From a1a667ecf1788ec552a5c5c8f4d83786d764eaa1 Mon Sep 17 00:00:00 2001
From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Thu, 22 Apr 2010 20:25:07 +0000
Subject: [PATCH] Intialize interrupt moderation control register. The magic
 value was chosen by lots of trial and errors. The chosen value shows good
 interrupt moderation without additional latency. Without this change,
 controller can generate more than 140k interrupts per second under high
 network load.

Submitted by:	xclin <xclin <> cs dot nctu dot edu dot tw >
---
 sys/dev/sge/if_sge.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/dev/sge/if_sge.c b/sys/dev/sge/if_sge.c
index c4fb5c9bc8b..6c737bd3f42 100644
--- a/sys/dev/sge/if_sge.c
+++ b/sys/dev/sge/if_sge.c
@@ -1551,10 +1551,13 @@ sge_init_locked(struct sge_softc *sc)
 	/*
 	 * XXX Try to mitigate interrupts.
 	 */
+	CSR_WRITE_4(sc, IntrControl, 0x08880000);
+#ifdef notyet
 	if (sc->sge_intrcontrol != 0)
 		CSR_WRITE_4(sc, IntrControl, sc->sge_intrcontrol);
 	if (sc->sge_intrtimer != 0)
 		CSR_WRITE_4(sc, IntrTimer, sc->sge_intrtimer);
+#endif
 
 	/*
 	 * Clear and enable interrupts.