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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Tue, 4 Jan 2011 20:06:26 +0000 (UTC)
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Subject: svn commit: r216973 - head/sys/dev/bge
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Author: yongari
Date: Tue Jan  4 20:06:26 2011
New Revision: 216973
URL: http://svn.freebsd.org/changeset/base/216973

Log:
  Limit hardware bug workaround to controllers that have 4GB boundary
  bug instead of blindly applying it to all controllers.
  
  Pointed out by:	marius
  MFC after:	3 days

Modified:
  head/sys/dev/bge/if_bge.c

Modified: head/sys/dev/bge/if_bge.c
==============================================================================
--- head/sys/dev/bge/if_bge.c	Tue Jan  4 19:32:03 2011	(r216972)
+++ head/sys/dev/bge/if_bge.c	Tue Jan  4 20:06:26 2011	(r216973)
@@ -2482,8 +2482,11 @@ bge_dma_alloc(struct bge_softc *sc)
 	 * restriction and limit DMA address space to 32bit.  It's not
 	 * clear whether there is another hardware issue here.
 	 */
+	lowaddr = BUS_SPACE_MAXADDR;
+	if ((sc->bge_flags & BGE_FLAG_40BIT_BUG) != 0)
+		lowaddr = BUS_SPACE_MAXADDR_32BIT;
 	error = bus_dma_tag_create(bus_get_dma_tag(sc->bge_dev),
-	    1, 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL,
+	    1, 0, lowaddr, BUS_SPACE_MAXADDR, NULL,
 	    NULL, BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT,
 	    0, NULL, NULL, &sc->bge_cdata.bge_buffer_tag);
 	if (error != 0) {