From patchwork Thu Dec 3 02:08:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyrel Datwyler X-Patchwork-Id: 337414 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 41C30C8301A for ; Thu, 3 Dec 2020 02:09:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C0C4221EB for ; Thu, 3 Dec 2020 02:09:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729562AbgLCCJK (ORCPT ); Wed, 2 Dec 2020 21:09:10 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:22406 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729548AbgLCCJI (ORCPT ); Wed, 2 Dec 2020 21:09:08 -0500 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0B3250jC128371; Wed, 2 Dec 2020 21:08:23 -0500 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=DPj0YSggplOvuiVrgSY90VVLutSqNS/gveNO1fE1x98=; b=kkMLOCFlfmRoZSr/XiD8jrSYWGvp4iZTimyP4pRnl5fJkOi8+4gLNDB4qgYMkT9e7Zcr WWgPVoOzOFB3yHNJZL9rj2ko4Uk25Nf+0P6hMWREVYDy7baknJ0jrTzMsCX0ujWso/1r nedsRBY/ItEOUWwgqgetvznjKV7im8IZjy2sI3C1k3q7YIDHV/r/F909a+A/EzakK+Sq 0RSvYa9/+yQqZAZqOGDFzsEB828dyRpyJ5Mb6tKcdRZJslmHEwd+DFlKsolyq/tNOOoh w4Y55SWR9pUPgWQkzgNjrUvS4nKW0yCgO6Y+Ho0XqsroDTmul+gzHgsza9/uVl3SDcTa Cw== Received: from ppma01dal.us.ibm.com (83.d6.3fa9.ip4.static.sl-reverse.com [169.63.214.131]) by mx0a-001b2d01.pphosted.com with ESMTP id 356p2kh3nh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 02 Dec 2020 21:08:23 -0500 Received: from pps.filterd (ppma01dal.us.ibm.com [127.0.0.1]) by ppma01dal.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0B327Wmk010529; Thu, 3 Dec 2020 02:08:22 GMT Received: from b03cxnp08027.gho.boulder.ibm.com (b03cxnp08027.gho.boulder.ibm.com [9.17.130.19]) by ppma01dal.us.ibm.com with ESMTP id 355rf7pxbg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Dec 2020 02:08:22 +0000 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0B328Eet22807166 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 3 Dec 2020 02:08:14 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 031207805F; Thu, 3 Dec 2020 02:08:21 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7910D78068; Thu, 3 Dec 2020 02:08:20 +0000 (GMT) Received: from vios4361.aus.stglabs.ibm.com (unknown [9.3.43.61]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 3 Dec 2020 02:08:20 +0000 (GMT) From: Tyrel Datwyler To: james.bottomley@hansenpartnership.com Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, brking@linux.ibm.com, Tyrel Datwyler Subject: [PATCH v3 17/18] ibmvfc: provide modules parameters for MQ settings Date: Wed, 2 Dec 2020 20:08:05 -0600 Message-Id: <20201203020806.14747-18-tyreld@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201203020806.14747-1-tyreld@linux.ibm.com> References: <20201203020806.14747-1-tyreld@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-12-02_14:2020-11-30,2020-12-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=1 lowpriorityscore=0 mlxlogscore=999 malwarescore=0 clxscore=1015 impostorscore=0 mlxscore=0 priorityscore=1501 phishscore=0 spamscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012030009 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add the various module parameter toggles for adjusting the MQ characteristics at boot/load time as well as a device attribute for changing the client scsi channel request amount. Signed-off-by: Tyrel Datwyler Reviewed-by: Brian King --- drivers/scsi/ibmvscsi/ibmvfc.c | 76 +++++++++++++++++++++++++++++----- 1 file changed, 66 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index e353b9e88104..e499599662ec 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -40,6 +40,12 @@ static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; static unsigned int ibmvfc_debug = IBMVFC_DEBUG; static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; static unsigned int cls3_error = IBMVFC_CLS3_ERROR; +static unsigned int mq_enabled = IBMVFC_MQ; +static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; +static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; +static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; +static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; + static LIST_HEAD(ibmvfc_head); static DEFINE_SPINLOCK(ibmvfc_driver_lock); static struct scsi_transport_template *ibmvfc_transport_template; @@ -49,6 +55,22 @@ MODULE_AUTHOR("Brian King "); MODULE_LICENSE("GPL"); MODULE_VERSION(IBMVFC_DRIVER_VERSION); +module_param_named(mq, mq_enabled, uint, S_IRUGO); +MODULE_PARM_DESC(mq, "Enable multiqueue support. " + "[Default=" __stringify(IBMVFC_MQ) "]"); +module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); +MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " + "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); +module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); +MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " + "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); +module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); +MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " + "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); +module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); +MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " + "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); + module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); @@ -823,7 +845,7 @@ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) crq->cur = 0; if (vhost->scsi_scrqs.scrqs) { - for (i = 0; i < IBMVFC_SCSI_HW_QUEUES; i++) { + for (i = 0; i < nr_scsi_hw_queues; i++) { scrq = &vhost->scsi_scrqs.scrqs[i]; memset(scrq->msgs, 0, PAGE_SIZE); scrq->cur = 0; @@ -3234,6 +3256,37 @@ static ssize_t ibmvfc_store_log_level(struct device *dev, return strlen(buf); } +static ssize_t ibmvfc_show_scsi_channels(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + int len; + + spin_lock_irqsave(shost->host_lock, flags); + len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); + spin_unlock_irqrestore(shost->host_lock, flags); + return len; +} + +static ssize_t ibmvfc_store_scsi_channels(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + unsigned int channels; + + spin_lock_irqsave(shost->host_lock, flags); + channels = simple_strtoul(buf, NULL, 10); + vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); + ibmvfc_hard_reset_host(vhost); + spin_unlock_irqrestore(shost->host_lock, flags); + return strlen(buf); +} + static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); @@ -3242,6 +3295,8 @@ static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, ibmvfc_show_log_level, ibmvfc_store_log_level); +static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, + ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); #ifdef CONFIG_SCSI_IBMVFC_TRACE /** @@ -3298,6 +3353,7 @@ static struct device_attribute *ibmvfc_attrs[] = { &dev_attr_npiv_version, &dev_attr_capabilities, &dev_attr_log_level, + &dev_attr_nr_scsi_channels, NULL }; @@ -4685,9 +4741,9 @@ static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); mad->common.length = cpu_to_be16(sizeof(*mad)); - if (IBMVFC_MIG_NO_SUB_TO_CRQ) + if (mig_channels_only) mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); - if (IBMVFC_MIG_NO_N_TO_M) + if (mig_no_less_channels) mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); @@ -5426,13 +5482,13 @@ static int ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) ENTER; - vhost->scsi_scrqs.scrqs = kcalloc(IBMVFC_SCSI_HW_QUEUES, + vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, sizeof(*vhost->scsi_scrqs.scrqs), GFP_KERNEL); if (!vhost->scsi_scrqs.scrqs) return -1; - for (i = 0; i < IBMVFC_SCSI_HW_QUEUES; i++) { + for (i = 0; i < nr_scsi_hw_queues; i++) { if (ibmvfc_register_scsi_channel(vhost, i)) { for (j = i; j > 0; j--) ibmvfc_deregister_scsi_channel(vhost, j - 1); @@ -5456,7 +5512,7 @@ static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) if (!vhost->scsi_scrqs.scrqs) return; - for (i = 0; i < IBMVFC_SCSI_HW_QUEUES; i++) + for (i = 0; i < nr_scsi_hw_queues; i++) ibmvfc_deregister_scsi_channel(vhost, i); kfree(vhost->scsi_scrqs.scrqs); @@ -5668,13 +5724,13 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) } shost->transportt = ibmvfc_transport_template; - shost->can_queue = (max_requests / IBMVFC_SCSI_HW_QUEUES); + shost->can_queue = (max_requests / nr_scsi_hw_queues); shost->max_lun = max_lun; shost->max_id = max_targets; shost->max_sectors = IBMVFC_MAX_SECTORS; shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; shost->unique_id = shost->host_no; - shost->nr_hw_queues = IBMVFC_SCSI_HW_QUEUES; + shost->nr_hw_queues = nr_scsi_hw_queues; vhost = shost_priv(shost); INIT_LIST_HEAD(&vhost->sent); @@ -5687,8 +5743,8 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) vhost->log_level = log_level; vhost->task_set = 1; - vhost->mq_enabled = IBMVFC_MQ; - vhost->client_scsi_channels = IBMVFC_SCSI_CHANNELS; + vhost->mq_enabled = mq_enabled; + vhost->client_scsi_channels = min(nr_scsi_hw_queues, nr_scsi_channels); vhost->using_channels = 0; vhost->do_enquiry = 1;