pauln Hi, I'm looking for the memory registration function which
pauln takes a vaddr and and length, not an array of physical
pauln buffers. In gen1 this call is ib_memory_register(). The
pauln closest thing I can find is the reg_user_mr stuff which is
pauln used by uverbs. Could someone please tell me if
pauln req_user_mr is the right place to start?
No, reg_user_mr is used to register userspace memory.
There is no memory registration function for kernel consumers that
takes a virtual address and a length. This is intentional, because
there is not a general way to translate a kernel virtual address to a
bus address that can be passed to a device. In fact, not every kernel
virtual address may be used for DMA, and not every piece of DMA-able
memory has a kernel virtual address.
Every kernel consumer needs to handle the mapping of its memory to bus
addresses (note -- _not_ physical addresses).
- R.
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