diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2012-02-02 21:21:15 +0000 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2012-02-13 23:40:49 +0000 |
| commit | 5b6262d0ccf759a16fabe11d904a2531125a4b71 (patch) | |
| tree | 812b2cab8bbeb0569909d8646ec864bef11c40c7 /drivers/net/ethernet/sfc/nic.h | |
| parent | fadac6aae1b8d9344beaa18aa9035869d773fd98 (diff) | |
sfc: Replace some literal constants with EFX_PAGE_SIZE/EFX_BUF_SIZE
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>
Diffstat (limited to 'drivers/net/ethernet/sfc/nic.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/nic.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h index 905a1877d60..4f9d18ac92f 100644 --- a/drivers/net/ethernet/sfc/nic.h +++ b/drivers/net/ethernet/sfc/nic.h @@ -65,6 +65,11 @@ enum { #define FALCON_GMAC_LOOPBACKS \ (1 << LOOPBACK_GMAC) +/* Alignment of PCIe DMA boundaries (4KB) */ +#define EFX_PAGE_SIZE 4096 +/* Size and alignment of buffer table entries (same) */ +#define EFX_BUF_SIZE EFX_PAGE_SIZE + /** * struct falcon_board_type - board operations and type information * @id: Board type id, as found in NVRAM |