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dmarc=none (p=none dis=none) header.from=tcd.ie Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DCC946E9DD; Wed, 9 Sep 2020 07:04:35 +0000 (UTC) Received: from mail-il1-x141.google.com (mail-il1-x141.google.com [IPv6:2607:f8b0:4864:20::141]) by gabe.freedesktop.org (Postfix) with ESMTPS id 264596E0B9 for ; Tue, 8 Sep 2020 22:43:30 +0000 (UTC) Received: by mail-il1-x141.google.com with SMTP id w8so494684ilj.8 for ; Tue, 08 Sep 2020 15:43:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tcd-ie.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=kP3fRBjvfm91Lgym+an8BHFQ2PuoWlJ3si63rQdbN8c=; b=cMCk0lKzNfxAMTO2UkKJ0lXqynPZojKcMVW8pVBD0mlICjkRQgjWFrGN9QLlhQkHwT /1hBT7NZs2Gr3ljH38g6Vgva0RGAIwKBL2lof8SnGTM7KVvDmeSc64CAB5ZYI51ye64A myig/VRQXeaoQ2s/61egtsT7H1YfnYF00beULBHNwfkxORoyxD3tpyeCI6Vv4fXW9aiB GZnJVGUOtP0w4hIktrh22UQPPwcXtPBeUim5uFhP4e860zMBj/sx+nCWMoR6wglWGBae T9aUpzVxoJnsq7orTcIcavPOpRMVeH9o5ow658uO6j6bws7ZRAzwVfQXC+uLjcXt9vgh eYDQ== 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=kP3fRBjvfm91Lgym+an8BHFQ2PuoWlJ3si63rQdbN8c=; b=mKALK3YnHgHZsvAJaZ6pP/+h7a/CqGGUec8nfSg3yLTrmKoC3ev5HJbD/V+xZx4Jlw xphKc/EDyEUSljh/musY2sxcLWHqWG5lXXmzjDhpzmnvpgONriioBU+8ZM8GYwYFNw7H +E9DVxEnbYn1wUaJJ7BzlYG5sIfIvLqq/CVzgzswOOjkVhte0Dx0bDRxIjAnUPMfsoWN a3i4u8PphedBRWy3aTfJoJStgy48+AfkLCyfOEgQNdry1Ca1skTbkZXxZdPr7gAHwv6j dIaO8FS5hr1RPkfSv56KR45zmNZjxAteiH873cI//fAvzTgmBjd/D8SjSHdAcds4+jM9 wHnA== X-Gm-Message-State: AOAM530t1UVfUecXnQ48v1Edvy3S8A/v6GLOpfMAckDQL8UneJPykj25 YGR+smfyDRGGYkQwdLUFpIZML8orelO8z7hxhyAxkw== X-Google-Smtp-Source: ABdhPJy2euDOe9gR5D2dH2jq/gUSw+Ds2//IpXgtG+LSuaTtkhuhiIiGtc0UENWkqIWHIiGMHapySfCTPJbwaFtJHWw= X-Received: by 2002:a92:9408:: with SMTP id c8mr928626ili.61.1599605010111; Tue, 08 Sep 2020 15:43:30 -0700 (PDT) MIME-Version: 1.0 References: <20191221150402.13868-1-murphyt7@tcd.ie> <465815ae-9292-f37a-59b9-03949cb68460@deltatee.com> <20200529124523.GA11817@infradead.org> <33137cfb-603c-86e8-1091-f36117ecfaf3@deltatee.com> <766525c3-4da9-6db7-cd90-fb4b82cd8083@deltatee.com> <60a82319-cbee-4cd1-0d5e-3c407cc51330@linux.intel.com> In-Reply-To: From: Tom Murphy Date: Tue, 8 Sep 2020 23:43:19 +0100 Message-ID: Subject: Re: [Intel-gfx] [PATCH 0/8] Convert the intel iommu driver to the dma-iommu api To: Tvrtko Ursulin X-Mailman-Approved-At: Wed, 09 Sep 2020 07:04:23 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, David Airlie , dri-devel@lists.freedesktop.org, Bjorn Andersson , Matthias Brugger , Julien Grall , Will Deacon , Marek Szyprowski , Jean-Philippe Brucker , linux-samsung-soc@vger.kernel.org, Marc Zyngier , Krzysztof Kozlowski , Jonathan Hunter , Christoph Hellwig , linux-rockchip@lists.infradead.org, Andy Gross , Gerald Schaefer , linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org, Robin Murphy , linux-mediatek@lists.infradead.org, linux-tegra@vger.kernel.org, Thomas Gleixner , virtualization@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, David Woodhouse , Cornelia Huck , Linux Kernel Mailing List , iommu@lists.linux-foundation.org, Kukjin Kim , Logan Gunthorpe Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Tue, 8 Sep 2020 at 16:56, Tvrtko Ursulin wrote: > > > On 08/09/2020 16:44, Logan Gunthorpe wrote: > > On 2020-09-08 9:28 a.m., Tvrtko Ursulin wrote: > >>> > >>> diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h > >>> b/drivers/gpu/drm/i915/i915 > >>> index b7b59328cb76..9367ac801f0c 100644 > >>> --- a/drivers/gpu/drm/i915/i915_scatterlist.h > >>> +++ b/drivers/gpu/drm/i915/i915_scatterlist.h > >>> @@ -27,13 +27,19 @@ static __always_inline struct sgt_iter { > >>> } __sgt_iter(struct scatterlist *sgl, bool dma) { > >>> struct sgt_iter s = { .sgp = sgl }; > >>> > >>> + if (sgl && !sg_dma_len(s.sgp)) > >> > >> I'd extend the condition to be, just to be safe: > >> if (dma && sgl && !sg_dma_len(s.sgp)) > >> > > > > Right, good catch, that's definitely necessary. > > > >>> + s.sgp = NULL; > >>> + > >>> if (s.sgp) { > >>> s.max = s.curr = s.sgp->offset; > >>> - s.max += s.sgp->length; > >>> - if (dma) > >>> + > >>> + if (dma) { > >>> + s.max += sg_dma_len(s.sgp); > >>> s.dma = sg_dma_address(s.sgp); > >>> - else > >>> + } else { > >>> + s.max += s.sgp->length; > >>> s.pfn = page_to_pfn(sg_page(s.sgp)); > >>> + } > >> > >> Otherwise has this been tested or alternatively how to test it? (How to > >> repro the issue.) > > > > It has not been tested. To test it, you need Tom's patch set without the > > last "DO NOT MERGE" patch: > > > > https://lkml.kernel.org/lkml/20200907070035.GA25114@infradead.org/T/ > > Tom, do you have a branch somewhere I could pull from? (Just being lazy > about downloading a bunch of messages from the archives.) I don't unfortunately. I'm working locally with poor internet. > > What GPU is in your Lenovo x1 carbon 5th generation and what > graphical/desktop setup I need to repro? Is this enough info?: $ lspci -vnn | grep VGA -A 12 00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo ThinkPad X1 Carbon 5th Gen [17aa:224f] Flags: bus master, fast devsel, latency 0, IRQ 148 Memory at eb000000 (64-bit, non-prefetchable) [size=16M] Memory at 60000000 (64-bit, prefetchable) [size=256M] I/O ports at e000 [size=64] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: [40] Vendor Specific Information: Len=0c Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [100] Process Address Space ID (PASID) Capabilities: [200] Address Translation Service (ATS) > > Regards, > > Tvrtko _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel