On 09/12/2011 10:02 AM, Richard Crewe wrote:
The AHCI spec. seems to indicate that a soft-reset can only be performed
if FBS is disabled.
Can you cite section numbers / specific references for this?
Looking at the LibATA and LibAHCI code at the moment, I can't see where
this is done. The soft-reset happens during error recovery when the port
re-enumerates devices.
Am I missing something or is this a _relatively_ less-well tested area
of the LibATA/AHCI operation?
I cannot see where FBS is disabled for soft-reset, either.
FBS is pretty new, hasn't changed much at all since its initial
implementation on an AMD reference board, and is (obviously) only used
with PMPs. FBS is a pretty small subset of the total AHCI population,
so I doubt the code is exercised heavily except for a very few, large
storage installations.
Jeff
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