ofw_pcib_pci.c

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    1 /*-
    2  * Copyright (c) 2000 Michael Smith
    3  * Copyright (c) 2000 BSDi
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/9.0/sys/powerpc/ofw/ofw_pcib_pci.c 218184 2011-02-02 05:58:51Z marcel $
   28  */
   29 
   30 #include <sys/param.h>
   31 #include <sys/module.h>
   32 #include <sys/bus.h>
   33 #include <sys/malloc.h>
   34 #include <sys/kernel.h>
   35 
   36 #include <dev/ofw/openfirm.h>
   37 #include <dev/ofw/ofw_pci.h>
   38 #include <dev/ofw/ofw_bus.h>
   39 #include <dev/ofw/ofw_bus_subr.h>
   40 
   41 #include <dev/pci/pcivar.h>
   42 #include <dev/pci/pcireg.h>
   43 #include <dev/pci/pcib_private.h>
   44 
   45 #include <machine/intr_machdep.h>
   46 
   47 #include "pcib_if.h"
   48 
   49 static int      ofw_pcib_pci_probe(device_t bus);
   50 static int      ofw_pcib_pci_attach(device_t bus);
   51 static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev);
   52 static int      ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev,
   53                     int intpin);
   54 
   55 static device_method_t ofw_pcib_pci_methods[] = {
   56         /* Device interface */
   57         DEVMETHOD(device_probe,         ofw_pcib_pci_probe),
   58         DEVMETHOD(device_attach,                ofw_pcib_pci_attach),
   59         DEVMETHOD(device_shutdown,              bus_generic_shutdown),
   60         DEVMETHOD(device_suspend,               bus_generic_suspend),
   61         DEVMETHOD(device_resume,                bus_generic_resume),
   62 
   63         /* Bus interface */
   64         DEVMETHOD(bus_print_child,              bus_generic_print_child),
   65         DEVMETHOD(bus_read_ivar,                pcib_read_ivar),
   66         DEVMETHOD(bus_write_ivar,               pcib_write_ivar),
   67         DEVMETHOD(bus_alloc_resource,   pcib_alloc_resource),
   68         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
   69         DEVMETHOD(bus_activate_resource,        bus_generic_activate_resource),
   70         DEVMETHOD(bus_deactivate_resource,      bus_generic_deactivate_resource),
   71         DEVMETHOD(bus_setup_intr,               bus_generic_setup_intr),
   72         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   73 
   74         /* pcib interface */
   75         DEVMETHOD(pcib_maxslots,                pcib_maxslots),
   76         DEVMETHOD(pcib_read_config,             pcib_read_config),
   77         DEVMETHOD(pcib_write_config,    pcib_write_config),
   78         DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt),
   79         DEVMETHOD(pcib_alloc_msi,       pcib_alloc_msi),
   80         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
   81         DEVMETHOD(pcib_alloc_msix,      pcib_alloc_msix),
   82         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
   83         DEVMETHOD(pcib_map_msi,         pcib_map_msi),
   84 
   85         /* ofw_bus interface */
   86         DEVMETHOD(ofw_bus_get_node,     ofw_pcib_pci_get_node),
   87 
   88         {0, 0}
   89 };
   90 
   91 static devclass_t pcib_devclass;
   92 
   93 struct ofw_pcib_softc {
   94         /*
   95          * This is here so that we can use pci bridge methods, too - the
   96          * generic routines only need the dev, secbus and subbus members
   97          * filled.
   98          */
   99         struct pcib_softc       ops_pcib_sc;
  100         phandle_t               ops_node;
  101         struct ofw_bus_iinfo    ops_iinfo;
  102 };
  103 
  104 
  105 DEFINE_CLASS_0(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods,
  106     sizeof(struct ofw_pcib_softc));
  107 DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0);
  108 
  109 static int
  110 ofw_pcib_pci_probe(device_t dev)
  111 {
  112 
  113         if ((pci_get_class(dev) != PCIC_BRIDGE) ||
  114             (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) {
  115                 return (ENXIO);
  116         }
  117 
  118         if (ofw_bus_get_node(dev) == 0)
  119                 return (ENXIO);
  120 
  121         device_set_desc(dev, "OFW PCI-PCI bridge");
  122         return (0);
  123 }
  124 
  125 static int
  126 ofw_pcib_pci_attach(device_t dev)
  127 {
  128         struct ofw_pcib_softc *sc;
  129 
  130         sc = device_get_softc(dev);
  131         sc->ops_pcib_sc.dev = dev;
  132         sc->ops_node = ofw_bus_get_node(dev);
  133 
  134         ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo,
  135             sizeof(cell_t));
  136 
  137         pcib_attach_common(dev);
  138 
  139         device_add_child(dev, "pci", -1);
  140 
  141         return (bus_generic_attach(dev));
  142 }
  143 
  144 static phandle_t
  145 ofw_pcib_pci_get_node(device_t bridge, device_t dev)
  146 {
  147         /* We have only one child, the PCI bus, so pass it our node */
  148 
  149         return (ofw_bus_get_node(bridge));
  150 }
  151 
  152 static int
  153 ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin)
  154 {
  155         struct ofw_pcib_softc *sc;
  156         struct ofw_bus_iinfo *ii;
  157         struct ofw_pci_register reg;
  158         cell_t pintr, mintr;
  159         phandle_t iparent;
  160         uint8_t maskbuf[sizeof(reg) + sizeof(pintr)];
  161 
  162         sc = device_get_softc(bridge);
  163         ii = &sc->ops_iinfo;
  164         if (ii->opi_imapsz > 0) {
  165                 pintr = intpin;
  166                 if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, &reg,
  167                     sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr),
  168                     &iparent, maskbuf)) {
  169                         /*
  170                          * If we've found a mapping, return it and don't map
  171                          * it again on higher levels - that causes problems
  172                          * in some cases, and never seems to be required.
  173                          */
  174                         return (MAP_IRQ(iparent, mintr));
  175                 }
  176         } else if (intpin >= 1 && intpin <= 4) {
  177                 /*
  178                  * When an interrupt map is missing, we need to do the
  179                  * standard PCI swizzle and continue mapping at the parent.
  180                  */
  181                 return (pcib_route_interrupt(bridge, dev, intpin));
  182         }
  183         return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent(
  184             bridge)), bridge, intpin));
  185 }
  186

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/ofw/ofw_pcib_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/ofw/ofw_pcib_pci.c