From mboxrd@z Thu Jan 1 00:00:00 1970 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=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT autolearn=ham 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 4822AC433E0 for ; Wed, 17 Mar 2021 20:51:44 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B410364E74 for ; Wed, 17 Mar 2021 20:51:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B410364E74 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:MIME-Version:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QcwBFv+aVuMjbRJcWUOlT1Ts1pCrJjPV1jtIn5EDp+M=; b=MtyVhRrLUQsN1+OTmebD26Vnah QMP6wTQeYySz3fCwv1q8T9iLcKXGd9jkjjqp8isstgJGIthnj4K4ZE1M2HcLFyYy/oFbnzNWG0a0P ZV1ozI1OAhRbQMa7YXU8R3gExq8gJqYPgaZ53E8nWb9uJ1D5r1ns8nTNI/szGigaqPBg1Ojll3Am7 rYUyibsedu0IdEeAFPneMHGSbVLhTiThFrCPp4DukUZMtwFNjPmMEIdGDNS0NhDH4OzjXV8P10XyN WYTCNcJbonfcGG13fcE3wlngrgNcJLj9pST2CJyAu+lqHPgvvsTAfmmjMuS+YhlYm5eEKsiEAjc5U ywjXPVug==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lMd8J-003swi-2h; Wed, 17 Mar 2021 20:51:11 +0000 Received: from aserp2120.oracle.com ([141.146.126.78]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lMd42-003sdn-6Y for linux-nvme@lists.infradead.org; Wed, 17 Mar 2021 20:47:42 +0000 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 12HKfPxS155367; Wed, 17 Mar 2021 20:46:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=KeHOMw0AkghoUugZ/9YxQC2wHPZ6vu5PdwsZV8rTZuo=; b=JXuuIMH6YIhXpFB923x5uL7ruXFytVccIZ2Luqv5YDFrQ4pJyapLfPSacTFAtJL6XcEh lP0BbNTBeOVx+BR1a3jpnGbHA7V3PmnsTwizfvQVAtygxqb0WEYUQfOCCcGugfmMKBBm b1cwIYi+x4hewXxg95NHTJj7JEhGlAeGGQ55qkl6GVnHVjiuhCDev95f0gMvUB9QNTpv XPCB23eey9Fe6Ap9WLm+8JvD1dGKRm/5bdOlNwuO3nrE4GbMz42KLA5duVn5v6oTDsFu 25QuNQV8b2RKlyoxDRmJZuw1qLkxylFP7YDzlfqOTBv8evYwNRNVoCcnku1sVmlmjaGe aQ== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 378nbmdgg1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Mar 2021 20:46:33 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 12HKjSVs074572; Wed, 17 Mar 2021 20:46:30 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3020.oracle.com with ESMTP id 37a4euvm9k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Mar 2021 20:46:30 +0000 Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 12HKkNdK001226; Wed, 17 Mar 2021 20:46:23 GMT Received: from localhost.us.oracle.com (/10.147.27.236) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 17 Mar 2021 13:46:23 -0700 From: Alan Adamson To: linux-nvme@lists.infradead.org Cc: alan.adamson@oracle.com, kbusch@kernel.org, axboe@fb.com, hch@lst.de, sagi@grimberg.me Subject: [PATCH 1/1] nvme: Export CSTS register via sysfs Date: Wed, 17 Mar 2021 16:46:15 -0400 Message-Id: <20210317204615.13971-2-alan.adamson@oracle.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20210317204615.13971-1-alan.adamson@oracle.com> References: <20210317204615.13971-1-alan.adamson@oracle.com> X-Proofpoint-IMR: 1 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9926 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103170146 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9926 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 mlxscore=0 clxscore=1011 mlxlogscore=999 lowpriorityscore=0 phishscore=0 priorityscore=1501 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103170145 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210317_204741_297426_254DCB10 X-CRM114-Status: GOOD ( 16.08 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org This exposes a sysfs method a user can invoke to request read-only access to a NVMe Controller's CSTS (Controller Status) Register. Signed-off-by: Alan Adamson Reviewed-by: Himanshu Madhani --- drivers/nvme/host/core.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index e68a8c4ac5a6..7736b8b0891c 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3683,9 +3683,24 @@ static ssize_t nvme_ctrl_reconnect_delay_store(struct device *dev, ctrl->opts->reconnect_delay = v; return count; } + +static ssize_t nvme_ctrl_csts_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nvme_ctrl *ctrl = dev_get_drvdata(dev); + u32 csts; + + ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts); + + return sprintf(buf, "%d\n", csts); +} + static DEVICE_ATTR(reconnect_delay, S_IRUGO | S_IWUSR, nvme_ctrl_reconnect_delay_show, nvme_ctrl_reconnect_delay_store); +static DEVICE_ATTR(csts, S_IRUGO | S_IWUSR, + nvme_ctrl_csts_show, NULL); + static struct attribute *nvme_dev_attrs[] = { &dev_attr_reset_controller.attr, &dev_attr_rescan_controller.attr, @@ -3705,6 +3720,7 @@ static struct attribute *nvme_dev_attrs[] = { &dev_attr_hostid.attr, &dev_attr_ctrl_loss_tmo.attr, &dev_attr_reconnect_delay.attr, + &dev_attr_csts.attr, NULL }; -- 2.18.4 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme