From owner-svn-src-stable-6@FreeBSD.ORG  Wed Jan 14 21:08:43 2009
Return-Path: <owner-svn-src-stable-6@FreeBSD.ORG>
Delivered-To: svn-src-stable-6@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id CAEF51065754;
	Wed, 14 Jan 2009 21:08:43 +0000 (UTC)
	(envelope-from marius@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id B8CB98FC2E;
	Wed, 14 Jan 2009 21:08:43 +0000 (UTC)
	(envelope-from marius@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n0EL8hOS054013;
	Wed, 14 Jan 2009 21:08:43 GMT (envelope-from marius@svn.freebsd.org)
Received: (from marius@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n0EL8hZj054012;
	Wed, 14 Jan 2009 21:08:43 GMT (envelope-from marius@svn.freebsd.org)
Message-Id: <200901142108.n0EL8hZj054012@svn.freebsd.org>
From: Marius Strobl <marius@FreeBSD.org>
Date: Wed, 14 Jan 2009 21:08:43 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-6@freebsd.org
X-SVN-Group: stable-6
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r187242 - in stable/6/sys: . dev/dcons
X-BeenThere: svn-src-stable-6@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for only the 6-stable src tree
	<svn-src-stable-6.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-6>, 
	<mailto:svn-src-stable-6-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable-6>
List-Post: <mailto:svn-src-stable-6@freebsd.org>
List-Help: <mailto:svn-src-stable-6-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-6>, 
	<mailto:svn-src-stable-6-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 14 Jan 2009 21:08:45 -0000

Author: marius
Date: Wed Jan 14 21:08:43 2009
New Revision: 187242
URL: http://svn.freebsd.org/changeset/base/187242

Log:
  MFC: r185108
  
  Given that the buffer dcons_crom(4) exposes is used for both input
  and output, set BUS_DMA_COHERENT when creating the DMA map used for
  loading the buffer. As a side-effect this solves locking issues on
  sparc64 when dcons(4) calls bus_dmamap_sync(9) while in an interrupt
  filter, which are executed in a critical section, and iommu(4) has
  to use a sleep lock when taking advantage of the streaming buffer.
  
  Reported and tested by:	kensmith
  Approved by:		simokawa

Modified:
  stable/6/sys/   (props changed)
  stable/6/sys/dev/dcons/dcons_crom.c

Modified: stable/6/sys/dev/dcons/dcons_crom.c
==============================================================================
--- stable/6/sys/dev/dcons/dcons_crom.c	Wed Jan 14 21:08:19 2009	(r187241)
+++ stable/6/sys/dev/dcons/dcons_crom.c	Wed Jan 14 21:08:43 2009	(r187242)
@@ -196,7 +196,7 @@ dcons_crom_attach(device_t dev)
 		/*lockarg*/&Giant,
 #endif
 		&sc->dma_tag);
-	bus_dmamap_create(sc->dma_tag, 0, &sc->dma_map);
+	bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
 	bus_dmamap_load(sc->dma_tag, sc->dma_map,
 	    (void *)dcons_conf->buf, dcons_conf->size,
 	    dmamap_cb, sc, 0);