On 21/10/2024 22:18, Matthew Brost wrote:
Don't open code vmap of a BO, use ttm_bo_access helper which is safe for
non-contiguous BOs and non-visible BOs.
Suggested-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
I guess needs fixes tag?
With that,
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
drivers/gpu/drm/xe/display/intel_bo.c | 25 +------------------------
1 file changed, 1 insertion(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/xe/display/intel_bo.c b/drivers/gpu/drm/xe/display/intel_bo.c
index 9f54fad0f1c0..43141964f6f2 100644
--- a/drivers/gpu/drm/xe/display/intel_bo.c
+++ b/drivers/gpu/drm/xe/display/intel_bo.c
@@ -40,31 +40,8 @@ int intel_bo_fb_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
int intel_bo_read_from_page(struct drm_gem_object *obj, u64 offset, void *dst, int size)
{
struct xe_bo *bo = gem_to_xe_bo(obj);
- struct ttm_bo_kmap_obj map;
- void *src;
- bool is_iomem;
- int ret;
- ret = xe_bo_lock(bo, true);
- if (ret)
- return ret;
-
- ret = ttm_bo_kmap(&bo->ttm, offset >> PAGE_SHIFT, 1, &map);
- if (ret)
- goto out_unlock;
-
- offset &= ~PAGE_MASK;
- src = ttm_kmap_obj_virtual(&map, &is_iomem);
- src += offset;
- if (is_iomem)
- memcpy_fromio(dst, (void __iomem *)src, size);
- else
- memcpy(dst, src, size);
-
- ttm_bo_kunmap(&map);
-out_unlock:
- xe_bo_unlock(bo);
- return ret;
+ return ttm_bo_access(&bo->ttm, offset, dst, size, 0);
}
struct intel_frontbuffer *intel_bo_get_frontbuffer(struct drm_gem_object *obj)
