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author | 2010-02-08 12:13:10 +0100 | |
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committer | 2010-03-11 14:08:33 +0100 | |
commit | d79f3b06a9e40b382bd5d5ae8dea9b3210eda9ce (patch) | |
tree | d0e49b835c40cde89f8af1b641df6baf0b16dd82 /arch/microblaze/kernel/dma.c | |
parent | microblaze: Move cache function to cache.c (diff) | |
download | linux-d79f3b06a9e40b382bd5d5ae8dea9b3210eda9ce.tar.gz linux-d79f3b06a9e40b382bd5d5ae8dea9b3210eda9ce.tar.bz2 linux-d79f3b06a9e40b382bd5d5ae8dea9b3210eda9ce.zip |
microblaze: Preliminary support for dma drivers
I found several problems for ll_temac driver and on system with WB.
This early fix should fix it. I will clean this patch before I will add
it to mainline
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel/dma.c')
-rw-r--r-- | arch/microblaze/kernel/dma.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c index 64bc39f40ba7..f230a8de0bcd 100644 --- a/arch/microblaze/kernel/dma.c +++ b/arch/microblaze/kernel/dma.c @@ -21,10 +21,10 @@ * default the offset is PCI_DRAM_OFFSET. */ -static inline void __dma_sync_page(void *vaddr, unsigned long offset, +static inline void __dma_sync_page(void *paddr, unsigned long offset, size_t size, enum dma_data_direction direction) { - unsigned long start = virt_to_phys(vaddr); + unsigned long start = (unsigned long)paddr; switch (direction) { case DMA_TO_DEVICE: @@ -79,10 +79,12 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, struct scatterlist *sg; int i; + /* FIXME this part of code is untested */ for_each_sg(sgl, sg, nents, i) { sg->dma_address = sg_phys(sg) + get_dma_direct_offset(dev); sg->dma_length = sg->length; - __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); + __dma_sync_page(page_to_phys(sg_page(sg)), sg->offset, + sg->length, direction); } return nents; @@ -107,7 +109,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev, struct dma_attrs *attrs) { BUG_ON(direction == DMA_NONE); - __dma_sync_page(page, offset, size, direction); + __dma_sync_page(page_to_phys(page), offset, size, direction); return page_to_phys(page) + offset + get_dma_direct_offset(dev); } @@ -117,8 +119,12 @@ static inline void dma_direct_unmap_page(struct device *dev, enum dma_data_direction direction, struct dma_attrs *attrs) { -/* There is not necessary to do cache cleanup */ - /* __dma_sync_page(dma_address, 0 , size, direction); */ +/* There is not necessary to do cache cleanup + * + * phys_to_virt is here because in __dma_sync_page is __virt_to_phys and + * dma_address is physical address + */ + __dma_sync_page((void *)dma_address, 0 , size, direction); } struct dma_map_ops dma_direct_ops = { |