rusticl: advertise conformance on 12th Intel iGPUs

Submission can be found here:
https://www.khronos.org/conformance/adopters/conformant-products/opencl#submission_405

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Hard-reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Acked-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19699>

src/gallium/drivers/iris/iris_screen.c

@@ -143,6 +143,19 @@ iris_get_name(struct pipe_screen *pscreen)
    return buf;
 }
 
+static const char *
+iris_get_cl_cts_version(struct pipe_screen *pscreen)
+{
+   struct iris_screen *screen = (struct iris_screen *)pscreen;
+   const struct intel_device_info *devinfo = &screen->devinfo;
+
+   /* https://www.khronos.org/conformance/adopters/conformant-products/opencl#submission_405 */
+   if (devinfo->verx10 == 120)
+      return "v2022-04-22-00";
+
+   return NULL;
+}
+
 static int
 iris_get_video_memory(struct iris_screen *screen)
 {
@@ -867,6 +880,7 @@ iris_screen_create(int fd, const struct pipe_screen_config *config)
    pscreen->get_name = iris_get_name;
    pscreen->get_vendor = iris_get_vendor;
    pscreen->get_device_vendor = iris_get_device_vendor;
+   pscreen->get_cl_cts_version = iris_get_cl_cts_version;
    pscreen->get_param = iris_get_param;
    pscreen->get_shader_param = iris_get_shader_param;
    pscreen->get_compute_param = iris_get_compute_param;

src/gallium/frontends/rusticl/api/device.rs

@@ -89,7 +89,9 @@ impl CLInfo<cl_device_info> for cl_device_id {
             CL_DEVICE_IMAGE3D_MAX_HEIGHT => cl_prop::<usize>(dev.image_3d_size()),
             CL_DEVICE_IMAGE3D_MAX_WIDTH => cl_prop::<usize>(dev.image_3d_size()),
             CL_DEVICE_IMAGE3D_MAX_DEPTH => cl_prop::<usize>(dev.image_3d_size()),
-            CL_DEVICE_LATEST_CONFORMANCE_VERSION_PASSED => cl_prop::<&str>("v0000-01-01-00"),
+            CL_DEVICE_LATEST_CONFORMANCE_VERSION_PASSED => {
+                cl_prop::<&CStr>(dev.screen().cl_cts_version())
+            }
             CL_DEVICE_LINKER_AVAILABLE => cl_prop::<bool>(true),
             CL_DEVICE_LOCAL_MEM_SIZE => cl_prop::<cl_ulong>(dev.local_mem_size()),
             // TODO add query for CL_LOCAL vs CL_GLOBAL

src/gallium/frontends/rusticl/mesa/pipe/screen.rs

@@ -8,6 +8,7 @@ use mesa_rust_gen::*;
 use mesa_rust_util::string::*;
 
 use std::convert::TryInto;
+use std::ffi::CStr;
 use std::mem::size_of;
 use std::os::raw::c_void;
 use std::ptr;
@@ -238,6 +239,24 @@ impl PipeScreen {
         unsafe { *self.ldev.ldev }.type_
     }
 
+    pub fn cl_cts_version(&self) -> &CStr {
+        unsafe {
+            let s = *self.screen;
+
+            let ptr = s
+                .get_cl_cts_version
+                .map_or(ptr::null(), |get_cl_cts_version| {
+                    get_cl_cts_version(self.screen)
+                });
+            if ptr.is_null() {
+                // this string is good enough to pass the CTS
+                CStr::from_bytes_with_nul(b"v0000-01-01-00\0").unwrap()
+            } else {
+                CStr::from_ptr(ptr)
+            }
+        }
+    }
+
     pub fn is_format_supported(
         &self,
         format: pipe_format,

src/gallium/include/pipe/p_screen.h

@@ -112,6 +112,13 @@ struct pipe_screen {
     */
    const char *(*get_device_vendor)(struct pipe_screen *);
 
+   /**
+    * Returns the latest OpenCL CTS version passed
+    *
+    * The returned value should be the git tag used when passing conformance.
+    */
+   const char *(*get_cl_cts_version)(struct pipe_screen *);
+
    /**
     * Query an integer-valued capability/parameter/limit
     * \param param  one of PIPE_CAP_x