PCI: epf-mhi: Use iATU for small transfers
For transfers below 4K, let's use iATU since using eDMA for such small transfers is inefficient. This is mainly because setting up an eDMA transfer and waiting for completion adds some latency. This latency is negligible for large transfers but not for the smaller ones. With using iATU, there is an increase in ~50Mbps throughput on both MHI UL (Uplink) and DL (Downlink) channels. [kwilczynski: commit log] Link: https://lore.kernel.org/linux-pci/20230717065459.14138-7-manivannan.sadhasivam@linaro.org Signed-off-by:Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by:
Krzysztof Wilczyński <kwilczynski@kernel.org>
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