The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
    5  * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
    6  * Copyright (c) 2000 BSDi
    7  * Copyright (c) 2001 - 2003 Thomas Moestl <tmm@FreeBSD.org>
    8  * Copyright (c) 2009 by Marius Strobl <marius@FreeBSD.org>
    9  * All rights reserved.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. The name of the author may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13
   35  */
   36 
   37 #include <sys/cdefs.h>
   38 __FBSDID("$FreeBSD$");
   39 
   40 #include "opt_ofw_pci.h"
   41 
   42 #include <sys/param.h>
   43 #include <sys/bus.h>
   44 #include <sys/kernel.h>
   45 #include <sys/libkern.h>
   46 #include <sys/module.h>
   47 #include <sys/rman.h>
   48 
   49 #include <dev/ofw/ofw_bus.h>
   50 #include <dev/ofw/openfirm.h>
   51 
   52 #include <dev/pci/pcireg.h>
   53 #include <dev/pci/pcivar.h>
   54 #include <dev/pci/pcib_private.h>
   55 
   56 #include "pcib_if.h"
   57 
   58 #include <sparc64/pci/ofw_pci.h>
   59 #include <sparc64/pci/ofw_pcib_subr.h>
   60 
   61 #define PCI_DEVID_ALI_M5249     0x524910b9
   62 #define PCI_VENDOR_PLX          0x10b5
   63 
   64 static device_probe_t ofw_pcib_probe;
   65 static device_attach_t ofw_pcib_attach;
   66 static ofw_pci_setup_device_t ofw_pcib_setup_device;
   67 
   68 static device_method_t ofw_pcib_methods[] = {
   69         /* Device interface */
   70         DEVMETHOD(device_probe,         ofw_pcib_probe),
   71         DEVMETHOD(device_attach,        ofw_pcib_attach),
   72 
   73         /* Bus interface */
   74 
   75         /* pcib interface */
   76         DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt),
   77         DEVMETHOD(pcib_request_feature, pcib_request_feature_allow),
   78 
   79         /* ofw_bus interface */
   80         DEVMETHOD(ofw_bus_get_node,     ofw_pcib_gen_get_node),
   81         DEVMETHOD(ofw_pci_setup_device, ofw_pcib_setup_device),
   82 
   83         DEVMETHOD_END
   84 };
   85 
   86 static devclass_t pcib_devclass;
   87 
   88 DEFINE_CLASS_1(pcib, ofw_pcib_driver, ofw_pcib_methods,
   89     sizeof(struct ofw_pcib_gen_softc), pcib_driver);
   90 EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_driver, pcib_devclass, NULL, NULL,
   91     BUS_PASS_BUS);
   92 MODULE_DEPEND(ofw_pcib, pci, 1, 1, 1);
   93 
   94 static int
   95 ofw_pcib_probe(device_t dev)
   96 {
   97         char desc[sizeof("OFW PCIe-PCIe bridge")];
   98         const char *dtype, *pbdtype;
   99 
  100 #define ISDTYPE(dtype, type)                                            \
  101         (((dtype) != NULL) && strcmp((dtype), (type)) == 0)
  102 
  103         if ((pci_get_class(dev) == PCIC_BRIDGE) &&
  104             (pci_get_subclass(dev) == PCIS_BRIDGE_PCI) &&
  105             ofw_bus_get_node(dev) != 0) {
  106                 dtype = ofw_bus_get_type(dev);
  107                 pbdtype = ofw_bus_get_type(device_get_parent(
  108                     device_get_parent(dev)));
  109                 snprintf(desc, sizeof(desc), "OFW PCI%s-PCI%s bridge",
  110                     ISDTYPE(pbdtype, OFW_TYPE_PCIE) ? "e" : "",
  111                     ISDTYPE(dtype, OFW_TYPE_PCIE) ? "e" : "");
  112                 device_set_desc_copy(dev, desc);
  113                 return (BUS_PROBE_DEFAULT);
  114         }
  115 
  116 #undef ISDTYPE
  117 
  118         return (ENXIO);
  119 }
  120 
  121 static int
  122 ofw_pcib_attach(device_t dev)
  123 {
  124         struct ofw_pcib_gen_softc *sc;
  125 
  126         sc = device_get_softc(dev);
  127 
  128         switch (pci_get_devid(dev)) {
  129         /*
  130          * The ALi M5249 found in Fire-based machines by definition must me
  131          * subtractive as they have a ISA bridge on their secondary side but
  132          * don't indicate this in the class code although the ISA I/O range
  133          * isn't included in their bridge decode.
  134          */
  135         case PCI_DEVID_ALI_M5249:
  136                 sc->ops_pcib_sc.flags |= PCIB_SUBTRACTIVE;
  137                 break;
  138         }
  139 
  140         switch (pci_get_vendor(dev)) {
  141         /*
  142          * Concurrently write the primary and secondary bus numbers in order
  143          * to work around a bug in PLX PEX 8114 causing the internal shadow
  144          * copies of these not to be updated when setting them bytewise.
  145          */
  146         case PCI_VENDOR_PLX:
  147                 pci_write_config(dev, PCIR_PRIBUS_1,
  148                     pci_read_config(dev, PCIR_SECBUS_1, 1) << 8 |
  149                     pci_read_config(dev, PCIR_PRIBUS_1, 1), 2);
  150                 break;
  151         }
  152 
  153         ofw_pcib_gen_setup(dev);
  154         pcib_attach_common(dev);
  155         return (pcib_attach_child(dev));
  156 }
  157 
  158 static void
  159 ofw_pcib_setup_device(device_t bus, device_t child)
  160 {
  161         int i;
  162         uint16_t reg;
  163 
  164         switch (pci_get_vendor(bus)) {
  165         /*
  166          * For PLX PEX 8532 issue 64 TLPs to the child from the downstream
  167          * port to the child device in order to work around a hardware bug.
  168          */
  169         case PCI_VENDOR_PLX:
  170                 for (i = 0, reg = 0; i < 64; i++)
  171                         reg |= pci_get_devid(child);
  172                 break;
  173         }
  174 
  175         OFW_PCI_SETUP_DEVICE(device_get_parent(bus), child);
  176 }

Cache object: 9352ca238c5d6a96a7b56bac7bf22224


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