From 3e1961268ecf12ff4ba5f522b3d6a8e185bdc1c0 Mon Sep 17 00:00:00 2001
From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Mon, 26 Apr 2010 18:07:55 +0000
Subject: [PATCH] MFC r207071:   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.