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authorJesse Brandeburg <jesse.brandeburg@intel.com>2010-09-29 21:38:49 +0000
committerDavid S. Miller <davem@davemloft.net>2010-09-30 17:59:31 -0700
commit3a3b75860527a11ba5035c6aa576079245d09e2a (patch)
tree0dbd487fe8910a02c39ab4f84da6d16ebe6d29e3 /drivers/net/e1000e/es2lan.c
parent6af3b9ebfea38d0a057fbd7bdcecc61ac5662f02 (diff)
e1000e: use hardware writeback batching
Most e1000e parts support batching writebacks. The problem with this is that when some of the TADV or TIDV timers are not set, Tx can sit forever. This is solved in this patch with write flushes using the Flush Partial Descriptors (FPD) bit in TIDV and RDTR. This improves bus utilization and removes partial writes on e1000e, particularly from 82571 parts in S5500 chipset based machines. Only ES2LAN and 82571/2 parts are included in this optimization, to reduce testing load. Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Emil Tantilov <emil.s.tantilov@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/e1000e/es2lan.c')
-rw-r--r--drivers/net/e1000e/es2lan.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/e1000e/es2lan.c b/drivers/net/e1000e/es2lan.c
index 45aebb4a6fe..24f8ac9cf70 100644
--- a/drivers/net/e1000e/es2lan.c
+++ b/drivers/net/e1000e/es2lan.c
@@ -1494,6 +1494,7 @@ struct e1000_info e1000_es2_info = {
| FLAG_APME_CHECK_PORT_B
| FLAG_DISABLE_FC_PAUSE_TIME /* errata */
| FLAG_TIPG_MEDIUM_FOR_80003ESLAN,
+ .flags2 = FLAG2_DMA_BURST,
.pba = 38,
.max_hw_frame_size = DEFAULT_JUMBO,
.get_variants = e1000_get_variants_80003es2lan,