pci - Linux Zero Copy -

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pci - Linux Zero Copy -

i have pci device needs read , write userspace. i'm trying utilize 0 copy; there way allocate, pin, , physical address of userspace address within userspace or need have kernel module that, say, calls virt_to_phys or get_user_pages? device's memory mapped userspace memory via mmio can pass info that's needed. thanks.

it total hack, limited linux range of memory , used mmio allocate memory device kernel unaware of.

linux pci zero-copy

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