[src/trunk]: src/sys/arch/arm/arm32 Update stats in the coherent case. Repor...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/07531d81586b
branches:  trunk
changeset: 957560:07531d81586b
user:      skrll <skrll%NetBSD.org@localhost>
date:      Fri Dec 04 07:11:35 2020 +0000

description:
Update stats in the coherent case.  Reported by jmcneill.

diffstat:

 sys/arch/arm/arm32/bus_dma.c |  27 +++++++++++++++++++++++++--
 1 files changed, 25 insertions(+), 2 deletions(-)

diffs (48 lines):

diff -r 55cce0551a2a -r 07531d81586b sys/arch/arm/arm32/bus_dma.c
--- a/sys/arch/arm/arm32/bus_dma.c      Fri Dec 04 00:44:39 2020 +0000
+++ b/sys/arch/arm/arm32/bus_dma.c      Fri Dec 04 07:11:35 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma.c,v 1.124 2020/10/24 14:51:59 skrll Exp $      */
+/*     $NetBSD: bus_dma.c,v 1.125 2020/12/04 07:11:35 skrll Exp $      */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2020 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
 #include "opt_cputypes.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.124 2020/10/24 14:51:59 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.125 2020/12/04 07:11:35 skrll Exp $");
 
 #include <sys/param.h>
 
@@ -1135,6 +1135,29 @@
 
        /* Skip cache frobbing if mapping was COHERENT */
        if ((map->_dm_flags & _BUS_DMAMAP_COHERENT)) {
+               switch (ops) {
+               case BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE:
+                       STAT_INCR(sync_prereadwrite);
+                       break;
+
+               case BUS_DMASYNC_PREREAD:
+                       STAT_INCR(sync_preread);
+                       break;
+
+               case BUS_DMASYNC_PREWRITE:
+                       STAT_INCR(sync_prewrite);
+                       break;
+
+               case BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE:
+                       STAT_INCR(sync_postreadwrite);
+                       break;
+
+               case BUS_DMASYNC_POSTREAD:
+                       STAT_INCR(sync_postread);
+                       break;
+
+               /* BUS_DMASYNC_POSTWRITE was aleady handled as a fastpath */
+               }
                /*
                 * Drain the write buffer of DMA operators.
                 * 1) when cpu->device (prewrite)