Improve test coverage

Additionally fixed a bug in uapi::i915::find_fd where it was using a
non-owned RawFd and then closing the file descriptor at the end of the
scope of the closure.

src/uapi/i915/mod.rs

@@ -13,7 +13,7 @@ pub enum EngineClass {
     Render, Copy, Video, VideoEnhance, Compute, Invalid
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct EngineClassInstance {
     pub engine_class: EngineClass,
     pub engine_instance: u16,
@@ -21,7 +21,7 @@ pub struct EngineClassInstance {
 
 pub type EngineInfoFlags = u64;
 
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct EngineInfo {
     pub engine: EngineClassInstance,
     pub logical_instance: u16,
@@ -154,6 +154,6 @@ pub fn find_node() -> Option<DrmDeviceNode> {
     None
 }
 
-pub fn find_fd() -> Option<RawFd> {
-    return find_node().map(|node| node.fd.as_raw_fd());
+pub fn find_fd() -> Option<OwnedFd> {
+    return find_node().map(|node| node.fd);
 }

tests/tests_i915_gpu.rs

@@ -13,6 +13,25 @@ fn test_i915_gpu_find_device() {
     assert_eq!(drm_version.desc.to_str().unwrap(), "Intel Graphics");
 }
 
+#[test]
+fn test_i915_gpu_from_path() {
+    let device = i915::find_device().expect("Failed to find i915 device");
+    let path = device.node.path.clone().expect("Failed to get path");
+    let device_2 = i915::Device::from_path(path).expect("Failed to create device from path");
+    assert_eq!(device.driver.name, device_2.driver.name);
+    assert_eq!(device.driver.desc, device_2.driver.desc);
+    assert_eq!(device.node.path, device_2.node.path);
+}
+
+#[test]
+fn test_i915_gpu_from_fd() {
+    let device = i915::find_device().expect("Failed to find i915 device");
+    let fd = device.node.fd;
+    let device_2 = i915::Device::from_fd(OwnedFd::from(fd)).expect("Failed to create device from fd");
+    assert_eq!(device.driver.name, device_2.driver.name);
+    assert_eq!(device.driver.desc, device_2.driver.desc);
+}
+
 #[test]
 fn test_i915_gpu_get_version() {
     let device = i915::find_device();

tests/tests_raw.rs

@@ -6,12 +6,15 @@ use nix::{self};
 #[test]
 fn test_raw_drm_version() {
     // TODO more robust render node detection
-    let fd = nix::fcntl::open("/dev/dri/renderD129", nix::fcntl::OFlag::O_RDWR | nix::fcntl::OFlag::O_CLOEXEC, nix::sys::stat::Mode::empty())
-        .expect("Failed to open /dev/dri/renderD129");
+    let fd = nix::fcntl::open("/dev/dri/renderD128", nix::fcntl::OFlag::O_RDWR | nix::fcntl::OFlag::O_CLOEXEC, nix::sys::stat::Mode::empty())
+        .expect("Failed to open /dev/dri/renderD128");
     unsafe {
         let name_vec = libc::malloc(128);
+        libc::memset(name_vec, 0, 128);
         let date_vec = libc::malloc(128);
+        libc::memset(date_vec, 0, 128);
         let desc_vec = libc::malloc(128);
+        libc::memset(desc_vec, 0, 128);
 
         let mut version = native::drm_version { 
             version_major: 0,
@@ -37,8 +40,8 @@ fn test_raw_drm_version() {
 
 #[test]
 fn test_i915_raw_query() {
-    let fd = nix::fcntl::open("/dev/dri/renderD129", nix::fcntl::OFlag::O_RDWR | nix::fcntl::OFlag::O_CLOEXEC, nix::sys::stat::Mode::empty())
-        .expect("Failed to open /dev/dri/renderD129");
+    let fd = nix::fcntl::open("/dev/dri/renderD128", nix::fcntl::OFlag::O_RDWR | nix::fcntl::OFlag::O_CLOEXEC, nix::sys::stat::Mode::empty())
+        .expect("Failed to open /dev/dri/renderD128");
     unsafe {
         let mut query_item = native::drm_i915_query_item {
             query_id: native::DRM_I915_QUERY_ENGINE_INFO as u64,
@@ -54,13 +57,13 @@ fn test_i915_raw_query() {
         assert!(libc::ioctl(fd, native::DRM_IOCTL_I915_QUERY, &mut query) == 0);
         let engine_info = libc::malloc(query_item.length as usize)
             as *mut native::drm_i915_query_engine_info;
+        libc::memset(engine_info as *mut c_void, 0, query_item.length as usize);
         query_item.data_ptr = engine_info as u64;
         assert!(libc::ioctl(fd, native::DRM_IOCTL_I915_QUERY, &mut query) == 0);
-        println!("engine_info: {:?}", *engine_info);
         let engine_data = engine_info.as_mut().unwrap();
         let engines = engine_data.engines.as_mut_slice(engine_data.num_engines as usize);
         for engine in engines {
-            println!("engine: {:?}", engine);
+            assert!(engine.engine.engine_class != uapi::i915::EngineClass::Invalid as u16);
         }
     }
 }

tests/tests_uapi.rs

@@ -3,18 +3,42 @@
 use intel_gpu_uapi::*;
 use uapi::i915;
 use std::fs;
-use std::{fs::File, os::fd::AsRawFd};
+use std::{fs::File, os::fd::{AsRawFd, RawFd}};
 
 #[test]
 fn test_i915_uapi_get_version() {
     let node = i915::find_node().expect("Failed to find i915 fd");
-    let drm_version = uapi::get_drm_version(node.fd.as_raw_fd()).expect("Failed to get drm version");
-    println!("{:?}", drm_version);
+    let _drm_version = uapi::get_drm_version(node.fd.as_raw_fd()).expect("Failed to get drm version");
 }
 
 #[test]
 fn test_i915_uapi_get_engines() {
+    let node = i915::find_node().expect("Failed to find i915 fd");
+    let _engines = i915::get_engines(node.fd.as_raw_fd()).expect("Failed to get engines");
+    let fail_fd = File::open("/dev/null").expect("Failed to open /dev/null");
+    assert!(i915::get_engines(fail_fd.as_raw_fd()).is_none());
+}
+
+#[test]
+fn test_i915_uapi_get_param_fail() {
+    let fd = File::open("/dev/null").expect("Failed to open /dev/null");
+    let param = i915::get_param(fd.as_raw_fd(), native::I915_PARAM_CHIPSET_ID as i32);
+    assert!(param.is_none());
+}
+
+#[test]
+fn test_i915_uapi_native_engine_info() {
     let node = i915::find_node().expect("Failed to find i915 fd");
     let engines = i915::get_engines(node.fd.as_raw_fd()).expect("Failed to get engines");
-    println!("{:?}", engines);
+    for engine in engines {
+        let native_engine = engine.to_native();
+        let from_native = i915::EngineInfo::from_native(native_engine);
+        assert_eq!(&engine, &from_native);
+    }
+}
+
+#[test]
+fn test_i915_find_fd() {
+    let fd = i915::find_fd().expect("Failed to find i915 fd");
+    let _drm_version = uapi::get_drm_version(fd.as_raw_fd()).expect("Failed to get drm version");
 }