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authorChristoph Hellwig <hch@lst.de>2020-09-01 14:59:45 +0300
committerChristoph Hellwig <hch@lst.de>2020-09-25 07:20:47 +0300
commitde7cf917768f438aae6d2f4e9bced3739f15f5b6 (patch)
treeded43ac607a6825a0e1d73e1b199568b005f7905 /include/linux/dma-mapping.h
parentefa70f2fdc842e63a0a13223e0e83cedcc2117f1 (diff)
downloadlinux-de7cf917768f438aae6d2f4e9bced3739f15f5b6.tar.xz
dma-mapping: add new {alloc,free}_noncoherent dma_map_ops methods
This will allow IOMMU drivers to allocate non-contigous memory and return a vmapped virtual address. Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/dma-mapping.h')
-rw-r--r--include/linux/dma-mapping.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 4b9b1d64f5ec..7c77cd6f3604 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -74,6 +74,11 @@ struct dma_map_ops {
gfp_t gfp);
void (*free_pages)(struct device *dev, size_t size, struct page *vaddr,
dma_addr_t dma_handle, enum dma_data_direction dir);
+ void* (*alloc_noncoherent)(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, enum dma_data_direction dir,
+ gfp_t gfp);
+ void (*free_noncoherent)(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, enum dma_data_direction dir);
int (*mmap)(struct device *, struct vm_area_struct *,
void *, dma_addr_t, size_t,
unsigned long attrs);