NTSTATUS
NTAPI
PciFdoIrpStartDevice(IN PIRP Irp,
IN PIO_STACK_LOCATION IoStackLocation,
IN PPCI_FDO_EXTENSION DeviceExtension)
{
NTSTATUS Status;
PCM_RESOURCE_LIST Resources;
PAGED_CODE();
/* The device stack must be starting the FDO in a success path */
if (!NT_SUCCESS(Irp->IoStatus.Status)) return STATUS_NOT_SUPPORTED;
/* Attempt to switch the state machine to the started state */
Status = PciBeginStateTransition(DeviceExtension, PciStarted);
if (!NT_SUCCESS(Status)) return Status;
/* Check for any boot-provided resources */
Resources = IoStackLocation->Parameters.StartDevice.AllocatedResources;
if ((Resources) && !(PCI_IS_ROOT_FDO(DeviceExtension)))
{
/* These resources would only be for non-root FDOs, unhandled for now */
ASSERT(Resources->Count == 1);
UNIMPLEMENTED_DBGBREAK();
}
/* Initialize the arbiter for this FDO */
Status = PciInitializeArbiterRanges(DeviceExtension, Resources);
if (!NT_SUCCESS(Status))
{
/* Cancel the transition if this failed */
PciCancelStateTransition(DeviceExtension, PciStarted);
return Status;
}
/* Again, check for boot-provided resources for non-root FDO */
if ((Resources) && !(PCI_IS_ROOT_FDO(DeviceExtension)))
{
/* Unhandled for now */
ASSERT(Resources->Count == 1);
UNIMPLEMENTED_DBGBREAK();
}
/* Commit the transition to the started state */
PciCommitStateTransition(DeviceExtension, PciStarted);
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
PciPdoIrpStartDevice(IN PIRP Irp,
IN PIO_STACK_LOCATION IoStackLocation,
IN PPCI_PDO_EXTENSION DeviceExtension)
{
NTSTATUS Status;
BOOLEAN Changed, DoReset;
POWER_STATE PowerState;
PAGED_CODE();
DoReset = FALSE;
/* Begin entering the start phase */
Status = PciBeginStateTransition((PVOID)DeviceExtension, PciStarted);
if (!NT_SUCCESS(Status)) return Status;
/* Check if this is a VGA device */
if (((DeviceExtension->BaseClass == PCI_CLASS_PRE_20) &&
(DeviceExtension->SubClass == PCI_SUBCLASS_PRE_20_VGA)) ||
((DeviceExtension->BaseClass == PCI_CLASS_DISPLAY_CTLR) &&
(DeviceExtension->SubClass == PCI_SUBCLASS_VID_VGA_CTLR)))
{
/* Always force it on */
DeviceExtension->CommandEnables |= (PCI_ENABLE_IO_SPACE |
PCI_ENABLE_MEMORY_SPACE);
}
/* Check if native IDE is enabled and it owns the I/O ports */
if (DeviceExtension->IoSpaceUnderNativeIdeControl)
{
/* Then don't allow I/O access */
DeviceExtension->CommandEnables &= ~PCI_ENABLE_IO_SPACE;
}
/* Always enable bus mastering */
DeviceExtension->CommandEnables |= PCI_ENABLE_BUS_MASTER;
/* Check if the OS assigned resources differ from the PCI configuration */
Changed = PciComputeNewCurrentSettings(DeviceExtension,
IoStackLocation->Parameters.
StartDevice.AllocatedResources);
if (Changed)
{
/* Remember this for later */
DeviceExtension->MovedDevice = TRUE;
}
else
{
/* All good */
DPRINT1("PCI - START not changing resource settings.\n");
}
/* Check if the device was sleeping */
if (DeviceExtension->PowerState.CurrentDeviceState != PowerDeviceD0)
{
/* Power it up */
Status = PciSetPowerManagedDevicePowerState(DeviceExtension,
PowerDeviceD0,
FALSE);
if (!NT_SUCCESS(Status))
{
/* Powerup fail, fail the request */
PciCancelStateTransition((PVOID)DeviceExtension, PciStarted);
return STATUS_DEVICE_POWER_FAILURE;
}
/* Tell the power manager that the device is powered up */
PowerState.DeviceState = PowerDeviceD0;
PoSetPowerState(DeviceExtension->PhysicalDeviceObject,
DevicePowerState,
PowerState);
/* Update internal state */
DeviceExtension->PowerState.CurrentDeviceState = PowerDeviceD0;
/* This device's resources and decodes will need to be reset */
DoReset = TRUE;
}
/* Update resource information now that the device is powered up and active */
Status = PciSetResources(DeviceExtension, DoReset, TRUE);
if (!NT_SUCCESS(Status))
{
/* That failed, so cancel the transition */
PciCancelStateTransition((PVOID)DeviceExtension, PciStarted);
}
else
{
/* Fully commit, as the device is now started up and ready to go */
PciCommitStateTransition((PVOID)DeviceExtension, PciStarted);
}
/* Return the result of the start request */
return Status;
}