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=-20.2 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,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 7445AC63777 for ; Tue, 1 Dec 2020 01:30:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0478021527 for ; Tue, 1 Dec 2020 01:30:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="FhgNlKph" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388686AbgLABaU (ORCPT ); Mon, 30 Nov 2020 20:30:20 -0500 Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:14712 "EHLO hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726400AbgLABaU (ORCPT ); Mon, 30 Nov 2020 20:30:20 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Mon, 30 Nov 2020 17:29:39 -0800 Received: from localhost (172.20.13.39) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 1 Dec 2020 01:29:38 +0000 From: Alistair Popple To: CC: , , , , Alistair Popple Subject: [PATCH] drm/nouveau/svm: Only map migrating pages Date: Tue, 1 Dec 2020 12:29:36 +1100 Message-ID: <20201201012936.9046-1-apopple@nvidia.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL107.nvidia.com (172.20.187.13) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1606786179; bh=U2FLmjEm94rPLnGodJhcYwZBdpdbhTX9UL1a65sI3bI=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:MIME-Version: Content-Transfer-Encoding:Content-Type:X-Originating-IP: X-ClientProxiedBy; b=FhgNlKphVf9oOOynU0gD9eLLDsorI+EotpUqSf8jOBf+GNKe/PnzOUBfizzEXTZ6I Nk2lDdBcBE7zxrOZjniP9rtuTSUCFME1er5nTEM75pUcTtcTQ3QLnqhLm2q+nsdqXN kF3WgO2Lohicz68fGDinflQYxSGiXwk56VWviw1uhu0Xhkmb3WKpFyyLBD/aJqBeKz ABVnrPp+jkKOOTGRzo36dPdcqFVHkGM5kOCbANft6wiXJiurj5C6YQ0VBGC5S5t4M1 VHKDQEHYji1fG2224bbE6e5isZWjW4gxqO97RAZ9rGUmjL7AsUVv3P5l6Whqtf02V+ OyIp/3rhTN6Uw== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Only pages which were actually migrated should be mapped on the GPU. migrate_vma_pages() clears MIGRATE_PFN_MIGRATE in the src_pfn array, so test this prior to mapping the pages on the GPU. If any pages failed to migrate don't install any mappings - the GPU will demand fault any as required. Fixes: e3d8b0890469 ("drm/nouveau/svm: map pages after migration") Signed-off-by: Alistair Popple --- drivers/gpu/drm/nouveau/nouveau_dmem.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouve= au/nouveau_dmem.c index 92987daa5e17..a2169644f114 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -618,8 +618,9 @@ static void nouveau_dmem_migrate_chunk(struct nouveau_d= rm *drm, dma_addr_t *dma_addrs, u64 *pfns) { struct nouveau_fence *fence; - unsigned long addr =3D args->start, nr_dma =3D 0, i; + unsigned long addr =3D args->start, nr_dma =3D 0, i, npages; =20 + npages =3D (args->end - args->start) >> PAGE_SHIFT; for (i =3D 0; addr < args->end; i++) { args->dst[i] =3D nouveau_dmem_migrate_copy_one(drm, svmm, args->src[i], dma_addrs + nr_dma, pfns + i); @@ -631,7 +632,16 @@ static void nouveau_dmem_migrate_chunk(struct nouveau_= drm *drm, nouveau_fence_new(drm->dmem->migrate.chan, false, &fence); migrate_vma_pages(args); nouveau_dmem_fence_done(&fence); - nouveau_pfns_map(svmm, args->vma->vm_mm, args->start, pfns, i); + + for (i =3D 0; i < npages; i++) + if (!(args->src[i] & MIGRATE_PFN_MIGRATE)) + break; + + /* If all pages were migrated successfully map them on the GPU. If any + * failed just let the GPU fault to create the mapping. + */ + if (i =3D=3D npages) + nouveau_pfns_map(svmm, args->vma->vm_mm, args->start, pfns, npages); =20 while (nr_dma--) { dma_unmap_page(drm->dev->dev, dma_addrs[nr_dma], PAGE_SIZE, --=20 2.20.1