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| author |   Hiroshi Doyu <hdoyu@nvidia.com> | 2012-06-25 14:23:54 +0300 |
|---|---|---|
| committer |   Joerg Roedel <joerg.roedel@amd.com> | 2012-06-25 13:50:28 +0200 |
| commit | 4e0ee78f2af96676c9dca898c13250f62c513058 (patch) | |
| tree | b6851b6678d8a99a6c158a18f210442e545f78c3 /include/linux/of_iommu.h | |
| parent | Linux 3.5-rc3 (diff) | |
| download | linux-dev-4e0ee78f2af96676c9dca898c13250f62c513058.tar.xz linux-dev-4e0ee78f2af96676c9dca898c13250f62c513058.zip | |
iommu: Add DMA window parser, of_get_dma_window()
This code was based on:
"arch/microblaze/kernel/prom_parse.c"
"arch/powerpc/kernel/prom_parse.c"
Can replace "of_parse_dma_window()" in the above. This supports
different formats flexibly. "prefix" can be configured if any. "busno"
and "index" are optionally specified. Set NULL and 0 if not used.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include/linux/of_iommu.h')
| -rw-r--r-- | include/linux/of_iommu.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h new file mode 100644 index 000000000000..51a560f34bca --- /dev/null +++ b/include/linux/of_iommu.h @@ -0,0 +1,21 @@ +#ifndef __OF_IOMMU_H +#define __OF_IOMMU_H + +#ifdef CONFIG_OF_IOMMU + +extern int of_get_dma_window(struct device_node *dn, const char *prefix, + int index, unsigned long *busno, dma_addr_t *addr, + size_t *size); + +#else + +static inline int of_get_dma_window(struct device_node *dn, const char *prefix, + int index, unsigned long *busno, dma_addr_t *addr, + size_t *size) +{ + return -EINVAL; +} + +#endif /* CONFIG_OF_IOMMU */ + +#endif /* __OF_IOMMU_H */ |