Revert "drm/i915/gem: Delete unused code"

These commits caused a regression on Lenovo t520 sandybridge
machine belonging to reporter. We are reverting them for 5.10
for other reasons, so just do it for 5.9 as well.

This reverts commit 7ac2d2536dfa71c275a74813345779b1e7522c91.

Reported-by: Harald Arnesen <harald@skogtun.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 64901cf..446e76e 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -965,6 +965,25 @@ static void reloc_cache_init(struct reloc_cache *cache,
        cache->target = NULL;
 }
 
+static inline void *unmask_page(unsigned long p)
+{
+       return (void *)(uintptr_t)(p & PAGE_MASK);
+}
+
+static inline unsigned int unmask_flags(unsigned long p)
+{
+       return p & ~PAGE_MASK;
+}
+
+#define KMAP 0x4 /* after CLFLUSH_FLAGS */
+
+static inline struct i915_ggtt *cache_to_ggtt(struct reloc_cache *cache)
+{
+       struct drm_i915_private *i915 =
+               container_of(cache, struct i915_execbuffer, reloc_cache)->i915;
+       return &i915->ggtt;
+}
+
 #define RELOC_TAIL 4
 
 static int reloc_gpu_chain(struct reloc_cache *cache)