/* $NetBSD: kdb.c,v 1.21 2000/06/05 00:09:17 matt 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 #ifdef __vax__ #include #include #endif #include #include #include #include #include #include #include #include "locators.h" #define KDB_WL(adr, val) bus_space_write_4(sc->sc_iot, sc->sc_ioh, adr, val) #define KDB_RL(adr) bus_space_read_4(sc->sc_iot, sc->sc_ioh, adr) #define KDB_RS(adr) bus_space_read_2(sc->sc_iot, sc->sc_ioh, adr) #define b_forw b_hash.le_next /* * Software status, per controller. */ struct kdb_softc { struct device sc_dev; /* Autoconfig info */ struct evcnt sc_intrcnt; /* Interrupt counting */ caddr_t sc_kdb; /* Struct for kdb communication */ struct mscp_softc *sc_softc; /* MSCP info (per mscpvar.h) */ bus_dma_tag_t sc_dmat; bus_dmamap_t sc_cmap; /* Control structures */ bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; }; int kdbmatch __P((struct device *, struct cfdata *, void *)); void kdbattach __P((struct device *, struct device *, void *)); void kdbreset __P((int)); void kdbintr __P((void *)); void kdbctlrdone __P((struct device *)); int kdbprint __P((void *, const char *)); void kdbsaerror __P((struct device *, int)); void kdbgo __P((struct device *, struct mscp_xi *)); 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, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct bi_attach_args *ba = aux; if (bus_space_read_2(ba->ba_iot, ba->ba_ioh, BIREG_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; volatile int i = 10000; int error, rseg; bus_dma_segment_t seg; printf("\n"); bi_intr_establish(ba->ba_icookie, ba->ba_ivec, kdbintr, sc, &sc->sc_intrcnt); evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, sc->sc_dev.dv_xname, "intr"); sc->sc_iot = ba->ba_iot; sc->sc_ioh = ba->ba_ioh; sc->sc_dmat = ba->ba_dmat; /* * Map the communication area and command and * response packets into Unibus space. */ if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct mscp_pack), NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { printf("Alloc ctrl area %d\n", error); return; } if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, sizeof(struct mscp_pack), &sc->sc_kdb, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { printf("Map ctrl area %d\n", error); err: bus_dmamem_free(sc->sc_dmat, &seg, rseg); return; } if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct mscp_pack), 1, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT, &sc->sc_cmap))) { printf("Create DMA map %d\n", error); err2: bus_dmamem_unmap(sc->sc_dmat, sc->sc_kdb, sizeof(struct mscp_pack)); goto err; } if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmap, sc->sc_kdb, sizeof(struct mscp_pack), 0, BUS_DMA_NOWAIT))) { printf("Load ctrl map %d\n", error); bus_dmamap_destroy(sc->sc_dmat, sc->sc_cmap); goto err2; } bzero(sc->sc_kdb, sizeof(struct mscp_pack)); ma.ma_mc = &kdb_mscp_ctlr; ma.ma_type = MSCPBUS_DISK|MSCPBUS_KDB; ma.ma_uda = (struct mscp_pack *)sc->sc_kdb; ma.ma_softc = &sc->sc_softc; ma.ma_iot = sc->sc_iot; ma.ma_iph = sc->sc_ioh + KDB_IP; ma.ma_sah = sc->sc_ioh + KDB_SA; ma.ma_swh = sc->sc_ioh + KDB_SW; ma.ma_dmat = sc->sc_dmat; ma.ma_dmam = sc->sc_cmap; ma.ma_ivec = ba->ba_ivec; ma.ma_ctlrnr = ba->ba_nodenr; ma.ma_adapnr = ba->ba_busnr; KDB_WL(BIREG_VAXBICSR, KDB_RL(BIREG_VAXBICSR) | BICSR_NRST); while (i--) /* Need delay??? */ ; KDB_WL(BIREG_INTRDES, ba->ba_intcpu); /* Interrupt on CPU # */ KDB_WL(BIREG_BCICSR, KDB_RL(BIREG_BCICSR) | BCI_STOPEN | BCI_IDENTEN | BCI_UINTEN | BCI_INTEN); KDB_WL(BIREG_UINTRCSR, ba->ba_ivec); config_found(&sc->sc_dev, &ma, kdbprint); } void kdbgo(usc, mxi) struct device *usc; struct mscp_xi *mxi; { struct kdb_softc *sc = (void *)usc; struct buf *bp = mxi->mxi_bp; struct mscp *mp = mxi->mxi_mp; u_int32_t addr = (u_int32_t)bp->b_data; u_int32_t mapaddr; int err; /* * The KDB50 wants to read VAX Page tables directly, therefore * the result from bus_dmamap_load() is uninteresting. (But it * should never fail!). * * On VAX, point to the corresponding page tables. (user/sys) * On other systems, do something else... */ err = bus_dmamap_load(sc->sc_dmat, mxi->mxi_dmam, bp->b_data, bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT); if (err) /* Shouldn't happen */ panic("kdbgo: bus_dmamap_load: error %d", err); #ifdef __vax__ /* * 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) { mapaddr = ((u_int32_t)kvtopte(addr)) & ~KERNBASE; } else { struct pcb *pcb; u_int32_t eaddr; /* * We check if the PTE's needed crosses a page boundary. * If they do; only transfer the amount of data that is * mapped by the first PTE page and led the system handle * the rest of the data. */ pcb = &bp->b_proc->p_addr->u_pcb; mapaddr = (u_int32_t)uvtopte(addr, pcb); eaddr = (u_int32_t)uvtopte(addr + (bp->b_bcount - 1), pcb); if (trunc_page(mapaddr) != trunc_page(eaddr)) { mp->mscp_seq.seq_bytecount = (((round_page(mapaddr) - mapaddr)/4) * 512); } mapaddr = kvtophys(mapaddr); } #else #error Must write code to handle KDB50 on non-vax. #endif mp->mscp_seq.seq_mapbase = mapaddr; mxi->mxi_dmam->dm_segs[0].ds_addr = (addr & 511) | KDB_MAP; mscp_dgo(sc->sc_softc, mxi); } void kdbsaerror(usc, doreset) struct device *usc; int doreset; { struct kdb_softc *sc = (void *)usc; if ((KDB_RS(KDB_SA) & MP_ERR) == 0) return; printf("%s: controller error, sa=0x%x\n", sc->sc_dev.dv_xname, KDB_RS(KDB_SA)); /* 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(void *arg) { struct kdb_softc *sc = arg; if (KDB_RS(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; { 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) struct device *usc; { }