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Simple PCIe FMC carrier SPEC
Commit 3bbec72a authored by Federico Vaga's avatar Federico Vaga
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doc: add information about DMA from debugfs 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent a77e93a2
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doc/sw-driver.rst
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......@@ -231,3 +231,9 @@ attributes. Here we focus only on those.
``<pci-id>/spec-<pci-id>/build_info`` [R]
It shows the FPGA configuration synthesis information
``<pci-id>/spec-<pci-id>/dma`` [RW]
It exports DMA capabilities to user-space. The user can ``open(2)``
and ``close(2)`` to request and release a DMA engine channel. Then,
the user can use ``lseek(2)`` to set the offset in the DDR, and
``read(2)``/``write(2)`` to start the DMA transfer.
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