[PATCH 01/11] drm/atomic-helper: Add dma-fence annotations

From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: DRI Development <dri-devel@lists.freedesktop.org>
Cc: "Daniel Vetter" <daniel.vetter@ffwll.ch>,
	linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
	linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org,
	"Chris Wilson" <chris@chris-wilson.co.uk>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Daniel Vetter" <daniel.vetter@intel.com>
Subject: [PATCH 01/11] drm/atomic-helper: Add dma-fence annotations
Date: Thu, 21 Jan 2021 16:29:49 +0100	[thread overview]
Message-ID: <20210121152959.1725404-2-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <20210121152959.1725404-1-daniel.vetter@ffwll.ch>

This is a bit disappointing since we need to split the annotations
over all the different parts.

I was considering just leaking the critical section into the
->atomic_commit_tail callback of each driver. But that would mean we
need to pass the fence_cookie into each driver (there's a total of 13
implementations of this hook right now), so bad flag day. And also a
bit leaky abstraction.

Hence just do it function-by-function.

Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: linux-rdma@vger.kernel.org
Cc: amd-gfx@lists.freedesktop.org
Cc: intel-gfx@lists.freedesktop.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 4a66768b6057..69121d2925bd 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1567,6 +1567,7 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done);
 void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state)
 {
 	struct drm_device *dev = old_state->dev;
+	bool fence_cookie = dma_fence_begin_signalling();
 
 	drm_atomic_helper_commit_modeset_disables(dev, old_state);
 
@@ -1578,6 +1579,8 @@ void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state)
 
 	drm_atomic_helper_commit_hw_done(old_state);
 
+	dma_fence_end_signalling(fence_cookie);
+
 	drm_atomic_helper_wait_for_vblanks(dev, old_state);
 
 	drm_atomic_helper_cleanup_planes(dev, old_state);
@@ -1597,6 +1600,7 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_tail);
 void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state)
 {
 	struct drm_device *dev = old_state->dev;
+	bool fence_cookie = dma_fence_begin_signalling();
 
 	drm_atomic_helper_commit_modeset_disables(dev, old_state);
 
@@ -1609,6 +1613,8 @@ void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state)
 
 	drm_atomic_helper_commit_hw_done(old_state);
 
+	dma_fence_end_signalling(fence_cookie);
+
 	drm_atomic_helper_wait_for_vblanks(dev, old_state);
 
 	drm_atomic_helper_cleanup_planes(dev, old_state);
@@ -1624,6 +1630,9 @@ static void commit_tail(struct drm_atomic_state *old_state)
 	ktime_t start;
 	s64 commit_time_ms;
 	unsigned int i, new_self_refresh_mask = 0;
+	bool fence_cookie;
+
+	fence_cookie = dma_fence_begin_signalling();
 
 	funcs = dev->mode_config.helper_private;
 
@@ -1652,6 +1661,8 @@ static void commit_tail(struct drm_atomic_state *old_state)
 		if (new_crtc_state->self_refresh_active)
 			new_self_refresh_mask |= BIT(i);
 
+	dma_fence_end_signalling(fence_cookie);
+
 	if (funcs && funcs->atomic_commit_tail)
 		funcs->atomic_commit_tail(old_state);
 	else
@@ -1810,6 +1821,7 @@ int drm_atomic_helper_commit(struct drm_device *dev,
 			     bool nonblock)
 {
 	int ret;
+	bool fence_cookie;
 
 	if (state->async_update) {
 		ret = drm_atomic_helper_prepare_planes(dev, state);
@@ -1832,6 +1844,8 @@ int drm_atomic_helper_commit(struct drm_device *dev,
 	if (ret)
 		return ret;
 
+	fence_cookie = dma_fence_begin_signalling();
+
 	if (!nonblock) {
 		ret = drm_atomic_helper_wait_for_fences(dev, state, true);
 		if (ret)
@@ -1869,6 +1883,7 @@ int drm_atomic_helper_commit(struct drm_device *dev,
 	 */
 
 	drm_atomic_state_get(state);
+	dma_fence_end_signalling(fence_cookie);
 	if (nonblock)
 		queue_work(system_unbound_wq, &state->commit_work);
 	else
@@ -1877,6 +1892,7 @@ int drm_atomic_helper_commit(struct drm_device *dev,
 	return 0;
 
 err:
+	dma_fence_end_signalling(fence_cookie);
 	drm_atomic_helper_cleanup_planes(dev, state);
 	return ret;
 }
-- 
2.30.0

