diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-02-13 08:01:05 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-18 12:41:02 +0100 |
| commit | 8617a5c5bc001e52c40d6b2ece78e8f332039217 (patch) | |
| tree | 79af57e1b85923c38b42c490fcc7b9c21cb32728 /arch/powerpc/kernel/dma.c | |
| parent | powerpc/dma: untangle vio_dma_mapping_ops from dma_iommu_ops (diff) | |
| download | linux-8617a5c5bc001e52c40d6b2ece78e8f332039217.tar.xz linux-8617a5c5bc001e52c40d6b2ece78e8f332039217.zip | |
powerpc/dma: handle iommu bypass in dma_iommu_ops
Add a new iommu_bypass flag to struct dev_archdata so that the dma_iommu
implementation can handle the direct mapping transparently instead of
switiching ops around. Setting of this flag is controlled by new
pci_controller_ops method.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/kernel/dma.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c index b1903ebb2e9c..e5db4d3f8bea 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -40,7 +40,7 @@ static u64 __maybe_unused get_pfn_limit(struct device *dev) return pfn; } -static int dma_nommu_dma_supported(struct device *dev, u64 mask) +int dma_nommu_dma_supported(struct device *dev, u64 mask) { #ifdef CONFIG_PPC64 u64 limit = get_dma_offset(dev) + (memblock_end_of_DRAM() - 1); @@ -178,9 +178,9 @@ int dma_nommu_mmap_coherent(struct device *dev, struct vm_area_struct *vma, vma->vm_page_prot); } -static int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction direction, - unsigned long attrs) +int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction direction, + unsigned long attrs) { struct scatterlist *sg; int i; @@ -209,7 +209,7 @@ static void dma_nommu_unmap_sg(struct device *dev, struct scatterlist *sgl, __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); } -static u64 dma_nommu_get_required_mask(struct device *dev) +u64 dma_nommu_get_required_mask(struct device *dev) { u64 end, mask; @@ -221,12 +221,9 @@ static u64 dma_nommu_get_required_mask(struct device *dev) return mask; } -static inline dma_addr_t dma_nommu_map_page(struct device *dev, - struct page *page, - unsigned long offset, - size_t size, - enum dma_data_direction dir, - unsigned long attrs) +dma_addr_t dma_nommu_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, unsigned long attrs) { if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) __dma_sync_page(page, offset, size, dir); |