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) 172