
Intel QAT Gen4 devices -- so far to appear with select Sapphire Rapids processors as one of the accelerator options -- support the notion of chained compression "DC" operations. With a single firmware request the chained operations allow for hashing and then compressing the data in one-go.
The Intel QAT Linux kernel driver is being extended to enable the DC chaining service with the latest QAT accelerators. By allowing the single DCC request to hash and then immediately compress the data it sames some overhead and the latency involved in making multiple requests to the QAT hardware.
More details on the QAT DC chaining can be found via