[igt-dev] [RFC v2 05/43] lib/i915: Helper func for engine class to exec_flag

[Ramalingam C <ramalingam.c@intel.com>]

Helper function is defined to get the execbuf flag for a engine of a
class mapped for a ctx.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 lib/i915/gem_engine_topology.c | 22 ++++++++++++++++++++++
 lib/i915/gem_engine_topology.h |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/lib/i915/gem_engine_topology.c b/lib/i915/gem_engine_topology.c
index fdd1b951672b..c64f7a4d05bb 100644
--- a/lib/i915/gem_engine_topology.c
+++ b/lib/i915/gem_engine_topology.c
@@ -289,3 +289,25 @@ bool gem_has_engine_topology(int fd)
 
 	return !__gem_context_get_param(fd, &param);
 }
+
+/* Return -EINVAL when the Engine with mentioned class is not found */
+int gem_engine_class_to_execbuf_flags(int fd, uint32_t ctx_id, int class)
+{
+	const struct intel_execution_engine2 *e;
+	DEFINE_CONTEXT_ENGINES_PARAM(engines, param, ctx_id, GEM_MAX_ENGINES);
+	int i;
+
+	if (gem_topology_get_param(fd, &param)) {
+		__for_each_static_engine(e) {
+			if (e->class == class)
+				return e->flags;
+		}
+		return -EINVAL;
+	}
+
+	for (i = 0; i < param.size; i++)
+		if (engines.engines[i].engine_class == class)
+			return i;
+
+	return -EINVAL;
+}
diff --git a/lib/i915/gem_engine_topology.h b/lib/i915/gem_engine_topology.h
index 2415fd1e379b..aa934622cab0 100644
--- a/lib/i915/gem_engine_topology.h
+++ b/lib/i915/gem_engine_topology.h
@@ -53,6 +53,8 @@ int gem_context_lookup_engine(int fd, uint64_t engine, uint32_t ctx_id,
 
 void gem_context_set_all_engines(int fd, uint32_t ctx);
 
+int gem_engine_class_to_execbuf_flags(int fd, uint32_t ctx_id, int class);
+
 #define __for_each_static_engine(e__) \
 	for ((e__) = intel_execution_engines2; (e__)->name; (e__)++)
 
-- 
2.19.1

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