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imx6 opencl zero copy

Question asked by liu jkian on Jan 27, 2013
Latest reply on Mar 11, 2013 by Andre Silva
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Hi, i have a question about the opencl map(clEnqueueMapBuffer ) mechanism. if a opencl host program allocs a block of memory  by itself (such as malloc) not clCreateBuffer,then it calls clEnqueueMapBuffer to map the memory to gpu.can gpu use the mapped memory directly (or DMA )without any data copy (or DMA transfer )to vivante opencl runtime lib or to gpu global memory. Any Tips?thanks