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authorRobin Murphy <robin.murphy@arm.com>2016-09-12 19:14:00 +0300
committerWill Deacon <will.deacon@arm.com>2016-09-16 11:34:22 +0300
commitfade1ec055dc6b6373e7487906b7899b41d0c46f (patch)
treed8583918947bb5936ecf6e26f8b22598cca7e604 /include/linux/dma-iommu.h
parent44bb7e243bd4b4e5c79de2452cd9762582f58925 (diff)
downloadlinux-fade1ec055dc6b6373e7487906b7899b41d0c46f.tar.xz
iommu/dma: Avoid PCI host bridge windows
With our DMA ops enabled for PCI devices, we should avoid allocating IOVAs which a host bridge might misinterpret as peer-to-peer DMA and lead to faults, corruption or other badness. To be safe, punch out holes for all of the relevant host bridge's windows when initialising a DMA domain for a PCI device. CC: Marek Szyprowski <m.szyprowski@samsung.com> CC: Inki Dae <inki.dae@samsung.com> Reported-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/dma-iommu.h')
-rw-r--r--include/linux/dma-iommu.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 5ee806e41b5c..32c589062bd9 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -30,7 +30,8 @@ int iommu_get_dma_cookie(struct iommu_domain *domain);
void iommu_put_dma_cookie(struct iommu_domain *domain);
/* Setup call for arch DMA mapping code */
-int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, u64 size);
+int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
+ u64 size, struct device *dev);
/* General helpers for DMA-API <-> IOMMU-API interaction */
int dma_direction_to_prot(enum dma_data_direction dir, bool coherent);