Second retroactive test, make sure that the waiters are removed from the
global wait-tree when their seqno completes.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
---
drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c | 107 +++++++++++++++++++++
drivers/gpu/drm/i915/selftests/mock_engine.h | 6 ++
2 files changed, 113 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
b/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
index 23b09fd5d3aa..e9dff6eee323 100644
--- a/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
@@ -64,6 +64,27 @@ static int check_rbtree(struct intel_engine_cs *engine,
return 0;
}
+static int check_completion(struct intel_engine_cs *engine,
+ const unsigned long *bitmap,
+ const struct intel_wait *waiters,
+ const int count)
+{
+ int n;
+
+ for (n = 0; n < count; n++) {
+ if (intel_wait_complete(&waiters[n]) != !!test_bit(n, bitmap))
+ continue;
+
+ pr_err("waiter[%d, seqno=%d] is %s, but expected %s\n",
+ n, waiters[n].seqno,
+ intel_wait_complete(&waiters[n]) ? "complete" : "active",
+ test_bit(n, bitmap) ? "active" : "complete");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int check_rbtree_empty(struct intel_engine_cs *engine)
{
struct intel_breadcrumbs *b = &engine->breadcrumbs;
@@ -157,10 +178,96 @@ static int igt_random_insert_remove(void *arg)
return err;
}
+static int igt_insert_complete(void *arg)
+{
+ const u32 seqno_bias = 0x1000;
+ struct intel_engine_cs *engine = arg;
+ struct intel_wait *waiters;
+ const int count = 4096;
+ unsigned long *bitmap;
+ int err = -ENOMEM;
+ int n, m;
+
+ mock_engine_reset(engine);
+
+ waiters = drm_malloc_gfp(count, sizeof(*waiters), GFP_TEMPORARY);
+ if (!waiters)
+ goto out_engines;
+
+ bitmap = kcalloc(DIV_ROUND_UP(count, BITS_PER_LONG), sizeof(*bitmap),
+ GFP_TEMPORARY);
+ if (!bitmap)
+ goto out_waiters;
+
+ for (n = 0; n < count; n++) {
+ intel_wait_init(&waiters[n], n + seqno_bias);
+ intel_engine_add_wait(engine, &waiters[n]);
+ __set_bit(n, bitmap);
+ }
+ err = check_rbtree(engine, bitmap, waiters, count);
+ if (err)
+ goto err;
+
+ /* On each step, we advance the seqno so that several waiters are then
+ * complete (we increase the seqno by increasingly larger values to
+ * retire more and more waiters at once). All retired waiters should
+ * be woken and removed from the rbtree, and so that we check.
+ */
+ for (n = 0; n < count; n = m) {
+ int seqno = 2 * n;
+
+ GEM_BUG_ON(find_first_bit(bitmap, count) != n);
+
+ if (intel_wait_complete(&waiters[n])) {
+ pr_err("waiter[%d, seqno=%d] completed too early\n",
+ n, waiters[n].seqno);
+ err = -EINVAL;
+ goto err;
+ }
+
+ /* complete the following waiters */
+ mock_seqno_advance(engine, seqno + seqno_bias);
+ for (m = n; m <= seqno; m++) {
+ if (m == count)
+ break;
+
+ GEM_BUG_ON(!test_bit(m, bitmap));
+ __clear_bit(m, bitmap);
+ }
+
+ intel_engine_remove_wait(engine, &waiters[n]);
+ RB_CLEAR_NODE(&waiters[n].node);
+
+ err = check_rbtree(engine, bitmap, waiters, count);
+ if (err) {
+ pr_err("rbtree corrupt after seqno advance to %d\n",
+ seqno + seqno_bias);
+ goto err;
+ }
+
+ err = check_completion(engine, bitmap, waiters, count);
+ if (err) {
+ pr_err("completions after seqno advance to %d failed\n",
+ seqno + seqno_bias);
+ goto err;
+ }
+ }
+
+ err = check_rbtree_empty(engine);
+err:
+ kfree(bitmap);
+out_waiters:
+ drm_free_large(waiters);
+out_engines:
+ mock_engine_flush(engine);
+ return err;
+}
+
int intel_breadcrumbs_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_random_insert_remove),
+ SUBTEST(igt_insert_complete),
};
struct intel_engine_cs *engine;
int err;
diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.h
b/drivers/gpu/drm/i915/selftests/mock_engine.h
index 0ae9a94aaa1e..9cfe9671f860 100644
--- a/drivers/gpu/drm/i915/selftests/mock_engine.h
+++ b/drivers/gpu/drm/i915/selftests/mock_engine.h
@@ -29,4 +29,10 @@ struct intel_engine_cs *mock_engine(const char *name);
void mock_engine_flush(struct intel_engine_cs *engine);
void mock_engine_reset(struct intel_engine_cs *engine);
+static inline void mock_seqno_advance(struct intel_engine_cs *engine, u32
seqno)
+{
+ intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno);
+ intel_engine_wakeup(engine);
+}
+
#endif /* !__MOCK_ENGINE_H__ */
--
2.11.0
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