8 Jul
2015
8 Jul
'15
9:51 p.m.
Hi all,
GEM CMA uses dma_alloc_writecombine() when allocating the CMA objects. So IINM the GEM buffers are cache coherent. So is there any reason why DMA_ATTR_SKIP_CPU_SYNC is not passed to dma_map_sg() when GEM CMA prepares the buffer for dma on behalf of the dma-buf user? Is this just an oversight or is there something I have missed?
Thanks, Steve