[RFC 19/24] drm/msm: Split out helper to get iommu prot flags

[Rob Clark]

From: Rob Clark <robdcl...@chromium.org>

We'll re-use this in the vm_bind path.

Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
 drivers/gpu/drm/msm/msm_gem.c | 12 ++++++++++--
 drivers/gpu/drm/msm/msm_gem.h |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index c21e1284f289..7cc4b8955687 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -443,10 +443,9 @@ static struct drm_gpuva *get_vma_locked(struct 
drm_gem_object *obj,
        return vma;
 }
 
-int msm_gem_pin_vma_locked(struct drm_gem_object *obj, struct drm_gpuva *vma)
+int msm_gem_prot(struct drm_gem_object *obj)
 {
        struct msm_gem_object *msm_obj = to_msm_bo(obj);
-       struct page **pages;
        int prot = IOMMU_READ;
 
        if (!(msm_obj->flags & MSM_BO_GPU_READONLY))
@@ -458,6 +457,15 @@ int msm_gem_pin_vma_locked(struct drm_gem_object *obj, 
struct drm_gpuva *vma)
        if (msm_obj->flags & MSM_BO_CACHED_COHERENT)
                prot |= IOMMU_CACHE;
 
+       return prot;
+}
+
+int msm_gem_pin_vma_locked(struct drm_gem_object *obj, struct drm_gpuva *vma)
+{
+       struct msm_gem_object *msm_obj = to_msm_bo(obj);
+       struct page **pages;
+       int prot = msm_gem_prot(obj);
+
        msm_gem_assert_locked(obj);
 
        pages = msm_gem_get_pages_locked(obj, MSM_MADV_WILLNEED);
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index a2255fd269ca..a00149d66d37 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -188,6 +188,7 @@ struct msm_gem_object {
 #define to_msm_bo(x) container_of(x, struct msm_gem_object, base)
 
 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
+int msm_gem_prot(struct drm_gem_object *obj);
 int msm_gem_pin_vma_locked(struct drm_gem_object *obj, struct drm_gpuva *vma);
 void msm_gem_unpin_locked(struct drm_gem_object *obj);
 void msm_gem_unpin_active(struct drm_gem_object *obj);
-- 
2.47.1