A quick test to verify that the backend accepts each type of timeline
and can use them to track and control request emission.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/selftest_timeline.c | 105 ++++++++++++++++++++
1 file changed, 105 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c
b/drivers/gpu/drm/i915/gt/selftest_timeline.c
index 6b412228a6fd..dcc03522b277 100644
--- a/drivers/gpu/drm/i915/gt/selftest_timeline.c
+++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c
@@ -1364,9 +1364,114 @@ static int live_hwsp_recycle(void *arg)
return err;
}
+static int live_hwsp_relative(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ /*
+ * Check backend support for different timeline modes.
+ */
+
+ for_each_engine(engine, gt, id) {
+ enum intel_timeline_mode mode;
+
+ if (!intel_engine_has_scheduler(engine))
+ continue;
+
+ for (mode = INTEL_TIMELINE_ABSOLUTE;
+ mode <= INTEL_TIMELINE_RELATIVE_ENGINE;
+ mode++) {
+ struct intel_timeline *tl;
+ struct i915_request *rq;
+ struct intel_context *ce;
+ const char *msg;
+ int err;
+
+ if (mode == INTEL_TIMELINE_RELATIVE_CONTEXT &&
+ !HAS_EXECLISTS(gt->i915))
+ continue;
+
+ ce = intel_context_create(engine);
+ if (IS_ERR(ce))
+ return PTR_ERR(ce);
+
+ err = intel_context_alloc_state(ce);
+ if (err) {
+ intel_context_put(ce);
+ return err;
+ }
+
+ switch (mode) {
+ case INTEL_TIMELINE_ABSOLUTE:
+ tl = intel_timeline_create(gt);
+ msg = "local";
+ break;
+
+ case INTEL_TIMELINE_RELATIVE_CONTEXT:
+ tl = __intel_timeline_create(gt,
+ ce->state,
+
INTEL_TIMELINE_RELATIVE_CONTEXT |
+ 0x400);
+ msg = "ppHWSP";
+ break;
+
+ case INTEL_TIMELINE_RELATIVE_ENGINE:
+ tl = __intel_timeline_create(gt,
+
engine->status_page.vma,
+ 0x400);
+ msg = "HWSP";
+ break;
+ default:
+ continue;
+ }
+ if (IS_ERR(tl)) {
+ intel_context_put(ce);
+ return PTR_ERR(tl);
+ }
+
+ pr_info("Testing %s timeline on %s\n",
+ msg, engine->name);
+
+ intel_timeline_put(ce->timeline);
+ ce->timeline = tl;
+
+ err = intel_timeline_pin(tl, NULL);
+ if (err) {
+ intel_context_put(ce);
+ return err;
+ }
+ tl->seqno = 0xc0000000;
+ WRITE_ONCE(*(u32 *)tl->hwsp_seqno, tl->seqno);
+ intel_timeline_unpin(tl);
+
+ rq = intel_context_create_request(ce);
+ intel_context_put(ce);
+ if (IS_ERR(rq))
+ return PTR_ERR(rq);
+
+ GEM_BUG_ON(rcu_access_pointer(rq->timeline) != tl);
+
+ i915_request_get(rq);
+ i915_request_add(rq);
+
+ if (i915_request_wait(rq, 0, HZ / 5) < 0) {
+ i915_request_put(rq);
+ return -EIO;
+ }
+
+ i915_request_put(rq);
+ }
+ }
+
+ return 0;
+}
+
int intel_timeline_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
+ SUBTEST(live_hwsp_relative),
SUBTEST(live_hwsp_recycle),
SUBTEST(live_hwsp_engine),
SUBTEST(live_hwsp_alternate),
--
2.20.1
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