intel-gpu-rs/tests/tests_raw.rs

use intel_gpu_uapi::*;
use std::ffi::c_void;
use std::ffi::CStr;
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");
    unsafe {
        let name_vec = libc::malloc(128);
        let date_vec = libc::malloc(128);
        let desc_vec = libc::malloc(128);
        
        let mut version = native::drm_version { 
            version_major: 0,
            version_minor: 0,
            version_patchlevel: 0,
            name: name_vec as *mut i8,
            date: date_vec as *mut i8,
            desc: desc_vec as *mut i8,
            name_len: 128,
            date_len: 128,
            desc_len: 128,
        };
        assert!(libc::ioctl(fd, native::DRM_IOCTL_VERSION, &mut version) == 0);
        println!("version_major: {}, version_minor: {}, version_patchlevel: {}, name: {:?}, date: {:?}, desc: {:?}", 
            version.version_major, 
            version.version_minor, 
            version.version_patchlevel, 
            CStr::from_ptr(version.name), 
            CStr::from_ptr(version.date), 
            CStr::from_ptr(version.desc));
    }
}

#[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");
    unsafe {
        let mut query_item = native::drm_i915_query_item {
            query_id: native::DRM_I915_QUERY_ENGINE_INFO as u64,
            length: 0,
            data_ptr: core::ptr::null_mut::<c_void>() as u64,
            flags: 0,
        };
        let mut query = native::drm_i915_query {
            items_ptr: (&mut query_item) as *mut native::drm_i915_query_item as u64,
            num_items: 1,
            flags: 0,
        };
        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;
        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);
        }
    }
}