From patchwork Fri Aug 6 11:11:45 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: 493083 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=-16.6 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 56C22C4338F for ; Fri, 6 Aug 2021 11:12:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D55661186 for ; Fri, 6 Aug 2021 11:12:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245398AbhHFLM1 (ORCPT ); Fri, 6 Aug 2021 07:12:27 -0400 Received: from esa6.hgst.iphmx.com ([216.71.154.45]:47118 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245396AbhHFLMT (ORCPT ); Fri, 6 Aug 2021 07:12:19 -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=1628248325; x=1659784325; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=v0axotK745BOmKq1hqhT1UMPhW1oSJVk5yL66WtuDMY=; b=erlzAz2lDZ3965euaEZQlacWHwpk7EFCO0zBgLyqFU6KfcVtvtHJsODG 6dPKGKzZo0EoQ4wQgMQBEumQy/Bj5aa1X4EEqJY9a36KrpsQdICwMISkT BWWh1JraLn0DG/DnZFDsJ4PBHylnaI8q+2W924LOauHfjnec1nHTauuCn 545xLLWjS07WsoYeO42FoqRiiCb0EoTIJM3ZahFYQhMsAZr1S+gWT2RHe /oQY7/6u0Xnt1H0OTLkVSitPF0GEc6QX86CaVvhoqId8qn6aEku8UpY3Q a3U47Kdt7vCqwcX6DW1NG0AyN1AmGVGQ7+tpRT/QP1Mc+Lhf5BmCheIhZ Q==; X-IronPort-AV: E=Sophos;i="5.84,300,1620662400"; d="scan'208";a="177055568" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 06 Aug 2021 19:12:04 +0800 IronPort-SDR: KTaKKAuxVbRs2y53ZPO6heWYS0R/XuqE6zt5GHiaKfN8HeJS4yZqplcSqAVPzIDB0RONQi7GlD dlGffleNl+ZeyUHXNjO6d7UU5dlW7dk8qU+jNXBy+odRcqobgElZyDxG+NN07RqhfoI4Bw3KxD 5VFQlKy4k/X1yfi4YJ+IJlrgsbrA+sJIuL5Wos3l6u6bryRrwXRaNJoufJklYe2J4MxH7zGPim x7nCNVY7ZtBTvFjBmOW3BQpu7tS//an/dhXmt2y9eY3D9RHWdDQmE1bTJrIEZCI/WKg6e3LLfp 3V3TAmBWduWXfGqKEwyVBJGx Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2021 03:47:39 -0700 IronPort-SDR: xUdRLdaF8Z1wH2PxSgxa8xDUk+opTC5ZVk52K0P3Rz17/ojCUYPqu86ToEih30t7uatRGKv1yH NV6d/IU9rVO7h1jMDziL+sbHVvNQl4ukolPRT97FNcaeVV7tIXO4cR9N7VCP3gem/W7QbL9Ngz G+kveD2HxQluQl8JxlsOQd2v4OqlLJR/waZQM5AfAXVlImZOJwbBbs89urbWnG9qWqyW6vEhvb 1FVcvCYRKX/ccmqsPtHjjGr9g56hItWVKnS2Z+pjNdeylu2HcyR5a36lvauwMzxE3rF3I2fj3q xA0= WDCIronportException: Internal Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 06 Aug 2021 04:12:02 -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 v3 9/9] scsi: mpt3sas: Introduce sas_ncq_prio_supported sysfs sttribute Date: Fri, 6 Aug 2021 20:11:45 +0900 Message-Id: <20210806111145.445697-10-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210806111145.445697-1-damien.lemoal@wdc.com> References: <20210806111145.445697-1-damien.lemoal@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@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 Reviewed-by: Hannes Reinecke --- drivers/scsi/mpt3sas/mpt3sas_ctl.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c index b66140e4c370..f83d4d32d459 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c +++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c @@ -3918,6 +3918,24 @@ 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 descriptor + * @buf: the buffer returned + * + * A sysfs 'read-only' 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 sysfs_emit(buf, "%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 +3978,7 @@ 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, };