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 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/11.1/sys/powerpc/ofw/ofw_pcib_pci.c 298711 2016-04-27 16:39:05Z jhb $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/module.h>
   34 #include <sys/bus.h>
   35 #include <sys/malloc.h>
   36 #include <sys/kernel.h>
   37 
   38 #include <dev/ofw/openfirm.h>
   39 #include <dev/ofw/ofw_pci.h>
   40 #include <dev/ofw/ofw_bus.h>
   41 #include <dev/ofw/ofw_bus_subr.h>
   42 
   43 #include <dev/pci/pcivar.h>
   44 #include <dev/pci/pcireg.h>
   45 #include <dev/pci/pcib_private.h>
   46 
   47 #include <machine/intr_machdep.h>
   48 
   49 #include "pcib_if.h"
   50 
   51 static int      ofw_pcib_pci_probe(device_t bus);
   52 static int      ofw_pcib_pci_attach(device_t bus);
   53 static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev);
   54 static int      ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev,
   55                     int intpin);
   56 
   57 static device_method_t ofw_pcib_pci_methods[] = {
   58         /* Device interface */
   59         DEVMETHOD(device_probe,         ofw_pcib_pci_probe),
   60         DEVMETHOD(device_attach,        ofw_pcib_pci_attach),
   61 
   62         /* pcib interface */
   63         DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt),
   64 
   65         /* ofw_bus interface */
   66         DEVMETHOD(ofw_bus_get_node,     ofw_pcib_pci_get_node),
   67 
   68         DEVMETHOD_END
   69 };
   70 
   71 static devclass_t pcib_devclass;
   72 
   73 struct ofw_pcib_softc {
   74         /*
   75          * This is here so that we can use pci bridge methods, too - the
   76          * generic routines only need the dev, secbus and subbus members
   77          * filled.
   78          */
   79         struct pcib_softc       ops_pcib_sc;
   80         phandle_t               ops_node;
   81         struct ofw_bus_iinfo    ops_iinfo;
   82 };
   83 
   84 DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods,
   85     sizeof(struct ofw_pcib_softc), pcib_driver);
   86 DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0);
   87 
   88 static int
   89 ofw_pcib_pci_probe(device_t dev)
   90 {
   91 
   92         if ((pci_get_class(dev) != PCIC_BRIDGE) ||
   93             (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) {
   94                 return (ENXIO);
   95         }
   96 
   97         if (ofw_bus_get_node(dev) == -1)
   98                 return (ENXIO);
   99 
  100         device_set_desc(dev, "OFW PCI-PCI bridge");
  101         return (0);
  102 }
  103 
  104 static int
  105 ofw_pcib_pci_attach(device_t dev)
  106 {
  107         struct ofw_pcib_softc *sc;
  108 
  109         sc = device_get_softc(dev);
  110         sc->ops_pcib_sc.dev = dev;
  111         sc->ops_node = ofw_bus_get_node(dev);
  112 
  113         ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo,
  114             sizeof(cell_t));
  115 
  116         pcib_attach_common(dev);
  117         return (pcib_attach_child(dev));
  118 }
  119 
  120 static phandle_t
  121 ofw_pcib_pci_get_node(device_t bridge, device_t dev)
  122 {
  123         /* We have only one child, the PCI bus, so pass it our node */
  124 
  125         return (ofw_bus_get_node(bridge));
  126 }
  127 
  128 static int
  129 ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin)
  130 {
  131         struct ofw_pcib_softc *sc;
  132         struct ofw_bus_iinfo *ii;
  133         struct ofw_pci_register reg;
  134         cell_t pintr, mintr[2];
  135         int intrcells;
  136         phandle_t iparent;
  137 
  138         sc = device_get_softc(bridge);
  139         ii = &sc->ops_iinfo;
  140         if (ii->opi_imapsz > 0) {
  141                 pintr = intpin;
  142 
  143                 /* Fabricate imap information if this isn't an OFW device */
  144                 bzero(&reg, sizeof(reg));
  145                 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) |
  146                     (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) |
  147                     (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT);
  148 
  149                 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, &reg,
  150                     sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr),
  151                     &iparent);
  152                 if (intrcells) {
  153                         /*
  154                          * If we've found a mapping, return it and don't map
  155                          * it again on higher levels - that causes problems
  156                          * in some cases, and never seems to be required.
  157                          */
  158                         mintr[0] = ofw_bus_map_intr(dev, iparent, intrcells,
  159                             mintr);
  160                         return (mintr[0]);
  161                 }
  162         } else if (intpin >= 1 && intpin <= 4) {
  163                 /*
  164                  * When an interrupt map is missing, we need to do the
  165                  * standard PCI swizzle and continue mapping at the parent.
  166                  */
  167                 return (pcib_route_interrupt(bridge, dev, intpin));
  168         }
  169         return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent(
  170             bridge)), bridge, intpin));
  171 }
  172

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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