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/arm64/cavium/thunder_pcie_fdt.c

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    1 /*
    2  * Copyright (C) 2016 Cavium Inc.
    3  * All rights reserved.
    4  *
    5  * Developed by Semihalf.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 #include "opt_platform.h"
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/11.0/sys/arm64/cavium/thunder_pcie_fdt.c 301031 2016-05-31 09:15:21Z andrew $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/malloc.h>
   36 #include <sys/types.h>
   37 #include <sys/sysctl.h>
   38 #include <sys/kernel.h>
   39 #include <sys/rman.h>
   40 #include <sys/module.h>
   41 #include <sys/bus.h>
   42 #include <sys/endian.h>
   43 #include <sys/cpuset.h>
   44 
   45 #include <dev/ofw/openfirm.h>
   46 #include <dev/ofw/ofw_bus.h>
   47 #include <dev/ofw/ofw_bus_subr.h>
   48 
   49 #include <dev/pci/pcireg.h>
   50 #include <dev/pci/pcivar.h>
   51 #include <dev/pci/pci_host_generic.h>
   52 #include <dev/pci/pcib_private.h>
   53 
   54 #include "thunder_pcie_common.h"
   55 
   56 #include "pcib_if.h"
   57 
   58 #ifdef THUNDERX_PASS_1_1_ERRATA
   59 static struct resource * thunder_pcie_fdt_alloc_resource(device_t, device_t,
   60     int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
   61 #endif
   62 static int thunder_pcie_fdt_attach(device_t);
   63 static int thunder_pcie_fdt_probe(device_t);
   64 static int thunder_pcie_fdt_get_id(device_t, device_t, enum pci_id_type,
   65     uintptr_t *);
   66 
   67 static device_method_t thunder_pcie_fdt_methods[] = {
   68         /* Device interface */
   69         DEVMETHOD(device_probe,         thunder_pcie_fdt_probe),
   70         DEVMETHOD(device_attach,        thunder_pcie_fdt_attach),
   71 #ifdef THUNDERX_PASS_1_1_ERRATA
   72         DEVMETHOD(bus_alloc_resource,   thunder_pcie_fdt_alloc_resource),
   73 #endif
   74 
   75         /* pcib interface */
   76         DEVMETHOD(pcib_get_id,          thunder_pcie_fdt_get_id),
   77 
   78         /* End */
   79         DEVMETHOD_END
   80 };
   81 
   82 DEFINE_CLASS_1(pcib, thunder_pcie_fdt_driver, thunder_pcie_fdt_methods,
   83     sizeof(struct generic_pcie_softc), generic_pcie_driver);
   84 
   85 static devclass_t thunder_pcie_fdt_devclass;
   86 
   87 DRIVER_MODULE(thunder_pcib, simplebus, thunder_pcie_fdt_driver,
   88     thunder_pcie_fdt_devclass, 0, 0);
   89 DRIVER_MODULE(thunder_pcib, ofwbus, thunder_pcie_fdt_driver,
   90     thunder_pcie_fdt_devclass, 0, 0);
   91 
   92 
   93 static int
   94 thunder_pcie_fdt_probe(device_t dev)
   95 {
   96 
   97         /* Check if we're running on Cavium ThunderX */
   98         if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
   99             CPU_IMPL_CAVIUM, CPU_PART_THUNDER, 0, 0))
  100                 return (ENXIO);
  101 
  102         if (!ofw_bus_status_okay(dev))
  103                 return (ENXIO);
  104 
  105         if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic") ||
  106             ofw_bus_is_compatible(dev, "cavium,thunder-pcie") ||
  107             ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-ecam")) {
  108                 device_set_desc(dev, "Cavium Integrated PCI/PCI-E Controller");
  109                 return (BUS_PROBE_DEFAULT);
  110         }
  111 
  112         return (ENXIO);
  113 }
  114 
  115 static int
  116 thunder_pcie_fdt_attach(device_t dev)
  117 {
  118         struct generic_pcie_softc *sc;
  119 
  120         sc = device_get_softc(dev);
  121         thunder_pcie_identify_ecam(dev, &sc->ecam);
  122         sc->coherent = 1;
  123 
  124         return (pci_host_generic_attach(dev));
  125 }
  126 
  127 static int
  128 thunder_pcie_fdt_get_id(device_t pci, device_t child, enum pci_id_type type,
  129     uintptr_t *id)
  130 {
  131         phandle_t node;
  132         int bsf;
  133 
  134         if (type != PCI_ID_MSI)
  135                 return (pcib_get_id(pci, child, type, id));
  136 
  137         node = ofw_bus_get_node(pci);
  138         if (OF_hasprop(node, "msi-map"))
  139                 return (generic_pcie_get_id(pci, child, type, id));
  140 
  141         bsf = pci_get_rid(child);
  142         *id = (pci_get_domain(child) << PCI_RID_DOMAIN_SHIFT) | bsf;
  143 
  144         return (0);
  145 }
  146 
  147 #ifdef THUNDERX_PASS_1_1_ERRATA
  148 static struct resource *
  149 thunder_pcie_fdt_alloc_resource(device_t dev, device_t child, int type, int *rid,
  150     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  151 {
  152 
  153         if ((int)ofw_bus_get_node(child) > 0)
  154                 return (pci_host_generic_alloc_resource(dev, child,
  155                     type, rid, start, end, count, flags));
  156 
  157         return (thunder_pcie_alloc_resource(dev, child,
  158             type, rid, start, end, count, flags));
  159 }
  160 #endif

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