details: https://anonhg.NetBSD.org/src/rev/2a6182e73fc6
branches: jdolecek-ncq
changeset: 822943:2a6182e73fc6
user: jdolecek <jdolecek%NetBSD.org@localhost>
date: Sat Jun 24 00:00:10 2017 +0000
description:
only limit the openings for I/O xfer if the drive actually supports NCQ; if
it's non-NCQ drive, the tag is not going to be used, so we can use any xfer
diffstat:
sys/dev/ata/TODO.ncq | 3 ---
sys/dev/ata/wd.c | 9 +++++----
2 files changed, 5 insertions(+), 7 deletions(-)
diffs (44 lines):
diff -r 19878bd9007e -r 2a6182e73fc6 sys/dev/ata/TODO.ncq
--- a/sys/dev/ata/TODO.ncq Fri Jun 23 23:49:20 2017 +0000
+++ b/sys/dev/ata/TODO.ncq Sat Jun 24 00:00:10 2017 +0000
@@ -16,9 +16,6 @@
maybe do device error handling in not-interrupt-context (maybe this should be
done on a mpata branch?)
-do not limit openings for xfers for non-NCQ drives in wdstart(), the tag
-will not be used so can use any xfer
-
in atastart(), restrict NCQ commands to commands for the same drive? it's
fine for fis-based switching to have outstanding for several drives, but
not non-FIS
diff -r 19878bd9007e -r 2a6182e73fc6 sys/dev/ata/wd.c
--- a/sys/dev/ata/wd.c Fri Jun 23 23:49:20 2017 +0000
+++ b/sys/dev/ata/wd.c Sat Jun 24 00:00:10 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: wd.c,v 1.428.2.22 2017/06/23 23:45:09 jdolecek Exp $ */
+/* $NetBSD: wd.c,v 1.428.2.23 2017/06/24 00:00:10 jdolecek Exp $ */
/*
* Copyright (c) 1998, 2001 Manuel Bouyer. All rights reserved.
@@ -54,7 +54,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.428.2.22 2017/06/23 23:45:09 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.428.2.23 2017/06/24 00:00:10 jdolecek Exp $");
#include "opt_ata.h"
@@ -659,9 +659,10 @@
goto out;
while (bufq_peek(wd->sc_q) != NULL) {
- /* First try to get command */
+ /* First try to get xfer. Limit to drive openings iff NCQ. */
xfer = ata_get_xfer_ext(wd->drvp->chnl_softc, false,
- wd->drvp->drv_openings);
+ ISSET(wd->drvp->drive_flags, ATA_DRIVE_NCQ)
+ ? wd->drvp->drv_openings : 0);
if (xfer == NULL)
break;