sfc: Fix efx_rx_buf_offset() in the presence of swiotlb

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We assume that the mapping between DMA and virtual addresses is done
on whole pages, so we can find the page offset of an RX buffer using
the lower bits of the DMA address.  However, swiotlb maps in units of
2K, breaking this assumption.

Add an explicit page_offset field to struct efx_rx_buffer.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

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This commit is contained in:

Ben Hutchings 2013-01-10 23:51:54 +00:00

parent 3a68f19d7a

commit b590ace09d

2 changed files with 8 additions and 6 deletions

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4

drivers/net/ethernet/sfc/net_driver.h

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10

drivers/net/ethernet/sfc/rx.c

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