[src/trunk]: src/sys/external/bsd/drm2/dist/drm/amd/amdgpu amdgpu: Make sure ...

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

details:   https://anonhg.NetBSD.org/src/rev/b59766749368
branches:  trunk
changeset: 368726:b59766749368
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sat Jul 30 17:12:39 2022 +0000

description:
amdgpu: Make sure to bus_dmamap_sync before using zero'd dummy page.

diffstat:

 sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_gart.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r cc228045c2d3 -r b59766749368 sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_gart.c
--- a/sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_gart.c   Sat Jul 30 16:55:00 2022 +0000
+++ b/sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_gart.c   Sat Jul 30 17:12:39 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: amdgpu_gart.c,v 1.9 2022/07/30 16:55:00 riastradh Exp $        */
+/*     $NetBSD: amdgpu_gart.c,v 1.10 2022/07/30 17:12:39 riastradh Exp $       */
 
 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
@@ -29,7 +29,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: amdgpu_gart.c,v 1.9 2022/07/30 16:55:00 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: amdgpu_gart.c,v 1.10 2022/07/30 17:12:39 riastradh Exp $");
 
 #include <linux/pci.h>
 #include <linux/vmalloc.h>
@@ -105,6 +105,9 @@
        if (error)
                goto fail2;
 
+       bus_dmamap_sync(adev->ddev->dmat, adev->dummy_page_map, 0, PAGE_SIZE,
+           BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
+
        /* Success!  */
        adev->dummy_page_addr = adev->dummy_page_map->dm_segs[0].ds_addr;
        return 0;