On 07/12/2016 13:58, Chris Wilson wrote:
Second retroactive test, make sure that the waiters are removed from the
global wait-tree when their seqno completes.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_breadcrumbs.c | 110 +++++++++++++++++++++++++++++++
1 file changed, 110 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c
index c768608974e1..fc950f7ff322 100644
--- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
@@ -705,6 +705,12 @@ static struct intel_engine_cs *mock_engine(const char *name)
return engine;
}
+static 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);
+}
+
static int *get_random_order(int count)
{
int *order;
@@ -766,6 +772,27 @@ 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;
@@ -857,10 +884,93 @@ static int igt_random_insert_remove(void *ignore)
return err;
}
+static int igt_insert_complete(void *ignore)
+{
+ struct intel_engine_cs *engine;
+ struct intel_wait *waiters;
+ const int count = 4096;
+ unsigned long *bitmap;
+ int err = -ENOMEM;
+ int n, m;
+
+ engine = mock_engine("mock");
+ if (!engine)
+ goto out;
+
+ 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 + 0x1000);
Maybe const int seqno_start = 0x1000 since there are multiple users.
+ intel_engine_add_wait(engine, &waiters[n]);
+ __set_bit(n, bitmap);
+ }
+ err = check_rbtree(engine, bitmap, waiters, count);
+ if (err)
+ goto err;
+
+ 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 + 0x1000);
+ 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 + 0x1000);
+ goto err;
+ }
+
+ err = check_completion(engine, bitmap, waiters, count);
+ if (err) {
+ pr_err("completions after seqno advance to %d failed\n",
+ seqno + 0x1000);
+ goto err;
+ }
+ }
+
+ err = check_rbtree_empty(engine);
+err:
+ kfree(bitmap);
+out_waiters:
+ drm_free_large(waiters);
+out_engines:
+ kfree(engine);
+out:
+ return err;
+}
+
int intel_breadcrumbs_selftest(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_random_insert_remove),
+ SUBTEST(igt_insert_complete),
};
return i915_subtests(tests, NULL);
Looks OK.
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Regards,
Tvrtko
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