Add support for exporting portable handles to GPU allocations.

Adds hsa_amd_portable_export_dmabuf and hsa_amd_portable_close_dmabuf
which allow obtaining dmabuf handles to rocr allocations.  These handles
may be shared with other APIs to support cross vendor & cross device
memory sharing.
Adds query to return whether dmabuf export is supported

Signed-off-by: Jonathan Kim <Jonathan.Kim@amd.com>
Signed-off-by: David Yat Sin <David.YatSin@amd.com>

Change-Id: I7f98501087d9563d07fc2cb428cc886b1e518b1e


[ROCm/ROCR-Runtime commit: 42243c1e8f]

projects/rocr-runtime/runtime/hsa-runtime/core/inc/hsa_ext_amd_impl.h

@@ -291,6 +291,13 @@ hsa_status_t HSA_API hsa_amd_spm_set_dest_buffer(hsa_agent_t agent, size_t size,
                                                  uint32_t* size_copied, void* dest,
                                                  bool* is_data_loss);
 
+// Mirrors Amd Extension Apis
+hsa_status_t HSA_API hsa_amd_portable_export_dmabuf(const void* ptr, size_t size, int* dmabuf,
+                                                    uint64_t* offset);
+
+// Mirrors Amd Extension Apis
+hsa_status_t HSA_API hsa_amd_portable_close_dmabuf(int dmabuf);
+
 }  // namespace amd
 }  // namespace rocr
 

projects/rocr-runtime/runtime/hsa-runtime/core/inc/runtime.h

@@ -338,6 +338,10 @@ class Runtime {
   hsa_status_t SvmPrefetch(void* ptr, size_t size, hsa_agent_t agent, uint32_t num_dep_signals,
                            const hsa_signal_t* dep_signals, hsa_signal_t completion_signal);
 
+  hsa_status_t DmaBufExport(const void* ptr, size_t size, int* dmabuf, uint64_t* offset);
+
+  hsa_status_t DmaBufClose(int dmabuf);
+
   const std::vector<Agent*>& cpu_agents() { return cpu_agents_; }
 
   const std::vector<Agent*>& gpu_agents() { return gpu_agents_; }