ab72721aed
ofw_bus_gen_get_*() for providing the ofw_bus KOBJ interface in order to reduce code duplication. - While here sync the various sparc64 bus drivers a bit (handle failure to attach a child gracefully instead of panicing, move the printing of child resources common to bus_print_child() and bus_probe_nomatch() implementations of a bus into a <bus>_print_res() function, ...) and fix some minor bugs and nits (plug memory leaks present when attaching a bus or child device fails, remove unused struct members, ...). Additional testing by: kris (central(4) and fhc(4))
465 lines
13 KiB
C
465 lines
13 KiB
C
/*-
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* Copyright (c) 1999, 2000 Matthew R. Green
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* Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
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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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* from: NetBSD: ebus.c,v 1.26 2001/09/10 16:27:53 eeh Exp
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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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* - ebus2 dma code is completely unwritten
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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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* XXX: This is PCI specific, however, there exist SBus-to-EBus bridges...
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* XXX: The EBus was designed to allow easy adaption of ISA devices to it - a
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* compatability layer for ISA devices might be nice, although probably not
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* easily possible because of some cruft (like in[bwl]/out[bwl] and friends).
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* Additionally, the existing ISA code is limited to one ISA bus, however,
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* there are machines with both ISA and EBus.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/ofw_bus.h>
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#include <machine/resource.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <sparc64/pci/ofw_pci.h>
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/*
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* The register, ranges and interrupt map properties are identical to the ISA
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* ones.
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*/
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#include <sparc64/isa/ofw_isa.h>
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struct ebus_devinfo {
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struct ofw_bus_devinfo edi_obdinfo;
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struct resource_list edi_rl;
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};
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struct ebus_rinfo {
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int eri_rtype;
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struct rman eri_rman;
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struct resource *eri_res;
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};
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struct ebus_softc {
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phandle_t sc_node;
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struct isa_ranges *sc_range;
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struct ebus_rinfo *sc_rinfo;
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int sc_nrange;
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struct ofw_bus_iinfo sc_iinfo;
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};
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static device_probe_t ebus_probe;
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static device_attach_t ebus_attach;
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static bus_print_child_t ebus_print_child;
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static bus_probe_nomatch_t ebus_probe_nomatch;
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static bus_alloc_resource_t ebus_alloc_resource;
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static bus_release_resource_t ebus_release_resource;
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static bus_get_resource_list_t ebus_get_resource_list;
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static ofw_bus_get_devinfo_t ebus_get_devinfo;
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static struct ebus_devinfo *ebus_setup_dinfo(device_t, struct ebus_softc *,
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phandle_t);
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static void ebus_destroy_dinfo(struct ebus_devinfo *);
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static int ebus_print_res(struct ebus_devinfo *);
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static device_method_t ebus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ebus_probe),
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DEVMETHOD(device_attach, ebus_attach),
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/* Bus interface */
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DEVMETHOD(bus_print_child, ebus_print_child),
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DEVMETHOD(bus_probe_nomatch, ebus_probe_nomatch),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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DEVMETHOD(bus_alloc_resource, ebus_alloc_resource),
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DEVMETHOD(bus_get_resource_list, ebus_get_resource_list),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_release_resource, ebus_release_resource),
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DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, ebus_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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{ 0, 0 }
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};
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static driver_t ebus_driver = {
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"ebus",
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ebus_methods,
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sizeof(struct ebus_softc),
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};
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static devclass_t ebus_devclass;
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DRIVER_MODULE(ebus, pci, ebus_driver, ebus_devclass, 0, 0);
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static int
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ebus_probe(device_t dev)
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{
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if (pci_get_class(dev) != PCIC_BRIDGE ||
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pci_get_vendor(dev) != 0x108e ||
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strcmp(ofw_bus_get_name(dev), "ebus") != 0)
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return (ENXIO);
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if (pci_get_device(dev) == 0x1000)
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device_set_desc(dev, "PCI-EBus2 bridge");
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else if (pci_get_device(dev) == 0x1100)
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device_set_desc(dev, "PCI-EBus3 bridge");
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else
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return (ENXIO);
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return (0);
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}
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static int
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ebus_attach(device_t dev)
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{
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struct ebus_softc *sc;
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struct ebus_devinfo *edi;
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struct ebus_rinfo *eri;
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struct resource *res;
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device_t cdev;
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phandle_t node;
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int i, rnum, rid;
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sc = device_get_softc(dev);
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sc->sc_node = node = ofw_bus_get_node(dev);
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sc->sc_nrange = OF_getprop_alloc(node, "ranges",
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sizeof(*sc->sc_range), (void **)&sc->sc_range);
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if (sc->sc_nrange == -1) {
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printf("ebus_attach: could not get ranges property\n");
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return (ENXIO);
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}
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sc->sc_rinfo = malloc(sizeof(*sc->sc_rinfo) * sc->sc_nrange, M_DEVBUF,
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M_WAITOK | M_ZERO);
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/* For every range, there must be a matching resource. */
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for (rnum = 0; rnum < sc->sc_nrange; rnum++) {
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eri = &sc->sc_rinfo[rnum];
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eri->eri_rtype = ofw_isa_range_restype(&sc->sc_range[rnum]);
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rid = PCIR_BAR(rnum);
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res = bus_alloc_resource_any(dev, eri->eri_rtype, &rid,
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RF_ACTIVE);
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if (res == NULL) {
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printf("ebus_attach: failed to allocate range "
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"resource!\n");
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goto fail;
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}
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eri->eri_res = res;
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eri->eri_rman.rm_type = RMAN_ARRAY;
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eri->eri_rman.rm_descr = "EBus range";
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if (rman_init(&eri->eri_rman) != 0) {
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printf("ebus_attach: failed to initialize rman!");
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goto fail;
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}
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if (rman_manage_region(&eri->eri_rman, rman_get_start(res),
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rman_get_end(res)) != 0) {
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printf("ebus_attach: failed to register region!");
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rman_fini(&eri->eri_rman);
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goto fail;
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}
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}
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ofw_bus_setup_iinfo(node, &sc->sc_iinfo, sizeof(ofw_isa_intr_t));
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/*
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* Now attach our children.
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*/
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for (node = OF_child(node); node > 0; node = OF_peer(node)) {
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if ((edi = ebus_setup_dinfo(dev, sc, node)) == NULL)
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continue;
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if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
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device_printf(dev, "<%s>: device_add_child failed\n",
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edi->edi_obdinfo.obd_name);
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ebus_destroy_dinfo(edi);
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continue;
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}
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device_set_ivars(cdev, edi);
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}
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return (bus_generic_attach(dev));
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fail:
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for (i = rnum; i >= 0; i--) {
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eri = &sc->sc_rinfo[i];
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if (i < rnum)
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rman_fini(&eri->eri_rman);
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if (eri->eri_res != 0) {
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bus_release_resource(dev, eri->eri_rtype,
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PCIR_BAR(rnum), eri->eri_res);
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}
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}
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free(sc->sc_rinfo, M_DEVBUF);
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free(sc->sc_range, M_OFWPROP);
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return (ENXIO);
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}
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static int
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ebus_print_child(device_t dev, device_t child)
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{
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int retval;
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retval = bus_print_child_header(dev, child);
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retval += ebus_print_res(device_get_ivars(child));
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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static void
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ebus_probe_nomatch(device_t dev, device_t child)
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{
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device_printf(dev, "<%s>", ofw_bus_get_name(child));
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ebus_print_res(device_get_ivars(child));
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printf(" (no driver attached)\n");
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}
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static struct resource *
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ebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct ebus_softc *sc;
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struct resource_list *rl;
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struct resource_list_entry *rle = NULL;
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struct resource *res;
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struct ebus_rinfo *ri;
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bus_space_tag_t bt;
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bus_space_handle_t bh;
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int passthrough = (device_get_parent(child) != bus);
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int isdefault = (start == 0UL && end == ~0UL);
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int ridx, rv;
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sc = (struct ebus_softc *)device_get_softc(bus);
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rl = BUS_GET_RESOURCE_LIST(bus, child);
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/*
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* Map ebus ranges to PCI ranges. This may include changing the
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* allocation type.
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*/
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switch (type) {
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case SYS_RES_MEMORY:
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KASSERT(!(isdefault && passthrough),
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("ebus_alloc_resource: passthrough of default alloc"));
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if (!passthrough) {
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rle = resource_list_find(rl, type, *rid);
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if (rle == NULL)
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return (NULL);
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KASSERT(rle->res == NULL,
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("ebus_alloc_resource: resource entry is busy"));
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if (isdefault) {
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start = rle->start;
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count = ulmax(count, rle->count);
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end = ulmax(rle->end, start + count - 1);
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}
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}
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(void)ofw_isa_range_map(sc->sc_range, sc->sc_nrange,
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&start, &end, &ridx);
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ri = &sc->sc_rinfo[ridx];
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res = rman_reserve_resource(&ri->eri_rman, start, end, count,
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flags, child);
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if (res == NULL)
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return (NULL);
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bt = rman_get_bustag(ri->eri_res);
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rman_set_bustag(res, bt);
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rv = bus_space_subregion(bt, rman_get_bushandle(ri->eri_res),
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rman_get_start(res) - rman_get_start(ri->eri_res), count,
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&bh);
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if (rv != 0) {
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rman_release_resource(res);
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return (NULL);
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}
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rman_set_bushandle(res, bh);
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if (!passthrough)
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rle->res = res;
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return (res);
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case SYS_RES_IRQ:
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return (resource_list_alloc(rl, bus, child, type, rid, start,
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end, count, flags));
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}
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return (NULL);
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}
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int
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ebus_release_resource(device_t bus, device_t child, int type, int rid,
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struct resource *res)
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{
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struct resource_list *rl;
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struct resource_list_entry *rle;
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int passthrough = (device_get_parent(child) != bus);
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int rv;
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rl = BUS_GET_RESOURCE_LIST(bus, child);
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switch (type) {
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case SYS_RES_MEMORY:
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if ((rv = rman_release_resource(res)) != 0)
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return (rv);
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if (!passthrough) {
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rle = resource_list_find(rl, type, rid);
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KASSERT(rle != NULL, ("ebus_release_resource: "
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"resource entry not found!"));
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KASSERT(rle->res != NULL, ("ebus_alloc_resource: "
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"resource entry is not busy"));
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rle->res = NULL;
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}
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break;
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case SYS_RES_IRQ:
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return (resource_list_release(rl, bus, child, type, rid, res));
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default:
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panic("ebus_release_resource: unsupported resource type %d",
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type);
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}
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return (0);
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}
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static struct resource_list *
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ebus_get_resource_list(device_t dev, device_t child)
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{
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struct ebus_devinfo *edi;
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edi = device_get_ivars(child);
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return (&edi->edi_rl);
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}
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static const struct ofw_bus_devinfo *
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ebus_get_devinfo(device_t bus, device_t dev)
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{
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struct ebus_devinfo *edi;
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edi = device_get_ivars(dev);
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return (&edi->edi_obdinfo);
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}
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static struct ebus_devinfo *
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ebus_setup_dinfo(device_t dev, struct ebus_softc *sc, phandle_t node)
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{
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struct ebus_devinfo *edi;
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struct isa_regs *reg;
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ofw_isa_intr_t *intrs;
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ofw_pci_intr_t rintr;
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u_int64_t start;
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int nreg, nintr, i;
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edi = malloc(sizeof(*edi), M_DEVBUF, M_ZERO | M_WAITOK);
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if (ofw_bus_gen_setup_devinfo(&edi->edi_obdinfo, node) != 0) {
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free(edi, M_DEVBUF);
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return (NULL);
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}
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resource_list_init(&edi->edi_rl);
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nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)®);
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if (nreg == -1) {
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device_printf(dev, "<%s>: incomplete\n",
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edi->edi_obdinfo.obd_name);
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goto fail;
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}
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for (i = 0; i < nreg; i++) {
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start = ISA_REG_PHYS(reg + i);
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resource_list_add(&edi->edi_rl, SYS_RES_MEMORY, i,
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start, start + reg[i].size - 1, reg[i].size);
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}
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free(reg, M_OFWPROP);
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nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs),
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(void **)&intrs);
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for (i = 0; i < nintr; i++) {
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rintr = ofw_isa_route_intr(dev, node, &sc->sc_iinfo, intrs[i]);
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if (rintr == PCI_INVALID_IRQ) {
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device_printf(dev,
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"<%s>: could not map EBus interrupt %d\n",
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edi->edi_obdinfo.obd_name, intrs[i]);
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free(reg, M_OFWPROP);
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goto fail;
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}
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resource_list_add(&edi->edi_rl, SYS_RES_IRQ, i,
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rintr, rintr, 1);
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}
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free(intrs, M_OFWPROP);
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return (edi);
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fail:
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ebus_destroy_dinfo(edi);
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return (NULL);
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}
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static void
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ebus_destroy_dinfo(struct ebus_devinfo *edi)
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{
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resource_list_free(&edi->edi_rl);
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ofw_bus_gen_destroy_devinfo(&edi->edi_obdinfo);
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free(edi, M_DEVBUF);
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}
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static int
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ebus_print_res(struct ebus_devinfo *edi)
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{
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int retval;
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retval = 0;
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retval += resource_list_print_type(&edi->edi_rl, "addr", SYS_RES_MEMORY,
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"%#lx");
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retval += resource_list_print_type(&edi->edi_rl, "irq", SYS_RES_IRQ,
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"%ld");
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return (retval);
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}
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