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That is HP's "hpsa" driver: https://sourceforge.net/projects/cciss/files/hpsa-3.0-tarballs/ The version in Linux kernel 4.19 is "3.4.20-125". You can see from above link that there are newer hpsa versions, but those drivers are designed to be built/integrated into RedHat variation of the kernel and do not build with our kernel. Checking kernel 5.0 and 5.1, reveals they all also use hpsa driver "3.4.20-125". Why hardware vendors insist to maintain their own driver vs. the stock kernel driver is a mystery. Eventually someone who HP cares about will complain and they'll update the stock kernel driver.