Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752613AbbKIRdj (ORCPT ); Mon, 9 Nov 2015 12:33:39 -0500 Received: from mail-lb0-f182.google.com ([209.85.217.182]:33705 "EHLO mail-lb0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752403AbbKIRde (ORCPT ); Mon, 9 Nov 2015 12:33:34 -0500 Subject: Re: [PATCH] mips: sb1250_swarm_defconfig: disable IDE subsystem To: "Maciej W. Rozycki" , Ralf Baechle References: <1442245918-27631-1-git-send-email-b.zolnierkie@samsung.com> <1442245918-27631-16-git-send-email-b.zolnierkie@samsung.com> <20151109144932.GE22591@linux-mips.org> Cc: Bartlomiej Zolnierkiewicz , linux-mips@linux-mips.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org From: Sergei Shtylyov Organization: Cogent Embedded Message-ID: <5640D8E9.7080808@cogentembedded.com> Date: Mon, 9 Nov 2015 20:33:29 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1649 Lines: 39 Hello. On 11/09/2015 07:18 PM, Maciej W. Rozycki wrote: >>> I can check if things still work correctly when routed through libata, >>> although it'll have to wait a couple of weeks yet at the least as I have >>> wired my SWARM for hardware debugging, making it not immediately bootable >>> and I'll be departing soon (i.e. I have no time for complicated fiddling). >>> The host driver itself is actually in arch/mips/sibyte/swarm/platform.c >>> BTW. >>> >>> Note to self: it would be nice if physical rather than virtual MMIO >>> addresses were reported too. >> >> Part of the problem is that everybody who is serious about using a Swarm >> is using PCI PATA/SATA card, so this part receives very little TLC. I >> btw. can't test because the controller on my Pass 2 board is broken ... > > I think I've been reasonably serious about my SWARM and despite issues > elsewhere the onboard PATA interface is a part of the system I've never > had any with. Yes, it's limited to PIO 3, but it's not a big deal, that's > still 11MB/s (and one of the 4 generic data movers present in the SoC If you measure it with something like 'hdparm -t', the real speed figures in the PIO modes would disappoint you. It's usually more like 3 MB/s even in PIO4... > could be used as a DMA engine to offload the CPU if anyone bothered > implementing that in the HBA driver). Oh, that's nice! MBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/