From: Christoph Hellwig <hch@infradead.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Tom Murphy <murphyt7@tcd.ie>,
David Woodhouse <dwmw2@infradead.org>,
Christoph Hellwig <hch@infradead.org>,
Ashok Raj <ashok.raj@intel.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Logan Gunthorpe <logang@deltatee.com>
Subject: Re: [PATCH v5 3/7] iommu: Allow the dma-iommu api to use bounce buffers
Date: Mon, 23 Nov 2020 10:08:16 +0000 [thread overview]
Message-ID: <20201123100816.GA26619@infradead.org> (raw)
In-Reply-To: <20201120101719.3172693-4-baolu.lu@linux.intel.com>
> + /*
> + * If both the physical buffer start address and size are
> + * page aligned, we don't need to use a bounce page.
> + */
> + if (IS_ENABLED(CONFIG_SWIOTLB) && dev_is_untrusted(dev) &&
> + iova_offset(iovad, phys | org_size)) {
> + aligned_size = iova_align(iovad, org_size);
> + phys = swiotlb_tbl_map_single(dev,
> + phys_to_dma(dev, io_tlb_start),
> + phys, org_size, aligned_size, dir, attrs);
swiotlb_tbl_map_single takes one less argument in 5.10-rc now.
next prev parent reply other threads:[~2020-11-23 10:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 10:17 [PATCH v5 0/7] Convert the intel iommu driver to the dma-iommu api Lu Baolu
2020-11-20 10:17 ` [PATCH v5 1/7] iommu: Handle freelists when using deferred flushing in iommu drivers Lu Baolu
2020-11-20 10:17 ` [PATCH v5 2/7] iommu: Add iommu_dma_free_cpu_cached_iovas() Lu Baolu
2020-11-20 10:17 ` [PATCH v5 3/7] iommu: Allow the dma-iommu api to use bounce buffers Lu Baolu
2020-11-23 10:08 ` Christoph Hellwig [this message]
2020-11-23 11:40 ` Lu Baolu
2020-11-23 11:47 ` Will Deacon
2020-11-23 11:56 ` Lu Baolu
2020-11-20 10:17 ` [PATCH v5 4/7] iommu: Add quirk for Intel graphic devices in map_sg Lu Baolu
2020-11-20 10:17 ` [PATCH v5 5/7] iommu/vt-d: Update domain geometry in iommu_ops.at(de)tach_dev Lu Baolu
2020-11-20 10:17 ` [PATCH v5 6/7] iommu/vt-d: Convert intel iommu driver to the iommu ops Lu Baolu
2020-11-20 10:17 ` [PATCH v5 7/7] iommu/vt-d: Cleanup after converting to dma-iommu ops Lu Baolu
2020-11-20 12:24 ` [PATCH v5 0/7] Convert the intel iommu driver to the dma-iommu api Chris Wilson
2020-11-20 13:39 ` Lu Baolu
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