topic Re: LS1046 data transfer via PCIe in Layerscape

LS1046 data transfer via PCIe

diljithka — Thu, 19 Nov 2020 09:54:09 GMT

Does LS1046 has the support data transfer via PCIe. we have a requirement for memory to pci memory and pci memory to memory t data transaction using this QDMA block in LS1046.Does LS1046 has the support for datat transfer via PCIe? can you provide the DMA driver support and sample application for the PCIe data transfer.?

Re: LS1046 data transfer via PCIe

yipingwang — Tue, 24 Nov 2020 03:49:24 GMT

Do you use LS1046 as EP or RC device?

Please refer to the following in Linux source code.

drivers/pci/controller/dwc/pci-layerscape-ep.c

drivers/misc/pci_endpoint_test.c

Documentation/PCI/endpoint/pci-test-howto.rst

Re: LS1046 data transfer via PCIe

diljithka — Tue, 24 Nov 2020 12:06:37 GMT

HI @yipingwang

thanks for your response.

we are using LS1046 as RC.

Our requirement is to transfer data via PCIe using QDMA.Is this possible in LS1046.Does the DMA engine inside LS1046 support data transfer from LS1046 to a slave device via PCIe .If so can you provide any sample application ?

Re: LS1046 data transfer via PCIe

yipingwang — Wed, 25 Nov 2020 07:49:39 GMT

We use the specific dmatest.c and fsl-qdma.c to test memory/PCIe DMA performance on ls1046a platform with LSDK kernel. We set PCIe address using:

echo [#pcie addr] > /sys/module/dmatest/parameters/pci_phys_addr

Please refer to Readme.txt in the attachment.