LXR qemu/hw/acpi/ipmi.c

   1/*
   2 * IPMI ACPI firmware handling
   3 *
   4 * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
   5 *
   6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7 * See the COPYING file in the top-level directory.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "hw/ipmi/ipmi.h"
  12#include "hw/acpi/aml-build.h"
  13#include "hw/acpi/acpi.h"
  14#include "hw/acpi/ipmi.h"
  15
  16static Aml *aml_ipmi_crs(IPMIFwInfo *info, const char *resource)
  17{
  18    Aml *crs = aml_resource_template();
  19
  20    /*
  21     * The base address is fixed and cannot change.  That may be different
  22     * if someone does PCI, but we aren't there yet.
  23     */
  24    switch (info->memspace) {
  25    case IPMI_MEMSPACE_IO:
  26        aml_append(crs, aml_io(AML_DECODE16, info->base_address,
  27                               info->base_address + info->register_length - 1,
  28                               info->register_spacing, info->register_length));
  29        break;
  30    case IPMI_MEMSPACE_MEM32:
  31        aml_append(crs,
  32                   aml_dword_memory(AML_POS_DECODE,
  33                            AML_MIN_FIXED, AML_MAX_FIXED,
  34                            AML_NON_CACHEABLE, AML_READ_WRITE,
  35                            0xffffffff,
  36                            info->base_address,
  37                            info->base_address + info->register_length - 1,
  38                            info->register_spacing, info->register_length));
  39        break;
  40    case IPMI_MEMSPACE_MEM64:
  41        aml_append(crs,
  42                   aml_qword_memory(AML_POS_DECODE,
  43                            AML_MIN_FIXED, AML_MAX_FIXED,
  44                            AML_NON_CACHEABLE, AML_READ_WRITE,
  45                            0xffffffffffffffffULL,
  46                            info->base_address,
  47                            info->base_address + info->register_length - 1,
  48                            info->register_spacing, info->register_length));
  49        break;
  50    case IPMI_MEMSPACE_SMBUS:
  51        aml_append(crs, aml_i2c_serial_bus_device(info->base_address,
  52                                                  resource));
  53        break;
  54    default:
  55        abort();
  56    }
  57
  58    if (info->interrupt_number) {
  59        aml_append(crs, aml_irq_no_flags(info->interrupt_number));
  60    }
  61
  62    return crs;
  63}
  64
  65static Aml *aml_ipmi_device(IPMIFwInfo *info, const char *resource)
  66{
  67    Aml *dev;
  68    uint16_t version = ((info->ipmi_spec_major_revision << 8)
  69                        | (info->ipmi_spec_minor_revision << 4));
  70
  71    assert(info->ipmi_spec_minor_revision <= 15);
  72
  73    dev = aml_device("MI%d", info->uuid);
  74    aml_append(dev, aml_name_decl("_HID", aml_eisaid("IPI0001")));
  75    aml_append(dev, aml_name_decl("_STR", aml_string("ipmi_%s",
  76                                                     info->interface_name)));
  77    aml_append(dev, aml_name_decl("_UID", aml_int(info->uuid)));
  78    aml_append(dev, aml_name_decl("_CRS", aml_ipmi_crs(info, resource)));
  79    aml_append(dev, aml_name_decl("_IFT", aml_int(info->interface_type)));
  80    aml_append(dev, aml_name_decl("_SRV", aml_int(version)));
  81
  82    return dev;
  83}
  84
  85void build_acpi_ipmi_devices(Aml *scope, BusState *bus, const char *resource)
  86{
  87
  88    BusChild *kid;
  89
  90    QTAILQ_FOREACH(kid, &bus->children,  sibling) {
  91        IPMIInterface *ii;
  92        IPMIInterfaceClass *iic;
  93        IPMIFwInfo info;
  94        Object *obj = object_dynamic_cast(OBJECT(kid->child),
  95                                          TYPE_IPMI_INTERFACE);
  96
  97        if (!obj) {
  98            continue;
  99        }
 100
 101        ii = IPMI_INTERFACE(obj);
 102        iic = IPMI_INTERFACE_GET_CLASS(obj);
 103        memset(&info, 0, sizeof(info));
 104        iic->get_fwinfo(ii, &info);
 105        aml_append(scope, aml_ipmi_device(&info, resource));
 106    }
 107}
 108