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| author | Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> | 2009-06-04 00:16:04 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-11-13 18:10:37 +0100 |
| commit | f8ac04255dc8baa1c018e8028222d842efa56e6b (patch) | |
| tree | 4aedfaf3f4a2e5f0ffbc3280fa94e48e10ac9e38 /arch/mips/mm | |
| parent | da0bac33413b2888d3623dad3ad19ce76b688f07 (diff) | |
| download | lwn-f8ac04255dc8baa1c018e8028222d842efa56e6b.tar.gz lwn-f8ac04255dc8baa1c018e8028222d842efa56e6b.zip | |
MIPS: Add DMA declare coherent memory support
The ohci-sm501 driver requires dma_declare_coherent_memory(). It is used
by the driver's local memory allocation with dma_alloc_coherent().
Tested on TANBAC TB0287(VR4131 + SM501).
[Ralf: Fixed reject in dma-default.c and removed the entire #if 0'ed block
in dma-mapping.h instead of just the #if 0.]
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/dma-default.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c index 7e48e76148aa..9367e33fbd18 100644 --- a/arch/mips/mm/dma-default.c +++ b/arch/mips/mm/dma-default.c @@ -90,6 +90,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size, { void *ret; + if (dma_alloc_from_coherent(dev, size, dma_handle, &ret)) + return ret; + gfp = massage_gfp_flags(dev, gfp); ret = (void *) __get_free_pages(gfp, get_order(size)); @@ -122,6 +125,10 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle) { unsigned long addr = (unsigned long) vaddr; + int order = get_order(size); + + if (dma_release_from_coherent(dev, order, vaddr)) + return; plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL); |