From patchwork Sat Apr 11 12:09:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 227989 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 C582DC2BA2B for ; Sat, 11 Apr 2020 12:28:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AB7E206A1 for ; Sat, 11 Apr 2020 12:28:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586608104; bh=U39eJ5wTP9xAp1R1HEYgjXXVeuDHZ1woSRLnA78R++w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=VsiwwY1KuX8mALXGf0LK8EdGLbVdrOyF9evJVjpRDjRqYReS6mzdXE33t4grT2XYo QKDxX4gdCa3l02t5TSP7rLqMDRbSlwYS5icHzPKfs0yKjXkMwb4nE9/83O06moUORW sF/UlEOfBHT61R0adeUwpSuhj846femntO5KvWjw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726913AbgDKM2T (ORCPT ); Sat, 11 Apr 2020 08:28:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:45620 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727427AbgDKMMx (ORCPT ); Sat, 11 Apr 2020 08:12:53 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4599F21775; Sat, 11 Apr 2020 12:12:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607172; bh=U39eJ5wTP9xAp1R1HEYgjXXVeuDHZ1woSRLnA78R++w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tjQJz8JWej3xb//OGbF3MQp3K2RaHP6YgVPDg1PvGZV+hyDb4Qlj0SHHU4kPvnRx8 6DqZobWEN2vrxEgOl8eLkHWsxApcDSO/sQJK+KqdJiX+7zy5liZ24mNe6xbzcCjL9t giaCtoFZnVDf41ha4nS3e93I6cwFc2IL9F1ofeVs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stephen Boyd , Stephen Boyd , Jordan Crouse , Rob Clark , Sean Paul , Lee Jones Subject: [PATCH 4.9 29/32] drm/msm: stop abusing dma_map/unmap for cache Date: Sat, 11 Apr 2020 14:09:08 +0200 Message-Id: <20200411115422.593651374@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200411115418.455500023@linuxfoundation.org> References: <20200411115418.455500023@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rob Clark commit 0036bc73ccbe7e600a3468bf8e8879b122252274 upstream. Recently splats like this started showing up: WARNING: CPU: 4 PID: 251 at drivers/iommu/dma-iommu.c:451 __iommu_dma_unmap+0xb8/0xc0 Modules linked in: ath10k_snoc ath10k_core fuse msm ath mac80211 uvcvideo cfg80211 videobuf2_vmalloc videobuf2_memops vide CPU: 4 PID: 251 Comm: kworker/u16:4 Tainted: G W 5.2.0-rc5-next-20190619+ #2317 Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN23WW(V1.06) 10/25/2018 Workqueue: msm msm_gem_free_work [msm] pstate: 80c00005 (Nzcv daif +PAN +UAO) pc : __iommu_dma_unmap+0xb8/0xc0 lr : __iommu_dma_unmap+0x54/0xc0 sp : ffff0000119abce0 x29: ffff0000119abce0 x28: 0000000000000000 x27: ffff8001f9946648 x26: ffff8001ec271068 x25: 0000000000000000 x24: ffff8001ea3580a8 x23: ffff8001f95ba010 x22: ffff80018e83ba88 x21: ffff8001e548f000 x20: fffffffffffff000 x19: 0000000000001000 x18: 00000000c00001fe x17: 0000000000000000 x16: 0000000000000000 x15: ffff000015b70068 x14: 0000000000000005 x13: 0003142cc1be1768 x12: 0000000000000001 x11: ffff8001f6de9100 x10: 0000000000000009 x9 : ffff000015b78000 x8 : 0000000000000000 x7 : 0000000000000001 x6 : fffffffffffff000 x5 : 0000000000000fff x4 : ffff00001065dbc8 x3 : 000000000000000d x2 : 0000000000001000 x1 : fffffffffffff000 x0 : 0000000000000000 Call trace: __iommu_dma_unmap+0xb8/0xc0 iommu_dma_unmap_sg+0x98/0xb8 put_pages+0x5c/0xf0 [msm] msm_gem_free_work+0x10c/0x150 [msm] process_one_work+0x1e0/0x330 worker_thread+0x40/0x438 kthread+0x12c/0x130 ret_from_fork+0x10/0x18 ---[ end trace afc0dc5ab81a06bf ]--- Not quite sure what triggered that, but we really shouldn't be abusing dma_{map,unmap}_sg() for cache maint. Cc: Stephen Boyd Tested-by: Stephen Boyd Reviewed-by: Jordan Crouse Signed-off-by: Rob Clark Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20190630124735.27786-1-robdclark@gmail.com Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/msm/msm_gem.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -106,7 +106,7 @@ static struct page **get_pages(struct dr * because display controller, GPU, etc. are not coherent: */ if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) - dma_map_sg(dev->dev, msm_obj->sgt->sgl, + dma_sync_sg_for_device(dev->dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } @@ -124,7 +124,7 @@ static void put_pages(struct drm_gem_obj * GPU, etc. are not coherent: */ if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) - dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, + dma_sync_sg_for_cpu(obj->dev->dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL);