From: Qiang Yu <Qiang.Yu@xxxxxxx>
Change-Id: Icdc00d3e22e48120ca6f4d73ffd05ba43551ad2c
Signed-off-by: Qiang Yu <Qiang.Yu at amd.com>
---
amdgpu/amdgpu.h | 16 ++++++++++++++++
amdgpu/amdgpu_bo.c | 6 ++++++
2 files changed, 22 insertions(+)
diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
index 693d841..a59630a 100644
--- a/amdgpu/amdgpu.h
+++ b/amdgpu/amdgpu.h
@@ -716,6 +716,22 @@ int amdgpu_find_bo_by_cpu_mapping(amdgpu_device_handle dev,
int amdgpu_bo_free(amdgpu_bo_handle buf_handle);
/**
+ * Increase the refence count of a memory
+ *
+ * \param bo - \c [in] Buffer handle to duplicate
+ *
+ * \return 0 on success\n
+ * <0 - Negative POSIX Error code
+ *
+ * \note It won't really make another copy of the memory, just increase
+ * the reference count of it
+ *
+ * \sa amdgpu_bo_alloc(), amdgpu_bo_free()
+ *
+*/
+int amdgpu_bo_dup(amdgpu_bo_handle bo);
+
+/**
* Request CPU access to GPU accessable memory
*
* \param buf_handle - \c [in] Buffer handle
diff --git a/amdgpu/amdgpu_bo.c b/amdgpu/amdgpu_bo.c
index aa0d001..086779a 100644
--- a/amdgpu/amdgpu_bo.c
+++ b/amdgpu/amdgpu_bo.c
@@ -424,6 +424,12 @@ int amdgpu_bo_free(amdgpu_bo_handle buf_handle)
return 0;
}
+int amdgpu_bo_dup(amdgpu_bo_handle bo)
+{
+ atomic_inc(&bo->refcount);
+ return 0;
+}
+
int amdgpu_bo_cpu_map(amdgpu_bo_handle bo, void **cpu)
{
union drm_amdgpu_gem_mmap args;
--
1.9.1
