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=-18.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MIME_NO_TEXT, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8B09BC433E0 for ; Mon, 1 Feb 2021 09:31:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33B1C64DE7 for ; Mon, 1 Feb 2021 09:31:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232509AbhBAJbn (ORCPT ); Mon, 1 Feb 2021 04:31:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231598AbhBAJbj (ORCPT ); Mon, 1 Feb 2021 04:31:39 -0500 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84C3DC06174A for ; Mon, 1 Feb 2021 01:30:59 -0800 (PST) Received: by mail-pj1-x1030.google.com with SMTP id gx20so1354308pjb.1 for ; Mon, 01 Feb 2021 01:30:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:mime-version; bh=AvHFm7jFjX1UJ3OfW+0ah1cjBD7hL+nXr/oNPP7hXT0=; b=C88MxIl1rBlk0+5xNWRRCBsU9rBioZAU2SLYZKTviZpHavTGhaitR/7rt4w4hGDYpf 3wNNSuFZtpU2NgHI3A2Qkpa5GtiFr5HRVzq60MsMsfY7CZwm1dwVPkCXxnzAnDqeU7Vb 6IfmRkmpEY+L53twxKvC+iuiNGiqcTg6DH628= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version; bh=AvHFm7jFjX1UJ3OfW+0ah1cjBD7hL+nXr/oNPP7hXT0=; b=QCc4AVayU/D3uhzX2amlcvH5pYVqQ6Z8VQML1KxIBADQlxv2Z38/MIz2ezIcAg1bKz Or8x3jnhJlO3EfYJUKrOrLTW46RLVLmnYABsXDaX5axZLyY3UIM/E7UjrFMpNx/VeXPp lP+qrqCYgl4QSfFyFarLvwUnsR1mFsTon6WT+4I5dG16woULrlv4CO5ZG/3D/cEfqLpR AZQZ9LcJuGY7IzmjY+ICf8vqOLjmbXX6z3Q6olC5nFrcxgXcD/g2azvOpr9NdxRgfxd+ gJiavO+MowI804+TCxt2dhI2wh/ora/cS7qim99YFQbTpGTVaMOGSSInLxHdYcM4z92k sv4A== X-Gm-Message-State: AOAM5321OoOGK+IlNl2NxChyaeCZbTGjKhhQjJ6AWCl+3ca4GlI2vKxB v1OzIPdDmJ0n2UzYISyW1ON6FQ== X-Google-Smtp-Source: ABdhPJxlWILyhhKTj/tAAqdadR2tdtBsPr+jYaD7gZ+n2slNGuHDLKio5IASXnRjZkIgis1bDLjidA== X-Received: by 2002:a17:902:ed83:b029:de:84d2:9ce8 with SMTP id e3-20020a170902ed83b02900de84d29ce8mr16777741plj.17.1612171857308; Mon, 01 Feb 2021 01:30:57 -0800 (PST) Received: from dhcp-10-123-20-36.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id c24sm16974232pjs.3.2021.02.01.01.30.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Feb 2021 01:30:56 -0800 (PST) From: Sreekanth Reddy To: martin.petersen@oracle.com Cc: linux-scsi@vger.kernel.org, sathya.prakash@broadcom.com, suganath-prabu.subramani@broadcom.com, kashyap.desai@broadcom.com, Sreekanth Reddy Subject: [PATCH] mpt3sas: Added support for shared host tagset for cpuhotplug Date: Mon, 1 Feb 2021 15:03:43 +0530 Message-Id: <20210201093343.29712-1-sreekanth.reddy@broadcom.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000e77d9505ba430277" Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org --000000000000e77d9505ba430277 Content-Transfer-Encoding: 8bit MPT Fusion adapters can steer completions to individual queues, and we now have support for shared host-wide tags. So we can enable multiqueue support for MPT fusion adapters. Once driver enable shared host-wide tags, cpu hotplug feature is also supported as it was enabled using below patchsets - commit bf0beec060 ("blk-mq: drain I/O when all CPUs in a hctx are offline") Currently the driver has provision to disable host-wide tags using "host_tagset_enable" module parameter. Once we do not have any major performance regression using host-wide tags, we will drop the hand-crafted interrupt affinity settings. Performance is also meeting the expectation - (used both none and mq-deadline scheduler) 24 Drive SSD on Aero with/without this patch can get 3.1M IOPs" Signed-off-by: Sreekanth Reddy --- drivers/scsi/mpt3sas/mpt3sas_base.c | 50 ++++++++++++++++++---------- drivers/scsi/mpt3sas/mpt3sas_base.h | 1 + drivers/scsi/mpt3sas/mpt3sas_scsih.c | 42 ++++++++++++++++++++++- 3 files changed, 75 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index f5582c8..84663d1 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -3648,25 +3648,16 @@ _base_get_msix_index(struct MPT3SAS_ADAPTER *ioc, base_mod64(atomic64_add_return(1, &ioc->total_io_cnt), ioc->reply_queue_count) : 0; - return ioc->cpu_msix_table[raw_smp_processor_id()]; -} + if (scmd && ioc->shost->nr_hw_queues > 1) { + u32 tag = blk_mq_unique_tag(scmd->request); -/** - * _base_sdev_nr_inflight_request -get number of inflight requests - * of a request queue. - * @q: request_queue object - * - * returns number of inflight request of a request queue. - */ -inline unsigned long -_base_sdev_nr_inflight_request(struct request_queue *q) -{ - struct blk_mq_hw_ctx *hctx = q->queue_hw_ctx[0]; + return blk_mq_unique_tag_to_hwq(tag) + + ioc->high_iops_queues; + } - return atomic_read(&hctx->nr_active); + return ioc->cpu_msix_table[raw_smp_processor_id()]; } - /** * _base_get_high_iops_msix_index - get the msix index of * high iops queues @@ -3686,7 +3677,8 @@ _base_get_high_iops_msix_index(struct MPT3SAS_ADAPTER *ioc, * reply queues in terms of batch count 16 when outstanding * IOs on the target device is >=8. */ - if (_base_sdev_nr_inflight_request(scmd->device->request_queue) > + + if (atomic_read(&scmd->device->device_busy) > MPT3SAS_DEVICE_HIGH_IOPS_DEPTH) return base_mod64(( atomic64_add_return(1, &ioc->high_iops_outstanding) / @@ -3739,8 +3731,23 @@ mpt3sas_base_get_smid_scsiio(struct MPT3SAS_ADAPTER *ioc, u8 cb_idx, struct scsi_cmnd *scmd) { struct scsiio_tracker *request = scsi_cmd_priv(scmd); - unsigned int tag = scmd->request->tag; u16 smid; + u32 tag, unique_tag; + + unique_tag = blk_mq_unique_tag(scmd->request); + tag = blk_mq_unique_tag_to_tag(unique_tag); + + /* + * store hw queue number corresponding to the tag, + * this hw queue number is used later to determine + * the unqiue_tag using below logic. This unique_tag + * is used to retrieve the scmd pointer corresponding + * to tag using scsi_host_find_tag() API, + * + * tag = smid - 1; + * unique_tag = ioc->io_queue_num[tag] << BLK_MQ_UNIQUE_TAG_BITS | tag; + */ + ioc->io_queue_num[tag] = blk_mq_unique_tag_to_hwq(unique_tag); smid = tag + 1; request->cb_idx = cb_idx; @@ -3831,6 +3838,7 @@ mpt3sas_base_free_smid(struct MPT3SAS_ADAPTER *ioc, u16 smid) mpt3sas_base_clear_st(ioc, st); _base_recovery_check(ioc); + ioc->io_queue_num[smid - 1] = 0; return; } @@ -5362,6 +5370,9 @@ _base_release_memory_pools(struct MPT3SAS_ADAPTER *ioc) kfree(ioc->chain_lookup); ioc->chain_lookup = NULL; } + + kfree(ioc->io_queue_num); + ioc->io_queue_num = NULL; } /** @@ -5772,6 +5783,11 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc) ioc_info(ioc, "internal(0x%p): depth(%d), start smid(%d)\n", ioc->internal, ioc->internal_depth, ioc->internal_smid)); + + ioc->io_queue_num = kcalloc(ioc->scsiio_depth, + sizeof(u16), GFP_KERNEL); + if (!ioc->io_queue_num) + goto out; /* * The number of NVMe page sized blocks needed is: * (((sg_tablesize * 8) - 1) / (page_size - 8)) + 1 diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h index 2def7a3..2eb94e4 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.h +++ b/drivers/scsi/mpt3sas/mpt3sas_base.h @@ -1439,6 +1439,7 @@ struct MPT3SAS_ADAPTER { spinlock_t scsi_lookup_lock; int pending_io_count; wait_queue_head_t reset_wq; + u16 *io_queue_num; /* PCIe SGL */ struct dma_pool *pcie_sgl_dma_pool; diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index c8b09a8..6973041 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -54,6 +54,7 @@ #include #include #include +#include #include #include "mpt3sas_base.h" @@ -168,6 +169,11 @@ MODULE_PARM_DESC(multipath_on_hba, "\t SAS 2.0 & SAS 3.0 HBA - This will be disabled,\n\t\t" "\t SAS 3.5 HBA - This will be enabled)"); +int host_tagset_enable = 1; +module_param(host_tagset_enable, int, 0444); +MODULE_PARM_DESC(host_tagset_enable, + "Shared host tagset enable/disable Default: enable(1)"); + /* raid transport support */ static struct raid_template *mpt3sas_raid_template; static struct raid_template *mpt2sas_raid_template; @@ -1743,10 +1749,12 @@ mpt3sas_scsih_scsi_lookup_get(struct MPT3SAS_ADAPTER *ioc, u16 smid) struct scsi_cmnd *scmd = NULL; struct scsiio_tracker *st; Mpi25SCSIIORequest_t *mpi_request; + u16 tag = smid - 1; if (smid > 0 && smid <= ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT) { - u32 unique_tag = smid - 1; + u32 unique_tag = + ioc->io_queue_num[tag] << BLK_MQ_UNIQUE_TAG_BITS | tag; mpi_request = mpt3sas_base_get_msg_frame(ioc, smid); @@ -11599,6 +11607,22 @@ scsih_scan_finished(struct Scsi_Host *shost, unsigned long time) return 1; } +/** + * scsih_map_queues - map reply queues with request queues + * @shost: SCSI host pointer + */ +static int scsih_map_queues(struct Scsi_Host *shost) +{ + struct MPT3SAS_ADAPTER *ioc = + (struct MPT3SAS_ADAPTER *)shost->hostdata; + + if (ioc->shost->nr_hw_queues == 1) + return 0; + + return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT], + ioc->pdev, ioc->high_iops_queues); +} + /* shost template for SAS 2.0 HBA devices */ static struct scsi_host_template mpt2sas_driver_template = { .module = THIS_MODULE, @@ -11666,6 +11690,7 @@ static struct scsi_host_template mpt3sas_driver_template = { .sdev_attrs = mpt3sas_dev_attrs, .track_queue_depth = 1, .cmd_size = sizeof(struct scsiio_tracker), + .map_queues = scsih_map_queues, }; /* raid transport support for SAS 3.0 HBA devices */ @@ -12028,6 +12053,21 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id) } else ioc->hide_drives = 0; + shost->host_tagset = 0; + shost->nr_hw_queues = 1; + + if (ioc->is_gen35_ioc && ioc->reply_queue_count > 1 && + host_tagset_enable && ioc->smp_affinity_enable) { + + shost->host_tagset = 1; + shost->nr_hw_queues = + 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