| /* |
| * Standard PCI Bridge Device |
| * |
| * Copyright (c) 2011 Red Hat Inc. Author: Michael S. Tsirkin <mst@redhat.com> |
| * |
| * http://www.pcisig.com/specifications/conventional/pci_to_pci_bridge_architecture/ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "qemu/module.h" |
| #include "hw/pci/pci_bridge.h" |
| #include "hw/pci/pci_ids.h" |
| #include "hw/pci/msi.h" |
| #include "hw/pci/shpc.h" |
| #include "hw/pci/slotid_cap.h" |
| #include "hw/qdev-properties.h" |
| #include "exec/memory.h" |
| #include "hw/pci/pci_bus.h" |
| #include "hw/hotplug.h" |
| #include "qom/object.h" |
| |
| #define TYPE_PCI_BRIDGE_DEV "pci-bridge" |
| #define TYPE_PCI_BRIDGE_SEAT_DEV "pci-bridge-seat" |
| OBJECT_DECLARE_SIMPLE_TYPE(PCIBridgeDev, PCI_BRIDGE_DEV) |
| |
| struct PCIBridgeDev { |
| /*< private >*/ |
| PCIBridge parent_obj; |
| /*< public >*/ |
| |
| MemoryRegion bar; |
| uint8_t chassis_nr; |
| #define PCI_BRIDGE_DEV_F_SHPC_REQ 0 |
| uint32_t flags; |
| |
| OnOffAuto msi; |
| |
| /* additional resources to reserve */ |
| PCIResReserve res_reserve; |
| }; |
| |
| static void pci_bridge_dev_realize(PCIDevice *dev, Error **errp) |
| { |
| PCIBridge *br = PCI_BRIDGE(dev); |
| PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev); |
| int err; |
| Error *local_err = NULL; |
| |
| pci_bridge_initfn(dev, TYPE_PCI_BUS); |
| |
| if (bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_SHPC_REQ)) { |
| dev->config[PCI_INTERRUPT_PIN] = 0x1; |
| memory_region_init(&bridge_dev->bar, OBJECT(dev), "shpc-bar", |
| shpc_bar_size(dev)); |
| err = shpc_init(dev, &br->sec_bus, &bridge_dev->bar, 0, errp); |
| if (err) { |
| goto shpc_error; |
| } |
| } else { |
| /* MSI is not applicable without SHPC */ |
| bridge_dev->msi = ON_OFF_AUTO_OFF; |
| } |
| |
| err = slotid_cap_init(dev, 0, bridge_dev->chassis_nr, 0, errp); |
| if (err) { |
| goto slotid_error; |
| } |
| |
| if (bridge_dev->msi != ON_OFF_AUTO_OFF) { |
| /* it means SHPC exists, because MSI is needed by SHPC */ |
| |
| err = msi_init(dev, 0, 1, true, true, &local_err); |
| /* Any error other than -ENOTSUP(board's MSI support is broken) |
| * is a programming error */ |
| assert(!err || err == -ENOTSUP); |
| if (err && bridge_dev->msi == ON_OFF_AUTO_ON) { |
| /* Can't satisfy user's explicit msi=on request, fail */ |
| error_append_hint(&local_err, "You have to use msi=auto (default) " |
| "or msi=off with this machine type.\n"); |
| error_propagate(errp, local_err); |
| goto msi_error; |
| } |
| assert(!local_err || bridge_dev->msi == ON_OFF_AUTO_AUTO); |
| /* With msi=auto, we fall back to MSI off silently */ |
| error_free(local_err); |
| } |
| |
| err = pci_bridge_qemu_reserve_cap_init(dev, 0, |
| bridge_dev->res_reserve, errp); |
| if (err) { |
| goto cap_error; |
| } |
| |
| if (shpc_present(dev)) { |
| /* TODO: spec recommends using 64 bit prefetcheable BAR. |
| * Check whether that works well. */ |
| pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY | |
| PCI_BASE_ADDRESS_MEM_TYPE_64, &bridge_dev->bar); |
| } |
| return; |
| |
| cap_error: |
| msi_uninit(dev); |
| msi_error: |
| slotid_cap_cleanup(dev); |
| slotid_error: |
| if (shpc_present(dev)) { |
| shpc_cleanup(dev, &bridge_dev->bar); |
| } |
| shpc_error: |
| pci_bridge_exitfn(dev); |
| } |
| |
| static void pci_bridge_dev_exitfn(PCIDevice *dev) |
| { |
| PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev); |
| |
| pci_del_capability(dev, PCI_CAP_ID_VNDR, sizeof(PCIBridgeQemuCap)); |
| if (msi_present(dev)) { |
| msi_uninit(dev); |
| } |
| slotid_cap_cleanup(dev); |
| if (shpc_present(dev)) { |
| shpc_cleanup(dev, &bridge_dev->bar); |
| } |
| pci_bridge_exitfn(dev); |
| } |
| |
| static void pci_bridge_dev_instance_finalize(Object *obj) |
| { |
| /* this function is idempotent and handles (PCIDevice.shpc == NULL) */ |
| shpc_free(PCI_DEVICE(obj)); |
| } |
| |
| static void pci_bridge_dev_write_config(PCIDevice *d, |
| uint32_t address, uint32_t val, int len) |
| { |
| pci_bridge_write_config(d, address, val, len); |
| if (msi_present(d)) { |
| msi_write_config(d, address, val, len); |
| } |
| if (shpc_present(d)) { |
| shpc_cap_write_config(d, address, val, len); |
| } |
| } |
| |
| static void qdev_pci_bridge_dev_reset(DeviceState *qdev) |
| { |
| PCIDevice *dev = PCI_DEVICE(qdev); |
| |
| pci_bridge_reset(qdev); |
| if (shpc_present(dev)) { |
| shpc_reset(dev); |
| } |
| } |
| |
| static Property pci_bridge_dev_properties[] = { |
| /* Note: 0 is not a legal chassis number. */ |
| DEFINE_PROP_UINT8(PCI_BRIDGE_DEV_PROP_CHASSIS_NR, PCIBridgeDev, chassis_nr, |
| 0), |
| DEFINE_PROP_ON_OFF_AUTO(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, msi, |
| ON_OFF_AUTO_AUTO), |
| DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags, |
| PCI_BRIDGE_DEV_F_SHPC_REQ, true), |
| DEFINE_PROP_UINT32("bus-reserve", PCIBridgeDev, |
| res_reserve.bus, -1), |
| DEFINE_PROP_SIZE("io-reserve", PCIBridgeDev, |
| res_reserve.io, -1), |
| DEFINE_PROP_SIZE("mem-reserve", PCIBridgeDev, |
| res_reserve.mem_non_pref, -1), |
| DEFINE_PROP_SIZE("pref32-reserve", PCIBridgeDev, |
| res_reserve.mem_pref_32, -1), |
| DEFINE_PROP_SIZE("pref64-reserve", PCIBridgeDev, |
| res_reserve.mem_pref_64, -1), |
| |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static bool pci_device_shpc_present(void *opaque, int version_id) |
| { |
| PCIDevice *dev = opaque; |
| |
| return shpc_present(dev); |
| } |
| |
| static const VMStateDescription pci_bridge_dev_vmstate = { |
| .name = "pci_bridge", |
| .priority = MIG_PRI_PCI_BUS, |
| .fields = (VMStateField[]) { |
| VMSTATE_PCI_DEVICE(parent_obj, PCIBridge), |
| SHPC_VMSTATE(shpc, PCIDevice, pci_device_shpc_present), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| void pci_bridge_dev_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, |
| Error **errp) |
| { |
| PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
| |
| if (!shpc_present(pci_hotplug_dev)) { |
| error_setg(errp, "standard hotplug controller has been disabled for " |
| "this %s", object_get_typename(OBJECT(hotplug_dev))); |
| return; |
| } |
| shpc_device_plug_cb(hotplug_dev, dev, errp); |
| } |
| |
| void pci_bridge_dev_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, |
| Error **errp) |
| { |
| PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
| |
| g_assert(shpc_present(pci_hotplug_dev)); |
| shpc_device_unplug_cb(hotplug_dev, dev, errp); |
| } |
| |
| void pci_bridge_dev_unplug_request_cb(HotplugHandler *hotplug_dev, |
| DeviceState *dev, Error **errp) |
| { |
| PCIDevice *pci_hotplug_dev = PCI_DEVICE(hotplug_dev); |
| |
| if (!shpc_present(pci_hotplug_dev)) { |
| error_setg(errp, "standard hotplug controller has been disabled for " |
| "this %s", object_get_typename(OBJECT(hotplug_dev))); |
| return; |
| } |
| shpc_device_unplug_request_cb(hotplug_dev, dev, errp); |
| } |
| |
| static void pci_bridge_dev_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); |
| |
| k->realize = pci_bridge_dev_realize; |
| k->exit = pci_bridge_dev_exitfn; |
| k->config_write = pci_bridge_dev_write_config; |
| k->vendor_id = PCI_VENDOR_ID_REDHAT; |
| k->device_id = PCI_DEVICE_ID_REDHAT_BRIDGE; |
| k->class_id = PCI_CLASS_BRIDGE_PCI; |
| k->is_bridge = true; |
| dc->desc = "Standard PCI Bridge"; |
| dc->reset = qdev_pci_bridge_dev_reset; |
| device_class_set_props(dc, pci_bridge_dev_properties); |
| dc->vmsd = &pci_bridge_dev_vmstate; |
| set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); |
| hc->plug = pci_bridge_dev_plug_cb; |
| hc->unplug = pci_bridge_dev_unplug_cb; |
| hc->unplug_request = pci_bridge_dev_unplug_request_cb; |
| } |
| |
| static const TypeInfo pci_bridge_dev_info = { |
| .name = TYPE_PCI_BRIDGE_DEV, |
| .parent = TYPE_PCI_BRIDGE, |
| .instance_size = sizeof(PCIBridgeDev), |
| .class_init = pci_bridge_dev_class_init, |
| .instance_finalize = pci_bridge_dev_instance_finalize, |
| .interfaces = (InterfaceInfo[]) { |
| { TYPE_HOTPLUG_HANDLER }, |
| { INTERFACE_CONVENTIONAL_PCI_DEVICE }, |
| { } |
| } |
| }; |
| |
| /* |
| * Multiseat bridge. Same as the standard pci bridge, only with a |
| * different pci id, so we can match it easily in the guest for |
| * automagic multiseat configuration. See docs/multiseat.txt for more. |
| */ |
| static void pci_bridge_dev_seat_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->device_id = PCI_DEVICE_ID_REDHAT_BRIDGE_SEAT; |
| dc->desc = "Standard PCI Bridge (multiseat)"; |
| } |
| |
| static const TypeInfo pci_bridge_dev_seat_info = { |
| .name = TYPE_PCI_BRIDGE_SEAT_DEV, |
| .parent = TYPE_PCI_BRIDGE_DEV, |
| .instance_size = sizeof(PCIBridgeDev), |
| .class_init = pci_bridge_dev_seat_class_init, |
| }; |
| |
| static void pci_bridge_dev_register(void) |
| { |
| type_register_static(&pci_bridge_dev_info); |
| type_register_static(&pci_bridge_dev_seat_info); |
| } |
| |
| type_init(pci_bridge_dev_register); |
