[RFC PATCH 32/97] drm/i915: Introduce i915_sched_engine object
Daniel Vetter
daniel at ffwll.ch
Tue May 11 15:18:22 UTC 2021
On Thu, May 06, 2021 at 12:13:46PM -0700, Matthew Brost wrote:
> Introduce i915_sched_engine object which is lower level data structure
> that i915_scheduler / generic code can operate on without touching
> execlist specific structures. This allows additional submission backends
> to be added without breaking the layer.
Maybe add a comment here that this is defacto a detour since we're now
aiming to use drm/scheduler instead. But also since the current code is a
bit a mess, we expect this detour to be overall faster since we can then
refactor in-tree.
Maybe also highlight this a bit more in the rfc to make sure this is
clear.
-Daniel
>
> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
> ---
> drivers/gpu/drm/i915/gem/i915_gem_wait.c | 4 +-
> drivers/gpu/drm/i915/gt/intel_engine.h | 16 -
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 77 ++--
> .../gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 +-
> drivers/gpu/drm/i915/gt/intel_engine_pm.c | 10 +-
> drivers/gpu/drm/i915/gt/intel_engine_types.h | 42 +--
> drivers/gpu/drm/i915/gt/intel_engine_user.c | 2 +-
> .../drm/i915/gt/intel_execlists_submission.c | 350 +++++++++++-------
> .../gpu/drm/i915/gt/intel_ring_submission.c | 13 +-
> drivers/gpu/drm/i915/gt/mock_engine.c | 17 +-
> drivers/gpu/drm/i915/gt/selftest_execlists.c | 36 +-
> drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 6 +-
> drivers/gpu/drm/i915/gt/selftest_lrc.c | 6 +-
> drivers/gpu/drm/i915/gt/selftest_reset.c | 2 +-
> .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 75 ++--
> drivers/gpu/drm/i915/i915_gpu_error.c | 7 +-
> drivers/gpu/drm/i915/i915_request.c | 50 +--
> drivers/gpu/drm/i915/i915_request.h | 2 +-
> drivers/gpu/drm/i915/i915_scheduler.c | 168 ++++-----
> drivers/gpu/drm/i915/i915_scheduler.h | 65 +++-
> drivers/gpu/drm/i915/i915_scheduler_types.h | 63 ++++
> 21 files changed, 575 insertions(+), 440 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_wait.c b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> index 4b9856d5ba14..af1fbf8e2a9a 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> @@ -104,8 +104,8 @@ static void fence_set_priority(struct dma_fence *fence,
> engine = rq->engine;
>
> rcu_read_lock(); /* RCU serialisation for set-wedged protection */
> - if (engine->schedule)
> - engine->schedule(rq, attr);
> + if (engine->sched_engine->schedule)
> + engine->sched_engine->schedule(rq, attr);
> rcu_read_unlock();
> }
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
> index 8d9184920c51..988d9688ae4d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine.h
> +++ b/drivers/gpu/drm/i915/gt/intel_engine.h
> @@ -123,20 +123,6 @@ execlists_active(const struct intel_engine_execlists *execlists)
> return active;
> }
>
> -static inline void
> -execlists_active_lock_bh(struct intel_engine_execlists *execlists)
> -{
> - local_bh_disable(); /* prevent local softirq and lock recursion */
> - tasklet_lock(&execlists->tasklet);
> -}
> -
> -static inline void
> -execlists_active_unlock_bh(struct intel_engine_execlists *execlists)
> -{
> - tasklet_unlock(&execlists->tasklet);
> - local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
> -}
> -
> struct i915_request *
> execlists_unwind_incomplete_requests(struct intel_engine_execlists *execlists);
>
> @@ -257,8 +243,6 @@ intel_engine_find_active_request(struct intel_engine_cs *engine);
>
> u32 intel_engine_context_size(struct intel_gt *gt, u8 class);
>
> -void intel_engine_init_active(struct intel_engine_cs *engine,
> - unsigned int subclass);
> #define ENGINE_PHYSICAL 0
> #define ENGINE_MOCK 1
> #define ENGINE_VIRTUAL 2
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> index 828e1669f92c..ec82a7ec0c8d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> @@ -8,6 +8,7 @@
> #include "gem/i915_gem_context.h"
>
> #include "i915_drv.h"
> +#include "i915_scheduler.h"
>
> #include "intel_breadcrumbs.h"
> #include "intel_context.h"
> @@ -326,9 +327,6 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id)
> if (engine->context_size)
> DRIVER_CAPS(i915)->has_logical_contexts = true;
>
> - /* Nothing to do here, execute in order of dependencies */
> - engine->schedule = NULL;
> -
> ewma__engine_latency_init(&engine->latency);
> seqcount_init(&engine->stats.lock);
>
> @@ -583,9 +581,6 @@ void intel_engine_init_execlists(struct intel_engine_cs *engine)
> memset(execlists->pending, 0, sizeof(execlists->pending));
> execlists->active =
> memset(execlists->inflight, 0, sizeof(execlists->inflight));
> -
> - execlists->queue_priority_hint = INT_MIN;
> - execlists->queue = RB_ROOT_CACHED;
> }
>
> static void cleanup_status_page(struct intel_engine_cs *engine)
> @@ -712,11 +707,17 @@ static int engine_setup_common(struct intel_engine_cs *engine)
> goto err_status;
> }
>
> + engine->sched_engine = i915_sched_engine_create(ENGINE_PHYSICAL);
> + if (!engine->sched_engine) {
> + err = -ENOMEM;
> + goto err_sched_engine;
> + }
> + engine->sched_engine->engine = engine;
> +
> err = intel_engine_init_cmd_parser(engine);
> if (err)
> goto err_cmd_parser;
>
> - intel_engine_init_active(engine, ENGINE_PHYSICAL);
> intel_engine_init_execlists(engine);
> intel_engine_init__pm(engine);
> intel_engine_init_retire(engine);
> @@ -735,6 +736,8 @@ static int engine_setup_common(struct intel_engine_cs *engine)
> return 0;
>
> err_cmd_parser:
> + i915_sched_engine_put(engine->sched_engine);
> +err_sched_engine:
> intel_breadcrumbs_free(engine->breadcrumbs);
> err_status:
> cleanup_status_page(engine);
> @@ -773,11 +776,11 @@ static int measure_breadcrumb_dw(struct intel_context *ce)
> frame->rq.ring = &frame->ring;
>
> mutex_lock(&ce->timeline->mutex);
> - spin_lock_irq(&engine->active.lock);
> + spin_lock_irq(&engine->sched_engine->lock);
>
> dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs;
>
> - spin_unlock_irq(&engine->active.lock);
> + spin_unlock_irq(&engine->sched_engine->lock);
> mutex_unlock(&ce->timeline->mutex);
>
> GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */
> @@ -786,28 +789,6 @@ static int measure_breadcrumb_dw(struct intel_context *ce)
> return dw;
> }
>
> -void
> -intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass)
> -{
> - INIT_LIST_HEAD(&engine->active.requests);
> - INIT_LIST_HEAD(&engine->active.hold);
> -
> - spin_lock_init(&engine->active.lock);
> - lockdep_set_subclass(&engine->active.lock, subclass);
> -
> - /*
> - * Due to an interesting quirk in lockdep's internal debug tracking,
> - * after setting a subclass we must ensure the lock is used. Otherwise,
> - * nr_unused_locks is incremented once too often.
> - */
> -#ifdef CONFIG_DEBUG_LOCK_ALLOC
> - local_irq_disable();
> - lock_map_acquire(&engine->active.lock.dep_map);
> - lock_map_release(&engine->active.lock.dep_map);
> - local_irq_enable();
> -#endif
> -}
> -
> static struct intel_context *
> create_pinned_context(struct intel_engine_cs *engine,
> unsigned int hwsp,
> @@ -955,10 +936,10 @@ int intel_engines_init(struct intel_gt *gt)
> */
> void intel_engine_cleanup_common(struct intel_engine_cs *engine)
> {
> - GEM_BUG_ON(!list_empty(&engine->active.requests));
> - tasklet_kill(&engine->execlists.tasklet); /* flush the callback */
> + GEM_BUG_ON(!list_empty(&engine->sched_engine->requests));
>
> intel_breadcrumbs_free(engine->breadcrumbs);
> + i915_sched_engine_put(engine->sched_engine);
>
> intel_engine_fini_retire(engine);
> intel_engine_cleanup_cmd_parser(engine);
> @@ -1241,7 +1222,7 @@ static bool ring_is_idle(struct intel_engine_cs *engine)
>
> void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync)
> {
> - struct tasklet_struct *t = &engine->execlists.tasklet;
> + struct tasklet_struct *t = &engine->sched_engine->tasklet;
>
> if (!t->callback)
> return;
> @@ -1281,7 +1262,7 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine)
> intel_engine_flush_submission(engine);
>
> /* ELSP is empty, but there are ready requests? E.g. after reset */
> - if (!RB_EMPTY_ROOT(&engine->execlists.queue.rb_root))
> + if (!i915_sched_engine_is_empty(engine->sched_engine))
> return false;
>
> /* Ring stopped? */
> @@ -1347,7 +1328,7 @@ static struct intel_timeline *get_timeline(struct i915_request *rq)
> struct intel_timeline *tl;
>
> /*
> - * Even though we are holding the engine->active.lock here, there
> + * Even though we are holding the engine->sched_engine->lock here, there
> * is no control over the submission queue per-se and we are
> * inspecting the active state at a random point in time, with an
> * unknown queue. Play safe and make sure the timeline remains valid.
> @@ -1502,10 +1483,10 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
>
> drm_printf(m, "\tExeclist tasklet queued? %s (%s), preempt? %s, timeslice? %s\n",
> yesno(test_bit(TASKLET_STATE_SCHED,
> - &engine->execlists.tasklet.state)),
> - enableddisabled(!atomic_read(&engine->execlists.tasklet.count)),
> - repr_timer(&engine->execlists.preempt),
> - repr_timer(&engine->execlists.timer));
> + &engine->sched_engine->tasklet.state)),
> + enableddisabled(!atomic_read(&engine->sched_engine->tasklet.count)),
> + repr_timer(&execlists->preempt),
> + repr_timer(&execlists->timer));
>
> read = execlists->csb_head;
> write = READ_ONCE(*execlists->csb_write);
> @@ -1527,7 +1508,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
> idx, hws[idx * 2], hws[idx * 2 + 1]);
> }
>
> - execlists_active_lock_bh(execlists);
> + sched_engine_active_lock_bh(engine->sched_engine);
> rcu_read_lock();
> for (port = execlists->active; (rq = *port); port++) {
> char hdr[160];
> @@ -1558,7 +1539,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
> i915_request_show(m, rq, hdr, 0);
> }
> rcu_read_unlock();
> - execlists_active_unlock_bh(execlists);
> + sched_engine_active_unlock_bh(engine->sched_engine);
> } else if (INTEL_GEN(dev_priv) > 6) {
> drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n",
> ENGINE_READ(engine, RING_PP_DIR_BASE));
> @@ -1694,7 +1675,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
>
> drm_printf(m, "\tRequests:\n");
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
> rq = intel_engine_find_active_request(engine);
> if (rq) {
> struct intel_timeline *tl = get_timeline(rq);
> @@ -1725,8 +1706,9 @@ void intel_engine_dump(struct intel_engine_cs *engine,
> hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE);
> }
> }
> - drm_printf(m, "\tOn hold?: %lu\n", list_count(&engine->active.hold));
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + drm_printf(m, "\tOn hold?: %lu\n",
> + list_count(&engine->sched_engine->hold));
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
>
> drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base);
> wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm);
> @@ -1806,7 +1788,7 @@ intel_engine_find_active_request(struct intel_engine_cs *engine)
> * At all other times, we must assume the GPU is still running, but
> * we only care about the snapshot of this moment.
> */
> - lockdep_assert_held(&engine->active.lock);
> + lockdep_assert_held(&engine->sched_engine->lock);
>
> rcu_read_lock();
> request = execlists_active(&engine->execlists);
> @@ -1824,7 +1806,8 @@ intel_engine_find_active_request(struct intel_engine_cs *engine)
> if (active)
> return active;
>
> - list_for_each_entry(request, &engine->active.requests, sched.link) {
> + list_for_each_entry(request, &engine->sched_engine->requests,
> + sched.link) {
> if (__i915_request_is_complete(request))
> continue;
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
> index b99ac41695f3..b6a305e6a974 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
> @@ -121,7 +121,7 @@ static void heartbeat(struct work_struct *wrk)
> * but all other contexts, including the kernel
> * context are stuck waiting for the signal.
> */
> - } else if (engine->schedule &&
> + } else if (engine->sched_engine->schedule &&
> rq->sched.attr.priority < I915_PRIORITY_BARRIER) {
> /*
> * Gradually raise the priority of the heartbeat to
> @@ -136,7 +136,7 @@ static void heartbeat(struct work_struct *wrk)
> attr.priority = I915_PRIORITY_BARRIER;
>
> local_bh_disable();
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
> local_bh_enable();
> } else {
> if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> index 47f4397095e5..ba6a9931c4e8 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> @@ -274,14 +274,16 @@ static int __engine_park(struct intel_wakeref *wf)
> intel_engine_park_heartbeat(engine);
> intel_breadcrumbs_park(engine->breadcrumbs);
>
> - /* Must be reset upon idling, or we may miss the busy wakeup. */
> - GEM_BUG_ON(engine->execlists.queue_priority_hint != INT_MIN);
> + /*
> + * XXX: Must be reset upon idling, or we may miss the busy wakeup.
> + * queue_priority_hint only used in execlists submission but works in
> + * other modes as default is INT_MIN.
> + */
> + GEM_BUG_ON(engine->sched_engine->queue_priority_hint != INT_MIN);
>
> if (engine->park)
> engine->park(engine);
>
> - engine->execlists.no_priolist = false;
> -
> /* While gt calls i915_vma_parked(), we have to break the lock cycle */
> intel_gt_pm_put_async(engine->gt);
> return 0;
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
> index 9ef349cd5cea..93aa22680db0 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
> @@ -59,6 +59,7 @@ struct drm_i915_reg_table;
> struct i915_gem_context;
> struct i915_request;
> struct i915_sched_attr;
> +struct i915_sched_engine;
> struct intel_gt;
> struct intel_ring;
> struct intel_uncore;
> @@ -137,11 +138,6 @@ struct st_preempt_hang {
> * driver and the hardware state for execlist mode of submission.
> */
> struct intel_engine_execlists {
> - /**
> - * @tasklet: softirq tasklet for bottom handler
> - */
> - struct tasklet_struct tasklet;
> -
> /**
> * @timer: kick the current context if its timeslice expires
> */
> @@ -152,11 +148,6 @@ struct intel_engine_execlists {
> */
> struct timer_list preempt;
>
> - /**
> - * @default_priolist: priority list for I915_PRIORITY_NORMAL
> - */
> - struct i915_priolist default_priolist;
> -
> /**
> * @ccid: identifier for contexts submitted to this engine
> */
> @@ -191,11 +182,6 @@ struct intel_engine_execlists {
> */
> u32 reset_ccid;
>
> - /**
> - * @no_priolist: priority lists disabled
> - */
> - bool no_priolist;
> -
> /**
> * @submit_reg: gen-specific execlist submission register
> * set to the ExecList Submission Port (elsp) register pre-Gen11 and to
> @@ -238,23 +224,8 @@ struct intel_engine_execlists {
> unsigned int port_mask;
>
> /**
> - * @queue_priority_hint: Highest pending priority.
> - *
> - * When we add requests into the queue, or adjust the priority of
> - * executing requests, we compute the maximum priority of those
> - * pending requests. We can then use this value to determine if
> - * we need to preempt the executing requests to service the queue.
> - * However, since the we may have recorded the priority of an inflight
> - * request we wanted to preempt but since completed, at the time of
> - * dequeuing the priority hint may no longer may match the highest
> - * available request priority.
> + * @virtual: virtual of requests, in priority lists
> */
> - int queue_priority_hint;
> -
> - /**
> - * @queue: queue of requests, in priority lists
> - */
> - struct rb_root_cached queue;
> struct rb_root_cached virtual;
>
> /**
> @@ -326,11 +297,7 @@ struct intel_engine_cs {
>
> struct intel_sseu sseu;
>
> - struct {
> - spinlock_t lock;
> - struct list_head requests;
> - struct list_head hold; /* ready requests, but on hold */
> - } active;
> + struct i915_sched_engine *sched_engine;
>
> /* keep a request in reserve for a [pm] barrier under oom */
> struct i915_request *request_pool;
> @@ -459,9 +426,6 @@ struct intel_engine_cs {
> * dependencies may need rescheduling. Note the request itself may
> * not be ready to run!
> */
> - void (*schedule)(struct i915_request *request,
> - const struct i915_sched_attr *attr);
> -
> void (*release)(struct intel_engine_cs *engine);
>
> struct intel_engine_execlists execlists;
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_user.c b/drivers/gpu/drm/i915/gt/intel_engine_user.c
> index 1cbd84eb24e4..d6dcdeace174 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_user.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_user.c
> @@ -107,7 +107,7 @@ static void set_scheduler_caps(struct drm_i915_private *i915)
> for_each_uabi_engine(engine, i915) { /* all engines must agree! */
> int i;
>
> - if (engine->schedule)
> + if (engine->sched_engine->schedule)
> enabled |= (I915_SCHEDULER_CAP_ENABLED |
> I915_SCHEDULER_CAP_PRIORITY);
> else
> diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> index 8db200422950..0927a2416b52 100644
> --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> @@ -273,11 +273,11 @@ static int effective_prio(const struct i915_request *rq)
> return prio;
> }
>
> -static int queue_prio(const struct intel_engine_execlists *execlists)
> +static int queue_prio(const struct i915_sched_engine *sched_engine)
> {
> struct rb_node *rb;
>
> - rb = rb_first_cached(&execlists->queue);
> + rb = rb_first_cached(&sched_engine->queue);
> if (!rb)
> return INT_MIN;
>
> @@ -318,14 +318,14 @@ static bool need_preempt(const struct intel_engine_cs *engine,
> * to preserve FIFO ordering of dependencies.
> */
> last_prio = max(effective_prio(rq), I915_PRIORITY_NORMAL - 1);
> - if (engine->execlists.queue_priority_hint <= last_prio)
> + if (engine->sched_engine->queue_priority_hint <= last_prio)
> return false;
>
> /*
> * Check against the first request in ELSP[1], it will, thanks to the
> * power of PI, be the highest priority of that context.
> */
> - if (!list_is_last(&rq->sched.link, &engine->active.requests) &&
> + if (!list_is_last(&rq->sched.link, &engine->sched_engine->requests) &&
> rq_prio(list_next_entry(rq, sched.link)) > last_prio)
> return true;
>
> @@ -340,7 +340,7 @@ static bool need_preempt(const struct intel_engine_cs *engine,
> * context, it's priority would not exceed ELSP[0] aka last_prio.
> */
> return max(virtual_prio(&engine->execlists),
> - queue_prio(&engine->execlists)) > last_prio;
> + queue_prio(engine->sched_engine)) > last_prio;
> }
>
> __maybe_unused static bool
> @@ -367,10 +367,10 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine)
> struct list_head *pl;
> int prio = I915_PRIORITY_INVALID;
>
> - lockdep_assert_held(&engine->active.lock);
> + lockdep_assert_held(&engine->sched_engine->lock);
>
> list_for_each_entry_safe_reverse(rq, rn,
> - &engine->active.requests,
> + &engine->sched_engine->requests,
> sched.link) {
> if (__i915_request_is_complete(rq)) {
> list_del_init(&rq->sched.link);
> @@ -382,9 +382,10 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine)
> GEM_BUG_ON(rq_prio(rq) == I915_PRIORITY_INVALID);
> if (rq_prio(rq) != prio) {
> prio = rq_prio(rq);
> - pl = i915_sched_lookup_priolist(engine, prio);
> + pl = i915_sched_lookup_priolist(engine->sched_engine,
> + prio);
> }
> - GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
> + GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));
>
> list_move(&rq->sched.link, pl);
> set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
> @@ -534,13 +535,13 @@ resubmit_virtual_request(struct i915_request *rq, struct virtual_engine *ve)
> {
> struct intel_engine_cs *engine = rq->engine;
>
> - spin_lock_irq(&engine->active.lock);
> + spin_lock_irq(&engine->sched_engine->lock);
>
> clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
> WRITE_ONCE(rq->engine, &ve->base);
> ve->base.submit_request(rq);
>
> - spin_unlock_irq(&engine->active.lock);
> + spin_unlock_irq(&engine->sched_engine->lock);
> }
>
> static void kick_siblings(struct i915_request *rq, struct intel_context *ce)
> @@ -569,7 +570,7 @@ static void kick_siblings(struct i915_request *rq, struct intel_context *ce)
> resubmit_virtual_request(rq, ve);
>
> if (READ_ONCE(ve->request))
> - tasklet_hi_schedule(&ve->base.execlists.tasklet);
> + i915_sched_engine_hi_kick(ve->base.sched_engine);
> }
>
> static void __execlists_schedule_out(struct i915_request * const rq,
> @@ -579,7 +580,7 @@ static void __execlists_schedule_out(struct i915_request * const rq,
> unsigned int ccid;
>
> /*
> - * NB process_csb() is not under the engine->active.lock and hence
> + * NB process_csb() is not under the engine->sched_engine->lock and hence
> * schedule_out can race with schedule_in meaning that we should
> * refrain from doing non-trivial work here.
> */
> @@ -721,12 +722,11 @@ dump_port(char *buf, int buflen, const char *prefix, struct i915_request *rq)
> }
>
> static __maybe_unused noinline void
> -trace_ports(const struct intel_engine_execlists *execlists,
> +trace_ports(const struct intel_engine_cs *engine,
> + const struct intel_engine_execlists *execlists,
> const char *msg,
> struct i915_request * const *ports)
> {
> - const struct intel_engine_cs *engine =
> - container_of(execlists, typeof(*engine), execlists);
> char __maybe_unused p0[40], p1[40];
>
> if (!ports[0])
> @@ -738,25 +738,24 @@ trace_ports(const struct intel_engine_execlists *execlists,
> }
>
> static bool
> -reset_in_progress(const struct intel_engine_execlists *execlists)
> +reset_in_progress(const struct intel_engine_cs *engine)
> {
> - return unlikely(!__tasklet_is_enabled(&execlists->tasklet));
> + return unlikely(!__tasklet_is_enabled(&engine->sched_engine->tasklet));
> }
>
> static __maybe_unused noinline bool
> -assert_pending_valid(const struct intel_engine_execlists *execlists,
> +assert_pending_valid(struct intel_engine_cs *engine,
> + const struct intel_engine_execlists *execlists,
> const char *msg)
> {
> - struct intel_engine_cs *engine =
> - container_of(execlists, typeof(*engine), execlists);
> struct i915_request * const *port, *rq, *prev = NULL;
> struct intel_context *ce = NULL;
> u32 ccid = -1;
>
> - trace_ports(execlists, msg, execlists->pending);
> + trace_ports(engine, execlists, msg, execlists->pending);
>
> /* We may be messing around with the lists during reset, lalala */
> - if (reset_in_progress(execlists))
> + if (reset_in_progress(engine))
> return true;
>
> if (!execlists->pending[0]) {
> @@ -878,7 +877,7 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
> struct intel_engine_execlists *execlists = &engine->execlists;
> unsigned int n;
>
> - GEM_BUG_ON(!assert_pending_valid(execlists, "submit"));
> + GEM_BUG_ON(!assert_pending_valid(engine, execlists, "submit"));
>
> /*
> * We can skip acquiring intel_runtime_pm_get() here as it was taken
> @@ -1096,7 +1095,8 @@ static void defer_active(struct intel_engine_cs *engine)
> if (!rq)
> return;
>
> - defer_request(rq, i915_sched_lookup_priolist(engine, rq_prio(rq)));
> + defer_request(rq, i915_sched_lookup_priolist(engine->sched_engine,
> + rq_prio(rq)));
> }
>
> static bool
> @@ -1133,13 +1133,14 @@ static bool needs_timeslice(const struct intel_engine_cs *engine,
> return false;
>
> /* If ELSP[1] is occupied, always check to see if worth slicing */
> - if (!list_is_last_rcu(&rq->sched.link, &engine->active.requests)) {
> + if (!list_is_last_rcu(&rq->sched.link,
> + &engine->sched_engine->requests)) {
> ENGINE_TRACE(engine, "timeslice required for second inflight context\n");
> return true;
> }
>
> /* Otherwise, ELSP[0] is by itself, but may be waiting in the queue */
> - if (!RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)) {
> + if (!i915_sched_engine_is_empty(engine->sched_engine)) {
> ENGINE_TRACE(engine, "timeslice required for queue\n");
> return true;
> }
> @@ -1187,7 +1188,7 @@ static void start_timeslice(struct intel_engine_cs *engine)
> * its timeslice, so recheck.
> */
> if (!timer_pending(&el->timer))
> - tasklet_hi_schedule(&el->tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> return;
> }
>
> @@ -1235,6 +1236,7 @@ static bool completed(const struct i915_request *rq)
>
> static void execlists_dequeue(struct intel_engine_cs *engine)
> {
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
> struct intel_engine_execlists * const execlists = &engine->execlists;
> struct i915_request **port = execlists->pending;
> struct i915_request ** const last_port = port + execlists->port_mask;
> @@ -1265,7 +1267,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> * and context switches) submission.
> */
>
> - spin_lock(&engine->active.lock);
> + spin_lock(&engine->sched_engine->lock);
>
> /*
> * If the queue is higher priority than the last
> @@ -1287,7 +1289,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> last->fence.context,
> last->fence.seqno,
> last->sched.attr.priority,
> - execlists->queue_priority_hint);
> + sched_engine->queue_priority_hint);
> record_preemption(execlists);
>
> /*
> @@ -1313,7 +1315,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> yesno(timer_expired(&execlists->timer)),
> last->fence.context, last->fence.seqno,
> rq_prio(last),
> - execlists->queue_priority_hint,
> + sched_engine->queue_priority_hint,
> yesno(timeslice_yield(execlists, last)));
>
> /*
> @@ -1365,7 +1367,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> * Even if ELSP[1] is occupied and not worthy
> * of timeslices, our queue might be.
> */
> - spin_unlock(&engine->active.lock);
> + spin_unlock(&sched_engine->lock);
> return;
> }
> }
> @@ -1375,7 +1377,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> while ((ve = first_virtual_engine(engine))) {
> struct i915_request *rq;
>
> - spin_lock(&ve->base.active.lock);
> + spin_lock(&ve->base.sched_engine->lock);
>
> rq = ve->request;
> if (unlikely(!virtual_matches(ve, rq, engine)))
> @@ -1384,14 +1386,14 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> GEM_BUG_ON(rq->engine != &ve->base);
> GEM_BUG_ON(rq->context != &ve->context);
>
> - if (unlikely(rq_prio(rq) < queue_prio(execlists))) {
> - spin_unlock(&ve->base.active.lock);
> + if (unlikely(rq_prio(rq) < queue_prio(sched_engine))) {
> + spin_unlock(&ve->base.sched_engine->lock);
> break;
> }
>
> if (last && !can_merge_rq(last, rq)) {
> - spin_unlock(&ve->base.active.lock);
> - spin_unlock(&engine->active.lock);
> + spin_unlock(&ve->base.sched_engine->lock);
> + spin_unlock(&sched_engine->lock);
> return; /* leave this for another sibling */
> }
>
> @@ -1405,7 +1407,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> yesno(engine != ve->siblings[0]));
>
> WRITE_ONCE(ve->request, NULL);
> - WRITE_ONCE(ve->base.execlists.queue_priority_hint, INT_MIN);
> + WRITE_ONCE(ve->base.sched_engine->queue_priority_hint, INT_MIN);
>
> rb = &ve->nodes[engine->id].rb;
> rb_erase_cached(rb, &execlists->virtual);
> @@ -1437,7 +1439,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
>
> i915_request_put(rq);
> unlock:
> - spin_unlock(&ve->base.active.lock);
> + spin_unlock(&ve->base.sched_engine->lock);
>
> /*
> * Hmm, we have a bunch of virtual engine requests,
> @@ -1450,7 +1452,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> break;
> }
>
> - while ((rb = rb_first_cached(&execlists->queue))) {
> + while ((rb = rb_first_cached(&sched_engine->queue))) {
> struct i915_priolist *p = to_priolist(rb);
> struct i915_request *rq, *rn;
>
> @@ -1529,7 +1531,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> }
> }
>
> - rb_erase_cached(&p->node, &execlists->queue);
> + rb_erase_cached(&p->node, &sched_engine->queue);
> i915_priolist_free(p);
> }
> done:
> @@ -1551,8 +1553,9 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> * request triggering preemption on the next dequeue (or subsequent
> * interrupt for secondary ports).
> */
> - execlists->queue_priority_hint = queue_prio(execlists);
> - spin_unlock(&engine->active.lock);
> + sched_engine->queue_priority_hint = queue_prio(sched_engine);
> + i915_sched_engine_reset_on_empty(sched_engine);
> + spin_unlock(&sched_engine->lock);
>
> /*
> * We can skip poking the HW if we ended up with exactly the same set
> @@ -1767,8 +1770,8 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
> * access. Either we are inside the tasklet, or the tasklet is disabled
> * and we assume that is only inside the reset paths and so serialised.
> */
> - GEM_BUG_ON(!tasklet_is_locked(&execlists->tasklet) &&
> - !reset_in_progress(execlists));
> + GEM_BUG_ON(!tasklet_is_locked(&engine->sched_engine->tasklet) &&
> + !reset_in_progress(engine));
>
> /*
> * Note that csb_write, csb_status may be either in HWSP or mmio.
> @@ -1866,12 +1869,12 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
> smp_wmb(); /* notify execlists_active() */
>
> /* cancel old inflight, prepare for switch */
> - trace_ports(execlists, "preempted", old);
> + trace_ports(engine, execlists, "preempted", old);
> while (*old)
> *inactive++ = *old++;
>
> /* switch pending to inflight */
> - GEM_BUG_ON(!assert_pending_valid(execlists, "promote"));
> + GEM_BUG_ON(!assert_pending_valid(engine, execlists, "promote"));
> copy_ports(execlists->inflight,
> execlists->pending,
> execlists_num_ports(execlists));
> @@ -1889,7 +1892,7 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
> }
>
> /* port0 completed, advanced to port1 */
> - trace_ports(execlists, "completed", execlists->active);
> + trace_ports(engine, execlists, "completed", execlists->active);
>
> /*
> * We rely on the hardware being strongly
> @@ -1979,7 +1982,7 @@ static void __execlists_hold(struct i915_request *rq)
> __i915_request_unsubmit(rq);
>
> clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
> - list_move_tail(&rq->sched.link, &rq->engine->active.hold);
> + list_move_tail(&rq->sched.link, &rq->engine->sched_engine->hold);
> i915_request_set_hold(rq);
> RQ_TRACE(rq, "on hold\n");
>
> @@ -2016,7 +2019,7 @@ static bool execlists_hold(struct intel_engine_cs *engine,
> if (i915_request_on_hold(rq))
> return false;
>
> - spin_lock_irq(&engine->active.lock);
> + spin_lock_irq(&engine->sched_engine->lock);
>
> if (__i915_request_is_complete(rq)) { /* too late! */
> rq = NULL;
> @@ -2032,10 +2035,10 @@ static bool execlists_hold(struct intel_engine_cs *engine,
> GEM_BUG_ON(i915_request_on_hold(rq));
> GEM_BUG_ON(rq->engine != engine);
> __execlists_hold(rq);
> - GEM_BUG_ON(list_empty(&engine->active.hold));
> + GEM_BUG_ON(list_empty(&engine->sched_engine->hold));
>
> unlock:
> - spin_unlock_irq(&engine->active.lock);
> + spin_unlock_irq(&engine->sched_engine->lock);
> return rq;
> }
>
> @@ -2079,7 +2082,7 @@ static void __execlists_unhold(struct i915_request *rq)
>
> i915_request_clear_hold(rq);
> list_move_tail(&rq->sched.link,
> - i915_sched_lookup_priolist(rq->engine,
> + i915_sched_lookup_priolist(rq->engine->sched_engine,
> rq_prio(rq)));
> set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
>
> @@ -2115,7 +2118,7 @@ static void __execlists_unhold(struct i915_request *rq)
> static void execlists_unhold(struct intel_engine_cs *engine,
> struct i915_request *rq)
> {
> - spin_lock_irq(&engine->active.lock);
> + spin_lock_irq(&engine->sched_engine->lock);
>
> /*
> * Move this request back to the priority queue, and all of its
> @@ -2123,12 +2126,12 @@ static void execlists_unhold(struct intel_engine_cs *engine,
> */
> __execlists_unhold(rq);
>
> - if (rq_prio(rq) > engine->execlists.queue_priority_hint) {
> - engine->execlists.queue_priority_hint = rq_prio(rq);
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + if (rq_prio(rq) > engine->sched_engine->queue_priority_hint) {
> + engine->sched_engine->queue_priority_hint = rq_prio(rq);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> }
>
> - spin_unlock_irq(&engine->active.lock);
> + spin_unlock_irq(&engine->sched_engine->lock);
> }
>
> struct execlists_capture {
> @@ -2258,13 +2261,13 @@ static void execlists_capture(struct intel_engine_cs *engine)
> if (!cap)
> return;
>
> - spin_lock_irq(&engine->active.lock);
> + spin_lock_irq(&engine->sched_engine->lock);
> cap->rq = active_context(engine, active_ccid(engine));
> if (cap->rq) {
> cap->rq = active_request(cap->rq->context->timeline, cap->rq);
> cap->rq = i915_request_get_rcu(cap->rq);
> }
> - spin_unlock_irq(&engine->active.lock);
> + spin_unlock_irq(&engine->sched_engine->lock);
> if (!cap->rq)
> goto err_free;
>
> @@ -2316,13 +2319,13 @@ static void execlists_reset(struct intel_engine_cs *engine, const char *msg)
> ENGINE_TRACE(engine, "reset for %s\n", msg);
>
> /* Mark this tasklet as disabled to avoid waiting for it to complete */
> - tasklet_disable_nosync(&engine->execlists.tasklet);
> + tasklet_disable_nosync(&engine->sched_engine->tasklet);
>
> ring_set_paused(engine, 1); /* Freeze the current request in place */
> execlists_capture(engine);
> intel_engine_reset(engine, msg);
>
> - tasklet_enable(&engine->execlists.tasklet);
> + tasklet_enable(&engine->sched_engine->tasklet);
> clear_and_wake_up_bit(bit, lock);
> }
>
> @@ -2345,8 +2348,9 @@ static bool preempt_timeout(const struct intel_engine_cs *const engine)
> */
> static void execlists_submission_tasklet(struct tasklet_struct *t)
> {
> - struct intel_engine_cs * const engine =
> - from_tasklet(engine, t, execlists.tasklet);
> + struct i915_sched_engine *sched_engine =
> + from_tasklet(sched_engine, t, tasklet);
> + struct intel_engine_cs * const engine = sched_engine->engine;
> struct i915_request *post[2 * EXECLIST_MAX_PORTS];
> struct i915_request **inactive;
>
> @@ -2421,13 +2425,16 @@ static void execlists_irq_handler(struct intel_engine_cs *engine, u16 iir)
> intel_engine_signal_breadcrumbs(engine);
>
> if (tasklet)
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> }
>
> static void __execlists_kick(struct intel_engine_execlists *execlists)
> {
> + struct intel_engine_cs *engine =
> + container_of(execlists, typeof(*engine), execlists);
> +
> /* Kick the tasklet for some interrupt coalescing and reset handling */
> - tasklet_hi_schedule(&execlists->tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> }
>
> #define execlists_kick(t, member) \
> @@ -2448,19 +2455,20 @@ static void queue_request(struct intel_engine_cs *engine,
> {
> GEM_BUG_ON(!list_empty(&rq->sched.link));
> list_add_tail(&rq->sched.link,
> - i915_sched_lookup_priolist(engine, rq_prio(rq)));
> + i915_sched_lookup_priolist(engine->sched_engine,
> + rq_prio(rq)));
> set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
> }
>
> static bool submit_queue(struct intel_engine_cs *engine,
> const struct i915_request *rq)
> {
> - struct intel_engine_execlists *execlists = &engine->execlists;
> + struct i915_sched_engine *sched_engine = engine->sched_engine;
>
> - if (rq_prio(rq) <= execlists->queue_priority_hint)
> + if (rq_prio(rq) <= sched_engine->queue_priority_hint)
> return false;
>
> - execlists->queue_priority_hint = rq_prio(rq);
> + sched_engine->queue_priority_hint = rq_prio(rq);
> return true;
> }
>
> @@ -2468,7 +2476,7 @@ static bool ancestor_on_hold(const struct intel_engine_cs *engine,
> const struct i915_request *rq)
> {
> GEM_BUG_ON(i915_request_on_hold(rq));
> - return !list_empty(&engine->active.hold) && hold_request(rq);
> + return !list_empty(&engine->sched_engine->hold) && hold_request(rq);
> }
>
> static void execlists_submit_request(struct i915_request *request)
> @@ -2477,23 +2485,24 @@ static void execlists_submit_request(struct i915_request *request)
> unsigned long flags;
>
> /* Will be called from irq-context when using foreign fences. */
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> if (unlikely(ancestor_on_hold(engine, request))) {
> RQ_TRACE(request, "ancestor on hold\n");
> - list_add_tail(&request->sched.link, &engine->active.hold);
> + list_add_tail(&request->sched.link,
> + &engine->sched_engine->hold);
> i915_request_set_hold(request);
> } else {
> queue_request(engine, request);
>
> - GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
> + GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));
> GEM_BUG_ON(list_empty(&request->sched.link));
>
> if (submit_queue(engine, request))
> - __execlists_kick(&engine->execlists);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> }
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static int
> @@ -2800,10 +2809,10 @@ static int execlists_resume(struct intel_engine_cs *engine)
>
> static void execlists_reset_prepare(struct intel_engine_cs *engine)
> {
> - struct intel_engine_execlists * const execlists = &engine->execlists;
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
>
> ENGINE_TRACE(engine, "depth<-%d\n",
> - atomic_read(&execlists->tasklet.count));
> + atomic_read(&sched_engine->tasklet.count));
>
> /*
> * Prevent request submission to the hardware until we have
> @@ -2814,8 +2823,8 @@ static void execlists_reset_prepare(struct intel_engine_cs *engine)
> * Turning off the execlists->tasklet until the reset is over
> * prevents the race.
> */
> - __tasklet_disable_sync_once(&execlists->tasklet);
> - GEM_BUG_ON(!reset_in_progress(execlists));
> + __tasklet_disable_sync_once(&sched_engine->tasklet);
> + GEM_BUG_ON(!reset_in_progress(engine));
>
> /*
> * We stop engines, otherwise we might get failed reset and a
> @@ -2957,23 +2966,25 @@ static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)
>
> /* Push back any incomplete requests for replay after the reset. */
> rcu_read_lock();
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
> __unwind_incomplete_requests(engine);
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> rcu_read_unlock();
> }
>
> static void nop_submission_tasklet(struct tasklet_struct *t)
> {
> - struct intel_engine_cs * const engine =
> - from_tasklet(engine, t, execlists.tasklet);
> + struct i915_sched_engine *sched_engine =
> + from_tasklet(sched_engine, t, tasklet);
> + struct intel_engine_cs * const engine = sched_engine->engine;
>
> /* The driver is wedged; don't process any more events. */
> - WRITE_ONCE(engine->execlists.queue_priority_hint, INT_MIN);
> + WRITE_ONCE(engine->sched_engine->queue_priority_hint, INT_MIN);
> }
>
> static void execlists_reset_cancel(struct intel_engine_cs *engine)
> {
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
> struct intel_engine_execlists * const execlists = &engine->execlists;
> struct i915_request *rq, *rn;
> struct rb_node *rb;
> @@ -2998,15 +3009,15 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
> execlists_reset_csb(engine, true);
>
> rcu_read_lock();
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&sched_engine->lock, flags);
>
> /* Mark all executing requests as skipped. */
> - list_for_each_entry(rq, &engine->active.requests, sched.link)
> + list_for_each_entry(rq, &sched_engine->requests, sched.link)
> i915_request_put(i915_request_mark_eio(rq));
> intel_engine_signal_breadcrumbs(engine);
>
> /* Flush the queued requests to the timeline list (for retiring). */
> - while ((rb = rb_first_cached(&execlists->queue))) {
> + while ((rb = rb_first_cached(&sched_engine->queue))) {
> struct i915_priolist *p = to_priolist(rb);
>
> priolist_for_each_request_consume(rq, rn, p) {
> @@ -3016,12 +3027,12 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
> }
> }
>
> - rb_erase_cached(&p->node, &execlists->queue);
> + rb_erase_cached(&p->node, &sched_engine->queue);
> i915_priolist_free(p);
> }
>
> /* On-hold requests will be flushed to timeline upon their release */
> - list_for_each_entry(rq, &engine->active.hold, sched.link)
> + list_for_each_entry(rq, &sched_engine->hold, sched.link)
> i915_request_put(i915_request_mark_eio(rq));
>
> /* Cancel all attached virtual engines */
> @@ -3032,7 +3043,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
> rb_erase_cached(rb, &execlists->virtual);
> RB_CLEAR_NODE(rb);
>
> - spin_lock(&ve->base.active.lock);
> + spin_lock(&ve->base.sched_engine->lock);
> rq = fetch_and_zero(&ve->request);
> if (rq) {
> if (i915_request_mark_eio(rq)) {
> @@ -3042,26 +3053,26 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
> }
> i915_request_put(rq);
>
> - ve->base.execlists.queue_priority_hint = INT_MIN;
> + ve->base.sched_engine->queue_priority_hint = INT_MIN;
> }
> - spin_unlock(&ve->base.active.lock);
> + spin_unlock(&ve->base.sched_engine->lock);
> }
>
> /* Remaining _unready_ requests will be nop'ed when submitted */
>
> - execlists->queue_priority_hint = INT_MIN;
> - execlists->queue = RB_ROOT_CACHED;
> + sched_engine->queue_priority_hint = INT_MIN;
> + sched_engine->queue = RB_ROOT_CACHED;
>
> - GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
> - execlists->tasklet.callback = nop_submission_tasklet;
> + GEM_BUG_ON(__tasklet_is_enabled(&sched_engine->tasklet));
> + sched_engine->tasklet.callback = nop_submission_tasklet;
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> rcu_read_unlock();
> }
>
> static void execlists_reset_finish(struct intel_engine_cs *engine)
> {
> - struct intel_engine_execlists * const execlists = &engine->execlists;
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
>
> /*
> * After a GPU reset, we may have requests to replay. Do so now while
> @@ -3073,14 +3084,14 @@ static void execlists_reset_finish(struct intel_engine_cs *engine)
> * reset as the next level of recovery, and as a final resort we
> * will declare the device wedged.
> */
> - GEM_BUG_ON(!reset_in_progress(execlists));
> + GEM_BUG_ON(!reset_in_progress(engine));
>
> /* And kick in case we missed a new request submission. */
> - if (__tasklet_enable(&execlists->tasklet))
> - __execlists_kick(execlists);
> + if (__tasklet_enable(&sched_engine->tasklet))
> + i915_sched_engine_hi_kick(sched_engine);
>
> ENGINE_TRACE(engine, "depth->%d\n",
> - atomic_read(&execlists->tasklet.count));
> + atomic_read(&sched_engine->tasklet.count));
> }
>
> static void gen8_logical_ring_enable_irq(struct intel_engine_cs *engine)
> @@ -3110,11 +3121,59 @@ static bool can_preempt(struct intel_engine_cs *engine)
> return engine->class != RENDER_CLASS;
> }
>
> +static void kick_execlists(const struct i915_request *rq, int prio)
> +{
> + struct i915_sched_engine *sched_engine = rq->engine->sched_engine;
> + const struct i915_request *inflight;
> +
> + /*
> + * We only need to kick the tasklet once for the high priority
> + * new context we add into the queue.
> + */
> + if (prio <= sched_engine->queue_priority_hint)
> + return;
> +
> + rcu_read_lock();
> +
> + /* Nothing currently active? We're overdue for a submission! */
> + inflight = execlists_active(&rq->engine->execlists);
> + if (!inflight)
> + goto unlock;
> +
> + /*
> + * If we are already the currently executing context, don't
> + * bother evaluating if we should preempt ourselves.
> + */
> + if (inflight->context == rq->context)
> + goto unlock;
> +
> + ENGINE_TRACE(rq->engine,
> + "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
> + prio,
> + rq->fence.context, rq->fence.seqno,
> + inflight->fence.context, inflight->fence.seqno,
> + inflight->sched.attr.priority);
> +
> + sched_engine->queue_priority_hint = prio;
> +
> + /*
> + * Allow preemption of low -> normal -> high, but we do
> + * not allow low priority tasks to preempt other low priority
> + * tasks under the impression that latency for low priority
> + * tasks does not matter (as much as background throughput),
> + * so kiss.
> + */
> + if (prio >= max(I915_PRIORITY_NORMAL, rq_prio(inflight)))
> + i915_sched_engine_hi_kick(sched_engine);
> +
> +unlock:
> + rcu_read_unlock();
> +}
> +
> static void execlists_set_default_submission(struct intel_engine_cs *engine)
> {
> engine->submit_request = execlists_submit_request;
> - engine->schedule = i915_schedule;
> - engine->execlists.tasklet.callback = execlists_submission_tasklet;
> + engine->sched_engine->tasklet.callback = execlists_submission_tasklet;
> }
>
> static void execlists_shutdown(struct intel_engine_cs *engine)
> @@ -3122,7 +3181,7 @@ static void execlists_shutdown(struct intel_engine_cs *engine)
> /* Synchronise with residual timers and any softirq they raise */
> del_timer_sync(&engine->execlists.timer);
> del_timer_sync(&engine->execlists.preempt);
> - tasklet_kill(&engine->execlists.tasklet);
> + i915_sched_engine_kill(engine->sched_engine);
> }
>
> static void execlists_release(struct intel_engine_cs *engine)
> @@ -3238,10 +3297,14 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
> struct intel_uncore *uncore = engine->uncore;
> u32 base = engine->mmio_base;
>
> - tasklet_setup(&engine->execlists.tasklet, execlists_submission_tasklet);
> + tasklet_setup(&engine->sched_engine->tasklet,
> + execlists_submission_tasklet);
> timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
> timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
>
> + engine->sched_engine->schedule = i915_schedule;
> + engine->sched_engine->kick_backend = kick_execlists;
> +
> logical_ring_default_vfuncs(engine);
> logical_ring_default_irqs(engine);
>
> @@ -3286,7 +3349,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
>
> static struct list_head *virtual_queue(struct virtual_engine *ve)
> {
> - return &ve->base.execlists.default_priolist.requests;
> + return &ve->base.sched_engine->default_priolist.requests;
> }
>
> static void rcu_virtual_context_destroy(struct work_struct *wrk)
> @@ -3301,7 +3364,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
> if (unlikely(ve->request)) {
> struct i915_request *old;
>
> - spin_lock_irq(&ve->base.active.lock);
> + spin_lock_irq(&ve->base.sched_engine->lock);
>
> old = fetch_and_zero(&ve->request);
> if (old) {
> @@ -3310,7 +3373,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
> i915_request_put(old);
> }
>
> - spin_unlock_irq(&ve->base.active.lock);
> + spin_unlock_irq(&ve->base.sched_engine->lock);
> }
>
> /*
> @@ -3320,7 +3383,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
> * rbtrees as in the case it is running in parallel, it may reinsert
> * the rb_node into a sibling.
> */
> - tasklet_kill(&ve->base.execlists.tasklet);
> + i915_sched_engine_kill(ve->base.sched_engine);
>
> /* Decouple ourselves from the siblings, no more access allowed. */
> for (n = 0; n < ve->num_siblings; n++) {
> @@ -3330,21 +3393,23 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
> if (RB_EMPTY_NODE(node))
> continue;
>
> - spin_lock_irq(&sibling->active.lock);
> + spin_lock_irq(&sibling->sched_engine->lock);
>
> /* Detachment is lazily performed in the execlists tasklet */
> if (!RB_EMPTY_NODE(node))
> rb_erase_cached(node, &sibling->execlists.virtual);
>
> - spin_unlock_irq(&sibling->active.lock);
> + spin_unlock_irq(&sibling->sched_engine->lock);
> }
> - GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet));
> + GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.sched_engine->tasklet));
> GEM_BUG_ON(!list_empty(virtual_queue(ve)));
>
> lrc_fini(&ve->context);
> intel_context_fini(&ve->context);
>
> intel_breadcrumbs_free(ve->base.breadcrumbs);
> + if (ve->base.sched_engine)
> + i915_sched_engine_put(ve->base.sched_engine);
> intel_engine_free_request_pool(&ve->base);
>
> kfree(ve->bonds);
> @@ -3475,16 +3540,18 @@ static intel_engine_mask_t virtual_submission_mask(struct virtual_engine *ve)
>
> ENGINE_TRACE(&ve->base, "rq=%llx:%lld, mask=%x, prio=%d\n",
> rq->fence.context, rq->fence.seqno,
> - mask, ve->base.execlists.queue_priority_hint);
> + mask, ve->base.sched_engine->queue_priority_hint);
>
> return mask;
> }
>
> static void virtual_submission_tasklet(struct tasklet_struct *t)
> {
> + struct i915_sched_engine *sched_engine =
> + from_tasklet(sched_engine, t, tasklet);
> struct virtual_engine * const ve =
> - from_tasklet(ve, t, base.execlists.tasklet);
> - const int prio = READ_ONCE(ve->base.execlists.queue_priority_hint);
> + (struct virtual_engine *)sched_engine->engine;
> + const int prio = READ_ONCE(ve->base.sched_engine->queue_priority_hint);
> intel_engine_mask_t mask;
> unsigned int n;
>
> @@ -3503,7 +3570,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
> if (!READ_ONCE(ve->request))
> break; /* already handled by a sibling's tasklet */
>
> - spin_lock_irq(&sibling->active.lock);
> + spin_lock_irq(&sibling->sched_engine->lock);
>
> if (unlikely(!(mask & sibling->mask))) {
> if (!RB_EMPTY_NODE(&node->rb)) {
> @@ -3552,11 +3619,11 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
> submit_engine:
> GEM_BUG_ON(RB_EMPTY_NODE(&node->rb));
> node->prio = prio;
> - if (first && prio > sibling->execlists.queue_priority_hint)
> - tasklet_hi_schedule(&sibling->execlists.tasklet);
> + if (first && prio > sibling->sched_engine->queue_priority_hint)
> + i915_sched_engine_hi_kick(sibling->sched_engine);
>
> unlock_engine:
> - spin_unlock_irq(&sibling->active.lock);
> + spin_unlock_irq(&sibling->sched_engine->lock);
>
> if (intel_context_inflight(&ve->context))
> break;
> @@ -3574,7 +3641,7 @@ static void virtual_submit_request(struct i915_request *rq)
>
> GEM_BUG_ON(ve->base.submit_request != virtual_submit_request);
>
> - spin_lock_irqsave(&ve->base.active.lock, flags);
> + spin_lock_irqsave(&ve->base.sched_engine->lock, flags);
>
> /* By the time we resubmit a request, it may be completed */
> if (__i915_request_is_complete(rq)) {
> @@ -3588,16 +3655,16 @@ static void virtual_submit_request(struct i915_request *rq)
> i915_request_put(ve->request);
> }
>
> - ve->base.execlists.queue_priority_hint = rq_prio(rq);
> + ve->base.sched_engine->queue_priority_hint = rq_prio(rq);
> ve->request = i915_request_get(rq);
>
> GEM_BUG_ON(!list_empty(virtual_queue(ve)));
> list_move_tail(&rq->sched.link, virtual_queue(ve));
>
> - tasklet_hi_schedule(&ve->base.execlists.tasklet);
> + i915_sched_engine_hi_kick(ve->base.sched_engine);
>
> unlock:
> - spin_unlock_irqrestore(&ve->base.active.lock, flags);
> + spin_unlock_irqrestore(&ve->base.sched_engine->lock, flags);
> }
>
> static struct ve_bond *
> @@ -3681,19 +3748,24 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
>
> snprintf(ve->base.name, sizeof(ve->base.name), "virtual");
>
> - intel_engine_init_active(&ve->base, ENGINE_VIRTUAL);
> - intel_engine_init_execlists(&ve->base);
> + ve->base.sched_engine = i915_sched_engine_create(ENGINE_VIRTUAL);
> + if (!ve->base.sched_engine) {
> + kfree(ve);
> + return ERR_PTR(-ENOMEM);
> + }
> + ve->base.sched_engine->engine = &ve->base;
>
> ve->base.cops = &virtual_context_ops;
> ve->base.request_alloc = execlists_request_alloc;
>
> - ve->base.schedule = i915_schedule;
> + ve->base.sched_engine->schedule = i915_schedule;
> ve->base.submit_request = virtual_submit_request;
> ve->base.bond_execute = virtual_bond_execute;
>
> INIT_LIST_HEAD(virtual_queue(ve));
> - ve->base.execlists.queue_priority_hint = INT_MIN;
> - tasklet_setup(&ve->base.execlists.tasklet, virtual_submission_tasklet);
> + ve->base.sched_engine->queue_priority_hint = INT_MIN;
> + tasklet_setup(&ve->base.sched_engine->tasklet,
> + virtual_submission_tasklet);
>
> intel_context_init(&ve->context, &ve->base);
>
> @@ -3721,7 +3793,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
> * layering if we handle cloning of the requests and
> * submitting a copy into each backend.
> */
> - if (sibling->execlists.tasklet.callback !=
> + if (sibling->sched_engine->tasklet.callback !=
> execlists_submission_tasklet) {
> err = -ENODEV;
> goto err_put;
> @@ -3756,6 +3828,9 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
> "v%dx%d", ve->base.class, count);
> ve->base.context_size = sibling->context_size;
>
> + ve->base.sched_engine->kick_backend =
> + sibling->sched_engine->kick_backend;
> +
> ve->base.emit_bb_start = sibling->emit_bb_start;
> ve->base.emit_flush = sibling->emit_flush;
> ve->base.emit_init_breadcrumb = sibling->emit_init_breadcrumb;
> @@ -3848,17 +3923,18 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
> int indent),
> unsigned int max)
> {
> + const struct i915_sched_engine *sched_engine = engine->sched_engine;
> const struct intel_engine_execlists *execlists = &engine->execlists;
> struct i915_request *rq, *last;
> unsigned long flags;
> unsigned int count;
> struct rb_node *rb;
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> last = NULL;
> count = 0;
> - list_for_each_entry(rq, &engine->active.requests, sched.link) {
> + list_for_each_entry(rq, &sched_engine->requests, sched.link) {
> if (count++ < max - 1)
> show_request(m, rq, "\t\t", 0);
> else
> @@ -3873,13 +3949,13 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
> show_request(m, last, "\t\t", 0);
> }
>
> - if (execlists->queue_priority_hint != INT_MIN)
> + if (sched_engine->queue_priority_hint != INT_MIN)
> drm_printf(m, "\t\tQueue priority hint: %d\n",
> - READ_ONCE(execlists->queue_priority_hint));
> + READ_ONCE(sched_engine->queue_priority_hint));
>
> last = NULL;
> count = 0;
> - for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) {
> + for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) {
> struct i915_priolist *p = rb_entry(rb, typeof(*p), node);
>
> priolist_for_each_request(rq, p) {
> @@ -3921,7 +3997,7 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
> show_request(m, last, "\t\t", 0);
> }
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
> diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> index 2b6dffcc2262..14aa31879a37 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> @@ -339,9 +339,9 @@ static void reset_rewind(struct intel_engine_cs *engine, bool stalled)
> u32 head;
>
> rq = NULL;
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
> rcu_read_lock();
> - list_for_each_entry(pos, &engine->active.requests, sched.link) {
> + list_for_each_entry(pos, &engine->sched_engine->requests, sched.link) {
> if (!__i915_request_is_complete(pos)) {
> rq = pos;
> break;
> @@ -396,7 +396,7 @@ static void reset_rewind(struct intel_engine_cs *engine, bool stalled)
> }
> engine->legacy.ring->head = intel_ring_wrap(engine->legacy.ring, head);
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void reset_finish(struct intel_engine_cs *engine)
> @@ -408,16 +408,17 @@ static void reset_cancel(struct intel_engine_cs *engine)
> struct i915_request *request;
> unsigned long flags;
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> /* Mark all submitted requests as skipped. */
> - list_for_each_entry(request, &engine->active.requests, sched.link)
> + list_for_each_entry(request, &engine->sched_engine->requests,
> + sched.link)
> i915_request_put(i915_request_mark_eio(request));
> intel_engine_signal_breadcrumbs(engine);
>
> /* Remaining _unready_ requests will be nop'ed when submitted */
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void i9xx_submit_request(struct i915_request *request)
> diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
> index 32589c6625e1..bd005c1b6fd5 100644
> --- a/drivers/gpu/drm/i915/gt/mock_engine.c
> +++ b/drivers/gpu/drm/i915/gt/mock_engine.c
> @@ -253,10 +253,10 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)
>
> del_timer_sync(&mock->hw_delay);
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> /* Mark all submitted requests as skipped. */
> - list_for_each_entry(rq, &engine->active.requests, sched.link)
> + list_for_each_entry(rq, &engine->sched_engine->requests, sched.link)
> i915_request_put(i915_request_mark_eio(rq));
> intel_engine_signal_breadcrumbs(engine);
>
> @@ -269,7 +269,7 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)
> }
> INIT_LIST_HEAD(&mock->hw_queue);
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void mock_reset_finish(struct intel_engine_cs *engine)
> @@ -283,6 +283,7 @@ static void mock_engine_release(struct intel_engine_cs *engine)
>
> GEM_BUG_ON(timer_pending(&mock->hw_delay));
>
> + i915_sched_engine_put(engine->sched_engine);
> intel_breadcrumbs_free(engine->breadcrumbs);
>
> intel_context_unpin(engine->kernel_context);
> @@ -345,14 +346,18 @@ int mock_engine_init(struct intel_engine_cs *engine)
> {
> struct intel_context *ce;
>
> - intel_engine_init_active(engine, ENGINE_MOCK);
> + engine->sched_engine = i915_sched_engine_create(ENGINE_MOCK);
> + if (!engine->sched_engine)
> + return -ENOMEM;
> + engine->sched_engine->engine = engine;
> +
> intel_engine_init_execlists(engine);
> intel_engine_init__pm(engine);
> intel_engine_init_retire(engine);
>
> engine->breadcrumbs = intel_breadcrumbs_create(NULL);
> if (!engine->breadcrumbs)
> - return -ENOMEM;
> + goto err_schedule;
>
> ce = create_kernel_context(engine);
> if (IS_ERR(ce))
> @@ -366,6 +371,8 @@ int mock_engine_init(struct intel_engine_cs *engine)
>
> err_breadcrumbs:
> intel_breadcrumbs_free(engine->breadcrumbs);
> +err_schedule:
> + i915_sched_engine_put(engine->sched_engine);
> return -ENOMEM;
> }
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c
> index 1f93591a8c69..f349048ccbf6 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_execlists.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c
> @@ -43,7 +43,7 @@ static int wait_for_submit(struct intel_engine_cs *engine,
> unsigned long timeout)
> {
> /* Ignore our own attempts to suppress excess tasklets */
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
>
> timeout += jiffies;
> do {
> @@ -273,7 +273,7 @@ static int live_unlite_restore(struct intel_gt *gt, int prio)
> };
>
> /* Alternatively preempt the spinner with ce[1] */
> - engine->schedule(rq[1], &attr);
> + engine->sched_engine->schedule(rq[1], &attr);
> }
>
> /* And switch back to ce[0] for good measure */
> @@ -606,9 +606,9 @@ static int live_hold_reset(void *arg)
> err = -EBUSY;
> goto out;
> }
> - tasklet_disable(&engine->execlists.tasklet);
> + tasklet_disable(&engine->sched_engine->tasklet);
>
> - engine->execlists.tasklet.callback(&engine->execlists.tasklet);
> + engine->sched_engine->tasklet.callback(&engine->sched_engine->tasklet);
> GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
>
> i915_request_get(rq);
> @@ -618,7 +618,7 @@ static int live_hold_reset(void *arg)
> __intel_engine_reset_bh(engine, NULL);
> GEM_BUG_ON(rq->fence.error != -EIO);
>
> - tasklet_enable(&engine->execlists.tasklet);
> + tasklet_enable(&engine->sched_engine->tasklet);
> clear_and_wake_up_bit(I915_RESET_ENGINE + id,
> >->reset.flags);
> local_bh_enable();
> @@ -900,7 +900,7 @@ release_queue(struct intel_engine_cs *engine,
> i915_request_add(rq);
>
> local_bh_disable();
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
> local_bh_enable(); /* kick tasklet */
>
> i915_request_put(rq);
> @@ -1183,7 +1183,7 @@ static int live_timeslice_rewind(void *arg)
> while (i915_request_is_active(rq[A2])) { /* semaphore yield! */
> /* Wait for the timeslice to kick in */
> del_timer(&engine->execlists.timer);
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> intel_engine_flush_submission(engine);
> }
> /* -> ELSP[] = { { A:rq1 }, { B:rq1 } } */
> @@ -1325,7 +1325,7 @@ static int live_timeslice_queue(void *arg)
> err = PTR_ERR(rq);
> goto err_heartbeat;
> }
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
> err = wait_for_submit(engine, rq, HZ / 2);
> if (err) {
> pr_err("%s: Timed out trying to submit semaphores\n",
> @@ -1867,7 +1867,7 @@ static int live_late_preempt(void *arg)
> }
>
> attr.priority = I915_PRIORITY_MAX;
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
>
> if (!igt_wait_for_spinner(&spin_hi, rq)) {
> pr_err("High priority context failed to preempt the low priority context\n");
> @@ -2480,7 +2480,7 @@ static int live_suppress_self_preempt(void *arg)
> i915_request_add(rq_b);
>
> GEM_BUG_ON(i915_request_completed(rq_a));
> - engine->schedule(rq_a, &attr);
> + engine->sched_engine->schedule(rq_a, &attr);
> igt_spinner_end(&a.spin);
>
> if (!igt_wait_for_spinner(&b.spin, rq_b)) {
> @@ -2612,7 +2612,7 @@ static int live_chain_preempt(void *arg)
>
> i915_request_get(rq);
> i915_request_add(rq);
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
>
> igt_spinner_end(&hi.spin);
> if (i915_request_wait(rq, 0, HZ / 5) < 0) {
> @@ -2971,7 +2971,7 @@ static int live_preempt_gang(void *arg)
> break;
>
> /* Submit each spinner at increasing priority */
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
> } while (prio <= I915_PRIORITY_MAX &&
> !__igt_timeout(end_time, NULL));
> pr_debug("%s: Preempt chain of %d requests\n",
> @@ -3219,7 +3219,7 @@ static int preempt_user(struct intel_engine_cs *engine,
> i915_request_get(rq);
> i915_request_add(rq);
>
> - engine->schedule(rq, &attr);
> + engine->sched_engine->schedule(rq, &attr);
>
> if (i915_request_wait(rq, 0, HZ / 2) < 0)
> err = -ETIME;
> @@ -4593,15 +4593,15 @@ static int reset_virtual_engine(struct intel_gt *gt,
> err = -EBUSY;
> goto out_heartbeat;
> }
> - tasklet_disable(&engine->execlists.tasklet);
> + tasklet_disable(&engine->sched_engine->tasklet);
>
> - engine->execlists.tasklet.callback(&engine->execlists.tasklet);
> + engine->sched_engine->tasklet.callback(&engine->sched_engine->tasklet);
> GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
>
> /* Fake a preemption event; failed of course */
> - spin_lock_irq(&engine->active.lock);
> + spin_lock_irq(&engine->sched_engine->lock);
> __unwind_incomplete_requests(engine);
> - spin_unlock_irq(&engine->active.lock);
> + spin_unlock_irq(&engine->sched_engine->lock);
> GEM_BUG_ON(rq->engine != engine);
>
> /* Reset the engine while keeping our active request on hold */
> @@ -4612,7 +4612,7 @@ static int reset_virtual_engine(struct intel_gt *gt,
> GEM_BUG_ON(rq->fence.error != -EIO);
>
> /* Release our grasp on the engine, letting CS flow again */
> - tasklet_enable(&engine->execlists.tasklet);
> + tasklet_enable(&engine->sched_engine->tasklet);
> clear_and_wake_up_bit(I915_RESET_ENGINE + engine->id, >->reset.flags);
> local_bh_enable();
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
> index 5b63d4df8c93..cbcb800e2ca0 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
> @@ -858,12 +858,12 @@ static int active_engine(void *data)
> rq[idx] = i915_request_get(new);
> i915_request_add(new);
>
> - if (engine->schedule && arg->flags & TEST_PRIORITY) {
> + if (engine->sched_engine->schedule && arg->flags & TEST_PRIORITY) {
> struct i915_sched_attr attr = {
> .priority =
> i915_prandom_u32_max_state(512, &prng),
> };
> - engine->schedule(rq[idx], &attr);
> + engine->sched_engine->schedule(rq[idx], &attr);
> }
>
> err = active_request_put(old);
> @@ -1702,7 +1702,7 @@ static int __igt_atomic_reset_engine(struct intel_engine_cs *engine,
> const struct igt_atomic_section *p,
> const char *mode)
> {
> - struct tasklet_struct * const t = &engine->execlists.tasklet;
> + struct tasklet_struct * const t = &engine->sched_engine->tasklet;
> int err;
>
> GEM_TRACE("i915_reset_engine(%s:%s) under %s\n",
> diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
> index d8f6623524e8..5b40def7cd9d 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
> @@ -49,7 +49,7 @@ static int wait_for_submit(struct intel_engine_cs *engine,
> unsigned long timeout)
> {
> /* Ignore our own attempts to suppress excess tasklets */
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
>
> timeout += jiffies;
> do {
> @@ -1613,12 +1613,12 @@ static void garbage_reset(struct intel_engine_cs *engine,
>
> local_bh_disable();
> if (!test_and_set_bit(bit, lock)) {
> - tasklet_disable(&engine->execlists.tasklet);
> + tasklet_disable(&engine->sched_engine->tasklet);
>
> if (!rq->fence.error)
> __intel_engine_reset_bh(engine, NULL);
>
> - tasklet_enable(&engine->execlists.tasklet);
> + tasklet_enable(&engine->sched_engine->tasklet);
> clear_and_wake_up_bit(bit, lock);
> }
> local_bh_enable();
> diff --git a/drivers/gpu/drm/i915/gt/selftest_reset.c b/drivers/gpu/drm/i915/gt/selftest_reset.c
> index 8784257ec808..7a50c9f4071b 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_reset.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_reset.c
> @@ -321,7 +321,7 @@ static int igt_atomic_engine_reset(void *arg)
> goto out_unlock;
>
> for_each_engine(engine, gt, id) {
> - struct tasklet_struct *t = &engine->execlists.tasklet;
> + struct tasklet_struct *t = &engine->sched_engine->tasklet;
>
> if (t->func)
> tasklet_disable(t);
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> index 38cda5d599a6..b8f9c71af13e 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -181,6 +181,7 @@ static void schedule_out(struct i915_request *rq)
>
> static void __guc_dequeue(struct intel_engine_cs *engine)
> {
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
> struct intel_engine_execlists * const execlists = &engine->execlists;
> struct i915_request **first = execlists->inflight;
> struct i915_request ** const last_port = first + execlists->port_mask;
> @@ -189,7 +190,7 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
> bool submit = false;
> struct rb_node *rb;
>
> - lockdep_assert_held(&engine->active.lock);
> + lockdep_assert_held(&engine->sched_engine->lock);
>
> if (last) {
> if (*++first)
> @@ -204,7 +205,7 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
> * event.
> */
> port = first;
> - while ((rb = rb_first_cached(&execlists->queue))) {
> + while ((rb = rb_first_cached(&sched_engine->queue))) {
> struct i915_priolist *p = to_priolist(rb);
> struct i915_request *rq, *rn;
>
> @@ -224,11 +225,11 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
> last = rq;
> }
>
> - rb_erase_cached(&p->node, &execlists->queue);
> + rb_erase_cached(&p->node, &sched_engine->queue);
> i915_priolist_free(p);
> }
> done:
> - execlists->queue_priority_hint =
> + sched_engine->queue_priority_hint =
> rb ? to_priolist(rb)->priority : INT_MIN;
> if (submit) {
> *port = schedule_in(last, port - execlists->inflight);
> @@ -240,13 +241,14 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
>
> static void guc_submission_tasklet(struct tasklet_struct *t)
> {
> - struct intel_engine_cs * const engine =
> - from_tasklet(engine, t, execlists.tasklet);
> + struct i915_sched_engine *sched_engine =
> + from_tasklet(sched_engine, t, tasklet);
> + struct intel_engine_cs * const engine = sched_engine->engine;
> struct intel_engine_execlists * const execlists = &engine->execlists;
> struct i915_request **port, *rq;
> unsigned long flags;
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> for (port = execlists->inflight; (rq = *port); port++) {
> if (!i915_request_completed(rq))
> @@ -262,20 +264,22 @@ static void guc_submission_tasklet(struct tasklet_struct *t)
>
> __guc_dequeue(engine);
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + i915_sched_engine_reset_on_empty(engine->sched_engine);
> +
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void cs_irq_handler(struct intel_engine_cs *engine, u16 iir)
> {
> if (iir & GT_RENDER_USER_INTERRUPT) {
> intel_engine_signal_breadcrumbs(engine);
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
> }
> }
>
> static void guc_reset_prepare(struct intel_engine_cs *engine)
> {
> - struct intel_engine_execlists * const execlists = &engine->execlists;
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
>
> ENGINE_TRACE(engine, "\n");
>
> @@ -283,12 +287,12 @@ static void guc_reset_prepare(struct intel_engine_cs *engine)
> * Prevent request submission to the hardware until we have
> * completed the reset in i915_gem_reset_finish(). If a request
> * is completed by one engine, it may then queue a request
> - * to a second via its execlists->tasklet *just* as we are
> + * to a second via its sched_engine->tasklet *just* as we are
> * calling engine->init_hw() and also writing the ELSP.
> - * Turning off the execlists->tasklet until the reset is over
> + * Turning off the sched_engine->tasklet until the reset is over
> * prevents the race.
> */
> - __tasklet_disable_sync_once(&execlists->tasklet);
> + __tasklet_disable_sync_once(&sched_engine->tasklet);
> }
>
> static void guc_reset_state(struct intel_context *ce,
> @@ -319,7 +323,7 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
> struct i915_request *rq;
> unsigned long flags;
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> /* Push back any incomplete requests for replay after the reset. */
> rq = execlists_unwind_incomplete_requests(execlists);
> @@ -333,12 +337,12 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
> guc_reset_state(rq->context, engine, rq->head, stalled);
>
> out_unlock:
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void guc_reset_cancel(struct intel_engine_cs *engine)
> {
> - struct intel_engine_execlists * const execlists = &engine->execlists;
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
> struct i915_request *rq, *rn;
> struct rb_node *rb;
> unsigned long flags;
> @@ -359,16 +363,16 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
> * submission's irq state, we also wish to remind ourselves that
> * it is irq state.)
> */
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> /* Mark all executing requests as skipped. */
> - list_for_each_entry(rq, &engine->active.requests, sched.link) {
> + list_for_each_entry(rq, &engine->sched_engine->requests, sched.link) {
> i915_request_set_error_once(rq, -EIO);
> i915_request_mark_complete(rq);
> }
>
> /* Flush the queued requests to the timeline list (for retiring). */
> - while ((rb = rb_first_cached(&execlists->queue))) {
> + while ((rb = rb_first_cached(&sched_engine->queue))) {
> struct i915_priolist *p = to_priolist(rb);
>
> priolist_for_each_request_consume(rq, rn, p) {
> @@ -378,28 +382,28 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
> i915_request_mark_complete(rq);
> }
>
> - rb_erase_cached(&p->node, &execlists->queue);
> + rb_erase_cached(&p->node, &sched_engine->queue);
> i915_priolist_free(p);
> }
>
> /* Remaining _unready_ requests will be nop'ed when submitted */
>
> - execlists->queue_priority_hint = INT_MIN;
> - execlists->queue = RB_ROOT_CACHED;
> + sched_engine->queue_priority_hint = INT_MIN;
> + sched_engine->queue = RB_ROOT_CACHED;
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void guc_reset_finish(struct intel_engine_cs *engine)
> {
> - struct intel_engine_execlists * const execlists = &engine->execlists;
> + struct i915_sched_engine * const sched_engine = engine->sched_engine;
>
> - if (__tasklet_enable(&execlists->tasklet))
> + if (__tasklet_enable(&sched_engine->tasklet))
> /* And kick in case we missed a new request submission. */
> - tasklet_hi_schedule(&execlists->tasklet);
> + i915_sched_engine_hi_kick(sched_engine);
>
> ENGINE_TRACE(engine, "depth->%d\n",
> - atomic_read(&execlists->tasklet.count));
> + atomic_read(&sched_engine->tasklet.count));
> }
>
> /*
> @@ -500,7 +504,7 @@ static inline void queue_request(struct intel_engine_cs *engine,
> {
> GEM_BUG_ON(!list_empty(&rq->sched.link));
> list_add_tail(&rq->sched.link,
> - i915_sched_lookup_priolist(engine, prio));
> + i915_sched_lookup_priolist(engine->sched_engine, prio));
> set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
> }
>
> @@ -510,16 +514,16 @@ static void guc_submit_request(struct i915_request *rq)
> unsigned long flags;
>
> /* Will be called from irq-context when using foreign fences. */
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> queue_request(engine, rq, rq_prio(rq));
>
> - GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
> + GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));
> GEM_BUG_ON(list_empty(&rq->sched.link));
>
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> + i915_sched_engine_hi_kick(engine->sched_engine);
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void sanitize_hwsp(struct intel_engine_cs *engine)
> @@ -597,7 +601,7 @@ static void guc_release(struct intel_engine_cs *engine)
> {
> engine->sanitize = NULL; /* no longer in control, nothing to sanitize */
>
> - tasklet_kill(&engine->execlists.tasklet);
> + tasklet_kill(&engine->sched_engine->tasklet);
>
> intel_engine_cleanup_common(engine);
> lrc_fini_wa_ctx(engine);
> @@ -612,7 +616,7 @@ static void guc_default_vfuncs(struct intel_engine_cs *engine)
> engine->cops = &guc_context_ops;
> engine->request_alloc = guc_request_alloc;
>
> - engine->schedule = i915_schedule;
> + engine->sched_engine->schedule = i915_schedule;
>
> engine->reset.prepare = guc_reset_prepare;
> engine->reset.rewind = guc_reset_rewind;
> @@ -676,7 +680,8 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine)
> */
> GEM_BUG_ON(INTEL_GEN(i915) < 11);
>
> - tasklet_setup(&engine->execlists.tasklet, guc_submission_tasklet);
> + tasklet_setup(&engine->sched_engine->tasklet, guc_submission_tasklet);
> + engine->sched_engine->schedule = i915_schedule;
>
> guc_default_vfuncs(engine);
> guc_default_irqs(engine);
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
> index bb181fe5d47e..3352f56bcf63 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -1247,7 +1247,8 @@ static void record_request(const struct i915_request *request,
>
> static void engine_record_execlists(struct intel_engine_coredump *ee)
> {
> - const struct intel_engine_execlists * const el = &ee->engine->execlists;
> + const struct intel_engine_execlists * const el =
> + &ee->engine->execlists;
> struct i915_request * const *port = el->active;
> unsigned int n = 0;
>
> @@ -1441,12 +1442,12 @@ capture_engine(struct intel_engine_cs *engine,
> if (!ee)
> return NULL;
>
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
> rq = intel_engine_find_active_request(engine);
> if (rq)
> capture = intel_engine_coredump_add_request(ee, rq,
> ATOMIC_MAYFAIL);
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> if (!capture) {
> kfree(ee);
> return NULL;
> diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
> index 970d8f4986bb..4c0df56e3b86 100644
> --- a/drivers/gpu/drm/i915/i915_request.c
> +++ b/drivers/gpu/drm/i915/i915_request.c
> @@ -272,11 +272,11 @@ i915_request_active_engine(struct i915_request *rq,
> * check that we have acquired the lock on the final engine.
> */
> locked = READ_ONCE(rq->engine);
> - spin_lock_irq(&locked->active.lock);
> + spin_lock_irq(&locked->sched_engine->lock);
> while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
> - spin_unlock(&locked->active.lock);
> + spin_unlock(&locked->sched_engine->lock);
> locked = engine;
> - spin_lock(&locked->active.lock);
> + spin_lock(&locked->sched_engine->lock);
> }
>
> if (i915_request_is_active(rq)) {
> @@ -285,7 +285,7 @@ i915_request_active_engine(struct i915_request *rq,
> ret = true;
> }
>
> - spin_unlock_irq(&locked->active.lock);
> + spin_unlock_irq(&locked->sched_engine->lock);
>
> return ret;
> }
> @@ -302,10 +302,10 @@ static void remove_from_engine(struct i915_request *rq)
> * check that the rq still belongs to the newly locked engine.
> */
> locked = READ_ONCE(rq->engine);
> - spin_lock_irq(&locked->active.lock);
> + spin_lock_irq(&locked->sched_engine->lock);
> while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
> - spin_unlock(&locked->active.lock);
> - spin_lock(&engine->active.lock);
> + spin_unlock(&locked->sched_engine->lock);
> + spin_lock(&engine->sched_engine->lock);
> locked = engine;
> }
> list_del_init(&rq->sched.link);
> @@ -316,7 +316,7 @@ static void remove_from_engine(struct i915_request *rq)
> /* Prevent further __await_execution() registering a cb, then flush */
> set_bit(I915_FENCE_FLAG_ACTIVE, &rq->fence.flags);
>
> - spin_unlock_irq(&locked->active.lock);
> + spin_unlock_irq(&locked->sched_engine->lock);
>
> __notify_execute_cb_imm(rq);
> }
> @@ -481,7 +481,7 @@ static bool __request_in_flight(const struct i915_request *signal)
> * may either perform a context switch to the second inflight execlists,
> * or it may switch to the pending set of execlists. In the case of the
> * latter, it may send the ACK and we process the event copying the
> - * pending[] over top of inflight[], _overwriting_ our *active. Since
> + * pending[] over top of inflight[], _overwriting_ our *active-> Since
> * this implies the HW is arbitrating and not struck in *active, we do
> * not worry about complete accuracy, but we do require no read/write
> * tearing of the pointer [the read of the pointer must be valid, even
> @@ -490,7 +490,7 @@ static bool __request_in_flight(const struct i915_request *signal)
> *
> * Note that the read of *execlists->active may race with the promotion
> * of execlists->pending[] to execlists->inflight[], overwritting
> - * the value at *execlists->active. This is fine. The promotion implies
> + * the value at *execlists->active-> This is fine. The promotion implies
> * that we received an ACK from the HW, and so the context is not
> * stuck -- if we do not see ourselves in *active, the inflight status
> * is valid. If instead we see ourselves being copied into *active,
> @@ -545,7 +545,7 @@ __await_execution(struct i915_request *rq,
>
> /*
> * Register the callback first, then see if the signaler is already
> - * active. This ensures that if we race with the
> + * active-> This ensures that if we race with the
> * __notify_execute_cb from i915_request_submit() and we are not
> * included in that list, we get a second bite of the cherry and
> * execute it ourselves. After this point, a future
> @@ -637,7 +637,7 @@ bool __i915_request_submit(struct i915_request *request)
> RQ_TRACE(request, "\n");
>
> GEM_BUG_ON(!irqs_disabled());
> - lockdep_assert_held(&engine->active.lock);
> + lockdep_assert_held(&engine->sched_engine->lock);
>
> /*
> * With the advent of preempt-to-busy, we frequently encounter
> @@ -649,9 +649,9 @@ bool __i915_request_submit(struct i915_request *request)
> *
> * We must remove the request from the caller's priority queue,
> * and the caller must only call us when the request is in their
> - * priority queue, under the active.lock. This ensures that the
> + * priority queue, under the active->lock. This ensures that the
> * request has *not* yet been retired and we can safely move
> - * the request into the engine->active.list where it will be
> + * the request into the engine->sched_engine->list where it will be
> * dropped upon retiring. (Otherwise if resubmit a *retired*
> * request, this would be a horrible use-after-free.)
> */
> @@ -694,7 +694,7 @@ bool __i915_request_submit(struct i915_request *request)
> result = true;
>
> GEM_BUG_ON(test_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags));
> - list_move_tail(&request->sched.link, &engine->active.requests);
> + list_move_tail(&request->sched.link, &engine->sched_engine->requests);
> active:
> clear_bit(I915_FENCE_FLAG_PQUEUE, &request->fence.flags);
> set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags);
> @@ -724,11 +724,11 @@ void i915_request_submit(struct i915_request *request)
> unsigned long flags;
>
> /* Will be called from irq-context when using foreign fences. */
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> __i915_request_submit(request);
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> void __i915_request_unsubmit(struct i915_request *request)
> @@ -742,7 +742,7 @@ void __i915_request_unsubmit(struct i915_request *request)
> RQ_TRACE(request, "\n");
>
> GEM_BUG_ON(!irqs_disabled());
> - lockdep_assert_held(&engine->active.lock);
> + lockdep_assert_held(&engine->sched_engine->lock);
>
> /*
> * Before we remove this breadcrumb from the signal list, we have
> @@ -775,11 +775,11 @@ void i915_request_unsubmit(struct i915_request *request)
> unsigned long flags;
>
> /* Will be called from irq-context when using foreign fences. */
> - spin_lock_irqsave(&engine->active.lock, flags);
> + spin_lock_irqsave(&engine->sched_engine->lock, flags);
>
> __i915_request_unsubmit(request);
>
> - spin_unlock_irqrestore(&engine->active.lock, flags);
> + spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
> }
>
> static void __cancel_request(struct i915_request *rq)
> @@ -1343,7 +1343,7 @@ __i915_request_await_execution(struct i915_request *to,
> }
>
> /* Couple the dependency tree for PI on this exposed to->fence */
> - if (to->engine->schedule) {
> + if (to->engine->sched_engine->schedule) {
> err = i915_sched_node_add_dependency(&to->sched,
> &from->sched,
> I915_DEPENDENCY_WEAK);
> @@ -1484,7 +1484,7 @@ i915_request_await_request(struct i915_request *to, struct i915_request *from)
> return 0;
> }
>
> - if (to->engine->schedule) {
> + if (to->engine->sched_engine->schedule) {
> ret = i915_sched_node_add_dependency(&to->sched,
> &from->sched,
> I915_DEPENDENCY_EXTERNAL);
> @@ -1671,7 +1671,7 @@ __i915_request_add_to_timeline(struct i915_request *rq)
> __i915_sw_fence_await_dma_fence(&rq->submit,
> &prev->fence,
> &rq->dmaq);
> - if (rq->engine->schedule)
> + if (rq->engine->sched_engine->schedule)
> __i915_sched_node_add_dependency(&rq->sched,
> &prev->sched,
> &rq->dep,
> @@ -1743,8 +1743,8 @@ void __i915_request_queue(struct i915_request *rq,
> * decide whether to preempt the entire chain so that it is ready to
> * run at the earliest possible convenience.
> */
> - if (attr && rq->engine->schedule)
> - rq->engine->schedule(rq, attr);
> + if (attr && rq->engine->sched_engine->schedule)
> + rq->engine->sched_engine->schedule(rq, attr);
>
> local_bh_disable();
> __i915_request_queue_bh(rq);
> diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
> index 270f6cd37650..239964bec1fa 100644
> --- a/drivers/gpu/drm/i915/i915_request.h
> +++ b/drivers/gpu/drm/i915/i915_request.h
> @@ -613,7 +613,7 @@ i915_request_active_timeline(const struct i915_request *rq)
> * this submission.
> */
> return rcu_dereference_protected(rq->timeline,
> - lockdep_is_held(&rq->engine->active.lock));
> + lockdep_is_held(&rq->engine->sched_engine->lock));
> }
>
> static inline u32
> diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
> index efa638c3acc7..28d403a8d7d2 100644
> --- a/drivers/gpu/drm/i915/i915_scheduler.c
> +++ b/drivers/gpu/drm/i915/i915_scheduler.c
> @@ -40,7 +40,7 @@ static inline struct i915_priolist *to_priolist(struct rb_node *rb)
> return rb_entry(rb, struct i915_priolist, node);
> }
>
> -static void assert_priolists(struct intel_engine_execlists * const execlists)
> +static void assert_priolists(struct i915_sched_engine * const sched_engine)
> {
> struct rb_node *rb;
> long last_prio;
> @@ -48,11 +48,11 @@ static void assert_priolists(struct intel_engine_execlists * const execlists)
> if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
> return;
>
> - GEM_BUG_ON(rb_first_cached(&execlists->queue) !=
> - rb_first(&execlists->queue.rb_root));
> + GEM_BUG_ON(rb_first_cached(&sched_engine->queue) !=
> + rb_first(&sched_engine->queue.rb_root));
>
> last_prio = INT_MAX;
> - for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) {
> + for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) {
> const struct i915_priolist *p = to_priolist(rb);
>
> GEM_BUG_ON(p->priority > last_prio);
> @@ -61,23 +61,22 @@ static void assert_priolists(struct intel_engine_execlists * const execlists)
> }
>
> struct list_head *
> -i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
> +i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio)
> {
> - struct intel_engine_execlists * const execlists = &engine->execlists;
> struct i915_priolist *p;
> struct rb_node **parent, *rb;
> bool first = true;
>
> - lockdep_assert_held(&engine->active.lock);
> - assert_priolists(execlists);
> + lockdep_assert_held(&sched_engine->lock);
> + assert_priolists(sched_engine);
>
> - if (unlikely(execlists->no_priolist))
> + if (unlikely(sched_engine->no_priolist))
> prio = I915_PRIORITY_NORMAL;
>
> find_priolist:
> /* most positive priority is scheduled first, equal priorities fifo */
> rb = NULL;
> - parent = &execlists->queue.rb_root.rb_node;
> + parent = &sched_engine->queue.rb_root.rb_node;
> while (*parent) {
> rb = *parent;
> p = to_priolist(rb);
> @@ -92,7 +91,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
> }
>
> if (prio == I915_PRIORITY_NORMAL) {
> - p = &execlists->default_priolist;
> + p = &sched_engine->default_priolist;
> } else {
> p = kmem_cache_alloc(global.slab_priorities, GFP_ATOMIC);
> /* Convert an allocation failure to a priority bump */
> @@ -107,7 +106,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
> * requests, so if userspace lied about their
> * dependencies that reordering may be visible.
> */
> - execlists->no_priolist = true;
> + sched_engine->no_priolist = true;
> goto find_priolist;
> }
> }
> @@ -116,7 +115,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
> INIT_LIST_HEAD(&p->requests);
>
> rb_link_node(&p->node, rb, parent);
> - rb_insert_color_cached(&p->node, &execlists->queue, first);
> + rb_insert_color_cached(&p->node, &sched_engine->queue, first);
>
> return &p->requests;
> }
> @@ -130,13 +129,13 @@ struct sched_cache {
> struct list_head *priolist;
> };
>
> -static struct intel_engine_cs *
> -sched_lock_engine(const struct i915_sched_node *node,
> - struct intel_engine_cs *locked,
> +static struct i915_sched_engine *
> +lock_sched_engine(struct i915_sched_node *node,
> + struct i915_sched_engine *locked,
> struct sched_cache *cache)
> {
> const struct i915_request *rq = node_to_request(node);
> - struct intel_engine_cs *engine;
> + struct i915_sched_engine *sched_engine;
>
> GEM_BUG_ON(!locked);
>
> @@ -146,81 +145,22 @@ sched_lock_engine(const struct i915_sched_node *node,
> * engine lock. The simple ploy we use is to take the lock then
> * check that the rq still belongs to the newly locked engine.
> */
> - while (locked != (engine = READ_ONCE(rq->engine))) {
> - spin_unlock(&locked->active.lock);
> + while (locked != (sched_engine = rq->engine->sched_engine)) {
> + spin_unlock(&locked->lock);
> memset(cache, 0, sizeof(*cache));
> - spin_lock(&engine->active.lock);
> - locked = engine;
> + spin_lock(&sched_engine->lock);
> + locked = sched_engine;
> }
>
> - GEM_BUG_ON(locked != engine);
> + GEM_BUG_ON(locked != sched_engine);
> return locked;
> }
>
> -static inline int rq_prio(const struct i915_request *rq)
> -{
> - return rq->sched.attr.priority;
> -}
> -
> -static inline bool need_preempt(int prio, int active)
> -{
> - /*
> - * Allow preemption of low -> normal -> high, but we do
> - * not allow low priority tasks to preempt other low priority
> - * tasks under the impression that latency for low priority
> - * tasks does not matter (as much as background throughput),
> - * so kiss.
> - */
> - return prio >= max(I915_PRIORITY_NORMAL, active);
> -}
> -
> -static void kick_submission(struct intel_engine_cs *engine,
> - const struct i915_request *rq,
> - int prio)
> -{
> - const struct i915_request *inflight;
> -
> - /*
> - * We only need to kick the tasklet once for the high priority
> - * new context we add into the queue.
> - */
> - if (prio <= engine->execlists.queue_priority_hint)
> - return;
> -
> - rcu_read_lock();
> -
> - /* Nothing currently active? We're overdue for a submission! */
> - inflight = execlists_active(&engine->execlists);
> - if (!inflight)
> - goto unlock;
> -
> - /*
> - * If we are already the currently executing context, don't
> - * bother evaluating if we should preempt ourselves.
> - */
> - if (inflight->context == rq->context)
> - goto unlock;
> -
> - ENGINE_TRACE(engine,
> - "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
> - prio,
> - rq->fence.context, rq->fence.seqno,
> - inflight->fence.context, inflight->fence.seqno,
> - inflight->sched.attr.priority);
> -
> - engine->execlists.queue_priority_hint = prio;
> - if (need_preempt(prio, rq_prio(inflight)))
> - tasklet_hi_schedule(&engine->execlists.tasklet);
> -
> -unlock:
> - rcu_read_unlock();
> -}
> -
> static void __i915_schedule(struct i915_sched_node *node,
> const struct i915_sched_attr *attr)
> {
> const int prio = max(attr->priority, node->attr.priority);
> - struct intel_engine_cs *engine;
> + struct i915_sched_engine *sched_engine;
> struct i915_dependency *dep, *p;
> struct i915_dependency stack;
> struct sched_cache cache;
> @@ -295,23 +235,24 @@ static void __i915_schedule(struct i915_sched_node *node,
> }
>
> memset(&cache, 0, sizeof(cache));
> - engine = node_to_request(node)->engine;
> - spin_lock(&engine->active.lock);
> + sched_engine = node_to_request(node)->engine->sched_engine;
> + spin_lock(&sched_engine->lock);
>
> /* Fifo and depth-first replacement ensure our deps execute before us */
> - engine = sched_lock_engine(node, engine, &cache);
> + sched_engine = lock_sched_engine(node, sched_engine, &cache);
> list_for_each_entry_safe_reverse(dep, p, &dfs, dfs_link) {
> INIT_LIST_HEAD(&dep->dfs_link);
>
> node = dep->signaler;
> - engine = sched_lock_engine(node, engine, &cache);
> - lockdep_assert_held(&engine->active.lock);
> + sched_engine = lock_sched_engine(node, sched_engine, &cache);
> + lockdep_assert_held(&sched_engine->lock);
>
> /* Recheck after acquiring the engine->timeline.lock */
> if (prio <= node->attr.priority || node_signaled(node))
> continue;
>
> - GEM_BUG_ON(node_to_request(node)->engine != engine);
> + GEM_BUG_ON(node_to_request(node)->engine->sched_engine !=
> + sched_engine);
>
> WRITE_ONCE(node->attr.priority, prio);
>
> @@ -329,16 +270,17 @@ static void __i915_schedule(struct i915_sched_node *node,
> if (i915_request_in_priority_queue(node_to_request(node))) {
> if (!cache.priolist)
> cache.priolist =
> - i915_sched_lookup_priolist(engine,
> + i915_sched_lookup_priolist(sched_engine,
> prio);
> list_move_tail(&node->link, cache.priolist);
> }
>
> /* Defer (tasklet) submission until after all of our updates. */
> - kick_submission(engine, node_to_request(node), prio);
> + if (sched_engine->kick_backend)
> + sched_engine->kick_backend(node_to_request(node), prio);
> }
>
> - spin_unlock(&engine->active.lock);
> + spin_unlock(&sched_engine->lock);
> }
>
> void i915_schedule(struct i915_request *rq, const struct i915_sched_attr *attr)
> @@ -489,6 +431,50 @@ void i915_request_show_with_schedule(struct drm_printer *m,
> rcu_read_unlock();
> }
>
> +void i915_sched_engine_free(struct kref *kref)
> +{
> + struct i915_sched_engine *sched_engine =
> + container_of(kref, typeof(*sched_engine), ref);
> +
> + i915_sched_engine_kill(sched_engine); /* flush the callback */
> + kfree(sched_engine);
> +}
> +
> +struct i915_sched_engine *
> +i915_sched_engine_create(unsigned int subclass)
> +{
> + struct i915_sched_engine *sched_engine;
> +
> + sched_engine = kzalloc(sizeof(*sched_engine), GFP_KERNEL);
> + if (!sched_engine)
> + return NULL;
> +
> + kref_init(&sched_engine->ref);
> +
> + sched_engine->queue = RB_ROOT_CACHED;
> + sched_engine->queue_priority_hint = INT_MIN;
> +
> + INIT_LIST_HEAD(&sched_engine->requests);
> + INIT_LIST_HEAD(&sched_engine->hold);
> +
> + spin_lock_init(&sched_engine->lock);
> + lockdep_set_subclass(&sched_engine->lock, subclass);
> +
> + /*
> + * Due to an interesting quirk in lockdep's internal debug tracking,
> + * after setting a subclass we must ensure the lock is used. Otherwise,
> + * nr_unused_locks is incremented once too often.
> + */
> +#ifdef CONFIG_DEBUG_LOCK_ALLOC
> + local_irq_disable();
> + lock_map_acquire(&sched_engine->lock.dep_map);
> + lock_map_release(&sched_engine->lock.dep_map);
> + local_irq_enable();
> +#endif
> +
> + return sched_engine;
> +}
> +
> static void i915_global_scheduler_shrink(void)
> {
> kmem_cache_shrink(global.slab_dependencies);
> diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h
> index 858a0938f47a..a78b1f50ecb4 100644
> --- a/drivers/gpu/drm/i915/i915_scheduler.h
> +++ b/drivers/gpu/drm/i915/i915_scheduler.h
> @@ -39,7 +39,7 @@ void i915_schedule(struct i915_request *request,
> const struct i915_sched_attr *attr);
>
> struct list_head *
> -i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio);
> +i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio);
>
> void __i915_priolist_free(struct i915_priolist *p);
> static inline void i915_priolist_free(struct i915_priolist *p)
> @@ -53,4 +53,67 @@ void i915_request_show_with_schedule(struct drm_printer *m,
> const char *prefix,
> int indent);
>
> +struct i915_sched_engine *
> +i915_sched_engine_create(unsigned int subclass);
> +
> +void i915_sched_engine_free(struct kref *kref);
> +
> +static inline struct i915_sched_engine *
> +i915_sched_engine_get(struct i915_sched_engine *sched_engine)
> +{
> + kref_get(&sched_engine->ref);
> + return sched_engine;
> +}
> +
> +static inline void
> +i915_sched_engine_put(struct i915_sched_engine *sched_engine)
> +{
> + kref_put(&sched_engine->ref, i915_sched_engine_free);
> +}
> +
> +static inline bool
> +i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine)
> +{
> + return RB_EMPTY_ROOT(&sched_engine->queue.rb_root);
> +}
> +
> +static inline void
> +i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine)
> +{
> + if (i915_sched_engine_is_empty(sched_engine))
> + sched_engine->no_priolist = false;
> +}
> +
> +static inline void
> +i915_sched_engine_hi_kick(struct i915_sched_engine *sched_engine)
> +{
> + tasklet_hi_schedule(&sched_engine->tasklet);
> +}
> +
> +static inline void
> +i915_sched_engine_kick(struct i915_sched_engine *sched_engine)
> +{
> + tasklet_schedule(&sched_engine->tasklet);
> +}
> +
> +static inline void
> +i915_sched_engine_kill(struct i915_sched_engine *sched_engine)
> +{
> + tasklet_kill(&sched_engine->tasklet);
> +}
> +
> +static inline void
> +sched_engine_active_lock_bh(struct i915_sched_engine *sched_engine)
> +{
> + local_bh_disable(); /* prevent local softirq and lock recursion */
> + tasklet_lock(&sched_engine->tasklet);
> +}
> +
> +static inline void
> +sched_engine_active_unlock_bh(struct i915_sched_engine *sched_engine)
> +{
> + tasklet_unlock(&sched_engine->tasklet);
> + local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
> +}
> +
> #endif /* _I915_SCHEDULER_H_ */
> diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
> index 343ed44d5ed4..90b389ba661b 100644
> --- a/drivers/gpu/drm/i915/i915_scheduler_types.h
> +++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
> @@ -91,4 +91,67 @@ struct i915_dependency {
> &(rq__)->sched.signalers_list, \
> signal_link)
>
> +struct i915_sched_engine {
> + struct kref ref;
> +
> + /*
> + * @lock: Protects requests in priority lists, requests, hold, and
> + * tasklet while running.
> + */
> + spinlock_t lock;
> +
> + /* Execlist specific lists, needed here as protected by lock */
> + struct list_head requests;
> + struct list_head hold; /* ready requests, but on hold */
> +
> + /**
> + * @tasklet: softirq tasklet for bottom handler
> + */
> + struct tasklet_struct tasklet;
> +
> + /**
> + * @default_priolist: priority list for I915_PRIORITY_NORMAL
> + */
> + struct i915_priolist default_priolist;
> +
> + /**
> + * @queue_priority_hint: Highest pending priority.
> + *
> + * When we add requests into the queue, or adjust the priority of
> + * executing requests, we compute the maximum priority of those
> + * pending requests. We can then use this value to determine if
> + * we need to preempt the executing requests to service the queue.
> + * However, since the we may have recorded the priority of an inflight
> + * request we wanted to preempt but since completed, at the time of
> + * dequeuing the priority hint may no longer may match the highest
> + * available request priority.
> + */
> + int queue_priority_hint;
> +
> + /**
> + * @queue: queue of requests, in priority lists
> + */
> + struct rb_root_cached queue;
> +
> + /**
> + * @no_priolist: priority lists disabled
> + */
> + bool no_priolist;
> +
> + /* Back pointer to engine */
> + struct intel_engine_cs *engine;
> +
> + /* Kick backend */
> + void (*kick_backend)(const struct i915_request *rq,
> + int prio);
> +
> + /*
> + * Call when the priority on a request has changed and it and its
> + * dependencies may need rescheduling. Note the request itself may
> + * not be ready to run!
> + */
> + void (*schedule)(struct i915_request *request,
> + const struct i915_sched_attr *attr);
> +};
> +
> #endif /* _I915_SCHEDULER_TYPES_H_ */
> --
> 2.28.0
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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