diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2016-09-12 17:14:00 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-09-16 09:34:22 +0100 |
| commit | fade1ec055dc6b6373e7487906b7899b41d0c46f (patch) | |
| tree | d8583918947bb5936ecf6e26f8b22598cca7e604 /include/linux/dma-iommu.h | |
| parent | 44bb7e243bd4b4e5c79de2452cd9762582f58925 (diff) | |
| download | lwn-fade1ec055dc6b6373e7487906b7899b41d0c46f.tar.gz lwn-fade1ec055dc6b6373e7487906b7899b41d0c46f.zip | |
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.h | 3 |
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); |