FreeBSD/Linux Kernel Cross Reference
sys/dev/ofw/ofw_pci.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2021 Alstom Group.
      * Copyright (c) 2021 Semihalf.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pci_private.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include "pcib_if.h"
    #include "pci_if.h"
    
    static int      ofw_pci_probe(device_t);
    static const struct ofw_bus_devinfo* pci_ofw_get_devinfo(device_t, device_t);
    
    static device_method_t ofw_pci_methods[] = {
            DEVMETHOD(device_probe,         ofw_pci_probe),
    
            /* ofw_bus interface */
            DEVMETHOD(ofw_bus_get_devinfo,  pci_ofw_get_devinfo),
            DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
            DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
            DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
            DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
            DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
    
            DEVMETHOD_END
    };
    
    DEFINE_CLASS_1(pci, ofw_pci_driver, ofw_pci_methods, sizeof(struct pci_softc),
        pci_driver);
    DRIVER_MODULE(ofw_pci, pcib, ofw_pci_driver, 0, 0);
    MODULE_DEPEND(ofw_pci, simplebus, 1, 1, 1);
    MODULE_DEPEND(ofw_pci, pci, 1, 1, 1);
    MODULE_VERSION(ofw_pci, 1);
    
    static int
    ofw_pci_probe(device_t dev)
    {
            device_t parent;
    
            parent = device_get_parent(dev);
            if (ofw_bus_get_node(parent) == -1)
                    return (ENXIO);
    
            device_set_desc(dev, "OFW PCI bus");
            return (BUS_PROBE_DEFAULT);
    }
    
    /* Pass the request up to our parent. */
    static const struct ofw_bus_devinfo*
    pci_ofw_get_devinfo(device_t bus, device_t dev)
    {
    
            return OFW_BUS_GET_DEVINFO(device_get_parent(bus), dev);
    }

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