Re: [Intel-gfx] [PATCH 46/51] drm/i915/selftest: Fix MOCS selftest for GuC submission

Matthew Brost
2021-07-16T23:57:25Z

On Fri, Jul 16, 2021 at 01:17:19PM -0700, Matthew Brost wrote:
> From: Rahul Kumar Singh <rahul.kumar.singh@intel.com>
>
> When GuC submission is enabled, the GuC controls engine resets. Rather
> than explicitly triggering a reset, the driver must submit a hanging
> context to GuC and wait for the reset to occur.
>
> Signed-off-by: Rahul Kumar Singh <rahul.kumar.singh@intel.com>
> Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
> Signed-off-by: Matthew Brost <matthew.brost@intel.com>
> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
> Cc: Matthew Brost <matthew.brost@intel.com>

Reviewed-by: Matthew Brost <matthew.brost@intel.com>

> ---
> drivers/gpu/drm/i915/gt/selftest_mocs.c | 49 ++++++++++++++++++-------
> 1 file changed, 35 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_mocs.c b/drivers/gpu/drm/i915/gt/selftest_mocs.c
> index 8763bbeca0f7..b7314739ee40 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_mocs.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_mocs.c
> @@ -10,6 +10,7 @@
> #include "gem/selftests/mock_context.h"
> #include "selftests/igt_reset.h"
> #include "selftests/igt_spinner.h"
> +#include "selftests/intel_scheduler_helpers.h"
>
> struct live_mocs {
> struct drm_i915_mocs_table table;
> @@ -318,7 +319,8 @@ static int live_mocs_clean(void *arg)
> }
>
> static int active_engine_reset(struct intel_context *ce,
> - const char *reason)
> + const char *reason,
> + bool using_guc)
> {
> struct igt_spinner spin;
> struct i915_request *rq;
> @@ -335,9 +337,13 @@ static int active_engine_reset(struct intel_context *ce,
> }
>
> err = request_add_spin(rq, &spin);
> - if (err == 0)
> + if (err == 0 && !using_guc)
> err = intel_engine_reset(ce->engine, reason);
>
> + /* Ensure the reset happens and kills the engine */
> + if (err == 0)
> + err = intel_selftest_wait_for_rq(rq);
> +
> igt_spinner_end(&spin);
> igt_spinner_fini(&spin);
>
> @@ -345,21 +351,23 @@ static int active_engine_reset(struct intel_context *ce,
> }
>
> static int __live_mocs_reset(struct live_mocs *mocs,
> - struct intel_context *ce)
> + struct intel_context *ce, bool using_guc)
> {
> struct intel_gt *gt = ce->engine->gt;
> int err;
>
> if (intel_has_reset_engine(gt)) {
> - err = intel_engine_reset(ce->engine, "mocs");
> - if (err)
> - return err;
> -
> - err = check_mocs_engine(mocs, ce);
> - if (err)
> - return err;
> + if (!using_guc) {
> + err = intel_engine_reset(ce->engine, "mocs");
> + if (err)
> + return err;
> +
> + err = check_mocs_engine(mocs, ce);
> + if (err)
> + return err;
> + }
>
> - err = active_engine_reset(ce, "mocs");
> + err = active_engine_reset(ce, "mocs", using_guc);
> if (err)
> return err;
>
> @@ -395,19 +403,32 @@ static int live_mocs_reset(void *arg)
>
> igt_global_reset_lock(gt);
> for_each_engine(engine, gt, id) {
> + bool using_guc = intel_engine_uses_guc(engine);
> + struct intel_selftest_saved_policy saved;
> struct intel_context *ce;
> + int err2;
> +
> + err = intel_selftest_modify_policy(engine, &saved);
> + if (err)
> + break;
>
> ce = mocs_context_create(engine);
> if (IS_ERR(ce)) {
> err = PTR_ERR(ce);
> - break;
> + goto restore;
> }
>
> intel_engine_pm_get(engine);
> - err = __live_mocs_reset(&mocs, ce);
> - intel_engine_pm_put(engine);
>
> + err = __live_mocs_reset(&mocs, ce, using_guc);
> +
> + intel_engine_pm_put(engine);
> intel_context_put(ce);
> +
> +restore:
> + err2 = intel_selftest_restore_policy(engine, &saved);
> + if (err == 0)
> + err = err2;
> if (err)
> break;
> }
> --
> 2.28.0