static int pci_bridge_dev_initfn(PCIDevice *dev)
{
PCIBridge *br = PCI_BRIDGE(dev);
PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
int err;
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);
if (err) {
goto shpc_error;
}
} else {
/* MSI is not applicable without SHPC */
bridge_dev->flags &= ~(1 << PCI_BRIDGE_DEV_F_MSI_REQ);
}
err = slotid_cap_init(dev, 0, bridge_dev->chassis_nr, 0);
if (err) {
goto slotid_error;
}
if ((bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_MSI_REQ)) &&
msi_supported) {
err = msi_init(dev, 0, 1, true, true);
if (err < 0) {
goto msi_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 0;
msi_error:
slotid_cap_cleanup(dev);
slotid_error:
if (shpc_present(dev)) {
shpc_cleanup(dev, &bridge_dev->bar);
}
shpc_error:
pci_bridge_exitfn(dev);
return err;
}
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 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 pci_bridge_dev_hotplug_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_PCI_BRIDGE_DEV);
return;
}
shpc_device_hotplug_cb(hotplug_dev, dev, errp);
}
static void pci_bridge_dev_exitfn(PCIDevice *dev)
{
PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
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_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);
}
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;
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 bool pci_device_shpc_present(void *opaque, int version_id)
{
PCIDevice *dev = opaque;
return shpc_present(dev);
}