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swiotlb: remove the tbl_dma_addr argument to swiotlb_tbl_map_single

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The tbl_dma_addr argument is used to check the DMA boundary for the
allocations, and thus needs to be a dma_addr_t.  swiotlb-xen instead
passed a physical address, which could lead to incorrect results for
strange offsets.  Fix this by removing the parameter entirely and hard
code the DMA address for io_tlb_start instead.

Fixes: 91ffe4ad53 ("swiotlb-xen: introduce phys_to_dma/dma_to_phys translations")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Christoph Hellwig 2020-10-23 08:33:09 +02:00 • committed by Konrad Rzeszutek Wilk
parent e9696d259d
commit fc0021aa34
4 changed files with 12 additions and 22 deletions
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10
include/linux/swiotlb.h
View file

@ -45,13 +45,9 @@ enum dma_sync_target {
SYNC_FOR_DEVICE = 1,
};
extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
dma_addr_t tbl_dma_addr,
phys_addr_t phys,
size_t mapping_size,
size_t alloc_size,
enum dma_data_direction dir,
unsigned long attrs);
phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys,
size_t mapping_size, size_t alloc_size,
enum dma_data_direction dir, unsigned long attrs);
extern void swiotlb_tbl_unmap_single(struct device *hwdev,
phys_addr_t tlb_addr,