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| author | Divy Le Ray <divy@chelsio.com> | 2009-03-26 16:39:29 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-27 00:46:59 -0700 |
| commit | 5e68b772e6efd189d6aca76f6872fb75d51ace60 (patch) | |
| tree | 88a988918d021d397756790d89c8801adb131195 /mm/pdflush.c | |
| parent | 952cdf333f9d1b0b71f1b9a3c5e421a2673ed7de (diff) | |
| download | blackbird-op-linux-5e68b772e6efd189d6aca76f6872fb75d51ace60.tar.gz blackbird-op-linux-5e68b772e6efd189d6aca76f6872fb75d51ace60.zip | |
cxgb3: map entire Rx page, feed map+offset to Rx ring.
DMA mapping can be expensive in the presence of iommus.
Reduce the Rx iommu activity by mapping an entire page, and provide the H/W
the mapped address + offset of the current page chunk.
Reserve bits at the end of the page to track mapping references, so the page
can be unmapped.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm/pdflush.c')
0 files changed, 0 insertions, 0 deletions
