From patchwork Mon Aug 2 07:39:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: kajoljain X-Patchwork-Id: 12416639 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 smtp.subspace.kernel.org (Postfix) with ESMTPS id 6846F348B for ; Mon, 2 Aug 2021 07:40:33 +0000 (UTC) Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1727YKF6047916; Mon, 2 Aug 2021 03:40:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=9KfUvzYgAT3H6qM2KQ85LLSVJMiL9yuP9cnvQZGOeGU=; b=sq7LWapqUmOhyGDfdkbVU/HEO4UCopn3cb+V6C5XKLY+SD2hd9ZHfFgb6uuIY4uEFBiQ 6Z1CcR1gqHINW0Jw9jrtWLrWn4j0FM7juHoJbAN5XoDa/PqJvJcUl225ALI7TwiHiblQ M/lKCqJK47YOPJ6j+amWq4oq7UWcZtfAKCleaDwHqCBK1iUok9OrM/T+Yt3XmtoYdeXK p7uOZaLOu3qpYpAOdjmko1t+gCp/FudlXz9NlmAk5IxfLW9tkIz31hOFhBnY27LMKZRa uyHj2BLBc6KLim0zG73S7ylmVjWbOifH52GPvdptsDSNhp/Px/kK+PsvibZ8Rn0RNUqQ rg== Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 3a5qqtn9d6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 02 Aug 2021 03:40:24 -0400 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 1727c1RM032710; Mon, 2 Aug 2021 07:40:22 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma03ams.nl.ibm.com with ESMTP id 3a4x58v118-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 02 Aug 2021 07:40:22 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1727bS8F25559538 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 2 Aug 2021 07:37:28 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3CB61A404D; Mon, 2 Aug 2021 07:40:18 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 80504A4057; Mon, 2 Aug 2021 07:40:13 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.199.36.88]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 2 Aug 2021 07:40:13 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, peterz@infradead.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com Cc: maddy@linux.ibm.com, santosh@fossix.org, aneesh.kumar@linux.ibm.com, vaibhav@linux.ibm.com, atrajeev@linux.vnet.ibm.com, tglx@linutronix.de, kjain@linux.ibm.com, rnsastry@linux.ibm.com Subject: [PATCH v4 1/4] drivers/nvdimm: Add nvdimm pmu structure Date: Mon, 2 Aug 2021 13:09:26 +0530 Message-Id: <20210802073929.907431-2-kjain@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210802073929.907431-1-kjain@linux.ibm.com> References: <20210802073929.907431-1-kjain@linux.ibm.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 097XHNcPf_haabFt2UixDbZER5uXurlF X-Proofpoint-GUID: 097XHNcPf_haabFt2UixDbZER5uXurlF X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-08-02_01:2021-08-02,2021-08-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 bulkscore=0 phishscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 adultscore=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108020053 A structure is added, called nvdimm_pmu, for performance stats reporting support of nvdimm devices. It can be used to add nvdimm pmu data such as supported events and pmu event functions like event_init/add/read/del with cpu hotplug support. Acked-by: Peter Zijlstra (Intel) Reviewed-by: Madhavan Srinivasan Tested-by: Nageswara R Sastry Signed-off-by: Kajol Jain --- include/linux/nd.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/include/linux/nd.h b/include/linux/nd.h index ee9ad76afbba..712499cf7335 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -8,6 +8,8 @@ #include #include #include +#include +#include enum nvdimm_event { NVDIMM_REVALIDATE_POISON, @@ -23,6 +25,47 @@ enum nvdimm_claim_class { NVDIMM_CCLASS_UNKNOWN, }; +/* Event attribute array index */ +#define NVDIMM_PMU_FORMAT_ATTR 0 +#define NVDIMM_PMU_EVENT_ATTR 1 +#define NVDIMM_PMU_CPUMASK_ATTR 2 +#define NVDIMM_PMU_NULL_ATTR 3 + +/** + * struct nvdimm_pmu - data structure for nvdimm perf driver + * + * @name: name of the nvdimm pmu device. + * @pmu: pmu data structure for nvdimm performance stats. + * @dev: nvdimm device pointer. + * @functions(event_init/add/del/read): platform specific pmu functions. + * @attr_groups: data structure for events, formats and cpumask + * @cpu: designated cpu for counter access. + * @node: node for cpu hotplug notifier link. + * @cpuhp_state: state for cpu hotplug notification. + * @arch_cpumask: cpumask to get designated cpu for counter access. + */ +struct nvdimm_pmu { + const char *name; + struct pmu pmu; + struct device *dev; + int (*event_init)(struct perf_event *event); + int (*add)(struct perf_event *event, int flags); + void (*del)(struct perf_event *event, int flags); + void (*read)(struct perf_event *event); + /* + * Attribute groups for the nvdimm pmu. Index 0 used for + * format attribute, index 1 used for event attribute, + * index 2 used for cpusmask attribute and index 3 kept as NULL. + */ + const struct attribute_group *attr_groups[4]; + int cpu; + struct hlist_node node; + enum cpuhp_state cpuhp_state; + + /* cpumask provided by arch/platform specific code */ + struct cpumask arch_cpumask; +}; + struct nd_device_driver { struct device_driver drv; unsigned long type;