From patchwork Mon Mar 31 21:23:32 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 14034135 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0B082C36016 for ; Mon, 31 Mar 2025 21:23:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B3A3410E18D; Mon, 31 Mar 2025 21:23:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="RlYrDqYn"; dkim-atps=neutral Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5364110E18D for ; Mon, 31 Mar 2025 21:23:38 +0000 (UTC) Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-227a8cdd241so7135765ad.3 for ; Mon, 31 Mar 2025 14:23:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1743456217; x=1744061017; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=oarhOv17S6NDCgmBz46l+qZChOY53z83EqBIJ4rTMrQ=; b=RlYrDqYnQx1pDipHxhzU+mUxzZYlzc57Kemp0KeJjRBYrqAqgw7GVKgrA2VnA5LmM8 i4udSmd63Z+o3MbhpZCjNub8dJkGh5gKMSkMi9ySRmvk6aQf6ZXR6KaclP02ADIgkwI1 DggE/GH3IN3iKS121WPwP+FPhtCwGyvP+PHFXDVFQkWdNqHaDbtMAVbziowm/cdzmzzJ EwOzb14qe/eCImX6G5569s9rWjlek1ky78kPB+k2mYQffUKyAZRkPERNf/cqijxgt+kv DrOUov3zlt7yCjjpzL3HTOdcRFX8RHkQjsW4sXJbAh+aAmPoSAph3b5CDkRF6rtG1iBW bs8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743456217; x=1744061017; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=oarhOv17S6NDCgmBz46l+qZChOY53z83EqBIJ4rTMrQ=; b=kS/s1nOtlSMvcZyyYjmHUBur/DO6SE2js+HH7EBcLxiGmPbOczn0o/nUGBtXx2aJ+F KCZ+BhtnZyHkfaYG0+089Gd/Yu4xs8KQ5snZE+FogZucJftoW/pSaD6hT6ytNCBN9Ox8 ofpHoOduUPb7C+y+QYVPbSL81d5/t7/NGP7xvhbZvX6KUGqlViFmEEaosYrDHXsUtbgp L8K/gv9MAtjUYQyMFk2h/Nd+3hpr9I9tz8IyV8G2zBY+PWigjtLmaRTi8tQyzPdXymTW aKTLWFviGzYmHaeQIPL+llPY9FFtcn7gcipxAuqoFHvUrZOzC6RxdI3OutaTyDaZFRQR 63AQ== X-Gm-Message-State: AOJu0YypgQhkfAEVnr+clofw0VDGWWkjmUk6JfofvAOZzMsX79HEafbS ypy7rlBLABrlYmsxMK55cutiaoJjilJWKN7GoSgC4kLAFZg1DlWe9msDpw== X-Gm-Gg: ASbGncumKzaMBNZPWYQYj+BZ82O2dEhI0Q4peeUC8RvEAu3+ZW86zAb7Li9RAWQpu53 BrAGK1LTjHzenfnhi7uDLsBVS0rjedAuhPnhxJr2Jwfte3otKMoniO15FxxE88lkLBDEWzN31SF orD9mHKJ1cwD0t7h+3/dkcvBrgpPf6ZYuQrhrVTRGB8TP4E35uoXvnj6A3zUb5UgnBK9Tvfrw3S xfrIjaU/csxqRG/QTMbAbqh6ZE0YrPxew4MMcJrqNTBHybpOFFDDWSE4AH6H15ElVHM4o4Ts2cV rlD1a+1cdXQs1zQNY9d/BN+8GMXYlNPstTTa1WdHVxpD8/p1so3CwblIdkuGbYF06KJD+7/B9ya 7FYYpQlD4QJHZfS1xCVU/RIlKIMQ3Zg== X-Google-Smtp-Source: AGHT+IGpFHC2qe1Je4WLPc7fUp41YqQI35b103OmAbhxl9meKcz7jNtqw9rDYNQRmlxEKTc350gKaA== X-Received: by 2002:a05:6a21:1190:b0:1f8:d245:616d with SMTP id adf61e73a8af0-2009f645256mr16990239637.21.1743456217342; Mon, 31 Mar 2025 14:23:37 -0700 (PDT) Received: from localhost ([2a00:79e0:3e00:2601:3afc:446b:f0df:eadc]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-af93b69d996sm6839433a12.22.2025.03.31.14.23.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Mar 2025 14:23:35 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: =?utf-8?q?Christian_K=C3=B6nig?= , Dmitry Osipenko , Rob Clark , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , linux-kernel@vger.kernel.org (open list), linux-media@vger.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK:Keyword:\bdma_(?:buf|fence|resv)\b), linaro-mm-sig@lists.linaro.org (moderated list:DMA BUFFER SHARING FRAMEWORK:Keyword:\bdma_(?:buf|fence|resv)\b) Subject: [PATCH v5] drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syncobjs Date: Mon, 31 Mar 2025 14:23:32 -0700 Message-ID: <20250331212333.16029-1-robdclark@gmail.com> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Rob Clark Add support for exporting a dma_fence fd for a specific point on a timeline. This is needed for vtest/vpipe[1][2] to implement timeline syncobj support, as it needs a way to turn a point on a timeline back into a dma_fence fd. It also closes an odd omission from the syncobj UAPI. [1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33433 [2] https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/805 v2: Add DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE v3: Add unstaged uabi header hunk v4: Also handle IMPORT_SYNC_FILE case v5: Address comments from Dmitry Signed-off-by: Rob Clark Reviewed-by: Dmitry Osipenko --- drivers/gpu/drm/drm_syncobj.c | 45 +++++++++++++++++++++++++++-------- include/uapi/drm/drm.h | 4 ++++ 2 files changed, 39 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 4f2ab8a7b50f..b0a4c58fe726 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -741,7 +741,7 @@ static int drm_syncobj_fd_to_handle(struct drm_file *file_private, } static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private, - int fd, int handle) + int fd, int handle, u64 point) { struct dma_fence *fence = sync_file_get_fence(fd); struct drm_syncobj *syncobj; @@ -755,14 +755,22 @@ static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private, return -ENOENT; } - drm_syncobj_replace_fence(syncobj, fence); + if (point) { + struct dma_fence_chain *chain = dma_fence_chain_alloc(); + if (!chain) + return -ENOMEM; + drm_syncobj_add_point(syncobj, chain, fence, point); + } else { + drm_syncobj_replace_fence(syncobj, fence); + } + dma_fence_put(fence); drm_syncobj_put(syncobj); return 0; } static int drm_syncobj_export_sync_file(struct drm_file *file_private, - int handle, int *p_fd) + int handle, u64 point, int *p_fd) { int ret; struct dma_fence *fence; @@ -772,7 +780,7 @@ static int drm_syncobj_export_sync_file(struct drm_file *file_private, if (fd < 0) return fd; - ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence); + ret = drm_syncobj_find_fence(file_private, handle, point, 0, &fence); if (ret) goto err_put_fd; @@ -869,6 +877,9 @@ drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data, struct drm_file *file_private) { struct drm_syncobj_handle *args = data; + unsigned valid_flags = DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE | + DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE; + u64 point = 0; if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) return -EOPNOTSUPP; @@ -876,13 +887,18 @@ drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data, if (args->pad) return -EINVAL; - if (args->flags != 0 && - args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) + if (args->flags & ~valid_flags) return -EINVAL; + if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE) + point = args->point; + if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) return drm_syncobj_export_sync_file(file_private, args->handle, - &args->fd); + point, &args->fd); + + if (args->point) + return -EINVAL; return drm_syncobj_handle_to_fd(file_private, args->handle, &args->fd); @@ -893,6 +909,9 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, struct drm_file *file_private) { struct drm_syncobj_handle *args = data; + unsigned valid_flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE | + DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE; + u64 point = 0; if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) return -EOPNOTSUPP; @@ -900,14 +919,20 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, if (args->pad) return -EINVAL; - if (args->flags != 0 && - args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) + if (args->flags & ~valid_flags) return -EINVAL; + if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE) + point = args->point; + if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) return drm_syncobj_import_sync_file_fence(file_private, args->fd, - args->handle); + args->handle, + point); + + if (args->point) + return -EINVAL; return drm_syncobj_fd_to_handle(file_private, args->fd, &args->handle); diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 7fba37b94401..e63a71d3c607 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -905,13 +905,17 @@ struct drm_syncobj_destroy { }; #define DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE (1 << 0) +#define DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE (1 << 1) #define DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE (1 << 0) +#define DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE (1 << 1) struct drm_syncobj_handle { __u32 handle; __u32 flags; __s32 fd; __u32 pad; + + __u64 point; }; struct drm_syncobj_transfer {