Include whether the scheduler is using HW semaphore assistance in our
pretty debug strings, and make the caps known for requires.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
lib/i915/gem_scheduler.c | 16 ++++++++++++++++
lib/i915/gem_scheduler.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/lib/i915/gem_scheduler.c b/lib/i915/gem_scheduler.c
index 8e5e60311..cd14622d6 100644
--- a/lib/i915/gem_scheduler.c
+++ b/lib/i915/gem_scheduler.c
@@ -117,6 +117,20 @@ bool gem_scheduler_has_pmu_support(int fd)
LOCAL_I915_SCHEDULER_CAP_PMU;
}
+/**
+ * gem_scheduler_has_semaphores:
+ * @fd: open i915 drm file descriptor
+ *
+ * Feature test macro to query whether the driver supports using HW semaphores
+ * to schedule dependencies in parallel (using the HW to delay execution until
+ * ready to reduce latency).
+ */
+bool gem_scheduler_has_semaphores(int fd)
+{
+ return gem_scheduler_capability(fd) &
+ LOCAL_I915_SCHEDULER_CAP_SEMAPHORES;
+}
+
/**
* gem_scheduler_print_capability:
* @fd: open i915 drm file descriptor
@@ -135,6 +149,8 @@ void gem_scheduler_print_capability(int fd)
igt_info(" - With priority sorting\n");
if (caps & LOCAL_I915_SCHEDULER_CAP_PREEMPTION)
igt_info(" - With preemption enabled\n");
+ if (caps & LOCAL_I915_SCHEDULER_CAP_SEMAPHORES)
+ igt_info(" - With HW semaphores enabled\n");
if (caps & LOCAL_I915_SCHEDULER_CAP_PMU)
igt_info(" - With PMU support\n");
}
diff --git a/lib/i915/gem_scheduler.h b/lib/i915/gem_scheduler.h
index d57f08dad..32778e7dd 100644
--- a/lib/i915/gem_scheduler.h
+++ b/lib/i915/gem_scheduler.h
@@ -28,12 +28,14 @@
#define LOCAL_I915_SCHEDULER_CAP_PRIORITY (1 << 1)
#define LOCAL_I915_SCHEDULER_CAP_PREEMPTION (1 << 2)
#define LOCAL_I915_SCHEDULER_CAP_PMU (1 << 3)
+#define LOCAL_I915_SCHEDULER_CAP_SEMAPHORES (1 << 4)
unsigned gem_scheduler_capability(int fd);
bool gem_scheduler_enabled(int fd);
bool gem_scheduler_has_ctx_priority(int fd);
bool gem_scheduler_has_preemption(int fd);
bool gem_scheduler_has_pmu_support(int fd);
+bool gem_scheduler_has_semaphores(int fd);
void gem_scheduler_print_capability(int fd);
#endif /* GEM_SCHEDULER_H */
--
2.20.1
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