From patchwork Thu Mar 2 23:53:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 13158094 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 670EEC7EE30 for ; Thu, 2 Mar 2023 23:54:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8492B10E5B7; Thu, 2 Mar 2023 23:54:15 +0000 (UTC) Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by gabe.freedesktop.org (Postfix) with ESMTPS id DE1F110E5B3; Thu, 2 Mar 2023 23:54:12 +0000 (UTC) Received: by mail-pl1-x635.google.com with SMTP id h8so959382plf.10; Thu, 02 Mar 2023 15:54:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1677801252; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ETqCmTHSSqXnNZWKuQdc5aqtsOAoStUjUTTw9xnexgU=; b=Wg55OsvUwXVKaQjNDTz/HaotujJ91bf00LrX0Y2jNCT07MxMYSqkxfirm/mIkshtNr 8tONL6g+r2yVJldmiMA1cqBIOanTPf9jJ/G9h8BHoC3qLzh8/FMuGFge2z1PDr4nM8OU +mJsenGKeB4rf27qQwYfeDsqBSzf+B83m2vRQrGNCvDkK4HGgJRy87cvWqJcTxkGMqjD qF8rEvrm9eAMcUUfQUkrN2W+xhZfQ7D1XVjGyhoQY49ujoynUK3relJ7EqTJSMNf6Xfg P9nRqP/xAxPECncv/2+hnxYoeyok4ZjO8yvgdx9KefDLkN5PUtCRTrEXQ0DsQ91nP0Si TOPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1677801252; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ETqCmTHSSqXnNZWKuQdc5aqtsOAoStUjUTTw9xnexgU=; b=KKJPLdqkBOFq5MPNxBBue/XqnurkDSWBBcNkNNaxy/3YcBMr4ZkM3LJ0VByEFvOhJx Djd8aYAXsbT24ahAcLDk9TQ5c3UiCqT43QmpkyxNeajIyuw45X8qGcTIRB1T3GhXpC14 t6sj6+5kq08WDzByNOa5102M6MENk3ReD1jP4DDhELDZJEO5TSOwfDTmgdxiZxgNdP6Y wYYWmizsI9Uprky3w855IRWOoeRu5pZksw7WKwZQDk3N73XY0AaYsQzqCy/DQ/9xDkIx iIjrCTJTYrXss8t9xb042pdYDM6L9Mbydtevb3Ei2wfF3Lqhw7MdY8hhWtb8xepIHcVF hDuQ== X-Gm-Message-State: AO0yUKXpjZCLwOv6BF/TxLfhOF5UxN89GcKVtE9b9W6f8SRQ78I5R3EE xrsdGhRASIJbnO3WTwQOIjy26WUY3hc= X-Google-Smtp-Source: AK7set+2NAy/RATNaAwh/ZUEbbMdlGMTUwyYU6TOy47ebkL3RE8iMUJiZwtUW9kAfHidx5nat7Hs9A== X-Received: by 2002:a17:902:d511:b0:19c:e9c4:cc13 with SMTP id b17-20020a170902d51100b0019ce9c4cc13mr68168plg.25.1677801251933; Thu, 02 Mar 2023 15:54:11 -0800 (PST) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id s7-20020a170902988700b00198fb25d09bsm204948plp.237.2023.03.02.15.54.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Mar 2023 15:54:11 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Subject: [PATCH v9 06/15] dma-buf/sync_file: Add SET_DEADLINE ioctl Date: Thu, 2 Mar 2023 15:53:28 -0800 Message-Id: <20230302235356.3148279-7-robdclark@gmail.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230302235356.3148279-1-robdclark@gmail.com> References: <20230302235356.3148279-1-robdclark@gmail.com> 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: , Cc: Rob Clark , Gustavo Padovan , Pekka Paalanen , Tvrtko Ursulin , =?utf-8?q?Christian_K=C3=B6nig?= , =?utf-8?q?Michel_D=C3=A4nzer?= , open list , =?utf-8?q?Christian_K=C3=B6nig?= , "moderated list:DMA BUFFER SHARING FRAMEWORK" , Pekka Paalanen , Luben Tuikov , Rodrigo Vivi , Alex Deucher , freedreno@lists.freedesktop.org, Sumit Semwal , "open list:SYNC FILE FRAMEWORK" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Rob Clark The initial purpose is for igt tests, but this would also be useful for compositors that wait until close to vblank deadline to make decisions about which frame to show. The igt tests can be found at: https://gitlab.freedesktop.org/robclark/igt-gpu-tools/-/commits/fence-deadline v2: Clarify the timebase, add link to igt tests v3: Use u64 value in ns to express deadline. v4: More doc Signed-off-by: Rob Clark Acked-by: Pekka Paalanen --- drivers/dma-buf/dma-fence.c | 3 ++- drivers/dma-buf/sync_file.c | 19 +++++++++++++++++++ include/uapi/linux/sync_file.h | 22 ++++++++++++++++++++++ 3 files changed, 43 insertions(+), 1 deletion(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index f177c56269bb..74e36f6d05b0 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -933,7 +933,8 @@ EXPORT_SYMBOL(dma_fence_wait_any_timeout); * the GPU's devfreq to reduce frequency, when in fact the opposite is what is * needed. * - * To this end, deadline hint(s) can be set on a &dma_fence via &dma_fence_set_deadline. + * To this end, deadline hint(s) can be set on a &dma_fence via &dma_fence_set_deadline + * (or indirectly via userspace facing ioctls like &sync_set_deadline). * The deadline hint provides a way for the waiting driver, or userspace, to * convey an appropriate sense of urgency to the signaling driver. * diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c index af57799c86ce..418021cfb87c 100644 --- a/drivers/dma-buf/sync_file.c +++ b/drivers/dma-buf/sync_file.c @@ -350,6 +350,22 @@ static long sync_file_ioctl_fence_info(struct sync_file *sync_file, return ret; } +static int sync_file_ioctl_set_deadline(struct sync_file *sync_file, + unsigned long arg) +{ + struct sync_set_deadline ts; + + if (copy_from_user(&ts, (void __user *)arg, sizeof(ts))) + return -EFAULT; + + if (ts.pad) + return -EINVAL; + + dma_fence_set_deadline(sync_file->fence, ns_to_ktime(ts.deadline_ns)); + + return 0; +} + static long sync_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -362,6 +378,9 @@ static long sync_file_ioctl(struct file *file, unsigned int cmd, case SYNC_IOC_FILE_INFO: return sync_file_ioctl_fence_info(sync_file, arg); + case SYNC_IOC_SET_DEADLINE: + return sync_file_ioctl_set_deadline(sync_file, arg); + default: return -ENOTTY; } diff --git a/include/uapi/linux/sync_file.h b/include/uapi/linux/sync_file.h index 7e42a5b7558b..d61752dca4c6 100644 --- a/include/uapi/linux/sync_file.h +++ b/include/uapi/linux/sync_file.h @@ -76,6 +76,27 @@ struct sync_file_info { __u64 sync_fence_info; }; +/** + * struct sync_set_deadline - SYNC_IOC_SET_DEADLINE - set a deadline hint on a fence + * @deadline_ns: absolute time of the deadline + * @pad: must be zero + * + * Allows userspace to set a deadline on a fence, see &dma_fence_set_deadline + * + * The timebase for the deadline is CLOCK_MONOTONIC (same as vblank). For + * example + * + * clock_gettime(CLOCK_MONOTONIC, &t); + * deadline_ns = (t.tv_sec * 1000000000L) + t.tv_nsec + ns_until_deadline + */ +struct sync_set_deadline { + __u64 deadline_ns; + /* Not strictly needed for alignment but gives some possibility + * for future extension: + */ + __u64 pad; +}; + #define SYNC_IOC_MAGIC '>' /* @@ -87,5 +108,6 @@ struct sync_file_info { #define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data) #define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info) +#define SYNC_IOC_SET_DEADLINE _IOW(SYNC_IOC_MAGIC, 5, struct sync_set_deadline) #endif /* _UAPI_LINUX_SYNC_H */