diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index b8b7b91019f4..4f3758a1cbcf 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -2758,6 +2758,168 @@ err_ce: return err; } +static int __live_preempt_ring(struct intel_engine_cs *engine, + struct igt_spinner *spin, + int queue_sz, int ring_sz) +{ + struct intel_context *ce[2] = {}; + struct i915_request *rq; + struct igt_live_test t; + int err = 0; + int n; + + if (igt_live_test_begin(&t, engine->i915, __func__, engine->name)) + return -EIO; + + for (n = 0; n < ARRAY_SIZE(ce); n++) { + struct intel_context *tmp; + + tmp = intel_context_create(engine); + if (IS_ERR(tmp)) { + err = PTR_ERR(tmp); + goto err_ce; + } + + tmp->ring = __intel_context_ring_size(ring_sz); + + err = intel_context_pin(tmp); + if (err) { + intel_context_put(tmp); + goto err_ce; + } + + memset32(tmp->ring->vaddr, + 0xdeadbeef, /* trigger a hang if executed */ + tmp->ring->vma->size / sizeof(u32)); + + ce[n] = tmp; + } + + rq = igt_spinner_create_request(spin, ce[0], MI_ARB_CHECK); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_ce; + } + + i915_request_get(rq); + rq->sched.attr.priority = I915_PRIORITY_BARRIER; + i915_request_add(rq); + + if (!igt_wait_for_spinner(spin, rq)) { + intel_gt_set_wedged(engine->gt); + i915_request_put(rq); + err = -ETIME; + goto err_ce; + } + + /* Fill the ring, until we will cause a wrap */ + n = 0; + while (ce[0]->ring->tail - rq->wa_tail <= queue_sz) { + struct i915_request *tmp; + + tmp = intel_context_create_request(ce[0]); + if (IS_ERR(tmp)) { + err = PTR_ERR(tmp); + i915_request_put(rq); + goto err_ce; + } + + i915_request_add(tmp); + intel_engine_flush_submission(engine); + n++; + } + intel_engine_flush_submission(engine); + pr_debug("%s: Filled %d with %d nop tails {size:%x, tail:%x, emit:%x, rq.tail:%x}\n", + engine->name, queue_sz, n, + ce[0]->ring->size, + ce[0]->ring->tail, + ce[0]->ring->emit, + rq->tail); + i915_request_put(rq); + + /* Create a second request to preempt the first ring */ + rq = intel_context_create_request(ce[1]); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_ce; + } + + rq->sched.attr.priority = I915_PRIORITY_BARRIER; + i915_request_get(rq); + i915_request_add(rq); + + err = wait_for_submit(engine, rq, HZ / 2); + i915_request_put(rq); + if (err) { + pr_err("%s: preemption request was not submited\n", + engine->name); + err = -ETIME; + } + + pr_debug("%s: ring[0]:{ tail:%x, emit:%x }, ring[1]:{ tail:%x, emit:%x }\n", + engine->name, + ce[0]->ring->tail, ce[0]->ring->emit, + ce[1]->ring->tail, ce[1]->ring->emit); + +err_ce: + intel_engine_flush_submission(engine); + igt_spinner_end(spin); + for (n = 0; n < ARRAY_SIZE(ce); n++) { + if (IS_ERR_OR_NULL(ce[n])) + break; + + intel_context_unpin(ce[n]); + intel_context_put(ce[n]); + } + if (igt_live_test_end(&t)) + err = -EIO; + return err; +} + +static int live_preempt_ring(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_engine_cs *engine; + struct igt_spinner spin; + enum intel_engine_id id; + int err = 0; + + /* + * Check that we rollback large chunks of a ring in order to do a + * preemption event. Similar to live_unlite_ring, but looking at + * ring size rather than the impact of intel_ring_direction(). + */ + + if (igt_spinner_init(&spin, gt)) + return -ENOMEM; + + for_each_engine(engine, gt, id) { + int n; + + if (!intel_engine_has_preemption(engine)) + continue; + + if (!intel_engine_can_store_dword(engine)) + continue; + + engine_heartbeat_disable(engine); + + for (n = 0; n <= 3; n++) { + err = __live_preempt_ring(engine, &spin, + n * SZ_4K / 4, SZ_4K); + if (err) + break; + } + + engine_heartbeat_enable(engine); + if (err) + break; + } + + igt_spinner_fini(&spin); + return err; +} + static int live_preempt_gang(void *arg) { struct intel_gt *gt = arg; @@ -4540,6 +4702,7 @@ int intel_execlists_live_selftests(struct drm_i915_private *i915) SUBTEST(live_preempt_cancel), SUBTEST(live_suppress_self_preempt), SUBTEST(live_chain_preempt), + SUBTEST(live_preempt_ring), SUBTEST(live_preempt_gang), SUBTEST(live_preempt_timeout), SUBTEST(live_preempt_user),