From patchwork Wed Mar 8 15:52:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 13166031 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 104A8C64EC4 for ; Wed, 8 Mar 2023 15:54:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4E6E710E636; Wed, 8 Mar 2023 15:53:47 +0000 (UTC) Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by gabe.freedesktop.org (Postfix) with ESMTPS id A23C410E636; Wed, 8 Mar 2023 15:53:42 +0000 (UTC) Received: by mail-pl1-x629.google.com with SMTP id y11so18102969plg.1; Wed, 08 Mar 2023 07:53:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678290822; 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=4y5b+VjWsIZ7/aQ28FJAoXhXCRI/6ay8CYDf5UDrIsQ=; b=Qgty6JemmqndPzrOvTFjpdZYq4HTDRC1Nb/6xQ9mwOXXVtHYWblss0rZOXOun+0brb Vn0VmVgiIHeYoANUhgQneDplGRLe/AEM8ojrFvDAhScrvRUu2RNv1ewj/sRzCcWDeKCS LXeDrQzld7Y3CdcYFPQv6Dg02+FAgWqYzNO/JlsBqPvAQGP1eiMDM5kWekKp+ikzSBlJ RrpAMk86oSm9njXvxu4e4i58S06IwH+lg5lWOovDQRj/dLi+Hq6NGWki5mO3eDwlLD1z e0J19KOhAleiZWrrGMWpUk62X8VmJj21NldYbcCgixQ/aXm5mKLM/9tKWEDZugaqhZ1G Fagg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678290822; 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=4y5b+VjWsIZ7/aQ28FJAoXhXCRI/6ay8CYDf5UDrIsQ=; b=s9wjOn1s3KnNRGiMBFbxws2rke/rf6vslzjZNk8wdw3KE71hkmkOn/dUimJ+mE3jF9 h/jWApF1l7E8jozEN/eDbNHFpZ9lpppBBr2YzgAvDTpVbSUgcec/vYRwDASfZsklNQkC XxaQusksMOA4n1ObKjFE0DZ40qQDyDqH9gueMBShkBaNVc9QK/xX0SMFSkXIVE0zlXPA TlOzvSIhwR464Qm7V7uORQ+69D6Cd0N0Ura2a9UXTQC9B8gRuWbgrIsjoqLhKNN/NVB8 WcK39lpnRO1Rd6PQPbJUzY+AJAi+E/x/wBo3qjkhyQOJyhWw5ZjVv1TccUEY1bMXGqeB gJ8Q== X-Gm-Message-State: AO0yUKXgKQHJwdar7/Fy+vgkv6yg3P9jYckmmCmtQhQxN1LhIv5CUBD1 2iMovwAzrWbERniL+W2x4AVjzapVDjw= X-Google-Smtp-Source: AK7set+slEwuyhiM7J+t4oZEWiZ6d/QJzILZsLHwV9a8j3akEhhWZmIVSvWagsgajmw3hvccg7AyNQ== X-Received: by 2002:a17:90b:3a82:b0:237:c5cc:15bf with SMTP id om2-20020a17090b3a8200b00237c5cc15bfmr18947277pjb.13.1678290821736; Wed, 08 Mar 2023 07:53:41 -0800 (PST) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id h9-20020a17090acf0900b00219752c8ea5sm8987481pju.37.2023.03.08.07.53.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Mar 2023 07:53:41 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Subject: [PATCH v10 06/15] dma-buf/sync_file: Add SET_DEADLINE ioctl Date: Wed, 8 Mar 2023 07:52:57 -0800 Message-Id: <20230308155322.344664-7-robdclark@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230308155322.344664-1-robdclark@gmail.com> References: <20230308155322.344664-1-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 , Pekka Paalanen , =?utf-8?q?Christian_K=C3=B6n?= =?utf-8?q?ig?= , intel-gfx@lists.freedesktop.org, open list , =?utf-8?q?Christian_K=C3=B6nig?= , "moderated list:DMA BUFFER SHARING FRAMEWORK" , Luben Tuikov , Rodrigo Vivi , Gustavo Padovan , Matt Turner , 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 */