/* $NetBSD: kdb.c,v 1.7 1997/07/17 02:22:24 jtk Exp $ */ /* * Copyright (c) 1996 Ludd, University of Lule}, Sweden. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed at Ludd, University of * Lule}, Sweden and its contributors. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * KDB50 disk device driver */ /* * TODO * Implement node reset routine. * Nices hardware error handling. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "locators.h" #define b_forw b_hash.le_next /* * Software status, per controller. */ struct kdb_softc { struct device sc_dev; /* Autoconfig info */ struct ivec_dsp sc_ivec; /* Interrupt vector handler */ struct mscp_pack sc_kdb; /* Struct for kdb communication */ struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */ struct kdb_regs *sc_kr; /* KDB controller registers */ struct mscp *sc_mscp; /* Keep pointer to active mscp */ }; int kdbmatch __P((struct device *, void *, void *)); void kdbattach __P((struct device *, struct device *, void *)); void kdbreset __P((int)); void kdbintr __P((int)); void kdbctlrdone __P((struct device *, int)); int kdbprint __P((void *, const char *)); void kdbsaerror __P((struct device *, int)); int kdbgo __P((struct device *, struct buf *)); struct cfdriver kdb_cd = { NULL, "kdb", DV_DULL }; struct cfattach kdb_ca = { sizeof(struct kdb_softc), kdbmatch, kdbattach }; /* * More driver definitions, for generic MSCP code. */ struct mscp_ctlr kdb_mscp_ctlr = { kdbctlrdone, kdbgo, kdbsaerror, }; int kdbprint(aux, name) void *aux; const char *name; { if (name) printf("%s: mscpbus", name); return UNCONF; } /* * Poke at a supposed KDB to see if it is there. */ int kdbmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct cfdata *cf = match; struct bi_attach_args *ba = aux; if (ba->ba_node->biic.bi_dtype != BIDT_KDB50) return 0; if (cf->cf_loc[BICF_NODE] != BICF_NODE_DEFAULT && cf->cf_loc[BICF_NODE] != ba->ba_nodenr) return 0; return 1; } void kdbattach(parent, self, aux) struct device *parent, *self; void *aux; { struct kdb_softc *sc = (void *)self; struct bi_attach_args *ba = aux; struct mscp_attach_args ma; extern struct ivec_dsp idsptch; volatile int i = 10000; printf("\n"); bcopy(&idsptch, &sc->sc_ivec, sizeof(struct ivec_dsp)); scb->scb_nexvec[1][ba->ba_nodenr] = &sc->sc_ivec; sc->sc_ivec.hoppaddr = kdbintr; sc->sc_ivec.pushlarg = self->dv_unit; sc->sc_kr = (void *)ba->ba_node; bzero(&sc->sc_kdb, sizeof (struct mscp_pack)); ma.ma_mc = &kdb_mscp_ctlr; ma.ma_type = MSCPBUS_DISK|MSCPBUS_KDB; ma.ma_uuda = (struct mscp_pack *)kvtophys(&sc->sc_kdb); ma.ma_uda = &sc->sc_kdb; ma.ma_ip = &sc->sc_kr->kdb_ip; ma.ma_sa = &sc->sc_kr->kdb_sa; ma.ma_sw = &sc->sc_kr->kdb_sw; ma.ma_softc = &sc->sc_softc; ma.ma_ivec = (int)&scb->scb_nexvec[1][ba->ba_nodenr] - (int)scb; ma.ma_ctlrnr = ba->ba_nodenr; sc->sc_kr->kdb_bi.bi_csr |= BICSR_NRST; while (i--) /* Need delay??? */ ; sc->sc_kr->kdb_bi.bi_intrdes = ba->ba_intcpu; sc->sc_kr->kdb_bi.bi_bcicsr |= BCI_STOPEN | BCI_IDENTEN | BCI_UINTEN | BCI_INTEN; sc->sc_kr->kdb_bi.bi_uintrcsr = ma.ma_ivec; config_found(&sc->sc_dev, &ma, kdbprint); } int kdbgo(usc, bp) struct device *usc; struct buf *bp; { struct kdb_softc *sc = (void *)usc; struct mscp_softc *mi = sc->sc_softc; struct mscp *mp = (void *)bp->b_actb; struct pcb *pcb; pt_entry_t *pte; int pfnum, npf, o, i; unsigned info = 0; caddr_t addr; o = (int)bp->b_un.b_addr & PGOFSET; npf = btoc(bp->b_bcount + o) + 1; addr = bp->b_un.b_addr; /* * Get a pointer to the pte pointing out the first virtual address. * Use different ways in kernel and user space. */ if ((bp->b_flags & B_PHYS) == 0) { pte = kvtopte(addr); } else { pcb = bp->b_proc->p_vmspace->vm_map.pmap->pm_pcb; pte = uvtopte(addr, pcb); } /* * When we are doing DMA to user space, be sure that all pages * we want to transfer to is mapped. WHY DO WE NEED THIS??? * SHOULDN'T THEY ALWAYS BE MAPPED WHEN DOING THIS??? */ for (i = 0; i < (npf - 1); i++) { if ((pte + i)->pg_pfn == 0) { int rv; rv = vm_fault(&bp->b_proc->p_vmspace->vm_map, (unsigned)addr + i * NBPG, VM_PROT_READ|VM_PROT_WRITE, FALSE); if (rv) panic("KDB DMA to nonexistent page, %d", rv); } } /* * pte's for userspace isn't necessary positioned * in consecutive physical pages. We check if they * are, otherwise we need to copy the pte's to a * physically contigouos page area. * XXX some copying here may be unneccessary. Subject to fix. */ if (bp->b_flags & B_PHYS) { int i = kvtophys(pte); unsigned k; if (trunc_page(i) != trunc_page(kvtophys(pte) + npf * 4)) { info = (unsigned)malloc(2 * NBPG, M_DEVBUF, M_WAITOK); k = (info + PGOFSET) & ~PGOFSET; bcopy(pte, (void *)k, NBPG); i = kvtophys(k); } mp->mscp_seq.seq_mapbase = i; } else mp->mscp_seq.seq_mapbase = (unsigned)pte; mscp_dgo(mi, KDB_MAP | o, info, bp); return 1; } void kdbsaerror(usc, doreset) struct device *usc; int doreset; { struct kdb_softc *sc = (void *)usc; register int code = sc->sc_kr->kdb_sa; if ((code & MP_ERR) == 0) return; printf("%s: controller error, sa=0x%x\n", sc->sc_dev.dv_xname, code); /* What to do now??? */ } /* * Interrupt routine. Depending on the state of the controller, * continue initialisation, or acknowledge command and response * interrupts, and process responses. */ void kdbintr(ctlr) int ctlr; { struct kdb_softc *sc = kdb_cd.cd_devs[ctlr]; struct uba_softc *uh; struct mscp_pack *ud; if (sc->sc_kr->kdb_sa & MP_ERR) { /* ctlr fatal error */ kdbsaerror(&sc->sc_dev, 1); return; } mscp_intr(sc->sc_softc); } #ifdef notyet /* * The KDB50 has been reset. Reinitialise the controller * and requeue outstanding I/O. */ void kdbreset(ctlr) int ctlr; { register struct kdb_softc *sc; sc = kdb_cd.cd_devs[ctlr]; printf(" kdb%d", ctlr); /* reset queues and requeue pending transfers */ mscp_requeue(sc->sc_softc); /* * If it fails to initialise we will notice later and * try again (and again...). Do not call kdbstart() * here; it will be done after the controller finishes * initialisation. */ if (kdbinit(sc)) printf(" (hung)"); } #endif void kdbctlrdone(usc, info) struct device *usc; int info; { if (info) free((void *)info, NBPG * 2); }