hw/ipmi/isa_ipmi_bt.c

   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/log.h"
  27 #include "qemu/module.h"
  28 #include "qapi/error.h"
  29 #include "hw/irq.h"
  30 #include "hw/ipmi/ipmi_bt.h"
  31 #include "hw/isa/isa.h"
  32 #include "hw/qdev-properties.h"
  33 #include "migration/vmstate.h"
  34 #include "qom/object.h"
  35
  36 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
  37 typedef struct ISAIPMIBTDevice ISAIPMIBTDevice;
  38 DECLARE_INSTANCE_CHECKER(ISAIPMIBTDevice, ISA_IPMI_BT,
  39                          TYPE_ISA_IPMI_BT)
  40
  41 struct ISAIPMIBTDevice {
  42     ISADevice dev;
  43     int32_t isairq;
  44     qemu_irq irq;
  45     IPMIBT bt;
  46     uint32_t uuid;
  47 };
  48
  49 static void isa_ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
  50 {
  51     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
  52
  53     ipmi_bt_get_fwinfo(&iib->bt, info);
  54     info->interrupt_number = iib->isairq;
  55     info->i2c_slave_address = iib->bt.bmc->slave_addr;
  56     info->uuid = iib->uuid;
  57 }
  58
  59 static void isa_ipmi_bt_raise_irq(IPMIBT *ib)
  60 {
  61     ISAIPMIBTDevice *iib = ib->opaque;
  62
  63     qemu_irq_raise(iib->irq);
  64 }
  65
  66 static void isa_ipmi_bt_lower_irq(IPMIBT *ib)
  67 {
  68     ISAIPMIBTDevice *iib = ib->opaque;
  69
  70     qemu_irq_lower(iib->irq);
  71 }
  72
  73 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
  74 {
  75     Error *err = NULL;
  76     ISADevice *isadev = ISA_DEVICE(dev);
  77     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
  78     IPMIInterface *ii = IPMI_INTERFACE(dev);
  79     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
  80
  81     if (!iib->bt.bmc) {
  82         error_setg(errp, "IPMI device requires a bmc attribute to be set");
  83         return;
  84     }
  85
  86     iib->uuid = ipmi_next_uuid();
  87
  88     iib->bt.bmc->intf = ii;
  89     iib->bt.opaque = iib;
  90
  91     iic->init(ii, 0, &err);
  92     if (err) {
  93         error_propagate(errp, err);
  94         return;
  95     }
  96
  97     if (iib->isairq > 0) {
  98         isa_init_irq(isadev, &iib->irq, iib->isairq);
  99         iib->bt.use_irq = 1;
 100         iib->bt.raise_irq = isa_ipmi_bt_raise_irq;
 101         iib->bt.lower_irq = isa_ipmi_bt_lower_irq;
 102     }
 103
 104     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
 105
 106     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
 107 }
 108
 109 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
 110     .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
 111     .version_id = 2,
 112     .minimum_version_id = 2,
 113     /*
 114      * Version 1 had messed up the array transfer, it's not even usable
 115      * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
 116      * the buffer length, so random things would happen.
 117      */
 118     .fields      = (VMStateField[]) {
 119         VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
 120         VMSTATE_END_OF_LIST()
 121     }
 122 };
 123
 124 static void isa_ipmi_bt_init(Object *obj)
 125 {
 126     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
 127
 128     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
 129
 130     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
 131 }
 132
 133 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
 134 {
 135     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
 136
 137     return &iib->bt;
 138 }
 139
 140 static Property ipmi_isa_properties[] = {
 141     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
 142     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
 143     DEFINE_PROP_END_OF_LIST(),
 144 };
 145
 146 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
 147 {
 148     DeviceClass *dc = DEVICE_CLASS(oc);
 149     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
 150
 151     dc->realize = isa_ipmi_bt_realize;
 152     device_class_set_props(dc, ipmi_isa_properties);
 153
 154     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
 155     ipmi_bt_class_init(iic);
 156     iic->get_fwinfo = isa_ipmi_bt_get_fwinfo;
 157 }
 158
 159 static const TypeInfo isa_ipmi_bt_info = {
 160     .name          = TYPE_ISA_IPMI_BT,
 161     .parent        = TYPE_ISA_DEVICE,
 162     .instance_size = sizeof(ISAIPMIBTDevice),
 163     .instance_init = isa_ipmi_bt_init,
 164     .class_init    = isa_ipmi_bt_class_init,
 165     .interfaces = (InterfaceInfo[]) {
 166         { TYPE_IPMI_INTERFACE },
 167         { }
 168     }
 169 };
 170
 171 static void ipmi_register_types(void)
 172 {
 173     type_register_static(&isa_ipmi_bt_info);
 174 }
 175
 176 type_init(ipmi_register_types)