937a7a3ed9
This is a completely rewritten scsipi_xfer execution engine, and the associated changes to HBA drivers. Overview of changes & features: - All xfers are queued in the mid-layer, rather than doing so in an ad-hoc fashion in individual adapter drivers. - Adapter/channel resource management in the mid-layer, avoids even trying to start running an xfer if the adapter/channel doesn't have the resources. - Better communication between the mid-layer and the adapters. - Asynchronous event notification mechanism from adapter to mid-layer and peripherals. - Better peripheral queue management: freeze/thaw, sorted requeueing during recovery, etc. - Clean separation of peripherals, adapters, and adapter channels (no more scsipi_link). - Kernel thread for each scsipi_channel makes error recovery much easier (no more dealing with interrupt context when recovering from an error). - Mid-layer support for tagged queueing: commands can have the tag type set explicitly, tag IDs are allocated in the mid-layer (thus eliminating the need to use buggy tag ID allocation schemes in many adapter drivers). - support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command will be requeued, or a REQUEST SENSE will be sent as appropriate. Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
209 lines
5.6 KiB
C
209 lines
5.6 KiB
C
/* $NetBSD: afsc.c,v 1.27 2001/04/25 17:53:06 bouyer Exp $ */
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/*
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* Copyright (c) 1994 Michael L. Hitch
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* Copyright (c) 1982, 1990 The Regents of the University of California.
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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, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dma.c
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#include <machine/cpu.h>
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#include <amiga/amiga/custom.h>
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#include <amiga/amiga/cc.h>
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#include <amiga/amiga/device.h>
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#include <amiga/amiga/isr.h>
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#include <amiga/dev/siopreg.h>
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#include <amiga/dev/siopvar.h>
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#include <amiga/dev/zbusvar.h>
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void afscattach __P((struct device *, struct device *, void *));
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int afscmatch __P((struct device *, struct cfdata *, void *));
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int afsc_dmaintr __P((void *));
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#ifdef DEBUG
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void afsc_dump __P((void));
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#endif
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#ifdef DEBUG
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#endif
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struct cfattach afsc_ca = {
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sizeof(struct siop_softc), afscmatch, afscattach
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};
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struct cfattach aftsc_ca = {
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sizeof(struct siop_softc), afscmatch, afscattach
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};
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/*
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* if we are a Commodore Amiga A4091 or possibly an A4000T
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*/
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int
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afscmatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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struct zbus_args *zap;
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siop_regmap_p rp;
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u_long temp, scratch;
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zap = auxp;
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if (zap->manid == 514 && zap->prodid == 84)
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return(1); /* It's an A4091 SCSI card */
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if (!is_a4000() || !matchname(auxp, "afsc"))
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return(0); /* Not on an A4000 or not A4000T SCSI */
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rp = ztwomap(0xdd0040);
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if (badaddr((caddr_t)&rp->siop_scratch) || badaddr((caddr_t)&rp->siop_temp)) {
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return(0);
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}
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scratch = rp->siop_scratch;
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temp = rp->siop_temp;
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rp->siop_scratch = 0xdeadbeef;
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rp->siop_temp = 0xaaaa5555;
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if (rp->siop_scratch != 0xdeadbeef || rp->siop_temp != 0xaaaa5555)
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return(0);
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rp->siop_scratch = scratch;
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rp->siop_temp = temp;
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if (rp->siop_scratch != scratch || rp->siop_temp != temp)
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return(0);
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return(1);
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}
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void
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afscattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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struct siop_softc *sc = (struct siop_softc *)dp;
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struct zbus_args *zap;
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siop_regmap_p rp;
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struct scsipi_adapter *adapt = &sc->sc_adapter;
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struct scsipi_channel *chan = &sc->sc_channel;
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printf("\n");
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zap = auxp;
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if (zap->manid == 514 && zap->prodid == 84)
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sc->sc_siopp = rp = (siop_regmap_p)((caddr_t)zap->va +
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0x00800000);
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else
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sc->sc_siopp = rp = ztwomap(0xdd0040);
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/*
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* CTEST7 = 80 [disable burst]
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*/
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sc->sc_clock_freq = 50; /* Clock = 50Mhz */
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sc->sc_ctest7 = SIOP_CTEST7_CDIS;
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sc->sc_dcntl = SIOP_DCNTL_EA;
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/*
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* Fill in the scsipi_adapter.
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*/
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memset(adapt, 0, sizeof(*adapt));
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adapt->adapt_dev = &sc->sc_dev;
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adapt->adapt_nchannels = 1;
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adapt->adapt_openings = 7;
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adapt->adapt_max_periph = 1;
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adapt->adapt_request = siop_scsipi_request;
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adapt->adapt_minphys = siop_minphys;
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/*
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* Fill in the scsipi_channel.
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*/
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memset(chan, 0, sizeof(*chan));
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chan->chan_adapter = adapt;
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chan->chan_bustype = &scsi_bustype;
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chan->chan_channel = 0;
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chan->chan_ntargets = 8;
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chan->chan_nluns = 8;
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chan->chan_id = 7;
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siopinitialize(sc);
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sc->sc_isr.isr_intr = afsc_dmaintr;
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sc->sc_isr.isr_arg = sc;
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sc->sc_isr.isr_ipl = 2;
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add_isr (&sc->sc_isr);
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/*
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* attach all scsi units on us
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*/
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config_found(dp, chan, scsiprint);
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}
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int
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afsc_dmaintr(arg)
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void *arg;
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{
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struct siop_softc *sc = arg;
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siop_regmap_p rp;
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u_char istat;
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if (sc->sc_flags & SIOP_INTSOFF)
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return (0); /* interrupts are not active */
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rp = sc->sc_siopp;
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istat = rp->siop_istat;
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if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
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return(0);
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/*
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* save interrupt status, DMA status, and SCSI status 0
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* (may need to deal with stacked interrupts?)
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*/
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sc->sc_sstat0 = rp->siop_sstat0;
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sc->sc_istat = istat;
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sc->sc_dstat = rp->siop_dstat;
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siopintr(sc);
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return(1);
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}
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#ifdef DEBUG
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void
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afsc_dump()
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{
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extern struct cfdriver afsc_cd;
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int i;
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for (i = 0; i < afsc_cd.cd_ndevs; ++i)
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if (afsc_cd.cd_devs[i])
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siop_dump(afsc_cd.cd_devs[i]);
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}
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#endif
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