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From: Alexander Motin <mav@FreeBSD.org>
Date: Sat, 5 Sep 2009 06:24:29 +0000 (UTC)
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Subject: svn commit: r196854 - in stable/8/sys: . amd64/include/xen
	cddl/contrib/opensolaris contrib/dev/acpica contrib/pf
	dev/ahci dev/xen/xenpci
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Author: mav
Date: Sat Sep  5 06:24:28 2009
New Revision: 196854
URL: http://svn.freebsd.org/changeset/base/196854

Log:
  MFC r196777, r196796:
  ATI SB600 can't handle 256 sectors transfers with FPDMA (NCQ).
  
  Approved by:	re (ATA-CAM blanket)

Modified:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/ahci/ahci.c
  stable/8/sys/dev/xen/xenpci/   (props changed)

Modified: stable/8/sys/dev/ahci/ahci.c
==============================================================================
--- stable/8/sys/dev/ahci/ahci.c	Sat Sep  5 05:57:44 2009	(r196853)
+++ stable/8/sys/dev/ahci/ahci.c	Sat Sep  5 06:24:28 2009	(r196854)
@@ -1942,6 +1942,9 @@ ahciaction(struct cam_sim *sim, union cc
 		cpi->protocol = PROTO_ATA;
 		cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
 		cpi->maxio = MAXPHYS;
+		/* ATI SB600 can't handle 256 sectors with FPDMA (NCQ). */
+		if (pci_get_devid(device_get_parent(dev)) == 0x43801002)
+			cpi->maxio = min(cpi->maxio, 128 * 512);
 		cpi->ccb_h.status = CAM_REQ_CMP;
 		xpt_done(ccb);
 		break;