Mark Lord wrote:
Morrison, Tom wrote:
I am hopeful that the sata_mv has this bug (I proved that the
problem I was experiencing was due to the sata_mv driver with 3.75Gig
or more of memory)...
I am on vacation for a week or more ...or I'd tell you today
if it did have this bug!
..
Yeah, I kind of had your reports in mind when I asked that. :)
On a related note, I now have lots of Marvell (sata_mv) hardware here,
and an Intel CPU/chipset box with physical RAM above the 4GB boundary.
Based on a quick look at sata_mv it appears it sets a 64-bit DMA mask
unconditionally, but for non-ATA_PROT_DMA commands (which includes all
ATAPI), it just falls back to ata_qc_issue_prot which issues via the
legacy SFF interface and can only handle 32-bit addressing. So yes, it
appears to have a similar bug as sata_nv had.
Likely it needs a similar slave_config trick to change bounce limit
depending on the connected device, unless there is really a way to issue
ATAPI commands with this EDMA interface, as the TODO list in sata_mv.c
suggests may be possible..
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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