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_add_capability(d, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF, errp); 56 if (pos < 0) { 57 goto pm_error; 58 } 59 d->exp.pm_cap = pos; 60 pci_set_word(d->config + pos + PCI_PM_PMC, 0x3); 61 62 pcie_cap_arifwd_init(d); 63 pcie_cap_deverr_init(d); 64 65 rc = pcie_aer_init(d, PCI_ERR_VER, 0x100, PCI_ERR_SIZEOF, errp); 66 if (rc < 0) { 67 goto aer_error; 68 } 69 70 Error *local_err = NULL; 71 if (pcie_br->msi != ON_OFF_AUTO_OFF) { 72 rc = msi_init(d, 0, 1, true, true, &local_err); 73 if (rc < 0) { 74 assert(rc == -ENOTSUP); 75 if (pcie_br->msi != ON_OFF_AUTO_ON) { 76 error_free(local_err); 77 } else { 78 /* failed to satisfy user's explicit request for MSI */ 79 error_propagate(errp, local_err); 80 goto msi_error; 81 } 82 } 83 } 84 pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY | 85 PCI_BASE_ADDRESS_MEM_TYPE_64, &pcie_br->shpc_bar); 86 return; 87 88 msi_error: 89 pcie_aer_exit(d); 90 aer_error: 91 pm_error: 92 pcie_cap_exit(d); 93 cap_error: 94 shpc_cleanup(d, &pcie_br->shpc_bar); 95 error: 96 pci_bridge_exitfn(d); 97 } 98 99 static void pcie_pci_bridge_exit(PCIDevice *d) 100 { 101 PCIEPCIBridge *bridge_dev = PCIE_PCI_BRIDGE_DEV(d); 102 pcie_cap_exit(d); 103 shpc_cleanup(d, &bridge_dev->shpc_bar); 104 pci_bridge_exitfn(d); 105 } 106 107 static void pcie_pci_bridge_reset(DeviceState *qdev) 108 { 109 PCIDevice *d = PCI_DEVICE(qdev); 110 pci_bridge_reset(qdev); 111 if (msi_present(d)) { 112 msi_reset(d); 113 } 114 shpc_reset(d); 115 } 116 117 static void pcie_pci_bridge_write_config(PCIDevice *d, 118 uint32_t address, uint32_t val, int len) 119 { 120 pci_bridge_write_config(d, address, val, len); 121 if (msi_present(d)) { 122 msi_write_config(d, address, val, len); 123 } 124 shpc_cap_write_config(d, address, val, len); 125 } 126 127 static Property pcie_pci_bridge_dev_properties[] = { 128 DEFINE_PROP_ON_OFF_AUTO("msi", PCIEPCIBridge, msi, ON_OFF_AUTO_AUTO), 129 DEFINE_PROP_END_OF_LIST(), 130 }; 131 132 static const VMStateDescription pcie_pci_bridge_dev_vmstate = { 133 .name = TYPE_PCIE_PCI_BRIDGE_DEV, 134 .priority = MIG_PRI_PCI_BUS, 135 .fields = (VMStateField[]) { 136 VMSTATE_PCI_DEVICE(parent_obj, PCIBridge), 137 SHPC_VMSTATE(shpc, PCIDevice, NULL), 138 VMSTATE_END_OF_LIST() 139 } 140 }; 141 142 static void pcie_pci_bridge_class_init(ObjectClass *klass, void *data) 143 { 144 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 145 DeviceClass *dc = DEVICE_CLASS(klass); 146 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 147 148 k->is_bridge = true; 149 k->vendor_id = PCI_VENDOR_ID_REDHAT; 150 k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_BRIDGE; 151 k->realize = pcie_pci_bridge_realize; 152 k->exit = pcie_pci_bridge_exit; 153 k->config_write = pcie_pci_bridge_write_config; 154 dc->vmsd = &pcie_pci_bridge_dev_vmstate; 155 device_class_set_props(dc, pcie_pci_bridge_dev_properties); 156 dc->reset = &pcie_pci_bridge_reset; 157 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 158 hc->plug = pci_bridge_dev_plug_cb; 159 hc->unplug = pci_bridge_dev_unplug_cb; 160 hc->unplug_request = pci_bridge_dev_unplug_request_cb; 161 } 162 163 static const TypeInfo pcie_pci_bridge_info = { 164 .name = TYPE_PCIE_PCI_BRIDGE_DEV, 165 .parent = TYPE_PCI_BRIDGE, 166 .instance_size = sizeof(PCIEPCIBridge), 167 .class_init = pcie_pci_bridge_class_init, 168 .interfaces = (InterfaceInfo[]) { 169 { TYPE_HOTPLUG_HANDLER }, 170 { INTERFACE_PCIE_DEVICE }, 171 { }, 172 } 173 }; 174 175 static void pciepci_register(void) 176 { 177 type_register_static(&pcie_pci_bridge_info); 178 } 179 180 type_init(pciepci_register); 181