From patchwork Thu Jul 15 09:24:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dillon Min X-Patchwork-Id: 12379563 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,USER_AGENT_GIT autolearn=unavailable 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 62F51C47E51 for ; Thu, 15 Jul 2021 09:25:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C7D76115B for ; Thu, 15 Jul 2021 09:25:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240873AbhGOJ14 (ORCPT ); Thu, 15 Jul 2021 05:27:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240821AbhGOJ14 (ORCPT ); Thu, 15 Jul 2021 05:27:56 -0400 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4BCBAC06175F; Thu, 15 Jul 2021 02:25:02 -0700 (PDT) Received: by mail-pj1-x1036.google.com with SMTP id p4-20020a17090a9304b029016f3020d867so3632658pjo.3; Thu, 15 Jul 2021 02:25:02 -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; bh=m/Lq62zQC/ZLuIP1g6AP3azBlb4BnAyoWJG0y535CEU=; b=J7cItZOotGPgGmmK3Y9GaDICloT+uDY53d8YNYj4g21KU/W9x3BW3SZp2xlckotbYX xS+BKjzuqrQ/s1SHJ3m/bJQhL/O0dXy7UOy0fZ5FohGsPPM88vNW5pGoJrGXRj9YGYvK PPPRm49uhRlsSF3n4iX+XRD1+WhxfjhE4SQ8aeZGw+XrmNotuDNT/yDOv6WIr2HvDhzF l3405DRTQX3F5HLDxthiPZd6Wq2B6JPoy80LT2dIDGn9Vohbi7iGrYt/CYKA3Lp9QuUO a24bkc+nhcqIrLiRARkicNlo8drKNI+ipujBuMEvz6mLV1Q8kQ7+VaFP4coYz8Se8jb2 Hn9A== 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; bh=m/Lq62zQC/ZLuIP1g6AP3azBlb4BnAyoWJG0y535CEU=; b=CM4EKbqDTQ47lF/mQuKc2L6xsgQOcVZB9YaK4z9qNMr8qoNPPdTB48yzgrdsuDLzat VKaLJPQBo01StahYKJndDyUvCKhkJAmA0gnH2vCfAGCNC9HDvi9Xn1sNMfo4MqDAgR6n TleMVI0HNZHnJYNftp1qzDE4aZqWuCKMJSULfRTl1ycQMDVXZp5hzG7ny+3qw1MSSuJR TY0lkb2OwbjLmpcfCzxC4V3ZLekVVZ5vFV/yaUPp+zBF9H9NmQpdqG227EEJu7797JLK QhLeCh0ObawBoQ94QyGvqJWFlk9J9FQ+4nz41NV9PqCqs1izBaNFQuvfqamms0zeb/N5 oCMw== X-Gm-Message-State: AOAM533Yvfy1MgEnbrc/37EupDjDpyNEfmqCzRU2WM1K1TTx5srrlsKq SZmmWeDNQmF6dCnMe9nfss4= X-Google-Smtp-Source: ABdhPJyPuJI9bZEcwxu44fd7Z6mp4RPeVnQZBW1wXqAe6/Wh6mLtCCZSEi5VlAoDZVLDOoyAHbtH/w== X-Received: by 2002:a17:90a:6d63:: with SMTP id z90mr3488583pjj.177.1626341101943; Thu, 15 Jul 2021 02:25:01 -0700 (PDT) Received: from fmin-OptiPlex-7060.nreal.work ([137.59.103.165]) by smtp.gmail.com with ESMTPSA id 11sm6662503pge.7.2021.07.15.02.24.57 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Jul 2021 02:25:01 -0700 (PDT) From: dillon.minfei@gmail.com To: mchehab@kernel.org, mchehab+huawei@kernel.org, hverkuil-cisco@xs4all.nl, ezequiel@collabora.com, gnurou@gmail.com, pihsun@chromium.org, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com, mturquette@baylibre.com, sboyd@kernel.org, robh+dt@kernel.org Cc: patrice.chotard@foss.st.com, hugues.fruchet@foss.st.com, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, Dillon Min Subject: [PATCH v2 6/9] media: v4l2-mem2mem: add v4l2_m2m_get_unmapped_area for no-mmu platform Date: Thu, 15 Jul 2021 17:24:15 +0800 Message-Id: <1626341068-20253-7-git-send-email-dillon.minfei@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1626341068-20253-1-git-send-email-dillon.minfei@gmail.com> References: <1626341068-20253-1-git-send-email-dillon.minfei@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Dillon Min For platforms without MMU the m2m provides a helper method v4l2_m2m_get_unmapped_area(), The mmap() routines will call this to get a proposed address for the mapping. More detailed information about get_unmapped_area can be found in Documentation/nommu-mmap.txt Signed-off-by: Dillon Min --- v2: fix the warrnings from checkpatch.pl --strict, thanks Hans drivers/media/v4l2-core/v4l2-mem2mem.c | 21 +++++++++++++++++++++ include/media/v4l2-mem2mem.h | 5 +++++ 2 files changed, 26 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c index e7f4bf5bc8dd..e2654b422334 100644 --- a/drivers/media/v4l2-core/v4l2-mem2mem.c +++ b/drivers/media/v4l2-core/v4l2-mem2mem.c @@ -966,6 +966,27 @@ int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, } EXPORT_SYMBOL(v4l2_m2m_mmap); +#ifndef CONFIG_MMU +unsigned long v4l2_m2m_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + struct v4l2_fh *fh = file->private_data; + unsigned long offset = pgoff << PAGE_SHIFT; + struct vb2_queue *vq; + + if (offset < DST_QUEUE_OFF_BASE) { + vq = v4l2_m2m_get_src_vq(fh->m2m_ctx); + } else { + vq = v4l2_m2m_get_dst_vq(fh->m2m_ctx); + pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT); + } + + return vb2_get_unmapped_area(vq, addr, len, pgoff, flags); +} +EXPORT_SYMBOL_GPL(v4l2_m2m_get_unmapped_area); +#endif + #if defined(CONFIG_MEDIA_CONTROLLER) void v4l2_m2m_unregister_media_controller(struct v4l2_m2m_dev *m2m_dev) { diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h index 5a91b548ecc0..fdbd5257e020 100644 --- a/include/media/v4l2-mem2mem.h +++ b/include/media/v4l2-mem2mem.h @@ -495,6 +495,11 @@ __poll_t v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct vm_area_struct *vma); +#ifndef CONFIG_MMU +unsigned long v4l2_m2m_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); +#endif /** * v4l2_m2m_init() - initialize per-driver m2m data *