From patchwork Mon Jan 11 23:12:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyrel Datwyler X-Patchwork-Id: 362578 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=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 C42E8C43381 for ; Tue, 12 Jan 2021 00:25:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 96A1422D58 for ; Tue, 12 Jan 2021 00:25:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403885AbhALAZs (ORCPT ); Mon, 11 Jan 2021 19:25:48 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:55234 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403889AbhAKXNZ (ORCPT ); Mon, 11 Jan 2021 18:13:25 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 10BN3Gmv039990; Mon, 11 Jan 2021 18:12:40 -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=NTQh5Mca0fUVUHflOLrQ8uuJoSPpDULjBgxVxWMPUSI=; b=NfrwnJb0lHkQgIJucUKtK2eC11XvShqxQewA68VZdiEL9USDSm3T1aPJwS3zKQNd+1qK 2rqbEPxPOz4HOfcAtQC7Mj/UkB8lpntVvFq6DzPz2N8gRp1mL83bWMgcz5G839VzAh5o Zh98nYbOjsik5q1IauGPJ7hd6RhEn+oqiKYlxa4gARWSTWSmr8pV9Q1W2D+/l+FvyMln +CSgzQMNzW8O3VIvRRv/J4ewVUn/EVq1bZTio28qKXW3NIdt0aKMXdXgMghNYWxnsm3e AQXB1KDCwqF+IL1bgQQafvTqUl26oSIymaCpQ1meEC4r8Uj2wJEFnGqArqcNR/lpGBv5 aQ== Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0a-001b2d01.pphosted.com with ESMTP id 360xh4tnnj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 11 Jan 2021 18:12:40 -0500 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 10BN8Uwc022002; Mon, 11 Jan 2021 23:12:39 GMT Received: from b03cxnp08027.gho.boulder.ibm.com (b03cxnp08027.gho.boulder.ibm.com [9.17.130.19]) by ppma04dal.us.ibm.com with ESMTP id 35y448xfj2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 11 Jan 2021 23:12:39 +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 10BNCc5Q9830812 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 11 Jan 2021 23:12:38 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 13ABC7805C; Mon, 11 Jan 2021 23:12:38 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9CEA878060; Mon, 11 Jan 2021 23:12:37 +0000 (GMT) Received: from vios4361.aus.stglabs.ibm.com (unknown [9.3.43.61]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 11 Jan 2021 23:12:37 +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 v4 21/21] ibmvfc: provide modules parameters for MQ settings Date: Mon, 11 Jan 2021 17:12:25 -0600 Message-Id: <20210111231225.105347-22-tyreld@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210111231225.105347-1-tyreld@linux.ibm.com> References: <20210111231225.105347-1-tyreld@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2021-01-11_34:2021-01-11,2021-01-11 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 malwarescore=0 adultscore=0 mlxlogscore=999 bulkscore=0 impostorscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101110130 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 --- drivers/scsi/ibmvscsi/ibmvfc.c | 75 ++++++++++++++++++++++++++++++---- 1 file changed, 66 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index b413f5da71ce..6a64735d9652 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) "]"); @@ -926,7 +948,7 @@ 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]; spin_lock(scrq->q_lock); memset(scrq->msgs.scrq, 0, PAGE_SIZE); @@ -3394,6 +3416,37 @@ 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); @@ -3402,6 +3455,8 @@ 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 /** @@ -3458,6 +3513,7 @@ static struct device_attribute *ibmvfc_attrs[] = { &dev_attr_npiv_version, &dev_attr_capabilities, &dev_attr_log_level, + &dev_attr_nr_scsi_channels, NULL }; @@ -4863,9 +4919,9 @@ 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); @@ -5652,13 +5708,13 @@ 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); @@ -5682,7 +5738,7 @@ 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); @@ -5880,12 +5936,13 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) shost->transportt = ibmvfc_transport_template; shost->can_queue = max_requests; + 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_MQ ? IBMVFC_SCSI_HW_QUEUES : 1; + shost->nr_hw_queues = mq_enabled ? nr_scsi_hw_queues : 1; vhost = shost_priv(shost); INIT_LIST_HEAD(&vhost->targets); @@ -5897,8 +5954,8 @@ 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;