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