[PATCH v2 20/34] drm/msm: Split out helper to get iommu prot flags

From: Rob Clark
Date: Wed Mar 19 2025 - 11:34:32 EST


From: Rob Clark <robdclark@xxxxxxxxxxxx>

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

Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
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 9d4f7b76471f..632f560c81ec 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -450,10 +450,9 @@ 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))
@@ -469,6 +468,15 @@ int msm_gem_pin_vma_locked(struct drm_gem_object *obj, struct drm_gpuva *vma)
else if (prot == 2)
prot |= IOMMU_USE_LLC_NWA;

+ 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 d427ead2dce0..7ccdf15476b9 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);
--
2.48.1