Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_ttm.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 55cf05e1c81c398fc747f598d1ce0bc78a38a435..6442a06d6fdc1ce9115d280cc916b4e55923f2fa 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -783,6 +783,25 @@ bool amdgpu_ttm_tt_has_userptr(struct ttm_tt *ttm)
        return !!gtt->userptr;
 }
 
+bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
+                                 unsigned long end)
+{
+       struct amdgpu_ttm_tt *gtt = (void *)ttm;
+       unsigned long size;
+
+       if (gtt == NULL)
+               return false;
+
+       if (gtt->ttm.ttm.state != tt_bound || !gtt->userptr)
+               return false;
+
+       size = (unsigned long)gtt->ttm.ttm.num_pages * PAGE_SIZE;
+       if (gtt->userptr > end || gtt->userptr + size <= start)
+               return false;
+
+       return true;
+}
+
 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
 {
        struct amdgpu_ttm_tt *gtt = (void *)ttm;