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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 93E7FC282DA for ; Wed, 17 Apr 2019 13:59:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 62EC8206BA for ; Wed, 17 Apr 2019 13:59:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d3aCrIZf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732355AbfDQN7z (ORCPT ); Wed, 17 Apr 2019 09:59:55 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:46316 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731454AbfDQN7z (ORCPT ); Wed, 17 Apr 2019 09:59:55 -0400 Received: by mail-wr1-f68.google.com with SMTP id t17so32051170wrw.13; Wed, 17 Apr 2019 06:59:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=reply-to:subject:to:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=w6bSU+aoJzkpTqgevvPOdjffpkj+vw/h7/N6upl4I1E=; b=d3aCrIZfC1c8ZNp5KfpUfaTCTrPdWUzFNK5X/zD5gIjtyHC98BsuDA2yMulK00wt3k DQgv8vCihflozMNGhNhP2kjts5Fb6VCJc98bQHzAqUY+/1crXAy3kW4ZqmDuUksOmWdV 1mZuh8Pg+6TnpOthNE/lMrhGo7Wj6Pt8DB7JdIhhTAc408V0fRbycArUbciJ62Ay5dB/ jWuIFmXj8hWO1ZiM5N6BaqBps3zofU+q5QFHZ0alIrACpTwiEVtgZv312QcNUF5W1Fiu i2k/MoouE3CUIdnwr6gS3sFbA506h6j604EO8OFkRcwp+bw8QAMzQU9RMoO21UGoipX5 7LMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:subject:to:references:from:message-id :date:user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=w6bSU+aoJzkpTqgevvPOdjffpkj+vw/h7/N6upl4I1E=; b=pnsI4GUuuE+7DOWwL7ym4f8JQPbA4a739W6sgJY2UgIIW5f5fi7YKI0k1RNtxr8sGU zrvpHBeyc5v9/D+jxeljmPgPUaZ2aTlSAZjPrS5drMta0OrOoQ/QyhEAOgg/Uorkf7v3 pBGtUq6EXPcVccOGoEFBSBCSR74jCy34JrIol2Wo6qxfbisrLcf5m89Ze6qjyaMAd3Zy TiUpaHnNXj0VIzogLomP5QGlV8FRGCMgSln/cw0HakAdg9D50KrdNQ1QMp4n9tJwmcmj m9t1unV3jdbs1Ndk4iRjlzGucDr2ferkB8zjtg6AoD8lpr4Psn3a3MKsIgAu6KQwLid1 R00w== X-Gm-Message-State: APjAAAWnfg13DrvdcQtMa0j0A6CsG/qoI7tMnskx2DDMnwENrsZoWU1B dY4BTMfB1j7mAnI+Rkw0Vtp9TMJL X-Google-Smtp-Source: APXvYqxlErQCHkXeMFNHjqw8q0+/CNg+qXFS1R46qIh3OUvsusNL0r4WGWDKqjtqh1Xw6lULjaPY8w== X-Received: by 2002:adf:e790:: with SMTP id n16mr19803632wrm.292.1555509593857; Wed, 17 Apr 2019 06:59:53 -0700 (PDT) Received: from ?IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7? ([2a02:908:1252:fb60:be8a:bd56:1f94:86e7]) by smtp.gmail.com with ESMTPSA id z18sm84325274wrr.90.2019.04.17.06.59.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 17 Apr 2019 06:59:53 -0700 (PDT) Reply-To: christian.koenig@amd.com Subject: Re: dynamic DMA-buf sharing between devices To: Chunming Zhou , "sumit.semwal@linaro.org" , "linux-media@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "linaro-mm-sig@lists.linaro.org" , "linux-kernel@vger.kernel.org" , "amd-gfx@lists.freedesktop.org" References: <20190416183841.1577-1-christian.koenig@amd.com> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <04558379-9788-bbcc-5c64-7fa9ad92f60d@gmail.com> Date: Wed, 17 Apr 2019 15:59:51 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On top of those I have 6 more patches in the pipeline to enable VRAM P2P with DMA-buf. So that is not the end of the patch set :) Christian. Am 17.04.19 um 15:52 schrieb Chunming Zhou: > Thanks Christian, great job. I will verify it this week when I finish my > current work on hand. > > -David > > 在 2019/4/17 2:38, Christian König wrote: >> Hi everybody, >> >> core idea in this patch set is that DMA-buf importers can now provide an optional invalidate callback. Using this callback and the reservation object exporters can now avoid pinning DMA-buf memory for a long time while sharing it between devices. >> >> I've already send out an older version roughly a year ago, but didn't had time to further look into cleaning this up. >> >> The last time a major problem was that we would had to fix up all drivers implementing DMA-buf at once. >> >> Now I avoid this by allowing mappings to be cached in the DMA-buf attachment and so driver can optionally move over to the new interface one by one. >> >> This is also a prerequisite to my patchset enabling sharing of device memory with DMA-buf. >> >> Please review and/or comment, >> Christian. >> >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel