Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp3088672pxb;
        Mon, 1 Mar 2021 00:59:11 -0800 (PST)
X-Google-Smtp-Source: ABdhPJwL5pKpyYhSu5tRDYjFnSNGQgT/bCBCQXl4Mzb/1qgSznfjuVOuA8/ygWYseK42xzAvXO2x
X-Received: by 2002:a17:906:5044:: with SMTP id e4mr14813277ejk.445.1614589151496;
        Mon, 01 Mar 2021 00:59:11 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1614589151; cv=none;
        d=google.com; s=arc-20160816;
        b=T0uCnlnqDcYEDDzRyAg6+zUJi9F44n4ZuOn2hchM/z0HmHorsf8NXAaI2/bSlm7F6E
         u0oO1zhDI3upqTxjjNWtik59T06Qo+RtqhvuJNqyRBl4dN8aQPitRGs7LBo31YMNSs2l
         gQNajEVpm2BB+IfPt/osS1/PMJC5N87N9NK4doMvSh36O4iNJ47OLOPBRRUkEukyRFSO
         LU7Ydu63ayVbeT9gB87mbpJmPv3Grz6GfYHrYXvr7vfYgsPJxsOJLik0X1SndInKI18m
         ZySnulSIykSkJP5nTFNUq6xdt50rjNOINnTZq5B5yZw4L8AK35jfzfnD6yVDFP5f7WXM
         NKnw==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:content-transfer-encoding:mime-version
         :message-id:date:subject:cc:to:from:dkim-signature;
        bh=/y/IlBQLfgNT2S5nwStuxp6zBAlsDLYSfzk0/A7qRR4=;
        b=YLD70SsBrfYRTcAjdJO34dJ/ZoOVWYYfC4tXNgqCeFtGJkWnNBMhZDFS8/S6vb38dG
         TI4AqKXo35IdZIAogTTXuEUgmEI6ZMvwADON0yyzv0xBqaR8CXtjxMhkrhwND355iOcP
         baQsyJLsv8+0AO8ZJvU7ob/8wgz/FwCeEqnJPO3ssYlrpPM8ZK5SHvX69BvKLWg2qoU8
         HCHnnbL6kaREAMGZVUnyNlh2eCR1l3ZtHjSNRm/VP1qcUbO+UBUCphY5e0Zi5OdPmFIh
         3pIHv6IcGXcUxriWtcVE1lE1fi5fs944LCKhIj7GpAO51gvt1OSP+JqTsZsaUobFeKr9
         EikA==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=Crdvh+f2;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18])
        by mx.google.com with ESMTP id u3si8317237ejj.14.2021.03.01.00.58.49;
        Mon, 01 Mar 2021 00:59:11 -0800 (PST)
Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=Crdvh+f2;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S233563AbhCAI4f (ORCPT <rfc822;luc.vanoostenryck.ml@gmail.com>
        + 99 others); Mon, 1 Mar 2021 03:56:35 -0500
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51830 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S233361AbhCAIyN (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 1 Mar 2021 03:54:13 -0500
Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2018C061788;
        Mon,  1 Mar 2021 00:53:32 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
        d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version:
        Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:
        Content-Description:In-Reply-To:References;
        bh=/y/IlBQLfgNT2S5nwStuxp6zBAlsDLYSfzk0/A7qRR4=; b=Crdvh+f2fbEBfXNlDsCHXyvPlT
        ZJcLBYUP+YsUw5+jCgIBYF6lr4RM4lJM81MK9aO/Gol4awhfP1xAFbDp6BRnKeTy4IvssYipAfBfC
        XO4SuKTVOuh4YcPbZMtdlHZdQ3pfPctiEBcvi8DpX0q4CAuTxl1F9pmZ576OR0uGXZ3te2UV8EwBg
        xhy5wrLGTyBla/QqmY1OuFbiH7iSNTzg41D5bk2t/TuwzDHwMofcPhuuw9AUm0LQSxNSjugMo8oTk
        heHmY957JH5sFQD3eYzBlIYiBzmqEuTySCwmRkDhWM1YzdzFIcgMGSDP9mZldpull582kMY1ZVF0D
        /+TREJqg==;
Received: from [2001:4bb8:19b:e4b7:cdf9:733f:4874:8eb4] (helo=localhost)
        by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux))
        id 1lGeI9-00FVFN-3I; Mon, 01 Mar 2021 08:52:41 +0000
From:   Christoph Hellwig <hch@lst.de>
To:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Tomasz Figa <tfiga@chromium.org>,
        Ricardo Ribalda <ribalda@chromium.org>,
        Sergey Senozhatsky <senozhatsky@google.com>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        iommu@lists.linux-foundation.org
Cc:     Robin Murphy <robin.murphy@arm.com>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org
Subject: add a new dma_alloc_noncontiguous API v3
Date:   Mon,  1 Mar 2021 09:52:30 +0100
Message-Id: <20210301085236.947011-1-hch@lst.de>
X-Mailer: git-send-email 2.29.2
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by casper.infradead.org. See http://www.infradead.org/rpr.html
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi all,

this series adds the new noncontiguous DMA allocation API requested by
various media driver maintainers.

Changes since v2:
 - rebased to Linux 5.12-rc1
 - dropped one already merged patch
 - pass an attrs argument to dma_alloc_noncontigous
 - clarify the dma_vmap_noncontiguous documentation a bit
 - fix double assignments in uvcvideo

Changes since v1:
 - document that flush_kernel_vmap_range and invalidate_kernel_vmap_range
   must be called once an allocation is mapped into KVA
 - add dma-debug support
 - remove the separate dma_handle argument, and instead create fully formed
   DMA mapped scatterlists
 - use a directional allocation in uvcvideo
 - call invalidate_kernel_vmap_range from uvcvideo