diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index bdd13b79ba85..2c27b3491e28 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -5280,6 +5280,140 @@ static int live_lrc_isolation(void *arg) return 0; } +static void garbage_reset(struct intel_engine_cs *engine, + struct i915_request *rq) +{ + const unsigned int bit = I915_RESET_ENGINE + engine->id; + unsigned long *lock = &engine->gt->reset.flags; + + if (test_and_set_bit(bit, lock)) + return; + + tasklet_disable(&engine->execlists.tasklet); + + if (!rq->fence.error) + intel_engine_reset(engine, NULL); + + tasklet_enable(&engine->execlists.tasklet); + clear_and_wake_up_bit(bit, lock); +} + +static struct i915_request *garbage(struct intel_context *ce, + struct rnd_state *prng) +{ + struct i915_request *rq; + int err; + + err = intel_context_pin(ce); + if (err) + return ERR_PTR(err); + + prandom_bytes_state(prng, + ce->lrc_reg_state, + ce->engine->context_size - + LRC_STATE_PN * PAGE_SIZE); + + rq = intel_context_create_request(ce); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_unpin; + } + + i915_request_get(rq); + i915_request_add(rq); + return rq; + +err_unpin: + intel_context_unpin(ce); + return ERR_PTR(err); +} + +static int __lrc_garbage(struct intel_engine_cs *engine, struct rnd_state *prng) +{ + struct intel_context *ce; + struct i915_request *hang; + int err = 0; + + ce = intel_context_create(engine); + if (IS_ERR(ce)) + return PTR_ERR(ce); + + hang = garbage(ce, prng); + if (IS_ERR(hang)) { + err = PTR_ERR(hang); + goto err_ce; + } + + if (wait_for_submit(engine, hang, HZ / 2)) { + i915_request_put(hang); + err = -ETIME; + goto err_ce; + } + + intel_context_set_banned(ce); + garbage_reset(engine, hang); + + intel_engine_flush_submission(engine); + if (!hang->fence.error) { + i915_request_put(hang); + pr_err("%s: corrupted context was not reset\n", + engine->name); + err = -EINVAL; + goto err_ce; + } + + if (i915_request_wait(hang, 0, HZ / 2) < 0) { + pr_err("%s: corrupted context did not recover\n", + engine->name); + i915_request_put(hang); + err = -EIO; + goto err_ce; + } + i915_request_put(hang); + +err_ce: + intel_context_put(ce); + return err; +} + +static int live_lrc_garbage(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_engine_cs *engine; + enum intel_engine_id id; + + /* + * Verify that we can recover if one context state is completely + * corrupted. + */ + + if (!IS_ENABLED(CONFIG_DRM_I915_SELFTEST_BROKEN)) + return 0; + + for_each_engine(engine, gt, id) { + I915_RND_STATE(prng); + int err = 0, i; + + if (!intel_has_reset_engine(engine->gt)) + continue; + + intel_engine_pm_get(engine); + for (i = 0; i < 3; i++) { + err = __lrc_garbage(engine, &prng); + if (err) + break; + } + intel_engine_pm_put(engine); + + if (igt_flush_test(gt->i915)) + err = -EIO; + if (err) + return err; + } + + return 0; +} + static int __live_pphwsp_runtime(struct intel_engine_cs *engine) { struct intel_context *ce; @@ -5379,6 +5513,7 @@ int intel_lrc_live_selftests(struct drm_i915_private *i915) SUBTEST(live_lrc_gpr), SUBTEST(live_lrc_isolation), SUBTEST(live_lrc_timestamp), + SUBTEST(live_lrc_garbage), SUBTEST(live_pphwsp_runtime), };