linux-kernel - Re: [PATCH v4 0/7] Convert the intel iommu driver to the dma-iommu api

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Date:   Tue, 29 Sep 2020 08:11:35 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>, Tom Murphy <murphyt7@....ie>,
        David Woodhouse <dwmw2@...radead.org>,
        Christoph Hellwig <hch@...radead.org>
Cc:     baolu.lu@...ux.intel.com, Ashok Raj <ashok.raj@...el.com>,
        Intel-gfx@...ts.freedesktop.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/7] Convert the intel iommu driver to the dma-iommu
 api

Hi Tvrtko,

On 9/28/20 5:44 PM, Tvrtko Ursulin wrote:
> 
> On 27/09/2020 07:34, Lu Baolu wrote:
>> Hi,
>>
>> The previous post of this series could be found here.
>>
>> https://lore.kernel.org/linux-iommu/20200912032200.11489-1-baolu.lu@linux.intel.com/ 
>>
>>
>> This version introduce a new patch [4/7] to fix an issue reported here.
>>
>> https://lore.kernel.org/linux-iommu/51a1baec-48d1-c0ac-181b-1fba92aa428d@linux.intel.com/ 
>>
>>
>> There aren't any other changes.
>>
>> Please help to test and review.
>>
>> Best regards,
>> baolu
>>
>> Lu Baolu (3):
>>    iommu: Add quirk for Intel graphic devices in map_sg
> 
> Since I do have patches to fix i915 to handle this, do we want to 
> co-ordinate the two and avoid having to add this quirk and then later 
> remove it? Or you want to go the staged approach?

I have no preference. It depends on which patch goes first. Let the
maintainers help here.

Best regards,
baolu

> 
> Regards,
> 
> Tvrtko
> 
>>    iommu/vt-d: Update domain geometry in iommu_ops.at(de)tach_dev
>>    iommu/vt-d: Cleanup after converting to dma-iommu ops
>>
>> Tom Murphy (4):
>>    iommu: Handle freelists when using deferred flushing in iommu drivers
>>    iommu: Add iommu_dma_free_cpu_cached_iovas()
>>    iommu: Allow the dma-iommu api to use bounce buffers
>>    iommu/vt-d: Convert intel iommu driver to the iommu ops
>>
>>   .../admin-guide/kernel-parameters.txt         |   5 -
>>   drivers/iommu/dma-iommu.c                     | 228 ++++-
>>   drivers/iommu/intel/Kconfig                   |   1 +
>>   drivers/iommu/intel/iommu.c                   | 901 +++---------------
>>   include/linux/dma-iommu.h                     |   8 +
>>   include/linux/iommu.h                         |   1 +
>>   6 files changed, 336 insertions(+), 808 deletions(-)
>>