[CustomDevice] refine custom device api (#50152)

paddle/phi/backends/custom/custom_device.cc

@@ -148,38 +148,41 @@ class CustomDevice : public DeviceInterface {
                         stream::Stream::Flag::kDefaultFlag) override {
     const auto device = &devices_pool[dev_id];
     C_Stream c_stream;
+    if (pimpl_->create_stream) {
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(
           pimpl_->create_stream(device, &c_stream));
+    } else {
+      c_stream = nullptr;
+    }
     stream->set_stream(c_stream);
   }
 
   void DestroyStream(size_t dev_id, stream::Stream* stream) override {
+    if (pimpl_->destroy_stream) {
       const auto device = &devices_pool[dev_id];
-
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(pimpl_->destroy_stream(
           device, reinterpret_cast<C_Stream>(stream->raw_stream())));
     }
+  }
 
   void SynchronizeStream(size_t dev_id, const stream::Stream* stream) override {
+    if (pimpl_->synchronize_stream) {
       const auto device = &devices_pool[dev_id];
-
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(pimpl_->synchronize_stream(
           device, reinterpret_cast<C_Stream>(stream->raw_stream())));
     }
+  }
 
   bool QueryStream(size_t dev_id, const stream::Stream* stream) override {
-    const auto device = &devices_pool[dev_id];
-
     if (!pimpl_->query_stream) {
       SynchronizeStream(dev_id, stream);
       return true;
-    }
-    if (pimpl_->query_stream(
+    } else {
+      const auto device = &devices_pool[dev_id];
+      return pimpl_->query_stream(
                  device, reinterpret_cast<C_Stream>(stream->raw_stream())) ==
-        C_SUCCESS) {
-      return true;
+             C_SUCCESS;
     }
-    return false;
   }
 
   void AddCallback(size_t dev_id,
@@ -259,6 +262,7 @@ class CustomDevice : public DeviceInterface {
   void StreamWaitEvent(size_t dev_id,
                        const stream::Stream* stream,
                        const event::Event* event) override {
+    if (pimpl_->stream_wait_event) {
       const auto device = &devices_pool[dev_id];
 
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(pimpl_->stream_wait_event(
@@ -266,6 +270,7 @@ class CustomDevice : public DeviceInterface {
           reinterpret_cast<C_Stream>(stream->raw_stream()),
           reinterpret_cast<C_Event>(event->raw_event())));
     }
+  }
 
   void MemoryCopyH2D(size_t dev_id,
                      void* dst,
@@ -279,7 +284,7 @@ class CustomDevice : public DeviceInterface {
       C_Stream c_stream = reinterpret_cast<C_Stream>(stream->raw_stream());
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(
           pimpl_->async_memory_copy_h2d(device, c_stream, dst, src, size));
-    } else {
+    } else if (pimpl_->memory_copy_h2d) {
       paddle::platform::DeviceContextPool& pool =
           paddle::platform::DeviceContextPool::Instance();
       pool.Get(place)->Wait();
@@ -300,7 +305,7 @@ class CustomDevice : public DeviceInterface {
       C_Stream c_stream = reinterpret_cast<C_Stream>(stream->raw_stream());
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(
           pimpl_->async_memory_copy_d2h(device, c_stream, dst, src, size));
-    } else {
+    } else if (pimpl_->memory_copy_d2h) {
       paddle::platform::DeviceContextPool& pool =
           paddle::platform::DeviceContextPool::Instance();
       pool.Get(place)->Wait();
@@ -321,7 +326,7 @@ class CustomDevice : public DeviceInterface {
       C_Stream c_stream = reinterpret_cast<C_Stream>(stream->raw_stream());
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(
           pimpl_->async_memory_copy_d2d(device, c_stream, dst, src, size));
-    } else {
+    } else if (pimpl_->memory_copy_d2d) {
       paddle::platform::DeviceContextPool& pool =
           paddle::platform::DeviceContextPool::Instance();
       pool.Get(place)->Wait();
@@ -455,6 +460,7 @@ class CustomDevice : public DeviceInterface {
   }
 
   void MemoryStats(size_t dev_id, size_t* total, size_t* free) override {
+    if (pimpl_->device_memory_stats) {
       const auto device = &devices_pool[dev_id];
 
       PADDLE_ENFORCE_CUSTOM_DEVICE_SUCCESS(
@@ -464,15 +470,23 @@ class CustomDevice : public DeviceInterface {
       VLOG(10) << Type() << " memory usage " << (used >> 20) << "M/"
                << (*total >> 20) << "M, " << (*free >> 20)
                << "M available to allocate";
+    } else {
+      *total = 0;
+      *free = 0;
+    }
   }
 
   size_t GetMinChunkSize(size_t dev_id) override {
+    if (pimpl_->device_min_chunk_size) {
       const auto device = &devices_pool[dev_id];
 
       size_t size = 0;
       pimpl_->device_min_chunk_size(device, &size);
       VLOG(10) << Type() << " min chunk size " << size << "B";
       return size;
+    } else {
+      return 1;
+    }
   }
 
   size_t GetMaxChunkSize(size_t dev_id) override {
@@ -911,8 +925,8 @@ bool ValidCustomCustomRuntimeParams(const CustomRuntimeParams* params) {
   CHECK_INTERFACE(get_device, true);
   CHECK_INTERFACE(deinit_device, false);
 
-  CHECK_INTERFACE(create_stream, true);
-  CHECK_INTERFACE(destroy_stream, true);
+  CHECK_INTERFACE(create_stream, false);
+  CHECK_INTERFACE(destroy_stream, false);
   CHECK_INTERFACE(query_stream, false);
   CHECK_INTERFACE(stream_add_callback, false);
 
@@ -922,9 +936,9 @@ bool ValidCustomCustomRuntimeParams(const CustomRuntimeParams* params) {
   CHECK_INTERFACE(query_event, false);
 
   CHECK_INTERFACE(synchronize_device, false);
-  CHECK_INTERFACE(synchronize_stream, true);
+  CHECK_INTERFACE(synchronize_stream, false);
   CHECK_INTERFACE(synchronize_event, true);
-  CHECK_INTERFACE(stream_wait_event, true);
+  CHECK_INTERFACE(stream_wait_event, false);
 
   CHECK_INTERFACE(device_memory_allocate, true);
   CHECK_INTERFACE(device_memory_deallocate, true);
@@ -932,9 +946,9 @@ bool ValidCustomCustomRuntimeParams(const CustomRuntimeParams* params) {
   CHECK_INTERFACE(host_memory_deallocate, false);
   CHECK_INTERFACE(unified_memory_allocate, false);
   CHECK_INTERFACE(unified_memory_deallocate, false);
-  CHECK_INTERFACE(memory_copy_h2d, true);
-  CHECK_INTERFACE(memory_copy_d2h, true);
-  CHECK_INTERFACE(memory_copy_d2d, true);
+  CHECK_INTERFACE(memory_copy_h2d, false);
+  CHECK_INTERFACE(memory_copy_d2h, false);
+  CHECK_INTERFACE(memory_copy_d2d, false);
   CHECK_INTERFACE(memory_copy_p2p, false);
   CHECK_INTERFACE(async_memory_copy_h2d, false);
   CHECK_INTERFACE(async_memory_copy_d2h, false);
@@ -943,9 +957,9 @@ bool ValidCustomCustomRuntimeParams(const CustomRuntimeParams* params) {
 
   CHECK_INTERFACE(get_device_count, true);
   CHECK_INTERFACE(get_device_list, true);
-  CHECK_INTERFACE(device_memory_stats, true);
+  CHECK_INTERFACE(device_memory_stats, false);
 
-  CHECK_INTERFACE(device_min_chunk_size, true);
+  CHECK_INTERFACE(device_min_chunk_size, false);
   CHECK_INTERFACE(device_max_chunk_size, false);
   CHECK_INTERFACE(device_max_alloc_size, false);
   CHECK_INTERFACE(device_extra_padding_size, false);