From patchwork Tue Feb 28 22:58:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 657996 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C75BFC64EC7 for ; Tue, 28 Feb 2023 22:59:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229854AbjB1W7a (ORCPT ); Tue, 28 Feb 2023 17:59:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52588 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229933AbjB1W7J (ORCPT ); Tue, 28 Feb 2023 17:59:09 -0500 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6796B37B41; Tue, 28 Feb 2023 14:58:55 -0800 (PST) Received: by mail-pj1-x1034.google.com with SMTP id m8-20020a17090a4d8800b002377bced051so15349570pjh.0; Tue, 28 Feb 2023 14:58:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1677625134; 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=21wqp+C7HZHRRzK2Q4IDwv/lm2tgOWbmveQ4Lk1OTfI=; b=KzkcOAyQvNNU7szJXv8CAcca5rjivOrXlu/UuIz2cp3yidIMsrQq2OgdIOIE5i9WPT 6YW4slITMjN+lTV3pjgl5L+wD3PuzUhsjy4igRJ1WmxSwEnpJmwXCzvjm+oJ+mVWKwXm WmTu5T2zdpc/+61kVmgWuroqz0mTaJ7ixF6MBXN1vujFst05o2Dd65U4KpVEEbOxIKP0 lllmfVs1rVdkxys+ApjfLuCbmKrM8ULLuX9MIBMRJrsFOYH+m4tobA83pQzj5xlRazuu Ot20HKgWqiIwytkZ9hcFPGQyoK+vQHF6WfhpG6jvp6ArlY/63pis5VAEj/UZxFGYWdnz s3Ew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1677625134; 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=21wqp+C7HZHRRzK2Q4IDwv/lm2tgOWbmveQ4Lk1OTfI=; b=28BlX6snzolftX7vuqyTJohVDEJWrQYtZxTor3whXSaUdE2nfUGDmFdIDUgeS5ZQKP 8bBGGcm4gEOE4Kqxu+65xpEQbvJHHYP/4NCBw1feTgCBrqsPYpSa7XWFnNXCbN7H+4+2 nlzmyb5hOqyDoX00/AlJjVqcB4ckoNlsTKIZ08BAtYLTUOpmLVF0mvjuLrImSQK9eF4N ATvBFU98IwDyC2K1aewXtMv/TAhO+bc5XeSJ+7oyDtRf0kKKSWtbVNsT0fbAeMZXn3Qs xHRO/lZqJ8sNCXn4NtkbC1lFhPGQrkGnQZL9YgWy81dNDr0LeLym/234RCYXetZoLRLR K+ag== X-Gm-Message-State: AO0yUKVVFugeokADFZDtLcSEZTdIqDsYPjHZRb4t/rHrXhmVrimQ56nQ pfpFKz3a58UeJE1fhPVs6Rs= X-Google-Smtp-Source: AK7set+51zjpNyhSC6+ei9dCISIppOAw4ol3FMnAd/2mI0rStZPjQ4M6t4Ur3q0GAkIMjbRp5nIzGw== X-Received: by 2002:a17:902:c948:b0:19c:dd49:9bf8 with SMTP id i8-20020a170902c94800b0019cdd499bf8mr15692768pla.28.1677625134605; Tue, 28 Feb 2023 14:58:54 -0800 (PST) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id jn9-20020a170903050900b00189ac5a2340sm7000134plb.124.2023.02.28.14.58.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Feb 2023 14:58:54 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, Daniel Vetter , =?utf-8?q?Christian_K=C3=B6nig?= , =?utf-8?q?Michel_D=C3=A4nzer?= , Tvrtko Ursulin , Rodrigo Vivi , Alex Deucher , Pekka Paalanen , Simon Ser , Luben Tuikov , Rob Clark , =?utf-8?q?Christian_K=C3=B6nig?= , Sumit Semwal , Gustavo Padovan , linux-media@vger.kernel.org (open list:SYNC FILE FRAMEWORK), linaro-mm-sig@lists.linaro.org (moderated list:DMA BUFFER SHARING FRAMEWORK), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v8 08/16] dma-buf/sw_sync: Add fence deadline support Date: Tue, 28 Feb 2023 14:58:12 -0800 Message-Id: <20230228225833.2920879-9-robdclark@gmail.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230228225833.2920879-1-robdclark@gmail.com> References: <20230228225833.2920879-1-robdclark@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Rob Clark This consists of simply storing the most recent deadline, and adding an ioctl to retrieve the deadline. This can be used in conjunction with the SET_DEADLINE ioctl on a fence fd for testing. Ie. create various sw_sync fences, merge them into a fence-array, set deadline on the fence-array and confirm that it is propagated properly to each fence. v2: Switch UABI to express deadline as u64 v3: More verbose UAPI docs, show how to convert from timespec v4: Better comments, track the soonest deadline, as a normal fence implementation would, return an error if no deadline set. Signed-off-by: Rob Clark Reviewed-by: Christian König --- drivers/dma-buf/sw_sync.c | 81 ++++++++++++++++++++++++++++++++++++ drivers/dma-buf/sync_debug.h | 2 + 2 files changed, 83 insertions(+) diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c index 348b3a9170fa..f53071bca3af 100644 --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -52,12 +52,33 @@ struct sw_sync_create_fence_data { __s32 fence; /* fd of new fence */ }; +/** + * struct sw_sync_get_deadline - get the deadline hint of a sw_sync fence + * @deadline_ns: absolute time of the deadline + * @pad: must be zero + * @fence_fd: the sw_sync fence fd (in) + * + * Return the earliest deadline set on the fence. The timebase for the + * deadline is CLOCK_MONOTONIC (same as vblank). If there is no deadline + * set on the fence, this ioctl will return -ENOENT. + */ +struct sw_sync_get_deadline { + __u64 deadline_ns; + __u32 pad; + __s32 fence_fd; +}; + #define SW_SYNC_IOC_MAGIC 'W' #define SW_SYNC_IOC_CREATE_FENCE _IOWR(SW_SYNC_IOC_MAGIC, 0,\ struct sw_sync_create_fence_data) #define SW_SYNC_IOC_INC _IOW(SW_SYNC_IOC_MAGIC, 1, __u32) +#define SW_SYNC_GET_DEADLINE _IOWR(SW_SYNC_IOC_MAGIC, 2, \ + struct sw_sync_get_deadline) + + +#define SW_SYNC_HAS_DEADLINE_BIT DMA_FENCE_FLAG_USER_BITS static const struct dma_fence_ops timeline_fence_ops; @@ -171,6 +192,22 @@ static void timeline_fence_timeline_value_str(struct dma_fence *fence, snprintf(str, size, "%d", parent->value); } +static void timeline_fence_set_deadline(struct dma_fence *fence, ktime_t deadline) +{ + struct sync_pt *pt = dma_fence_to_sync_pt(fence); + unsigned long flags; + + spin_lock_irqsave(fence->lock, flags); + if (test_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags)) { + if (ktime_before(deadline, pt->deadline)) + pt->deadline = deadline; + } else { + pt->deadline = deadline; + set_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags); + } + spin_unlock_irqrestore(fence->lock, flags); +} + static const struct dma_fence_ops timeline_fence_ops = { .get_driver_name = timeline_fence_get_driver_name, .get_timeline_name = timeline_fence_get_timeline_name, @@ -179,6 +216,7 @@ static const struct dma_fence_ops timeline_fence_ops = { .release = timeline_fence_release, .fence_value_str = timeline_fence_value_str, .timeline_value_str = timeline_fence_timeline_value_str, + .set_deadline = timeline_fence_set_deadline, }; /** @@ -387,6 +425,46 @@ static long sw_sync_ioctl_inc(struct sync_timeline *obj, unsigned long arg) return 0; } +static int sw_sync_ioctl_get_deadline(struct sync_timeline *obj, unsigned long arg) +{ + struct sw_sync_get_deadline data; + struct dma_fence *fence; + struct sync_pt *pt; + int ret = 0; + + if (copy_from_user(&data, (void __user *)arg, sizeof(data))) + return -EFAULT; + + if (data.deadline_ns || data.pad) + return -EINVAL; + + fence = sync_file_get_fence(data.fence_fd); + if (!fence) + return -EINVAL; + + pt = dma_fence_to_sync_pt(fence); + if (!pt) + return -EINVAL; + + spin_lock(fence->lock); + if (test_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags)) { + data.deadline_ns = ktime_to_ns(pt->deadline); + } else { + ret = -ENOENT; + } + spin_unlock(fence->lock); + + dma_fence_put(fence); + + if (ret) + return ret; + + if (copy_to_user((void __user *)arg, &data, sizeof(data))) + return -EFAULT; + + return 0; +} + static long sw_sync_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -399,6 +477,9 @@ static long sw_sync_ioctl(struct file *file, unsigned int cmd, case SW_SYNC_IOC_INC: return sw_sync_ioctl_inc(obj, arg); + case SW_SYNC_GET_DEADLINE: + return sw_sync_ioctl_get_deadline(obj, arg); + default: return -ENOTTY; } diff --git a/drivers/dma-buf/sync_debug.h b/drivers/dma-buf/sync_debug.h index 6176e52ba2d7..2e0146d0bdbb 100644 --- a/drivers/dma-buf/sync_debug.h +++ b/drivers/dma-buf/sync_debug.h @@ -55,11 +55,13 @@ static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence) * @base: base fence object * @link: link on the sync timeline's list * @node: node in the sync timeline's tree + * @deadline: the most recently set fence deadline */ struct sync_pt { struct dma_fence base; struct list_head link; struct rb_node node; + ktime_t deadline; }; extern const struct file_operations sw_sync_debugfs_fops;