Add arm64 support for drm_clflush_virt_range. dcache_clean_inval_poc performs a flush by first performing a clean, follow by an invalidation operation.
v2 (Michael Cheng): Use correct macro for cleaning and invalidation the dcache.
v3 (Michael Cheng): Remove ifdef for asm/cacheflush.h
Signed-off-by: Michael Cheng michael.cheng@intel.com --- drivers/gpu/drm/drm_cache.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index f19d9acbe959..f167bc19afb9 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -28,6 +28,7 @@ * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com> */
+#include <asm/cacheflush.h> #include <linux/dma-buf-map.h> #include <linux/export.h> #include <linux/highmem.h> @@ -176,6 +177,10 @@ drm_clflush_virt_range(void *addr, unsigned long length)
if (wbinvd_on_all_cpus()) pr_err("Timed out waiting for cache flush\n"); + +#elif defined(CONFIG_ARM64) + void *end = addr + length; + dcache_clean_inval_poc((unsigned long)addr, (unsigned long)end); #else pr_err("Architecture has no drm_cache.c support\n"); WARN_ON_ONCE(1);