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[73.67.135.195]) by smtp.gmail.com with ESMTPSA id f8-20020a170902684800b0019aa8149cb3sm8314345pln.219.2023.02.20.12.19.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Feb 2023 12:19:31 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, Daniel Vetter , =?UTF-8?q?Christian=20K=C3=B6nig?= , =?UTF-8?q?Michel=20D=C3=A4nzer?= , Tvrtko Ursulin , Rodrigo Vivi , Alex Deucher , Pekka Paalanen , Simon Ser , Rob Clark , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v5 09/14] drm/syncobj: Add deadline support for syncobj waits Date: Mon, 20 Feb 2023 12:18:56 -0800 Message-Id: <20230220201916.1822214-10-robdclark@gmail.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230220201916.1822214-1-robdclark@gmail.com> References: <20230220201916.1822214-1-robdclark@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Rob Clark Add a new flag to let userspace provide a deadline as a hint for syncobj and timeline waits. This gives a hint to the driver signaling the backing fences about how soon userspace needs it to compete work, so it can addjust GPU frequency accordingly. An immediate deadline can be given to provide something equivalent to i915 "wait boost". v2: Use absolute u64 ns value for deadline hint, drop cap and driver feature flag in favor of allowing count_handles=3D=3D0 as a way for userspace to probe kernel for support of new flag Signed-off-by: Rob Clark --- drivers/gpu/drm/drm_syncobj.c | 59 +++++++++++++++++++++++++++-------- include/uapi/drm/drm.h | 5 +++ 2 files changed, 51 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 0c2be8360525..4f9c3b3906f1 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -973,7 +973,8 @@ static signed long drm_syncobj_array_wait_timeout(struc= t drm_syncobj **syncobjs, uint32_t count, uint32_t flags, signed long timeout, - uint32_t *idx) + uint32_t *idx, + ktime_t *deadline) { struct syncobj_wait_entry *entries; struct dma_fence *fence; @@ -1053,6 +1054,15 @@ static signed long drm_syncobj_array_wait_timeout(st= ruct drm_syncobj **syncobjs, drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]); } =20 + if (deadline) { + for (i =3D 0; i < count; ++i) { + fence =3D entries[i].fence; + if (!fence) + continue; + dma_fence_set_deadline(fence, *deadline); + } + } + do { set_current_state(TASK_INTERRUPTIBLE); =20 @@ -1151,7 +1161,8 @@ static int drm_syncobj_array_wait(struct drm_device *= dev, struct drm_file *file_private, struct drm_syncobj_wait *wait, struct drm_syncobj_timeline_wait *timeline_wait, - struct drm_syncobj **syncobjs, bool timeline) + struct drm_syncobj **syncobjs, bool timeline, + ktime_t *deadline) { signed long timeout =3D 0; uint32_t first =3D ~0; @@ -1162,7 +1173,8 @@ static int drm_syncobj_array_wait(struct drm_device *= dev, NULL, wait->count_handles, wait->flags, - timeout, &first); + timeout, &first, + deadline); if (timeout < 0) return timeout; wait->first_signaled =3D first; @@ -1172,7 +1184,8 @@ static int drm_syncobj_array_wait(struct drm_device *= dev, u64_to_user_ptr(timeline_wait->points), timeline_wait->count_handles, timeline_wait->flags, - timeout, &first); + timeout, &first, + deadline); if (timeout < 0) return timeout; timeline_wait->first_signaled =3D first; @@ -1243,17 +1256,22 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void= *data, { struct drm_syncobj_wait *args =3D data; struct drm_syncobj **syncobjs; + unsigned possible_flags; + ktime_t t, *tp =3D NULL; int ret =3D 0; =20 if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) return -EOPNOTSUPP; =20 - if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | - DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) + possible_flags =3D DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE; + + if (args->flags & ~possible_flags) return -EINVAL; =20 if (args->count_handles =3D=3D 0) - return -EINVAL; + return 0; =20 ret =3D drm_syncobj_array_find(file_private, u64_to_user_ptr(args->handles), @@ -1262,8 +1280,13 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void = *data, if (ret < 0) return ret; =20 + if (args->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE) { + t =3D ns_to_ktime(args->deadline_ns); + tp =3D &t; + } + ret =3D drm_syncobj_array_wait(dev, file_private, - args, NULL, syncobjs, false); + args, NULL, syncobjs, false, tp); =20 drm_syncobj_array_free(syncobjs, args->count_handles); =20 @@ -1276,18 +1299,23 @@ drm_syncobj_timeline_wait_ioctl(struct drm_device *= dev, void *data, { struct drm_syncobj_timeline_wait *args =3D data; struct drm_syncobj **syncobjs; + unsigned possible_flags; + ktime_t t, *tp =3D NULL; int ret =3D 0; =20 if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) return -EOPNOTSUPP; =20 - if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | - DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT | - DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) + possible_flags =3D DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE | + DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE; + + if (args->flags & ~possible_flags) return -EINVAL; =20 if (args->count_handles =3D=3D 0) - return -EINVAL; + return -0; =20 ret =3D drm_syncobj_array_find(file_private, u64_to_user_ptr(args->handles), @@ -1296,8 +1324,13 @@ drm_syncobj_timeline_wait_ioctl(struct drm_device *d= ev, void *data, if (ret < 0) return ret; =20 + if (args->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE) { + t =3D ns_to_ktime(args->deadline_ns); + tp =3D &t; + } + ret =3D drm_syncobj_array_wait(dev, file_private, - NULL, args, syncobjs, true); + NULL, args, syncobjs, true, tp); =20 drm_syncobj_array_free(syncobjs, args->count_handles); =20 diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 642808520d92..aefc8cc743e0 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -887,6 +887,7 @@ struct drm_syncobj_transfer { #define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0) #define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1) #define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 << 2) /* wait for time po= int to become available */ +#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE (1 << 3) /* set fence deadlin= e based to deadline_nsec/sec */ struct drm_syncobj_wait { __u64 handles; /* absolute timeout */ @@ -895,6 +896,8 @@ struct drm_syncobj_wait { __u32 flags; __u32 first_signaled; /* only valid when not waiting all */ __u32 pad; + /* Deadline hint to set on backing fence(s) in CLOCK_MONOTONIC: */ + __u64 deadline_ns; }; =20 struct drm_syncobj_timeline_wait { @@ -907,6 +910,8 @@ struct drm_syncobj_timeline_wait { __u32 flags; __u32 first_signaled; /* only valid when not waiting all */ __u32 pad; + /* Deadline hint to set on backing fence(s) in CLOCK_MONOTONIC: */ + __u64 deadline_ns; }; =20 =20 --=20 2.39.1