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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1677FE7716E for ; Wed, 4 Dec 2024 15:33:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jsv4DyFtp2uJhVyt+kJ1zSZIlddKaM2KbUrSxNXbbHM=; b=BleVNkCkTwRgGNNJtzY6m6ZpjE +KXfwxaAraWiI7bft1fJP2+EcZeq/J5ZzLwl7W5xdf0GfqYmGwk+7TSw+K2Tv21yDYopnVYdtv7Pw I1FL8A4GzEayzVsuqFc+MTi7e1ZZxiu1pmatMSiK6Jg3FLSqHgAJDadpxt9QS8JezPuUaCsAMYMUy jUgj5Y9NvFnz4Bbes8SIiXsqRYl4lUXxHx8qIZ94pvrLlCxdbJNRT761KqrnuBmaZ1OuWM9HRHq8G z/g59CJ02OleLCVuodIM+PGbC16ayc30zAGOALu7mpr2W/WeFxtjK3EJGlNS2eM+UEfV0Qn5LgXev xytuSOHw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tIrNh-0000000D0xn-1WIf; Wed, 04 Dec 2024 15:33:37 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tIrLA-0000000D0Qj-2P9G for linux-arm-kernel@lists.infradead.org; Wed, 04 Dec 2024 15:31:01 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=jsv4DyFtp2uJhVyt+kJ1zSZIlddKaM2KbUrSxNXbbHM=; b=VhmVb4Z+UIhP450eSpi9XGP++L WHF1/2i0fXq701JVCHs3Q+7euJhCmkavJGAbcDQz2WP5gPFxCS6LsCKH1i2OYSynf9YRSLmiUVGZA AXDjXFdw2S5FuBxISyP/pNPkWgBm+ejlyNpY3EFiPsZi2pSWulRodEh2sCY5zhmIiY+B0vAJEK/HE odzhogCgy/waj8VXZBX21s5wGFiaJE/eqtj/UUHhA8ZdJM5tOT9ohuUPQ/NX68FFtIb5tQTrqmaGp IYbqXKlE1Jk8Fkqzu1d9gdeUrc0b/ytKpvlYFSFuHLZE9hwBfMn6zXcKcKCU+C6VBBmOArIzMwWLO c18FROEg==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:47318) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tIrL3-0003Vq-1L; Wed, 04 Dec 2024 15:30:53 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.96) (envelope-from ) id 1tIrL1-0005dy-39; Wed, 04 Dec 2024 15:30:51 +0000 Date: Wed, 4 Dec 2024 15:30:51 +0000 From: "Russell King (Oracle)" To: Linus Walleij Cc: Arnd Bergmann , Marc Zyngier , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Arnd Bergmann , Aaro Koskinen , Andrew Lunn , Ard Biesheuvel , Daniel Mack , Gregory Clement , Haojian Zhuang , "Jeremy J. Peper" , Kristoffer Ericson , Krzysztof Kozlowski , Mark Brown , Ralph Siemsen , Robert Jarzmik , Sebastian Hesselbarth , Tony Lindgren , Christoph Hellwig Subject: Re: [PATCH 15/15] ARM: mark footbridge as deprecated Message-ID: References: <20241204102904.1863796-1-arnd@kernel.org> <20241204102904.1863796-16-arnd@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241204_073100_609924_E2FDD378 X-CRM114-Status: GOOD ( 25.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Dec 04, 2024 at 04:14:07PM +0100, Linus Walleij wrote: > On Wed, Dec 4, 2024 at 3:37 PM Russell King (Oracle) > wrote: > > > > I am booting it occasionally, last time to test my KCFI patches. > > > But admittedly that is only to test it for other SA110 users. I remember > > > that Christoph had problems consolidating the DMA used in this > > > machine as well so it is standing in the way of useful work. > > > > What problems with DMA? The fact that it uses an offset between > > physical and PCI bus space should be nothing that causes a problem > > for the kernel. As maintainer for Footbridge, I've heard nothing > > about there being any issue. > > No issue other than testing and iterating the patches I think. > > I was thinking of this patchset to do dma_direct_set_offset(): > https://lore.kernel.org/linux-arm-kernel/20200917173229.3311382-3-hch@lst.de/ > > It seems to have stalled some years ago, but maybe there was > some other reason. > > IIRC Christoph was onto me to test it on the NetWinder, but I > couldn't locate a good DMA capable device to test it with. > (Would be the soundblaster but then I needed some userspace...) It isn't soundblaster, but waveartist, and needs special setup to be functional (which was all in my OSS waveartist driver.) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!