[Intel-gfx] [PATCH 4/8] drm/i915: Move active tracking to i915_sched_engine
Matthew Brost
matthew.brost at intel.com
Tue Jun 15 22:43:54 UTC 2021
Move active request tracking and its lock to i915_sched_engine. This
lock is also the submission lock so having it in the i915_sched_engine
is the correct place.
v3:
(Jason Ekstrand)
Add kernel doc
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
drivers/gpu/drm/i915/gt/intel_engine.h | 2 -
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 43 +++-----
drivers/gpu/drm/i915/gt/intel_engine_types.h | 6 --
.../drm/i915/gt/intel_execlists_submission.c | 98 ++++++++++---------
.../gpu/drm/i915/gt/intel_ring_submission.c | 12 +--
drivers/gpu/drm/i915/gt/mock_engine.c | 7 +-
drivers/gpu/drm/i915/gt/selftest_execlists.c | 4 +-
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 20 ++--
drivers/gpu/drm/i915/i915_gpu_error.c | 4 +-
drivers/gpu/drm/i915/i915_request.c | 32 +++---
drivers/gpu/drm/i915/i915_request.h | 2 +-
drivers/gpu/drm/i915/i915_scheduler.c | 30 ++++--
drivers/gpu/drm/i915/i915_scheduler_types.h | 16 +++
13 files changed, 140 insertions(+), 136 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index 8d9184920c51..a8b2174b4395 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -257,8 +257,6 @@ 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 75a773cd4e24..3c3f09a4acdd 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -721,7 +721,6 @@ static int engine_setup_common(struct intel_engine_cs *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);
@@ -780,11 +779,11 @@ 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 */
@@ -793,28 +792,6 @@ 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,
@@ -962,7 +939,7 @@ 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));
+ GEM_BUG_ON(!list_empty(&engine->sched_engine->requests));
tasklet_kill(&engine->execlists.tasklet); /* flush the callback */
i915_sched_engine_put(engine->sched_engine);
@@ -1355,7 +1332,7 @@ 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.
@@ -1702,7 +1679,7 @@ 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);
@@ -1733,8 +1710,9 @@ 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);
@@ -1814,7 +1792,7 @@ 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);
@@ -1832,7 +1810,8 @@ 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_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index e41a9c3f9269..5e0f39d202ef 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -304,12 +304,6 @@ 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 */
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 47a43aafa39f..0591698573e8 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -325,7 +325,7 @@ static bool need_preempt(const struct intel_engine_cs *engine,
* 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;
@@ -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);
@@ -534,13 +534,13 @@ 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)
@@ -579,7 +579,7 @@ 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.
*/
@@ -1133,7 +1133,8 @@ 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;
}
@@ -1266,7 +1267,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
* and context switches) submission.
*/
- spin_lock(&engine->active.lock);
+ spin_lock(&sched_engine->lock);
/*
* If the queue is higher priority than the last
@@ -1366,7 +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;
}
}
@@ -1376,7 +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)))
@@ -1386,13 +1387,13 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
GEM_BUG_ON(rq->context != &ve->context);
if (unlikely(rq_prio(rq) < queue_prio(sched_engine))) {
- spin_unlock(&ve->base.active.lock);
+ 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(&engine->sched_engine->lock);
return; /* leave this for another sibling */
}
@@ -1438,7 +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,
@@ -1554,7 +1555,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
*/
sched_engine->queue_priority_hint = queue_prio(sched_engine);
i915_sched_engine_reset_on_empty(sched_engine);
- spin_unlock(&engine->active.lock);
+ spin_unlock(&sched_engine->lock);
/*
* We can skip poking the HW if we ended up with exactly the same set
@@ -1981,7 +1982,8 @@ 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");
@@ -2018,7 +2020,7 @@ 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;
@@ -2034,10 +2036,10 @@ 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;
}
@@ -2117,7 +2119,7 @@ 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
@@ -2130,7 +2132,7 @@ static void execlists_unhold(struct intel_engine_cs *engine,
tasklet_hi_schedule(&engine->execlists.tasklet);
}
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
}
struct execlists_capture {
@@ -2260,13 +2262,13 @@ 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;
@@ -2470,7 +2472,7 @@ 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)
@@ -2479,11 +2481,12 @@ 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);
@@ -2495,7 +2498,7 @@ static void execlists_submit_request(struct i915_request *request)
__execlists_kick(&engine->execlists);
}
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static int
@@ -2959,9 +2962,9 @@ 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();
}
@@ -3001,10 +3004,10 @@ 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(&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_put(i915_request_mark_eio(rq));
intel_engine_signal_breadcrumbs(engine);
@@ -3024,7 +3027,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
}
/* 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 */
@@ -3035,7 +3038,7 @@ 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)) {
@@ -3047,7 +3050,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
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 */
@@ -3058,7 +3061,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
execlists->tasklet.callback = nop_submission_tasklet;
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
rcu_read_unlock();
}
@@ -3304,7 +3307,7 @@ 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) {
@@ -3313,7 +3316,7 @@ 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);
}
/*
@@ -3333,13 +3336,13 @@ 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(!list_empty(virtual_queue(ve)));
@@ -3509,7 +3512,7 @@ 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)) {
@@ -3562,7 +3565,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
tasklet_hi_schedule(&sibling->execlists.tasklet);
unlock_engine:
- spin_unlock_irq(&sibling->active.lock);
+ spin_unlock_irq(&sibling->sched_engine->lock);
if (intel_context_inflight(&ve->context))
break;
@@ -3580,7 +3583,7 @@ 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)) {
@@ -3603,7 +3606,7 @@ static void virtual_submit_request(struct i915_request *rq)
tasklet_hi_schedule(&ve->base.execlists.tasklet);
unlock:
- spin_unlock_irqrestore(&ve->base.active.lock, flags);
+ spin_unlock_irqrestore(&ve->base.sched_engine->lock, flags);
}
static struct ve_bond *
@@ -3687,7 +3690,6 @@ 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);
@@ -3860,17 +3862,17 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
unsigned int max)
{
const struct intel_engine_execlists *execlists = &engine->execlists;
- const struct i915_sched_engine *sched_engine = engine->sched_engine;
+ struct i915_sched_engine *sched_engine = engine->sched_engine;
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(&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
@@ -3933,7 +3935,7 @@ 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(&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 0c423f096e2b..5d42a12ef3d6 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 +408,16 @@ 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 b1fdba13e900..a49fd3039f13 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)
@@ -350,7 +350,6 @@ int mock_engine_init(struct intel_engine_cs *engine)
if (!engine->sched_engine)
return -ENOMEM;
- intel_engine_init_active(engine, ENGINE_MOCK);
intel_engine_init_execlists(engine);
intel_engine_init__pm(engine);
intel_engine_init_retire(engine);
diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c
index 1c8108d30b85..da694bad4683 100644
--- a/drivers/gpu/drm/i915/gt/selftest_execlists.c
+++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c
@@ -4610,9 +4610,9 @@ static int reset_virtual_engine(struct intel_gt *gt,
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 */
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 9887a514a4d5..6b8f6544d91a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -190,7 +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(&sched_engine->lock);
if (last) {
if (*++first)
@@ -247,7 +247,7 @@ static void guc_submission_tasklet(struct tasklet_struct *t)
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))
@@ -265,7 +265,7 @@ static void guc_submission_tasklet(struct tasklet_struct *t)
i915_sched_engine_reset_on_empty(engine->sched_engine);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void cs_irq_handler(struct intel_engine_cs *engine, u16 iir)
@@ -322,7 +322,7 @@ 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);
@@ -336,7 +336,7 @@ 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)
@@ -362,10 +362,10 @@ 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(&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_set_error_once(rq, -EIO);
i915_request_mark_complete(rq);
}
@@ -390,7 +390,7 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
sched_engine->queue_priority_hint = INT_MIN;
sched_engine->queue = RB_ROOT_CACHED;
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&sched_engine->lock, flags);
}
static void guc_reset_finish(struct intel_engine_cs *engine)
@@ -513,7 +513,7 @@ 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));
@@ -522,7 +522,7 @@ static void guc_submit_request(struct i915_request *rq)
tasklet_hi_schedule(&engine->execlists.tasklet);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void sanitize_hwsp(struct intel_engine_cs *engine)
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 35c97c39f125..cb182c6d265a 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1436,12 +1436,12 @@ 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 1014c71cf7f5..bd58198735dc 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);
}
@@ -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
@@ -649,7 +649,7 @@ 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 sched_engine->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
* dropped upon retiring. (Otherwise if resubmit a *retired*
@@ -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)
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 2c31e07883ba..4bc6969f6a97 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -68,7 +68,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
struct rb_node **parent, *rb;
bool first = true;
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
assert_priolists(sched_engine);
if (unlikely(sched_engine->no_priolist))
@@ -147,9 +147,9 @@ sched_lock_engine(const struct i915_sched_node *node,
* check that the rq still belongs to the newly locked engine.
*/
while (locked != (engine = READ_ONCE(rq->engine))) {
- spin_unlock(&locked->active.lock);
+ spin_unlock(&locked->sched_engine->lock);
memset(cache, 0, sizeof(*cache));
- spin_lock(&engine->active.lock);
+ spin_lock(&engine->sched_engine->lock);
locked = engine;
}
@@ -296,7 +296,7 @@ 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);
+ spin_lock(&engine->sched_engine->lock);
/* Fifo and depth-first replacement ensure our deps execute before us */
engine = sched_lock_engine(node, engine, &cache);
@@ -305,7 +305,7 @@ static void __i915_schedule(struct i915_sched_node *node,
node = dep->signaler;
engine = sched_lock_engine(node, engine, &cache);
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
/* Recheck after acquiring the engine->timeline.lock */
if (prio <= node->attr.priority || node_signaled(node))
@@ -338,7 +338,7 @@ static void __i915_schedule(struct i915_sched_node *node,
kick_submission(engine, node_to_request(node), prio);
}
- spin_unlock(&engine->active.lock);
+ spin_unlock(&engine->sched_engine->lock);
}
void i915_schedule(struct i915_request *rq, const struct i915_sched_attr *attr)
@@ -511,7 +511,23 @@ i915_sched_engine_create(unsigned int subclass)
sched_engine->queue = RB_ROOT_CACHED;
sched_engine->queue_priority_hint = INT_MIN;
- /* subclass is used in a follow up patch */
+ 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;
}
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 4a7c9f06b40b..74e3bb2b2a65 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -108,6 +108,22 @@ struct i915_sched_engine {
*/
struct kref ref;
+ /**
+ * @lock: protects requests in priority lists, requests, hold and
+ * tasklet while running
+ */
+ spinlock_t lock;
+
+ /**
+ * @requests: list of requests inflight on this schedule engine
+ */
+ struct list_head requests;
+
+ /**
+ * @hold: list of ready requests, but on hold
+ */
+ struct list_head hold;
+
/**
* @default_priolist: priority list for I915_PRIORITY_NORMAL
*/
--
2.28.0
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