LXR qemu/hw/ipmi/isa_ipmi

   1/*
   2 * QEMU ISA IPMI BT emulation
   3 *
   4 * Copyright (c) 2015 Corey Minyard, MontaVista Software, LLC
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#include "qemu/osdep.h"
  26#include "qemu/module.h"
  27#include "qapi/error.h"
  28#include "hw/irq.h"
  29#include "hw/ipmi/ipmi_bt.h"
  30#include "hw/isa/isa.h"
  31#include "hw/qdev-properties.h"
  32#include "migration/vmstate.h"
  33#include "qom/object.h"
  34
  35#define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
  36OBJECT_DECLARE_SIMPLE_TYPE(ISAIPMIBTDevice, ISA_IPMI_BT)
  37
  38struct ISAIPMIBTDevice {
  39    ISADevice dev;
  40    int32_t isairq;
  41    qemu_irq irq;
  42    IPMIBT bt;
  43    uint32_t uuid;
  44};
  45
  46static void isa_ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
  47{
  48    ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
  49
  50    ipmi_bt_get_fwinfo(&iib->bt, info);
  51    info->interrupt_number = iib->isairq;
  52    info->i2c_slave_address = iib->bt.bmc->slave_addr;
  53    info->uuid = iib->uuid;
  54}
  55
  56static void isa_ipmi_bt_raise_irq(IPMIBT *ib)
  57{
  58    ISAIPMIBTDevice *iib = ib->opaque;
  59
  60    qemu_irq_raise(iib->irq);
  61}
  62
  63static void isa_ipmi_bt_lower_irq(IPMIBT *ib)
  64{
  65    ISAIPMIBTDevice *iib = ib->opaque;
  66
  67    qemu_irq_lower(iib->irq);
  68}
  69
  70static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
  71{
  72    Error *err = NULL;
  73    ISADevice *isadev = ISA_DEVICE(dev);
  74    ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
  75    IPMIInterface *ii = IPMI_INTERFACE(dev);
  76    IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
  77
  78    if (!iib->bt.bmc) {
  79        error_setg(errp, "IPMI device requires a bmc attribute to be set");
  80        return;
  81    }
  82
  83    iib->uuid = ipmi_next_uuid();
  84
  85    iib->bt.bmc->intf = ii;
  86    iib->bt.opaque = iib;
  87
  88    iic->init(ii, 0, &err);
  89    if (err) {
  90        error_propagate(errp, err);
  91        return;
  92    }
  93
  94    if (iib->isairq > 0) {
  95        isa_init_irq(isadev, &iib->irq, iib->isairq);
  96        iib->bt.use_irq = 1;
  97        iib->bt.raise_irq = isa_ipmi_bt_raise_irq;
  98        iib->bt.lower_irq = isa_ipmi_bt_lower_irq;
  99    }
 100
 101    qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
 102
 103    isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
 104}
 105
 106static const VMStateDescription vmstate_ISAIPMIBTDevice = {
 107    .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
 108    .version_id = 2,
 109    .minimum_version_id = 2,
 110    /*
 111     * Version 1 had messed up the array transfer, it's not even usable
 112     * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
 113     * the buffer length, so random things would happen.
 114     */
 115    .fields      = (VMStateField[]) {
 116        VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
 117        VMSTATE_END_OF_LIST()
 118    }
 119};
 120
 121static void isa_ipmi_bt_init(Object *obj)
 122{
 123    ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
 124
 125    ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
 126
 127    vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
 128}
 129
 130static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
 131{
 132    ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
 133
 134    return &iib->bt;
 135}
 136
 137static Property ipmi_isa_properties[] = {
 138    DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
 139    DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
 140    DEFINE_PROP_END_OF_LIST(),
 141};
 142
 143static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
 144{
 145    DeviceClass *dc = DEVICE_CLASS(oc);
 146    IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
 147
 148    dc->realize = isa_ipmi_bt_realize;
 149    device_class_set_props(dc, ipmi_isa_properties);
 150
 151    iic->get_backend_data = isa_ipmi_bt_get_backend_data;
 152    ipmi_bt_class_init(iic);
 153    iic->get_fwinfo = isa_ipmi_bt_get_fwinfo;
 154}
 155
 156static const TypeInfo isa_ipmi_bt_info = {
 157    .name          = TYPE_ISA_IPMI_BT,
 158    .parent        = TYPE_ISA_DEVICE,
 159    .instance_size = sizeof(ISAIPMIBTDevice),
 160    .instance_init = isa_ipmi_bt_init,
 161    .class_init    = isa_ipmi_bt_class_init,
 162    .interfaces = (InterfaceInfo[]) {
 163        { TYPE_IPMI_INTERFACE },
 164        { }
 165    }
 166};
 167
 168static void ipmi_register_types(void)
 169{
 170    type_register_static(&isa_ipmi_bt_info);
 171}
 172
 173type_init(ipmi_register_types)
 174