Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755577AbbHYM6K (ORCPT ); Tue, 25 Aug 2015 08:58:10 -0400 Received: from mail-wi0-f180.google.com ([209.85.212.180]:35238 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754619AbbHYM6H (ORCPT ); Tue, 25 Aug 2015 08:58:07 -0400 Date: Tue, 25 Aug 2015 14:58:04 +0200 From: Pali =?utf-8?B?Um9ow6Fy?= To: Mark Lord Cc: Robert Hancock , Jeff Garzik , Robert Hancock , Tejun Heo , "linux-ide@vger.kernel.org" , linux-kernel Subject: Re: linux: sata_nv: adma support Message-ID: <20150825125804.GE16715@pali> References: <201412232051.07067@pali> <201508012209.27974@pali> <55DC4F65.70402@start.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <55DC4F65.70402@start.ca> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1814 Lines: 49 On Tuesday 25 August 2015 07:20:05 Mark Lord wrote: > On 15-08-01 09:45 PM, Robert Hancock wrote: > >On Sat, Aug 1, 2015 at 2:09 PM, Pali Rohár wrote: > >>On Thursday 25 December 2014 07:22:13 Robert Hancock wrote: > >>>On Tue, Dec 23, 2014 at 1:51 PM, Pali Rohár > >>>wrote: > >>>>Hello, > >>>> > >>>>I have nvidia nforce4 motherboard with nvidia sata controller: > .. > >>>It looks like something is trying to issue a command to disable APM > >>>power management on the drive, and the command fails (likely because > >>>it doesn't support that command). > .. > >> /sbin/hdparm -B254 $DRIVE > >> > >>And that -B254 cause above error message in dmesg log. Output from > >>hdparm is: > >> > >> /dev/sda: > >> setting Advanced Power Management level to 0xfe (254) > >> APM_level = not supported > .. > >> $ sudo hdparm -I /dev/sda | grep -i power > >> * Power Management feature set > > That's not the same as APM ("Advanced" Power Management). > > >However, these NVIDIA SATAs are black boxes, and rather buggy ones at that, > >so it's possible there's an unknown issue there. > > I wonder if NVIDIA simply bought out the IP from Pacific Digital > when they went bust? Pacific Digital invented the original "ADMA", > and the pdc_adma.c driver in the kernel knows all about it. > If the IP is pretty similar (identical?) then we could probably > improve things. > Can you check if nvidia ADMA code and that Pacific Digital ADMA code is similar or not? -- Pali Rohár pali.rohar@gmail.com -- 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/