From patchwork Wed Jan 30 16:40:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joerg Roedel X-Patchwork-Id: 10788997 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 994D013BF for ; Wed, 30 Jan 2019 16:40:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8890E30071 for ; Wed, 30 Jan 2019 16:40:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 866432FF84; Wed, 30 Jan 2019 16:40:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2F4883008E for ; Wed, 30 Jan 2019 16:40:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732129AbfA3QkK (ORCPT ); Wed, 30 Jan 2019 11:40:10 -0500 Received: from 8bytes.org ([81.169.241.247]:35986 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731462AbfA3QkK (ORCPT ); Wed, 30 Jan 2019 11:40:10 -0500 Received: by theia.8bytes.org (Postfix, from userid 1000) id C5D9E5B8; Wed, 30 Jan 2019 17:40:08 +0100 (CET) From: Joerg Roedel To: "Michael S . Tsirkin" , Jason Wang , Konrad Rzeszutek Wilk , Christoph Hellwig Cc: Jens Axboe , virtualization@lists.linux-foundation.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jfehlig@suse.com, jon.grimm@amd.com, brijesh.singh@amd.com, joro@8bytes.org, jroedel@suse.de, Thomas.Lendacky@amd.com Subject: [PATCH 0/5 v5] Fix virtio-blk issue with SWIOTLB Date: Wed, 30 Jan 2019 17:40:02 +0100 Message-Id: <20190130164007.26497-1-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hi, here is the next version of this patch-set. Previous versions can be found here: V1: https://lore.kernel.org/lkml/20190110134433.15672-1-joro@8bytes.org/ V2: https://lore.kernel.org/lkml/20190115132257.6426-1-joro@8bytes.org/ V3: https://lore.kernel.org/lkml/20190123163049.24863-1-joro@8bytes.org/ V4: https://lore.kernel.org/lkml/20190129084342.26030-1-joro@8bytes.org/ The problem solved here is a limitation of the SWIOTLB implementation, which does not support allocations larger than 256kb. When the virtio-blk driver tries to read/write a block larger than that, the allocation of the dma-handle fails and an IO error is reported. Changes to v4 are: - Added Reviewed-by tags from Christoph - Added missing EXPORT_SYMBOL(_GPL) lines Please review. Thanks, Joerg Joerg Roedel (5): swiotlb: Introduce swiotlb_max_mapping_size() swiotlb: Add is_swiotlb_active() function dma: Introduce dma_max_mapping_size() virtio: Introduce virtio_max_dma_size() virtio-blk: Consider virtio_max_dma_size() for maximum segment size Documentation/DMA-API.txt | 8 ++++++++ drivers/block/virtio_blk.c | 10 ++++++---- drivers/virtio/virtio_ring.c | 11 +++++++++++ include/linux/dma-mapping.h | 16 ++++++++++++++++ include/linux/swiotlb.h | 11 +++++++++++ include/linux/virtio.h | 2 ++ kernel/dma/direct.c | 12 ++++++++++++ kernel/dma/swiotlb.c | 14 ++++++++++++++ 8 files changed, 80 insertions(+), 4 deletions(-) Tested-by: Tom Lendacky