Hi there,
Here are some questions about SCSI HBA driver. Hopefully some experts can
answer that since
I've got stuck for a week without any progress
This SCSI HBA driver is for IOP based HBA. The driver will just pass SCSI
command to
IOP and then get status back from interrupt when it is done. During
debugging I found
Several issues
(1) Will DDI_ATTACH get timeout? I found DDI_ATTACH keep coming when my
current DDI_ATTACH
is still running initialization. How to prevent that? And if I have
multiple HBAs at the
same time, what will be the behavior?
(2) During ddi_tran_tgt_init(), I saw a sequence of calling target_id=0 ..
15 then again
Target_id=0 ..15, then target_id=0..7 then target_id=0..7. Is it
correct?
(3) Since our IOP will handle all commands physically, the HBA just programs
DMA handle for
every command. In ddi_tran_init_pkt(), HBA does
ddi_dma_alloc_handle(),and
ddi_dma_buf_bind_handle() to get DMA physical address, dma size. Hence
in ddi_tran_start(),
will fill in this dma_cookie pointer content to mailbox. Do I process it
correctly?
Later the command is done and return "good" status on SCSI Identify
command. But I keep
seeing kernel send SCSI identify for this target again. This confuses me
and it seems the
kernel is not receiving the data.
Can any expert help?
Thanks
Steve Chang
HighPoint Technologies, Inc.
408-240-6115
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