[v1] esp-scsi: fix reliance on QEMU ESP SCSI implementation bugs

[SeaBIOS] [PATCH 0/2] esp-scsi: fix reliance on QEMU ESP SCSI implementation bugs

Mark Cave-Ayland posted 2 patches 9 months ago

Diff against v2 v3
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/seabios tags/patchew/20230729130441.109516-1-mark.cave-ayland@ilande.co.uk

There is a newer version of this series

src/hw/esp-scsi.c | 38 +++++++++++++++++++++++++-------------
1 file changed, 25 insertions(+), 13 deletions(-)

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[SeaBIOS] [PATCH 0/2] esp-scsi: fix reliance on QEMU ESP SCSI implementation bugs

Posted by Mark Cave-Ayland 9 months ago

Whilst trying to improve QEMU's ESP SCSI implementation with regard to the
NCR datasheet, I noticed that SeaBIOS would fail to boot one of my Debian
test images with my patches applied.

Further investigation revealed that the SeaBIOS esp-scsi driver inadvertently
relies on existing bugs in QEMU's ESP SCSI emulation to work correctly, so this
series changes the driver to work as described in the NCR datasheet.

With this series applied it is possible for the updated SeaBIOS to boot both
QEMU current git HEAD as well as my local WIP branch containing various fixes
and improvements to QEMU's ESP SCSI emulation.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>


Mark Cave-Ayland (2):
  esp-scsi: flush FIFO before sending SCSI command
  esp-scsi: check for INTR_BS/INTR_FC instead of STAT_TC for command
    completion

 src/hw/esp-scsi.c | 38 +++++++++++++++++++++++++-------------
 1 file changed, 25 insertions(+), 13 deletions(-)

-- 
2.30.2

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