[Intel-gfx] [PATCH igt v3 1/2] lib/gt: Mark up engine classes

[Chris Wilson]

We introduce the concept of classes that each engine may belong to.
There may be more than one engine available in each class, but each
engine only belongs to one class. Each class has a unique set of
capabilities and purpose (e.g. 3D rendering or video decode), but
different engines within each class may have different features (e.g.
only the first decoder instance may have the full set of fixed function
blocks, but most of the work can still be offload onto the other decoders
which shared the same ISA etc).

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 lib/igt_gt.c | 16 ++++++++--------
 lib/igt_gt.h |  7 +++++++
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/lib/igt_gt.c b/lib/igt_gt.c
index 89727d22..e8272d29 100644
--- a/lib/igt_gt.c
+++ b/lib/igt_gt.c
@@ -578,14 +578,14 @@ unsigned intel_detect_and_clear_missed_interrupts(int fd)
 }
 
 const struct intel_execution_engine intel_execution_engines[] = {
-	{ "default", NULL, 0, 0 },
-	{ "render", "rcs0", I915_EXEC_RENDER, 0 },
-	{ "bsd", "vcs0", I915_EXEC_BSD, 0 },
-	{ "bsd1", "vcs0", I915_EXEC_BSD, 1<<13 /*I915_EXEC_BSD_RING1*/ },
-	{ "bsd2", "vcs1", I915_EXEC_BSD, 2<<13 /*I915_EXEC_BSD_RING2*/ },
-	{ "blt", "bcs0", I915_EXEC_BLT, 0 },
-	{ "vebox", "vecs0", I915_EXEC_VEBOX, 0 },
-	{ NULL, 0, 0 }
+	{ "default", NULL, 0, LOCAL_ENGINE_CLASS_OTHER, 0 },
+	{ "render", "rcs0", I915_EXEC_RENDER, LOCAL_ENGINE_CLASS_RENDER, 0 },
+	{ "bsd", "vcs0", I915_EXEC_BSD, LOCAL_ENGINE_CLASS_VIDEO, 0 },
+	{ "bsd1", "vcs0", I915_EXEC_BSD, LOCAL_ENGINE_CLASS_VIDEO, 1<<13 /*I915_EXEC_BSD_RING1*/ },
+	{ "bsd2", "vcs1", I915_EXEC_BSD, LOCAL_ENGINE_CLASS_VIDEO, 2<<13 /*I915_EXEC_BSD_RING2*/ },
+	{ "blt", "bcs0", I915_EXEC_BLT, LOCAL_ENGINE_CLASS_COPY, 0 },
+	{ "vebox", "vecs0", I915_EXEC_VEBOX, LOCAL_ENGINE_CLASS_VIDEO_ENHANCE, 0 },
+	{ NULL }
 };
 
 bool gem_can_store_dword(int fd, unsigned int engine)
diff --git a/lib/igt_gt.h b/lib/igt_gt.h
index 2579cbd3..264efce2 100644
--- a/lib/igt_gt.h
+++ b/lib/igt_gt.h
@@ -63,10 +63,17 @@ void igt_clflush_range(void *addr, int size);
 
 unsigned intel_detect_and_clear_missed_interrupts(int fd);
 
+#define LOCAL_ENGINE_CLASS_OTHER		0
+#define LOCAL_ENGINE_CLASS_RENDER		1
+#define LOCAL_ENGINE_CLASS_COPY			2
+#define LOCAL_ENGINE_CLASS_VIDEO		3
+#define LOCAL_ENGINE_CLASS_VIDEO_ENHANCE	4
+
 extern const struct intel_execution_engine {
 	const char *name;
 	const char *full_name;
 	unsigned exec_id;
+	unsigned class_id;
 	unsigned flags;
 } intel_execution_engines[];
 
-- 
2.15.0