1 /* 2 * QEMU Generic PCIE-PCI Bridge 3 * 4 * Copyright (c) 2017 Aleksandr Bezzubikov 5 * 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. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "qapi/error.h" 12 #include "qemu/module.h" 13 #include "hw/pci/pci.h" 14 #include "hw/pci/pci_bus.h" 15 #include "hw/pci/pci_bridge.h" 16 #include "hw/pci/msi.h" 17 #include "hw/pci/shpc.h" 18 #include "hw/pci/slotid_cap.h" 19 #include "hw/qdev-properties.h" 20 #include "qom/object.h" 21 22 struct PCIEPCIBridge { 23 /*< private >*/ 24 PCIBridge parent_obj; 25 26 OnOffAuto msi; 27 MemoryRegion shpc_bar; 28 /*< public >*/ 29 }; 30 31 #define TYPE_PCIE_PCI_BRIDGE_DEV "pcie-pci-bridge" 32 OBJECT_DECLARE_SIMPLE_TYPE(PCIEPCIBridge, PCIE_PCI_BRIDGE_DEV) 33 34 static void pcie_pci_bridge_realize(PCIDevice *d, Error **errp) 35 { 36 PCIBridge *br = PCI_BRIDGE(d); 37 PCIEPCIBridge *pcie_br = PCIE_PCI_BRIDGE_DEV(d); 38 int rc, pos; 39 40 pci_bridge_initfn(d, TYPE_PCI_BUS); 41 42 d->config[PCI_INTERRUPT_PIN] = 0x1; 43 memory_region_init(&pcie_br->shpc_bar, OBJECT(d), "shpc-bar", 44 shpc_bar_size(d)); 45 rc = shpc_init(d, &br->sec_bus, &pcie_br->shpc_bar, 0, errp); 46 if (rc) { 47 goto error; 48 } 49 50 rc = pcie_cap_init(d, 0, PCI_EXP_TYPE_PCI_BRIDGE, 0, errp); 51 if (rc < 0) { 52 goto cap_error; 53 } 54 55 pos = pci_pm_init(d, 0, errp); 56 if (pos < 0) { 57 goto pm_error; 58 } 59 pci_set_word(d->config + pos + PCI_PM_PMC, 0x3); 60 61 pcie_cap_arifwd_init(d); 62 pcie_cap_deverr_init(d); 63 64 rc = pcie_aer_init(d, PCI_ERR_VER, 0x100, PCI_ERR_SIZEOF, errp); 65 if (rc < 0) { 66 goto aer_error; 67 } 68 69 Error *local_err = NULL; 70 if (pcie_br->msi != ON_OFF_AUTO_OFF) { 71 rc = msi_init(d, 0, 1, true, true, &local_err); 72 if (rc < 0) { 73 assert(rc == -ENOTSUP); 74 if (pcie_br->msi != ON_OFF_AUTO_ON) { 75 error_free(local_err); 76 } else { 77 /* failed to satisfy user's explicit request for MSI */ 78 error_propagate(errp, local_err); 79 goto msi_error; 80 } 81 } 82 } 83 pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY | 84 PCI_BASE_ADDRESS_MEM_TYPE_64, &pcie_br->shpc_bar); 85 return; 86 87 msi_error: 88 pcie_aer_exit(d); 89 aer_error: 90 pm_error: 91 pcie_cap_exit(d); 92 cap_error: 93 shpc_cleanup(d, &pcie_br->shpc_bar); 94 error: 95 pci_bridge_exitfn(d); 96 } 97 98 static void pcie_pci_bridge_exit(PCIDevice *d) 99 { 100 PCIEPCIBridge *bridge_dev = PCIE_PCI_BRIDGE_DEV(d); 101 pcie_cap_exit(d); 102 shpc_cleanup(d, &bridge_dev->shpc_bar); 103 pci_bridge_exitfn(d); 104 } 105 106 static void pcie_pci_bridge_reset(DeviceState *qdev) 107 { 108 PCIDevice *d = PCI_DEVICE(qdev); 109 pci_bridge_reset(qdev); 110 if (msi_present(d)) { 111 msi_reset(d); 112 } 113 shpc_reset(d); 114 } 115 116 static void pcie_pci_bridge_write_config(PCIDevice *d, 117 uint32_t address, uint32_t val, int len) 118 { 119 pci_bridge_write_config(d, address, val, len); 120 if (msi_present(d)) { 121 msi_write_config(d, address, val, len); 122 } 123 shpc_cap_write_config(d, address, val, len); 124 } 125 126 static const Property pcie_pci_bridge_dev_properties[] = { 127 DEFINE_PROP_ON_OFF_AUTO("msi", PCIEPCIBridge, msi, ON_OFF_AUTO_AUTO), 128 }; 129 130 static const VMStateDescription pcie_pci_bridge_dev_vmstate = { 131 .name = TYPE_PCIE_PCI_BRIDGE_DEV, 132 .priority = MIG_PRI_PCI_BUS, 133 .fields = (const VMStateField[]) { 134 VMSTATE_PCI_DEVICE(parent_obj, PCIBridge), 135 SHPC_VMSTATE(shpc, PCIDevice, NULL), 136 VMSTATE_END_OF_LIST() 137 } 138 }; 139 140 static void pcie_pci_bridge_class_init(ObjectClass *klass, void *data) 141 { 142 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 143 DeviceClass *dc = DEVICE_CLASS(klass); 144 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 145 146 k->vendor_id = PCI_VENDOR_ID_REDHAT; 147 k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_BRIDGE; 148 k->realize = pcie_pci_bridge_realize; 149 k->exit = pcie_pci_bridge_exit; 150 k->config_write = pcie_pci_bridge_write_config; 151 dc->vmsd = &pcie_pci_bridge_dev_vmstate; 152 device_class_set_props(dc, pcie_pci_bridge_dev_properties); 153 device_class_set_legacy_reset(dc, pcie_pci_bridge_reset); 154 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 155 hc->plug = pci_bridge_dev_plug_cb; 156 hc->unplug = pci_bridge_dev_unplug_cb; 157 hc->unplug_request = pci_bridge_dev_unplug_request_cb; 158 } 159 160 static const TypeInfo pcie_pci_bridge_info = { 161 .name = TYPE_PCIE_PCI_BRIDGE_DEV, 162 .parent = TYPE_PCI_BRIDGE, 163 .instance_size = sizeof(PCIEPCIBridge), 164 .class_init = pcie_pci_bridge_class_init, 165 .interfaces = (InterfaceInfo[]) { 166 { TYPE_HOTPLUG_HANDLER }, 167 { INTERFACE_PCIE_DEVICE }, 168 { }, 169 } 170 }; 171 172 static void pciepci_register(void) 173 { 174 type_register_static(&pcie_pci_bridge_info); 175 } 176 177 type_init(pciepci_register); 178