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/dev/ipmi/ipmi_isa.c

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    1 /*-
    2  * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
    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 AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/8.4/sys/dev/ipmi/ipmi_isa.c 171464 2007-07-16 17:03:48Z ambrisko $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 #include <sys/condvar.h>
   34 #include <sys/eventhandler.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/rman.h>
   38 #include <sys/selinfo.h>
   39 
   40 #include <machine/pci_cfgreg.h>
   41 #include <dev/pci/pcireg.h>
   42 
   43 #include <isa/isavar.h>
   44 
   45 #ifdef LOCAL_MODULE
   46 #include <ipmi.h>
   47 #include <ipmivars.h>
   48 #else
   49 #include <sys/ipmi.h>
   50 #include <dev/ipmi/ipmivars.h>
   51 #endif
   52 
   53 static void
   54 ipmi_isa_identify(driver_t *driver, device_t parent)
   55 {
   56         struct ipmi_get_info info;
   57         uint32_t devid;
   58 
   59         if (ipmi_smbios_identify(&info) && info.iface_type != SSIF_MODE &&
   60             device_find_child(parent, "ipmi", -1) == NULL) {
   61                 /*
   62                  * XXX: Hack alert.  On some broken systems, the IPMI
   63                  * interface is described via SMBIOS, but the actual
   64                  * IO resource is in a PCI device BAR, so we have to let
   65                  * the PCI device attach ipmi instead.  In that case don't
   66                  * create an isa ipmi device.  For now we hardcode the list
   67                  * of bus, device, function tuples.
   68                  */
   69                 devid = pci_cfgregread(0, 4, 2, PCIR_DEVVENDOR, 4);
   70                 if (devid != 0xffffffff &&
   71                     ipmi_pci_match(devid & 0xffff, devid >> 16) != NULL)
   72                         return;
   73                 BUS_ADD_CHILD(parent, 0, "ipmi", -1);
   74         }
   75 }
   76 
   77 static int
   78 ipmi_isa_probe(device_t dev)
   79 {
   80 
   81         /* Skip any PNP devices. */
   82         if (isa_get_logicalid(dev) != 0)
   83                 return (ENXIO);
   84 
   85         device_set_desc(dev, "IPMI System Interface");
   86         return (BUS_PROBE_DEFAULT);
   87 }
   88 
   89 static int
   90 ipmi_hint_identify(device_t dev, struct ipmi_get_info *info)
   91 {
   92         const char *mode, *name;
   93         int i, unit, val;
   94 
   95         /* We require at least a "mode" hint. */
   96         name = device_get_name(dev);
   97         unit = device_get_unit(dev);
   98         if (resource_string_value(name, unit, "mode", &mode) != 0)
   99                 return (0);
  100 
  101         /* Set the mode and default I/O resources for each mode. */
  102         bzero(info, sizeof(struct ipmi_get_info));
  103         if (strcasecmp(mode, "KCS") == 0) {
  104                 info->iface_type = KCS_MODE;
  105                 info->address = 0xca2;
  106                 info->io_mode = 1;
  107                 info->offset = 1;
  108         } else if (strcasecmp(mode, "SMIC") == 0) {
  109                 info->iface_type = SMIC_MODE;
  110                 info->address = 0xca9;
  111                 info->io_mode = 1;
  112                 info->offset = 1;
  113         } else if (strcasecmp(mode, "BT") == 0) {
  114                 info->iface_type = BT_MODE;
  115                 info->address = 0xe4;
  116                 info->io_mode = 1;
  117                 info->offset = 1;
  118         } else {
  119                 device_printf(dev, "Invalid mode %s\n", mode);
  120                 return (0);
  121         }
  122 
  123         /*
  124          * Kill any resources that isahint.c might have setup for us
  125          * since it will conflict with how we do resources.
  126          */
  127         for (i = 0; i < 2; i++) {
  128                 bus_delete_resource(dev, SYS_RES_MEMORY, i);
  129                 bus_delete_resource(dev, SYS_RES_IOPORT, i);
  130         }
  131 
  132         /* Allow the I/O address to be overriden via hints. */
  133         if (resource_int_value(name, unit, "port", &val) == 0 && val != 0) {
  134                 info->address = val;
  135                 info->io_mode = 1;
  136         } else if (resource_int_value(name, unit, "maddr", &val) == 0 &&
  137             val != 0) {
  138                 info->address = val;
  139                 info->io_mode = 0;
  140         }
  141 
  142         /* Allow the spacing to be overriden. */
  143         if (resource_int_value(name, unit, "spacing", &val) == 0) {
  144                 switch (val) {
  145                 case 8:
  146                         info->offset = 1;
  147                         break;
  148                 case 16:
  149                         info->offset = 2;
  150                         break;
  151                 case 32:
  152                         info->offset = 4;
  153                         break;
  154                 default:
  155                         device_printf(dev, "Invalid register spacing\n");
  156                         return (0);
  157                 }
  158         }
  159         return (1);
  160 }
  161 
  162 static int
  163 ipmi_isa_attach(device_t dev)
  164 {
  165         struct ipmi_softc *sc = device_get_softc(dev);
  166         struct ipmi_get_info info;
  167         const char *mode;
  168         int count, error, i, type;
  169 
  170         /*
  171          * Pull info out of the SMBIOS table.  If that doesn't work, use
  172          * hints to enumerate a device.
  173          */
  174         if (!ipmi_smbios_identify(&info) &&
  175             !ipmi_hint_identify(dev, &info))
  176                 return (ENXIO);
  177 
  178         /*
  179          * Give other drivers precedence.  Unfortunately, this doesn't
  180          * work if we have an SMBIOS table that duplicates a PCI device
  181          * that's later on the bus than the PCI-ISA bridge.
  182          */
  183         if (ipmi_attached)
  184                 return (EBUSY);
  185 
  186         switch (info.iface_type) {
  187         case KCS_MODE:
  188                 count = 2;
  189                 mode = "KCS";
  190                 break;
  191         case SMIC_MODE:
  192                 count = 3;
  193                 mode = "SMIC";
  194                 break;
  195         case BT_MODE:
  196                 device_printf(dev, "BT mode is unsupported\n");
  197                 return (ENXIO);
  198         default:
  199                 return (ENXIO);
  200         }
  201         error = 0;
  202         sc->ipmi_dev = dev;
  203 
  204         device_printf(dev, "%s mode found at %s 0x%jx alignment 0x%x on %s\n",
  205             mode, info.io_mode ? "io" : "mem",
  206             (uintmax_t)info.address, info.offset,
  207             device_get_name(device_get_parent(dev)));
  208         if (info.io_mode)
  209                 type = SYS_RES_IOPORT;
  210         else
  211                 type = SYS_RES_MEMORY;
  212 
  213         sc->ipmi_io_type = type;
  214         sc->ipmi_io_spacing = info.offset;
  215         if (info.offset == 1) {
  216                 sc->ipmi_io_rid = 0;
  217                 sc->ipmi_io_res[0] = bus_alloc_resource(dev, type,
  218                     &sc->ipmi_io_rid, info.address, info.address + count - 1,
  219                     count, RF_ACTIVE);
  220                 if (sc->ipmi_io_res[0] == NULL) {
  221                         device_printf(dev, "couldn't configure I/O resource\n");
  222                         return (ENXIO);
  223                 }
  224         } else {
  225                 for (i = 0; i < count; i++) {
  226                         sc->ipmi_io_rid = i;
  227                         sc->ipmi_io_res[i] = bus_alloc_resource(dev, type,
  228                             &sc->ipmi_io_rid, info.address + i * info.offset,
  229                             info.address + i * info.offset, 1, RF_ACTIVE);
  230                         if (sc->ipmi_io_res[i] == NULL) {
  231                                 device_printf(dev,
  232                                     "couldn't configure I/O resource\n");
  233                                 error = ENXIO;
  234                                 sc->ipmi_io_rid = 0;
  235                                 goto bad;
  236                         }
  237                 }
  238                 sc->ipmi_io_rid = 0;
  239         }
  240 
  241         if (info.irq != 0) {
  242                 sc->ipmi_irq_rid = 0;
  243                 sc->ipmi_irq_res = bus_alloc_resource(dev, SYS_RES_IRQ,
  244                     &sc->ipmi_irq_rid, info.irq, info.irq, 1,
  245                     RF_SHAREABLE | RF_ACTIVE);
  246         }
  247 
  248         switch (info.iface_type) {
  249         case KCS_MODE:
  250                 error = ipmi_kcs_attach(sc);
  251                 if (error)
  252                         goto bad;
  253                 break;
  254         case SMIC_MODE:
  255                 error = ipmi_smic_attach(sc);
  256                 if (error)
  257                         goto bad;
  258                 break;
  259         }
  260 
  261         error = ipmi_attach(dev);
  262         if (error)
  263                 goto bad;
  264 
  265         return (0);
  266 bad:
  267         ipmi_release_resources(dev);
  268         return (error);
  269 }
  270 
  271 static device_method_t ipmi_methods[] = {
  272         /* Device interface */
  273         DEVMETHOD(device_identify,      ipmi_isa_identify),
  274         DEVMETHOD(device_probe,         ipmi_isa_probe),
  275         DEVMETHOD(device_attach,        ipmi_isa_attach),
  276         DEVMETHOD(device_detach,        ipmi_detach),
  277         { 0, 0 }
  278 };
  279 
  280 static driver_t ipmi_isa_driver = {
  281         "ipmi",
  282         ipmi_methods,
  283         sizeof(struct ipmi_softc),
  284 };
  285 
  286 DRIVER_MODULE(ipmi_isa, isa, ipmi_isa_driver, ipmi_devclass, 0, 0);

Cache object: df16ee68792a7e6f6210507207b11601


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