sfc: Replace some literal constants with EFX_PAGE_SIZE/EFX_BUF_SIZE

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The 'page size' for PCIe DMA, i.e. the alignment of boundaries at
which DMA must be broken, is 4KB.  Name this value as EFX_PAGE_SIZE
and use it in efx_max_tx_len().  Redefine EFX_BUF_SIZE as
EFX_PAGE_SIZE since its value is also a result of that requirement,
and use it in efx_init_special_buffer().

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

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This commit is contained in:

Ben Hutchings 2012-02-02 21:21:15 +00:00

parent fadac6aae1

commit 5b6262d0cc

3 changed files with 7 additions and 5 deletions

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5

drivers/net/ethernet/sfc/nic.c

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5

drivers/net/ethernet/sfc/nic.h

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2

drivers/net/ethernet/sfc/tx.c

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