/** private data structure for a QAT compression device.
* This QAT device is a device offering only a compression service,
* there can be one of these on each qat_pci_device (VF).
/** private data structure for a QAT compression device.
* This QAT device is a device offering only a compression service,
* there can be one of these on each qat_pci_device (VF).