linux-kernel - [RFC PATCH 4/6] drm/nouveau: Make fence container helper usable driver-wide

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Message-ID: <20250603093130.100159-6-phasta@kernel.org>
Date: Tue,  3 Jun 2025 11:31:29 +0200
From: Philipp Stanner <phasta@...nel.org>
To: Lyude Paul <lyude@...hat.com>,
	Danilo Krummrich <dakr@...nel.org>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Matthew Brost <matthew.brost@...el.com>,
	Philipp Stanner <phasta@...nel.org>,
	Christian König <ckoenig.leichtzumerken@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Tvrtko Ursulin <tvrtko.ursulin@...lia.com>,
	Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
Cc: dri-devel@...ts.freedesktop.org,
	nouveau@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: [RFC PATCH 4/6] drm/nouveau: Make fence container helper usable driver-wide

In order to implement a new DRM GPU scheduler callback in Nouveau, a
helper for obtaining a nouveau_fence from a dma_fence is necessary. Such
a helper exists already inside nouveau_fence.c, called from_fence().

Make that helper available to other C files with a more precise name.

Signed-off-by: Philipp Stanner <phasta@...nel.org>
---
 drivers/gpu/drm/nouveau/nouveau_fence.c | 20 +++++++-------------
 drivers/gpu/drm/nouveau/nouveau_fence.h |  6 ++++++
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index d5654e26d5bc..869d4335c0f4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -38,12 +38,6 @@
 static const struct dma_fence_ops nouveau_fence_ops_uevent;
 static const struct dma_fence_ops nouveau_fence_ops_legacy;
 
-static inline struct nouveau_fence *
-from_fence(struct dma_fence *fence)
-{
-	return container_of(fence, struct nouveau_fence, base);
-}
-
 static inline struct nouveau_fence_chan *
 nouveau_fctx(struct nouveau_fence *fence)
 {
@@ -77,7 +71,7 @@ nouveau_local_fence(struct dma_fence *fence, struct nouveau_drm *drm)
 	    fence->ops != &nouveau_fence_ops_uevent)
 		return NULL;
 
-	return from_fence(fence);
+	return to_nouveau_fence(fence);
 }
 
 void
@@ -268,7 +262,7 @@ nouveau_fence_done(struct nouveau_fence *fence)
 static long
 nouveau_fence_wait_legacy(struct dma_fence *f, bool intr, long wait)
 {
-	struct nouveau_fence *fence = from_fence(f);
+	struct nouveau_fence *fence = to_nouveau_fence(f);
 	unsigned long sleep_time = NSEC_PER_MSEC / 1000;
 	unsigned long t = jiffies, timeout = t + wait;
 
@@ -448,7 +442,7 @@ static const char *nouveau_fence_get_get_driver_name(struct dma_fence *fence)
 
 static const char *nouveau_fence_get_timeline_name(struct dma_fence *f)
 {
-	struct nouveau_fence *fence = from_fence(f);
+	struct nouveau_fence *fence = to_nouveau_fence(f);
 	struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
 
 	return !fctx->dead ? fctx->name : "dead channel";
@@ -462,7 +456,7 @@ static const char *nouveau_fence_get_timeline_name(struct dma_fence *f)
  */
 static bool nouveau_fence_is_signaled(struct dma_fence *f)
 {
-	struct nouveau_fence *fence = from_fence(f);
+	struct nouveau_fence *fence = to_nouveau_fence(f);
 	struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
 	struct nouveau_channel *chan;
 	bool ret = false;
@@ -478,7 +472,7 @@ static bool nouveau_fence_is_signaled(struct dma_fence *f)
 
 static bool nouveau_fence_no_signaling(struct dma_fence *f)
 {
-	struct nouveau_fence *fence = from_fence(f);
+	struct nouveau_fence *fence = to_nouveau_fence(f);
 
 	/*
 	 * caller should have a reference on the fence,
@@ -503,7 +497,7 @@ static bool nouveau_fence_no_signaling(struct dma_fence *f)
 
 static void nouveau_fence_release(struct dma_fence *f)
 {
-	struct nouveau_fence *fence = from_fence(f);
+	struct nouveau_fence *fence = to_nouveau_fence(f);
 	struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
 
 	kref_put(&fctx->fence_ref, nouveau_fence_context_put);
@@ -521,7 +515,7 @@ static const struct dma_fence_ops nouveau_fence_ops_legacy = {
 
 static bool nouveau_fence_enable_signaling(struct dma_fence *f)
 {
-	struct nouveau_fence *fence = from_fence(f);
+	struct nouveau_fence *fence = to_nouveau_fence(f);
 	struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
 	bool ret;
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.h b/drivers/gpu/drm/nouveau/nouveau_fence.h
index 8bc065acfe35..c3595c2197b5 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.h
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.h
@@ -17,6 +17,12 @@ struct nouveau_fence {
 	unsigned long timeout;
 };
 
+static inline struct nouveau_fence *
+to_nouveau_fence(struct dma_fence *fence)
+{
+	return container_of(fence, struct nouveau_fence, base);
+}
+
 int  nouveau_fence_create(struct nouveau_fence **, struct nouveau_channel *);
 int  nouveau_fence_new(struct nouveau_fence **, struct nouveau_channel *);
 void nouveau_fence_unref(struct nouveau_fence **);
-- 
2.49.0