[PATCH 16/29] drm/i915: Move common active lists from engine to i915_scheduler
Chris Wilson
chris at chris-wilson.co.uk
Fri Jan 29 14:55:36 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 | 28 ++------------
drivers/gpu/drm/i915/gt/intel_engine_types.h | 8 +---
.../drm/i915/gt/intel_execlists_submission.c | 5 ++-
drivers/gpu/drm/i915/gt/mock_engine.c | 4 +-
drivers/gpu/drm/i915/i915_scheduler.c | 37 +++++++++++++++++--
drivers/gpu/drm/i915/i915_scheduler.h | 5 ++-
drivers/gpu/drm/i915/i915_scheduler_types.h | 13 +++++++
.../gpu/drm/i915/selftests/i915_scheduler.c | 1 +
8 files changed, 62 insertions(+), 39 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index f8d52a03bdf7..62924f7839d1 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 +691,9 @@ 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->name, engine->mask,
+ ENGINE_PHYSICAL);
intel_engine_init_execlists(engine);
intel_engine_init_cmd_parser(engine);
intel_engine_init__pm(engine);
@@ -761,28 +761,6 @@ 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 25551ce4dcc7..db0c5e46d305 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -3341,7 +3341,6 @@ 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.cops = &virtual_context_ops;
@@ -3427,6 +3426,10 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
ve->base.flags |= I915_ENGINE_IS_VIRTUAL;
+ i915_sched_init_engine(&ve->base.active,
+ ve->base.name, ve->base.mask,
+ ENGINE_VIRTUAL);
+
virtual_engine_initial_hint(ve);
return &ve->context;
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index df7c1b1acc32..8357779235f5 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -325,7 +325,9 @@ 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->name, engine->mask,
+ 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 694ca3a3b563..b74e680bec34 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -85,12 +85,41 @@ 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,
+ const char *name,
+ unsigned long mask,
+ unsigned int subclass)
+{
+ spin_lock_init(&se->lock);
+ lockdep_set_subclass(&se->lock, subclass);
+
+ se->name = name;
+ se->mask = mask;
+
+ 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)
@@ -114,13 +143,13 @@ static void __ipi_add(struct i915_request *rq)
}
/* Carefully insert ourselves into the head of the llist */
- first = READ_ONCE(engine->execlists.ipi.list);
+ 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 9543a3e7834e..547bc77e1985 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.h
+++ b/drivers/gpu/drm/i915/i915_scheduler.h
@@ -35,7 +35,10 @@ 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,
+ const char *name,
+ unsigned long mask,
+ 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 11acd0bcb6f2..25736517fcdd 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -22,6 +22,19 @@ struct i915_sched_ipi {
struct work_struct work;
};
+struct i915_sched_engine {
+ spinlock_t lock; /* protects the scheduling lists and queue */
+
+ unsigned long mask;
+
+ struct list_head requests;
+ struct list_head hold; /* ready requests, but on hold */
+
+ struct i915_sched_ipi ipi;
+
+ const char *name;
+};
+
struct i915_sched_attr {
/**
* @priority: execution and service priority
diff --git a/drivers/gpu/drm/i915/selftests/i915_scheduler.c b/drivers/gpu/drm/i915/selftests/i915_scheduler.c
index 40384305bac4..caeb40ad76ad 100644
--- a/drivers/gpu/drm/i915/selftests/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/selftests/i915_scheduler.c
@@ -892,6 +892,7 @@ int i915_scheduler_perf_selftests(struct drm_i915_private *i915)
T(i915_priolist),
T(i915_sched_attr),
T(i915_sched_node),
+ T(i915_sched_engine),
T(i915_dependency),
#undef T
{}
--
2.20.1
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