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22#include "hw/pci/pci_bridge.h"
23#include "hw/pci/pci_ids.h"
24#include "hw/pci/msi.h"
25#include "hw/pci/shpc.h"
26#include "hw/pci/slotid_cap.h"
27#include "exec/memory.h"
28#include "hw/pci/pci_bus.h"
29#include "hw/hotplug.h"
30
31#define TYPE_PCI_BRIDGE_DEV "pci-bridge"
32#define TYPE_PCI_BRIDGE_SEAT_DEV "pci-bridge-seat"
33#define PCI_BRIDGE_DEV(obj) \
34 OBJECT_CHECK(PCIBridgeDev, (obj), TYPE_PCI_BRIDGE_DEV)
35
36struct PCIBridgeDev {
37
38 PCIBridge parent_obj;
39
40
41 MemoryRegion bar;
42 uint8_t chassis_nr;
43#define PCI_BRIDGE_DEV_F_MSI_REQ 0
44#define PCI_BRIDGE_DEV_F_SHPC_REQ 1
45 uint32_t flags;
46};
47typedef struct PCIBridgeDev PCIBridgeDev;
48
49static int pci_bridge_dev_initfn(PCIDevice *dev)
50{
51 PCIBridge *br = PCI_BRIDGE(dev);
52 PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
53 int err;
54
55 err = pci_bridge_initfn(dev, TYPE_PCI_BUS);
56 if (err) {
57 goto bridge_error;
58 }
59 if (bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_SHPC_REQ)) {
60 dev->config[PCI_INTERRUPT_PIN] = 0x1;
61 memory_region_init(&bridge_dev->bar, OBJECT(dev), "shpc-bar",
62 shpc_bar_size(dev));
63 err = shpc_init(dev, &br->sec_bus, &bridge_dev->bar, 0);
64 if (err) {
65 goto shpc_error;
66 }
67 } else {
68
69 bridge_dev->flags &= ~(1 << PCI_BRIDGE_DEV_F_MSI_REQ);
70 }
71 err = slotid_cap_init(dev, 0, bridge_dev->chassis_nr, 0);
72 if (err) {
73 goto slotid_error;
74 }
75 if ((bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_MSI_REQ)) &&
76 msi_supported) {
77 err = msi_init(dev, 0, 1, true, true);
78 if (err < 0) {
79 goto msi_error;
80 }
81 }
82 if (shpc_present(dev)) {
83
84
85 pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY |
86 PCI_BASE_ADDRESS_MEM_TYPE_64, &bridge_dev->bar);
87 }
88 return 0;
89msi_error:
90 slotid_cap_cleanup(dev);
91slotid_error:
92 if (shpc_present(dev)) {
93 shpc_cleanup(dev, &bridge_dev->bar);
94 }
95shpc_error:
96 pci_bridge_exitfn(dev);
97bridge_error:
98 return err;
99}
100
101static void pci_bridge_dev_exitfn(PCIDevice *dev)
102{
103 PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
104 if (msi_present(dev)) {
105 msi_uninit(dev);
106 }
107 slotid_cap_cleanup(dev);
108 if (shpc_present(dev)) {
109 shpc_cleanup(dev, &bridge_dev->bar);
110 }
111 pci_bridge_exitfn(dev);
112}
113
114static void pci_bridge_dev_instance_finalize(Object *obj)
115{
116
117 shpc_free(PCI_DEVICE(obj));
118}
119
120static void pci_bridge_dev_write_config(PCIDevice *d,
121 uint32_t address, uint32_t val, int len)
122{
123 pci_bridge_write_config(d, address, val, len);
124 if (msi_present(d)) {
125 msi_write_config(d, address, val, len);
126 }
127 if (shpc_present(d)) {
128 shpc_cap_write_config(d, address, val, len);
129 }
130}
131
132static void qdev_pci_bridge_dev_reset(DeviceState *qdev)
133{
134 PCIDevice *dev = PCI_DEVICE(qdev);
135
136 pci_bridge_reset(qdev);
137 if (shpc_present(dev)) {
138 shpc_reset(dev);
139 }
140}
141
142static Property pci_bridge_dev_properties[] = {
143
144 DEFINE_PROP_UINT8(PCI_BRIDGE_DEV_PROP_CHASSIS_NR, PCIBridgeDev, chassis_nr,
145 0),
146 DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, flags,
147 PCI_BRIDGE_DEV_F_MSI_REQ, true),
148 DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags,
149 PCI_BRIDGE_DEV_F_SHPC_REQ, true),
150 DEFINE_PROP_END_OF_LIST(),
151};
152
153static bool pci_device_shpc_present(void *opaque, int version_id)
154{
155 PCIDevice *dev = opaque;
156
157 return shpc_present(dev);
158}
159
160static const VMStateDescription pci_bridge_dev_vmstate = {
161 .name = "pci_bridge",
162 .fields = (VMStateField[]) {
163 VMSTATE_PCI_DEVICE(parent_obj, PCIBridge),
164 SHPC_VMSTATE(shpc, PCIDevice, pci_device_shpc_present),
165 VMSTATE_END_OF_LIST()
166 }
167};
168
169static void pci_bridge_dev_hotplug_cb(HotplugHandler *hotplug_dev,
170 DeviceState *dev, Error **errp)
171{
172 PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev);
173
174 if (!shpc_present(pci_hotplug_dev)) {
175 error_setg(errp, "standard hotplug controller has been disabled for "
176 "this %s", TYPE_PCI_BRIDGE_DEV);
177 return;
178 }
179 shpc_device_hotplug_cb(hotplug_dev, dev, errp);
180}
181
182static void pci_bridge_dev_hot_unplug_request_cb(HotplugHandler *hotplug_dev,
183 DeviceState *dev,
184 Error **errp)
185{
186 PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev);
187
188 if (!shpc_present(pci_hotplug_dev)) {
189 error_setg(errp, "standard hotplug controller has been disabled for "
190 "this %s", TYPE_PCI_BRIDGE_DEV);
191 return;
192 }
193 shpc_device_hot_unplug_request_cb(hotplug_dev, dev, errp);
194}
195
196static void pci_bridge_dev_class_init(ObjectClass *klass, void *data)
197{
198 DeviceClass *dc = DEVICE_CLASS(klass);
199 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
200 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
201
202 k->init = pci_bridge_dev_initfn;
203 k->exit = pci_bridge_dev_exitfn;
204 k->config_write = pci_bridge_dev_write_config;
205 k->vendor_id = PCI_VENDOR_ID_REDHAT;
206 k->device_id = PCI_DEVICE_ID_REDHAT_BRIDGE;
207 k->class_id = PCI_CLASS_BRIDGE_PCI;
208 k->is_bridge = 1,
209 dc->desc = "Standard PCI Bridge";
210 dc->reset = qdev_pci_bridge_dev_reset;
211 dc->props = pci_bridge_dev_properties;
212 dc->vmsd = &pci_bridge_dev_vmstate;
213 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
214 hc->plug = pci_bridge_dev_hotplug_cb;
215 hc->unplug_request = pci_bridge_dev_hot_unplug_request_cb;
216}
217
218static const TypeInfo pci_bridge_dev_info = {
219 .name = TYPE_PCI_BRIDGE_DEV,
220 .parent = TYPE_PCI_BRIDGE,
221 .instance_size = sizeof(PCIBridgeDev),
222 .class_init = pci_bridge_dev_class_init,
223 .instance_finalize = pci_bridge_dev_instance_finalize,
224 .interfaces = (InterfaceInfo[]) {
225 { TYPE_HOTPLUG_HANDLER },
226 { }
227 }
228};
229
230
231
232
233
234
235static void pci_bridge_dev_seat_class_init(ObjectClass *klass, void *data)
236{
237 DeviceClass *dc = DEVICE_CLASS(klass);
238 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
239
240 k->device_id = PCI_DEVICE_ID_REDHAT_BRIDGE_SEAT;
241 dc->desc = "Standard PCI Bridge (multiseat)";
242}
243
244static const TypeInfo pci_bridge_dev_seat_info = {
245 .name = TYPE_PCI_BRIDGE_SEAT_DEV,
246 .parent = TYPE_PCI_BRIDGE_DEV,
247 .instance_size = sizeof(PCIBridgeDev),
248 .class_init = pci_bridge_dev_seat_class_init,
249};
250
251static void pci_bridge_dev_register(void)
252{
253 type_register_static(&pci_bridge_dev_info);
254 type_register_static(&pci_bridge_dev_seat_info);
255}
256
257type_init(pci_bridge_dev_register);
258