1 /*
2 * QEMU PCI IPMI BT emulation
3 *
4 * Copyright (c) 2017 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 #include "qemu/osdep.h"
25 #include "migration/vmstate.h"
26 #include "qapi/error.h"
27 #include "hw/ipmi/ipmi_bt.h"
28 #include "hw/pci/pci_device.h"
29 #include "qom/object.h"
30
31 #define TYPE_PCI_IPMI_BT "pci-ipmi-bt"
32 OBJECT_DECLARE_SIMPLE_TYPE(PCIIPMIBTDevice, PCI_IPMI_BT)
33
34 struct PCIIPMIBTDevice {
35 PCIDevice dev;
36 IPMIBT bt;
37 bool irq_enabled;
38 uint32_t uuid;
39 };
40
pci_ipmi_bt_get_fwinfo(struct IPMIInterface * ii,IPMIFwInfo * info)41 static void pci_ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
42 {
43 PCIIPMIBTDevice *pib = PCI_IPMI_BT(ii);
44
45 ipmi_bt_get_fwinfo(&pib->bt, info);
46 info->irq_source = IPMI_PCI_IRQ;
47 info->interrupt_number = pci_intx(&pib->dev);
48 info->i2c_slave_address = pib->bt.bmc->slave_addr;
49 info->uuid = pib->uuid;
50 }
51
pci_ipmi_raise_irq(IPMIBT * ib)52 static void pci_ipmi_raise_irq(IPMIBT *ib)
53 {
54 PCIIPMIBTDevice *pib = ib->opaque;
55
56 pci_set_irq(&pib->dev, true);
57 }
58
pci_ipmi_lower_irq(IPMIBT * ib)59 static void pci_ipmi_lower_irq(IPMIBT *ib)
60 {
61 PCIIPMIBTDevice *pib = ib->opaque;
62
63 pci_set_irq(&pib->dev, false);
64 }
65
pci_ipmi_bt_realize(PCIDevice * pd,Error ** errp)66 static void pci_ipmi_bt_realize(PCIDevice *pd, Error **errp)
67 {
68 Error *err = NULL;
69 PCIIPMIBTDevice *pib = PCI_IPMI_BT(pd);
70 IPMIInterface *ii = IPMI_INTERFACE(pd);
71 IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
72
73 if (!pib->bt.bmc) {
74 error_setg(errp, "IPMI device requires a bmc attribute to be set");
75 return;
76 }
77
78 pib->uuid = ipmi_next_uuid();
79
80 pib->bt.bmc->intf = ii;
81 pib->bt.opaque = pib;
82
83 pci_config_set_prog_interface(pd->config, 0x02); /* BT */
84 pci_config_set_interrupt_pin(pd->config, 0x01);
85 pib->bt.use_irq = 1;
86 pib->bt.raise_irq = pci_ipmi_raise_irq;
87 pib->bt.lower_irq = pci_ipmi_lower_irq;
88
89 iic->init(ii, 8, &err);
90 if (err) {
91 error_propagate(errp, err);
92 return;
93 }
94 pci_register_bar(pd, 0, PCI_BASE_ADDRESS_SPACE_IO, &pib->bt.io);
95 }
96
97 const VMStateDescription vmstate_PCIIPMIBTDevice = {
98 .name = TYPE_IPMI_INTERFACE_PREFIX "pci-bt",
99 .version_id = 1,
100 .minimum_version_id = 1,
101 .fields = (const VMStateField[]) {
102 VMSTATE_PCI_DEVICE(dev, PCIIPMIBTDevice),
103 VMSTATE_STRUCT(bt, PCIIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
104 VMSTATE_END_OF_LIST()
105 }
106 };
107
pci_ipmi_bt_instance_init(Object * obj)108 static void pci_ipmi_bt_instance_init(Object *obj)
109 {
110 PCIIPMIBTDevice *pib = PCI_IPMI_BT(obj);
111
112 ipmi_bmc_find_and_link(obj, (Object **) &pib->bt.bmc);
113 }
114
pci_ipmi_bt_get_backend_data(IPMIInterface * ii)115 static void *pci_ipmi_bt_get_backend_data(IPMIInterface *ii)
116 {
117 PCIIPMIBTDevice *pib = PCI_IPMI_BT(ii);
118
119 return &pib->bt;
120 }
121
pci_ipmi_bt_class_init(ObjectClass * oc,const void * data)122 static void pci_ipmi_bt_class_init(ObjectClass *oc, const void *data)
123 {
124 DeviceClass *dc = DEVICE_CLASS(oc);
125 PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
126 IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
127
128 pdc->vendor_id = PCI_VENDOR_ID_QEMU;
129 pdc->device_id = PCI_DEVICE_ID_QEMU_IPMI;
130 pdc->revision = 1;
131 pdc->class_id = PCI_CLASS_SERIAL_IPMI;
132
133 dc->vmsd = &vmstate_PCIIPMIBTDevice;
134 dc->desc = "PCI IPMI BT";
135 pdc->realize = pci_ipmi_bt_realize;
136
137 iic->get_backend_data = pci_ipmi_bt_get_backend_data;
138 ipmi_bt_class_init(iic);
139 iic->get_fwinfo = pci_ipmi_bt_get_fwinfo;
140 }
141
142 static const TypeInfo pci_ipmi_bt_info = {
143 .name = TYPE_PCI_IPMI_BT,
144 .parent = TYPE_PCI_DEVICE,
145 .instance_size = sizeof(PCIIPMIBTDevice),
146 .instance_init = pci_ipmi_bt_instance_init,
147 .class_init = pci_ipmi_bt_class_init,
148 .interfaces = (const InterfaceInfo[]) {
149 { TYPE_IPMI_INTERFACE },
150 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
151 { }
152 }
153 };
154
pci_ipmi_bt_register_types(void)155 static void pci_ipmi_bt_register_types(void)
156 {
157 type_register_static(&pci_ipmi_bt_info);
158 }
159
160 type_init(pci_ipmi_bt_register_types)
161