FreeBSD/Linux Kernel Cross Reference
sys/dev/ipmi/ipmi_acpi.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/condvar.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    #include <sys/selinfo.h>
    
    #include <contrib/dev/acpica/include/acpi.h>
    
    #include <dev/acpica/acpivar.h>
    
    /* Hooks for the ACPI CA debugging infrastructure */
    #define _COMPONENT      ACPI_BUTTON
    ACPI_MODULE_NAME("IPMI")
    
    #ifdef LOCAL_MODULE
    #include <ipmi.h>
    #include <ipmivars.h>
    #else
    #include <sys/ipmi.h>
    #include <dev/ipmi/ipmivars.h>
    #endif
    
    static int ipmi_acpi_probe(device_t);
    static int ipmi_acpi_attach(device_t);
    
    int
    ipmi_acpi_probe(device_t dev)
    {
            static char *ipmi_ids[] = {"IPI0001", NULL};
            int rv;
    
            if (ipmi_attached)
                    return (EBUSY);
    
            if (acpi_disabled("ipmi"))
                    return (ENXIO);
            rv = ACPI_ID_PROBE(device_get_parent(dev), dev, ipmi_ids, NULL);
            if (rv <= 0)
                    device_set_desc(dev, "IPMI System Interface");
    
            return (rv);
    }
    
    static int
    ipmi_acpi_attach(device_t dev)
    {
            ACPI_HANDLE devh;
            const char *mode;
            struct ipmi_get_info info;
            struct ipmi_softc *sc = device_get_softc(dev);
            int count, error, flags, i, type;
            int interface_type = 0, interface_version = 0;
    
            error = 0;
            devh = acpi_get_handle(dev);
            if (ACPI_FAILURE(acpi_GetInteger(devh, "_IFT", &interface_type)))
                    return (ENXIO);
    
            if (ACPI_FAILURE(acpi_GetInteger(devh, "_SRV", &interface_version)))
                    return (ENXIO);
    
            switch (interface_type) {
            case KCS_MODE:
                    count = 2;
                    mode = "KCS";
                   break;
           case SMIC_MODE:
                   count = 3;
                   mode = "SMIC";
                   break;
           case BT_MODE:
                   device_printf(dev, "BT interface not supported\n");
                   return (ENXIO);
           case SSIF_MODE:
                   if (ACPI_FAILURE(acpi_GetInteger(devh, "_ADR", &flags)))
                           return (ENXIO);
                   info.address = flags;
                   device_printf(dev, "SSIF interface not supported on ACPI\n");
                   return (0);
           default:
                   return (ENXIO);
           }
   
           if (bus_get_resource(dev, SYS_RES_IOPORT, 0, NULL, NULL) == 0)
                   type = SYS_RES_IOPORT;
           else if (bus_get_resource(dev, SYS_RES_MEMORY, 0, NULL, NULL) == 0)
                   type = SYS_RES_MEMORY;
           else {
                   device_printf(dev, "unknown resource type\n");
                   return (ENXIO);
           }
   
           sc->ipmi_io_rid = 0;
           sc->ipmi_io_res[0] = bus_alloc_resource_any(dev, type,
               &sc->ipmi_io_rid, RF_ACTIVE);
           sc->ipmi_io_type = type;
           sc->ipmi_io_spacing = 1;
           if (sc->ipmi_io_res[0] == NULL) {
                   device_printf(dev, "couldn't configure I/O resource\n");
                   return (ENXIO);
           }
   
           /* If we have multiple resources, allocate up to MAX_RES. */
           for (i = 1; i < MAX_RES; i++) {
                   sc->ipmi_io_rid = i;
                   sc->ipmi_io_res[i] = bus_alloc_resource_any(dev, type,
                       &sc->ipmi_io_rid, RF_ACTIVE);
                   if (sc->ipmi_io_res[i] == NULL)
                           break;
           }
           sc->ipmi_io_rid = 0;
   
           /* If we have multiple resources, make sure we have enough of them. */
           if (sc->ipmi_io_res[1] != NULL && sc->ipmi_io_res[count - 1] == NULL) {
                   device_printf(dev, "too few I/O resources\n");
                   error = ENXIO;
                   goto bad;
           }
   
           device_printf(dev, "%s mode found at %s 0x%jx on %s\n",
               mode, type == SYS_RES_IOPORT ? "io" : "mem",
               (uintmax_t)rman_get_start(sc->ipmi_io_res[0]),
               device_get_name(device_get_parent(dev)));
   
           sc->ipmi_dev = dev;
   
           /*
            * Setup an interrupt if we have an interrupt resource.  We
            * don't support GPE interrupts via _GPE yet.
            */
           sc->ipmi_irq_rid = 0;
           sc->ipmi_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
               &sc->ipmi_irq_rid, RF_SHAREABLE | RF_ACTIVE);
   
           /* Warn if _GPE exists. */
           if (ACPI_SUCCESS(AcpiEvaluateObject(devh, "_GPE", NULL, NULL)))
                   device_printf(dev, "_GPE support not implemented\n");
   
           /*
            * We assume an alignment of 1 byte as currently the IPMI spec
            * doesn't provide any way to determine the alignment via ACPI.
            */
           switch (interface_type) {
           case KCS_MODE:
                   error = ipmi_kcs_attach(sc);
                   if (error)
                           goto bad;
                   break;
           case SMIC_MODE:
                   error = ipmi_smic_attach(sc);
                   if (error)
                           goto bad;
                   break;
           }
           error = ipmi_attach(dev);
           if (error)
                   goto bad;
   
           return (0);
   bad:
           ipmi_release_resources(dev);
           return (error);
   }
   
   static device_method_t ipmi_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,         ipmi_acpi_probe),
           DEVMETHOD(device_attach,        ipmi_acpi_attach),
           DEVMETHOD(device_detach,        ipmi_detach),
           { 0, 0 }
   };
   
   static driver_t ipmi_acpi_driver = {
           "ipmi",
           ipmi_methods,
           sizeof(struct ipmi_softc),
   };
   
   DRIVER_MODULE(ipmi_acpi, acpi, ipmi_acpi_driver, 0, 0);
   MODULE_DEPEND(ipmi_acpi, acpi, 1, 1, 1);

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