e1000e: 82574/82583 performance improvement

Increasing the transmit fifo by 4K (by decreasing the receive fifo size
specified in .pba by the same amount) increases Tx performance.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 6942e2f86eac101c80193cfa79597c8c5bf2adde..280d41fc2a2d2d859b54e4e1e92872265c0a4347 100644 (file)
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -2005,7 +2005,7 @@ struct e1000_info e1000_82574_info = {
                                  | FLAG_HAS_AMT
                                  | FLAG_HAS_CTRLEXT_ON_LOAD,
        .flags2                   = FLAG2_CHECK_PHY_HANG,
-       .pba                    = 36,
+       .pba                    = 32,
        .max_hw_frame_size      = DEFAULT_JUMBO,
        .get_variants           = e1000_get_variants_82571,
        .mac_ops                = &e82571_mac_ops,
@@ -2022,7 +2022,7 @@ struct e1000_info e1000_82583_info = {
                                  | FLAG_HAS_SMART_POWER_DOWN
                                  | FLAG_HAS_AMT
                                  | FLAG_HAS_CTRLEXT_ON_LOAD,
-       .pba                    = 36,
+       .pba                    = 32,
        .max_hw_frame_size      = ETH_FRAME_LEN + ETH_FCS_LEN,
        .get_variants           = e1000_get_variants_82571,
        .mac_ops                = &e82571_mac_ops,