c6073954d9
Add some limit TLAST support for the streaming AXI source interface. An asserted TLAST signal marks the end of a packet and the following data beat is the first beat for the next packet. Currently the DMAC does not support for completing a transfer before all requested bytes have been transferred. So the way this limited TLAST support is implemented is by filling the remainder of the buffer with 0x00. While the DMAC is busy filling the buffer with zeros back-pressure is asserted on the external streaming AXI interface by keeping TREADY de-asserted. The end of a buffer is marked by a transfer that has the last bit set in the FLAGS control register. In the future we might add support for transfer completion before all requested bytes have been transferred. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> |
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