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[87.106.117.14]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48feb00e5easm36399545e9.13.2026.05.16.04.06.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 May 2026 04:06:49 -0700 (PDT) From: Julian Orth Date: Sat, 16 May 2026 13:06:07 +0200 Subject: [PATCH 04/12] drm/syncobj: add drm_syncobj_register_eventfd Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260516-jorth-syncobj-v1-4-88ede9d98a81@gmail.com> References: <20260516-jorth-syncobj-v1-0-88ede9d98a81@gmail.com> In-Reply-To: <20260516-jorth-syncobj-v1-0-88ede9d98a81@gmail.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Jonathan Corbet , Shuah Khan , Arnd Bergmann , Greg Kroah-Hartman Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-doc@vger.kernel.org, wayland-devel@lists.freedesktop.org, ju.orth@gmail.com X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1778929602; l=3158; i=ju.orth@gmail.com; s=20251120; h=from:subject:message-id; bh=E8KFRmAvFwSHl3US+f+37kFcs+Zh1TZlm/HDUacqWIY=; b=bWpzKA+XEX3J2UNOYwj8QCncPGUIt1EclXXwvNyI/mmaQH21mYNpvhjIrkkFE7rAGXoJvJuvr uSj76PriSooBBU33M65Bq/uYq41w4a4tjHiYN/O/IE29Xyc6bLuV1Yr X-Developer-Key: i=ju.orth@gmail.com; a=ed25519; pk=uM2SS4lelkuIoYHc7v9N9bgBZ3hS632zJS2xjRJLPLI= This makes the logic from drm_syncobj_eventfd_ioctl available to callers that already have a drm_syncobj. Signed-off-by: Julian Orth --- drivers/gpu/drm/drm_syncobj.c | 37 ++++++++++++++++++++++++++++++------- include/drm/drm_syncobj.h | 2 ++ 2 files changed, 32 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 648afd1f4fdd..3e8fb7e0cace 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -1502,8 +1502,6 @@ drm_syncobj_eventfd_ioctl(struct drm_device *dev, void *data, { struct drm_syncobj_eventfd *args = data; struct drm_syncobj *syncobj; - struct eventfd_ctx *ev_fd_ctx; - struct syncobj_eventfd_entry *entry; int ret; if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) @@ -1519,7 +1517,33 @@ drm_syncobj_eventfd_ioctl(struct drm_device *dev, void *data, if (!syncobj) return -ENOENT; - ev_fd_ctx = eventfd_ctx_fdget(args->fd); + ret = drm_syncobj_register_eventfd(syncobj, args->fd, args->point, args->flags); + + drm_syncobj_put(syncobj); + + return ret; +} + +/** + * drm_syncobj_register_eventfd - register an eventfd for a syncobj + * @syncobj: sync object to add the eventfd to + * @ev_fd: eventfd file descriptor to signal + * @point: timeline point to wait for + * @flags: DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE or 0 + * + * Registers an eventfd that will be signaled when the point is + * signaled or available. + * + * Returns 0 on success or a negative error value on failure. + */ +int drm_syncobj_register_eventfd(struct drm_syncobj *syncobj, + int ev_fd, u64 point, u32 flags) +{ + struct eventfd_ctx *ev_fd_ctx; + struct syncobj_eventfd_entry *entry; + int ret; + + ev_fd_ctx = eventfd_ctx_fdget(ev_fd); if (IS_ERR(ev_fd_ctx)) { ret = PTR_ERR(ev_fd_ctx); goto err_fdget; @@ -1532,20 +1556,19 @@ drm_syncobj_eventfd_ioctl(struct drm_device *dev, void *data, } entry->syncobj = syncobj; entry->ev_fd_ctx = ev_fd_ctx; - entry->point = args->point; - entry->flags = args->flags; + entry->point = point; + entry->flags = flags; drm_syncobj_add_eventfd(syncobj, entry); - drm_syncobj_put(syncobj); return 0; err_kzalloc: eventfd_ctx_put(ev_fd_ctx); err_fdget: - drm_syncobj_put(syncobj); return ret; } +EXPORT_SYMBOL(drm_syncobj_register_eventfd); int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data, diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h index 7677fd995be0..85e7ca7f7896 100644 --- a/include/drm/drm_syncobj.h +++ b/include/drm/drm_syncobj.h @@ -134,6 +134,8 @@ signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, uint32_t count, uint32_t flags, signed long timeout, uint32_t *idx, ktime_t *deadline); +int drm_syncobj_register_eventfd(struct drm_syncobj *syncobj, + int ev_fd, u64 point, u32 flags); void drm_syncobj_free(struct kref *kref); int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags, struct dma_fence *fence); -- 2.54.0