[igt-dev] [RFC PATCH v9 3/5] lib/igt_gt: use for_each_engine2 to loop through engines

[Andi Shyti via igt-dev <igt-dev@lists.freedesktop.org>]

'for_each_engine2()' defines a loop through the gpu engines.

It can work with both active and pre-defined engines.

In case we are looping through active engines (i.e. the running
kernel has the query and get/setparam ioctls), the
intel_active_engines2 points to an array that contains only the
list engines dynamically allocated after having interrogated the
driver.

While, if we are looping through pre-defined engines,
intel_active_engines2 points to the 'intel_execution_engines2'
array and works exactly as for_each_engine() but using the
new 'struct intel_execution_engine2' data type.

Signed-off-by: Andi Shyti <andi.shyti@intel.com>
---
 lib/igt_gt.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/igt_gt.h b/lib/igt_gt.h
index f4bd6c22a81a..39e3a927191c 100644
--- a/lib/igt_gt.h
+++ b/lib/igt_gt.h
@@ -30,6 +30,8 @@
 
 #include "i915_drm.h"
 
+#include "i915/gem_query.h"
+
 void igt_require_hang_ring(int fd, int ring);
 
 typedef struct igt_hang {
@@ -86,6 +88,12 @@ extern const struct intel_execution_engine {
 	     e__++) \
 		for_if (gem_ring_has_physical_engine(fd__, flags__ = e__->exec_id | e__->flags))
 
+#define for_each_engine2(fd, ctx, e) \
+		for (__set_ctx_engine_map(fd, ctx_id), \
+		     e = intel_active_engines2; e->name; e++) \
+			for_if (gem_can_query() || \
+				gem_has_engine(fd, e->class, e->instance))
+
 bool gem_ring_is_physical_engine(int fd, unsigned int ring);
 bool gem_ring_has_physical_engine(int fd, unsigned int ring);
 
-- 
2.20.1

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