629 lines
16 KiB
C
629 lines
16 KiB
C
/* $NetBSD: uha.c,v 1.29 2001/07/19 16:25:26 thorpej Exp $ */
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#undef UHADEBUG
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#ifdef DDB
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#define integrate
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#else
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#define integrate static inline
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#endif
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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
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* Simulation Facility, NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Ported for use with the UltraStor 14f by Gary Close (gclose@wvnvms.wvnet.edu)
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* Slight fixes to timeouts to run with the 34F
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* Thanks to Julian Elischer for advice and help with this port.
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*
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* Originally written by Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems for use under the MACH(2.5) operating system.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* commenced: Sun Sep 27 18:14:01 PDT 1992
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* slight mod to make work with 34F as well: Wed Jun 2 18:05:48 WST 1993
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/device.h>
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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 <sys/user.h>
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#include <uvm/uvm_extern.h>
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#include <machine/bus.h>
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#include <machine/intr.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 <dev/ic/uhareg.h>
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#include <dev/ic/uhavar.h>
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#ifndef DDB
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#define Debugger() panic("should call debugger here (uha.c)")
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#endif /* ! DDB */
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#define UHA_MAXXFER ((UHA_NSEG - 1) << PGSHIFT)
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integrate void uha_reset_mscp __P((struct uha_softc *, struct uha_mscp *));
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void uha_free_mscp __P((struct uha_softc *, struct uha_mscp *));
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integrate int uha_init_mscp __P((struct uha_softc *, struct uha_mscp *));
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struct uha_mscp *uha_get_mscp __P((struct uha_softc *));
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void uhaminphys __P((struct buf *));
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void uha_scsipi_request __P((struct scsipi_channel *,
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scsipi_adapter_req_t, void *));
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int uha_create_mscps __P((struct uha_softc *, struct uha_mscp *, int));
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#define UHA_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */
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/*
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* Attach all the sub-devices we can find
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*/
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void
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uha_attach(sc, upd)
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struct uha_softc *sc;
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struct uha_probe_data *upd;
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{
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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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bus_dma_segment_t seg;
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int i, error, rseg;
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TAILQ_INIT(&sc->sc_free_mscp);
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(sc->init)(sc);
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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_openings initialized below */
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/* adapt_max_periph initialized below */
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adapt->adapt_request = uha_scsipi_request;
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adapt->adapt_minphys = uhaminphys;
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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 = upd->sc_scsi_dev;
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#define MSCPSIZE (UHA_MSCP_MAX * sizeof(struct uha_mscp))
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/*
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* Allocate the MSCPs.
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*/
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if ((error = bus_dmamem_alloc(sc->sc_dmat, MSCPSIZE,
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PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
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printf("%s: unable to allocate mscps, error = %d\n",
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sc->sc_dev.dv_xname, error);
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return;
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}
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if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
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MSCPSIZE, (caddr_t *)&sc->sc_mscps,
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BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
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printf("%s: unable to map mscps, error = %d\n",
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sc->sc_dev.dv_xname, error);
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return;
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}
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/*
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* Create and load the DMA map used for the mscps.
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*/
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if ((error = bus_dmamap_create(sc->sc_dmat, MSCPSIZE,
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1, MSCPSIZE, 0, BUS_DMA_NOWAIT | sc->sc_dmaflags,
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&sc->sc_dmamap_mscp)) != 0) {
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printf("%s: unable to create mscp DMA map, error = %d\n",
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sc->sc_dev.dv_xname, error);
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return;
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}
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if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_mscp,
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sc->sc_mscps, MSCPSIZE, NULL, BUS_DMA_NOWAIT)) != 0) {
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printf("%s: unable to load mscp DMA map, error = %d\n",
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sc->sc_dev.dv_xname, error);
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return;
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}
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#undef MSCPSIZE
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/*
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* Initialize the mscps.
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*/
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i = uha_create_mscps(sc, sc->sc_mscps, UHA_MSCP_MAX);
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if (i == 0) {
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printf("%s: unable to create mscps\n",
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sc->sc_dev.dv_xname);
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return;
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} else if (i != UHA_MSCP_MAX) {
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printf("%s: WARNING: only %d of %d mscps created\n",
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sc->sc_dev.dv_xname, i, UHA_MSCP_MAX);
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}
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adapt->adapt_openings = i;
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adapt->adapt_max_periph = adapt->adapt_openings;
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/*
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* ask the adapter what subunits are present
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*/
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config_found(&sc->sc_dev, &sc->sc_channel, scsiprint);
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}
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integrate void
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uha_reset_mscp(sc, mscp)
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struct uha_softc *sc;
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struct uha_mscp *mscp;
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{
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mscp->flags = 0;
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}
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/*
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* A mscp (and hence a mbx-out) is put onto the free list.
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*/
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void
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uha_free_mscp(sc, mscp)
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struct uha_softc *sc;
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struct uha_mscp *mscp;
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{
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int s;
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s = splbio();
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uha_reset_mscp(sc, mscp);
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TAILQ_INSERT_HEAD(&sc->sc_free_mscp, mscp, chain);
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splx(s);
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}
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integrate int
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uha_init_mscp(sc, mscp)
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struct uha_softc *sc;
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struct uha_mscp *mscp;
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{
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bus_dma_tag_t dmat = sc->sc_dmat;
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int hashnum, error;
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/*
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* Create the DMA map for this MSCP.
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*/
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error = bus_dmamap_create(dmat, UHA_MAXXFER, UHA_NSEG, UHA_MAXXFER,
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0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW | sc->sc_dmaflags,
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&mscp->dmamap_xfer);
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if (error) {
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printf("%s: can't create mscp DMA map, error = %d\n",
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sc->sc_dev.dv_xname, error);
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return (error);
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}
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/*
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* put in the phystokv hash table
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* Never gets taken out.
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*/
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mscp->hashkey = sc->sc_dmamap_mscp->dm_segs[0].ds_addr +
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UHA_MSCP_OFF(mscp);
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hashnum = MSCP_HASH(mscp->hashkey);
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mscp->nexthash = sc->sc_mscphash[hashnum];
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sc->sc_mscphash[hashnum] = mscp;
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uha_reset_mscp(sc, mscp);
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return (0);
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}
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/*
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* Create a set of MSCPs and add them to the free list.
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*/
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int
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uha_create_mscps(sc, mscpstore, count)
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struct uha_softc *sc;
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struct uha_mscp *mscpstore;
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int count;
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{
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struct uha_mscp *mscp;
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int i, error;
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memset(mscpstore, 0, sizeof(struct uha_mscp) * count);
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for (i = 0; i < count; i++) {
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mscp = &mscpstore[i];
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if ((error = uha_init_mscp(sc, mscp)) != 0) {
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printf("%s: unable to initialize mscp, error = %d\n",
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sc->sc_dev.dv_xname, error);
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goto out;
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}
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TAILQ_INSERT_TAIL(&sc->sc_free_mscp, mscp, chain);
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}
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out:
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return (i);
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}
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/*
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* Get a free mscp
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*
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* If there are none, see if we can allocate a new one. If so, put it in the
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* hash table too otherwise either return an error or sleep.
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*/
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struct uha_mscp *
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uha_get_mscp(sc)
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struct uha_softc *sc;
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{
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struct uha_mscp *mscp;
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int s;
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s = splbio();
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mscp = TAILQ_FIRST(&sc->sc_free_mscp);
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if (mscp != NULL) {
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TAILQ_REMOVE(&sc->sc_free_mscp, mscp, chain);
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mscp->flags |= MSCP_ALLOC;
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}
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splx(s);
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return (mscp);
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}
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/*
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* given a physical address, find the mscp that it corresponds to.
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*/
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struct uha_mscp *
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uha_mscp_phys_kv(sc, mscp_phys)
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struct uha_softc *sc;
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u_long mscp_phys;
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{
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int hashnum = MSCP_HASH(mscp_phys);
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struct uha_mscp *mscp = sc->sc_mscphash[hashnum];
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while (mscp) {
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if (mscp->hashkey == mscp_phys)
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break;
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mscp = mscp->nexthash;
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}
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return (mscp);
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}
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/*
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* We have a mscp which has been processed by the adaptor, now we look to see
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* how the operation went.
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*/
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void
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uha_done(sc, mscp)
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struct uha_softc *sc;
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struct uha_mscp *mscp;
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{
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bus_dma_tag_t dmat = sc->sc_dmat;
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struct scsipi_sense_data *s1, *s2;
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struct scsipi_xfer *xs = mscp->xs;
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SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("uha_done\n"));
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bus_dmamap_sync(dmat, sc->sc_dmamap_mscp,
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UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp),
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BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
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/*
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* If we were a data transfer, unload the map that described
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* the data buffer.
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*/
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if (xs->datalen) {
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bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0,
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mscp->dmamap_xfer->dm_mapsize,
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(xs->xs_control & XS_CTL_DATA_IN) ? BUS_DMASYNC_POSTREAD :
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BUS_DMASYNC_POSTWRITE);
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bus_dmamap_unload(dmat, mscp->dmamap_xfer);
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}
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/*
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* Otherwise, put the results of the operation
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* into the xfer and call whoever started it
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*/
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if ((mscp->flags & MSCP_ALLOC) == 0) {
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printf("%s: exiting ccb not allocated!\n", sc->sc_dev.dv_xname);
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Debugger();
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return;
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}
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if (xs->error == XS_NOERROR) {
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if (mscp->host_stat != UHA_NO_ERR) {
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switch (mscp->host_stat) {
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case UHA_SBUS_TIMEOUT: /* No response */
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xs->error = XS_SELTIMEOUT;
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break;
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default: /* Other scsi protocol messes */
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printf("%s: host_stat %x\n",
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sc->sc_dev.dv_xname, mscp->host_stat);
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xs->error = XS_DRIVER_STUFFUP;
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}
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} else if (mscp->target_stat != SCSI_OK) {
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switch (mscp->target_stat) {
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case SCSI_CHECK:
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s1 = &mscp->mscp_sense;
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s2 = &xs->sense.scsi_sense;
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*s2 = *s1;
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xs->error = XS_SENSE;
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break;
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case SCSI_BUSY:
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xs->error = XS_BUSY;
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break;
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default:
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printf("%s: target_stat %x\n",
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sc->sc_dev.dv_xname, mscp->target_stat);
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xs->error = XS_DRIVER_STUFFUP;
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}
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} else
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xs->resid = 0;
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}
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uha_free_mscp(sc, mscp);
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scsipi_done(xs);
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}
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void
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uhaminphys(bp)
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struct buf *bp;
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{
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if (bp->b_bcount > UHA_MAXXFER)
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bp->b_bcount = UHA_MAXXFER;
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minphys(bp);
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}
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/*
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* start a scsi operation given the command and the data address. Also
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* needs the unit, target and lu.
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*/
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void
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uha_scsipi_request(chan, req, arg)
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struct scsipi_channel *chan;
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scsipi_adapter_req_t req;
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void *arg;
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{
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struct scsipi_xfer *xs;
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struct scsipi_periph *periph;
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struct uha_softc *sc = (void *)chan->chan_adapter->adapt_dev;
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bus_dma_tag_t dmat = sc->sc_dmat;
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struct uha_mscp *mscp;
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struct uha_dma_seg *sg;
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int error, seg, flags, s;
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switch (req) {
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case ADAPTER_REQ_RUN_XFER:
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xs = arg;
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periph = xs->xs_periph;
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flags = xs->xs_control;
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SC_DEBUG(periph, SCSIPI_DB2, ("uha_scsipi_request\n"));
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/* Get an MSCP to use. */
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mscp = uha_get_mscp(sc);
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#ifdef DIAGNOSTIC
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/*
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* This should never happen as we track the resources
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* in the mid-layer.
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*/
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if (mscp == NULL) {
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scsipi_printaddr(periph);
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printf("unable to allocate mscp\n");
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panic("uha_scsipi_request");
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}
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#endif
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mscp->xs = xs;
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mscp->timeout = xs->timeout;
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/*
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* Put all the arguments for the xfer in the mscp
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*/
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if (flags & XS_CTL_RESET) {
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mscp->opcode = UHA_SDR;
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mscp->ca = 0x01;
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} else {
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mscp->opcode = UHA_TSP;
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/* XXX Not for tapes. */
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mscp->ca = 0x01;
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memcpy(&mscp->scsi_cmd, xs->cmd, mscp->scsi_cmd_length);
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}
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mscp->xdir = UHA_SDET;
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mscp->dcn = 0x00;
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mscp->chan = 0x00;
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mscp->target = periph->periph_target;
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mscp->lun = periph->periph_lun;
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mscp->scsi_cmd_length = xs->cmdlen;
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mscp->sense_ptr = sc->sc_dmamap_mscp->dm_segs[0].ds_addr +
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UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp, mscp_sense);
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mscp->req_sense_length = sizeof(mscp->mscp_sense);
|
|
mscp->host_stat = 0x00;
|
|
mscp->target_stat = 0x00;
|
|
|
|
if (xs->datalen) {
|
|
sg = mscp->uha_dma;
|
|
seg = 0;
|
|
#ifdef TFS
|
|
if (flags & SCSI_DATA_UIO) {
|
|
error = bus_dmamap_load_uio(dmat,
|
|
mscp->dmamap_xfer, (struct uio *)xs->data,
|
|
((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT :
|
|
BUS_DMA_WAITOK) | BUS_DMA_STREAMING |
|
|
((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ :
|
|
BUS_DMA_WRITE));
|
|
} else
|
|
#endif /*TFS */
|
|
{
|
|
error = bus_dmamap_load(dmat,
|
|
mscp->dmamap_xfer, xs->data, xs->datalen,
|
|
NULL,
|
|
((flags & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT :
|
|
BUS_DMA_WAITOK) | BUS_DMA_STREAMING |
|
|
((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ :
|
|
BUS_DMA_WRITE));
|
|
}
|
|
|
|
switch (error) {
|
|
case 0:
|
|
break;
|
|
|
|
case ENOMEM:
|
|
case EAGAIN:
|
|
xs->error = XS_RESOURCE_SHORTAGE;
|
|
goto out_bad;
|
|
|
|
default:
|
|
xs->error = XS_DRIVER_STUFFUP;
|
|
printf("%s: error %d loading DMA map\n",
|
|
sc->sc_dev.dv_xname, error);
|
|
out_bad:
|
|
uha_free_mscp(sc, mscp);
|
|
scsipi_done(xs);
|
|
return;
|
|
}
|
|
|
|
bus_dmamap_sync(dmat, mscp->dmamap_xfer, 0,
|
|
mscp->dmamap_xfer->dm_mapsize,
|
|
(flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD :
|
|
BUS_DMASYNC_PREWRITE);
|
|
|
|
/*
|
|
* Load the hardware scatter/gather map with the
|
|
* contents of the DMA map.
|
|
*/
|
|
for (seg = 0;
|
|
seg < mscp->dmamap_xfer->dm_nsegs; seg++) {
|
|
mscp->uha_dma[seg].seg_addr =
|
|
mscp->dmamap_xfer->dm_segs[seg].ds_addr;
|
|
mscp->uha_dma[seg].seg_len =
|
|
mscp->dmamap_xfer->dm_segs[seg].ds_len;
|
|
}
|
|
|
|
mscp->data_addr =
|
|
sc->sc_dmamap_mscp->dm_segs[0].ds_addr +
|
|
UHA_MSCP_OFF(mscp) + offsetof(struct uha_mscp,
|
|
uha_dma);
|
|
mscp->data_length = xs->datalen;
|
|
mscp->sgth = 0x01;
|
|
mscp->sg_num = seg;
|
|
} else { /* No data xfer, use non S/G values */
|
|
mscp->data_addr = (physaddr)0;
|
|
mscp->data_length = 0;
|
|
mscp->sgth = 0x00;
|
|
mscp->sg_num = 0;
|
|
}
|
|
mscp->link_id = 0;
|
|
mscp->link_addr = (physaddr)0;
|
|
|
|
bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_mscp,
|
|
UHA_MSCP_OFF(mscp), sizeof(struct uha_mscp),
|
|
BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
|
|
|
|
s = splbio();
|
|
(sc->start_mbox)(sc, mscp);
|
|
splx(s);
|
|
|
|
if ((flags & XS_CTL_POLL) == 0)
|
|
return;
|
|
|
|
/*
|
|
* If we can't use interrupts, poll on completion
|
|
*/
|
|
if ((sc->poll)(sc, xs, mscp->timeout)) {
|
|
uha_timeout(mscp);
|
|
if ((sc->poll)(sc, xs, mscp->timeout))
|
|
uha_timeout(mscp);
|
|
}
|
|
return;
|
|
|
|
case ADAPTER_REQ_GROW_RESOURCES:
|
|
/* XXX Not supported. */
|
|
return;
|
|
|
|
case ADAPTER_REQ_SET_XFER_MODE:
|
|
/*
|
|
* We can't really do this (the UltraStor controllers
|
|
* have their own config).
|
|
*
|
|
* XXX How do we query the config?
|
|
*/
|
|
return;
|
|
}
|
|
}
|
|
void
|
|
uha_timeout(arg)
|
|
void *arg;
|
|
{
|
|
struct uha_mscp *mscp = arg;
|
|
struct scsipi_xfer *xs = mscp->xs;
|
|
struct scsipi_periph *periph = xs->xs_periph;
|
|
struct uha_softc *sc =
|
|
(void *)periph->periph_channel->chan_adapter->adapt_dev;
|
|
int s;
|
|
|
|
scsipi_printaddr(periph);
|
|
printf("timed out");
|
|
|
|
s = splbio();
|
|
|
|
if (mscp->flags & MSCP_ABORT) {
|
|
/* abort timed out */
|
|
printf(" AGAIN\n");
|
|
/* XXX Must reset! */
|
|
} else {
|
|
/* abort the operation that has timed out */
|
|
printf("\n");
|
|
mscp->xs->error = XS_TIMEOUT;
|
|
mscp->timeout = UHA_ABORT_TIMEOUT;
|
|
mscp->flags |= MSCP_ABORT;
|
|
(sc->start_mbox)(sc, mscp);
|
|
}
|
|
|
|
splx(s);
|
|
}
|