FreeBSD/Linux Kernel Cross Reference
sys/sparc64/pci/ofw_pcib.c

     /*-
      * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
      * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
      * Copyright (c) 2000 BSDi
      * Copyright (c) 2001 - 2003 Thomas Moestl <tmm@FreeBSD.org>
      * Copyright (c) 2009 by Marius Strobl <marius@FreeBSD.org>
      * All rights reserved.
      *
      * 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.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     *
     *      from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.2/sys/sparc64/pci/ofw_pcib.c 298711 2016-04-27 16:39:05Z jhb $");
    
    #include "opt_ofw_pci.h"
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/libkern.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/openfirm.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcib_private.h>
    
    #include "pcib_if.h"
    
    #include <sparc64/pci/ofw_pci.h>
    #include <sparc64/pci/ofw_pcib_subr.h>
    
    #define PCI_DEVID_ALI_M5249     0x524910b9
    #define PCI_VENDOR_PLX          0x10b5
    
    static device_probe_t ofw_pcib_probe;
    static device_attach_t ofw_pcib_attach;
    static ofw_pci_setup_device_t ofw_pcib_setup_device;
    
    static device_method_t ofw_pcib_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         ofw_pcib_probe),
            DEVMETHOD(device_attach,        ofw_pcib_attach),
    
            /* Bus interface */
    
            /* pcib interface */
            DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt),
    
            /* ofw_bus interface */
            DEVMETHOD(ofw_bus_get_node,     ofw_pcib_gen_get_node),
            DEVMETHOD(ofw_pci_setup_device, ofw_pcib_setup_device),
    
            DEVMETHOD_END
    };
    
    static devclass_t pcib_devclass;
    
    DEFINE_CLASS_1(pcib, ofw_pcib_driver, ofw_pcib_methods,
        sizeof(struct ofw_pcib_gen_softc), pcib_driver);
    EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_driver, pcib_devclass, NULL, NULL,
        BUS_PASS_BUS);
    MODULE_DEPEND(ofw_pcib, pci, 1, 1, 1);
    
    static int
    ofw_pcib_probe(device_t dev)
    {
            char desc[sizeof("OFW PCIe-PCIe bridge")];
            const char *dtype, *pbdtype;
    
    #define ISDTYPE(dtype, type)                                            \
            (((dtype) != NULL) && strcmp((dtype), (type)) == 0)
    
           if ((pci_get_class(dev) == PCIC_BRIDGE) &&
               (pci_get_subclass(dev) == PCIS_BRIDGE_PCI) &&
               ofw_bus_get_node(dev) != 0) {
                   dtype = ofw_bus_get_type(dev);
                   pbdtype = ofw_bus_get_type(device_get_parent(
                       device_get_parent(dev)));
                   snprintf(desc, sizeof(desc), "OFW PCI%s-PCI%s bridge",
                       ISDTYPE(pbdtype, OFW_TYPE_PCIE) ? "e" : "",
                       ISDTYPE(dtype, OFW_TYPE_PCIE) ? "e" : "");
                   device_set_desc_copy(dev, desc);
                   return (BUS_PROBE_DEFAULT);
           }
   
   #undef ISDTYPE
   
           return (ENXIO);
   }
   
   static int
   ofw_pcib_attach(device_t dev)
   {
           struct ofw_pcib_gen_softc *sc;
   
           sc = device_get_softc(dev);
   
           switch (pci_get_devid(dev)) {
           /*
            * The ALi M5249 found in Fire-based machines by definition must me
            * subtractive as they have a ISA bridge on their secondary side but
            * don't indicate this in the class code although the ISA I/O range
            * isn't included in their bridge decode.
            */
           case PCI_DEVID_ALI_M5249:
                   sc->ops_pcib_sc.flags |= PCIB_SUBTRACTIVE;
                   break;
           }
   
           switch (pci_get_vendor(dev)) {
           /*
            * Concurrently write the primary and secondary bus numbers in order
            * to work around a bug in PLX PEX 8114 causing the internal shadow
            * copies of these not to be updated when setting them bytewise.
            */
           case PCI_VENDOR_PLX:
                   pci_write_config(dev, PCIR_PRIBUS_1,
                       pci_read_config(dev, PCIR_SECBUS_1, 1) << 8 |
                       pci_read_config(dev, PCIR_PRIBUS_1, 1), 2);
                   break;
           }
   
           ofw_pcib_gen_setup(dev);
           pcib_attach_common(dev);
           return (pcib_attach_child(dev));
   }
   
   static void
   ofw_pcib_setup_device(device_t bus, device_t child)
   {
           int i;
           uint16_t reg;
   
           switch (pci_get_vendor(bus)) {
           /*
            * For PLX PEX 8532 issue 64 TLPs to the child from the downstream
            * port to the child device in order to work around a hardware bug.
            */
           case PCI_VENDOR_PLX:
                   for (i = 0, reg = 0; i < 64; i++)
                           reg |= pci_get_devid(child);
                   break;
           }
   
           OFW_PCI_SETUP_DEVICE(device_get_parent(bus), child);
   }

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