Displaying 1 result from an estimated 1 matches for "io_dma_alloc".
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cio_dma_zalloc
2007 Mar 16
7
Physical address mapping to user space in dom0 problem
I have a PCI device which can perform bus master DMA. I developed a PCI
device driver which can allocate DMA buffer and provide mmap operation to
map the I/O and DMA buffer to user space.
The PCI device driver works well under Linux 2.6.20. However it brokes under
XEN 3.0.4. It appears that mmap map to the wrong memory. remap_pfn_range in
mmap function return no error when it is used to map