From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00B361B4124 for ; Wed, 4 Dec 2024 15:30:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733326260; cv=none; b=IAtcIBTXhLZCM20J6yzGTIFNSGVcW2250VycXjRkwzSuIBmqG5qMAY+JnGyDfAcgS/Pbk18Ok3eA60bRas/+v0jQpb+YWy74oldjOKDFvg18MR9NpheRimZIV9R/I3qx8KrkYLHQD+JuH5RTttkI3dK4X1Onvkd/cGU5ZVr8ZTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733326260; c=relaxed/simple; bh=wVnK2ofcypwI5P40i4apQOTUDZqigbVQ+yVfP24fI1I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=m3CXbAPfqX0krzsN+ZQ1WlU8Nc7Sa3xtfloV2rtrJu+SsgPCQ12CdPLUMG2n/je5+UnAp9gpM9oz0ShAyjYjAvxo66Tpx9VCb0rl7PwS5uHwRm05cKxhrcfnc52yoCXD/a2jAD6TCSLVqgbzPvrBLmZzVaxqqis5A+9PGczw1yk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=VhmVb4Z+; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="VhmVb4Z+" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: Russell King (Oracle) 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!