I am still struggling with writing a user mode driver for a custom hardware
controller. I have successfully send commands and data, but I do not seem to
be able to read from the device. My question is how do I reverse the data
channel for a read() operation. As the device is relatively high speed, I do
not want to transfer byte-by-byte incurring a large context switch overhead,
but rather let the kernel buffer data for me. Please let me know if this is
possible or not.
Best regards,
David Lambert.
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