From: Logan Gunthorpe <logang@deltatee.com>
To: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
Tom Murphy <murphyt7@tcd.ie>
Cc: kvm@vger.kernel.org, David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org,
Julien Grall <julien.grall@arm.com>,
Will Deacon <will@kernel.org>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
linux-samsung-soc@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Jonathan Hunter <jonathanh@nvidia.com>,
Christoph Hellwig <hch@infradead.org>,
linux-rockchip@lists.infradead.org,
Andy Gross <agross@kernel.org>,
Gerald Schaefer <gerald.schaefer@de.ibm.com>,
linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org,
intel-gfx@lists.freedesktop.org,
linux-mediatek@lists.infradead.org,
Matthias Brugger <matthias.bgg@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
virtualization@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>,
Cornelia Huck <cohuck@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
iommu@lists.linux-foundation.org, Kukjin Kim <kgene@kernel.org>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [Intel-gfx] [PATCH 0/8] Convert the intel iommu driver to the dma-iommu api
Date: Tue, 8 Sep 2020 09:44:24 -0600 [thread overview]
Message-ID: <e598fb31-ef7a-c2ee-8a54-bf62d50c480c@deltatee.com> (raw)
In-Reply-To: <60a82319-cbee-4cd1-0d5e-3c407cc51330@linux.intel.com>
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/
Thanks,
Logan
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next prev parent reply other threads:[~2020-09-08 15:44 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-21 15:03 [PATCH 0/8] Convert the intel iommu driver to the dma-iommu api Tom Murphy
2019-12-21 15:03 ` [PATCH 1/8] iommu/vt-d: clean up 32bit si_domain assignment Tom Murphy
2019-12-21 23:46 ` Arvind Sankar
2019-12-23 3:00 ` Lu Baolu
2019-12-21 15:03 ` [PATCH 2/8] iommu/vt-d: Use default dma_direct_* mapping functions for direct mapped devices Tom Murphy
2019-12-21 15:03 ` [PATCH 3/8] iommu/vt-d: Remove IOVA handling code from non-dma_ops path Tom Murphy
2020-03-20 6:30 ` Tom Murphy
2020-03-20 7:06 ` Lu Baolu
2019-12-21 15:03 ` [PATCH 4/8] iommu: Handle freelists when using deferred flushing in iommu drivers Tom Murphy
2019-12-21 15:03 ` [PATCH 5/8] iommu: Add iommu_dma_free_cpu_cached_iovas function Tom Murphy
2019-12-21 15:03 ` [PATCH 6/8] iommu: allow the dma-iommu api to use bounce buffers Tom Murphy
2019-12-24 10:20 ` kbuild test robot
2019-12-21 15:03 ` [PATCH 7/8] iommu/vt-d: Convert intel iommu driver to the iommu ops Tom Murphy
2019-12-21 15:04 ` [PATCH 8/8] DO NOT MERGE: iommu: disable list appending in dma-iommu Tom Murphy
2019-12-23 10:37 ` [PATCH 0/8] Convert the intel iommu driver to the dma-iommu api Jani Nikula
2019-12-23 11:29 ` Robin Murphy
2019-12-23 11:41 ` Jani Nikula
2020-03-20 6:28 ` Tom Murphy
2020-05-29 0:00 ` Logan Gunthorpe
2020-05-29 12:45 ` Christoph Hellwig
2020-05-29 19:05 ` Logan Gunthorpe
2020-05-29 21:11 ` Marek Szyprowski
2020-05-29 21:21 ` Logan Gunthorpe
2020-08-24 0:04 ` Tom Murphy
2020-08-26 18:26 ` Alex Deucher
2020-08-27 21:36 ` Logan Gunthorpe
2020-08-27 23:34 ` Tom Murphy
2020-09-03 20:26 ` Tom Murphy
2020-09-08 15:28 ` [Intel-gfx] " Tvrtko Ursulin
2020-09-08 15:44 ` Logan Gunthorpe [this message]
2020-09-08 15:56 ` Tvrtko Ursulin
2020-09-08 22:43 ` Tom Murphy
2020-09-09 9:16 ` Tvrtko Ursulin
2020-09-09 12:55 ` Tvrtko Ursulin
2020-09-10 13:33 ` Tom Murphy
2020-09-10 13:34 ` Tom Murphy
2020-08-26 18:14 ` Robin Murphy
2020-08-26 18:23 ` Tom Murphy
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