From owner-p4-projects@FreeBSD.ORG  Wed Dec  9 11:21:01 2009
Return-Path: <owner-p4-projects@FreeBSD.ORG>
Delivered-To: p4-projects@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 32767)
	id 41A201065695; Wed,  9 Dec 2009 11:21:01 +0000 (UTC)
Delivered-To: perforce@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 063911065693
	for <perforce@freebsd.org>; Wed,  9 Dec 2009 11:21:01 +0000 (UTC)
	(envelope-from mav@freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id E848A8FC0A
	for <perforce@freebsd.org>; Wed,  9 Dec 2009 11:21:00 +0000 (UTC)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id nB9BL0Ht082786
	for <perforce@freebsd.org>; Wed, 9 Dec 2009 11:21:00 GMT
	(envelope-from mav@freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.14.3/8.14.3/Submit) id nB9BL0Rn082784
	for perforce@freebsd.org; Wed, 9 Dec 2009 11:21:00 GMT
	(envelope-from mav@freebsd.org)
Date: Wed, 9 Dec 2009 11:21:00 GMT
Message-Id: <200912091121.nB9BL0Rn082784@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	mav@freebsd.org using -f
From: Alexander Motin <mav@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Precedence: bulk
Cc: 
Subject: PERFORCE change 171561 for review
X-BeenThere: p4-projects@freebsd.org
X-Mailman-Version: 2.1.5
List-Id: p4 projects tree changes <p4-projects.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/p4-projects>
List-Post: <mailto:p4-projects@freebsd.org>
List-Help: <mailto:p4-projects-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 09 Dec 2009 11:21:01 -0000

http://p4web.freebsd.org/chv.cgi?CH=171561

Change 171561 by mav@mav_mavtest on 2009/12/09 11:20:05

	Increase Max Read Request Size for PCIe chips to 1024 bytes.
	It gives those slow beasts additional 10% of write bandwidth.

Affected files ...

.. //depot/projects/scottl-camlock/src/sys/dev/siis/siis.c#30 edit

Differences ...

==== //depot/projects/scottl-camlock/src/sys/dev/siis/siis.c#30 (text+ko) ====

@@ -231,7 +231,20 @@
 siis_resume(device_t dev)
 {
 	struct siis_controller *ctlr = device_get_softc(dev);
+	int cap;
+	uint16_t val;
 
+	/* Set PCIe max read request size to at least 1024 bytes */
+	if (pci_find_extcap(dev, PCIY_EXPRESS, &cap) == 0) {
+		val = pci_read_config(dev,
+		    cap + PCIR_EXPRESS_DEVICE_CTL, 2);
+		if ((val & PCIM_EXP_CTL_MAX_READ_REQUEST) < 0x3000) {
+			val &= ~PCIM_EXP_CTL_MAX_READ_REQUEST;
+			val |= 0x3000;
+			pci_write_config(dev,
+			    cap + PCIR_EXPRESS_DEVICE_CTL, val, 2);
+		}
+	}
 	/* Put controller into reset state. */
 	ctlr->gctl |= SIIS_GCTL_GRESET;
 	ATA_OUTL(ctlr->r_gmem, SIIS_GCTL, ctlr->gctl);