From patchwork Mon Aug 2 09:02:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 12413587 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51656C19F38 for ; Mon, 2 Aug 2021 09:03:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3676860F9F for ; Mon, 2 Aug 2021 09:03:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233017AbhHBJDQ (ORCPT ); Mon, 2 Aug 2021 05:03:16 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:6555 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232881AbhHBJCz (ORCPT ); Mon, 2 Aug 2021 05:02:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1627894964; x=1659430964; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=HdzMOU/LeJVtqgIQ0L6R3yYK3hsl5WlTjCJZhu0jSx8=; b=iECMfPH+XpISIYPyRXExLOB6eWUQHsZ9sb9ueeCnzbMgD8OFIs7QJXxZ i209Kzc0hdV2dRHCAUfhmB8JAwyV0zIi2DOYeWOZHyELHg0VZIC6knzRj MghZfYmIsCKxwDhkJlwlOklD+jQuSoKGA3TWS+J7AMWmWMqS1zPeJ5X2q BDvJHQUcLH/lzOj5APV/VeHGhS/6NxjEC3Qf7230WeHuj54uOIoNI9/bA duquHK/QzsIYxSCRAY9anJb2Ku8zC3rzc35EVfhi5IQQIn0I9oXScTqFr 4/EC+tf086SyaJhiTubSMHKqKYtQfuN23sZKLQAnTcKphhtSX/MiWkVAP g==; X-IronPort-AV: E=Sophos;i="5.84,288,1620662400"; d="scan'208";a="180887627" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 02 Aug 2021 17:02:43 +0800 IronPort-SDR: mOCb55JzHUAUsLIQdh6PZ3d3u8sdARBsH5mQuE6QjlTWc0/iwKD5d+ua6XZ4EVFuB9G36azQw4 qs8AydeAsoONREZk51w5jK0y6hRtdQ5g1M3iZb1M09WkRu0OXDRTclreZCVy+16/xnjTkBMt4q +3QqxTQehm9YLhjjNYSysZ6vpaF//Mb2skR14ovin1o2FfYMH5Ogw+QW2T7N0A3k6O94XNUbkR XHp3Hr1bM5MpF6aAD+UWxDBcfCyq0aRYzgkt0SLoiZWy2TzbBNUd53mGDIe3B/iiqkYTBX3YOQ 2R5/K949H93Ui3rWTrk6Scmx Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Aug 2021 01:40:19 -0700 IronPort-SDR: oNBX9ORnT0Cm8EZHt+dJBibyRuKOAB63u0ptFs80pIzE8t/EhYYUkKZcaakISD0kOyx1c8xrBX 5yiRkMXOveGqW9/wUn5IcYzqdvMgue+hQ0XoXwIKiXBTm9LAvjfKqMIWivuAJxDo5XcfWkWofd w/vjFIQoYJL65paBrJmW0At7NsZNNHLnQ7oifyGB4/s3d2xdmgWceWNQ8IOLConYzJZrwlJnxu o3zIS2Rs81rdszgSqShBpAwNEZVGjaWKDh1/lMAk3oT6gL5QtkXqI4ioVr2ImSCP/t+0EnAPrl RHk= WDCIronportException: Internal Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 02 Aug 2021 02:02:44 -0700 From: Damien Le Moal To: Jens Axboe , linux-block@vger.kernel.org, linux-ide@vger.kernel.org, "Martin K . Petersen" , linux-scsi@vger.kernel.org Cc: Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani Subject: [PATCH 7/7] scsi: mpt3sas: Introduce sas_ncq_prio_supported sysfs sttribute Date: Mon, 2 Aug 2021 18:02:32 +0900 Message-Id: <20210802090232.1166195-8-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210802090232.1166195-1-damien.lemoal@wdc.com> References: <20210802090232.1166195-1-damien.lemoal@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Similarly to AHCI, introduce the device sysfs attribute sas_ncq_prio_supported to advertize if a SATA device supports the NCQ priority feature. Without this new attribute, the user can only discover if a SATA device supports NCQ priority by trying to enable the feature use with the sas_ncq_prio_enable sysfs device attribute, which fails when the device does not support high priroity commands. Signed-off-by: Damien Le Moal --- drivers/scsi/mpt3sas/mpt3sas_ctl.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c index b66140e4c370..7bce8288fb4f 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c +++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c @@ -3918,6 +3918,25 @@ sas_device_handle_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(sas_device_handle); +/** + * sas_ncq_prio_supported_show - Indicate if device supports NCQ priority + * @dev: pointer to embedded device + * @attr: sas_ncq_prio_supported attribute desciptor + * @buf: the buffer returned + * + * A sysfs 'read/write' sdev attribute, only works with SATA + */ +static ssize_t +sas_ncq_prio_supported_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct scsi_device *sdev = to_scsi_device(dev); + + return snprintf(buf, PAGE_SIZE, "%d\n", + scsih_ncq_prio_supp(sdev)); +} +static DEVICE_ATTR_RO(sas_ncq_prio_supported); + /** * sas_ncq_prio_enable_show - send prioritized io commands to device * @dev: pointer to embedded device @@ -3960,6 +3979,7 @@ static DEVICE_ATTR_RW(sas_ncq_prio_enable); struct device_attribute *mpt3sas_dev_attrs[] = { &dev_attr_sas_address, &dev_attr_sas_device_handle, + &dev_attr_sas_ncq_prio_supported, &dev_attr_sas_ncq_prio_enable, NULL, };