Add Drm::queryEngineInfo.

Related-To: NEO-3008

Change-Id: I2a4d21bfa1f078b5da2f893bdb7554d502df8522
Signed-off-by: Piotr Fusik <piotr.fusik@intel.com>

runtime/dll/linux/drm_neo_create.cpp

@@ -67,7 +67,6 @@ bool Drm::isi915Version(int fd) {
 }
 
 int Drm::getDeviceFd(const int devType) {
-    int fd = -1;
     char fullPath[PATH_MAX];
     const char *pathPrefix;
     unsigned int startNum;
@@ -85,22 +84,21 @@ int Drm::getDeviceFd(const int devType) {
     }
 
     for (unsigned int i = 0; i < maxDrmDevices; i++) {
-        snprintf(fullPath, PATH_MAX, "%s%d", pathPrefix, i + startNum);
-        if ((fd = ::open(fullPath, O_RDWR)) >= 0) {
+        snprintf(fullPath, PATH_MAX, "%s%u", pathPrefix, i + startNum);
+        int fd = ::open(fullPath, O_RDWR);
+        if (fd >= 0) {
             if (isi915Version(fd)) {
-                break;
+                return fd;
             }
             ::close(fd);
-            fd = -1;
         }
     }
 
-    return fd;
+    return -1;
 }
 
 int Drm::openDevice() {
-    int fd = -1;
-    fd = getDeviceFd(0);
+    int fd = getDeviceFd(0);
     if (fd < 0) {
         fd = getDeviceFd(1);
     }

runtime/os_interface/linux/CMakeLists.txt

@@ -32,7 +32,7 @@ set(RUNTIME_SRCS_OS_INTERFACE_LINUX
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_neo.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_neo.h
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_neo_create.cpp
-  ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}/drm_neo_memory_info.cpp
+  ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}/drm_query.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_null_device.h
   ${CMAKE_CURRENT_SOURCE_DIR}/hw_info_config.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/linux_inc.cpp

runtime/os_interface/linux/drm_neo.h

@@ -69,9 +69,10 @@ class Drm {
     MOCKABLE_VIRTUAL int getErrno();
     void setSimplifiedMocsTableUsage(bool value);
     bool getSimplifiedMocsTableUsage() const;
+    void queryEngineInfo();
     void queryMemoryInfo();
 
-    MemoryInfo *getMemoryInfo() {
+    MemoryInfo *getMemoryInfo() const {
         return memoryInfo.get();
     }
 
@@ -92,6 +93,7 @@ class Drm {
     static void closeDevice(int32_t deviceOrdinal);
 
     std::string getSysFsPciPath(int deviceID);
+    void *query(uint32_t queryId);
 
 #pragma pack(1)
     struct PCIConfig {

runtime/os_interface/linux/drm_query.cpp

@@ -9,6 +9,13 @@
 
 namespace NEO {
 
+void *Drm::query(uint32_t queryId) {
+    return nullptr;
+}
+
+void Drm::queryEngineInfo() {
+}
+
 void Drm::queryMemoryInfo() {
 }
 

unit_tests/os_interface/linux/CMakeLists.txt

@@ -17,6 +17,7 @@ set(IGDRCL_SRCS_tests_os_interface_linux
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_buffer_object_tests.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_command_stream_mm_tests.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_command_stream_tests.cpp
+  ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}/drm_engine_info_tests.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/drm_gem_close_worker_tests.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}/drm_mapper_tests.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}/drm_memory_info_tests.cpp

unit_tests/os_interface/linux/drm_engine_info_tests.cpp

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#include "unit_tests/os_interface/linux/drm_mock.h"
+
+#include "gtest/gtest.h"
+
+using namespace NEO;
+
+TEST(DrmTest, whenQueryingDrmThenNullIsReturnedAndNoIoctlIsCalled) {
+    std::unique_ptr<DrmMock> drm = std::make_unique<DrmMock>();
+    EXPECT_NE(nullptr, drm);
+
+    EXPECT_EQ(nullptr, drm->query(1));
+    EXPECT_EQ(0u, drm->ioctlCallsCount);
+}
+
+TEST(DrmTest, whenQueryingEngineInfoThenNoIoctlIsCalled) {
+    std::unique_ptr<DrmMock> drm = std::make_unique<DrmMock>();
+    EXPECT_NE(nullptr, drm);
+
+    drm->queryEngineInfo();
+    EXPECT_EQ(0u, drm->ioctlCallsCount);
+}

unit_tests/os_interface/linux/drm_mock.h

@@ -28,6 +28,7 @@ class DrmMock : public Drm {
   public:
     using Drm::memoryInfo;
     using Drm::preemptionSupported;
+    using Drm::query;
 
     DrmMock() : Drm(mockFd) {
         sysFsDefaultGpuPathToRestore = nullptr;