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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 630EDECE588 for ; Wed, 16 Oct 2019 08:27:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 35BE62168B for ; Wed, 16 Oct 2019 08:27:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="VvfuWund" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391641AbfJPI1W (ORCPT ); Wed, 16 Oct 2019 04:27:22 -0400 Received: from mail-ed1-f66.google.com ([209.85.208.66]:40781 "EHLO mail-ed1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729709AbfJPI1W (ORCPT ); Wed, 16 Oct 2019 04:27:22 -0400 Received: by mail-ed1-f66.google.com with SMTP id v38so20603204edm.7 for ; Wed, 16 Oct 2019 01:27:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hIVVy6cMJGB/802PPmCv+d212rxtmpqIPcdcqOUFqaw=; b=VvfuWundF+ym1IvwwPUppv/LB2L6Z21+F3nWhnuESRQu/dDkWkWnxN0HOvt5o37maW N782ZuvA6/DkOtFY9J/AVKwZM2Nn7izbDjEItH/mnqH72fr1AqBGLm+iAvRBRvnsyG1Y Nx9XjRhpxAQnyGW6SpPO85uINTa/rxfc30qNE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hIVVy6cMJGB/802PPmCv+d212rxtmpqIPcdcqOUFqaw=; b=b9Ji4OaixAwD+Va8zXJnODvMzFheOkr2VraJ8UQoumHzzQA5osDU/gEjA4MSRRAX6U NyRy2tRAFMhKKkJLiiTSTL/vSG1+kDwGn0XhLyDEMvbZJKOZ82xjm0jvG8bfyNV6OrHl aEZtJ8LuGSjjy2EF2EqErd3l0T2ZeiIUfw+VWf9TvzTOoJ5zOeUa8DolXLJIXROVwLLM n3KvH3LWiKen91G8AFNkn1EHkTlHuhUwMUAdjNuU1p5nUg9i8uDljl/gw5yCTuJYZdTQ 1YwulrGPuuVz9nTQ3NigQ4t9WY9TxqzqxmLrtBHRdMsfvt7HXgWq2cpp4ip+5645UR8e shYw== X-Gm-Message-State: APjAAAXA5qJDznWElumszFid8mY+ljzUcas+AXM5/A5YHRtyQZgzDhg9 aFxnYETf3u+KU3K0xC9cyFd9Hg0kfOJMiA== X-Google-Smtp-Source: APXvYqxFvDr7mVQsdorw/55N1/wh/6iIYXaR/QN7jEm+5HrrZMs9Lr1EwNVHHtyq31VZzS815PN7hQ== X-Received: by 2002:a05:6402:12ca:: with SMTP id k10mr37852431edx.91.1571214439353; Wed, 16 Oct 2019 01:27:19 -0700 (PDT) Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com. [209.85.221.49]) by smtp.gmail.com with ESMTPSA id f26sm4044510edb.55.2019.10.16.01.27.16 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 16 Oct 2019 01:27:18 -0700 (PDT) Received: by mail-wr1-f49.google.com with SMTP id j11so26954482wrp.1 for ; Wed, 16 Oct 2019 01:27:16 -0700 (PDT) X-Received: by 2002:adf:f3c9:: with SMTP id g9mr1541264wrp.7.1571214436369; Wed, 16 Oct 2019 01:27:16 -0700 (PDT) MIME-Version: 1.0 References: <20190912094121.228435-1-tfiga@chromium.org> <20190917132305.GV3958@phenom.ffwll.local> <20191008100328.GN16989@phenom.ffwll.local> <20191008150435.GO16989@phenom.ffwll.local> <20191016061201.iinqjcw6trx5qztq@sirius.home.kraxel.org> In-Reply-To: <20191016061201.iinqjcw6trx5qztq@sirius.home.kraxel.org> From: Tomasz Figa Date: Wed, 16 Oct 2019 17:27:04 +0900 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [RFC PATCH] drm/virtio: Export resource handles via DMA-buf API To: Gerd Hoffmann Cc: Daniel Vetter , David Airlie , dri-devel , virtualization@lists.linux-foundation.org, Linux Kernel Mailing List , stevensd@chromium.org, =?UTF-8?Q?St=C3=A9phane_Marchesin?= , Zach Reizner , Keiichi Watanabe , Pawel Osciak Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 16, 2019 at 3:12 PM Gerd Hoffmann wrote: > > Hi, > > > up later when given a buffer index. But we would still need to make > > the DMA-buf itself importable. For virtio-gpu I guess that would mean > > returning an sg_table backed by the shadow buffer pages. > > The virtio-gpu driver in drm-misc-next supports dma-buf exports. Good to know, thanks. Best regards, Tomasz