SWDEV-209060 - Create the Skeleton RDC CLI and daemon

Create the skeleton implementation of rdc_client.so and rdci. Modify current rdcd to
integrate the RDC API service:

rdc.proto is changed to add a new RdcAPI service which defined the interfaces for the RDC API.

RdcStandaloneHandler.cpp is added to send the request using gRPC to the rdcd. It is built into
the rdc_client.so

rdci.cc, RdciDisCoverySubSystem.cc and RdciSubSystem.cc are added to implement skeleton rdci.
Currently, the discovery subsystem is supported.

rdc_api_service.cc is added to the server as a skeleton to implement the RdcAPI service. Currently,
only discovery API is implemented. Note: we disabled the rdc_rsmi_service, which will be removed
in the future. The original rdc_client.so is renamed to rdc_client_smi.so which should also be
removed in the future.

Add the instruction how to run the rdcd and rdci in the build folder in the README.md.

Change-Id: Id232f9f83787e5812d4a295dc8cf0daa7728b06c

server/src/rdc_api_service.cc

@@ -0,0 +1,110 @@
+/*
+Copyright (c) 2020 - present Advanced Micro Devices, Inc. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+#include <assert.h>
+#include <grpcpp/grpcpp.h>
+
+#include <iostream>
+#include <memory>
+#include <string>
+#include <csignal>
+
+#include "rdc.grpc.pb.h"  // NOLINT
+#include "rdc/rdc_api_service.h"
+#include "rdc/rdc.h"
+
+namespace amd {
+namespace rdc {
+
+RdcAPIServiceImpl::RdcAPIServiceImpl():rdc_handle_(nullptr) {
+}
+
+rdc_status_t RdcAPIServiceImpl::Initialize(uint64_t rdcd_init_flags) {
+    rdc_status_t result = rdc_init(rdcd_init_flags);
+    if (result != RDC_ST_OK) {
+        std::cout << "RDC API initialize fail\n";
+        return result;
+    }
+
+    result = rdc_start_embedded(RDC_OPERATION_MODE_AUTO, &rdc_handle_);
+    if (result != RDC_ST_OK) {
+        std::cout << "RDC API start embedded fail\n";
+    }
+
+    return result;
+}
+
+RdcAPIServiceImpl::~RdcAPIServiceImpl() {
+  if (rdc_handle_) {
+    rdc_stop_embedded(rdc_handle_);
+    rdc_handle_ = nullptr;
+  }
+  rdc_shutdown();
+}
+
+::grpc::Status RdcAPIServiceImpl::GetAllDevices(::grpc::ServerContext* context,
+                  const ::rdc::Empty* request,
+                  ::rdc::GetAllDevicesResponse* reply) {
+    (void)(context);
+    (void)(request);
+    if (!reply) {
+      return ::grpc::Status(::grpc::StatusCode::INTERNAL, "Empty reply");
+    }
+    uint32_t  gpu_index_list[RDC_MAX_NUM_DEVICES];
+    uint32_t count = 0;
+    rdc_status_t result =  rdc_get_all_devices(rdc_handle_,
+                  gpu_index_list, &count);
+    reply->set_status(result);
+    if (result != RDC_ST_OK) {
+        return ::grpc::Status::OK;
+    }
+    for (uint32_t i = 0; i < count; i++) {
+         reply->add_gpus(gpu_index_list[i]);
+    }
+
+    return ::grpc::Status::OK;
+}
+
+::grpc::Status RdcAPIServiceImpl::GetDeviceAttributes(
+      ::grpc::ServerContext* context,
+      const ::rdc::GetDeviceAttributesRequest* request,
+      ::rdc::GetDeviceAttributesResponse* reply) {
+    (void)(context);
+    if (!reply || !request) {
+      return ::grpc::Status(::grpc::StatusCode::INTERNAL, "Empty contents");
+    }
+    uint32_t gpu_index = request->gpu_index();
+    rdc_device_attributes_t attribute;
+    rdc_status_t result = rdc_get_device_attributes(rdc_handle_,
+            gpu_index, &attribute);
+
+    ::rdc::DeviceAttributes* attr = reply->mutable_attributes();
+    attr->set_device_name(attribute.device_name);
+
+    reply->set_status(result);
+
+    return ::grpc::Status::OK;
+}
+
+}  // namespace rdc
+}  // namespace amd
+
+

server/src/rdc_server_main.cc

@@ -39,6 +39,7 @@ THE SOFTWARE.
 #include "rocm_smi/rocm_smi.h"
 #include "rdc/rdc_server_main.h"
 #include "rdc/rdc_rsmi_service.h"
+#include "rdc/rdc_api_service.h"
 #include "rdc/rdc_server_utils.h"
 
 static bool sShutDownServer = false;
@@ -86,6 +87,19 @@ RDCServer::Run() {
     }
   }
 
+  if (start_api_service()) {
+    api_service_ = new amd::rdc::RdcAPIServiceImpl();
+    builder.RegisterService(api_service_);
+
+    // TODO(bill_liu): pass flags from cnfg file
+    rdc_status_t ret = api_service_->Initialize(0);
+
+    if (ret != RDC_ST_OK) {
+      std::cerr << "Failed to start API service" << std::endl;
+      return;
+    }
+  }
+
   // Finally assemble the server.
   // std::unique_ptr<::grpc::Server> server(builder.BuildAndStart());
   server_ = builder.BuildAndStart();
@@ -316,8 +330,9 @@ int main(int argc, char** argv) {
   }
 
   // TODO(cfreehil): Eventually, set these by reading a config file
-  rdc_server.set_start_rsmi_service(true);
+  rdc_server.set_start_rsmi_service(false);
   rdc_server.set_start_rdc_admin_service(true);
+  rdc_server.set_start_api_service(true);
 
   rdc_server.Run();