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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: DRI Development <dri-devel@lists.freedesktop.org>
Cc: "Intel Graphics Development" <intel-gfx@lists.freedesktop.org>,
	"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,
	"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 05/65] drm/atomic-helper: Add dma-fence annotations
Date: Fri, 23 Oct 2020 14:21:16 +0200
Message-ID: <20201023122216.2373294-5-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <20201023122216.2373294-1-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 549a31e6042c..23013209d4bf 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;
 }
-- 
2.28.0


       reply index

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20201021163242.1458885-1-daniel.vetter@ffwll.ch>
     [not found] ` <20201023122216.2373294-1-daniel.vetter@ffwll.ch>
2020-10-23 12:21   ` Daniel Vetter [this message]
2020-10-23 12:21   ` [PATCH 06/65] drm/vkms: Annotate vblank timer Daniel Vetter
2020-10-23 12:21   ` [PATCH 07/65] drm/vblank: Annotate with dma-fence signalling section Daniel Vetter
2020-10-23 12:21   ` [PATCH 08/65] drm/amdgpu: add dma-fence annotations to atomic commit path Daniel Vetter
2020-10-23 12:21   ` [PATCH 17/65] drm/scheduler: use dma-fence annotations in main thread Daniel Vetter
2020-10-23 12:21   ` [PATCH 18/65] drm/amdgpu: use dma-fence annotations in cs_submit() Daniel Vetter
2020-10-23 12:21   ` [PATCH 19/65] drm/amdgpu: s/GFP_KERNEL/GFP_ATOMIC in scheduler code Daniel Vetter
2020-10-23 12:21   ` [PATCH 20/65] drm/scheduler: use dma-fence annotations in tdr work Daniel Vetter
2020-10-23 12:21   ` [PATCH 21/65] drm/amdgpu: use dma-fence annotations for gpu reset code Daniel Vetter
2020-10-23 12:21   ` [PATCH 22/65] Revert "drm/amdgpu: add fbdev suspend/resume on gpu reset" Daniel Vetter
2020-10-23 12:21   ` [PATCH 23/65] drm/i915: Annotate dma_fence_work Daniel Vetter
2020-10-23 12:21   ` [PATCH 29/65] s390/pci: Remove races against pte updates Daniel Vetter
2020-10-23 12:26     ` Daniel Vetter
2020-10-23 12:21   ` [PATCH 30/65] drm/exynos: Stop using frame_vector helpers Daniel Vetter
2020-10-23 12:21   ` [PATCH 31/65] drm/exynos: Use FOLL_LONGTERM for g2d cmdlists Daniel Vetter
2020-10-23 12:21   ` [PATCH 32/65] misc/habana: Stop using frame_vector helpers Daniel Vetter
2020-10-23 12:21   ` [PATCH 33/65] misc/habana: Use FOLL_LONGTERM for userptr Daniel Vetter
2020-10-23 12:21   ` [PATCH 34/65] mm/frame-vector: Use FOLL_LONGTERM Daniel Vetter
2020-10-23 12:21   ` [PATCH 35/65] media: videobuf2: Move frame_vector into media subsystem Daniel Vetter
2020-10-23 12:21   ` [PATCH 36/65] mm: Close race in generic_access_phys Daniel Vetter
2020-10-23 12:21   ` [PATCH 37/65] mm: Add unsafe_follow_pfn Daniel Vetter
2020-10-23 12:21   ` [PATCH 38/65] media/videbuf1|2: Mark follow_pfn usage as unsafe Daniel Vetter
2020-10-23 12:21   ` [PATCH 39/65] vfio/type1: Mark follow_pfn " Daniel Vetter
2020-10-23 12:21   ` [PATCH 40/65] PCI: Obey iomem restrictions for procfs mmap Daniel Vetter
2020-10-23 12:21   ` [PATCH 41/65] /dev/mem: Only set filp->f_mapping Daniel Vetter
2020-10-23 12:21   ` [PATCH 42/65] resource: Move devmem revoke code to resource framework Daniel Vetter
2020-10-23 12:21   ` [PATCH 43/65] sysfs: Support zapping of binary attr mmaps Daniel Vetter
2020-10-23 12:21   ` [PATCH 44/65] PCI: Revoke mappings like devmem Daniel Vetter

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