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authorThomas Hellstrom <thellstrom@vmware.com>2009-07-24 10:22:36 +0200
committerDave Airlie <airlied@redhat.com>2009-07-29 15:56:32 +1000
commitf121ecfebbea1452a17d57c656def7d1537440f7 (patch)
treeddd80ea0b8d76f4bbd6bc348afbbf5b3dab74bb3
parent73ba651fc246fcc3e446da4155e0425b4219d2c4 (diff)
drm/ttm: powerpc: Fix Highmem cache flushing.
Temporarily maps highmem pages while flushing to get a valid virtual address to flush. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/ttm/ttm_tt.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 81ab81f030a3..9b2248a80cff 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -86,10 +86,16 @@ void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages)
unsigned long i;
for (i = 0; i < num_pages; ++i) {
- if (pages[i]) {
- unsigned long start = (unsigned long)page_address(pages[i]);
- flush_dcache_range(start, start + PAGE_SIZE);
- }
+ struct page *page = pages[i];
+ void *page_virtual;
+
+ if (unlikely(page == NULL))
+ continue;
+
+ page_virtual = kmap_atomic(page, KM_USER0);
+ flush_dcache_range((unsigned long) page_virtual,
+ (unsigned long) page_virtual + PAGE_SIZE);
+ kunmap_atomic(page_virtual, KM_USER0);
}
#else
if (on_each_cpu(ttm_tt_ipi_handler, NULL, 1) != 0)