linux-kernel - [PATCH v9 3/8] drm/managed: Add DRM-managed alloc_ordered

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Message-Id: <20250116-google-vkms-managed-v9-3-3e4ae1bd05a0@bootlin.com>
Date: Thu, 16 Jan 2025 18:47:15 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Simona Vetter <simona.vetter@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net, 
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH v9 3/8] drm/managed: Add DRM-managed
 alloc_ordered_workqueue

Add drmm_alloc_ordered_workqueue(), a helper that provides managed ordered
workqueue cleanup. The workqueue will be destroyed with the final
reference of the DRM device.

Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/drm_managed.c |  8 ++++++++
 include/drm/drm_managed.h     | 12 ++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
index 79ce86a5bd67a7201f5d60550a12364f2628e0ec..cc4c463daae7ca44914d3468457a22574cdd0a54 100644
--- a/drivers/gpu/drm/drm_managed.c
+++ b/drivers/gpu/drm/drm_managed.c
@@ -310,3 +310,11 @@ void __drmm_mutex_release(struct drm_device *dev, void *res)
 	mutex_destroy(lock);
 }
 EXPORT_SYMBOL(__drmm_mutex_release);
+
+void __drmm_workqueue_release(struct drm_device *device, void *res)
+{
+	struct workqueue_struct *wq = res;
+
+	destroy_workqueue(wq);
+}
+EXPORT_SYMBOL(__drmm_workqueue_release);
diff --git a/include/drm/drm_managed.h b/include/drm/drm_managed.h
index f547b09ca0239dd7c4fb734038bae4438321395c..53017cc609ac617283e3be70cb5759908b049c4d 100644
--- a/include/drm/drm_managed.h
+++ b/include/drm/drm_managed.h
@@ -127,4 +127,16 @@ void __drmm_mutex_release(struct drm_device *dev, void *res);
 	drmm_add_action_or_reset(dev, __drmm_mutex_release, lock);	     \
 })									     \
 
+void __drmm_workqueue_release(struct drm_device *device, void *wq);
+
+#define drmm_alloc_ordered_workqueue(dev, fmt, flags, args...)					\
+	({											\
+		struct workqueue_struct *wq = alloc_ordered_workqueue(fmt, flags, ##args);	\
+		wq ? ({										\
+			int ret = drmm_add_action_or_reset(dev, __drmm_workqueue_release, wq);	\
+			ret ? ERR_PTR(ret) : wq;						\
+		}) :										\
+			wq;									\
+	})
+
 #endif

-- 
2.47.1