51 	int (*init_legacy)(struct intel_engine_cs *engine);
52 	int (*init_execlists)(struct intel_engine_cs *engine);
201 	struct intel_engine_cs *engine;  in intel_engine_setup()  local
206 	GEM_BUG_ON(dev_priv->engine[id]);  in intel_engine_setup()
207 	engine = kzalloc(sizeof(*engine), GFP_KERNEL);  in intel_engine_setup()
208 	if (!engine)  in intel_engine_setup()
211 	engine->id = id;  in intel_engine_setup()
212 	engine->i915 = dev_priv;  in intel_engine_setup()
213 	WARN_ON(snprintf(engine->name, sizeof(engine->name), "%s%u",  in intel_engine_setup()
215 		sizeof(engine->name));  in intel_engine_setup()
216 	engine->uabi_id = info->uabi_id;  in intel_engine_setup()
217 	engine->hw_id = engine->guc_id = info->hw_id;  in intel_engine_setup()
218 	engine->mmio_base = info->mmio_base;  in intel_engine_setup()
219 	engine->irq_shift = info->irq_shift;  in intel_engine_setup()
220 	engine->class = info->class;  in intel_engine_setup()
221 	engine->instance = info->instance;  in intel_engine_setup()
223 	engine->context_size = __intel_engine_context_size(dev_priv,  in intel_engine_setup()
224 							   engine->class);  in intel_engine_setup()
225 	if (WARN_ON(engine->context_size > BIT(20)))  in intel_engine_setup()
226 		engine->context_size = 0;  in intel_engine_setup()
229 	engine->schedule = NULL;  in intel_engine_setup()
231 	ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier);  in intel_engine_setup()
233 	dev_priv->engine[id] = engine;  in intel_engine_setup()
247 	struct intel_engine_cs *engine;  in intel_engines_init_mmio()  local
287 	for_each_engine(engine, dev_priv, id)  in intel_engines_init_mmio()
288 		kfree(engine);  in intel_engines_init_mmio()
300 	struct intel_engine_cs *engine;  in intel_engines_init()  local
304 	for_each_engine(engine, dev_priv, id) {  in intel_engines_init()
306 			&intel_engine_classes[engine->class];  in intel_engines_init()
307 		int (*init)(struct intel_engine_cs *engine);  in intel_engines_init()
320 		err = init(engine);  in intel_engines_init()
324 		GEM_BUG_ON(!engine->submit_request);  in intel_engines_init()
330 	for_each_engine(engine, dev_priv, id) {  in intel_engines_init()
332 			kfree(engine);  in intel_engines_init()
333 			dev_priv->engine[id] = NULL;  in intel_engines_init()
335 			dev_priv->gt.cleanup_engine(engine);  in intel_engines_init()
341 void intel_engine_init_global_seqno(struct intel_engine_cs *engine, u32 seqno)  in intel_engine_init_global_seqno()  argument
343 	struct drm_i915_private *dev_priv = engine->i915;  in intel_engine_init_global_seqno()
354 		I915_WRITE(RING_SYNC_0(engine->mmio_base), 0);  in intel_engine_init_global_seqno()
355 		I915_WRITE(RING_SYNC_1(engine->mmio_base), 0);  in intel_engine_init_global_seqno()
357 			I915_WRITE(RING_SYNC_2(engine->mmio_base), 0);  in intel_engine_init_global_seqno()
365 		memset(semaphores + GEN8_SEMAPHORE_OFFSET(engine->id, 0),  in intel_engine_init_global_seqno()
367 		drm_clflush_virt_range(semaphores + GEN8_SEMAPHORE_OFFSET(engine->id, 0),  in intel_engine_init_global_seqno()
372 	intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno);  in intel_engine_init_global_seqno()
373 	clear_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted);  in intel_engine_init_global_seqno()
378 	intel_engine_wakeup(engine);  in intel_engine_init_global_seqno()
380 	GEM_BUG_ON(intel_engine_get_seqno(engine) != seqno);  in intel_engine_init_global_seqno()
383 static void intel_engine_init_timeline(struct intel_engine_cs *engine)  in intel_engine_init_timeline()  argument
385 	engine->timeline = &engine->i915->gt.global_timeline.engine[engine->id];  in intel_engine_init_timeline()
405 static void intel_engine_init_execlist(struct intel_engine_cs *engine)  in intel_engine_init_execlist()  argument
407 	struct intel_engine_execlists * const execlists = &engine->execlists;  in intel_engine_init_execlist()
409 	execlists->csb_use_mmio = csb_force_mmio(engine->i915);  in intel_engine_init_execlist()
428 void intel_engine_setup_common(struct intel_engine_cs *engine)  in intel_engine_setup_common()  argument
430 	intel_engine_init_execlist(engine);  in intel_engine_setup_common()
432 	intel_engine_init_timeline(engine);  in intel_engine_setup_common()
433 	intel_engine_init_hangcheck(engine);  in intel_engine_setup_common()
434 	i915_gem_batch_pool_init(engine, &engine->batch_pool);  in intel_engine_setup_common()
436 	intel_engine_init_cmd_parser(engine);  in intel_engine_setup_common()
439 int intel_engine_create_scratch(struct intel_engine_cs *engine, int size)  in intel_engine_create_scratch()  argument
445 	WARN_ON(engine->scratch);  in intel_engine_create_scratch()
447 	obj = i915_gem_object_create_stolen(engine->i915, size);  in intel_engine_create_scratch()
449 		obj = i915_gem_object_create_internal(engine->i915, size);  in intel_engine_create_scratch()
455 	vma = i915_vma_instance(obj, &engine->i915->ggtt.base, NULL);  in intel_engine_create_scratch()
465 	engine->scratch = vma;  in intel_engine_create_scratch()
467 			 engine->name, i915_ggtt_offset(vma));  in intel_engine_create_scratch()
475 static void intel_engine_cleanup_scratch(struct intel_engine_cs *engine)  in intel_engine_cleanup_scratch()  argument
477 	i915_vma_unpin_and_release(&engine->scratch);  in intel_engine_cleanup_scratch()
480 static void cleanup_phys_status_page(struct intel_engine_cs *engine)  in cleanup_phys_status_page()  argument
482 	struct drm_i915_private *dev_priv = engine->i915;  in cleanup_phys_status_page()
488 	engine->status_page.page_addr = NULL;  in cleanup_phys_status_page()
491 static void cleanup_status_page(struct intel_engine_cs *engine)  in cleanup_status_page()  argument
496 	vma = fetch_and_zero(&engine->status_page.vma);  in cleanup_status_page()
509 static int init_status_page(struct intel_engine_cs *engine)  in init_status_page()  argument
517 	obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE);  in init_status_page()
527 	vma = i915_vma_instance(obj, &engine->i915->ggtt.base, NULL);  in init_status_page()
534 	if (!HAS_LLC(engine->i915))  in init_status_page()
558 	engine->status_page.vma = vma;  in init_status_page()
559 	engine->status_page.ggtt_offset = i915_ggtt_offset(vma);  in init_status_page()
560 	engine->status_page.page_addr = memset(vaddr, 0, PAGE_SIZE);  in init_status_page()
563 			 engine->name, i915_ggtt_offset(vma));  in init_status_page()
573 static int init_phys_status_page(struct intel_engine_cs *engine)  in init_phys_status_page()  argument
575 	struct drm_i915_private *dev_priv = engine->i915;  in init_phys_status_page()
577 	GEM_BUG_ON(engine->id != RCS);  in init_phys_status_page()
584 	engine->status_page.page_addr = dev_priv->status_page_dmah->vaddr;  in init_phys_status_page()
585 	memset(engine->status_page.page_addr, 0, PAGE_SIZE);  in init_phys_status_page()
601 int intel_engine_init_common(struct intel_engine_cs *engine)  in intel_engine_init_common()  argument
606 	engine->set_default_submission(engine);  in intel_engine_init_common()
615 	ring = engine->context_pin(engine, engine->i915->kernel_context);  in intel_engine_init_common()
623 	if (INTEL_INFO(engine->i915)->has_logical_ring_preemption) {  in intel_engine_init_common()
624 		ring = engine->context_pin(engine,  in intel_engine_init_common()
625 					   engine->i915->preempt_context);  in intel_engine_init_common()
632 	ret = intel_engine_init_breadcrumbs(engine);  in intel_engine_init_common()
636 	ret = i915_gem_render_state_init(engine);  in intel_engine_init_common()
640 	if (HWS_NEEDS_PHYSICAL(engine->i915))  in intel_engine_init_common()
641 		ret = init_phys_status_page(engine);  in intel_engine_init_common()
643 		ret = init_status_page(engine);  in intel_engine_init_common()
650 	i915_gem_render_state_fini(engine);  in intel_engine_init_common()
652 	intel_engine_fini_breadcrumbs(engine);  in intel_engine_init_common()
654 	if (INTEL_INFO(engine->i915)->has_logical_ring_preemption)  in intel_engine_init_common()
655 		engine->context_unpin(engine, engine->i915->preempt_context);  in intel_engine_init_common()
657 	engine->context_unpin(engine, engine->i915->kernel_context);  in intel_engine_init_common()
668 void intel_engine_cleanup_common(struct intel_engine_cs *engine)  in intel_engine_cleanup_common()  argument
670 	intel_engine_cleanup_scratch(engine);  in intel_engine_cleanup_common()
672 	if (HWS_NEEDS_PHYSICAL(engine->i915))  in intel_engine_cleanup_common()
673 		cleanup_phys_status_page(engine);  in intel_engine_cleanup_common()
675 		cleanup_status_page(engine);  in intel_engine_cleanup_common()
677 	i915_gem_render_state_fini(engine);  in intel_engine_cleanup_common()
678 	intel_engine_fini_breadcrumbs(engine);  in intel_engine_cleanup_common()
679 	intel_engine_cleanup_cmd_parser(engine);  in intel_engine_cleanup_common()
680 	i915_gem_batch_pool_fini(&engine->batch_pool);  in intel_engine_cleanup_common()
682 	if (INTEL_INFO(engine->i915)->has_logical_ring_preemption)  in intel_engine_cleanup_common()
683 		engine->context_unpin(engine, engine->i915->preempt_context);  in intel_engine_cleanup_common()
684 	engine->context_unpin(engine, engine->i915->kernel_context);  in intel_engine_cleanup_common()
687 u64 intel_engine_get_active_head(struct intel_engine_cs *engine)  in intel_engine_get_active_head()  argument
689 	struct drm_i915_private *dev_priv = engine->i915;  in intel_engine_get_active_head()
693 		acthd = I915_READ64_2x32(RING_ACTHD(engine->mmio_base),  in intel_engine_get_active_head()
694 					 RING_ACTHD_UDW(engine->mmio_base));  in intel_engine_get_active_head()
696 		acthd = I915_READ(RING_ACTHD(engine->mmio_base));  in intel_engine_get_active_head()
703 u64 intel_engine_get_last_batch_head(struct intel_engine_cs *engine)  in intel_engine_get_last_batch_head()  argument
705 	struct drm_i915_private *dev_priv = engine->i915;  in intel_engine_get_last_batch_head()
709 		bbaddr = I915_READ64_2x32(RING_BBADDR(engine->mmio_base),  in intel_engine_get_last_batch_head()
710 					  RING_BBADDR_UDW(engine->mmio_base));  in intel_engine_get_last_batch_head()
712 		bbaddr = I915_READ(RING_BBADDR(engine->mmio_base));  in intel_engine_get_last_batch_head()
767 void intel_engine_get_instdone(struct intel_engine_cs *engine,  in intel_engine_get_instdone()  argument
770 	struct drm_i915_private *dev_priv = engine->i915;  in intel_engine_get_instdone()
771 	u32 mmio_base = engine->mmio_base;  in intel_engine_get_instdone()
781 		if (engine->id != RCS)  in intel_engine_get_instdone()
797 		if (engine->id != RCS)  in intel_engine_get_instdone()
810 		if (engine->id == RCS)  in intel_engine_get_instdone()
854 static int wa_ring_whitelist_reg(struct intel_engine_cs *engine,  in wa_ring_whitelist_reg()  argument
857 	struct drm_i915_private *dev_priv = engine->i915;  in wa_ring_whitelist_reg()
859 	const uint32_t index = wa->hw_whitelist_count[engine->id];  in wa_ring_whitelist_reg()
864 	I915_WRITE(RING_FORCE_TO_NONPRIV(engine->mmio_base, index),  in wa_ring_whitelist_reg()
866 	wa->hw_whitelist_count[engine->id]++;  in wa_ring_whitelist_reg()
871 static int gen8_init_workarounds(struct intel_engine_cs *engine)  in gen8_init_workarounds()  argument
873 	struct drm_i915_private *dev_priv = engine->i915;  in gen8_init_workarounds()
922 static int bdw_init_workarounds(struct intel_engine_cs *engine)  in bdw_init_workarounds()  argument
924 	struct drm_i915_private *dev_priv = engine->i915;  in bdw_init_workarounds()
927 	ret = gen8_init_workarounds(engine);  in bdw_init_workarounds()
954 static int chv_init_workarounds(struct intel_engine_cs *engine)  in chv_init_workarounds()  argument
956 	struct drm_i915_private *dev_priv = engine->i915;  in chv_init_workarounds()
959 	ret = gen8_init_workarounds(engine);  in chv_init_workarounds()
972 static int gen9_init_workarounds(struct intel_engine_cs *engine)  in gen9_init_workarounds()  argument
974 	struct drm_i915_private *dev_priv = engine->i915;  in gen9_init_workarounds()
1113 	ret = wa_ring_whitelist_reg(engine, GEN9_CTX_PREEMPT_REG);  in gen9_init_workarounds()
1120 	ret = wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);  in gen9_init_workarounds()
1125 	ret = wa_ring_whitelist_reg(engine, GEN8_HDC_CHICKEN1);  in gen9_init_workarounds()
1132 static int skl_tune_iz_hashing(struct intel_engine_cs *engine)  in skl_tune_iz_hashing()  argument
1134 	struct drm_i915_private *dev_priv = engine->i915;  in skl_tune_iz_hashing()
1173 static int skl_init_workarounds(struct intel_engine_cs *engine)  in skl_init_workarounds()  argument
1175 	struct drm_i915_private *dev_priv = engine->i915;  in skl_init_workarounds()
1178 	ret = gen9_init_workarounds(engine);  in skl_init_workarounds()
1197 	ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4);  in skl_init_workarounds()
1201 	return skl_tune_iz_hashing(engine);  in skl_init_workarounds()
1204 static int bxt_init_workarounds(struct intel_engine_cs *engine)  in bxt_init_workarounds()  argument
1206 	struct drm_i915_private *dev_priv = engine->i915;  in bxt_init_workarounds()
1209 	ret = gen9_init_workarounds(engine);  in bxt_init_workarounds()
1246 		ret = wa_ring_whitelist_reg(engine, GEN9_CS_DEBUG_MODE1);  in bxt_init_workarounds()
1250 		ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4);  in bxt_init_workarounds()
1277 static int cnl_init_workarounds(struct intel_engine_cs *engine)  in cnl_init_workarounds()  argument
1279 	struct drm_i915_private *dev_priv = engine->i915;  in cnl_init_workarounds()
1326 	ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);  in cnl_init_workarounds()
1333 static int kbl_init_workarounds(struct intel_engine_cs *engine)  in kbl_init_workarounds()  argument
1335 	struct drm_i915_private *dev_priv = engine->i915;  in kbl_init_workarounds()
1338 	ret = gen9_init_workarounds(engine);  in kbl_init_workarounds()
1377 	ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4);  in kbl_init_workarounds()
1384 static int glk_init_workarounds(struct intel_engine_cs *engine)  in glk_init_workarounds()  argument
1386 	struct drm_i915_private *dev_priv = engine->i915;  in glk_init_workarounds()
1389 	ret = gen9_init_workarounds(engine);  in glk_init_workarounds()
1394 	ret = wa_ring_whitelist_reg(engine, GEN9_SLICE_COMMON_ECO_CHICKEN1);  in glk_init_workarounds()
1405 static int cfl_init_workarounds(struct intel_engine_cs *engine)  in cfl_init_workarounds()  argument
1407 	struct drm_i915_private *dev_priv = engine->i915;  in cfl_init_workarounds()
1410 	ret = gen9_init_workarounds(engine);  in cfl_init_workarounds()
1439 int init_workarounds_ring(struct intel_engine_cs *engine)  in init_workarounds_ring()  argument
1441 	struct drm_i915_private *dev_priv = engine->i915;  in init_workarounds_ring()
1444 	WARN_ON(engine->id != RCS);  in init_workarounds_ring()
1447 	dev_priv->workarounds.hw_whitelist_count[engine->id] = 0;  in init_workarounds_ring()
1450 		err = bdw_init_workarounds(engine);  in init_workarounds_ring()
1452 		err = chv_init_workarounds(engine);  in init_workarounds_ring()
1454 		err =  skl_init_workarounds(engine);  in init_workarounds_ring()
1456 		err = bxt_init_workarounds(engine);  in init_workarounds_ring()
1458 		err = kbl_init_workarounds(engine);  in init_workarounds_ring()
1460 		err =  glk_init_workarounds(engine);  in init_workarounds_ring()
1462 		err = cfl_init_workarounds(engine);  in init_workarounds_ring()
1464 		err = cnl_init_workarounds(engine);  in init_workarounds_ring()
1471 			 engine->name, dev_priv->workarounds.count);  in init_workarounds_ring()
1484 	ret = req->engine->emit_flush(req, EMIT_BARRIER);  in intel_ring_workarounds_emit()
1501 	ret = req->engine->emit_flush(req, EMIT_BARRIER);  in intel_ring_workarounds_emit()
1508 static bool ring_is_idle(struct intel_engine_cs *engine)  in ring_is_idle()  argument
1510 	struct drm_i915_private *dev_priv = engine->i915;  in ring_is_idle()
1516 	if ((I915_READ_HEAD(engine) & HEAD_ADDR) !=  in ring_is_idle()
1517 	    (I915_READ_TAIL(engine) & TAIL_ADDR))  in ring_is_idle()
1521 	if (INTEL_GEN(dev_priv) > 2 && !(I915_READ_MODE(engine) & MODE_IDLE))  in ring_is_idle()
1536 bool intel_engine_is_idle(struct intel_engine_cs *engine)  in intel_engine_is_idle()  argument
1538 	struct drm_i915_private *dev_priv = engine->i915;  in intel_engine_is_idle()
1545 	if (!i915_seqno_passed(intel_engine_get_seqno(engine),  in intel_engine_is_idle()
1546 			       intel_engine_last_submit(engine)))  in intel_engine_is_idle()
1549 	if (I915_SELFTEST_ONLY(engine->breadcrumbs.mock))  in intel_engine_is_idle()
1553 	if (test_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted))  in intel_engine_is_idle()
1557 	if (READ_ONCE(engine->execlists.active))  in intel_engine_is_idle()
1561 	if (READ_ONCE(engine->execlists.first))  in intel_engine_is_idle()
1565 	if (!ring_is_idle(engine))  in intel_engine_is_idle()
1573 	struct intel_engine_cs *engine;  in intel_engines_are_idle()  local
1585 	for_each_engine(engine, dev_priv, id) {  in intel_engines_are_idle()
1586 		if (!intel_engine_is_idle(engine))  in intel_engines_are_idle()
1595 	struct intel_engine_cs *engine;  in intel_engines_reset_default_submission()  local
1598 	for_each_engine(engine, i915, id)  in intel_engines_reset_default_submission()
1599 		engine->set_default_submission(engine);  in intel_engines_reset_default_submission()
1604 	struct intel_engine_cs *engine;  in intel_engines_mark_idle()  local
1607 	for_each_engine(engine, i915, id) {  in intel_engines_mark_idle()
1608 		intel_engine_disarm_breadcrumbs(engine);  in intel_engines_mark_idle()
1609 		i915_gem_batch_pool_fini(&engine->batch_pool);  in intel_engines_mark_idle()
1610 		tasklet_kill(&engine->execlists.irq_tasklet);  in intel_engines_mark_idle()
1611 		engine->execlists.no_priolist = false;  in intel_engines_mark_idle()
1615 bool intel_engine_can_store_dword(struct intel_engine_cs *engine)  in intel_engine_can_store_dword()  argument
1617 	switch (INTEL_GEN(engine->i915)) {  in intel_engine_can_store_dword()
1622 		return !(IS_I915G(engine->i915) || IS_I915GM(engine->i915));  in intel_engine_can_store_dword()
1624 		return engine->class != VIDEO_DECODE_CLASS; /* b0rked */  in intel_engine_can_store_dword()
1643 void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m)  in intel_engine_dump()  argument
1645 	struct intel_breadcrumbs * const b = &engine->breadcrumbs;  in intel_engine_dump()
1646 	const struct intel_engine_execlists * const execlists = &engine->execlists;  in intel_engine_dump()
1647 	struct i915_gpu_error * const error = &engine->i915->gpu_error;  in intel_engine_dump()
1648 	struct drm_i915_private *dev_priv = engine->i915;  in intel_engine_dump()
1653 	drm_printf(m, "%s\n", engine->name);  in intel_engine_dump()
1655 		   intel_engine_get_seqno(engine),  in intel_engine_dump()
1656 		   intel_engine_last_submit(engine),  in intel_engine_dump()
1657 		   engine->hangcheck.seqno,  in intel_engine_dump()
1658 		   jiffies_to_msecs(jiffies - engine->hangcheck.action_timestamp),  in intel_engine_dump()
1659 		   engine->timeline->inflight_seqnos);  in intel_engine_dump()
1661 		   i915_reset_engine_count(error, engine));  in intel_engine_dump()
1667 	rq = list_first_entry(&engine->timeline->requests,  in intel_engine_dump()
1669 	if (&rq->link != &engine->timeline->requests)  in intel_engine_dump()
1672 	rq = list_last_entry(&engine->timeline->requests,  in intel_engine_dump()
1674 	if (&rq->link != &engine->timeline->requests)  in intel_engine_dump()
1677 	rq = i915_gem_find_active_request(engine);  in intel_engine_dump()
1688 		   I915_READ(RING_START(engine->mmio_base)),  in intel_engine_dump()
1691 		   I915_READ(RING_HEAD(engine->mmio_base)) & HEAD_ADDR,  in intel_engine_dump()
1694 		   I915_READ(RING_TAIL(engine->mmio_base)) & TAIL_ADDR,  in intel_engine_dump()
1697 		   I915_READ(RING_CTL(engine->mmio_base)),  in intel_engine_dump()
1698 		   I915_READ(RING_CTL(engine->mmio_base)) & (RING_WAIT | RING_WAIT_SEMAPHORE) ? "waiting" : "");  in intel_engine_dump()
1702 	addr = intel_engine_get_active_head(engine);  in intel_engine_dump()
1705 	addr = intel_engine_get_last_batch_head(engine);  in intel_engine_dump()
1710 		const u32 *hws = &engine->status_page.page_addr[I915_HWS_CSB_BUF0_INDEX];  in intel_engine_dump()
1715 			   I915_READ(RING_EXECLIST_STATUS_LO(engine)),  in intel_engine_dump()
1716 			   I915_READ(RING_EXECLIST_STATUS_HI(engine)));  in intel_engine_dump()
1718 		ptr = I915_READ(RING_CONTEXT_STATUS_PTR(engine));  in intel_engine_dump()
1724 			   intel_read_status_page(engine, intel_hws_csb_write_index(engine->i915)),  in intel_engine_dump()
1726 					  &engine->irq_posted)));  in intel_engine_dump()
1737 				   I915_READ(RING_CONTEXT_STATUS_BUF_LO(engine, idx)),  in intel_engine_dump()
1739 				   I915_READ(RING_CONTEXT_STATUS_BUF_HI(engine, idx)),  in intel_engine_dump()
1761 			   I915_READ(RING_PP_DIR_BASE(engine)));  in intel_engine_dump()
1763 			   I915_READ(RING_PP_DIR_BASE_READ(engine)));  in intel_engine_dump()
1765 			   I915_READ(RING_PP_DIR_DCLV(engine)));  in intel_engine_dump()
1768 	spin_lock_irq(&engine->timeline->lock);  in intel_engine_dump()
1769 	list_for_each_entry(rq, &engine->timeline->requests, link)  in intel_engine_dump()
1778 	spin_unlock_irq(&engine->timeline->lock);  in intel_engine_dump()