On 4/10/2024 13:15, Daniele Ceraolo Spurio wrote:
On DG2, submissions to VCS engines tied to a gem context are blocked
until the HuC is loaded. Since some selftests do use a gem context,
wait for the HuC load to complete before running the tests to avoid
contamination.
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10564
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
.../gpu/drm/i915/selftests/i915_selftest.c | 36 ++++++++++++++++---
1 file changed, 32 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/selftests/i915_selftest.c b/drivers/gpu/drm/i915/selftests/i915_selftest.c
index ee79e0809a6d..fee76c1d2f45 100644
--- a/drivers/gpu/drm/i915/selftests/i915_selftest.c
+++ b/drivers/gpu/drm/i915/selftests/i915_selftest.c
@@ -154,6 +154,30 @@ __wait_gsc_proxy_completed(struct drm_i915_private *i915)
pr_warn(DRIVER_NAME "Timed out waiting for gsc_proxy_completion!\n");
}
+static void
+__wait_gsc_huc_load_completed(struct drm_i915_private *i915)
+{
+ /* this only applies to DG2, so we only care about GT0 */
+ struct intel_huc *huc = &to_gt(i915)->uc.huc;
+ bool need_to_wait = (IS_ENABLED(CONFIG_INTEL_MEI_PXP) &&
+ intel_huc_wait_required(huc));
+ /*
+ * The GSC and PXP mei bringup depends on the kernel boot ordering, so
+ * to account for the worst case scenario the HuC code waits for up to
+ * 10s for the GSC driver to load and then another 5s for the PXP
+ * component to bind before giving up, even though those steps normally
+ * complete in less than a second from the i915 load. We match that
+ * timeout here, but we expect to bail early due to the fence being
+ * signalled even in a failure case, as it is extremely unlikely that
+ * both components will use their full timeout.
+ */
+ unsigned long timeout_ms = 15000;
+
+ if (need_to_wait &&
+ wait_for(i915_sw_fence_done(&huc->delayed_load.fence), timeout_ms))
+ pr_warn(DRIVER_NAME "Timed out waiting for huc load via GSC!\n");
+}
+
static int __run_selftests(const char *name,
struct selftest *st,
unsigned int count,
@@ -228,14 +252,16 @@ int i915_mock_selftests(void)
int i915_live_selftests(struct pci_dev *pdev)
{
+ struct drm_i915_private *i915 = pdev_to_i915(pdev);
int err;
if (!i915_selftest.live)
return 0;
- __wait_gsc_proxy_completed(pdev_to_i915(pdev));
+ __wait_gsc_proxy_completed(i915);
+ __wait_gsc_huc_load_completed(i915);
- err = run_selftests(live, pdev_to_i915(pdev));
+ err = run_selftests(live, i915);
if (err) {
i915_selftest.live = err;
return err;
@@ -251,14 +277,16 @@ int i915_live_selftests(struct pci_dev *pdev)
int i915_perf_selftests(struct pci_dev *pdev)
{
+ struct drm_i915_private *i915 = pdev_to_i915(pdev);
int err;
if (!i915_selftest.perf)
return 0;
- __wait_gsc_proxy_completed(pdev_to_i915(pdev));
+ __wait_gsc_proxy_completed(i915);
+ __wait_gsc_huc_load_completed(i915);
- err = run_selftests(perf, pdev_to_i915(pdev));
+ err = run_selftests(perf, i915);
if (err) {
i915_selftest.perf = err;
return err;
