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authorDivy Le Ray <divy@chelsio.com>2009-03-26 16:39:29 +0000
committerDavid S. Miller <davem@davemloft.net>2009-03-27 00:46:59 -0700
commit5e68b772e6efd189d6aca76f6872fb75d51ace60 (patch)
tree88a988918d021d397756790d89c8801adb131195 /Documentation/pcmcia/devicetable.txt
parent952cdf333f9d1b0b71f1b9a3c5e421a2673ed7de (diff)
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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>
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