Unless you're pushing a ton of extra work into a network-capable accelerator, that sounds exactly like what you'd want for, e.g., an encrypted S3 implementation

Unless you're pushing a ton of extra work into a network-capable accelerator, that sounds exactly like what you'd want for, e.g., an encrypted S3 implementation. You have encryption, RS encoding, striped checksumming, sending fragments to multiple hosts, some sort of potentially interesting partial failure handling, etc. You could push that all down to the accelerator, but if there are even a few such use cases you might want a dedicated DMA-capable implementation instead.