rocr: Add hsa_amd_portable_export_dmabuf_v2

The original version of hsa_amd_portable_export_dmabuf() did not
consider the conditions under which a dmabuf could be shared.
In the new version (hsa_amd_portable_export_dmabuf_v2()), the caller
can specify the flag HSA_AMD_DMABUF_MAPPING_TYPE_PCIE, which means they
want to share the dmabuf over PCIe. In that case, the new code will check
that if it is a PCIe GPU and it is not in a XGMI Hive then if
large-BAR is not supported, we will return an error.

runtime/hsa-runtime/core/runtime/hsa_api_trace.cpp

@@ -87,7 +87,7 @@ void HsaApiTable::Init() {
   // they can add preprocessor macros on the new functions
 
   constexpr size_t expected_core_api_table_size = 1016;
-  constexpr size_t expected_amd_ext_table_size = 600;
+  constexpr size_t expected_amd_ext_table_size = 608;
   constexpr size_t expected_image_ext_table_size = 128;
   constexpr size_t expected_finalizer_ext_table_size = 64;
   constexpr size_t expected_tools_table_size = 64;
@@ -476,6 +476,7 @@ void HsaApiTable::UpdateAmdExts() {
   amd_ext_api.hsa_amd_enable_logging_fn = AMD::hsa_amd_enable_logging;
   amd_ext_api.hsa_amd_signal_wait_all_fn = AMD::hsa_amd_signal_wait_all;
   amd_ext_api.hsa_amd_memory_get_preferred_copy_engine_fn = AMD::hsa_amd_memory_get_preferred_copy_engine;
+  amd_ext_api.hsa_amd_portable_export_dmabuf_v2_fn = AMD::hsa_amd_portable_export_dmabuf_v2;
 }
 
 void HsaApiTable::UpdateTools() {

runtime/hsa-runtime/core/runtime/hsa_ext_amd.cpp

@@ -1307,14 +1307,28 @@ hsa_status_t hsa_amd_spm_set_dest_buffer(hsa_agent_t preferred_agent, size_t siz
 }
 
 hsa_status_t hsa_amd_portable_export_dmabuf(const void* ptr, size_t size, int* dmabuf,
-                                            uint64_t* offset) {
+  uint64_t* offset) {
+TRY;
+IS_OPEN();
+IS_BAD_PTR(ptr);
+IS_BAD_PTR(dmabuf);
+IS_BAD_PTR(offset);
+IS_ZERO(size);
+return core::Runtime::runtime_singleton_->DmaBufExport(ptr, size, dmabuf,
+                                    offset, HSA_AMD_DMABUF_MAPPING_TYPE_NONE);
+CATCH;
+}
+
+hsa_status_t hsa_amd_portable_export_dmabuf_v2(const void* ptr, size_t size,
+                              int* dmabuf, uint64_t* offset, uint64_t flags) {
   TRY;
   IS_OPEN();
   IS_BAD_PTR(ptr);
   IS_BAD_PTR(dmabuf);
   IS_BAD_PTR(offset);
   IS_ZERO(size);
-  return core::Runtime::runtime_singleton_->DmaBufExport(ptr, size, dmabuf, offset);
+  return core::Runtime::runtime_singleton_->DmaBufExport(ptr, size,
+                                                      dmabuf, offset, flags);
   CATCH;
 }
 

runtime/hsa-runtime/core/runtime/runtime.cpp

@@ -3078,7 +3078,8 @@ Agent* Runtime::GetSVMPrefetchAgent(void* ptr, size_t size) {
   return agents_by_node_[prefetch_node][0];
 }
 
-hsa_status_t Runtime::DmaBufExport(const void* ptr, size_t size, int* dmabuf, uint64_t* offset) {
+hsa_status_t Runtime::DmaBufExport(const void* ptr, size_t size, int* dmabuf,
+                                           uint64_t* offset, uint64_t flags) {
 #ifdef __linux__
   ScopedAcquire<KernelSharedMutex::Shared> lock(memory_lock_.shared());
   // Lookup containing allocation.
@@ -3093,6 +3094,14 @@ hsa_status_t Runtime::DmaBufExport(const void* ptr, size_t size, int* dmabuf, ui
         if (mem->second.region->owner()->device_type() != Agent::kAmdGpuDevice)
           return HSA_STATUS_ERROR_INVALID_AGENT;
 
+        rocr::AMD::GpuAgent* owner =
+                    static_cast<AMD::GpuAgent*>(mem->second.region->owner());
+
+        if (flags & HSA_AMD_DMABUF_MAPPING_TYPE_PCIE &&
+            !owner->is_xgmi_cpu_gpu() &&
+            !owner->LargeBarEnabled()) {
+            return (hsa_status_t)HSA_STATUS_ERROR_NOT_SUPPORTED;
+        }
         int fd;
         uint64_t off;
         HSAKMT_STATUS err = HSAKMT_CALL(hsaKmtExportDMABufHandle(const_cast<void*>(ptr), size, &fd, &off));
@@ -3319,7 +3328,6 @@ hsa_status_t Runtime::VMemoryHandleUnmap(void* va, size_t size) {
   if (va_chunk != va_ptr + size) {
     return HSA_STATUS_ERROR_INVALID_ALLOCATION;
   }
-  hsa_status_t status;
 
   for (auto mappedHandleIt : mappedHandles) {
     // Remove access from all agents that were allowed access