2 * QEMU Generic PCIE-PCI Bridge
4 * Copyright (c) 2017 Aleksandr Bezzubikov
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
10 #include "qemu/osdep.h"
11 #include "qapi/error.h"
12 #include "hw/pci/pci.h"
13 #include "hw/pci/pci_bus.h"
14 #include "hw/pci/pci_bridge.h"
15 #include "hw/pci/msi.h"
16 #include "hw/pci/shpc.h"
17 #include "hw/pci/slotid_cap.h"
19 typedef struct PCIEPCIBridge {
24 MemoryRegion shpc_bar;
28 #define TYPE_PCIE_PCI_BRIDGE_DEV "pcie-pci-bridge"
29 #define PCIE_PCI_BRIDGE_DEV(obj) \
30 OBJECT_CHECK(PCIEPCIBridge, (obj), TYPE_PCIE_PCI_BRIDGE_DEV)
32 static void pcie_pci_bridge_realize(PCIDevice *d, Error **errp)
34 PCIBridge *br = PCI_BRIDGE(d);
35 PCIEPCIBridge *pcie_br = PCIE_PCI_BRIDGE_DEV(d);
38 pci_bridge_initfn(d, TYPE_PCI_BUS);
40 d->config[PCI_INTERRUPT_PIN] = 0x1;
41 memory_region_init(&pcie_br->shpc_bar, OBJECT(d), "shpc-bar",
43 rc = shpc_init(d, &br->sec_bus, &pcie_br->shpc_bar, 0, errp);
48 rc = pcie_cap_init(d, 0, PCI_EXP_TYPE_PCI_BRIDGE, 0, errp);
53 pos = pci_add_capability(d, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF, errp);
58 pci_set_word(d->config + pos + PCI_PM_PMC, 0x3);
60 pcie_cap_arifwd_init(d);
61 pcie_cap_deverr_init(d);
63 rc = pcie_aer_init(d, PCI_ERR_VER, 0x100, PCI_ERR_SIZEOF, errp);
68 Error *local_err = NULL;
69 if (pcie_br->msi != ON_OFF_AUTO_OFF) {
70 rc = msi_init(d, 0, 1, true, true, &local_err);
72 assert(rc == -ENOTSUP);
73 if (pcie_br->msi != ON_OFF_AUTO_ON) {
74 error_free(local_err);
76 /* failed to satisfy user's explicit request for MSI */
77 error_propagate(errp, local_err);
82 pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY |
83 PCI_BASE_ADDRESS_MEM_TYPE_64, &pcie_br->shpc_bar);
92 shpc_cleanup(d, &pcie_br->shpc_bar);
97 static void pcie_pci_bridge_exit(PCIDevice *d)
99 PCIEPCIBridge *bridge_dev = PCIE_PCI_BRIDGE_DEV(d);
101 shpc_cleanup(d, &bridge_dev->shpc_bar);
102 pci_bridge_exitfn(d);
105 static void pcie_pci_bridge_reset(DeviceState *qdev)
107 PCIDevice *d = PCI_DEVICE(qdev);
108 pci_bridge_reset(qdev);
109 if (msi_present(d)) {
115 static void pcie_pci_bridge_write_config(PCIDevice *d,
116 uint32_t address, uint32_t val, int len)
118 pci_bridge_write_config(d, address, val, len);
119 if (msi_present(d)) {
120 msi_write_config(d, address, val, len);
122 shpc_cap_write_config(d, address, val, len);
125 static Property pcie_pci_bridge_dev_properties[] = {
126 DEFINE_PROP_ON_OFF_AUTO("msi", PCIEPCIBridge, msi, ON_OFF_AUTO_AUTO),
127 DEFINE_PROP_END_OF_LIST(),
130 static const VMStateDescription pcie_pci_bridge_dev_vmstate = {
131 .name = TYPE_PCIE_PCI_BRIDGE_DEV,
132 .fields = (VMStateField[]) {
133 VMSTATE_PCI_DEVICE(parent_obj, PCIBridge),
134 SHPC_VMSTATE(shpc, PCIDevice, NULL),
135 VMSTATE_END_OF_LIST()
139 static void pcie_pci_bridge_hotplug_cb(HotplugHandler *hotplug_dev,
140 DeviceState *dev, Error **errp)
142 PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev);
144 if (!shpc_present(pci_hotplug_dev)) {
145 error_setg(errp, "standard hotplug controller has been disabled for "
146 "this %s", TYPE_PCIE_PCI_BRIDGE_DEV);
149 shpc_device_hotplug_cb(hotplug_dev, dev, errp);
152 static void pcie_pci_bridge_hot_unplug_request_cb(HotplugHandler *hotplug_dev,
156 PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev);
158 if (!shpc_present(pci_hotplug_dev)) {
159 error_setg(errp, "standard hotplug controller has been disabled for "
160 "this %s", TYPE_PCIE_PCI_BRIDGE_DEV);
163 shpc_device_hot_unplug_request_cb(hotplug_dev, dev, errp);
166 static void pcie_pci_bridge_class_init(ObjectClass *klass, void *data)
168 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
169 DeviceClass *dc = DEVICE_CLASS(klass);
170 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
174 k->vendor_id = PCI_VENDOR_ID_REDHAT;
175 k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_BRIDGE;
176 k->realize = pcie_pci_bridge_realize;
177 k->exit = pcie_pci_bridge_exit;
178 k->config_write = pcie_pci_bridge_write_config;
179 dc->vmsd = &pcie_pci_bridge_dev_vmstate;
180 dc->props = pcie_pci_bridge_dev_properties;
181 dc->vmsd = &pcie_pci_bridge_dev_vmstate;
182 dc->reset = &pcie_pci_bridge_reset;
183 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
184 hc->plug = pcie_pci_bridge_hotplug_cb;
185 hc->unplug_request = pcie_pci_bridge_hot_unplug_request_cb;
188 static const TypeInfo pcie_pci_bridge_info = {
189 .name = TYPE_PCIE_PCI_BRIDGE_DEV,
190 .parent = TYPE_PCI_BRIDGE,
191 .instance_size = sizeof(PCIEPCIBridge),
192 .class_init = pcie_pci_bridge_class_init,
193 .interfaces = (InterfaceInfo[]) {
194 { TYPE_HOTPLUG_HANDLER },
195 { INTERFACE_PCIE_DEVICE },
200 static void pciepci_register(void)
202 type_register_static(&pcie_pci_bridge_info);
205 type_init(pciepci_register);