Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp423210ybt; Wed, 24 Jun 2020 02:39:42 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwlh8Idct1NapemGw2d5aT+JjcSKUJNa+BZbnqSrViGw/5jVE9bn1D29eXcyDOnaO2Xc4lL X-Received: by 2002:a17:906:3154:: with SMTP id e20mr25108145eje.171.1592991582498; Wed, 24 Jun 2020 02:39:42 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1592991582; cv=none; d=google.com; s=arc-20160816; b=ZdqvXiQaqwvZxVo6Q62HzOn/CybnNS/n1nMU6teQJuQ+rAQ18bmt0iNeYQ3FkN17Ik yiW9T2nS2XSby2y1NMV2iv622tzWaBYGGqG/mbuMvfL/Fln22TXTZrW97y3/+uMuT6Ob ePOhMbKxq2uuaNaaGYeHujD7FZdgQWEbUIWXx9yqmuEzplIwzvFq6xtnmv2j0JPR0VII GPNjx8Vhq59TEQyocWFAtVL1pJTsJjbELkK7XoLXKrzbHSHc6SE97MlAk/B0bhCcFJ0L FCGH4ZEbmdZ3tjim6UjUIpecw8A70voobwXz9yKcECesB3hrPBmkrS8ItI/Mgc1q/ejE e57g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=Fq0Fj67YUS9t7S4P+SvQVHoB0eJKx05Y61TW77jO85Q=; b=jVLlC6ZbR43JQ17mQkDBzNGL1ERKt2Y37OjN3AL1bqDxGNNUfQ5HRV/1jIFoTSVStq PJ+Del7Bb8KBAi1vzeMHe+WMN1pOqIHYiFxVzqoxgrPrdZF2AkobySvh2yRL64cBZcyY hcHMjrY/LTHik4sqM9Di/HoZpjB5oJKsBuQFAo2m6MK1Q9/LMLEW3qanbg5PYKU5E3C7 2Bonpf8r1pWe0wzVHxuevEL2Sx6kO0Gos0VlTjshxvgSRSeYE648NDUUE7aAls+RxBd0 eilC1qswvziK1HKESk58GZlt0WflQ+8A25rCeSGvTwwAmWtE4JHCzGQmqpIT5IkU1Bhb A0Fg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=X3Qh6RON; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id y13si14190681ede.144.2020.06.24.02.39.19; Wed, 24 Jun 2020 02:39:42 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=X3Qh6RON; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389566AbgFXJiH (ORCPT + 99 others); Wed, 24 Jun 2020 05:38:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:43310 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388998AbgFXJiH (ORCPT ); Wed, 24 Jun 2020 05:38:07 -0400 Received: from localhost (unknown [171.61.66.58]) (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 CA8D720885; Wed, 24 Jun 2020 09:38:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592991486; bh=M17U8InxXE8LD18Sq7wr8yn7Yy1fVJiTNteQrj4tOC8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=X3Qh6RONQSKJIXovrL6/xEMD1+9sjPy3PjDngBbFY878WMHZ7n0WhKV9ICBsPQeBx cK+gzDnn044pdcWiud7CZ0NGtQwTEOA+2mh/XxGezkceR5PZUvu5RlkSbmAuSXRtve zLowjzeJdIz7m2kL/u5QyQoQRJjcRl08OvsDqYmc= Date: Wed, 24 Jun 2020 15:08:00 +0530 From: Vinod Koul To: Thomas Ruf Cc: Federico Vaga , Dave Jiang , Dan Williams , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: DMA Engine: Transfer From Userspace Message-ID: <20200624093800.GV2324254@vkoul-mobl> References: <5614531.lOV4Wx5bFT@harkonnen> <20200621072457.GA2324254@vkoul-mobl> <20200621203634.y3tejmh6j4knf5iz@cwe-513-vol689.cern.ch> <20200622044733.GB2324254@vkoul-mobl> <419762761.402939.1592827272368@mailbusiness.ionos.de> <20200622155440.GM2324254@vkoul-mobl> <1835214773.354594.1592843644540@mailbusiness.ionos.de> <2077253476.601371.1592991035969@mailbusiness.ionos.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2077253476.601371.1592991035969@mailbusiness.ionos.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 24-06-20, 11:30, Thomas Ruf wrote: > To make it short - i have two questions: > - what are the chances to revive DMA_SG? 100%, if we have a in-kernel user > - what are the chances to get my driver for memcpy like transfers from > user space using DMA_SG upstream? ("dma-sg-proxy") pretty bleak IMHO. -- ~Vinod