Hi,
On 2023/7/10 15:47, Maxime Ripard wrote:
As we get more and more tests, the locking context initialisation
creates more and more boilerplate, both at creation and destruction.
Let's create a helper that will allocate, initialise a context, and
register kunit actions to clean up once the test is done.
Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
---
drivers/gpu/drm/tests/drm_kunit_helpers.c | 41 +++++++++++++++++++++++++++++++
include/drm/drm_kunit_helpers.h | 2 ++
2 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.c b/drivers/gpu/drm/tests/drm_kunit_helpers.c
index 38211fea9ae6..40a27c78d692 100644
--- a/drivers/gpu/drm/tests/drm_kunit_helpers.c
+++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c
@@ -124,5 +124,46 @@ __drm_kunit_helper_alloc_drm_device_with_driver(struct kunit *test,
}
EXPORT_SYMBOL_GPL(__drm_kunit_helper_alloc_drm_device_with_driver);
+static void action_drm_release_context(void *ptr)
+{
+ struct drm_modeset_acquire_ctx *ctx = ptr;
+
+ drm_modeset_drop_locks(ctx);
+ drm_modeset_acquire_fini(ctx);
+}
+
+/**
+ * drm_kunit_helper_context_alloc - Allocates an acquire context
+ * @test: The test context object
+ *
+ * Allocates and initializes a modeset acquire context.
+ *
+ * The context is tied to the kunit test context, so we must not call
+ * drm_modeset_acquire_fini() on it, it will be done so automatically.
+ *
+ * Returns:
+ * An ERR_PTR on error, a pointer to the newly allocated context otherwise
+ */
+struct drm_modeset_acquire_ctx *
+drm_kunit_helper_acquire_ctx_alloc(struct kunit *test)
+{
+ struct drm_modeset_acquire_ctx *ctx;
+ int ret;
+
+ ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
Because kunit_kzalloc() is also managed,
Is there any possibility that kfree(ctx) get called before
action_drm_release_context(ctx) ?
Currently, I can't find where the order is guaranteed.
+ KUNIT_ASSERT_NOT_NULL(test, ctx);
+
+ drm_modeset_acquire_init(ctx, 0);
+
+ ret = kunit_add_action_or_reset(test,
+ action_drm_release_context,
+ ctx);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return ctx;
+}
+EXPORT_SYMBOL_GPL(drm_kunit_helper_acquire_ctx_alloc);
+
MODULE_AUTHOR("Maxime Ripard <maxime@xxxxxxxxxx>");
MODULE_LICENSE("GPL");
diff --git a/include/drm/drm_kunit_helpers.h b/include/drm/drm_kunit_helpers.h
index ed013fdcc1ff..4ba5e10653c6 100644
--- a/include/drm/drm_kunit_helpers.h
+++ b/include/drm/drm_kunit_helpers.h
@@ -87,5 +87,7 @@ __drm_kunit_helper_alloc_drm_device(struct kunit *test,
sizeof(_type), \
offsetof(_type, _member), \
_feat))
+struct drm_modeset_acquire_ctx *
+drm_kunit_helper_acquire_ctx_alloc(struct kunit *test);
#endif // DRM_KUNIT_HELPERS_H_
