From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ipmail06.adl2.internode.on.net (ipmail06.adl2.internode.on.net [150.101.137.129]) by lists.ozlabs.org (Postfix) with ESMTP id 41myQz2cwxzDqww for ; Fri, 10 Aug 2018 18:07:39 +1000 (AEST) From: Alistair Popple To: Michael Ellerman Cc: Reza Arbab , linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH] powerpc/powernv: Add support for NPU2 relaxed-ordering mode Date: Fri, 10 Aug 2018 18:07:36 +1000 Message-ID: <4713418.DQXWlYYjMb@new-mexico> In-Reply-To: <87pnyq8zsj.fsf@concordia.ellerman.id.au> References: <1533698243-25972-1-git-send-email-arbab@linux.ibm.com> <87pnyq8zsj.fsf@concordia.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Friday, 10 August 2018 5:07:56 PM AEST Michael Ellerman wrote: > Reza Arbab writes: > > From: Alistair Popple > > > > Some device drivers support out of order access to GPU memory. This does > > not affect the CPU view of memory but it does affect the GPU view, so it > > should only be enabled once the GPU driver has requested it. Add APIs > > allowing a driver to do so. > > Do we have any indication which drivers we are expecting to use this? I believe there is an internal driver that required these but I'm not sure if there were any plans to make these available upstream or not. > I'd prefer not to merge a new API unless we at least have some idea > what's going to use it. Fair enough. Unfortunately I am not aware of users future plans for usage of this API. - Alistair > cheers >