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 #include "hw/acpi/ipmi.h"
35
36 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
37 OBJECT_DECLARE_SIMPLE_TYPE(ISAIPMIBTDevice, ISA_IPMI_BT)
38
39 struct ISAIPMIBTDevice {
40 ISADevice dev;
41 int32_t isairq;
42 qemu_irq irq;
43 IPMIBT bt;
44 uint32_t uuid;
45 };
46
isa_ipmi_bt_get_fwinfo(struct IPMIInterface * ii,IPMIFwInfo * info)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->irq_source = IPMI_ISA_IRQ;
53 info->interrupt_number = iib->isairq;
54 info->i2c_slave_address = iib->bt.bmc->slave_addr;
55 info->uuid = iib->uuid;
56 }
57
isa_ipmi_bt_raise_irq(IPMIBT * ib)58 static void isa_ipmi_bt_raise_irq(IPMIBT *ib)
59 {
60 ISAIPMIBTDevice *iib = ib->opaque;
61
62 qemu_irq_raise(iib->irq);
63 }
64
isa_ipmi_bt_lower_irq(IPMIBT * ib)65 static void isa_ipmi_bt_lower_irq(IPMIBT *ib)
66 {
67 ISAIPMIBTDevice *iib = ib->opaque;
68
69 qemu_irq_lower(iib->irq);
70 }
71
72 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
73 .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
74 .version_id = 2,
75 .minimum_version_id = 2,
76 /*
77 * Version 1 had messed up the array transfer, it's not even usable
78 * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
79 * the buffer length, so random things would happen.
80 */
81 .fields = (const VMStateField[]) {
82 VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
83 VMSTATE_END_OF_LIST()
84 }
85 };
86
isa_ipmi_bt_realize(DeviceState * dev,Error ** errp)87 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
88 {
89 Error *err = NULL;
90 ISADevice *isadev = ISA_DEVICE(dev);
91 ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
92 IPMIInterface *ii = IPMI_INTERFACE(dev);
93 IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
94
95 if (!iib->bt.bmc) {
96 error_setg(errp, "IPMI device requires a bmc attribute to be set");
97 return;
98 }
99
100 iib->uuid = ipmi_next_uuid();
101
102 iib->bt.bmc->intf = ii;
103 iib->bt.opaque = iib;
104
105 iic->init(ii, 0, &err);
106 if (err) {
107 error_propagate(errp, err);
108 return;
109 }
110
111 if (iib->isairq > 0) {
112 iib->irq = isa_get_irq(isadev, iib->isairq);
113 iib->bt.use_irq = 1;
114 iib->bt.raise_irq = isa_ipmi_bt_raise_irq;
115 iib->bt.lower_irq = isa_ipmi_bt_lower_irq;
116 }
117
118 qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
119
120 isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
121 }
122
isa_ipmi_bt_init(Object * obj)123 static void isa_ipmi_bt_init(Object *obj)
124 {
125 ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
126
127 ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
128 }
129
isa_ipmi_bt_get_backend_data(IPMIInterface * ii)130 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
131 {
132 ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
133
134 return &iib->bt;
135 }
136
137 static const Property ipmi_isa_properties[] = {
138 DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base, 0xe4),
139 DEFINE_PROP_INT32("irq", ISAIPMIBTDevice, isairq, 5),
140 };
141
isa_ipmi_bt_class_init(ObjectClass * oc,const void * data)142 static void isa_ipmi_bt_class_init(ObjectClass *oc, const void *data)
143 {
144 DeviceClass *dc = DEVICE_CLASS(oc);
145 IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
146 AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(oc);
147
148 dc->realize = isa_ipmi_bt_realize;
149 dc->vmsd = &vmstate_ISAIPMIBTDevice;
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 adevc->build_dev_aml = build_ipmi_dev_aml;
156 }
157
158 static const TypeInfo isa_ipmi_bt_info = {
159 .name = TYPE_ISA_IPMI_BT,
160 .parent = TYPE_ISA_DEVICE,
161 .instance_size = sizeof(ISAIPMIBTDevice),
162 .instance_init = isa_ipmi_bt_init,
163 .class_init = isa_ipmi_bt_class_init,
164 .interfaces = (const InterfaceInfo[]) {
165 { TYPE_IPMI_INTERFACE },
166 { TYPE_ACPI_DEV_AML_IF },
167 { }
168 }
169 };
170
ipmi_register_types(void)171 static void ipmi_register_types(void)
172 {
173 type_register_static(&isa_ipmi_bt_info);
174 }
175
176 type_init(ipmi_register_types)
177