On 02/09/2019 05:02, Chris Wilson wrote:
Now that we now longer need to guarantee that the active callback is
under the struct_mutex, we can lift it out of the i915_gem_park() and
into the engine parking itself.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_pm.c | 19 -------------------
drivers/gpu/drm/i915/gt/intel_engine_pm.c | 15 +++++++++++++++
drivers/gpu/drm/i915/i915_active.c | 1 +
3 files changed, 16 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_pm.c
index 92558fa47108..6e4cc177cc7a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pm.c
@@ -11,29 +11,10 @@
#include "i915_drv.h"
#include "i915_globals.h"
-static void call_idle_barriers(struct intel_engine_cs *engine)
-{
- struct llist_node *node, *next;
-
- llist_for_each_safe(node, next, llist_del_all(&engine->barrier_tasks)) {
- struct dma_fence_cb *cb =
- container_of((struct list_head *)node,
- typeof(*cb), node);
-
- cb->func(NULL, cb);
- }
-}
-
static void i915_gem_park(struct drm_i915_private *i915)
{
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
-
lockdep_assert_held(&i915->drm.struct_mutex);
- for_each_engine(engine, i915, id)
- call_idle_barriers(engine); /* cleanup after wedging */
-
i915_vma_parked(i915);
i915_globals_park();
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index 65b5ca74b394..472b2259f629 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -123,6 +123,19 @@ static bool switch_to_kernel_context(struct intel_engine_cs *engine)
return result;
}
+static void call_idle_barriers(struct intel_engine_cs *engine)
+{
+ struct llist_node *node, *next;
+
+ llist_for_each_safe(node, next, llist_del_all(&engine->barrier_tasks)) {
+ struct dma_fence_cb *cb =
+ container_of((struct list_head *)node,
+ typeof(*cb), node);
+
+ cb->func(NULL, cb);
+ }
+}
+
static int __engine_park(struct intel_wakeref *wf)
{
struct intel_engine_cs *engine =
@@ -142,6 +155,8 @@ static int __engine_park(struct intel_wakeref *wf)
GEM_TRACE("%s\n", engine->name);
+ call_idle_barriers(engine); /* cleanup after wedging */
+
intel_engine_disarm_breadcrumbs(engine);
intel_engine_pool_park(&engine->pool);
diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c
index 2e2ab8176620..dcf5bc1d87e6 100644
--- a/drivers/gpu/drm/i915/i915_active.c
+++ b/drivers/gpu/drm/i915/i915_active.c
@@ -679,6 +679,7 @@ void i915_active_acquire_barrier(struct i915_active *ref)
rb_link_node(&node->node, parent, p);
rb_insert_color(&node->node, &ref->tree);
+ GEM_BUG_ON(!intel_engine_pm_is_awake(engine));
llist_add(barrier_to_ll(node), &engine->barrier_tasks);
intel_engine_pm_put(engine);
}
If the rest plays out this is simple. :)
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Regards,
Tvrtko
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