/* $OpenBSD: uba.c,v 1.13 2010/11/18 21:13:19 miod Exp $ */ /* $NetBSD: uba.c,v 1.57 2001/04/26 19:16:07 ragge Exp $ */ /* * Copyright (c) 1996 Jonathan Stone. * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. * Copyright (c) 1982, 1986 The Regents of the University of California. * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)uba.c 7.10 (Berkeley) 12/16/90 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int ubasearch (struct device *, struct cfdata *, void *); static int ubaprint (void *, const char *); struct cfdriver uba_cd = { NULL, "uba", DV_DULL }; /* * If we failed to allocate uba resources, put us on a queue to wait * until there is available resources. Resources to compete about * are map registers and BDPs. This is normally only a problem on * Unibus systems, Qbus systems have more map registers than usable. */ void uba_enqueue(struct uba_unit *uu) { struct uba_softc *uh; int s; uh = (void *)((struct device *)(uu->uu_softc))->dv_parent; s = splvm(); SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq); splx(s); } /* * When a routine that uses resources is finished, the next device * in queue for map registers etc is called. If it succeeds to get * resources, call next, and next, and next... * This routine must be called at splvm. */ void uba_done(struct uba_softc *uh) { struct uba_unit *uu; while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) { SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq); if ((*uu->uu_ready)(uu) == 0) { SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq); break; } } } /* * Each device that needs some handling if an ubareset occurs must * register for reset first through this routine. */ void uba_reset_establish(void (*reset)(struct device *), struct device *dev) { struct uba_softc *uh = (void *)dev->dv_parent; struct uba_reset *ur; ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT); if (ur == NULL) panic("uba_reset_establish"); ur->ur_dev = dev; ur->ur_reset = reset; SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq); } /* * Allocate a bunch of map registers and map them to the given address. */ int uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags) { int waitok = (flags & UBA_CANTWAIT) == 0; int error; if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1, ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT), &ui->ui_dmam))) return error; if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr, ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) { bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); return error; } ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr; return 0; } /* * Allocate DMA-able memory and map it on the unibus. */ int ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags) { int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK); int error; if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, NBPG, 0, &ui->ui_seg, 1, &ui->ui_rseg, waitok))) return error; if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg, ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) { bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); return error; } if ((error = uballoc(uh, ui, flags))) { bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); } return error; } void ubfree(struct uba_softc *uh, struct ubinfo *ui) { bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam); bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); } void ubmemfree(struct uba_softc *uh, struct ubinfo *ui) { bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); ubfree(uh, ui); } /* * Generate a reset on uba number uban. Then * call each device that asked to be called during attach, * giving it a chance to clean up so as to be able to continue. */ void ubareset(struct uba_softc *uh) { struct uba_reset *ur; int s; s = splvm(); SIMPLEQ_INIT(&uh->uh_resq); printf("%s: reset", uh->uh_dev.dv_xname); (*uh->uh_ubainit)(uh); ur = SIMPLEQ_FIRST(&uh->uh_resetq); if (ur) do { printf(" %s", ur->ur_dev->dv_xname); (*ur->ur_reset)(ur->ur_dev); } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq))); printf("\n"); splx(s); } /* * The common attach routine: * Calls the scan routine to search for uba devices. */ void uba_attach(struct uba_softc *sc, paddr_t iopagephys) { /* * Set last free interrupt vector for devices with * programmable interrupt vectors. Use is to decrement * this number and use result as interrupt vector. */ sc->uh_lastiv = 0x200; SIMPLEQ_INIT(&sc->uh_resq); SIMPLEQ_INIT(&sc->uh_resetq); /* * Allocate place for unibus I/O space in virtual space. */ if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh)) return; if (sc->uh_beforescan) (*sc->uh_beforescan)(sc); /* * Now start searching for devices. */ config_search((cfmatch_t)ubasearch,(struct device *)sc, NULL); if (sc->uh_afterscan) (*sc->uh_afterscan)(sc); } int ubasearch(struct device *parent, struct cfdata *cf, void *aux) { struct uba_softc *sc = (struct uba_softc *)parent; struct uba_attach_args ua; int i, vec, br; ua.ua_ioh = ubdevreg(cf->cf_loc[0]) + sc->uh_ioh; ua.ua_iot = sc->uh_iot; ua.ua_dmat = sc->uh_dmat; if (badaddr((caddr_t)ua.ua_ioh, 2) || (sc->uh_errchk ? (*sc->uh_errchk)(sc):0)) goto forgetit; scb_vecref(0, 0); /* Clear vector ref */ i = (*cf->cf_attach->ca_match) (parent, cf, &ua); if (sc->uh_errchk) if ((*sc->uh_errchk)(sc)) goto forgetit; if (i == 0) goto forgetit; i = scb_vecref(&vec, &br); if (i == 0) goto fail; if (vec == 0) goto fail; ua.ua_br = br; ua.ua_cvec = vec; ua.ua_iaddr = cf->cf_loc[0]; config_attach(parent, cf, &ua, ubaprint); return 0; fail: printf("%s%d at %s csr %o %s\n", cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); forgetit: return 0; } /* * Print out some interesting info common to all unibus devices. */ int ubaprint(void *aux, const char *uba) { struct uba_attach_args *ua = aux; printf(" csr %o vec %d ipl %x", ua->ua_iaddr, ua->ua_cvec & 511, ua->ua_br); return UNCONF; } /* * Move to machdep eventually */ void uba_intr_establish(icookie, vec, ifunc, iarg, ev) void *icookie; int vec; void (*ifunc)(void *iarg); void *iarg; struct evcount *ev; { scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev); }