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For NCQ, PxCI is cleared on command queued successfully. For non-NCQ, PxCI is cleared on command completed successfully. Successfully means ERR_STAT, BUSY and DRQ are all cleared. A command that has ERR_STAT set, does not get to clear PxCI. See AHCI 1.3.1, section 5.3.8, states RegFIS:Entry and RegFIS:ClearCI, and 5.3.16.5 ERR:FatalTaskfile. In the case of non-NCQ commands, not clearing PxCI is needed in order for host software to be able to see which command slot that failed. Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> Message-id: 20230609140844.202795-7-nks@flawful.org Signed-off-by: John Snow <jsnow@redhat.com> |
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.. | ||
ahci-allwinner.c | ||
ahci.c | ||
ahci_internal.h | ||
atapi.c | ||
cmd646.c | ||
core.c | ||
ich.c | ||
ioport.c | ||
isa.c | ||
Kconfig | ||
macio.c | ||
meson.build | ||
microdrive.c | ||
mmio.c | ||
pci.c | ||
piix.c | ||
qdev.c | ||
sii3112.c | ||
trace-events | ||
trace.h | ||
via.c |