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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 1CB77C432C0 for ; Tue, 3 Dec 2019 04:20:11 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 C9B58206E0 for ; Tue, 3 Dec 2019 04:20:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C9B58206E0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=au1.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47Rpfw4CQJzDqS4 for ; Tue, 3 Dec 2019 15:20:08 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=au1.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=alastair@au1.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=au1.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47RnyT1Gw6zDqPN for ; Tue, 3 Dec 2019 14:48:32 +1100 (AEDT) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xB33kk5s078363 for ; Mon, 2 Dec 2019 22:48:30 -0500 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wm6rr0pd1-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 02 Dec 2019 22:48:30 -0500 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 3 Dec 2019 03:48:20 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xB33mJrE24707224 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 3 Dec 2019 03:48:19 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 33C694C040; Tue, 3 Dec 2019 03:48:19 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 857924C04A; Tue, 3 Dec 2019 03:48:18 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 3 Dec 2019 03:48:18 +0000 (GMT) Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 83126A03EA; Tue, 3 Dec 2019 14:48:13 +1100 (AEDT) From: "Alastair D'Silva" To: alastair@d-silva.org Subject: [PATCH v2 22/27] nvdimm/ocxl: Implement the heartbeat command Date: Tue, 3 Dec 2019 14:46:50 +1100 X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191203034655.51561-1-alastair@au1.ibm.com> References: <20191203034655.51561-1-alastair@au1.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19120303-0008-0000-0000-0000033C0FE0 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19120303-0009-0000-0000-00004A5B289D Message-Id: <20191203034655.51561-23-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-02_06:2019-11-29,2019-12-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=1 adultscore=0 spamscore=0 priorityscore=1501 mlxscore=0 bulkscore=0 mlxlogscore=894 lowpriorityscore=0 impostorscore=0 phishscore=0 clxscore=1015 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912030032 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Madhavan Srinivasan , Alexey Kardashevskiy , Keith Busch , Masahiro Yamada , Paul Mackerras , Mauro Carvalho Chehab , Ira Weiny , Thomas Gleixner , Rob Herring , Dave Jiang , linux-nvdimm@lists.01.org, Vishal Verma , Krzysztof Kozlowski , Anju T Sudhakar , Mahesh Salgaonkar , Andrew Donnellan , Arnd Bergmann , Greg Kurz , Nicholas Piggin , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Dan Williams , Hari Bathini , linux-mm@kvack.org, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Frederic Barrat , Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Alastair D'Silva The heartbeat admin command is a simple admin command that exercises the communication mechanisms within the controller. This patch issues a heartbeat command to the card during init to ensure we can communicate with the card's crontroller. Signed-off-by: Alastair D'Silva --- drivers/nvdimm/ocxl/scm.c | 43 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/nvdimm/ocxl/scm.c b/drivers/nvdimm/ocxl/scm.c index 8a30c887b5ed..e8b34262f397 100644 --- a/drivers/nvdimm/ocxl/scm.c +++ b/drivers/nvdimm/ocxl/scm.c @@ -353,6 +353,44 @@ static bool scm_is_usable(const struct scm_data *scm_data) return true; } +/** + * scm_heartbeat() - Issue a heartbeat command to the controller + * @scm_data: a pointer to the SCM device data + * Return: 0 if the controller responded correctly, negative on error + */ +static int scm_heartbeat(struct scm_data *scm_data) +{ + int rc; + + mutex_lock(&scm_data->admin_command.lock); + + rc = scm_admin_command_request(scm_data, ADMIN_COMMAND_HEARTBEAT); + if (rc) + goto out; + + rc = scm_admin_command_execute(scm_data); + if (rc) + goto out; + + rc = scm_admin_command_complete_timeout(scm_data, ADMIN_COMMAND_HEARTBEAT); + if (rc < 0) { + dev_err(&scm_data->dev, "Heartbeat timeout\n"); + goto out; + } + + rc = scm_admin_response(scm_data); + if (rc < 0) + goto out; + if (rc != STATUS_SUCCESS) + scm_warn_status(scm_data, "Unexpected status from heartbeat", rc); + + rc = scm_admin_response_handled(scm_data); + +out: + mutex_unlock(&scm_data->admin_command.lock); + return rc; +} + /** * allocate_scm_minor() - Allocate a minor number to use for an SCM device * @scm_data: The SCM device to associate the minor with @@ -1508,6 +1546,11 @@ static int scm_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err; } + if (scm_heartbeat(scm_data)) { + dev_err(&pdev->dev, "SCM Heartbeat failed\n"); + goto err; + } + elapsed = 0; timeout = scm_data->readiness_timeout + scm_data->memory_available_timeout; while (!scm_is_usable(scm_data)) { -- 2.23.0