drm/msm: add internal MSM_BO_MAP_PRIV flag

This flag sets IOMMU_PRIV, which is required for some a6xx GMU objects.
Signed-off-by: NJonathan Marek <jonathan@marek.ca>
Reviewed-by: NJordan Crouse <jcrouse@codeauorora.org>
Signed-off-by: NRob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/msm_gem.c

@@ -428,6 +428,9 @@ static int msm_gem_pin_iova(struct drm_gem_object *obj,
 	if (!(msm_obj->flags & MSM_BO_GPU_READONLY))
 		prot |= IOMMU_WRITE;
 
+	if (msm_obj->flags & MSM_BO_MAP_PRIV)
+		prot |= IOMMU_PRIV;
+
 	WARN_ON(!mutex_is_locked(&msm_obj->lock));
 
 	if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED))

drivers/gpu/drm/msm/msm_gem.h

@@ -13,6 +13,7 @@
 
 /* Additional internal-use only BO flags: */
 #define MSM_BO_STOLEN        0x10000000    /* try to use stolen/splash memory */
+#define MSM_BO_MAP_PRIV      0x20000000    /* use IOMMU_PRIV when mapping */
 
 struct msm_gem_address_space {
 	const char *name;