From patchwork Fri Feb 21 03:27:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alastair D'Silva X-Patchwork-Id: 11395403 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9480C1395 for ; Fri, 21 Feb 2020 03:28:55 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (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 7C60B208E4 for ; Fri, 21 Feb 2020 03:28:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C60B208E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=au1.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 8602210FC36CE; Thu, 20 Feb 2020 19:29:24 -0800 (PST) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=alastair@au1.ibm.com; receiver= Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id C2F3510FC360B for ; Thu, 20 Feb 2020 19:29:16 -0800 (PST) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01L3KRO8014794 for ; Thu, 20 Feb 2020 22:28:24 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2y8ubxwp5t-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 20 Feb 2020 22:28:24 -0500 Received: from localhost by e06smtp01.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) Fri, 21 Feb 2020 03:28:12 -0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01L3SBMp64749690 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Feb 2020 03:28:11 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 78E59AE045; Fri, 21 Feb 2020 03:28:11 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C4B6BAE053; Fri, 21 Feb 2020 03:28:10 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 21 Feb 2020 03:28:10 +0000 (GMT) Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id DE068A03E3; Fri, 21 Feb 2020 14:28:03 +1100 (AEDT) From: "Alastair D'Silva" To: alastair@d-silva.org Subject: [PATCH v3 22/27] powerpc/powernv/pmem: Implement the heartbeat command Date: Fri, 21 Feb 2020 14:27:15 +1100 X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200221032720.33893-1-alastair@au1.ibm.com> References: <20200221032720.33893-1-alastair@au1.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 20022103-4275-0000-0000-000003A3FE66 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20022103-4276-0000-0000-000038B80C7D Message-Id: <20200221032720.33893-23-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-20_19:2020-02-19,2020-02-20 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 phishscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 suspectscore=1 malwarescore=0 mlxlogscore=876 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002210020 Message-ID-Hash: 64QOM6UTXZ2JIW6KNNB656JVEGW5FETZ X-Message-ID-Hash: 64QOM6UTXZ2JIW6KNNB656JVEGW5FETZ X-MailFrom: alastair@au1.ibm.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: "Aneesh Kumar K . V" , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Andrew Morton , Mauro Carvalho Chehab , "David S. Miller" , Rob Herring , Anton Blanchard , Krzysztof Kozlowski , Mahesh Salgaonkar , Madhavan Srinivasan , =?utf-8?q?C=C3=A9dric_Le_Go?= =?utf-8?q?ater?= , Anju T Sudhakar , Hari Bathini , Thomas Gleixner , Greg Kurz , Nicholas Piggin , Masahiro Yamada , Alexey Kardashevskiy , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: 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 controller. Signed-off-by: Alastair D'Silva Reviewed-by: Andrew Donnellan --- arch/powerpc/platforms/powernv/pmem/ocxl.c | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/arch/powerpc/platforms/powernv/pmem/ocxl.c b/arch/powerpc/platforms/powernv/pmem/ocxl.c index 081883a8247a..e01f6f9fc180 100644 --- a/arch/powerpc/platforms/powernv/pmem/ocxl.c +++ b/arch/powerpc/platforms/powernv/pmem/ocxl.c @@ -306,6 +306,44 @@ static bool is_usable(const struct ocxlpmem *ocxlpmem, bool verbose) return true; } +/** + * heartbeat() - Issue a heartbeat command to the controller + * @ocxlpmem: the device metadata + * Return: 0 if the controller responded correctly, negative on error + */ +static int heartbeat(struct ocxlpmem *ocxlpmem) +{ + int rc; + + mutex_lock(&ocxlpmem->admin_command.lock); + + rc = admin_command_request(ocxlpmem, ADMIN_COMMAND_HEARTBEAT); + if (rc) + goto out; + + rc = admin_command_execute(ocxlpmem); + if (rc) + goto out; + + rc = admin_command_complete_timeout(ocxlpmem, ADMIN_COMMAND_HEARTBEAT); + if (rc < 0) { + dev_err(&ocxlpmem->dev, "Heartbeat timeout\n"); + goto out; + } + + rc = admin_response(ocxlpmem); + if (rc < 0) + goto out; + if (rc != STATUS_SUCCESS) + warn_status(ocxlpmem, "Unexpected status from heartbeat", rc); + + (void)admin_response_handled(ocxlpmem); + +out: + mutex_unlock(&ocxlpmem->admin_command.lock); + return rc; +} + /** * allocate_minor() - Allocate a minor number to use for an OpenCAPI pmem device * @ocxlpmem: the device metadata @@ -1458,6 +1496,11 @@ static int probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err; } + if (heartbeat(ocxlpmem)) { + dev_err(&pdev->dev, "Heartbeat failed\n"); + goto err; + } + elapsed = 0; timeout = ocxlpmem->readiness_timeout + ocxlpmem->memory_available_timeout; while (!is_usable(ocxlpmem, false)) {