IOCTL_INTERNAL_USB_SUBMIT_IDLE_NOTIFICATION IOCTL (usbioctl.h)

Artikel
02/22/2024

The IOCTL_INTERNAL_USB_SUBMIT_IDLE_NOTIFICATION I/O request is used by drivers to inform the USB bus driver that a device is idle and can be suspended.

When sending this IOCTL, caller must furnish a callback routine that does the actual suspension of the device. The USB bus driver will call this routine at PASSIVE_LEVEL when it is safe for the device to be powered down. If the device supports remote wake up and has no Wait/Wake IRP already pending, the callback routine should submit a Wait/Wake IRP to the bus driver for the device, before powering it down.

For additional information, see Supporting Devices that Have Wake-Up Capabilities and USB Selective Suspend.

IOCTL_INTERNAL_USB_SUBMIT_IDLE_NOTIFICATION is a kernel-mode I/O control request. This request targets the USB hub PDO. This request must be sent at an IRQL of PASSIVE_LEVEL.

Major code

IRP_MJ_INTERNAL_DEVICE_CONTROL

Input buffer

Parameters.DeviceIoControl.Type3InputBuffer should be a pointer to a USB_IDLE_CALLBACK_INFO structure. This structure should contain a pointer to the callback routine and a pointer to the callback routine context.

The structure holding the callback information is defined in usbioctl.h as follows:

typedef VOID (*USB_IDLE_CALLBACK)(PVOID Context);

typedef struct _USB_IDLE_CALLBACK_INFO
{
  USB_IDLE_CALLBACK IdleCallback;
  PVOID IdleContext;
} USB_IDLE_CALLBACK_INFO, *PUSB_IDLE_CALLBACK_INFO;

Input buffer length

The size of a USB_IDLE_CALLBACK_INFO structure.

Output buffer

None.

Output buffer length

None.

Status block

The bus or port driver sets Irp->IoStatus.Status to STATUS_SUCCESS or the appropriate error status.

Requirements

Requirement	Value
Header	usbioctl.h (include Usbioctl.h)

Delen via