[src/trunk]: src/sys/external/bsd/drm2/dist/drm/radeon Zero the dummy page

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

details:   https://anonhg.NetBSD.org/src/rev/d87fcc3bbbc6
branches:  trunk
changeset: 744177:d87fcc3bbbc6
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Jan 26 14:36:35 2020 +0000

description:
Zero the dummy page

diffstat:

 sys/external/bsd/drm2/dist/drm/radeon/radeon.h        |   3 +-
 sys/external/bsd/drm2/dist/drm/radeon/radeon_device.c |  21 ++++++++++++++----
 2 files changed, 18 insertions(+), 6 deletions(-)

diffs (76 lines):

diff -r 1f6b36a8cfe6 -r d87fcc3bbbc6 sys/external/bsd/drm2/dist/drm/radeon/radeon.h
--- a/sys/external/bsd/drm2/dist/drm/radeon/radeon.h    Sun Jan 26 10:13:10 2020 +0000
+++ b/sys/external/bsd/drm2/dist/drm/radeon/radeon.h    Sun Jan 26 14:36:35 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: radeon.h,v 1.6 2018/08/27 06:38:51 riastradh Exp $     */
+/*     $NetBSD: radeon.h,v 1.7 2020/01/26 14:36:35 jmcneill Exp $      */
 
 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
@@ -259,6 +259,7 @@
 #ifdef __NetBSD__
        bus_dma_segment_t       rdp_seg;
        bus_dmamap_t            rdp_map;
+       void            *rdp_addr;
 #else
        struct page     *page;
 #endif
diff -r 1f6b36a8cfe6 -r d87fcc3bbbc6 sys/external/bsd/drm2/dist/drm/radeon/radeon_device.c
--- a/sys/external/bsd/drm2/dist/drm/radeon/radeon_device.c     Sun Jan 26 10:13:10 2020 +0000
+++ b/sys/external/bsd/drm2/dist/drm/radeon/radeon_device.c     Sun Jan 26 14:36:35 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: radeon_device.c,v 1.6 2018/08/27 07:48:40 riastradh Exp $      */
+/*     $NetBSD: radeon_device.c,v 1.7 2020/01/26 14:36:35 jmcneill Exp $       */
 
 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
@@ -28,7 +28,7 @@
  *          Jerome Glisse
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: radeon_device.c,v 1.6 2018/08/27 07:48:40 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: radeon_device.c,v 1.7 2020/01/26 14:36:35 jmcneill Exp $");
 
 #include <linux/console.h>
 #include <linux/slab.h>
@@ -835,10 +835,17 @@
            BUS_DMA_WAITOK, &rdev->dummy_page.rdp_map);
        if (error)
                goto fail1;
-       error = bus_dmamap_load_raw(rdev->ddev->dmat, rdev->dummy_page.rdp_map,
-           &rdev->dummy_page.rdp_seg, 1, PAGE_SIZE, BUS_DMA_WAITOK);
+       error = bus_dmamem_map(rdev->ddev->dmat, &rdev->dummy_page.rdp_seg, 1,
+           PAGE_SIZE, &rdev->dummy_page.rdp_addr,
+           BUS_DMA_WAITOK|BUS_DMA_NOCACHE);
        if (error)
                goto fail2;
+       error = bus_dmamap_load(rdev->ddev->dmat, rdev->dummy_page.rdp_map,
+           rdev->dummy_page.rdp_addr, PAGE_SIZE, NULL, BUS_DMA_WAITOK);
+       if (error)
+               goto fail3;
+
+       memset(rdev->dummy_page.rdp_addr, 0, PAGE_SIZE);
 
        /* Success!  */
        rdev->dummy_page.addr = rdev->dummy_page.rdp_map->dm_segs[0].ds_addr;
@@ -846,8 +853,10 @@
                rdev->dummy_page.addr, RADEON_GART_PAGE_DUMMY);
        return 0;
 
-fail3: __unused
+fail4: __unused
        bus_dmamap_unload(rdev->ddev->dmat, rdev->dummy_page.rdp_map);
+fail3: bus_dmamem_unmap(rdev->ddev->dmat, rdev->dummy_page.rdp_addr,
+           PAGE_SIZE);
 fail2: bus_dmamap_destroy(rdev->ddev->dmat, rdev->dummy_page.rdp_map);
 fail1: bus_dmamem_free(rdev->ddev->dmat, &rdev->dummy_page.rdp_seg, 1);
 fail0: KASSERT(error);
@@ -888,6 +897,8 @@
        if (rdev->dummy_page.rdp_map == NULL)
                return;
        bus_dmamap_unload(rdev->ddev->dmat, rdev->dummy_page.rdp_map);
+       bus_dmamem_unmap(rdev->ddev->dmat, rdev->dummy_page.rdp_addr,
+           PAGE_SIZE);
        bus_dmamap_destroy(rdev->ddev->dmat, rdev->dummy_page.rdp_map);
        bus_dmamem_free(rdev->ddev->dmat, &rdev->dummy_page.rdp_seg, 1);
        rdev->dummy_page.rdp_map = NULL;