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