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/*
* QEMU Generic PCIE-PCI Bridge
*
* Copyright (c) 2017 Aleksandr Bezzubikov
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_bus.h"
#include "hw/pci/pci_bridge.h"
#include "hw/pci/msi.h"
#include "hw/pci/shpc.h"
#include "hw/pci/slotid_cap.h"
typedef struct PCIEPCIBridge {
/*< private >*/
PCIBridge parent_obj;
OnOffAuto msi;
MemoryRegion shpc_bar;
/*< public >*/
} PCIEPCIBridge;
#define TYPE_PCIE_PCI_BRIDGE_DEV "pcie-pci-bridge"
#define PCIE_PCI_BRIDGE_DEV(obj) \
OBJECT_CHECK(PCIEPCIBridge, (obj), TYPE_PCIE_PCI_BRIDGE_DEV)
static void pcie_pci_bridge_realize(PCIDevice *d, Error **errp)
{
PCIBridge *br = PCI_BRIDGE(d);
PCIEPCIBridge *pcie_br = PCIE_PCI_BRIDGE_DEV(d);
int rc, pos;
pci_bridge_initfn(d, TYPE_PCI_BUS);
d->config[PCI_INTERRUPT_PIN] = 0x1;
memory_region_init(&pcie_br->shpc_bar, OBJECT(d), "shpc-bar",
shpc_bar_size(d));
rc = shpc_init(d, &br->sec_bus, &pcie_br->shpc_bar, 0, errp);
if (rc) {
goto error;
}
rc = pcie_cap_init(d, 0, PCI_EXP_TYPE_PCI_BRIDGE, 0, errp);
if (rc < 0) {
goto cap_error;
}
pos = pci_add_capability(d, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF, errp);
if (pos < 0) {
goto pm_error;
}
d->exp.pm_cap = pos;
pci_set_word(d->config + pos + PCI_PM_PMC, 0x3);
pcie_cap_arifwd_init(d);
pcie_cap_deverr_init(d);
rc = pcie_aer_init(d, PCI_ERR_VER, 0x100, PCI_ERR_SIZEOF, errp);
if (rc < 0) {
goto aer_error;
}
Error *local_err = NULL;
if (pcie_br->msi != ON_OFF_AUTO_OFF) {
rc = msi_init(d, 0, 1, true, true, &local_err);
if (rc < 0) {
assert(rc == -ENOTSUP);
if (pcie_br->msi != ON_OFF_AUTO_ON) {
error_free(local_err);
} else {
/* failed to satisfy user's explicit request for MSI */
error_propagate(errp, local_err);
goto msi_error;
}
}
}
pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_TYPE_64, &pcie_br->shpc_bar);
return;
msi_error:
pcie_aer_exit(d);
aer_error:
pm_error:
pcie_cap_exit(d);
cap_error:
shpc_cleanup(d, &pcie_br->shpc_bar);
error:
pci_bridge_exitfn(d);
}
static void pcie_pci_bridge_exit(PCIDevice *d)
{
PCIEPCIBridge *bridge_dev = PCIE_PCI_BRIDGE_DEV(d);
pcie_cap_exit(d);
shpc_cleanup(d, &bridge_dev->shpc_bar);
pci_bridge_exitfn(d);
}
static void pcie_pci_bridge_reset(DeviceState *qdev)
{
PCIDevice *d = PCI_DEVICE(qdev);
pci_bridge_reset(qdev);
if (msi_present(d)) {
msi_reset(d);
}
shpc_reset(d);
}
static void pcie_pci_bridge_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);
}
shpc_cap_write_config(d, address, val, len);
}
static Property pcie_pci_bridge_dev_properties[] = {
DEFINE_PROP_ON_OFF_AUTO("msi", PCIEPCIBridge, msi, ON_OFF_AUTO_AUTO),
DEFINE_PROP_END_OF_LIST(),
};
static const VMStateDescription pcie_pci_bridge_dev_vmstate = {
.name = TYPE_PCIE_PCI_BRIDGE_DEV,
.priority = MIG_PRI_PCI_BUS,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, PCIBridge),
SHPC_VMSTATE(shpc, PCIDevice, NULL),
VMSTATE_END_OF_LIST()
}
};
static void pcie_pci_bridge_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", TYPE_PCIE_PCI_BRIDGE_DEV);
return;
}
shpc_device_plug_cb(hotplug_dev, dev, errp);
}
static void pcie_pci_bridge_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", TYPE_PCIE_PCI_BRIDGE_DEV);
return;
}
shpc_device_unplug_request_cb(hotplug_dev, dev, errp);
}
static void pcie_pci_bridge_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
k->is_bridge = 1;
k->vendor_id = PCI_VENDOR_ID_REDHAT;
k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_BRIDGE;
k->realize = pcie_pci_bridge_realize;
k->exit = pcie_pci_bridge_exit;
k->config_write = pcie_pci_bridge_write_config;
dc->vmsd = &pcie_pci_bridge_dev_vmstate;
dc->props = pcie_pci_bridge_dev_properties;
dc->reset = &pcie_pci_bridge_reset;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
hc->plug = pcie_pci_bridge_plug_cb;
hc->unplug_request = pcie_pci_bridge_unplug_request_cb;
}
static const TypeInfo pcie_pci_bridge_info = {
.name = TYPE_PCIE_PCI_BRIDGE_DEV,
.parent = TYPE_PCI_BRIDGE,
.instance_size = sizeof(PCIEPCIBridge),
.class_init = pcie_pci_bridge_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_HOTPLUG_HANDLER },
{ INTERFACE_PCIE_DEVICE },
{ },
}
};
static void pciepci_register(void)
{
type_register_static(&pcie_pci_bridge_info);
}
type_init(pciepci_register);
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