proto_bus_pci.c

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    1 /*-
    2  * Copyright (c) 2014, 2015 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD$");
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/bus.h>
   32 #include <sys/conf.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <machine/bus.h>
   36 #include <sys/rman.h>
   37 #include <machine/resource.h>
   38 #include <sys/sbuf.h>
   39 
   40 #include <dev/pci/pcireg.h>
   41 #include <dev/pci/pcivar.h>
   42 
   43 #include <dev/proto/proto.h>
   44 
   45 static int proto_pci_probe(device_t dev);
   46 static int proto_pci_attach(device_t dev);
   47 
   48 static device_method_t proto_pci_methods[] = {
   49         /* Device interface */
   50         DEVMETHOD(device_probe,         proto_pci_probe),
   51         DEVMETHOD(device_attach,        proto_pci_attach),
   52         DEVMETHOD(device_detach,        proto_detach),
   53         DEVMETHOD_END
   54 };
   55 
   56 static driver_t proto_pci_driver = {
   57         proto_driver_name,
   58         proto_pci_methods,
   59         sizeof(struct proto_softc),
   60 };
   61 
   62 static char proto_pci_prefix[] = "pci";
   63 static char **proto_pci_devnames;
   64 
   65 static int
   66 proto_pci_probe(device_t dev)
   67 {
   68         struct sbuf *sb;
   69 
   70         if ((pci_read_config(dev, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE) != 0)
   71                 return (ENXIO);
   72 
   73         sb = sbuf_new_auto();
   74         sbuf_printf(sb, "%s%d:%d:%d:%d", proto_pci_prefix, pci_get_domain(dev),
   75             pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev));
   76         sbuf_finish(sb);
   77         device_set_desc_copy(dev, sbuf_data(sb));
   78         sbuf_delete(sb);
   79         return (proto_probe(dev, proto_pci_prefix, &proto_pci_devnames));
   80 }
   81 
   82 static int
   83 proto_pci_attach(device_t dev)
   84 {
   85         struct proto_softc *sc;
   86         struct resource *res;
   87         uint32_t val;
   88         int bar, rid, type;
   89 
   90         sc = device_get_softc(dev);
   91 
   92         proto_add_resource(sc, PROTO_RES_PCICFG, 0, NULL);
   93         proto_add_resource(sc, PROTO_RES_BUSDMA, 0, NULL);
   94 
   95         for (bar = 0; bar < PCIR_MAX_BAR_0; bar++) {
   96                 rid = PCIR_BAR(bar);
   97                 val = pci_read_config(dev, rid, 4);
   98                 type = (PCI_BAR_IO(val)) ? SYS_RES_IOPORT : SYS_RES_MEMORY;
   99                 res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
  100                 if (res == NULL)
  101                         continue;
  102                 proto_add_resource(sc, type, rid, res);
  103                 if (type == SYS_RES_IOPORT)
  104                         continue;
  105                 /* Skip over adjacent BAR for 64-bit memory BARs. */
  106                 if ((val & PCIM_BAR_MEM_TYPE) == PCIM_BAR_MEM_64)
  107                         bar++;
  108         }
  109 
  110         rid = 0;
  111         type = SYS_RES_IRQ;
  112         res = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE | RF_SHAREABLE);
  113         if (res != NULL)
  114                 proto_add_resource(sc, type, rid, res);
  115         return (proto_attach(dev));
  116 }
  117 
  118 DRIVER_MODULE(proto, pci, proto_pci_driver, NULL, NULL);

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FreeBSD/Linux Kernel Cross Reference sys/dev/proto/proto_bus_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/proto/proto_bus_pci.c