319 lines
8.5 KiB
C
319 lines
8.5 KiB
C
/* $NetBSD: uba.c,v 1.60 2002/06/01 23:51:02 lukem Exp $ */
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/*
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* Copyright (c) 1996 Jonathan Stone.
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* Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
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* Copyright (c) 1982, 1986 The Regents of the University of California.
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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 by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uba.c 7.10 (Berkeley) 12/16/90
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* @(#)autoconf.c 7.20 (Berkeley) 5/9/91
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.60 2002/06/01 23:51:02 lukem Exp $");
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/map.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 <sys/conf.h>
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#include <sys/dkstat.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <uvm/uvm_extern.h>
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#include <machine/bus.h>
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#include <machine/scb.h>
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#include <machine/cpu.h>
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#include <dev/qbus/ubareg.h>
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#include <dev/qbus/ubavar.h>
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#include "ioconf.h"
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static int ubasearch (struct device *, struct cfdata *, void *);
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static int ubaprint (void *, const char *);
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/*
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* If we failed to allocate uba resources, put us on a queue to wait
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* until there is available resources. Resources to compete about
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* are map registers and BDPs. This is normally only a problem on
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* Unibus systems, Qbus systems have more map registers than usable.
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*/
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void
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uba_enqueue(struct uba_unit *uu)
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{
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struct uba_softc *uh;
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int s;
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uh = (void *)((struct device *)(uu->uu_softc))->dv_parent;
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s = spluba();
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SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq);
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splx(s);
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}
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/*
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* When a routine that uses resources is finished, the next device
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* in queue for map registers etc is called. If it succeeds to get
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* resources, call next, and next, and next...
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* This routine must be called at spluba.
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*/
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void
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uba_done(struct uba_softc *uh)
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{
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struct uba_unit *uu;
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while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) {
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SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq);
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if ((*uu->uu_ready)(uu) == 0) {
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SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq);
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break;
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}
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}
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}
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/*
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* Each device that needs some handling if an ubareset occurs must
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* register for reset first through this routine.
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*/
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void
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uba_reset_establish(void (*reset)(struct device *), struct device *dev)
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{
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struct uba_softc *uh = (void *)dev->dv_parent;
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struct uba_reset *ur;
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ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT);
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if (ur == NULL)
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panic("uba_reset_establish");
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ur->ur_dev = dev;
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ur->ur_reset = reset;
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SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq);
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}
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/*
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* Allocate a bunch of map registers and map them to the given address.
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*/
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int
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uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags)
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{
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int waitok = (flags & UBA_CANTWAIT) == 0;
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int error;
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if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1,
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ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT),
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&ui->ui_dmam)))
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return error;
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if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr,
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ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) {
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bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
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return error;
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}
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ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr;
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return 0;
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}
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/*
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* Allocate DMA-able memory and map it on the unibus.
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*/
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int
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ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags)
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{
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int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
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int error;
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if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, NBPG, 0,
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&ui->ui_seg, 1, &ui->ui_rseg, waitok)))
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return error;
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if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg,
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ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) {
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bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
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return error;
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}
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if ((error = uballoc(uh, ui, flags))) {
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bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
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bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
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}
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return error;
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}
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void
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ubfree(struct uba_softc *uh, struct ubinfo *ui)
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{
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bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam);
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bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
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}
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void
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ubmemfree(struct uba_softc *uh, struct ubinfo *ui)
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{
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bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
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bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
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ubfree(uh, ui);
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}
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/*
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* Generate a reset on uba number uban. Then
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* call each device that asked to be called during attach,
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* giving it a chance to clean up so as to be able to continue.
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*/
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void
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ubareset(struct uba_softc *uh)
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{
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struct uba_reset *ur;
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int s;
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s = spluba();
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SIMPLEQ_INIT(&uh->uh_resq);
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printf("%s: reset", uh->uh_dev.dv_xname);
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(*uh->uh_ubainit)(uh);
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ur = SIMPLEQ_FIRST(&uh->uh_resetq);
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if (ur) do {
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printf(" %s", ur->ur_dev->dv_xname);
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(*ur->ur_reset)(ur->ur_dev);
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} while ((ur = SIMPLEQ_NEXT(ur, ur_resetq)));
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printf("\n");
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splx(s);
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}
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/*
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* The common attach routine:
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* Calls the scan routine to search for uba devices.
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*/
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void
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uba_attach(struct uba_softc *sc, paddr_t iopagephys)
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{
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/*
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* Set last free interrupt vector for devices with
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* programmable interrupt vectors. Use is to decrement
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* this number and use result as interrupt vector.
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*/
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sc->uh_lastiv = 0x200;
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SIMPLEQ_INIT(&sc->uh_resq);
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SIMPLEQ_INIT(&sc->uh_resetq);
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/*
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* Allocate place for unibus I/O space in virtual space.
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*/
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if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh))
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return;
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if (sc->uh_beforescan)
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(*sc->uh_beforescan)(sc);
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/*
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* Now start searching for devices.
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*/
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config_search(ubasearch,(struct device *)sc, NULL);
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if (sc->uh_afterscan)
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(*sc->uh_afterscan)(sc);
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}
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int
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ubasearch(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct uba_softc *sc = (struct uba_softc *)parent;
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struct uba_attach_args ua;
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int i, vec, br;
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ua.ua_ioh = ubdevreg(cf->cf_loc[0]) + sc->uh_ioh;
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ua.ua_iot = sc->uh_iot;
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ua.ua_dmat = sc->uh_dmat;
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if (badaddr((caddr_t)ua.ua_ioh, 2) ||
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(sc->uh_errchk ? (*sc->uh_errchk)(sc):0))
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goto forgetit;
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scb_vecref(0, 0); /* Clear vector ref */
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i = (*cf->cf_attach->ca_match) (parent, cf, &ua);
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if (sc->uh_errchk)
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if ((*sc->uh_errchk)(sc))
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goto forgetit;
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if (i == 0)
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goto forgetit;
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i = scb_vecref(&vec, &br);
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if (i == 0)
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goto fail;
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if (vec == 0)
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goto fail;
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ua.ua_br = br;
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ua.ua_cvec = vec;
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ua.ua_iaddr = cf->cf_loc[0];
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ua.ua_evcnt = NULL;
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config_attach(parent, cf, &ua, ubaprint);
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return 0;
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fail:
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printf("%s%d at %s csr %o %s\n",
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cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname,
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cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt"));
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forgetit:
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return 0;
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}
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/*
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* Print out some interesting info common to all unibus devices.
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*/
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int
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ubaprint(void *aux, const char *uba)
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{
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struct uba_attach_args *ua = aux;
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printf(" csr %o vec %o ipl %x", ua->ua_iaddr,
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ua->ua_cvec & 511, ua->ua_br);
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return UNCONF;
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}
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/*
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* Move to machdep eventually
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*/
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void
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uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg),
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void *iarg, struct evcnt *ev)
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{
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scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev);
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}
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