This patch uses the __dma_map_area function to flush the cache on ARM64.
v2: Don't use DMA API, call functions directly (Daniel)
Signed-off-by: Gurchetan Singh gurchetansingh@chromium.org --- drivers/gpu/drm/drm_cache.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index 5124582451c6..250cdfbb711f 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -159,6 +159,12 @@ drm_flush_pages(struct page *pages[], unsigned long num_pages) for (i = 0; i < num_pages; i++) drm_cache_maint_page(pages[i], 0, PAGE_SIZE, DMA_TO_DEVICE, dmac_map_area); +#elif defined(CONFIG_ARM64) + unsigned long i; + + for (i = 0; i < num_pages; i++) + __dma_map_area(phys_to_virt(page_to_phys(pages[i])), PAGE_SIZE, + DMA_TO_DEVICE); #else pr_err("Architecture has no drm_cache.c support\n"); WARN_ON_ONCE(1); @@ -196,6 +202,13 @@ drm_flush_sg(struct sg_table *st) for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) drm_cache_maint_page(sg_page_iter_page(&sg_iter), 0, PAGE_SIZE, DMA_TO_DEVICE, dmac_map_area); +#elif defined(CONFIG_ARM64) + int i; + struct scatterlist *sg; + + for_each_sg(st->sgl, sg, st->nents, i) + __dma_map_area(phys_to_virt(sg_phys(sg)), sg->length, + DMA_TO_DEVICE); #else pr_err("Architecture has no drm_cache.c support\n"); WARN_ON_ONCE(1);