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     Error *err = NULL;
  74     ISADevice *isadev = ISA_DEVICE(dev);
  75     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
  76     IPMIInterface *ii = IPMI_INTERFACE(dev);
  77     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
  78
  79     if (!iib->bt.bmc) {
  80         error_setg(errp, "IPMI device requires a bmc attribute to be set");
  81         return;
  82     }
  83
  84     iib->uuid = ipmi_next_uuid();
  85
  86     iib->bt.bmc->intf = ii;
  87     iib->bt.opaque = iib;
  88
  89     iic->init(ii, 0, &err);
  90     if (err) {
  91         error_propagate(errp, err);
  92         return;
  93     }
  94
  95     if (iib->isairq > 0) {
  96         isa_init_irq(isadev, &iib->irq, iib->isairq);
  97         iib->bt.use_irq = 1;
  98         iib->bt.raise_irq = isa_ipmi_bt_raise_irq;
  99         iib->bt.lower_irq = isa_ipmi_bt_lower_irq;
 100     }
 101
 102     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
 103
 104     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
 105 }
 106
 107 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
 108     .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
 109     .version_id = 2,
 110     .minimum_version_id = 2,
 111     /*
 112      * Version 1 had messed up the array transfer, it's not even usable
 113      * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
 114      * the buffer length, so random things would happen.
 115      */
 116     .fields      = (VMStateField[]) {
 117         VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
 118         VMSTATE_END_OF_LIST()
 119     }
 120 };
 121
 122 static void isa_ipmi_bt_init(Object *obj)
 123 {
 124     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
 125
 126     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
 127
 128     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
 129 }
 130
 131 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
 132 {
 133     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
 134
 135     return &iib->bt;
 136 }
 137
 138 static Property ipmi_isa_properties[] = {
 139     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
 140     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
 141     DEFINE_PROP_END_OF_LIST(),
 142 };
 143
 144 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
 145 {
 146     DeviceClass *dc = DEVICE_CLASS(oc);
 147     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
 148
 149     dc->realize = isa_ipmi_bt_realize;
 150     device_class_set_props(dc, ipmi_isa_properties);
 151
 152     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
 153     ipmi_bt_class_init(iic);
 154     iic->get_fwinfo = isa_ipmi_bt_get_fwinfo;
 155 }
 156
 157 static const TypeInfo isa_ipmi_bt_info = {
 158     .name          = TYPE_ISA_IPMI_BT,
 159     .parent        = TYPE_ISA_DEVICE,
 160     .instance_size = sizeof(ISAIPMIBTDevice),
 161     .instance_init = isa_ipmi_bt_init,
 162     .class_init    = isa_ipmi_bt_class_init,
 163     .interfaces = (InterfaceInfo[]) {
 164         { TYPE_IPMI_INTERFACE },
 165         { }
 166     }
 167 };
 168
 169 static void ipmi_register_types(void)
 170 {
 171     type_register_static(&isa_ipmi_bt_info);
 172 }
 173
 174 type_init(ipmi_register_types)