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| author | Christoph Hellwig <hch@lst.de> | 2018-09-11 08:55:28 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-09-20 09:01:16 +0200 |
| commit | 58b0440663ec11372befb8ead0ee7099d8878590 (patch) | |
| tree | c613ed22ad229e6612d8c71888d2bb8139163ea8 /arch/mips/jazz | |
| parent | bc3ec75de5452db59b683487867ba562b950708a (diff) | |
| download | linux-58b0440663ec11372befb8ead0ee7099d8878590.tar.bz2 | |
dma-mapping: consolidate the dma mmap implementations
The only functional differences (modulo a few missing fixes in the arch
code) is that architectures without coherent caches need a hook to
convert a virtual or dma address into a pfn, given that we don't have
the kernel linear mapping available for the otherwise easy virt_to_page
call. As a side effect we can support mmap of the per-device coherent
area even on architectures not providing the callback, and we make
previous dangerous default methods dma_common_mmap actually save for
non-coherent architectures by rejecting it without the right helper.
In addition to that we need a hook so that some architectures can
override the protection bits when mmaping a dma coherent allocations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com> # MIPS parts
Diffstat (limited to 'arch/mips/jazz')
| -rw-r--r-- | arch/mips/jazz/jazzdma.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c index bb49dfa1a9a3..0a0aaf39fd16 100644 --- a/arch/mips/jazz/jazzdma.c +++ b/arch/mips/jazz/jazzdma.c @@ -682,7 +682,6 @@ static int jazz_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) const struct dma_map_ops jazz_dma_ops = { .alloc = jazz_dma_alloc, .free = jazz_dma_free, - .mmap = arch_dma_mmap, .map_page = jazz_dma_map_page, .unmap_page = jazz_dma_unmap_page, .map_sg = jazz_dma_map_sg, |