518 lines
14 KiB
C
518 lines
14 KiB
C
/* $NetBSD: ebus.c,v 1.29 2001/10/22 08:09:46 mrg Exp $ */
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/*
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* Copyright (c) 1999, 2000, 2001 Matthew R. Green
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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. 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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include "opt_ddb.h"
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/*
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* UltraSPARC 5 and beyond ebus support.
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*
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* note that this driver is not complete:
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* - interrupt establish is written and appears to work
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* - bus map code is written and appears to work
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* - ebus2 dma code is completely unwritten, we just punt to
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* the iommu.
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*/
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#ifdef DEBUG
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#define EDB_PROM 0x01
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#define EDB_CHILD 0x02
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#define EDB_INTRMAP 0x04
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#define EDB_BUSMAP 0x08
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int ebus_debug = 0;
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#define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0)
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#else
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#define DPRINTF(l, s)
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#endif
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <sys/extent.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#define _SPARC_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/autoconf.h>
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#include <machine/openfirm.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#include <sparc64/dev/iommureg.h>
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#include <sparc64/dev/iommuvar.h>
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#include <sparc64/dev/psychoreg.h>
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#include <sparc64/dev/psychovar.h>
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#include <dev/ebus/ebusreg.h>
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#include <sparc64/dev/ebusvar.h>
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#include <sparc64/sparc64/cache.h>
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struct ebus_softc {
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struct device sc_dev;
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int sc_node;
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bus_space_tag_t sc_memtag; /* from pci */
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bus_space_tag_t sc_iotag; /* from pci */
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bus_space_tag_t sc_childbustag; /* pass to children */
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bus_dma_tag_t sc_dmatag;
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struct ebus_ranges *sc_range;
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struct ebus_interrupt_map *sc_intmap;
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struct ebus_interrupt_map_mask sc_intmapmask;
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int sc_nrange; /* counters */
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int sc_nintmap;
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};
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int ebus_match __P((struct device *, struct cfdata *, void *));
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void ebus_attach __P((struct device *, struct device *, void *));
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struct cfattach ebus_ca = {
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sizeof(struct ebus_softc), ebus_match, ebus_attach
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};
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bus_space_tag_t ebus_alloc_bus_tag __P((struct ebus_softc *, int));
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int ebus_setup_attach_args __P((struct ebus_softc *, int,
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struct ebus_attach_args *));
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void ebus_destroy_attach_args __P((struct ebus_attach_args *));
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int ebus_print __P((void *, const char *));
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void ebus_find_ino __P((struct ebus_softc *, struct ebus_attach_args *));
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int ebus_find_node __P((struct pci_attach_args *));
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/*
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* here are our bus space and bus dma routines.
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*/
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static paddr_t ebus_bus_mmap __P((bus_space_tag_t, bus_addr_t, off_t, int, int));
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static int _ebus_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t,
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bus_size_t, int, vaddr_t,
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bus_space_handle_t *));
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static void *ebus_intr_establish __P((bus_space_tag_t, int, int, int,
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int (*) __P((void *)), void *));
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int
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ebus_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct pci_attach_args *pa = aux;
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char name[10];
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int node;
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/* Only attach if there's a PROM node. */
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node = PCITAG_NODE(pa->pa_tag);
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if (node == -1) return (0);
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/* Match a real ebus */
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OF_getprop(node, "name", &name, sizeof(name));
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
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PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS &&
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strcmp(name, "ebus") == 0)
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return (1);
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/* Or a real ebus III */
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
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PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUSIII &&
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strcmp(name, "ebus") == 0)
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return (1);
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/* Or a PCI-ISA bridge XXX I hope this is on-board. */
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
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PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) {
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return (1);
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}
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return (0);
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}
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/*
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* attach an ebus and all it's children. this code is modeled
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* after the sbus code which does similar things.
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*/
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void
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ebus_attach(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 ebus_softc *sc = (struct ebus_softc *)self;
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struct pci_attach_args *pa = aux;
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struct ebus_attach_args eba;
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struct ebus_interrupt_map_mask *immp;
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int node, nmapmask, error;
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char devinfo[256];
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printf("\n");
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pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
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printf("%s: %s, revision 0x%02x\n", self->dv_xname, devinfo,
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PCI_REVISION(pa->pa_class));
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sc->sc_memtag = pa->pa_memt;
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sc->sc_iotag = pa->pa_iot;
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sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE);
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sc->sc_dmatag = pa->pa_dmat;
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node = PCITAG_NODE(pa->pa_tag);
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if (node == -1)
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panic("could not find ebus node");
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sc->sc_node = node;
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/*
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* fill in our softc with information from the prom
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*/
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sc->sc_intmap = NULL;
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sc->sc_range = NULL;
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error = PROM_getprop(node, "interrupt-map",
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sizeof(struct ebus_interrupt_map),
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&sc->sc_nintmap, (void **)&sc->sc_intmap);
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switch (error) {
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case 0:
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immp = &sc->sc_intmapmask;
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error = PROM_getprop(node, "interrupt-map-mask",
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sizeof(struct ebus_interrupt_map_mask), &nmapmask,
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(void **)&immp);
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if (error)
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panic("could not get ebus interrupt-map-mask");
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if (nmapmask != 1)
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panic("ebus interrupt-map-mask is broken");
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break;
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case ENOENT:
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break;
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default:
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panic("ebus interrupt-map: error %d", error);
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break;
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}
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error = PROM_getprop(node, "ranges", sizeof(struct ebus_ranges),
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&sc->sc_nrange, (void **)&sc->sc_range);
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if (error)
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panic("ebus ranges: error %d", error);
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/*
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* now attach all our children
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*/
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DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
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for (node = firstchild(node); node; node = nextsibling(node)) {
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char *name = PROM_getpropstring(node, "name");
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if (ebus_setup_attach_args(sc, node, &eba) != 0) {
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printf("ebus_attach: %s: incomplete\n", name);
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continue;
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} else {
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DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n",
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eba.ea_name));
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(void)config_found(self, &eba, ebus_print);
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}
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ebus_destroy_attach_args(&eba);
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}
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}
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int
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ebus_setup_attach_args(sc, node, ea)
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struct ebus_softc *sc;
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int node;
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struct ebus_attach_args *ea;
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{
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int n, rv;
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bzero(ea, sizeof(struct ebus_attach_args));
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rv = PROM_getprop(node, "name", 1, &n, (void **)&ea->ea_name);
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if (rv != 0)
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return (rv);
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ea->ea_name[n] = '\0';
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ea->ea_node = node;
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ea->ea_bustag = sc->sc_childbustag;
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ea->ea_dmatag = sc->sc_dmatag;
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rv = PROM_getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs,
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(void **)&ea->ea_regs);
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if (rv)
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return (rv);
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rv = PROM_getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs,
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(void **)&ea->ea_vaddrs);
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if (rv != ENOENT) {
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if (rv)
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return (rv);
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if (ea->ea_nregs != ea->ea_nvaddrs)
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printf("ebus loses: device %s: %d regs and %d addrs\n",
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ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs);
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} else
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ea->ea_nvaddrs = 0;
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if (PROM_getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs,
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(void **)&ea->ea_intrs))
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ea->ea_nintrs = 0;
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else
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ebus_find_ino(sc, ea);
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return (0);
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}
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void
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ebus_destroy_attach_args(ea)
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struct ebus_attach_args *ea;
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{
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if (ea->ea_name)
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free((void *)ea->ea_name, M_DEVBUF);
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if (ea->ea_regs)
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free((void *)ea->ea_regs, M_DEVBUF);
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if (ea->ea_intrs)
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free((void *)ea->ea_intrs, M_DEVBUF);
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if (ea->ea_vaddrs)
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free((void *)ea->ea_vaddrs, M_DEVBUF);
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}
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int
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ebus_print(aux, p)
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void *aux;
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const char *p;
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{
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struct ebus_attach_args *ea = aux;
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int i;
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if (p)
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printf("%s at %s", ea->ea_name, p);
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for (i = 0; i < ea->ea_nregs; i++)
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printf("%s %x-%x", i == 0 ? " addr" : ",",
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ea->ea_regs[i].lo,
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ea->ea_regs[i].lo + ea->ea_regs[i].size - 1);
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for (i = 0; i < ea->ea_nintrs; i++)
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printf(" ipl %d", ea->ea_intrs[i]);
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return (UNCONF);
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}
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/*
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* find the INO values for each interrupt and fill them in.
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*
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* for each "reg" property of this device, mask it's hi and lo
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* values with the "interrupt-map-mask"'s hi/lo values, and also
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* mask the interrupt number with the interrupt mask. search the
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* "interrupt-map" list for matching values of hi, lo and interrupt
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* to give the INO for this interrupt.
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*/
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void
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ebus_find_ino(sc, ea)
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struct ebus_softc *sc;
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struct ebus_attach_args *ea;
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{
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u_int32_t hi, lo, intr;
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int i, j, k;
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if (sc->sc_nintmap == 0) {
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for (i = 0; i < ea->ea_nintrs; i++) {
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OF_mapintr(ea->ea_node, &ea->ea_intrs[i],
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sizeof(ea->ea_intrs[0]),
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sizeof(ea->ea_intrs[0]));
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}
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return;
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}
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DPRINTF(EDB_INTRMAP,
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("ebus_find_ino: searching %d interrupts", ea->ea_nintrs));
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for (j = 0; j < ea->ea_nintrs; j++) {
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intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr;
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DPRINTF(EDB_INTRMAP,
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("; intr %x masked to %x", ea->ea_intrs[j], intr));
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for (i = 0; i < ea->ea_nregs; i++) {
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hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi;
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lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo;
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DPRINTF(EDB_INTRMAP,
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("; reg hi.lo %08x.%08x masked to %08x.%08x",
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ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo));
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for (k = 0; k < sc->sc_nintmap; k++) {
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DPRINTF(EDB_INTRMAP,
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("; checking hi.lo %08x.%08x intr %x",
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sc->sc_intmap[k].hi, sc->sc_intmap[k].lo,
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sc->sc_intmap[k].intr));
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if (hi == sc->sc_intmap[k].hi &&
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lo == sc->sc_intmap[k].lo &&
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intr == sc->sc_intmap[k].intr) {
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ea->ea_intrs[j] =
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sc->sc_intmap[k].cintr;
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DPRINTF(EDB_INTRMAP,
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("; FOUND IT! changing to %d\n",
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sc->sc_intmap[k].cintr));
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goto next_intr;
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}
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}
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}
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next_intr:;
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}
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}
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/*
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* bus space support. <sparc64/dev/psychoreg.h> has a discussion
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* about PCI physical addresses, which also applies to ebus.
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*/
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bus_space_tag_t
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ebus_alloc_bus_tag(sc, type)
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struct ebus_softc *sc;
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int type;
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{
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bus_space_tag_t bt;
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bt = (bus_space_tag_t)
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malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
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if (bt == NULL)
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panic("could not allocate ebus bus tag");
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bzero(bt, sizeof *bt);
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bt->cookie = sc;
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bt->parent = sc->sc_memtag;
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bt->type = type;
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bt->sparc_bus_map = _ebus_bus_map;
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bt->sparc_bus_mmap = ebus_bus_mmap;
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bt->sparc_intr_establish = ebus_intr_establish;
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return (bt);
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}
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static int
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_ebus_bus_map(t, btype, offset, size, flags, vaddr, hp)
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bus_space_tag_t t;
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bus_type_t btype;
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bus_addr_t offset;
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bus_size_t size;
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int flags;
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vaddr_t vaddr;
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bus_space_handle_t *hp;
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{
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struct ebus_softc *sc = t->cookie;
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bus_addr_t hi, lo;
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int i, ss;
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DPRINTF(EDB_BUSMAP,
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("\n_ebus_bus_map: type %d off %016llx sz %x flags %d va %p",
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(int)t->type, (unsigned long long)offset, (int)size, (int)flags,
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(void *)vaddr));
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hi = offset >> 32UL;
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lo = offset & 0xffffffff;
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DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
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for (i = 0; i < sc->sc_nrange; i++) {
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bus_addr_t pciaddr;
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if (hi != sc->sc_range[i].child_hi)
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continue;
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if (lo < sc->sc_range[i].child_lo ||
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(lo + size) >
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(sc->sc_range[i].child_lo + sc->sc_range[i].size))
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continue;
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/* Isolate address space and find the right tag */
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ss = (sc->sc_range[i].phys_hi>>24)&3;
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switch (ss) {
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case 1: /* I/O space */
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t = sc->sc_iotag;
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break;
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case 2: /* Memory space */
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t = sc->sc_memtag;
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break;
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case 0: /* Config space */
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case 3: /* 64-bit Memory space */
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default: /* WTF? */
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/* We don't handle these */
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panic("_ebus_bus_map: illegal space %x", ss);
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break;
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}
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pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) |
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sc->sc_range[i].phys_lo;
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pciaddr += lo;
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DPRINTF(EDB_BUSMAP,
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("\n_ebus_bus_map: mapping space %x paddr offset %qx pciaddr %qx\n",
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ss, (unsigned long long)offset, (unsigned long long)pciaddr));
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/* pass it onto the psycho */
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return (bus_space_map2(t, sc->sc_range[i].phys_hi,
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pciaddr, size, flags, vaddr, hp));
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}
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DPRINTF(EDB_BUSMAP, (": FAILED\n"));
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return (EINVAL);
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}
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static paddr_t
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ebus_bus_mmap(t, paddr, off, prot, flags)
|
|
bus_space_tag_t t;
|
|
bus_addr_t paddr;
|
|
off_t off;
|
|
int prot;
|
|
int flags;
|
|
{
|
|
bus_addr_t offset = paddr;
|
|
struct ebus_softc *sc = t->cookie;
|
|
int i;
|
|
|
|
for (i = 0; i < sc->sc_nrange; i++) {
|
|
bus_addr_t paddr = ((bus_addr_t)sc->sc_range[i].child_hi << 32) |
|
|
sc->sc_range[i].child_lo;
|
|
|
|
if (offset != paddr)
|
|
continue;
|
|
|
|
DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n",
|
|
(unsigned long long)paddr));
|
|
return (bus_space_mmap(sc->sc_memtag, paddr, off,
|
|
prot, flags));
|
|
}
|
|
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* install an interrupt handler for a ebus device
|
|
*/
|
|
void *
|
|
ebus_intr_establish(t, pri, level, flags, handler, arg)
|
|
bus_space_tag_t t;
|
|
int pri;
|
|
int level;
|
|
int flags;
|
|
int (*handler) __P((void *));
|
|
void *arg;
|
|
{
|
|
|
|
return (bus_intr_establish(t->parent, pri, level, flags, handler, arg));
|
|
}
|