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drm/xe/display: Update intel_bo_read_from_page to use ttm_bo_access

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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@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241126174615.2665852-6-matthew.brost@intel.com
This commit is contained in:
Matthew Brost 2024-11-26 09:46:12 -08:00
parent 1c6878af11
commit b6308aaa24
1 changed files with 1 additions and 24 deletions
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25
drivers/gpu/drm/xe/display/intel_bo.c
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@ -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)