[Intel-gfx] [PATCH 16/41] drm/i915: Move common active lists from engine to i915_scheduler
Chris Wilson
chris at chris-wilson.co.uk
Mon Jan 25 14:01:11 UTC 2021
Extract the scheduler lists into a related structure, stop sprawling
over struct intel_engine_cs
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 26 +-------------
drivers/gpu/drm/i915/gt/intel_engine_types.h | 8 +----
.../drm/i915/gt/intel_execlists_submission.c | 2 +-
drivers/gpu/drm/i915/gt/mock_engine.c | 2 +-
drivers/gpu/drm/i915/i915_scheduler.c | 34 ++++++++++++++++---
drivers/gpu/drm/i915/i915_scheduler.h | 3 +-
drivers/gpu/drm/i915/i915_scheduler_types.h | 9 +++++
7 files changed, 44 insertions(+), 40 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 3bfd3853c0e9..54b394bd9429 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -576,8 +576,6 @@ void intel_engine_init_execlists(struct intel_engine_cs *engine)
execlists->queue_priority_hint = INT_MIN;
execlists->queue = RB_ROOT_CACHED;
-
- i915_sched_init_ipi(&execlists->ipi);
}
static void cleanup_status_page(struct intel_engine_cs *engine)
@@ -693,7 +691,7 @@ static int engine_setup_common(struct intel_engine_cs *engine)
goto err_status;
}
- intel_engine_init_active(engine, ENGINE_PHYSICAL);
+ i915_sched_init_engine(&engine->active, ENGINE_PHYSICAL);
intel_engine_init_execlists(engine);
intel_engine_init_cmd_parser(engine);
intel_engine_init__pm(engine);
@@ -761,28 +759,6 @@ 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,
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index 9105b7769635..36bcd85cc73b 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -258,8 +258,6 @@ struct intel_engine_execlists {
struct rb_root_cached queue;
struct rb_root_cached virtual;
- struct i915_sched_ipi ipi;
-
/**
* @csb_write: control register for Context Switch buffer
*
@@ -329,11 +327,7 @@ 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 active;
/* keep a request in reserve for a [pm] barrier under oom */
struct i915_request *request_pool;
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index abed9dbef124..ff5025f18560 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -3333,7 +3333,7 @@ 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);
+ i915_sched_init_engine(&ve->base.active, ENGINE_VIRTUAL);
intel_engine_init_execlists(&ve->base);
ve->base.cops = &virtual_context_ops;
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index df7c1b1acc32..217f217200df 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -325,7 +325,7 @@ int mock_engine_init(struct intel_engine_cs *engine)
{
struct intel_context *ce;
- intel_engine_init_active(engine, ENGINE_MOCK);
+ i915_sched_init_engine(&engine->active, ENGINE_MOCK);
intel_engine_init_execlists(engine);
intel_engine_init__pm(engine);
intel_engine_init_retire(engine);
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index 7c93c2a8309b..14c69543a98d 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -85,12 +85,36 @@ static void ipi_schedule(struct work_struct *wrk)
} while (rq);
}
-void i915_sched_init_ipi(struct i915_sched_ipi *ipi)
+static void i915_sched_init_ipi(struct i915_sched_ipi *ipi)
{
INIT_WORK(&ipi->work, ipi_schedule);
ipi->list = NULL;
}
+void i915_sched_init_engine(struct i915_sched_engine *se,
+ unsigned int subclass)
+{
+ spin_lock_init(&se->lock);
+ lockdep_set_subclass(&se->lock, subclass);
+
+ INIT_LIST_HEAD(&se->requests);
+ INIT_LIST_HEAD(&se->hold);
+
+ i915_sched_init_ipi(&se->ipi);
+
+ /*
+ * 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(&se->lock.dep_map);
+ lock_map_release(&se->lock.dep_map);
+ local_irq_enable();
+#endif
+}
+
static void __ipi_add(struct i915_request *rq)
{
#define STUB ((struct i915_request *)1)
@@ -106,13 +130,13 @@ static void __ipi_add(struct i915_request *rq)
return;
}
- first = READ_ONCE(engine->execlists.ipi.list);
- do
+ first = READ_ONCE(engine->active.ipi.list);
+ do {
rq->sched.ipi_link = ptr_pack_bits(first, 1, 1);
- while (!try_cmpxchg(&engine->execlists.ipi.list, &first, rq));
+ } while (!try_cmpxchg(&engine->active.ipi.list, &first, rq));
if (!first)
- queue_work(system_unbound_wq, &engine->execlists.ipi.work);
+ queue_work(system_unbound_wq, &engine->active.ipi.work);
}
/*
diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h
index 6eafda957f64..5c543124bdb9 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.h
+++ b/drivers/gpu/drm/i915/i915_scheduler.h
@@ -35,7 +35,8 @@ int i915_sched_node_add_dependency(struct i915_sched_node *node,
void i915_sched_node_retire(struct i915_sched_node *node);
-void i915_sched_init_ipi(struct i915_sched_ipi *ipi);
+void i915_sched_init_engine(struct i915_sched_engine *se,
+ unsigned int subclass);
void i915_request_set_priority(struct i915_request *request, int prio);
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 5a84d59134ee..f1e9bfa662e2 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -80,6 +80,15 @@ struct i915_sched_ipi {
struct work_struct work;
};
+struct i915_sched_engine {
+ spinlock_t lock; /* protects the scheduling lists and queue */
+
+ struct list_head requests;
+ struct list_head hold; /* ready requests, but on hold */
+
+ struct i915_sched_ipi ipi;
+};
+
struct i915_dependency {
struct i915_sched_node *signaler;
struct i915_sched_node *waiter;
--
2.20.1
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