|
ahc->scb_data->maxscbs);
|
|
} else {
|
|
ahc->scb_data->maxscbs = ahc->scb_data->maxhscbs;
|
|
ahc->flags &= ~AHC_PAGESCBS;
|
|
printf("%d SCBs\n", ahc->scb_data->maxhscbs);
|
|
}
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOWMISC) {
|
|
printf("%s: hardware scb %d bytes; kernel scb %d bytes; "
|
|
"ahc_dma %d bytes\n",
|
|
ahc_name(ahc),
|
|
sizeof(struct hardware_scb),
|
|
sizeof(struct scb),
|
|
sizeof(struct ahc_dma_seg));
|
|
}
|
|
#endif /* AHC_DEBUG */
|
|
|
|
/* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/
|
|
if (ahc->type & AHC_TWIN) {
|
|
/*
|
|
* The device is gated to channel B after a chip reset,
|
|
* so set those values first
|
|
*/
|
|
ahc_outb(ahc, SCSIID, ahc->our_id_b);
|
|
scsi_conf = ahc_inb(ahc, SCSICONF + 1);
|
|
sxfrctl1 = ahc_inb(ahc, SXFRCTL1);
|
|
ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
|
|
|(sxfrctl1 & STPWEN)
|
|
|ENSTIMER|ACTNEGEN);
|
|
ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
|
|
if (ahc->type & AHC_ULTRA)
|
|
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN|FAST20);
|
|
else
|
|
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
|
|
|
|
if (scsi_conf & RESET_SCSI) {
|
|
/* Reset the bus */
|
|
if (bootverbose)
|
|
printf("%s: Resetting Channel B\n",
|
|
ahc_name(ahc));
|
|
ahc_reset_current_bus(ahc);
|
|
}
|
|
|
|
/* Select Channel A */
|
|
ahc_outb(ahc, SBLKCTL, 0);
|
|
}
|
|
ahc_outb(ahc, SCSIID, ahc->our_id);
|
|
scsi_conf = ahc_inb(ahc, SCSICONF);
|
|
sxfrctl1 = ahc_inb(ahc, SXFRCTL1);
|
|
ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
|
|
|(sxfrctl1 & STPWEN)
|
|
|ENSTIMER|ACTNEGEN);
|
|
ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
|
|
if (ahc->type & AHC_ULTRA)
|
|
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN|FAST20);
|
|
else
|
|
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
|
|
|
|
if (scsi_conf & RESET_SCSI) {
|
|
/* Reset the bus */
|
|
if (bootverbose)
|
|
printf("%s: Resetting Channel A\n", ahc_name(ahc));
|
|
|
|
ahc_reset_current_bus(ahc);
|
|
}
|
|
|
|
/*
|
|
* Look at the information that board initialization or
|
|
* the board bios has left us. In the lower four bits of each
|
|
* target's scratch space any value other than 0 indicates
|
|
* that we should initiate synchronous transfers. If it's zero,
|
|
* the user or the BIOS has decided to disable synchronous
|
|
* negotiation to that target so we don't activate the needsdtr
|
|
* flag.
|
|
*/
|
|
ahc->needsdtr_orig = 0;
|
|
ahc->needwdtr_orig = 0;
|
|
|
|
/* Grab the disconnection disable table and invert it for our needs */
|
|
if (ahc->flags & AHC_USEDEFAULTS) {
|
|
printf("%s: Host Adapter Bios disabled. Using default SCSI "
|
|
"device parameters\n", ahc_name(ahc));
|
|
ahc->discenable = 0xff;
|
|
} else
|
|
ahc->discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8)
|
|
| ahc_inb(ahc, DISC_DSB));
|
|
|
|
if (!(ahc->type & (AHC_WIDE|AHC_TWIN)))
|
|
max_targ = 7;
|
|
|
|
for (i = 0; i <= max_targ; i++) {
|
|
u_int8_t target_settings;
|
|
if (ahc->flags & AHC_USEDEFAULTS) {
|
|
target_settings = 0; /* 10MHz/20MHz */
|
|
ahc->needsdtr_orig |= (0x01 << i);
|
|
ahc->needwdtr_orig |= (0x01 << i);
|
|
if (ahc->type & AHC_ULTRA)
|
|
ultraenable |= (0x01 << i);
|
|
} else {
|
|
/* Take the settings leftover in scratch RAM. */
|
|
target_settings = ahc_inb(ahc, TARG_SCRATCH + i);
|
|
|
|
if (target_settings & 0x0f) {
|
|
ahc->needsdtr_orig |= (0x01 << i);
|
|
/*Default to a asynchronous transfers(0 offset)*/
|
|
target_settings &= 0xf0;
|
|
}
|
|
if (target_settings & 0x80) {
|
|
ahc->needwdtr_orig |= (0x01 << i);
|
|
/*
|
|
* We'll set the Wide flag when we
|
|
* are successful with Wide negotiation.
|
|
* Turn it off for now so we aren't
|
|
* confused.
|
|
*/
|
|
target_settings &= 0x7f;
|
|
}
|
|
if (ahc->type & AHC_ULTRA) {
|
|
/*
|
|
* Enable Ultra for any target that
|
|
* has a valid ultra syncrate setting.
|
|
*/
|
|
u_int8_t rate = target_settings & 0x70;
|
|
if (rate == 0x00 || rate == 0x10 ||
|
|
rate == 0x20 || rate == 0x40) {
|
|
if (rate == 0x40) {
|
|
/* Treat 10MHz specially */
|
|
target_settings &= ~0x70;
|
|
} else
|
|
ultraenable |= (0x01 << i);
|
|
}
|
|
}
|
|
}
|
|
ahc_outb(ahc, TARG_SCRATCH+i,target_settings);
|
|
}
|
|
/*
|
|
* If we are not a WIDE device, forget WDTR. This
|
|
* makes the driver work on some cards that don't
|
|
* leave these fields cleared when the BIOS is not
|
|
* installed.
|
|
*/
|
|
if ((ahc->type & AHC_WIDE) == 0)
|
|
ahc->needwdtr_orig = 0;
|
|
ahc->needsdtr = ahc->needsdtr_orig;
|
|
ahc->needwdtr = ahc->needwdtr_orig;
|
|
ahc->sdtrpending = 0;
|
|
ahc->wdtrpending = 0;
|
|
ahc->tagenable = 0;
|
|
ahc->orderedtag = 0;
|
|
|
|
ahc_outb(ahc, ULTRA_ENB, ultraenable & 0xff);
|
|
ahc_outb(ahc, ULTRA_ENB + 1, (ultraenable >> 8) & 0xff);
|
|
|
|
#ifdef AHC_DEBUG
|
|
/* How did we do? */
|
|
if (ahc_debug & AHC_SHOWMISC)
|
|
printf("NEEDSDTR == 0x%x\nNEEDWDTR == 0x%x\n"
|
|
"DISCENABLE == 0x%x\n", ahc->needsdtr,
|
|
ahc->needwdtr, ahc->discenable);
|
|
#endif
|
|
/*
|
|
* Set the number of available hardware SCBs
|
|
*/
|
|
ahc_outb(ahc, SCBCOUNT, ahc->scb_data->maxhscbs);
|
|
|
|
/*
|
|
* 2's compliment of maximum tag value
|
|
*/
|
|
i = ahc->scb_data->maxscbs;
|
|
ahc_outb(ahc, COMP_SCBCOUNT, -i & 0xff);
|
|
|
|
/*
|
|
* Allocate enough "hardware scbs" to handle
|
|
* the maximum number of concurrent transactions
|
|
* we can have active. We have to use contigmalloc
|
|
* if this array crosses a page boundary since the
|
|
* sequencer depends on this array being physically
|
|
* contiguous.
|
|
*/
|
|
if (ahc->scb_data->hscbs == NULL) {
|
|
size_t array_size;
|
|
u_int32_t hscb_physaddr;
|
|
|
|
array_size = ahc->scb_data->maxscbs*sizeof(struct hardware_scb);
|
|
if (array_size > PAGE_SIZE) {
|
|
ahc->scb_data->hscbs = (struct hardware_scb *)
|
|
contigmalloc(array_size, M_DEVBUF,
|
|
M_NOWAIT, 0ul, 0xffffffff,
|
|
PAGE_SIZE, 0x10000);
|
|
} else {
|
|
ahc->scb_data->hscbs = (struct hardware_scb *)
|
|
malloc(array_size, M_DEVBUF, M_NOWAIT);
|
|
}
|
|
|
|
if (ahc->scb_data->hscbs == NULL) {
|
|
printf("%s: unable to allocate hardware SCB array. "
|
|
"Failing attach\n");
|
|
return (-1);
|
|
}
|
|
/* At least the control byte of each hscb needs to be zeroed */
|
|
bzero(ahc->scb_data->hscbs, array_size);
|
|
|
|
/* Tell the sequencer where it can find the hscb array. */
|
|
hscb_physaddr = vtophys(ahc->scb_data->hscbs);
|
|
ahc_outb(ahc, HSCB_ADDR, hscb_physaddr & 0xFF);
|
|
ahc_outb(ahc, HSCB_ADDR + 1, (hscb_physaddr >> 8)& 0xFF);
|
|
ahc_outb(ahc, HSCB_ADDR + 2, (hscb_physaddr >> 16)& 0xFF);
|
|
ahc_outb(ahc, HSCB_ADDR + 3, (hscb_physaddr >> 24)& 0xFF);
|
|
}
|
|
|
|
/*
|
|
* Q-Full-Count. Some cards have more Q space
|
|
* then SCBs.
|
|
*/
|
|
if (ahc->type & AHC_AIC7770) {
|
|
ahc->qfullcount = 4;
|
|
ahc->qcntmask = 0x07;
|
|
} else if (ahc->type & AHC_AIC7850) {
|
|
ahc->qfullcount = 8;
|
|
ahc->qcntmask = 0x0f;
|
|
} else if (ahc->scb_data->maxhscbs == 255) {
|
|
/* 7870/7880 with external SRAM */
|
|
ahc->qfullcount = 255;
|
|
ahc->qcntmask = 0xff;
|
|
} else {
|
|
/* 7870/7880 */
|
|
ahc->qfullcount = 16;
|
|
ahc->qcntmask = 0x1f;
|
|
}
|
|
|
|
/*
|
|
* QCount mask to deal with broken aic7850s that
|
|
* sporadically get garbage in the upper bits of
|
|
* their QCount registers.
|
|
*/
|
|
ahc_outb(ahc, QCNTMASK, ahc->qcntmask);
|
|
|
|
/* We don't have any waiting selections */
|
|
ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
|
|
|
|
/* Our disconnection list is empty too */
|
|
ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
|
|
|
|
/* Message out buffer starts empty */
|
|
ahc_outb(ahc, MSG_LEN, 0x00);
|
|
|
|
/*
|
|
* Load the Sequencer program and Enable the adapter
|
|
* in "fast" mode.
|
|
*/
|
|
if (bootverbose)
|
|
printf("%s: Downloading Sequencer Program...",
|
|
ahc_name(ahc));
|
|
|
|
ahc_loadseq(ahc);
|
|
|
|
if (bootverbose)
|
|
printf("Done\n");
|
|
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
|
|
/* Notify us when the system can handle timeouts */
|
|
timeout(ahc_first_timeout, NULL, 0);
|
|
|
|
/*
|
|
* Note that we are going and return (to probe)
|
|
*/
|
|
ahc->flags |= AHC_INIT;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ahcminphys(bp)
|
|
struct buf *bp;
|
|
{
|
|
/*
|
|
* Even though the card can transfer up to 16megs per command
|
|
* we are limited by the number of segments in the dma segment
|
|
* list that we can hold. The worst case is that all pages are
|
|
* discontinuous physically, hense the "page per segment" limit
|
|
* enforced here.
|
|
*/
|
|
if (bp->b_bcount > ((AHC_NSEG - 1) * PAGE_SIZE)) {
|
|
bp->b_bcount = ((AHC_NSEG - 1) * PAGE_SIZE);
|
|
}
|
|
#if defined(__NetBSD__)
|
|
minphys(bp);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* start a scsi operation given the command and
|
|
* the data address, target, and lun all of which
|
|
* are stored in the scsi_xfer struct
|
|
*/
|
|
static int32_t
|
|
ahc_scsi_cmd(xs)
|
|
struct scsi_xfer *xs;
|
|
{
|
|
struct scb *scb;
|
|
struct hardware_scb *hscb;
|
|
struct ahc_softc *ahc;
|
|
u_int16_t mask;
|
|
int flags;
|
|
int s;
|
|
|
|
ahc = (struct ahc_softc *)xs->sc_link->adapter_softc;
|
|
mask = (0x01 << (xs->sc_link->target
|
|
| (IS_SCSIBUS_B(ahc, xs->sc_link) ? SELBUSB : 0)));
|
|
SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_scsi_cmd\n"));
|
|
flags = xs->flags;
|
|
|
|
if (ahc->in_reset != 0) {
|
|
/*
|
|
* If we are still in a reset, send the transaction
|
|
* back indicating that it was aborted due to a
|
|
* reset.
|
|
*/
|
|
if ((IS_SCSIBUS_B(ahc, xs->sc_link)
|
|
&& (ahc->in_reset & CHANNEL_B_RESET) != 0)
|
|
|| (!IS_SCSIBUS_B(ahc, xs->sc_link)
|
|
&& (ahc->in_reset & CHANNEL_A_RESET) != 0)) {
|
|
/* Ick, but I don't want it to abort this */
|
|
xs->retries++;
|
|
xs->error = XS_BUSY;
|
|
return(COMPLETE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* get an scb to use. If the transfer
|
|
* is from a buf (possibly from interrupt time)
|
|
* then we can't allow it to sleep
|
|
*/
|
|
if ((scb = ahc_get_scb(ahc, flags)) == NULL) {
|
|
xs->error = XS_DRIVER_STUFFUP;
|
|
return (TRY_AGAIN_LATER);
|
|
}
|
|
hscb = scb->hscb;
|
|
SC_DEBUG(xs->sc_link, SDEV_DB3, ("start scb(%p)\n", scb));
|
|
scb->xs = xs;
|
|
|
|
/*
|
|
* Put all the arguments for the xfer in the scb
|
|
*/
|
|
if (ahc->discenable & mask) {
|
|
hscb->control |= DISCENB;
|
|
if (ahc->tagenable & mask)
|
|
hscb->control |= MSG_SIMPLE_Q_TAG;
|
|
if (ahc->orderedtag & mask) {
|
|
/* XXX this should be handled by the upper SCSI layer */
|
|
printf("Ordered Tag sent\n");
|
|
hscb->control |= MSG_ORDERED_Q_TAG;
|
|
ahc->orderedtag &= ~mask;
|
|
}
|
|
}
|
|
|
|
if (flags & SCSI_RESET) {
|
|
scb->flags |= SCB_DEVICE_RESET;
|
|
hscb->control |= MK_MESSAGE;
|
|
} else if ((ahc->needwdtr & mask) && !(ahc->wdtrpending & mask)) {
|
|
ahc->wdtrpending |= mask;
|
|
hscb->control |= MK_MESSAGE;
|
|
scb->flags |= SCB_MSGOUT_WDTR;
|
|
} else if((ahc->needsdtr & mask) && !(ahc->sdtrpending & mask)) {
|
|
ahc->sdtrpending |= mask;
|
|
hscb->control |= MK_MESSAGE;
|
|
scb->flags |= SCB_MSGOUT_SDTR;
|
|
}
|
|
|
|
#if 0
|
|
/* Set the trace flag if this is the target we want to trace */
|
|
if (ahc->unit == 2 && xs->sc_link->target == 3)
|
|
hscb->control |= TRACE_SCB;
|
|
#endif
|
|
|
|
hscb->tcl = ((xs->sc_link->target << 4) & 0xF0)
|
|
| (IS_SCSIBUS_B(ahc,xs->sc_link)? SELBUSB : 0)
|
|
| (xs->sc_link->lun & 0x07);
|
|
hscb->cmdlen = xs->cmdlen;
|
|
hscb->cmdpointer = vtophys(xs->cmd);
|
|
xs->resid = 0;
|
|
xs->status = 0;
|
|
|
|
/* Only use S/G if non-zero length */
|
|
if (xs->datalen) {
|
|
int seg;
|
|
u_int32_t datalen;
|
|
vm_offset_t vaddr;
|
|
u_int32_t paddr;
|
|
u_int32_t nextpaddr;
|
|
struct ahc_dma_seg *sg;
|
|
|
|
seg = 0;
|
|
datalen = xs->datalen;
|
|
vaddr = (vm_offset_t)xs->data;
|
|
paddr = vtophys(vaddr);
|
|
sg = scb->ahc_dma;
|
|
hscb->SG_list_pointer = vtophys(sg);
|
|
|
|
while ((datalen > 0) && (seg < AHC_NSEG)) {
|
|
/* put in the base address and length */
|
|
sg->addr = paddr;
|
|
sg->len = 0;
|
|
|
|
/* do it at least once */
|
|
nextpaddr = paddr;
|
|
|
|
while ((datalen > 0) && (paddr == nextpaddr)) {
|
|
u_int32_t size;
|
|
/*
|
|
* This page is contiguous (physically)
|
|
* with the the last, just extend the
|
|
* length
|
|
*/
|
|
/* how far to the end of the page */
|
|
nextpaddr = (paddr & (~PAGE_MASK)) + PAGE_SIZE;
|
|
|
|
/*
|
|
* Compute the maximum size
|
|
*/
|
|
size = nextpaddr - paddr;
|
|
if (size > datalen)
|
|
size = datalen;
|
|
|
|
sg->len += size;
|
|
vaddr += size;
|
|
datalen -= size;
|
|
if (datalen > 0)
|
|
paddr = vtophys(vaddr);
|
|
}
|
|
/*
|
|
* next page isn't contiguous, finish the seg
|
|
*/
|
|
seg++;
|
|
sg++;
|
|
}
|
|
hscb->SG_segment_count = seg;
|
|
scb->sg_count = hscb->SG_segment_count;
|
|
|
|
/* Copy the first SG into the data pointer area */
|
|
hscb->data = scb->ahc_dma->addr;
|
|
hscb->datalen = scb->ahc_dma->len | (SCB_LIST_NULL << 24);
|
|
if (datalen) {
|
|
/* there's still data, must have run out of segs! */
|
|
printf("%s: ahc_scsi_cmd: more than %d DMA segs\n",
|
|
ahc_name(ahc), AHC_NSEG);
|
|
xs->error = XS_DRIVER_STUFFUP;
|
|
ahc_free_scb(ahc, scb);
|
|
return (COMPLETE);
|
|
}
|
|
#ifdef AHC_BROKEN_CACHE
|
|
if (ahc_broken_cache)
|
|
INVALIDATE_CACHE();
|
|
#endif
|
|
} else {
|
|
/*
|
|
* No data xfer, use non S/G values
|
|
*/
|
|
hscb->SG_segment_count = 0;
|
|
scb->sg_count = hscb->SG_segment_count;
|
|
hscb->SG_list_pointer = 0;
|
|
hscb->data = 0;
|
|
hscb->datalen = (SCB_LIST_NULL << 24);
|
|
}
|
|
|
|
#ifdef AHC_DEBUG
|
|
if((ahc_debug & AHC_SHOWSCBS) && (xs->sc_link->target == DEBUGTARGET))
|
|
ahc_print_scb(scb);
|
|
#endif
|
|
s = splbio();
|
|
|
|
STAILQ_INSERT_TAIL(&ahc->waiting_scbs, scb, links);
|
|
|
|
scb->flags |= SCB_ACTIVE|SCB_WAITINGQ;
|
|
|
|
ahc_run_waiting_queue(ahc);
|
|
|
|
if ((flags & SCSI_NOMASK) == 0) {
|
|
timeout(ahc_timeout, (caddr_t)scb, (xs->timeout * hz) / 1000);
|
|
splx(s);
|
|
return (SUCCESSFULLY_QUEUED);
|
|
}
|
|
/*
|
|
* If we can't use interrupts, poll for completion
|
|
*/
|
|
SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_poll\n"));
|
|
do {
|
|
if (ahc_poll(ahc, xs->timeout)) {
|
|
if (!(xs->flags & SCSI_SILENT))
|
|
printf("cmd fail\n");
|
|
ahc_timeout(scb);
|
|
break;
|
|
}
|
|
} while ((xs->flags & ITSDONE) == 0); /* a non command complete intr */
|
|
scsi_done(xs);
|
|
splx(s);
|
|
return (COMPLETE);
|
|
}
|
|
|
|
/*
|
|
* Look for space in the QINFIFO and queue as many SCBs in the waiting
|
|
* queue as possible. Assumes that it is called at splbio().
|
|
*/
|
|
static void
|
|
ahc_run_waiting_queue(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
struct scb *scb;
|
|
|
|
/*
|
|
* On aic78X0 chips, we rely on Auto Access Pause (AAP)
|
|
* instead of doing an explicit pause/unpause.
|
|
*/
|
|
if ((ahc->type & AHC_AIC78X0) == 0)
|
|
pause_sequencer(ahc);
|
|
|
|
while ((scb = ahc->waiting_scbs.stqh_first) != NULL) {
|
|
|
|
if (ahc->curqincnt >= ahc->qfullcount) {
|
|
ahc->curqincnt = ahc_inb(ahc, QINCNT) & ahc->qcntmask;
|
|
if (ahc->curqincnt >= ahc->qfullcount)
|
|
/* Still no space */
|
|
break;
|
|
}
|
|
STAILQ_REMOVE_HEAD(&ahc->waiting_scbs, links);
|
|
scb->flags &= ~SCB_WAITINGQ;
|
|
ahc_outb(ahc, QINFIFO, scb->hscb->tag);
|
|
|
|
if ((ahc->flags & AHC_PAGESCBS) != 0)
|
|
/*
|
|
* We only care about this statistic when paging
|
|
* since it is impossible to overflow the qinfifo
|
|
* in the non-paging case.
|
|
*/
|
|
ahc->curqincnt++;
|
|
}
|
|
if ((ahc->type & AHC_AIC78X0) == 0)
|
|
unpause_sequencer(ahc, /*Unpause always*/FALSE);
|
|
}
|
|
|
|
/*
|
|
* An scb (and hence an scb entry on the board) is put onto the
|
|
* free list.
|
|
*/
|
|
static void
|
|
ahc_free_scb(ahc, scb)
|
|
struct ahc_softc *ahc;
|
|
struct scb *scb;
|
|
{
|
|
struct hardware_scb *hscb;
|
|
int opri;
|
|
|
|
hscb = scb->hscb;
|
|
|
|
opri = splbio();
|
|
|
|
/* Clean up for the next user */
|
|
scb->flags = SCB_FREE;
|
|
hscb->control = 0;
|
|
hscb->status = 0;
|
|
|
|
STAILQ_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links);
|
|
if (scb->links.stqe_next == NULL) {
|
|
/*
|
|
* If there were no SCBs available, wake anybody waiting
|
|
* for one to come free.
|
|
*/
|
|
wakeup((caddr_t)&ahc->scb_data->free_scbs);
|
|
}
|
|
#ifdef AHC_DEBUG
|
|
ahc->activescbs--;
|
|
#endif
|
|
splx(opri);
|
|
}
|
|
|
|
/*
|
|
* Get a free scb, either one already assigned to a hardware slot
|
|
* on the adapter or one that will require an SCB to be paged out before
|
|
* use. If there are none, see if we can allocate a new SCB. Otherwise
|
|
* either return an error or sleep.
|
|
*/
|
|
static struct scb *
|
|
ahc_get_scb(ahc, flags)
|
|
struct ahc_softc *ahc;
|
|
u_int32_t flags;
|
|
{
|
|
struct scb *scbp;
|
|
int opri;
|
|
|
|
opri = splbio();
|
|
/*
|
|
* If we can and have to, sleep waiting for one to come free
|
|
* but only if we can't allocate a new one.
|
|
*/
|
|
while (1) {
|
|
if ((scbp = ahc->scb_data->free_scbs.stqh_first)) {
|
|
STAILQ_REMOVE_HEAD(&ahc->scb_data->free_scbs, links);
|
|
} else if(ahc->scb_data->numscbs < ahc->scb_data->maxscbs) {
|
|
scbp = ahc_alloc_scb(ahc);
|
|
if (scbp == NULL)
|
|
printf("%s: Can't malloc SCB\n", ahc_name(ahc));
|
|
} else if ((flags & SCSI_NOSLEEP) == 0) {
|
|
tsleep((caddr_t)&ahc->scb_data->free_scbs, PRIBIO,
|
|
"ahcscb", 0);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (scbp) {
|
|
ahc->activescbs++;
|
|
if((ahc_debug & AHC_SHOWSCBCNT)
|
|
&& (ahc->activescbs == ahc->scb_data->maxhscbs))
|
|
printf("%s: Max SCBs active\n", ahc_name(ahc));
|
|
}
|
|
#endif
|
|
|
|
splx(opri);
|
|
|
|
return (scbp);
|
|
}
|
|
|
|
|
|
static struct scb *
|
|
ahc_alloc_scb(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
static struct ahc_dma_seg *next_sg_array = NULL;
|
|
static int sg_arrays_free = 0;
|
|
struct scb *newscb;
|
|
|
|
newscb = (struct scb *) malloc(sizeof(struct scb), M_DEVBUF, M_NOWAIT);
|
|
if (newscb != NULL) {
|
|
bzero(newscb, sizeof(struct scb));
|
|
if (next_sg_array == NULL) {
|
|
size_t alloc_size = sizeof(struct ahc_dma_seg)
|
|
* AHC_NSEG;
|
|
sg_arrays_free = PAGE_SIZE / alloc_size;
|
|
alloc_size *= sg_arrays_free;
|
|
if (alloc_size == 0)
|
|
panic("%s: SG list doesn't fit in a page",
|
|
ahc_name(ahc));
|
|
next_sg_array = (struct ahc_dma_seg *)
|
|
malloc(alloc_size, M_DEVBUF, M_NOWAIT);
|
|
}
|
|
if (next_sg_array != NULL) {
|
|
struct hardware_scb *hscb;
|
|
|
|
newscb->ahc_dma = next_sg_array;
|
|
sg_arrays_free--;
|
|
if (sg_arrays_free == 0)
|
|
next_sg_array = NULL;
|
|
else
|
|
next_sg_array = &next_sg_array[AHC_NSEG];
|
|
hscb = &ahc->scb_data->hscbs[ahc->scb_data->numscbs];
|
|
newscb->hscb = hscb;
|
|
hscb->control = 0;
|
|
hscb->status = 0;
|
|
hscb->tag = ahc->scb_data->numscbs;
|
|
hscb->residual_data_count[2] = 0;
|
|
hscb->residual_data_count[1] = 0;
|
|
hscb->residual_data_count[0] = 0;
|
|
hscb->residual_SG_segment_count = 0;
|
|
ahc->scb_data->numscbs++;
|
|
/*
|
|
* Place in the scbarray
|
|
* Never is removed.
|
|
*/
|
|
ahc->scb_data->scbarray[hscb->tag] = newscb;
|
|
} else {
|
|
free(newscb, M_DEVBUF);
|
|
newscb = NULL;
|
|
}
|
|
}
|
|
return newscb;
|
|
}
|
|
|
|
static void
|
|
ahc_loadseq(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
int options;
|
|
struct patch *cur_patch;
|
|
int i;
|
|
int downloaded;
|
|
|
|
options = 1; /* Code for all options */
|
|
downloaded = 0;
|
|
if ((ahc->type & AHC_ULTRA) != 0)
|
|
options |= ULTRA;
|
|
if ((ahc->type & AHC_TWIN) != 0)
|
|
options |= TWIN_CHANNEL;
|
|
if (ahc->scb_data->maxscbs > ahc->scb_data->maxhscbs)
|
|
options |= SCB_PAGING;
|
|
|
|
cur_patch = patches;
|
|
ahc_outb(ahc, SEQCTL, PERRORDIS|LOADRAM);
|
|
ahc_outb(ahc, SEQADDR0, 0);
|
|
ahc_outb(ahc, SEQADDR1, 0);
|
|
|
|
for(i = 0; i < sizeof(seqprog)/4; i++) {
|
|
cur_patch = ahc_next_patch(cur_patch, options, i);
|
|
|
|
if (cur_patch && cur_patch->begin <= i && cur_patch->end > i)
|
|
/* Skip this instruction for this configuration */
|
|
continue;
|
|
ahc_download_instr(ahc, options, i);
|
|
downloaded++;
|
|
}
|
|
|
|
ahc_outb(ahc, SEQCTL, FASTMODE);
|
|
ahc_outb(ahc, SEQADDR0, 0);
|
|
ahc_outb(ahc, SEQADDR1, 0);
|
|
if (bootverbose)
|
|
printf("%s: %d instructions downloaded\n", ahc_name(ahc),
|
|
downloaded);
|
|
}
|
|
|
|
static struct patch *
|
|
ahc_next_patch(cur_patch, options, instrptr)
|
|
struct patch *cur_patch;
|
|
int options;
|
|
int instrptr;
|
|
{
|
|
while(cur_patch != NULL) {
|
|
if (((cur_patch->options & options) != 0
|
|
&& cur_patch->negative == FALSE)
|
|
|| ((cur_patch->options & options) == 0
|
|
&& cur_patch->negative == TRUE)
|
|
|| (instrptr >= cur_patch->end)) {
|
|
/*
|
|
* Either we want to keep this section of code,
|
|
* or we have consumed this patch. Skip to the
|
|
* next patch.
|
|
*/
|
|
cur_patch++;
|
|
if (cur_patch->options == 0)
|
|
/* Out of patches */
|
|
cur_patch = NULL;
|
|
} else
|
|
/* Found an okay patch */
|
|
break;
|
|
}
|
|
return (cur_patch);
|
|
}
|
|
|
|
static void
|
|
ahc_download_instr(ahc, options, instrptr)
|
|
struct ahc_softc *ahc;
|
|
int options;
|
|
int instrptr;
|
|
{
|
|
u_int8_t opcode;
|
|
struct ins_format3 *instr;
|
|
|
|
instr = (struct ins_format3 *)&seqprog[instrptr * 4];
|
|
/* Pull the opcode */
|
|
opcode = instr->opcode_addr >> 1;
|
|
switch (opcode) {
|
|
case AIC_OP_JMP:
|
|
case AIC_OP_JC:
|
|
case AIC_OP_JNC:
|
|
case AIC_OP_CALL:
|
|
case AIC_OP_JNE:
|
|
case AIC_OP_JNZ:
|
|
case AIC_OP_JE:
|
|
case AIC_OP_JZ:
|
|
{
|
|
int address_offset;
|
|
struct ins_format3 new_instr;
|
|
u_int address;
|
|
struct patch *patch;
|
|
int i;
|
|
|
|
address_offset = 0;
|
|
new_instr = *instr; /* structure copy */
|
|
address = new_instr.address;
|
|
address |= (new_instr.opcode_addr & ADDR_HIGH_BIT) << 8;
|
|
for (i = 0; i < sizeof(patches)/sizeof(patches[0]); i++) {
|
|
patch = &patches[i];
|
|
if (((patch->options & options) == 0
|
|
&& patch->negative == FALSE)
|
|
|| ((patch->options & options) != 0
|
|
&& patch->negative == TRUE)) {
|
|
if (address >= patch->end)
|
|
address_offset +=
|
|
patch->end - patch->begin;
|
|
}
|
|
}
|
|
address -= address_offset;
|
|
new_instr.address = address & 0xFF;
|
|
new_instr.opcode_addr &= ~ADDR_HIGH_BIT;
|
|
new_instr.opcode_addr |= (address >> 8) & ADDR_HIGH_BIT;
|
|
ahc_outsb(ahc, SEQRAM, &new_instr.immediate, 4);
|
|
break;
|
|
}
|
|
case AIC_OP_OR:
|
|
case AIC_OP_AND:
|
|
case AIC_OP_XOR:
|
|
case AIC_OP_ADD:
|
|
case AIC_OP_ADC:
|
|
case AIC_OP_ROL:
|
|
ahc_outsb(ahc, SEQRAM, &instr->immediate, 4);
|
|
break;
|
|
default:
|
|
panic("Unknown opcode encountered in seq program");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function to poll for command completion when
|
|
* interrupts are disabled (crash dumps)
|
|
*/
|
|
static int
|
|
ahc_poll(ahc, wait)
|
|
struct ahc_softc *ahc;
|
|
int wait; /* in msec */
|
|
{
|
|
while (--wait) {
|
|
DELAY(1000);
|
|
if (ahc_inb(ahc, INTSTAT) & INT_PEND)
|
|
break;
|
|
} if (wait == 0) {
|
|
printf("%s: board is not responding\n", ahc_name(ahc));
|
|
return (EIO);
|
|
}
|
|
ahc_intr((void *)ahc);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Handler to register that the system is capable of
|
|
* delivering timeouts. We register this timeout in
|
|
* ahc_init and it should go off as soon as we're through
|
|
* the boot process.
|
|
*/
|
|
static void
|
|
ahc_first_timeout(arg)
|
|
void *arg;
|
|
{
|
|
timeouts_work = 1;
|
|
}
|
|
|
|
static void
|
|
ahc_timeout(arg)
|
|
void *arg;
|
|
{
|
|
struct scb *scb = (struct scb *)arg;
|
|
struct ahc_softc *ahc;
|
|
int s, found;
|
|
u_int8_t bus_state;
|
|
char channel;
|
|
|
|
ahc = (struct ahc_softc *)scb->xs->sc_link->adapter_softc;
|
|
|
|
s = splbio();
|
|
|
|
/*
|
|
* Ensure that the card doesn't do anything
|
|
* behind our back. Also make sure that we
|
|
* didn't "just" miss an interrupt that would
|
|
* affect this timeout.
|
|
*/
|
|
do {
|
|
ahc_intr(ahc);
|
|
pause_sequencer(ahc);
|
|
} while (ahc_inb(ahc, INTSTAT) & INT_PEND);
|
|
|
|
if (!(scb->flags & SCB_ACTIVE)) {
|
|
/* Previous timeout took care of me already */
|
|
printf("Timedout SCB handled by another timeout\n");
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
if (ahc->in_timeout) {
|
|
/*
|
|
* Some other SCB has started a recovery operation
|
|
* and is still working on cleaning things up.
|
|
*/
|
|
if ((scb->flags & SCB_RECOVERY_SCB) == 0) {
|
|
/*
|
|
* This is not the SCB that started this timeout
|
|
* processing. Give this scb another lifetime so
|
|
* that it can continue once we deal with the
|
|
* timeout.
|
|
*/
|
|
scb->flags |= SCB_TIMEDOUT;
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("SCB 0x%x timedout while recovery in progress\n",
|
|
scb->hscb->tag);
|
|
timeout(ahc_timeout, (caddr_t)scb,
|
|
(scb->xs->timeout * hz) / 1000);
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
splx(s);
|
|
return;
|
|
}
|
|
}
|
|
ahc->in_timeout = TRUE;
|
|
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("SCB 0x%x - timed out ", scb->hscb->tag);
|
|
/*
|
|
* Take a snapshot of the bus state and print out
|
|
* some information so we can track down driver bugs.
|
|
*/
|
|
bus_state = ahc_inb(ahc, LASTPHASE);
|
|
|
|
switch(bus_state)
|
|
{
|
|
case P_DATAOUT:
|
|
printf("in dataout phase");
|
|
break;
|
|
case P_DATAIN:
|
|
printf("in datain phase");
|
|
break;
|
|
case P_COMMAND:
|
|
printf("in command phase");
|
|
break;
|
|
case P_MESGOUT:
|
|
printf("in message out phase");
|
|
break;
|
|
case P_STATUS:
|
|
printf("in status phase");
|
|
break;
|
|
case P_MESGIN:
|
|
printf("in message in phase");
|
|
break;
|
|
case P_BUSFREE:
|
|
printf("while idle, LASTPHASE == 0x%x",
|
|
bus_state);
|
|
break;
|
|
default:
|
|
/*
|
|
* We aren't in a valid phase, so assume we're
|
|
* idle.
|
|
*/
|
|
printf("invalid phase, LASTPHASE == 0x%x",
|
|
bus_state);
|
|
break;
|
|
}
|
|
|
|
printf(", SCSISIGI == 0x%x\n", ahc_inb(ahc, SCSISIGI));
|
|
|
|
printf("SEQADDR == 0x%x\n", ahc_inb(ahc, SEQADDR0)
|
|
| (ahc_inb(ahc, SEQADDR1) << 8));
|
|
/* Decide our course of action */
|
|
|
|
channel = (scb->hscb->tcl & SELBUSB) ? 'B': 'A';
|
|
if (scb->flags & SCB_ABORT) {
|
|
/*
|
|
* Been down this road before.
|
|
* Do a full bus reset.
|
|
*/
|
|
bus_reset:
|
|
scb->flags |= SCB_RECOVERY_SCB;
|
|
found = ahc_reset_channel(ahc, channel, XS_TIMEOUT,
|
|
/*Initiate Reset*/TRUE);
|
|
printf("%s: Issued Channel %c Bus Reset. "
|
|
"%d SCBs aborted\n", ahc_name(ahc), channel, found);
|
|
} else if ((scb->hscb->control & TAG_ENB) != 0
|
|
&& (scb->flags & SCB_SENTORDEREDTAG) == 0) {
|
|
/*
|
|
* We could be starving this command
|
|
* try sending an ordered tag command
|
|
* to the target we come from.
|
|
*/
|
|
u_int16_t mask;
|
|
|
|
mask = (0x01 << (scb->xs->sc_link->target
|
|
| (IS_SCSIBUS_B(ahc, scb->xs->sc_link) ?
|
|
SELBUSB : 0)));
|
|
scb->flags |= SCB_SENTORDEREDTAG|SCB_RECOVERY_SCB;
|
|
ahc->orderedtag |= mask;
|
|
timeout(ahc_timeout, (caddr_t)scb, (5 * hz));
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
printf("Ordered Tag queued\n");
|
|
} else {
|
|
/*
|
|
* Send an Abort Message:
|
|
* The target that is holding up the bus may not
|
|
* be the same as the one that triggered this timeout
|
|
* (different commands have different timeout lengths).
|
|
* Our strategy here is to queue an abort message
|
|
* to the timed out target if it is disconnected.
|
|
* Otherwise, if we have an active target we stuff the
|
|
* message buffer with an abort message and assert ATN
|
|
* in the hopes that the target will let go of the bus
|
|
* and go to the mesgout phase. If this fails, we'll
|
|
* get another timeout 2 seconds later which will attempt
|
|
* a bus reset.
|
|
*/
|
|
u_int8_t saved_scbptr;
|
|
u_int8_t active_scb_index;
|
|
struct scb *active_scb;
|
|
|
|
saved_scbptr = ahc_inb(ahc, SCBPTR);
|
|
active_scb_index = ahc_inb(ahc, SCB_TAG);
|
|
active_scb = ahc->scb_data->scbarray[active_scb_index];
|
|
|
|
if (bus_state != P_BUSFREE) {
|
|
if (active_scb_index >= ahc->scb_data->numscbs) {
|
|
/* Go "immediatly" to the bus reset */
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("SCB %d: Yucky Immediate reset. "
|
|
"Flags = 0x%x\n", scb->hscb->tag,
|
|
scb->flags);
|
|
goto bus_reset;
|
|
}
|
|
/* Send the abort to the active SCB */
|
|
ahc_outb(ahc, MSG_LEN, 1);
|
|
ahc_outb(ahc, MSG_OUT,
|
|
(active_scb->hscb->control & TAG_ENB) == 0 ?
|
|
MSG_ABORT : MSG_ABORT_TAG);
|
|
ahc_outb(ahc, SCSISIGO, bus_state|ATNO);
|
|
sc_print_addr(active_scb->xs->sc_link);
|
|
printf("abort message in message buffer\n");
|
|
active_scb->flags |= SCB_ABORT|SCB_RECOVERY_SCB;
|
|
if (active_scb != scb) {
|
|
untimeout(ahc_timeout,
|
|
(caddr_t)active_scb);
|
|
/* Give scb a new lease on life */
|
|
timeout(ahc_timeout, (caddr_t)scb,
|
|
(scb->xs->timeout * hz) / 1000);
|
|
}
|
|
timeout(ahc_timeout, (caddr_t)active_scb,
|
|
(200 * hz) / 1000);
|
|
unpause_sequencer(ahc, /*unpause_always*/TRUE);
|
|
} else {
|
|
int disconnected;
|
|
u_int8_t hscb_index;
|
|
|
|
disconnected = FALSE;
|
|
hscb_index = ahc_find_scb(ahc, scb);
|
|
if (hscb_index == SCB_LIST_NULL) {
|
|
disconnected = TRUE;
|
|
} else {
|
|
ahc_outb(ahc, SCBPTR, hscb_index);
|
|
if (ahc_inb(ahc, SCB_CONTROL) & DISCONNECTED)
|
|
disconnected = TRUE;
|
|
}
|
|
|
|
if (disconnected) {
|
|
/* Simply set the ABORT_SCB control bit */
|
|
scb->hscb->control |= ABORT_SCB|MK_MESSAGE;
|
|
if ((ahc->flags & AHC_PAGESCBS) == 0)
|
|
scb->hscb->control &= ~DISCONNECTED;
|
|
scb->flags |= SCB_QUEUED_ABORT
|
|
| SCB_ABORT|SCB_RECOVERY_SCB;
|
|
if (hscb_index != SCB_LIST_NULL) {
|
|
u_int8_t scb_control;
|
|
|
|
scb_control = ahc_inb(ahc, SCB_CONTROL);
|
|
ahc_outb(ahc, SCB_CONTROL,
|
|
scb_control | MK_MESSAGE
|
|
| ABORT_SCB);
|
|
}
|
|
/*
|
|
* Actually re-queue this SCB in case we can
|
|
* select the device before it reconnects. If
|
|
* the transaction we want to abort is not
|
|
* tagged, unbusy it first so that we don't
|
|
* get held back from sending the command.
|
|
*/
|
|
if ((scb->hscb->control & TAG_ENB) == 0) {
|
|
int target;
|
|
int lun;
|
|
|
|
target = scb->xs->sc_link->target;
|
|
lun = scb->xs->sc_link->lun;
|
|
ahc_search_qinfifo(ahc, target,
|
|
channel,
|
|
lun,
|
|
SCB_LIST_NULL,
|
|
0, 0,
|
|
/*requeue*/TRUE);
|
|
}
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("Queueing an Abort SCB\n");
|
|
STAILQ_INSERT_HEAD(&ahc->waiting_scbs, scb,
|
|
links);
|
|
scb->flags |= SCB_WAITINGQ;
|
|
timeout(ahc_timeout, (caddr_t)scb,
|
|
(200 * hz) / 1000);
|
|
ahc_outb(ahc, SCBPTR, saved_scbptr);
|
|
/*
|
|
* ahc_run_waiting_queue may unpause us
|
|
* so do this last.
|
|
*/
|
|
ahc_run_waiting_queue(ahc);
|
|
/*
|
|
* If we are using AAP, ahc_run_waiting_queue
|
|
* will not unpause us, so ensure we are
|
|
* unpaused.
|
|
*/
|
|
unpause_sequencer(ahc, /*unpause_always*/FALSE);
|
|
} else {
|
|
/* Go "immediatly" to the bus reset */
|
|
sc_print_addr(scb->xs->sc_link);
|
|
printf("SCB %d: Immediate reset. "
|
|
"Flags = 0x%x\n", scb->hscb->tag,
|
|
scb->flags);
|
|
goto bus_reset;
|
|
}
|
|
}
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Look through the SCB array of the card and attempt to find the
|
|
* hardware SCB that corresponds to the passed in SCB. Return
|
|
* SCB_LIST_NULL if unsuccessful. This routine assumes that the
|
|
* card is already paused.
|
|
*/
|
|
static u_int8_t
|
|
ahc_find_scb(ahc, scb)
|
|
struct ahc_softc *ahc;
|
|
struct scb *scb;
|
|
{
|
|
u_int8_t saved_scbptr;
|
|
u_int8_t curindex;
|
|
|
|
saved_scbptr = ahc_inb(ahc, SCBPTR);
|
|
for (curindex = 0; curindex < ahc->scb_data->maxhscbs; curindex++) {
|
|
ahc_outb(ahc, SCBPTR, curindex);
|
|
if (ahc_inb(ahc, SCB_TAG) == scb->hscb->tag)
|
|
break;
|
|
}
|
|
ahc_outb(ahc, SCBPTR, saved_scbptr);
|
|
if (curindex >= ahc->scb_data->maxhscbs)
|
|
curindex = SCB_LIST_NULL;
|
|
|
|
return curindex;
|
|
}
|
|
|
|
static int
|
|
ahc_search_qinfifo(ahc, target, channel, lun, tag, flags, xs_error, requeue)
|
|
struct ahc_softc *ahc;
|
|
int target;
|
|
char channel;
|
|
int lun;
|
|
u_int8_t tag;
|
|
u_int32_t flags;
|
|
u_int32_t xs_error;
|
|
int requeue;
|
|
{
|
|
u_int8_t saved_queue[AHC_SCB_MAX];
|
|
int queued = ahc_inb(ahc, QINCNT) & ahc->qcntmask;
|
|
int i;
|
|
int found;
|
|
struct scb *scbp;
|
|
STAILQ_HEAD(, scb) removed_scbs;
|
|
|
|
found = 0;
|
|
STAILQ_INIT(&removed_scbs);
|
|
for (i = 0; i < (queued - found); i++) {
|
|
saved_queue[i] = ahc_inb(ahc, QINFIFO);
|
|
scbp = ahc->scb_data->scbarray[saved_queue[i]];
|
|
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
|
|
/*
|
|
* We found an scb that needs to be removed.
|
|
*/
|
|
if (requeue) {
|
|
STAILQ_INSERT_HEAD(&removed_scbs, scbp, links);
|
|
} else {
|
|
scbp->flags |= flags;
|
|
scbp->flags &= ~SCB_ACTIVE;
|
|
scbp->xs->error = xs_error;
|
|
}
|
|
i--;
|
|
found++;
|
|
}
|
|
}
|
|
/* Now put the saved scbs back. */
|
|
for (queued = 0; queued < i; queued++)
|
|
ahc_outb(ahc, QINFIFO, saved_queue[queued]);
|
|
|
|
if (requeue) {
|
|
while ((scbp = removed_scbs.stqh_first) != NULL) {
|
|
STAILQ_REMOVE_HEAD(&removed_scbs, links);
|
|
STAILQ_INSERT_HEAD(&ahc->waiting_scbs, scbp, links);
|
|
scbp->flags |= SCB_WAITINGQ;
|
|
}
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
|
|
/*
|
|
* The device at the given target/channel has been reset. Abort
|
|
* all active and queued scbs for that target/channel.
|
|
*/
|
|
static int
|
|
ahc_reset_device(ahc, target, channel, lun, tag, xs_error)
|
|
struct ahc_softc *ahc;
|
|
int target;
|
|
char channel;
|
|
int lun;
|
|
u_int8_t tag;
|
|
u_int32_t xs_error;
|
|
{
|
|
struct scb *scbp;
|
|
u_char active_scb;
|
|
int i = 0;
|
|
int found;
|
|
|
|
/* restore this when we're done */
|
|
active_scb = ahc_inb(ahc, SCBPTR);
|
|
|
|
/*
|
|
* Remove any entries from the Queue-In FIFO.
|
|
*/
|
|
found = ahc_search_qinfifo(ahc, target, channel, lun, tag,
|
|
SCB_ABORTED|SCB_QUEUED_FOR_DONE, xs_error,
|
|
/*requeue*/FALSE);
|
|
|
|
/*
|
|
* Search waiting for selection list.
|
|
*/
|
|
{
|
|
u_int8_t next, prev;
|
|
|
|
next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */
|
|
prev = SCB_LIST_NULL;
|
|
|
|
while (next != SCB_LIST_NULL) {
|
|
u_int8_t scb_index;
|
|
|
|
ahc_outb(ahc, SCBPTR, next);
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
if (scb_index >= ahc->scb_data->numscbs) {
|
|
panic("Waiting List inconsistency. "
|
|
"SCB index == %d, yet numscbs == %d.",
|
|
scb_index, ahc->scb_data->numscbs);
|
|
}
|
|
scbp = ahc->scb_data->scbarray[scb_index];
|
|
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
|
|
u_int8_t linked_next;
|
|
|
|
next = ahc_abort_wscb(ahc, scbp, next, prev,
|
|
xs_error);
|
|
linked_next = ahc_inb(ahc, SCB_LINKED_NEXT);
|
|
if (linked_next != SCB_LIST_NULL) {
|
|
struct scb *next_scb;
|
|
|
|
/*
|
|
* Re-queue the waiting SCB via the
|
|
* waiting list.
|
|
*/
|
|
next_scb =
|
|
ahc->scb_data->scbarray[linked_next];
|
|
if (!ahc_match_scb(next_scb, target,
|
|
channel, lun, tag)) {
|
|
STAILQ_INSERT_HEAD(&ahc->waiting_scbs,
|
|
next_scb,
|
|
links);
|
|
next_scb->flags |= SCB_WAITINGQ;
|
|
}
|
|
}
|
|
found++;
|
|
} else {
|
|
prev = next;
|
|
next = ahc_inb(ahc, SCB_NEXT);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Go through the entire SCB array now and look for
|
|
* commands for this target that are active. These
|
|
* are other (most likely tagged) commands that
|
|
* were disconnected when the reset occured.
|
|
*/
|
|
for (i = 0; i < ahc->scb_data->numscbs; i++) {
|
|
scbp = ahc->scb_data->scbarray[i];
|
|
if ((scbp->flags & SCB_ACTIVE)
|
|
&& ahc_match_scb(scbp, target, channel, lun, tag)) {
|
|
u_int8_t busy_scbid;
|
|
|
|
scbp->flags |= SCB_ABORTED|SCB_QUEUED_FOR_DONE;
|
|
scbp->flags &= ~SCB_ACTIVE;
|
|
scbp->xs->error = xs_error;
|
|
found++;
|
|
|
|
if ((scbp->flags & SCB_WAITINGQ) != 0) {
|
|
STAILQ_REMOVE(&ahc->waiting_scbs, scbp, scb,
|
|
links);
|
|
scbp->flags &= ~SCB_WAITINGQ;
|
|
}
|
|
/* Ensure the target is "free" */
|
|
busy_scbid = ahc_index_busy_target(ahc, target,
|
|
(scbp->hscb->tcl & SELBUSB) ?
|
|
'B' : 'A', /*unbusy*/FALSE);
|
|
if (busy_scbid != SCB_LIST_NULL) {
|
|
struct scb *busy_scb;
|
|
struct scb *next_scb;
|
|
u_int8_t next_scbid;
|
|
|
|
busy_scb = ahc->scb_data->scbarray[busy_scbid];
|
|
|
|
if (!ahc_match_scb(busy_scb, target,
|
|
channel, lun, tag))
|
|
continue;
|
|
|
|
ahc_index_busy_target(ahc, target,
|
|
(scbp->hscb->tcl & SELBUSB) ?
|
|
'B' : 'A', /*unbusy*/TRUE);
|
|
|
|
next_scbid = busy_scb->hscb->datalen >> 24;
|
|
|
|
if (next_scbid == SCB_LIST_NULL) {
|
|
busy_scbid = ahc_find_scb(ahc, busy_scb);
|
|
|
|
if (busy_scbid == SCB_LIST_NULL)
|
|
panic("Couldn't find busy SCB");
|
|
|
|
ahc_outb(ahc, SCBPTR, busy_scbid);
|
|
next_scbid = ahc_inb(ahc,
|
|
SCB_LINKED_NEXT);
|
|
|
|
if (next_scbid == SCB_LIST_NULL)
|
|
panic("Couldn't find next SCB");
|
|
}
|
|
|
|
next_scb = ahc->scb_data->scbarray[next_scbid];
|
|
if (!ahc_match_scb(next_scb, target,
|
|
channel, lun, tag)) {
|
|
STAILQ_INSERT_HEAD(&ahc->waiting_scbs,
|
|
next_scb, links);
|
|
next_scb->flags |= SCB_WAITINGQ;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Go through the disconnected list and remove any entries we
|
|
* have queued for completion, 0'ing their control byte too.
|
|
*/
|
|
{
|
|
u_int8_t next, prev;
|
|
|
|
next = ahc_inb(ahc, DISCONNECTED_SCBH);
|
|
prev = SCB_LIST_NULL;
|
|
|
|
while (next != SCB_LIST_NULL) {
|
|
u_int8_t scb_index;
|
|
|
|
ahc_outb(ahc, SCBPTR, next);
|
|
scb_index = ahc_inb(ahc, SCB_TAG);
|
|
if (scb_index >= ahc->scb_data->numscbs) {
|
|
panic("Disconnected List inconsistency. "
|
|
"SCB index == %d, yet numscbs == %d.",
|
|
scb_index, ahc->scb_data->numscbs);
|
|
}
|
|
scbp = ahc->scb_data->scbarray[scb_index];
|
|
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
|
|
next = ahc_rem_scb_from_disc_list(ahc, next);
|
|
} else {
|
|
prev = next;
|
|
next = ahc_inb(ahc, SCB_NEXT);
|
|
}
|
|
}
|
|
}
|
|
ahc_outb(ahc, SCBPTR, active_scb);
|
|
return found;
|
|
}
|
|
|
|
static u_int8_t
|
|
ahc_rem_scb_from_disc_list(ahc, scbptr)
|
|
struct ahc_softc *ahc;
|
|
u_int8_t scbptr;
|
|
{
|
|
u_int8_t next;
|
|
u_int8_t prev;
|
|
|
|
ahc_outb(ahc, SCBPTR, scbptr);
|
|
next = ahc_inb(ahc, SCB_NEXT);
|
|
prev = ahc_inb(ahc, SCB_PREV);
|
|
|
|
ahc_outb(ahc, SCB_CONTROL, 0);
|
|
|
|
ahc_add_curscb_to_free_list(ahc);
|
|
|
|
if (prev != SCB_LIST_NULL) {
|
|
ahc_outb(ahc, SCBPTR, prev);
|
|
ahc_outb(ahc, SCB_NEXT, next);
|
|
} else
|
|
ahc_outb(ahc, DISCONNECTED_SCBH, next);
|
|
|
|
if (next != SCB_LIST_NULL) {
|
|
ahc_outb(ahc, SCBPTR, next);
|
|
ahc_outb(ahc, SCB_PREV, prev);
|
|
}
|
|
return next;
|
|
}
|
|
|
|
static void
|
|
ahc_add_curscb_to_free_list(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
/* Invalidate the tag so that ahc_find_scb doesn't think it's active */
|
|
ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
|
|
|
|
ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH));
|
|
ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR));
|
|
}
|
|
|
|
/*
|
|
* Manipulate the waiting for selection list and return the
|
|
* scb that follows the one that we remove.
|
|
*/
|
|
static u_char
|
|
ahc_abort_wscb (ahc, scbp, scbpos, prev, xs_error)
|
|
struct ahc_softc *ahc;
|
|
struct scb *scbp;
|
|
u_int8_t scbpos;
|
|
u_int8_t prev;
|
|
u_int32_t xs_error;
|
|
{
|
|
u_int8_t curscb, next;
|
|
int target = ((scbp->hscb->tcl >> 4) & 0x0f);
|
|
char channel = (scbp->hscb->tcl & SELBUSB) ? 'B' : 'A';
|
|
/*
|
|
* Select the SCB we want to abort and
|
|
* pull the next pointer out of it.
|
|
*/
|
|
curscb = ahc_inb(ahc, SCBPTR);
|
|
ahc_outb(ahc, SCBPTR, scbpos);
|
|
next = ahc_inb(ahc, SCB_NEXT);
|
|
|
|
/* Clear the necessary fields */
|
|
ahc_outb(ahc, SCB_CONTROL, 0);
|
|
ahc_index_busy_target(ahc, target, channel, /*unbusy*/TRUE);
|
|
|
|
ahc_add_curscb_to_free_list(ahc);
|
|
|
|
/* update the waiting list */
|
|
if (prev == SCB_LIST_NULL)
|
|
/* First in the list */
|
|
ahc_outb(ahc, WAITING_SCBH, next);
|
|
else {
|
|
/*
|
|
* Select the scb that pointed to us
|
|
* and update its next pointer.
|
|
*/
|
|
ahc_outb(ahc, SCBPTR, prev);
|
|
ahc_outb(ahc, SCB_NEXT, next);
|
|
}
|
|
|
|
/*
|
|
* Point us back at the original scb position
|
|
* and inform the SCSI system that the command
|
|
* has been aborted.
|
|
*/
|
|
ahc_outb(ahc, SCBPTR, curscb);
|
|
scbp->flags |= SCB_ABORTED|SCB_QUEUED_FOR_DONE;
|
|
scbp->flags &= ~SCB_ACTIVE;
|
|
scbp->xs->error = xs_error;
|
|
return next;
|
|
}
|
|
|
|
static u_int8_t
|
|
ahc_index_busy_target(ahc, target, channel, unbusy)
|
|
struct ahc_softc *ahc;
|
|
int target;
|
|
char channel;
|
|
int unbusy;
|
|
{
|
|
u_int8_t active_scb;
|
|
u_int8_t info_scb;
|
|
u_int8_t busy_scbid;
|
|
u_int32_t scb_offset;
|
|
|
|
info_scb = target / 4;
|
|
if (channel == 'B')
|
|
info_scb += 2;
|
|
active_scb = ahc_inb(ahc, SCBPTR);
|
|
ahc_outb(ahc, SCBPTR, info_scb);
|
|
scb_offset = SCB_BUSYTARGETS + (target & 0x03);
|
|
busy_scbid = ahc_inb(ahc, scb_offset);
|
|
if (unbusy)
|
|
ahc_outb(ahc, scb_offset, SCB_LIST_NULL);
|
|
ahc_outb(ahc, SCBPTR, active_scb);
|
|
return busy_scbid;
|
|
}
|
|
|
|
static void
|
|
ahc_busy_target(ahc, target, channel, scbid)
|
|
struct ahc_softc *ahc;
|
|
int target;
|
|
char channel;
|
|
u_int8_t scbid;
|
|
{
|
|
u_int8_t active_scb;
|
|
u_int8_t info_scb;
|
|
u_int8_t busy_scbid;
|
|
u_int32_t scb_offset;
|
|
|
|
info_scb = target / 4;
|
|
if (channel == 'B')
|
|
info_scb += 2;
|
|
active_scb = ahc_inb(ahc, SCBPTR);
|
|
ahc_outb(ahc, SCBPTR, info_scb);
|
|
scb_offset = SCB_BUSYTARGETS + (target & 0x03);
|
|
ahc_outb(ahc, scb_offset, scbid);
|
|
ahc_outb(ahc, SCBPTR, active_scb);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
ahc_clear_intstat(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
/* Clear any interrupt conditions this may have caused */
|
|
ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
|
|
ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
|
|
|CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
|
|
CLRREQINIT);
|
|
ahc_outb(ahc, CLRINT, CLRSCSIINT);
|
|
}
|
|
|
|
static void
|
|
ahc_reset_current_bus(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
u_int8_t scsiseq;
|
|
u_int8_t sblkctl;
|
|
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
|
|
scsiseq = ahc_inb(ahc, SCSISEQ);
|
|
ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
|
|
if (timeouts_work != 0) {
|
|
struct ahc_busreset_args *args;
|
|
|
|
sblkctl = ahc_inb(ahc, SBLKCTL);
|
|
args = (sblkctl & SELBUSB) ? &ahc->busreset_args_b
|
|
: &ahc->busreset_args;
|
|
ahc->in_reset |= (args->bus == 'A' ? CHANNEL_A_RESET
|
|
: CHANNEL_B_RESET);
|
|
timeout(ahc_busreset_complete, args,
|
|
MAX((AHC_BUSRESET_DELAY * hz) / 1000000, 1));
|
|
} else {
|
|
DELAY(AHC_BUSRESET_DELAY);
|
|
/* Turn off the bus reset */
|
|
ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
|
|
|
|
ahc_clear_intstat(ahc);
|
|
|
|
/* Re-enable reset interrupts */
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
|
|
|
|
/* Wait a minimal bus settle delay */
|
|
DELAY(AHC_BUSSETTLE_DELAY);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ahc_busreset_complete(arg)
|
|
void *arg;
|
|
{
|
|
struct ahc_busreset_args *args;
|
|
struct ahc_softc *ahc;
|
|
int s;
|
|
u_int8_t scsiseq;
|
|
u_int8_t sblkctl;
|
|
|
|
args = (struct ahc_busreset_args *)arg;
|
|
ahc = (struct ahc_softc *)args->ahc;
|
|
|
|
s = splbio();
|
|
pause_sequencer(ahc);
|
|
|
|
/* Save the current block control state */
|
|
sblkctl = ahc_inb(ahc, SBLKCTL);
|
|
|
|
/* Switch to the right bus */
|
|
if (args->bus == 'A')
|
|
ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
|
|
else
|
|
ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
|
|
|
|
/* Turn off the bus reset */
|
|
printf("Clearing bus reset\n");
|
|
scsiseq = ahc_inb(ahc, SCSISEQ);
|
|
ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
|
|
|
|
ahc_clear_intstat(ahc);
|
|
|
|
/* Re-enable reset interrupts */
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
|
|
|
|
/*
|
|
* Set a 100ms timeout to clear our in_reset flag.
|
|
* It will be *at-least* that long before any targets
|
|
* respond to real commands on the bus.
|
|
*/
|
|
timeout(ahc_busreset_settle_complete, args,
|
|
(AHC_BUSSETTLE_DELAY * hz) / 1000000);
|
|
|
|
/* Restore the original channel */
|
|
ahc_outb(ahc, SBLKCTL, sblkctl);
|
|
unpause_sequencer(ahc, /*unpause_always*/FALSE);
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
ahc_busreset_settle_complete(arg)
|
|
void *arg;
|
|
{
|
|
struct ahc_busreset_args *args;
|
|
struct ahc_softc *ahc;
|
|
int s;
|
|
|
|
args = (struct ahc_busreset_args *)arg;
|
|
ahc = (struct ahc_softc *)args->ahc;
|
|
/* Clear the reset flag */
|
|
s = splbio();
|
|
printf("Clearing 'in-reset' flag\n");
|
|
ahc->in_reset &= (args->bus == 'A' ? ~CHANNEL_A_RESET
|
|
: ~CHANNEL_B_RESET);
|
|
splx(s);
|
|
}
|
|
|
|
static int
|
|
ahc_reset_channel(ahc, channel, xs_error, initiate_reset)
|
|
struct ahc_softc *ahc;
|
|
char channel;
|
|
u_int32_t xs_error;
|
|
int initiate_reset;
|
|
{
|
|
u_int32_t offset, offset_max;
|
|
int found;
|
|
int target;
|
|
u_int8_t sblkctl;
|
|
char cur_channel;
|
|
|
|
pause_sequencer(ahc);
|
|
/*
|
|
* Clean up all the state information for the
|
|
* pending transactions on this bus.
|
|
*/
|
|
found = ahc_reset_device(ahc, ALL_TARGETS, channel, ALL_LUNS,
|
|
SCB_LIST_NULL, xs_error);
|
|
if (channel == 'B') {
|
|
ahc->needsdtr |= (ahc->needsdtr_orig & 0xff00);
|
|
ahc->sdtrpending &= 0x00ff;
|
|
ahc->orderedtag &= 0x00ff;
|
|
offset = TARG_SCRATCH + 8;
|
|
offset_max = TARG_SCRATCH + 16;
|
|
} else if (ahc->type & AHC_WIDE){
|
|
ahc->needsdtr = ahc->needsdtr_orig;
|
|
ahc->needwdtr = ahc->needwdtr_orig;
|
|
ahc->orderedtag = 0;
|
|
ahc->sdtrpending = 0;
|
|
ahc->wdtrpending = 0;
|
|
offset = TARG_SCRATCH;
|
|
offset_max = TARG_SCRATCH + 16;
|
|
} else {
|
|
ahc->needsdtr |= (ahc->needsdtr_orig & 0x00ff);
|
|
ahc->sdtrpending &= 0xff00;
|
|
ahc->orderedtag &= 0xff00;
|
|
offset = TARG_SCRATCH;
|
|
offset_max = TARG_SCRATCH + 8;
|
|
}
|
|
|
|
for (; offset < offset_max; offset++) {
|
|
/*
|
|
* Revert to async/narrow transfers
|
|
* until we renegotiate.
|
|
*/
|
|
u_int8_t targ_scratch;
|
|
|
|
targ_scratch = ahc_inb(ahc, offset);
|
|
targ_scratch &= SXFR;
|
|
ahc_outb(ahc, offset, targ_scratch);
|
|
}
|
|
|
|
/*
|
|
* Reset the bus if we are initiating this reset and
|
|
* restart/unpause the sequencer
|
|
*/
|
|
sblkctl = ahc_inb(ahc, SBLKCTL);
|
|
cur_channel = (sblkctl & SELBUSB) ? 'B' : 'A';
|
|
if (cur_channel != channel) {
|
|
/* Case 1: Command for another bus is active
|
|
* Stealthily reset the other bus without
|
|
* upsetting the current bus.
|
|
*/
|
|
ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
|
|
if (initiate_reset)
|
|
ahc_reset_current_bus(ahc);
|
|
ahc_outb(ahc, SCSISEQ, 0);
|
|
ahc_clear_intstat(ahc);
|
|
ahc_outb(ahc, SBLKCTL, sblkctl);
|
|
unpause_sequencer(ahc, /*unpause_always*/FALSE);
|
|
} else {
|
|
/* Case 2: A command from this bus is active or we're idle */
|
|
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
|
|
if (initiate_reset)
|
|
ahc_reset_current_bus(ahc);
|
|
ahc_outb(ahc, SCSISEQ, 0);
|
|
ahc_clear_intstat(ahc);
|
|
restart_sequencer(ahc);
|
|
}
|
|
ahc_run_done_queue(ahc);
|
|
return found;
|
|
}
|
|
|
|
void
|
|
ahc_run_done_queue(ahc)
|
|
struct ahc_softc *ahc;
|
|
{
|
|
int i;
|
|
struct scb *scbp;
|
|
|
|
for (i = 0; i < ahc->scb_data->numscbs; i++) {
|
|
scbp = ahc->scb_data->scbarray[i];
|
|
if (scbp->flags & SCB_QUEUED_FOR_DONE)
|
|
ahc_done(ahc, scbp);
|
|
}
|
|
}
|
|
|
|
static int
|
|
ahc_match_scb (scb, target, channel, lun, tag)
|
|
struct scb *scb;
|
|
int target;
|
|
char channel;
|
|
int lun;
|
|
u_int8_t tag;
|
|
{
|
|
int targ = (scb->hscb->tcl >> 4) & 0x0f;
|
|
char chan = (scb->hscb->tcl & SELBUSB) ? 'B' : 'A';
|
|
int slun = scb->hscb->tcl & 0x07;
|
|
int match;
|
|
|
|
match = ((chan == channel) || (channel == ALL_CHANNELS));
|
|
if (match != 0)
|
|
match = ((targ == target) || (target == ALL_TARGETS));
|
|
if (match != 0)
|
|
match = ((lun == slun) || (lun == ALL_LUNS));
|
|
if (match != 0)
|
|
match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
|
|
|
|
return match;
|
|
}
|
|
|
|
static void
|
|
ahc_construct_sdtr(ahc, start_byte, period, offset)
|
|
struct ahc_softc *ahc;
|
|
int start_byte;
|
|
u_int8_t period;
|
|
u_int8_t offset;
|
|
{
|
|
ahc_outb(ahc, MSG_OUT + start_byte, MSG_EXTENDED);
|
|
ahc_outb(ahc, MSG_OUT + 1 + start_byte, MSG_EXT_SDTR_LEN);
|
|
ahc_outb(ahc, MSG_OUT + 2 + start_byte, MSG_EXT_SDTR);
|
|
ahc_outb(ahc, MSG_OUT + 3 + start_byte, period);
|
|
ahc_outb(ahc, MSG_OUT + 4 + start_byte, offset);
|
|
ahc_outb(ahc, MSG_LEN, start_byte + 5);
|
|
}
|
|
|
|
static void
|
|
ahc_construct_wdtr(ahc, start_byte, bus_width)
|
|
struct ahc_softc *ahc;
|
|
int start_byte;
|
|
u_int8_t bus_width;
|
|
{
|
|
ahc_outb(ahc, MSG_OUT + start_byte, MSG_EXTENDED);
|
|
ahc_outb(ahc, MSG_OUT + 1 + start_byte, MSG_EXT_WDTR_LEN);
|
|
ahc_outb(ahc, MSG_OUT + 2 + start_byte, MSG_EXT_WDTR);
|
|
ahc_outb(ahc, MSG_OUT + 3 + start_byte, bus_width);
|
|
ahc_outb(ahc, MSG_LEN, start_byte + 4);
|
|
}
|
|
|
|
static void
|
|
ahc_calc_residual(scb)
|
|
struct scb *scb;
|
|
{
|
|
struct scsi_xfer *xs;
|
|
struct hardware_scb *hscb;
|
|
int resid_sgs;
|
|
|
|
xs = scb->xs;
|
|
hscb = scb->hscb;
|
|
|
|
/*
|
|
* If the disconnected flag is still set, this is bogus
|
|
* residual information left over from a sequencer
|
|
* pagin/pageout, so ignore this case.
|
|
*/
|
|
if ((scb->hscb->control & DISCONNECTED) == 0
|
|
&& (scb->flags & SCB_SENSE) == 0) {
|
|
/*
|
|
* Remainder of the SG where the transfer
|
|
* stopped.
|
|
*/
|
|
xs->resid = (hscb->residual_data_count[2] <<16) |
|
|
(hscb->residual_data_count[1] <<8) |
|
|
(hscb->residual_data_count[0]);
|
|
|
|
/*
|
|
* Add up the contents of all residual
|
|
* SG segments that are after the SG where
|
|
* the transfer stopped.
|
|
*/
|
|
resid_sgs = scb->hscb->residual_SG_segment_count - 1;
|
|
while (resid_sgs > 0) {
|
|
int sg;
|
|
|
|
sg = scb->sg_count - resid_sgs;
|
|
xs->resid += scb->ahc_dma[sg].len;
|
|
resid_sgs--;
|
|
}
|
|
#if defined(__FreeBSD__)
|
|
xs->flags |= SCSI_RESID_VALID;
|
|
#elif defined(__NetBSD__)
|
|
/* XXX - Update to do this right */
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Clean out the residual information in this SCB for its
|
|
* next consumer.
|
|
*/
|
|
hscb->residual_data_count[2] = 0;
|
|
hscb->residual_data_count[1] = 0;
|
|
hscb->residual_data_count[0] = 0;
|
|
hscb->residual_SG_segment_count = 0;
|
|
|
|
#ifdef AHC_DEBUG
|
|
if (ahc_debug & AHC_SHOWMISC) {
|
|
sc_print_addr(xs->sc_link);
|
|
printf("Handled Residual of %ld bytes\n" ,xs->resid);
|
|
}
|
|
#endif
|
|
}
|