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("$FreeBSD$");
   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/pci_host_generic_fdt.h>
   53 #include <dev/pci/pcib_private.h>
   54 
   55 #include "thunder_pcie_common.h"
   56 
   57 #include "pcib_if.h"
   58 
   59 #ifdef THUNDERX_PASS_1_1_ERRATA
   60 static struct resource * thunder_pcie_fdt_alloc_resource(device_t, device_t,
   61     int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
   62 #endif
   63 static int thunder_pcie_fdt_attach(device_t);
   64 static int thunder_pcie_fdt_probe(device_t);
   65 static int thunder_pcie_fdt_get_id(device_t, device_t, enum pci_id_type,
   66     uintptr_t *);
   67 
   68 static device_method_t thunder_pcie_fdt_methods[] = {
   69         /* Device interface */
   70         DEVMETHOD(device_probe,         thunder_pcie_fdt_probe),
   71         DEVMETHOD(device_attach,        thunder_pcie_fdt_attach),
   72 #ifdef THUNDERX_PASS_1_1_ERRATA
   73         DEVMETHOD(bus_alloc_resource,   thunder_pcie_fdt_alloc_resource),
   74 #endif
   75 
   76         /* pcib interface */
   77         DEVMETHOD(pcib_get_id,          thunder_pcie_fdt_get_id),
   78 
   79         /* End */
   80         DEVMETHOD_END
   81 };
   82 
   83 DEFINE_CLASS_1(pcib, thunder_pcie_fdt_driver, thunder_pcie_fdt_methods,
   84     sizeof(struct generic_pcie_fdt_softc), generic_pcie_fdt_driver);
   85 
   86 static devclass_t thunder_pcie_fdt_devclass;
   87 
   88 DRIVER_MODULE(thunder_pcib, simplebus, thunder_pcie_fdt_driver,
   89     thunder_pcie_fdt_devclass, 0, 0);
   90 DRIVER_MODULE(thunder_pcib, ofwbus, thunder_pcie_fdt_driver,
   91     thunder_pcie_fdt_devclass, 0, 0);
   92 
   93 
   94 static int
   95 thunder_pcie_fdt_probe(device_t dev)
   96 {
   97 
   98         /* Check if we're running on Cavium ThunderX */
   99         if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
  100             CPU_IMPL_CAVIUM, CPU_PART_THUNDERX, 0, 0))
  101                 return (ENXIO);
  102 
  103         if (!ofw_bus_status_okay(dev))
  104                 return (ENXIO);
  105 
  106         if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic") ||
  107             ofw_bus_is_compatible(dev, "cavium,thunder-pcie") ||
  108             ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-ecam")) {
  109                 device_set_desc(dev, "Cavium Integrated PCI/PCI-E Controller");
  110                 return (BUS_PROBE_DEFAULT);
  111         }
  112 
  113         return (ENXIO);
  114 }
  115 
  116 static int
  117 thunder_pcie_fdt_attach(device_t dev)
  118 {
  119         struct generic_pcie_fdt_softc *sc;
  120 
  121         sc = device_get_softc(dev);
  122         thunder_pcie_identify_ecam(dev, &sc->base.ecam);
  123         sc->base.coherent = 1;
  124 
  125         return (pci_host_generic_attach(dev));
  126 }
  127 
  128 static int
  129 thunder_pcie_fdt_get_id(device_t pci, device_t child, enum pci_id_type type,
  130     uintptr_t *id)
  131 {
  132         phandle_t node;
  133         int bsf;
  134 
  135         if (type != PCI_ID_MSI)
  136                 return (pcib_get_id(pci, child, type, id));
  137 
  138         node = ofw_bus_get_node(pci);
  139         if (OF_hasprop(node, "msi-map"))
  140                 return (generic_pcie_get_id(pci, child, type, id));
  141 
  142         bsf = pci_get_rid(child);
  143         *id = (pci_get_domain(child) << PCI_RID_DOMAIN_SHIFT) | bsf;
  144 
  145         return (0);
  146 }
  147 
  148 #ifdef THUNDERX_PASS_1_1_ERRATA
  149 static struct resource *
  150 thunder_pcie_fdt_alloc_resource(device_t dev, device_t child, int type, int *rid,
  151     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  152 {
  153 
  154         if ((int)ofw_bus_get_node(child) > 0)
  155                 return (pci_host_generic_alloc_resource(dev, child,
  156                     type, rid, start, end, count, flags));
  157 
  158         return (thunder_pcie_alloc_resource(dev, child,
  159             type, rid, start, end, count, flags));
  160 }
  161 #endif

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