[PATCH 2/4] drm: add additional parameter in drm_flush_pages() and drm_flush_sg()

[Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx>]

We've found the DMA API is effective for flushing the cache on ARM
devices, and it requires a struct device *.

Signed-off-by: Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx>
---
 drivers/gpu/drm/drm_cache.c             | 5 +++--
 drivers/gpu/drm/i915/i915_gem.c         | 2 +-
 drivers/gpu/drm/i915/i915_gem_clflush.c | 2 +-
 drivers/gpu/drm/ttm/ttm_tt.c            | 2 +-
 drivers/gpu/drm/vgem/vgem_drv.c         | 2 +-
 include/drm/drm_cache.h                 | 5 +++--
 6 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
index 89cdd32fe1f3..3d2bb9d71a60 100644
--- a/drivers/gpu/drm/drm_cache.c
+++ b/drivers/gpu/drm/drm_cache.c
@@ -78,7 +78,8 @@ static void drm_cache_flush_clflush(struct page *pages[],
  * to a page in the array.
  */
 void
-drm_flush_pages(struct page *pages[], unsigned long num_pages)
+drm_flush_pages(struct device *dev, struct page *pages[],
+		unsigned long num_pages)
 {
 
 #if defined(CONFIG_X86)
@@ -119,7 +120,7 @@ EXPORT_SYMBOL(drm_flush_pages);
  * sg.
  */
 void
-drm_flush_sg(struct sg_table *st)
+drm_flush_sg(struct device *dev, struct sg_table *st)
 {
 #if defined(CONFIG_X86)
 	if (static_cpu_has(X86_FEATURE_CLFLUSH)) {
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index fe191d0e84e1..045866f2b5dd 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -259,7 +259,7 @@ __i915_gem_object_release_shmem(struct drm_i915_gem_object *obj,
 	if (needs_clflush &&
 	    (obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0 &&
 	    !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ))
-		drm_flush_sg(pages);
+		drm_flush_sg(obj->base.dev->dev, pages);
 
 	__start_cpu_write(obj);
 }
diff --git a/drivers/gpu/drm/i915/i915_gem_clflush.c b/drivers/gpu/drm/i915/i915_gem_clflush.c
index f413c5e5735d..b5938f14141f 100644
--- a/drivers/gpu/drm/i915/i915_gem_clflush.c
+++ b/drivers/gpu/drm/i915/i915_gem_clflush.c
@@ -71,7 +71,7 @@ static const struct dma_fence_ops i915_clflush_ops = {
 static void __i915_do_clflush(struct drm_i915_gem_object *obj)
 {
 	GEM_BUG_ON(!i915_gem_object_has_pages(obj));
-	drm_flush_sg(obj->mm.pages);
+	drm_flush_sg(obj->base.dev->dev, obj->mm.pages);
 	intel_fb_obj_flush(obj, ORIGIN_CPU);
 }
 
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 59e272a58752..fb2382d01bba 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -122,7 +122,7 @@ static int ttm_tt_set_caching(struct ttm_tt *ttm,
 	}
 
 	if (ttm->caching_state == tt_cached)
-		drm_flush_pages(ttm->pages, ttm->num_pages);
+		drm_flush_pages(NULL, ttm->pages, ttm->num_pages);
 
 	for (i = 0; i < ttm->num_pages; ++i) {
 		cur_page = ttm->pages[i];
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 802a97e1a4bf..35bfdfb746a7 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -325,7 +325,7 @@ static int vgem_prime_pin(struct drm_gem_object *obj)
 	/* Flush the object from the CPU cache so that importers can rely
 	 * on coherent indirect access via the exported dma-address.
 	 */
-	drm_flush_pages(pages, n_pages);
+	drm_flush_pages(obj->dev->dev, pages, n_pages);
 
 	return 0;
 }
diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h
index 25c029470315..cb77315dd8dd 100644
--- a/include/drm/drm_cache.h
+++ b/include/drm/drm_cache.h
@@ -35,8 +35,9 @@
 
 #include <linux/scatterlist.h>
 
-void drm_flush_pages(struct page *pages[], unsigned long num_pages);
-void drm_flush_sg(struct sg_table *st);
+void drm_flush_pages(struct device *dev, struct page *pages[],
+		     unsigned long num_pages);
+void drm_flush_sg(struct device *dev, struct sg_table *st);
 void drm_clflush_virt_range(void *addr, unsigned long length);
 
 static inline bool drm_arch_can_wc_memory(void)
-- 
2.13.5

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