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=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 C3CB3C28CC5 for ; Wed, 5 Jun 2019 19:10:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A19672075C for ; Wed, 5 Jun 2019 19:10:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="hZ8MIFGc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726922AbfFETJb (ORCPT ); Wed, 5 Jun 2019 15:09:31 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:48690 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726637AbfFETJa (ORCPT ); Wed, 5 Jun 2019 15:09:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=AE7g989qIO1VkopksP3RSlALL0SU6gZzEPZFVDK3h6g=; b=hZ8MIFGcrOz/Vqrtdj0cEeO+RW rlhkacZFkVFvFSik93oBnuuJJgxSt8Jxs8Gg6t0gJfCcf3N4IRga5hDuyw47FRdJa9H5Y3XI5A+By uaB29+VcBqDZ/AGq7+o1Coz5x8V7ulIklnzC3zym3Hz6r0A4QAknVC1294KixPRfw3MLPfGGsYNjZ wdSoljVPRL7SS/KfFTZmrI8NBIosnNsY9SwI1J5Y3m6u5/vGvU8RNZ/zoR1BJhRtyu1SaxhJ98HWY hF/o8M5J8UFSjCHu0Q770Bchg1OLtXK22vwknekIgTSpieGddGwb3wOWFuBMeXY47TwSdRLFm2zuf 2nHKjAOg==; Received: from 089144193064.atnat0002.highway.a1.net ([89.144.193.64] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hYbHh-0005zB-51; Wed, 05 Jun 2019 19:09:17 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Sebastian Ott , Sagi Grimberg , Max Gurtovoy , Bart Van Assche , Ulf Hansson , Alan Stern , Oliver Neukum , linux-block@vger.kernel.org, linux-rdma@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, megaraidlinux.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com, linux-hyperv@vger.kernel.org, linux-usb@vger.kernel.org, usb-storage@lists.one-eyed-alien.net, linux-kernel@vger.kernel.org Subject: [PATCH 10/13] megaraid_sas: set virt_boundary_mask in the scsi host Date: Wed, 5 Jun 2019 21:08:33 +0200 Message-Id: <20190605190836.32354-11-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190605190836.32354-1-hch@lst.de> References: <20190605190836.32354-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org This ensures all proper DMA layer handling is taken care of by the SCSI midlayer. Note that the effect is global, as the IOMMU merging is based off a paramters in struct device. We could still turn if off if no PCIe devices are present, but I don't know how to find that out. Also remove the bogus nomerges flag, merges do take the virt_boundary into account. Signed-off-by: Christoph Hellwig --- drivers/scsi/megaraid/megaraid_sas_base.c | 46 +++++---------------- drivers/scsi/megaraid/megaraid_sas_fusion.c | 7 ++++ 2 files changed, 18 insertions(+), 35 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 3dd1df472dc6..20b3b3f8bc16 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -1870,39 +1870,6 @@ void megasas_set_dynamic_target_properties(struct scsi_device *sdev, } } -/* - * megasas_set_nvme_device_properties - - * set nomerges=2 - * set virtual page boundary = 4K (current mr_nvme_pg_size is 4K). - * set maximum io transfer = MDTS of NVME device provided by MR firmware. - * - * MR firmware provides value in KB. Caller of this function converts - * kb into bytes. - * - * e.a MDTS=5 means 2^5 * nvme page size. (In case of 4K page size, - * MR firmware provides value 128 as (32 * 4K) = 128K. - * - * @sdev: scsi device - * @max_io_size: maximum io transfer size - * - */ -static inline void -megasas_set_nvme_device_properties(struct scsi_device *sdev, u32 max_io_size) -{ - struct megasas_instance *instance; - u32 mr_nvme_pg_size; - - instance = (struct megasas_instance *)sdev->host->hostdata; - mr_nvme_pg_size = max_t(u32, instance->nvme_page_size, - MR_DEFAULT_NVME_PAGE_SIZE); - - blk_queue_max_hw_sectors(sdev->request_queue, (max_io_size / 512)); - - blk_queue_flag_set(QUEUE_FLAG_NOMERGES, sdev->request_queue); - blk_queue_virt_boundary(sdev->request_queue, mr_nvme_pg_size - 1); -} - - /* * megasas_set_static_target_properties - * Device property set by driver are static and it is not required to be @@ -1961,8 +1928,10 @@ static void megasas_set_static_target_properties(struct scsi_device *sdev, max_io_size_kb = le32_to_cpu(instance->tgt_prop->max_io_size_kb); } - if (instance->nvme_page_size && max_io_size_kb) - megasas_set_nvme_device_properties(sdev, (max_io_size_kb << 10)); + if (instance->nvme_page_size && max_io_size_kb) { + blk_queue_max_hw_sectors(sdev->request_queue, + (max_io_size_kb << 10) / 512); + } scsi_change_queue_depth(sdev, device_qd); @@ -6258,6 +6227,7 @@ static int megasas_start_aen(struct megasas_instance *instance) static int megasas_io_attach(struct megasas_instance *instance) { struct Scsi_Host *host = instance->host; + u32 nvme_page_size = instance->nvme_page_size; /* * Export parameters required by SCSI mid-layer @@ -6298,6 +6268,12 @@ static int megasas_io_attach(struct megasas_instance *instance) host->max_lun = MEGASAS_MAX_LUN; host->max_cmd_len = 16; + if (nvme_page_size) { + if (nvme_page_size > MR_DEFAULT_NVME_PAGE_SIZE) + nvme_page_size = MR_DEFAULT_NVME_PAGE_SIZE; + host->virt_boundary_mask = nvme_page_size - 1; + } + /* * Notify the mid-layer about the new controller */ diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 4dfa0685a86c..a9ff3a648e7b 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -1935,6 +1935,13 @@ megasas_is_prp_possible(struct megasas_instance *instance, build_prp = true; } +/* + * XXX: All the code following should go away. The block layer guarantees + * merging according to the virt boundary. And while we might have had some + * issues with that in the past we fixed them, and any new bug should be fixed + * in the core code as well. + */ + /* * Below code detects gaps/holes in IO data buffers. * What does holes/gaps mean? -- 2.20.1