This was removed in commit 478ffad6d690 ("drm/i915: drop
engine_pin/unpin_breadcrumbs_irq") as the last user had been removed,
but now there is a promise of a new user in the next patch.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_breadcrumbs.c | 24 +++++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_breadcrumbs.h | 3 +++
2 files changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
index 38cc42783dfb..9e67810c7767 100644
--- a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
@@ -310,6 +310,30 @@ void intel_breadcrumbs_reset(struct intel_breadcrumbs *b)
spin_unlock_irqrestore(&b->irq_lock, flags);
}
+void intel_breadcrumbs_pin_irq(struct intel_breadcrumbs *b)
+{
+ if (GEM_DEBUG_WARN_ON(!b->irq_engine))
+ return;
+
+ spin_lock_irq(&b->irq_lock);
+ if (!b->irq_enabled++)
+ irq_enable(b->irq_engine);
+ GEM_BUG_ON(!b->irq_enabled); /* no overflow! */
+ spin_unlock_irq(&b->irq_lock);
+}
+
+void intel_breadcrumbs_unpin_irq(struct intel_breadcrumbs *b)
+{
+ if (GEM_DEBUG_WARN_ON(!b->irq_engine))
+ return;
+
+ spin_lock_irq(&b->irq_lock);
+ GEM_BUG_ON(!b->irq_enabled); /* no underflow! */
+ if (!--b->irq_enabled)
+ irq_disable(b->irq_engine);
+ spin_unlock_irq(&b->irq_lock);
+}
+
void __intel_breadcrumbs_park(struct intel_breadcrumbs *b)
{
if (!READ_ONCE(b->irq_armed))
diff --git a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.h b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.h
index 3ce5ce270b04..c2bb3a79ca9f 100644
--- a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.h
+++ b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.h
@@ -19,6 +19,9 @@ struct intel_breadcrumbs *
intel_breadcrumbs_create(struct intel_engine_cs *irq_engine);
void intel_breadcrumbs_free(struct intel_breadcrumbs *b);
+void intel_breadcrumbs_pin_irq(struct intel_breadcrumbs *b);
+void intel_breadcrumbs_unpin_irq(struct intel_breadcrumbs *b);
+
void intel_breadcrumbs_reset(struct intel_breadcrumbs *b);
void __intel_breadcrumbs_park(struct intel_breadcrumbs *b);
--
2.20.1
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