e1000e: 82579 performance improvements

The initial support for 82579 was tuned poorly for performance.  Adjust the
packet buffer allocation appropriately for both standard and jumbo frames;
and for jumbo frames increase the receive descriptor pre-fetch, disable
adaptive interrupt moderation and set the DMA latency tolerance.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 57b5435599ab..e3374d9a2472 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -3986,7 +3986,7 @@ struct e1000_info e1000_pch2_info = {
                                   | FLAG_APME_IN_WUC,
         .flags2                 = FLAG2_HAS_PHY_STATS
                                   | FLAG2_HAS_EEE,
-        .pba                    = 18,
+        .pba                    = 26,
         .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_ich8lan,
         .mac_ops                = &ich8_mac_ops,