diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2012-09-17 21:56:27 -0400 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-09-22 06:18:20 -0400 |
| commit | c9f14bf3a49f86e6402a6e3476a180f2bdc8a71b (patch) | |
| tree | e9bf482bcbdffcd74fb0cc41b270cbc9ca4deb04 /drivers/net/ethernet/intel/igb/igb.h | |
| parent | a57fe23e240b95282e60d643cd8ada3d2a66d8c6 (diff) | |
igb: Use dma_unmap_addr and dma_unmap_len defines
This change is meant to improve performance on systems that do not require
the DMA unmap calls. On those systems we do not need to make use of the
unmap address for Tx or the unmap length so we can drop both thereby
reducing the size of the Tx buffer info structure.
In addition I have changed the logic to check for unmap length instead of
unmap address when checking to see if a buffer needs to be unmapped from
DMA use. The reasons for this change is that on some platforms it is
possible to receive a valid DMA address of 0 from an IOMMU.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb.h')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index 9cad05894193..8aad230c0592 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h | |||
| @@ -168,8 +168,8 @@ struct igb_tx_buffer { | |||
| 168 | unsigned int bytecount; | 168 | unsigned int bytecount; |
| 169 | u16 gso_segs; | 169 | u16 gso_segs; |
| 170 | __be16 protocol; | 170 | __be16 protocol; |
| 171 | dma_addr_t dma; | 171 | DEFINE_DMA_UNMAP_ADDR(dma); |
| 172 | u32 length; | 172 | DEFINE_DMA_UNMAP_LEN(len); |
| 173 | u32 tx_flags; | 173 | u32 tx_flags; |
| 174 | }; | 174 | }; |
| 175 | 175 | ||