drm/amdgpu: add syncobj create/destroy/import/export apis

These are just wrappers using the amdgpu device handle.

Acked-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 92 insertions, 1 deletions

diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
index 1901fa8c..183f974c 100644
--- a/amdgpu/amdgpu.h
+++ b/amdgpu/amdgpu.h
@@ -1328,8 +1328,61 @@ int amdgpu_cs_destroy_semaphore(amdgpu_semaphore_handle sem);
 */
 const char *amdgpu_get_marketing_name(amdgpu_device_handle dev);
 
+/**
+ *  Create kernel sync object
+ *
+ * \param   dev	      - \c [in]  device handle
+ * \param   syncobj   - \c [out] sync object handle
+ *
+ * \return   0 on success\n
+ *          <0 - Negative POSIX Error code
+ *
+*/
+int amdgpu_cs_create_syncobj(amdgpu_device_handle dev,
+			     uint32_t *syncobj);
+/**
+ *  Destroy kernel sync object
+ *
+ * \param   dev	    - \c [in] device handle
+ * \param   syncobj - \c [in] sync object handle
+ *
+ * \return   0 on success\n
+ *          <0 - Negative POSIX Error code
+ *
+*/
+int amdgpu_cs_destroy_syncobj(amdgpu_device_handle dev,
+			      uint32_t syncobj);
+
+/**
+ *  Export kernel sync object to shareable fd.
+ *
+ * \param   dev	       - \c [in] device handle
+ * \param   syncobj    - \c [in] sync object handle
+ * \param   shared_fd  - \c [out] shared file descriptor.
+ *
+ * \return   0 on success\n
+ *          <0 - Negative POSIX Error code
+ *
+*/
+int amdgpu_cs_export_syncobj(amdgpu_device_handle dev,
+			     uint32_t syncobj,
+			     int *shared_fd);
+/**
+ *  Import kernel sync object from shareable fd.
+ *
+ * \param   dev	       - \c [in] device handle
+ * \param   shared_fd  - \c [in] shared file descriptor.
+ * \param   syncobj    - \c [out] sync object handle
+ *
+ * \return   0 on success\n
+ *          <0 - Negative POSIX Error code
+ *
+*/
+int amdgpu_cs_import_syncobj(amdgpu_device_handle dev,
+			     int shared_fd,
+			     uint32_t *syncobj);
+
 #ifdef __cplusplus
 }
 #endif
-
 #endif /* #ifdef _AMDGPU_H_ */
diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
index 868eb7b0..722fd75b 100644
--- a/amdgpu/amdgpu_cs.c
+++ b/amdgpu/amdgpu_cs.c
@@ -596,3 +596,41 @@ int amdgpu_cs_destroy_semaphore(amdgpu_semaphore_handle sem)
 {
 	return amdgpu_cs_unreference_sem(sem);
 }
+
+int amdgpu_cs_create_syncobj(amdgpu_device_handle dev,
+			     uint32_t *handle)
+{
+	if (NULL == dev)
+		return -EINVAL;
+
+	return drmSyncobjCreate(dev->fd, 0, handle);
+}
+
+int amdgpu_cs_destroy_syncobj(amdgpu_device_handle dev,
+			      uint32_t handle)
+{
+	if (NULL == dev)
+		return -EINVAL;
+
+	return drmSyncobjDestroy(dev->fd, handle);
+}
+
+int amdgpu_cs_export_syncobj(amdgpu_device_handle dev,
+			     uint32_t handle,
+			     int *shared_fd)
+{
+	if (NULL == dev)
+		return -EINVAL;
+
+	return drmSyncobjHandleToFD(dev->fd, handle, shared_fd);
+}
+
+int amdgpu_cs_import_syncobj(amdgpu_device_handle dev,
+			     int shared_fd,
+			     uint32_t *handle)
+{
+	if (NULL == dev)
+		return -EINVAL;
+
+	return drmSyncobjFDToHandle(dev->fd, shared_fd, handle);
+}