[PATCH v3 3/7] drm/i915: use the memcpy_from_wc call from the drm

[Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>]

memcpy_from_wc functions in i915_memcpy.c will be removed and replaced
by the implementation in drm_cache.c.
Updated to use the functions provided by drm_cache.c.

v2: Pass newly added src offset argument to the modified
drm_memcpy_from_wc_vaddr() function.

Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 06b1b188ce5a..c1ff0a591a24 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -438,16 +438,16 @@ static void
 i915_gem_object_read_from_page_iomap(struct drm_i915_gem_object *obj, u64 offset, void *dst, int size)
 {
 	void __iomem *src_map;
-	void __iomem *src_ptr;
+	struct iosys_map src;
+
 	dma_addr_t dma = i915_gem_object_get_dma_address(obj, offset >> PAGE_SHIFT);
 
 	src_map = io_mapping_map_wc(&obj->mm.region->iomap,
 				    dma - obj->mm.region->region.start,
 				    PAGE_SIZE);
 
-	src_ptr = src_map + offset_in_page(offset);
-	if (!i915_memcpy_from_wc(dst, (void __force *)src_ptr, size))
-		memcpy_fromio(dst, src_ptr, size);
+	iosys_map_set_vaddr_iomem(&src, src_map);
+	drm_memcpy_from_wc_vaddr(dst, &src, offset_in_page(offset), size);
 
 	io_mapping_unmap(src_map);
 }
-- 
2.25.1