From bc7877660c7d7a733ec484e91e2096b8daf2cf0d Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 18 May 2017 12:11:59 +0100
Subject: lib: Refactor testing for ability to use MI_STORE_DATA_IMM

Rather than have the code in multiple locations, put a copy in lib/

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 lib/igt_gt.c | 18 ++++++++++++++++++
 lib/igt_gt.h |  1 +
 2 files changed, 19 insertions(+)

(limited to 'lib')

diff --git a/lib/igt_gt.c b/lib/igt_gt.c
index 25db02e9..11643edd 100644
--- a/lib/igt_gt.c
+++ b/lib/igt_gt.c
@@ -557,3 +557,21 @@ const struct intel_execution_engine intel_execution_engines[] = {
 	{ "vebox", "vecs0", I915_EXEC_VEBOX, 0 },
 	{ NULL, 0, 0 }
 };
+
+bool gem_can_store_dword(int fd, unsigned int engine)
+{
+	uint16_t devid = intel_get_drm_devid(fd);
+	const struct intel_device_info *info = intel_get_device_info(devid);
+	const int gen = ffs(info->gen);
+
+	if (gen <= 2) /* requires physical addresses */
+		return false;
+
+	if (gen == 6 && (engine & ~(3<<13)) == I915_EXEC_BSD)
+		return false; /* kills the machine! */
+
+	if (info->is_broadwater)
+		return false; /* Not sure yet... */
+
+	return true;
+}
diff --git a/lib/igt_gt.h b/lib/igt_gt.h
index 1ed833d2..2579cbd3 100644
--- a/lib/igt_gt.h
+++ b/lib/igt_gt.h
@@ -78,5 +78,6 @@ extern const struct intel_execution_engine {
 	     e__++) \
 		for_if (gem_has_ring(fd__, flags__ = e__->exec_id | e__->flags))
 
+bool gem_can_store_dword(int fd, unsigned int engine);
 
 #endif /* IGT_GT_H */
-- 
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