From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S932697AbeARPXg (ORCPT <rfc822;w@1wt.eu>);
        Thu, 18 Jan 2018 10:23:36 -0500
Received: from verein.lst.de ([213.95.11.211]:34567 "EHLO newverein.lst.de"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S932679AbeARPXd (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 18 Jan 2018 10:23:33 -0500
Date: Thu, 18 Jan 2018 16:23:31 +0100
From: Christoph Hellwig <hch@lst.de>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>, Rob Herring <robh+dt@kernel.org>,
        Jim Quinlan <jim2101024@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Brian Norris <computersforpeace@gmail.com>,
        Russell King <rmk+kernel@armlinux.org.uk>,
        Robin Murphy <robin.murphy@arm.com>,
        Jonas Gorski <jonas.gorski@gmail.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
        <devicetree@vger.kernel.org>,
        Linux-MIPS <linux-mips@linux-mips.org>, linux-pci@vger.kernel.org,
        Kevin Cernekee <cernekee@gmail.com>,
        Ralf Baechle <ralf@linux-mips.org>,
        bcm-kernel-feedback-list@broadcom.com,
        Gregory Fong <gregory.0xf0@gmail.com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
        <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 4/8] PCI: brcmstb: Add dma-range mapping for inbound
        traffic
Message-ID: <20180118152331.GA24461@lst.de>
References: <1516058925-46522-1-git-send-email-jim2101024@gmail.com> <1516058925-46522-5-git-send-email-jim2101024@gmail.com> <CAL_JsqKpWNJXNpKS5qC99N0+H_P37DcRE-rN9HFwT5tVmRFCNw@mail.gmail.com> <20180118073123.GA15766@lst.de> <EDAEFB0F-BB7C-444A-B282-F178F5ADFCBF@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <EDAEFB0F-BB7C-444A-B282-F178F5ADFCBF@gmail.com>
User-Agent: Mutt/1.5.17 (2007-11-01)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, Jan 18, 2018 at 07:09:23AM -0800, Florian Fainelli wrote:
> >But in this case it actually is the example to follow as told
> >previously.
> >
> >NAK again for these chained dma ops that only create problems.
> 
> Care to explain what should be done instead?

Override phys_to_dma and dma_to_phys as mips and x86 do for similar
situations.

Bonous points of finding some generic way of doing it instead of
hiding it in arch code.