351 lines
9.4 KiB
C
351 lines
9.4 KiB
C
/* $NetBSD: kdb.c,v 1.27 2002/09/27 20:37:38 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
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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 at Ludd, University of
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* Lule}, Sweden and its contributors.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* KDB50 disk device driver
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*/
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/*
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* TODO
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* Implement node reset routine.
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* Nices hardware error handling.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kdb.c,v 1.27 2002/09/27 20:37:38 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/sched.h>
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#include <uvm/uvm_extern.h>
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#ifdef __vax__
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#include <machine/pte.h>
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#include <machine/pcb.h>
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#endif
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#include <machine/bus.h>
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#include <dev/bi/bireg.h>
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#include <dev/bi/bivar.h>
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#include <dev/bi/kdbreg.h>
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#include <dev/mscp/mscp.h>
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#include <dev/mscp/mscpreg.h>
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#include <dev/mscp/mscpvar.h>
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#include "locators.h"
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#define KDB_WL(adr, val) bus_space_write_4(sc->sc_iot, sc->sc_ioh, adr, val)
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#define KDB_RL(adr) bus_space_read_4(sc->sc_iot, sc->sc_ioh, adr)
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#define KDB_RS(adr) bus_space_read_2(sc->sc_iot, sc->sc_ioh, adr)
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#define b_forw b_hash.le_next
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/*
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* Software status, per controller.
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*/
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struct kdb_softc {
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struct device sc_dev; /* Autoconfig info */
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struct evcnt sc_intrcnt; /* Interrupt counting */
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caddr_t sc_kdb; /* Struct for kdb communication */
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struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */
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bus_dma_tag_t sc_dmat;
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bus_dmamap_t sc_cmap; /* Control structures */
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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int kdbmatch __P((struct device *, struct cfdata *, void *));
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void kdbattach __P((struct device *, struct device *, void *));
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void kdbreset __P((int));
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void kdbintr __P((void *));
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void kdbctlrdone __P((struct device *));
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int kdbprint __P((void *, const char *));
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void kdbsaerror __P((struct device *, int));
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void kdbgo __P((struct device *, struct mscp_xi *));
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const struct cfattach kdb_ca = {
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sizeof(struct kdb_softc), kdbmatch, kdbattach
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};
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/*
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* More driver definitions, for generic MSCP code.
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*/
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struct mscp_ctlr kdb_mscp_ctlr = {
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kdbctlrdone,
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kdbgo,
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kdbsaerror,
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};
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int
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kdbprint(aux, name)
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void *aux;
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const char *name;
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{
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if (name)
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printf("%s: mscpbus", name);
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return UNCONF;
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}
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/*
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* Poke at a supposed KDB to see if it is there.
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*/
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int
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kdbmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct bi_attach_args *ba = aux;
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if (bus_space_read_2(ba->ba_iot, ba->ba_ioh, BIREG_DTYPE) != BIDT_KDB50)
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return 0;
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if (cf->cf_loc[BICF_NODE] != BICF_NODE_DEFAULT &&
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cf->cf_loc[BICF_NODE] != ba->ba_nodenr)
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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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kdbattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct kdb_softc *sc = (void *)self;
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struct bi_attach_args *ba = aux;
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struct mscp_attach_args ma;
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volatile int i = 10000;
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int error, rseg;
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bus_dma_segment_t seg;
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printf("\n");
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bi_intr_establish(ba->ba_icookie, ba->ba_ivec,
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kdbintr, sc, &sc->sc_intrcnt);
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evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
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sc->sc_dev.dv_xname, "intr");
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sc->sc_iot = ba->ba_iot;
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sc->sc_ioh = ba->ba_ioh;
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sc->sc_dmat = ba->ba_dmat;
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/*
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* Map the communication area and command and
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* response packets into Unibus space.
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*/
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if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct mscp_pack),
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NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
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printf("Alloc ctrl area %d\n", 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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sizeof(struct mscp_pack), &sc->sc_kdb,
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BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
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printf("Map ctrl area %d\n", error);
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err: bus_dmamem_free(sc->sc_dmat, &seg, rseg);
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return;
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}
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if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct mscp_pack),
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1, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT, &sc->sc_cmap))) {
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printf("Create DMA map %d\n", error);
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err2: bus_dmamem_unmap(sc->sc_dmat, sc->sc_kdb,
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sizeof(struct mscp_pack));
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goto err;
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}
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if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmap,
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sc->sc_kdb, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT))) {
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printf("Load ctrl map %d\n", error);
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bus_dmamap_destroy(sc->sc_dmat, sc->sc_cmap);
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goto err2;
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}
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memset(sc->sc_kdb, 0, sizeof(struct mscp_pack));
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ma.ma_mc = &kdb_mscp_ctlr;
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ma.ma_type = MSCPBUS_DISK|MSCPBUS_KDB;
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ma.ma_uda = (struct mscp_pack *)sc->sc_kdb;
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ma.ma_softc = &sc->sc_softc;
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ma.ma_iot = sc->sc_iot;
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ma.ma_iph = sc->sc_ioh + KDB_IP;
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ma.ma_sah = sc->sc_ioh + KDB_SA;
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ma.ma_swh = sc->sc_ioh + KDB_SW;
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ma.ma_dmat = sc->sc_dmat;
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ma.ma_dmam = sc->sc_cmap;
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ma.ma_ivec = ba->ba_ivec;
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ma.ma_ctlrnr = ba->ba_nodenr;
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ma.ma_adapnr = ba->ba_busnr;
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KDB_WL(BIREG_VAXBICSR, KDB_RL(BIREG_VAXBICSR) | BICSR_NRST);
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while (i--) /* Need delay??? */
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;
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KDB_WL(BIREG_INTRDES, ba->ba_intcpu); /* Interrupt on CPU # */
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KDB_WL(BIREG_BCICSR, KDB_RL(BIREG_BCICSR) |
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BCI_STOPEN | BCI_IDENTEN | BCI_UINTEN | BCI_INTEN);
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KDB_WL(BIREG_UINTRCSR, ba->ba_ivec);
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config_found(&sc->sc_dev, &ma, kdbprint);
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}
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void
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kdbgo(usc, mxi)
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struct device *usc;
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struct mscp_xi *mxi;
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{
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struct kdb_softc *sc = (void *)usc;
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struct buf *bp = mxi->mxi_bp;
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struct mscp *mp = mxi->mxi_mp;
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u_int32_t addr = (u_int32_t)bp->b_data;
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u_int32_t mapaddr;
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int err;
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/*
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* The KDB50 wants to read VAX Page tables directly, therefore
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* the result from bus_dmamap_load() is uninteresting. (But it
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* should never fail!).
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*
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* On VAX, point to the corresponding page tables. (user/sys)
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* On other systems, do something else...
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*/
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err = bus_dmamap_load(sc->sc_dmat, mxi->mxi_dmam, bp->b_data,
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bp->b_bcount, (bp->b_flags & B_PHYS ? bp->b_proc : 0),
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BUS_DMA_NOWAIT);
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if (err) /* Shouldn't happen */
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panic("kdbgo: bus_dmamap_load: error %d", err);
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#ifdef __vax__
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/*
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* Get a pointer to the pte pointing out the first virtual address.
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* Use different ways in kernel and user space.
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*/
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if ((bp->b_flags & B_PHYS) == 0) {
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mapaddr = ((u_int32_t)kvtopte(addr)) & ~KERNBASE;
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} else {
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struct pcb *pcb;
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u_int32_t eaddr;
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/*
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* We check if the PTE's needed crosses a page boundary.
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* If they do; only transfer the amount of data that is
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* mapped by the first PTE page and led the system handle
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* the rest of the data.
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*/
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pcb = &bp->b_proc->p_addr->u_pcb;
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mapaddr = (u_int32_t)uvtopte(addr, pcb);
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eaddr = (u_int32_t)uvtopte(addr + (bp->b_bcount - 1), pcb);
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if (trunc_page(mapaddr) != trunc_page(eaddr)) {
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mp->mscp_seq.seq_bytecount =
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(((round_page(mapaddr) - mapaddr)/4) * 512);
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}
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mapaddr = kvtophys(mapaddr);
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}
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#else
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#error Must write code to handle KDB50 on non-vax.
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#endif
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mp->mscp_seq.seq_mapbase = mapaddr;
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mxi->mxi_dmam->dm_segs[0].ds_addr = (addr & 511) | KDB_MAP;
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mscp_dgo(sc->sc_softc, mxi);
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}
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void
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kdbsaerror(usc, doreset)
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struct device *usc;
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int doreset;
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{
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struct kdb_softc *sc = (void *)usc;
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if ((KDB_RS(KDB_SA) & MP_ERR) == 0)
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return;
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printf("%s: controller error, sa=0x%x\n", sc->sc_dev.dv_xname,
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KDB_RS(KDB_SA));
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/* What to do now??? */
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}
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/*
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* Interrupt routine. Depending on the state of the controller,
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* continue initialisation, or acknowledge command and response
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* interrupts, and process responses.
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*/
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void
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kdbintr(void *arg)
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{
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struct kdb_softc *sc = arg;
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if (KDB_RS(KDB_SA) & MP_ERR) { /* ctlr fatal error */
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kdbsaerror(&sc->sc_dev, 1);
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return;
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}
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KERNEL_LOCK(LK_CANRECURSE|LK_EXCLUSIVE);
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mscp_intr(sc->sc_softc);
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KERNEL_UNLOCK();
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}
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#ifdef notyet
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/*
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* The KDB50 has been reset. Reinitialise the controller
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* and requeue outstanding I/O.
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*/
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void
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kdbreset(ctlr)
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int ctlr;
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{
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struct kdb_softc *sc;
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sc = kdb_cd.cd_devs[ctlr];
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printf(" kdb%d", ctlr);
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/* reset queues and requeue pending transfers */
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mscp_requeue(sc->sc_softc);
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/*
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* If it fails to initialise we will notice later and
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* try again (and again...). Do not call kdbstart()
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* here; it will be done after the controller finishes
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* initialisation.
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*/
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if (kdbinit(sc))
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printf(" (hung)");
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}
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#endif
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void
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kdbctlrdone(usc)
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struct device *usc;
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{
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}
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