[Intel-gfx] [PATCH v4 1/4] drm/i915/bdw: Clean up execlist queue items in retire_work
Thomas Daniel
thomas.daniel at intel.com
Fri Nov 7 15:55:50 CET 2014
No longer create a work item to clean each execlist queue item.
Instead, move retired execlist requests to a queue and clean up the
items during retire_requests.
v2: Fix legacy ring path broken during overzealous cleanup
v3: Update idle detection to take execlists queue into account
v4: Grab execlist lock when checking queue state
Issue: VIZ-4274
Signed-off-by: Thomas Daniel <thomas.daniel at intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 9 ++++++
drivers/gpu/drm/i915/intel_lrc.c | 52 ++++++++++++++++++-------------
drivers/gpu/drm/i915/intel_lrc.h | 2 +-
drivers/gpu/drm/i915/intel_ringbuffer.h | 1 +
4 files changed, 41 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 827edb5..408afe7 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2718,6 +2718,15 @@ i915_gem_retire_requests(struct drm_device *dev)
for_each_ring(ring, dev_priv, i) {
i915_gem_retire_requests_ring(ring);
idle &= list_empty(&ring->request_list);
+ if (i915.enable_execlists) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&ring->execlist_lock, flags);
+ idle &= list_empty(&ring->execlist_queue);
+ spin_unlock_irqrestore(&ring->execlist_lock, flags);
+
+ intel_execlists_retire_requests(ring);
+ }
}
if (idle)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index cd74e5c..87ce445 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -386,7 +386,6 @@ static void execlists_context_unqueue(struct intel_engine_cs *ring)
{
struct intel_ctx_submit_request *req0 = NULL, *req1 = NULL;
struct intel_ctx_submit_request *cursor = NULL, *tmp = NULL;
- struct drm_i915_private *dev_priv = ring->dev->dev_private;
assert_spin_locked(&ring->execlist_lock);
@@ -403,7 +402,8 @@ static void execlists_context_unqueue(struct intel_engine_cs *ring)
* will update tail past first request's workload */
cursor->elsp_submitted = req0->elsp_submitted;
list_del(&req0->execlist_link);
- queue_work(dev_priv->wq, &req0->work);
+ list_add_tail(&req0->execlist_link,
+ &ring->execlist_retired_req_list);
req0 = cursor;
} else {
req1 = cursor;
@@ -425,7 +425,6 @@ static void execlists_context_unqueue(struct intel_engine_cs *ring)
static bool execlists_check_remove_request(struct intel_engine_cs *ring,
u32 request_id)
{
- struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct intel_ctx_submit_request *head_req;
assert_spin_locked(&ring->execlist_lock);
@@ -443,7 +442,8 @@ static bool execlists_check_remove_request(struct intel_engine_cs *ring,
if (--head_req->elsp_submitted <= 0) {
list_del(&head_req->execlist_link);
- queue_work(dev_priv->wq, &head_req->work);
+ list_add_tail(&head_req->execlist_link,
+ &ring->execlist_retired_req_list);
return true;
}
}
@@ -512,22 +512,6 @@ void intel_execlists_handle_ctx_events(struct intel_engine_cs *ring)
((u32)ring->next_context_status_buffer & 0x07) << 8);
}
-static void execlists_free_request_task(struct work_struct *work)
-{
- struct intel_ctx_submit_request *req =
- container_of(work, struct intel_ctx_submit_request, work);
- struct drm_device *dev = req->ring->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
-
- intel_runtime_pm_put(dev_priv);
-
- mutex_lock(&dev->struct_mutex);
- i915_gem_context_unreference(req->ctx);
- mutex_unlock(&dev->struct_mutex);
-
- kfree(req);
-}
-
static int execlists_context_queue(struct intel_engine_cs *ring,
struct intel_context *to,
u32 tail)
@@ -544,7 +528,6 @@ static int execlists_context_queue(struct intel_engine_cs *ring,
i915_gem_context_reference(req->ctx);
req->ring = ring;
req->tail = tail;
- INIT_WORK(&req->work, execlists_free_request_task);
intel_runtime_pm_get(dev_priv);
@@ -565,7 +548,8 @@ static int execlists_context_queue(struct intel_engine_cs *ring,
WARN(tail_req->elsp_submitted != 0,
"More than 2 already-submitted reqs queued\n");
list_del(&tail_req->execlist_link);
- queue_work(dev_priv->wq, &tail_req->work);
+ list_add_tail(&tail_req->execlist_link,
+ &ring->execlist_retired_req_list);
}
}
@@ -733,6 +717,29 @@ int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
return 0;
}
+void intel_execlists_retire_requests(struct intel_engine_cs *ring)
+{
+ struct intel_ctx_submit_request *req, *tmp;
+ struct drm_i915_private *dev_priv = ring->dev->dev_private;
+ unsigned long flags;
+ struct list_head retired_list;
+
+ WARN_ON(!mutex_is_locked(&ring->dev->struct_mutex));
+ if (list_empty(&ring->execlist_retired_req_list))
+ return;
+
+ INIT_LIST_HEAD(&retired_list);
+ spin_lock_irqsave(&ring->execlist_lock, flags);
+ list_replace_init(&ring->execlist_retired_req_list, &retired_list);
+ spin_unlock_irqrestore(&ring->execlist_lock, flags);
+
+ list_for_each_entry_safe(req, tmp, &retired_list, execlist_link) {
+ intel_runtime_pm_put(dev_priv);
+ i915_gem_context_unreference(req->ctx);
+ list_del(&req->execlist_link);
+ }
+}
+
void intel_logical_ring_stop(struct intel_engine_cs *ring)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
@@ -1248,6 +1255,7 @@ static int logical_ring_init(struct drm_device *dev, struct intel_engine_cs *rin
init_waitqueue_head(&ring->irq_queue);
INIT_LIST_HEAD(&ring->execlist_queue);
+ INIT_LIST_HEAD(&ring->execlist_retired_req_list);
spin_lock_init(&ring->execlist_lock);
ring->next_context_status_buffer = 0;
diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 33c3b4b..84bbf19 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -104,11 +104,11 @@ struct intel_ctx_submit_request {
u32 tail;
struct list_head execlist_link;
- struct work_struct work;
int elsp_submitted;
};
void intel_execlists_handle_ctx_events(struct intel_engine_cs *ring);
+void intel_execlists_retire_requests(struct intel_engine_cs *ring);
#endif /* _INTEL_LRC_H_ */
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 96479c8..8c002d2 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -235,6 +235,7 @@ struct intel_engine_cs {
/* Execlists */
spinlock_t execlist_lock;
struct list_head execlist_queue;
+ struct list_head execlist_retired_req_list;
u8 next_context_status_buffer;
u32 irq_keep_mask; /* bitmask for interrupts that should not be masked */
int (*emit_request)(struct intel_ringbuffer *ringbuf);
--
1.7.9.5
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