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| author | Christoph Hellwig <hch@lst.de> | 2020-09-01 13:34:33 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-09-25 06:20:47 +0200 |
| commit | efa70f2fdc842e63a0a13223e0e83cedcc2117f1 (patch) | |
| tree | ef21550627a0a50be9edf10c53542f9c59a61896 /drivers/iommu | |
| parent | dma-mapping: remove dma_cache_sync (diff) | |
| download | linux-efa70f2fdc842e63a0a13223e0e83cedcc2117f1.tar.xz linux-efa70f2fdc842e63a0a13223e0e83cedcc2117f1.zip | |
dma-mapping: add a new dma_alloc_pages API
This API is the equivalent of alloc_pages, except that the returned memory
is guaranteed to be DMA addressable by the passed in device. The
implementation will also be used to provide a more sensible replacement
for DMA_ATTR_NON_CONSISTENT flag.
Additionally dma_alloc_noncoherent is switched over to use dma_alloc_pages
as its backend.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> (MIPS part)
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/dma-iommu.c | 2 | ||||
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 5141d49a046b..00a5b49248e3 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1120,6 +1120,8 @@ static unsigned long iommu_dma_get_merge_boundary(struct device *dev) static const struct dma_map_ops iommu_dma_ops = { .alloc = iommu_dma_alloc, .free = iommu_dma_free, + .alloc_pages = dma_common_alloc_pages, + .free_pages = dma_common_free_pages, .mmap = iommu_dma_mmap, .get_sgtable = iommu_dma_get_sgtable, .map_page = iommu_dma_map_page, diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ed5c57e96e8b..2c426dbdf17f 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -3712,6 +3712,8 @@ static const struct dma_map_ops intel_dma_ops = { .dma_supported = dma_direct_supported, .mmap = dma_common_mmap, .get_sgtable = dma_common_get_sgtable, + .alloc_pages = dma_common_alloc_pages, + .free_pages = dma_common_free_pages, .get_required_mask = intel_get_required_mask, }; @@ -3965,6 +3967,8 @@ static const struct dma_map_ops bounce_dma_ops = { .sync_sg_for_device = bounce_sync_sg_for_device, .map_resource = bounce_map_resource, .unmap_resource = bounce_unmap_resource, + .alloc_pages = dma_common_alloc_pages, + .free_pages = dma_common_free_pages, .dma_supported = dma_direct_supported, }; |