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32#include "qemu/osdep.h"
33#include "qapi/error.h"
34#include "hw/irq.h"
35#include "hw/pci-host/gpex.h"
36#include "hw/qdev-properties.h"
37#include "migration/vmstate.h"
38#include "qemu/module.h"
39
40
41
42
43
44static void gpex_set_irq(void *opaque, int irq_num, int level)
45{
46 GPEXHost *s = opaque;
47
48 qemu_set_irq(s->irq[irq_num], level);
49}
50
51int gpex_set_irq_num(GPEXHost *s, int index, int gsi)
52{
53 if (index >= GPEX_NUM_IRQS) {
54 return -EINVAL;
55 }
56
57 s->irq_num[index] = gsi;
58 return 0;
59}
60
61static PCIINTxRoute gpex_route_intx_pin_to_irq(void *opaque, int pin)
62{
63 PCIINTxRoute route;
64 GPEXHost *s = opaque;
65 int gsi = s->irq_num[pin];
66
67 route.irq = gsi;
68 if (gsi < 0) {
69 route.mode = PCI_INTX_DISABLED;
70 } else {
71 route.mode = PCI_INTX_ENABLED;
72 }
73
74 return route;
75}
76
77static void gpex_host_realize(DeviceState *dev, Error **errp)
78{
79 PCIHostState *pci = PCI_HOST_BRIDGE(dev);
80 GPEXHost *s = GPEX_HOST(dev);
81 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
82 PCIExpressHost *pex = PCIE_HOST_BRIDGE(dev);
83 int i;
84
85 pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX);
86 memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX);
87 memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024);
88
89 sysbus_init_mmio(sbd, &pex->mmio);
90 sysbus_init_mmio(sbd, &s->io_mmio);
91 sysbus_init_mmio(sbd, &s->io_ioport);
92 for (i = 0; i < GPEX_NUM_IRQS; i++) {
93 sysbus_init_irq(sbd, &s->irq[i]);
94 s->irq_num[i] = -1;
95 }
96
97 pci->bus = pci_register_root_bus(dev, "pcie.0", gpex_set_irq,
98 pci_swizzle_map_irq_fn, s, &s->io_mmio,
99 &s->io_ioport, 0, 4, TYPE_PCIE_BUS);
100
101 pci_bus_set_route_irq_fn(pci->bus, gpex_route_intx_pin_to_irq);
102 qdev_realize(DEVICE(&s->gpex_root), BUS(pci->bus), &error_fatal);
103}
104
105static const char *gpex_host_root_bus_path(PCIHostState *host_bridge,
106 PCIBus *rootbus)
107{
108 return "0000:00";
109}
110
111static void gpex_host_class_init(ObjectClass *klass, void *data)
112{
113 DeviceClass *dc = DEVICE_CLASS(klass);
114 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
115
116 hc->root_bus_path = gpex_host_root_bus_path;
117 dc->realize = gpex_host_realize;
118 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
119 dc->fw_name = "pci";
120}
121
122static void gpex_host_initfn(Object *obj)
123{
124 GPEXHost *s = GPEX_HOST(obj);
125 GPEXRootState *root = &s->gpex_root;
126
127 object_initialize_child(obj, "gpex_root", root, TYPE_GPEX_ROOT_DEVICE);
128 qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
129 qdev_prop_set_bit(DEVICE(root), "multifunction", false);
130}
131
132static const TypeInfo gpex_host_info = {
133 .name = TYPE_GPEX_HOST,
134 .parent = TYPE_PCIE_HOST_BRIDGE,
135 .instance_size = sizeof(GPEXHost),
136 .instance_init = gpex_host_initfn,
137 .class_init = gpex_host_class_init,
138};
139
140
141
142
143
144static const VMStateDescription vmstate_gpex_root = {
145 .name = "gpex_root",
146 .version_id = 1,
147 .minimum_version_id = 1,
148 .fields = (VMStateField[]) {
149 VMSTATE_PCI_DEVICE(parent_obj, GPEXRootState),
150 VMSTATE_END_OF_LIST()
151 }
152};
153
154static void gpex_root_class_init(ObjectClass *klass, void *data)
155{
156 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
157 DeviceClass *dc = DEVICE_CLASS(klass);
158
159 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
160 dc->desc = "QEMU generic PCIe host bridge";
161 dc->vmsd = &vmstate_gpex_root;
162 k->vendor_id = PCI_VENDOR_ID_REDHAT;
163 k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_HOST;
164 k->revision = 0;
165 k->class_id = PCI_CLASS_BRIDGE_HOST;
166
167
168
169
170 dc->user_creatable = false;
171}
172
173static const TypeInfo gpex_root_info = {
174 .name = TYPE_GPEX_ROOT_DEVICE,
175 .parent = TYPE_PCI_DEVICE,
176 .instance_size = sizeof(GPEXRootState),
177 .class_init = gpex_root_class_init,
178 .interfaces = (InterfaceInfo[]) {
179 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
180 { },
181 },
182};
183
184static void gpex_register(void)
185{
186 type_register_static(&gpex_root_info);
187 type_register_static(&gpex_host_info);
188}
189
190type_init(gpex_register)
191