linux/kernel/dma/ops_helpers.c, branch v6.7

dma-mapping: handle vmalloc addresses in dma_common_{mmap,get_sgtable}

2021-07-16T09:30:26Z

xen-swiotlb can use vmalloc backed addresses for dma coherent allocations and uses the common helpers. Properly handle them to unbreak Xen on ARM platforms. Fixes: 1b65c4e5a9af ("swiotlb-xen: use xen_alloc/free_coherent_pages") Signed-off-by: Roman Skakun Reviewed-by: Andrii Anisov [hch: split the patch, renamed the helpers] Signed-off-by: Christoph Hellwig

dma-mapping: merge into

2020-10-06T05:07:06Z

Move more nitty gritty DMA implementation details into the common internal header. Signed-off-by: Christoph Hellwig

dma-mapping: merge into

2020-10-06T05:07:04Z

Merge dma-contiguous.h into dma-map-ops.h, after removing the comment describing the contiguous allocator into kernel/dma/contigous.c. Signed-off-by: Christoph Hellwig

dma-mapping: split

2020-10-06T05:07:03Z

Split out all the bits that are purely for dma_map_ops implementations and related code into a new header so that they don't get pulled into all the drivers. That also means the architecture specific is not pulled in by any more, which leads to a missing includes that were pulled in by the x86 or arm versions in a few not overly portable drivers. Signed-off-by: Christoph Hellwig

dma-mapping: add a new dma_alloc_pages API

2020-09-25T04:20:47Z

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 Acked-by: Thomas Bogendoerfer (MIPS part)

dma-mapping: move dma_common_{mmap,get_sgtable} out of mapping.c

2020-09-11T07:14:56Z

Add a new file that contains helpers for misc DMA ops, which is only built when CONFIG_DMA_OPS is set. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy