From: Auke Kok <auke\-jan.h.kok@intel.com>
Date: Wed, 1 Nov 2006 16:47:39 +0000 (-0800)
Subject: e1000: Enble early receive (ERT) on 82573
X-Git-Tag: v2.6.20-rc1~34^2~40^2~463^2~86
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=21c4d5e07859a6fc0f62be37da15b161e142c8d1;p=linux-2.6

e1000: Enble early receive (ERT) on 82573

Enable early receives on 82573 for jumbo frame performance. Jumbo's
are only supported on 82573L with ASPM disabled.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
---

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 38ee39e570..93b97c6b8a 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1934,6 +1934,12 @@ e1000_configure_rx(struct e1000_adapter *adapter)
 		E1000_WRITE_REG(hw, RXCSUM, rxcsum);
 	}
 
+	/* enable early receives on 82573, only takes effect if using > 2048
+	 * byte total frame size.  for example only for jumbo frames */
+#define E1000_ERT_2048 0x100
+	if (hw->mac_type == e1000_82573)
+		E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
+
 	/* Enable Receives */
 	E1000_WRITE_REG(hw, RCTL, rctl);
 }