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authorAlexander Duyck <alexander.h.duyck@intel.com>2017-02-06 18:25:26 -0800
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2017-03-17 12:11:43 -0700
commit7bd175928280c3e5d741cb9948cffaa61b7cc7c6 (patch)
tree2b698687a870115e62e1cf74a553ecb51e397e08 /drivers/net/ethernet/intel/igb
parentliquidio: fix wrong information about link modes reported to ethtool (diff)
downloadlinux-dev-7bd175928280c3e5d741cb9948cffaa61b7cc7c6.tar.xz
linux-dev-7bd175928280c3e5d741cb9948cffaa61b7cc7c6.zip
igb: Add support for DMA_ATTR_WEAK_ORDERING
Since we are already using DMA attributes in igb for Rx there is no reason why we can't also apply DMA_ATTR_WEAK_ORDERING which is needed on some platforms to improve performance. 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')
-rw-r--r--drivers/net/ethernet/intel/igb/igb.h3
-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c6
2 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index acbc3abe2ddd..87c9fe9d6f18 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -148,6 +148,9 @@ struct vf_data_storage {
/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define IGB_RX_BUFFER_WRITE 16 /* Must be power of 2 */
+#define IGB_RX_DMA_ATTR \
+ (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
+
#define AUTO_ALL_MODES 0
#define IGB_EEPROM_APME 0x0400
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index be456bae8169..cf7ee9cdac6f 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3963,7 +3963,7 @@ static void igb_clean_rx_ring(struct igb_ring *rx_ring)
buffer_info->dma,
PAGE_SIZE,
DMA_FROM_DEVICE,
- DMA_ATTR_SKIP_CPU_SYNC);
+ IGB_RX_DMA_ATTR);
__page_frag_cache_drain(buffer_info->page,
buffer_info->pagecnt_bias);
@@ -6990,7 +6990,7 @@ static struct sk_buff *igb_fetch_rx_buffer(struct igb_ring *rx_ring,
*/
dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
PAGE_SIZE, DMA_FROM_DEVICE,
- DMA_ATTR_SKIP_CPU_SYNC);
+ IGB_RX_DMA_ATTR);
__page_frag_cache_drain(page, rx_buffer->pagecnt_bias);
}
@@ -7250,7 +7250,7 @@ static bool igb_alloc_mapped_page(struct igb_ring *rx_ring,
/* map page for use */
dma = dma_map_page_attrs(rx_ring->dev, page, 0, PAGE_SIZE,
- DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC);
+ DMA_FROM_DEVICE, IGB_RX_DMA_ATTR);
/* if mapping failed free memory back to system since
* there isn't much point in holding memory we can't use