From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36836C55186 for ; Fri, 24 Apr 2020 09:30:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1369520736 for ; Fri, 24 Apr 2020 09:30:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EwqLXlZw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726896AbgDXJaw (ORCPT ); Fri, 24 Apr 2020 05:30:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726523AbgDXJaw (ORCPT ); Fri, 24 Apr 2020 05:30:52 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18119C09B045; Fri, 24 Apr 2020 02:30:52 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id o15so4389061pgi.1; Fri, 24 Apr 2020 02:30:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=41prVte/MxVN8rT+cmjF7KZHxVdpTKw2jaomXqXMCyU=; b=EwqLXlZwJ+cCoRK6cJZ9gMIiWoiv5nANq3T7n4A0Dp4PBDjB9xl8NutCDZiCWuMPnx AU2uod83uEjFBObvGTws8ymzhvSanj4dR1by6f4omlVTUsWhUADseUUlnObLQ8sFma8p +Hdf9gQ0ZRBkMLIyz1FZijOm8kvqAIJioBd6hhKGuo+YmYBbn5y2+KOsn4saHUewBTy1 ODxDfu6stREZqDlvVIXFxITanQV1vD6m+jUePrcuA5vlnVVa6+zod30ZHpwC8XjXDuGK xieyCvxTgqs61nXbd7Xs0AHLkUezBBq5UB8yyBlGwQ54Lz6WdoYNnE19P9sxD3NTOaP4 Mywg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=41prVte/MxVN8rT+cmjF7KZHxVdpTKw2jaomXqXMCyU=; b=t6RM+VYlHJUIapJ9GwZY2WTHA16ILPNIaf+dHkDqgoE9f2esWNvesP1tZ0piuvrTIj paIB8YSY1yXDCcZOpGi1RBY/oPD+ydpmeG/zhSUTGESnbqoMKBgmORNneIVVlts8koL0 /7b3T4/MNbqwRM/7+5qlh/E1a7h4JHFqVf0z3Qy8vFj3wbpeHz82Qti7EQcwMcKcnS2M Ch7+OS7p2LZi2HNmr0U/9Hjb2CGLAtw8wmWTNra6Whue8KVGljR1sAql9oDzAy5+yMzD udnFzjTwRsxEQ9Ww2r5PqVqMw3mTrp6p69F9Fd9pl2nJgpO685L8Q3eZsSoefiBepbu/ Ra6A== X-Gm-Message-State: AGi0PuYN30xirivk6yWOprmFeeRmpWHcTaSUSPU2ylR3lWRZzqoZzPlG iLChRFsFXylNNH8v12JDpC0= X-Google-Smtp-Source: APiQypKjkmfsFU9zHxc2sJsKL/YOujcpzgmhfTVNZK+x4JRN0bv9h3ueUQ6EoXadQiBn8XLnF/eMfQ== X-Received: by 2002:a62:1801:: with SMTP id 1mr8741392pfy.230.1587720651578; Fri, 24 Apr 2020 02:30:51 -0700 (PDT) Received: from localhost.localdomain (146.85.30.125.dy.iij4u.or.jp. [125.30.85.146]) by smtp.gmail.com with ESMTPSA id 185sm5541315pfv.9.2020.04.24.02.30.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Apr 2020 02:30:51 -0700 (PDT) From: Sergey Senozhatsky To: Hans Verkuil Cc: Mauro Carvalho Chehab , Tomasz Figa , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky , Sergey Senozhatsky Subject: [PATCHv5 03/13] videobuf2: handle V4L2 buffer cache flags Date: Fri, 24 Apr 2020 18:29:10 +0900 Message-Id: <20200424092920.4801-4-sergey.senozhatsky@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200424092920.4801-1-sergey.senozhatsky@gmail.com> References: <20200424092920.4801-1-sergey.senozhatsky@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Sergey Senozhatsky Set video buffer cache management flags corresponding to V4L2 cache flags. Both ->prepare() and ->finish() cache management hints should be passed during this stage (buffer preparation), because there is no other way for user-space to tell V4L2 to avoid ->finish() cache flush. Signed-off-by: Sergey Senozhatsky --- .../media/common/videobuf2/videobuf2-v4l2.c | 48 +++++++++++++++++++ include/media/videobuf2-core.h | 11 +++++ 2 files changed, 59 insertions(+) diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index eb5d5db96552..f13851212cc8 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -337,6 +337,53 @@ static int vb2_fill_vb2_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b return 0; } +static void set_buffer_cache_hints(struct vb2_queue *q, + struct vb2_buffer *vb, + struct v4l2_buffer *b) +{ + /* + * DMA exporter should take care of cache syncs, so we can avoid + * explicit ->prepare()/->finish() syncs. For other ->memory types + * we always need ->prepare() or/and ->finish() cache sync. + */ + if (q->memory == VB2_MEMORY_DMABUF) { + vb->need_cache_sync_on_finish = 0; + vb->need_cache_sync_on_prepare = 0; + return; + } + + /* + * Cache sync/invalidation flags are set by default in order to + * preserve existing behaviour for old apps/drivers. + */ + vb->need_cache_sync_on_prepare = 1; + vb->need_cache_sync_on_finish = 1; + + if (!vb2_queue_allows_cache_hints(q)) { + /* + * Clear buffer cache flags if queue does not support user + * space hints. That's to indicate to userspace that these + * flags won't work. + */ + b->flags &= ~V4L2_BUF_FLAG_NO_CACHE_INVALIDATE; + b->flags &= ~V4L2_BUF_FLAG_NO_CACHE_CLEAN; + return; + } + + /* + * ->finish() cache sync can be avoided when queue direction is + * TO_DEVICE. + */ + if (q->dma_dir == DMA_TO_DEVICE) + vb->need_cache_sync_on_finish = 0; + + if (b->flags & V4L2_BUF_FLAG_NO_CACHE_INVALIDATE) + vb->need_cache_sync_on_finish = 0; + + if (b->flags & V4L2_BUF_FLAG_NO_CACHE_CLEAN) + vb->need_cache_sync_on_prepare = 0; +} + static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *mdev, struct v4l2_buffer *b, bool is_prepare, struct media_request **p_req) @@ -381,6 +428,7 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md } if (!vb->prepared) { + set_buffer_cache_hints(q, vb, b); /* Copy relevant information provided by the userspace */ memset(vbuf->planes, 0, sizeof(vbuf->planes[0]) * vb->num_planes); diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 7f39d9fffc8c..ccc5c498d3e3 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -635,6 +635,17 @@ struct vb2_queue { #endif }; +/** + * vb2_queue_allows_cache_hints() - Return true if the queue allows cache + * and memory consistency hints. + * + * @q: pointer to &struct vb2_queue with videobuf2 queue + */ +static inline bool vb2_queue_allows_cache_hints(struct vb2_queue *q) +{ + return q->allow_cache_hints && q->memory == VB2_MEMORY_MMAP; +} + /** * vb2_plane_vaddr() - Return a kernel virtual address of a given plane. * @vb: pointer to &struct vb2_buffer to which the plane in -- 2.26.2