[PATCH 06/12] drm/i915/selftests: Use a coherent map to setup scratch batch buffers

[Tvrtko Ursulin]

From: Chris Wilson <chris at chris-wilson.co.uk>

Instead of manipulating the object's cache domain, just use the device
coherent map to write the batch buffer.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 .../drm/i915/gem/selftests/i915_gem_context.c    | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index ce70d0a3afb2..3d8d5f242e34 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -1622,7 +1622,7 @@ static int read_from_scratch(struct i915_gem_context *ctx,
 		if (err)
 			goto out_vm;
 
-		cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
+		cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC);
 		if (IS_ERR(cmd)) {
 			err = PTR_ERR(cmd);
 			goto out;
@@ -1658,7 +1658,7 @@ static int read_from_scratch(struct i915_gem_context *ctx,
 		if (err)
 			goto out_vm;
 
-		cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
+		cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC);
 		if (IS_ERR(cmd)) {
 			err = PTR_ERR(cmd);
 			goto out;
@@ -1707,15 +1707,17 @@ static int read_from_scratch(struct i915_gem_context *ctx,
 
 	i915_vma_unpin(vma);
 
+	i915_request_get(rq);
 	i915_request_add(rq);
 
-	i915_gem_object_lock(obj, NULL);
-	err = i915_gem_object_set_to_cpu_domain(obj, false);
-	i915_gem_object_unlock(obj);
-	if (err)
+	if (i915_request_wait(rq, 0, HZ / 5) < 0) {
+		i915_request_put(rq);
+		err = -ETIME;
 		goto out_vm;
+	}
+	i915_request_put(rq);
 
-	cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
+	cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC);
 	if (IS_ERR(cmd)) {
 		err = PTR_ERR(cmd);
 		goto out_vm;
-- 
2.30.2