1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#include "qemu/osdep.h"
23#include "qapi/error.h"
24#include "hw/pci/pci_bridge.h"
25#include "hw/pci/pci_ids.h"
26#include "hw/pci/msi.h"
27#include "hw/pci/shpc.h"
28#include "hw/pci/slotid_cap.h"
29#include "exec/memory.h"
30#include "hw/pci/pci_bus.h"
31#include "hw/hotplug.h"
32
33#define TYPE_PCI_BRIDGE_DEV "pci-bridge"
34#define TYPE_PCI_BRIDGE_SEAT_DEV "pci-bridge-seat"
35#define PCI_BRIDGE_DEV(obj) \
36 OBJECT_CHECK(PCIBridgeDev, (obj), TYPE_PCI_BRIDGE_DEV)
37
38struct PCIBridgeDev {
39
40 PCIBridge parent_obj;
41
42
43 MemoryRegion bar;
44 uint8_t chassis_nr;
45#define PCI_BRIDGE_DEV_F_SHPC_REQ 0
46 uint32_t flags;
47
48 OnOffAuto msi;
49};
50typedef struct PCIBridgeDev PCIBridgeDev;
51
52static void pci_bridge_dev_realize(PCIDevice *dev, Error **errp)
53{
54 PCIBridge *br = PCI_BRIDGE(dev);
55 PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
56 int err;
57 Error *local_err = NULL;
58
59 pci_bridge_initfn(dev, TYPE_PCI_BUS);
60
61 if (bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_SHPC_REQ)) {
62 dev->config[PCI_INTERRUPT_PIN] = 0x1;
63 memory_region_init(&bridge_dev->bar, OBJECT(dev), "shpc-bar",
64 shpc_bar_size(dev));
65 err = shpc_init(dev, &br->sec_bus, &bridge_dev->bar, 0, errp);
66 if (err) {
67 goto shpc_error;
68 }
69 } else {
70
71 bridge_dev->msi = ON_OFF_AUTO_OFF;
72 }
73
74 err = slotid_cap_init(dev, 0, bridge_dev->chassis_nr, 0, errp);
75 if (err) {
76 goto slotid_error;
77 }
78
79 if (bridge_dev->msi != ON_OFF_AUTO_OFF) {
80
81
82 err = msi_init(dev, 0, 1, true, true, &local_err);
83
84
85 assert(!err || err == -ENOTSUP);
86 if (err && bridge_dev->msi == ON_OFF_AUTO_ON) {
87
88 error_append_hint(&local_err, "You have to use msi=auto (default) "
89 "or msi=off with this machine type.\n");
90 error_propagate(errp, local_err);
91 goto msi_error;
92 }
93 assert(!local_err || bridge_dev->msi == ON_OFF_AUTO_AUTO);
94
95 error_free(local_err);
96 }
97
98 if (shpc_present(dev)) {
99
100
101 pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY |
102 PCI_BASE_ADDRESS_MEM_TYPE_64, &bridge_dev->bar);
103 }
104 return;
105
106msi_error:
107 slotid_cap_cleanup(dev);
108slotid_error:
109 if (shpc_present(dev)) {
110 shpc_cleanup(dev, &bridge_dev->bar);
111 }
112shpc_error:
113 pci_bridge_exitfn(dev);
114}
115
116static void pci_bridge_dev_exitfn(PCIDevice *dev)
117{
118 PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
119 if (msi_present(dev)) {
120 msi_uninit(dev);
121 }
122 slotid_cap_cleanup(dev);
123 if (shpc_present(dev)) {
124 shpc_cleanup(dev, &bridge_dev->bar);
125 }
126 pci_bridge_exitfn(dev);
127}
128
129static void pci_bridge_dev_instance_finalize(Object *obj)
130{
131
132 shpc_free(PCI_DEVICE(obj));
133}
134
135static void pci_bridge_dev_write_config(PCIDevice *d,
136 uint32_t address, uint32_t val, int len)
137{
138 pci_bridge_write_config(d, address, val, len);
139 if (msi_present(d)) {
140 msi_write_config(d, address, val, len);
141 }
142 if (shpc_present(d)) {
143 shpc_cap_write_config(d, address, val, len);
144 }
145}
146
147static void qdev_pci_bridge_dev_reset(DeviceState *qdev)
148{
149 PCIDevice *dev = PCI_DEVICE(qdev);
150
151 pci_bridge_reset(qdev);
152 if (shpc_present(dev)) {
153 shpc_reset(dev);
154 }
155}
156
157static Property pci_bridge_dev_properties[] = {
158
159 DEFINE_PROP_UINT8(PCI_BRIDGE_DEV_PROP_CHASSIS_NR, PCIBridgeDev, chassis_nr,
160 0),
161 DEFINE_PROP_ON_OFF_AUTO(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, msi,
162 ON_OFF_AUTO_AUTO),
163 DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags,
164 PCI_BRIDGE_DEV_F_SHPC_REQ, true),
165 DEFINE_PROP_END_OF_LIST(),
166};
167
168static bool pci_device_shpc_present(void *opaque, int version_id)
169{
170 PCIDevice *dev = opaque;
171
172 return shpc_present(dev);
173}
174
175static const VMStateDescription pci_bridge_dev_vmstate = {
176 .name = "pci_bridge",
177 .fields = (VMStateField[]) {
178 VMSTATE_PCI_DEVICE(parent_obj, PCIBridge),
179 SHPC_VMSTATE(shpc, PCIDevice, pci_device_shpc_present),
180 VMSTATE_END_OF_LIST()
181 }
182};
183
184static void pci_bridge_dev_hotplug_cb(HotplugHandler *hotplug_dev,
185 DeviceState *dev, Error **errp)
186{
187 PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev);
188
189 if (!shpc_present(pci_hotplug_dev)) {
190 error_setg(errp, "standard hotplug controller has been disabled for "
191 "this %s", TYPE_PCI_BRIDGE_DEV);
192 return;
193 }
194 shpc_device_hotplug_cb(hotplug_dev, dev, errp);
195}
196
197static void pci_bridge_dev_hot_unplug_request_cb(HotplugHandler *hotplug_dev,
198 DeviceState *dev,
199 Error **errp)
200{
201 PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev);
202
203 if (!shpc_present(pci_hotplug_dev)) {
204 error_setg(errp, "standard hotplug controller has been disabled for "
205 "this %s", TYPE_PCI_BRIDGE_DEV);
206 return;
207 }
208 shpc_device_hot_unplug_request_cb(hotplug_dev, dev, errp);
209}
210
211static void pci_bridge_dev_class_init(ObjectClass *klass, void *data)
212{
213 DeviceClass *dc = DEVICE_CLASS(klass);
214 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
215 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
216
217 k->realize = pci_bridge_dev_realize;
218 k->exit = pci_bridge_dev_exitfn;
219 k->config_write = pci_bridge_dev_write_config;
220 k->vendor_id = PCI_VENDOR_ID_REDHAT;
221 k->device_id = PCI_DEVICE_ID_REDHAT_BRIDGE;
222 k->class_id = PCI_CLASS_BRIDGE_PCI;
223 k->is_bridge = 1,
224 dc->desc = "Standard PCI Bridge";
225 dc->reset = qdev_pci_bridge_dev_reset;
226 dc->props = pci_bridge_dev_properties;
227 dc->vmsd = &pci_bridge_dev_vmstate;
228 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
229 hc->plug = pci_bridge_dev_hotplug_cb;
230 hc->unplug_request = pci_bridge_dev_hot_unplug_request_cb;
231}
232
233static const TypeInfo pci_bridge_dev_info = {
234 .name = TYPE_PCI_BRIDGE_DEV,
235 .parent = TYPE_PCI_BRIDGE,
236 .instance_size = sizeof(PCIBridgeDev),
237 .class_init = pci_bridge_dev_class_init,
238 .instance_finalize = pci_bridge_dev_instance_finalize,
239 .interfaces = (InterfaceInfo[]) {
240 { TYPE_HOTPLUG_HANDLER },
241 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
242 { }
243 }
244};
245
246
247
248
249
250
251static void pci_bridge_dev_seat_class_init(ObjectClass *klass, void *data)
252{
253 DeviceClass *dc = DEVICE_CLASS(klass);
254 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
255
256 k->device_id = PCI_DEVICE_ID_REDHAT_BRIDGE_SEAT;
257 dc->desc = "Standard PCI Bridge (multiseat)";
258}
259
260static const TypeInfo pci_bridge_dev_seat_info = {
261 .name = TYPE_PCI_BRIDGE_SEAT_DEV,
262 .parent = TYPE_PCI_BRIDGE_DEV,
263 .instance_size = sizeof(PCIBridgeDev),
264 .class_init = pci_bridge_dev_seat_class_init,
265};
266
267static void pci_bridge_dev_register(void)
268{
269 type_register_static(&pci_bridge_dev_info);
270 type_register_static(&pci_bridge_dev_seat_info);
271}
272
273type_init(pci_bridge_dev_register);
274