From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCH 2/2 v5] ahci: add "em_buffer" attribute for AHCI hosts Date: Fri, 23 Apr 2010 11:52:16 +0200 Message-ID: <4BD16DD0.2090900@kernel.org> References: <1272014918.3594.43.camel@zm-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:58748 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755647Ab0DWJw4 (ORCPT ); Fri, 23 Apr 2010 05:52:56 -0400 In-Reply-To: <1272014918.3594.43.camel@zm-desktop> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Harry Zhang Cc: jgarzik@pobox.com, linux-ide@vger.kernel.org, shane.huang@amd.com On 04/23/2010 11:28 AM, Harry Zhang wrote: > Add "em_buffer" attribute for SATA AHCI hosts to provide a way for > userland to access AHCI EM (enclosure management) buffer directly if the > host supports EM. > > AHCI driver should support SGPIO EM messages. However the SATA/AHCI > specs did not define the SGPIO message format filled in EM buffer. > Different HW vendors may have different definitions. The mainly purpose > of this attribute is to solve this issue by allowing HW vendors to > provide userland drivers and tools for their SGPIO initiators. > > Signed-off-by: Harry Zhang Acked-by: Tejun Heo Thanks. -- tejun