On 02/13/2018 08:40 PM, Laura Abbott wrote: > On 02/12/2018 11:24 PM, Alexey Skidanov wrote: >> Hello, >> >> Correct me if I'm wrong, but there is no user space interface, similar >> to the dma_buf_start_cpu_access()/dma_buf_end_cpu_access() to handle IO >> coherency. That is, on the platforms, where the SW is responsible for IO >> coherency handling, the following sequences: >> - write to the buffer >> - DMA read >> or >> - DMA write >> - read from the buffer >> may be problematic. >> >> Thanks, >> Alexey >> > > Have you looked at the dma_buf sync ioctl? (see > include/uapi/linux/dma-buf.h) > > Thanks, > Laura No ... But this is it :) Thanks a lot, Alexey _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
