I was able to update the firmware on mine under windows. Though for some reason, firmware update worked without card being completely reset. I am not sure how this worked.
Here is direct link for the package; since doing the right search on broadcom website is PITA:
docs.broadcom.com
Firmware update is a must because the bios on the card is super slow, 2+ minutes on each boot. I also noticed original firmware has limitations like it doesn't support host managed smr.
Here is the result of my firmware update:
Avago Technologies SAS3 Flash Utility
Version 17.00.00.00 (2018.04.02)
Copyright 2008-2018 Avago Technologies. All rights reserved.
Adapter Selected is a Avago SAS: SAS3008(C0)
Controller Number : 0
Controller : SAS3008(C0)
PCI Address : 00:02:00:00
NVDATA Version (Default) : 0e.01.00.07
NVDATA Version (Persistent) : 0e.01.00.07
Firmware Product ID : 0x2221 (IT)
Firmware Version : 16.00.10.00
NVDATA Vendor : LSI
NVDATA Product ID : SAS9300-8i
BIOS Version : 08.37.00.00
UEFI BSD Version : 18.00.00.00
FCODE Version : N/A
Board Name : INSPUR 3008IT
Board Assembly : INSPUR
Board Tracer Number : N/A
Finished Processing Commands Successfully.
Exiting SAS3Flash.