[src/trunk]: src/sys/dev/pci radeonfb: use BUS_SPACE_MAP_PREFETCHABLE for the...

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

details:   https://anonhg.NetBSD.org/src/rev/511c66ba5ef8
branches:  trunk
changeset: 1022815:511c66ba5ef8
user:      tnn <tnn%NetBSD.org@localhost>
date:      Sun Aug 08 12:17:37 2021 +0000

description:
radeonfb: use BUS_SPACE_MAP_PREFETCHABLE for the framebuffer mapping

Makes the driver work on cia(4) based alpha machines, which can only
do dense access to linear mappings with prefetch. ok macallan@

diffstat:

 sys/dev/pci/radeonfb.c |  10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diffs (38 lines):

diff -r d148dc967131 -r 511c66ba5ef8 sys/dev/pci/radeonfb.c
--- a/sys/dev/pci/radeonfb.c    Sun Aug 08 12:09:52 2021 +0000
+++ b/sys/dev/pci/radeonfb.c    Sun Aug 08 12:17:37 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: radeonfb.c,v 1.116 2021/08/07 16:19:14 thorpej Exp $ */
+/*     $NetBSD: radeonfb.c,v 1.117 2021/08/08 12:17:37 tnn Exp $ */
 
 /*-
  * Copyright (c) 2006 Itronix Inc.
@@ -70,7 +70,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: radeonfb.c,v 1.116 2021/08/07 16:19:14 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: radeonfb.c,v 1.117 2021/08/08 12:17:37 tnn Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -799,7 +799,8 @@
 
        sc->sc_memt = pa->pa_memt;
        if (bus_space_map(sc->sc_memt, sc->sc_memaddr, sc->sc_memsz,
-               BUS_SPACE_MAP_LINEAR, &sc->sc_memh) != 0) {
+               BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE,
+               &sc->sc_memh) != 0) {
                sc->sc_memsz = 0;
                aprint_error("%s: Unable to map frame buffer\n", XNAME(sc));
                goto error;
@@ -1098,7 +1099,8 @@
                        return;
                }
                if (bus_space_map(sc->sc_memt, sc->sc_memaddr, sc->sc_memsz,
-                   BUS_SPACE_MAP_LINEAR, &sc->sc_memh) != 0) {
+                   BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE,
+                   &sc->sc_memh) != 0) {
                        sc->sc_memsz = 0;
                        aprint_error_dev(sc->sc_dev,
                            "Unable to map frame buffer\n");